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Calibration system and method applied to ultrasonic gas meter

A technology for calibrating systems and gas meters, applied in testing/calibrating devices, measuring devices, instruments, etc., can solve problems such as time-consuming, easily lost pulses, high cost, etc., to improve accuracy, reduce time-consuming, and avoid lost errors Effect

Pending Publication Date: 2021-06-15
CHENGDU QIANJIA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. If the ultrasonic gas meter communicates directly with the test bench through WIFI wireless mode or wired mode, the test bench needs to be refitted. Retrofitting the test bench requires a high cost, and using the wired mode is not applicable in high ground temperature environments
[0005] 2. The communication process of the existing ultrasonic gas meter sampling and test bench takes a long time, and the pulse is easily lost, which affects the judgment accuracy of the test bench

Method used

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  • Calibration system and method applied to ultrasonic gas meter

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Effect test

Embodiment 1

[0050] This embodiment provides a calibration system applied to an ultrasonic gas meter, including a standard test bench and an ultrasonic gas meter device. The ultrasonic gas meter device includes: a flow acquisition module, a data processing module and an independent pulse generation module;

[0051] The flow collection module collects gas flow rate data in the metering pipeline every t seconds;

[0052] The data processing module formulates a pulse sending strategy according to the current gas flow rate data and the current gas flow level, and at the same time, the independent pulse generating module sends pulses to the standard test bench according to the pulse sending strategy, and the independent pulse generating module and the data processing module run in parallel;

[0053] The standard test bench calculates the measured flow data based on all pulses received during the calibration measurement time. The standard test bench compares the measured flow data with the standa...

Embodiment 2

[0072] A calibration method applied to an ultrasonic gas meter is applied to a calibration system applied to an ultrasonic gas meter in Embodiment 1, comprising the following steps;

[0073] During the calibration measurement time, the gas flow rate data in the metering pipeline is collected every t seconds;

[0074] According to the current gas flow rate data and the current gas flow level, the pulse sending strategy is formulated, and the pulse is sent to the standard test bench according to the pulse sending strategy;

[0075] Calculate the measured flow data based on all pulses received within the calibration measurement time, compare the measured flow data with the standard flow data to obtain the error value of the ultrasonic gas meter, and calibrate the ultrasonic gas meter.

[0076] The standard test bench judges whether the error value of the ultrasonic gas meter is within the preset range,

[0077] If not, send the corresponding standard flow data to the ultrasonic ...

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Abstract

The invention discloses a calibration system and method applied to an ultrasonic gas meter. According to the calibration system and method, a flow collection module collects gas flow velocity data in a metering pipeline once every t seconds; a data processing module formulates a pulse sending strategy according to the gas flow rate data at the current time and the current gas flow grade, meanwhile, an independent pulse generation module sends pulses to the standard test board according to the pulse sending strategy, and the independent pulse generation module and the data processing module run in parallel; the standard test board calculates and obtains measured flow data based on all pulses received within the calibration measurement time, and the standard test board compares the measured flow data with standard flow data to obtain an error value of the ultrasonic gas meter so as to calibrate the ultrasonic gas meter; an independent pulse generation module and a data processing module are introduced to run in parallel; time consumption can be reduced, loss errors can be avoided, the sampling time interval and the pulse trigger threshold value of the grade are set according to the gas flow grade, and the precision of the calibration system is improved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic gas metering, in particular to a calibration system and method applied to ultrasonic gas meters. Background technique [0002] With the increasingly higher requirements for gas metering accuracy in the field of gas metering, ultrasonic gas meters are emerging. Compared with membrane gas meters, ultrasonic gas meters have the advantages of wide measuring range, small size, simple structure, high measurement accuracy, and good stability; however, ultrasonic gas meters are fully electronic and have no word wheels, so they cannot be tested with sonic nozzles The existing ultrasonic gas meter needs to detect the error when it leaves the factory, but the ultrasonic gas meter is not like the traditional membrane gas meter to adjust the measurement error by changing the mechanical gear, but by setting the correction coefficient to adjust the measurement error. Conventional manual acquisition of correc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F25/00
CPCG01F25/15
Inventor 刘勋李中华陈伟明
Owner CHENGDU QIANJIA TECH CO LTD
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