CN111329461A - Wearable device heart rate metering device and method based on external light source - Google Patents
Wearable device heart rate metering device and method based on external light source Download PDFInfo
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- A—HUMAN NECESSITIES
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- 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
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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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Abstract
The invention discloses a wearable device heart rate metering device and method based on an external light source, wherein the device comprises a signal generator, an adjustable light source, an optical fiber, a fixing ring and a monitoring module; the signal generator loads a signal on the adjustable light source, light emitted by the adjustable light source is focused and guided into the optical fiber, then the light is guided into the photosensitive sensor of the wearable device through the optical fiber, the change of the heart rate signal is simulated through the periodic change of the light intensity of the adjustable light source, and the wearable device can calculate a simulated heart rate value according to the measured light intensity; the corresponding standard heart rate value is calculated by the monitoring equipment. According to the method, the signal generator is loaded to the adjustable light source, regular heart rate signals are simulated to the wearable device, the oscilloscope is used for measuring the frequency of the light source, the standard heart rate value is obtained through conversion calculation, and the standard heart rate value and the heart rate display value of the wearable device are calculated to judge whether the heart rate indication value meets the requirements or not, so that the heart rate metering method of the wearable device is completed, and the problem of tracing of the wearable device is solved.
Description
Technical Field
The invention belongs to the technical field of wearable equipment, and particularly relates to a wearable equipment heart rate metering device and method based on an external light source.
Background
With the advent of more and more wearable devices, the smart wearable market is held to great promise. Compared with the market growth speed of the blowout type, the industry standard of wearable products is in serious shortage. However, no application standard specially aiming at the intelligent wearable equipment exists at present, and the intelligent wearable products are supervised by various countries according to related standards and specifications mainly from the fields of communication and medical appliances. When entering the U.S. market, electronic intelligent wearable devices generally apply for FCC authentication like smart watches, smart bracelets, smart glasses, and the like. In order to freely circulate in the European Union market, the consumer electronic intelligent wearable equipment needs to pass CE authentication and be attached with a 'CE' mark.
At present, no national or industrial standard related to intelligent wearing is published in China. In view of the requirements of safety and environmental protection, China restricts and prohibits toxic and harmful substances in electronic information products to adopt a 'catalog management' mode, and products entering the catalog are required to be subjected to 3C authentication. Because the field of the intelligent wearable equipment is relatively advanced, the national technical detection standard is not provided at home at present, and the wearable equipment industry is not classified into catalogues. But in most channel promotions, the product will still be required to be 3C certified.
Most wearable products on the market at present have the related functions of health and sports, and the heart rate is one of the main functions. The principle of heart rate monitoring is generally ppg (photoplethysmography), which is a principle in which a sensor in contact with the skin of a bracelet emits a beam of light that impinges on the skin and measures the reflected/transmitted light. When the user's heart beats, more blood flows through the user's wrist and the amount of green light absorbed is greater. In the beating interval of the heart, the blood flow is reduced, so that the absorption of green light is reduced, and the heartbeat can be determined. However, the disadvantage is that it consumes a lot of power and is also disturbed by ambient light. The function of smart bracelet or wrist-watch monitoring heart rate on the market at present has mostly adopted the photoelectricity transmission measurement method.
The accuracy of wearable equipment measurement is mainly detected by adopting manual evaluation and a wrist blood circulation simulation device in the prior art, but certain defects exist:
the manual evaluation is the main test method at present, and the manual evaluation is mainly carried out in a clinical medicine mode and has three main defects: firstly, measuring points can not be selected according to needs, and the number of the measured points is the number of the measured points; secondly, the value cannot be traced by taking the human body signal as a standard, and the measurement requirement cannot be met; thirdly, the heart rate measurement value is large in error by comparing through a human body, and the influence of individual human body difference factors cannot be eliminated.
The main drawbacks of the analog wrist device are: firstly, complex and expensive facilities such as pipelines, pumps, human wrist tissues and the like need to be constructed, and the price is high and complicated; secondly, the device is large and not easy to carry; thirdly, the heart rate tracing source is transmitted to the wrist tissue of the simulated human body through the rotation frequency of the pump, and the accuracy of the heart rate tracing source is influenced due to the pipeline, the pressure and other reasons.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art, provides a wearable device heart rate metering device based on an external light source, and solves the problem of magnitude traceability of the heart rate of the wearable device.
Another object of the present invention is to provide a metering method of a wearable device heart rate metering device based on an external light source.
In order to achieve the first purpose, the invention adopts the following technical scheme:
the wearable device heart rate metering device based on the external light source comprises a signal generator, an adjustable light source, an optical fiber, a fixing ring and a monitoring module, wherein the signal generator, the adjustable light source, the optical fiber and the monitoring module are sequentially connected, the fixing ring is used for placing the wearable device, the wearable device is connected to the monitoring module through the optical fiber, and the monitoring module is used for monitoring signals sent by the adjustable light source; the signal generator loads a signal on the adjustable light source, light emitted by the adjustable light source is focused and guided into the optical fiber, then the light is guided into the photosensitive sensor of the wearable device through the optical fiber, the change of the heart rate signal is simulated through the periodic change of the light intensity of the adjustable light source, and the wearable device can calculate a simulated heart rate value according to the measured light intensity; the corresponding standard heart rate value is calculated by the monitoring equipment.
As a preferred technical scheme, the monitoring module comprises an optical fiber coupler, a photoelectric conversion module and an oscilloscope, wherein the optical fiber coupler is connected with the adjustable light source through an optical fiber on one hand, and is conveniently connected with the wearable equipment fixed on the fixing ring through the optical fiber on the other hand; the optical fiber coupler is also connected with a photoelectric conversion module, the photoelectric conversion module is connected with an oscilloscope, and the optical path is led out and converted into an electric signal to be monitored on the oscilloscope.
Preferably, the fixing ring comprises a fiber channel leading to the photosensitive sensor of the wearable device, and the rest part is filled with a sealing material.
As a preferred technical scheme, the signal generator generates a square wave or sine wave signal to be loaded on the adjustable light source.
As a preferable technical solution, the optical fiber laser further comprises an optical fiber collimator arranged behind the adjustable light source, and light emitted by the adjustable light source is guided into the optical fiber through focusing of the optical fiber collimator.
As an optimal technical scheme, the waveform of the signal generator is adjusted, the simulated heart rate data and the standard heart rate value are compared and calculated through multiple tests to obtain an average value, the average value is compared with the standard value to obtain the heart rate error of the wearable equipment, and metering is completed.
In order to achieve the other purpose, the invention adopts the following technical scheme:
the metering method of the wearable equipment heart rate metering device based on the external light source comprises the following steps:
setting the wearable device in a heart rate detection state, fixing the wearable device on a fixing ring, aligning a bottom optical sensor with the position of an optical fiber channel, and connecting an optical fiber with the fixing ring;
the adjusting signal generator loads a square wave or sine wave signal on the adjustable light source to start a heart rate test;
the signal of the signal generator is changed for many times, the heart rate signal change is simulated through the periodic change of the light intensity of the adjustable light source, and the wearable equipment can calculate the simulated heart rate value according to the measured light intensity;
the monitoring module calculates a corresponding standard heart rate value according to the signal of the signal generator;
and judging whether the wearable equipment is qualified or not according to the errors of the standard heart rate value and the simulated heart rate value.
As a preferred technical scheme, the adjusting signal generator loads a square wave or sine wave signal on the adjustable light source to start a heart rate test, specifically comprising:
the signal generator loads a square wave or sine wave signal on the adjustable light source, light emitted by the adjustable light source is focused and guided into the optical fiber through the optical fiber collimator, the light is guided into a photosensitive sensor of the wearable device through the optical fiber, the heart rate signal changes are simulated through the periodic change of the light intensity of the adjustable light source, and the wearable device can calculate a simulated heart rate value according to the measured light intensity.
As a preferred technical solution, the monitoring module calculates a corresponding standard heart rate value according to a signal of the signal generator, specifically:
the signal generator is externally connected with an oscilloscope to observe and monitor the output signal in real time, the oscilloscope monitors the standard waveform data to display the signal period, and the corresponding standard heart rate value is calculated.
As a preferred technical solution, the determining whether the wearable device is qualified according to the error between the standard heart rate value and the simulated heart rate value specifically includes:
the waveform of the signal generator is adjusted, the simulation heart rate value and the standard heart rate value are compared and calculated for multiple times to obtain an average value, the average value is compared with a standard value, the heart rate error of the wearable equipment can be obtained, and metering is completed.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) according to the method, the signal generator is loaded to the adjustable light source, regular heart rate signals are simulated to be sent to the wearable device, the oscilloscope is used for measuring the frequency of the light source, the standard heart rate value is obtained through conversion calculation, and the standard heart rate value and the heart rate display value (simulated heart rate value) of the wearable device are calculated to judge whether the heart rate indication value meets the requirements or not, so that the method for metering the heart rate of the wearable device is completed, and the problem of tracing the wearable device is solved.
(2) The invention increases the monitoring of the standard signal through the oscilloscope, ensures the standard value to be real and reliable, and leads the standard value to be capable of effectively tracing the source.
(3) The method avoids the heart rate comparison by using a clinical medicine method, is simple and easy to operate, can measure the equipment by connecting the wearable equipment with the calibrator, does not need a human body as an experimental object, and can trace the magnitude of the measurement characteristic of the heart rate of the wearable equipment.
(4) The method can accurately calculate the heart rate value of the wearable device, greatly reduce errors and has strong reliability.
Drawings
FIG. 1 is a schematic structural diagram of a wearable device heart rate metering device of the present invention;
fig. 2 is a flow chart of a metering method of the wearable device heart rate metering device of the invention.
The reference numbers illustrate: 1-a signal generator; 2-a tunable light source; 3-an optical fiber; 4-a fiber collimator; 5-fixing the ring; 6-a wearable device; 7-a photosensitive sensor; 8-a fiber channel; 9-a fiber coupler; 10-a photoelectric conversion module; 11-oscilloscope.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Examples
As shown in fig. 1, the wearable device heart rate metering device based on an external light source in this embodiment includes a signal generator 1, an adjustable light source 2, an optical fiber 3, a fixing ring 5 and a monitoring module, where the monitoring module includes an optical fiber coupler 9, a photoelectric conversion module 10 and an oscilloscope 11, the signal generator 1, the adjustable light source 2, the optical fiber 3, the optical fiber coupler, the photoelectric conversion module and the oscilloscope are sequentially connected, the fixing ring 5 is used for placing a wearable device 6, the wearable device is connected to the monitoring module through the optical fiber 3 by the wearable device 6, and the monitoring module is used for monitoring a signal sent by the adjustable light source; when metering is carried out, a signal is loaded on the adjustable light source 2 by the signal generator 1, light emitted by the adjustable light source 2 is focused and guided into the optical fiber 3, then the light is guided into the photosensitive sensor 7 of the wearable device 6 through the optical fiber 3, the change of a heart rate signal is simulated through the periodic change of the light intensity of the adjustable light source 2, and the wearable device 6 can calculate a simulated heart rate value according to the measured light intensity; the corresponding standard heart rate value is calculated by the monitoring equipment. And calculating to obtain whether the wearable equipment meets the requirements or not by comparing the simulated heart rate value with the standard heart rate value.
In one embodiment of the invention, the monitoring module comprises an optical fiber coupler 9, a photoelectric conversion module 10 and an oscilloscope 11, wherein the optical fiber coupler 9 is connected with the adjustable light source 2 through an optical fiber 3 on one hand, and is conveniently connected with the wearable device 6 fixed on the fixing ring through the optical fiber 3 on the other hand; in addition, the optical fiber coupler 9 is further connected to a photoelectric conversion module 10, and the photoelectric conversion module 10 is connected to an oscilloscope 11, and is configured to monitor the optical path by extracting and converting the optical path into an electrical signal on the oscilloscope. The oscilloscope 11 utilizing the monitoring module can obtain a standard heart rate value, and the standard heart rate value can be accurately measured by adjusting the light signal of the adjustable light source for multiple times. The monitoring module is used for monitoring the electric signal led out and converted from the light path on the oscilloscope, so that the standard signal can be effectively traced to the source, and the standard value is ensured to be real and reliable.
Further, the fixing ring 6 provides a wearable device fixing function, wherein a fiber channel 8 is included according to the size of the device to lead to the photosensitive sensor 7 of the wearable device, and a fiber can be inserted by the fiber channel 8 to guide a light beam; the remaining portion of the interior of the fixing ring 5 is filled with sealing foam to prevent external light from entering, thereby reducing signal interference generated from an external light source.
In order to ensure that the obtained optical signals are more concentrated, the device further comprises an optical fiber collimator 4 arranged behind the adjustable light source 1, light emitted by the adjustable light source 2 is focused by the optical fiber collimator 4 and guided into an optical fiber, and finally the light is guided into a photosensitive sensor 7 of the wearable device 6 through the optical fiber; meanwhile, the signal generator is externally connected with an oscilloscope 11 for carrying out real-time observation and monitoring on output signals of the oscilloscope.
In order to obtain a more accurate heart rate standard value, the waveform of the signal generator 1 is adjusted, the simulated heart rate value and the standard heart rate value are compared and calculated for multiple times to obtain an average value, the average value is compared with the standard value to obtain the heart rate error of the wearable device, and the measurement is completed.
As shown in fig. 2, another embodiment of the present invention further provides a metering method of a wearable device heart rate metering device based on an external light source, including the following steps:
s101, setting the wearable device to be in a heart rate detection state, fixing the wearable device on a fixing ring, aligning a bottom optical sensor to the position of an optical fiber channel, and connecting an optical fiber with the fixing ring, wherein an initial set heart rate value is equal to the frequency of a signal generator;
s102, an adjusting signal generator loads a square wave or sine wave signal on an adjustable light source to start a heart rate test;
s103, changing signals of the signal generator for multiple times, simulating the change of the heart rate signals through the periodic change of the light intensity of the adjustable light source, and calculating the simulated heart rate value by the wearable equipment according to the measured light intensity; the method specifically comprises the following steps:
loading a square wave or sine wave signal on the adjustable light source through the signal generator, leading light emitted by the adjustable light source into the optical fiber through the focusing of the optical fiber collimator, finally leading the light into a photosensitive sensor of the wearable device through the optical fiber, simulating the change of a heart rate signal through the periodic change of the light intensity of the adjustable light source, and calculating the simulated heart rate value by the wearable device according to the measured light intensity;
s104, the monitoring module calculates a corresponding standard heart rate value according to the signal of the signal generator; the method specifically comprises the following steps:
the signal generator is externally connected with an oscilloscope to observe and monitor the output signal in real time, the oscilloscope monitors the standard waveform data to display the signal period, and the corresponding standard heart rate value is calculated.
And S105, judging whether the wearable equipment is qualified or not according to the error between the standard heart rate value and the simulated heart rate value.
The method comprises the following steps of judging whether the wearable equipment is qualified or not according to errors of the standard heart rate value and the simulated heart rate value, and specifically comprises the following steps:
the waveform of the signal generator is adjusted, the simulation heart rate value and the standard heart rate value are compared and calculated for multiple times to obtain an average value, the average value is compared with a standard value, the heart rate error of the wearable equipment can be obtained, and metering is completed.
The heart rate indication error is the wearable device display value-standard heart rate value;
wherein the standard heart rate value is the oscilloscope display frequency value.
According to the method, the signal generator is loaded to the adjustable light source, regular heart rate signals are simulated to be sent to the wearable device, the oscilloscope is used for measuring the frequency of the light source, the standard heart rate value is obtained through conversion calculation, and the standard heart rate value and the heart rate display value (namely the simulated heart rate value) of the wearable device are calculated to judge whether the heart rate indication value meets the requirements or not, so that the method for metering the heart rate of the wearable device is completed, and the problem of tracing the wearable device is solved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The heart rate metering device of the wearable equipment based on the external light source is characterized by comprising a signal generator, an adjustable light source, an optical fiber, a fixing ring and a monitoring module, wherein the signal generator, the adjustable light source, the optical fiber and the monitoring module are sequentially connected, the fixing ring is used for placing the wearable equipment, the wearable equipment is connected to the monitoring module through the optical fiber, and the monitoring module is used for monitoring signals sent by the adjustable light source; the signal generator loads a signal on the adjustable light source, light emitted by the adjustable light source is focused and guided into the optical fiber, then the light is guided into the photosensitive sensor of the wearable device through the optical fiber, the change of the heart rate signal is simulated through the periodic change of the light intensity of the adjustable light source, and the wearable device can calculate a simulated heart rate value according to the measured light intensity; the corresponding standard heart rate value is calculated by the monitoring equipment.
2. The wearable device heart rate metering device based on the external light source of claim 1, wherein the monitoring module comprises an optical fiber coupler, a photoelectric conversion module and an oscilloscope, the optical fiber coupler is connected with the adjustable light source through an optical fiber on one hand, and is conveniently connected with the wearable device fixed on the fixing ring through the optical fiber on the other hand; the optical fiber coupler is also connected with a photoelectric conversion module, the photoelectric conversion module is connected with an oscilloscope, and the optical path is led out and converted into an electric signal to be monitored on the oscilloscope.
3. The wearable device heart rate measurement apparatus based on an external light source of claim 1, wherein the fixation ring comprises a fiber channel leading to a wearable device light sensor, and the rest is filled with a sealing material.
4. The wearable device heart rate measurement device based on optical path interruption of claim 1, wherein the signal generator generates a square wave or sine wave signal to be loaded on the adjustable light source.
5. The wearable device heart rate metering device based on optical path interruption of claim 2, further comprising an optical fiber collimator arranged behind the adjustable light source, wherein light emitted by the adjustable light source is focused by the optical fiber collimator and guided into the optical fiber.
6. The wearable device heart rate metering device based on optical path interruption of claim 1, wherein the signal generator waveform is adjusted, the simulated heart rate data and the standard heart rate value are calculated through multiple test comparisons to obtain an average value, the average value is compared with the standard value to obtain the heart rate error of the wearable device, and metering is completed.
7. The metering method of the wearable device heart rate metering device based on the external light source according to any one of claims 1-6, characterized by comprising the following steps:
setting the wearable device in a heart rate detection state, fixing the wearable device on a fixing ring, aligning a bottom optical sensor with the position of an optical fiber channel, and connecting an optical fiber with the fixing ring;
the adjusting signal generator loads a square wave or sine wave signal on the adjustable light source to start a heart rate test;
the signal of the signal generator is changed for many times, the heart rate signal change is simulated through the periodic change of the light intensity of the adjustable light source, and the wearable equipment can calculate the simulated heart rate value according to the measured light intensity;
the monitoring module calculates a corresponding standard heart rate value according to the signal of the signal generator;
and judging whether the wearable equipment is qualified or not according to the errors of the standard heart rate value and the simulated heart rate value.
8. The metering method of the wearable device heart rate metering device based on the external light source as claimed in claim 7, wherein the adjusting signal generator loads a square wave or sine wave signal on the adjustable light source to start a heart rate test, specifically:
the signal generator loads a square wave or sine wave signal on the adjustable light source, light emitted by the adjustable light source is focused and guided into the optical fiber through the optical fiber collimator, the light is guided into a photosensitive sensor of the wearable device through the optical fiber, the heart rate signal changes are simulated through the periodic change of the light intensity of the adjustable light source, and the wearable device can calculate a simulated heart rate value according to the measured light intensity.
9. The metering method of the wearable device heart rate metering device based on the external light source as claimed in claim 7, wherein the monitoring module calculates a corresponding standard heart rate value according to the signal of the signal generator, specifically:
the signal generator is externally connected with an oscilloscope to observe and monitor the output signal in real time, the oscilloscope monitors the standard waveform data to display the signal period, and the corresponding standard heart rate value is calculated.
10. The metering method of the wearable device heart rate metering device based on the external light source as claimed in claim 7, wherein the determining whether the wearable device is qualified according to the error between the standard heart rate value and the simulated heart rate value is specifically:
the waveform of the signal generator is adjusted, the simulation heart rate value and the standard heart rate value are compared and calculated for multiple times to obtain an average value, the average value is compared with a standard value, the heart rate error of the wearable equipment can be obtained, and metering is completed.
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