WO2019100737A1 - 心率检测方法及可穿戴设备 - Google Patents

心率检测方法及可穿戴设备 Download PDF

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Publication number
WO2019100737A1
WO2019100737A1 PCT/CN2018/096188 CN2018096188W WO2019100737A1 WO 2019100737 A1 WO2019100737 A1 WO 2019100737A1 CN 2018096188 W CN2018096188 W CN 2018096188W WO 2019100737 A1 WO2019100737 A1 WO 2019100737A1
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Prior art keywords
user
heart rate
sensing module
distance
optical heart
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PCT/CN2018/096188
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English (en)
French (fr)
Inventor
唐先炜
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歌尔股份有限公司
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Priority to US16/764,354 priority Critical patent/US11589818B2/en
Publication of WO2019100737A1 publication Critical patent/WO2019100737A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02438—Detecting, measuring or recording pulse rate or heart rate with portable devices, e.g. worn by the patient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/681—Wristwatch-type devices
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
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    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G—PHYSICS
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    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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    • A61B2560/02—Operational features
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    • A61B2562/0247—Pressure sensors
    • A—HUMAN NECESSITIES
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    • A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B2562/066—Arrangements of multiple sensors of different types in a matrix array
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    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
    • A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
    • A61B5/721—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/63—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation

Definitions

  • the present invention belongs to the field of electronic technology, and in particular to a heart rate detecting method and a wearable device.
  • wearable devices achieve more and more functions by detecting the heart rate of users, such as motion monitoring, health monitoring, sleep monitoring, and the like.
  • the wearable device usually uses PPG (PhotoPlethysmoGraphy) pulse wave method for heart rate detection, wherein PPG is a method for heart rate measurement based on the principle that photoelectrically detecting blood volume changes with pulse beat.
  • PPG PhotoPlethysmoGraphy
  • the wearable device emits an optical signal to the wearing part of the user through an optical heart rate sensing module including an LED lamp and a photodetector, and detects the reflection intensity of the optical signal, and obtains the frequency of the reflected intensity change obtained by the detection.
  • PPG PhotoPlethysmoGraphy pulse wave method for heart rate detection
  • PPG is a method for heart rate measurement based on the principle that photoelectrically detecting blood volume changes with pulse beat.
  • the wearable device emits an optical signal to the wearing part of the user through an optical heart rate sensing module including an LED lamp and a photodetector, and detects the reflection intensity of the optical signal, and obtains the frequency of the reflected intensity change obtained by the detection
  • the above-mentioned heart rate detecting method causes the relative position of the wearing part of the device and the user to change due to other factors such as looseness or movement when the user wears the wearable device, thereby causing the optical signal transmitted by the optical heart rate sensing module to propagate.
  • the path changes, so that the reflection intensity of the optical signal detected by the optical heart rate sensing module becomes smaller, thereby affecting the heart rate detection result and reducing the detection accuracy of the heart rate.
  • the present invention provides a heart rate detecting method and a wearable device for solving the problem that the heart rate detecting accuracy is lowered due to the relative position change of the smart wearable device and the wearing part, thereby further improving the heart rate detecting accuracy of the device. .
  • an embodiment of the present invention provides a heart rate detecting method, which is applied to a wearable device, including a housing, a processor installed in the housing, and a processor connected to the housing and mounted on the housing.
  • the method includes:
  • the positional relationship between the optical heart rate sensing module and the wearing part of the user is detected by the distance sensing module, and the relative position data of the optical heart rate sensing module relative to the wearing part of the user is obtained;
  • the signal transmission power of the optical heart rate sensing module is adjusted, and the user's heart rate is detected by the optical heart rate sensing module.
  • the embodiment of the invention further provides a wearable device, comprising: a housing, a processor mounted in the housing, and an optical heart rate sensing module connected to the processor and mounted on a side of the housing facing the wearing part of the user; Sensing module
  • the optical heart rate sensing module is configured to emit an optical signal and detect a reflected intensity of the optical signal; and send the reflected intensity to the processor;
  • the distance sensing module is configured to send the positional relationship between the detected optical heart rate sensing module and the wearing part of the user to the processor;
  • the processor is configured to detect a positional relationship between the optical heart rate sensing module and the wearing part of the user according to the distance sensing module, and obtain relative position data of the optical heart rate sensing module relative to the wearing part of the user; and adjust the optical according to the relative position data.
  • the signal transmission power of the heart rate sensing module detects the user's heart rate through the optical heart rate sensing module.
  • the present invention can obtain the following technical effects:
  • Embodiments of the present invention provide a heart rate detecting method and a wearable device including a housing, a processor mounted in the housing, and a processor connected to the processor and mounted on the housing facing the user.
  • the change of the optical path of the optical heart rate sensing module to emit the optical signal can be known, thereby dynamically adjusting the signal transmission power of the optical heart rate sensing module according to the relative position data to compensate the reflected light intensity due to the optical path change. Attenuation.
  • the problem that the heart rate detection result is inaccurate due to the relative position change of the optical heart rate sensing module is avoided, and the heart rate detection accuracy is greatly improved.
  • FIG. 1 is a schematic block diagram of an embodiment of a wearable device according to an embodiment of the present invention
  • FIG. 2 is a schematic block diagram of another embodiment of a wearable device according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a back surface of a wearable device according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing a side state of a wearable device relative to a wearing position according to an embodiment of the present invention
  • FIG. 5 is a flowchart of an embodiment of a heart rate detecting method according to an embodiment of the present invention.
  • FIG. 6 is a flow chart of another embodiment of a heart rate detecting method according to an embodiment of the present invention.
  • the present invention provides a heart rate detecting method and a wearable device including a housing, a processor mounted in the housing, and a processor coupled to the processor and mounted on a side of the housing facing the user wearing part Optical heart rate sensing module and distance sensing module.
  • the method detects the positional relationship between the optical heart rate sensing module and the wearing part of the user through the distance sensing module, and calculates the relative position data of the optical heart rate sensing module relative to the wearing part of the user according to the positional relationship obtained by the detection. .
  • the change of the optical path of the optical heart rate sensing module to emit the optical signal can be known, thereby dynamically adjusting the signal transmission power of the optical heart rate sensing module according to the relative position data to compensate the reflected light intensity due to the optical path change. Attenuation.
  • the problem that the heart rate detection result is inaccurate due to the relative position change of the optical heart rate sensing module is avoided, and the heart rate detection accuracy is greatly improved.
  • the wearable device may include a housing 101, a processor 102 installed in the housing 101, and a processor 102 connected thereto.
  • the optical heart rate sensing module 103 and the distance sensing module 104 are mounted on the housing 101 facing the user wearing part.
  • the optical heart rate sensing module 103 is configured to emit an optical signal and detect the reflected intensity of the optical signal; and send the reflected intensity to the processor 102.
  • the heart rate is detected based on the PPG (PhotoPlethysmoGraphy) pulse wave method. Therefore, the user's heart rate is detected by setting the optical heart rate sensing module 103.
  • this heart rate detection method is highly susceptible to the use environment, especially the wearing method, such as the degree of tightness of the wearing, and the degree of fit with the wearing part of the user, directly affecting the propagation and measurement of the optical signal.
  • the positional change between the optical heart rate sensing module and the wearing part of the user has a significant influence on the measurement result due to the movement.
  • the optical heart rate sensing module 103 can include multiple sets of LED (Light Emitting Diode) lamps for emitting optical signals, and one or more photodetectors for detecting optical signals reflected by the user wearing parts. brightness.
  • LED Light Emitting Diode
  • the optical heart rate sensing module 103 is attached to the user wearing part, the plurality of light signals emitted by the plurality of sets of LED lights are perpendicularly incident on the wearing part of the user, and are reflected by the user wearing part to generate a reflected light signal, and one or more photoelectric signals are generated.
  • the detector detects the light intensity of the plurality of reflected light signals. Since the skin's skin, bones, muscles, fat, etc.
  • the optical heart rate sensing module 103 detects the change in the reflected intensity of the optical signal, and can detect the user's heart rate.
  • the distance sensing module 104 is configured to transmit the positional relationship between the optical heart rate sensing module 103 obtained by the detection and the wearing portion of the user to the processor 102.
  • the processor 102 is configured to detect the positional relationship between the optical heart rate sensing module 103 and the wearing part of the user according to the distance sensing module 104, and obtain relative position data of the optical heart rate sensing module 103 relative to the wearing part of the user; The relative position data adjusts the signal transmission power of the optical heart rate sensing module 103, and detects the heart rate of the user through the optical heart rate sensing module 103.
  • the optical heart rate sensing module 103 detects the change law of the reflection intensity of the optical signal, the user's heart rate is obtained. Therefore, when the positional relationship between the optical heart rate sensing module 103 and the wearing portion of the user changes, the optical path of the optical signal emitted by the optical heart rate sensing module 103 is not perpendicular to the wearing portion of the user but generates an incident angle. As a result, the intensity of the reflection of the optical signal detected by the photodetector becomes small, thereby affecting the accuracy of the heart rate detection.
  • the positional relationship between the optical heart rate sensing module 103 and the user wearing part is detected by the distance sensing module 104, and the processor 102 calculates and obtains the optical heart rate sensing module 103 and the user wearing part according to the positional relationship.
  • the relative position data dynamically adjusts the signal intensity of the optical signal emitted by the optical heart rate sensing module 103 according to the position data to compensate for the attenuation of the reflection intensity of the optical signal due to the optical path change.
  • the distance sensing module 104 can detect the positional relationship between the optical heart rate sensing module 103 and the wearing part of the user in real time, or in a preset interval, so that the processor 102 can calculate and obtain the position relationship based on the position relationship in time. Relative position data of the optical heart rate sensing module 103 relative to the user.
  • the positional relationship between the optical heart rate sensing module and the wearing part of the user is detected in real time by the distance sensing module, and the processor calculates the relative position data according to the positional relationship to dynamically adjust the optical heart rate transmission.
  • the light intensity of the sensor module emits signal light.
  • the distance sensing module 104 may include a plurality of capacitive sensors.
  • the optical heart rate sensing module 103 is mounted at a central position of the housing 101 facing the user wearing part.
  • the plurality of capacitive sensors are centered around the optical heart rate sensor module 103 and are equally spaced around the periphery of the optical heart rate sensor module.
  • the processor 102 is further configured to calculate, for each capacitive sensor, a user distance between a position point corresponding to the capacitance sensor and a wearing part of the user on the housing 101 based on the capacitance parameter detected by the capacitance sensor; The distance is calculated to obtain relative position data of the optical heart rate sensing module 103 and the user wearing part.
  • a plurality of capacitive sensors can be used to detect capacitance parameters of different positions of the housing 101 relative to the wearing portion of the housing. For each capacitive sensor, the corresponding capacitance on the housing 101 can be calculated based on the capacitance parameter obtained by the capacitive sensor detection. The user distance between the sensor's location point and the user's wearing location.
  • H represents the user distance of any capacitive sensor to the wearer's location
  • C represents the capacitance parameter obtained by any capacitive sensor detection
  • ⁇ represents the air dielectric constant
  • S represents the surface area of any capacitive sensor.
  • each of the capacitive sensors is disposed on the surface of the housing 101, and the plurality of capacitive sensors are centered on the optical heart rate sensor module 103, they are equally spaced around the periphery of the optical heart rate sensor module. Therefore, based on the user distance of each of the capacitive sensors to the user wearing part, the calculated positional relationship of the housing 101 relative to the user wearing part can be approximated by the positional relationship of the optical heart rate sensing module 103 relative to the user wearing part.
  • a plurality of capacitive sensors are disposed on one side of the housing facing the wearing part of the user, and the capacitance parameter obtained by the capacitive sensor is calculated to obtain a user distance from the wearing part of the user to each capacitive sensor, thereby being able to obtain multiple directions.
  • the positional relationship of the housing relative to the wearing portion of the user is known, and the relative position data of the optical heart rate sensing module located at the center of the housing relative to the wearing portion of the user is further calculated.
  • the relative position data of the optical heart rate sensing module 103 relative to the user wearing part may include a relative offset distance and a relative offset angle.
  • calculating the relative position data of the optical heart rate sensing module 103 and the wearing part of the user based on the plurality of user distances may include:
  • the average user distance of the plurality of capacitive sensors to the wearer's site is calculated based on the plurality of user distances.
  • the average user distance is determined as the relative offset distance of the optical heart rate sensing module 103 from the wearing portion.
  • a third capacitive sensor and a fourth capacitive sensor that have the largest user distance difference and are symmetric with respect to the center of the optical heart rate sensing module 103 are determined.
  • the average user distance for calculating the plurality of capacitive sensors to the wearing part of the user can be calculated according to the following formula:
  • each of the plurality of capacitive sensors is symmetric about the center of the optical heart rate sensing module.
  • the wearable device is not attached to the user wearing portion due to the deviation, and the housing 101 may have an angle with the user wearing portion.
  • the distance between each of the two capacitive sensors symmetrical about the center of the optical heart rate sensing module 103 is measured in advance and stored in the processor 102 in advance.
  • the separation distance (straight line distance) between the two capacitive sensors can be obtained, and then the optical heart rate sensing module can be calculated according to the triangle angle calculation formula. The relative offset angle of the user's wearing position.
  • the third user distance obtained by the third capacitive sensor detection, the fourth user distance obtained by the fourth capacitive sensor detection, and the third separation distance between the third capacitive sensor and the fourth capacitive sensor may be relatively biased as follows.
  • the shift angle calculation formula calculates the relative offset angle of the optical heart rate sensing module 103 and the wearing part of the user;
  • Hd represents the third user distance
  • Hg represents the fourth user distance
  • Ddg represents the third separation distance
  • the calculation of the relative offset data is applicable, but also when the wearable device housing is completely detached (there is no fitting portion).
  • the calculation of the relative offset data when the user wears is more suitable for the scene in which the optical signal power of the optical heart rate sensing module wearing the wearable device is dynamically adjusted when the user has a large motion range.
  • the intensity value of the optical signal emitted by the optical heart rate sensing module is correspondingly enhanced to compensate the reflection intensity of the signal light measured by the optical heart rate sensing module.
  • adjusting the signal transmission power of the optical heart rate sensing module 103 and detecting the heart rate of the user through the optical heart rate sensing module 103 may include:
  • the attenuation coefficient corresponding to the relative offset distance is determined according to the preset attenuation parameter adjustment rule.
  • the preset attenuation parameter adjustment rule is pre-stored in the wearable device, and the preset attenuation parameter adjustment rule includes a correspondence between the relative offset distance and the attenuation coefficient.
  • the attenuation multiple of the reflection intensity is calculated based on the attenuation coefficient and the relative offset angle.
  • the signal transmission power of the optical heart rate sensing module 103 is adjusted according to the attenuation factor, and the heart rate of the user is detected by the optical heart rate sensing module 103.
  • the optical heart rate sensing module 103 detects the reflected intensity of the obtained signal light as:
  • calculating the attenuation multiple of the reflection intensity based on the attenuation coefficient and the relative offset angle may include:
  • the attenuation multiple of the reflection intensity is calculated according to the following attenuation multiple calculation formula
  • M represents the attenuation factor
  • h represents the relative offset distance
  • k(h) represents the attenuation coefficient corresponding to the relative offset distance h.
  • the signal transmission power of the optical heart rate sensing module can be adjusted to 1/M times according to the attenuation multiple of the calculated reflection intensity. In order to maintain the stability of the signal received by the optical heart rate sensing module 103.
  • the attenuation coefficient model of the optical signal and the relative offset angle and the relative offset distance are established, and the relative offset angle and the relative offset distance obtained by the calculation can be used to obtain the corresponding optical signal.
  • Attenuation coefficient According to the attenuation coefficient, the attenuation multiple of the reflection intensity can be calculated, so that the processor can dynamically adjust the transmission power of the optical heart rate sensing module according to the calculated attenuation multiple, and ensure the stability of the optical heart rate sensing module receiving the optical signal.
  • the reflection intensity obtained by the detection is not interfered by factors such as external and optical path changes, and the accuracy of heart rate detection is greatly improved.
  • FIG. 2 is a schematic block diagram of another embodiment of a wearable device in accordance with an embodiment of the present invention, the wearable device including the housing 101 in the embodiment of FIG. 1, the processor 102 installed in the housing 101, and The processor 102 is connected to the optical heart rate sensing module 103 and the distance sensing module 104 on the side of the housing 101 facing the user wearing part, and further includes a processor 102 and is disposed in the housing 101.
  • the pressure sensing module 105 faces the user wearing part.
  • the pressure sensing module 105 can include a plurality of pressure sensors centered on the heart rate sensor module 103, spaced apart from the plurality of capacitive sensors, and equally spaced around the periphery of the optical heart rate sensor module 103.
  • the pressure sensing module 105 is configured to detect and transmit pressure parameters between the housing 101 and the user wearing portion to the processor 102. Specifically, for each pressure sensor in the pressure sensing module 105, the pressure sensor is used to detect a pressure value between the position point of the housing 101 corresponding to the pressure sensor and the wearing part of the user, and generate a pressure sensor corresponding to the pressure sensor. Pressure parameters.
  • the calculating, by the processor 102, the relative position data of the optical heart rate sensing module 103 and the user wearing part based on the plurality of user distances may include:
  • the pressure parameter at different points on the housing is detected by providing a plurality of pressure sensors, so that the processor can quickly obtain the detection based on the detection.
  • the pressure parameter determines the two capacitive sensors with the largest user distance difference.
  • a plurality of pressure sensors are disposed on the periphery of the optical heart rate sensing module 103 centering on the optical heart rate sensing module 103, and Capacitive sensors are equally spaced.
  • the two pressure values obtained by the plurality of pressure sensors are used to obtain the maximum and the second largest pressure values, and the first capacitive sensor closest to the user's wearing position of the user is directly determined, and the first The second capacitive sensor symmetrically centered on the capacitive sensor is the capacitive sensor that is the farthest away from the user.
  • the first capacitive sensor and the second capacitive sensor with the largest user distance difference can be directly determined, and the user distance difference of each of the two central symmetric capacitive sensors is not required to be calculated one by one, which can greatly improve the processing efficiency of the processor.
  • the relative position data of the optical heart rate sensing module 103 relative to the user wearing portion may include a relative offset distance and a relative offset angle. Therefore, calculating the relative position data of the optical heart rate sensing module 103 relative to the user wearing part according to the user distance obtained by detecting the first capacitive sensor and the second capacitive sensor may include:
  • the second separation distance calculation of the optical heart rate sensing module 103 obtains a relative offset distance between the optical heart rate sensing module 103 and the wearing portion of the user.
  • the relative offset angle of the optical heart rate sensing module and the wearing part of the user is calculated based on the first user distance, the second user distance, and the first separation distance.
  • the separation distance between each pressure sensor and the optical heart rate sensing module 103 is measured and stored in advance in the wearable device engineering production stage. Since each pressure sensor is symmetrical about the centerline, the separation distance between each pressure sensor and the optical heart rate sensing module 103 refers to the vertical distance from each pressure sensor to the centerline.
  • the relative offset distance between the optical heart rate sensing module 101 and the wearing portion of the user may include:
  • the relative offset distance between the optical heart rate sensing module 103 and the user wearing part is calculated according to the following relative offset distance calculation formula:
  • h denotes a relative offset distance
  • Ha denotes a first user distance
  • He denotes a second user distance
  • Dae denotes a first separation distance
  • Dcd denotes a second separation distance
  • the first user distance, the second user distance, and the relative offset distance are parallel lines perpendicular to the wearing portion of the user, and the first spacing distance is parallel to the second spacing distance, so according to the parallel
  • the ratio of the first separation distance to the second separation distance is equal to the ratio of the user distance difference between the first capacitive sensor and the second capacitive sensing and the relative offset distance, thereby calculating the relative offset distance.
  • Calculating, according to the first user distance, the second user distance, and the first separation distance, the relative offset angle of the optical heart rate sensing module 103 and the wearing portion of the user may include:
  • the calculation method of the relative offset angle is the same as the calculation method in the embodiment of FIG. 1, and details are not described herein again.
  • the first capacitive sensor and the second capacitive sensor having the largest user distance difference are determined by setting the pressure parameters detected by the plurality of pressure sensors, and the relative offset distance obtained by the parallel line segmentation proportional principle is obtained. Compared with the value of the relative offset distance obtained by calculating the average user distance, the calculation error caused by the averaging is avoided, and the calculation accuracy of the relative offset distance and the relative offset angle is improved, so that the calculated reflection intensity is obtained.
  • the attenuation factor is more accurate, which further improves the accuracy of the heart rate measurement of the optical heart rate sensing module.
  • the optical heart rate sensing module 103 can include a photodetector and two sets of LED lights, and two sets of LED lights are respectively connected to the processor 102 to implement the power of the optical heart rate sensing module signal 103. Dynamic adjustment.
  • the photodetector is located at the center of the optical heart rate sensing module 103, and two sets of LED lights are symmetrically disposed on the left and right sides of the photodetector, so that the photodetector can detect the reflection intensity of the optical signal.
  • the wearable device may further include a fixing strap connected to the housing 101; the fixing strap is used to fix the wearable device to a user wearing portion.
  • the two ends of the wearable device casing 101 are used for connecting the fixing belts.
  • the positional displacement of the casing is usually that the casing on one side of the fixing belt is lifted, and the other side is attached to the wearing portion of the user.
  • the distance sensing module 104 may include four capacitive sensors; the four capacitive sensors are centered around the optical heart rate sensor module 103, and are equally spaced around the optical heart rate sensor. The periphery of the module 103; wherein two capacitive sensors are respectively disposed at two ends of the housing 101 connecting the fixing straps.
  • the pressure sensing module 105 can also include four pressure sensors; the four pressure sensors are equally spaced from the four capacitive sensors, and are equally spaced around the periphery of the optical heart rate sensor module 103.
  • the wearable device can be a smart bracelet or a smart watch.
  • Figure 3 shows the back view of any smart watch.
  • the optical heart rate sensing module 103 is located at the center of the housing 101.
  • the optical heart rate sensing module 103 includes a photodetector 31 and two sets of LED lamps 32 and 33.
  • the distance sensing module 104 and the pressure sensing module 105 are centered on the optical heart rate sensing module 103, and are spaced apart from each other and equally spaced around the periphery of the optical heart rate sensor module 103.
  • the distance sensing module 104 includes four capacitive sensors (the octagonal shape indicates a capacitive sensor as shown in FIG. 3), and the pressure sensing module includes four pressure sensors (the diamond shape indicates a pressure sensor as shown in FIG. 3).
  • the processor 102 is located in the housing 101 and is connected to the distance sensing module 104 and the pressure sensing module 105 by an optical heart rate sensing module 103, which is not shown in FIG.
  • the smart watch performs heart rate detection by attaching the back of the watch case to the user wearing part through the optical heart rate sensing module 103 through the strap.
  • FIG. 4 a schematic view of the side state when the relative position of the smart watch case 101 with respect to the wearing part changes.
  • the pressure sensor 35 is now engaged with the user wearing portion.
  • the pressure sensor 35 and the pressure sensor 36 detect that the obtained pressure parameter value is the largest, so that the capacitance sensor 34 located between the pressure sensor 35 and the pressure sensor 36 can be determined as the first capacitive sensor.
  • the capacitive sensor 37 which is symmetric with respect to the center of the optical heart rate sensing module 103, is a second capacitive sensor. Dae is the distance between the capacitive sensor 34 and the capacitive sensor 37, that is, the first separation distance (straight line distance); Dcd is the distance between the optical heart rate sensing module 103 and the pressure sensor 35 or the pressure sensor 36 (wherein the pressure)
  • the sensor 35 or the pressure sensor 36 is symmetrical about a centerline, which is the vertical distance of the pressure sensor 35 or the pressure sensor 36 from the centerline, that is, the second separation distance; Ha is the first user distance, and He is the second user distance;
  • the relative offset distance h can be calculated by the above-mentioned relative offset distance, and the relative offset angle ⁇ can be calculated according to the above-described relative offset angle calculation formula.
  • the query obtains the corresponding attenuation coefficient, and calculates the attenuation multiple of the reflected intensity of the optical signal, so that the processor adjusts the optical heart rate transmission in real time according to the attenuation multiple.
  • the signal transmission power of the sensing module greatly improves the accuracy of the heart rate detection of the device.
  • FIG. 5 is a flowchart of an embodiment of a heart rate detecting method according to an embodiment of the present invention, applied to a wearable device, including a housing, a processor installed in the housing, and connected to the processor and mounted on the processor The housing faces the optical heart rate sensing module and the distance sensing module on one side of the user wearing part.
  • the method can include:
  • S501 Detecting a positional relationship between the optical heart rate sensing module and the wearing part of the user by using the distance sensing module, and obtaining relative position data of the optical heart rate sensing module relative to the wearing part of the user.
  • S502 Adjust the signal transmission power of the optical heart rate sensing module according to the relative position data.
  • S503 Detecting a user's heart rate through an optical heart rate sensing module.
  • the positional relationship between the optical heart rate sensing module and the wearing part of the user is detected in real time by the distance sensing module, and the processor calculates the relative position data according to the positional relationship to dynamically adjust the optical heart rate transmission.
  • the light intensity of the sensor module emits signal light.
  • the distance sensing module may include a plurality of capacitive sensors.
  • the optical heart rate sensing module is mounted at a central position of the housing facing the user wearing part, and the plurality of capacitive sensors are centered around the optical heart rate sensor module and are equally spaced around the periphery of the optical heart rate sensor module.
  • the positional relationship between the optical heart rate sensing module and the wearing part of the user is detected by the distance sensing module, and the relative position data of the optical heart rate sensing module relative to the wearing part of the user is obtained.
  • the user distance between the position point of the corresponding capacitive sensor and the wearing part of the user is calculated; and the optical heart rate sensing mode is calculated based on the distances of multiple users. Relative position data of the group and the wearing part of the user.
  • the processor calculates the user distance from each capacitive sensor to the wearing part of the user, which may include: calculating, for each capacitance parameter, the user distance of each capacitive sensor to the wearing part of the user according to the following user distance calculation formula. .
  • H represents the user distance of any capacitive sensor to the wearer's location
  • C represents the capacitance parameter obtained by any capacitive sensor detection
  • ⁇ represents the air dielectric constant
  • S represents the surface area of any capacitive sensor.
  • a plurality of capacitive sensors are disposed on one side of the housing facing the wearing part of the user, and the capacitance parameter obtained by the capacitive sensor is calculated to obtain a user distance from the wearing part of the user to each capacitive sensor, thereby being able to obtain multiple directions.
  • the positional relationship of the housing relative to the wearing portion of the user is known, and the relative position data of the optical heart rate sensing module located at the center of the housing relative to the wearing portion of the user is further calculated.
  • the relative position data of the optical heart rate sensing module relative to the user wearing portion may include a relative offset distance and a relative offset angle.
  • calculating the relative position data of the optical heart rate sensing module and the wearing part of the user based on the multiple user distances may include:
  • the average user distance of the plurality of capacitive sensors to the wearer's site is calculated based on the plurality of user distances.
  • the average user distance is determined as the relative offset distance between the optical heart rate sensing module and the wearing portion.
  • a third capacitive sensor and a fourth capacitive sensor that have the largest user distance difference and are symmetric with respect to the center of the optical heart rate sensing module are determined.
  • the average user distance for calculating the plurality of capacitive sensors to the wearing part of the user can be calculated according to the following formula:
  • the third user distance obtained by the third capacitive sensor detection, the fourth user distance obtained by the fourth capacitive sensor detection, and the third separation distance between the third capacitive sensor and the fourth capacitive sensor may be according to the following relative offset angle
  • the calculation formula calculates the relative offset angle of the optical heart rate sensing module and the wearing part of the user
  • Hd represents the third user distance
  • Hg represents the fourth user distance
  • Ddg represents the third separation distance
  • the calculation of the relative offset data is applicable, but also when the wearable device housing is completely detached (there is no fitting portion).
  • the calculation of the relative offset data when the user wears is more suitable for the scene in which the optical signal power of the optical heart rate sensing module wearing the wearable device is dynamically adjusted when the user has a large motion range.
  • adjusting the signal transmission power of the optical heart rate sensing module and detecting the heart rate of the user through the optical heart rate sensing module may include: determining and relative offset according to the preset attenuation parameter adjustment rule. The corresponding attenuation factor for the distance.
  • the preset attenuation parameter adjustment rule is pre-stored in the wearable device, and the preset attenuation parameter adjustment rule includes a correspondence between the relative offset distance and the attenuation coefficient.
  • the attenuation multiple of the reflection intensity is calculated based on the attenuation coefficient and the relative offset angle.
  • the signal transmission power of the optical heart rate sensing module is adjusted according to the attenuation factor, and the user's heart rate is detected by the optical heart rate sensing module.
  • calculating the attenuation multiple of the reflection intensity based on the attenuation coefficient and the relative offset angle may include:
  • the attenuation multiple of the reflection intensity is calculated according to the following attenuation multiple calculation formula
  • M represents the attenuation factor
  • h represents the relative offset distance
  • k(h) represents the attenuation coefficient corresponding to the relative offset distance h.
  • the signal transmission power of the optical heart rate sensing module can be adjusted to 1/M times according to the attenuation multiple of the calculated reflection intensity. In order to maintain the stability of the signal received by the optical heart rate sensing module.
  • the attenuation coefficient model of the optical signal and the relative offset angle and the relative offset distance are established, and the relative offset angle and the relative offset distance obtained by the calculation can be used to obtain the corresponding optical signal.
  • Attenuation coefficient According to the attenuation coefficient, the attenuation multiple of the reflection intensity can be calculated, so that the processor can dynamically adjust the transmission power of the optical heart rate sensing module according to the calculated attenuation multiple, and ensure the stability of the optical heart rate sensing module receiving the optical signal.
  • the reflection intensity obtained by the detection is not interfered by factors such as external and optical path changes, and the accuracy of heart rate detection is greatly improved.
  • FIG. 6 is a flowchart of another embodiment of a heart rate detecting method according to an embodiment of the present invention, which is applied to a wearable device.
  • the wearable device includes, in addition to the housing in the embodiment of FIG. 5, a processor mounted in the housing, and an optical heart rate sensing module and a distance sensing module connected to the processor and mounted on a side of the housing facing the user wearing part.
  • the pressure sensing module is connected to the processor and disposed on a side of the housing facing the wearing part of the user.
  • the pressure sensing module includes a plurality of pressure sensors; the plurality of pressure sensors are centered on the heart rate sensor module, and are spaced apart from the plurality of capacitive sensors, and are equally spaced around the periphery of the optical heart rate sensor module.
  • the method can include:
  • S601 Calculate the capacitance parameter obtained by detecting the plurality of capacitive sensors, and calculate, by using the plurality of capacitive sensors, the user distance between the different position points on the housing and the wearing part of the user.
  • S602 The pressure parameter between the different position points on the housing and the wearing part of the user is detected by the pressure sensing module.
  • S603 Determine, according to each pressure parameter, a first pressure sensor and a second pressure sensor respectively corresponding to two pressure parameters of a maximum value and a second largest value.
  • S604 Determine that the capacitive sensor located between the first pressure sensor and the second pressure sensor is a first capacitive sensor, and a second capacitive sensor that is symmetric with respect to the center of the first capacitive sensor with respect to the optical heart rate sensing module.
  • S605 Calculate relative position data of the optical heart rate sensing module relative to the wearing part of the user according to the user distance detected by the first capacitive sensor and the second capacitive sensor.
  • S606 Adjust the signal transmission power of the optical heart rate sensing module according to the relative position data.
  • S607 The user's heart rate is detected by the optical heart rate sensing module.
  • the calculating the relative position data of the optical heart rate sensing module relative to the user wearing part according to the user distance obtained by detecting the first capacitive sensor and the second capacitive sensor may include:
  • the second separation distance calculation of the optical heart rate sensing module obtains a relative offset distance between the optical heart rate sensing module and the wearing portion of the user.
  • the relative offset angle of the optical heart rate sensing module and the wearing part of the user is calculated based on the first user distance, the second user distance, and the first separation distance.
  • the first capacitive sensor the first user distance is detected, the second capacitive sensor detects the second user distance, the first separation distance between the first capacitive sensor and the second capacitive sensor, and the first pressure sensor or
  • the second separation distance between the second pressure sensor and the optical heart rate sensing module is calculated to obtain a relative offset distance between the optical heart rate sensing module and the wearing portion of the user, which may include: based on the first user distance, the second user distance, and the first interval
  • the distance and the second separation distance are calculated according to the following relative offset distance calculation formula to obtain the relative offset distance between the optical heart rate sensing module and the wearing part of the user.
  • h denotes a relative offset distance
  • Ha denotes a first user distance
  • He denotes a second user distance
  • Dae denotes a first separation distance
  • Dcd denotes a second separation distance
  • Calculating, according to the first user distance, the second user distance, and the first separation distance, the relative offset angle of the optical heart rate sensing module and the user wearing part may include: based on the first user distance, the second user distance, and the first interval The distance between the optical heart rate sensing module and the wearing part of the user is calculated according to the following relative offset angle calculation formula;
  • the first capacitive sensor and the second capacitive sensor having the largest user distance difference are determined by setting the pressure parameters detected by the plurality of pressure sensors, and the relative offset distance obtained by the parallel line segmentation proportional principle is passed. Calculating the relative offset distance obtained by the average user distance is more accurate, avoiding the calculation error caused by the averaging, improving the calculation accuracy of the relative offset distance and the relative offset angle, and making the calculated attenuation intensity of the reflection intensity more Accurate, thus further precision of heart rate measurement in optical heart rate sensing modules.
  • a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
  • processors CPUs
  • input/output interfaces network interfaces
  • memory volatile and non-volatile memory
  • the memory may include non-persistent memory, random access memory (RAM) and/or non-volatile memory in a computer readable medium such as read only memory (ROM) or flash memory.
  • RAM random access memory
  • ROM read only memory
  • Memory is an example of a computer readable medium.
  • Computer readable media includes both permanent and non-persistent, removable and non-removable media.
  • Information storage can be implemented by any method or technology.
  • the information can be computer readable instructions, data structures, modules of programs, or other data.
  • Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory. (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transportable media can be used to store information that can be accessed by a computing device.
  • computer readable media does not include non-transitory computer readable media, such as modulated data signals and carrier waves.
  • first device can be directly electrically coupled to the second device, or indirectly coupled to the second device through other devices or coupling means.
  • Device The description of the present invention is intended to be illustrative of the preferred embodiments of the invention. The scope of the invention is defined by the appended claims.

Abstract

一种心率检测方法及一种可穿戴设备，该可穿戴设备包括壳体（101）、安装于壳体内（101）的处理器（102），以及与处理器（102）连接并安装于壳体（101）面向用户佩戴部位一面上的光学心率传感模组（103）及距离传感模组（104）。该方法包括：通过距离传感模组（104）检测光学心率传感模组（103）与用户佩戴部位之间的位置关系，得到该光学心率传感模组（103）相对于用户佩戴部位的相对位置数据。根据该相对位置数据，调节光学心率传感模组（103）的信号发射功率，并通过光学心率传感模组检测用户的心率。该设备和方法能提高可穿戴设备的心率检测精度。

Description

心率检测方法及可穿戴设备 技术领域
本发明属于电子技术领域，具体地说，涉及一种心率检测方法及一种可穿戴设备。
背景技术
随着电子技术的快速发展，可穿戴设备通过检测用户的心率实现越来越多的功能，例如，运动监测、健康监测、睡眠监测等。
现有技术中，可穿戴设备通常采用PPG(PhotoPlethysmoGraphy，光电容积描记)脉搏波法进行心率检测，其中PPG是一种基于光电检测血液容积随脉搏搏动发生变化的原理进行心率测量的方法。可穿戴设备通过包含LED灯及光电探测器的光学心率传感模组向用户的佩戴部位发射光信号并检测光信号的反射强度，并经过对检测获得的反射强度变化频率处理后即可获得该用户的心率。
但上述心率检测方法，在用户佩戴可穿戴设备时，由于佩戴过松或运动等其他因素造成该设备与用户的佩戴部位的相对位置发生变化，造成光学心率传感模组发射的光信号的传播路径发生变化，使得光学心率传感模组检测的光信号的反射强度变小，从而影响心率检测结果，降低了心率的检测精度。
发明内容
有鉴于此，本发明提供了一种心率检测方法及一种可穿戴设备，用于解决由于智能可穿戴设备与佩戴部位相对位置变化造成心率检测精度降低的问题，进一步提高了设备的心率检测精度。
为了解决上述技术问题，本发明实施例提供了一种心率检测方法，应用于可穿戴设备，该可穿戴设备包括壳体、安装于壳体内的处理器，以及与处理器连接并安装于壳体面向用户佩戴部位一面上的光学心率传感模组及距离传感模组；
该方法包括：
通过距离传感模组检测光学心率传感模组与用户佩戴部位之间的位置关系，得到光学心率传感模组相对于用户佩戴部位的相对位置数据；
根据相对位置数据，调节光学心率传感模组的信号发射功率，并通过光学心率传感模组检测用户的心率。
本发明实施例还提供了一种可穿戴设备，包括壳体、安装于壳体内的处理器，以及与处理器连接并安装于壳体面向用户佩戴部位一面上的光学心率传感模组及距离传感模组；
光学心率传感模组用于发射光信号，并检测光信号的反射强度；将反射强度发送至处理器；
距离传感模组用于将检测获得的光学心率传感模组与用户佩戴部位之间的位置关系发送至处理器；
处理器用于根据距离传感模组检测光学心率传感模组与用户佩戴部位之间的位置关系，得到光学心率传感模组相对于用户佩戴部位的相对位置数据；根据相对位置数据，调节光学心率传感模组的信号发射功率，并通过光学心率传感模组检测用户的心率。
与现有技术相比，本发明可以获得包括以下技术效果：
本发明实施例提供了一种心率检测方法及一种可穿戴设备，该可穿戴设备包括壳体、安装于壳体内的处理器，以及与该处理器连接并安装于该壳体面向用户佩戴部位一面上的光学心率传感模组及距离传感模组。该方法通过距离传感模组检测光学心率传感模组与用户佩戴部位之间的位置关系，根据检测获得的位置关系计算获得到光学心率传感模组相对于用户佩戴部位的相对位置数据。通过该相对位置数据，可以获知光学心率传感模组发射光信号的光路的变化，从而根据相对位置数据，动态调节光学心率传感模组的信号发射功率以补偿由于光路变化导致的反射光强度的衰减。避免了光学心率传感模组由于相对佩戴部位的相对位置变化导致心率检测结果不准确的问题，大大提高了心率检测精度。
附图说明
图1是本发明实施例的一种可穿戴设备的一个实施例的原理框图；
图2是本发明实施例的一种可穿戴设备的另一个实施例的原理框图；
图3是本发明实施例的一种可穿戴设备的背面结构示意图；
图4是本发明实施例的一种可穿戴设备相对于佩戴部位的相对位置变化时的侧面状态示意图；
图5是本发明实施例的一种心率检测方法的一个实施例的流程图；
图6是本发明实施例的一种心率检测方法的另一个实施例的流程图。
具体实施方式
以下将配合附图及实施例来详细说明本发明的实施方式，藉此对本发明如何应用技术手段来解决技术问题并达成技术功效的实现过程能充分理解并据以实施。
为了解决智能可穿戴设备与佩戴部位相对位置变化造成心率检测精度降低的技术问题。本发明提供了一种心率检测方法及一种可穿戴设备，该可穿戴设备包括壳体、安装于壳体内的处理器，以及与该处理器连接并安装于该壳体面向用户佩戴部位一面上的光学心率传感模组及距离传感模组。该方法通过距离传感模组检测光学心率传感模组与用户佩戴部位之间的位置关系，并根据检测获得的位置关系计算获得到光学心率传感模组相对于用户佩戴部位的相对位置数据。通过该相对位置数据，可以获知光学心率传感模组发射光信号的光路的变化，从而根据相对位置数据，动态调节光学心率传感模组的信号发射功率以补偿由于光路变化导致的反射光强度的衰减。避免了光学心率传感模组由于相对佩戴部位的相对位置变化导致心率检测结果不准确的问题，大大提高了心率检测精度。
下面将结合附图对本发明技术方案进行详细描述。
图1是本发明实施例的一种可穿戴设备的一个实施例的原理框图，该可穿戴设备可以包括壳体101、安装于壳体101内的处理器102、以及与该处理器102连接并安装于该壳体101面向用户佩戴部位一面上的光学心率传感模组103及距离传感模组104。
光学心率传感模组103用于发射光信号，并检测光信号的反射强度；将反射强度发送至处理器102。
本发明实施例中，基于PPG(PhotoPlethysmoGraphy，光电容积描记)脉搏波法来检测心率，因此通过设置光学心率传感模组103实现对用户心率的检测。但这种心率检测方法极易受到使用环境，特别是佩戴方式的影响，例如佩戴的松紧程度、与用户佩戴部位的贴合程度，直接影响光信号的传播和测量。而在用户佩戴该心率检测设备进行运动时，由于运动导致光学心率传感模组与用户佩戴部位之间位置变化对测量结果的影响尤为显著。
其中，光学心率传感模组103可以包括多组LED(Light Emitting Diode，发光二极管)灯，用于发射光信号，以及一个或多个光电探测器，用于检测用户佩戴部位反射的光信号的光强度。当该光学心率传感模组103与用户佩戴部位贴合时，多组LED灯发射的多个光信号垂直入射用户佩戴部位，并经过用户佩戴部位反射生成反射光信号，由一个或多个光电探测器检测获得该多个反射光信号的光强度。由于人体的皮肤、骨骼、肌肉、脂肪等对光的反射值是一个固定值，而毛细血管和动脉静脉血管随着脉搏容积的变化对光信号的反射值是一直变化的，且其变化规律与心率一致，因此通过光学心率传感模组103对光信号的反射强度的变化进行检测，即可检测获得用户心率。
距离传感模组104用于将检测获得的光学心率传感模组103与用户佩戴部位之间的位置 关系发送至处理器102。
处理器102用于根据距离传感模组104检测该光学心率传感模组103与用户佩戴部位之间的位置关系，得到光学心率传感模组103相对于用户佩戴部位的相对位置数据；根据该相对位置数据，调节光学心率传感模组103的信号发射功率，并通过光学心率传感模组103检测用户的心率。
由于，光学心率传感模组103是通过检测光信号的反射强度的变化规律，得到用户心率的。因此，当该光学心率传感模组103与用户佩戴部位的位置关系发生变化时，光学心率传感模组103发射的光信号的光路就不是垂直入射到用户佩戴部位而是产生了入射夹角，导致光电探测器检测到光信号的反射强度就会变小，从而影响了心率检测的精度。因此通过距离传感模组104检测光学心率传感模组103与用户佩戴部位之间的位置关系，并由处理器102根据该位置关系计算获得光学心率传感模组103与用户佩戴部位之间的相对位置数据，根据该位置数据动态调节光学心率传感模组103发射光信号的信号强度，以补偿由于光路变化导致光信号的反射强度的衰减。
其中，距离传感模组104可以通过实时检测或在预设间隔时间内检测光学心率传感模组103与用户佩戴部位之间的位置关系，使得处理器102可及时基于该位置关系，计算获得光学心率传感模组103相对于用户佩戴的相对位置数据。
本发明实施例中，通过距离传感模组实时检测光学心率传感模组与用户佩戴部位之间的位置关系，并由处理器根据该位置关系计算获得相对位置数据以动态调节该光学心率传感模组发射信号光的光强度。从而保证了光学心率传感模组检测获得用户心率的准确性，大大提高了心率的检测精度。
为了更加准确地检测光学心率传感模组103与用户佩戴部位之间的位置关系，距离传感模组104可以包括多个电容传感器。且光学心率传感模组103安装在壳体101面向用户佩戴部位一面的中心位置，多个电容传感器以光学心率传感器模组103为中心，等间隔环绕在光学心率传感器模组外围。
处理器102还可以用于：针对每个电容传感器，基于该电容传感器检测获得的电容参数，计算壳体101上对应该电容传感器的位置点与用户佩戴部位之间的用户距离；基于多个用户距离，计算获得光学心率传感模组103与用户佩戴部位的相对位置数据。
多个电容传感器可以用于检测到该壳体101不同位置点相对于用户佩戴部位的电容参数，针对每个电容传感器，可基于该电容传感器检测获得的电容参数计算获得壳体101上对应该电容传感器的位置点与用户佩戴部位之间的用户距离。
需要说明的是，处理器102针对各个电容参数，计算获得各个电容传感器到用户佩戴部 位的用户距离可以包括：针对各个电容参数，按照如下用户距离计算公式计算获得各个电容传感器到用户佩戴部位的用户距离。
用户距离计算公式可以表示为：H＝ε*S/C；
其中，H表示任一个电容传感器到用户佩戴部位的用户距离，C表示任一个电容传感器检测获得的电容参数，ε表示空气介电常数，S表示任一个电容传感器的表面积。
由于各个电容传感器设置于壳体101表面，且多个电容传感器以光学心率传感器模组103为中心，等间隔环绕在光学心率传感器模组外围。因此基于上述各个电容传感器到用户佩戴部位的用户距离，计算获得的壳体101相对于用户佩戴部位的位置关系可近似于光学心率传感模组103相对于用户佩戴部位的位置关系。
本发明实施例中，通过在壳体面向用户佩戴部位的一面设置多个电容传感器，通过电容传感器检测获得的电容参数计算获得用户佩戴部位到每个电容传感器的用户距离，从而可以从多个方位获知壳体相对于用户佩戴部位的位置关系，进一步计算获得位于壳体中心位置的光学心率传感模组相对于用户佩戴部位的相对位置数据。
在用户运动过程中，为了能够准确地反映出可穿戴设备与用户佩戴部位的相对位置的变化，通常可以根据距离和倾角两个参数来体现相对位置的变化。因此，光学心率传感模组103相对于用户佩戴部位的相对位置数据可以包括相对偏移距离及相对偏移角度。可选地，基于多个用户距离，计算获得光学心率传感模组103与用户佩戴部位的相对位置数据可以包括：
基于多个用户距离，计算多个电容传感器到用户佩戴部位的平均用户距离。
确定平均用户距离为光学心率传感模组103与佩戴部位的相对偏移距离。
基于多个用户距离，确定用户距离差最大且关于光学心率传感模组103中心对称的第三电容传感器及第四电容传感器。
基于第三电容传感器检测获得的第三用户距离、第四电容传感器检测获得的第四用户距离及第三电容传感器与第四电容传感器之间的第三间隔距离(直线距离)，计算获得光学心率传感模组103与用户佩戴部位的相对偏移角度。
需要说明的是，基于多个用户距离，计算多个电容传感器到用户佩戴部位的平均用户距离可以按照以下公式计算获得：
Figure PCTCN2018096188-appb-000001
确定相对偏移距离为：h＝H ave。
由于多个电容传感器为以光学心率传感模组103为中心等间隔围绕在光学心率传感模组外围，因此多个电容传感器中每两个电容传感器关于光学心率传感模组中心对称，当在用户运动过程中该可穿戴设备由于发生偏移导致壳体101未与用户佩戴部位贴合，此时该壳体101 会与用户佩戴部位之间存在夹角。通过比较每两个关于光学心率传感模组103中心对称的用户距离差，可以确定用户距离差最大的两个电容传感器所在位置的连线，位于该壳体相对于用户佩戴部位偏移方向上。
实际在可穿戴设备工程生产阶段，预先测量得到每两个关于光学心率传感模组103中心对称的电容传感器之间的间隔距离，并预先存储至处理器102中。在确定出用户距离差值最大的两个电容传感器后，可获取该两个电容传感器之间的间隔距离(直线距离)，再根据三角形夹角计算公式即可计算获得光学心率传感模组与用户佩戴部位的相对偏移角度。
因此，基于第三电容传感器检测获得的第三用户距离、第四电容传感器检测获得的第四用户距离及第三电容传感器与第四电容传感器之间的第三间隔距离，可以按照下述相对偏移角度计算公式计算获得光学心率传感模组103与用户佩戴部位的相对偏移角度；
相对偏移角度计算公式为：α＝arcsin[(Hd-Hg)/Ddg]；
其中，Hd表示第三用户距离，Hg表示第四用户距离，Ddg表示第三间隔距离。
本发明实施例中，不仅适用于可穿戴设备壳体部分贴合于用户佩戴部位时，对相对偏移数据的计算，还可以适用于当该可穿戴设备壳体全部脱离(没有贴合部分)用户佩戴时的相对偏移数据的计算，因此更适合于用户运动幅度较大时，对佩戴可穿戴设备的光学心率传感模组发射光信号功率进行动态调整的场景。
在得到光学心率传感模组103与用户佩戴部位的相对位置数据后，需要根据光信号的反射强度与相对位置数据之间的对应关系得到该光信号的反射强度的衰减数据。从而根据反射强度的衰减数据，相应增强该光学心率传感模组发射光信号的强度值，以补偿光学心率传感模组测量信号光的反射强度。
需要说明的是，根据相对位置数据，调节光学心率传感模组103的信号发射功率，并通过光学心率传感模组103检测用户的心率可以包括：
根据预设衰减参数调整规则，确定与相对偏移距离对应的衰减系数。
其中，预设衰减参数调整规则预先存储于可穿戴设备中，预设衰减参数调整规则中包含相对偏移距离与衰减系数的对应关系。
基于衰减系数及相对偏移角度，计算反射强度的衰减倍数。
按照衰减倍数调节光学心率传感模组103的信号发射功率，并通过光学心率传感模组103检测用户的心率。
实际在可穿戴设备的工程生产阶段预先在标准测试环境中，针对设置于壳体101表面的光学心率传感模组103与用户佩戴部位的不同的相对偏移角度及相对偏移距离，测量得到对应光信号的衰减数据，并根据测试结果建立光信号的衰减系数模型。通过预先将该衰减系数 模型存储至处理器102中，在计算获得当前光学心率传感模组103相对于用户佩戴部位的相对偏移距离及相对偏移角度后，可根据该衰减系数模型查询获得对应的衰减系数k(h)。
需要说明的是，光学心率传感模组103发射的光信号的强度为R时，在发生相对位置变化后，光学心率传感模组103检测获得的信号光的反射强度为：
R(h,α)＝k(h)*cos 2(α)*R。
在实际应用中，基于衰减系数及相对偏移角度，计算反射强度的衰减倍数可以包括：
基于衰减系数及相对偏移角度，按照如下衰减倍数计算公式计算获得反射强度的衰减倍数；
衰减倍数计算公式为：M＝k(h)*cos 2(α)；
其中，M表示衰减倍数，h表示相对偏移距离，k(h)表示相对偏移距离h对应的衰减系数。
因此，当光学心率传感模组103检测获得光信号的反射强度减弱后，可以根据计算获得的反射强度的衰减倍数，将光学心率传感模组的信号发射功率调节为原来的1/M倍，以保持光学心率传感模组103接收信号的稳定性。
本发明实施例中，基于预先测试建立光信号的衰减系数与相对偏移角度及相对偏移距离的衰减系数模型，通过计算获得的相对偏移角度及相对偏移距离即可查询获得光信号对应的衰减系数。根据衰减系数可计算获得反射强度的衰减倍数，使得处理器可根据计算获得的衰减倍数实时动态的调节光学心率传感模组的发射功率，保证了光学心率传感模组接收光信号的稳定性，使检测获得的反射强度不受外界及光路改变等因素干扰，大大提高了心率检测的精度。
图2是本发明实施例的一种可穿戴设备的另一个实施例的原理框图，该可穿戴设备除包括图1实施例中的壳体101、安装于壳体101内的处理器102、以及与该处理器102连接并安装于该壳体101面向用户佩戴部位一面上的光学心率传感模组103及距离传感模组104之外，还包括与处理器102连接并设置于壳体101面向用户佩戴部位一面上的压力传感模组105。
压力传感模组105可以包括多个压力传感器，该多个压力传感器以心率传感器模组103为中心，与多个电容传感器间隔设置，等间隔环绕在光学心率传感器模组103外围。
压力传感模组105用于检测并发送壳体101与用户佩戴部位之间的压力参数至处理器102。具体的，针对压力传感模组105中的每个压力传感器，该压力传感器用于检测壳体101上对应该压力传感器的位置点与用户佩戴部位之间的压力值，生成对应该压力传感器的压力参数。
处理器102基于多个用户距离，计算获得光学心率传感模组103与用户佩戴部位的相对位置数据可以包括：
基于各个压力参数，确定数值最大和次大的两个压力参数分别对应的第一压力传感器及第二压力传感器；确定位于第一压力传感器与第二压力传感器之间的第一电容传感器以及与第一电容传感器关于光学心率传感模组103中心对称的第二电容传感器；根据第一电容传感器以及第二电容传感器检测获得的用户距离，计算获得光学心率传感模组103相对于用户佩戴部位的相对位置数据。
在可穿戴设备壳体101部分偏移用户佩戴部位，部分仍与用户佩戴部位贴合时，通过设置多个压力传感器检测壳体上不同位置点处的压力参数，使得处理器可以快速基于检测获得的压力参数确定用户距离差最大的两个电容传感器。
本发明实施例，为了在存在较多电容传感器时，进一步减轻处理器的工作量，将多个压力传感器以光学心率传感模组103为中心设置在光学心率传感模组103外围，且与电容传感器等间隔设置。本发明实施例从多个压力传感器检测得到的多个压力值中获得最大和次大的两个压力值，进而可以直接确定与用户佩戴部位的用户距离最近的第一电容传感器，而与第一电容传感器中心对称的第二电容传感器为用户距离最远的电容传感器。从而可以直接确定用户距离差最大的第一电容传感器及第二电容传感器，不需要再对每两个中心对称的电容传感器的用户距离差一一计算，可以大大提高处理器的处理效率。
由图1实施例可知，光学心率传感模组103相对于用户佩戴部位的相对位置数据可以包括相对偏移距离及相对偏移角度。因此，根据第一电容传感器以及第二电容传感器检测获得的用户距离，计算获得光学心率传感模组103相对于用户佩戴部位的相对位置数据可以包括：
根据第一电容传感器检测获得第一用户距离、第二电容传感器检测获得第二用户距离、第一电容传感器与第二电容传感器之间的第一间隔距离及第一压力传感器或第二压力传感器与光学心率传感模组103的第二间隔距离计算获得光学心率传感模组103与用户佩戴部位的相对偏移距离。
基于第一用户距离、第二用户距离及第一间隔距离，计算获得光学心率传感模组与用户佩戴部位的相对偏移角度。
其中，在该可穿戴设备工程生产阶段预先测量并存储有每个压力传感器与光学心率传感模组103之间的间隔距离。由于各个压力传感器关于中心线对称，每个压力传感器与光学心率传感模组103之间的间隔距离是指每个压力传感器到中心线的垂直距离。
需要说明的是，根据第一电容传感器检测获得第一用户距离、第二电容传感器检测获得 第二用户距离、第一电容传感器与第二电容传感器之间的第一间隔距离及第一压力传感器或第二压力传感器与光学心率传感模组103的第二间隔距离计算获得光学心率传感模组101与用户佩戴部位的相对偏移距离可以包括：
基于第一用户距离、第二用户距离、第一间隔距离及第二间隔距离，按照如下相对偏移距离计算公式计算获得光学心率传感模组103与用户佩戴部位的相对偏移距离：
相对偏移距离计算公式为：h＝(Ha-He)*Dcd/Dae；
其中，h表示相对偏移距离，Ha表示第一用户距离，He表示第二用户距离，Dae表示第一间隔距离，Dcd表示第二间隔距离。
基于平行线分段成比例原理，第一用户距离、第二用户距离及相对偏移距离，均为垂直于用户佩戴部位的平行线，且第一间隔距离平行于第二间隔距离，因此根据平行线分段成比例原理，第一间隔距离与第二间隔距离的比值与第一电容传感器与第二电容传感之间的用户距离差与相对偏移距离的比值相等，从而计算得到相对偏移距离。
基于第一用户距离、第二用户距离及第一间隔距离，计算获得光学心率传感模组103与用户佩戴部位的相对偏移角度可以包括：
基于第一用户距离、第二用户距离及第一间隔距离，按照如下相对偏移角度计算公式计算获得光学心率传感模组103与用户佩戴部位的相对偏移角度；
相对偏移角度计算公式为：α＝arcsin[(Ha-He)/Dae]。
该相对偏移角度的计算方法与图1实施例中的计算方法相同，在此不再赘述。
本发明实施例中，通过设置多个压力传感器检测获得的压力参数确定用户距离差最大的第一电容传感器及第二电容传感器，并基于平行线分段成比例原理得到的相对偏移距离，相比于通过计算平均用户距离得到的相对偏移距离的数值更加精确，避免了求平均值造成的计算误差，提高了相对偏移距离及相对偏移角度的计算精度，使得计算得到的反射强度的衰减倍数更加准确，从而进一步提高了光学心率传感模组心率测量的精度。
在一个实际应用中，光学心率传感模组103可以包括一个光电探测器及两组LED灯，两组LED灯分别与处理器102连接，以实现对该光学心率传感模组信号103发射功率的动态调节。其中，光电探测器位于该光学心率传感模组103的中心，两组LED灯对称设置于该光电探测器左右两侧，使得该光电探测器可以检测获得光信号的反射强度。
在一个实际应用中，该可穿戴设备还可以包括与壳体101连接的固定带；该固定带用于固定该可穿戴设备于用户佩戴部位。
通常可穿戴设备壳体101两端用于连接固定带，在用户运动过程中，壳体发生位置偏移通常是固定带一边的壳体翘起，另一边贴合与用户佩戴部位。为了准确地检测壳体101相对 用户佩戴部位的位置关系，距离传感模组104可以包括四个电容传感器；该四个电容传感器以光学心率传感器模组103为中心，等间隔环绕在光学心率传感器模组103外围；其中，两个电容传感器分别设置于连接固定带的壳体101的两端。
压力传感模组105还可以包括四个压力传感器；四个压力传感器与四个电容传感器等间隔设置，等间隔环绕在光学心率传感器模组103的外围。
该可穿戴设备可以是智能手环或智能手表。如图3为任一智能手表的背面视图。其中，光学心率传感模组103位于壳体101中心，光学心率传感模组103包括一个光电探测器31及两组LED灯32及33。距离传感模组104及压力传感模组105以光学心率传感模组103为中心，间隔设置且等间隔环绕在光学心率传感器模组103外围。其中，距离传感模组104包括4个电容传感器(如图3中所示八边形表示电容传感器)，压力传感模组包括4个压力传感器(如图3中所示菱形表示压力传感器)，处理器102位于壳体101内与分别该距离传感模组104及压力传感模组105以光学心率传感模组103连接，在图3中并未示出。
该智能手表通过表带将手表壳体背面贴合与用户佩戴部位通过光学心率传感模组103进行心率检测。当用户在运动过程中智能手表壳体101相对于用户佩戴部位产生了位置偏移和倾角，如图4所示为该智能手表壳体101相对于佩戴部位的相对位置变化时的侧面状态示意图。压力传感器35此时与用户佩戴部位贴合，此时压力传感器35及压力传感器36检测获得压力参数值最大，从而可以确定位于压力传感器35及压力传感器36之间的电容传感器34为第一电容传感器，与电容传感器34关于光学心率传感模组103中心对称的电容传感器37为第二电容传感器。Dae为电容传感器34及电容传感器37之间的间隔距离即第一间隔距离(直线距离)；Dcd为光学心率传感模组103距压力传感器35或压力传感器36之间的间隔距离(其中，压力传感器35或压力传感器36关于中心线对称，该间隔距离为压力传感器35或压力传感器36距中心线的垂直距离)即第二间隔距离；Ha为第一用户距离，He为第二用户距离；因此通过上述相对偏移距离就是那公式可以计算获得相对偏移距离h，根据上述相对偏移角度计算公式可以计算获得相对偏移角度α。
进一步地，根据计算获得的相对偏移距离h及相对偏移角度α，查询获得对应的衰减系数，并计算获得光信号反射强度的衰减倍数，从而使得处理器根据该衰减倍数实时调节光学心率传感模组的信号发射功率，大大提高了该设备心率检测的精度。
图5是本发明实施例的一种心率检测方法的一个实施例的流程图，应用于可穿戴设备，可穿戴设备包括壳体、安装于壳体内的处理器，以及与处理器连接并安装于壳体面向用户佩 戴部位一面上的光学心率传感模组及距离传感模组。
该方法可以包括：
S501：通过距离传感模组检测光学心率传感模组与用户佩戴部位之间的位置关系，得到光学心率传感模组相对于用户佩戴部位的相对位置数据。
S502：根据相对位置数据，调节光学心率传感模组的信号发射功率。
S503：通过光学心率传感模组检测用户的心率。
前述已经详细说明本发明实施例的可行方案在此不再赘述。
本发明实施例中，通过距离传感模组实时检测光学心率传感模组与用户佩戴部位之间的位置关系，并由处理器根据该位置关系计算获得相对位置数据以动态调节该光学心率传感模组发射信号光的光强度。从而保证了光学心率传感模组检测获得用户心率的准确性，大大提高了心率的检测精度。
为了更加准确地检测光学心率传感模组与用户佩戴部位之间的位置关系，距离传感模组可以包括多个电容传感器。且光学心率传感模组安装在壳体面向用户佩戴部位一面的中心位置，多个电容传感器以光学心率传感器模组为中心，等间隔环绕在光学心率传感器模组外围。
通过距离传感模组检测光学心率传感模组与用户佩戴部位之间的位置关系，得到光学心率传感模组相对于用户佩戴部位的相对位置数据可以包括：
针对每个电容传感器，基于该电容传感器检测获得的电容参数，计算壳体上对应该电容传感器的位置点与用户佩戴部位之间的用户距离；基于多个用户距离，计算获得光学心率传感模组与用户佩戴部位的相对位置数据。
需要说明的是，处理器针对各个电容参数，计算获得各个电容传感器到用户佩戴部位的用户距离可以包括：针对各个电容参数，按照如下用户距离计算公式计算获得各个电容传感器到用户佩戴部位的用户距离。
用户距离计算公式可以表示为：H＝ε*S/C；
其中，H表示任一个电容传感器到用户佩戴部位的用户距离，C表示任一个电容传感器检测获得的电容参数，ε表示空气介电常数，S表示任一个电容传感器的表面积。
本发明实施例中，通过在壳体面向用户佩戴部位的一面设置多个电容传感器，通过电容传感器检测获得的电容参数计算获得用户佩戴部位到每个电容传感器的用户距离，从而可以从多个方位获知壳体相对于用户佩戴部位的位置关系，进一步计算获得位于壳体中心位置的光学心率传感模组相对于用户佩戴部位的相对位置数据。
在用户运动过程中，为了能够准确地反映出可穿戴设备与用户佩戴部位的相对位置的变化，通常可以距离和倾角两个参数来体现相对位置的变化。因此，光学心率传感模组相对于 用户佩戴部位的相对位置数据可以包括相对偏移距离及相对偏移角度。可选地，基于多个用户距离，计算获得光学心率传感模组与用户佩戴部位的相对位置数据可以包括：
基于多个用户距离，计算多个电容传感器到用户佩戴部位的平均用户距离。
确定平均用户距离为光学心率传感模组与佩戴部位的相对偏移距离。
基于多个用户距离，确定用户距离差最大且关于光学心率传感模组中心对称的第三电容传感器及第四电容传感器。
基于第三电容传感器检测获得的第三用户距离、第四电容传感器检测获得的第四用户距离及第三电容传感器与第四电容传感器之间的第三间隔距离，计算获得光学心率传感模组与用户佩戴部位的相对偏移角度。
需要说明的是，基于多个用户距离，计算多个电容传感器到用户佩戴部位的平均用户距离可以按照以下公式计算获得：
Figure PCTCN2018096188-appb-000002
确定相对偏移距离为：h＝H ave。
基于第三电容传感器检测获得的第三用户距离、第四电容传感器检测获得的第四用户距离及第三电容传感器与第四电容传感器之间的第三间隔距离，可以按照下述相对偏移角度计算公式计算获得光学心率传感模组与用户佩戴部位的相对偏移角度；
相对偏移角度计算公式为：α＝arcsin[(Hd-Hg)/Ddg]；
其中，Hd表示第三用户距离，Hg表示第四用户距离，Ddg表示第三间隔距离。
本发明实施例中，不仅适用于可穿戴设备壳体部分贴合于用户佩戴部位时，对相对偏移数据的计算，还可以适用于当该可穿戴设备壳体全部脱离(没有贴合部分)用户佩戴时的相对偏移数据的计算，因此更适合于用户运动幅度较大时，对佩戴可穿戴设备的光学心率传感模组发射光信号功率进行动态调整的场景。
需要说明的是，根据相对位置数据，调节光学心率传感模组的信号发射功率，并通过光学心率传感模组检测用户的心率可以包括：根据预设衰减参数调整规则，确定与相对偏移距离对应的衰减系数。
其中，预设衰减参数调整规则预先存储于可穿戴设备中，预设衰减参数调整规则中包含相对偏移距离与衰减系数的对应关系。
基于衰减系数及相对偏移角度，计算反射强度的衰减倍数。
按照衰减倍数调节光学心率传感模组的信号发射功率，并通过光学心率传感模组检测用户的心率。
在实际应用中，基于衰减系数及相对偏移角度，计算反射强度的衰减倍数可以包括：
基于衰减系数及相对偏移角度，按照如下衰减倍数计算公式计算获得反射强度的衰减倍数；
衰减倍数计算公式为：M＝k(h)*cos 2(α)；
其中，M表示衰减倍数，h表示相对偏移距离，k(h)表示相对偏移距离h对应的衰减系数。
因此，当光学心率传感模组检测获得光信号的反射强度减弱后，可以根据计算获得的反射强度的衰减倍数，将光学心率传感模组的信号发射功率调节为原来的1/M倍，以保持光学心率传感模组接收信号的稳定性。
本发明实施例中，基于预先测试建立光信号的衰减系数与相对偏移角度及相对偏移距离的衰减系数模型，通过计算获得的相对偏移角度及相对偏移距离即可查询获得光信号对应的衰减系数。根据衰减系数可计算获得反射强度的衰减倍数，使得处理器可根据计算获得的衰减倍数实时动态的调节光学心率传感模组的发射功率，保证了光学心率传感模组接收光信号的稳定性，使检测获得的反射强度不受外界及光路改变等因素干扰，大大提高了心率检测的精度。
图6是本发明实施例的一种心率检测方法的另一个实施例的流程图，该方法应用于可穿戴设备。
可穿戴设备除包括图5实施实例中的壳体、安装于壳体内的处理器，以及与处理器连接并安装于壳体面向用户佩戴部位一面上的光学心率传感模组及距离传感模组外，还包括与处理器连接并设置于壳体面向用户佩戴部位一面上的压力传感模组。
压力传感模组包括多个压力传感器；多个压力传感器以心率传感器模组为中心，与多个电容传感器间隔设置，等间隔环绕在光学心率传感器模组外围。
该方法可以包括：
S601：基于多个电容传感器检测获得的电容参数，计算通过多个电容传感器分别检测壳体上不同位置点处与用户佩戴部位之间的用户距离。
S602：通过压力传感模组检测壳体上不同位置点处与用户佩戴部位之间的压力参数。
S603：基于各个压力参数，确定数值最大和次大的两个压力参数分别对应的第一压力传感器及第二压力传感器。
S604：确定位于第一压力传感器与第二压力传感器之间的电容传感器为第一电容传感器，以及与第一电容传感器关于光学心率传感模组中心对称的第二电容传感器。
S605：根据第一电容传感器以及第二电容传感器检测获得的用户距离，计算获得光学心率传感模组相对于用户佩戴部位的相对位置数据。
S606：根据相对位置数据，调节光学心率传感模组的信号发射功率。
S607：通过光学心率传感模组检测用户的心率。
其中，根据第一电容传感器以及第二电容传感器检测获得的用户距离，计算获得光学心率传感模组相对于用户佩戴部位的相对位置数据可以包括：
根据第一电容传感器检测获得第一用户距离、第二电容传感器检测获得第二用户距离、第一电容传感器与第二电容传感器之间的第一间隔距离及第一压力传感器或第二压力传感器与光学心率传感模组的第二间隔距离计算获得光学心率传感模组与用户佩戴部位的相对偏移距离。
基于第一用户距离、第二用户距离及第一间隔距离，计算获得光学心率传感模组与用户佩戴部位的相对偏移角度。
需要说明的是，根据第一电容传感器检测获得第一用户距离、第二电容传感器检测获得第二用户距离、第一电容传感器与第二电容传感器之间的第一间隔距离及第一压力传感器或第二压力传感器与光学心率传感模组的第二间隔距离计算获得光学心率传感模组与用户佩戴部位的相对偏移距离可以包括：基于第一用户距离、第二用户距离、第一间隔距离及第二间隔距离，按照如下相对偏移距离计算公式计算获得光学心率传感模组与用户佩戴部位的相对偏移距离，相对偏移距离计算公式为：h＝(Ha-He)*Dcd/Dae；
其中，h表示相对偏移距离，Ha表示第一用户距离，He表示第二用户距离，Dae表示第一间隔距离，Dcd表示第二间隔距离。
基于第一用户距离、第二用户距离及第一间隔距离，计算获得光学心率传感模组与用户佩戴部位的相对偏移角度可以包括：基于第一用户距离、第二用户距离及第一间隔距离，按照如下相对偏移角度计算公式计算获得光学心率传感模组与用户佩戴部位的相对偏移角度；
相对偏移角度计算公式为：α＝arcsin[(Ha-He)/Dae]。
前述已经详细说明本发明实施例的可行方案在此不再赘述。
本发明实施例中，通过设置多个压力传感器检测获得的压力参数确定用户距离差最大的第一电容传感器及第二电容传感器，并基于平行线分段成比例原理得到的相对偏移距离较通过计算平均用户距离得到的相对偏移距离的数值更加精确，避免了求平均值造成的计算误差，提高了相对偏移距离及相对偏移角度的计算精度，使得计算得到的反射强度的衰减倍数更加准确，从而进一步光学心率传感模组心率测量的精度。
在一个典型的配置中，计算设备包括一个或多个处理器(CPU)、输入/输出接口、网络接口和内存。
内存可能包括计算机可读介质中的非永久性存储器，随机存取存储器(RAM)和/或非 易失性内存等形式，如只读存储器(ROM)或闪存(flash RAM)。内存是计算机可读介质的示例。
计算机可读介质包括永久性和非永久性、可移动和非可移动媒体可以由任何方法或技术来实现信息存储。信息可以是计算机可读指令、数据结构、程序的模块或其他数据。计算机的存储介质的例子包括，但不限于相变内存(PRAM)、静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、其他类型的随机存取存储器(RAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、快闪记忆体或其他内存技术、只读光盘只读存储器(CD-ROM)、数字多功能光盘(DVD)或其他光学存储、磁盒式磁带，磁带磁磁盘存储或其他磁性存储设备或任何其他非传输介质，可用于存储可以被计算设备访问的信息。按照本文中的界定，计算机可读介质不包括非暂存电脑可读媒体(transitory media)，如调制的数据信号和载波。
如在说明书及权利要求当中使用了某些词汇来指称特定组件。本领域技术人员应可理解，硬件制造商可能会用不同名词来称呼同一个组件。本说明书及权利要求并不以名称的差异来作为区分组件的方式，而是以组件在功能上的差异来作为区分的准则。如在通篇说明书及权利要求当中所提及的“包含”为一开放式用语，故应解释成“包含但不限定于”。“大致”是指在可接收的误差范围内，本领域技术人员能够在一定误差范围内解决技术问题，基本达到技术效果。此外，“耦接”一词在此包含任何直接及间接的电性耦接手段。因此，若文中描述一第一装置耦接于一第二装置，则代表第一装置可直接电性耦接于第二装置，或通过其他装置或耦接手段间接地电性耦接至第二装置。说明书后续描述为实施本发明的较佳实施方式，然描述乃以说明本发明的一般原则为目的，并非用以限定本发明的范围。本发明的保护范围当视所附权利要求所界定者为准。
还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的商品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种商品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括要素的商品或者系统中还存在另外的相同要素
上述说明示出并描述了本发明的若干优选实施例，但如前，应当理解本发明并非局限于本文所披露的形式，不应看作是对其他实施例的排除，而可用于各种其他组合、修改和环境，并能够在本文申请构想范围内，通过上述教导或相关领域的技术或知识进行改动。而本领域人员所进行的改动和变化不脱离本发明的精神和范围，则都应在本发明所附权利要求的保护范围内。

Claims (17)

  1. 一种心率检测方法，其中，应用于可穿戴设备，所述可穿戴设备包括壳体、安装于所述壳体内的处理器，以及与所述处理器连接并安装于所述壳体面向用户佩戴部位一面上的光学心率传感模组及距离传感模组；
    所述方法包括：
    通过所述距离传感模组检测所述光学心率传感模组与用户佩戴部位之间的位置关系，得到所述光学心率传感模组相对于所述用户佩戴部位的相对位置数据；
    根据所述相对位置数据，调节所述光学心率传感模组的信号发射功率，并通过所述光学心率传感模组检测用户的心率。
  2. 根据权利要求1所述的方法，其中，所述距离传感模组包括多个电容传感器，所述光学心率传感模组安装在所述壳体面向用户佩戴部位一面的中心位置，所述多个电容传感器以所述光学心率传感模组为中心，等间隔环绕在所述光学心率传感模组外围；
    所述通过所述距离传感模组检测所述光学心率传感模组与用户佩戴部位之间的位置关系，得到所述光学心率传感模组相对于所述用户佩戴部位的相对位置数据包括：
    针对每个电容传感器，基于该电容传感器检测获得的电容参数，计算所述壳体上对应该电容传感器的位置点与所述用户佩戴部位之间的用户距离；
    基于多个用户距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对位置数据。
  3. 根据权利要求2所述的方法，其中，所述基于多个用户距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对位置数据包括：
    选择与用户佩戴部位距离最近的第一电容传感器以及与所述第一电容传感器关于所述光学心率传感模组中心对称的第二电容传感器；
    根据所述第一电容传感器以及所述第二电容传感器检测获得的用户距离，计算获得所述光学心率传感模组相对于所述用户佩戴部位的相对位置数据。
  4. 根据权利要求3所述的方法，其中，所述可穿戴设备还包括与所述处理器连接并设置于所述壳体面向用户佩戴部位一面上的压力传感模组；所述压力传感模组包括多个压力传感器；所述多个压力传感器以所述心率传感器模组为中心，与所述多个电容传感器间隔设置，等间隔环绕在所述光学心率传感器模组外围；
    所述方法还包括：
    通过所述压力传感模组检测所述壳体与所述用户佩戴部位之间的压力参数；
    所述选择与用户佩戴部位距离最近的第一电容传感器包括：
    基于各个压力参数，确定数值最大和次大的两个压力参数分别对应的第一压力传感器及第二压力传感器；
    确定位于所述第一压力传感器与所述第二压力传感器之间的电容传感器为第一电容传感器。
  5. 根据权利要求4所述的方法，其中，所述根据所述第一电容传感器以及所述第二电容传感器检测获得的用户距离，计算获得所述光学心率传感模组相对于所述用户佩戴部位的相对位置数据包括：
    根据所述第一电容传感器检测获得第一用户距离、所述第二电容传感器检测获得第二用户距离、所述第一电容传感器与所述第二电容传感器之间的第一间隔距离及所述第一压力传感器或所述第二压力传感器与所述光学心率传感模组的第二间隔距离计算获得所述光学心率传感模组与所述用户佩戴部位的相对偏移距离；
    基于所述第一用户距离、所述第二用户距离及所述第一间隔距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对偏移角度。
  6. 根据权利要求2所述方法，其中，所述基于多个用户距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对位置数据包括：
    基于所述多个用户距离，计算所述多个电容传感器到所述用户佩戴部位的平均用户距离；
    确定所述平均用户距离为所述光学心率传感模组与所述佩戴部位的相对偏移距离；
    基于所述多个用户距离，确定用户距离差最大且关于所述光学心率传感模组中心对称的第三电容传感器及第四电容传感器；
    基于所述第三电容传感器检测获得的第三用户距离、所述第四电容传感器检测获得的第四用户距离及所述第三电容传感器与所述第四电容传感器之间的第三间隔距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对偏移角度。
  7. 根据权利要求1所述方法，其中，所述光学心率传感模组相对于所述用户佩戴部位的相对位置数据包括相对偏移距离及相对偏移角度；
    所述根据所述相对位置数据，调节所述光学心率传感模组的信号发射功率，并通过所述光学心率传感模组检测用户的心率包括：
    根据预设衰减参数调整规则，确定与所述相对偏移距离对应的衰减系数；其中，所述预设衰减参数调整规则预先存储于所述可穿戴设备中，所述预设衰减参数调整规则中包含相对偏移距离与衰减系数的对应关系；
    基于所述衰减系数及所述相对偏移角度，计算所述反射强度的衰减倍数；
    按照所述衰减倍数调节所述光学心率传感模组的信号发射功率，并通过所述光学心率传感模组检测用户的心率。
  8. 根据权利要求5所述的方法，其中，所述根据所述第一电容传感器检测获得第一用户距离、所述第二电容传感器检测获得第二用户距离、所述第一电容传感器与所述第二电容传感器之间的第一间隔距离及所述第一压力传感器或所述第二压力传感器与所述光学心率传感模组的第二间隔距离计算获得所述光学心率传感模组与所述用户佩戴部位的相对偏移距离包括：
    基于所述第一用户距离、所述第二用户距离、所述第一间隔距离及所述第二间隔距离，按照如下相对偏移距离计算公式计算获得所述光学心率传感模组与所述用户佩戴部位的相对偏移距离；
    所述相对偏移距离计算公式为：h＝(Ha-He)*Dcd/Dae；
    所述基于所述第一用户距离、所述第二用户距离及所述第一间隔距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对偏移角度包括：
    基于所述第一用户距离、所述第二用户距离及所述第一间隔距离，按照如下相对偏移角度计算公式计算获得所述光学心率传感模组与所述用户佩戴部位的相对偏移角度；
    所述相对偏移角度计算公式为：α＝arcsin[(Ha-He)/Dae]；
    其中，Ha表示所述第一用户距离，He表示所述第二用户距离，Dae表示所述第一间隔距离，Dcd表示所述第二间隔距离。
  9. 根据权利要求7所述的方法，其中，所述基于所述衰减系数及所述相对偏移角度，计算所述反射强度的衰减倍数包括：
    基于所述衰减系数及所述相对偏移角度，按照如下衰减倍数计算公式计算获得所述反射强度的衰减倍数；
    所述衰减倍数计算公式为：M＝k(h)*cos 2(α)；
    其中，M表示所述衰减倍数，h表示相对偏移距离，k(h)表示所述相对偏移距离h对应的衰减系数，α表示所述相对偏移角度。
  10. 一种可穿戴设备，其中，包括壳体、安装于所述壳体内的处理器，以及与所述处理器连接并安装于所述壳体面向用户佩戴部位一面上的光学心率传感模组及距离传感模组；
    所述光学心率传感模组用于发射光信号，并检测所述光信号的反射强度；将所述反射强度发送至所述处理器；
    距离传感模组用于将检测获得的所述光学心率传感模组与所述用户佩戴部位之间的位置关系发送至所述处理器；
    所述处理器用于根据所述距离传感模组检测所述光学心率传感模组与用户佩戴部位之间的位置关系，得到所述光学心率传感模组相对于所述用户佩戴部位的相对位置数据；根据所述相对位置数据，调节所述光学心率传感模组的信号发射功率，并通过所述光学心率传感模组检测用户的心率。
  11. 根据权利要求10所述的设备，其中，所述距离传感模组包括多个电容传感器；所述光学心率传感模组安装在所述壳体面向用户佩戴部位一面的中心位置，所述多个电容传感器以所述光学心率传感器模组为中心，等间隔环绕在所述光学心率传感器模组外围；
    所述处理器用于：针对每个电容传感器，基于该电容传感器检测获得的电容参数，计算所述壳体上对应该电容传感器的位置点与所述用户佩戴部位之间的用户距离；基于多个用户距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对位置数据。
  12. 根据权利要求11所述的设备，其中，所述设备还包括与所述处理器连接并设置于所述壳体面向用户佩戴部位一面上的压力传感模组；所述压力传感模组包括多个压力传感器；所述多个压力传感器以所述光学心率传感器模组为中心，与所述多个电容传感器间隔设置，等间隔环绕在所述光学心率传感器模组外围；
    所述压力传感模组用于检测并发送所述壳体与用户佩戴部位之间的压力参数至所述处理器；
    所述处理器基于多个用户距离，计算获得所述光学心率传感模组与所述用户佩戴部位的相对位置数据包括：
    基于各个压力参数，确定数值最大和次大的两个压力参数分别对应的第一压力传感器及第二压力传感器；确定位于所述第一压力传感器与所述第二压力传感器之间的第一电容传感器以及与所述第一电容传感器关于所述光学心率传感模组中心对称的第二电容传感器；根据所述第一电容传感器以及所述第二电容传感器检测获得的用户距离，计算获得所述光学心率传感模组相对于所述用户佩戴部位的相对位置数据。
  13. 根据权利要求10所述的设备，其中，所述光学心率传感模组包括多组发光二极管LED灯用于发射光信号，以及一个或多个光电探测器用于检测用户佩戴部位反射的光信号的光强度。
  14. 根据权利要求13所述的设备，其中，所述光学心率传感模组包括一个光电探测器及两组LED灯；
    所述光电探测器位于所述光学心率传感模组的中心，所述两组LED灯对称设置于所述 光电探测器左右两侧，以使所述光电探测器检测获得用户佩戴部位反射的光信号的光强度。
  15. 根据权利要求10所述的设备，其中，还包括与所述壳体连接的固定带；所述固定带用于固定所述可穿戴设备于用户佩戴部位。
  16. 根据权利要求15所述的设备，其特征在于，所述壳体两端连接所述固定带；所述距离传感模组包括四个电容传感器；所述四个电容传感器以所述光学心率传感器模组为中心，等间隔环绕在所述光学心率传感器模组外围；其中，两个电容传感器分别设置于连接所述固定带的壳体的两端。
  17. 根据权利要求16所述的设备，其中，还包括压力传感器模组；所述压力传感模组包括四个压力传感器；所述四个压力传感器与所述四个电容传感器等间隔设置，等间隔环绕在所述光学心率传感器模组外围。
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