WO2017031665A1 - 光电反射心率检测方法及装置 - Google Patents

光电反射心率检测方法及装置 Download PDF

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Publication number
WO2017031665A1
WO2017031665A1 PCT/CN2015/087924 CN2015087924W WO2017031665A1 WO 2017031665 A1 WO2017031665 A1 WO 2017031665A1 CN 2015087924 W CN2015087924 W CN 2015087924W WO 2017031665 A1 WO2017031665 A1 WO 2017031665A1
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Prior art keywords
brightness
waveform
heart rate
optimal
frequency
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PCT/CN2015/087924
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English (en)
French (fr)
Inventor
刘均
蔡文活
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深圳还是威健康科技有限公司
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Application filed by 深圳还是威健康科技有限公司 filed Critical 深圳还是威健康科技有限公司
Priority to CN201580070957.6A priority Critical patent/CN107920767B/zh
Priority to PCT/CN2015/087924 priority patent/WO2017031665A1/zh
Publication of WO2017031665A1 publication Critical patent/WO2017031665A1/zh

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Classifications

    • 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
    • A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals

Definitions

  • the invention relates to the field of heart rate detection, and in particular to a photoelectric reflection heart rate detecting method and device.
  • Photoelectric reflection heart rate detection mainly detects the heart rate signal of the human body indirectly by detecting changes in the light returned by the human blood.
  • the heart rate signal obtained by the reflected light signal through the human body is very weak, and at the same time, the brightness of the required optical signal is different because each person's skin color, fat and thin constitutional conditions are different.
  • the brightness of the emitted light signal is fixed, thereby causing the heart rate signal to be unstable due to different skin condition, fat and thin body conditions, and the measurement success rate is low.
  • the heart rate signal is almost undetectable. Therefore, in the existing photoelectric reflection heart rate detection process, since the brightness of the emitted optical signal is not suitable for the physical condition of the person to be detected, and the accuracy of the heart rate detection is low, the problem in this aspect needs to be solved by the inventor.
  • the main object of the present invention is to solve the problem that the accuracy of heart rate detection is low due to the fact that the brightness of the emitted optical signal is not suitable for the physical condition of the person to be detected during the photoelectric reflection heart rate detection process.
  • the present invention provides a photoelectric reflection heart rate detecting method, and the photoelectric reflection heart rate detecting method includes the following steps:
  • the corresponding brightness is taken as the optimal brightness
  • the LED light source is controlled to emit an optical signal according to the optimal brightness, and heart rate detection is performed.
  • the method further includes:
  • the LED light source is controlled to emit an optical signal according to a preset brightness, and heart rate detection is performed.
  • the step of adjusting the brightness of the LED light source according to a preset manner and detecting the frequency waveform corresponding to each brightness includes:
  • Receiving the heart rate detection command controlling the LED light source to emit the first light signal by decreasing the brightness by the maximum brightness
  • the optimal waveform is a waveform in which the ratio of the step waveform to the entire waveform is less than or equal to a preset ratio threshold;
  • the step of determining whether the frequency waveform corresponding to each brightness is an optimal waveform includes:
  • the frequency waveform is determined to be the optimal waveform when the determined ratio is less than or equal to the proportional threshold.
  • the optimal waveform is a waveform in which the length of the longest staircase wave is less than or equal to a preset length threshold;
  • the step of determining whether the frequency waveform corresponding to each brightness is an optimal waveform includes:
  • the frequency waveform is determined to be the optimal waveform when the determined length is less than or equal to the length threshold.
  • the step of determining whether the frequency waveform corresponding to each brightness is an optimal waveform comprises:
  • the frequency waveform is the optimal waveform.
  • the preset manner is to control the LED light source to emit the first optical signal by increasing the brightness by the lowest brightness until the optimal waveform is detected or increased to the maximum brightness of the LED light source.
  • the present invention further provides a photoelectric reflection heart rate detecting device, wherein the photoelectric reflection heart rate detecting device comprises:
  • the adjusting module is configured to adjust the brightness of the LED light source according to a preset manner when receiving the heart rate detecting instruction, and detect a frequency waveform corresponding to each brightness;
  • a determining module configured to use a corresponding brightness as an optimal brightness when detecting that the frequency waveform is an optimal waveform
  • the heart rate detecting module is configured to control the LED light source to emit an optical signal according to the optimal brightness, and perform heart rate detection.
  • the heart rate detecting module is further configured to: when detecting that all frequency waveforms corresponding to the respective brightnesses are not optimal waveforms, control the LED light source to emit an optical signal according to a preset brightness, and perform heart rate detection.
  • the adjustment module includes a control unit, a conversion unit, and a determination unit;
  • the control unit is configured to, when receiving the heart rate detection instruction, control the LED light source to emit the first optical signal by decreasing the brightness by the maximum brightness;
  • the converting unit is configured to receive a second optical signal that is reflected by the first optical signal, and convert a second optical signal corresponding to each brightness into a corresponding frequency waveform;
  • the determining unit is configured to determine whether the frequency waveform corresponding to each brightness is an optimal waveform.
  • the determining unit includes a first parsing subunit, a first comparing subunit, and a first determining subunit;
  • the first parsing subunit is configured to parse the frequency waveform, and determine a ratio of a staircase wave in the frequency waveform to a whole waveform;
  • the first comparison subunit is configured to compare the determined ratio with the proportional threshold
  • the first determining subunit is configured to determine that the frequency waveform is the optimal waveform when the determined ratio is less than or equal to the proportional threshold.
  • the determining unit includes a second parsing subunit, a second comparing subunit, and a second determining subunit;
  • the second parsing subunit is configured to parse the frequency waveform, and determine a length of a longest step wave in the frequency waveform;
  • the second comparison subunit is configured to compare the determined length with the length threshold
  • the second determining subunit is configured to determine that the frequency waveform is the optimal waveform when the determined length is less than or equal to the length threshold.
  • the determining unit is further configured to determine whether a ratio of the step wave to the entire waveform in the frequency waveform is less than or equal to a preset proportional threshold;
  • the determining unit is further configured to: when the ratio of the step wave in the frequency waveform to the entire segment waveform is less than or equal to a preset proportional threshold, determine whether the length of the longest step wave in the frequency waveform is less than or equal to Set the length threshold;
  • the determining unit is further configured to determine that the frequency waveform is the optimal waveform when a length of the longest step wave in the frequency waveform is less than or equal to the length threshold.
  • the preset manner is to control the LED light source to emit the first optical signal by increasing the brightness by the lowest brightness until the optimal waveform is detected or increased to the maximum brightness of the LED light source.
  • the invention adjusts the brightness of the LED light source, detects the frequency waveform corresponding to each brightness, uses the brightness when the optimal waveform is detected as the optimal brightness, and emits the light signal according to the optimal brightness to perform heart rate detection, so that the photoelectric reflection detects the heart rate.
  • the emitted optical signal can be adapted to the physical condition of the person to be detected, so that the detected frequency waveform amplitude is significantly and excessively smooth, and the accuracy of the heart rate detection is improved.
  • FIG. 1 is a schematic flow chart of a first embodiment of a photoelectric reflection heart rate detecting method according to the present invention
  • FIG. 2 is a schematic view showing a sawtooth waveform of a non-optimal waveform of the present invention
  • Figure 3 is a schematic view of the optimum waveform of the present invention.
  • FIG. 4 is a schematic flow chart of a second embodiment of a photoelectric reflection heart rate detecting method according to the present invention.
  • FIG. 5 is a schematic flow chart of a third embodiment of a photoelectric reflection heart rate detecting method according to the present invention.
  • FIG. 6 is a schematic flow chart of a fourth embodiment of a photoelectric reflection heart rate detecting method according to the present invention.
  • FIG. 7 is a schematic diagram of functional modules of a first embodiment of a photoelectric reflection heart rate detecting device of the present invention.
  • FIG. 8 is a schematic diagram of functional modules of a second embodiment of a photoelectric reflection heart rate detecting device of the present invention.
  • FIG. 9 is a schematic diagram of functional modules of a third embodiment of the photoelectric reflection heart rate detecting device of the present invention.
  • FIG. 10 is a schematic diagram of functional modules of a fourth embodiment of the photoelectric reflection heart rate detecting device of the present invention.
  • the main solution of the embodiment of the present invention is: when receiving the heart rate detection instruction, adjusting the brightness of the LED light source according to a preset manner, and detecting a frequency waveform corresponding to each brightness; when detecting that the frequency waveform is an optimal waveform, The corresponding brightness is taken as the optimal brightness; the LED light source is controlled to emit an optical signal according to the optimal brightness, and heart rate detection is performed.
  • the present invention provides a photoelectric reflection heart rate detecting method.
  • FIG. 1 is a schematic flow chart of a first embodiment of a photoelectric reflection heart rate detecting method according to the present invention.
  • the photoelectric reflection heart rate detecting method includes the following steps:
  • Step S10 when receiving the heart rate detection command, adjusting the brightness of the LED light source according to a preset manner, and detecting a frequency waveform corresponding to each brightness;
  • the LED light source is used to emit an optical signal required for heart rate detection, and the LED light source can emit optical signals of different brightness under the control of a microprocessor.
  • the LED light source is a double green LED light source, and the double green LED light source is an LED light source with a 570 nm emission wavelength, and the measurement precision is higher.
  • the preset manner may be: controlling the LED light source to emit the first optical signal by decreasing the brightness by the maximum brightness, until the optimal waveform is detected or reduced to a preset minimum brightness; or the preset manner may also be And controlling the LED light source to emit the first optical signal by increasing the brightness by the minimum brightness until the optimal waveform is detected or increased to the maximum brightness of the LED light source.
  • the current data is outputted by the microprocessor to the current source chip, and the current source chip outputs a corresponding current to drive the LED light source to emit an optical signal required for heart rate detection.
  • the current source chip is preferably an adjustable current source chip, and the current output by the adjustable current source chip is controlled by a microprocessor to adjust the brightness of the optical signal emitted by the LED light source.
  • Step S20 when detecting that the frequency waveform is an optimal waveform, using the corresponding brightness as the optimal brightness;
  • the optimal waveform may be a waveform in which the ratio of the step waveform to the entire waveform is less than or equal to the preset ratio threshold; or the optimal waveform may be the length of the longest step wave being less than or equal to the preset length threshold. Or the optimal waveform may be a waveform in which the ratio of the staircase waveform to the entire waveform is less than or equal to the preset ratio threshold, and the length of the longest staircase wave is less than or equal to the preset length threshold.
  • FIG. 2 is a schematic diagram of a sawtooth waveform of a non-optimal waveform in the present invention
  • FIG. 3 is a schematic diagram of an optimum waveform in the present invention.
  • the corresponding brightness is taken as the optimal brightness, and the current value of the corresponding LED light source is recorded, and the adjustable current source chip is controlled to the constant current value.
  • the LED light source is driven to emit an optical signal for heart rate detection.
  • Step S30 controlling the LED light source to emit an optical signal according to the optimal brightness, and performing heart rate detection.
  • the LED light source can be controlled by the microprocessor to emit a constant brightness optical signal according to the optimal brightness for heart rate detection. Performing a process of photoelectric reflection heart rate detection, preferably, by controlling the LED light source to emit a constant brightness optical signal according to the optimal brightness, and completing the heart rate by the photoelectric conversion principle and the counting measurement principle of the microprocessor Detection.
  • the LED light source is controlled to emit an optical signal according to a preset brightness, and heart rate detection is performed.
  • the preset brightness is a preset default LED light source brightness when the optimal brightness is not detected.
  • the optical signal is emitted according to the preset brightness.
  • the LED light source may be controlled to continuously emit the first light signal by decreasing the brightness by the maximum brightness until decreasing to a preset minimum brightness, and the LED light source is lowered to the minimum brightness.
  • the LED light source is controlled to perform heart rate detection according to the minimum brightness.
  • the brightness when the optimal waveform is detected is taken as the optimal brightness, and the heart rate detection is performed according to the optimal brightness emission optical signal, so that the photoelectric reflection detection is performed.
  • the emitted light signal can adapt to the physical condition of the person to be detected, so that the detected frequency waveform amplitude is obviously and excessively smooth, and the accuracy of heart rate detection is improved.
  • FIG. 4 is a schematic flow chart of a second embodiment of a photoelectric reflection heart rate detecting method according to the present invention. Based on the first embodiment of the above-described photoelectric reflection heart rate detecting method, the step S10 includes:
  • Step S11 when receiving the heart rate detection command, controlling the LED light source to emit the first light signal by decreasing the brightness by the maximum brightness
  • the heart rate detection instruction may trigger the heart rate detection instruction by using the physical button for performing heart rate detection; or, by providing a shortcut icon for heart rate detection, detecting that the user is based on the The heart rate detection command triggered by the shortcut icon; or a touch button for heart rate detection may be provided, and the heart rate detection command is triggered when a touch operation by the user based on the touch button is detected.
  • the first optical signal is a light signal with a constant brightness emitted by the LED light source to the human body, for detecting a second optical signal reflected by the human body, and determining a corresponding frequency waveform according to the light intensity of the second optical signal,
  • the change of the two light signals is synchronized with the changes of the human blood, and is further synchronized with the change of the heart rate of the human body.
  • the adjustable current source chip may be controlled by the microprocessor to output a saturation current of the LED light source to drive the LED light source to emit a first optical signal according to a maximum brightness, and detect a corresponding frequency waveform when the maximum brightness is generated; if the frequency waveform If it is not the optimal waveform, the microprocessor can control the adjustable current source chip to lower the first-level (preferably, 5 mA is one-stage) driving current to reduce the brightness of the LED light source to emit the first optical signal, and detect the corresponding frequency. Waveform; if the frequency waveform is not the optimal waveform, the microprocessor can control the adjustable current source chip to reduce the first-level driving current again to further reduce the brightness of the LED light source to emit the first optical signal, and detect the corresponding frequency waveform.
  • the microprocessor can control the adjustable current source chip to reduce the first-level driving current again to further reduce the brightness of the LED light source to emit the first optical signal, and detect the corresponding frequency waveform.
  • the above steps are repeated until the LED light source is lowered to a preset minimum brightness.
  • the minimum brightness is the brightness of the LED light source corresponding to the preset lower limit current, so that when the LED light source is lowered to the minimum brightness, if the optimal waveform is not detected, the heart rate detection is performed according to the default brightness.
  • Step S12 receiving a second optical signal reflected by the first optical signal, and converting a second optical signal corresponding to each brightness into a corresponding frequency waveform;
  • the second optical signal reflected by the first optical signal is received by the optical frequency receiving converter, and the second optical signal corresponding to each brightness is converted into a corresponding frequency waveform by the optical frequency receiving converter.
  • step S13 it is determined whether the frequency waveform corresponding to each brightness is an optimum waveform.
  • the converted frequency waveform can be sent to the microprocessor through the optical frequency conversion receiver, and the microprocessor determines whether the frequency waveform corresponding to each brightness is the optimal waveform through the signal waveform judgment algorithm.
  • the frequency waveform corresponding to each brightness may be determined whether there is a sawtooth wave or a smooth wave to determine whether the frequency waveform is an optimal waveform. When there is no sawtooth wave or smooth wave in the frequency waveform, the frequency waveform is determined to be The best waveform.
  • the brightness when the optimal waveform is detected is taken as the optimal brightness, and the heart rate detection is performed according to the optimal brightness emission optical signal, so that the photoelectric reflection detection is performed.
  • the emitted light signal can adapt to the physical condition of the person to be detected, so that the detected frequency waveform amplitude is obviously and excessively smooth, and the accuracy of heart rate detection is improved.
  • FIG. 5 is a schematic flow chart of a third embodiment of a photoelectric reflection heart rate detecting method according to the present invention. Based on the second embodiment of the photoelectric reflection heart rate detecting method, the step S13 includes:
  • Step S310 parsing the frequency waveform, and determining a ratio of a step wave in the frequency waveform to a whole waveform
  • Step S311 comparing the determined ratio with the proportional threshold
  • Step S312 determining that the frequency waveform is the optimal waveform when the determined ratio is less than or equal to the proportional threshold.
  • the optimal waveform is a waveform in which the ratio of the step waveform to the entire waveform is less than or equal to a preset ratio threshold.
  • the converted frequency waveform can be sent to the microprocessor through the photoelectric conversion receiver, and the microprocessor parses the frequency waveform by the signal waveform determining algorithm to determine the proportion of the step wave occupies the entire waveform in the frequency waveform;
  • the ratio is compared with the proportional threshold; determining that the frequency waveform is the optimal waveform when the determined ratio is less than or equal to the proportional threshold; determining that the determined ratio is greater than the proportional threshold
  • the frequency waveform is not the optimal waveform.
  • the heart rate detection is performed according to the optimal brightness of the emitted light signal, so that when the photoelectric reflection detects the heart rate, the emission is performed.
  • the optical signal can adapt to the physical condition of the person to be detected, so that the amplitude of the detected frequency waveform is obvious and excessively smooth, and the accuracy of the heart rate detection is improved.
  • FIG. 6 is a schematic flow chart of a fourth embodiment of a photoelectric reflection heart rate detecting method according to the present invention. Based on the second embodiment of the photoelectric reflection heart rate detecting method, the step S13 includes:
  • Step S320 analyzing the frequency waveform to determine the length of the longest step wave in the frequency waveform
  • Step S321 comparing the determined length with the length threshold
  • Step S322 determining that the frequency waveform is the optimal waveform when the determined length is less than or equal to the length threshold.
  • the optimal waveform is a waveform in which the length of the longest staircase wave is less than or equal to a preset length threshold.
  • the converted frequency waveform can be sent to the microprocessor through the photoelectric conversion receiver, and the microprocessor parses the frequency waveform by a signal waveform determination algorithm to determine the length of the longest step wave in the frequency waveform; the determined length Aligning with the length threshold; determining that the frequency waveform is the optimal waveform when the determined length is less than or equal to the length threshold; determining that the determined length is greater than the length threshold
  • the frequency waveform is not the best waveform.
  • the length of the longest step wave in the frequency waveform is determined, the optimal waveform is determined, and then the optimal brightness is determined, and the heart rate is detected according to the optimal brightness, and the emitted light signal is detected when the photoelectric reflection detects the heart rate.
  • the physical condition of the person to be detected can be adapted, so that the amplitude of the detected frequency waveform is obvious and excessively smooth, and the accuracy of heart rate detection is improved.
  • the execution bodies of the photoelectric reflection heart rate detecting methods of the above-described first to fourth embodiments may each be a heart rate detecting device or a photoelectric reflection heart rate detector. Further, the photoelectric reflection heart rate detecting method can be implemented by a client detection program installed on a heart rate detecting device or a photoelectric reflection heart rate detector.
  • the invention further provides a photoelectric reflection heart rate detecting device.
  • FIG. 7 is a schematic diagram of functional modules of a first embodiment of a photoelectric reflection heart rate detecting device of the present invention.
  • the photoelectric reflection heart rate detecting device includes: an adjustment module 10, a determination module 20, and a heart rate detection module 30.
  • the adjusting module 10 is configured to adjust the brightness of the LED light source according to a preset manner when receiving the heart rate detecting instruction, and detect a frequency waveform corresponding to each brightness;
  • the LED light source is used to emit an optical signal required for heart rate detection, and the LED light source can emit optical signals of different brightness under the control of a microprocessor.
  • the LED light source is a double green LED light source, and the double green LED light source is an LED light source with a 570 nm emission wavelength, and the measurement precision is higher.
  • the preset manner may be: controlling the LED light source to emit the first optical signal by decreasing the brightness by the maximum brightness, until the optimal waveform is detected or reduced to a preset minimum brightness; or the preset manner may also be And controlling the LED light source to emit the first optical signal by increasing the brightness by the minimum brightness until the optimal waveform is detected or increased to the maximum brightness of the LED light source.
  • the current data is outputted by the microprocessor to the current source chip, and the current source chip outputs a corresponding current to drive the LED light source to emit an optical signal required for heart rate detection.
  • the current source chip is preferably an adjustable current source chip, and the current output by the adjustable current source chip is controlled by a microprocessor to adjust the brightness of the optical signal emitted by the LED light source.
  • the determining module 20 is configured to: when the frequency waveform is detected as an optimal waveform, use the corresponding brightness as the optimal brightness;
  • the optimal waveform may be a waveform in which the ratio of the step waveform to the entire waveform is less than or equal to the preset ratio threshold; or the optimal waveform may be the length of the longest step wave being less than or equal to the preset length threshold. Or the optimal waveform may be a waveform in which the ratio of the staircase waveform to the entire waveform is less than or equal to the preset ratio threshold, and the length of the longest staircase wave is less than or equal to the preset length threshold.
  • FIG. 2 is a schematic diagram of a sawtooth waveform of a non-optimal waveform in the present invention
  • FIG. 3 is a schematic diagram of an optimum waveform in the present invention.
  • the corresponding brightness is taken as the optimal brightness, and the current value of the corresponding LED light source is recorded, and the adjustable current source chip is controlled to the constant current value.
  • the LED light source is driven to emit an optical signal for heart rate detection.
  • the heart rate detecting module 30 is configured to control the LED light source to emit an optical signal according to the optimal brightness, and perform heart rate detection.
  • the LED light source can be controlled by the microprocessor to emit a constant brightness optical signal according to the optimal brightness for heart rate detection. Performing a process of photoelectric reflection heart rate detection, preferably, by controlling the LED light source to emit a constant brightness optical signal according to the optimal brightness, and completing the heart rate by the photoelectric conversion principle and the counting measurement principle of the microprocessor Detection.
  • the heart rate detecting module 30 is further configured to: when detecting that all the frequency waveforms corresponding to the respective brightnesses are not optimal waveforms, control the LED light source to emit an optical signal according to the preset brightness, and perform heart rate detection.
  • the preset brightness is a preset default LED light source brightness when the optimal brightness is not detected.
  • the optical signal is emitted according to the preset brightness.
  • the LED light source may be controlled to continuously emit the first light signal by decreasing the brightness by the maximum brightness until decreasing to a preset minimum brightness, and the LED light source is lowered to the minimum brightness.
  • the LED light source is controlled to perform heart rate detection according to the minimum brightness.
  • the brightness when the optimal waveform is detected is taken as the optimal brightness, and the heart rate detection is performed according to the optimal brightness emission optical signal, so that the photoelectric reflection detection is performed.
  • the emitted light signal can adapt to the physical condition of the person to be detected, so that the detected frequency waveform amplitude is obviously and excessively smooth, and the accuracy of heart rate detection is improved.
  • FIG. 8 is a schematic diagram of functional modules of a second embodiment of the photoelectric reflection heart rate detecting device of the present invention.
  • the adjustment module 10 includes a control unit 11, a conversion unit 12, and a determination unit 13 based on the first embodiment of the above-described photoelectric reflection heart rate detecting device;
  • the control unit 11 is configured to, when receiving the heart rate detection command, control the LED light source to emit the first optical signal by decreasing the brightness by the maximum brightness;
  • the heart rate detection instruction may trigger the heart rate detection instruction by using the physical button for performing heart rate detection; or, by providing a shortcut icon for heart rate detection, detecting that the user is based on the The heart rate detection command triggered by the shortcut icon; or a touch button for heart rate detection may be provided, and the heart rate detection command is triggered when a touch operation by the user based on the touch button is detected.
  • the first optical signal is a light signal with a constant brightness emitted by the LED light source to the human body, for detecting a second optical signal reflected by the human body, and determining a corresponding frequency waveform according to the light intensity of the second optical signal,
  • the change of the two light signals is synchronized with the changes of the human blood, and is further synchronized with the change of the heart rate of the human body.
  • the adjustable current source chip may be controlled by the microprocessor to output a saturation current of the LED light source to drive the LED light source to emit a first optical signal according to a maximum brightness, and detect a corresponding frequency waveform when the maximum brightness is generated; if the frequency waveform If it is not the optimal waveform, the microprocessor can control the adjustable current source chip to lower the first-level (preferably, 5 mA is one-stage) driving current to reduce the brightness of the LED light source to emit the first optical signal, and detect the corresponding frequency. Waveform; if the frequency waveform is not the optimal waveform, the microprocessor can control the adjustable current source chip to reduce the first-level driving current again to further reduce the brightness of the LED light source to emit the first optical signal, and detect the corresponding frequency waveform.
  • the microprocessor can control the adjustable current source chip to reduce the first-level driving current again to further reduce the brightness of the LED light source to emit the first optical signal, and detect the corresponding frequency waveform.
  • the above steps are repeated until the LED light source is lowered to a preset minimum brightness.
  • the minimum brightness is the brightness of the LED light source corresponding to the preset lower limit current, so that when the LED light source is lowered to the minimum brightness, if the optimal waveform is not detected, the heart rate detection is performed according to the default brightness.
  • the converting unit 12 is configured to receive a second optical signal that is reflected by the first optical signal, and convert a second optical signal corresponding to each brightness into a corresponding frequency waveform;
  • the second optical signal reflected by the first optical signal is received by the optical frequency receiving converter, and the second optical signal corresponding to each brightness is converted into a corresponding frequency waveform by the optical frequency receiving converter.
  • the determining unit 13 is configured to determine whether the frequency waveform corresponding to each brightness is an optimal waveform.
  • the converted frequency waveform can be sent to the microprocessor through the optical frequency conversion receiver, and the microprocessor determines whether the frequency waveform corresponding to each brightness is the optimal waveform through the signal waveform judgment algorithm.
  • the frequency waveform corresponding to each brightness may be determined whether there is a sawtooth wave or a smooth wave to determine whether the frequency waveform is an optimal waveform. When there is no sawtooth wave or smooth wave in the frequency waveform, the frequency waveform is determined to be The best waveform.
  • the brightness when the optimal waveform is detected is taken as the optimal brightness, and the heart rate detection is performed according to the optimal brightness emission optical signal, so that the photoelectric reflection detection is performed.
  • the emitted light signal can adapt to the physical condition of the person to be detected, so that the detected frequency waveform amplitude is obviously and excessively smooth, and the accuracy of heart rate detection is improved.
  • FIG. 9 is a schematic diagram of functional modules of a third embodiment of the photoelectric reflection heart rate detecting device of the present invention.
  • the determining unit 13 includes a first parsing subunit 130, a first comparing subunit 131, and a first determining subunit 132, based on the second embodiment of the photoelectric reflection heart rate detecting apparatus;
  • the first parsing sub-unit 130 is configured to parse the frequency waveform, and determine a ratio of a step wave in the frequency waveform to a whole waveform;
  • the first comparison sub-unit 131 is configured to compare the determined ratio with the proportional threshold
  • the first determining subunit 132 is configured to determine that the frequency waveform is the optimal waveform when the determined ratio is less than or equal to the proportional threshold.
  • the optimal waveform is a waveform in which the ratio of the step waveform to the entire waveform is less than or equal to a preset ratio threshold.
  • the converted frequency waveform can be sent to the microprocessor through the photoelectric conversion receiver, and the microprocessor parses the frequency waveform by the signal waveform determining algorithm to determine the proportion of the step wave occupies the entire waveform in the frequency waveform;
  • the ratio is compared with the proportional threshold; determining that the frequency waveform is the optimal waveform when the determined ratio is less than or equal to the proportional threshold; determining that the determined ratio is greater than the proportional threshold
  • the frequency waveform is not the optimal waveform.
  • the heart rate detection is performed according to the optimal brightness of the emitted light signal, so that when the photoelectric reflection detects the heart rate, the emission is performed.
  • the optical signal can adapt to the physical condition of the person to be detected, so that the amplitude of the detected frequency waveform is obvious and excessively smooth, and the accuracy of the heart rate detection is improved.
  • FIG. 10 is a schematic diagram of functional modules of a fourth embodiment of the photoelectric reflection heart rate detecting device of the present invention.
  • the determining unit includes a second parsing subunit 133, a second collating subunit 134, and a second determining subunit 135, based on the second embodiment of the photoelectric reflection heart rate detecting apparatus;
  • the second parsing sub-unit 133 is configured to parse the frequency waveform, and determine a length of a longest step wave in the frequency waveform;
  • the second comparison subunit 134 is configured to compare the determined length with the length threshold
  • the second determining sub-unit 135 is configured to determine that the frequency waveform is the optimal waveform when the determined length is less than or equal to the length threshold.
  • the optimal waveform is a waveform in which the length of the longest staircase wave is less than or equal to a preset length threshold.
  • the converted frequency waveform can be sent to the microprocessor through the photoelectric conversion receiver, and the microprocessor parses the frequency waveform by a signal waveform determination algorithm to determine the length of the longest step wave in the frequency waveform; the determined length Aligning with the length threshold; determining that the frequency waveform is the optimal waveform when the determined length is less than or equal to the length threshold; determining that the determined length is greater than the length threshold
  • the frequency waveform is not the best waveform.
  • the length of the longest step wave in the frequency waveform is determined, the optimal waveform is determined, and then the optimal brightness is determined, and the heart rate is detected according to the optimal brightness, and the emitted light signal is detected when the photoelectric reflection detects the heart rate.
  • the physical condition of the person to be detected can be adapted, so that the amplitude of the detected frequency waveform is obvious and excessively smooth, and the accuracy of heart rate detection is improved.
  • the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better.
  • Implementation Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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Abstract

一种光电反射心率检测方法及心率检测装置，其中该光电反射心率检测方法包括以下步骤：在接收到心率检测指令时，按照预设方式调整LED光源的亮度、并检测各亮度对应的频率波形（S10）；在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度（S20）；控制该LED光源按照该最佳亮度发射光信号，并进行心率检测（S30）。按照该最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测的人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。

Description

光电反射心率检测方法及装置
技术领域
本发明涉及心率检测领域，尤其涉及一种光电反射心率检测方法及装置。
背景技术
在恒定波长的光源照射下，向人体发射的光一部分会被人体吸收，其余部分会由血液漫反射返回，人体血液会随着心脏的跳动而发生变化，同时也会引起血液反射返回的光线的变化。光电反射心率检测，主要通过检测人体血液反射返回的光线的变化间接检测到人体的心率信号。
在光电反射心率检测过程中，发射的光信号通过人体反射得到的心率信号很微弱，同时，由于每个人的肤色、胖瘦等体质条件不同，所需的光信号的亮度不一样。传统的光电反射心率检测过程中，发射的光信号的亮度是固定的，由此造成了由于人体肤色、胖瘦等体质条件不同，检测到的心率信号不稳定，测量成功率低。尤其在亮度不合适时，心率信号几乎检测不到。因此，现有的光电反射心率检测过程中，由于发射的光信号的亮度不合适待检测人的体质条件，所造成的心率检测准确度低的问题，此方面的问题亟待发明人解决。
上述内容仅用于辅助理解本发明的技术方案，并不代表承认上述内容是现有技术。
发明内容
本发明的主要目的在于解决现有的光电反射心率检测过程中，由于发射的光信号的亮度不合适待检测人的体质条件，所造成的心率检测准确度低的问题。
为实现上述目的，本发明提供一种光电反射心率检测方法，所述光电反射心率检测方法包括以下步骤：
在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形；
在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度；
控制所述LED光源按照所述最佳亮度发射光信号，并进行心率检测。
优选的，所述在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形的步骤之后，还包括：
在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
优选的，所述在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形的步骤包括：
在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号；
接收基于所述第一光信号反射的第二光信号，将各亮度对应的第二光信号转换为对应的频率波形；
判断各亮度对应的频率波形是否为最佳波形。
优选的，所述最佳波形，为阶梯波形占整段波形的比例小于或等于预设比例阈值的波形；
所述判断各亮度对应的频率波形是否为最佳波形的步骤包括：
解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；
将所确定的比例与所述比例阈值进行比对；
在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形。
优选的，所述最佳波形，为最长阶梯波的长度小于或等于预设长度阈值的波形；
所述判断各亮度对应的频率波形是否为最佳波形的步骤包括：
解析所述频率波形，确定所述频率波形中最长阶梯波的长度；
将所确定的长度与所述长度阈值进行比对；
在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
优选的，所述判断各亮度对应的频率波形是否为最佳波形的步骤包括：
判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值；
在所述频率波形中的阶梯波占整段波形的比例小于或等于预设的比例阈值时，判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值；
在所述频率波形中最长阶梯波的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
优选的，所述预设方式为，控制所述LED光源由最低亮度逐次增加亮度发射第一光信号，直到检测到最佳波形或增加至所述LED光源的最大亮度。
此外，为实现上述目的，本发明还提供一种光电反射心率检测装置，所述光电反射心率检测装置包括：
调整模块，用于在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形；
确定模块，用于在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度；
心率检测模块，用于控制所述LED光源按照所述最佳亮度发射光信号，并进行心率检测。
优选的，所述心率检测模块，还用于在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
优选的，所述调整模块包括控制单元、转换单元及判断单元；
所述控制单元，用于在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号；
所述转换单元，用于接收基于所述第一光信号反射的第二光信号，将各亮度对应的第二光信号转换为对应的频率波形；
所述判断单元，用于判断各亮度对应的频率波形是否为最佳波形。
优选的，所述判断单元包括第一解析子单元、第一比对子单元及第一确定子单元；
所述第一解析子单元，用于解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；
所述第一比对子单元，用于将所确定的比例与所述比例阈值进行比对；
所述第一确定子单元，用于在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形。
优选的，所述判断单元包括第二解析子单元、第二比对子单元及第二确定子单元；
所述第二解析子单元，用于解析所述频率波形，确定所述频率波形中最长阶梯波的长度；
所述第二比对子单元，用于将所确定的长度与所述长度阈值进行比对；
所述第二确定子单元，用于在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
优选的，所述判断单元，还用于判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值；
所述判断单元，还用于在所述频率波形中的阶梯波占整段波形的比例小于或等于预设的比例阈值时，判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值；
所述判断单元，还用于在所述频率波形中最长阶梯波的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
优选的，所述预设方式为，控制所述LED光源由最低亮度逐次增加亮度发射第一光信号，直到检测到最佳波形或增加至所述LED光源的最大亮度。
本发明通过调整LED光源的亮度，并检测各亮度对应的频率波形，将检测到最佳波形时的亮度作为最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
附图说明
图1为本发明光电反射心率检测方法的第一实施例的流程示意图；
图2为本发明非最佳波形的锯齿状波形的示意图；
图3为本发明最佳波形的示意图；
图4为本发明光电反射心率检测方法的第二实施例的流程示意图；
图5为本发明光电反射心率检测方法的第三实施例的流程示意图；
图6为本发明光电反射心率检测方法的第四实施例的流程示意图；
图7为本发明光电反射心率检测装置的第一实施例的功能模块示意图；
图8为本发明光电反射心率检测装置的第二实施例的功能模块示意图；
图9为本发明光电反射心率检测装置的第三实施例的功能模块示意图；
图10为本发明光电反射心率检测装置的第四实施例的功能模块示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明实施例的主要解决方案是：在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形；在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度；控制所述LED光源按照所述最佳亮度发射光信号，并进行心率检测。
现有的光电反射心率检测过程中，由于发射的光信号的亮度不合适待检测人的体质条件，所造成的心率检测准确度低的问题。
基于上述问题，本发明提供一种光电反射心率检测方法。
参照图1，图1为本发明光电反射心率检测方法的第一实施例的流程示意图。在本实施例中，所述光电反射心率检测方法包括以下步骤：
步骤S10，在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形；
所述LED光源用于发射心率检测所需的光信号，所述LED光源可以在微处理器的控制下发射不同亮度的光信号。优选的，所述LED光源为双绿光LED光源，所述双绿光LED光源为570nm发光波长的LED光源，测量精度更高。
所述预设方式可以是，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号，直到检测到最佳波形或降低至预设的最低亮度；或者，所述预设方式也可以是，控制所述LED光源由最低亮度逐次增加亮度发射第一光信号，直到检测到最佳波形或增加至所述LED光源的最大亮度。
优选的，可以通过微处理器输出电流数据至电流源芯片，由所述电流源芯片输出相应的电流驱动所述LED光源发射心率检测所需的光信号。所述电流源芯片优选为可调电流源芯片，通过微处理器控制所述可调电流源芯片输出的电流，进而调整所述LED光源发射的光信号的亮度。
步骤S20，在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度；
所述最佳波形，可以是阶梯波形占整段波形的比例小于或等于预设比例阈值的波形；或者，所述最佳波形，也可以是最长阶梯波的长度小于或等于预设长度阈值的波形；或者，所述最佳波形，也可以是阶梯波形占整段波形的比例小于或等于预设比例阈值，并且最长阶梯波的长度小于或等于预设长度阈值的波形。参照图2及图3，所述图2为本发明中非最佳波形的锯齿状波形的示意图，所述图3为本发明中最佳波形的示意图。
优选的，在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度，同时记录对应的LED光源的电流值，控制所述可调电流源芯片以所述恒定的电流值驱动所述LED光源发射光信号进行心率检测。
步骤S30，控制所述LED光源按照所述最佳亮度发射光信号，并进行心率检测。
可以通过微处理器控制所述LED光源按照所述最佳亮度发射出亮度恒定的光信号，以进行心率检测。进行光电反射心率检测的过程，优选的，可以通过控制所述LED光源按照所述最佳亮度发射出亮度恒定的光信号，并通过光电转换原理以及微处理器的计数测量原理完成对心率次数的检测。
进一步的，在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
所述预设亮度为预先设定的在检测不到最佳亮度时默认的LED光源亮度。以便在检测不到所述最佳亮度时，按照所述预设亮度发射光信号。优选的，也可以在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号，直到降低至预设的最低亮度，在所述LED光源降低至所述最低亮度时，若未检测到最佳波形，则控制所述LED光源按照所述最低亮度进行心率检测。
本实施例通过调整LED光源的亮度，并检测各亮度对应的频率波形，将检测到最佳波形时的亮度作为最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
参照图4，图4为本发明光电反射心率检测方法的第二实施例的流程示意图。基于上述光电反射心率检测方法的第一实施例，所述步骤S10包括：
步骤S11，在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号；
所述心率检测指令，可以通过提供用于进行心率检测的物理按键，通过所述物理按键触发所述心率检测指令；或者，也可以通过提供进行心率检测的快捷图标，侦测到用户基于所述快捷图标触发的心率检测指令；或者，也可以提供进行心率检测的触摸按键，在侦测到用户基于所述触摸按键的触摸操作时，触发所述心率检测指令。
所述第一光信号为LED光源向人体发射的亮度恒定的光信号，用以检测通过人体反射的第二光信号，根据所述第二光信号的光强确定对应的频率波形，所述第二光信号的变化与人体血液的变化同步，进一步与人体的心率变化同步。
可以通过微处理器控制可调电流源芯片输出所述LED光源的饱和电流，以驱动所述LED光源按照最大亮度发射第一光信号，并检测最大亮度时对应的频率波形；若所述频率波形不是最佳波形，则通过微处理器控制可调电流源芯片降低一级（优选的，5mA为一级）驱动电流，以降低所述LED光源的亮度发射第一光信号，并检测对应的频率波形；若所述频率波形不是最佳波形，则通过微处理器控制可调电流源芯片再次降低一级驱动电流，以进一步降低所述LED光源的亮度发射第一光信号，检测对应的频率波形；重复以上步骤，直到所述LED光源降低至预设的最低亮度。所述最低亮度为预设的下限电流对应的LED光源的亮度，以便在所述LED光源降低至所述最低亮度时，若检测不到最佳波形，则按默认亮度进行心率检测。
步骤S12，接收基于所述第一光信号反射的第二光信号，将各亮度对应的第二光信号转换为对应的频率波形；
优选的，可以通过光频接收转换器接收基于所述第一光信号反射的第二光信号，并通过所述光频接收转换器将各亮度对应的第二光信号转换为对应的频率波形。
步骤S13，判断各亮度对应的频率波形是否为最佳波形。
可以通过光频转换接收器将转换得到频率波形发送至微处理器，微处理器通过信号波形判断算法判断各亮度对应的频率波形是否为最佳波形。可以通过判断各亮度对应的频率波形是否存在锯齿波或平波，以确定所述频率波形是否为最佳波形，在所述频率波形中不存在锯齿波或平波时，确定所述频率波形为最佳波形。
优选的，可以通过判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值，以确定所述频率波形是否为最佳波形；或者，也可以通过判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值，以确定所述频率波形是否为最佳波形；或者，还可以通过判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值，在所述频率波形中的阶梯波占整段波形的比例小于或等于预设的比例阈值时，进一步判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值，在所述频率波形中最长阶梯波的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
本实施例通过调整LED光源的亮度，并检测各亮度对应的频率波形，将检测到最佳波形时的亮度作为最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
参照图5，图5为本发明光电反射心率检测方法的第三实施例的流程示意图。基于上述光电反射心率检测方法的第二实施例，所述步骤S13包括：
步骤S310，解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；
步骤S311，将所确定的比例与所述比例阈值进行比对；
步骤S312，在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形。
所述最佳波形，为阶梯波形占整段波形的比例小于或等于预设比例阈值的波形。可以通过光电转换接收器将转换得到的频率波形发送至微处理器，微处理器通过信号波形判断算法解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；将所确定的比例与所述比例阈值进行比对；在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形；在所确定的比例大于所述比例阈值时，确定所述频率波形不是所述最佳波形。
本实施例通过判断频率波形中的阶梯波占整段波形的比例，确定最佳波形，进而确定最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
参照图6，图6为本发明光电反射心率检测方法的第四实施例的流程示意图。基于上述光电反射心率检测方法的第二实施例，所述步骤S13包括：
步骤S320，解析所述频率波形，确定所述频率波形中最长阶梯波的长度；
步骤S321，将所确定的长度与所述长度阈值进行比对；
步骤S322，在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
所述最佳波形，为最长阶梯波的长度小于或等于预设长度阈值的波形。可以通过光电转换接收器将转换得到的频率波形发送至微处理器，微处理器通过信号波形判断算法解析所述频率波形，确定所述频率波形中最长阶梯波的长度；将所确定的长度与所述长度阈值进行比对；在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形；在所确定的长度大于所述长度阈值时，确定所述频率波形不是所述最佳波形。
本实施例判断频率波形中的最长阶梯波的长度，确定最佳波形，进而确定最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
上述第一至第四实施例的光电反射心率检测方法的执行主体均可以为心率检测设备或光电反射心率检测仪。更进一步地，所述光电反射心率检测方法可以由安装在心率检测设备或光电反射心率检测仪上的客户端检测程序实现。
本发明进一步提供一种光电反射心率检测装置。
参照图7，图7为本发明光电反射心率检测装置的第一实施例的功能模块示意图。在本实施例中，所述光电反射心率检测装置包括：调整模块10、确定模块20及心率检测模块30。
调整模块10，用于在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形；
所述LED光源用于发射心率检测所需的光信号，所述LED光源可以在微处理器的控制下发射不同亮度的光信号。优选的，所述LED光源为双绿光LED光源，所述双绿光LED光源为570nm发光波长的LED光源，测量精度更高。
所述预设方式可以是，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号，直到检测到最佳波形或降低至预设的最低亮度；或者，所述预设方式也可以是，控制所述LED光源由最低亮度逐次增加亮度发射第一光信号，直到检测到最佳波形或增加至所述LED光源的最大亮度。
优选的，可以通过微处理器输出电流数据至电流源芯片，由所述电流源芯片输出相应的电流驱动所述LED光源发射心率检测所需的光信号。所述电流源芯片优选为可调电流源芯片，通过微处理器控制所述可调电流源芯片输出的电流，进而调整所述LED光源发射的光信号的亮度。
确定模块20，用于在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度；
所述最佳波形，可以是阶梯波形占整段波形的比例小于或等于预设比例阈值的波形；或者，所述最佳波形，也可以是最长阶梯波的长度小于或等于预设长度阈值的波形；或者，所述最佳波形，也可以是阶梯波形占整段波形的比例小于或等于预设比例阈值，并且最长阶梯波的长度小于或等于预设长度阈值的波形。参照图2及图3，所述图2为本发明中非最佳波形的锯齿状波形的示意图，所述图3为本发明中最佳波形的示意图。
优选的，在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度，同时记录对应的LED光源的电流值，控制所述可调电流源芯片以所述恒定的电流值驱动所述LED光源发射光信号进行心率检测。
心率检测模块30，用于控制所述LED光源按照所述最佳亮度发射光信号，并进行心率检测。
可以通过微处理器控制所述LED光源按照所述最佳亮度发射出亮度恒定的光信号，以进行心率检测。进行光电反射心率检测的过程，优选的，可以通过控制所述LED光源按照所述最佳亮度发射出亮度恒定的光信号，并通过光电转换原理以及微处理器的计数测量原理完成对心率次数的检测。
进一步的，所述心率检测模块30，还用于在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
所述预设亮度为预先设定的在检测不到最佳亮度时默认的LED光源亮度。以便在检测不到所述最佳亮度时，按照所述预设亮度发射光信号。优选的，也可以在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号，直到降低至预设的最低亮度，在所述LED光源降低至所述最低亮度时，若未检测到最佳波形，则控制所述LED光源按照所述最低亮度进行心率检测。
本实施例通过调整LED光源的亮度，并检测各亮度对应的频率波形，将检测到最佳波形时的亮度作为最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
参照图8，图8为本发明光电反射心率检测装置的第二实施例的功能模块示意图。基于上述光电反射心率检测装置的第一实施例，所述调整模块10包括控制单元11、转换单元12及判断单元13；
所述控制单元11，用于在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号；
所述心率检测指令，可以通过提供用于进行心率检测的物理按键，通过所述物理按键触发所述心率检测指令；或者，也可以通过提供进行心率检测的快捷图标，侦测到用户基于所述快捷图标触发的心率检测指令；或者，也可以提供进行心率检测的触摸按键，在侦测到用户基于所述触摸按键的触摸操作时，触发所述心率检测指令。
所述第一光信号为LED光源向人体发射的亮度恒定的光信号，用以检测通过人体反射的第二光信号，根据所述第二光信号的光强确定对应的频率波形，所述第二光信号的变化与人体血液的变化同步，进一步与人体的心率变化同步。
可以通过微处理器控制可调电流源芯片输出所述LED光源的饱和电流，以驱动所述LED光源按照最大亮度发射第一光信号，并检测最大亮度时对应的频率波形；若所述频率波形不是最佳波形，则通过微处理器控制可调电流源芯片降低一级（优选的，5mA为一级）驱动电流，以降低所述LED光源的亮度发射第一光信号，并检测对应的频率波形；若所述频率波形不是最佳波形，则通过微处理器控制可调电流源芯片再次降低一级驱动电流，以进一步降低所述LED光源的亮度发射第一光信号，检测对应的频率波形；重复以上步骤，直到所述LED光源降低至预设的最低亮度。所述最低亮度为预设的下限电流对应的LED光源的亮度，以便在所述LED光源降低至所述最低亮度时，若检测不到最佳波形，则按默认亮度进行心率检测。
所述转换单元12，用于接收基于所述第一光信号反射的第二光信号，将各亮度对应的第二光信号转换为对应的频率波形；
优选的，可以通过光频接收转换器接收基于所述第一光信号反射的第二光信号，并通过所述光频接收转换器将各亮度对应的第二光信号转换为对应的频率波形。
所述判断单元13，用于判断各亮度对应的频率波形是否为最佳波形。
可以通过光频转换接收器将转换得到频率波形发送至微处理器，微处理器通过信号波形判断算法判断各亮度对应的频率波形是否为最佳波形。可以通过判断各亮度对应的频率波形是否存在锯齿波或平波，以确定所述频率波形是否为最佳波形，在所述频率波形中不存在锯齿波或平波时，确定所述频率波形为最佳波形。
优选的，可以通过判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值，以确定所述频率波形是否为最佳波形；或者，也可以通过判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值，以确定所述频率波形是否为最佳波形；或者，还可以通过判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值，在所述频率波形中的阶梯波占整段波形的比例小于或等于预设的比例阈值时，进一步判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值，在所述频率波形中最长阶梯波的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
本实施例通过调整LED光源的亮度，并检测各亮度对应的频率波形，将检测到最佳波形时的亮度作为最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
参照图9，图9为本发明光电反射心率检测装置的第三实施例的功能模块示意图。基于上述光电反射心率检测装置的第二实施例，所述判断单元13包括第一解析子单元130、第一比对子单元131及第一确定子单元132；
所述第一解析子单元130，用于解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；
所述第一比对子单元131，用于将所确定的比例与所述比例阈值进行比对；
所述第一确定子单元132，用于在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形。
所述最佳波形，为阶梯波形占整段波形的比例小于或等于预设比例阈值的波形。可以通过光电转换接收器将转换得到的频率波形发送至微处理器，微处理器通过信号波形判断算法解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；将所确定的比例与所述比例阈值进行比对；在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形；在所确定的比例大于所述比例阈值时，确定所述频率波形不是所述最佳波形。
本实施例通过判断频率波形中的阶梯波占整段波形的比例，确定最佳波形，进而确定最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
参照图10，图10为本发明光电反射心率检测装置的第四实施例的功能模块示意图。基于上述光电反射心率检测装置的第二实施例，所述判断单元包括第二解析子单元133、第二比对子单元134及第二确定子单元135；
所述第二解析子单元133，用于解析所述频率波形，确定所述频率波形中最长阶梯波的长度；
所述第二比对子单元134，用于将所确定的长度与所述长度阈值进行比对；
所述第二确定子单元135，用于在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
所述最佳波形，为最长阶梯波的长度小于或等于预设长度阈值的波形。可以通过光电转换接收器将转换得到的频率波形发送至微处理器，微处理器通过信号波形判断算法解析所述频率波形，确定所述频率波形中最长阶梯波的长度；将所确定的长度与所述长度阈值进行比对；在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形；在所确定的长度大于所述长度阈值时，确定所述频率波形不是所述最佳波形。
本实施例判断频率波形中的最长阶梯波的长度，确定最佳波形，进而确定最佳亮度，按照所述最佳亮度发射光信号进行心率检测，使得光电反射检测心率时，发射的光信号能够适配待检测人的体质条件，使得检测到的频率波形波幅明显且过度平滑，提高了心率检测的准确性。
需要说明的是，在本文中，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过程、方法、物品或者装置不仅包括那些要素，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过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质（如ROM/RAM、磁碟、光盘）中，包括若干指令用以使得一台终端设备（可以是手机，计算机，服务器，空调器，或者网络设备等）执行本发明各个实施例所述的方法。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种光电反射心率检测方法，其特征在于，所述光电反射心率检测方法包括以下步骤：
    在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形；
    在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度；
    控制所述LED光源按照所述最佳亮度发射光信号，并进行心率检测。
  2. 如权利要求1所述的光电反射心率检测方法，其特征在于，所述在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形的步骤之后，还包括：
    在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  3. 如权利要求1所述的光电反射心率检测方法，其特征在于，所述在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形的步骤包括：
    在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号；
    接收基于所述第一光信号反射的第二光信号，将各亮度对应的第二光信号转换为对应的频率波形；
    判断各亮度对应的频率波形是否为最佳波形。
  4. 如权利要求3所述的光电反射心率检测方法，其特征在于，所述在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形的步骤之后，还包括：
    在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  5. 如权利要求3所述的光电反射心率检测方法，其特征在于，所述最佳波形，为阶梯波形占整段波形的比例小于或等于预设比例阈值的波形；
    所述判断各亮度对应的频率波形是否为最佳波形的步骤包括：
    解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；
    将所确定的比例与所述比例阈值进行比对；
    在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形。
  6. 如权利要求5所述的光电反射心率检测方法，其特征在于，所述在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形的步骤之后，还包括：
    在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  7. 如权利要求3所述的光电反射心率检测方法，其特征在于，所述最佳波形，为最长阶梯波的长度小于或等于预设长度阈值的波形；
    所述判断各亮度对应的频率波形是否为最佳波形的步骤包括：
    解析所述频率波形，确定所述频率波形中最长阶梯波的长度；
    将所确定的长度与所述长度阈值进行比对；
    在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
  8. 如权利要求7所述的光电反射心率检测方法，其特征在于，所述在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形的步骤之后，还包括：
    在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  9. 如权利要求3所述的光电反射心率检测方法，其特征在于，所述判断各亮度对应的频率波形是否为最佳波形的步骤包括：
    判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值；
    在所述频率波形中的阶梯波占整段波形的比例小于或等于预设的比例阈值时，判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值；
    在所述频率波形中最长阶梯波的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
  10. 如权利要求1所述的光电反射心率检测方法，其特征在于，所述预设方式为，控制所述LED光源由最低亮度逐次增加亮度发射第一光信号，直到检测到最佳波形或增加至所述LED光源的最大亮度。
  11. 一种光电反射心率检测装置，其特征在于，所述光电反射心率检测装置包括：
    调整模块，用于在接收到心率检测指令时，按照预设方式调整LED光源的亮度，并检测各亮度对应的频率波形；
    确定模块，用于在检测到所述频率波形为最佳波形时，将对应的亮度作为最佳亮度；
    心率检测模块，用于控制所述LED光源按照所述最佳亮度发射光信号，并进行心率检测。
  12. 如权利要求11所述的光电反射心率检测装置，其特征在于，所述心率检测模块，还用于在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  13. 如权利要求11所述的光电反射心率检测装置，其特征在于，所述调整模块包括控制单元、转换单元及判断单元；
    所述控制单元，用于在接收到心率检测指令时，控制所述LED光源由最大亮度逐次降低亮度发射第一光信号；
    所述转换单元，用于接收基于所述第一光信号反射的第二光信号，将各亮度对应的第二光信号转换为对应的频率波形；
    所述判断单元，用于判断各亮度对应的频率波形是否为最佳波形。
  14. 如权利要求13所述的光电反射心率检测装置，其特征在于，所述心率检测模块，还用于在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  15. 如权利要求13所述的光电反射心率检测装置，其特征在于，所述判断单元包括第一解析子单元、第一比对子单元及第一确定子单元；
    所述第一解析子单元，用于解析所述频率波形，确定所述频率波形中阶梯波占整段波形的比例；
    所述第一比对子单元，用于将所确定的比例与所述比例阈值进行比对；
    所述第一确定子单元，用于在所确定的比例小于或等于所述比例阈值时，确定所述频率波形为所述最佳波形。
  16. 如权利要求15所述的光电反射心率检测装置，其特征在于，所述心率检测模块，还用于在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  17. 如权利要求13所述的光电反射心率检测装置，其特征在于，所述判断单元包括第二解析子单元、第二比对子单元及第二确定子单元；
    所述第二解析子单元，用于解析所述频率波形，确定所述频率波形中最长阶梯波的长度；
    所述第二比对子单元，用于将所确定的长度与所述长度阈值进行比对；
    所述第二确定子单元，用于在所确定的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
  18. 如权利要求17所述的光电反射心率检测装置，其特征在于，所述心率检测模块，还用于在检测到所述各亮度对应的频率波形全部不是最佳波形时，控制所述LED光源按照预设亮度发射光信号，并进行心率检测。
  19. 如权利要求13所述的光电反射心率检测装置，其特征在于，所述判断单元，还用于判断所述频率波形中阶梯波占整段波形的比例是否小于或等于预设的比例阈值；
    所述判断单元，还用于在所述频率波形中的阶梯波占整段波形的比例小于或等于预设的比例阈值时，判断所述频率波形中最长阶梯波的长度是否小于或等于预设的长度阈值；
    所述判断单元，还用于在所述频率波形中最长阶梯波的长度小于或等于所述长度阈值时，确定所述频率波形为所述最佳波形。
  20. 如权利要求10所述的光电反射心率检测装置，其特征在于，所述预设方式为，控制所述LED光源由最低亮度逐次增加亮度发射第一光信号，直到检测到最佳波形或增加至所述LED光源的最大亮度。
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