Non-enclosed body leakage detection method and apparatus

Abstract

The invention discloses a non-enclosed body leakage detection method and belongs to the field of gas leakage detection. The method comprises the following steps: covering a non-enclosed body with an absorption mechanism; performing vacuum-pumping on the absorption mechanism to enable negative pressure to be generated in an area covered by the absorption mechanism; and detecting ultrasonic wave signals on the back surface of a covered surface of the non-enclosed body, and according to the ultrasonic wave signals, determining a leakage point position. According to the invention, by use of a vacuum-pumping principle, the problem of leakage detection of the non-enclosed body can be solved, the disadvantages of long inflation and leakage elimination time, low efficiency, large apparatus volume and the like of conventional airtight detection of a large airplane are overcome, the purposes of detection in manufacturing and timely restoration are realized, and real-time performance of leakage detection and restoration is guaranteed. The invention further discloses a non-enclosed body leakage detection apparatus.

Description

technical field [0001] The invention relates to a leakage detection method, in particular to a non-closed body leakage detection method and device, belonging to the field of gas leakage detection. Background technique [0002] Currently, leak testing for non-closed or open structures is performed at the final assembly stage. Large and complex systems, such as aircraft leak detection, have shortcomings such as long inflation and leakage time, which not only greatly increases the manufacturing cycle and cost of the aircraft, but also makes it difficult to directly repair hidden leak points, which seriously restricts the development of large aircraft in my country. It is also difficult to guarantee the quality and reliability of large aircraft. [0003] The traditional ultrasonic gas detection method generally adopts the method of pressurizing air into the container. For the detection of large aircraft, it is not only time-consuming, inefficient, and inaccurate in positioning, ...

AI Technical Summary

Problems solved by technology

However, the present invention can only perform follow-up analysis by generating ultrasonic waves at the leak after inflating the sealed container or when there is high pressure inside the container, and is not suitable for non-closed structures

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