Flexible multi-physiological parameter measurement optoelectronic device

Abstract

The present application relates to physiological monitoring technical field, especially to a kind of flexible multi-physiological parameter measurement photoelectric device, comprising: flexible shell;Signal acquisition module is arranged in the inside of the flexible shell, to collect physiological parameter and transmit to processing position;Signal processing module is connected with the acquisition module, including to be used to the physiological signal is amplified amplifier, and the filter connected with the amplifier to be used to the physiological signal is filtered filter and the analog-digital converter connected with the filter to be used to the physiological signal is converted into digital signal;Control module is connected with the signal acquisition module and the signal processing module respectively, to determine the modulation frequency of physiological signal according to the signal-to-noise ratio between physiological signal and thermal noise, or, according to the distortion degree of physiological signal, the response time of photoelectric sensor is determined.The present application improves the measurement accuracy of photoelectric device.

Description

Technical Field

[0001] The present invention relates to the technical field of physiological monitoring, and in particular to a flexible multi-physiological parameter measurement photoelectric device. Background Art

[0002] With the rapid development of wearable device technology, people's demand for health monitoring is growing, shifting from single-parameter monitoring to comprehensive monitoring of multiple physiological parameters. Traditional rigid medical monitoring devices, while offering a certain degree of accuracy, are limited in comfort and portability, making them inadequate for real-time, long-term monitoring during daily activities. The rise of flexible electronics offers new opportunities to address this challenge.

[0003] In the field of health monitoring, comprehensive analysis of multiple physiological parameters is crucial for disease prevention, diagnosis, and health management. For example, continuous monitoring of parameters such as electrocardiogram (ECG), body temperature, and blood pressure can provide comprehensive health data for patients with chronic conditions such as cardiovascular disease and diabetes, helping doctors to promptly detect changes in their condition and adjust treatment plans. However, achieving accurate, stable, and comfortable multi-physiological parameter monitoring faces numerous challenges.

[0004] Chinese Patent Publication No.: CN106264475A discloses a method and device for monitoring multiple physiological parameters of sleep respiration using a single photoelectric sensor. The method comprises the following steps: Step 1, collecting a photoelectric volume pulse wave with a sampling rate of more than 500 Hz in an analog or digital manner; the photoelectric volume pulse wave includes respiratory information and an unfiltered raw photoelectric volume pulse wave signal, and the raw photoelectric volume pulse wave signal includes red light and infrared light that pass through the tissue under test in a reflected or transmitted manner; Step 2, preprocessing the collected photoelectric volume pulse wave, including extraction and detection of a baseline, extraction and detection of peak points and valley points; Step 3, preprocessing the collected photoelectric volume pulse wave according to the detected information. The peak point, valley point and baseline change information measured are used to determine whether the current measurement moment is in motion; when the peak point, valley point and baseline change amplitude exceed the set threshold, it is considered that the current moment is in motion, and the current measurement value will be discarded and re-measured until the current measurement value leaves the motion state and enters the normal photoplethysmography range, and the identified non-motion state data is regarded as a normal photoplethysmography; step 4, when it is detected that the current moment is in motion, the number of body movements is counted; according to the extracted motion state information, the detected motion state information is recorded as body movement plus 1 after the current motion stops, and is accumulated to the body movement count value. It can be seen from this that the single photoelectric sensor sleep breathing multi-physiological parameter monitoring method and device has the problem that due to the thermal motion of electrons in electronic components such as resistors and transistors in the photoelectric device, thermal noise is generated, which interferes with the measurement of weak physiological signals, thereby causing the measurement accuracy of the photoelectric device to decrease. Summary of the Invention

[0005] To this end, the present invention provides a flexible multi-physiological parameter measurement optoelectronic device to overcome the problem in the prior art that due to the thermal motion of electrons in electronic components such as resistors and transistors in the optoelectronic device, thermal noise is generated, which interferes with the measurement of weak physiological signals and thus causes a decrease in the measurement accuracy of the optoelectronic device.

[0006] To achieve the above-mentioned objectives, the present invention provides a flexible multi-physiological parameter measurement optoelectronic device, comprising: a flexible housing; a signal acquisition module, which is arranged inside the flexible housing and is used to acquire physiological parameters and transmit them to a processing location, including a photoelectric sensor for detecting physiological signals, a temperature sensor for detecting skin surface temperature, and a pressure sensor for monitoring blood pressure; a signal processing module, which is connected to the acquisition module and includes an amplifier for amplifying the physiological signal, a filter connected to the amplifier for filtering the physiological signal, and an analog-to-digital converter connected to the filter for converting the physiological signal into a digital signal; a control module, which is respectively connected to the signal acquisition module and the signal processing module, and is used to determine the modulation frequency of the physiological signal based on the signal-to-noise ratio between the physiological signal and thermal noise, or to determine the response time of the photoelectric sensor based on the distortion of the physiological signal, and to determine the acquisition frequency of the physiological signal based on the transmission delay duration of the physiological signal.

[0007] Furthermore, the control module is used to determine whether the measurement accuracy of the photoelectric device meets the requirements based on the signal-to-noise ratio between the physiological signal and the thermal noise. If the signal-to-noise ratio between the physiological signal and the thermal noise is less than or equal to a preset second signal-to-noise ratio, it is determined that the measurement accuracy of the photoelectric device does not meet the requirements.

[0008] Furthermore, the control module is used to preliminarily determine that the measurement reliability of the photoelectric device does not meet the requirements when the signal-to-noise ratio between the physiological signal and the thermal noise is greater than a preset first signal-to-noise ratio and less than or equal to a preset second signal-to-noise ratio, and to determine whether the measurement reliability of the photoelectric device meets the requirements based on the distortion of the physiological signal.

[0009] Furthermore, the control module is configured to increase the modulation frequency of the physiological signal when the signal-to-noise ratio between the physiological signal and the thermal noise is less than or equal to the preset first signal-to-noise ratio;

[0010] The increase amplitude of the modulation frequency of the physiological signal is determined by the difference between a preset first signal-to-noise ratio and a signal-to-noise ratio between the physiological signal and thermal noise.

[0011] Furthermore, the control module is used to determine whether the measurement reliability of the photoelectric device meets the requirements according to the distortion of the physiological signal. If the distortion of the physiological signal is greater than a preset first distortion, it is determined that the measurement reliability of the photoelectric device does not meet the requirements.

[0012] Furthermore, the control module is used to preliminarily determine that the environmental stability measured by the photoelectric device does not meet the requirements when the distortion of the physiological signal is greater than a preset second distortion, and to determine whether the environmental stability measured by the photoelectric device meets the requirements based on the transmission delay time of the physiological signal.

[0013] Furthermore, the control module is configured to reduce the response time of the photoelectric sensor when the distortion of the physiological signal is greater than the preset first distortion and less than or equal to the preset second distortion.

[0014] Furthermore, the reduction range of the response time of the photosensor is determined by the difference between the distortion degree of the physiological signal and a preset first distortion degree.

[0015] Furthermore, the control module is used to determine whether the environmental stability measured by the photoelectric device meets the requirements based on the transmission delay time of the physiological signal. If the transmission delay time of the physiological signal is greater than the preset delay time, it is determined that the environmental stability of the photoelectric device does not meet the requirements, and the acquisition frequency of the physiological signal is increased.

[0016] Furthermore, the increase range of the collection frequency of the physiological signal is determined by the difference between the transmission delay time of the physiological signal and a preset delay time.

[0017] Compared with the prior art, the beneficial effect of the present invention is that the device of the present invention determines the modulation frequency of the physiological signal according to the signal-to-noise ratio between the physiological signal and the thermal noise by setting a flexible shell, a signal acquisition module, a signal processing module and a control module. Due to the thermal motion of electrons in electronic components such as resistors and transistors in portable devices, thermal noise will be generated at a certain temperature, which may interfere with the measurement of weak physiological signals. By increasing the modulation frequency of the physiological signal, the area where low-frequency noise is relatively concentrated can be avoided, and the superposition interference of other low-frequency noise and thermal noise can be reduced, making the signal easier to detect and process. The response time of the photoelectric sensor is determined according to the distortion of the physiological signal. Since the photoelectric device may often bend, fold, etc. during use, fatigue cracks will occur in the conductive material in the circuit. As the bending As the number of times increases, the cracks will gradually expand, resulting in signal transmission loss. By reducing the response time of the photoelectric sensor, the photoelectric sensor can capture signal changes more quickly, convert optical signals into electrical signals in time, reduce signal delays and distortion during the conversion process, and enable the measurement results to more accurately reflect the true situation of physiological parameters. The acquisition frequency of the physiological signal is determined according to the transmission delay of the physiological signal. As water splashes onto the photoelectric device, it causes corrosion of metal parts, reduces conductivity, increases resistance, and thus affects signal transmission. By increasing the acquisition frequency of the physiological signal, more signal samples can be obtained within a certain period of time, thereby capturing the details and changes of the signal more comprehensively, which is helpful for subsequent signal processing and recovery, reducing the impact of noise and distortion on signal analysis, and improving the measurement accuracy of the photoelectric device.

[0018] Furthermore, the device described in the present invention determines the modulation frequency of the physiological signal by setting a preset first signal-to-noise ratio and a preset second signal-to-noise ratio. Due to the thermal motion of electrons in electronic components such as resistors and transistors in portable devices, thermal noise will be generated at a certain temperature, which may interfere with the measurement of weak physiological signals. By increasing the modulation frequency of the physiological signal, it is possible to avoid areas where low-frequency noise is relatively concentrated, reduce the superposition interference of other low-frequency noise and thermal noise, make the signal easier to detect and process, and further improve the measurement accuracy of the photoelectric device.

[0019] Furthermore, the device described in the present invention determines the response time of the photoelectric sensor by setting a preset first distortion degree and a preset second distortion degree. Since the photoelectric device may often bend, fold, etc. during use, fatigue cracks may occur in the conductive material in the circuit. As the number of bending times increases, the cracks will gradually expand, resulting in signal transmission loss. By reducing the response time of the photoelectric sensor, the photoelectric sensor can capture signal changes more quickly and convert optical signals into electrical signals in a timely manner, reducing signal delays and distortions during the conversion process, so that the measurement results can more accurately reflect the true situation of physiological parameters, further improving the measurement accuracy of the photoelectric device.

[0020] Furthermore, the device described in the present invention determines the collection frequency of physiological signals by setting a preset delay time. Since water splashing onto the photoelectric device causes corrosion of metal parts, reduces conductivity, increases resistance, and thus affects signal transmission, by increasing the collection frequency of physiological signals, more signal samples can be obtained within a certain period of time, thereby more comprehensively capturing the details and changes of the signal, which is helpful for subsequent signal processing and recovery, reduces the impact of noise and distortion on signal analysis, and further improves the measurement accuracy of the photoelectric device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a flexible multi-physiological parameter measurement optoelectronic device according to an embodiment of the present invention;

[0022] Figure 2 This is a block diagram of the overall structure of a flexible multi-physiological parameter measurement optoelectronic device according to an embodiment of the present invention;

[0023] Figure 3 A logic flow chart for determining the response time of a photosensor in a flexible multi-physiological parameter measurement photosensor according to an embodiment of the present invention;

[0024] Figure 4 A logic flow chart for determining the frequency of collecting physiological signals of a flexible multi-physiological parameter measurement optoelectronic device according to an embodiment of the present invention;

[0025] The reference numerals are as follows: 1-LED lamp, 2-filter, 3-amplifier, 4-temperature sensor, 5-photoelectric sensor, 6-pressure sensor, 7-analog-to-digital converter. DETAILED DESCRIPTION

[0026] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] See also Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown, they are respectively an overall structural schematic diagram of the flexible multi-physiological parameter measurement optoelectronic device according to an embodiment of the present invention, an overall structural block diagram, a logic flow chart for determining the response time of the photosensor, and a logic flow chart for determining the acquisition frequency of the physiological signal.

[0031] The present invention provides a flexible photoelectric device for measuring multiple physiological parameters, comprising:

[0032] Flexible housing;

[0033] a signal acquisition module, which is disposed inside the flexible housing and is used to collect physiological parameters and transmit them to a processing location, and includes a photoelectric sensor 5 for detecting physiological signals, a temperature sensor 4 for detecting skin surface temperature, and a pressure sensor 6 for monitoring blood pressure;

[0034] a signal processing module connected to the acquisition module, comprising an amplifier 3 for amplifying the physiological signal, a filter 2 connected to the amplifier 3 for filtering the physiological signal, and an analog-to-digital converter 7 connected to the filter 2 for converting the physiological signal into a digital signal;

[0035] A control module is connected to the signal acquisition module and the signal processing module, respectively, and is used to determine the modulation frequency of the physiological signal according to the signal-to-noise ratio between the physiological signal and the thermal noise, or to determine the response time of the photoelectric sensor 5 according to the distortion of the physiological signal, and to determine the acquisition frequency of the physiological signal according to the transmission delay duration of the physiological signal.

[0036] Specifically, the flexible multi-physiological parameter measurement optoelectronic device further includes a power supply module connected to the signal acquisition module and the signal processing module respectively for providing electrical energy.

[0037] Specifically, the optoelectronic device further includes an LED lamp 1 for emitting light display during measurement.

[0038] Specifically, physiological parameters include blood pressure, heart rate, and blood oxygen saturation.

[0039] Specifically, physiological signals include electrocardiogram (ECG) signals, electroencephalogram (EEG) signals, and pulse signals.

[0040] Specifically, the amplifier 3 includes an operational amplifier, a gain amplifier, and a transimpedance amplifier, and a preferred embodiment thereof is a transimpedance amplifier.

[0041] Specifically, the filter 2 includes a low-pass filter, a high-pass filter, and a band-pass filter, and a preferred embodiment thereof is a low-pass filter.

[0042] In practice, the device of the present invention determines the modulation frequency of the physiological signal according to the signal-to-noise ratio between the physiological signal and the thermal noise by setting a flexible shell, a signal acquisition module, a signal processing module and a control module. Due to the thermal motion of electrons in electronic components such as resistors and transistors in portable devices, thermal noise will be generated at a certain temperature, which may interfere with the measurement of weak physiological signals. By increasing the modulation frequency of the physiological signal, the area where low-frequency noise is relatively concentrated can be avoided, and the superposition interference of other low-frequency noise and thermal noise can be reduced, making the signal easier to detect and process. The response time of the photoelectric sensor 5 is determined according to the distortion of the physiological signal. Since the photoelectric device may often bend, fold, etc. during use, fatigue cracks will be generated in the conductive material in the circuit. As the number of bending times increases, the cracks will be The ripples will gradually expand, resulting in signal transmission loss. By reducing the response time of the photoelectric sensor 5, the photoelectric sensor 5 can capture the signal changes more quickly, convert the optical signal into an electrical signal in time, reduce the delay and distortion of the signal during the conversion process, and make the measurement results more accurately reflect the true situation of the physiological parameters. The acquisition frequency of the physiological signal is determined according to the transmission delay of the physiological signal. Since water splashes onto the photoelectric device and causes corrosion of metal parts, reduces the conductivity, increases the resistance, and thus affects the signal transmission, by increasing the acquisition frequency of the physiological signal, more signal samples can be obtained within a certain period of time, thereby capturing the details and changes of the signal more comprehensively, which is helpful for subsequent signal processing and recovery, reducing the impact of noise and distortion on signal analysis, and improving the measurement accuracy of the photoelectric device.

[0043] Specifically, the control module is used to obtain physiological signals and thermal noise respectively, and calculate the signal-to-noise ratio between the physiological signals and the thermal noise. If the signal-to-noise ratio between the physiological signals and the thermal noise is less than or equal to a preset second signal-to-noise ratio, it is determined that the measurement accuracy of the photoelectric device does not meet the requirements.

[0044] Specifically, the control module is used to preliminarily determine that the measurement reliability of the photoelectric device does not meet the requirements when the signal-to-noise ratio between the physiological signal and the thermal noise is greater than a preset first signal-to-noise ratio and less than or equal to a preset second signal-to-noise ratio, and to determine whether the measurement reliability of the photoelectric device meets the requirements based on the distortion of the physiological signal.

[0045] It can be understood that the three intervals divided by the preset first signal-to-noise ratio and the preset second signal-to-noise ratio correspond to three situations respectively:

[0046] The first interval is when the signal-to-noise ratio between the physiological signal and thermal noise is less than or equal to a preset first signal-to-noise ratio. This corresponds to the situation where thermal noise is generated at a certain temperature due to the thermal motion of electrons in electronic components such as resistors and transistors in portable devices, which may interfere with the measurement of weak physiological signals.

[0047] The second interval is when the signal-to-noise ratio between the physiological signal and thermal noise is greater than the preset first signal-to-noise ratio and less than or equal to the preset second signal-to-noise ratio. This corresponds to the situation where, because optoelectronic devices may be frequently bent and folded during use, fatigue cracks may form in the conductive material in the circuit. As the number of bends increases, the cracks gradually expand, resulting in signal transmission loss.

[0048] The third interval is when the signal-to-noise ratio between the physiological signal and the thermal noise is greater than the preset second signal-to-noise ratio, and the corresponding situation is: determining that the measurement accuracy of the photoelectric device meets the requirements.

[0049] In implementation, the preset first signal-to-noise ratio is generally selected from a range of [13dB, 17dB], and the preset second signal-to-noise ratio is generally selected from a range of [18dB, 22dB].

[0050] Preferably, the first signal-to-noise ratio is preset to be 15 dB, and the second signal-to-noise ratio is preset to be 20 dB.

[0051] In implementation, the device described in the present invention determines the measurement accuracy of the photoelectric device by setting a preset first signal-to-noise ratio and a preset second signal-to-noise ratio, thereby reducing the impact of the decreased measurement stability of the photoelectric device due to inaccurate determination of the measurement accuracy of the photoelectric device, and further improving the measurement accuracy of the photoelectric device.

[0052] Specifically, the control module is configured to increase the modulation frequency of the physiological signal when the signal-to-noise ratio between the physiological signal and the thermal noise is less than or equal to the preset first signal-to-noise ratio;

[0053] The increase amplitude of the modulation frequency of the physiological signal is determined by the difference between a preset first signal-to-noise ratio and a signal-to-noise ratio between the physiological signal and thermal noise.

[0054] Specifically, when the difference between the preset first signal-to-noise ratio and the signal-to-noise ratio between the physiological signal and thermal noise is within 3dB, the modulation frequency of the physiological signal is increased to 1.1 times the original value; when the difference between the preset first signal-to-noise ratio and the signal-to-noise ratio between the physiological signal and thermal noise exceeds 3dB, on the basis of the increase to the original value, the modulation frequency of the physiological signal is increased by 10Hz for every 2dB exceeding it. For example, if the difference between the preset first signal-to-noise ratio and the signal-to-noise ratio between the physiological signal and thermal noise is 7dB, the current modulation frequency of the physiological signal is 200Hz, and the increased modulation frequency of the physiological signal is 200×1.1+10×2=240Hz.

[0055] In implementation, the device described in the present invention determines the modulation frequency of the physiological signal by setting a preset first signal-to-noise ratio and a preset second signal-to-noise ratio. Due to the thermal motion of electrons in electronic components such as resistors and transistors in portable devices, thermal noise will be generated at a certain temperature, which may interfere with the measurement of weak physiological signals. By increasing the modulation frequency of the physiological signal, it is possible to avoid areas where low-frequency noise is relatively concentrated, reduce the superposition interference of other low-frequency noise and thermal noise, make the signal easier to detect and process, and further improve the measurement accuracy of the photoelectric device.

[0056] Specifically, the control module is used to determine whether the measurement reliability of the photoelectric device meets the requirements according to the distortion of the physiological signal. If the distortion of the physiological signal is greater than a preset first distortion, it is determined that the measurement reliability of the photoelectric device does not meet the requirements.

[0057] Specifically, the control module is used to preliminarily determine that the environmental stability measured by the photoelectric device does not meet the requirements when the distortion of the physiological signal is greater than a preset second distortion, and to determine whether the environmental stability measured by the photoelectric device meets the requirements based on the transmission delay time of the physiological signal.

[0058] It can be understood that the three intervals divided by the preset first distortion degree and the preset second distortion degree correspond to three situations respectively:

[0059] The first interval is when the distortion degree of the physiological signal is less than or equal to the preset first distortion degree, and the corresponding situation is: determining that the measurement reliability of the photoelectric device meets the requirements;

[0060] The second interval is when the distortion of the physiological signal is greater than the preset first distortion and less than or equal to the preset second distortion. This corresponds to the situation where, because the optoelectronic device may be frequently bent and folded during use, fatigue cracks may form in the conductive material in the circuit. As the number of bends increases, the cracks will gradually expand, resulting in signal transmission loss.

[0061] The third interval is when the distortion of the physiological signal is greater than the preset second distortion. The corresponding situation is: due to water splashing onto the photoelectric device, the metal parts are corroded, the conductivity is reduced, the resistance is increased, and the signal transmission is affected.

[0062] In implementation, the preset first distortion degree is generally selected from a range of [1%, 3%], and the preset second distortion degree is generally selected from a range of [4%, 6%].

[0063] Preferably, the preferred embodiment of the preset first distortion degree is 2%, and the preferred embodiment of the preset second distortion degree is 5%.

[0064] In implementation, the device described in the present invention determines the measurement reliability of the photoelectric device by setting a preset first distortion degree and a preset second distortion degree, thereby reducing the impact of the decrease in measurement accuracy of the photoelectric device due to inaccurate determination of the measurement reliability of the photoelectric device, and further improving the measurement accuracy of the photoelectric device.

[0065] Specifically, the control module is configured to reduce the response time of the photoelectric sensor 5 when the distortion of the physiological signal is greater than the preset first distortion and less than or equal to the preset second distortion.

[0066] Specifically, the reduction range of the response time of the photosensor 5 is determined by the difference between the distortion degree of the physiological signal and a preset first distortion degree.

[0067] Specifically, when the difference between the distortion degree of the physiological signal and the preset first distortion degree is within 1%, the response time of the photoelectric sensor 5 is reduced to 0.9 times the original time; when the difference between the distortion degree of the physiological signal and the preset first distortion degree exceeds 1%, on the basis of being reduced to 0.9 times the original time, the response time of the photoelectric sensor 5 is reduced by 5μs for every 1% exceeding it. For example, the difference between the distortion degree of the physiological signal and the preset first distortion degree is 3%, the current response time of the photoelectric sensor 5 is 300μs, and the reduced response time of the photoelectric sensor 5 is 300×0.9-5×2=260μs.

[0068] In implementation, the device described in the present invention determines the response time of the photoelectric sensor 5 by setting a preset first distortion degree and a preset second distortion degree. Since the photoelectric device may often bend, fold, etc. during use, fatigue cracks will occur in the conductive material in the circuit. As the number of bending times increases, the cracks will gradually expand, resulting in signal transmission loss. By reducing the response time of the photoelectric sensor 5, the photoelectric sensor 5 can capture the signal changes more quickly, convert the optical signal into an electrical signal in time, reduce the delay and distortion of the signal during the conversion process, so that the measurement results can more accurately reflect the true situation of the physiological parameters, and further improve the measurement accuracy of the photoelectric device.

[0069] Specifically, the control module is used to determine whether the environmental stability measured by the photoelectric device meets the requirements based on the transmission delay time of the physiological signal. If the transmission delay time of the physiological signal is greater than the preset delay time, it is determined that the environmental stability of the photoelectric device does not meet the requirements, and the acquisition frequency of the physiological signal is increased.

[0070] It is understandable that the two intervals divided by the preset delay time correspond to two situations:

[0071] The first interval is when the transmission delay of the physiological signal is less than or equal to the preset delay, and the corresponding situation is: determining that the environmental stability of the optoelectronic device meets the requirements;

[0072] The second interval is when the transmission delay of the physiological signal is longer than the preset delay time. The corresponding situation is: due to water splashing onto the photoelectric device, the metal parts are corroded, the conductivity is reduced, the resistance is increased, and the signal transmission is affected.

[0073] In practice, the preset delay time is generally selected in the range of [40ms, 60ms].

[0074] Preferably, the preset delay time is 50 ms.

[0075] In implementation, the device described in the present invention determines the environmental stability of the photoelectric device measurement by setting a preset delay time, thereby reducing the impact of the decreased measurement accuracy of the photoelectric device due to inaccurate determination of the environmental stability of the photoelectric device measurement, and further improving the measurement accuracy of the photoelectric device.

[0076] Specifically, the increase range of the collection frequency of the physiological signal is determined by the difference between the transmission delay time of the physiological signal and the preset delay time.

[0077] Specifically, when the difference between the transmission delay of the physiological signal and the preset delay is within 5ms, the acquisition frequency of the physiological signal is increased to 1.2 times the original frequency; when the difference between the transmission delay of the physiological signal and the preset delay exceeds 5ms, on the basis of being increased to 1.1 times the original frequency, the acquisition frequency of the physiological signal is increased by 10Hz for every 2ms exceeding it. For example, the difference between the transmission delay of the physiological signal and the preset delay is 9ms, the current acquisition frequency of the physiological signal is 200Hz, and the increased acquisition frequency of the physiological signal is 200×1.2+10×2=260Hz.

[0078] During implementation, the device described in the present invention determines the frequency of collecting physiological signals by setting a preset delay time. Since water splashing onto the photoelectric device causes corrosion of metal parts, reduces conductivity, increases resistance, and thus affects signal transmission, by increasing the frequency of collecting physiological signals, more signal samples can be obtained within a certain period of time, thereby more comprehensively capturing the details and changes of the signal, which is helpful for subsequent processing and recovery of the signal, reducing the impact of noise and distortion on signal analysis, and further improving the measurement accuracy of the photoelectric device.

[0079] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A flexible photoelectric device for measuring multiple physiological parameters, characterized in that: include: Flexible housing; a signal acquisition module, disposed inside the flexible housing, for collecting physiological parameters and transmitting them to a processing location, comprising a photoelectric sensor for detecting physiological signals, a temperature sensor for detecting skin surface temperature, and a pressure sensor for monitoring blood pressure; a signal processing module connected to the acquisition module, comprising an amplifier for amplifying the physiological signal, a filter connected to the amplifier for filtering the physiological signal, and an analog-to-digital converter connected to the filter for converting the physiological signal into a digital signal; a control module, connected to the signal acquisition module and the signal processing module, respectively, for determining a modulation frequency of the physiological signal based on a signal-to-noise ratio between the physiological signal and thermal noise, or determining a response time of a photoelectric sensor based on a distortion degree of the physiological signal, and determining an acquisition frequency of the physiological signal based on a transmission delay duration of the physiological signal; The control module is used to preliminarily determine that the measurement reliability of the photoelectric device does not meet the requirements when the signal-to-noise ratio between the physiological signal and the thermal noise is greater than a preset first signal-to-noise ratio and less than or equal to a preset second signal-to-noise ratio, and to determine whether the measurement reliability of the photoelectric device meets the requirements based on the distortion of the physiological signal.

2. The flexible multi-physiological parameter measurement optoelectronic device according to claim 1, characterized in that: The control module is used to determine whether the measurement accuracy of the photoelectric device meets the requirements based on the signal-to-noise ratio between the physiological signal and the thermal noise. If the signal-to-noise ratio between the physiological signal and the thermal noise is less than or equal to a preset second signal-to-noise ratio, it is determined that the measurement accuracy of the photoelectric device does not meet the requirements.

3. The flexible multi-physiological parameter measurement optoelectronic device according to claim 2, characterized in that: The control module is configured to increase the modulation frequency of the physiological signal when the signal-to-noise ratio between the physiological signal and the thermal noise is less than or equal to the preset first signal-to-noise ratio; The increase amplitude of the modulation frequency of the physiological signal is determined by the difference between a preset first signal-to-noise ratio and a signal-to-noise ratio between the physiological signal and thermal noise.

4. The flexible multi-physiological parameter measurement optoelectronic device according to claim 3, characterized in that: The control module is used to determine whether the measurement reliability of the photoelectric device meets the requirements according to the distortion of the physiological signal. If the distortion of the physiological signal is greater than a preset first distortion, it is determined that the measurement reliability of the photoelectric device does not meet the requirements.

5. The flexible multi-physiological parameter measurement optoelectronic device according to claim 4, characterized in that: The control module is used to preliminarily determine that the environmental stability measured by the photoelectric device does not meet the requirements when the distortion of the physiological signal is greater than a preset second distortion, and to determine whether the environmental stability measured by the photoelectric device meets the requirements based on the transmission delay of the physiological signal.

6. The flexible multi-physiological parameter measurement optoelectronic device according to claim 5, characterized in that: The control module is configured to reduce the response time of the photosensor when the distortion of the physiological signal is greater than the preset first distortion and less than or equal to the preset second distortion.

7. The flexible multi-physiological parameter measurement optoelectronic device according to claim 6, characterized in that: The reduction range of the response time of the photosensor is determined by the difference between the distortion degree of the physiological signal and a preset first distortion degree.

8. The flexible multi-physiological parameter measurement optoelectronic device according to claim 7, characterized in that: The control module is used to determine whether the environmental stability measured by the photoelectric device meets the requirements based on the transmission delay time of the physiological signal. If the transmission delay time of the physiological signal is greater than the preset delay time, it is determined that the environmental stability of the photoelectric device does not meet the requirements, and the acquisition frequency of the physiological signal is increased.

9. The flexible multi-physiological parameter measurement optoelectronic device according to claim 8, characterized in that: The increase range of the collection frequency of the physiological signal is determined by the difference between the transmission delay time of the physiological signal and the preset delay time.

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