Wearable device and wearing state detection method

Abstract

The application discloses a wearable device and a wearing state detection method. The wearable device comprises a host and a photoelectric module. The photoelectric module is arranged on the host and comprises a light emitting unit and a light receiving unit. The photoelectric module is used for controlling the light emitting unit to emit a light signal in a first working mode, and determining target physical data according to a light reflection signal received by the light receiving unit. The photoelectric module is also used for receiving infrared radiation energy through the light receiving unit in a second working mode, and determining first temperature data according to the infrared radiation energy. A processor is connected with the photoelectric module, and the wearing state of the wearable device is determined according to the target physical data and the first temperature data. The wearable device can accurately detect the wearing state of the wearable device, and the detection of the physical data of the user and the temperature detection are realized by multiplexing the light receiving unit in the photoelectric module, so that the miniaturization design of the wearable device can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wearable devices, in particular to a wearable device and a wearing state detection method. BACKGROUND

[0002] With the popularity of wearable technology, more and more users begin to use wearable devices to monitor personal health and safety information. However, in the actual use process, due to various reasons, the user may take off the wearable device and forget to wear it again, which to some extent weakens the monitoring function of the wearable device. Therefore, how to accurately detect the wearing state of the wearable device has become a technical problem to be solved. SUMMARY

[0003] The embodiments of the present application disclose a wearable device and a wearing state detection method, which can accurately detect the wearing state of the wearable device, and the detection of the physical data and the temperature detection of the user are realized by multiplexing the light receiving unit in the photoelectric module, so that the miniaturization design of the wearable device can be realized.

[0004] A first aspect of the embodiments of the present application discloses a wearable device, comprising:

[0005] a host;

[0006] a photoelectric module arranged in the host, the photoelectric module comprising a light emitting unit and a light receiving unit;

[0007] the photoelectric module is configured to control the light emitting unit to emit a light signal when in a first working mode, and determine target physical data according to a light reflection signal received by the light receiving unit;

[0008] the photoelectric module is further configured to receive infrared radiation energy through the light receiving unit when in a second working mode, and determine first temperature data according to the infrared radiation energy;

[0009] a processor connected with the photoelectric module, the processor being configured to determine a wearing state of the wearable device according to the target physical data and the first temperature data.

[0010] In some possible embodiments, the photoelectric module further comprises a control unit connected with the light receiving unit;

[0011] the control unit is configured to determine the target physical data according to a first electric signal corresponding to the light reflection signal received by the light receiving unit when the photoelectric module is in the first working mode;

[0012] The control unit is further configured to determine the first temperature data according to a second electric signal corresponding to the infrared radiation energy received by the light receiving unit when the optoelectronic module is in the second working mode.

[0013] In some possible embodiments, the control unit includes a first controller and a second controller, and the first controller and the second controller are connected to the light receiving unit respectively.

[0014] The first controller is configured to acquire a first electric signal corresponding to a light reflection signal received by the light receiving unit when the optoelectronic module is in the first working mode, and determine the target sign data according to the first electric signal.

[0015] The second controller is configured to acquire a second electric signal corresponding to the infrared radiation energy received by the light receiving unit when the optoelectronic module is in the second working mode, and determine the first temperature data according to the second electric signal.

[0016] In some possible embodiments, the optoelectronic module further includes a switch module, and the switch module is connected to the first controller, the second controller, and the light receiving unit respectively.

[0017] The switch module is configured to be in a first conduction state to turn on a path between the light receiving unit and the first controller when the optoelectronic module is in the first working mode.

[0018] The switch module is further configured to be in a second conduction state to turn on a path between the light receiving unit and the second controller when the optoelectronic module is in the second working mode.

[0019] In some possible embodiments, the switch module includes a first switch and a second switch, and the first switch is connected to the first controller, the second controller, and a first end of the light receiving unit respectively, and the second switch is connected to the first controller, the second controller, and a second end of the light receiving unit respectively.

[0020] The switch module being in the first conduction state includes that the first switch turns on the path between the first end of the light receiving unit and the first controller, and the second switch turns on the path between the second end of the light receiving unit and the first controller.

[0021] The switch module being in the second conduction state includes that the first switch turns on the path between the first end of the light receiving unit and the second controller, and the second switch turns on the path between the second end of the light receiving unit and the second controller.

[0022] In some possible embodiments, the processor is further configured to control the optoelectronic module to work in the first working mode, acquire the target sign data, and control the optoelectronic module to switch to the second working mode if the target sign data is in a target sign interval.

[0023] In some possible embodiments, the optoelectronic module comprises a photoplethysmography (PPG) module.

[0024] The light receiving unit comprises an infrared photodiode.

[0025] In some possible embodiments, the optoelectronic module is further configured to control the light emitting unit not to emit the light signal when the optoelectronic module is in the second working mode.

[0026] In some possible embodiments, the wearable device further comprises a temperature sensor.

[0027] The temperature sensor is configured to acquire second temperature data of an environment in which the wearable device is located.

[0028] The processor is further configured to compare the second temperature data with the first temperature data, and determine a wearing state of the wearable device.

[0029] A second aspect of the embodiments of the present application discloses a wearing state detection method, applied to a wearable device, the wearable device comprising a host and an optoelectronic module, the optoelectronic module being arranged on the host, the optoelectronic module comprising a light emitting unit and a light receiving unit; the method comprising:

[0030] When the optoelectronic module is in a first working mode, the light emitting unit is controlled to emit a light signal by the optoelectronic module, and target sign data is determined according to a light reflection signal received by the light receiving unit.

[0031] When the optoelectronic module is in a second working mode, infrared radiation energy is received by the light receiving unit of the optoelectronic module, and first temperature data is determined according to the infrared radiation energy.

[0032] The wearing state of the wearable device is determined according to the target sign data and the first temperature data.

[0033] A third aspect of the embodiments of the present application discloses a computer readable storage medium, having a computer program stored thereon, the computer program being executed by a processor in an electronic device, so that the electronic device implements the method described in the second aspect above.

[0034] The fourth aspect of the embodiments of the present application discloses a computer program product containing instructions, which, when the instructions of the computer program product are executed on a computer, cause the computer to execute the method described in the second aspect.

[0035] The wearable device provided in the embodiments of the present application and the wearing state detection method, the wearable device comprises a host, a photoelectric module and a processor, wherein the photoelectric module is arranged on the host, the photoelectric module comprises a light emitting unit and a light receiving unit, the photoelectric module is used for controlling the light emitting unit to emit a light signal in a first working mode, and determining target physical data according to a light reflection signal received by the light receiving unit, and the photoelectric module is also used for receiving infrared radiation energy through the light receiving unit in a second working mode, and determining first temperature data according to the infrared radiation energy; the processor is connected with the photoelectric module, and the processor is used for determining the wearing state of the wearable device according to the target physical data and the first temperature data. In the embodiments of the present application, the processor can determine the wearing state of the wearable device according to the target physical data and the first temperature data. Compared with the temperature detection mode using the contact type temperature sensor in the prior art, the first temperature data in the embodiments of the present application is determined according to the infrared radiation energy detected by the photoelectric module, the detected first temperature data is more accurate, the accuracy of detecting the wearing state of the wearable device is improved, and in addition, the photoelectric module determines the target physical data and the first temperature data by multiplexing the light receiving unit, which can realize the miniaturization design of the wearable device and reduce the cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0037] Figure 1 An application scenario diagram of a wearable device provided in the embodiments of the present application is shown in FIG. 1.

[0038] Figure 2 A structural block diagram of a wearable device provided in the embodiments of the present application is shown in FIG. 2.

[0039] Figure 3 A structural schematic diagram of a photoelectric module 120 provided in the embodiments of the present application is shown in FIG. 3.

[0040] Figure 4a A structural block diagram of another wearable device provided in the embodiments of the present application is shown in FIG. 4.

[0041] Figure 4b A structural schematic diagram of a control unit 123 provided in the embodiments of the present application is shown in FIG. 5.

[0042] Figure 5a A structure block diagram of another wearable device provided by an embodiment of the present application is provided;

[0043] Figure 5b A structure schematic diagram of a switch module 124 provided by an embodiment of the present application in the photoelectric module 120 is provided;

[0044] Figure 6 A structure schematic diagram of a switch module provided by an embodiment of the present application is a double-pole double-throw switch structure diagram controlled by high and low levels of supply voltage;

[0045] Figure 7 A structure schematic diagram of a PPG module of a smart bracelet provided by an embodiment of the present application is provided;

[0046] Figure 8 A flowchart of a wearing state detection method provided by an embodiment of the present application is provided;

[0047] Figure 9 A flowchart of another wearing state detection method provided by an embodiment of the present application is provided. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0049] It should be noted that the terms “include” and “have” and any variations thereof in the embodiments of the present application and the drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed or can optionally include other steps or units inherent to the process, method, product or device.

[0050] In addition, "at least one" means one or more, "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b and c, can represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.

[0051] At present, many wearable devices support wearing state detection function to remind the user of the current wearing state of the wearable device. The existing wearing state detection scheme mainly uses the combination of multiple sensors such as accelerometers, gyroscopes, heart rate sensors, temperature sensors and pressure sensors to measure multiple physiological signals of the user to comprehensively judge whether the wearable device is worn on the user. However, in the case of loose wearing of the wearable device, the sensors that need to contact the user may produce errors due to poor contact or weak signals, thereby directly affecting the accuracy of the wearing state detection.

[0052] The embodiment of the present application discloses a wearable device and a wearing state detection method, which can accurately detect the wearing state of the wearable device, and the detection of the user's vital sign data and temperature detection is through the light receiving unit in the multiplexing photoelectric module, which can realize the miniaturization design of the wearable device.

[0053] Figure 1 An application scenario of a wearable device provided by the embodiment of the present application is shown in FIG. 1. Figure 1 As shown in FIG. 1, the wearable device 100 can include a host 110, a photoelectric module 120 and a wearing assembly 130, the photoelectric module 120 is arranged on the host 110, and the wearable device 100 is worn on the user through the wearing assembly 130.

[0054] The wearable device 100 can include but is not limited to a smart watch, a smart bracelet, earphones, glasses and the like.

[0055] The host 110 can refer to the body part of the wearable device 100, and the host 110 can include but is not limited to a processor, a memory, a battery and the like. The host 110 can be responsible for processing data, executing programs, storing information and communicating with other components or external devices.

[0056] The optoelectronic module 120 can refer to a component that converts a received optical signal into an electrical signal, and then converts the electrical signal into a physiological signal. The optoelectronic module 120 can include a light emitting unit and a light receiving unit, wherein the light emitting unit is used to generate an optical signal of emitted light, and the light receiving unit is used to receive an optical signal of reflected light corresponding to the emitted light to generate an electrical signal.

[0057] The optoelectronic module 120 can be disposed on the host 110, for example, can be disposed on the back of the host 110, wherein the back of the host 110 can refer to the surface close to the user's skin when the wearable device 100 is worn on the user's hand.

[0058] The optoelectronic module 120 can include a first working mode and a second working mode. When the optoelectronic module 120 is in the first working mode, the light emitting unit 121 can be controlled to emit an optical signal, and the target physiological data can be determined according to the optical reflection signal received by the light receiving unit 122; when the optoelectronic module 120 is in the second working mode, the infrared radiation energy can be received by the light receiving unit 122, and the first temperature data can be determined according to the infrared radiation energy.

[0059] The wearing component 130 can refer to a component that fixes the wearable device 100 to the user's body, and the shape and size of the wearing component 130 can correspond to the type of the wearable device 100, for example, when the wearable device 100 is a smart watch, the wearing component 130 can be a watchband, and when the wearable device 100 is glasses, the wearing component 130 can be a frame.

[0060] The wearable device 100 can obtain the target physiological data and the first temperature data of the user through the first working mode and the second working mode of the optoelectronic module 120, respectively, and then can determine the wearing state of the wearable device 100 through the above data.

[0061] Figure 2 A structural block diagram of a wearable device is provided for the embodiments of the present application. As shown in Figure 2 The wearable device 100 can include a host 110, an optoelectronic module 120, and a processor 140, and the optoelectronic module 120 includes a light receiving unit 122 and a light emitting unit 121.

[0062] The optoelectronic module 120 can be disposed on the host. The optoelectronic module 120 can be connected with the processor 140, and the connection can be direct connection or indirect connection in a non-contact manner.

[0063] The light emitting unit 121 can be used to emit one or more wavelengths of optical signals.

[0064] Optionally, the light emitting unit 121 can include one or more light emitting units 121 that can be used to emit light signals of at least one wavelength, such as one or more of red light, green light, or infrared light, etc. The light emitting unit 121 can include, but is not limited to, a light emitting diode (LED), a laser diode (LD), or an organic light emitting diode (OLED), etc.

[0065] The light receiving unit 122 can be used to receive a light reflection signal corresponding to the light signal emitted by the light emitting unit 121. When the light receiving unit 122 receives the light reflection signal, the electrical conductivity of the semiconductor inside the light receiving unit 122 changes or a photovoltaic electromotive force is generated, i.e., an internal photoelectric effect occurs, thereby generating an electrical signal corresponding to the light reflection signal. The light receiving unit 122 can include, but is not limited to, a photo-diode (PD) or a photodetector, etc.

[0066] In the embodiments of the present application, the light receiving unit 122 can also be used to receive infrared radiation energy. Infrared radiation is a kind of electromagnetic wave with lower frequency, and its wavelength range is usually between 0.76-1000 microns, and objects above absolute zero will emit infrared radiation energy. The wavelength range of the light signal that the light receiving unit 122 in the embodiments of the present application can receive includes the wavelength range of infrared, so the light receiving unit 122 can receive infrared radiation energy. Similarly, when the light receiving unit 122 receives infrared radiation energy, an internal photoelectric effect also occurs, thereby generating an electrical signal corresponding to the infrared radiation energy.

[0067] In some embodiments, the optoelectronic module 120 includes a photoplethysmography (PPG) module; and the light receiving unit 122 includes an infrared photo-diode.

[0068] The PPG module can refer to an optoelectronic module that indirectly measures vital data such as heart rate, blood oxygen saturation, etc. by detecting changes in light absorption or scattering of human tissues.

[0069] The infrared photo-diode can refer to a photo-diode that can convert infrared radiation energy into an electrical signal. In the PPG module, the infrared PD as a light receiving unit can receive light reflection signals or infrared radiation energy reflected or scattered by human tissues, and convert them into corresponding electrical signals for subsequent processing by the PPG module.

[0070] It should be understood that PPG modules typically use light signals such as green light, red light, or infrared light to measure target feature data. Therefore, infrared PDs not only need to be able to receive infrared radiation energy, but also need to be able to receive visible light reflection signals.

[0071] Optionally, the infrared PD may include an indium gallium arsenide photodiode (InGaAs-PD). The sensitivity range of an InGaAs-PD is typically between 500 nm and 1700 nm, covering the wavelengths of green, red, and part of the infrared spectrum. Therefore, an InGaAs-PD can receive reflected light signals from visible light such as green and red, as well as infrared radiation energy. Alternatively, the infrared PD may also be other types of PDs, as long as it can receive both visible light such as green and red, and infrared radiation energy; no specific limitations are imposed here.

[0072] For example, Figure 3 This is a schematic diagram of the structure of an optoelectronic module 120 provided in an embodiment of this application. Figure 3 As shown, the optoelectronic module 120 may include multiple LEDs and an infrared PD. The multiple LEDs can serve as light emitting units, and the infrared PD can serve as light receiving units.

[0073] By designing the optoelectronic module 120 to include a PPG module and the light receiving unit 122 to include an infrared PD, the light receiving unit 122 can receive both reflected light signals and infrared radiation energy. The optoelectronic module 120 can detect both the user's vital signs and temperature. This allows the wearable device 100 to reuse the light receiving unit 122 in the optoelectronic module 120 for wear detection, which is beneficial for achieving the miniaturization design of the wearable device 100.

[0074] The optoelectronic module 120 is used to control the light emitting unit 121 to emit light signals when in a first operating mode, and to determine target vital sign data based on the light reflection signals received by the light receiving unit 122. The optoelectronic module is also used to receive infrared radiation energy through the light receiving unit 122 when in a second operating mode, and to determine first temperature data based on the infrared radiation energy.

[0075] The photoelectric module 120 may include a first working mode and a second working mode. The first working mode may refer to the working mode in which the photoelectric module 120 is used to detect the user's vital signs, and the second working mode may refer to the working mode in which the photoelectric module 120 is used to detect the user's temperature.

[0076] In a case where the optoelectronic module 120 is in the first working mode, the optoelectronic module 120 can control the light emitting unit 121 to emit a light signal, for example, the light emitting unit 121 can be controlled to emit a light signal of green light, red light, or infrared light, etc. The light signal can be reflected or scattered by the surface of the human body, and the light receiving unit 122 can receive the reflected or scattered light signal. The optoelectronic module 120 can determine the target sign data according to the light signal received by the light receiving unit 122.

[0077] The target sign data can refer to index data reflecting the physiological state of the user, and the target sign data can include one or more of heart rate, blood oxygen saturation, blood pressure, etc.

[0078] The light receiving unit 122 can generate a corresponding first electrical signal through internal photoelectric effect according to the received light signal, and the optoelectronic module 120 can extract the relevant information of physiological activity corresponding to the target sign data according to the first electrical signal, and then determine the target sign data according to a specific algorithm.

[0079] For example, in a case where the target sign data is heart rate, the light receiving unit 122 can generate a series of voltage signals that change over time according to the received light signal, and then the optoelectronic module 120 can identify the periodic change of the signal caused by the heartbeat, i.e. the pulse wave, and measure the time interval between adjacent pulse waves, thereby accurately calculating the heart rate value.

[0080] In a case where the optoelectronic module 120 is in the second working mode, the light receiving unit 122 can receive infrared radiation energy. Since various forms of matter will emit infrared radiation energy according to their temperature, the light receiving unit 122 can receive infrared radiation energy, and the optoelectronic module 120 can determine the first temperature data according to the infrared radiation energy.

[0081] After receiving the infrared radiation energy, the optoelectronic module 120 can generate a corresponding second electrical signal according to internal photoelectric effect. Since the infrared radiation energy is proportional to the inherent temperature of the object, the second electrical signal can be a output signal proportional to the temperature of the object, and the optoelectronic module 120 can determine the first temperature data according to the second electrical signal.

[0082] In some embodiments, the optoelectronic module 120 is also used to control the light emitting unit 121 not to emit a light signal in the second working mode.

[0083] When the optoelectronic module 120 is in the second working mode, the optoelectronic module 120 only needs the light receiving unit 122 to receive the infrared radiation energy, and does not need the light emitting unit 121 to emit the infrared light signal. Therefore, the optoelectronic module 120 can control the light emitting unit 121 to emit the light signal in the first working mode, and control the light emitting unit 121 not to emit the light signal in the second working mode.

[0084] By the design that the light emitting unit 121 does not emit the light signal when the optoelectronic module 120 is in the second working mode, not only the unnecessary energy consumption of the light emitting unit 121 in the second working mode can be avoided, but also the influence of the light reflection signal on the received infrared radiation energy received by the light receiving unit 122 can be avoided, so that the first temperature data can be accurately obtained, and the accuracy of detecting the wearing state of the wearable device 100 can be improved.

[0085] The processor 140 can be configured to determine the wearing state of the wearable device 100 according to the target feature data and the first temperature data.

[0086] The processor 140 can determine whether the target feature data is in the target feature interval, and determine whether the first temperature data is in the target temperature interval, so as to determine the wearing state of the wearable device 100.

[0087] Specifically, only when the target feature data is in the target feature interval and the first temperature data is in the target temperature interval, the processor 140 can determine that the wearable device 100 is in the worn state, otherwise, if either the target feature data or the first temperature data is not in the corresponding interval, the processor 140 can determine that the wearable device 100 is in the unworn state. By combining the target feature data and the first temperature data to determine the wearing state of the wearable device, compared with single data, the misjudgment of the wearing state of the wearable device can be reduced, and the detection accuracy of the wearing state of the wearable device can be improved.

[0088] In some embodiments, the processor 140 is further configured to control the optoelectronic module 120 to work in the first working mode, and obtain the target feature data, and if the target feature data is in the target feature interval, control the optoelectronic module 120 to switch to the second working mode.

[0089] The processor 140 can control the optoelectronic module 120 to switch between the first working mode and the second working mode according to whether the obtained target feature data is in the target feature interval, if the target feature data is not in the target feature interval, control the optoelectronic module 120 to continue to maintain the first working mode, and if the target feature data is in the target feature interval, control the optoelectronic module 120 to switch to the second working mode.

[0090] It can be understood that the processor 140 can preliminarily determine the wearing state of the wearable device 100 according to whether the target sign data is in the target sign interval, and then control the photoelectric module 120 whether to switch from the first working mode to the second working mode. If the target sign data is not in the target sign interval, it can be indicated that the wearable device 100 can be in an unworn state or the target sign data obtained is abnormal, at this time the processor 140 can control the photoelectric module 120 to continue to maintain in the first working mode, and reacquire the target sign data for further determination.

[0091] After the processor 140 confirms that the target sign data is in the target sign interval, the processor 140 can control the photoelectric module 120 to switch from the first working mode to the second working mode to acquire the first temperature data, and according to the first temperature data, determine the wearing state of the wearable device 100 again.

[0092] Exemplarily, the target sign data can include heart rate data. After the processor 140 receives the heart rate data determined by the photoelectric module 120, the processor 140 can detect whether the heart rate data is in a target heart rate interval of 40-220 times per minute, if not in the target heart rate interval, it can be preliminarily determined that the wearable device 100 is in an unworn state, and control the photoelectric module 120 to continue to maintain in the first working mode to reacquire the heart rate data; if it is in the target heart rate interval, it can control the photoelectric module 120 to switch to the second working mode to perform temperature measurement.

[0093] Through the above design that the processor 140 can control the photoelectric module 120 to switch to the second working mode according to whether the target sign data is in the target sign interval, the processor 140 can first acquire the target sign data, and then acquire the first temperature data, which not only can avoid unnecessary energy consumption of the wearable device 100, but also can improve the detection accuracy of the wearing state of the wearable device according to double determination.

[0094] In the embodiments of the present application, the processor can determine the wearing state of the wearable device according to the target sign data and the first temperature data, which not only can reduce the misjudgment of the wearing state of the wearable device and improve the detection accuracy of the wearing state of the wearable device, but also can realize the miniaturization design of the wearable device and reduce the cost through the photoelectric module which determines the target sign data and the first temperature data by multiplexing the light receiving unit.

[0095] In some embodiments, as shown in FIG. 1, the wearable device 100 can include a photoelectric module 120, a processor 140, and a memory 150. Figure 4a As shown in FIG. 2, the photoelectric module 120 can include a light receiving unit 122, a light emitting unit 121, and a control unit 123, and the control unit 123 can be connected with the light receiving unit 122.

[0096] The control unit 123 is configured to determine target sign data according to a first electric signal corresponding to a light reflection signal received by the light receiving unit 122 when the optoelectronic module 120 is in a first working mode. The control unit 123 is further configured to determine first temperature data according to a second electric signal corresponding to infrared radiation energy received by the light receiving unit 122 when the optoelectronic module 120 is in a second working mode.

[0097] The control unit 123 can be an analog front end. The analog front end can refer to an analog system integrating an analog to digital converter (ADC), an amplifier, a reference source, an excitation circuit, and a modem circuit, etc. The AFE can amplify a weak current signal and convert it into a digital signal, and then perform filtering, smoothing, and other data processing methods to finally generate a required digital signal. Therefore, in the case of the control unit 123 and the light receiving unit 122, the control unit 123 can determine corresponding target sign data or first temperature data according to the first electric signal or the second electric signal generated by the light receiving unit 122 after amplification, filtering, smoothing, and other data processing methods.

[0098] Further, the control unit 123 can be connected with the light emitting unit 121 and the processor 140 respectively. The control unit 123 is connected with the light emitting unit 121, so that the control unit 123 can control the light emitting unit 121 to emit a light signal in the second working mode of the optoelectronic module 120, and the control unit 123 can control the light emitting unit 121 not to emit a light signal in the second working mode of the optoelectronic module 120.

[0099] The control unit 123 is connected with the processor 140, so that the target sign data and the first temperature data generated by the control unit 123 can be transmitted to the processor 140, so that the processor 140 can determine the wearing state of the wearable device 100 according to the target sign data and the first temperature data.

[0100] Through the above design that the optoelectronic module 120 further includes the control unit 123, the optoelectronic module 120 has the ability to efficiently process a weak current signal generated by the light receiving unit 122, so that the optoelectronic module 120 can accurately obtain target sign data and first temperature data, and the processor 140 can accurately determine the wearing state of the wearable device 100 according to the target sign data and the first temperature data.

[0101] Figure 4b A structural diagram of the control unit 123 provided by the embodiments of the present application is shown in FIG. 6. As shown in FIG. 6, the control unit 123 includes an amplifier 1231, a filter 1232, and a smoothing unit 1233. Figure 4bAs shown, the control unit 123 can include a first controller 1231 and a second controller 1232, and the first controller 1231 and the second controller 1232 are connected with the light receiving unit 122 respectively. The first controller 1231 is configured to acquire a first electric signal corresponding to the light reflection signal received by the light receiving unit 122 when the optoelectronic module 120 is in the first working mode, and determine the target sign data according to the first electric signal. The second controller 1232 is further configured to acquire a second electric signal corresponding to the infrared radiation energy received by the light receiving unit 122 when the optoelectronic module 120 is in the second working mode, and determine the first temperature data according to the second electric signal.

[0102] The first controller 1231 can be a first analog front end, and the second controller 1232 can be a second analog front end. After receiving the light reflection signal, the first controller 1231 generates a corresponding first electric signal according to the internal photoelectric effect, and then converts the first electric signal from an analog signal form to a digital signal form through an ADC in the first controller 1231, and then can acquire the information related to the physiological activity corresponding to the target sign data according to the digital signal form of the first electric signal, so as to determine the target sign data.

[0103] Similarly, after receiving the infrared radiation energy, the second controller 1232 generates a corresponding second electric signal according to the internal photoelectric effect, and after converting the second electric signal into a digital signal form through an ADC in the second controller 1232, the first temperature data can be determined according to the proportional relationship between the infrared radiation energy and the inherent temperature of the object.

[0104] In the embodiments of the present application, by dividing the control unit 123 into the first controller 1231 and the second controller 1232, and the first controller 1231 is configured to determine the target sign data according to the first electric signal corresponding to the light reflection signal, and the second controller 1232 is configured to determine the first temperature data according to the second electric signal corresponding to the infrared radiation energy, so that each controller can focus on its specific working mode, and the overall efficiency and response speed of the wearable device 100 are improved.

[0105] In some embodiments, as shown, Figure 5a As shown, the optoelectronic module 120 can further include a switch module 124, and the switch module 124 is connected with the first controller 1231, the second controller 1232 and the light receiving unit 122 respectively. The switch module 124 is configured to be in a first conduction state to conduct a path between the light receiving unit 122 and the first controller 1231 when the optoelectronic module 120 is in the first working mode. The switch module 124 is further configured to be in a second conduction state to conduct a path between the light receiving unit 122 and the second controller 1232 when the optoelectronic module 120 is in the second working mode.

[0106] The switch module 124 can include a first conduction state and a second conduction state. The first conduction state can refer to a state in which the optoelectronic module 120 is in the first working mode, and the path between the light receiving unit 122 and the first controller 1231 is turned on. The second conduction state can refer to a state in which the optoelectronic module 120 is in the second working mode, and the path between the light receiving unit 122 and the second controller 1232 is turned on. Therefore, the first working mode of the optoelectronic module 120 corresponds to the first conduction state of the switch module 124, and the second working mode of the optoelectronic module 120 corresponds to the second conduction state of the switch module 124.

[0107] Further, the processor 140 can control the switch module 124 to switch between the first conduction state and the second conduction state, so as to switch the optoelectronic module 120 between the first working mode and the second working mode.

[0108] Through the above design of the switch module 124 in the optoelectronic module 120, the optoelectronic module 120 can be switched between the first working mode and the second working mode according to the conduction state of the switch module 124. Not only can unnecessary energy consumption of the wearable device 100 be avoided, but also the working mode of the optoelectronic module 120 can be accurately switched, and the accuracy of the optoelectronic module 120 in acquiring the target physical data or the first temperature data can be improved.

[0109] Figure 5b The switch module 124 provided by the embodiments of the present application is shown in the structural schematic diagram of the optoelectronic module 120. As shown in the figure, Figure 5b The switch module 124 includes a first switch 1241 and a second switch 1242. The first switch 1241 is connected with the first controller 1231, the second controller 1232, and the first end of the light receiving unit 122, respectively. The second switch 1242 is connected with the first controller 1231, the second controller 1232, and the second end of the light receiving unit 122, respectively.

[0110] It can be understood that in the optoelectronic module 120, both ends of the light receiving unit 122 need to be connected with the first controller 1231 or the second controller 1232 to form a complete circuit loop, so that the optoelectronic module 120 meets the working requirements of the first working mode or the second working mode. Therefore, in the case that the optoelectronic module 120 is provided with the switch module 124, a switch needs to be arranged at both ends of the light receiving unit 122, so that both ends of the light receiving unit 122 can be simultaneously switched and connected with the same controller, thereby forming a complete circuit loop.

[0111] As Figure 5bAs shown, the switch module 124 can include a first conduction state and a second conduction state. When the switch module 124 is in the first conduction state, the first switch 1241 conducts a path between the first end of the light receiving unit 122 and the first controller 1231, and the second switch 1242 conducts a path between the second end of the light receiving unit 122 and the first controller 1231. When the switch module 124 is in the second conduction state, the first switch 1241 conducts a path between the first end of the light receiving unit 122 and the second controller 1232, and the second switch 1242 conducts a path between the second end of the light receiving unit 122 and the second controller 1232.

[0112] Further, the switch module 124 can be a double-pole double-throw switch controlled by the high and low levels of the power supply voltage, and the switch module 124 is in the first conduction state by default. Figure 6 The switch module provided by the embodiments of the present application is a double-pole double-throw switch controlled by the high and low levels of the power supply voltage. As shown in FIG. 3, the switch module 124 includes a control pin INA, two common terminals (Common, COM for short), two normally closed terminals (Normally Closed, NC for short), and two normally open terminals (Normally Open, NO for short). Figure 6 As shown, the switch module 124 has a control pin INA of the switch module 124, two common terminals (Common, COM for short), two normally closed terminals (Normally Closed, NC for short), and two normally open terminals (Normally Open, NO for short). Among them, COM1 and COM2 can represent the first end and the second end of the light receiving unit 122, NC1 and NC2 can represent the two ends of the conduction path corresponding to the first end and the second end of the light receiving unit 122 when the light receiving unit 122 is conducted with the first controller 1231, and NO1 and NO2 can represent the two ends of the conduction path corresponding to the first end and the second end of the light receiving unit 122 when the light receiving unit 122 is conducted with the second controller 1232.

[0113] Table 1 shows the control and gating of the switch module 124 according to the high and low levels of the circuit power supply voltage. As shown in Table 1, when the circuit power supply voltage Vcc is at a high level, INA is 1 at this time, the switch module 124 is in the first conduction state, COM1 is closed to NC1, and COM2 is closed to NC2, so that the light receiving unit 122 is conducted with the first controller 1231; when the circuit power supply voltage Vcc is at a low level, INA is 0, the switch module 124 is in the second conduction state, COM2 is closed to NO1, and COM2 is closed to NO2, so that the light receiving unit 122 is conducted with the second controller 1232.

[0114] Table 1

[0115]

[0116] Alternatively, the switch module 124 can also be other types of double-pole double-throw switches.

[0117] In the embodiment of the present application, the switch module 124 including the first switch 1241 and the second switch 1242 is designed, so that the connection between the light receiving unit 122 and different controllers is realized, so that the optoelectronic module 120 can be switched to the corresponding working mode according to the conduction state of the switch module 124, thereby meeting the multiple requirements of the wearable device 100. In addition, since the conduction state of the switch module 124 is switched by the high and low levels of the circuit power supply voltage, unnecessary energy consumption can be avoided, the dependence on external control signals is reduced, the control logic of the wearable device 100 is simplified, and the stability and reliability of the wearable device 100 are improved.

[0118] In some embodiments, the wearable device 100 further includes a temperature sensor; the temperature sensor is configured to acquire second temperature data of an environment in which the wearable device 100 is located; and the processor 140 is further configured to compare the second temperature data with the first temperature data to further determine the wearing state of the wearable device 100.

[0119] After the wearable device 100 acquires the target physical data and the first temperature data, the processor 140 can acquire second temperature data of an environment in which the wearable device 100 is located according to the temperature sensor, and further determine the wearing state of the wearable device 100.

[0120] In the case that the first temperature data and the second temperature data are the same, the processor 140 can consider that the light receiving unit 122 of the optoelectronic module 120 acquires the environmental temperature data, that is, the optoelectronic module 120 deviates from the wearing part of the wearable device 100, and thus it can be determined that the wearable device 100 is in an unworn state.

[0121] In the case that the first temperature data and the second temperature data are different, the processor 140 can consider that the light receiving unit 122 of the optoelectronic module 120 acquires the human body temperature data, that is, the wearable device 100 is still close to the user, and thus it can be determined that the wearable device 100 is in a worn state.

[0122] The temperature sensor can be arranged on the host 110, for example, on the front or side of the host 110. The temperature sensor can include, but is not limited to, a thermocouple temperature sensor, an infrared temperature sensor, or a thermistor temperature sensor, etc.

[0123] In the embodiment of the present application, the second temperature data of the wearable device 100 can be acquired by the temperature sensor, so that the processor 140 can eliminate the potential interference of the environmental temperature on the detection result of the wearing state by the second temperature data and the first temperature data in the case that the wearable device 100 has initially determined the wearing state, and further determine the wearing state of the wearable device 100, which helps to improve the accuracy of the detection of the wearing state of the wearable device 100.

[0124] In some embodiments, the wearable device can further comprise a prompting module. The prompting module is configured to prompt the user when the wearable device 100 is in the unworn state.

[0125] The prompting module can be connected to the processor 140. The prompting module can generate prompting information according to the indication of the processor 140 after the processor 140 determines the wearing state of the wearable device 100. The prompting information can be used to prompt the user that the wearable device is currently in the unworn state.

[0126] Optionally, the prompting module can generate the prompting information after the processor 140 acquires the target sign data to preliminarily determine the wearing state of the wearable device 100. The prompting module can also generate the prompting information after the processor 140 acquires the first temperature data and determines the wearing state of the wearable device 100. The prompting module can also generate the prompting information after the processor 140 determines the wearing state of the wearable device 100 according to whether the first temperature data and the second temperature data are consistent, but is not limited thereto.

[0127] Optionally, the prompting module can be a display or the like, which can remind the user that the wearable device 100 is in the current wearing state through a graphic text form of the prompting information. The prompting module can also be a loudspeaker or the like, which can remind the user through an audio form. The prompting module can also be a buzzer or the like, which can remind the user through a vibration form, but is not limited thereto.

[0128] In the embodiments of the present application, the prompting module reminds the user that the wearable device 100 is in the unworn state, so that the user can discover that the wearable device 100 is in the unworn state in time, thereby wearing the wearable device 100 in time, avoiding the problems such as function failure or data record loss caused by forgetting to wear the wearable device 100, and making the user receive the reminder of the wearing state of the wearable device 100 in time, which greatly improves the practicability and user experience of the wearable device 100.

[0129] The present application will be further described below by taking a smart bracelet as an example of the wearable device.

[0130] Figure 7 A structure diagram of a PPG module of a smart bracelet according to an embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the smart bracelet comprises a PPG module 1000, a processor 140, a first temperature sensor 110, a second temperature sensor 120, a third temperature sensor 130, a prompting module, and a power supply 150. Figure 7As shown, the smart bracelet 700 can include a host and a PPG module 710 composed of a PD 711, a set of LEDs 712, a first analog front end 713, a second analog front end 714, a first switch 715 and a second switch 716. The set of LEDs 712 can generally include three LEDs, which can be a red light LED, a green light LED and an infrared light LED respectively, wherein the red light LED and the infrared light LED can be used for blood oxygen saturation measurement, and the green light LED can be used for heart rate measurement; the first analog front end 713 can be a first controller for determining target vital sign data, and the second analog front end 714 can be a second controller for determining first temperature data.

[0131] When the PPG module 710 is in the first working mode, the first switch 715 and the second switch 716 are in the first conduction state by default, and the PPG module 710 can control one or more of the three LEDs to emit light signals, and the light signals emitted by the LEDs irradiate the skin, part of the emitted light signals is absorbed by blood and tissue during penetration of the skin, and the transmitted light or reflected light is received by the PD 711. After the PD 711 converts the received transmitted light or reflected light into a first electrical signal, the first analog front end 713 can determine the corresponding PPG signal data according to the first electrical signal.

[0132] After the processor of the smart bracelet 700 determines that the PPG signal data is in the corresponding target vital sign interval, the first switch 715 and the second switch 716 are controlled to switch to the second conduction state, thereby controlling the PPG module 710 to switch to the second working mode. Subsequently, the processor can control all the three LEDs 712 not to emit light, use the PD 711 to receive infrared radiation energy and convert it into a second electrical signal, and the second analog front end 714 can generate corresponding first temperature data according to the second electrical signal. The processor of the smart bracelet 700 can determine the wearing state of the smart bracelet 700 according to the PPG signal data and the first temperature data.

[0133] Figure 8 A flowchart of a wearing state detection method provided by an embodiment of the present application. The wearing state detection method is applied to a wearable device, and the wearable device includes a host and a photoelectric module. The photoelectric module is arranged on the host, and the photoelectric module includes a light emitting unit and a light receiving unit. As shown in the figure, the method specifically includes the following steps: Figure 8

[0134] Step 801, in the case that the photoelectric module is in a first working mode, controlling the light emitting unit to emit light signals through the photoelectric module, and determining target vital sign data according to light reflection signals received by the light receiving unit.

[0135] ​In step 803, the infrared radiation energy is received by the light receiving unit of the optoelectronic module in the second working mode, and the first temperature data is determined according to the infrared radiation energy.

[0136] The optoelectronic module can receive the light reflection signal to determine the target sign data in the first working mode and receive the infrared radiation energy to determine the first temperature data in the second working mode by multiplexing the same light receiving unit.

[0137] In step 805, the wearing state of the wearable device is determined according to the target sign data and the first temperature data.

[0138] The processor can preliminarily determine the wearing state of the wearable device according to whether the target sign data is in the target sign interval, and further determine the wearing state of the wearable device according to whether the first temperature data is in the target temperature interval.

[0139] For example, the processor can preliminarily determine the wearing state of the wearable device according to whether the heart rate data is in the target heart rate interval of 40-200 times per minute, and further determine the wearing state of the wearable device according to whether the first temperature data is in the target temperature interval of 30-42℃.

[0140] In the embodiments of the present application, the light receiving unit of the optoelectronic module is multiplexed, so that the optoelectronic module can determine the target sign data in the first working mode and determine the first temperature data in the second working mode. Not only can the wearing state of the wearable device be effectively detected by the target sign data and the first temperature data, but also the bottom of the wearable device can be miniaturized.

[0141] Figure 9 The flow chart of another wearing state detection method provided by the embodiments of the present application is shown in FIG. 9. Figure 9 As shown in FIG. 9, the method comprises the following steps:

[0142] In step 902, the light emitting unit is controlled to emit the light signal by the optoelectronic module in the first working mode, and the target sign data is determined according to the light reflection signal received by the light receiving unit.

[0143] In step 904, it is determined whether the target sign data is in the target sign interval. If not, step 902 is performed; if yes, step 906 is performed.

[0144] The processor can make a first determination according to whether the target sign data is in the target sign interval. If the target sign data is not in the target sign interval, step 902 is performed to reacquire the target sign data; if the target sign data is in the target sign interval, the optoelectronic module is controlled to switch to the second working mode.

[0145] Optionally, if the target sign data is not in the target sign interval, the processor can determine that the wearable device is in the unworn state, and execute step 902 to reacquire the target sign data.

[0146] Optionally, the processor can execute step 902 immediately, or can execute step 902 after an interval of a predetermined time period, for example, 1 minute, 5 minutes, or 10 minutes, etc. The length of the predetermined time period can be set as needed. It can be understood that when a subsequent step needs to repeat a previous step, the corresponding step can be executed after an interval of a predetermined time period, and the details are not described herein.

[0147] Step 906: controlling the optoelectronic module to be in a second working mode, receiving infrared radiation energy through the light receiving unit of the optoelectronic module, and determining first temperature data according to the infrared radiation energy.

[0148] Step 908: determining whether the first temperature data is in a target temperature interval. If not, step 906 is executed. If yes, step 910 is executed.

[0149] The processor can make a second determination according to whether the first temperature data is in the target temperature interval. If not, step 906 is executed to reacquire the first temperature data. If yes, second temperature data of an environment in which the wearable device is located is detected by a temperature sensor.

[0150] Optionally, if the first temperature data is not in the target temperature interval, the processor can determine that the wearable device is in the unworn state, and execute step 906 to reacquire the first temperature data.

[0151] Step 910: detecting second temperature data of an environment in which the wearable device is located by a temperature sensor.

[0152] In the case where the processor determines that the first temperature data is in the target temperature interval, the temperature sensor is controlled to be turned on to detect second temperature data of an environment in which the wearable device is located.

[0153] The temperature sensor is only used to acquire the second temperature data of the environment in which the wearable device is located, and is not used to acquire other temperature data.

[0154] Optionally, the first temperature data determined by the optoelectronic module and the second temperature data acquired by the temperature sensor are both relative temperatures.

[0155] Step 912: determining whether the first temperature data and the second temperature data are the same. If yes, step 914 is executed. If not, step 916 is executed.

[0156] The processor can make a third judgment according to whether the first temperature data and the second temperature data are the same, if the same, it is considered that the first temperature data obtained by the photoelectric module is the ambient temperature data, that is, the wearable device is not worn tightly or is not worn, if not the same, it is determined that the wearing state of the wearable device is the worn state.

[0157] In step 914, it is determined that the wearing state of the wearable device is the unworn state.

[0158] In the case that it is determined that the wearing state of the wearable device is the unworn state, step 902 can be executed to re-start to acquire the target vital sign data, step 906 can be executed to re-acquire the first temperature data, and step 910 can be executed to re-acquire the second temperature data, but are not limited thereto.

[0159] In step 916, it is determined that the wearing state of the wearable device is the worn state.

[0160] In the embodiments of the present application, through the triple judgment of the target vital sign data, the first temperature data and the second temperature data, not only the wearing state of the wearable device can be accurately identified, but also the miniaturization and low-power operation of the wearable device are further realized through the multiplexing of the light receiving unit of the photoelectric module, the switching of the working mode, and the opening and closing of the temperature sensor.

[0161] The embodiments of the present application disclose a computer readable storage medium storing a computer program, wherein the computer program is executed by a processor to make the processor realize one or more steps in any one of the above methods.

[0162] The embodiments of the present application disclose a computer program product including a computer program, and the computer program is executed by a processor to make the processor realize one or more steps in any one of the above methods.

[0163] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the program can be stored in a non-volatile computer readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments. The storage medium can be a magnetic disk, an optical disk, a ROM, etc.

[0164] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wearable device, comprising: The method comprises the following steps: A host; An optoelectronic module is arranged on the host, and the optoelectronic module comprises a light emitting unit and a light receiving unit; In a first working mode, the optoelectronic module controls the light emitting unit to emit a light signal, and determines target sign data according to a light reflection signal received by the light receiving unit; In a second working mode, the optoelectronic module receives infrared radiation energy through the light receiving unit, and determines first temperature data according to the infrared radiation energy, wherein the light receiving unit in the second working mode is the same as the light receiving unit in the first working mode; The light receiving unit comprises an infrared photodiode, which is used to receive a light reflection signal corresponding to visible light or infrared light and the infrared radiation energy; A processor is connected to the optoelectronic module, and the processor is used to determine a wearing state of the wearable device according to the target sign data and the first temperature data.

2. The wearable device of claim 1, wherein, The optoelectronic module further comprises a control unit connected to the light receiving unit; In the first working mode, the control unit determines the target sign data according to a first electric signal corresponding to the light reflection signal received by the light receiving unit; In the second working mode, the control unit determines the first temperature data according to a second electric signal corresponding to the infrared radiation energy received by the light receiving unit.

3. The wearable device of claim 2, wherein, The control unit comprises a first controller and a second controller, and the first controller and the second controller are respectively connected to the light receiving unit; In the first working mode, the first controller acquires the first electric signal corresponding to the light reflection signal received by the light receiving unit, and determines the target sign data according to the first electric signal; In the second working mode, the second controller acquires the second electric signal corresponding to the infrared radiation energy received by the light receiving unit, and determines the first temperature data according to the second electric signal.

4. The wearable device of claim 3, wherein, The optoelectronic module further comprises a switch module connected to the first controller, the second controller and the light receiving unit; In the first working mode, the switch module is in a first conduction state to turn on a path between the light receiving unit and the first controller; In the second working mode, the switch module is in a second conduction state to turn on a path between the light receiving unit and the second controller.

5. The wearable device of claim 4, wherein, The switch module comprises a first switch and a second switch, the first switch is connected to the first controller, the second controller and a first end of the light receiving unit, and the second switch is connected to the first controller, the second controller and a second end of the light receiving unit. The switch module is in a first conduction state, including: the first switch conducting a path between the first end of the light receiving unit and the first controller, and the second switch conducting a path between the second end of the light receiving unit and the first controller; The switch module is in a second conduction state, including: the first switch conducting a path between the first end of the light receiving unit and the second controller, and the second switch conducting a path between the second end of the light receiving unit and the second controller.

6. The wearable device of claim 1, wherein, The processor is further configured to control the optoelectronic module to work in the first working mode and acquire the target sign data, and if the target sign data is in a target sign interval, control the optoelectronic module to switch to the second working mode.

7. The wearable device of claim 1, wherein, The optoelectronic module includes a photoelectric plethysmography (PPG) module.

8. The wearable device of claim 1, wherein, The optoelectronic module is further configured to control the light emitting unit not to emit the light signal when the optoelectronic module is in the second working mode.

9. The wearable device of any of claims 1-8, wherein, The wearable device further includes a temperature sensor. The temperature sensor is configured to acquire second temperature data of an environment in which the wearable device is located. The processor is further configured to compare the second temperature data with the first temperature data to determine a wearing state of the wearable device.

10. A wearing state detection method characterized by comprising: The method is applied to a wearable device, the wearable device including a host and an optoelectronic module, the optoelectronic module being arranged on the host, and the optoelectronic module including a light emitting unit and a light receiving unit. When the optoelectronic module is in a first working mode, the light emitting unit emits a light signal, and target sign data is determined according to a light reflection signal received by the light receiving unit; When the optoelectronic module is in a second working mode, infrared radiation energy is received by the light receiving unit of the optoelectronic module, and first temperature data is determined according to the infrared radiation energy, the light receiving unit in the second working mode being the same as the light receiving unit in the first working mode; the light receiving unit includes an infrared photodiode, the infrared photodiode being configured to receive a light reflection signal corresponding to visible light or infrared light, and the infrared radiation energy; A wearing state of the wearable device is determined according to the target sign data and the first temperature data.

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