CN111028405B - Visitor face recognition passing method and system based on intelligent terminal - Google Patents
Visitor face recognition passing method and system based on intelligent terminal Download PDFInfo
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- CN111028405B CN111028405B CN201911360410.6A CN201911360410A CN111028405B CN 111028405 B CN111028405 B CN 111028405B CN 201911360410 A CN201911360410 A CN 201911360410A CN 111028405 B CN111028405 B CN 111028405B
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- 238000013459 approach Methods 0.000 claims description 9
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Abstract
The invention relates to a visitor face identification passing method and a visitor face identification passing system based on a smart terminal, wherein in the method, a user inputs visitor information on the smart terminal, the smart terminal sends the visitor information and an encryption rule to a cloud server, the cloud server sends a face image and the encryption rule of a visitor to an access controller which can be passed by the visitor according to the passing authority in the visitor information, the access controller encrypts the face image according to the encryption rule and collects the face image, and the access controller compares the collected face image with a prestored face image; if the collected face image is a face image prestored in an image library, the access controller is unlocked, and by adopting the identification passing method, on one hand, manual registration is not needed, and the registration time and the labor cost are saved; on the other hand, the identity information of the visitor can be effectively protected after encryption; on the other hand, the intelligent terminal user can modify visitor information and authority in real time on the intelligent terminal, and the modification is convenient and fast and the response speed is high.
Description
Technical Field
The invention relates to the technical field of visitor identification, in particular to a visitor face identification passing method and system based on an intelligent terminal.
Background
In order to ensure normal in-out order, the visitor identity needs to be confirmed when visiting. In daily life, the office places mostly adopt a manual mode to confirm and release the identity of the visitor. Specifically, when the visitor visits, the visitor needs to show the certificate to the entrance guard, information such as the unit, the number of visitors and the name of the visitor is filled in the registration form, the entrance guard on duty inputs the visitor information into the visitor management system, a temporary entrance guard card is issued to the visitor, and after the visitor finishes visiting, the temporary entrance guard card is returned to the entrance guard.
The adoption of the method has the following defects: firstly, the workload of the entrance guard is increased; secondly, the manual filling and registration takes time; thirdly, the condition that the identity information of the visitor is leaked easily occurs. Therefore, there is still a need for further improvement of the visitor identification passing mode to solve the above-mentioned shortcomings.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a visitor face recognition passing method based on a smart terminal and a visitor face recognition passing system based on a smart terminal, aiming at the above defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
on one hand, the visitor face recognition passing method based on the intelligent terminal is provided, and comprises the following steps:
the method comprises the steps that a user inputs visitor information on an intelligent terminal; the visitor information comprises a face image of a visitor and the passing authority of the visitor;
after receiving visitor information input by a user, the intelligent terminal sends the visitor information and a pre-stored encryption rule for encrypting the visitor information to the cloud server;
the cloud server sends the face image and the encryption rule of the visitor to an access controller through which the visitor can pass according to the passing authority in the visitor information;
the entrance guard device encrypts the face image according to an encryption rule and collects the face image of the visitor;
the access controller compares the collected face image with a face image prestored in an image library; the face image prestored in the door controller image library is originated from the cloud server; if the collected face image is a face image prestored in an image library, unlocking the access controller; if the collected face image is not the face image prestored in the image library, the access controller is not unlocked and prompts the visitor that the visitor has no access authority
On the other hand, a visitor face recognition passing system based on an intelligent terminal is provided, and the visitor face recognition passing method is based on the visitor face recognition passing system, wherein the system comprises:
the input unit is used for receiving visitor information input by a user;
the system comprises a first sending unit, a second sending unit and a control unit, wherein the first sending unit is used for sending visitor information and a pre-stored encryption rule used for encrypting the visitor information;
the distribution unit is used for sending the face image and the encryption rule of the visitor to the access controller which can be used for the visitor to pass according to the passing authority in the visitor information;
the encryption unit is used for encrypting the face image according to an encryption rule;
the first acquisition unit is used for acquiring a face image of a visitor;
the comparison unit is used for comparing the collected face image with a face image prestored in an image library;
the unlocking unit is used for unlocking;
and the prompting unit is used for prompting that the visitor has no access right.
The invention has the beneficial effects that: the method comprises the steps that a user inputs visitor information on a smart terminal, the smart terminal sends the visitor information and a prestored encryption rule for encrypting the visitor information to a cloud server, the cloud server sends a face image and the encryption rule of a visitor to an access controller which can be passed by the visitor according to the passing authority in the visitor information, the access controller encrypts the face image according to the encryption rule and collects the face image of the visitor, and the access controller compares the collected face image with a face image prestored in an image library; if the collected face image is a face image prestored in an image library, unlocking the door access controller; if the collected face image is not the face image prestored in the image library, the access controller is not unlocked and prompts that the visitor has no access right, and on one hand, the identification passing method is adopted, so that manual registration is not needed, and the registration time and the labor cost are saved; on the other hand, the identity information of the visitor can be effectively protected after encryption; on the other hand, the intelligent terminal user can modify visitor information and authority in real time on the intelligent terminal, and the modification is convenient and fast and the response speed is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
fig. 1 is a flowchart illustrating an implementation of a visitor face recognition passing method based on an intelligent terminal according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a visitor face recognition passing method based on an intelligent terminal according to a second embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a visitor face recognition passing method based on an intelligent terminal according to a second embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a visitor face recognition passing method based on an intelligent terminal according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a visitor face recognition passing system based on a smart terminal according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example one
The embodiment provides a visitor face recognition passing method based on an intelligent terminal, as shown in fig. 1, including the following steps:
step S101: the method comprises the steps that a user inputs visitor information on an intelligent terminal; the visitor information comprises a face image of a visitor and the passing authority of the visitor.
In this embodiment, the smart terminal is preferably a mobile phone or a tablet computer.
In the embodiment, the face image is used as the primary visitor information, and the visitor does not need to contact with the identifier when subsequent identification is carried out, so that the biological information leakage is less, and the safety is better.
In this embodiment, the right of passage mainly includes two parts: the first is a region where communication is possible, and the second is a period where communication is possible. The passable areas mainly consider that different office workers in each unit can work in different office areas, and through setting the passable areas, personalized permission setting can be carried out on visitors with different identities, so that better pertinence and security are achieved; the passable time interval mainly considers that the personnel of passing in and out not include this unit personnel and also include this unit personnel, and this unit personnel's passable time interval can be longer than this unit personnel of non-, through setting up passable time interval, can carry out individualized authority setting to the personnel of passing in and out of different identities to there are better pertinence and security protection nature.
In this embodiment, the information content of the visitor information may be increased according to actual needs, for example, the information content may further include one or any combination of the name of the visitor, the mobile phone number of the visitor, the name of the company where the visitor is located, and the position of the visitor.
Step S102: after visitor information input by a user is received, the intelligent terminal sends the visitor information and a pre-stored encryption rule for encrypting the visitor information to the cloud server.
Step S103: and the cloud server sends the face image of the visitor and the encryption rule to the access controller which can be passed by the visitor according to the passing authority in the visitor information.
In this embodiment, it is considered that the door access device can be provided in a plurality of numbers, and the visiting person does not necessarily have access rights in each area. Therefore, the cloud server can carry out targeted forwarding when sending information, namely, the access controller where the passable area is located is extracted according to the passing authority in the visitor information, and only information forwarding is carried out on the passable access controller after confirmation, so that the data transmission quantity can be reduced, and the access controller does not need to screen and examine the received data.
Step S104: and the entrance guard device encrypts the face image according to an encryption rule and collects the face image of the visitor.
In this embodiment, encrypt the face image, can avoid other people to look over the face image that prestores on the entrance guard at will, avoid revealing of visitor's identity information.
Preferably, before the face image of the visitor is collected, whether a human body approaches is detected, and if the human body approaches, the access controller is triggered to collect the face image; if no human body is close to the entrance guard, the entrance guard does not collect the face image, so that the entrance guard is prevented from being in a collection state for a long time, and the reduction of power consumption is facilitated.
Preferably, the current time is detected before the step of detecting whether the human body approaches, and if the current time is not within the preset detection time period, whether the human body approaches is not detected; and if the current time is within a preset detection time period, triggering human body detection. The preset detection time interval is a working time interval which accords with human habits, such as 6:00-20:00, the entrance outside the detection time interval is in an abnormal condition, and the entrance guard cannot be unlocked, so that the current time is detected first, useless acquisition and useless comparison can be avoided, and the power consumption is reduced.
Preferably, before the step of collecting the face image of the visitor, the illumination intensity of the current environment is detected, if the current illumination intensity is smaller than a preset illumination intensity threshold, it is indicated that the light condition of the current environment is not good, and light supplement is required to be performed in order to collect a clearer face image; if the current illumination intensity is not less than the preset illumination intensity threshold value, the light condition of the current environment is good, the requirement of collecting clear face images can be met, and light is not supplemented. Therefore, the acquisition effect of the face image can be ensured by detecting the illumination intensity and performing light supplement timely.
Step S105: the access controller compares the collected face image with a face image prestored in an image library; the face image prestored in the door controller image library is originated from the cloud server; if the collected face image is a face image prestored in an image library, unlocking the door access controller; and if the acquired face image is not the face image prestored in the image library, the access controller is not unlocked and prompts that the visitor has no access right.
Preferably, after the step that the door access device is not unlocked, the collected face images and the collection time corresponding to the face images are sent to the cloud server, abnormal conditions are recorded at any time, and a user can conveniently check the abnormal conditions and abnormal personnel.
In the embodiment of the invention, a user inputs visitor information into an intelligent terminal, the intelligent terminal sends the visitor information and a prestored encryption rule for encrypting the visitor information to a cloud server, the cloud server sends a face image and an encryption rule of a visitor to an access controller which can be used for the visitor to pass according to a passing authority in the visitor information, the access controller encrypts the face image according to the encryption rule and collects the face image of the visitor, and the access controller compares the collected face image with a face image prestored in an image library; if the collected face image is a face image prestored in an image library, unlocking the door access controller; if the collected face image is not the face image prestored in the image library, the access controller is not unlocked and prompts that the visitor has no access right, and on one hand, the identification passing method is adopted, so that manual registration is not needed, and the registration time and the labor cost are saved; on the other hand, the identity information of the visitor can be effectively protected after encryption; on the other hand, the intelligent terminal user can modify visitor information and authority in real time on the intelligent terminal, and the modification is convenient and fast and the response speed is high.
Example two
The embodiment provides a visitor face recognition passing method based on an intelligent terminal, which comprises the following steps:
step S201: the user inputs visitor information and a digit string on the intelligent terminal; the visitor information comprises a face image of a visitor and the passing authority of the visitor.
Step S202: after receiving visitor information input by a user, the intelligent terminal sends the visitor information and a pre-stored encryption rule for encrypting the visitor information to the cloud server;
in this embodiment, the encryption rule is that the first digit of the digit string is multiplied by the last digit of the digit string in sequence, and the final result is used as the unlock password corresponding to the visitor information, so that the initially input password is not the same as the last decryption password, and even if the digit string is peeped by others when being entered, it is difficult for others to obtain the correct decryption password, and the concealment and the protection are improved.
Step S203: and the cloud server sends the face image of the visitor and the encryption rule to the access controller which can be passed by the visitor according to the passing authority in the visitor information.
Step S204: and halving the touch area of each touch digital key on the entrance guard.
In this embodiment, the halving is performed in advance, so that different areas of the same key correspond to different numbers, so as to improve the concealment of the subsequently entered decryption password.
Step S205: and the entrance guard device encrypts the face image according to an encryption rule and collects the face image of the visitor.
Step S206: after receiving the visitor information checking request, the entrance guard device changes the temperature of any sub-area of each touch digital key on the entrance guard device;
collecting the stay time of the user on each subarea;
if the residence time of the user in the sub-area exceeds a preset threshold value and the sub-area is a temperature-changing area, inputting the number associated with the sub-area as a target password;
if the target password input by the user is consistent with the unlocking password, visitor information prestored on the access controller is displayed; and if the target password input by the user is inconsistent with the unlocking password, the visitor information prestored in the access controller is not displayed.
In this embodiment, the step of changing the temperature of any sub-area of each touch numeric key on the door access device includes: any subarea of each touch digital key on the access controller is cooled, so that a user can feel temperature change, heat dissipation of the access controller is facilitated, and two purposes are achieved.
As an example one:
the touch areas of the touch numeric keys on the door controller are divided as shown in fig. 2, wherein a horizontal line L1 bisects the touch areas of the numeric keys to obtain a subarea a1 and a subarea a2, all subareas a1 are cooling areas, and all subareas a2 are normal-temperature areas;
the semiconductor refrigeration pieces are adopted for cooling, and the distribution of the semiconductor refrigeration pieces 114 is shown in figure 3;
the numbers corresponding to the sub-regions of each touch number key are shown in fig. 4;
the preset threshold value is 2S;
if the numeric string entered by the user is 1234, the final decryption password is 1 × 2 × 3 × 4 ═ 24;
the data collected were:
if the dwell time of the user finger tip in the sub-area a2 of the touch number key 3 is 1S and the dwell time in the sub-area a1 of the touch number key 3 is 2.2S, the number to be input is 2;
if the dwell time of the finger tip of the user in the sub-area A1 of the touch number key 5 is 2.3S, the number to be input is 4;
the input decryption password is 24, and the input decryption password is consistent with the decryption password after the operation of the digital string, so that the visitor information prestored in the entrance guard is displayed.
As example two:
the touch areas of the touch numeric keys on the door controller are divided as shown in fig. 2, wherein a horizontal line L1 bisects the touch areas of the numeric keys to obtain a subarea a1 and a subarea a2, all subareas a2 are cooling areas, and all subareas a1 are normal-temperature areas;
the semiconductor refrigeration pieces are adopted for cooling, and the distribution of the semiconductor refrigeration pieces 114 is shown in figure 3;
the numbers corresponding to the sub-regions of each touch number key are shown in fig. 4;
the preset threshold value is 2S;
if the numeric string entered by the user is 1234, the final decryption password is 1 × 2 × 3 × 4 ═ 24;
the data collected were:
if the dwell time of the user finger end in the sub-area A1 of the touch number key 1 is 1S and the dwell time in the sub-area A2 of the touch number key 1 is 2.2S, the number to be input is 2;
if the dwell time of the finger tip of the user in the sub-area A2 of the touch number key 3 is 2.3S, the number to be input is 4;
the input decryption password is 24, and the input decryption password is consistent with the decryption password after the operation of the digital string, so that the visitor information prestored in the entrance guard is displayed.
From the two examples above, it can be seen that:
since the numeric string entered by the end user on the terminal is not the final decryption password, even if someone peeps the numeric string entered by the user, it is impossible to confirm what the final decryption password is.
Furthermore, because the temperature change can be sensed by the user only when the user touches the key, even if the user presses the key by peeping, whether the touched sub-area is the temperature-changing area can not be confirmed, even if the touch is simulated at the appointed position, the temperature-changing area is changeable during unlocking each time, and the correct decryption password is difficult to input, so that the difficulty of the password cracking of other people can be greatly improved, the information of a visitor can be better kept secret, and the safety performance is better.
The numbers corresponding to the sub-areas can be replaced in real time according to the requirements of users.
Step S207: the access controller compares the collected face image with a face image prestored in an image library; the face image prestored in the door controller image library is originated from the cloud server; if the collected face image is a face image prestored in an image library, unlocking the door access controller; and if the acquired face image is not the face image prestored in the image library, the access controller is not unlocked and prompts that the visitor has no access right.
In the embodiment of the invention, a user inputs visitor information into an intelligent terminal, the intelligent terminal sends the visitor information and a prestored encryption rule for encrypting the visitor information to a cloud server, the cloud server sends a face image and an encryption rule of a visitor to an access controller which can be used for the visitor to pass according to a passing authority in the visitor information, the access controller encrypts the face image according to the encryption rule and collects the face image of the visitor, and the access controller compares the collected face image with a face image prestored in an image library; if the collected face image is a face image prestored in an image library, unlocking the door access controller; if the collected face image is not the face image prestored in the image library, the access controller is not unlocked and prompts that the visitor has no access right, and on one hand, the identification passing method is adopted, so that manual registration is not needed, and the registration time and the labor cost are saved; on the other hand, the identity information of the visitor can be effectively protected after encryption; on the other hand, the intelligent terminal user can modify visitor information and authority in real time on the intelligent terminal, and the modification is convenient and fast and the response speed is high.
EXAMPLE III
The embodiment of the invention provides a visitor face recognition passing system based on an intelligent terminal, and as shown in figure 5, the system comprises:
the entry unit 10 is used for receiving visitor information entered by a user;
a first transmitting unit 11, configured to transmit the visitor information and a pre-stored encryption rule for encrypting the visitor information;
the distribution unit 12 is used for sending the face image and the encryption rule of the visitor to the door access device which can be used for the visitor to pass through according to the passing authority in the visitor information;
an encryption unit 13, configured to encrypt the face image according to an encryption rule;
the first acquisition unit 14 is used for acquiring a face image of a visitor;
a comparison unit 15, configured to compare the acquired face image with a face image prestored in an image library;
an unlocking unit 16 for unlocking;
and the prompting unit 17 is used for prompting the visitor of no access right.
Preferably, as shown in fig. 5, the system further includes:
a human body detection unit 18 for detecting whether a human body approaches;
a time detection unit 19 for detecting the current time;
an illumination intensity detection unit 110 for detecting an illumination intensity of a current environment;
a light supplement unit 111 for supplementing light;
the second sending unit 112 is further configured to send the acquired face image and the acquisition time corresponding to the face image to the allocation unit;
the input unit 10 is further used for receiving a numeric string input by a user;
the dividing unit 113 is further configured to halve a touch area of each touch number key on the door controller;
the temperature changing unit 114 is further configured to change the temperature of any sub-area of each touch numeric key on the door access controller;
a second collecting unit 115, configured to collect the residence time of the user in each sub-area;
a password input unit 116 for inputting the number associated with the sub-area as a target password.
In the embodiment of the invention, a user inputs visitor information into an intelligent terminal, the intelligent terminal sends the visitor information and a prestored encryption rule for encrypting the visitor information to a cloud server, the cloud server sends a face image and an encryption rule of a visitor to an access controller which can be used for the visitor to pass according to a passing authority in the visitor information, the access controller encrypts the face image according to the encryption rule and collects the face image of the visitor, and the access controller compares the collected face image with a face image prestored in an image library; if the collected face image is a face image prestored in an image library, unlocking the door access controller; if the collected face image is not the face image prestored in the image library, the access controller is not unlocked and prompts that the visitor has no access right, and on one hand, the identification passing method is adopted, so that manual registration is not needed, and the registration time and the labor cost are saved; on the other hand, the identity information of the visitor can be effectively protected after encryption; on the other hand, the intelligent terminal user can modify visitor information and authority in real time on the intelligent terminal, and the modification is convenient and fast and the response speed is high.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. A visitor face recognition passing method based on an intelligent terminal is characterized by comprising the following steps:
the method comprises the steps that a user inputs visitor information on an intelligent terminal; the visitor information comprises a face image of a visitor and the passing authority of the visitor;
after receiving visitor information input by a user, the intelligent terminal sends the visitor information and a pre-stored encryption rule for encrypting the visitor information to the cloud server;
the cloud server sends the face image and the encryption rule of the visitor to an access controller through which the visitor can pass according to the passing authority in the visitor information;
the entrance guard device encrypts the face image according to an encryption rule and collects the face image of the visitor;
the access controller compares the collected face image with a face image prestored in an image library; the face image prestored in the door controller image library is originated from the cloud server; if the collected face image is a face image prestored in an image library, unlocking the access controller; if the collected face image is not the face image prestored in the image library, the access controller is not unlocked and prompts the visitor that the visitor has no access right;
before the step of sending, by the smart terminal, the visitor information and the pre-stored encryption rule for encrypting the visitor information to the cloud server, the method further includes:
the intelligent terminal receives a numeric string input by a user;
the encryption rule is that the first digit of the digit string is multiplied by the last digit of the digit string in sequence, and the final result is used as the unlocking password corresponding to the visitor information;
before the step of encrypting the face image by the entrance guard according to the encryption rule, the method further comprises the following steps:
halving the touch area of each touch digital key on the entrance guard;
after the step of encrypting the face image by the entrance guard according to the encryption rule, the method further comprises the following steps:
after receiving the visitor information checking request, the entrance guard device changes the temperature of any sub-area of each touch digital key on the entrance guard device;
collecting the stay time of the user on each subarea;
if the residence time of the user in the sub-area exceeds a preset threshold value and the sub-area is a temperature-changing area, inputting the number associated with the sub-area as a target password;
if the target password input by the user is consistent with the unlocking password, visitor information prestored on the access controller is displayed; and if the target password input by the user is inconsistent with the unlocking password, not displaying visitor information prestored in the access controller.
2. The visitor face recognition passing method according to claim 1, wherein the visitor information further comprises one or any combination of a name of the visitor, a mobile phone number of the visitor, a name of a company where the visitor is located, a position of the visitor.
3. The visitor face recognition passing method according to claim 1, wherein the step of collecting the face image of the visitor is preceded by the method further comprising:
detecting whether a human body approaches, and if so, triggering an access controller to acquire a human face image; and if no human body approaches, the entrance guard does not acquire the human face image.
4. The visitor face recognition passing method of claim 3, wherein before the step of detecting whether a human body is approaching, the method further comprises:
detecting the current time, and if the current time is not in a preset detection time period, not detecting whether a human body approaches; and if the current time is within a preset detection time period, triggering human body detection.
5. The visitor face recognition passing method according to claim 1, wherein the step of collecting the face image of the visitor is preceded by the method further comprising:
detecting the illumination intensity of the current environment, and if the current illumination intensity is smaller than a preset illumination intensity threshold value, supplementing light; if the current illumination intensity is not less than the preset illumination intensity threshold value, light is not supplemented.
6. The visitor face recognition passing method according to claim 1, wherein after the step of not unlocking the door access, the method further comprises:
and sending the collected face image and the collection time corresponding to the face image to the cloud server.
7. The visitor face recognition passing method according to claim 1, wherein the step of changing the temperature of any sub-area of each touch number key on the entrance guard comprises the steps of: and cooling any subarea of each touch digital key on the entrance guard.
8. A visitor face recognition passing system based on an intelligent terminal, the visitor face recognition passing method based on any one of claims 1-7, the system comprising:
the input unit is used for receiving visitor information input by a user;
the system comprises a first sending unit, a second sending unit and a control unit, wherein the first sending unit is used for sending visitor information and a pre-stored encryption rule used for encrypting the visitor information;
the distribution unit is used for sending the face image and the encryption rule of the visitor to the access controller which can be used for the visitor to pass according to the passing authority in the visitor information;
the encryption unit is used for encrypting the face image according to an encryption rule;
the first acquisition unit is used for acquiring a face image of a visitor;
the comparison unit is used for comparing the collected face image with a face image prestored in an image library;
the unlocking unit is used for unlocking;
and the prompting unit is used for prompting that the visitor has no access right.
9. The visitor face recognition passing system of claim 8, further comprising:
the human body detection unit is used for detecting whether a human body approaches;
a time detection unit for detecting a current time;
the illumination intensity detection unit is used for detecting the illumination intensity of the current environment;
the light supplementing unit is used for supplementing light;
the second sending unit is also used for sending the acquired face image and the acquisition time corresponding to the face image to the distribution unit;
the input unit is also used for receiving a numeric string input by a user;
the dividing unit is also used for halving the touch area of each touch digital key on the entrance guard;
the temperature changing unit is also used for changing the temperature of any sub-area of each touch digital key on the entrance guard;
the second acquisition unit is used for acquiring the staying time of the user on each subarea;
and a password input unit for inputting the number associated with the sub-area as a target password.
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