CN113470803A

CN113470803A - Wearing identification method, wearable device and storage medium

Info

Publication number: CN113470803A
Application number: CN202110634037.XA
Authority: CN
Inventors: 何岸; 许晓凯
Original assignee: DO Technology Co ltd
Current assignee: DO Technology Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-10-01

Abstract

The embodiment of the invention provides a wearing identification method, wearing equipment and a storage medium. The wearing identification method comprises the following steps: acquiring motion data detected by a motion sensor and an optical signal detected by an optical sensor; determining a motion state of the wearable device according to the motion data, wherein the motion state comprises a static state and an active state; and determining the wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal. The method can be used for identifying the wearing state of the wearable device by combining the motion sensor and the optical sensor, and can improve the identification accuracy and reduce the false identification probability compared with the detection of a reflection signal by a single optical sensor.

Description

Wearing identification method, wearable device and storage medium

Technical Field

The invention relates to the technical field of wearable equipment, in particular to a wearing identification method, wearable equipment and a storage medium.

Background

Along with the concern of people on daily health, the intelligent wearable equipment is rapidly developed, and the functions are more abundant. The wearable device may detect human health indicators such as heart rate, caloric consumption, sleep conditions, etc. through various sensors. These tests can only be carried out with accuracy if the user is wearing the device normally. Therefore, a wearing detection function is required to determine whether or not the wearable device is in a wearing state.

In the current wearing identification method, a single optical sensor is usually adopted to detect a reflection signal of green light or infrared light, and the wearable device determines whether the wearable device is worn by determining whether the reflection signal meets a preset threshold. The method is difficult to distinguish people from objects, and the wearable device can be judged to be in a wearing state when being close to the objects, so that the misrecognition rate is high.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a wearing identification method, a wearable device and a storage medium, wherein the wearing identification method can determine whether the wearable device is in a wearing state, and can reduce a false identification rate.

The present application provides in a first aspect a wear identification method applied to a wearable device including a motion sensor and an optical sensor for detecting a physiological parameter, the method including: acquiring motion data detected by a motion sensor and an optical signal detected by an optical sensor; determining a motion state of the wearable device according to the motion data, wherein the motion state comprises a static state and an active state; and determining the wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal. The method can be used for identifying the wearing state of the wearable device by combining the motion sensor and the optical sensor, and can improve the identification accuracy and reduce the false identification probability compared with the detection of a reflection signal by a single optical sensor.

With reference to the first aspect, in a possible implementation manner, the determining the wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal includes: adjusting the wearing grade of the wearable device according to the duration of the wearable device in the static state and/or the active state and the intensity grade of the optical signal; the wearing state of the wearable device is determined according to the wearing levels, wherein the wearing state of the wearable device comprises a worn state and an unworn state, each wearing state comprises at least 1 wearing level, and the wearing levels are configured to be higher and closer to the worn state, and the wearing levels are lower and closer to the unworn state.

With reference to the first aspect, in one possible implementation manner, the intensity level of the optical signal is configured to: the intensity of the optical signal is smaller than or equal to a first intensity threshold value and is a first intensity level, the intensity of the optical signal is larger than the first intensity threshold value and is smaller than or equal to a second intensity threshold value and is a second intensity level, the intensity of the optical signal is larger than the second intensity threshold value and is smaller than or equal to a third intensity threshold value and is a third intensity level, the intensity of the optical signal is larger than the third intensity threshold value and is a fourth intensity level, the first intensity threshold value is a signal intensity maximum value of reflected light received by the optical sensor when the optical sensor is in a null state, the second intensity threshold value is a signal intensity maximum value of the reflected light received by the optical sensor when the wearable device is placed on the side of the wearable device, and the third intensity threshold value is a signal intensity minimum value of the reflected light received by the optical sensor when the wearable device is worn on a human body.

With reference to the first aspect, in one possible implementation manner, the adjusting the wearing level of the wearable device includes: when the intensity level of the optical signal is a first intensity level, reducing the wearing level of the wearable device by one level; when the intensity level of the optical signal is a second intensity level and the duration of the wearable device in the static state is greater than a first duration threshold, reducing the wearing level of the wearable device by one level; and when the intensity level of the optical signal is a third intensity level and the duration of the wearable device in the static state is greater than a second duration threshold, reducing the wearing level of the wearable device by one level.

With reference to the first aspect, in one possible implementation manner, the adjusting the wearing level of the wearable device includes: and when the intensity level of the optical signal is the fourth intensity level and the duration of the wearable device in the active state is greater than the third duration threshold, increasing the wearing level of the wearable device by one level.

With reference to the first aspect, in a possible implementation manner, the method further includes: determining a pose of the wearable device from the motion data; and adjusting the wearing grade of the wearable device according to the intensity of the light signal, the posture of the wearable device and the motion state of the wearable device.

With reference to the first aspect, in one possible implementation manner, the adjusting the wearing level of the wearable device includes: when the intensity level of the optical signal is a fourth intensity level, the posture of the wearable device is a side-lying or flat-lying posture, and the duration of the wearable device in the static state is greater than a fourth time threshold, the wearing level of the wearable device is reduced by one level.

With reference to the first aspect, in a possible implementation manner, the motion sensor is an acceleration sensor, and determining the motion state of the wearable device according to the motion data includes: and determining the motion state of the wearable device according to the amplitudes of three axes of the acceleration sensor.

With reference to the first aspect, in a possible implementation manner, the optical sensor is an infrared light sensor, and the method further includes: and determining the light intensity level of the light signal according to the minimum value of the reflected light within the preset time period of the infrared light sensor.

With reference to the first aspect, in a possible implementation manner, the method further includes: the switch state of the optical sensor is determined according to the motion state of the wearable device.

With reference to the first aspect, in one possible implementation manner, the determining a switch state of the optical sensor according to the motion state of the wearable device includes: when the optical sensor is in an open state and the duration of the wearable device in a static state is greater than a fifth duration threshold, closing the optical sensor; when the optical sensor is in the off state and the wearable device is switched from the static state to the active state, the optical sensor is turned on.

A second aspect of the present application provides a wearable device, comprising: a motion sensor for detecting motion data; an optical sensor for detecting an optical signal; the characteristic extraction module is used for determining the motion state of the wearable equipment according to the motion data, and the motion state comprises a static state and an active state; and the wearing state identification module is used for determining the wearing state of the wearable equipment according to the motion state of the wearable equipment and the intensity of the optical signal.

A third aspect of the present application provides a wearable device, including a processor and a memory, where the memory stores a computer program capable of being executed by the processor, and the computer program, when executed by the processor, implements the wear identification method as in any one of the possible implementations of the first aspect to the first aspect.

A fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements a wear identification method as in any one of the possible implementations of the first aspect to the first aspect.

The application provides a wearing identification method, wearing equipment and a storage medium. The method comprises the following steps: acquiring motion data detected by a motion sensor and an optical signal detected by an optical sensor; determining a motion state of the wearable device according to the motion data, wherein the motion state comprises a static state and an active state; and determining the wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal. The method can be used for identifying the wearing state of the wearable device by combining the motion sensor and the optical sensor, and can improve the identification accuracy and reduce the false identification probability compared with the detection of a reflection signal by a single optical sensor.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a wearable device provided in an embodiment of the present application;

fig. 2 is a flowchart of a method for wear identification according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a three-axis acceleration signal in a wearable device according to an embodiment of the present disclosure;

fig. 4 is a schematic view of a wearable device according to an embodiment of the present disclosure placed on a plane;

fig. 5 is a flowchart of a method for wear identification according to an embodiment of the present application;

fig. 6 is a flowchart illustrating on/off state control of an optical sensor in a wearable device according to an embodiment of the present disclosure;

fig. 7 is a functional block diagram of a wearable device according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Current wearable devices can detect human health indicators such as heart rate, caloric consumption, sleep conditions, and the like, through various sensors. These tests can only be carried out with accuracy if the user is wearing the device normally. How to determine that the wearable device is in a wearing state is a problem to be considered.

Some current schemes use a single Infrared (IR) sensor or a green sensor for detection. And when the light intensity of the detected IR signal or green light signal is greater than a certain threshold value, the wearable device is judged to be in a wearing state. And when the IR signal or the green light signal is not detected or the detected IR signal or the detected green light signal is less than the threshold value, judging that the wearable device is in the unworn state. Therefore, whether the garment is worn or not is judged simply through the threshold value, the human body and the object are difficult to distinguish, and the error recognition rate is high. And optical sensor needs to keep opening in addition, and the consumption is great, and power consumption is great, can lead to like this that the user experiences and receives the influence.

In view of this, the present application provides a wearable device, and a structural schematic diagram of the wearable device. As shown in fig. 1, the wearable device 10 includes:

the device comprises a memory 101, a wireless charging coil 102, a wireless charging control module 103, a battery 104, an audio module 105, a Bluetooth module 106, a radio frequency communication module 107, a motion sensor 108, a touch display 109, an optical sensor 110, other I/O devices 120, a control chip 130 and an I/O subsystem 140. Wherein the control chip 130 may include: memory controller 131, peripheral interface 132, and processor 133. The I/O subsystem 140 may include: display controller 141, optical sensor controller 142, other I/O controller 143. Wherein, each module is connected through communication bus or signal line communication.

The memory 101 may include volatile memory and/or non-volatile memory. For example, memory 101 may store commands or data related to at least one other component of the wearable device 10. Memory 101 may store software and/or programs in accordance with embodiments of the present application. The programs may include, for example, Application Programming Interfaces (APIs), application programs (APPs), and Operating Systems (OSs). The API is an interface that provides functions allowing the application storage controller 131 to control. For example, the API may include at least one interface or function (e.g., commands) for submission control, window control, image processing, or text control.

The Memory 101 may include, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.

The wireless charging coil 102 can be used to receive power in a wireless fashion. In addition, the wearable device 10 may further include a wired charging interface, such as a charging pin or a micro usb or other interface capable of implementing a wired charging function. Still further, the wearable device 10 may further include a wired charging interface and a wired charging control module for charging the battery 104 in a wired manner.

The wireless charging control module 103 is used for controlling an external power source to wirelessly charge the wearable device 10. For example, wireless power is rectified, voltage and current are controlled, and then the battery is charged. The power of the wireless charging transmitting device can be controlled by wirelessly communicating with the wireless charging transmitting device. The wireless charging control module 103 may further include a sensing unit, which may be a current sensor, which may measure the intensity of the charging current applied to the wireless charging coil 102 according to the reception of the wireless power.

The battery 104 may store wireless power received through the wireless charging coil 102 or power received through a wired charging interface. Power may also be provided to other modules.

The audio module 105 is used to convert audio data into electrical signals and transmit the electrical signals to a speaker, or the audio module 105 may also be used to receive electrical signals from a speaker and convert the electrical signals into audio data. The bluetooth module 106 is used for the wearable device 10 to establish bluetooth connection with an external device, so as to implement bluetooth communication, for example, bluetooth communication can be implemented between the wearable device 10 and the external device such as a mobile phone and an earphone. The radio frequency communication module 107 is used for receiving and transmitting electromagnetic signals for the wearable device 10 to perform mobile communication.

The motion sensor 108 is used to acquire motion data of the wearable device 10, so as to analyze motion states such as posture and inertial information, and the motion sensor 108 may include an accelerometer, a gyroscope sensor, a pressure sensor, a magnetometer, a GPS receiver, and the like, and is used for acceleration, angle, pressure, direction, and position information of the wearable device, which are not shown in fig. 1 one by one, but are not limited to the present application.

The memory controller 131, peripheral interface 132, and processor 133 may be integrated onto the control chip 130.

The memory controller 131 is used to control other modules of the wearable device 10 to access the memory 101 to implement corresponding functions. The memory controller 131 may function as a relay, for example, to allow other modules to access software or programs stored in the memory 101.

The peripheral interface 132 is used to couple input and output peripherals of the wearable device 10 to the processor 133 and the memory controller 131. The peripheral devices may include peripheral devices such as a wireless charging control module 103, an audio module 105, a bluetooth module 106, a radio frequency communication module 107, an accelerometer 108, and an I/O subsystem.

The Processor 133 may include a Central Processing Unit (CPU), an Application Processor (AP), a Communication Processor (CP), a Network Processor (NP), and the like; but may also be one or more of a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware components. The processor 133 may perform control of at least one of the other components of the wearable device 10 and/or perform operations or data processing related to communication. The processor 133 may refer to a controller. The processor 133 may perform data processing and invoke software programs and/or sets of instructions from the memory 101 to implement various functions of the wearable device 10.

The I/O subsystem 140 may couple input/output peripherals on the wearable device 10 to the peripheral interface, the I/O subsystem 140 may include a display controller 141, an optical sensor controller 142, and other I/O controllers 143. The display controller 141 may control the touch display 109, the optical sensor controller 142 may control the optical sensor 110, and the other I/O controller 143 may control the other I/O device 120. The other I/O devices 120 may include a rotatable crown, switches, edge touch sensitive strips, and the like. The optical sensor 110 may be used to emit as well as detect optical signals.

The present application provides a wearing identification method, please refer to fig. 2, which includes:

s201, motion data detected by the motion sensor is acquired.

Motion data detected by the motion sensor is acquired. The motion sensor may be understood with reference to the motion sensor 108 in the wearable device 10 described above, which may include an acceleration sensor, a gyroscope sensor, a pressure sensor, a magnetometer, and the like. The motion data detected by the motion sensor may include acceleration information, angular velocity information, pressure information, geomagnetic information, and the like.

Taking the motion sensor as a three-axis acceleration sensor as an example, the motion data may be acceleration signals of an X axis, a Y axis, and a Z axis. Referring to fig. 3, the wearable device may include a three-axis acceleration sensor, and the three-axis acceleration sensor may continuously output acceleration signals of an X axis, a Y axis, and a Z axis.

The fluctuation degree of the wearable device can be obtained through the motion sensor, and the fluctuation degree can embody the fluctuation amount of the wearable device. Specifically, the fluctuation degree may be represented by an amplitude of any one of an X axis, a Y axis, and a Z axis in the three-axis sensor, may also be represented by a magnitude of a total momentum of the wearable device, or may be represented by another manner that may represent the fluctuation degree, which is not limited herein. Due to the calculation of the amplitudeThe degree of fluctuation indicated by the amplitude of any one of the X, Y, and Z axes is small, and can be determined quickly to improve the processing efficiency. For example, the amplitude of the axis with the largest amplitude in the three-axis sensor represents the fluctuation degree, and the calculation formula of the amplitude can be expressed as max_{i＝x，Y，Z}(max(ACC_i)-min(ACC_i)). The amplitude can represent the fluctuation degree of the acceleration signal within a period of time, so that whether the equipment is in a static state or not is judged.

S202, acquiring an optical signal detected by the optical sensor.

An optical signal detected by an optical sensor is acquired. The optical sensor may include a light emitter and a light receiver. The optical transmitter may transmit an optical signal to a human body, and the optical receiver may receive an optical signal reflected by the optical signal via the human body or an object. The wavelength of the optical signal is not limited in this application. Typically in wearable devices, photoplethysmography (PPG) measurements may be employed. The PPG generally contains both green and infrared light. Preferably, in the present application, the optical sensor may emit and receive infrared light. The infrared light is adopted to measure the wearing state of the wearable equipment, so that the influence of visible light on wearing identification can be reduced, and the wearing identification accuracy can be improved.

After the light receiver receives the reflected light signal, the illumination intensity of the light signal can be judged, and the intensity interval corresponding to the illumination intensity is judged according to the preset intensity threshold value. Wherein each intensity interval corresponds to a particular intensity level of the optical signal. The light intensity of the light signal can be measured into the intensity level of the light signal, so that the wearing state of the wearable device can be judged according to the intensity level of the light signal.

The corresponding relationship between the intensity level of the optical signal and the intensity interval of the optical signal is as follows:

intensity interval of optical signal	Intensity level of optical signal
		I_minNot more than the first intensity threshold	First intensity level
First intensity threshold is less than or equal to I_minNot more than the second intensity threshold	Second intensity level
		The second intensity threshold is less than or equal to I_minNot more than third intensity threshold	Third intensity class
I_minNot less than third intensity threshold	Fourth intensity class

Wherein, I_minThe characteristic value may be a minimum value, a maximum value, or an average value of the intensity of the optical signal in a period of time, and is not limited herein.

Note that, this I_minIs set in association with the intensity threshold. For example, the I_minThe minimum value of the intensity of the optical signal in a period of time is taken, and the first intensity threshold value is the maximum value of the space-time of the optical sensor. Then the I_minLess than or equal to the first intensity threshold may indicate that the wearable device is not worn for the period of time, and the light signal level may be determined to be the first intensity level. When the component I is_minIf the intensity is greater than the first intensity threshold, it indicates that the wearing state is likely to be high, and the optical signal level may be determined as the second intensity level, and then the subsequent determination may be performed.

That is, when I is_minThe first intensity threshold may be a maximum value of the optical sensor versus space time, when a minimum value of the optical signal is taken over a period of time. In other embodiments, I may be selected_minIs the maximum value of the optical signal over a period of time, the first intensity threshold may be the minimum value of the optical sensor with respect to the space time, which will not be described in detail herein. The first one is_minIs set in association with the intensity threshold, i.e. the intensity threshold is based on the value of I_minThe value of the light signal is set correspondingly, so that the light signal level determined according to the intensity of the light signal can be ensured to be accurate and strict, and the wearing state of the wearable device can be determined accurately in the following process.

With the addition of I_minFor example, the minimum value of the intensity of the optical signal in a period of time, the first intensity threshold is the maximum value of the reflected light received by the optical sensor when the optical sensor is empty. The second intensity threshold is a maximum value of a signal intensity of the reflected light received by the optical sensor when the wearable device is placed on its side. The third intensity threshold is a minimum value of signal intensity of reflected light received by the optical sensor when the wearable device is worn on a human body. The first to third intensity thresholds are explained below, respectively:

1.1) first intensity threshold:

the first intensity threshold is the maximum value of reflected light received by the optical sensor when empty. If I_minAnd if the intensity level of the optical signal is less than or equal to the maximum value of the reflected light received by the optical sensor in the empty state, the optical sensor of the wearable device is in the empty state, and the intensity level of the optical signal is the first intensity level. When the optical sensor of the wearable device is in an empty state, the wearable device can be directly judged to be in an unworn state.

It is to be understood that the optical sensor is empty, i.e. there is no object in the optical sensor within a certain distance directly opposite the light emitter. That is, the optical receiver can receive very little reflected light signal that is emitted by the optical transmitter and reflected via a human body or an object. In this case, it can be directly determined that the wearable device is in an unworn state. Therefore, the calculation process can be reduced, and the wearing identification efficiency can be improved. The first intensity threshold is related to the illumination intensity in the environment, and can be set according to specific situations. The first intensity threshold may be a reading of the optical sensor when empty, for example, the reading is 5000.

1.2) second intensity threshold:

the second intensity threshold is a maximum value of the signal intensity of the received reflected light when the optical sensor is placed on the wearable device side. Generally, for wearable devices, the outside diameter of the watch face is typically larger than the outside diameter of the watch band. Referring to fig. 4, when the wearable device is placed on a plane, the dial of the wearable device is usually in a tilted state. When the wearable device is in a tilted state, the optical signal emitted by the optical emitter in the optical sensor can be partially reflected by the plane and can be received by the optical receiver.

Typically, the second intensity threshold is greater than the first intensity threshold. The second intensity threshold may be a reading value of the optical sensor when the wearable device is placed on its side, and the reading value may be 15000. If I_minGreater than the first intensity threshold, and I_minLess than or equal to the second intensity threshold, the intensity level of the light signal may be determined to be the second intensity level. But it cannot be directly judged whether the wearable device is in the worn state only by the fact that the level of the light signal intensity is the second intensity level.

1.3) third intensity threshold:

the third intensity threshold is a minimum value of the signal intensity of the reflected light signal received when the wearable device is worn on the human body. It should be noted that people with different skin colors, such as yellow, black, and brown, wear the glasses. In the case where the optical transmitters transmit the same optical signal, the minimum value of the signal intensity of the reflected optical signal received by the optical receiver may be different. Therefore, the third intensity threshold may be automatically selected according to the region where the wearable device is used, or according to the race of the user, and the skin color. Or may be set according to the race selected by the user. Therefore, the third intensity threshold is stronger for different races, the level of the identified light signal intensity is more accurate, and the user experience can be improved. Illustratively, the third intensity threshold may be a reading value of the optical sensor when the user is a yellow person, and the reading value may be 25000.

If I_minGreater than the second intensity threshold, and I_minLess than or equal to the third intensity threshold, the intensity level of the optical signal may be determined to be the third intensity level. If I_minGreater than or equal to the third intensity threshold, the intensity level of the optical signal may be determined to be the fourth intensity level.

S203, determining the motion state of the wearable device.

A motion state of the wearable device is determined from the motion data detected by the motion sensor, the motion state including a stationary state and an active state. It is noted that the motion state of the wearable device refers to the motion state of the user wearing the wearable device. The following description is made in terms of both obtaining the duration of the still state and/or the active state and reducing the duration error of the motion state.

2.1) duration of the acquisition of the quiescent state and/or the active state:

after determining the amplitude of the largest amplitude axis of the three-axis sensors of the wearable device in step S201, the duration of time that the wearable device remains in the stationary state or the duration of time that the wearable device remains in the active state may be determined. Further, the amplitude of the wearable device may be detected at regular intervals in step S201. If the amplitude of the wearable device is less than or equal to a set amplitude threshold value within a fixed period of time, it may be determined that the wearable device is in a stationary state within the fixed period of time. If the amplitude of the wearable device is greater than a set amplitude threshold value within a period of time, it may be determined that the wearable device is active for the fixed period of time. It is noted that the motion state of the wearable device may specifically be a motion state of a user wearing the wearable device.

For example, the amplitude of the wearable device is detected once every second, if the amplitude of the wearable device in the second is greater than a set amplitude threshold, it may be determined that the wearable device is in an active state in the second, and if the amplitude of the wearable device in the second is less than or equal to the set amplitude threshold, it may be determined that the wearable device is in a stationary state in the second. If the amplitude of the wearable device is greater than the set amplitude threshold within one second, it may be determined that the wearable device is in an active state within that second. For example, the set amplitude threshold may range from 3 to 20.

After one interval duration determines that the wearable device is in the active state, the wearable device is in the active state again in the next interval duration, and then the duration of the wearable device being in the active state can be accumulated. When the wearable device is in the stationary state for the next interval duration after the interval duration is determined to be in the stationary state, the states of the wearable device remaining stationary may be accumulated. After one interval duration determines that the wearable device is in the static state, when the wearable device is in the active state for the next interval duration, the duration of keeping the static state can be emptied, and the duration of keeping the static state starts to be accumulated. When one interval duration determines that the wearable device is in the active state, and the next interval duration determines that the wearable device is in the static state, the duration of keeping in the active state can be emptied, and the duration of keeping in the static state starts to be accumulated.

2.2) measures to reduce the duration error of the motion state:

it should be noted that it is possible to intermittently remain still even during exercise by the user wearing the wearable device. In order to avoid errors in the accumulation of the time lengths for maintaining the motion state, and thus errors in subsequent wearing identification. In one embodiment, the accumulated motion-preserving duration is only zeroed when the duration of the resting state reaches a preset resting duration threshold. Rather than immediately empty the duration of motion when the wearable device is determined to be in a stationary state for an interval duration. Therefore, the situation that when the user is in a motion state and intermittently stops, the motion state judgment error caused by the fact that the motion keeping duration is immediately emptied can be avoided. Therefore, the accuracy of the motion state identification of the user can be improved, and the accuracy of wearable equipment wearing identification is improved. For example, the preset still time threshold may be in a range of 60 seconds to 1800 seconds.

And S204, determining the wearing state of the wearable device according to the motion state of the wearable device and the light signal intensity.

And determining the wearing state of the wearable device according to the motion state of the wearable device and the light signal strength. The wearing state of the wearable device may include a worn state and an unworn state. Wherein each wearing state includes at least one wearing level, and the wearing level is configured such that the higher the level, the closer to being identified as a worn state, the lower the wearing level, the closer to being identified as an unworn state. In one embodiment, the wearing level can be classified into three levels of 0, 1 and 2, which respectively represent an unworn state, a suspicious wearing state and a worn state.

Due to the different intensities of the light signals and the duration of the different motion states, it is possible to correspond to various complex actual user wearing states. The wearable device is characterized in that the intensity levels of the optical signals are graded, the wearing level of the wearable device is identified by combining the motion state, and the wearing state of the wearable device is output according to the wearing level. The method is beneficial to the classification and identification of various complex wearing states and improves the accuracy of wearing identification. Please refer to two substeps of 3.1 and 3.2 specifically:

3.1) adjusting the wearing level of the wearable device according to the duration of the wearable device remaining in the static and/or active state and the level of the light signal intensity.

The relationship between the level of the light signal intensity, the exercise status, and the amount of change in the wearing level is shown in the following table:

3.11) when the intensity level of the optical signal is the first intensity level, it indicates that the intensity of the optical signal is less than the maximum value of the reflected light received by the optical sensor during the empty time, and the optical sensor is highly likely not to be worn. Therefore, the wearing level can be directly lowered by one step regardless of the motion state.

It is noted that the wearable device may have an initial wearing level. For example, the initial level may be 2, indicating a worn state. The wearing level change is based on a current wearing level of the wearable device. It should be noted that if the current level is the highest level set, the current level is maintained at the highest level set after being raised by one level. If the current level is the set lowest level, the current level is maintained at the set lowest level after being lowered by one level. For example, if the current level is 2, the level is changed to 1 by decreasing by one level. If the current highest grade is set to be 2, if the highest grade is increased by one grade, the increased grade is still 2; if the current level is 0, since 0 is the lowest level currently set, if one level is lowered, the level after the lowering is still 0. If the level is raised by one, the raised level is 1.

3.12) when the intensity level of the optical signal is the second intensity level and the duration of the static state is more than the first duration threshold, the wearing level is changed to be reduced by one step. Illustratively, the first duration threshold is 600 seconds.

When the intensity of the optical signal is at the second intensity level, the wearable device is between the two states that the optical sensor is empty and the wearable device is laterally placed. In both states, the wearable device is less likely to be worn. The first duration threshold is shorter. The wearing level can be lowered by one step in a short time. The judgment can be made as soon as possible, and the timeliness of wearing identification is improved.

3.13) when the intensity level of the optical signal is a third intensity level and the duration of the static state is more than a second duration threshold, the wearing level is changed to be reduced by one step. The second duration threshold is greater than the first duration threshold. Illustratively, the second duration threshold is 1800 seconds.

When the intensity of the optical signal is at a third intensity level, the wearable device is between being placed on the side and being worn. The likelihood of being worn is higher than in the 3.12. It is necessary to lower the wearing level by one step when the stationary time period exceeds the second time period threshold. The second duration threshold is greater than the first duration threshold, so that the stationary duration threshold can be increased under the condition of relatively high wearing possibility, the wearing grade is prevented from being reduced within a short time, and the judgment accuracy can be improved.

3.14) when the intensity level of the optical signal is the fourth intensity level and the duration of the keep-alive state is greater than the third duration threshold, the wearing level is changed to be increased by one step. The third duration threshold is less than the first duration threshold. Illustratively, the third duration threshold is 3 seconds.

When the light signal intensity level is the fourth intensity level, it can directly indicate that the wearable device is in a worn state to some extent. The third duration threshold is shorter, and the wearing level can be increased in a short time. The wearing level can be quickly raised, so that the state of the wearable device is determined as a worn state.

It should be noted that, after the duration of the keep-alive state is longer than the third duration threshold, the accumulated active duration may be continued, and when the duration of the keep-alive state reaches another duration threshold higher than the third duration threshold, the wearing level may be further increased by one step, for example, when the third duration is twice, the wearing level may be further increased by one step.

Determining the change in the wear level is performed continuously. Taking the intensity level of the optical signal as the second intensity level as an example, if the duration of the wearable device remaining in the stationary state is greater than the first duration threshold, the wearable device is still in the stationary state, and it may be further determined whether the duration of the wearable device remaining in the stationary state is greater than the second duration threshold. If the duration of the continuous rest is greater than the second duration threshold, the wearing level can be lowered by one step. When the duration of the keep-alive is greater than the third threshold, the wearing level may be raised by one step. If the intensity level of the optical signal is the third intensity level, the wearing level may also be continuously updated, which is not described herein again.

3.2) determining the wearing state of the wearable device according to the wearing grade of the wearable device.

The wearing state of the wearable device may include a worn state and an unworn state. Wherein each wearing state includes at least one wearing level, and the wearing level is configured such that the higher the level, the closer to being identified as a worn state, the lower the wearing level, the closer to being identified as an unworn state.

In one embodiment, the wearing level may include three levels of 0, 1, and 2. Where 0 indicates that the current wearing state is an unworn state, and both 1 and 2 may indicate that the current wearing state is a worn state. But a rating of 1 is more likely to be in an unworn state than a rating of 2. The wearing level is 1, and the wearing state is considered to be a pseudo wearing state.

And updating the wearing grade of the wearable device according to the wearing grade change, so that the current wearing grade of the wearable device can be obtained. And determining the wearing state corresponding to the current wearing grade according to the current wearing grade, so that the wearing state of the wearable equipment can be determined.

The application provides a wearing identification method of wearable equipment. The method comprises the following steps: acquiring motion data detected by a motion sensor and an optical signal detected by an optical sensor; determining a motion state of the wearable device according to the motion data, wherein the motion state comprises a static state and an active state; and determining the wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal. The method can be used for identifying the wearing state of the wearable device by combining the motion sensor and the optical sensor, and can improve the identification accuracy and reduce the false identification probability compared with the detection of a reflection signal by a single optical sensor.

In step S204, in the process of determining the motion state of the wearable device, the posture of the wearable device may be used as a reference index. The wearing level of the wearable device can be determined according to the intensity of the light signal, the posture of the wearable device, and the motion state of the wearable device. Specifically, referring to fig. 5, another embodiment of the wearing identification method may include:

s301, motion data detected by the motion sensor are acquired.

Motion data detected by the motion sensor is acquired. Please refer to step S201 for understanding, which is not described herein again.

S302, acquiring the optical signal detected by the optical sensor.

An optical signal detected by an optical sensor is acquired. Please refer to step S202 for understanding, which is not described herein.

And S303, determining the posture of the wearable device according to the motion data.

In step S301 and step S201, taking the motion sensor as a three-axis acceleration sensor as an example, the motion data acquired in step S301 may include acceleration signals of an X axis, a Y axis, and a Z axis.

The Z-axis direction, i.e., the angle of the Z-axis acceleration signal with respect to the horizontal plane, can be calculated from the characteristic values of the acceleration signals of the X-axis, the Y-axis, and the Z-axis.

The characteristic value is taken as a median value of the acceleration signal in a period of time, but in an actual implementation process, a minimum value, a maximum value or an average value in a period of time may also be taken as the characteristic value, which is not limited herein. However, in order to ensure the accuracy in the Z-axis direction, the values of the characteristic values of the acceleration signals of the X-axis, the Y-axis, and the Z-axis are of the same type. For example, the median of the X axis in a period of time is taken as the feature value, then the feature value of the Y axis in the period of time is also the median of the period of time, and the feature value of the Z axis in the period of time is also the median of the period of time.

The calculation formula of the Z-axis direction is as follows:

wherein Z is_medianTo a median value of the Z-axis acceleration signal for a set period of time, X_medianFor the median value, Y, of the acceleration signal of the X axis within the set period_medianIs the median value of the Y-axis acceleration signal in the set period. And the X is_medianAnd Y_medianNot simultaneously 0.

When X is present_medianAnd Y_medianAnd when the Z-axis direction is 0, the Z-axis direction directly takes a value of 90 degrees.

The Z-axis direction is used to determine whether the wearable device is in a particular pose, which may include flat and side. Generally, there is a greater likelihood that the wearable device will be unworn when laid flat or on its side. Therefore, whether the wearable device is in the special posture can be used as a reference index to judge whether the wearable device is in the worn state, and the wearing identification accuracy can be improved.

Specifically, when the Z-axis direction is less than or equal to a first threshold of degrees, or greater than or equal to a second threshold of degrees, the wearable device is considered to be in a special posture. Illustratively, the first metric threshold may be between 0 degrees and 7 degrees. The second metric threshold may range between 83 degrees and 90 degrees. The wearable device is in a flat state if the Z-axis direction is less than or equal to the first threshold value, and the wearable device is in a side-lying state if the Z-axis direction is greater than or equal to the second threshold value.

S304, determining the motion state of the wearable device.

The step of determining the motion state of the wearable device may be understood by referring to step S204, which is not described herein again.

S305, determining the wearing state of the wearable device according to the motion state of the wearable device, the light signal intensity and the posture of the wearable device.

And determining the wearing state of the wearable device according to the motion state of the wearable device, the light signal strength and the posture of the wearable device. The wearing state of the wearable device may include a worn state and an unworn state. Wherein each wearing state includes at least one wearing level, and the wearing level is configured such that the higher the level, the closer to being identified as a worn state, the lower the wearing level, the closer to being identified as an unworn state. In one embodiment, the wearing level can be classified into three levels of 0, 1 and 2, which respectively represent an unworn state, a suspicious wearing state and a worn state. Please refer to two substeps of 4.1 and 4.2 specifically:

4.1) adjusting the wearing grade of the wearable device according to the duration of the wearable device keeping still and/or active state, the grade of the light signal intensity and the posture of the wearable device.

The relationship between the level of the light signal intensity, the motion state, the posture and the wearing level variation is shown in the following table:

4.11) when the intensity level of the optical signal is the first intensity level, it indicates that the intensity of the optical signal is less than the maximum value of the reflected light received by the optical sensor during the empty time, and the optical sensor is highly likely not to be worn. Therefore, the wearing level can be directly lowered by one step regardless of the motion state.

4.12) when the intensity level of the optical signal is the second intensity level and the duration of the static state is more than the first duration threshold, the wearing level is changed to be decreased by one step. Illustratively, the first duration threshold is 600 seconds.

4.13) when the intensity level of the optical signal is a third intensity level and the duration of the static state is greater than the second duration threshold, the wearing level is changed to be decreased by one step. The second duration threshold is greater than the first duration threshold. Illustratively, the second duration threshold is 1800 seconds.

When the light signal intensity is at the third intensity level, it indicates that the wearable device is between being placed on its side and being worn, and the wearable device is more likely to be worn than in the 3.12. It is necessary to lower the wearing level by one step when the stationary time period exceeds the second time period threshold. The second duration threshold is greater than the first duration threshold, so that the stationary duration threshold can be increased under the condition of relatively high wearing possibility, the wearing grade is prevented from being reduced within a short time, and the judgment accuracy can be improved.

4.14) when the intensity level of the optical signal is the fourth intensity level and the duration of the keep-alive state is greater than the third duration threshold, the wearing level is changed to be raised by one step. The third duration threshold is less than the first duration threshold. Illustratively, the third duration threshold is 3 seconds.

It should be noted that, after the duration of the keep-alive state is longer than the third duration threshold, the accumulated duration of the activity may be continued, and when the duration of the keep-alive state reaches another duration threshold higher than the third duration threshold, the wearing level may be further increased by one step, for example, when the duration of the keep-alive state reaches twice the third duration threshold, the wearing level may be further increased by one step.

4.15) when the intensity level of the optical signal is a fourth intensity level, the duration of the static state is greater than a fourth time threshold, and the posture of the wearable device is a side-lying or flat-lying posture, the wearing level is changed to be decreased by one step. Illustratively, the fourth time threshold is 3600 seconds.

When the light signal intensity level is the fourth intensity level, it can be directly stated to some extent that the wearable device is in a wearing state. However, it is possible that the wearable device is taken off by the user and placed on a plane having a color similar to human skin, or worn on a cylindrical object, the light signal intensity level may also be the fourth intensity level. In this scheme, when the duration of the static state is longer than the fourth time threshold, and the posture of the wearable device is a side-lying or flat-lying posture, the wearing grade is reduced, and the false recognition under the condition can be reduced to a certain extent.

It should be noted that, after the duration of the still state is longer than the fourth duration threshold, the accumulated still duration may be continued, and when the duration of the still state reaches another duration threshold higher than the fourth duration threshold, the wearing level may be further decreased by one step, for example, when the accumulated still duration reaches twice the fourth duration threshold, the wearing level may be further decreased by one step.

4.2) determining the wearing state of the wearable device according to the wearing grade of the wearable device.

It should be noted that, because the power consumption of the optical sensor in the wearable device is large, if the optical sensor is turned on all the time, the power is wasted. Therefore, in the above two embodiments, the switch state of the optical sensor can also be determined according to the motion state of the wearable device, so that the optical sensor is turned on when the optical signal needs to be collected by the optical sensor, and the optical sensor is turned off when the optical signal does not need to be collected, thereby saving the electric energy of the wearable device and prolonging the endurance time of the wearable device. Specifically, please refer to fig. 6. The wearing identification method provided by the application can further comprise the following steps: determining the switch state of the optical sensor according to the motion state of the wearable device, specifically comprising the following steps:

s401, judging whether the wearable device is switched from a static state to an active state.

When the optical sensor is in the closed state, whether the wearable device is switched from the static state to the active state is judged. Specifically, referring to step S201 and step S203 in the foregoing embodiment, it may be determined whether the wearable device is switched from the stationary state to the active state by acquiring the duration of the stationary state and/or the active state. For example, when the duration of remaining in the stationary state is cleared, it may be determined that the wearable device is switched from the stationary state to the active state. Alternatively, when the duration of remaining active begins to accumulate, it may be determined that the wearable device switches from a stationary state to an active state.

S402, turning off the optical sensor.

If the wearable device is not switched from the static state to the active state. That is, the optical sensor is maintained in an off state while the wearable device remains stationary at all times. When the wearable device remains stationary at all times, the wearable device is probably in an unworn state, or worn by the user but the user is asleep, in which case turning off the optical sensor may conserve power.

And S403, turning on the optical sensor.

And if the wearable equipment is switched from the static state to the active state, the optical sensor is started. When the wearable device is switched from the static state to the active state, the wearable device starts to move, and the optical sensor is turned on to detect the physiological parameters of the user.

S404, judging whether the duration of the wearable device keeping still is larger than a fifth duration threshold.

And when the optical sensor is in an open state, judging whether the duration of the wearable device kept still is greater than a fifth duration threshold. The value of the fifth duration threshold may range between 60 seconds and 1800 seconds.

S405, keeping the optical sensor on.

If the duration that the wearable device remains stationary is not greater than the fifth duration threshold. It is indicated that the wearable device remains stationary for a short period of time, possibly only intermittent movements of the user, and the optical sensor may be kept on to avoid missing detection of the physiological parameter of the user.

S406, turning off the optical sensor.

If the duration that the wearable device remains still is greater than the fifth duration threshold, it indicates that the duration that the wearable device remains still is longer, and the wearable device is less likely to be worn. If continuously open optical sensor then teach extravagant electric energy, close this optical sensor and can practice thrift the electric energy, prolong wearable equipment's time of endurance.

The wearing identification method provided by the application can also determine the on-off state of the optical sensor according to the motion state of the wearable device, so that the optical sensor is turned on when the optical signal needs to be collected by the optical sensor, and the optical sensor is turned off when the optical signal does not need to be collected, thereby saving the electric energy of the wearable device and prolonging the endurance time of the wearable device.

The present application further provides a wearable device comprising a motion sensor and an optical sensor, the wearable device being configured to perform the wear identification method or steps of any of the above embodiments. The method or steps are understood with reference to the above method embodiments and will not be described herein again. Referring to fig. 7, the wearable device includes:

and a motion sensor 501 for detecting motion data. An optical sensor 502 for detecting an optical signal. A feature extraction module 503, configured to determine a motion state of the wearable device according to the motion data, where the motion state includes a static state and an active state. A wearing state identification module 504, configured to determine a wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal.

The wearing state identification module 504 is specifically configured to adjust a wearing level of the wearable device according to a duration of the wearable device remaining in the stationary state and/or the active state and an intensity level of the light signal. And determining the wearing state of the wearable device according to the wearing grade. Wherein the wearing state of the wearable device comprises a worn state and an unworn state, each wearing state comprises at least 1 wearing grade, and the wearing grade is configured to be higher and closer to the worn state, and the lower the wearing grade, the unworn state.

The intensity level of the optical signal is configured to: the intensity of the optical signal is less than or equal to the first intensity threshold as a first intensity level, and the intensity of the optical signal is greater than the first intensity threshold and less than or equal to the second intensity threshold as a second intensity level. The intensity of the optical signal is greater than the second intensity threshold and less than or equal to the third intensity threshold as a third intensity level, and the intensity of the optical signal is greater than the third intensity threshold as a fourth intensity level. The first intensity threshold is the maximum signal intensity of the reflected light received by the optical sensor when the wearable device is placed on the side, the second intensity threshold is the maximum signal intensity of the reflected light received by the optical sensor when the wearable device is placed on the side, and the third intensity threshold is the minimum signal intensity of the reflected light received by the optical sensor when the wearable device is worn on the human body.

Further, the wearing state identification module 504 is configured to reduce the wearing level of the wearable device by one step when the intensity level of the light signal is the first intensity level. And when the intensity level of the light signal is the second intensity level and the duration of the wearable device in the static state is greater than the first duration threshold, reducing the wearing level of the wearable device by one level. And when the intensity level of the optical signal is a third intensity level and the duration of the wearable device in the static state is greater than a second duration threshold, reducing the wearing level of the wearable device by one level. And when the intensity level of the optical signal is the fourth intensity level and the duration of the wearable device in the active state is greater than the third duration threshold, increasing the wearing level of the wearable device by one level.

The feature extraction module 503 is further configured to determine a posture of the wearable device according to the motion data. The wearing state identification module 504 is further configured to adjust a wearing level of the wearable device according to the intensity of the light signal, the posture of the wearable device, and the motion state of the wearable device.

Specifically, the wearing state identification module 504 is configured to reduce the wearing level of the wearable device by one level when the intensity level of the optical signal is a fourth intensity level, the posture of the wearable device is a side-lying or flat-lying posture, and the duration of the wearable device remaining in the stationary state is greater than a fourth time threshold.

In one embodiment, the motion sensor 501 is an acceleration sensor, and the feature extraction module 503 is specifically configured to determine a motion state of the wearable device according to amplitudes of three axes of the acceleration sensor.

In one embodiment, the optical sensor 502 is an infrared light sensor, and the feature extraction module 503 is specifically configured to determine the light intensity level of the light signal according to a minimum value of the reflected light within a preset time period of the infrared light sensor.

In one embodiment, the wearable device may further include a power consumption control module (not shown in fig. 7) for determining a switching state of the optical sensor according to the motion state of the wearable device. Specifically, when the optical sensor is in an on state and the duration of the wearable device remaining in a static state is greater than a fifth duration threshold, the optical sensor is turned off; when the optical sensor is in the off state and the wearable device is switched from the static state to the active state, the optical sensor is turned on.

The present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the wear identification method described above.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear identification method applied to a wearable device including a motion sensor and an optical sensor for detecting a physiological parameter, the method comprising:

acquiring motion data detected by the motion sensor and an optical signal detected by the optical sensor;

determining a motion state of the wearable device from the motion data, the motion state comprising a stationary state and an active state;

determining the wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal.

2. The wear identification method according to claim 1, wherein the determining the wearing state of the wearable device according to the motion state of the wearable device and the intensity of the light signal comprises:

adjusting a wearing level of the wearable device according to the duration of the wearable device remaining in a static state and/or an active state and the intensity level of the light signal;

determining a wearing state of the wearable device according to the wearing level, wherein the wearing state of the wearable device comprises a worn state and an unworn state, each wearing state comprises at least 1 wearing level, and the wearing level is configured to be higher in level and closer to be identified as the worn state, and the lower in wearing level and closer to be identified as the unworn state.

3. The wear identification method according to claim 2,

the intensity level of the light signal is configured to: the intensity of the optical signal is less than or equal to a first intensity threshold value and is a first intensity level, the intensity of the optical signal is greater than the first intensity threshold value and less than or equal to a second intensity threshold value and is a second intensity level, the intensity of the optical signal is greater than the second intensity threshold value and less than or equal to a third intensity threshold value and is a third intensity level, the intensity of the optical signal is greater than the third intensity threshold value and is a fourth intensity level,

the first intensity threshold is the maximum signal intensity of the reflected light received by the optical sensor when the wearable device is placed on the side, the second intensity threshold is the maximum signal intensity of the reflected light received by the optical sensor when the wearable device is placed on the side, and the third intensity threshold is the minimum signal intensity of the reflected light received by the optical sensor when the wearable device is worn on the human body.

4. The wear identification method according to claim 3, wherein the adjusting the wear level of the wearable device comprises:

when the intensity level of the light signal is a first intensity level, reducing the wearing level of the wearable device by one level;

when the intensity level of the optical signal is a second intensity level and the duration of the wearable device in the static state is greater than a first duration threshold, reducing the wearing level of the wearable device by one level;

and when the intensity level of the optical signal is a third intensity level and the duration of the wearable device in the static state is greater than a second duration threshold, reducing the wearing level of the wearable device by one level.

5. The wear identification method according to claim 3, wherein the adjusting the wear level of the wearable device comprises:

and when the intensity level of the optical signal is a fourth intensity level and the duration of the wearable device in the active state is greater than a third duration threshold, increasing the wearing level of the wearable device by one level.

6. The wear identification method according to claim 3, characterized in that the method further comprises:

determining a pose of the wearable device from the motion data;

adjusting a wearing level of the wearable device according to the intensity of the light signal, the posture of the wearable device and the motion state of the wearable device.

7. The wear identification method of claim 6, wherein the adjusting the wear level of the wearable device comprises:

and when the intensity level of the optical signal is a fourth intensity level, the posture of the wearable device is a side-lying or flat-lying posture, and the duration of the wearable device in a static state is longer than a fourth time threshold, the wearing level of the wearable device is reduced by one level.

8. The wear identification method of claim 6, wherein the motion sensor is an acceleration sensor, and wherein determining the motion state of the wearable device from the motion data comprises:

and determining the motion state of the wearable device according to the amplitudes of the three axes of the acceleration sensor.

9. The wear identification method according to claim 1, wherein the optical sensor is an infrared light sensor, the method further comprising:

and determining the light intensity level of the optical signal according to the minimum value of the reflected light in the preset time period of the infrared light sensor.

10. The wear identification method according to claim 1, characterized in that the method further comprises:

determining a switch state of the optical sensor according to the motion state of the wearable device.

11. The wear identification method of claim 10, wherein the determining the switch state of the optical sensor according to the motion state of the wearable device comprises:

when the optical sensor is in an on state and the duration of the wearable device keeping in a static state is greater than a fifth duration threshold, turning off the optical sensor; when the optical sensor is in an off state and the wearable device is switched from a stationary state to an active state, the optical sensor is turned on.

12. A wearable device, characterized in that the wearable device comprises:

a motion sensor for detecting motion data;

an optical sensor for detecting an optical signal;

a feature extraction module to determine a motion state of the wearable device from the motion data, the motion state including a stationary state and an active state;

and the wearing state identification module is used for determining the wearing state of the wearable equipment according to the motion state of the wearable equipment and the intensity of the optical signal.

13. Wearable device, characterized in that it comprises a processor and a memory, said memory storing a computer program executable by said processor, said computer program, when executed by said processor, implementing the wear identification method according to any one of claims 1-11.

14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a wear identification method according to any one of claims 1 to 11.