CN102435391A - Apparatus for detecting precision of pressure scan system sensor in real time - Google Patents
Apparatus for detecting precision of pressure scan system sensor in real time Download PDFInfo
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- CN102435391A CN102435391A CN2011103329820A CN201110332982A CN102435391A CN 102435391 A CN102435391 A CN 102435391A CN 2011103329820 A CN2011103329820 A CN 2011103329820A CN 201110332982 A CN201110332982 A CN 201110332982A CN 102435391 A CN102435391 A CN 102435391A
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Abstract
The invention discloses an apparatus for detecting precision of a pressure scan system sensor in real time. Pressure transducers acquire pressure outputted by a sensor calibration system and send the pressure to a multi-path converter, and simulation pressure data is obtained. Through an AD converted, digital signal pressure data is obtained, through pressure scan acquisition system serial scanning, real-time pressure data is obtained, and simultaneously through high speed parallel acquisition card parallel acquisition, parallel data is obtained and transmitted to an industrial controller. The industrial controller transmits the parallel data to a pressure calibration source, pressure calibration is carried out on each pressure transducer respectively, and calibration data is obtained. The industrial controller takes the calibration data as a pressure standard, carries out precision grade detection on corresponding real-time pressure data, and detects a precision grade of the pressure transducers respectively. According to the invention, detecting precision of the pressure scan system sensor in real time can be carried out, a method is simple and reliable, and practicality is strong.
Description
Technical field
The present invention relates to examine and determine pressure scanning system sensor technical field, especially a kind of device of real-time calibrating pressure scanning system sensor precision.
Background technology
The pressure scanning system is a kind of pressure scanning formula pressure acquisition instrument, in wind tunnel experiment, is mainly used in the collection of airfoil surface pressure distribution, hole wall pressure power.The pressure scanning system is made up of a plurality of pressure data passages.For example present 9816 general Ethernet intelligent pressure scanning systems, thousands of pressure data passages of scanning collection at most simultaneously.The core of pressure data passage is a pressure transducer, in pressure transducer scanning collection data procedures, because can there be the sensor acquisition error in a variety of causes.This problem is difficult for coming to light in gathering in real time, tends to make acquisition precision to reduce and causes data error.Some very important occasion must absolute guarantee again image data within error range, so real-time calibrating pressure scanning system sensor finds that in time acquisition precision reduces and degradation, it is extremely important just to seem.Now, many researchs have been carried out in real-time calibrating or calibrating pressure sensor aspect both at home and abroad.As: 1, application number is the set of correction coefficients that the Chinese patent " pressure transducer that has spreadsheet " of CN200680052964.4 mainly can be used for improving the accuracy of this pressure transducer; Be applicable to the collection accuracy that improves single pressure sensor, but can't examine and determine pressure scanning system sensor acquisition precision and quality.2, application number is that the real-time pressure transducer metering result to exceeding error range of the available automatic early warning method of Chinese patent " the error automatic early warning method of the self-defined error range of metering outfit system " of CN200810203406.4 carries out early warning; Realization is to the metering result's of metering outfit strictness control, and the method is only applicable to the single pressure sensor early warning and can't monitors in real time and examine and determine the pressure scanning system.3, application number is the error that lag error, nonlinearity erron and variation of ambient temperature that the Chinese patent " method for compensating signal of high-precision pressure sensor " of CN201010202078.3 can compensating-pressure transducer produce, and the method is only applicable to compensate the error of single pressure sensor.4, application number is the fault or the potential faults of the suitable diagnosis of Chinese patent " sensor device " the angle appearance of CN201010105690.9, and its ultimate principle does not meet the requirement of real-time calibrating pressure scanning system sensor precision yet.Can find out that from above data prior art can't be examined and determine the acquisition precision reduction and the degradation of pressure scanning system sensor in real time at present.
Summary of the invention
Can't examine and determine the acquisition precision reduction of pressure scanning system sensor and the deficiency of degradation in real time in order to overcome prior art; The present invention provides a kind of device of real-time calibrating pressure scanning system sensor precision; Overcoming conventional art can only be to the problem of single pressure sensor precision verification; Can find that in time the acquisition precision of pressure transducer existence reduces and the situation of data acquisition degradation to the precision calibrating in real time of pressure scanning system sensor, to guarantee the accuracy of pressure scanning system sensor image data.
The technical solution adopted for the present invention to solve the technical problems is: comprise sensor calibrating system, a N pressure transducer, a M traffic pilot, 16 high-speed A/D converters, pressure scanning acquisition system, real-time pressure storer, Industrial Control Computer, high-speed parallel capture card, pressure calibration source, calibration data memory.N is any natural number more than or equal to 16, N=16 * M, 1＜=M＜=256.
Within each pressure transducer range, select G to count from low to high arbitrarily; 5＜=G＜=10; Pressure transducer calibration method according to national regulation is carried out the calibrating of trueness error with 5-10 group data, generally selects 10 groups, and the G group pressure of N pressure transducer pick-up transducers calibration system output is to M traffic pilot; Obtain G group analog pressure data, be converted to G group digital signal pressure data P through 16 high-speed A/D converters
Digital signal N, obtain G group real-time pressure data P according to the serial scan of time order and function order by the pressure scanning acquisition system
Real-time N, and depositing the real-time pressure storer in, high-speed parallel capture card parallel acquisition G organizes digital signal pressure data P simultaneously
Digital signal N, obtain parallel data P
Parallel N, transferring to Industrial Control Computer, Industrial Control Computer is with parallel data P
Parallel NTransfer to the pressure calibration source, N pressure transducer carried out pressure calibration respectively, and with calibration data P
Calibration NDeposit in the calibration data memory, Industrial Control Computer is called in the P of G group respectively from calibration data memory
Calibration NData, from the real-time pressure storer, call in the P of G group
Real-time NData are with G group calibration data P
Calibration NBe pressure criteria, according to the pressure transducer calibration method of national regulation, to the P of corresponding G group
Real-time NData are carried out the accuracy class calibrating, examine and determine the pressure data P of N pressure transducer respectively
Real-time NAccuracy class.When the trueness error of some pressure transducers during, explain that the some sensor acquisition precision in the pressure scanning system reduce and degradation greater than the instructions specification error.
Described pressure calibration source comprises compression pump controller, air pressure pump and pressure testing and controlling appearance.Be depressed into the compression pump controller with the Industrial Control Computer output DC; The work of drive air compression pump; Through gas circuit starting pressure measurement and control instrument, start the back and organize P from low to high with G respectively through compression pump controller, air pressure pump controlled pressure measurement and control instrument by Industrial Control Computer
Parallel NBe range sequentially, a pairing N pressure transducer carried out pressure calibration respectively, obtain G group calibration data P after the calibration through sensor calibrating system
Calibration N, deposit in the calibration data memory sequentially through Industrial Control Computer.
The invention has the beneficial effects as follows: the present invention overcomes conventional art and can only can examine and determine in real time the precision of pressure scanning system sensor the problem of single pressure sensor precision verification.Accomplish to examine and determine in real time pressure scanning system sensor precision and find that in time pressure transducer exists acquisition precision to reduce the degradation situation.To improve the accuracy that pressure transducer is gathered in real time.Method is simple, reliable, practical, can be widely used in scientific research, commercial production and association area.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Description of drawings
Accompanying drawing 1 is apparatus of the present invention synoptic diagram;
Accompanying drawing 2 is pressure calibration source synoptic diagram (wherein dotted line is a gas circuit).
Embodiment
Fig. 1 is apparatus of the present invention synoptic diagram, selects N=608, M=38, G=10.The employing model is that 10 groups of pressure to 38 models of output that 608 pressure transducers collection models of PSI9816 are sensor calibrating systems of JCX-1 are traffic pilots of ADG731; Obtaining 10 groups of analog pressure data, is that 16 high-speed A/D converters of AD9238 are converted to 10 groups of digital signal pressure data P through model
Digital signal 608, be that the pressure scanning acquisition system of PSI9816-98RK obtains 10 groups of real-time pressure data P according to the serial scan of time order and function order by model
Real-time N, and depositing the real-time pressure storer that model is K9WBG08U1M in, model is 10 groups of digital signal pressure datas of high-speed parallel capture card parallel acquisition P of EM-9135 simultaneously
Digital signal 608, obtain parallel data P
Parallel 608, transferring to model is the Industrial Control Computer of IPC610, Industrial Control Computer is with parallel data P
Parallel 608Transfer to the pressure calibration source, 608 pressure transducers are carried out pressure calibration respectively, and with calibration data P
Calibration 608Deposit in the calibration data memory, Industrial Control Computer is called in 10 groups P respectively from calibration data memory
Calibration 608Data, from the real-time pressure storer, call in 10 groups P
Real-time 608Data are with 10 groups of calibration data P
Calibration 608Be pressure criteria, according to the pressure transducer calibration method of national regulation, to corresponding 10 groups P
Real-time 608Data are carried out accuracy class calibrating, the pressure value P of examining and determine 608 pressure transducers respectively
Real-time NAccuracy class.Through accuracy class calibrating find the trueness error of N=27 pressure transducer be 0.17% with the trueness error of N=118 pressure transducer be 0.18%.The trueness error of N=27 pressure transducer and N=118 pressure transducer all greater than 0.15% error of instructions regulation, shows that the acquisition precision of No. 27 pressure transducers and No. 118 pressure transducers reduces and degradation.
Fig. 2 is a pressure calibration source synoptic diagram, and the pressure calibration source comprises compression pump controller, air pressure pump, pressure testing and controlling appearance.Be depressed into the compression pump controller that model is GDB-1 with the Industrial Control Computer output DC; Driving model is the air pressure pump work of VBH-JC; Starting model through gas circuit is the pressure testing and controlling appearance of CPC-6000, start the back by Industrial Control Computer through compression pump controller, air pressure pump controlled pressure measurement and control instrument respectively with 10 groups from low to high 1 ... 10 P
Parallel NData are range sequentially, through sensor calibrating system pairing 608 pressure transducers are carried out pressure calibration respectively, obtain G group calibration data P after the calibration
Calibration N, deposit in the calibration data memory sequentially through Industrial Control Computer.
The present invention compared with prior art has following significant advantage:
1) overcoming conventional art can only can examine and determine the precision of pressure scanning system sensor the problem of single pressure sensor precision verification in real time.
2) examine and determine pressure scanning system sensor precision in real time and can find in time that pressure transducer exists acquisition precision to reduce and the degradation situation.
3) can improve the accuracy of the real-time image data of pressure scanning system sensor, method is simple, reliable, practical.
The output G group pressure of the course of work: N pressure transducer pick-up transducers calibration system obtains G group analog pressure data to M traffic pilot, is converted to G group digital signal pressure data P through 16 high-speed A/D converters
Digital signal N, obtain G group real-time pressure data P according to the serial scan of time order and function order by the pressure scanning acquisition system
Real-time N, and depositing the real-time pressure storer in, high-speed parallel capture card parallel acquisition G organizes digital signal pressure data P simultaneously
Digital signal N, obtain parallel data P
Parallel N, transferring to Industrial Control Computer, Industrial Control Computer is with parallel data P
Parallel NTransfer to the pressure calibration source.Be depressed into the compression pump controller with the Industrial Control Computer output DC; The work of drive air compression pump; Through gas circuit starting pressure measurement and control instrument, start the back and organize data P from low to high with G respectively through compression pump controller, air pressure pump controlled pressure measurement and control instrument by Industrial Control Computer
Parallel NBe range sequentially, a pairing N pressure transducer carried out pressure calibration respectively, obtain G group calibration data P after the calibration through sensor calibrating system
Calibration N, deposit in the calibration data memory sequentially through Industrial Control Computer.Industrial Control Computer is called in the P of G group respectively from calibration data memory
Calibration NData, from the real-time pressure storer, call in the P of G group
Real-time NData are with G group calibration data P
Calibration NBe pressure criteria, according to the pressure transducer calibration method of national regulation, to the P of corresponding G group
Real-time NData are carried out accuracy class calibrating, the pressure value P of examining and determine N pressure transducer respectively
Real-time NAccuracy class.When the trueness error of some pressure transducers during, explain that the some sensor acquisition precision in the pressure scanning system reduce and degradation greater than the instructions specification error.
Claims (2)
1. real-time device of calibrating pressure scanning system sensor precision; Comprise sensor calibrating system, a N pressure transducer, a M traffic pilot, 16 high-speed A/D converters, pressure scanning acquisition system, real-time pressure storer, Industrial Control Computer, high-speed parallel capture card, pressure calibration source, calibration data memory; It is characterized in that: N is any natural number more than or equal to 16; N=16 * M, 1＜=M＜=256; Within each pressure transducer range, select G to count from low to high arbitrarily; 5＜=G＜=10; The G group pressure of N pressure transducer pick-up transducers calibration system output is to M traffic pilot; Obtain G group analog pressure data, be converted to G group digital signal pressure data P through 16 high-speed A/D converters
Digital signal N, obtain G group real-time pressure data P according to the serial scan of time order and function order by the pressure scanning acquisition system
Real-time N, and depositing the real-time pressure storer in, high-speed parallel capture card parallel acquisition G organizes digital signal pressure data P simultaneously
Digital signal N, obtain parallel data P
Parallel N, transferring to Industrial Control Computer, Industrial Control Computer is with parallel data P
Parallel NTransfer to the pressure calibration source, N pressure transducer carried out pressure calibration respectively, and with calibration data P
Calibration NDeposit in the calibration data memory, Industrial Control Computer is called in the P of G group respectively from calibration data memory
Calibration NData, from the real-time pressure storer, call in the P of G group
In real time NData are with G group calibration data P
Calibration NBe pressure criteria, to the P of corresponding G group
Real-time NData are carried out the accuracy class calibrating, examine and determine the pressure data P of N pressure transducer respectively
Real-time NAccuracy class.
2. the device of real-time calibrating pressure scanning system sensor precision according to claim 1; It is characterized in that: described pressure calibration source comprises compression pump controller, air pressure pump and pressure testing and controlling appearance; Be depressed into the compression pump controller with the Industrial Control Computer output DC; The work of drive air compression pump through gas circuit starting pressure measurement and control instrument, starts the back and organizes P from low to high with G by Industrial Control Computer respectively through compression pump controller, air pressure pump controlled pressure measurement and control instrument
Parallel NBe range sequentially, a pairing N pressure transducer carried out pressure calibration respectively, obtain G group calibration data P after the calibration through sensor calibrating system
Calibration N, deposit in the calibration data memory sequentially through Industrial Control Computer.
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Cited By (8)
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| CN102661832A (en) * | 2012-05-29 | 2012-09-12 | 西北工业大学 | System and method for correcting precision of sensors of pressure acquisition system |
| CN102680170A (en) * | 2012-05-29 | 2012-09-19 | 西北工业大学 | System for improving accuracy of pressure measuring equipment |
| CN104111157A (en) * | 2014-07-14 | 2014-10-22 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for examining initial readings of wind tunnel measurement instrument |
| CN104596701A (en) * | 2014-12-31 | 2015-05-06 | 重庆川仪自动化股份有限公司 | Temperature and pressure compensation calibration method and system of pressure transmitter |
| CN105588684A (en) * | 2016-02-25 | 2016-05-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Electronic scanning valve pressure measuring system fault automatic diagnosis detection system |
| CN109470406A (en) * | 2018-09-17 | 2019-03-15 | 西北工业大学 | For static calibration system in the air of wall shear stress microsensor |
| CN114295280A (en) * | 2022-03-09 | 2022-04-08 | 成都凯天电子股份有限公司 | Pressure signal scanning measurement system |
| CN114354060A (en) * | 2022-01-04 | 2022-04-15 | 广州市久元自动化设备有限公司 | Device for calibrating precision of industrial sensor of pressure scanning system in real time |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661832A (en) * | 2012-05-29 | 2012-09-12 | 西北工业大学 | System and method for correcting precision of sensors of pressure acquisition system |
| CN102680170A (en) * | 2012-05-29 | 2012-09-19 | 西北工业大学 | System for improving accuracy of pressure measuring equipment |
| CN102680170B (en) * | 2012-05-29 | 2014-04-16 | 西北工业大学 | System for improving accuracy of pressure measuring equipment |
| CN104111157B (en) * | 2014-07-14 | 2017-03-15 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of method for checking wind tunnel instrumentation initial reading |
| CN104111157A (en) * | 2014-07-14 | 2014-10-22 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for examining initial readings of wind tunnel measurement instrument |
| CN104596701A (en) * | 2014-12-31 | 2015-05-06 | 重庆川仪自动化股份有限公司 | Temperature and pressure compensation calibration method and system of pressure transmitter |
| CN104596701B (en) * | 2014-12-31 | 2019-01-18 | 重庆川仪自动化股份有限公司 | The temperature and pressure compensation scaling method and system of pressure transmitter |
| CN105588684A (en) * | 2016-02-25 | 2016-05-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Electronic scanning valve pressure measuring system fault automatic diagnosis detection system |
| CN105588684B (en) * | 2016-02-25 | 2018-05-01 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of electronic scanner pressure measuring system automatic fault diagnosis inspection method |
| CN109470406A (en) * | 2018-09-17 | 2019-03-15 | 西北工业大学 | For static calibration system in the air of wall shear stress microsensor |
| CN114354060A (en) * | 2022-01-04 | 2022-04-15 | 广州市久元自动化设备有限公司 | Device for calibrating precision of industrial sensor of pressure scanning system in real time |
| CN114354060B (en) * | 2022-01-04 | 2023-11-07 | 广州市久元自动化设备有限公司 | Device for detecting accuracy of industrial sensor of pressure scanning system in real time |
| CN114295280A (en) * | 2022-03-09 | 2022-04-08 | 成都凯天电子股份有限公司 | Pressure signal scanning measurement system |
| CN114295280B (en) * | 2022-03-09 | 2022-06-07 | 成都凯天电子股份有限公司 | Pressure signal scanning measurement system |
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