Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages

Abstract

The invention discloses batch calibration equipment and a batch calibration method for intelligent pointer-type pressure gages. The batch calibration equipment comprises a horizontal calibration platform, a horizontal testing pipe, a plurality of quick connectors for being installed on a plurality of calibration pressure meters respectively, two image acquisition devices which are located in front of the horizontal calibration platform, an image processing device, a pressurization device and a pressure regulation device which regulates pressure in the horizontal testing pipe. The batch calibration method comprises the following steps of: firstly, doing a preparation work before calibration; secondly, inputting and matching models of the pressure gages to be calibrated; thirdly, obtaining data of dial plate templates; fourth, acquiring and dividing images of dial plates, and detecting straight lines at which pointers are located; fifth, matching the templates; sixth, obtaining numberical reading of the pressure meters, and the numberical reading obtaining process comprises the following steps of: obtaining dial plate image information to be processed, matching binocular stereo-vision images and processing the data. The batch calibration equipment disclosed by the invention is reasonable in design, simple and convenient in use and operation, has a good use effect, and calibration efficiency and calibration accuracy of the pointer-type pressure gages are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of instrument calibration, and in particular relates to a batch calibration device and a batch calibration method for intelligent pointer pressure gauges. Background technique [0002] In the process of oil field production and operation, because the elastic sensitive element of the pointer pressure gauge has high mechanical strength, and has the advantages of simple structure, low cost, reliable performance, and convenient maintenance and repair, it has been more and more widely used. With the development of digital electronic technology, some pointer pressure gauges have been replaced by digital instruments, which are highly accurate and easy to read, but when the measured value changes rapidly or fluctuates back and forth, the indication value of the digital instrument will change rapidly accordingly It is not easy to be read; and if the control displays the time interval, the details of the changes in be...

AI Technical Summary

Problems solved by technology

[0003] At present, the verification work of this kind of pointer pressure gauge in China mainly adopts the method of manually observing the pointer reading of the instrument dial for verification. In the actual verification, there are the following defects and deficiencies: First, subjective factors such as observation angle , Observation distance and fatigue strength, etc., the degree error is large and the reliability is not high; second, in the actual calibration, manual pressure is used, so the work efficiency is low and the labor intensity is high; third, the long-term The time reading dial is prone to fatigue, resulting in interpretation errors; fourth, manually verifying the reading of a single meter, the operation process is cumbersome; fifth, manually filling in various verification records and printing the verification certificate, the work efficiency is low

In addition, although there are some automatic calibration systems for pointer pressure gauges on the market, the existing automatic calibration systems for pointer pressure gauges have various defects and deficiencies such as inconvenient operation, low verification efficiency, and inaccurate verification results to varying degrees.

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