CN101756699A - Method for eliminating zero drift of electronic sphygmomanometer and device adopting the method - Google Patents
Method for eliminating zero drift of electronic sphygmomanometer and device adopting the method Download PDFInfo
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- CN101756699A CN101756699A CN201010000582A CN201010000582A CN101756699A CN 101756699 A CN101756699 A CN 101756699A CN 201010000582 A CN201010000582 A CN 201010000582A CN 201010000582 A CN201010000582 A CN 201010000582A CN 101756699 A CN101756699 A CN 101756699A
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Abstract
The invention relates to a method for eliminating zero drift of an electronic sphygmomanometer and a device adopting the method. The method comprises the following steps: firstly controlling by using a valve before the electronic sphygmomanometer starts to measure every time, disconnecting a pressure sensor air passage and a sleeve strap air passage, communicating with atmosphere, taking an obtained pressure signal as a pressure signal corresponding to zero pressure and taking the pressure signal as a zero pressure reference value to conserve; disconnecting the sensor air passage and the atmosphere and communicating with the sleeve strap air passage to carry out blood pressure measurement; after blood pressure measurement data is obtained by the electronic sphygmomanometer, correcting a pressure signal value obtained by every measurement by means of the conserved zero pressure reference value and carrying out blood pressure calculation and display through taking the data after being calculated and corrected as measuring results. The invention not only can better eliminate the pressure reading error caused by the zero drift of the electronic sphygmomanometer in the blood pressure measurement process of the electronic sphygmomanometer and improve the human body blood pressure measurement accuracy, but also can be used for other technical fields for eliminating the zero drift by applying a pressure sensor.
Description
Technical field
The invention belongs to a kind of bearing calibration of Medical Instruments and adopt the device of this method, be specifically related to a kind of electric sphygmomanometer of eliminating the method for zero drift of electronic sphygmomanometer and adopting this method.
Background technology
The electronic blood pressure meter systems is realized detection, amplification, conditioning and the analysis of cuff pressure by electronic components such as pressure transducer and operational amplifiers, and then obtains subjects's pressure value.Wherein when environmental conditions such as temperature, humidity change or along with the prolongation of service time, the pressure transducer performance can change, finally influence the accuracy that sphygomanometer is measured.Wherein, the pressure transducer performance the most significant change be null offset (that is: the pressure signal of zero pressure correspondence changes).Though by selecting for use high performance pressure sensor (being with functions such as temperature-compensating) can reduce the influence of each factor to pressure transducer null offset, the system of making reaches the designing requirement of blood pressure measurement; But this will significantly increase the production cost of electric sphygmomanometer.
Summary of the invention
The present invention aims to provide a kind of device of eliminating the method for zero drift of electronic sphygmomanometer and adopting this method, in order to eliminate the pressure reading error that electric sphygmomanometer is caused owing to pressure transducer null offset in measuring the blood pressure process, the accuracy that pressurize is measured, the inventive method is simple and easy to do, adopt the apparatus structure of this method simple, easy operating.
The inventive method comprises following content successively:
(1), before electric sphygmomanometer is measured beginning at every turn, by valve control, pressure transducer gas circuit and cuff gas circuit are disconnected, and be communicated with earlier with atmosphere, electric sphygmomanometer with this moment the pressure signal that obtains as the pressure signal of zero pressure correspondence, and it is preserved as zero pressure reference value (F0);
(2), then pick off gas circuit and atmosphere are disconnected, and connect, carry out blood pressure measurement with the cuff gas circuit;
(3), after electric sphygmomanometer obtains pressure measurement data, the pressure signal value (F) that at every turn measures is calibrated, will carry out as measurement result that blood pressure calculates and demonstration through calculating data after the calibration with the zero pressure reference value (F0) of preserving.
Apparatus of the present invention are provided with the computing unit system of band Presentation Function, the pressure transducer that is electrically connected with computing unit system, the inflator pump that be provided with cuff, is connected with cuff, it is characterized in that: described pressure transducer is communicated with atmosphere by vent valve, and is communicated with the cuff gas circuit by the air circuit breaker valve.
The using method of apparatus of the present invention is: before each measurement blood pressure, by the air circuit breaker valve gas circuit of pressure transducer and cuff is turn-offed earlier, and pressure transducer is communicated with atmosphere by the air escape cock valve, the pressure signal (F0) that this moment, computing unit system obtained is the pressure signal corresponding with actual zero pressure, computing unit system is preserved this pressure signal value (F0) corresponding with zero pressure, close the air escape cock valve then, cut-out pressure pick off and atmospheric path, and the gas circuit of pressure transducer and cuff is connected by the air circuit breaker valve, can begin to measure blood pressure after finishing aforesaid operations with the measuring method of conventional electrical sphygomanometer, different is, be re-used as the result computing unit system is proofreaied and correct as corrected value the pressure signal value (F0) corresponding with zero pressure of its preservation to measured value after and carry out blood pressure calculating and demonstration, if for example the pressure signal that records by pressure transducer of computing unit system is F, then (F-F0) is carried out blood pressure as the result after proofreading and correct and calculate and show.
The present invention can realize that each measurement all finishes the zero correction process one time.Generally speaking, the measurement of human blood-pressure approximately needs about one minute time, and in the so short time, the performance parameter of ambient temperature, humidity and pick off obvious variation can not take place; So the null offset of the pressure signal in the measuring process is compared with the pressure signal value (F0) corresponding with zero pressure of single-chip microcomputer record, change very little, thereby in measuring process, ((F0) is benchmark to the pressure signal value corresponding with zero pressure that can write down at the beginning with computing unit system, calculate and proofread and correct the pressure signal that obtains, can reduce the zero drift error of pressure signal greatly like this, and then improve the accuracy of blood pressure measurement.The present invention is when writing down the pressure signal value (F0) corresponding with zero pressure with single-chip microcomputer, by the air escape cock valve pressure transducer is communicated with atmosphere on the one hand, close simultaneously the gas circuit of itself and cuff again, thereby prevent the influence that cuff survival gas pressure produces pressure transducer, guarantee that the pressure that pressure transducer is subjected to equates fully with atmospheric pressure, further improved the accuracy that electric sphygmomanometer is measured.
The inventive method is simple and easy to do, adopt the apparatus structure of this method simple, easy operating, can realize preferably eliminating electric sphygmomanometer in measuring the blood pressure process because the pressure reading error that pressure transducer null offset is caused, the purpose of human blood-pressure accuracy of measurement of improving.
The present invention can also be used for the other technologies field that the applying pressure pick off must be eliminated null offset.
Description of drawings
Fig. 1, apparatus of the present invention embodiment frame structure sketch map
The specific embodiment
This routine electric sphygmomanometer is provided with the single-chip microcomputer computing unit system of band Presentation Function, the pressure transducer that is electrically connected with single-chip microcomputer, the cuff of band deflation feature, the inflator pump that is connected with the cuff gas circuit, and be provided with an air circuit breaker valve, air circuit breaker valve first end is connected with the cuff gas circuit, second end is connected with pressure transducer, vent valve and inflator pump gas circuit respectively, pressure transducer is connected with the atmosphere gas circuit by vent valve, and wherein the control end of air circuit breaker valve, vent valve and inflator pump is electrically connected with the Single-chip Controlling signal output part respectively.
In the present invention, inflator pump can be connected on the front end of air circuit breaker valve, also can be connected on the rear end of air circuit breaker valve, and promptly inflator pump can connect cuff by the air circuit breaker valve, also can directly be connected with cuff.
This routine vent valve has dual-use function: the one, have the required function of conventional electrical sphygomanometer with cuff deflation, the 2nd, calibration null offset required for the present invention operation required with pressure transducer and the anastomosing function of atmosphere, owing to will cut off the gas circuit of itself and cuff during with the connection of pressure transducer and atmosphere for calibration null offset, so vent valve is to be communicated with cuff by the air circuit breaker valve.
The work process of this device is successively:
1, begin to measure at every turn before, the control signal by Single Chip Microcomputer (SCM) system transmit button valve earlier: close the air circuit breaker valve, open vent valve, make disconnected liter of gas circuit of pressure transducer and cuff, and be communicated with atmosphere, assurance pick off gas circuit is interior to be zero pressure;
2, Single Chip Microcomputer (SCM) system collection and preserve this moment pressure measuring value F0 is the pressure measuring value of zero pressure correspondence;
3, the Single Chip Microcomputer (SCM) system control signal of transmit button valve once more: open the air circuit breaker valve, close vent valve, the gas circuit of pressure transducer and cuff is connected, and disconnection is connected with atmospheric.
4, the beginning human blood-pressure is measured.The pressure measuring value of single-chip microcomputer collection is F in measuring process, is the zero pressure benchmark with the pressure measuring value F0 of the zero pressure correspondence of preserving, and measured value F is carried out zero correction, carries out blood pressure with (F-F0) as the measurement result after proofreading and correct and calculates and show.
The present invention not only can be used for the null offset calibration of electric sphygmomanometer, can also be used for the other technologies field that the applying pressure pick off must be eliminated null offset.
Claims (3)
1. eliminate the method for zero drift of electronic sphygmomanometer, it is characterized in that, comprise following content successively:
(1), before electric sphygmomanometer is measured beginning at every turn, by valve control, pressure transducer gas circuit and cuff gas circuit are disconnected, and be communicated with earlier with atmosphere, electric sphygmomanometer with this moment the pressure signal that obtains as the pressure signal of zero pressure correspondence, and it is preserved as zero pressure reference value (F0);
(2), then pick off gas circuit and atmosphere are disconnected, and connect, carry out blood pressure measurement with the cuff gas circuit;
(3), after electric sphygmomanometer obtains pressure measurement data, the pressure signal value (F) that at every turn measures is calibrated, will carry out as measurement result that blood pressure calculates and demonstration through calculating data after the calibration with the zero pressure reference value (F0) of preserving.
2. adopt the electric sphygmomanometer of the described method of claim 1, be provided with the computing unit system of band Presentation Function, the pressure transducer that is electrically connected with computing unit system, the inflator pump that be provided with cuff, is connected with cuff, it is characterized in that: described pressure transducer is communicated with atmosphere by vent valve, and is communicated with the cuff gas circuit by the air circuit breaker valve.
3. electric sphygmomanometer according to claim 2, it is characterized in that: described air circuit breaker valve first end is connected with the cuff gas circuit, second end is connected with pressure transducer, vent valve gas circuit respectively, pressure transducer is communicated with the atmosphere gas circuit by vent valve, and the control end of described air circuit breaker valve, vent valve and inflator pump is electrically connected with the computing unit control signal output ends respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010000582A CN101756699A (en) | 2010-01-12 | 2010-01-12 | Method for eliminating zero drift of electronic sphygmomanometer and device adopting the method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010000582A CN101756699A (en) | 2010-01-12 | 2010-01-12 | Method for eliminating zero drift of electronic sphygmomanometer and device adopting the method |
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| CN101756699A true CN101756699A (en) | 2010-06-30 |
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| CN201010000582A Pending CN101756699A (en) | 2010-01-12 | 2010-01-12 | Method for eliminating zero drift of electronic sphygmomanometer and device adopting the method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975839A (en) * | 2010-08-20 | 2011-02-16 | 河南汉威电子股份有限公司 | Zero self-calibration method of CO2 gas sensor in air |
| CN102293644A (en) * | 2011-06-08 | 2011-12-28 | 何宗彦 | Blood flowing condition detection device and method |
| CN102551695A (en) * | 2012-01-09 | 2012-07-11 | 天津九安医疗电子股份有限公司 | Sphygmomanometer capable of starting and stopping automatically |
| CN102743164A (en) * | 2012-06-29 | 2012-10-24 | 深圳市理邦精密仪器股份有限公司 | Hardware parameter compensation method and system of blood pressure measuring system |
| WO2023151396A1 (en) * | 2022-02-08 | 2023-08-17 | 华为技术有限公司 | Method for calibrating blood pressure measurement function, and electronic device |
-
2010
- 2010-01-12 CN CN201010000582A patent/CN101756699A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975839A (en) * | 2010-08-20 | 2011-02-16 | 河南汉威电子股份有限公司 | Zero self-calibration method of CO2 gas sensor in air |
| CN102293644A (en) * | 2011-06-08 | 2011-12-28 | 何宗彦 | Blood flowing condition detection device and method |
| CN102293644B (en) * | 2011-06-08 | 2012-12-19 | 何宗彦 | Blood flowing condition detection device and method |
| CN102551695A (en) * | 2012-01-09 | 2012-07-11 | 天津九安医疗电子股份有限公司 | Sphygmomanometer capable of starting and stopping automatically |
| CN102551695B (en) * | 2012-01-09 | 2014-04-30 | 天津九安医疗电子股份有限公司 | Sphygmomanometer capable of starting and stopping automatically |
| CN102743164A (en) * | 2012-06-29 | 2012-10-24 | 深圳市理邦精密仪器股份有限公司 | Hardware parameter compensation method and system of blood pressure measuring system |
| CN102743164B (en) * | 2012-06-29 | 2014-02-12 | 深圳市理邦精密仪器股份有限公司 | Hardware parameter compensation method and system of blood pressure measuring system |
| WO2023151396A1 (en) * | 2022-02-08 | 2023-08-17 | 华为技术有限公司 | Method for calibrating blood pressure measurement function, and electronic device |
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Application publication date: 20100630 |