Airtight container leakage positioning and measuring system based on ultrasonic detection

Abstract

The invention provides an airtight container leakage positioning and measuring system based on ultrasonic detection. A hardware system comprises a main control single-chip microcomputer, an ultrasonictransmitting circuit, an ultrasonic receiving circuit, an audio recognition processing module, and a power supply module; a software platform can achieve ultrasonic transmitting, local oscillation signal generation driving and serial port data transmission through C language. The system is mainly used for detecting gas leakage of a high-pressure sealed container or a pipeline and positioning leakage in the presence of leakage. The system has the main advantages of safety and simplicity in leakage positioning measurement operation, convenience in system use, low device cost, relatively high positioning precision, wide range of measured objects and the like. The system has the advantages of low detection and positioning cost, relatively high precision, small method limitation, universalityand transportability, and huge market promotion and application potential.

Description

technical field [0001] The invention relates to an airtight container leakage location measurement system, in particular to an airtight container leakage location measurement system based on ultrasonic detection, and belongs to the technical field of airtight container leakage ultrasonic detection. Background technique [0002] With the continuous development of industrial technology, the application of airtight containers and pipelines is deepening and popularizing. Gas leak detection technology has become a new field integrating multiple disciplines and technologies. Countries all over the world have invested heavily in this field. Funding to do relevant research and application, and strive to find a safer, more reliable and more convenient leak detection method. [0003] Airtight container is a kind of airtight container, the outside or inside of which is subjected to liquid and gas pressure, so that the container has internal and external differences, and has high requir...

AI Technical Summary

Problems solved by technology

[0013] One is that the bubble method in the prior art is applicable to limited occasions, the follow-up processing is complicated, and the solubility of the gas is ignored. When the pressure in the cavity of the tested part is less than the critical pressure, no bubbles can be generated, even if the pressure in the cavity of the tested part is greater than or equal to the critical pressure , or the bubbles cannot be generated because impurities in the liquid block the leak hole, or the bubbles take a long time to be found within the observation time, or the bubble volume is too small or the bubbling time is too short to be observed by the naked eye, causing errors. The gas accumulated on the uneven surface of the object to be inspected will float out and generate bubbles, which may also easily cause misjudgment

[0014] Second, the air pressure method in the prior art can only roughly judge whether there is a leak, and cannot accurately locate the leak location, and is easily affected by temperature. When there is a higher sensitivity requirement, the leak detection time needs to be extended, and the leak detection cycle is also extended accordingly. When the temperature is lower than the leak point temperature of water vapor, the water vapor in the compressed gas will condense into water, which will reduce the internal pressure of the tested part, and the leak point sensor is required to correct the pressure error

[0015] The third is that the halogen method detection in the prior art must be carried out in a ventilated environment. The halogen gas is heavier than the air, which is prone to false phenomena. The halogen gas is not safe. The testing personnel must take protective measures, and the halogen gas needs to be recovered after the detection is completed.

The prior art helium mass spectrometry instrument itself and helium are expensive and economical

[0016] Fourth, the ultrasonic method in the existing technology still has poor hardware compatibility, high cost, poor matching, and is susceptible to interference from various aspects. The operation is cumbersome, the running speed is slow, the program robustness is not good, and the efficiency is not high. There are various problems in the method, and the method has great limitations, which is not conducive to popularization and application.

[0017] Fifth, the ultrasonic leak detection of gas leakage in the prior art is not safe and simple to operate, the system is troublesome to use, the device cost is high, the positioning accuracy is relatively low, and the range of the measured object is very narrow, especially the determination of the leak location measurement of the airtight container Inaccurate, the method of leak location measurement for airtight containers based on ultrasonic testing is not robust and efficient

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