CN102579021A - System and method for measuring pulse blood oxygen - Google Patents
System and method for measuring pulse blood oxygen Download PDFInfo
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- CN102579021A CN102579021A CN2012100315549A CN201210031554A CN102579021A CN 102579021 A CN102579021 A CN 102579021A CN 2012100315549 A CN2012100315549 A CN 2012100315549A CN 201210031554 A CN201210031554 A CN 201210031554A CN 102579021 A CN102579021 A CN 102579021A
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000001301 oxygen Substances 0.000 title claims abstract description 60
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 60
- 239000008280 blood Substances 0.000 title claims abstract description 57
- 210000004369 blood Anatomy 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 43
- 238000004891 communication Methods 0.000 claims abstract description 16
- 230000005622 photoelectricity Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000008054 signal transmission Effects 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 238000002106 pulse oximetry Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 12
- 238000012544 monitoring process Methods 0.000 description 9
- 238000005070 sampling Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
- 230000037361 pathway Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 241001515806 Stictis Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000002496 oximetry Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Abstract
The invention relates to a system and a method for measuring pulse blood oxygen. The system comprises N pulse blood oxygen sensors (11), an upper computer measurement module, a signal transmission line and a lower computer measurement module, wherein the lower computer measurement module comprises a microprocessor (15), an analog digital conversion module (14) which is electrically connected with the microprocessor, a light source driving module (17), a communication interface and shift switches (12), the shift switches are electrically connected with the N sensors, a photoelectricity amplifier module (13) and the light source driving module, one of the N sensors is selected to be communicated with the photoelectricity amplifier module (13) and the light source driving module under the control of the microprocessor, and an output end of the photoelectricity amplifier module is electrically connected with the analog digital conversion module. The method includes that by means of the lower computer measurement module, the N pulse blood oxygen sensors are driven and monitored in a time-sharing mode, N ways of measurement signals and characteristic parameter values are sent to the upper computer measurement module, and each way of the signals are processed, calculated, displayed, stored and the like.
Description
Technical field
The present invention relates to medical electronics, be specifically related to a kind of pulse blood oxygen measuring system and method thereof.
Background technology
The pulse blood oxygen measurement is the method that adopts based on the infrared spectrum of 660,940 nano wave lengths, in the prior art, utilizes a photoelectric sensor to be connected children under guardianship's body tip (like finger, forehead etc.), is connected with measuring device through connecting line; Measuring device generally is the computer that comprises auxiliary circuit, does not contain microprocessor in the auxiliary circuit, all is through unified control of computer and calculating.The concrete measurement is: in measurement, utilize the digital circuits such as analog signal processing circuit, digital translation and microprocessor such as photoelectric sensor (comprising 660,940 nanometers light and photodetectors), optical drive and photoamplifier circuit that are clipped in, twine or closely be attached to the human body tip, through the software approach demodulation, and recover primary pulse wave signal; Relend and help digital signal processing method, obtain eigenvalue, through the calculating of relevant parameter; And the experience comparison coefficient set up of foundation and blood gas analysis standard, and obtain confirming of pulse blood oxygen value, calculate the pulse frequency value according to the prosodic feature of waveform simultaneously; Final pulse oxygen saturation value and the pulse frequency value of obtaining; And, obtaining pulse wave simultaneously according to the alarm limit of the setting processing of reporting to the police, above-mentioned functions generally is to accomplish through a complete pulse oxygenation measurement module; Above-mentioned measurement data; Through serial ports, USB mouth etc., upload data by means of agreement to a processor that possesses Presentation Function, perhaps directly be sent to display system; Carry out the demonstration of waveform and data, thereby constitute a system that possesses the pulse blood oxygen monitoring.In the prior art; Because spectral absorption is a direct current signal; Generally be to adopt pulse modulated method to realize the detection of infrared spectroscopy signals in system design, normally utilize the single passage pulse oxygen saturation that a pick off accomplishes and the measurement of pulse frequency, this pick off generally is made up of luminous tube and a photodetector of 660,940 nanometers; In signal detection, transfer to recover primary pulse wave through separating again.
On the other hand; In the application of reality; Also need in a system that possesses the pulse blood oxygen monitoring function, increase a pulse blood oxygen monitoring function (waveform and data) again; Thereby constitute the application system that possesses synchronous double oxygen saturation monitor function, present common way increases a pulse oxygenation measurement module and pick off exactly again in this system, just can satisfy this application requirements fully.
In the two Oximetry system of above-mentioned structure, adopt fully independently two pulse oxygen modules and pick off to realize having no influence for accuracy property, the system of formation also is feasible; Shortcoming is following: first cost doubles; The secondth, volume doubles, and the 3rd is that power consumption doubles, two other measurement module subsystem; Has no association; Can not play mutual confirmation and improve the credibility of measurement, really the synchronous monitoring of meaning especially occurs in two measurement module subsystems and differs under the great situation.
Summary of the invention
The technical issues that need to address of the present invention are, how a kind of pulse blood oxygen measuring system and method thereof are provided, and can only use a cover measurement subsystem to carry out two blood oxygen synchronism detections.
Above-mentioned first technical problem of the present invention solves like this: make up a kind of pulse blood oxygen measuring system, comprise pulse oximetry sensor, said pick off is plural N, and this system also comprises:
The host computer measurement module is used for receiving, handles and shows N road pulse blood oxygen measuring-signal;
Signal transmission line is used for transmission or multiplexed transmission N road pulse blood oxygen measuring-signal;
The slave computer measurement module is connected with the communication of host computer measuring machine through said signal transmission line, comprises analog-to-digital conversion module, light source driver module, communication interface and the change-over switch of microprocessor and electrical connection thereof; Said change-over switch also is electrically connected N said pick off, photoelectricity amplification module and said light source driver module, selects in the individual said pick off of N one to be communicated with said photoelectricity amplification module and light source driver module down in said microprocessor control; Said photoelectricity amplification module outfan is electrically connected analog-to-digital conversion module.
According to pulse blood oxygen measuring system provided by the invention, it is that wired connection, wireless connections or circuit board wiring connect that said communication connects.
According to pulse blood oxygen measuring system provided by the invention, said signal transmission line also comprises power line, and said signal transmission line is connected with said the next measuring machine with power interface through communication; Said communication interface is built in said communication and the power interface.
According to pulse blood oxygen measuring system provided by the invention, N=2,3 or 4 etc., preferred 2 or 3, N is difficult to guarantee the real-time of every road signal measurement precision and signal processing too greatly.
According to pulse blood oxygen measuring system provided by the invention, said pick off is a photoelectric sensor.
According to pulse blood oxygen measuring system provided by the invention, said host computer measurement module is a central processing system, or PC.
According to pulse blood oxygen measuring system provided by the invention; Said change-over switch is that two N that are electrically connected with N said pick off select a switch, and said two N select a switch to select N single said photoelectricity amplification module and the light source driver module of being communicated with respectively in the said pick off.
Above-mentioned another technical problem of the present invention solves like this: make up a kind of pulse blood oxygen measuring method, utilize a plural N pulse oximetry sensor, may further comprise the steps:
The timesharing of A slave computer measurement module drives and detects N said pick off, carries out the signal mode number conversion simultaneously and upwards sends corresponding N road pulse blood oxygen measuring-signal;
B transmits said N road pulse blood oxygen measuring-signal;
C host computer measurement module receives said N road pulse blood oxygen measuring-signal and each road pulse blood oxygen measuring-signal is handled, calculated and shows.
According to pulse blood oxygen measuring method provided by the invention, the signal that said steps A also is included in before the said analog digital conversion amplifies.
According to pulse blood oxygen measuring method provided by the invention, said transmission is multiplexed transmission, and said transmission comprises modulated process, and said reception comprises demodulation.
According to pulse blood oxygen measuring method provided by the invention, said multiplexed including, but are not limited to is time division multiplex.
According to pulse blood oxygen measuring method provided by the invention, the frequency that timesharing drives in the said steps A is 100~400Hz, its preferred embodiment
(1) during N=2, the frequency that timesharing drives in the said steps A is 200Hz, and said timesharing is the five equilibrium timesharing, and each pick off obtains 5 milliseconds sampling and data processing time;
(2) during N=3, the frequency that timesharing drives in the said steps A is 300Hz, and said timesharing is the five equilibrium timesharing, and each pick off obtains 3.33 milliseconds sampling and data processing time.
According to pulse blood oxygen measuring method provided by the invention, said each road pulse blood oxygen measuring-signal is handled, calculated and demonstration is to carry out synchronously simultaneously or multi-task parallel is handled.
Increase along with N; Each pick off distribute sampling and data processing time just short more, must in sampling and data processing time, accomplish date processing and feature calculation, the calculating of above-mentioned parallel processing will be restricted; Can not ad infinitum increase, therefore best selection N equals 2 or 3.
Pulse blood oxygen measuring system provided by the invention and method thereof, the waveform processing and the calculation of parameter engine of the multi-sensor information of employing hardware timesharing driving and software synchronization compared with prior art have following advantage:
1, same monitoring system and object are that the synchronous contrast with stricti jurise is measured;
2, except that pick off and connection cord, need not many covering devices, cost is low;
3, can keep compatible with the single channel measurement.
Description of drawings
Further the present invention is elaborated below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 is the electric theory diagram of slave computer measurement module in the specific embodiment of the invention;
Fig. 2 is the circuit principle structure sketch map of core among Fig. 1;
Fig. 3 is a transmission of data signals sequential sketch map between slave computer measurement module and the host computer measurement module in the specific embodiment of the invention;
Fig. 4 is the built-in control sequence schematic flow sheet of host computer measurement module in the specific embodiment of the invention;
Fig. 5 is the advance signal separating treatment schematic flow sheet of program shown in Figure 4.
The specific embodiment
The key of the specific embodiment of the invention at first, is described:
1, append a slave computer measurement module, it is independent fully with two pick offs wherein to modulate driver module and signal detection part, and realizes being connected with one of them pick off the timesharing driven and the signal detection of two pick offs of completion through change-over switch; The frequency 200Hz that need only select suitable timesharing to drive then can guarantee every road signal measurement effect, can guarantee the multiple signals synchro measure again;
2, the host computer measurement module adopts software control and data processing method to realize that the signal of two-way blood oxygen separates and date processing, finally obtains the real-time monitoring of two-way blood oxygen; And existing operating system adopts the multi-task parallel mode more, therefore is easy to realize; If desired, can also continue increases the respective sensor in one road signal separation and date processing and the slave computer measurement module, realizes the synchronous real-time monitoring of three road blood oxygen.
The second, specifically realize specifying the present invention in conjunction with the specific embodiment of the invention:
(1) slave computer measurement module
As shown in Figure 1, this slave computer measurement module comprises microprocessor 15 and analog-to-digital conversion module 14, light source driver module 17, communication and the power interface 16 and the change-over switch 12 that are electrically connected; Said change-over switch 12 selects to connect in two pulse oximetry sensor 11 that are electrically connected with the one of which signal end; Another signal end of said change-over switch is electrically connected photoelectricity amplification module 13 and said light source driver module 17, and said change-over switch 12 control ends are electrically connected said microprocessor 15; Said photoelectricity amplification module 13 outfans are electrically connected microprocessor 15 through analog-to-digital conversion module 14.Wherein: two pick offs 11 comprise the first sensor and second pick off.Communication and power interface 16 comprise communication interface and power interface.
As shown in Figure 2; Change-over switch 12 is made up of two chip block K1 and chip K2; And electrical connection interface J1 and the corresponding respectively first sensor and second pick off of being connected of electrical connection interface J2; Its operation principle is: under the control from the control signal A of microprocessor 15, B, C; Signal detection path by integrated amplifier U1, U2, U3 and U4 constitute selects to be connected in the first sensor and second pick off through chip K1; The HONGGUANG that while is made up of transistor Q1, Q2, Q3, Q4 and Q5 and integrated amplifier U5, the constant-current driving of infrared light supply are selected to be connected one same in the first sensor and second pick off, realize to the timesharing of the first sensor and second pick off, independently driving and signal detection, thus the real-time monitoring of acquisition two paths of signals and parameter.
The timesharing driving and the signal detection of the first sensor and second pick off in the specific embodiment of the invention, the concrete signal sequential is as shown in Figure 3, and employing waits the branch time-sharing format, and its cycle is 5 milliseconds.
(2) signal transmission
Corresponding with timesharing driving and signal detection, two road signals adopt time division multiplex upwards to send to the host computer measurement module by the slave computer measurement module.
(3) host computer measurement module
The host computer measurement module adopts computer, is connected with slave computer measurement module cable, and built-in control sequence, specifically as shown in Figure 4, may further comprise the steps:
401) initialization and System self-test specifically comprise: CPU self check, IO port, serial ports, interruption, outside AD etc. carry out initialization;
402) execution and judgement state and pulse oximetry sensor self check? Do specifically comprise: whether the pick off device connect, normal, several sensors?, whether slave computer power supply etc. is normally discerned and is judged.Normally then get into next step, otherwise get into step;
Do 403) signalization detection, light source drive adjustment and pulse oximetry sensor setting and judgement? Specifically comprise: order is provided with pick off, drives to realize the locking of closed-loop feed-back type signal detection and optical drive according to sensor signal detection, adjustment light source.Normally then get into next step, otherwise rest on step 403;
The operation of 404) double-channel signal monitoring, feature identification engine;
405) step 402 is returned in the comprehensive and differentiation of dual pathways blood oxygen, pulse frequency, signal condition).
Also comprise step:
406) according to step 405) result constantly refreshes parameter or states such as output dual pathways waveform, blood oxygen levels and pulse frequency.
Above-mentioned control sequence improves on traditional single channel pulse blood oxygen measuring system procedure basis, only in step 404), 405) with 406) carry out list/dual pathways and replace.This replacement must comprise preposition measuring-signal separating treatment, and is specifically as shown in Figure 5, may further comprise the steps:
501) detect and receive double-channel signal;
502) do you judge first passage? Be to select to get into step 503); Otherwise select to get into step 504);
503) isolate the first passage signal and carry out subsequent treatment again.Perhaps
504) isolate the second channel signal and carry out subsequent treatment again.
The above is merely preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.
Claims (10)
1. a pulse blood oxygen measuring system comprises pulse oximetry sensor (11), it is characterized in that, said pick off is plural N, and this system also comprises:
The host computer measurement module is used for receiving, handles and shows N road pulse blood oxygen measuring-signal;
Signal transmission line is used for transmission or multiplexed transmission N road pulse blood oxygen measuring-signal;
The slave computer measurement module is connected with the communication of host computer measuring machine through said signal transmission line, comprises microprocessor (15) and the analog-to-digital conversion module (14), light source driver module (17), communication interface and the change-over switch (12) that are electrically connected; Said change-over switch also is electrically connected N said pick off, photoelectricity amplification module (13) and said light source driver module, said microprocessor control down in the individual said pick off of selection N be communicated with said photoelectricity amplification module (13) and light source driver module; Said photoelectricity amplification module outfan is electrically connected analog-to-digital conversion module.
2. according to the said pulse blood oxygen measuring device of claim 1, it is characterized in that it is that wired connection, wireless connections or circuit board wiring connect that said communication connects.
3. according to the said pulse blood oxygen measuring device of claim 1, it is characterized in that said signal transmission line also comprises power line, said signal transmission line is connected with said the next measuring machine with power interface (16) through communication; Said communication interface is built in said communication and the power interface (16).
4. according to the said pulse blood oxygen measuring device of claim 1, it is characterized in that said pick off (11) is a photoelectric sensor, N=2 or 3.
5. according to the said pulse blood oxygen measuring device of claim 1; It is characterized in that; Said change-over switch (12) is that two N that are electrically connected with N said pick off select a switch (K1, K2), and said two N select a switch to select N same said photoelectricity amplification module and the light source driver module of being communicated with respectively in the said pick off.
6. a pulse blood oxygen measuring method is characterized in that, utilizes a plural N pulse oximetry sensor, may further comprise the steps:
The timesharing of A slave computer measurement module drives and detects N said pick off (11), carries out the signal mode number conversion simultaneously and upwards sends corresponding N road pulse blood oxygen measuring-signal;
B transmits said N road pulse blood oxygen measuring-signal;
C host computer measurement module receives said N road pulse blood oxygen measuring-signal and each road pulse blood oxygen measuring-signal is handled, calculated and shows.
7. according to the said pulse blood oxygen measuring method of claim 6, it is characterized in that the signal that said steps A also is included in before the said analog digital conversion amplifies.
8. according to the said pulse blood oxygen measuring method of claim 6, it is characterized in that said transmission is multiplexed transmission, said transmission comprises modulated process, and said reception comprises demodulation.
9. said according to Claim 8 pulse blood oxygen measuring method is characterized in that, said multiplexed be time division multiplex.
10. according to the said pulse blood oxygen measuring method of claim 6, it is characterized in that the frequency that timesharing drives in the said steps A is 100~400Hz.
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CN103860155A (en) * | 2012-12-13 | 2014-06-18 | 财团法人工业技术研究院 | Physiological measurement system and method |
CN108020313A (en) * | 2017-12-13 | 2018-05-11 | 苏州合衡动电子科技有限公司 | Remote horizontal vibration monitor system |
CN108135504A (en) * | 2015-09-23 | 2018-06-08 | 皇家飞利浦有限公司 | Modularization monitoring device platform with interchangeable modules |
CN109222994A (en) * | 2018-10-12 | 2019-01-18 | 深圳迈瑞生物医疗电子股份有限公司 | Oxygen saturation monitor display methods and custodial care facility |
CN110292367A (en) * | 2018-03-21 | 2019-10-01 | 杭州兆观传感科技有限公司 | A kind of expansible multi-physiological-parameter monitoring finger ring |
CN110547808A (en) * | 2019-09-24 | 2019-12-10 | 深圳市惟拓力医疗电子有限公司 | Blood oxygen measuring device and system and blood oxygen signal detection method thereof |
CN113056230A (en) * | 2018-10-12 | 2021-06-29 | 深圳迈瑞生物医疗电子股份有限公司 | Medical device |
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