Test method and measuring device for acoustic delay of gas ultrasonic flowmeter

Abstract

A test method and a measuring device for acoustic delay of a gas ultrasonic flowmeter relate to the technology for detecting ultrasonic wave propagation time of ultrasonic flowmeters, in particular to the technology for measuring time errors of electronic circuit signal propagation delay time, transducer signal delay time, signal sampling point delay time and signal cable delay time, and are suitable for sound velocity detection of various diameters of ultrasonic flowmeters. The test method for the acoustic delay is a measuring method for contrasting and proving acoustic delay data of a detected meter through a detected high-accuracy standard gas sound velocity measuring device, a computer and upper computer software according to standard sound velocity of a place where the detected gas ultrasonic flowmeter is located.

Description

technical field [0001] A gas ultrasonic flowmeter sound delay testing method and measuring device, relating to the detection technology of the ultrasonic wave propagation time of ultrasonic flowmeter instruments, especially related to the detection of electronic circuit signal transmission delay time, transducer signal delay time, and signal sampling point lag Time and signal cable delay time measurement time error technology is suitable for sound velocity detection of ultrasonic flowmeters with various calibers. Background technique [0002] The sound delay measurement of the gas ultrasonic flowmeter is to detect the delay time (microsecond level) of the sound velocity sound signal sampling inherently involved in the operation of the flowmeter itself. The accuracy of the detection will directly affect the final quality of the instrument manufacturing. [0003] At present, the traditional "mapping method" is used at home and abroad to measure the sound delay of the gas ultra...

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Problems solved by technology

[0003] At present, the traditional "mapping method" is used at home and abroad to measure the sound delay of the gas ultrasonic flowmeter. This method takes a long time to test and has high environmental requirements. It is difficult to control the temperature and humidity of the test point, resulting in the sound delay detection data. Unstable; in addition, the transducer detected in the test box must be installed in the sound channel of the instrument under test, and the standard sound path of the three-coordinate measurement will cause installation errors, which will affect the measurement of the sound delay to a certain extent precision

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