CN102178536B - Method and system for measuring oxygen saturation and heart rate - Google Patents
Method and system for measuring oxygen saturation and heart rate Download PDFInfo
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- CN102178536B CN102178536B CN 201110076472 CN201110076472A CN102178536B CN 102178536 B CN102178536 B CN 102178536B CN 201110076472 CN201110076472 CN 201110076472 CN 201110076472 A CN201110076472 A CN 201110076472A CN 102178536 B CN102178536 B CN 102178536B
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Abstract
The invention discloses a method and a system for measuring oxygen saturation and heart rate, wherein the system comprises a pulse oximeter, a data sending device, a data receiving gateway, a data storage device and a data receiving device. Data can be forwarded to a data center of a server through Bluetooth, wired communication way or ZIGBEE short-distance wireless communication based on user selection. In order to solve the defects in the prior art, the invention provides a method and a system for measuring oxygen saturation and heart rate, wherein the system has high measurement efficiency, is convenient in use and can be operated remotely.
Description
Technical field
The present invention relates to measuring method and the measuring system of a kind of blood oxygen saturation and heart rate.
Background technology
Under the prior art, measurement method of blood oxygen saturation and measuring system have following shortcoming:
1. traditional measurement method of blood oxygen saturation is to the human blood collection, and the recycling blood gas analyzer carries out electro chemical analysis, measures partial pressure of oxygen, calculates blood oxygen saturation.This method not only bothers, and can not carry out continuous monitoring.
2. common noinvasive pulse blood oxygen instrument is expensive, and complexity can only have the professional health care personnel operation.
3. commercially available Portable pulse blood oxygen instrument ratio of precision is relatively poor, especially to the interference shielding ability of motion artifact noise.Can not realize the transmission of teledata, remote medical monitor, diagnosis etc.
Summary of the invention
In order to solve the problems of the prior art, but the purpose of this invention is to provide a kind of detection efficiency high, use the blood oxygen saturation of portable remote control and measuring method and the measuring system of heart rate.
In order to achieve the above object, the invention provides the measuring method of a kind of blood oxygen saturation and heart rate, comprise the steps
(1) use HONGGUANG and infrared light that human body is measured, the result obtains the photo-signal that two-way changes through opto-electronic conversion after measuring;
(2) filter direct current signal, extract AC signal;
(3) use slip window sampling to filter the noise of AC signal, filtered noise then is judged to be a trough when the minima position is in the window medium position, detect trough and continue to slip over several sampled points with rear hatch, but do not reexamine minima, guarantee that a upper trough has left window center, continue to check the next trough of minima location positioning, finally detect peak-to-peak value and pulse cycle;
(4) calculate blood oxygen saturation and heart rate according to the Beer-Lambert law;
(5) blood oxygen saturation and heart rate data are sent to the data receiver gateway by bluetooth module, cable data transmitting device, wireless data transmission device, the data receiver gateway is sent to data storage device with data, and personnel transfer blood oxygen saturation and heart rate data in the data storage device by data sink.
Further improvement of the present invention is, also comprises the step of using amplifier that signal is amplified between described step (1) and step (2).
Further improvement of the present invention is, uses difference amplifier to filter direct current signal in the described step (2), extracts AC signal.
The present invention also provides the measuring system of a kind of blood oxygen saturation and heart rate, and it comprises
Pulse blood oxygen instrument comprises the photoelectric blood oxygen detecting probe, detects and obtains human body to the trap of HONGGUANG and infrared light, and the trap change curve, utilize the Beer-Lambert law to calculate blood oxygen saturation and heart rate;
Data sending device is connected with described pulse blood oxygen instrument, and blood oxygen saturation and heart rate are sent to the data receiver gateway;
The data receiver gateway is connected with described data sending device, collects the data of described data sending device and forwards the data to data storage device;
Data storage device is connected with described data receiver gateway, and blood oxygen saturation and heart rate that described pulse blood oxygen instrument is calculated carry out the data storage;
Data sink is connected with described data storage device, and personnel transfer blood oxygen saturation and heart rate data in the data storage device by data sink.
Further improvement of the present invention is, described pulse blood oxygen instrument comprise H bridge drive circuit, the photoelectric current amplification circuit that is connected with described H bridge drive circuit, the removing DC road that is connected with described photoelectric current amplification circuit, the counting circuit that is connected with described removing DC road respectively, bluetooth module circuit, cable data transport module circuit, wireless data transfer module circuit.
Further improvement of the present invention is that described data sending device is one or more in bluetooth module, cable data transmitting device, the wireless data transmission device.
Further improvement of the present invention is that described wireless data transmission device is ZIGBEE short-distance wireless communication device.
Further improvement of the present invention is that described data storage device is the computer server with data storage function.
Further improvement of the present invention is that described data sink comprises one or more in PC, mobile phone, the palm PC.
Further improvement of the present invention is that described pulse blood oxygen instrument is connected with for the display that shows in real time blood oxygen saturation and heart rate.
Owing to adopted technique scheme, the present invention to have following beneficial effect:
(1) non-invasive measurement of realization blood oxygen saturation and heart rate value, continuous monitoring.
(2) user can be transferred to server with Monitoring Data by the ZIGBEE communication in family, in the open air or outdoorly can forward the data to server database by the smart mobile phone that the Bluetooth communication utilization is equipped with client software.
(3) user or medical personnel can carry out Real-Time Monitoring to the patient by the WEB server of Telnet data center, diagnosis, and personal health archives etc. are set up in the physiological parameter information inquiry, realize the medical services of intelligent network.
Description of drawings
Accompanying drawing 1 is the structural representation of the embodiment of the measuring method of a kind of blood oxygen saturation of the present invention and heart rate and measuring system;
Accompanying drawing 2 is the structural representation of the embodiment of pulse blood oxygen instrument in the measuring method of a kind of blood oxygen saturation of the present invention and heart rate and the measuring system;
Accompanying drawing 3 is for using slip window sampling to determine the sketch map of trough among the measuring method of a kind of blood oxygen saturation of the present invention and heart rate and the measuring system embodiment.
The specific embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
Referring to accompanying drawing 1 to accompanying drawing 3, a kind of blood oxygen saturation of present embodiment and measuring method and the measuring system of heart rate, it comprises
Pulse blood oxygen instrument comprises the photoelectric blood oxygen detecting probe, for detection of obtaining the trap of human body to HONGGUANG and infrared light, and the trap change curve, utilize the Beer-Lambert law to calculate blood oxygen saturation and heart rate; Pulse blood oxygen instrument also comprises H bridge drive circuit, the photoelectric current amplification circuit that is connected with H bridge drive circuit, the removing DC road that is connected with the photoelectric current amplification circuit, the counting circuit that is connected with the removing DC road respectively, bluetooth module circuit, cable data transport module circuit, ZIGBEE short-distance wireless communication device.Pulse blood oxygen instrument also is connected with for the display that shows in real time blood oxygen saturation and heart rate.
Data sending device is connected with pulse blood oxygen instrument, and blood oxygen saturation and heart rate are sent to the data receiver gateway; Data sending device is bluetooth module, cable data transmitting device and ZIGBEE short-distance wireless data transmission device in the present embodiment.
The data receiver gateway is connected with data sending device, collects the data of data sending device and forwards the data to data storage device;
Data storage device is connected with the data receiver gateway, and blood oxygen saturation and heart rate that pulse blood oxygen instrument is calculated carry out the data storage; Data storage device is the computer server with data storage function;
Data sink is connected with data storage device, and personnel transfer blood oxygen saturation and heart rate data in the data storage device by data sink.Data sink comprises PC, mobile phone and palm PC.
Below introduce the operation principle of this measuring system by the measuring method that blood oxygen saturation and heart rate are described in detail in detail.
Referring to accompanying drawing 1 and accompanying drawing 2, the photoelectric blood oxygen detecting probe is placed on position to be detected on the human body, pulse blood oxygen instrument is selected by the IO port and the DA output voltage amplitude drives red-light LED and infrared light LED is alternately luminous, shine tested position, the two-way transillumination obtains the photo-signal that two-way changes through opto-electronic conversion.
Photo-signal is through the photoelectric current amplification circuit, i.e. trans-impedance amplifier OA0 in the present embodiment, and signal is through trans-impedance amplifier OA0 output voltage signal.Comprise very large direct current signal and very little AC signal in the voltage signal this moment, and direct current signal is to be formed by the scattering of the tissues such as the skeleton of human body, muscle, blood vessel to light wave, and the corresponding arterial blood cyclic fluctuation of AC signal is to the absorption effect of light wave.Therefore must the filtering direct current signal, amplify and extract useful AC signal, so with the voltage signal input difference amplifier OA1 of OA0 output.The pseudo-analog ground of difference amplifier is provided by DAC1, and the DAC1 output valve becomes positively related empirical value in the DAC0 output voltage amplitude, and revises by the brightness adaptive algorithm.Alternating component through signal behind the OA1 is exaggerated, only remaining a small amount of flip-flop.Sample the respectively output signal of OA0 and OA1 of ADC, OA0 signal amplitude through the brightness adaptive algorithm analysis Voltage-output amplitude of DAC0 is revised, control LED brightness guarantees that photoelectric current is in the scope that can survey.The OA1 signal is used for revising the output of DAC1 through the analysis of brightness adaptive algorithm, and after guaranteeing to remove direct current, signal is in suitable interval.The AC signal that obtain this moment is exactly that aliasing the pulse wave signal that disturbs.
Pulse wave is a kind of take low-frequency component as main physiological signal, and the pulse energy of Healthy People mainly is distributed in 0.5～5Hz scope.Pulse wave is attended by larger baseline drift and stronger noise jamming, and main interference has three kinds: baseline drift, high frequency random disturbances and motion artifact noise.Therefore the design accuracy that wants to reach higher must be removed these interference.At first sampled signal is removed the high frequency random disturbances through low-pass filtering, then pass through the direct current tracking filter and extract the central remaining DC component of signal, by doing the poor baseline drift interference that flip-flop causes of eliminating with original signal.
Become pulse wave signal mainly in disturbing composition through motion artifact noise after the above processing.Extraction designer people for pulse wave has adopted a lot of diverse ways, detects such as threshold values, and the differential threshold values is sent out, volume wave characteristic extraction algorithm, adaptive filter algorithm, slip window sampling.Because the randomness of motion artifact noise and instability threshold judgement can occur judging by accident and fail to judge etc. and do not meet the actual requirement of actual custodial care facility real-time such as adaptive-filtering and volume wave characteristic extraction algorithm, have increased hardware cost.And sliding window is sent out and can effectively be avoided waveform drift that the motion artifact noise causes and the impact of distortion, and algorithm is simple, and real-time is high.
Slip window sampling is a kind of method of utilizing pulse wave local feature real-time judge pulse cycle, two not isometric formations of the judgement model of pulse cycle, queue row record pulse wave sampled value, short formation is equivalent to the window of a slip on pulse wave signal, window should have one fixed width, greater than the noise time, but need less than pulse cycle.Then judge, process is as follows: then be judged to be a trough when the minima position is in the window medium position, detect trough and continue to slip over several sampled points with rear hatch, but do not reexamine minima, guarantee that a upper trough has left window center, then continue to check the next trough of minima location positioning.Referring to accompanying drawing 3,1 positional representation uses window to determine trough among the figure, and 2 positional representation uses window to determine to leave trough among the figure, and 3 positional representation uses window to seek trough among the figure.Signal detects peak-to-peak value and pulse cycle through slip window sampling, then calculates blood oxygen saturation and heart rate according to the Beer-Lambert law, simultaneously blood oxygen saturation and heart rate is outputed to the LCD demonstration.
Pulse blood oxygen instrument obtains human body to the trap of HONGGUANG and infrared light by Photoelectric Detection, with the trap change curve, after utilizing the Beer-Lambert law to calculate blood oxygen saturation and heart rate blood oxygen saturation and heart rate value are shown at LCD, can pass through bluetooth or ZIGBEE short-distance wireless communication mode according to user's selection simultaneously, forward the data to the data center of server.
Wherein can select to forward the data to by the ZIGBEE communication modes ZIGBEE gateway of family during in family as the user, the ZIGBEE gateway can be crossed the server that the Internet is forwarded to the assigned ip address with data communication device after receiving valid data.When the user can select when outdoor or open-air by the bluetooth communication mode, data are sent on the terminal units such as smart mobile phone that client software is installed, client software the pulse blood oxygen data communication device that receives can be crossed GPRS or the CDMA cell phone network is forwarded to the Internet, arrives the server of assigned ip address by the Internet.
Server is with the data input database that receives.User or medical personnel can carry out Real-Time Monitoring to the patient by the WEB server of Telnet data center, diagnosis, and personal health archives etc. are set up in information inquiry.Can see that by above introduction this system schema can realize the remote real time monitoring to patient's blood oxygen saturation and heart rate, imagine simultaneously the solution of the data communication problem of patient under two kinds of typical environment, can satisfy general patient's demand.
By above-mentioned embodiment, but be not difficult to find out that the present invention is a kind of detection efficiency height, the blood oxygen saturation of using portable remote control and measuring method and the measuring system of heart rate.
Abovely in conjunction with embodiment the present invention is described in detail; only be explanation technical conceive of the present invention and characteristics; its purpose is to allow the people that is familiar with technique understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (3)
1. the measuring method of a blood oxygen saturation and heart rate is characterized in that: comprise the steps
(1) use HONGGUANG and infrared light that human body is measured, the result obtains the photo-signal that two-way changes through opto-electronic conversion after measuring;
(2) filter direct current signal, extract the AC signal step: sampled signal is removed the high frequency random disturbances through low-pass filtering, then pass through the direct current tracking filter and extract the central remaining DC component of signal, by doing the poor baseline drift interference that flip-flop causes of eliminating with original signal;
(3) use slip window sampling to filter the noise of AC signal, filtered noise then is judged to be a trough when the minima position is in the window medium position, detect trough and continue to slip over several sampled points with rear hatch, but do not reexamine minima, guarantee that a upper trough has left window center, continue to check the next trough of minima location positioning, finally detect peak-to-peak value and pulse cycle;
(4) calculate blood oxygen saturation and heart rate according to the Beer-Lambert law;
(5) blood oxygen saturation and heart rate data are sent to the data receiver gateway by bluetooth module, cable data transmitting device, wireless data transmission device, the data receiver gateway is sent to data storage device with data, and personnel transfer blood oxygen saturation and heart rate data in the data storage device by data sink.
2. the measuring method of blood oxygen saturation according to claim 1 and heart rate is characterized in that: also comprise the step of using amplifier that signal is amplified between described step (1) and step (2).
3. the measuring method of blood oxygen saturation according to claim 1 and heart rate is characterized in that: use difference amplifier to filter direct current signal in the described step (2), extract AC signal.
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| CN 201110076472 CN102178536B (en) | 2011-03-29 | 2011-03-29 | Method and system for measuring oxygen saturation and heart rate |
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| CN 201110076472 CN102178536B (en) | 2011-03-29 | 2011-03-29 | Method and system for measuring oxygen saturation and heart rate |
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| CN102178536B true CN102178536B (en) | 2013-04-03 |
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Families Citing this family (15)
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| CN102512139B (en) * | 2011-11-29 | 2015-10-21 | 乔德才 | A kind of maximal oxygen uptake assessment instrument |
| TW201325553A (en) * | 2011-12-22 | 2013-07-01 | Ostar Meditech Corp | Oximeter and pulse monitoring system with irregular heartbeat calculating and displaying functions |
| CN104107038A (en) * | 2013-04-16 | 2014-10-22 | 达尔生技股份有限公司 | Pulse wave signal de-noising processing method and device and pulse oximeter |
| CN103431852B (en) * | 2013-06-25 | 2016-02-24 | 丁保忠 | Old man nurses pulse watch |
| CN103622684A (en) * | 2013-12-11 | 2014-03-12 | 东南大学 | Control method for portable heart rate monitoring system |
| CN103799983A (en) * | 2014-02-11 | 2014-05-21 | 辛勤 | Physiological parameter measurement system |
| CN103892845B (en) * | 2014-04-08 | 2016-06-15 | 中国科学院微电子研究所 | A kind of system of measuring the oxygen content of blood |
| KR101663239B1 (en) * | 2014-11-18 | 2016-10-06 | 상명대학교서울산학협력단 | Method and System for social relationship based on HRC by Micro movement of body |
| WO2017025869A1 (en) * | 2015-08-10 | 2017-02-16 | Koninklijke Philips N.V. | Simplified display of end-tidal co2 |
| WO2017050856A1 (en) * | 2015-09-23 | 2017-03-30 | Koninklijke Philips N.V. | Pulse oximeter suggests another test |
| CN106725412A (en) * | 2017-03-21 | 2017-05-31 | 广西师范大学 | Method for measuring heart rate and device |
| CN107184187B (en) * | 2017-07-03 | 2019-08-02 | 重庆大学 | Pulse Wave Signal Denoising processing method based on DTCWT-Spline |
| CN107456219B (en) * | 2017-09-07 | 2020-10-30 | 成都云卫康医疗科技有限公司 | Dynamic heart rate and blood oxygen measurement method based on Pearson correlation coefficient |
| CN107468221B (en) * | 2017-09-12 | 2020-05-01 | 济南大学 | Pulse wave signal processing method based on Giardia pulse science and lung cancer detection system |
| CN108618757A (en) * | 2018-03-27 | 2018-10-09 | 成都信息工程大学 | A kind of wireless physical sign monitoring system and method for health care double-purpose |
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