CN102661832A - System and method for correcting precision of sensors of pressure acquisition system - Google Patents
System and method for correcting precision of sensors of pressure acquisition system Download PDFInfo
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- CN102661832A CN102661832A CN2012101703293A CN201210170329A CN102661832A CN 102661832 A CN102661832 A CN 102661832A CN 2012101703293 A CN2012101703293 A CN 2012101703293A CN 201210170329 A CN201210170329 A CN 201210170329A CN 102661832 A CN102661832 A CN 102661832A
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Abstract
The invention discloses a system and a method for correcting precision of sensors of a pressure acquisition system. The method includes: a standard pressure source generates standard data tables of different ranges and precision levels and stores the standard data tables in a PVC (pressure, voltage and coefficient) data table memory, the pressure acquisition system acquires data tables of each pressure sensor and transmits to an industrial computer through an internet server and a pressure acquisition precision correcting module sequentially, and the industrial computer judges the precision level of each pressure sensor and sends higher-precision standard data tables to pressure sensors beyond the error requirement and outputs corresponding pressure to the pressure acquisition system through a PVC data table air pressure output system to correct the precision level of the pressure sensors. By the system and the method for correcting precision of sensors of the pressure acquisition system, peripheral equipment such as nitrogen gas cylinders can be omitted, the method is simple, cost is low, efficiency is high, operating modes are flexible and convenient, a great amount of labor, material resources and financial resources are saved, cost for correction of the pressure acquisition system is lowered, and the system and the method have certain economic and social benefits.
Description
Technical field
The present invention relates to pressure calibration and remote measurement and control technology field, especially a kind of PVC tables of data of utilizing is through the system of internet correction pressure acquisition system sensor accuracy.
Background technology
Pressure acquisition system is made up of the multichannel pressure transducer.Pressure scanning formula pressure acquisition instrument is mainly used in airfoil surface pressure distribution, hole wall pressure force measurement in wind tunnel experiment.Because can there be error in a variety of causes in pressure transducer image data process, so will in preset period, calibrate and revise the precision of pressure acquisition system sensor.Now many researchs have been carried out in the calibration and the correction aspect of pressure acquisition system sensor accuracy both at home and abroad; Particularly substitute the method in pressure calibration source, pressure transducer correction is reached the purpose that guarantees measuring accuracy through remote measurement and control technology with the standard PVC tables of data.For example: 1, application number is 200610088029.5 Chinese patent " error correcting method for pressure sensor "; The imbalance of pressure transducer zero-bit, temperature drift, non-linear three errors are revised, but this patented technology can't be revised the precision of pressure acquisition system sensor.2,2010 04 phases of " Chinese science and technology information " magazine have been delivered the paper that is entitled as " development of multi-path pressure sensor automated calibration system "; Introduced a kind of multi-path pressure sensor automated calibration system; This is a kind of pressure transducer automated calibration system based on the terminal technology, can realize multiple sensor is calibrated simultaneously automatically.But this Technology Need is equipped with nitrogen cylinder, vacuum pump, high-precision pressure controller etc., and required equipment is many and complicated, and can not revise the precision of pressure acquisition system sensor through the internet.3, application number is 201020189756.2 Chinese patent " a kind of device of converting pressure calibration data into data tables ", provides a kind of pressure transducer of measure field being installed with the P-V-C tables of data to calibrate.But this device can't convert the P-V-C tables of data into standard pressure and drive the pressure acquisition system that includes the multichannel pressure transducer.4, application number is the Chinese patent " a kind of remote calibration intelligent pressure sensor system " of 201110332582.X, with P-V-C
Calibration source NV in the tables of data
Calibration source NData output is through D/A transducer output voltage, and then drive compression pump output pressure,, implements the calibration back and generates a new intelligent pressure sensor P-V-C intelligent pressure sensor segmentation pressurization through gas circuit
Calibration NTables of data is replaced original intelligent pressure sensor P-V-C
Inspection NTables of data, thus ensure that the precision after the intelligent pressure sensor calibration is operated in the acceptability limit.But this device only is fit to the calibration to single intelligent pressure sensor, can't use the precision of PVC tables of data through internet correction pressure acquisition system sensor.
Summary of the invention
Can't use the deficiency of PVC tables of data in order to overcome prior art through the precision of internet correction pressure acquisition system sensor; The present invention provides a kind of system of revising the pressure acquisition system sensor accuracy; Utilize the standard PVC tables of data to increase the characteristics of accuracy class step by step; Constantly increase standard PVC tables of data accuracy class, and overproof sensor is revised, reach the requirement of regulation up to the precision of revising the overproof sensor in back.
The technical solution adopted for the present invention to solve the technical problems is: comprise standard pressure generator, PVC data table stores device, Industrial Control Computer, pressure acquisition precision correcting module, Internet Server, PVC tables of data air pressure output system and pressure acquisition system.
Standard pressure generator generates the normal data table of different ranges and accuracy class, comprises atmospheric pressure value and corresponding voltage value, coefficient value; Be stored in the PVC data table stores device; Pressure acquisition system collects each pressure sensor data table; Comprise atmospheric pressure value and corresponding voltage value, coefficient value, through Internet Server, pressure acquisition precision correcting module, transfer to Industrial Control Computer successively; Industrial Control Computer is judged the accuracy class of each pressure transducer; And send more high precision standard tables of data to the pressure transducer that exceeds error requirements, and give pressure acquisition system through the pressure that the output of PVC tables of data air pressure output system is corresponding, revise the accuracy class of this pressure transducer.
Described PVC tables of data air pressure output system comprises single-chip microcomputer, high-speed D, stroke flow-control module and miniature peristaltic pump; Magnitude of voltage in the normal data table transfers to high-speed D through single-chip microcomputer; Convert DC voltage to, stablize meticulous conditioning signal by the output of stroke flow-control module and drive the miniature peristaltic pump output pressure, be applied in the pressure acquisition system through gas circuit; Pressure acquisition system obtains atmospheric pressure value and to deserved magnitude of voltage, coefficient value; Be made into the revised tables of data of pressure transducer, single-chip microcomputer obtains stroke flow feedback quantity through Internet Server, the output of control stroke flow-control module.
The present invention also provides a kind of calibration method of said system, may further comprise the steps:
1) N stable air pressure P of standard pressure generator output
Standard N, simultaneously to V should be arranged
Standard NAnd C
Standard NOutput, P
Standard N=V
Standard N* C
Standard N, wherein, P
Standard NBe N atmospheric pressure value of standard pressure generator output, V
Standard NBe N magnitude of voltage of standard pressure generator output, C
Standard NBe N typical coefficient value of standard pressure generator pressure sensor, with P
Standard N, V
Standard N, C
Standard NThree groups of data are corresponding one by one and be made into normal data table PVC
Standard N, standard pressure generator generates the normal data table PVC of different ranges and accuracy class
Standard N
2) pressure transducer PVC tables of data of storage in every road pressure transducer of pressure acquisition system, each pressure sensor data table PVC
Sensor NP is arranged
Sensor N, V
Sensor N, C
Sensor N, P
Sensor N=V
Sensor N* C
Sensor N, P wherein
Sensor NBe pressure transducer N input air pressure data, V
Sensor NBe N the voltage datas in pressure transducer two ends, C
Sensor NBe pressure transducer N pressure coefficient data;
3) precision of inquiry pressure acquisition system L road sensor in instructions is called in than L road sensor PVC from PVC data table stores device
Sensor NThe PVC of the high grade of precision
Standard NTo Industrial Control Computer, use PVC
Standard NExamine and determine the PVC of L road sensor respectively
Sensor NAccuracy class;
4), increase PVC for the M road pressure transducer that exceeds error requirements
Standard NAccuracy class, through pressure acquisition precision correcting module, Internet Server to PVC tables of data air pressure output system;
5) according to new PVC
Standard NExert pressure, pressure acquisition system obtains N air pressure P
Revise N, simultaneously to N V should be arranged
Revise NWith N C
Revise N, be made into revised tables of data PVC
Revise N
6) pursue the road with revised M road PVC
Revise NTransfer to Industrial Control Computer through Internet Server and pressure acquisition precision correcting module, according to new PVC
Standard NTo PVC
Revise NCarry out the accuracy class calibrating, the PVC that reaches accuracy requirement
Revise NData transfer to pressure acquisition system through Internet Server, with the C that stores in the pressure transducer after adopting least square method to try to achieve fitting a straight line through pressure acquisition precision correcting module
Sensor NBe replaced by C
Revise N
7) repeating step 3) ~ 6), reach requirement up to the precision of revising the overproof sensor in back.
Wherein, L is any natural number greater than 16, wherein L >=M >=T, N is any natural number greater than 2.
Standard pressure generator generates the normal data table PVC of different ranges and accuracy class
Standard NAnd store by PVC data table stores device; Be characterized in: the normal data table under each range is divided into 7 different accuracy classes from low to high, to fundamental error and PVC tables of data precision should be arranged, sees table 1;
Table 1
| Accuracy class | 0.2 | 0.1 | 0.05、 | 0.03、 | 0.02、 | 0.01、 | 0.005 |
| Fundamental error | ±0.2 | ±0.1 | ±0.05 | ±0.03 | ±0.02、 | ±0.01 | ±0.005 |
| PVC tables of data precision | PVC Standard-0.2 | PVC Standard-0.1 | PVC Standard-0.05 | PVC Standard-0.03 | PVC Standard-0.02 | PVC Standard-0.01 | PVC Standard-0.005 |
The invention has the beneficial effects as follows: the present invention is with the precision that progressively improves the overproof sensor of method correction pressure acquisition system of PVC tables of data accuracy class; Can save peripherals such as nitrogen cylinder, vacuum pump, high-precision pressure controller; Method is simple, with low cost, the higher flexible working mode of efficient is convenient; Practiced thrift great amount of manpower and material resources and financial resources, reduced the cost of revising pressure acquisition system, certain economic benefits and social benefit have been arranged.
Description of drawings
Fig. 1 is device synoptic diagram of the present invention (wherein thick line is the internet, and dotted line is a gas circuit);
Fig. 2 is a PVC tables of data air pressure output system synoptic diagram (wherein thick line is the internet, and dotted line is a gas circuit).
Embodiment
The present invention includes standard pressure generator, PVC data table stores device, Industrial Control Computer, pressure acquisition precision correcting module, Internet Server, PVC tables of data air pressure output system, pressure acquisition system.
Pressure acquisition system is made up of L road pressure transducer, the pressure transducer PVC that storage has input characteristics in the storer of every road pressure transducer
Sensor NTables of data, each PVC
Sensor NTables of data has three groups of P
Sensor N, V
Sensor N, C
Sensing Device coefficient NThe tables of data data, every group of tables of data has N input data and meets P
Sensor N=V
Sensor N* C
Sensor coefficient N, P wherein
Sensor NBe pressure transducer N input air pressure data, V
Sensor NBe N the voltage datas in pressure transducer two ends, C
Sensing Device coefficient NBe pressure transducer N pressure coefficient data, with the PVC of the L road pressure transducer of pressure acquisition system
Sensor NThe tables of data data are passed through Internet Server, pressure acquisition precision correcting module to Industrial Control Computer; Use standard pressure generator, P-V-C data table stores device and P-V-C tables of data (claiming the PVC tables of data again) in the technology of Chinese granted patent CN201020189756.2 by name " a kind of device of converting pressure calibration data into data tables ", start N stable air pressure P of standard pressure generator output
Standard N, simultaneously to V should be arranged
Standard NAnd C
Typical coefficient NOutput, meet P
Standard N=V
Standard N* C
Standard system Number N, wherein, P
Standard NBe N atmospheric pressure value of standard pressure generator output, V
Standard NBe N magnitude of voltage of standard pressure generator output, C
Typical coefficient NBe N typical coefficient value of high-precision pressure sensor in the standard pressure generator, with P
Standard N, V
Standard N, C
Typical coefficient NThree groups of data are corresponding one by one, and process normal data table PVC
Calibration N, PVC data table stores device is stored the normal data table PVC that has output characteristics by the various different ranges of standard pressure generator generation and accuracy class
Standard N, be characterized in: the normal data table under each range is divided into 7 different accuracy classes from low to high, and table 1 is seen to fundamental error and PVC tables of data precision should be arranged by institute; From PVC data table stores device, call in the 0.05PVC of the high grade of precision (is that 0.1 grade is an example with sensor accuracy) than L road sensor
Standard-0.05Data are to Industrial Control Computer, implement calibrating according to the following steps and revise: a, according to the method for national regulation calibrating pressure transducer, use PVC
Standard-0.05The tables of data data are sequentially respectively to the PVC of L road sensor
Sensor-0.1The tables of data data are carried out precision verification, examine and determine out L road pressure sensor data P respectively
Sensor NAccuracy class; If b, verification result increase tables of data data precision grade to 0.03 grade PVC when having M road pressure transducer to exceed error
Standard-0.03, through pressure acquisition precision correcting module, Internet Server to PVC tables of data air pressure output system to single-chip microcomputer; C, use PVC
Standard-0.03Voltage data Table V in the tables of data
Standard-0.03Voltage data to high-speed D output DC is depressed into the stroke flow-control module and drives miniature peristaltic pump output pressure P
Output N, being applied to the parallel gas circuit input end of the overproof sensor in M road in the pressure acquisition system through gas circuit, pressure transducer obtains N air pressure P
Revise NData have N V one to one simultaneously
Revise NWith N C
Revise NData are processed the revised tables of data PVC of M road pressure transducer
Revise NData; D, sequentially by the road with revised M road PVC
Revise NTables of data to Industrial Control Computer, according to the pressure transducer calibration method of national regulation, is used PVC through Internet Server, pressure acquisition precision correcting module
Standard-0.03Data are to the revised PVC in M road
Revise NThe tables of data data are carried out the accuracy class calibrating, the revised tables of data PVC of the sensor that reaches accuracy requirement
Revise NThrough pressure acquisition precision correcting module, after the employing least square method is tried to achieve fitting a straight line, corresponding to sequentially the PVC in the pressure transducer storer through Internet Server to pressure acquisition system
Overproof sensor NIn C
Overproof sensor coefficient NThe tables of data of group is replaced by C
Correction factor NTables of data; E, also have the overproof sensor in T road to continue when overproof, the accuracy class that increases tables of data data again is to PVC
Standard-0.02, the overproof sensor in T road is implemented to revise according to a, b, c, four steps of d ..., reach the requirement of instructions up to the precision of revising the overproof sensor in back.(L is any natural number greater than 16, wherein L >=M >=T, N is any natural number greater than 2).
Described PVC tables of data air pressure output system comprises single-chip microcomputer, high-speed D, stroke flow-control module, miniature peristaltic pump.When the precision of pressure transducer is overproof, increase tables of data P
Standard NThe data precision grade is used PVC through pressure acquisition precision correcting module, Internet Server to PVC tables of data air pressure output system
Standard-0.03Voltage data Table V in the tables of data
Standard-0.03Voltage data to high-speed D, converts the output of DC voltage to stroke flow-control module through single-chip microcomputer to, stablizes meticulous adjusting and drives miniature peristaltic pump output P
Output NBe applied to the parallel gas circuit input end of overproof sensor in the pressure acquisition system through gas circuit, pressure transducer obtains N air pressure P
Revise NData have N V one to one simultaneously
Revise NWith N C
Revise NData, and process the revised tables of data PVC of M road pressure transducer
Revise NData are to Internet Server, and single-chip microcomputer obtains stroke flow feedback quantity and controls the output of stroke flow-control module.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is a device synoptic diagram of the present invention, selects L=256, N=10.Pressure acquisition system is made up of No. 256 pressure transducers, with the PVC of No. 256 pressure transducers of pressure acquisition system
Sensor NThe tables of data data are that the Internet Server of CHD485HUB, the pressure acquisition precision correcting module that model is MSC1210-JCX are the Industrial Control Computer of IPC610 to model through model., model calls in 0.05 grade data table PVC from being the PVC data table stores device of MB85RC16 than the high grade of 256 tunnel acquisition system sensor accuracies (0.1 grade)
Standard-0.05Data are to Industrial Control Computer.Implement calibrating and correction: a according to the following steps, use PVC according to the method for national regulation calibrating pressure transducer
Standard-0.05The tables of data data are sequentially respectively to the PVC of No. 256 sensors
Sensor-0.1The tables of data data are carried out precision verification, examine and determine out 256 tunnel pressure sensor data P respectively
Sensor 10Accuracy class.B, verification result also have No. 12 pressure transducers to exceed error, increase tables of data data precision grade to 0.03 grade PVC
Standard-0.03Through pressure acquisition precision correcting module, Internet Server to PVC tables of data air pressure output system is the single-chip microcomputer of TOP2009 to model.C, use PVC
Standard-0.03Voltage data Table V in the tables of data
Standard-0.03Voltage data to model is the high-speed D output dc voltage of DA9238, is that to drive model be the miniature peristaltic pump output pressure P of JCX-BS-14 for the stroke flow-control module of BHBL6-S49-32B/MT to model
Output 10, being applied to the parallel gas circuit input end of 12 tunnel overproof sensors in the pressure acquisition system through gas circuit, pressure transducer obtains 10 air pressure P
Revise NData have 10 V one to one simultaneously
Revise NWith 10 C
Revise NData are processed the revised tables of data PVC of No. 12 pressure transducers
Revise NData; D, sequentially by the road with revised 12 road PVC
Revise NTables of data to Industrial Control Computer, according to the pressure transducer calibration method of national regulation, is used PVC through Internet Server, pressure acquisition precision correcting module
Standard-0.03Data are to 12 tunnel revised PVC
Revise NThe tables of data data are carried out the accuracy class calibrating, tables of data PVC after the sensor correction that reaches accuracy requirement
Revise NThrough pressure acquisition precision correcting module, it is corresponding to sequentially the PVC in the pressure transducer storer through Internet Server to pressure acquisition system to adopt least square method to try to achieve behind the fitting a straight line
Overproof sensor 10In C
Overproof sensor coefficient 10The tables of data of group is replaced by C
Correction factor 10Tables of data; E, also have 2 tunnel overproof sensors to continue when overproof, the accuracy class that increases tables of data data again is to PVC
Standard-0.02, and 2 tunnel overproof sensors are implemented to revise according to four steps of a, b, c, d ..., reach the requirement of instructions up to the precision of revising the overproof sensor in back.
Described PVC tables of data air pressure output system comprises that model is the single-chip microcomputer of TOP2009, the high-speed D that model is DA9238, the stroke flow-control module that model is BHBL6-S49-32B/MT, the miniature peristaltic pump that model is JCX-BS-14.When the precision of pressure transducer exceeds error, increase tables of data data precision grade and use PVC through pressure acquisition precision correcting module, Internet Server to PVC tables of data air pressure output system
Standard-0.03Voltage data Table V in the tables of data
Standard-0.03Voltage data converts the output of DC voltage to stroke flow-control module to through single-chip microcomputer to high-speed D, stablizes meticulous adjusting and drives miniature peristaltic pump output P
Output NBe applied to the parallel gas circuit input end of overproof sensor in the pressure acquisition system through gas circuit, pressure transducer obtains N air pressure P
Revise NData have N V one to one simultaneously
Revise NWith N C
Correction factor NData, and process the revised tables of data PVC of M road pressure transducer
Revise NData are to Internet Server, and single-chip microcomputer obtains stroke flow feedback quantity and controls the output of stroke flow-control module.
The present invention compared with prior art has following significant advantage:
1) can be progressively with the precision of the method that improves PVC tables of data accuracy class by the overproof sensor of grade correction pressure acquisition system.
2) the PVC tables of data that is divided into 7 different accuracy grades under each range from low to high is provided.
3) saved peripherals such as to be equipped with use nitrogen cylinder, vacuum pump, high-precision pressure controller.
4) method is simple, with low cost, the higher flexible working mode of efficient is convenient.
The course of work: with the PVC of pressure acquisition system L road pressure transducer
Sensor NThe tables of data data are passed through Internet Server, pressure acquisition precision correcting module to Industrial Control Computer.N stable air pressure P of standard pressure generator output
Standard N, simultaneously to V should be arranged
Standard NAnd C
Typical coefficient NOutput and meet P
Standard N=V
Standard N* C
Typical coefficient N, with P
Standard N, V
Standard N, C
Standard system Number NThree groups of data are corresponding one by one, and process normal data table PVC
Calibration NPVC data table stores device is stored the normal data table PVC that has output characteristics by the various different ranges of standard pressure generator generation and accuracy class
Standard NBe characterized in: the normal data table under each range is divided into 7 different accuracy class institutes from low to high to fundamental error and PVC tables of data precision should be arranged.From PVC data table stores device, call in 0.05 grade data table PVC than the high grade of acquisition system L road sensor accuracy (0.1 grade)
Standard-0.05Data are to Industrial Control Computer.Implement calibrating according to the following steps and revise: a, according to the method for national regulation calibrating pressure transducer, use PVC
Standard-0.05The tables of data data are sequentially respectively to the PVC of L road sensor
Sensor-0.1The tables of data data are carried out precision verification, examine and determine out L road pressure sensor data P respectively
Sensor NAccuracy class; When b, verification result exceed error as if the precision that M road pressure transducer is arranged, increase tables of data data precision grade to 0.03 grade PVC
Standard-0.03Through pressure acquisition precision correcting module, Internet Server to PVC tables of data air pressure output system to single-chip microcomputer; C, use PVC
Standard-0.03Voltage data Table V in the tables of data
Standard-0.03Voltage data to high-speed D drives the stroke flow-control module to miniature peristaltic pump output pressure P
Output N, being applied to the parallel gas circuit input end of the overproof sensor in M road in the pressure acquisition system through gas circuit, pressure transducer obtains N air pressure P
Revise NData have N V one to one simultaneously
Revise NWith N C
Revise NData, and process the revised tables of data PVC of M road pressure transducer
Revise NData; D, sequentially by the road with revised M road PVC
Revise NTables of data is passed through Internet Server to pressure acquisition precision correcting module to Industrial Control Computer.According to the pressure transducer calibration method of national regulation, use PVC
Standard-0.03Data are to the revised PVC in M road
Revise NThe tables of data data are carried out the accuracy class calibrating, tables of data PVC after the sensor correction that reaches accuracy requirement
Revise NData are through pressure acquisition precision correcting module, and it is corresponding to sequentially the PVC in the pressure transducer storer through Internet Server, pressure acquisition system to adopt least square method to try to achieve behind the fitting a straight line
Overproof sensor NIn C
Overproof sensor coefficient NThe tables of data of group is replaced by C
Correction factor NTables of data; E, when also having the overproof sensor in T road overproof, the accuracy class that increases tables of data data again is to PVC
Standard-0.02, and the overproof sensor in T road implemented to revise according to four steps of a, b, c, d ..., reach the requirement of instructions up to the precision of revising the overproof sensor in back.
Claims (4)
1. system of revising the pressure acquisition system sensor accuracy; Comprise standard pressure generator, PVC data table stores device, Industrial Control Computer, pressure acquisition precision correcting module, Internet Server, PVC tables of data air pressure output system and pressure acquisition system; It is characterized in that: standard pressure generator generates the normal data table of different ranges and accuracy class, comprises atmospheric pressure value and corresponding voltage value, coefficient value; Be stored in the PVC data table stores device; Pressure acquisition system collects each pressure sensor data table; Comprise atmospheric pressure value and corresponding voltage value, coefficient value, through Internet Server, pressure acquisition precision correcting module, transfer to Industrial Control Computer successively; Industrial Control Computer is judged the accuracy class of each pressure transducer; And send more high precision standard tables of data to the pressure transducer that exceeds error requirements, and give pressure acquisition system through the pressure that the output of PVC tables of data air pressure output system is corresponding, revise the accuracy class of this pressure transducer.
2. the system of correction pressure acquisition system sensor accuracy according to claim 1; It is characterized in that: described PVC tables of data air pressure output system comprises single-chip microcomputer, high-speed D, stroke flow-control module and miniature peristaltic pump; Magnitude of voltage in the normal data table transfers to high-speed D through single-chip microcomputer; Convert DC voltage to, stablize meticulous conditioning signal by the output of stroke flow-control module and drive the miniature peristaltic pump output pressure, be applied in the pressure acquisition system through gas circuit; Pressure acquisition system obtains atmospheric pressure value and to deserved magnitude of voltage, coefficient value; Be made into the revised tables of data of pressure transducer, single-chip microcomputer obtains stroke flow feedback quantity through Internet Server, the output of control stroke flow-control module.
3. the method for the said system of claim 1 a correction pressure acquisition system sensor accuracy is characterized in that comprising the steps:
1) N stable air pressure P of standard pressure generator output
Standard N, simultaneously to V should be arranged
Standard NAnd C
Standard NOutput, P
Standard N=V
Standard N* C
Standard N, wherein, P
Standard NBe N atmospheric pressure value of standard pressure generator output, V
Standard NBe N magnitude of voltage of standard pressure generator output, C
Standard NBe N typical coefficient value of standard pressure generator pressure sensor, with P
Mark Accurate N, V
Standard N, C
Standard NThree groups of data are corresponding one by one and be made into normal data table PVC
Standard N, standard pressure generator generates the normal data table PVC of different ranges and accuracy class
Standard N
2) pressure transducer PVC tables of data of storage in every road pressure transducer of pressure acquisition system, each pressure sensor data table PVC
Sensor NP is arranged
Sensor N, V
Sensor N, C
Sensor N, P
Sensor N=V
Sensor N* C
Sensor N, P wherein
Sensor NBe pressure transducer N input air pressure data, V
Sensor NBe N the voltage datas in pressure transducer two ends, C
Sensor NBe pressure transducer N pressure coefficient data;
3) precision of inquiry pressure acquisition system L road sensor is called in than L road sensor PVC from PVC data table stores device
Sensor NThe PVC of the high grade of precision
Standard NTo Industrial Control Computer, use PVC
Standard NExamine and determine the PVC of L road sensor respectively
Sensor NAccuracy class;
4), increase PVC for the M road pressure transducer that exceeds error requirements
Standard NAccuracy class, through pressure acquisition precision correcting module, Internet Server to PVC tables of data air pressure output system;
5) according to new PVC
Standard NExert pressure, pressure acquisition system obtains N air pressure P
Revise N, simultaneously to N V should be arranged
Revise NWith N C
Revise N, be made into revised tables of data PVC
Revise N
6) pursue the road with revised M road PVC
Revise NTransfer to Industrial Control Computer through Internet Server and pressure acquisition precision correcting module, according to new PVC
Standard NTo PVC
Revise NCarry out the accuracy class calibrating, the PVC that reaches accuracy requirement
Revise NData transfer to pressure acquisition system through Internet Server, with the C that stores in the pressure transducer after adopting least square method to try to achieve fitting a straight line through pressure acquisition precision correcting module
Sensor NBe replaced by C
Revise N
7) repeating step 3) ~ 6), reach requirement up to the precision of revising the overproof sensor in back.
4. the method for correction pressure acquisition system sensor accuracy according to claim 3 is characterized in that: described L is any natural number greater than 16, wherein L >=M >=T, N is any natural number greater than 2.
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| CN110542535A (en) * | 2019-07-29 | 2019-12-06 | 中国空气动力研究与发展中心 | Normalization method for pulse wind tunnel multi-sensor negative pressure test system |
| CN110726509A (en) * | 2018-07-17 | 2020-01-24 | 北京振兴计量测试研究所 | Pressure sensor calibrating device |
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| CN103645010A (en) * | 2013-12-09 | 2014-03-19 | 湖北汽车工业学院 | Gas pressure sensor test method for braking system and test system thereof |
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| CN109314828A (en) * | 2016-05-26 | 2019-02-05 | 美商楼氏电子有限公司 | Microphone apparatus with integrated pressure sensor |
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| CN108931336A (en) * | 2017-05-23 | 2018-12-04 | 北京航天计量测试技术研究所 | A kind of high stability pressure control algorithm |
| CN109752485A (en) * | 2017-11-06 | 2019-05-14 | 株式会社堀场制作所 | Bearing calibration, gas analysis system and the pressure oscillation device of gas analyzing apparatus |
| CN109752485B (en) * | 2017-11-06 | 2023-02-21 | 株式会社堀场制作所 | Calibration, pressure correction and inspection method for gas analysis device, and gas analysis system |
| CN110726509A (en) * | 2018-07-17 | 2020-01-24 | 北京振兴计量测试研究所 | Pressure sensor calibrating device |
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| CN111473912A (en) * | 2020-04-09 | 2020-07-31 | 海南省气象科学研究所 | Simple, convenient and efficient digital air pressure sensor adjusting method |
| CN111473912B (en) * | 2020-04-09 | 2022-02-22 | 海南省气象科学研究所 | Simple, convenient and efficient digital air pressure sensor adjusting method |
| CN114705360A (en) * | 2022-06-07 | 2022-07-05 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel stabilization section pressure sensor field detection device |
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Application publication date: 20120912 |