WO2019056293A1

WO2019056293A1 - Wearable device wearing state detection method, apparatus and wearable device

Info

Publication number: WO2019056293A1
Application number: PCT/CN2017/102903
Authority: WO
Inventors: 郭加成; 刘和兴; 赵亮; 周威
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2017-09-22
Filing date: 2017-09-22
Publication date: 2019-03-28
Also published as: CN107820410B; CN107820410A

Abstract

Disclosed is a wearing state detection method of a wearable device comprising: transmitting N kinds of lights with different wavelengths to the object to be tested; obtaining the light intensity of the reflected light corresponding to the light of each wavelength reflected by the object to be tested; if the intensity of a reflected light corresponding to the light of at least one wavelength exceeds a light intensity threshold, determining whether the relationship of the light intensities of the reflected lights corresponding to the N kinds of lights with different wavelengths matches the relationship of the light intensities of the reflected lights corresponding to the skin; and determining the wearing state of the wearable device according to the determined result. The invention may improve the accuracy of detecting the wearing state of the wearable device. Also disclosed are a wearing state detection device (100) and a wearable device.

Description

Wearing state detecting method, device and wearable device of wearable device

Technical field

The present invention relates to the field of wearable device technologies, and in particular, to a wearable state detecting method, apparatus, and wearable device for a wearable device.

Background technique

Wearable devices are the general term for applying wearable technology to intelligently design everyday wear and develop wearable smart devices, such as smart watches, smart headphones and smart bracelets. Wearable devices are typically powered by small or micro-batteries, so standby or working hours are not too long; in addition, some human-detection-related features of wearable devices, such as step counting, heart rate detection, and calorie expenditure detection, are only available. Effective data is available when the user wears it. Therefore, in order to save power and prolong the use time of the wearable device, and to improve the accuracy of the test data related to the wear, many wearable devices currently have a wear detection function, which can automatically determine the wearable state of the wearable device, and then wear according to the wearable device. State optimization related functions.

In the prior art, the wearing state detecting method of the wearable device further detects the infrared reflection original value of the human skin when detecting that the distance between the wearable device and the human body surface is not less than a threshold value when the wearable device leaves the surface of the object. The green light reflects the original value or the like to determine whether the human body wears the wearable device to improve the accuracy of the wearing state detection result of the wearable device.

However, the intensity of the reflected light (ie, the original value of the reflection) is susceptible to the anatomical structure of the skin, the distance from the light intensity detecting device to the skin, and the body shake. Therefore, the above method has a high false detection rate, which leads to wearability. The accuracy of the device wearing status detection result is not high enough.

Summary of the invention

In view of this, the present invention provides a wear state detecting method, apparatus, and wearable device for a wearable device for improving the accuracy of the wearing state detection result of the wearable device.

In order to achieve the above object, in a first aspect, the present invention provides a method for detecting a wearing state of a wearable device, including:

Transmitting N different wavelengths of light to the detected object, N being an integer greater than or equal to 2;

Obtaining a light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object;

If the light intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold, it is determined whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths conforms to the light intensity of the reflected light corresponding to the skin. Size relationship

According to the judgment result, the wearing state of the wearable device is determined.

By using the biological tissue and the non-biological tissue to have different light absorption and reflection of different wavelengths, and the same kind of characteristics of the light intensity of the reflected light of the detected object are similar, the N different wavelengths of light are emitted to the detected object, and Obtaining, according to the light intensity of the reflected light corresponding to the light reflected by the detected object, the light intensity of the reflected light corresponding to the light having the at least one wavelength exceeds the light intensity threshold, respectively, according to the light of the N different wavelengths respectively Whether the magnitude relationship of the intensity of the reflected light conforms to the magnitude relationship of the intensity of the reflected light corresponding to the skin to determine the wearing state of the wearable device, and can reduce whether the intensity of the reflected light is within a preset light intensity threshold. The false detection rate of whether the wearable device is close to the human skin, thereby improving the accuracy of the wearing state detection result of the wearable device.

As an optional implementation manner of the present invention, determining the wearing state of the wearable device according to the determination result includes:

If the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths conforms to the magnitude relationship of the light intensity of the reflected light corresponding to the skin, it is determined that the wearable device is in the wearing state.

If the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths is in accordance with the magnitude of the light intensity of the reflected light corresponding to the skin, it is determined whether the waveform of the reflected light corresponding to the light of at least one wavelength conforms to the heart rate. feature;

Determining that the wearable device is in a wearing state if the waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic;

If the waveforms of the reflected light corresponding to the light of the N different wavelengths do not conform to the heart rate characteristic, it is determined that the wearable device is in an unworn state.

When it is determined that the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths matches the light intensity of the reflected light corresponding to the skin, it is further detected whether the waveform of the light of the N different wavelengths conforms to the heart rate characteristic. Determine the wearing state of the wearable device, which can further improve wearing The accuracy of the status detection results.

If the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths does not conform to the magnitude relationship of the light intensity of the reflected light corresponding to the skin, it is determined that the wearable device is in an unworn state.

As an optional implementation manner of the present invention, the foregoing method further includes:

If the light intensity of the reflected light corresponding to the light of the N different wavelengths does not exceed the light intensity threshold, it is determined that the wearable device is in an unworn state.

As an optional implementation manner of the present invention, the light of the N different wavelengths includes at least the green light and the red light, and the relationship between the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is less than the red light. The light intensity of the reflected light corresponding to the light; or,

The light of the N different wavelengths includes at least the green light and the infrared light, and the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is smaller than the light intensity of the reflected light corresponding to the infrared light; or

The light of the N different wavelengths includes at least the green light, the red light, and the infrared light. The magnitude of the light intensity corresponding to the reflected light of the skin includes: the light intensity of the reflected light corresponding to the green light is smaller than the light intensity of the reflected light corresponding to the red light. And, the intensity of the reflected light corresponding to the green light is smaller than the intensity of the reflected light corresponding to the infrared light.

As an optional implementation manner of the present invention, before the N different wavelengths of light are emitted to the detected object, the method further includes:

Transmitting a single wavelength of light to the object to be detected;

Obtaining a light intensity of the reflected light corresponding to the light of the single wavelength after being reflected by the detected object;

Collecting the acceleration of the wearable device;

Determining whether the intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold, and whether the acceleration exceeds the acceleration threshold;

If the light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold, performing steps to emit N different wavelengths of light to the detected object;

If the intensity of the reflected light corresponding to the light of the single wavelength does not exceed the light intensity threshold and the acceleration does not exceed the acceleration threshold, it is determined that the wearable device is in an unworn state.

Determining the reflection of a single wavelength of light by first emitting light of a single wavelength to the detected object and acquiring acceleration of the wearable device before emitting N different wavelengths of light to the object to be detected When the light intensity exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold, N different wavelengths of light are emitted, thereby saving power and extending the wearable time of the wearable device.

As an alternative embodiment of the invention, the light of a single wavelength is infrared light.

By using infrared light, you can save power.

In a second aspect, an embodiment of the present invention provides a wearing state detecting apparatus, including:

The light intensity detecting module is configured to emit N different wavelengths of light to the detected object, and obtain a light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object, where N is an integer greater than or equal to 2;

a wearing state determining module, configured to determine, if the light intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold, determine whether the light intensity of the reflected light corresponding to the N different wavelengths respectively corresponds to the skin The magnitude relationship of the light intensity of the corresponding reflected light; and determining the wearing state of the wearable device according to the judgment result.

As an optional implementation manner of the present invention, the wearing state determining module is specifically configured to:

As an optional implementation manner of the present invention, the wearing state detecting device further includes:

The heart rate judging module is configured to determine whether there is light of at least one wavelength if the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths matches the light intensity of the reflected light corresponding to the skin. The waveform of the reflected light conforms to the heart rate characteristic;

The wearing state determining module is configured to determine that the wearable device is in a wearing state if the waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic;

As an optional implementation manner of the present invention, in determining the wearing state of the wearable device according to the determination result, the wearing state determining module is specifically configured to:

As an optional implementation manner of the present invention, the wearing state determining module is further configured to:

As an optional implementation manner of the present invention, the wearing state detecting device further includes: an acceleration detecting module;

Before emitting N different wavelengths of light to the detected object, the light intensity detecting module is further configured to:

Transmitting a single wavelength of light to the object to be detected;

The acceleration detecting module is configured to collect acceleration of the wearable device;

The wearing state determining module is further configured to determine that the light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold.

As an optional implementation manner of the present invention, the light intensity detecting module comprises an LED and a light detector, wherein the LED is used to emit N different wavelengths of light to the detected object, and the light detector is configured to receive light of each wavelength after being detected. The object reflects the corresponding reflected light and acquires the intensity of the reflected light.

The benefits of the wearable device provided by the above second aspect and the possible embodiments of the second aspect can be seen in the beneficial effects of the first aspect and the possible embodiments of the first aspect, and are not Let me repeat.

In a third aspect, an embodiment of the present invention provides a wearable device, comprising the wearing state detecting device according to any one of the foregoing second aspects.

The benefits of the wearable device provided by the above third aspect and the possible embodiments of the second aspect can be seen in the beneficial effects of the second aspect and the possible implementation manners of the second aspect, which are not Let me repeat.

DRAWINGS

1 is a schematic structural diagram of a light intensity detecting apparatus according to an embodiment of the present invention;

2 is a schematic diagram of relationship between light intensity of infrared reflected light and distance between skin and light intensity detecting device according to an embodiment of the present invention;

3 is a schematic diagram of relationship between light intensity of reflected light of three kinds of light and distance between the detected object and the light intensity detecting device according to an embodiment of the present invention;

4 is a schematic diagram showing another relationship between the light intensity of the reflected light of the three kinds of light and the distance between the detected object and the light intensity detecting device according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart diagram of a method for detecting a wearing state of a wearable device according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of a method for detecting a wearing state of another wearable device according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart of still another method for detecting a wearing state of a wearable device according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart diagram of still another method for detecting a wearing state of a wearable device according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart diagram of still another method for detecting a wearing state of a wearable device according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a wearing state detecting apparatus according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another wearing state detecting apparatus according to an embodiment of the present invention.

Detailed ways

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a light intensity detecting apparatus according to an embodiment of the present invention. As shown in FIG. 1 , the light intensity detecting apparatus includes a light emitting diode (LED) and a photodiode (PD). The light is emitted to the object to be detected by the LED, and the emitted light is reflected by the detected object and then received by the PD. The PD can also be replaced by another optical detector. In this embodiment, the PD is taken as an example for exemplary description.

The light emitted by the light intensity detecting device includes other visible lights such as green light, red light, and infrared light. 2 is a schematic diagram showing the relationship between the intensity of infrared reflected light and the distance between the skin and the light intensity detecting device according to an embodiment of the present invention. As shown in FIG. 2, FIG. 2 shows the wrist skin of two subjects. Different distances A graph of the intensity data of infrared reflected light. Here, the horizontal axis represents the distance between the light intensity detecting device and the skin, and the vertical axis represents the magnitude of the light intensity of the reflected light. During the test, infrared light is emitted to the same position of the wrist skin of the two subjects, and the distance between the light intensity detecting device and the skin is gradually changed, and the light intensity of the reflected light at each distance is recorded, and the subject remains during the test. Static to prevent the wrist from shaking. As can be seen from Fig. 2, in the case where the light intensity detecting device and the skin of the two subjects are the same, the measured light intensity of the infrared reflected light differs greatly. The above test is exemplified by infrared light. The light intensity characteristics of the reflected light of other light are similar to those of the infrared reflected light. When the light intensity detecting device has the same skin distance from different subjects, the final result is The measured light intensity of the reflected light differs greatly.

Therefore, in the related art, by detecting whether the intensity of the reflected light of the infrared and the green light is within a preset light intensity threshold to determine whether the wearable device is close to the human skin, and thereby determining whether the human body wears the wearable device, the method can be judged. In the process of whether the wearable device is close to the human skin, it is easy to be misdetected, and the accuracy of the wearing state detection result of the wearable device is not high enough.

3 is a schematic diagram of relationship between light intensity of reflected light of three kinds of light and distance between the detected object and the light intensity detecting device according to an embodiment of the present invention, wherein the horizontal axis represents the light intensity detecting device from a distance The number of sampling points collected in chronological order during the process of gradually approaching the skin, and the vertical axis indicates the intensity of the reflected light. As shown in Fig. 3, under certain conditions, the intensity and distance of the reflected light are not always linear. When the detected object gradually approaches the light intensity detecting device, the light intensity of the reflected light received by the PD gradually increases; When approaching a certain distance, the intensity of the reflected light has an inflection point, and thereafter the intensity of the reflected light decreases as the distance decreases. As can be seen from Fig. 3, at point P, the relationship between the intensity of the reflected light and the distance has an inflection point. It can be seen that the highest point of the light intensity of the reflected light does not represent the position closest to the skin.

In addition, as can be seen from FIG. 3, when the object is relatively close to the object to be detected, the intensity of the reflected light is significantly weaker than the highest light intensity; at this time, since the light intensity is weak and is close to the object to be detected, it is detected. Factors such as the absorption rate of the object began to play a significant role. When the object to be detected is a special object such as skin, the light intensity of the reflected light of different wavelengths is significantly different due to the difference in absorption and reflectance. 4 is a schematic diagram showing another relationship between the light intensity of the reflected light of the three kinds of light and the distance between the detected object and the light intensity detecting device according to the embodiment of the present invention, wherein the horizontal axis represents the light intensity detecting device from the far side. The number of sampling points collected in chronological order during the process of gradually approaching the non-biological tissue and then gradually approaching the skin from a distance, and the vertical axis indicates the intensity of the reflected light. As shown in Figure 4, three different wavelengths of light (such as green light, red light, and infrared light) are emitted to the skin and abiotic tissues, and the reflection of light of different wavelengths for the skin is shown. The magnitude relationship of the light intensity of the light is expressed as: the intensity of the reflected light corresponding to the green light < the intensity of the reflected light corresponding to the red light, and the intensity of the reflected light corresponding to the green light < the reflected light corresponding to the infrared light Light intensity; for non-biological tissues, the main manifestations are: the intensity of the reflected light corresponding to the green light > the intensity of the reflected light corresponding to the infrared light, and the intensity of the reflected light corresponding to the green light > the reflected light corresponding to the red light The light is strong.

Based on this, in order to improve the accuracy of the wearing state detection result of the wearable device, the embodiment of the present invention provides a wearable state detecting method, device, and wearable device, which are mainly used by using biological tissue and non-biological tissue. The difference between the light absorption and the reflection of the wavelength, the light of different wavelengths is emitted to the object to be detected, and the light intensity of the reflected light of the light of at least one wavelength reaches the light intensity threshold, and further according to the light intensity of each reflected light. The relationship distinguishes between biological tissue and non-biological tissue, thereby achieving wear state detection of the wearable device.

FIG. 5 is a schematic flowchart of a method for detecting a wearing state of a wearable device according to an embodiment of the present invention. As shown in FIG. 5, the method provided in this embodiment may include the following steps:

S101. Transmit N different wavelengths of light to the detected object.

Where N is an integer greater than or equal to 2; in a specific implementation, the size of N can be selected according to requirements, for example, N is selected to be 2 to save power; and N is selected to be 3 to improve detection accuracy. The objects to be detected include biological tissues such as skin and non-biological tissues.

Specifically, the wearable device can emit N different wavelengths of light, such as visible light such as green light, red light, and infrared light, to the detected object through the N LEDs.

S102. Acquire a light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object.

Specifically, after the light intensity detecting device emits light of different wavelengths to the detected object through the LED, the light reflected by the detected object can be received by the PD device thereon, and converted into an electrical signal and sent to the wearable device. a processor; the processor can determine the intensity of the reflected light corresponding to the light of each wavelength according to the electrical signal.

S103. If the light intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold, determine whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths conforms to the reflected light corresponding to the skin. The relationship between the magnitude of the light intensity; and based on the judgment result, the wearing state of the wearable device is determined.

The detected object is different or the distance of the detected object from the light intensity detecting device is different, and the intensity of the reflected light reflected back is different. According to the intensity of the reflected light, the type of the detected object and the detected object can be determined. The proximity of the object to the light intensity detecting device.

Specifically, when the wearable device is in an unworn state, the light intensity detecting device is not blocked by the detected object, that is, the detected object is farther from the light intensity detecting device, and the light intensity of the reflected light received by the light intensity detecting device at this time It is relatively small; when the wearable device is in the wearing state, when the light intensity detecting device is blocked by the detected object, that is, the detected object is relatively close to the light intensity detecting device, and the light intensity of the reflected light received by the light intensity detecting device at this time It will be bigger. By setting a light intensity threshold, the degree of proximity of the light intensity detecting device to the object to be detected can be determined, thereby determining the wearing state of the wearable device.

In this embodiment, after obtaining the light intensity of the corresponding reflected light after the light of each wavelength is reflected by the detected object, it is first determined whether the light intensity of each reflected light exceeds a light intensity threshold, if at least one wavelength exists. If the light intensity of the reflected light corresponding to the light exceeds the light intensity threshold, the detected object is closer to the light intensity detecting device, and the wearable device may be in a wearing state; if the N different wavelengths of light respectively correspond to the reflected light light If the intensity does not exceed the light intensity threshold, the detected object is far from the light intensity detecting device, and the wearable device is determined to be in an unworn state. The light intensity thresholds of the N different wavelengths of light may be the same, that is, the light of the N medium wavelength adopts the same light intensity threshold; the light intensity thresholds of the N different wavelengths of light may also be different, that is, the light of the N medium wavelength Different light intensity thresholds are used respectively. The value of the light intensity threshold may be determined according to the minimum value of the light intensity of the reflected light when the wearable device is in the wearing state, and the specific value is not particularly limited in this embodiment.

It can be seen from FIG. 4 that the biological tissue and the non-biological tissue have different light absorption and reflection at different wavelengths, and have certain regularity. In this embodiment, the light intensity corresponding to the reflected light corresponding to the light having the at least one wavelength is determined to exceed the light. When the threshold is strong, the wearing state of the wearable device is further determined by the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths.

Specifically, different types of detected objects (biological tissue and non-biological tissue) have different light absorption and reflection for different wavelengths, and the respective light intensity of the corresponding reflected light has different magnitude relationships, and for the same type of detected object, The magnitude of the intensity of the reflected light is similar. As shown in FIG. 4, for the skin (biological tissue), the magnitude relationship of the light intensity of the reflected light of the light of different wavelengths is expressed as: the light intensity of the reflected light corresponding to the green light < the light intensity of the reflected light corresponding to the red light, and The intensity of the reflected light corresponding to the green light <the intensity of the reflected light corresponding to the infrared light; for the non-biological tissue, the magnitude of the intensity of the reflected light of the different wavelengths is mainly expressed as: the reflected light corresponding to the green light Light intensity> The intensity of the reflected light corresponding to the infrared light, and the light intensity of the reflected light corresponding to the green light> the light intensity of the reflected light corresponding to the red light.

In this embodiment, after the light intensity of the corresponding reflected light is reflected by the detected object, the light intensity of the reflected light corresponding to the N different wavelengths can be obtained. The magnitude relationship of the light intensity of the reflected light corresponding to the skin is matched, and it is determined whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths matches the light intensity of the reflected light corresponding to the skin. As a result, the wearing state of the wearable device is determined. For example, the magnitude relationship between the light intensity of the reflected light corresponding to the light of the N different wavelengths is in accordance with the magnitude of the light intensity of the reflected light corresponding to the skin, and the wearable device is determined to be in a wearing state; otherwise, the wearable device is determined to be in an unworn state. .

The wearing state detecting method of the wearable device provided by the embodiment is different in that the light absorption and the reflection of different wavelengths are different between the biological tissue and the non-biological tissue, and the light intensity of the same type of the detected object has similar magnitude characteristics. Transmitting N different wavelengths of light to the object to be detected, and acquiring the intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object, and the intensity of the reflected light corresponding to the light having at least one wavelength exceeds When the light intensity threshold is used, it is determined whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths is in accordance with the light intensity of the reflected light corresponding to the skin; and determining the wearing state of the wearable device according to the determination result The false detection rate of whether the wearable device is close to the human skin is determined by whether the light intensity of the reflected light is within a preset light intensity threshold, and the accuracy of the wearing state detection result of the wearable device is improved.

FIG. 6 is a schematic flowchart of a method for detecting a wearing state of another wearable device according to an embodiment of the present invention. This embodiment is a specific implementation manner of step S103 in the foregoing embodiment shown in FIG. 5 . On the basis of the embodiment shown in FIG. 5, as shown in FIG. 6, in the embodiment, it is determined in step S103 whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths corresponds to the skin. Determining the relationship between the light intensity of the reflected light and determining the wearing state of the wearable device according to the judgment result may specifically include the following steps:

S201: Determine whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths conforms to the magnitude relationship of the light intensity of the reflected light corresponding to the skin; if yes, execute step S202; if no, execute step S203.

Specifically, as shown in FIG. 4, for the skin, the magnitude relationship of the light intensity of the reflected light of the different wavelengths of light is expressed as: the intensity of the reflected light corresponding to the green light < the intensity of the reflected light corresponding to the red light, and The intensity of the reflected light corresponding to the green light <the intensity of the reflected light corresponding to the infrared light. The magnitude relationship of the light intensity of the reflected light corresponding to the skin can be determined according to the relationship and the type of light selected.

Here are a few possible implementations:

The first type: the light of the N different wavelengths includes at least: green light and red light; and the relationship between the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is smaller than the reflected light corresponding to the red light Light intensity.

The second type: N different wavelengths of light include at least: green light and infrared light; and the intensity relationship of the reflected light corresponding to the skin includes: the intensity of the reflected light corresponding to the green light is smaller than the reflected light corresponding to the infrared light. Light intensity

The third type: N different wavelengths of light include at least: green light, red light, and infrared light; the magnitude of the light intensity corresponding to the reflected light of the skin includes: the intensity of the reflected light corresponding to the green light is smaller than the corresponding light of the red light The intensity of the reflected light is greater, and the intensity of the reflected light corresponding to the green light is smaller than the intensity of the reflected light corresponding to the infrared light.

It should be noted that the above description is only for illustrative purposes. N different wavelengths of light may also include other visible light, such as ultraviolet light, blue light, etc., and the magnitude relationship of the light intensity corresponding to the skin corresponding to the skin is adaptively adjusted. . Further, when the type of light is selected, light having a different light intensity relationship of the reflected light reflected by the biological tissue and the non-biological tissue should be selected. For example, when the red light and the infrared light are reflected by the biological tissue and the non-biological tissue, the light intensity of the reflected light has the same magnitude relationship, that is, the light intensity of the reflected light corresponding to the red light <the intensity of the reflected light corresponding to the infrared light, then the light is selected. When you type, you cannot choose only these two kinds of light.

S202. Determine that the wearable device is in a wearing state.

If the magnitude relationship between the light intensity of the reflected light corresponding to the light of the N different wavelengths is in accordance with the light intensity of the reflected light corresponding to the skin, the object to be detected is the skin, and it can be determined that the wearable device is worn at this time. On the living body, the wearable device is worn. The living body may include: a human body and an animal body. For convenience of explanation, the human body is exemplarily described as an example.

At this point, the wearable device can illuminate the screen and perform related functions such as step counting, heart rate detection, and calorie consumption detection.

S203. Determine that the wearable device is in an unworn state.

If the magnitude relationship between the light intensity of the reflected light corresponding to the light of the N different wavelengths does not match the light intensity of the reflected light corresponding to the skin, the detected object is not the skin, that is, the detected problem is a non-biological tissue. At this time, it can be determined that the wearable device is not worn on the human body, that is, the wearable device is in an unworn state. At this time, the wearable device can enter the power saving mode, and can also send the location information to a contact that has a specific contact with the wearable device.

FIG. 7 is a schematic flowchart of still another method for detecting a wearing state of a wearable device according to an embodiment of the present disclosure. This embodiment is another specific implementation manner of step S103 in the foregoing embodiment shown in FIG. 5 . On the basis of the embodiment shown in FIG. 5, as shown in FIG. 7, in the embodiment, it is determined in step S103 whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths corresponds to the skin. Determining the relationship between the light intensity of the reflected light and determining the wearing state of the wearable device according to the judgment result may specifically include the following steps:

S301: Determine whether the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths conforms to the magnitude relationship of the light intensity of the reflected light corresponding to the skin; if yes, execute step S302; if no, execute step S304.

For the step, reference may be made to the description of the step S201 corresponding to the embodiment shown in FIG. 6 , and details are not described herein again.

S302. Determine whether the waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic; if yes, execute step S303; if no, execute step S304.

Specifically, when the wearable device is worn on the human body, the waveform of the reflected light received from the human body is shaken with the pulse of the human body, and the waveform is regular, and the frequency is substantially the same as the human heart rate.

In order to further improve the accuracy of the detection result, in the embodiment, when determining the magnitude relationship between the light intensity of the reflected light corresponding to the light of the N different wavelengths and the light intensity of the reflected light corresponding to the skin, further detecting Whether the waveform of the reflected light corresponding to the N different wavelengths of light conforms to the heart rate characteristic, that is, whether the waveform of the reflected light corresponding to the light of the N different wavelengths is regular, and the frequency is within the range of the human heart rate.

S303. Determine that the wearable device is in a wearing state.

If the waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic, the wearable device is worn on the human body, and the wearable device can be determined to be in the wearing state.

S304. Determine that the wearable device is in an unworn state.

If the magnitude of the intensity of the reflected light corresponding to the light of the N different wavelengths does not match the magnitude of the intensity of the reflected light corresponding to the skin, or if the waveform of the reflected light corresponding to the light of the N different wavelengths is not If the heart rate feature is met, the wearable device is not worn on the human body, and the wearable device can be determined to be in an unworn state.

The method for detecting the wearing state of the wearable device according to the embodiment provides that the magnitude of the light intensity of the reflected light corresponding to the light of the N different wavelengths is consistent with the light intensity of the reflected light corresponding to the skin. In the case of the size relationship, it is further detected whether the waveform of the reflected light corresponding to the light of the N different wavelengths conforms to the heart rate characteristic to determine the wearing state of the wearable device, so that the accuracy of the wearing state detection result can be further improved.

FIG. 8 is a schematic flowchart of still another method for detecting a wearing state of a wearable device according to an embodiment of the present invention. This embodiment is further optimized for the foregoing embodiment. On the basis of all the above embodiments, as shown in FIG. 8, in this embodiment, before transmitting N different wavelengths of light to the detected object, the method further includes:

S401. A single wavelength of light is emitted to the detected object.

Specifically, one of the N LEDs may be selected to emit a single wavelength of light to the object to be detected. If the N LEDs include infrared LEDs, the infrared LEDs can be selected to emit a single wavelength of light, that is, the single wavelength of light is infrared light to save power.

S402. Acquire a light intensity c of the reflected light corresponding to the light of the single wavelength after being reflected by the detected object.

Similar to step S102, after the light intensity detecting device emits light of a single wavelength to the detected object through the LED, the light reflected by the detected object can be received by the PD device thereon, and converted into an electrical signal and sent to the wearable device. The processor in the processor; the processor can determine the light intensity c of the reflected light according to the electrical signal.

S403. Acquire an acceleration a of the wearable device.

Specifically, when the wearable device is worn on a human body, its acceleration increases. It is thus possible to initially determine the wearing state of the wearable device by the acceleration of the wearable device.

At the time of specific collection, the wearable device can collect the acceleration a of the wearable device in three directions perpendicular to each other by the acceleration sensor.

S404: Determine whether the light intensity c of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold Tc, and whether the acceleration a exceeds the acceleration threshold value Ta; if the light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold (c>Tc Or, if the acceleration exceeds the acceleration threshold (a>Ta), step S405 is performed; otherwise (a≤Ta, and c≤Tc), step S406 is performed.

S405. Transmit N different wavelengths of light to the detected object, and acquire the light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object.

S406. Determine that the wearable device is in an unworn state.

As described in steps S103 and S403, when the wearable device is in an unworn state, the light intensity check The intensity of the reflected light received by the measuring device is relatively small; when the wearable device is in the wearing state, the intensity of the reflected light received by the light intensity detecting device is relatively large, and the acceleration is also increased. At this time, the wearing state of the wearable device may be initially determined by whether the light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold and whether the acceleration exceeds the acceleration threshold, and the wearable device may be in a wearing state, that is, at a single wavelength. When the light intensity corresponding to the reflected light exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold, step S405 is performed to perform multi-wavelength detection; when the wearable device is in an unworn state, that is, the light intensity of the reflected light corresponding to the light of a single wavelength When the light intensity threshold is not exceeded and the acceleration does not exceed the acceleration threshold, step S405 is not performed to save power.

Specifically, the acceleration threshold may be three thresholds corresponding to the accelerations in the three directions, or may be a threshold corresponding to the acceleration in the three directions, which may be set according to requirements, and is not limited in this embodiment. .

It should be noted that there is no strict execution order relationship between steps S401-S402 and step S403. Steps S401-S402 may be performed before S403, may be performed after S403, or may be performed simultaneously with S403. The example is not particularly limited.

The method for detecting the wearing state of the wearable device provided by the embodiment, before transmitting the N different wavelengths of light to the detected object, first emitting light of a single wavelength to the detected object, and collecting the acceleration of the wearable device, determining a single When the light intensity of the reflected light corresponding to the wavelength exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold, N different wavelengths of light are emitted, thereby saving power and extending the use time of the wearable device.

FIG. 9 is a schematic flowchart of a method for detecting a wearing state of a wearable device according to an embodiment of the present invention. This embodiment is a more specific implementation manner of a method for detecting a wearing state of the wearable device in the foregoing embodiment. On the basis of all the above embodiments, as shown in FIG. 9, the wearing state detecting method of the wearable device provided by the embodiment includes the following steps:

S501. The light of the single wavelength is emitted to the object to be detected, and the light intensity c of the reflected light corresponding to the light of the single wavelength is reflected by the object to be detected.

For the step, refer to the descriptions of the corresponding steps S401 and S402 in the foregoing embodiment, and details are not described herein again.

S502. Acquire an acceleration a of the wearable device.

For the step, refer to the description of step S403 corresponding to the foregoing embodiment, and details are not described herein again.

S503. Determine whether the light intensity c of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold Tc. Whether the acceleration a exceeds the acceleration threshold value Ta; if the acceleration exceeds the acceleration threshold value (a>Ta), step S504 is performed after step S504 is performed; if the light intensity of the reflected light corresponding to the single wavelength light exceeds the light intensity threshold value (c>Tc), Then, after step S504 is performed, step S506 is performed; if the intensity of the reflected light corresponding to the light of the single wavelength does not exceed the light intensity threshold and the acceleration does not exceed the acceleration threshold (a≤Ta, and c≤Tc), step S509 is performed.

If the intensity of the reflected light corresponding to the single-wavelength light exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold, the wearable device may be in a wearing state, and then the subsequent multi-wavelength detection is performed; if the single-wavelength light corresponds to the reflected light When the light intensity does not exceed the second light intensity threshold and the acceleration does not exceed the acceleration threshold, it is determined that the wearable device is in an unworn state.

It should be noted that, in step S503, if the intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold (c>Tc), step S504 may be performed to perform step S506 to shorten the processing process and save power; Step S504 is followed by step S505 to improve the reliability of the determination. In the embodiment, step c504 is executed after c>Tc, and then step S506 is performed for exemplary description.

S504, transmitting N different wavelengths of light to the detected object, and acquiring light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object.

For the step, refer to the descriptions of the corresponding steps S101 and S102 in the foregoing embodiment, and details are not described herein again.

S505. Determine whether the light intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold. If yes, execute step S506; if no, execute step S509.

If the intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold, the detected object is closer to the light intensity detecting device, and the wearable device may be in a wearing state; if N different wavelengths of light are respectively If the intensity of the corresponding reflected light does not exceed the light intensity threshold, the detected object is far from the light intensity detecting device, and the wearable device is determined to be in an unworn state.

S506. Determine whether the magnitude relationship of the light intensity of the reflected light corresponding to the N different wavelengths of light corresponds to the magnitude of the light intensity of the reflected light corresponding to the skin; if yes, execute step S507; if no, execute step S509.

For the step, refer to the description of step S301 corresponding to the foregoing embodiment, and details are not described herein again.

S507. Determine whether the waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic; if yes, execute step S508; if no, execute step S509.

For the step, reference may be made to the description of the step S302 corresponding to the foregoing embodiment, and details are not described herein again.

S508. Determine that the wearable device is in a wearing state.

For the step, refer to the description of step S303 corresponding to the foregoing embodiment, and details are not described herein again.

S509. Determine that the wearable device is in an unworn state.

If the intensity of the reflected light corresponding to the light of a single wavelength does not exceed the threshold of the light intensity and the acceleration does not exceed the acceleration threshold, or the light intensity of the reflected light corresponding to the light of the N different wavelengths does not exceed the light intensity threshold, or N The magnitude relationship of the intensity of the reflected light corresponding to the light of different wavelengths does not match the magnitude of the intensity of the reflected light corresponding to the skin, or the waveform of the reflected light corresponding to the light of the N different wavelengths does not conform to the heart rate characteristic. It means that the wearable device is not worn on the human body, and it can be determined that the wearable device is in an unworn state.

FIG. 10 is a schematic structural diagram of a wearing state detecting apparatus according to an embodiment of the present invention. As shown in FIG. 10, the wearing state detecting apparatus 100 of the present embodiment includes: a light intensity detecting module 10 and a wearing state determining module 20, wherein :

The light intensity detecting module 10 is configured to emit N different wavelengths of light to the detected object, and acquire the light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object, where N is an integer greater than or equal to 2;

The wearing state determining module 20 is configured to determine, if the light intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold, determine whether the magnitude of the light intensity of the reflected light corresponding to the light of the N different wavelengths is consistent with The magnitude relationship of the light intensity of the reflected light corresponding to the skin; and determining the wearing state of the wearable device according to the judgment result.

In a specific implementation, the light intensity detecting module 10 can transmit N different wavelengths of light to the detected object through the LED, and then receive the reflected light corresponding to the light reflected by the detected object through the PD, and obtain the reflected light. Light intensity.

In this embodiment, the wearing state detecting device is applied to the wearable device, wherein the LED and the PD may be independent devices in the wearable device, or may be integrated. The processor that processes the light detected by the photodetector can be implemented as a separate processing device, integrated with the LED and photodetector, or integrated into the processor of the wearable device. In this embodiment, the light intensity detecting module 10 includes an LED and a photodetector, and the LED is configured to emit N different wavelengths of light to the detected object, and the photodetector is configured to receive the light of each wavelength after being reflected by the detected object. Corresponding reflected light and obtaining the light intensity of the reflected light.

As a specific implementation manner, the wearing state determining module 20 is specifically configured to:

The wearing state detecting device provided in this embodiment may perform the foregoing method embodiments, and the implementation principle is similar to the technical effect, and details are not described herein again.

FIG. 11 is a schematic structural diagram of another wearing state detecting apparatus according to an embodiment of the present invention. This embodiment is a further optimization of the wearable device in the embodiment shown in FIG. 10, and is based on the foregoing embodiment shown in FIG. As shown in FIG. 11, in this embodiment, the wearing state detecting apparatus 200 further includes:

The heart rate determination module 30 is configured to determine whether there is light corresponding to at least one wavelength if the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths matches the light intensity of the reflected light corresponding to the skin. The reflected light waveform conforms to the heart rate characteristic;

The wearing state determining module 20 is configured to determine that the wearable device is in a wearing state if the waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic;

As a specific implementation manner of the embodiment of the present invention, in the determining the wearing state of the wearable device according to the determination result, the wearing state determining module 20 is specifically configured to:

As an optional implementation manner of the embodiment of the present invention, the wearing state determining module 20 is further configured to:

As an optional implementation manner of the embodiment of the present invention, the light of the N different wavelengths includes at least the green light and the red light, and the relationship between the light intensity of the reflected light corresponding to the skin includes: the intensity of the reflected light corresponding to the green light. Less than the intensity of the reflected light corresponding to the red light; or,

N different wavelengths of light include at least green, red, and infrared light, and reflected light corresponding to the skin The relationship between the intensity of the light intensity includes that the intensity of the reflected light corresponding to the green light is smaller than the intensity of the reflected light corresponding to the red light, and the intensity of the reflected light corresponding to the green light is smaller than the intensity of the reflected light corresponding to the infrared light.

As an optional implementation manner of the embodiment of the present invention, the wearing state detecting device 200 further includes: an acceleration detecting module 40;

Before emitting N different wavelengths of light to the detected object, the light intensity detecting module 10 is further configured to:

Transmitting a single wavelength of light to the object to be detected;

The acceleration detecting module 40 is configured to collect acceleration of the wearable device;

The wearing state determining module 20 is further configured to determine that the light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold.

In a specific implementation, the acceleration detecting module 40 may acquire an acceleration signal through the acceleration sensor, and obtain an acceleration of the wearable device according to the acceleration signal.

The embodiment of the present invention further provides a wearable device, including the wearing state detecting device according to any of the embodiments of FIG. 10 and FIG.

The wearable device provided in this embodiment may perform the foregoing method embodiments, and the implementation principle is similar to the technical effect, and details are not described herein again.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A wearing state detecting method for a wearable device, comprising:

Transmitting N different wavelengths of light to the detected object, the N being an integer greater than or equal to 2;

Obtaining a light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object;

If the intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold, determining whether the magnitude relationship of the light intensity of the reflected light corresponding to the N different wavelengths respectively corresponds to the reflected light corresponding to the skin. The relationship between the intensity of light;

According to the judgment result, the wearing state of the wearable device is determined.
The method according to claim 1, wherein the determining the wearing state of the wearable device according to the determination result comprises:

And determining, if the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths is in accordance with the magnitude of the light intensity of the reflected light corresponding to the skin, determining that the wearable device is in a wearing state.
The method according to claim 1, wherein the determining the wearing state of the wearable device according to the determination result comprises:

If the magnitude relationship of the light intensity of the reflected light corresponding to the N different wavelengths of light corresponds to the magnitude of the light intensity of the reflected light corresponding to the skin, it is determined whether there is a waveform of the reflected light corresponding to the light of at least one wavelength. Conforms to heart rate characteristics;

Determining that the wearable device is in a wearing state if a waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic;

If the waveforms of the reflected light corresponding to the N different wavelengths of light do not conform to the heart rate feature, it is determined that the wearable device is in an unworn state.
The method according to claim 1, wherein the determining the wearing state of the wearable device according to the determination result comprises:

If the magnitude relationship of the light intensity of the reflected light corresponding to the N different wavelengths of light does not conform to the magnitude relationship of the light intensity of the reflected light corresponding to the skin, it is determined that the wearable device is in an unworn state.
The method according to any one of claims 1 to 4, wherein the method further comprises:

And determining, if the light intensity of the reflected light corresponding to the N different wavelengths of light does not exceed the light intensity threshold, determining that the wearable device is in an unworn state.
Method according to any of claims 1-5, characterized in that said N different waves The long light includes at least green light and red light, and the magnitude relationship of the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is smaller than the light intensity of the reflected light corresponding to the red light ;or,

The light of the N different wavelengths includes at least the green light and the infrared light, and the magnitude of the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is smaller than the corresponding light of the infrared light The intensity of the reflected light; or,

The light of the N different wavelengths includes at least green light, red light, and infrared light, and the magnitude of the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is less than the red light The light intensity of the reflected light corresponding to the light, and the light intensity of the reflected light corresponding to the green light is smaller than the light intensity of the reflected light corresponding to the infrared light.
The method according to any one of claims 1 to 6, wherein before the transmitting the N different wavelengths of light to the detected object, the method further comprises:

Transmitting a single wavelength of light to the object to be detected;

Obtaining a light intensity of the reflected light corresponding to the light of the single wavelength after being reflected by the detected object;

Collecting acceleration of the wearable device;

Determining whether the light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold, and whether the acceleration exceeds an acceleration threshold;

If the light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold, performing steps to emit N different wavelengths of light to the detected object;

And determining that the wearable device is in an unworn state if the light intensity of the reflected light corresponding to the single-wavelength light does not exceed the light intensity threshold and the acceleration does not exceed the acceleration threshold.
The method of claim 7 wherein said single wavelength of light is infrared light.
A wearing state detecting device, comprising:

The light intensity detecting module is configured to emit N different wavelengths of light to the detected object, and obtain light intensity of the reflected light corresponding to the light of each wavelength after being reflected by the detected object, wherein the N is greater than or equal to 2. Integer

a wearing state determining module, configured to determine, if the light intensity of the reflected light corresponding to the light of the at least one wavelength exceeds the light intensity threshold, determine whether the magnitude of the light intensity of the reflected light corresponding to the N different wavelengths respectively meets The magnitude relationship of the light intensity of the reflected light corresponding to the skin; and determining the wearing state of the wearable device based on the determination result.
The device according to claim 9, wherein the wearing state determining module is specifically configured to:

And determining, if the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths is in accordance with the magnitude of the light intensity of the reflected light corresponding to the skin, determining that the wearable device is in a wearing state.
The device according to claim 9, wherein the device further comprises:

The heart rate judging module is configured to determine whether there is at least one wavelength of light if the magnitude relationship of the light intensity of the reflected light corresponding to the light of the N different wavelengths matches the light intensity of the reflected light corresponding to the skin. The waveform of the corresponding reflected light conforms to the heart rate characteristic;

The wearing state determining module is specifically configured to determine that the wearable device is in a wearing state if a waveform of the reflected light corresponding to the light of the at least one wavelength conforms to the heart rate characteristic;

If the waveforms of the reflected light corresponding to the N different wavelengths of light do not conform to the heart rate feature, it is determined that the wearable device is in an unworn state.
The device according to claim 9, wherein the wearing state determining module is specifically configured to:

If the magnitude relationship of the light intensity of the reflected light corresponding to the N different wavelengths of light does not conform to the magnitude relationship of the light intensity of the reflected light corresponding to the skin, it is determined that the wearable device is in an unworn state.
The device according to any one of claims 9 to 12, wherein the wearing state determining module is further configured to:

And determining, if the light intensity of the reflected light corresponding to the N different wavelengths of light does not exceed the light intensity threshold, determining that the wearable device is in an unworn state.
The device according to any one of claims 9 to 13, wherein the N different wavelengths of light include at least green light and red light, and the magnitude relationship of the light intensity of the reflected light corresponding to the skin comprises: The intensity of the reflected light corresponding to the green light is smaller than the intensity of the reflected light corresponding to the red light; or

The light of the N different wavelengths includes at least the green light and the infrared light, and the magnitude of the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is smaller than the corresponding light of the infrared light The intensity of the reflected light; or,

The light of the N different wavelengths includes at least green light, red light, and infrared light, and the magnitude of the light intensity of the reflected light corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is less than the red light The light intensity of the reflected light corresponding to the light, and the light intensity of the reflected light corresponding to the green light is smaller than the light intensity of the reflected light corresponding to the infrared light.
The device according to any one of claims 9 to 14, wherein the device further comprises: an acceleration detecting module;

Before the transmitting the N different wavelengths of light to the detected object, the light intensity detecting module is further configured to:

Transmitting a single wavelength of light to the object to be detected;

Obtaining a light intensity of the reflected light corresponding to the light of the single wavelength after being reflected by the detected object;

The acceleration detecting module is configured to collect acceleration of the wearable device;

The wearing state determining module is further configured to determine that a light intensity of the reflected light corresponding to the light of the single wavelength exceeds the light intensity threshold or the acceleration exceeds an acceleration threshold.
The device according to any one of claims 9-15, wherein the light intensity detecting module comprises a light emitting diode LED and a light detector,

The LED is configured to emit N different wavelengths of light to the detected object, and the photodetector is configured to receive the reflected light corresponding to the light of each wavelength after being reflected by the detected object, and acquire the light of the reflected light. Strong.
A wearable device comprising the wearing state detecting device according to any one of claims 9-16.