Wearable device and wearing detection method thereof

Abstract

The present invention discloses a wearable device and a wearing detection method thereof, which determines whether the wearable device is in motion according to the detection signal of a motion sensor; if in motion, determines whether the wearable device keeps contact with the human body within a preset first time according to the detection signal of a human body detector; if the contact is kept, determines that the wearable device is in a wearing state; if the contact is not kept, determines that the wearable device is not in a wearing state. It can be seen that the present application combines the detection signal of the motion sensor and the detection signal of the human body detector for wearing detection, which is equivalent to setting a double detection condition. Only when both detection conditions are met can it be determined that the wearable device is in a wearing state, thereby improving the accuracy of wearing detection; moreover, the motion sensor and the human body detector themselves have very low power consumption, which can effectively save the power of the device.

Description

Technical Field

[0001] The present invention relates to the field of wearing detection of wearable devices, and in particular to a wearable device and a wearing detection method thereof. Background Art

[0002] Most existing wearable devices have a wearing detection function. Currently, the wearing detection of wearable devices usually adopts the following solutions:

[0003] Wearable devices are equipped with infrared distance sensors to perform wearing detection based on the infrared distance sensors. Specifically, the infrared distance sensor is used to detect the distance between the wearable device and the human body. When the distance between the device and the human body is less than a certain value, the device is considered to be worn; when the distance between the device and the human body is not less than a certain value, the device is considered to be taken off. However, when the user takes off the wearable device and brings it close to an object, it may be mistakenly detected as being worn, resulting in reduced accuracy of wearing detection.

[0004] Therefore, how to provide a solution to the above technical problems is a problem that technicians in this field need to solve at present. Summary of the invention

[0005] The purpose of the present invention is to provide a wearable device and a wearing detection method thereof, which combines the detection signal of a motion sensor and the detection signal of a human detector to perform wearing detection, which is equivalent to setting a dual detection condition. Only when both detection conditions are met can it be determined that the wearable device is in a wearing state, thereby improving the accuracy of wearing detection; moreover, the motion sensor and the human detector themselves have very low power consumption, which can effectively save device power.

[0006] In order to solve the above technical problems, the present invention provides a wearing detection method, which is applied to a wearable device including a motion sensor and a human body detector, comprising:

[0007] Determining whether the wearable device is in motion according to the detection signal of the motion sensor;

[0008] If the wearable device is in motion, judging whether the wearable device is in continuous contact with the human body within a preset first time according to the detection signal of the human body detector;

[0009] If the contact is maintained continuously, it is determined that the wearable device is in a wearing state;

[0010] If the contact is not maintained continuously, it is determined that the wearable device is not in a wearing state.

[0011] Preferably, the wearing detection method further comprises:

[0012] When it is determined that the wearable device is in motion, controlling the wearable device to switch from a standby mode to a normal working mode;

[0013] When it is determined that the wearable device is in a wearing state, controlling the wearable device to continue to maintain a normal working mode;

[0014] When it is determined that the wearable device is not in the wearing state, the wearable device is controlled to return to the standby mode.

[0015] Preferably, the motion sensor is a three-axis motion sensor;

[0016] The process of determining whether the wearable device is in motion according to the detection signal of the motion sensor includes:

[0017] Acquire the linear acceleration of the wearable device detected by the three-axis motion sensor;

[0018] Determining whether the linear acceleration is greater than a preset first acceleration threshold;

[0019] If yes, it is determined that the wearable device is in motion;

[0020] If not, it is determined that the wearable device is not in motion.

[0021] Preferably, the motion sensor is a six-axis motion sensor;

[0022] The process of determining whether the wearable device is in motion according to the detection signal of the motion sensor includes:

[0023] Acquire the linear acceleration and angular acceleration of the wearable device detected by the six-axis motion sensor;

[0024] Determining whether the linear acceleration is greater than a preset first acceleration threshold or whether the angular acceleration is greater than a preset second acceleration threshold;

[0025] If yes, it is determined that the wearable device is in motion;

[0026] If not, it is determined that the wearable device is not in motion.

[0027] Preferably, the human body detector is an impedance sensor, and the impedance sensor comprises two electrodes provided on the bottom shell of the wearable device;

[0028] The process of determining whether the wearable device is in continuous contact with the human body within a preset first time according to the detection signal of the human body detector includes:

[0029] Acquiring the impedance between the two electrodes detected by the impedance sensor;

[0030] Determine whether the impedance is reduced to the Ω level and stabilized at the Ω level within a preset first time;

[0031] If so, determining that the wearable device is in continuous contact with the human body within a preset first time;

[0032] If not, it is determined that the wearable device does not maintain continuous contact with the human body within the preset first time.

[0033] Preferably, after determining that the wearable device is in a wearing state, the wearing detection method further includes:

[0034] If the impedance is at the Ω level, it is determined that the wearable device is still in the wearing state.

[0035] Preferably, after determining that the wearable device is in a wearing state, the wearing detection method further includes:

[0036] If the impedance increases to the MΩ level and stabilizes at the MΩ level within a preset second time, judging whether the wearable device is in motion according to the detection signal of the motion sensor;

[0037] If not, it is determined that the wearable device is restored to a not-worn state.

[0038] Preferably, the wearing detection method further comprises:

[0039] When it is determined that the wearable device is restored to the unworn state, the wearable device is controlled to switch from the normal working mode to the standby mode.

[0040] In order to solve the above technical problems, the present invention further provides a wearable device, including a motion sensor and a human body detector, and further including:

[0041] A controller is used to implement the steps of any of the above-mentioned wearing detection methods when executing a computer program stored in the controller.

[0042] Preferably, the wearable device is a wristband device.

[0043] The present invention provides a wearing detection method, which is applied to a wearable device including a motion sensor and a human detector, including: judging whether the wearable device is in motion according to the detection signal of the motion sensor; if in motion, judging whether the wearable device keeps contact with the human body within a preset first time according to the detection signal of the human detector; if the contact is kept, determining that the wearable device is in a wearing state; if the contact is not kept, determining that the wearable device is not in a wearing state. It can be seen that the present application combines the detection signal of the motion sensor and the detection signal of the human detector for wearing detection, which is equivalent to setting a double detection condition. Only when both detection conditions are met can it be determined that the wearable device is in a wearing state, thereby improving the accuracy of wearing detection; moreover, the motion sensor and the human detector themselves have very low power consumption, which can effectively save device power.

[0044] The present invention also provides a wearable device, which has the same beneficial effects as the above-mentioned wearing detection method. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 A flowchart of a wearing detection method provided by an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of the structure of a wearable device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The core of the present invention is to provide a wearable device and a wearing detection method thereof, which combines the detection signal of the motion sensor and the detection signal of the human body detector to perform wearing detection, which is equivalent to setting a dual detection condition. Only when both detection conditions are met can it be determined that the wearable device is in a wearing state, thereby improving the accuracy of wearing detection; moreover, the motion sensor and the human body detector themselves have very low power consumption, which can effectively save device power.

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Please refer to Figure 1 , Figure 1 The present invention provides a flowchart of a wearing detection method according to an embodiment of the present invention.

[0051] The wearing detection method is applied to a wearable device including a motion sensor and a human body detector, including:

[0052] Step S1: Determine whether the wearable device is in motion based on the detection signal of the motion sensor; if so, execute step S2.

[0053] Step S2: According to the detection signal of the human body detector, determine whether the wearable device maintains continuous contact with the human body within a preset first time; if so, execute step S3; if not, execute step S4.

[0054] Step S3: Determine whether the wearable device is in a wearing state.

[0055] Step S4: Determine whether the wearable device is not in a worn state.

[0056] Specifically, the wearable device (such as a wristband device such as a watch or a bracelet) of the present application includes a motion sensor and a human detector. The motion sensor is used to detect the motion state of the wearable device, and the human detector is used to detect the contact state between the wearable device and the human body.

[0057] Based on this, the wearing detection principle of the wearable device of the present application is (the initial state of the wearable device is the unworn state): according to the detection signal of the motion sensor on the wearable device, it is judged whether the wearable device is in a moving state. If the wearable device is not in a moving state (that is, it remains stationary), it means that the user is not wearing the wearable device, and there is no need to perform further wearing detection of the wearable device; if the wearable device is in a moving state, it means that the user may be wearing the wearable device, and it is necessary to perform further wearing detection of the wearable device, then according to the detection signal of the human body detector on the wearable device, it is judged whether the wearable device is in continuous contact with the human body within a preset first time (such as 10s). If the wearable device is in continuous contact with the human body within the preset first time, it means that the user has worn the wearable device, and it is determined that the wearable device is in a wearing state; if the wearable device is not in continuous contact with the human body within the preset first time, it means that the user is not wearing the wearable device, and it is determined that the wearable device is not in a wearing state.

[0058] It should be noted that the first time is set to prevent the user from picking up the wearable device and putting it back, in which case it is still judged as not being worn.

[0059] It can be seen that the present application combines the detection signal of the motion sensor and the detection signal of the human body detector for wearing detection, which is equivalent to setting a dual detection condition. Only when both detection conditions are met is it determined that the wearable device is in a wearing state, thereby improving the accuracy of wearing detection; moreover, the motion sensor and the human body detector themselves have very low power consumption, which can effectively save device power.

[0060] Based on the above embodiments:

[0061] As an optional embodiment, the wearing detection method further includes:

[0062] When it is determined that the wearable device is in motion, controlling the wearable device to switch from a standby mode to a normal working mode;

[0063] When it is determined that the wearable device is in a wearing state, controlling the wearable device to continue to maintain a normal working mode;

[0064] When it is determined that the wearable device is not in the wearing state, the wearable device is controlled to return to the standby mode.

[0065] Furthermore, the mode control principle of the wearable device of the present application is: when the wearable device is not in a worn state, the wearable device is in a low-power standby mode. The present application determines whether the wearable device is in motion based on the detection signal of the motion sensor on the wearable device. If it is in motion, the wearable device is controlled to switch from low-power standby mode to normal working mode. If the present application ultimately determines that the wearable device is in a worn state, the wearable device is controlled to continue to be in a normal working mode; if it is ultimately determined that the wearable device is not in a worn state, the wearable device is controlled to return to a low-power standby mode, thereby ensuring that the wearable device enters a normal working mode only when the wearable device is in a worn state, otherwise it is always in a low-power standby mode, thereby effectively saving device power.

[0066] As an optional embodiment, the motion sensor is a three-axis motion sensor;

[0067] The process of determining whether the wearable device is in motion according to the detection signal of the motion sensor includes:

[0068] Get the linear acceleration of the wearable device detected by the three-axis motion sensor;

[0069] Determine whether the linear acceleration is greater than a preset first acceleration threshold;

[0070] If yes, it is determined that the wearable device is in motion;

[0071] If not, it is determined that the wearable device is not in motion.

[0072] Specifically, the motion sensor of the present application can select a three-axis motion sensor, which is used to detect the linear acceleration of the wearable device. Based on this, the detection process of the motion state of the wearable device is: obtain the linear acceleration of the wearable device detected by the three-axis motion sensor, and then determine whether the linear acceleration of the wearable device is greater than a preset first acceleration threshold. If it is greater than the preset first acceleration threshold, it means that the wearable device is moving, and it is determined that the wearable device is in motion; if it is not greater than the preset first acceleration threshold, it means that the wearable device is not moving, and it is determined that the wearable device is not in motion.

[0073] As an optional embodiment, the motion sensor is a six-axis motion sensor;

[0074] The process of determining whether the wearable device is in motion according to the detection signal of the motion sensor includes:

[0075] Obtain the linear acceleration and angular acceleration of the wearable device detected by the six-axis motion sensor;

[0076] Determine whether the linear acceleration is greater than a preset first acceleration threshold or whether the angular acceleration is greater than a preset second acceleration threshold;

[0077] If yes, it is determined that the wearable device is in motion;

[0078] If not, it is determined that the wearable device is not in motion.

[0079] Specifically, the motion sensor of the present application may also use a six-axis motion sensor with higher accuracy. The six-axis motion sensor is used to detect the linear acceleration and angular acceleration of the wearable device. Based on this, the detection process of the motion state of the wearable device is: obtain the linear acceleration and angular acceleration of the wearable device detected by the six-axis motion sensor, and then determine whether the linear acceleration of the wearable device is greater than a preset first acceleration threshold or whether the angular acceleration is greater than a preset second acceleration threshold. If so, it means that the wearable device is moving, and it is determined that the wearable device is in motion; if not, it means that the wearable device is not moving, and it is determined that the wearable device is not in motion.

[0080] It should be noted that there are three situations in which the wearable device is in motion: 1) the linear acceleration of the wearable device is greater than the preset first acceleration threshold, and the angular acceleration of the wearable device is not greater than the preset second acceleration threshold; 2) the angular acceleration of the wearable device is greater than the preset second acceleration threshold, and the linear acceleration of the wearable device is not greater than the preset first acceleration threshold; 3) the linear acceleration of the wearable device is greater than the preset first acceleration threshold, and the angular acceleration of the wearable device is greater than the preset second acceleration threshold. There is only one situation in which the wearable device is not in motion: the linear acceleration of the wearable device is not greater than the preset first acceleration threshold, and the angular acceleration of the wearable device is not greater than the preset second acceleration threshold.

[0081] As an optional embodiment, the human body detector is an impedance sensor, and the impedance sensor includes two electrodes arranged on the bottom shell of the wearable device;

[0082] The process of determining whether the wearable device is in continuous contact with the human body within a preset first time according to the detection signal of the human body detector includes:

[0083] Obtaining the impedance between two electrodes detected by the impedance sensor;

[0084] Determine whether the impedance is reduced to the Ω level and stabilized at the Ω level within a preset first time;

[0085] If so, it is determined that the wearable device is in continuous contact with the human body within the preset first time;

[0086] If not, it is determined that the wearable device does not maintain continuous contact with the human body within the preset first time.

[0087] Specifically, the human body detector of the present application may use an impedance sensor (BIO-Z sensor), which includes two electrodes (as inputs of the impedance sensor), and the two electrodes are arranged on the bottom shell (bottom of the shell) of the wearable device. When the user wears the wearable device, the two electrodes are in contact with the human skin, and the impedance between the two electrodes is at the Ω level (such as 100Ω); when the user takes off the wearable device, the two electrodes are away from the human skin, and the circuit between the two electrodes is usually disconnected, and the impedance between the two electrodes is at the MΩ level.

[0088] Based on this, the wearing detection principle corresponding to the impedance sensor is: obtain the impedance between the two electrodes detected by the impedance sensor, and then determine whether the impedance between the two electrodes decreases from the MΩ level to the Ω level and stabilizes at the Ω level within the preset first time. If the impedance between the two electrodes decreases from the MΩ level to the Ω level and stabilizes at the Ω level within the preset first time, it is determined that the wearable device continues to maintain contact with the human body within the preset first time, which means that the user has worn the wearable device; if the impedance between the two electrodes does not decrease from the MΩ level to the Ω level (that is, the impedance is stable at the MΩ level), or the impedance between the two electrodes decreases from the MΩ level to the Ω level but does not stabilize at the Ω level within the preset first time (such as the user picks up the wearable device and puts it back), it is determined that the wearable device does not continue to maintain contact with the human body within the preset first time, which means that the user is not wearing the wearable device.

[0089] It should be noted that, in addition to the impedance sensor, any human body detector that can detect biological characteristics through two electrodes can be used, and this application does not make any special limitation here.

[0090] As an optional embodiment, after determining that the wearable device is in a wearing state, the wearing detection method further includes:

[0091] If the impedance is at the Ω level, it is determined that the wearable device is still being worn.

[0092] Furthermore, after determining that the wearable device is in a worn state, the present application continues to obtain the impedance between the two electrodes detected by the impedance sensor. If the impedance between the two electrodes is at the Ω level, regardless of whether the motion sensor can detect the motion state of the wearable device, it is considered that the wearable device is still in a worn state.

[0093] As an optional embodiment, after determining that the wearable device is in a wearing state, the wearing detection method further includes:

[0094] If the impedance increases to the MΩ level and stabilizes at the MΩ level within the preset second time, it is determined whether the wearable device is in motion according to the detection signal of the motion sensor;

[0095] If not, it is determined that the wearable device is restored to a non-worn state.

[0096] Furthermore, considering that when the user takes off the wearable device, the two electrodes are away from the human skin, the impedance between the two electrodes increases from the Ω level to the MΩ level. Therefore, after determining that the wearable device is in the worn state, the present application continues to obtain the impedance between the two electrodes detected by the impedance sensor. If the impedance between the two electrodes increases from the Ω level to the MΩ level and stabilizes at the MΩ level within a preset second time (such as 10s), if the motion state of the wearable device cannot be detected based on the motion sensor, it means that the user has taken off the wearable device, and it is determined that the wearable device has recovered from the worn state to the unworn state.

[0097] It should be noted that the second time is set to prevent the wearable device from occasionally leaving the human body. For example, when exercising, the shell of the wearable device temporarily leaves the human body, causing the impedance between the electrodes to increase. In this case, it is still judged as being in the wearing state.

[0098] As an optional embodiment, the wearing detection method further includes:

[0099] When it is determined that the wearable device is restored to the unworn state, the wearable device is controlled to switch from the normal working mode to the standby mode.

[0100] Furthermore, when determining that the wearable device is restored from a worn state to a non-worn state, the present application controls the wearable device to switch from a normal working mode to a low-power standby mode, thereby ensuring that when the wearable device is taken off, the wearable device returns to the low-power standby mode, effectively saving device power.

[0101] It should be noted that the wearable device is also equipped with a controller, and control chips such as MCU (Microcontroller Unit), SOC (System on Chip), AP (application process), FPGA (Field Programmable Gate Array), and DSP (Digital Signal Processing) can be selected. The controller is used to implement the steps of any of the above-mentioned wearing detection methods when executing the computer program stored in itself.

[0102] In addition, other functional modules may be provided in the wearable device, such as a heart rate module for measuring heart rate, a vibration module including a motor, a display module including a display screen, etc. It should be noted that in order to perform wearing detection, the motion sensor is always in working state, and the remaining modules in the wearable device (such as the controller, human body detector and other functional modules) can enter a low-power standby mode when the device is not worn.

[0103] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of a wearable device provided by an embodiment of the present invention.

[0104] The wearable device includes a motion sensor 1 and a human body detector 2, and further includes:

[0105] The controller 3 is used to implement the steps of any of the above-mentioned wearing detection methods when executing the computer program stored in the controller 3.

[0106] As an optional embodiment, the wearable device is a wristband device.

[0107] For an introduction to the wearable device provided in this application, please refer to the embodiment of the wearing detection method described above, and this application will not go into details here.

[0108] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0109] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wearing detection method, characterized in that: Applications include wearable devices that include motion sensors and human body detectors, including: Determining whether the wearable device is in motion according to the detection signal of the motion sensor; If the wearable device is in motion, judging whether the wearable device is in continuous contact with the human body within a preset first time according to the detection signal of the human body detector; If the contact is maintained continuously, it is determined that the wearable device is in a wearing state; If the contact is not maintained continuously, it is determined that the wearable device is not in a worn state; Wherein, the motion sensor is a three-axis motion sensor or a six-axis motion sensor, and the human body detector is an impedance sensor; When the motion sensor is a three-axis motion sensor, the process of determining whether the wearable device is in motion according to a detection signal of the motion sensor includes: Acquire the linear acceleration of the wearable device detected by the three-axis motion sensor; Determining whether the linear acceleration is greater than a preset first acceleration threshold; If yes, it is determined that the wearable device is in motion; If not, it is determined that the wearable device is not in motion; When the motion sensor is a six-axis motion sensor, the process of determining whether the wearable device is in motion according to a detection signal of the motion sensor includes: Acquire the linear acceleration and angular acceleration of the wearable device detected by the six-axis motion sensor; Determining whether the linear acceleration is greater than a preset first acceleration threshold or whether the angular acceleration is greater than a preset second acceleration threshold; If yes, it is determined that the wearable device is in motion; If not, it is determined that the wearable device is not in motion; The impedance sensor includes two electrodes disposed on the bottom shell of the wearable device; The process of determining whether the wearable device is in continuous contact with the human body within a preset first time according to the detection signal of the human body detector includes: Acquiring the impedance between the two electrodes detected by the impedance sensor; Determine whether the impedance is reduced to the Ω level and stabilized at the Ω level within a preset first time; If so, determining that the wearable device is in continuous contact with the human body within a preset first time; If not, determining that the wearable device does not maintain continuous contact with the human body within the preset first time; After determining that the wearable device is in a wearing state, the wearing detection method further includes: If the impedance is at the Ω level, it is determined that the wearable device is still in the wearing state; After determining that the wearable device is in a wearing state, the wearing detection method further includes: If the impedance increases to the MΩ level and stabilizes at the MΩ level within a preset second time, judging whether the wearable device is in motion according to the detection signal of the motion sensor; If not, it is determined that the wearable device is restored to a not-worn state.

2. The wearing detection method according to claim 1, characterized in that: The wearing detection method further includes: When it is determined that the wearable device is in motion, controlling the wearable device to switch from a standby mode to a normal working mode; When it is determined that the wearable device is in a wearing state, controlling the wearable device to continue to maintain a normal working mode; When it is determined that the wearable device is not in the wearing state, the wearable device is controlled to return to the standby mode.

3. The wearing detection method according to claim 1, characterized in that: The wearing detection method further includes: When it is determined that the wearable device is restored to the unworn state, the wearable device is controlled to switch from the normal working mode to the standby mode.

4. A wearable device, characterized in that: Includes motion sensors and human detectors, and also includes: A controller, used to implement the steps of the wearing detection method as described in any one of claims 1 to 3 when executing a computer program stored in the controller.

5. The wearable device according to claim 4, characterized in that: The wearable device is a wristband device.

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