CN102997979A - Differential pressure flowmeter verification system - Google Patents

Differential pressure flowmeter verification system Download PDF

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Publication number
CN102997979A
CN102997979A CN2012105779535A CN201210577953A CN102997979A CN 102997979 A CN102997979 A CN 102997979A CN 2012105779535 A CN2012105779535 A CN 2012105779535A CN 201210577953 A CN201210577953 A CN 201210577953A CN 102997979 A CN102997979 A CN 102997979A
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CN
China
Prior art keywords
differential pressure
flowmeter
verification
pressure flowmeter
verification system
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CN2012105779535A
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Chinese (zh)
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CN102997979B (en
Inventor
王志勇
王刚
邹明伟
王波
刘强
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重庆川仪自动化股份有限公司
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Priority to CN201210577953.5A priority Critical patent/CN102997979B/en
Publication of CN102997979A publication Critical patent/CN102997979A/en
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Publication of CN102997979B publication Critical patent/CN102997979B/en

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Abstract

The invention provides a differential pressure flowmeter verification system and aims at solving the problem that a differential pressure flowmeter verification system in the prior art is large in verification error, complicated in operation and the like. The differential pressure flowmeter verification system comprises an industrial computer, a differential pressure verification module, an electromagnetic flowmeter standard table and a highway addressable remote transducer (HART) converter. The differential pressure verification module comprises a data processing module and a control module and is built in the industrial computer. One end of the HART converter is connected with an HART interface built in a differential pressure flowmeter transducer to be verified, and the other end of the HART converter is connected with the data processing module of the differential pressure verification module through a computer interface. The electromagnetic flowmeter standard table is connected with the industrial computer through an RS232 data interface on the electromagnetic flowmeter standard table. The differential pressure flowmeter verification system has the technical advantages of avoiding system errors at a data acquisition stage of a verification table and some errors caused by misoperation and improving the accuracy of verification results and work efficiency.

Description

The differential pressure flowmeter verification system

  

Invention field

The present invention relates to the differential pressure flowmeter Calibration Technology, specially refer to a kind of differential pressure flowmeter verification system.

Background technology

Prior art differential pressure flowmeter verification system is the differential pressure value that gathers and calculate to obtain the calibrating table by the current output signal that the voltage signal acquisition integrating instrument is treated the 4-20mA of calibrating differential pressure flowmeter (being designated hereinafter simply as the calibrating table) transmitter output.Its detailed process is that the current signal that the voltage signal acquisition integrating instrument is shown transmitter output by a current-to-voltage converting circuit with calibrating is converted to voltage signal, then, the analog-to-digital conversion module AD(built-in by the voltage signal acquisition integrating instrument is designated hereinafter simply as the AD module) voltage signal is converted to digital signal, by algorithm process, can obtain the current differential pressure value of calibrating table again.The differential pressure value of the calibrating table that detects and the instantaneous delivery value of the standard deviation pressure type flowmeter in the calibration system are compared, can obtain demarcating the calibrating data such as the required linearity, reproducibility error and efflux coefficient by repeatedly identical test.Because there is the error of calculation in calibrating table transmitter when processing instantaneous delivery and output current value, the current value of differential pressure galvanometer output also not exclusively is directly proportional with its instantaneous delivery, may cause gauging error thus.Be converted to again the hardware error of the current-to-voltage converting circuit existence of voltage signal owing to the current signal of calibrating being shown transmitter output, and the caused error of AD module samples resolution, gauging error further increased.In addition, need the testing person manually to input each parameter and data in computation sheet in the verification process, not only misoperation also appears in trivial operations easily, thereby causes the verification result mistake.Obviously, prior art differential pressure flowmeter verification system exists the problems such as the large and trivial operations of gauging error.

Summary of the invention

For overcoming the problem such as the large and trivial operations of gauging error that prior art differential pressure flowmeter verification system exists, the present invention proposes a kind of differential pressure flowmeter verification system.Differential pressure flowmeter verification system of the present invention comprises industrial computer, differential pressure assay module, electromagnetic flowmeter standard scale and HART converter; The differential pressure assay module comprises data processing module and control module and is built in industrial computer; One end of HART converter connects the built-in HART interface of differential pressure flowmeter transmitter to be examined and determine, and the other end connects the data processing module of differential pressure assay module by computer interface; The electromagnetic flowmeter standard scale is connected with industrial computer by the RS232 data-interface that carries.

Further, the HART converter of differential pressure flowmeter verification system of the present invention can be changed the HART agreement physical signalling of differential pressure flowmeter use to be examined and determine and the RS-232 serial signal of industrial computer mutually.

Further, the data processing module of differential pressure flowmeter verification system of the present invention can read the data of differential pressure flowmeter to be examined and determine and electromagnetic flowmeter standard scale and show, wherein, the essential information of differential pressure flowmeter to be examined and determine comprises differential pressure value, current value and the flow percentage in manufacturer's identification code, manufacturer's device type code and device id and the verification process; The essential information of electromagnetic flowmeter standard scale comprises instantaneous delivery and integrated flow.

Further, the data processing module of differential pressure flowmeter verification system of the present invention is according to differential pressure value and the electromagnetic flowmeter standard scale aggregate-value of the calibrational capacity point differential pressure flowmeter to be examined and determine of the calibrational capacity point of setting and time each setting of timing acquiring, and the data of collection carried out the processing of error calculating and result of calculation.

Further, the data processing module of differential pressure flowmeter verification system of the present invention can calculate and show procedure parameter and the verification result data in the calibrating and preserve, wherein, procedure parameter comprises differential pressure value, current value and the flow percentage of differential pressure flowmeter to be examined and determine, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; The verification result data comprise COEFFICIENT K and the uncertainty of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation.

The useful technique effect of differential pressure flowmeter verification system of the present invention is to have avoided the systematic error of calibrating table data acquisition phase and the mistake that some maloperations cause, and has improved the accuracy of verification result, has improved work efficiency.

Description of drawings

Accompanying drawing 1 is the structural representation of differential pressure flowmeter verification system of the present invention.

Below in conjunction with drawings and the specific embodiments differential pressure flowmeter verification system of the present invention is further described.

Embodiment

Accompanying drawing 1 is the structural representation of differential pressure flowmeter verification system of the present invention.As seen from the figure, differential pressure flowmeter verification system of the present invention comprises industrial computer, differential pressure assay module, electromagnetic flowmeter standard scale and HART converter; The differential pressure assay module comprises data processing module and control module and is built in industrial computer; One end of HART converter connects the built-in HART interface of differential pressure flowmeter transmitter to be examined and determine, and the other end connects the data processing module of differential pressure assay module by computer interface; The electromagnetic flowmeter standard scale is connected with industrial computer by the RS232 data-interface that carries.

The HART agreement physical signalling that the HART converter of differential pressure flowmeter verification system of the present invention can use differential pressure flowmeter to be examined and determine and the RS-232 serial signal of industrial computer are changed mutually, and its data processing module can read the data of differential pressure flowmeter to be examined and determine and electromagnetic flowmeter standard scale and show; Wherein, the essential information of differential pressure flowmeter to be examined and determine comprises differential pressure value, current value and the flow percentage in manufacturer's identification code, manufacturer's device type code and device id and the verification process; The electromagnetic flowmeter standard scale essential information comprise instantaneous delivery and integrated flow.

In addition, the data processing module of differential pressure flowmeter verification system of the present invention is according to differential pressure value and the electromagnetic flowmeter standard scale aggregate-value of the calibrational capacity point differential pressure flowmeter to be examined and determine of the calibrational capacity point of setting and time each setting of timing acquiring, and the data of collection carried out the processing of error calculating and result of calculation; Can calculate and show procedure parameter and verification result data and preservation in the calibrating, wherein, procedure parameter comprises differential pressure value, current value and the flow percentage of differential pressure flowmeter to be examined and determine, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; The verification result data comprise COEFFICIENT K and the uncertainty of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation.

During concrete calibrating, industrial computer is connected respectively to differential pressure flowmeter to be examined and determine by the HART converter, and the electromagnetic flowmeter standard scale is connected to industrial computer by the RS232 data-interface that it carries.Open industrial computer and read the essential information of differential pressure flowmeter to be examined and determine, comprise manufacturer's identification code, manufacturer's device type code and device id.Input the parameter that the calculated description of differential pressure flowmeter to be examined and determine provides and set calibrational capacity point and the time, the calibrating directive document of described calculated description for working out according to the design parameter of differential pressure flowmeter to industrial computer.After regulating the pipeline flow value, differential pressure flowmeter verification system of the present invention will gather and carries out error and calculate the differential pressure value of the calibrational capacity point differential pressure flowmeter to be examined and determine of each setting and electromagnetic flowmeter standard scale aggregate-value, until all flow points demarcate finish after differential pressure flowmeter verification system of the present invention can calculate and preserve the verification result data, comprise the COEFFICIENT K of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation and uncertainty etc.Differential pressure flowmeter verification system of the present invention does not gather current signal from differential pressure flowmeter to be examined and determine and detects, but directly read differential pressure value (because the differential pressure flowmeter transmitter can be directly from built-in HART interface output parameters or real time data from the HART interface of differential pressure flowmeter transmitter to be examined and determine, so directly link to each other with computing machine by the transmitter of a HART converter with differential pressure flowmeter, then can directly obtain the differential pressure value consistent with the current demonstration of differential pressure flowmeter at computing machine), so just avoided a series of errors that produce in the prior art differential pressure flowmeter verification system signal acquisition process fully.In addition, differential pressure flowmeter verification system of the present invention can show in real time procedure parameter and the verification result data in the verification process and preserve, wherein, procedure parameter comprises differential pressure value, current value and the flow percentage of differential pressure flowmeter to be examined and determine, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; The verification result data comprise COEFFICIENT K and the uncertainty of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation.Have, adopt differential pressure flowmeter verification system of the present invention, reduced operating personnel's manual operation, system finishes all data acquisition operations automatically, has avoided the impact of human factor, has reduced personal error.

Obviously, the useful technique effect of differential pressure flowmeter verification system of the present invention is to have avoided the systematic error of calibrating table data acquisition phase and the mistake that some maloperations cause, and has improved the accuracy of verification result, has improved work efficiency.

Claims (5)

1. differential pressure flowmeter verification system, it is characterized in that: this system comprises industrial computer, differential pressure assay module, electromagnetic flowmeter standard scale and HART converter; The differential pressure assay module comprises data processing module and control module and is built in industrial computer; One end of HART converter connects the built-in HART interface of differential pressure flowmeter transmitter to be examined and determine, and the other end connects the data processing module of differential pressure assay module by computer interface; The electromagnetic flowmeter standard scale is connected with industrial computer by the RS232 data-interface that carries.
2. described differential pressure flowmeter verification system according to claim 1, it is characterized in that: the HART agreement physical signalling that the HART converter can use differential pressure flowmeter to be examined and determine and the RS-232 serial signal of industrial computer be changed mutually.
3. described differential pressure flowmeter verification system according to claim 1, it is characterized in that: data processing module can read the data of differential pressure flowmeter to be examined and determine and electromagnetic flowmeter standard scale and show, wherein, the essential information of differential pressure flowmeter to be examined and determine comprises differential pressure value, current value and the flow percentage in manufacturer's identification code, manufacturer's device type code and device id and the verification process; The essential information of electromagnetic flowmeter standard scale comprises instantaneous delivery and integrated flow.
4. described differential pressure flowmeter verification system according to claim 1, it is characterized in that: data processing module is according to differential pressure value and the electromagnetic flowmeter standard scale aggregate-value of the calibrational capacity point differential pressure flowmeter to be examined and determine of the calibrational capacity point of setting and time each setting of timing acquiring, and the data of collection carried out the processing of error calculating and result of calculation.
5. described differential pressure flowmeter verification system according to claim 1, it is characterized in that: data processing module can calculate and show procedure parameter and the verification result data in the calibrating and preserve, wherein, procedure parameter comprises differential pressure value, current value and the flow percentage of differential pressure flowmeter to be examined and determine, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; The verification result data comprise COEFFICIENT K and the uncertainty of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation.
CN201210577953.5A 2012-12-27 2012-12-27 Differential pressure flowmeter verification system CN102997979B (en)

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CN102997979B CN102997979B (en) 2015-08-19

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN104266731A (en) * 2014-10-21 2015-01-07 中山欧麦克仪器设备有限公司 System for verifying electromagnetic flowmeter
CN105136251A (en) * 2014-06-09 2015-12-09 浙江海洋学院 Method for detecting air mass flowmeter
CN107764360A (en) * 2016-08-23 2018-03-06 国家电投集团科学技术研究院有限公司 Control method, control device and the digital instrument of digital instrument
CN108318110A (en) * 2017-12-25 2018-07-24 中核北方核燃料元件有限公司 A kind of minute gas meter proof calibrating installation
CN109506745A (en) * 2018-12-17 2019-03-22 杭州晶锐仪器仪表有限公司 A kind of calibration method of Ultrasonic Wave Flowmeter analog output module

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105136251A (en) * 2014-06-09 2015-12-09 浙江海洋学院 Method for detecting air mass flowmeter
CN104266731A (en) * 2014-10-21 2015-01-07 中山欧麦克仪器设备有限公司 System for verifying electromagnetic flowmeter
CN107764360A (en) * 2016-08-23 2018-03-06 国家电投集团科学技术研究院有限公司 Control method, control device and the digital instrument of digital instrument
CN108318110A (en) * 2017-12-25 2018-07-24 中核北方核燃料元件有限公司 A kind of minute gas meter proof calibrating installation
CN109506745A (en) * 2018-12-17 2019-03-22 杭州晶锐仪器仪表有限公司 A kind of calibration method of Ultrasonic Wave Flowmeter analog output module

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