CN106969812A - Flow sensor calibration method and system - Google Patents
Flow sensor calibration method and system Download PDFInfo
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- CN106969812A CN106969812A CN201710218045.XA CN201710218045A CN106969812A CN 106969812 A CN106969812 A CN 106969812A CN 201710218045 A CN201710218045 A CN 201710218045A CN 106969812 A CN106969812 A CN 106969812A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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Abstract
The present invention relates to medical monitoring equipment testing field there is provided a kind of flow sensor calibration method, comprise the following steps：S11, the curve of flow pressure drop detected using differential pressure pickup in corresponding pressure difference under multiple fluid flows, acquisition testing range, the fluid flow are detected by flow sensor to be calibrated；S12, testing range is segmented, curve of flow pressure drop is fitted respectively in multiple sectionalization test ranges, is obtained multiple method of subsection simulation curve, is determined calibration factor；The method of subsection simulation curve is once linear curve or quadratic linear curve.Present invention also offers a kind of system for calibrating flow sensor using above-mentioned calibration method.Efficiency high, the error of flow sensor of the present invention calibration are small, uniformity is high.
Description
Technical field
The present invention relates to medical monitoring equipment testing field, more specifically to a kind of flow sensor calibration method
And system.
Background technology
Flow sensor is the important composition part in the medical monitoring equipment such as lung function instrument, lung ventilator.But it is due to stream
The reasons such as body composition difference, the design of flow sensor and manufacturing process, the measurement result of flow sensor fluid flow is led to
It is commonly present different.Therefore, in order to ensure the accuracy of medical monitoring result, the calibration of flow sensor is then to closing weight
Will.The conventional calibration method of flow sensor is usually required by test of many times measurement such as efflux coefficient, expansibility factor, straight
Footpath than etc. more data, the calculating process that this results in calibration parameter is sufficiently complex, so that calibration efficiency is low；In addition,
The situation that error is larger, uniformity is low when also there is a situation where to measure in real time after calibration.
Accordingly, it would be desirable to a kind of calibration efficiency height, the flow sensor calibration method that error is small, uniformity is high and system.
The content of the invention
It is an object of the invention to provide a kind of flow sensor calibration method and system, for solve calibration efficiency it is low,
The problem of error is big, uniformity is low.
It is an object of the present invention to provide a kind of flow sensor calibration method, this comprises the following steps：
S11, the flow-pressure differential detected using differential pressure pickup in corresponding pressure difference under multiple fluid flows, acquisition testing range
Curve, the fluid flow is detected by flow sensor to be calibrated；
S12, testing range is segmented, flow-differential pressure curve is fitted respectively in multiple sectionalization test ranges, obtained
Multiple method of subsection simulation curve, determine calibration factor；The method of subsection simulation curve is once linear curve or quadratic linear curve.
Further, the S12 comprises the following steps：
S121, default error of fitting threshold value, carry out initial fragment to testing range, convection current are distinguished in multiple sectionalization test ranges
Amount-differential pressure curve is fitted, and obtains multiple method of subsection simulation curve, and the method for subsection simulation curve is once linear curve or secondary line
Linearity curve；
S122, when the corresponding error of fitting of a certain flow meets or exceeds error of fitting threshold value on method of subsection simulation curve, from this
Flow position carries out re-segmenting to testing range, until corresponding be fitted of all flows is missed on method of subsection simulation curve in testing range
Difference is less than error of fitting threshold value, determines calibration factor.
Further, the error of fitting threshold value is 5%.
Further, the error of fitting threshold value is 3%.
Further, the method that initial fragment is carried out to testing range is that testing range is equally divided into N sections, described
N is 2 to 20；Or,
Further, the method that initial fragment is carried out to testing range is that testing range is divided into N section, the N for 2 to
20；Flow is got over hour, and section length is shorter.
Further, it is further comprising the steps of after the step S12：
S13, using calibration module by standard flow by certain flow by flow sensor, according to the flow value and reality of measurement
The flow value of calculating calculates compensating factor；The calibration module is that can produce the fluid generating apparatus of constant volume and flow.
Further, the flow sensor couples with PC calibration terminals, and the calibration method is further comprising the steps of：
S14, by PC calibration terminals by calibration factor and/or compensating factor value write diagnostics parameter, calibrated fluxes sensor just
Beginning characterization data.
Further, the PC calibration terminals couple with flow controller, and the flow controller is used to control to pass through flow
The fluid flow of sensor.
Present invention also offers a kind of system for calibrating flow sensor, including flow sensor, the stream coupled by circuit
Amount controller, differential pressure pickup and PC calibration terminals；The flow controller is used to control the fluid flow by flow sensor,
The differential pressure pickup is used to detect the pressure difference produced by the fluid of flow sensor, and the PC calibration terminals for being by calibration
Number and/or compensating factor value write diagnostics parameter, calibrate the data from initial characteristic.
The calibration method of inventive flow sensor, by carrying out segmentation plan to the flow-pressure differential curve in testing range
Close, improve the accuracy of flow sensor calibration；The fluid parameter complicated without measurement and instrument parameter, improve calibration
Efficiency；Further calibrated by calibration module flow sensor so that different flow sensor stand so as to error
Small, uniformity is high.
Brief description of the drawings
Fig. 1 is the frame diagram of system for calibrating flow sensor in first embodiment of the invention.
Fig. 2 is the frame diagram of first embodiment of the invention alignment modular calibration.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.
Fig. 1 is the system for calibrating flow sensor in first embodiment of the invention, should include the stream coupled by circuit
Quantity sensor, flow controller, differential pressure pickup and PC calibration terminals；The flow controller is used to control to pass through flow sensor
Fluid flow, the differential pressure pickup is used to detect the pressure difference produced by the fluid of flow sensor, the PC calibration terminals
For by calibration factor and/or compensating factor value write diagnostics parameter, the initial characteristic data of calibrated fluxes sensor.
Wherein, the PC calibration terminals in the present embodiment calibration system include control board, pass through the control electricity of PC calibration terminals
Road plate, can set the fluid flow parameter of flow controller.
The system for calibrating flow sensor that the present embodiment is provided is simple in construction, easy to operate, the flow complicated without measurement
Sensor technology parameter is that the calibration of flow sensor can be achieved.
Further, as shown in Fig. 2 the system for calibrating flow sensor of the present embodiment also includes calibration module, the school
Quasi-mode block can be the calibration cylinder with certain volume, pass standard flow by flow by certain flow using with calibration module
Sensor, so as to realize the further calibration of flow sensor progress.The calibration system of this programme is particularly suitable for use in many
Individual flow sensor is calibrated, and can reduce the individual difference between different flow sensor.
Second embodiment of the invention provides a kind of calibration method of flow sensor, comprises the following steps：
S11, the flow-pressure differential detected using differential pressure pickup in corresponding pressure difference under multiple fluid flows, acquisition testing range
Curve, the fluid flow is detected by flow sensor to be calibrated；
S12, testing range is segmented, flow-differential pressure curve is fitted respectively in multiple sectionalization test ranges, obtained
Multiple method of subsection simulation curve, determine calibration factor；The method of subsection simulation curve be once linear curve or quadratic linear curve, really
Determine sectional calibration coefficient.
Present embodiment to testing range by being segmented, to the flow-pressure differential curve in each sectionalization test range
Once linear fitting or secondary existing fitting are carried out respectively, it is and directly direct to the flow-pressure differential curve in testing range
The technical scheme for carrying out existing fitting is compared, and fitting result is more accurate so that flow sensor calibration error it is smaller,
Accuracy is higher.
Further, the S12 comprises the following steps：
S121, default error of fitting threshold value, carry out initial fragment to testing range, convection current are distinguished in multiple sectionalization test ranges
Amount-differential pressure curve is fitted, and obtains multiple method of subsection simulation curve, and the method for subsection simulation curve is once linear curve or secondary line
Linearity curve；
S122, when the corresponding error of fitting of a certain flow meets or exceeds error of fitting threshold value on method of subsection simulation curve, from this
Flow position carries out re-segmenting to testing range, until corresponding be fitted of all flows is missed on method of subsection simulation curve in testing range
Difference is less than error of fitting threshold value, determines calibration factor.
This programme detects all flows on multiple method of subsection simulation curve by pre-setting error threshold by software pointwise
Corresponding error of fitting, by the control of error of fitting value below the error threshold pre-set, then determines method of subsection simulation curve；
This programme further increases the accuracy of curve matching so as to flow compared with the technical scheme for being not provided with error threshold
The error of pick up calibration is smaller.
Further, the error threshold is 5%.The error threshold scope of this programme can obtain more accurate flow and pass
Sensor calibration result.
Further, the error threshold is 3%.Compared with a upper technical scheme, the calibration result of this programme is more accurate
Really.
Can be that testing range is averaged it should be noted that having a variety of for the segmentation method to testing range
Segmentation or non-average mark section.
In an embodiment of the present invention, the method that initial fragment is carried out to testing range is that testing range is equally divided into N
Section, the N is 2 to 20.
Preferably, the method that initial fragment is carried out to testing range is that testing range is divided into N sections, the N is 2 to 20；
Flow is got over hour, and flow is smaller, and section length is shorter.
Further, it is further comprising the steps of after the step S12：
S13, using calibration module by standard flow by certain flow by flow sensor, according to the flow value and reality of measurement
The flow value of calculating determines compensating factor；The calibration module is that can produce the fluid generating apparatus of constant volume and flow, example
Calibration cylinder such as with certain volume.
Specifically, this programme can be in the testing range calibrated in flow sensor, according to the measurement stream of standard flow
Error between value and the actual flow value calculated, by average computation according to corresponding error under multiple fluid flows, really
Determine compensating factor, then flow sensor carries out entire compensation.This programme reduces the individual difference between different flow sensor
It is different so that flow sensor calibration uniformity is more preferable.
It should be noted that the step of being calibrated using calibration module flow sensor, can be in flow sensing
Directly progress calculates and obtains compensating factor when device dispatches from the factory, during the use of follow-up flow measuring unit, using compensating factor to flow
Sensor is calibrated；Can also be that during the use of flow sensor, real time calibration is carried out using calibration module.
Further, the flow sensor couples with PC calibration terminals, and the calibration method is further comprising the steps of：
S14, by PC calibration terminals by calibration factor and/or compensating factor value write diagnostics parameter, calibrated fluxes sensor just
Beginning characterization data.
The PC calibration terminals of this programme be used for automate fitting flow sensor working curve and calculate obtain calibration factor and/
Or the characterisitic parameter such as compensating factor value, and flow sensor is write, data correction is carried out using PC calibration terminals flow sensor,
Simplify calibration steps so that calibration efficiency is higher.
Further, the PC calibration terminals couple with flow controller, and the flow controller flows through flow for control
The fluid flow of sensor.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of flow sensor calibration method, it is characterised in that comprise the following steps：
S11, the flow-pressure differential detected using differential pressure pickup in corresponding pressure difference under multiple fluid flows, acquisition testing range
Curve, the fluid flow is detected by flow sensor to be calibrated；
S12, testing range is segmented, flow-differential pressure curve is fitted respectively in multiple sectionalization test ranges, obtained
Multiple method of subsection simulation curve, determine calibration factor；The method of subsection simulation curve is once linear curve or quadratic linear curve.
2. flow sensor calibration method according to claim 1, it is characterised in that the S12 comprises the following steps：
S121, default error of fitting threshold value, carry out initial fragment to testing range, convection current are distinguished in multiple sectionalization test ranges
Amount-differential pressure curve is fitted, and obtains multiple method of subsection simulation curve, and the method for subsection simulation curve is once linear curve or secondary line
Linearity curve；
S122, when the corresponding error of fitting of a certain flow meets or exceeds error of fitting threshold value on method of subsection simulation curve, from this
Flow position carries out re-segmenting to testing range, until corresponding be fitted of all flows is missed on method of subsection simulation curve in testing range
Difference is less than error of fitting threshold value, determines calibration factor.
3. the calibration method of flow sensor according to claim 1 or 2, it is characterised in that the error of fitting threshold value
For 5%.
4. flow sensor calibration method according to claim 1 or 2, it is characterised in that the error of fitting threshold value is
3%。
5. flow sensor calibration method according to claim 2, it is characterised in that described to be carried out initially to testing range
The method of segmentation is that testing range is equally divided into N sections, and the N is 2 to 20.
6. flow sensor calibration method according to claim 2, it is characterised in that described to be carried out initially to testing range
The method of segmentation is that testing range is divided into N sections, and the N is 2 to 20；Flow is got over hour, and section length is shorter.
7. flow sensor calibration method according to claim 1, it is characterised in that also include after the step S12
Following steps：
S13, using calibration module by standard flow by certain flow by flow sensor, according to the flow value and reality of measurement
The flow value of calculating calculates compensating factor；The calibration module is that can produce the fluid generating apparatus of constant volume and flow.
8. according to the flow sensor calibration method any one of claim 1 to 7, it is characterised in that the flow sensing
Device couples with PC calibration terminals, and the calibration method is further comprising the steps of：
S14, by PC ends calibration terminal by calibration factor and/or compensating factor value write diagnostics parameter, calibrated fluxes sensor
Initial characteristic data.
9. flow sensor calibration method according to claim 8, it is characterised in that the PC calibration terminals are controlled with flow
Device couples, and the flow controller is used to control the fluid flow by flow sensor.
10. a kind of system for calibrating flow sensor, it is characterised in that including coupled by circuit flow sensor, flow control
Device processed, differential pressure pickup and PC calibration terminals；The flow controller is used to control the fluid flow by flow sensor, described
Differential pressure pickup is used to detect the pressure difference produced by the fluid of flow sensor, and the PC calibration terminals are used for calibration factor
And/or compensating factor value write diagnostics parameter, calibrated fluxes sensor from initial characteristic data.
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| CN201710218045.XA CN106969812A (en) | 2017-04-05 | 2017-04-05 | Flow sensor calibration method and system |
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| CN201710218045.XA CN106969812A (en) | 2017-04-05 | 2017-04-05 | Flow sensor calibration method and system |
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| CN201710218045.XA Pending CN106969812A (en) | 2017-04-05 | 2017-04-05 | Flow sensor calibration method and system |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490150A (en) * | 2018-02-10 | 2018-09-04 | 中国科学院东北地理与农业生态研究所 | The indoor high-precision absolute calibration method of soil moisture sensor |
| CN108577845A (en) * | 2018-04-18 | 2018-09-28 | 中国科学院电子学研究所 | Throttling element, differential pressure type lung function parameter monitoring device and flow determine method |
| CN109009131A (en) * | 2018-07-02 | 2018-12-18 | 广州华夏汇海科技有限公司 | Electronics vital capacity measuring device and lung capacity tests system based on Internet of Things |
| CN109029644A (en) * | 2018-08-15 | 2018-12-18 | 威海拙诚燃气安全设备有限公司 | A kind of on-line monitoring method of diaphragm gas meter metering performance |
| CN109222979A (en) * | 2018-07-02 | 2019-01-18 | 广州华夏汇海科技有限公司 | The traffic alignment method of electronics vital capacity measuring device |
| CN109470324A (en) * | 2018-09-18 | 2019-03-15 | 北京七星华创流量计有限公司 | Gas flow calibration method, device, control system and storage medium |
| CN110864769A (en) * | 2018-08-27 | 2020-03-06 | 深圳市美好创亿医疗科技有限公司 | Differential pressure flow sensor classification method and classification system |
| CN110907881A (en) * | 2019-11-29 | 2020-03-24 | 中电装备山东电子有限公司 | Current calibration method and system for power distribution network overhead line monitoring device |
| CN111257620A (en) * | 2020-02-28 | 2020-06-09 | 张苏 | Current detection device and method |
| CN111352021A (en) * | 2020-03-10 | 2020-06-30 | 上海御渡半导体科技有限公司 | Signal calibration method of test equipment |
| CN111998919A (en) * | 2020-08-28 | 2020-11-27 | 金卡智能集团股份有限公司 | Gas meter calibration method and device |
| CN112697976A (en) * | 2020-12-18 | 2021-04-23 | 汉威科技集团股份有限公司 | Gas path flow real-time dynamic adjusting method, system and storage medium |
| CN112798901A (en) * | 2020-12-29 | 2021-05-14 | 成都沃特塞恩电子技术有限公司 | A device calibration system and method |
| CN114526796A (en) * | 2022-02-16 | 2022-05-24 | 安徽省锐凌计量器制造有限公司 | Flowmeter coefficient dynamic correction method for improving range ratio |
| CN114565032A (en) * | 2022-02-21 | 2022-05-31 | 中国石油大学(北京) | Fracturing sand blocking early warning method and device based on pressure data |
| CN118962557A (en) * | 2024-08-23 | 2024-11-15 | 成都玖锦科技有限公司 | A method and system for calibrating source port power data based on multiple intervals |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128989C (en) * | 1996-05-17 | 2003-11-26 | 迪特里奇技术控股公司 | Method for calibrating flow measuring system |
| CN101048645A (en) * | 2004-08-13 | 2007-10-03 | 恩特格里公司 | System and method for calibration of a flow device |
| CN101113922A (en) * | 2006-07-28 | 2008-01-30 | 深圳迈瑞生物医疗电子股份有限公司 | A flow sensor calibration method in a medical respiratory mechanics module |
| CN102435265A (en) * | 2011-09-19 | 2012-05-02 | 苏州聚元微电子有限公司 | Method for correcting precision of ultrasonic flowmeter by time difference method |
| DE102013205003A1 (en) * | 2012-03-22 | 2013-09-26 | First Sensor AG | Calibration of flowmeters |
-
2017
- 2017-04-05 CN CN201710218045.XA patent/CN106969812A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128989C (en) * | 1996-05-17 | 2003-11-26 | 迪特里奇技术控股公司 | Method for calibrating flow measuring system |
| CN101048645A (en) * | 2004-08-13 | 2007-10-03 | 恩特格里公司 | System and method for calibration of a flow device |
| CN101113922A (en) * | 2006-07-28 | 2008-01-30 | 深圳迈瑞生物医疗电子股份有限公司 | A flow sensor calibration method in a medical respiratory mechanics module |
| CN102435265A (en) * | 2011-09-19 | 2012-05-02 | 苏州聚元微电子有限公司 | Method for correcting precision of ultrasonic flowmeter by time difference method |
| DE102013205003A1 (en) * | 2012-03-22 | 2013-09-26 | First Sensor AG | Calibration of flowmeters |
Non-Patent Citations (1)
| Title |
|---|
| 殷侠 等: "《智能仪器原理与设计》", 31 August 2015, 中国电力出版社 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490150A (en) * | 2018-02-10 | 2018-09-04 | 中国科学院东北地理与农业生态研究所 | The indoor high-precision absolute calibration method of soil moisture sensor |
| CN108577845A (en) * | 2018-04-18 | 2018-09-28 | 中国科学院电子学研究所 | Throttling element, differential pressure type lung function parameter monitoring device and flow determine method |
| CN108577845B (en) * | 2018-04-18 | 2021-04-06 | 中国科学院电子学研究所 | Throttling element, differential pressure type lung function parameter monitoring device and flow determining method |
| CN109222979A (en) * | 2018-07-02 | 2019-01-18 | 广州华夏汇海科技有限公司 | The traffic alignment method of electronics vital capacity measuring device |
| CN109009131A (en) * | 2018-07-02 | 2018-12-18 | 广州华夏汇海科技有限公司 | Electronics vital capacity measuring device and lung capacity tests system based on Internet of Things |
| CN109029644A (en) * | 2018-08-15 | 2018-12-18 | 威海拙诚燃气安全设备有限公司 | A kind of on-line monitoring method of diaphragm gas meter metering performance |
| CN110864769A (en) * | 2018-08-27 | 2020-03-06 | 深圳市美好创亿医疗科技有限公司 | Differential pressure flow sensor classification method and classification system |
| CN109470324A (en) * | 2018-09-18 | 2019-03-15 | 北京七星华创流量计有限公司 | Gas flow calibration method, device, control system and storage medium |
| CN109470324B (en) * | 2018-09-18 | 2021-01-15 | 北京七星华创流量计有限公司 | Gas flow calibration method, device, control system and storage medium |
| CN110907881A (en) * | 2019-11-29 | 2020-03-24 | 中电装备山东电子有限公司 | Current calibration method and system for power distribution network overhead line monitoring device |
| CN111257620A (en) * | 2020-02-28 | 2020-06-09 | 张苏 | Current detection device and method |
| CN111352021A (en) * | 2020-03-10 | 2020-06-30 | 上海御渡半导体科技有限公司 | Signal calibration method of test equipment |
| CN111998919A (en) * | 2020-08-28 | 2020-11-27 | 金卡智能集团股份有限公司 | Gas meter calibration method and device |
| CN112697976A (en) * | 2020-12-18 | 2021-04-23 | 汉威科技集团股份有限公司 | Gas path flow real-time dynamic adjusting method, system and storage medium |
| CN112798901A (en) * | 2020-12-29 | 2021-05-14 | 成都沃特塞恩电子技术有限公司 | A device calibration system and method |
| CN112798901B (en) * | 2020-12-29 | 2023-01-10 | 成都沃特塞恩电子技术有限公司 | Equipment calibration system and method |
| CN114526796A (en) * | 2022-02-16 | 2022-05-24 | 安徽省锐凌计量器制造有限公司 | Flowmeter coefficient dynamic correction method for improving range ratio |
| CN114565032A (en) * | 2022-02-21 | 2022-05-31 | 中国石油大学(北京) | Fracturing sand blocking early warning method and device based on pressure data |
| CN118962557A (en) * | 2024-08-23 | 2024-11-15 | 成都玖锦科技有限公司 | A method and system for calibrating source port power data based on multiple intervals |
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