CN107820410B

CN107820410B - Wearable device wearing state detection method and device and wearable device

Info

Publication number: CN107820410B
Application number: CN201780001114.XA
Authority: CN
Inventors: 郭加成; 刘和兴; 赵亮; 周威
Original assignee: Shenzhen Huiding Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2017-09-22
Filing date: 2017-09-22
Publication date: 2019-12-17
Anticipated expiration: 2037-09-22
Also published as: CN107820410A; WO2019056293A1

Abstract

The invention provides a wearable device wearing state detection method and device and a wearable device, wherein the method comprises the following steps: emitting N kinds of light with different wavelengths to a detected object; acquiring the light intensity of reflected light corresponding to light with each wavelength after the light is reflected by the detected object; if the light intensity of the reflected light corresponding to at least one wavelength of light exceeds the light intensity threshold, judging whether the magnitude relation of the light intensities of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensities of the reflected light corresponding to the skin; and determining the wearing state of the wearable equipment according to the judgment result. According to the technical scheme provided by the invention, the accuracy of the wearing state detection result of the wearable equipment can be improved.

Description

Wearable device wearing state detection method and device and wearable device

Technical Field

the invention relates to the technical field of wearable equipment, in particular to a wearable equipment wearing state detection method and device and wearable equipment.

background

Wearable equipment is the general term of applying wearing formula technique to carry out intelligent design, develop intelligent equipment that can wear to daily wearing, for example: intelligent wrist-watch, intelligent earphone and intelligent bracelet etc.. Wearable devices are generally powered by small or miniature batteries, so that the standby or working time is not too long; in addition, some functions of the wearable device related to human detection, such as: step counting, heart rate detection, caloric consumption detection, and the like, all can obtain valid data only when worn by a user. Therefore, in order to save electric quantity, prolong the service time of the wearable device and improve the accuracy of the test data related to wearing, many wearable devices have a wearing detection function, can automatically judge the wearing state of the wearable device, and further optimize related functions according to the wearing state.

in the prior art, a method for detecting a wearing state of a wearable device further detects an infrared reflection original value and a green light reflection original value of a human skin to determine whether the wearable device is worn by a human body when detecting that a distance between the wearable device and a surface of the human body is not less than a threshold value when the wearable device leaves the surface of an object, so as to improve accuracy of a wearing state detection result of the wearable device.

However, the light intensity of the reflected light (i.e. the original value of the reflected light) is easily affected by factors such as the anatomical structure of the skin, the distance from the light intensity detection device to the skin, and the body shaking, so that the method has a high false detection rate, and the accuracy of the wearable device wearing state detection result is not high enough.

disclosure of Invention

In view of this, the invention provides a wearable device wearing state detection method and apparatus, and a wearable device, which are used to improve the accuracy of a wearable device wearing state detection result.

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

emitting N kinds of light with different wavelengths to a detected object, wherein N is an integer greater than or equal to 2;

Acquiring the light intensity of reflected light corresponding to light with each wavelength after the light is reflected by the detected object;

if the light intensity of the reflected light corresponding to at least one wavelength of light exceeds the light intensity threshold, judging whether the magnitude relation of the light intensities of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensities of the reflected light corresponding to the skin;

And determining the wearing state of the wearable equipment according to the judgment result.

by utilizing the characteristics that biological tissues and non-biological tissues have different absorption and reflection on light with different wavelengths and the light intensity of the reflected light of the detected object in the same category is similar in magnitude relation, N kinds of light with different wavelengths are emitted to the detected object, and the light intensity of the reflected light corresponding to the light with each wavelength after being reflected by the detected object is obtained, when the light intensity of the reflected light corresponding to the light with at least one wavelength exceeds the light intensity threshold value, the wearing state of the wearable equipment is determined according to whether the magnitude relation of the light intensities of the reflected light corresponding to the light with the N different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin, the false detection rate of whether the light intensity of the reflected light is within the preset light intensity threshold value to judge whether the wearable equipment is close to the skin of the human body can be reduced, and the accuracy of the wearing state detection result of the wearable equipment is improved.

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

And if the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin, determining that the wearable device is in a wearing state.

if the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin, judging whether the waveform of the reflected light corresponding to at least one kind of wavelength light accords with the heart rate characteristic;

If the waveform of the reflected light corresponding to the light with at least one wavelength meets the heart rate characteristics, determining that the wearable equipment is in a wearing state;

And if the waveforms of the reflected lights corresponding to the N kinds of lights with different wavelengths do not accord with the heart rate characteristics, determining that the wearable equipment is in an unworn state.

When the size relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths is determined to be in accordance with the size relation of the light intensity of the reflected light corresponding to the skin, whether the waveform of the N kinds of light with different wavelengths is in accordance with the heart rate characteristic or not is further detected to determine the wearing state of the wearable device, and the accuracy of the wearing state detection result can be further improved.

and if the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths does not conform to the magnitude relation of the light intensity of the reflected light corresponding to the skin, determining that the wearable device is in an unworn state.

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

and if the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths does not exceed the light intensity threshold value, determining that the wearable device is not worn.

As an alternative embodiment of the present invention, the N different wavelengths of light include at least green light and red light, and the relationship between the magnitudes of the light intensities of the reflected lights corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is less than that of the reflected light corresponding to the red light; alternatively, the first and second electrodes may be,

the N different wavelengths of light include at least green light and infrared 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 less than that of the reflected light corresponding to the infrared light; alternatively, the first and second electrodes may be,

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

As an optional embodiment of the present invention, before emitting light of N different wavelengths to the detected object, the method further includes:

Emitting light of a single wavelength to an object to be detected;

acquiring the light intensity of reflected light corresponding to the light with the single wavelength after the light is reflected by the detected object;

acquiring the acceleration of the wearable device;

Judging whether the light intensity of reflected light corresponding to the light with the single wavelength exceeds a light intensity threshold value or not and whether the acceleration exceeds an acceleration threshold value or not;

If the light intensity of the reflected light corresponding to the light with the single wavelength exceeds a light intensity threshold value or the acceleration exceeds an acceleration threshold value, executing the step of emitting N kinds of light with different wavelengths to the detected object;

And if the light intensity of the reflected light corresponding to the light with the single wavelength does not exceed the light intensity threshold value and the acceleration does not exceed the acceleration threshold value, determining that the wearable device is in the unworn state.

The method comprises the steps of emitting light with a single wavelength to a detected object and acquiring the acceleration of the wearable device before emitting light with N different wavelengths to the detected object, and emitting the light with N different wavelengths when it is determined that the light intensity of reflected light corresponding to the light with the single wavelength exceeds a light intensity threshold or the acceleration exceeds an acceleration threshold, so that the electric quantity can be saved, and the service life of the wearable device can be prolonged.

in an alternative embodiment of the present invention, the single wavelength light is infrared light.

By using infrared light, power can be saved.

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

the light intensity detection module is used for emitting N kinds of light with different wavelengths to the detected object and acquiring the light intensity of reflected light corresponding to the light with each wavelength after the light with each wavelength is reflected by the detected object, wherein N is an integer greater than or equal to 2;

The wearing state determining module is used for judging whether the magnitude relation of the light intensity of the reflected light corresponding to the light with the N different wavelengths conforms to the magnitude relation of the light intensity of the reflected light corresponding to the skin or not if the light intensity of the reflected light corresponding to the light with the at least one wavelength exceeds a light intensity threshold; and determining the wearing state of the wearable equipment 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 embodiment of the present invention, the wearing state detection apparatus further includes:

the heart rate judging module is used for judging whether the waveform of the reflected light corresponding to at least one wavelength of light meets the heart rate characteristic or not if the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths meets the magnitude relation of the light intensity of the reflected light corresponding to the skin;

the wearable device comprises a wearable state determining module, a processing module and a display module, wherein the wearable state determining module is specifically used for determining that the wearable device is in a wearable state if the waveform of the reflected light corresponding to the light with at least one wavelength meets the heart rate characteristics;

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 embodiment of the present invention, the wearing state detection apparatus further includes: an acceleration detection module;

Before emitting light with N different wavelengths to the detected object, the light intensity detection module is further used for:

emitting light of a single wavelength to an object to be detected;

The acceleration detection module is used for acquiring the acceleration of the wearable equipment;

the wearing state determining module is further used for determining that the light intensity of the reflected light corresponding to the light with the single wavelength exceeds a light intensity threshold or the acceleration exceeds an acceleration threshold.

as an optional implementation manner of the present invention, the light intensity detection module includes an LED and a light detector, the LED is configured to emit N kinds of light with different wavelengths to the detected object, and the light detector is configured to receive reflected light corresponding to the light with each wavelength after being reflected by the detected object, and acquire light intensity of the reflected light.

The beneficial effects of the wearable device provided by the second aspect and the possible embodiments of the second aspect may refer to the beneficial effects brought by the first aspect and the possible embodiments of the first aspect, and are not described herein again.

In a third aspect, an embodiment of the present invention provides a wearable device, including the wearing state detection apparatus according to any one of the above second aspects.

the beneficial effects of the wearable device provided by the third aspect and the possible embodiments of the second aspect may refer to the beneficial effects brought by the possible embodiments of the second aspect and the second aspect, and are not described herein again.

Drawings

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

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

FIG. 3 is a schematic diagram illustrating a relationship between the light intensity of the reflected light of the three lights and the distance from the detected object to the light intensity detecting device according to the embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating another relationship between the light intensity of the reflected light of the three lights and the distance from the detected object to the light intensity detecting device according to the embodiment of the present invention;

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;

Fig. 6 is a schematic flowchart of another wearable device wearing state detection method according to an embodiment of the present invention;

Fig. 7 is a schematic flowchart of a wearing state detection method of a wearable device according to another embodiment of the present invention;

Fig. 8 is a schematic flowchart of a wearing state detection method of a wearable device according to another embodiment of the present invention;

fig. 9 is a schematic flowchart of a wearing state detection method of a wearable device according to another embodiment of the present invention;

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

Fig. 11 is a schematic structural diagram of another wearing state detection device according to an embodiment of the present invention.

Detailed Description

The technical scheme of the invention is explained in detail in the following with the accompanying drawings.

fig. 1 is a schematic structural diagram of a Light intensity detecting device according to an embodiment of the present invention, as shown in fig. 1, the Light intensity detecting device includes a Light Emitting Diode (LED) and a Photodiode (PD), Light is emitted to an object to be detected through the LED, and the emitted Light is reflected by the object to be detected and then received by the PD. In this embodiment, the PD is specifically exemplified by taking the PD as an example.

the light emitted by the light intensity detection device comprises green light, red light, infrared light and other visible light. Fig. 2 is a schematic diagram illustrating a relationship between the light intensity of the infrared reflected light and the distance between the skin and the light intensity detection device according to an embodiment of the present invention, as shown in fig. 2, fig. 2 is a graph formed by the light intensity data of the infrared reflected light at different distances on the skin of the wrist of two testees. The horizontal axis represents the distance between the light intensity detection device and the skin, and the vertical axis represents the intensity of the reflected light. In the test process, infrared light is emitted to the same position of the wrist skin of two testees, the distance between the light intensity detection device and the skin is gradually changed, the light intensity of the reflected light at each distance is recorded, and the testees keep still to prevent the wrists from shaking in the test process. As can be seen from fig. 2, in the case where the light intensity detection device is at the same distance from the skin of the two subjects, the difference between the measured light intensities of the infrared reflected light is large. The above test is exemplified by infrared light, the light intensity characteristics of the reflected light of other lights are similar to the light intensity of the infrared reflected light, and the light intensity difference of the reflected light finally measured is larger under the condition that the distance between the light intensity detection device and the skin of different testees is the same.

therefore, in the related art, whether the wearable device is close to the skin of the human body is judged by detecting whether the light intensity of the reflected light of the infrared light and the green light is within the preset light intensity threshold value, and then whether the human body wears the wearable device is judged.

fig. 3 is a schematic diagram illustrating a relationship between the light intensity of the reflected light of the three lights and the distance between the detected object and the light intensity detection device, where the horizontal axis represents the serial number of the sampling points collected in time sequence during the process of bringing the light intensity detection device closer to the skin from a distance, and the vertical axis represents the light intensity of the reflected light. As shown in fig. 3, under certain conditions, the light intensity of the reflected light is not always linear with the distance, and when the detected object gradually approaches the light intensity detection device, the light intensity of the reflected light received by the PD gradually increases; however, when the distance is approached within a certain range, the intensity of the reflected light is turned, and thereafter the intensity of the reflected light is decreased as the distance is decreased. As can be seen from fig. 3, at point P, an inflection point appears in the intensity of reflected light as a function of distance. It follows that the highest point of light intensity of the reflected light does not represent the closest position to the skin.

In addition, as can be seen from fig. 3, when the light intensity of the reflected light is closer to the detected object, the light intensity of the reflected light is significantly weaker than the highest light intensity; at this time, the light intensity is weak and the light intensity is close to the object to be detected, and the absorption rate of the object to be detected and other factors begin to play a significant role. When the detected object is a special object such as skin, the light intensity of the reflected light with different wavelengths is obviously different due to the difference of absorption and reflectivity. Fig. 4 is a schematic diagram illustrating another relationship between the light intensity of the reflected light of the three lights and the distance between the detected object and the light intensity detection device provided by the embodiment of the present invention, in which the horizontal axis represents the serial number of the sampling points collected in time sequence in the process of gradually approaching the light intensity detection device to the non-biological tissue from a distance and then gradually approaching the skin from the distance, and the vertical axis represents the magnitude of the light intensity of the reflected light. As shown in fig. 4, three different wavelengths of light (e.g. green light, red light, infrared light) are emitted to the skin and the non-biological tissue, and the magnitude relationship of the light intensity of the reflected light of the different wavelengths is shown as follows: the light intensity of the reflected light corresponding to green light is less than that of the reflected light corresponding to red light, and the light intensity of the reflected light corresponding to green light is less than that of the reflected light corresponding to infrared light; for non-biological tissues, the main manifestations are: the light intensity of the reflected light corresponding to green light > the light intensity of the reflected light corresponding to infrared light, and the light intensity of the reflected light corresponding to green light > the light intensity of the reflected light corresponding to red light.

Based on this, in order to improve the accuracy of the wearing state detection result of the wearable device, embodiments of the present invention provide a wearing state detection method and apparatus for the wearable device, and the method and apparatus provided by the present invention mainly utilize the difference between absorption and reflection of light with different wavelengths by biological tissues and non-biological tissues to emit light with different wavelengths to a detected object, and further distinguish the biological tissues from the non-biological tissues according to the magnitude relationship of the light intensity of each reflected light on the basis that the light intensity of the reflected light of at least one wavelength reaches the light intensity threshold, thereby implementing the wearing state detection of the wearable device.

fig. 5 is a schematic flow chart of a method for detecting a wearing state of a wearable device according to an embodiment of the present invention, and as shown in fig. 5, the method according to the embodiment may include the following steps:

S101, emitting light with N different wavelengths to the detected object.

Wherein N is an integer greater than or equal to 2; in specific implementation, the size of N may be selected according to needs, for example, N is selected to be 2, so as to save electric energy; and N is selected to be 3 so as to improve the detection accuracy. The object to be detected includes biological tissue (such as skin) and non-biological tissue.

Specifically, the wearable device may emit light of N different wavelengths to the detected object through N LEDs, for example: green light, red light, infrared light, and the like.

s102, acquiring the light intensity of the reflected light corresponding to the light with each wavelength after the light is reflected by the detected object.

Specifically, after the light intensity detection device emits light with different wavelengths to the detected object through the LED, the light reflected by the detected object can be received through the PD device on the light intensity detection device, and is converted into an electric signal to be sent to the processor in the wearable device; the processor may determine the intensity of the reflected light corresponding to each wavelength of light from the electrical signal.

S103, if the light intensity of the reflected light corresponding to at least one wavelength of light exceeds a light intensity threshold, judging whether the magnitude relation of the light intensity of the reflected light corresponding to the N types of light with different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin; and determining the wearing state of the wearable equipment according to the judgment result.

The detected objects are different or the distances between the detected objects and the light intensity detection device are different, the light intensity of reflected light is different, and the type of the detected objects and the distance between the detected objects and the light intensity detection device can be determined according to the light intensity of the reflected light.

Specifically, when the wearable device is not worn, the light intensity detection device is not shielded by the detected object, that is, the detected object is far away from the light intensity detection device, and the light intensity of the reflected light received by the light intensity detection device is small; when wearable equipment was in wearing the state, when being sheltered from by the detected object before the light intensity detection device, it was nearer apart from the light intensity detection device promptly to be detected the object, and the light intensity of the reverberation that the light intensity detection device received at this moment can be bigger. By setting a light intensity threshold, the distance between the light intensity detection device and the detected object can be judged, and the wearing state of the wearable device can be further determined.

In this embodiment, after the light intensity of the reflected light corresponding to the light with each wavelength reflected by the detected object is obtained, it is first determined whether the light intensity of each reflected light exceeds a light intensity threshold, and if the light intensity of the reflected light corresponding to at least one wavelength exceeds the light intensity threshold, it indicates that the detected object is closer to the light intensity detection device, and the wearable device may be in a wearing state; if the light intensity of the reflected light corresponding to the light with the N different wavelengths does not exceed the light intensity threshold value, the detected object is far away from the light intensity detection device, and the wearable device is determined to be in an unworn state. The light intensity thresholds corresponding to the N kinds of light with different wavelengths can be the same, namely the light with the wavelengths in the N kinds of light adopts the same light intensity threshold; the light intensity thresholds corresponding to the N kinds of light with different wavelengths may also be different, that is, the light with wavelengths in N respectively adopts different light intensity thresholds. The size of the light intensity threshold value may be determined according to the minimum value of the light intensity of the reflected light when the wearable device is in a wearing state, and the specific numerical value is not particularly limited in this embodiment.

As can be seen from fig. 4, the biological tissue and the non-biological tissue have different absorption and reflection of light with different wavelengths, and have a certain rule, in this embodiment, when it is determined that the light intensity of the reflected light corresponding to the light with at least one wavelength exceeds the light intensity threshold, the wearing state of the wearable device is further determined according to the magnitude relationship between the light intensities of the reflected lights corresponding to the lights with N different wavelengths.

specifically, different types of detected objects (biological tissues and non-biological tissues) have different absorption and reflection of light with different wavelengths, and the intensity of the reflected light has different magnitude relationships, and the intensity of the reflected light has similar magnitude relationships for the same type of detected objects. As shown in fig. 4, the magnitude relationship of the light intensity of the reflected light of different wavelengths for the skin (biological tissue) is shown as: the light intensity of the reflected light corresponding to green light is less than that of the reflected light corresponding to red light, and the light intensity of the reflected light corresponding to green light is less than that of the reflected light corresponding to infrared light; for non-biological tissues, the magnitude relationship of the light intensity of the reflected light of different wavelengths is mainly expressed as: the light intensity of the reflected light corresponding to green light > the light intensity of the reflected light corresponding to infrared light, and the light intensity of the reflected light corresponding to green light > the light intensity of the reflected light corresponding to red light.

in this embodiment, after the light intensity of the reflected light corresponding to the light with each wavelength after being reflected by the detected object is obtained, the magnitude relationship of the light intensity of the reflected light corresponding to each of the N kinds of light with different wavelengths may be matched with the magnitude relationship of the light intensity of the reflected light corresponding to the skin, whether the magnitude relationship of the light intensity of the reflected light corresponding to each of the N kinds of light with different wavelengths conforms to the magnitude relationship of the light intensity of the reflected light corresponding to the skin is determined, and the wearing state of the wearable device is determined according to the determination result. For example: the magnitude relation of the light intensity of the reflected light corresponding to the light with the N different wavelengths respectively accords with the magnitude relation 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, determining that the wearable device is in an unworn state.

In the method for detecting the wearing state of the wearable device provided by this embodiment, by using the characteristics that biological tissues and non-biological tissues absorb and reflect light with different wavelengths, and the light intensity of the reflected light of the detected object of the same category is similar in magnitude relation, N kinds of light with different wavelengths are emitted to the detected object, and the light intensity of the reflected light corresponding to the light with each wavelength after being reflected by the detected object is obtained, and when the light intensity of the reflected light corresponding to the light with at least one wavelength exceeds the light intensity threshold, it is determined whether the magnitude relation between the light intensities of the reflected lights corresponding to the N kinds of light with different wavelengths meets the magnitude relation between the light intensities of the reflected lights corresponding to the skin; and according to the judgment result, the wearing state of the wearable equipment is determined, the false detection rate of judging whether the wearable equipment is close to the skin of a human body by judging whether the light intensity of the reflected light is within a preset light intensity threshold value can be reduced, and the accuracy of the wearing state detection result of the wearable equipment is improved.

Fig. 6 is a schematic flow chart of another wearable device wearing state detection method according to an embodiment of the present invention, and this embodiment is a specific implementation manner of step S103 in the embodiment shown in fig. 5. On the basis of the embodiment shown in fig. 5, as shown in fig. 6, in this embodiment, in step S103, it is determined whether the magnitude relationship between the light intensities of the reflected lights corresponding to the N kinds of light with different wavelengths respectively matches the magnitude relationship between the light intensities of the reflected lights corresponding to the skin; and according to the judgment result, determining the wearing state of the wearable device may specifically include the following steps:

S201, judging whether the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin; if yes, go to step S202; if not, go to step S203.

specifically, as shown in fig. 4, the magnitude relationship of the light intensity of the reflected light of different wavelengths for the skin is shown as follows: the light intensity of the reflected light corresponding to green light < the light intensity of the reflected light corresponding to red light, and the light intensity of the reflected light corresponding to green light < the light intensity of the reflected light corresponding to infrared light. The magnitude relation of the light intensity of the reflected light corresponding to the skin can be determined according to the relation and the kind of light selected.

several possible implementations are listed below:

The first method comprises the following steps: the light of the N different wavelengths at least comprises: green light and red light; the magnitude relation 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 light intensity of the reflected light corresponding to the red light.

And the second method comprises the following steps: the light of the N different wavelengths at least comprises: green light and infrared light; the magnitude relation 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 that of the reflected light corresponding to the infrared light;

and the third is that: the light of the N different wavelengths at least comprises: green, red and infrared light; the magnitude relation 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 that of the reflected light corresponding to the red light, and the light intensity of the reflected light corresponding to the green light is smaller than that of the reflected light corresponding to the infrared light.

it should be noted that, the above is only an exemplary illustration, the N lights with different wavelengths may also include other visible lights, such as ultraviolet light, blue light, etc., and the relationship between the intensity of the reflected light corresponding to the skin and the intensity of the reflected light is correspondingly adjusted. In selecting the type of light, light having different relationship between the intensity of reflected light reflected by the biological tissue and the intensity of reflected light reflected by the non-biological tissue should be selected. For example: the relationship between the intensity of the reflected light after the red light and the infrared light are reflected by the biological tissue and the non-biological tissue is the same, that is, the intensity of the reflected light corresponding to the red light is less than the intensity of the reflected light corresponding to the infrared light, and thus, when the type of the light is selected, only the two lights cannot be selected.

s202, determining that the wearable device is in a wearing state.

If the magnitude relation of the light intensity of the reflected light corresponding to the light with the N different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin, the detected object is the skin, and at this moment, the wearable device can be determined to be worn on the organism, namely, the wearable device is in a wearing state. Among these, the organism may include: human body and animal body, for convenience of description, the following description will be exemplified by human body.

At this point, the wearable device may illuminate the screen, performing related functions such as pedometer, heart rate detection, and caloric consumption detection.

s203, determining that the wearable device is in an unworn state.

if the magnitude relation of the light intensity of the reflected light corresponding to the light with the N different wavelengths does not conform to the magnitude relation of the light intensity of the reflected light corresponding to the skin, the detected object is not the skin, namely the detected problem is the non-biological tissue, and at this moment, it can be determined that the wearable device is not worn on the human body, namely the wearable device is in the non-worn state. At this time, the wearable device may enter a power saving mode, and may also send location information to a preset contact person having a specific contact with the wearable device.

Fig. 7 is a schematic flowchart of a wearing state detection method of another wearable device according to an embodiment of the present invention, and this embodiment is another specific implementation manner of step S103 in the embodiment shown in fig. 5. On the basis of the embodiment shown in fig. 5, as shown in fig. 7, in this embodiment, in step S103, it is determined whether the magnitude relationship between the light intensities of the reflected lights corresponding to the N kinds of light with different wavelengths respectively matches the magnitude relationship between the light intensities of the reflected lights corresponding to the skin; and according to the judgment result, determining the wearing state of the wearable device may specifically include the following steps:

S301, judging whether the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin; if yes, go to step S302; if not, go to step S304.

this step can refer to the description of step S201 corresponding to the embodiment shown in fig. 6, and is not described herein again.

s302, judging whether the waveform of the reflected light corresponding to the light with at least one wavelength meets the heart rate characteristics; if yes, go to step S303; if not, go to step S304.

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

in order to further improve the accuracy of the detection result, in this embodiment, when it is determined that the magnitude relationship between the light intensities of the reflected lights corresponding to the N kinds of light with different wavelengths respectively conforms to the magnitude relationship between the light intensities of the reflected lights corresponding to the skin, it is further detected whether the waveforms of the reflected lights corresponding to the N kinds of light with different wavelengths conform to the heart rate characteristics, that is, whether the waveforms of the reflected lights corresponding to the N kinds of light with different wavelengths are regular, and the frequency is within the range of the heart rate of the human body.

S303, determining that the wearable device is in a wearing state.

if the waveform of the reflected light corresponding to the light with at least one wavelength meets the heart rate characteristics, the wearable device is worn on the human body, and at this time, it can be determined that the wearable device is in a wearing state.

S304, determining that the wearable device is in an unworn state.

if the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths does not conform to the magnitude relation of the light intensity of the reflected light corresponding to the skin, or if the waveforms of the reflected light corresponding to the N kinds of light with different wavelengths do not conform to the heart rate characteristics, it is indicated that the wearable device is not worn on the human body, and at this time, it can be determined that the wearable device is not worn.

according to the wearing state detection method for the wearable device, when it is determined that the magnitude relation of the light intensity of the reflected light corresponding to the lights with the N different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin, whether the waveform of the reflected light corresponding to the lights with the N different wavelengths accords with the heart rate characteristic or not is further detected to determine the wearing state of the wearable device, and therefore the accuracy of the wearing state detection result can be further improved.

Fig. 8 is a schematic flow chart of a wearing state detection method of another wearable device according to an embodiment of the present invention, which is a further optimization of the foregoing embodiment. On the basis of all the above embodiments, as shown in fig. 8, in this embodiment, before emitting light of N different wavelengths to the detected object, the method further includes:

S401, emitting light with single wavelength to the detected object.

Specifically, one of the N LEDs may be selected to emit light of a single wavelength toward the inspected object. If the N LEDs include an infrared LED, the infrared LED may be selected to emit light of a single wavelength, that is, the light of the single wavelength is infrared light, so as to save electric energy.

s402, acquiring the light intensity c of the reflected light corresponding to the light with the single wavelength after the light is reflected by the detected object.

similar to step S102, after the light intensity detection device emits light with 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, which is sent to the processor in the wearable device; the processor may determine the intensity c of the reflected light from the electrical signal.

And S403, acquiring the acceleration a of the wearable device.

in particular, when the wearable device is worn on a human body, its acceleration increases. The wearing state of the wearable device can thus be determined preliminarily by the acceleration of the wearable device.

In a specific acquisition, the wearable device can acquire the acceleration a of the wearable device in three directions perpendicular to each other through the acceleration sensor.

s404, judging whether the light intensity c of the reflected light corresponding to the light with the single wavelength exceeds a light intensity threshold Tc and whether the acceleration a exceeds an acceleration threshold Ta; if the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold (c > Tc) or the acceleration exceeds the acceleration threshold (a > Ta), executing step S405; otherwise (a ≦ Ta, and c ≦ Tc), perform step S406.

S405, emitting N kinds of light with different wavelengths to the detected object, and obtaining the light intensity of the reflected light corresponding to the light with each wavelength after the light with each wavelength is reflected by the detected object.

s406, determining that the wearable device is in an unworn state.

As described in steps S103 and S403, when the wearable device is not worn, the light intensity of the reflected light received by the light intensity detection device is relatively small; when the wearable device is in a wearing state, the light intensity of the reflected light received by the light intensity detection device is larger, and the acceleration is increased. At this time, the wearing state of the wearable device may be preliminarily determined by whether the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold and whether the acceleration exceeds the acceleration threshold, and the step S405 is executed to perform the multi-wavelength detection when the wearable device may be in the wearing state, that is, when the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold; when the wearable device is in an unworn state, that is, when the light intensity of the reflected light corresponding to the light with the single wavelength does not exceed the light intensity threshold and the acceleration does not exceed the acceleration threshold, the step S405 is not executed to save the power.

Specifically, the acceleration threshold may be three thresholds corresponding to accelerations in three directions respectively, or may also be a threshold corresponding to an acceleration in three directions after the accelerations in three directions are combined into one, which may be specifically set as required, and this embodiment is not particularly limited.

It should be noted that there is no strict execution order relationship between steps S401 to S402 and step S403, and steps S401 to S402 may be executed before S403, after S403, or simultaneously with S403, and this embodiment is not particularly limited.

According to the wearing state detection method of the wearable device, before the light with the N different wavelengths is emitted to the detected object, the light with the single wavelength is emitted to the detected object, the acceleration of the wearable device is collected, and when it is determined that the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold or the acceleration exceeds the acceleration threshold, the light with the N different wavelengths is emitted again, so that the electric quantity can be saved, and the service life of the wearable device is prolonged.

Fig. 9 is a schematic flow chart of a wearing state detection method of a wearable device according to another embodiment of the present invention, which is a more specific implementation manner of the wearing state detection method of the wearable device in the foregoing embodiment. On the basis of all the above embodiments, as shown in fig. 9, the method for detecting a wearing state of a wearable device provided by this embodiment includes the following steps:

S501, emitting light with a single wavelength to the detected object, and obtaining light intensity c of reflected light corresponding to the light with the single wavelength after the light with the single wavelength is reflected by the detected object.

For this step, reference may be made to the description of steps S401 and S402 corresponding to the above embodiment, which is not described herein again.

and S502, acquiring the acceleration a of the wearable device.

For this step, reference may be made to the description of step S403 corresponding to the above embodiment, which is not described herein again.

S503, judging whether the light intensity c of the reflected light corresponding to the light with the single wavelength exceeds a light intensity threshold Tc or not, and whether the acceleration a exceeds an acceleration threshold Ta or not; if the acceleration exceeds the acceleration threshold (a > Ta), executing step S504 and then executing step S505; if the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold (c > Tc), executing step S506 after executing step S504; if the light intensity of the reflected light corresponding to the light with the single wavelength does not exceed the light intensity threshold and the acceleration does not exceed the acceleration threshold (a is less than or equal to Ta and c is less than or equal to Tc), step S509 is executed.

If the light intensity of the reflected light corresponding to the light with the single wavelength exceeds a light intensity threshold value or the acceleration exceeds an acceleration threshold value, the wearable device is possibly in a wearing state, and then subsequent multi-wavelength detection is carried out; if the light intensity of the reflected light corresponding to the light with the single wavelength 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 not worn.

It should be noted that, if the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold (c > Tc) in step S503, step S506 may be executed after step S504 is executed to shorten the processing procedure and save the power; step S505 may be executed after step S504 is executed, so as to improve the judgment reliability. In the present embodiment, step S506 is performed after step S504 is performed when c > Tc.

S504, emitting N kinds of light with different wavelengths to the detected object, and obtaining the light intensity of the reflected light corresponding to the light with each wavelength after the light with each wavelength is reflected by the detected object.

for this step, reference may be made to the description of steps S101 and S102 corresponding to the above embodiment, which is not repeated herein.

S505, judging whether the light intensity of the reflected light corresponding to the light with at least one wavelength exceeds a light intensity threshold value, if so, executing a step S506; if not, step S509 is executed.

if the light intensity of the reflected light corresponding to the light with at least one wavelength exceeds the light intensity threshold value, the fact that the detected object is close to the light intensity detection device is indicated, and the wearable device is possibly in a wearing state; if the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths does not exceed the light intensity threshold value, the detected object is far away from the light intensity detection device, and the wearable device is determined to be in an unworn state.

s506, judging whether the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin; if yes, go to step S507; if not, step S509 is executed.

for this step, reference may be made to the description of step S301 corresponding to the above embodiment, which is not described herein again.

S507, judging whether the waveform of the reflected light corresponding to the light with at least one wavelength meets the heart rate characteristics; if yes, go to step S508; if not, step S509 is executed.

for this step, reference may be made to the description of step S302 corresponding to the above embodiment, which is not described herein again.

And S508, determining that the wearable device is in a wearing state.

For this step, reference may be made to the description of step S303 corresponding to the above embodiment, which is not described herein again.

S509, determining that the wearable device is in an unworn state.

If the light intensity of the reflected light corresponding to the light with the single wavelength does not exceed the light intensity threshold and the acceleration does not exceed the acceleration threshold, or the light intensities of the reflected lights corresponding to the light with the N different wavelengths do not exceed the light intensity threshold, or the magnitude relation of the light intensities of the reflected lights corresponding to the light with the N different wavelengths does not conform to the magnitude relation of the light intensities of the reflected lights corresponding to the skin, or the waveforms of the reflected lights corresponding to the light with the N different wavelengths do not conform to the heart rate characteristic, it is indicated that the wearable device is not worn on the human body, and at this time, it can be determined that the wearable device is not worn.

Fig. 10 is a schematic structural diagram of a wearing state detection device according to an embodiment of the present invention, and as shown in fig. 10, the wearing state detection device 100 according to the embodiment includes: a light intensity detection module 10 and a wearing state determination module 20, wherein:

the light intensity detection module 10 is configured to emit N kinds of light with different wavelengths to the detected object, and obtain light intensity of reflected light corresponding to the light with 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 whether the magnitude relationship between the light intensities of the reflected lights corresponding to the N kinds of light with different wavelengths meets the magnitude relationship between the light intensities of the reflected lights corresponding to the skin if the light intensity of the reflected light corresponding to at least one kind of light with the wavelength exceeds the light intensity threshold; and determining the wearing state of the wearable equipment according to the judgment result.

In a specific implementation, the light intensity detection module 10 may emit N kinds of light with different wavelengths to the detected object through the LED, and then receive the reflected light corresponding to the light with each wavelength reflected by the detected object through the PD, and obtain the light intensity of the reflected light.

In this embodiment, the wearing state detection apparatus is applied to a wearable device, wherein the LED and the PD may be independent devices in the wearable device or may be integrated together. The processor for processing the light detected by the light detector may be implemented by a separate processing device, may be integrated with the LED and the light detector, and may be integrated in the processor of the wearable device. In this embodiment, the light intensity detection module 10 includes an LED and a light detector, where the LED is configured to emit N kinds of light with different wavelengths to the detected object, and the light detector is configured to receive reflected light corresponding to the light with each wavelength after being reflected by the detected object, and obtain light intensity of the reflected light.

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

the wearing state detection apparatus provided in this embodiment may implement the method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

fig. 11 is a schematic structural diagram of another wearing state detection apparatus according to an embodiment of the present invention, which is a further optimization of the wearable device in the embodiment shown in fig. 10, and on the basis of the embodiment shown in fig. 10, as shown in fig. 11, in this embodiment, the wearing state detection apparatus 200 further includes:

The heart rate judging module 30 is configured to judge whether a waveform of the reflected light corresponding to at least one wavelength of light meets a heart rate characteristic if the magnitude relation of the light intensities of the reflected lights corresponding to the N types of light with different wavelengths meets the magnitude relation of the light intensities of the reflected lights corresponding to the skin;

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

as a specific implementation manner of the embodiment of the present invention, in 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 N kinds of light with different wavelengths at least include green light and red light, and the relationship between the magnitudes of the light intensities of the reflected lights corresponding to the skin includes: the light intensity of the reflected light corresponding to the green light is less than that of the reflected light corresponding to the red light; alternatively, the first and second electrodes may be,

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

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

emitting light of a single wavelength to an object to be detected;

The acceleration detection module 40 is used for acquiring the 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 with the single wavelength exceeds a light intensity threshold or the acceleration exceeds an acceleration threshold.

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

the embodiment of the invention also provides wearable equipment which comprises the wearing state detection device in any one of the embodiments of fig. 10 and fig. 11.

The wearable device provided by this embodiment can perform the above method embodiments, and the implementation principle and technical effect thereof are similar, and are not described herein again.

finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wearing state detection method of a wearable device is characterized by comprising the following steps:

acquiring the light intensity of reflected light corresponding to the light with each wavelength after the light is reflected by the detected object;

if the light intensity of the reflected light corresponding to at least one wavelength of light exceeds a light intensity threshold, judging whether the magnitude relation of the light intensities of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensities of the reflected light corresponding to the skin;

2. the method according to claim 1, wherein the determining the wearing state of the wearable device according to the determination result specifically includes:

3. the method according to claim 1, wherein the determining the wearing state of the wearable device according to the determination result specifically includes:

If the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths respectively accords with the magnitude relation of the light intensity of the reflected light corresponding to the skin, judging whether the waveform of the reflected light corresponding to at least one kind of light with different wavelengths accords with the heart rate characteristic;

And if the waveforms of the reflected lights corresponding to the N lights with different wavelengths do not accord with the heart rate characteristics, determining that the wearable equipment is in an unworn state.

4. the method according to claim 1, wherein the determining the wearing state of the wearable device according to the determination result specifically includes:

And if the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths does not conform to the magnitude relation of the light intensity of the reflected light corresponding to the skin, determining that the wearable device is not worn.

5. The method according to any one of claims 1-4, further comprising:

and if the light intensities of the reflected lights corresponding to the N kinds of light with different wavelengths do not exceed the light intensity threshold, determining that the wearable device is not worn.

6. The method according to any one of claims 1-4, wherein the N different wavelengths of light include at least green and red light, and wherein the magnitude relationship of the intensity of the reflected light corresponding to the skin comprises: the light intensity of the reflected light corresponding to the green light is less than that of the reflected light corresponding to the red light; alternatively, the first and second electrodes may be,

The light of the N different wavelengths at least comprises green light and infrared light, and the magnitude relation of the light intensity of the reflected light corresponding to the skin comprises: the light intensity of the reflected light corresponding to the green light is less than that of the reflected light corresponding to the infrared light; alternatively, the first and second electrodes may be,

the light with the N different wavelengths at least comprises green light, red light and infrared light, and the magnitude relation of the light intensity of the reflected light corresponding to the skin comprises the following steps: the light intensity of the reflected light corresponding to the green light is less than the light intensity of the reflected light corresponding to the red light, and the light intensity of the reflected light corresponding to the green light is less than the light intensity of the reflected light corresponding to the infrared light.

7. The method of any one of claims 1-4, wherein prior to said emitting N different wavelengths of light to the inspected object, the method further comprises:

Emitting light with a single wavelength to the detected object;

Acquiring the light intensity of the reflected light corresponding to the light with the single wavelength after the light is reflected by the detected object;

acquiring acceleration of the wearable device;

judging whether the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold value or not and whether the acceleration exceeds the acceleration threshold value or not;

if the light intensity of the reflected light corresponding to the light with the single wavelength exceeds the light intensity threshold value or the acceleration exceeds the acceleration threshold value, executing the step of emitting N kinds of light with different wavelengths to the detected object;

And if the light intensity of the reflected light corresponding to the light with the single wavelength does not exceed the light intensity threshold value and the acceleration does not exceed the acceleration threshold value, determining that the wearable device is in an unworn state.

8. the method of claim 7, wherein the single wavelength of light is infrared light.

9. A wearing state detection device characterized by comprising:

The light intensity detection module is used for emitting N kinds of light with different wavelengths to a detected object and acquiring the light intensity of reflected light corresponding to the light with each wavelength after the light with each wavelength is reflected by the detected object, wherein N is an integer greater than or equal to 2;

The wearing state determining module is used for judging whether the magnitude relation of the light intensity of the reflected light corresponding to the N kinds of light with different wavelengths conforms to the magnitude relation of the light intensity of the reflected light corresponding to the skin or not if the light intensity of the reflected light corresponding to at least one kind of light with the wavelength exceeds a light intensity threshold; and determining the wearing state of the wearable equipment according to the judgment result.

10. The apparatus according to claim 9, wherein the wearing state determining module is specifically configured to:

11. the apparatus of claim 9, further comprising:

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

12. The apparatus according to claim 9, wherein the wearing state determining module is specifically configured to:

13. The apparatus of any of claims 9-12, wherein the wear state determination module is further configured to:

14. The device according to any one of claims 9-12, wherein the N different wavelengths of light include at least green and red light, and wherein the relationship between the intensity of the reflected light corresponding to the skin comprises: the light intensity of the reflected light corresponding to the green light is less than that of the reflected light corresponding to the red light; alternatively, the first and second electrodes may be,

15. the apparatus according to any one of claims 9-12, further comprising: an acceleration detection module;

Before the emission of the light with the N different wavelengths to the detected object, the light intensity detection module is further configured to:

Emitting light with a single wavelength to the detected object;

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

16. the device according to any one of claims 9-12, wherein the light intensity detection module comprises a Light Emitting Diode (LED) and a light detector,

The LED is used for emitting N kinds of light with different wavelengths to the detected object, and the light detector is used for receiving the reflected light corresponding to the light with each wavelength after the light is reflected by the detected object and acquiring the light intensity of the reflected light.

17. a wearable device characterized by comprising the wearing state detection apparatus according to any one of claims 9 to 16.