CN107305604B - Terminal unlocking method and device - Google Patents

Abstract

The invention discloses a terminal unlocking method and device. Wherein, the method includes: detecting the current state of the terminal in the locked screen state; when detecting that the terminal is in a static state, extracting the first identity feature according to the wireless signal currently connected to the terminal, and when the first identity feature satisfies the first When the predetermined condition is met, the terminal is unlocked; when it is detected that the terminal is in a non-stationary state, the second identity feature measured by the sensor in the terminal is acquired, and when the second identity feature meets the second predetermined condition, the terminal is unlocked. The invention solves the technical problem of low unlocking efficiency caused by adopting the existing terminal unlocking method.

Description

Terminal unlocking method and device

technical field

The present invention relates to the field of computers, in particular to a terminal unlocking method and device.

Background technique

Before the smart terminal is turned on, identifying the user is an effective way to protect privacy in the smart terminal. At present, methods for identifying a user in the prior art mainly include: inputting a password, sliding an input pattern, and biometric information identification (such as fingerprint identification or facial identification).

However, before each use of the smart terminal, at least one of the above methods is used to identify the user's identity to realize the process of unlocking the smart terminal, but there are disadvantages that the password is easy to leak and input is time-consuming. On the one hand, when the user enters the password and slides the input pattern, it is easy to be peeped by others or intercepted by the detection device, resulting in the leakage of the password; in addition, the authentication time required for entering the password and sliding the input pattern is relatively long, and frequently Performing an input operation will greatly waste the user's time, thereby affecting the user experience; moreover, through biometric information identification, not only additional identification hardware is required, but the identification process is also easily affected by various factors, resulting in inaccurate identification results , requiring the user to perform repeated authentication, which in turn leads to an extension of the authentication time.

That is to say, the method provided by the prior art to identify the user to realize the unlocking of the smart terminal not only has low security and cannot guarantee the privacy of the user, but also requires a long authentication time, resulting in low unlocking efficiency. Greatly reduced.

For the above problems, no effective solution has been proposed yet.

Contents of the invention

Embodiments of the present invention provide a method and device for unlocking a terminal, so as to at least solve the technical problem of low unlocking efficiency caused by adopting an existing terminal unlocking method.

According to an aspect of an embodiment of the present invention, a method for unlocking a terminal is provided, including: detecting the current state of the terminal in the lock screen state; Extracting the first identity feature from the signal, unlocking the terminal when the first identity feature satisfies a first predetermined condition; acquiring a second identity feature measured by a sensor in the terminal when it is detected that the terminal is in a non-stationary state, When the second identity feature satisfies a second predetermined condition, the terminal is unlocked.

According to another aspect of the embodiments of the present invention, there is also provided a device for unlocking a terminal, including: a detection unit, configured to detect the current state of the terminal in the lock screen state; a first unlocking unit, configured to detect the above-mentioned When the terminal is in a static state, the first identity feature is extracted according to the wireless signal currently connected to the terminal, and when the first identity feature meets the first predetermined condition, the terminal is unlocked; the second unlocking unit is used to detect the above-mentioned When the terminal is in a non-stationary state, acquire the second identity feature measured by the sensor in the terminal, and unlock the terminal when the second identity feature satisfies a second predetermined condition.

In the embodiment of the present invention, by detecting the current state of the terminal, when the terminal is in a static state, it is possible to judge whether to unlock the terminal by using the first identity feature extracted from the wireless signal to which the terminal is currently connected. When in a non-stationary state, use the second identity feature measured by the sensor in the terminal to determine whether to unlock the terminal. That is to say, according to the different states of the terminal, different identity features are directly used for authentication and identification of the terminal, so as to realize fast and passive unlocking of the terminal in different states, without manually inputting passwords or other authentication information to the terminal , so as to reduce the authentication time used by the terminal in the unlocking process, so as to achieve the effect of improving the efficiency of terminal unlocking, thereby overcoming the problem of low terminal unlocking efficiency in the prior art.

In addition, terminals in different states are authenticated and identified through different identity features, which also improves the flexibility of unlocking the terminal, so as to avoid the problem of repeated unlocking and authentication when a single unlocking method fails to unlock the terminal. .

Further, the terminal is directly connected to the wireless signal to extract the first identity feature, and the second identity feature measured by the sensor in the terminal is used to unlock and authenticate the terminal, so as to avoid the leakage of the unlocking content and further ensure the terminal unlocking. security.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of an application environment of an optional terminal unlocking method according to an embodiment of the present invention;

FIG. 2 is a flow chart of an optional terminal unlocking method according to an embodiment of the present invention;

Fig. 3 is a flowchart of another optional terminal unlocking method according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of an optional terminal unlocking method according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of another optional terminal unlocking method according to an embodiment of the present invention;

FIG. 6 is a flowchart of another optional terminal unlocking method according to an embodiment of the present invention;

Fig. 7 is a schematic diagram of another optional terminal unlocking method according to an embodiment of the present invention;

Fig. 8 is a schematic diagram of an optional terminal unlocking device according to an embodiment of the present invention; and

Fig. 9 is a schematic diagram of an optional terminal according to an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Example 1

According to an embodiment of the present invention, an embodiment of the above-mentioned terminal unlocking method is provided. The terminal unlocking method can be but not limited to be applied in the application environment shown in FIG. 1 , where multiple terminals are connected to the network 104, for example, Terminal 102-1 and terminal 102-2 shown in FIG. 1 . Wherein, in this embodiment, the above-mentioned network 104 may include but not limited to a wireless signal network, such as a WIFI signal network. Taking the terminal 102-1 as an example, detect the current state of the terminal 102-1 in the locked screen state; when it is detected that the terminal 102-1 is in a static state, extract the first identity feature according to the currently connected wireless signal, and When the first identity feature satisfies the first predetermined condition, unlock the terminal 102-1; when it is detected that the terminal 102-1 is in a non-stationary state, acquire the second identity feature measured by the sensor in the terminal 102-1, And when the second identity feature satisfies the second predetermined condition, the terminal 102-1 is unlocked. That is to say, according to the different states of the terminal, different identity features are used for authentication and identification of the terminal, so as to realize the fast and passive unlocking of the terminal without manually inputting passwords or other authentication information, so as to improve the security of unlocking the terminal. efficiency effect.

Optionally, in this embodiment, the foregoing terminal may include but not limited to at least one of the following: a mobile phone, a tablet computer, a notebook computer, and a desktop PC. The foregoing is just an example, and this embodiment does not make any limitation thereto.

According to an embodiment of the present invention, a method for unlocking a terminal is provided, as shown in FIG. 2 , the method includes:

S202, detecting the current state of the terminal in the lock screen state;

S204. When it is detected that the terminal is in a static state, extract a first identity feature according to the wireless signal currently connected to the terminal, and unlock the terminal when the first identity feature satisfies a first predetermined condition;

S206. When it is detected that the terminal is in a non-stationary state, acquire a second identity feature measured by a sensor in the terminal, and unlock the terminal when the second identity feature satisfies a second predetermined condition.

Optionally, in this embodiment, the above method for unlocking a terminal may be applied to a terminal in a locked screen state, but is not limited to. Specifically, detect the current state of the terminal in the locked screen state, and when the terminal is in a static state, extract the first identity feature according to the wireless signal currently connected to the terminal, and when the first identity feature satisfies the first predetermined condition, unlock the terminal; when the terminal is in a non-stationary state, obtain the second identity feature measured by the sensor in the terminal, and unlock the terminal when the second identity feature satisfies a second predetermined condition. That is to say, by comparing the terminals detected in different states with different identity features, the terminals in different states can be quickly and passively unlocked, thereby reducing the authentication time used in the terminal unlocking process, and further The effect of improving terminal unlocking efficiency is achieved.

Optionally, in this embodiment, detecting the current state of the terminal in the locked screen state may be, but not limited to, implemented by detecting data measured by sensors in the terminal. That is to say, when the readings of the sensors are all 0, it means that the current state of the terminal is in a static state; and when the readings of the sensors are not 0, it means that the current state of the terminal is in a non-stationary state. The foregoing is only an example, and no limitation is set in this embodiment.

It should be noted that, in this embodiment, by detecting the current state of the terminal, when the terminal is in a static state, the first identity feature extracted from the wireless signal to which the terminal is currently connected is used to determine whether the terminal For unlocking, when the terminal is in a non-stationary state, use the second identity feature measured by the sensor in the terminal to determine whether to unlock the terminal. That is to say, according to the different states of the terminal, different identity features are directly used for authentication and identification of the terminal, so as to realize fast and passive unlocking of the terminal in different states, without manually inputting passwords or other authentication information to the terminal , so as to reduce the authentication time used by the terminal in the unlocking process, so as to achieve the effect of improving the efficiency of terminal unlocking, thereby overcoming the problem of low terminal unlocking efficiency in the prior art. In addition, terminals in different states are authenticated and identified through different identity features, which also improves the flexibility of unlocking the terminal, so as to avoid the problem of repeated unlocking and authentication when a single unlocking method fails to unlock the terminal. . Further, the terminal is directly connected to the wireless signal to extract the first identity feature, and the second identity feature measured by the sensor in the terminal is used to unlock and authenticate the terminal, so as to avoid the leakage of the unlocking content and further ensure the terminal unlocking. security.

Optionally, in this embodiment, when the terminal is in a stationary state, the above-mentioned first identity feature may be, but not limited to, a target breathing feature. Optionally, in this embodiment, extracting the first identity feature according to the wireless signal currently connected to the terminal includes: obtaining signal strength indication information (Received Signal Strength Indication, RSSI) and/or channel state information (Channel State Information, CSI); Extract the target respiratory feature in the first identity feature according to RSSI and/or CSI.

It should be noted that, since the human body can interfere with wireless signals, in this embodiment, the accurate identification of the identity is realized by detecting the change of the wireless signal (such as WIFI signal) to which the terminal is currently connected. For example, when breathing, the ups and downs of the chest will cause different interference to the WIFI signal. Therefore, by accurately detecting the change of the WIFI signal, the breathing characteristics near the terminal can be restored from the change, so as to achieve Features to determine whether to passively unlock the terminal.

In other words, when the deviation between the acquired target respiratory characteristics and the preset respiratory characteristics for the terminal is less than a predetermined threshold, it can be determined that the detected target respiratory characteristics meet the predetermined conditions, and the terminal can be unlocked without sending a notification to the terminal. Voluntarily enter any verification information. Therefore, the authentication time for unlocking the terminal is reduced, and the efficiency of unlocking the terminal is ensured.

Optionally, in this embodiment, the above-mentioned second identity feature may include, but is not limited to: sports feature, input feature. Wherein, the above-mentioned movement characteristics include at least one of the following: pace speed, step frequency, and step width; the above-mentioned input characteristics include at least one of the following: input force, input displacement, and input frequency.

Optionally, in this embodiment, the above-mentioned sensors in the terminal may include but not limited to: an acceleration sensor and an angular velocity sensor. Wherein, the above-mentioned angular velocity sensor may be a gyroscope. That is to say, whether the terminal is in a non-stationary state is detected by the above-mentioned sensor, and when it is detected that the terminal is in a non-stationary state, the data measured by the above-mentioned sensor can be used to determine whether to unlock the terminal.

It should be noted that, in this embodiment, when the data measured by the acceleration sensor is used for unlocking determination, the above-mentioned second identity feature may correspond to a motion feature. That is to say, when the reading of the acceleration sensor is not 0, it means that the terminal is in a motion state, and it is judged whether to unlock the terminal during the motion by acquiring the corresponding motion characteristics. For example, in the scene where the terminal is carried and moved, the acceleration sensor can be used to obtain the motion feature in the second identity feature, and to perform identity authentication according to exercise habits, so as to determine whether to unlock the terminal.

In addition, when the data measured by the angular velocity sensor is used for unlocking judgment, the above-mentioned second identity feature may correspond to an input feature. That is to say, when the reading of the angular velocity sensor is not 0, it means that the terminal is in the touch interaction state, and whether the terminal is unlocked during the interaction process is determined by acquiring the input characteristics of the interaction process.

Optionally, in this embodiment, the above-mentioned application scenario of using an angular velocity sensor to acquire input features in the second identity feature may include but not limited to one of the following:

1) When it is detected that the terminal is in a non-stationary state and the acceleration sensor does not measure the motion feature, acquire the input feature measured by the angular velocity sensor. For example, during the process of interaction between the user and the terminal, the input features are acquired through the angular velocity sensor.

2) When the current state of the terminal cannot be detected, the input characteristics measured by the angular velocity sensor are obtained. For example, in the case that passive unlocking fails, the terminal is actively unlocked in a manner of acquiring input features through an angular velocity sensor.

Optionally, in this embodiment, obtaining the input features of the second identity features measured by the angular velocity sensor in the terminal may include but not limited to: displaying prompt information on the terminal for prompting to obtain predetermined text, where the predetermined The text in is randomly generated verification text for unlocking; in the process of obtaining the predetermined text above, the input features measured by the angular velocity sensor are obtained.

That is to say, as a supplementary way to passive unlocking, this embodiment also provides an active unlocking way, which judges whether to unlock the terminal according to the input characteristics measured by the angular velocity sensor. It should be noted that, in this embodiment, the above-mentioned method is different from related technologies. It is not necessary to obtain the specific content of the input, but to achieve the matching with the input habit by obtaining the input method at the time of input, so as to achieve the purpose of protecting privacy, and then An effect of improving security of unlocking is achieved.

Specifically, as shown in FIG. 3, the current state of the terminal in the lock screen state is detected. When the terminal is in a static state, the target breath in the first identity feature is obtained according to the change of the wireless signal (such as the WIFI signal). feature. When the terminal is in a non-stationary state, if the reading of the acceleration sensor is not 0, it means that the terminal is in a motion state, and the motion feature in the second identity feature is acquired.

It should be noted that, in the case that the above two features are identifiable, whether to perform passive unlocking of the terminal can be judged based on the acquired target breathing feature or motion feature respectively. In addition, in the case that the above two features cannot be identified, the input feature in the second identity feature can be obtained through the angular velocity sensor, so as to actively unlock the terminal by using the input feature when inputting during the interaction process. Here, the method of obtaining the input feature in the second identity feature through the angular velocity sensor can also be used as a separate unlocking method, so as to realize direct active unlocking of the terminal. There is no limitation on this in this embodiment.

Optionally, in this embodiment, after the terminal locks the screen again, it is possible, but not limited to, to detect the current state of the terminal again, so as to implement different identity features for the terminal according to the different states of the terminal. Safe and fast authentication and identification. That is to say, after the screen of the terminal is locked, that is, in the screen-locked state, the above method for unlocking the terminal can be repeatedly performed on the terminal.

Through the embodiments provided in this application, by detecting the current state of the terminal, when the terminal is in a static state, it is possible to use the first identity feature extracted from the wireless signal to which the terminal is currently connected to determine whether to unlock the terminal. When the terminal is in a non-stationary state, the second identity feature measured by the sensor inside the terminal is used to determine whether to unlock the terminal. That is to say, according to the different states of the terminal, different identity features are directly used for authentication and identification of the terminal, so as to realize fast and passive unlocking of the terminal in different states, without manually inputting passwords or other authentication information to the terminal , so as to reduce the authentication time used by the terminal in the unlocking process, so as to achieve the effect of improving the efficiency of terminal unlocking, thereby overcoming the problem of low terminal unlocking efficiency in the prior art.

As an optional solution, extracting the first identity feature according to the wireless signal currently connected to the terminal includes:

S1, acquiring signal strength indication information (Received Signal StrengthIndication, RSSI) and/or channel state information (Channel State Information, CSI) of the wireless signal;

S2. Extract the target respiratory feature in the first identity feature according to the RSSI and/or CSI.

Optionally, in this embodiment, after obtaining the RSSI and/or CSI, it further includes: performing de-interference processing on the RSSI and/or CSI in the time domain collected by the terminal through a filter, and de-interfering the de-interferenced The signal is converted to a frequency domain signal.

It should be noted that, in this embodiment, the RSSI and/or CSI converted into a frequency domain signal in the frequency domain after interference removal may be used to indicate the target respiratory feature in the first identity feature, such as the respiratory frequency. That is to say, the target breathing feature in the first identity feature extracted according to the RSSI and/or CSI is matched with the preset breathing feature, so as to realize authentication and identification of the user identity.

Optionally, in this embodiment, extracting the target respiratory feature in the first identity feature may include but not limited to one of the following:

1) The frequency corresponding to the maximum peak value in the frequency domain is set as the target respiratory frequency in the target respiratory feature;

2) Obtain the frequencies corresponding to the first M peaks in the frequency domain, and use the frequencies corresponding to the first M peaks as the target respiratory feature.

That is to say, the target respiration feature may include but not limited to a target respiration frequency, wherein the target respiration frequency may be determined in at least one of the following ways: 1) Setting the frequency corresponding to the maximum peak value of the RSSI in the frequency domain to Target respiratory rate; 2) Set the frequency corresponding to the maximum peak value of CSI in the frequency domain as the target respiratory rate; 3) According to the preset weight, according to the frequency corresponding to the maximum peak value of RSSI in the frequency domain, and CSI in the frequency domain The frequency corresponding to the largest peak in is calculated and determined.

For example, in mode 3), it is assumed that the frequency corresponding to the maximum peak value of RSSI in the frequency domain is F1, the frequency corresponding to the maximum peak value of CSI in the frequency domain is F2, the preset weight corresponding to RSSI is a1, and the frequency corresponding to CSI The corresponding preset weight is a2, and the target breathing frequency F in the target breathing feature can be obtained in the following manner: F=F1*a1+F2+a2.

In addition, in this embodiment, the target breathing feature may also include, but not limited to, frequencies corresponding to the first M peaks in the frequency domain. That is to say, the target breathing feature includes a group of multiple frequencies used to indicate the current breathing feature. Wherein, the above-mentioned target breathing features include at least one of the following: 1) the frequencies corresponding to the first M peaks of RSSI in the frequency domain; 2) the frequencies corresponding to the first M peaks of CSI in the frequency domain; The weight is set to be the frequency obtained by calculating the frequencies corresponding to the first M peaks of the RSSI in the frequency domain and the frequencies corresponding to the first M peaks of the CSI in the frequency domain.

That is to say, in this embodiment, the target respiratory feature can be obtained solely according to the frequency corresponding to the peak value of the RSSI in the frequency domain, or the target respiratory feature can be obtained solely according to the frequency corresponding to the peak value of the CSI in the frequency domain , and the frequency corresponding to the peak value of RSSI and CSI in the frequency domain can also be combined to obtain the target respiratory feature. For example, the way of combining RSSI and CSI may be, but not limited to, calculate and acquire target respiratory features after the combination of the two according to different pre-allocated weights.

Wherein, it should be noted that, in the way of combining RSSI and CSI provided in the above-mentioned embodiment to obtain the target respiratory characteristics, the above-mentioned combination of RSSI and CSI is just an example, which is not limited in this embodiment. Combining the two types of information according to mathematical calculations to represent breathing features can be included in the concept of the embodiments of the present invention.

Through the embodiments provided in this application, by acquiring the signal strength indication information RSSI and/or channel state information CSI of the wireless signal, the target breathing feature in the first identity feature is extracted according to the RSSI and/or CSI, so as to achieve accurate breathing according to the breathing feature. Quickly determine whether to passively unlock the terminal without actively inputting authentication information such as passwords, so as to reduce the authentication time of the terminal, thereby achieving the effect of improving the efficiency of terminal unlocking.

As an alternative,

S1, extracting the target respiratory feature in the first identity feature according to RSSI and/or CSI includes:

S11, converting the RSSI and/or CSI in the time domain to obtain the RSSI and/or CSI in the frequency domain;

S12. Obtain target respiratory characteristics according to the frequency corresponding to the peak value of RSSI and/or CSI in the frequency domain;

S2, when the first identity feature satisfies the first predetermined condition, unlocking the terminal includes:

S21, judging whether the deviation between the target breathing characteristic and the preset breathing characteristic is smaller than a first predetermined threshold;

S22. When the deviation between the target breathing characteristic and the preset breathing characteristic is smaller than a first predetermined threshold, unlock the terminal.

Optionally, in this embodiment, acquiring the target respiratory feature according to the frequency corresponding to the peak value of RSSI and/or CSI in the frequency domain includes:

1) The frequency corresponding to the maximum peak value in the frequency domain is set as the target respiratory frequency in the target respiratory feature;

2) Obtain the frequencies corresponding to the first M peaks in the frequency domain, and use the frequencies corresponding to the first M peaks as the target respiratory feature.

Optionally, in this embodiment, the deviation between the target breathing characteristic and the preset breathing characteristic may include but not limited to at least one of the following: the difference between the target breathing characteristic and the preset breathing characteristic value, the squared difference between the target breath signature and the preset breath signature. It should be noted that the deviation between the target breathing feature and the preset breathing feature can also be obtained by other calculation methods used to indicate the difference between the two, the above is just an example, and in this embodiment This does not make any restrictions.

Specifically combined with the example shown in Figure 4, assuming that the CSI of the current wireless signal is obtained, the CSI within 60s in the time domain (as shown in Figure 4(a)) is converted to obtain the CSI in the frequency domain (as shown in Figure 4(a) b) shown). Further, assuming that the frequency corresponding to the maximum peak value of CSI in the frequency domain is set as the target respiration frequency, then in the process of determining whether to unlock the terminal by comparing the deviation between the target respiration characteristics and the preset respiration characteristics , it may be determined whether to unlock the terminal by comparing the deviation between the target breathing frequency in the target breathing feature and the preset breathing frequency in the preset breathing feature. As shown in Figure 4(b), assuming that the maximum peak value appears at the 37th position, it means that 37 breaths have been taken within 60s, and the target breathing rate can be obtained as 60/37=1.6s. Further, assuming that the preset breathing frequency is 1.5s, the difference between the target breathing frequency and the preset breathing frequency is 0.1s, which is less than the first predetermined threshold of 0.2s, and it is judged that the target breathing characteristic is different from the preset breathing If the deviation between the two features is smaller than the first predetermined threshold, the terminal can be unlocked.

For another example, if it is assumed that the frequency corresponding to the first M peaks of CSI in the frequency domain is used as the target breathing feature, then it is determined whether to unlock the terminal by comparing the deviation between the target breathing feature and the preset breathing feature. During the process, it may be determined whether to unlock the terminal by comparing the deviation between the frequency in the target breathing feature and the preset breathing frequency. For example, M differences between each frequency in the target breathing feature and a preset breathing frequency may be obtained, but not limited to, and a square difference is calculated, which is used as a deviation between the two. Wherein, the aforementioned preset breathing frequency may be one frequency value, or M frequency values may be set correspondingly, which is not limited in this embodiment.

It should be noted that, in this embodiment, for the manner in which the frequency corresponding to the first M peaks is used as the target respiratory characteristic, the manner of calculating the deviation may also include other calculation manners. The foregoing is only an example, and no limitation is set in this embodiment.

Through the embodiment provided by this application, the target respiratory frequency in the target respiratory feature is acquired according to the frequency corresponding to the peak value of RSSI and/or CSI in the frequency domain, so as to realize the comparison between the target respiratory frequency and the preset respiratory frequency Whether the deviation between them is less than the first predetermined threshold is used to determine whether the first identity feature satisfies the first predetermined condition, so as to realize the authentication of the terminal in the static state according to the first identity feature, so as to reduce the authentication time and improve the unlocking of the terminal. efficiency.

As an optional solution, acquiring the second identity feature measured by the sensor in the terminal includes at least one of the following:

S1. Acquire motion features in the second identity feature measured by the acceleration sensor in the terminal, where the motion features include at least one of the following: pace, pace, and pace;

S2. Obtain an input feature in the second identity feature measured by the angular velocity sensor in the terminal, where the input feature is used to indicate an input method when an input operation is performed.

Optionally, in this embodiment, but not limited to, the motion feature in the second identity feature may be extracted according to the data in the time domain and the converted data in the frequency domain measured by the acceleration sensor. That is to say, according to the data collected by the acceleration sensor, the acceleration of movement in various directions is judged, so as to restore various movement characteristics such as the current stride frequency, pace speed, and stride width.

For example, assuming that the acceleration sensor input in the current terminal is a three-axis acceleration signal, the current step width, pace, etc. can be obtained through the signals output by the above three axes in the time domain, and the step frequency can be obtained through the signals output in the frequency domain. The foregoing is only an example, and no limitation is set in this embodiment.

Optionally, in this embodiment, the foregoing angular velocity sensor may include, but is not limited to, a gyroscope within the terminal. That is to say, the input feature in the second identity feature is acquired by using the gyroscope to detect the flip angle of the terminal at various angles when the input operation is performed, so as to obtain the current input mode when the input operation is performed.

It should be noted that, in this embodiment, when an input operation is performed, the terminal will slightly flip at various angles, and these flips can be detected by the gyroscope. That is to say, by obtaining the data detected by the gyroscope, information such as the frequency, speed, and severity of the input text during the current input operation can be restored, so as to realize the use of the input method to judge whether it is consistent with the preset input method. The customary input method is used to realize the unlocking and authentication of the terminal without obtaining the actual content of the input, avoiding the information used for authentication from being leaked, and thus improving the security of terminal unlocking.

Through the embodiments provided in this application, the terminal is authenticated and unlocked through the motion feature and input feature in the second identity feature, which not only ensures the efficiency of unlocking, but also improves the security of terminal unlocking.

As an optional solution, obtaining the input features in the second identity features measured by the angular velocity sensor in the terminal includes:

S1. When it is detected that the terminal is in a non-stationary state and the acceleration sensor does not measure the motion feature, acquire the input feature measured by the angular velocity sensor.

Optionally, in this embodiment, the application scenario of using the angular velocity sensor to measure the input feature may include but not limited to at least one of the following:

1) When it is detected that the terminal is in a non-stationary state and the acceleration sensor does not measure the motion feature, acquire the input feature measured by the angular velocity sensor. For example, as shown in FIG. 3 , during normal interaction between the user and the terminal, as a separate unlocking manner, an input feature is acquired through an angular velocity sensor.

2) When the current state of the terminal cannot be detected, the input characteristics measured by the angular velocity sensor are obtained. For example, as shown in FIG. 3 , in the case where passive unlocking (that is, using breathing and motion features to unlock) fails, the terminal can also be actively unlocked by acquiring input features through an angular velocity sensor.

Through the embodiments provided in this application, the method of unlocking the terminal through the acquired input characteristics measured by the angular velocity sensor can be used as an independent authentication method alone, or as a supplementary method to passive unlocking, so as to realize The active unlocking of the terminal ensures that users can unlock and use the terminal in time, avoiding the problem of prolonging the authentication time caused by repeated authentication due to unlocking failure, and thus achieving the effect of improving unlocking efficiency. Furthermore, by actively unlocking without obtaining input content, the security of terminal unlocking will be further ensured.

As an optional solution, obtaining the input features in the second identity features measured by the angular velocity sensor in the terminal includes:

S1, displaying a prompt message on the terminal, wherein the prompt message is used to prompt acquisition of predetermined text, and the predetermined text is randomly generated verification text for unlocking;

S2, during the process of acquiring the predetermined text, acquire the input features measured by the angular velocity sensor.

Specifically, the following examples are used for description. For example, as shown in FIG. 5 , a pop-up window on the terminal displays prompt information for prompting to obtain predetermined text: "Please enter the following text:", such as "verification information". Wherein, the above predetermined text (that is, "verification information) may be, but not limited to, a piece of randomly generated verification text for unlocking, rather than a password set in advance. When entering the predetermined text currently prompted, the gyroscope in the terminal The input feature will be obtained and compared with the preset input feature to determine whether it is a legitimate user and achieve the purpose of identity authentication.

Through the embodiment provided by this application, the predetermined text is obtained by displaying prompt information on the terminal, so that the angular velocity sensor is used to obtain the input feature during the process of obtaining the predetermined text, so as to achieve the effect of actively unlocking and authenticating the terminal.

As an alternative,

S1. Obtaining input features in the second identity feature measured by the angular velocity sensor in the terminal includes: acquiring input parameters measured by the angular velocity sensor, wherein the input parameters include at least one of the following: input force, input displacement, and input frequency;

S2. When the second identity feature satisfies the second predetermined condition, unlocking the terminal includes: respectively judging whether the measured input parameters match the corresponding preset input parameters; when it is judged that the number of matched parameters reaches the second predetermined threshold , it is determined that the second predetermined condition is met, and the terminal is unlocked.

It should be noted that, in this embodiment, the above-mentioned input force can be directly obtained by, but not limited to, the flip angle measured by the angular velocity sensor; the above-mentioned input displacement can be calculated by, but not limited to, the flip angle and time measured by the angular velocity sensor in the time domain obtained; the above input frequency can be obtained, but not limited to, by the frequency corresponding to the peak value measured by the angular velocity sensor in the frequency domain.

Optionally, in this embodiment, the second predetermined threshold may be set to different values according to different measurement accuracies but not limited to. Wherein, the larger the second predetermined threshold is, the higher the measurement accuracy is. That is to say, here the input feature includes a plurality of input parameters. After comparing and matching the above-mentioned plurality of input parameters, if it is determined that the number of matched parameters reaches the second predetermined threshold, it means that the currently measured first The input features in the two identity features meet the second predetermined condition, and the terminal can be unlocked.

Optionally, in this embodiment, for each predetermined character, the input force and the input displacement may be respectively acquired once, but not limited to. For example, assuming that the predetermined text is "verification information", the input force and input displacement measured by the angular velocity sensor respectively when the characters "verify", "certificate", "xin" and "information" are input can be obtained respectively. Further, combined with the input frequency acquired during the input process, a comprehensive judgment may be made on the input features of multiple predetermined characters to determine whether to unlock the terminal.

Through the embodiment provided by this application, by acquiring the input parameters measured by the angular velocity sensor, and respectively judging whether the measured input parameters match the corresponding preset input parameters; When the threshold is exceeded, the terminal is actively unlocked to achieve the purpose of ensuring the security of unlocking.

As an optional solution, obtaining the input parameters measured by the angular velocity sensor includes:

S1, according to the rotational angular velocity measured by the angular velocity sensor in the time domain, the input strength and input displacement in the input feature are obtained;

S2, converting the rotational angular velocity in the time domain to obtain the rotational angular velocity in the frequency domain;

S3. Obtain the input frequency in the input feature according to the frequency corresponding to the peak value of the rotational angular velocity in the frequency domain.

Specifically combined with the following examples for illustration, steps S602-S614 shown in Figure 6, obtain the three-axis gyroscope signal in the time domain, and then perform deviation correction and filtering processing. On the one hand, after extracting the time domain features, the input features at the time of input can be obtained The input strength and input displacement in the input; on the other hand, after performing Fourier transformation, after extracting the frequency domain features, the input frequency in the input features can be obtained.

It should be noted that the above steps S606-S608 and the step numbers in steps S610-S614 are only for distinguishing, and do not limit the sequence of execution.

It should be noted that since the input force and input displacement can be obtained separately for each predetermined character, in this embodiment, the input force and input displacement in the input feature obtained in the time domain may include but not limited to at least one of the following: The input force and the input displacement are obtained according to the maximum peak value, the input force and the input displacement are obtained according to the first peak value, and the average input force and the average input displacement of multiple predetermined characters are obtained. The foregoing is only an example, and no limitation is set in this embodiment.

For example, assume that the input force and the input displacement are obtained according to the first peak value (ie, the corresponding peak value when the first predetermined character is input). As shown in FIG. 7 , the angular velocity measured by the gyroscope in the time domain is shown, and the input strength can be represented by the amplitude of the first peak in the time domain signal shown in FIG. 7 , for example, 1.8. In addition, the input displacement can be represented by the calculation result after calculating the first peak value and the corresponding time in the time domain signal shown in FIG. 7 , for example, 2*1.8=3.6.

It should be noted that the data measured by the above-mentioned angular velocity sensor in the time domain can be used, but not limited to, to represent input force and input displacement, and these values do not have specific physical units.

For another example, after converting the above-mentioned rotational angular velocity in the time domain to obtain the rotational angular velocity in the frequency domain, the input frequency can be obtained according to the frequency corresponding to the peak value in the frequency domain. The process will not be repeated in this embodiment.

Through the embodiments provided by this application, the input features are obtained according to the input parameters measured by the angular velocity sensor in the time domain and the frequency domain, so as to realize whether to use the input features used to indicate the input mode during the input process to determine whether to perform active actions on the terminal. Unlock without obtaining the input content, thereby achieving the effect of improving the security of terminal unlocking.

As an optional solution, separately judging whether the measured input parameters match the corresponding preset input parameters includes:

S1, judging whether the deviation between the measured input strength and the corresponding preset input strength is smaller than a third predetermined threshold;

S2, judging whether the deviation between the measured input displacement and the corresponding preset input displacement is smaller than a fourth predetermined threshold; and

S3, judging whether the deviation between the measured input frequency and the corresponding preset input frequency is smaller than a fifth predetermined threshold.

Optionally, in this embodiment, the above-mentioned third predetermined threshold can be set to different values according to different precision requirements; the above-mentioned fourth predetermined threshold can be set to different values according to different precision requirements; according to different precision requirements It is required that the above-mentioned fifth predetermined threshold can be set to different values.

Optionally, in this embodiment, the deviation between the measured input parameter and the preset input parameter may include but not limited to at least one of the following: a difference between the two, a square difference between the two . It should be noted that the deviation between the two may also be obtained through other calculation methods used to indicate the difference between the two, and the above is only an example, which is not limited in this embodiment.

Through the embodiments provided in the present application, the number of matched parameters is obtained by separately judging whether the measured input parameters match the corresponding preset input parameters, so as to realize accurate judgment on whether to unlock the terminal.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is Better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to enable a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention.

Example 2

According to an embodiment of the present invention, a terminal unlocking device for implementing the above terminal unlocking method is also provided, as shown in FIG. 8 , the device includes:

1) The detection unit 802 is used to detect the current state of the terminal in the lock screen state;

2) The first unlocking unit 804 is configured to extract a first identity feature according to the wireless signal currently connected to the terminal when it is detected that the terminal is in a static state, and unlock the terminal when the first identity feature satisfies a first predetermined condition;

3) The second unlocking unit 806 is configured to acquire the second identity feature measured by the sensor in the terminal when it is detected that the terminal is in a non-stationary state, and unlock the terminal when the second identity feature satisfies a second predetermined condition.

Optionally, in this embodiment, the above device for unlocking a terminal may, but is not limited to, be applied to a terminal in a screen-locked state. Specifically, detect the current state of the terminal in the locked screen state, and when the terminal is in a static state, extract the first identity feature according to the wireless signal currently connected to the terminal, and when the first identity feature satisfies the first predetermined condition, unlock the terminal; when the terminal is in a non-stationary state, obtain the second identity feature measured by the sensor in the terminal, and unlock the terminal when the second identity feature satisfies a second predetermined condition. That is to say, by comparing the terminals detected in different states with different identity features, the terminals in different states can be quickly and passively unlocked, thereby reducing the authentication time used in the terminal unlocking process, and further The effect of improving terminal unlocking efficiency is achieved.

Optionally, in this embodiment, detecting the current state of the terminal in the locked screen state may be, but not limited to, implemented by detecting data measured by sensors in the terminal. That is to say, when the readings of the sensors are all 0, it means that the current state of the terminal is in a static state; and when the readings of the sensors are not 0, it means that the current state of the terminal is in a non-stationary state. The foregoing is only an example, and no limitation is set in this embodiment.

It should be noted that, in this embodiment, by detecting the current state of the terminal, when the terminal is in a static state, the first identity feature extracted from the wireless signal to which the terminal is currently connected is used to determine whether the terminal For unlocking, when the terminal is in a non-stationary state, use the second identity feature measured by the sensor in the terminal to determine whether to unlock the terminal. That is to say, according to the different states of the terminal, different identity features are directly used for authentication and identification of the terminal, so as to realize fast and passive unlocking of the terminal in different states, without manually inputting passwords or other authentication information to the terminal , so as to reduce the authentication time used by the terminal in the unlocking process, so as to achieve the effect of improving the efficiency of terminal unlocking, thereby overcoming the problem of low terminal unlocking efficiency in the prior art. In addition, terminals in different states are authenticated and identified through different identity features, which also improves the flexibility of unlocking the terminal, so as to avoid the problem of repeated unlocking and authentication when a single unlocking method fails to unlock the terminal. . Further, the terminal is directly connected to the wireless signal to extract the first identity feature, and the second identity feature measured by the sensor in the terminal is used to unlock and authenticate the terminal, so as to avoid the leakage of the unlocking content and further ensure the terminal unlocking. security.

Optionally, in this embodiment, when the terminal is in a stationary state, the above-mentioned first identity feature may be, but not limited to, a target breathing feature. Optionally, in this embodiment, extracting the first identity feature according to the wireless signal currently connected to the terminal includes: obtaining signal strength indication information (Received Signal Strength Indication, RSSI) and/or channel state information (Channel State Information, CSI); Extract the target respiratory feature in the first identity feature according to RSSI and/or CSI.

It should be noted that, since the human body can interfere with wireless signals, in this embodiment, the accurate identification of the identity is realized by detecting the change of the wireless signal (such as WIFI signal) to which the terminal is currently connected. For example, when breathing, the ups and downs of the chest will cause different interference to the WIFI signal. Therefore, by accurately detecting the change of the WIFI signal, the breathing characteristics near the terminal can be restored from the change, so as to achieve Features to determine whether to passively unlock the terminal.

In other words, when the deviation between the acquired target respiratory characteristics and the preset respiratory characteristics for the terminal is less than a predetermined threshold, it can be determined that the detected target respiratory characteristics meet the predetermined conditions, and the terminal can be unlocked without sending a notification to the terminal. Voluntarily enter any verification information. Therefore, the authentication time for unlocking the terminal is reduced, and the efficiency of unlocking the terminal is ensured.

Optionally, in this embodiment, the above-mentioned second identity feature may include, but is not limited to: sports feature, input feature. Wherein, the above-mentioned movement characteristics include at least one of the following: pace speed, step frequency, and step width; the above-mentioned input characteristics include at least one of the following: input force, input displacement, and input frequency.

Optionally, in this embodiment, the above-mentioned sensors in the terminal may include but not limited to: an acceleration sensor and an angular velocity sensor. Wherein, the above-mentioned angular velocity sensor may be a gyroscope. That is to say, whether the terminal is in a non-stationary state is detected by the above-mentioned sensor, and when it is detected that the terminal is in a non-stationary state, the data measured by the above-mentioned sensor can be used to determine whether to unlock the terminal.

It should be noted that, in this embodiment, when the data measured by the acceleration sensor is used for unlocking determination, the above-mentioned second identity feature may correspond to a motion feature. That is to say, when the reading of the acceleration sensor is not 0, it means that the terminal is in a motion state, and it is judged whether to unlock the terminal during the motion by acquiring the corresponding motion characteristics. For example, in the scene where the terminal is carried and moved, the acceleration sensor can be used to obtain the motion feature in the second identity feature, and to perform identity authentication according to exercise habits, so as to determine whether to unlock the terminal.

In addition, when the data measured by the angular velocity sensor is used for unlocking judgment, the above-mentioned second identity feature may correspond to an input feature. That is to say, when the reading of the angular velocity sensor is not 0, it means that the terminal is in the touch interaction state, and whether the terminal is unlocked during the interaction process is determined by acquiring the input characteristics of the interaction process.

Optionally, in this embodiment, the above-mentioned application scenario of using an angular velocity sensor to acquire input features in the second identity feature may include but not limited to one of the following:

1) When it is detected that the terminal is in a non-stationary state and the acceleration sensor does not measure the motion feature, acquire the input feature measured by the angular velocity sensor. For example, during the process of interaction between the user and the terminal, the input features are acquired through the angular velocity sensor.

2) When the current state of the terminal cannot be detected, the input characteristics measured by the angular velocity sensor are acquired. For example, in the case that passive unlocking fails, the terminal is actively unlocked in a manner of acquiring input features through an angular velocity sensor.

Optionally, in this embodiment, obtaining the input features of the second identity features measured by the angular velocity sensor in the terminal may include but not limited to: displaying prompt information on the terminal for prompting to obtain predetermined text, where the predetermined The text in is randomly generated verification text for unlocking; in the process of obtaining the predetermined text above, the input features measured by the angular velocity sensor are obtained.

That is to say, as a supplementary way to passive unlocking, this embodiment also provides an active unlocking way, which judges whether to unlock the terminal according to the input characteristics measured by the angular velocity sensor. It should be noted that, in this embodiment, the above-mentioned method is different from related technologies. It is not necessary to obtain the specific content of the input, but to achieve the matching with the input habit by obtaining the input method at the time of input, so as to achieve the purpose of protecting privacy, and then An effect of improving security of unlocking is achieved.

Specifically, as shown in FIG. 3, the current state of the terminal in the lock screen state is detected. When the terminal is in a static state, the target breath in the first identity feature is obtained according to the change of the wireless signal (such as the WIFI signal). feature. When the terminal is in a non-stationary state, if the reading of the acceleration sensor is not 0, it means that the terminal is in a motion state, and the motion feature in the second identity feature is acquired.

It should be noted that, in the case that the above two features are identifiable, whether to perform passive unlocking of the terminal can be judged based on the acquired target breathing feature or motion feature respectively. In addition, in the case that the above two features cannot be identified, the input feature in the second identity feature can be obtained through the angular velocity sensor, so as to actively unlock the terminal by using the input feature when inputting during the interaction process. Here, the method of obtaining the input feature in the second identity feature through the angular velocity sensor can also be used as a separate unlocking method, so as to realize direct active unlocking of the terminal. There is no limitation on this in this embodiment.

Optionally, in this embodiment, after the terminal locks the screen again, it is possible, but not limited to, to detect the current state of the terminal again, so as to implement different identity features for the terminal according to the different states of the terminal. Safe and fast authentication and identification. That is to say, after the screen of the terminal is locked, that is, in the screen-locked state, the terminal unlocking device may be repeatedly executed on the terminal.

Through the embodiments provided in this application, by detecting the current state of the terminal, when the terminal is in a static state, it is possible to use the first identity feature extracted from the wireless signal to which the terminal is currently connected to determine whether to unlock the terminal. When the terminal is in a non-stationary state, the second identity feature measured by the sensor inside the terminal is used to determine whether to unlock the terminal. That is to say, according to the different states of the terminal, different identity features are directly used for authentication and identification of the terminal, so as to realize fast and passive unlocking of the terminal in different states, without manually inputting passwords or other authentication information to the terminal , so as to reduce the authentication time used by the terminal in the unlocking process, so as to achieve the effect of improving the efficiency of terminal unlocking, thereby overcoming the problem of low terminal unlocking efficiency in the prior art.

As an optional solution, the first unlocking unit includes:

1) a first acquiring module, configured to acquire signal strength indication information (Received SignalStrength Indication, RSSI) and/or channel state information (Channel State Information, CSI) of the wireless signal;

2) An extraction module, configured to extract the target respiratory feature in the first identity feature according to the RSSI and/or CSI.

Optionally, in this embodiment, after obtaining the RSSI and/or CSI, it further includes: performing de-interference processing on the RSSI and/or CSI in the time domain collected by the terminal through a filter, and de-interfering the de-interferenced The signal is converted to a frequency domain signal.

It should be noted that, in this embodiment, the RSSI and/or CSI converted into a frequency domain signal in the frequency domain after interference removal may be used to indicate the target respiratory feature in the first identity feature, such as the respiratory frequency. That is to say, the target breathing feature in the first identity feature extracted according to the RSSI and/or CSI is matched with the preset breathing feature, so as to realize authentication and identification of the user identity.

Optionally, in this embodiment, extracting the target respiratory feature in the first identity feature may include but not limited to one of the following:

1) The frequency corresponding to the maximum peak value in the frequency domain is set as the target respiratory frequency in the target respiratory feature;

2) Obtain the frequencies corresponding to the first M peaks in the frequency domain, and use the frequencies corresponding to the first M peaks as the target respiratory feature.

That is to say, the target respiration feature may include but not limited to a target respiration frequency, wherein the target respiration frequency may be determined in at least one of the following ways: 1) Setting the frequency corresponding to the maximum peak value of the RSSI in the frequency domain to Target respiratory rate; 2) Set the frequency corresponding to the maximum peak value of CSI in the frequency domain as the target respiratory rate; 3) According to the preset weight, according to the frequency corresponding to the maximum peak value of RSSI in the frequency domain, and CSI in the frequency domain The frequency corresponding to the largest peak in is calculated and determined.

For example, in mode 3), it is assumed that the frequency corresponding to the maximum peak value of RSSI in the frequency domain is F1, the frequency corresponding to the maximum peak value of CSI in the frequency domain is F2, the preset weight corresponding to RSSI is a1, and the frequency corresponding to CSI The corresponding preset weight is a2, and the target breathing frequency F in the target breathing feature can be obtained in the following manner: F=F1*a1+F2+a2.

In addition, in this embodiment, the target breathing feature may also include, but not limited to, frequencies corresponding to the first M peaks in the frequency domain. That is to say, the target breathing feature includes a group of multiple frequencies used to indicate the current breathing feature. Wherein, the above-mentioned target breathing features include at least one of the following: 1) the frequencies corresponding to the first M peaks of RSSI in the frequency domain; 2) the frequencies corresponding to the first M peaks of CSI in the frequency domain; The weight is set to be the frequency obtained by calculating the frequencies corresponding to the first M peaks of the RSSI in the frequency domain and the frequencies corresponding to the first M peaks of the CSI in the frequency domain.

That is to say, in this embodiment, the target respiratory feature can be obtained solely according to the frequency corresponding to the peak value of the RSSI in the frequency domain, or the target respiratory feature can be obtained solely according to the frequency corresponding to the peak value of the CSI in the frequency domain , and the frequency corresponding to the peak value of RSSI and CSI in the frequency domain can also be combined to obtain the target respiratory feature. For example, the way of combining RSSI and CSI may be, but not limited to, calculate and acquire target respiratory features after the combination of the two according to different pre-allocated weights.

Wherein, it should be noted that, in the way of combining RSSI and CSI provided in the above-mentioned embodiment to obtain the target respiratory characteristics, the above-mentioned combination of RSSI and CSI is just an example, which is not limited in this embodiment. Combining the two types of information according to mathematical calculations to represent breathing features can be included in the concept of the embodiments of the present invention.

Through the embodiments provided in this application, by acquiring the signal strength indication information RSSI and/or channel state information CSI of the wireless signal, the target breathing feature in the first identity feature is extracted according to the RSSI and/or CSI, so as to achieve accurate breathing according to the breathing feature. Quickly determine whether to passively unlock the terminal without actively inputting authentication information such as passwords, so as to reduce the authentication time of the terminal, thereby achieving the effect of improving the efficiency of terminal unlocking.

As an alternative,

1) The extraction module includes: (1) a conversion submodule, for converting RSSI and/or CSI in the time domain, to obtain RSSI and/or CSI in the frequency domain; (2) a first acquisition submodule, for Obtain the target respiratory feature according to the frequency corresponding to the peak value of RSSI and/or CSI in the frequency domain;

2) The first unlocking unit includes: (1) a first judging module, used to judge whether the deviation between the target breathing characteristic and the preset breathing characteristic is smaller than a first predetermined threshold; (2) the first unlocking module, using When the deviation between the target breathing characteristic and the preset breathing characteristic is smaller than a first predetermined threshold, the terminal is unlocked.

Optionally, in this embodiment, acquiring the target respiratory feature according to the frequency corresponding to the peak value of RSSI and/or CSI in the frequency domain includes:

1) The frequency corresponding to the maximum peak value in the frequency domain is set as the target respiratory frequency in the target respiratory feature;

2) Obtain the frequencies corresponding to the first M peaks in the frequency domain, and use the frequencies corresponding to the first M peaks as the target respiratory feature.

Optionally, in this embodiment, the deviation between the target breathing characteristic and the preset breathing characteristic may include but not limited to at least one of the following: the difference between the target breathing characteristic and the preset breathing characteristic value, the squared difference between the target breath signature and the preset breath signature. It should be noted that the deviation between the target breathing feature and the preset breathing feature can also be obtained by other calculation methods used to indicate the difference between the two, the above is just an example, and in this embodiment This does not make any restrictions.

Specifically combined with the example shown in Figure 4, assuming that the CSI of the current wireless signal is obtained, the CSI within 60s in the time domain (as shown in Figure 4(a)) is converted to obtain the CSI in the frequency domain (as shown in Figure 4(a) b) shown). Further, assuming that the frequency corresponding to the maximum peak value of CSI in the frequency domain is set as the target respiration frequency, then in the process of determining whether to unlock the terminal by comparing the deviation between the target respiration characteristics and the preset respiration characteristics , it may be determined whether to unlock the terminal by comparing the deviation between the target breathing frequency in the target breathing feature and the preset breathing frequency in the preset breathing feature. As shown in Figure 4(b), assuming that the maximum peak value appears at the 37th position, it means that 37 breaths have been taken within 60s, and the target breathing rate can be obtained as 60/37=1.6s. Further, assuming that the preset breathing frequency is 1.5s, the difference between the target breathing frequency and the preset breathing frequency is 0.1s, which is less than the first predetermined threshold of 0.2s, and it is judged that the target breathing characteristic is different from the preset breathing If the deviation between the two features is smaller than the first predetermined threshold, the terminal can be unlocked.

For another example, if it is assumed that the frequency corresponding to the first M peaks of CSI in the frequency domain is used as the target breathing feature, then it is determined whether to unlock the terminal by comparing the deviation between the target breathing feature and the preset breathing feature. During the process, it may be determined whether to unlock the terminal by comparing the deviation between the frequency in the target breathing feature and the preset breathing frequency. For example, M differences between each frequency in the target breathing feature and a preset breathing frequency may be obtained, but not limited to, and a square difference is calculated, which is used as a deviation between the two. Wherein, the aforementioned preset breathing frequency may be one frequency value, or M frequency values may be set correspondingly, which is not limited in this embodiment.

It should be noted that, in this embodiment, for the manner in which the frequency corresponding to the first M peaks is used as the target respiratory characteristic, the manner of calculating the deviation may also include other calculation manners. The foregoing is only an example, and no limitation is set in this embodiment.

Through the embodiment provided by this application, the target respiratory frequency in the target respiratory feature is acquired according to the frequency corresponding to the peak value of RSSI and/or CSI in the frequency domain, so as to realize the comparison between the target respiratory frequency and the preset respiratory frequency Whether the deviation between them is less than the first predetermined threshold is used to determine whether the first identity feature satisfies the first predetermined condition, so as to realize the authentication of the terminal in the static state according to the first identity feature, so as to reduce the authentication time and improve the unlocking of the terminal. efficiency.

As an optional solution, the second unlocking unit includes at least one of the following:

1) The second acquisition module is used to acquire the movement characteristics in the second identity characteristics measured by the acceleration sensor in the terminal, wherein the movement characteristics include at least one of the following: pace, pace, step width;

2) A third acquiring module, configured to acquire an input feature in the second identity feature measured by the angular velocity sensor in the terminal, wherein the input feature is used to indicate an input method when performing an input operation.

Optionally, in this embodiment, but not limited to, the motion feature in the second identity feature may be extracted according to the data in the time domain and the converted data in the frequency domain measured by the acceleration sensor. That is to say, according to the data collected by the acceleration sensor, the acceleration of movement in various directions is judged, so as to restore various movement characteristics such as the current stride frequency, pace speed, and stride width.

For example, assuming that the acceleration sensor input in the current terminal is a three-axis acceleration signal, the current step width, pace, etc. can be obtained through the signals output by the above three axes in the time domain, and the step frequency can be obtained through the signals output in the frequency domain. The foregoing is only an example, and no limitation is set in this embodiment.

Optionally, in this embodiment, the foregoing angular velocity sensor may include, but is not limited to, a gyroscope within the terminal. That is to say, the input feature in the second identity feature is acquired by using the gyroscope to detect the flip angle of the terminal at various angles when the input operation is performed, so as to obtain the current input mode when the input operation is performed.

It should be noted that, in this embodiment, when an input operation is performed, the terminal will slightly flip at various angles, and these flips can be detected by the gyroscope. That is to say, by obtaining the data detected by the gyroscope, information such as the frequency, speed, and severity of the input text during the current input operation can be restored, so as to realize the use of the input method to judge whether it is consistent with the preset input method. The customary input method is used to realize the unlocking and authentication of the terminal without obtaining the actual content of the input, avoiding the information used for authentication from being leaked, and thus improving the security of terminal unlocking.

Through the embodiments provided in this application, the terminal is authenticated and unlocked through the motion feature and input feature in the second identity feature, which not only ensures the efficiency of unlocking, but also improves the security of terminal unlocking.

As an optional solution, the third acquisition module includes:

1) The second acquisition sub-module is used to acquire the input feature measured by the angular velocity sensor when it is detected that the terminal is in a non-stationary state and the acceleration sensor has not measured the motion feature.

Optionally, in this embodiment, the application scenario of using the angular velocity sensor to measure the input feature may include but not limited to at least one of the following:

1) When it is detected that the terminal is in a non-stationary state and the acceleration sensor does not measure the motion feature, acquire the input feature measured by the angular velocity sensor. For example, as shown in FIG. 3 , during normal interaction between the user and the terminal, as a separate unlocking manner, an input feature is acquired through an angular velocity sensor.

2) When the current state of the terminal cannot be detected, the input characteristics measured by the angular velocity sensor are acquired. For example, as shown in FIG. 3 , in the case where passive unlocking (that is, using breathing and motion features to unlock) fails, the terminal can also be actively unlocked by acquiring input features through an angular velocity sensor.

Through the embodiments provided in this application, the method of unlocking the terminal through the acquired input characteristics measured by the angular velocity sensor can be used as an independent authentication method alone, or as a supplementary method to passive unlocking, so as to realize The active unlocking of the terminal ensures that users can unlock and use the terminal in time, avoiding the problem of prolonging the authentication time caused by repeated authentication due to unlocking failure, and thus achieving the effect of improving unlocking efficiency. Furthermore, by actively unlocking without obtaining input content, the security of terminal unlocking will be further ensured.

As an optional solution, the third acquisition module includes:

1) The display sub-module is used to display prompt information on the terminal, wherein the prompt information is used to prompt acquisition of predetermined text, and the predetermined text is randomly generated verification text for unlocking;

2) The third acquisition sub-module is used to acquire the input features measured by the angular velocity sensor during the process of acquiring the predetermined text.

Specifically, the following examples are used for description. For example, as shown in FIG. 5 , a pop-up window on the terminal displays prompt information for prompting to obtain predetermined text: "Please enter the following text:", such as "verification information". Wherein, the above predetermined text (that is, "verification information) may be, but not limited to, a piece of randomly generated verification text for unlocking, rather than a password set in advance. When entering the predetermined text currently prompted, the gyroscope in the terminal The input feature will be obtained and compared with the preset input feature to determine whether it is a legitimate user and achieve the purpose of identity authentication.

Through the embodiment provided by this application, the predetermined text is obtained by displaying prompt information on the terminal, so that the angular velocity sensor is used to obtain the input feature during the process of obtaining the predetermined text, so as to achieve the effect of actively unlocking and authenticating the terminal.

As an alternative,

1) The third acquisition module includes: (1) a fourth acquisition submodule, configured to acquire input parameters measured by the angular velocity sensor, wherein the input parameters include at least one of the following: input force, input displacement, and input frequency;

2) The second unlocking unit includes: (1) a second judging module for judging whether the measured input parameters match the corresponding preset input parameters; (2) a second unlocking module for judging whether the matched When the number of parameters reaches the second predetermined threshold, it is determined that the second predetermined condition is met, and the terminal is unlocked.

It should be noted that, in this embodiment, the above-mentioned input force can be directly obtained by, but not limited to, the flip angle measured by the angular velocity sensor; the above-mentioned input displacement can be calculated by, but not limited to, the flip angle and time measured by the angular velocity sensor in the time domain obtained; the above input frequency can be obtained, but not limited to, by the frequency corresponding to the peak value measured by the angular velocity sensor in the frequency domain.

Optionally, in this embodiment, the second predetermined threshold may be set to different values according to different measurement accuracies but not limited to. Wherein, the larger the second predetermined threshold is, the higher the measurement accuracy is. That is to say, here the input feature includes a plurality of input parameters. After comparing and matching the above-mentioned plurality of input parameters, if it is determined that the number of matched parameters reaches the second predetermined threshold, it means that the currently measured first The input features in the two identity features meet the second predetermined condition, and the terminal can be unlocked.

Optionally, in this embodiment, for each predetermined character, the input force and the input displacement may be respectively acquired once, but not limited to. For example, assuming that the predetermined text is "verification information", the input force and input displacement measured by the angular velocity sensor respectively when the characters "verify", "certificate", "xin" and "information" are input can be obtained respectively. Further, combined with the input frequency acquired during the input process, a comprehensive judgment may be made on the input features of multiple predetermined characters to determine whether to unlock the terminal.

Through the embodiment provided by this application, by acquiring the input parameters measured by the angular velocity sensor, and respectively judging whether the measured input parameters match the corresponding preset input parameters; When the threshold is exceeded, the terminal is actively unlocked to achieve the purpose of ensuring the security of unlocking.

As an optional solution, the fourth acquisition submodule acquires the input parameters measured by the angular velocity sensor through the following steps:

S1, according to the rotational angular velocity measured by the angular velocity sensor in the time domain, the input strength and input displacement in the input feature are obtained;

S2, converting the rotational angular velocity in the time domain to obtain the rotational angular velocity in the frequency domain;

S3. Obtain the input frequency in the input feature according to the frequency corresponding to the peak value of the rotational angular velocity in the frequency domain.

Specifically combined with the following examples for illustration, steps S602-S614 shown in Figure 6, obtain the three-axis gyroscope signal in the time domain, and then perform deviation correction and filtering processing. On the one hand, after extracting the time domain features, the input features at the time of input can be obtained The input strength and input displacement in the input; on the other hand, after performing Fourier transformation, after extracting the frequency domain features, the input frequency in the input features can be obtained.

It should be noted that the above steps S606-S608 and the step numbers in steps S610-S614 are only for distinguishing, and do not limit the sequence of execution.

It should be noted that since the input force and input displacement can be obtained separately for each predetermined character, in this embodiment, the input force and input displacement in the input feature obtained in the time domain may include but not limited to at least one of the following: The input force and the input displacement are obtained according to the maximum peak value, the input force and the input displacement are obtained according to the first peak value, and the average input force and the average input displacement of multiple predetermined characters are obtained. The foregoing is only an example, and no limitation is set in this embodiment.

For example, assume that the input force and the input displacement are obtained according to the first peak value (ie, the corresponding peak value when the first predetermined character is input). As shown in FIG. 7 , the angular velocity measured by the gyroscope in the time domain is shown, and the input strength can be represented by the amplitude of the first peak in the time domain signal shown in FIG. 7 , for example, 1.8. In addition, the input displacement can be represented by the calculation result after calculating the first peak value and the corresponding time in the time domain signal shown in FIG. 7 , for example, 2*1.8=3.6.

It should be noted that the data measured by the above-mentioned angular velocity sensor in the time domain can be used, but not limited to, to represent input force and input displacement, and these values do not have specific physical units.

For another example, after converting the above-mentioned rotational angular velocity in the time domain to obtain the rotational angular velocity in the frequency domain, the input frequency can be obtained according to the frequency corresponding to the peak value in the frequency domain. The process will not be repeated in this embodiment.

Through the embodiments provided by this application, the input features are obtained according to the input parameters measured by the angular velocity sensor in the time domain and the frequency domain, so as to realize whether to use the input features used to indicate the input mode during the input process to determine whether to perform active actions on the terminal. Unlock without obtaining the input content, thereby achieving the effect of improving the security of terminal unlocking.

As an optional solution, the second judging module includes:

1) The first judging submodule is used to judge whether the deviation between the measured input strength and the corresponding preset input strength is smaller than the third predetermined threshold;

2) The second judging submodule is used to judge whether the deviation between the measured input displacement and the corresponding preset input displacement is smaller than the fourth predetermined threshold; and

3) A third judging submodule, configured to judge whether the deviation between the measured input frequency and the corresponding preset input frequency is smaller than a fifth predetermined threshold.

Optionally, in this embodiment, the above-mentioned third predetermined threshold can be set to different values according to different precision requirements; the above-mentioned fourth predetermined threshold can be set to different values according to different precision requirements; according to different precision requirements It is required that the above-mentioned fifth predetermined threshold can be set to different values.

Optionally, in this embodiment, the deviation between the measured input parameter and the preset input parameter may include but not limited to at least one of the following: a difference between the two, a square difference between the two . It should be noted that the deviation between the two may also be obtained through other calculation methods used to indicate the difference between the two, and the above is only an example, which is not limited in this embodiment.

Through the embodiments provided in the present application, the number of matched parameters is obtained by separately judging whether the measured input parameters match the corresponding preset input parameters, so as to realize accurate judgment on whether to unlock the terminal.

Example 3

According to an embodiment of the present invention, a terminal for implementing the above method for unlocking a terminal is also provided. As shown in FIG. 9, the terminal includes:

1) The communication interface 902 is set to obtain the current state of the terminal in the lock screen state;

2) The processor 904 is connected to the communication interface 902, and is configured to extract the first identity feature according to the wireless signal currently connected to the terminal when the terminal is in a static state, and unlock the terminal when the first identity feature satisfies the first predetermined condition ; When the terminal is in a non-stationary state, acquire a second identity feature measured by a sensor in the terminal, and unlock the terminal when the second identity feature meets a second predetermined condition.

3) The memory 906 is connected to the communication interface 902 and the processor 904 and configured to store the first identity feature and the second identity feature.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in Embodiment 1 and Embodiment 2 above, and details will not be repeated here in this embodiment.

Example 4

The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the foregoing storage medium may be located in at least one network device among multiple network devices in the network.

Optionally, in this embodiment, the storage medium is configured to store program codes for performing the following steps:

S1, detecting the current state of the terminal in the lock screen state;

S2, when it is detected that the terminal is in a static state, extracting a first identity feature according to the wireless signal currently connected to the terminal, and unlocking the terminal when the first identity feature satisfies a first predetermined condition;

S3. When it is detected that the terminal is in a non-stationary state, acquire a second identity feature measured by a sensor in the terminal, and unlock the terminal when the second identity feature satisfies a second predetermined condition.

Optionally, in this embodiment, the above-mentioned storage medium may include but not limited to: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk Various media that can store program codes such as discs or optical discs.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in Embodiment 1 and Embodiment 2 above, and details will not be repeated here in this embodiment.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

If the integrated units in the above embodiments are realized in the form of software function units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium. Several instructions are included to make one or more computer devices (which may be personal computers, servers or network devices, etc.) execute all or part of the steps of the methods described in the various embodiments of the present invention.

In the above-mentioned embodiments of the present invention, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. Wherein, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or can be Integrate into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

The above is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the present invention. It should be regarded as the protection scope of the present invention.

Claims (18)

1. A method for unlocking a terminal, comprising: Detect the current state of the terminal in the lock screen state; When it is detected that the terminal is in a static state, extracting a first identity feature according to the wireless signal currently connected to the terminal, and unlocking the terminal when the first identity feature satisfies a first predetermined condition, wherein the The first identity feature includes a target breathing feature; When it is detected that the terminal is in a non-stationary state, acquiring a second identity feature measured by a sensor in the terminal, and unlocking the terminal when the second identity feature satisfies a second predetermined condition. 2. The method according to claim 1, wherein the extracting the first identity feature according to the wireless signal currently connected to the terminal comprises: Acquire signal strength indication information RSSI and/or channel state information CSI of the wireless signal; Extracting a target respiratory feature in the first identity feature according to the RSSI and/or the CSI. 3. The method of claim 2, wherein, The extracting the target respiratory feature in the first identity feature according to the RSSI and/or the CSI includes: converting the RSSI and/or the CSI in the time domain to obtain the RSSI and/or the CSI; acquiring the target respiratory feature according to a frequency corresponding to a peak value of the RSSI and/or the CSI in the frequency domain; The unlocking the terminal when the first identity feature satisfies a first predetermined condition includes: judging whether the deviation between the target breathing feature and a preset breathing feature is smaller than a first predetermined threshold; When the deviation between the target breathing characteristic and the preset breathing characteristic is smaller than the first predetermined threshold, the terminal is unlocked. 4. The method according to claim 1, wherein said obtaining the second identity characteristic measured by the sensor in the terminal comprises at least one of the following: Acquiring motion features in the second identity feature measured by the acceleration sensor in the terminal, wherein the motion features include at least one of the following: pace, pace frequency, and pace width; Acquiring an input feature in the second identity feature measured by an angular velocity sensor in the terminal, where the input feature is used to indicate an input method when an input operation is performed. 5. The method according to claim 4, wherein the acquiring the input features in the second identity features measured by the angular velocity sensor in the terminal comprises: When it is detected that the terminal is in the non-stationary state and the acceleration sensor does not measure the motion feature, the input feature measured by the angular velocity sensor is acquired. 6. The method according to claim 4, wherein the acquiring the input features in the second identity features measured by the angular velocity sensor in the terminal comprises: Displaying prompt information on the terminal, wherein the prompt information is used to prompt acquisition of predetermined text, and the predetermined text is randomly generated verification text for unlocking; During the process of acquiring the predetermined text, the input feature measured by the angular velocity sensor is acquired. 7. The method of claim 4, wherein, The acquiring the input feature in the second identity feature measured by the angular velocity sensor in the terminal includes: acquiring the input parameter measured by the angular velocity sensor, wherein the input parameter includes at least one of the following: input force , input displacement, input frequency; The unlocking the terminal when the second identity feature satisfies the second predetermined condition includes: separately judging whether the measured input parameters match the corresponding preset input parameters; When the second predetermined threshold is reached, it is determined that the second predetermined condition is met, and the terminal is unlocked. 8. The method according to claim 7, wherein said obtaining the input parameters measured by said angular velocity sensor comprises: Acquiring the input strength and input displacement in the input feature according to the rotational angular velocity measured by the angular velocity sensor in the time domain; converting the rotational angular velocity in the time domain to obtain the rotational angular velocity in the frequency domain; The input frequency in the input feature is obtained according to the frequency corresponding to the peak value of the rotational angular velocity in the frequency domain. 9. The method according to claim 7, wherein said respectively determining whether the measured input parameters match the corresponding preset input parameters comprises: judging whether the deviation between the measured input strength and the corresponding preset input strength is smaller than a third predetermined threshold; judging whether the deviation between the measured input displacement and the corresponding preset input displacement is smaller than a fourth predetermined threshold; and It is judged whether the deviation between the measured input frequency and the corresponding preset input frequency is smaller than a fifth predetermined threshold. 10. A device for unlocking a terminal, comprising: The detection unit is used to detect the current state of the terminal in the lock screen state; The first unlocking unit is configured to extract a first identity feature according to the wireless signal to which the terminal is currently connected when it is detected that the terminal is in a static state, and when the first identity feature satisfies a first predetermined condition, The terminal is unlocked, wherein the first identity feature includes a target breathing feature; The second unlocking unit is configured to obtain a second identity feature measured by a sensor in the terminal when it is detected that the terminal is in a non-stationary state, and to unlock the terminal when the second identity feature satisfies a second predetermined condition The terminal is unlocked. 11. The device according to claim 10, wherein the first unlocking unit comprises: A first acquiring module, configured to acquire signal strength indication information RSSI and/or channel state information CSI of the wireless signal; An extraction module, configured to extract a target respiratory feature in the first identity feature according to the RSSI and/or the CSI. 12. The apparatus of claim 11, wherein: The extraction module includes: a conversion submodule, configured to convert the RSSI and/or the CSI in the time domain to obtain the RSSI and/or the CSI in the frequency domain; a first acquisition submodule, Obtaining the target respiratory feature according to the frequency corresponding to the peak value of the RSSI and/or the CSI in the frequency domain; The first unlocking unit includes: a first judging module, configured to judge whether the deviation between the target breathing characteristic and a preset breathing characteristic is smaller than a first predetermined threshold; a first unlocking module, configured to When the deviation between the target breathing characteristic and the preset breathing characteristic is smaller than the first predetermined threshold, the terminal is unlocked. 13. The device according to claim 10, wherein the second unlocking unit comprises at least one of the following: The second acquisition module is configured to acquire the movement characteristics of the second identity characteristics measured by the acceleration sensor in the terminal, wherein the movement characteristics include at least one of the following: pace, pace frequency, and pace width; A third acquiring module, configured to acquire an input feature in the second identity feature measured by an angular velocity sensor in the terminal, wherein the input feature is used to indicate an input method when an input operation is performed. 14. The device according to claim 13, wherein the third acquiring module comprises: The second acquiring submodule is configured to acquire the input feature measured by the angular velocity sensor when it is detected that the terminal is in the non-stationary state and the acceleration sensor does not measure the motion feature. 15. The device according to claim 13, wherein the third acquiring module comprises: The display submodule is configured to display prompt information on the terminal, wherein the prompt information is used to prompt acquisition of predetermined text, and the predetermined text is randomly generated verification text for unlocking; The third acquiring submodule is configured to acquire the input feature measured by the angular velocity sensor during the process of acquiring the predetermined text. 16. The apparatus of claim 13, wherein: The third acquisition module includes: a fourth acquisition submodule, configured to acquire input parameters measured by the angular velocity sensor, wherein the input parameters include at least one of the following: input force, input displacement, and input frequency; The second unlocking unit includes: a second judging module, configured to respectively judge whether the measured input parameters match corresponding preset input parameters; a second unlocking module, configured to judge that the number of matched parameters reaches When the second predetermined threshold is reached, it is determined that the second predetermined condition is met, and the terminal is unlocked. 17. The device according to claim 16, wherein the fourth acquisition submodule acquires the input parameters measured by the angular velocity sensor through the following steps comprising: Acquiring the input strength and input displacement in the input feature according to the rotational angular velocity measured by the angular velocity sensor in the time domain; converting the rotational angular velocity in the time domain to obtain the rotational angular velocity in the frequency domain; The input frequency in the input feature is obtained according to the frequency corresponding to the peak value of the rotational angular velocity in the frequency domain. 18. The device according to claim 16, wherein the second judging module comprises: The first judging submodule is used to judge whether the deviation between the measured input strength and the corresponding preset input strength is smaller than a third predetermined threshold; The second judging submodule is used to judge whether the deviation between the measured input displacement and the corresponding preset input displacement is smaller than a fourth predetermined threshold; and A third judging submodule, configured to judge whether the deviation between the measured input frequency and the corresponding preset input frequency is smaller than a fifth predetermined threshold.