Gas-tight test system leakage compensation apparatus and compensation process

Abstract

The invention discloses a compensating device used for air-tight tester system leakage. A valve seat and a valve core form a gas storage chamber which is communicated with a test air passage; the compensation device also comprises a controller, a servo motor and a linear motion mechanism; the controller outputs the driving voltage of the servo motor according to the leakage speed of the tester; the linear motion mechanism is respectively connected with the output shaft of the servo motor and the input terminal of the valve core and converts the rotation motion of the servo motor into the linear motion of the valve core corresponding to the valve seat. The compensating device of the invention can actively compensate the system leakage of the tester, counteracts the system leakage of the tester, reduces the measurement error, and improves the detection precision. The invention also discloses a compensating method for the air-tight tester leakage based on the compensating device.

Description

technical field [0001] The invention relates to the field of air tightness testing instruments, in particular to a leakage compensation device and compensation method for an air tightness tester system. Background technique [0002] Products and equipment that store gas or use gas as a working medium usually need to be tested for air tightness. If the airtightness of the product or equipment is not good, it will directly affect its working performance, and sometimes even cause safety accidents. [0003] The so-called airtightness is the sealing degree of the gas in the sealed chamber, that is, the degree of gas leakage. The so-called airtightness test is aimed at products or equipment with incompressible sealed chambers (such as wine bottles), to detect whether the gas in the sealed chamber leaks; usually, the test piece is first inflated with a high-pressure air source (by the valve) Control the size of the inflation and the amount of inflation), and then judge whether th...

AI Technical Summary

Problems solved by technology

However, there are many components in the gas circuit of the tester, and there is inevitably system leakage; improving the sealing of the tester can reduce system leakage to a certain extent and reduce measurement errors; however, it is limited by factors such as manufacturing process and test cost , the sealing performance of the tester cannot be improved infinitely, so the system leakage of the tester cannot be finally eliminated

Due to the influence of system leakage, the detection accuracy of the existing tester is not ideal, and sometimes even leads to misjudgment

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