CN102997979B - Differential pressure flowmeter verification system - Google Patents
Differential pressure flowmeter verification system Download PDFInfo
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- CN102997979B CN102997979B CN201210577953.5A CN201210577953A CN102997979B CN 102997979 B CN102997979 B CN 102997979B CN 201210577953 A CN201210577953 A CN 201210577953A CN 102997979 B CN102997979 B CN 102997979B
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Abstract
For overcoming the problems such as the comparatively 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, comprises industrial computer, differential pressure assay module, electromagnetic flowmeter standard scale and HART converter; Differential pressure assay module comprises data processing module and control module and is built in industrial computer; One end of HART converter connects waits to examine and determine the built-in HART interface of differential pressure flowmeter transmitter, and the other end connects the data processing module of differential pressure assay module by computer interface; Electromagnetic flowmeter standard scale is connected with industrial computer by the RS232 data-interface carried.The Advantageous Effects of differential pressure flowmeter verification system of the present invention is that of avoiding the mistake that the systematic error of calibrating table data acquisition phase and some maloperations cause, and improves the accuracy of verification result, improves work efficiency.
Description
Invention field
The present invention relates to differential pressure flowmeter Calibration Technology, be related specifically to a kind of differential pressure flowmeter verification system.
Background technology
Prior art differential pressure flowmeter verification system treats by voltage signal acquisition integrating instrument the current output signal examining and determine the 4-20mA that differential pressure flowmeter (hereinafter referred to as calibrating table) transmitter exports to carry out gathering and calculate the differential pressure value obtaining calibrating table.To be voltage signal acquisition integrating instrument to show by a current-to-voltage converting circuit current signal that transmitter exports to its detailed process by calibrating be converted to voltage signal, then, by the built-in analog-to-digital conversion module AD(of voltage signal acquisition integrating instrument hereinafter referred to as A/D module) voltage signal is converted to digital signal, again by algorithm process, the current differential pressure value of calibrating table can be obtained.The instantaneous delivery value of the standard deviation pressure type flowmeter in the differential pressure value of the calibrating table detected and calibration system is compared, the calibrating data such as the linearity, reproducibility error and efflux coefficient needed for demarcation can be obtained by repeatedly identical test.Because calibrating table transmitter exists the error of calculation when processing instantaneous delivery and output current value, the current value that differential pressure galvanometer exports also not exclusively is directly proportional to its instantaneous delivery, may cause gauging error thus.The hardware error that the current-to-voltage converting circuit that the current signal exported owing to calibrating to be shown transmitter is again converted to voltage signal exists, and the error caused by A/D module sampling resolution, further increase gauging error.In addition, need testing person manually to input each parameter and data in computation sheet in verification process, also easily there is misoperation in not only trivial operations, thus causes verification result mistake.Obviously, prior art differential pressure flowmeter verification system also exists the problems such as the comparatively large and trivial operations of gauging error.
Summary of the invention
For overcoming the problems such as the comparatively 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; Differential pressure assay module comprises data processing module and control module and is built in industrial computer; One end of HART converter connects waits to examine and determine the built-in HART interface of differential pressure flowmeter transmitter, and the other end connects the data processing module of differential pressure assay module by computer interface; Electromagnetic flowmeter standard scale is connected with industrial computer by the RS232 data-interface carried.
Further, the RS-232 serial signal of the HART Protocol physical signal and industrial computer waiting to examine and determine differential pressure flowmeter use can be changed by the HART converter of differential pressure flowmeter verification system of the present invention mutually.
Further, the data processing module of differential pressure flowmeter verification system of the present invention can read the data of waiting to examine and determine differential pressure flowmeter and electromagnetic flowmeter standard scale and show, wherein, treat that the essential information of calibrating differential pressure flowmeter comprises differential pressure value, current value and flow percentage in manufacturer's identification code, manufacturer's device type code and device id and 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 waits according to the calibrational capacity point of setting and the calibrational capacity point of each setting of time timing acquiring differential pressure value and the electromagnetic flowmeter standard scale aggregate-value of examining and determine differential pressure flowmeter, and the data gathered is carried out to the process of error calculation and result of calculation.
Further, the data processing module of differential pressure flowmeter verification system of the present invention can calculate and the procedure parameter shown in calibrating and verification result data preserving, wherein, procedure parameter comprises to be waited to examine and determine the differential pressure value of differential pressure flowmeter, current value and flow percentage, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; 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 Advantageous Effects of differential pressure flowmeter verification system of the present invention is that of avoiding the mistake that the systematic error of calibrating table data acquisition phase and some maloperations cause, and improves the accuracy of verification result, improves work efficiency.
Accompanying drawing explanation
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; Differential pressure assay module comprises data processing module and control module and is built in industrial computer; One end of HART converter connects waits to examine and determine the built-in HART interface of differential pressure flowmeter transmitter, and the other end connects the data processing module of differential pressure assay module by computer interface; Electromagnetic flowmeter standard scale is connected with industrial computer by the RS232 data-interface carried.
The RS-232 serial signal that the HART converter of differential pressure flowmeter verification system of the present invention can wait to examine and determine HART Protocol physical signal that differential pressure flowmeter uses and industrial computer be changed mutually, and its data processing module can read the data of waiting to examine and determine differential pressure flowmeter and electromagnetic flowmeter standard scale and show; Wherein, treat that the essential information of calibrating differential pressure flowmeter comprises differential pressure value, current value and flow percentage in manufacturer's identification code, manufacturer's device type code and device id and verification process; 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 waits according to the calibrational capacity point of setting and the calibrational capacity point of each setting of time timing acquiring differential pressure value and the electromagnetic flowmeter standard scale aggregate-value of examining and determine differential pressure flowmeter, and the data gathered is carried out to the process of error calculation and result of calculation; Can calculate and the procedure parameter shown in calibrating and verification result data preserving, wherein, procedure parameter comprises differential pressure value, current value and the flow percentage of waiting to examine and determine differential pressure flowmeter, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; 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 by HART converter and waits to examine and determine differential pressure flowmeter, and the RS232 data-interface that electromagnetic flowmeter standard scale is carried by it is connected to industrial computer.Open industrial computer and read the essential information of waiting to examine and determine differential pressure flowmeter, comprising manufacturer's identification code, manufacturer's device type code and device id.Wait to industrial computer input the parameter that the calculated description examining and determine differential pressure flowmeter provides and set calibrational capacity point and time, the calibrating directive document of described calculated description for working out according to the design parameter of differential pressure flowmeter.After regulating pipeline flow value, the differential pressure value and electromagnetic flowmeter standard scale aggregate-value of the calibrational capacity point of each setting being treated to calibrating differential pressure flowmeter gather and carry out error calculation by differential pressure flowmeter verification system of the present invention, after all flow points have been demarcated, differential pressure flowmeter verification system of the present invention can calculate and preserve verification result data, comprises the COEFFICIENT K and uncertainty etc. of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation.Differential pressure flowmeter verification system of the present invention is from treating that calibrating differential pressure flowmeter gathers current signal and detects, but directly read differential pressure value (because differential pressure flowmeter transmitter directly can export parameters or real time data from built-in HART interface from the HART interface waiting to examine and determine differential pressure flowmeter transmitter, so the transmitter of differential pressure flowmeter is directly connected with computing machine by a HART converter, then the consistent differential pressure value of display current with differential pressure flowmeter can directly be obtained at computing machine), so just completely avoid a series of errors produced in prior art differential pressure flowmeter verification system signal acquisition process.In addition, differential pressure flowmeter verification system of the present invention can show procedure parameter in verification process and verification result data in real time and preserve, wherein, procedure parameter comprises to be waited to examine and determine the differential pressure value of differential pressure flowmeter, current value and flow percentage, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; Verification result data comprise COEFFICIENT K and the uncertainty of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation.Further, adopt differential pressure flowmeter verification system of the present invention, decrease the manual operation of operating personnel, system completes all data acquisition operations automatically, avoids the impact of human factor, decreases personal error.
Obviously, the Advantageous Effects of differential pressure flowmeter verification system of the present invention is that of avoiding the mistake that the systematic error of calibrating table data acquisition phase and some maloperations cause, and improves the accuracy of verification result, improves work efficiency.
Claims (3)
1. a differential pressure flowmeter verification system, is characterized in that: this system comprises industrial computer, differential pressure assay module, electromagnetic flowmeter standard scale and HART converter; Differential pressure assay module comprises data processing module and control module and is built in industrial computer; One end of HART converter connects waits to examine and determine the built-in HART interface of differential pressure flowmeter transmitter, and the other end connects the data processing module of differential pressure assay module by computer interface; Electromagnetic flowmeter standard scale is connected with industrial computer by the RS232 data-interface carried, and wherein, the RS-232 serial signal of the HART Protocol physical signal and industrial computer waiting to examine and determine differential pressure flowmeter use can be changed by HART converter mutually; Data processing module can read the data of waiting to examine and determine differential pressure flowmeter and electromagnetic flowmeter standard scale and show, wherein, treat that the essential information of calibrating differential pressure flowmeter comprises differential pressure value, current value and flow percentage in manufacturer's identification code, manufacturer's device type code and device id and verification process; The essential information of electromagnetic flowmeter standard scale comprises instantaneous delivery and integrated flow.
2. differential pressure flowmeter verification system according to claim 1, it is characterized in that: data processing module waits to examine and determine differential pressure value and the electromagnetic flowmeter standard scale aggregate-value of differential pressure flowmeter according to the calibrational capacity point of setting and the calibrational capacity point of each setting of time timing acquiring, and the data gathered is carried out to the process of error calculation and result of calculation.
3. differential pressure flowmeter verification system according to claim 1, it is characterized in that: data processing module can calculate and the procedure parameter shown in calibrating and verification result data preserving, wherein, procedure parameter comprises to be waited to examine and determine the differential pressure value of differential pressure flowmeter, current value and flow percentage, and the instantaneous delivery of electromagnetic flowmeter standard scale and integrated flow; Verification result data comprise COEFFICIENT K and the uncertainty of efflux coefficient, the linearity, repeatability, reflected measurement Media density and differential pressure value relation.
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| CN201210577953.5A CN102997979B (en) | 2012-12-27 | 2012-12-27 | Differential pressure flowmeter verification system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN107764360B (en) * | 2016-08-23 | 2019-10-11 | 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 |
| CN106679770B (en) * | 2016-11-22 | 2024-02-27 | 重庆川仪自动化股份有限公司 | Mass calibration system and method for mass flowmeter |
| US11105664B2 (en) | 2017-03-23 | 2021-08-31 | Honeywell International Inc. | Apparatus and method for creating inferential process flow measurements using flow restrictor and upstream and downstream pressure measurements |
| 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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