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Leak detection method for a floating air bag

A technology of leak detection and air bag, which is applied in the field of leak detection, can solve the problems of gas leakage due to the stress concentration of the bag body, affect the service life of the aerostat, and cannot realize accurate detection, etc., and achieve low cost, novel test principle and short cycle Effect

Inactive Publication Date: 2015-10-21
滁州汽车与家电技术及装备研究院
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AI Technical Summary

Problems solved by technology

The buoyancy of the aerostat comes from the light gas such as helium in the capsule. The leaks on the surface of the airbag will cause abnormal stress concentration and gas leakage in the capsule, and will greatly affect the service life of the aerostat.
[0003] In the prior art, there are mainly air bubble detection methods, direct pressure detection methods and flow detection methods for the testing of floating air bags. These existing methods directly test the temperature and pressure of the system, and the test results are greatly affected by the external environment. , often cannot rely on the test results to judge whether the system is leaking, the method itself is costly and the cycle is long, and the accurate detection of the leakage cannot be realized

Method used

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  • Leak detection method for a floating air bag

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Embodiment Construction

[0027] The leakage detection method of the floating air bag in the present embodiment is carried out in the following steps:

[0028] Step 1, set the initial state as follows: airbag temperature Tc is 20°C, airbag pressure Pc is 100kPa, airbag volume Vc is 10m 3 , the gas in the airbag is air, helium or hydrogen.

[0029] Step 2, by controlling the flowmeter to make the airbag leak quantitatively into the external gas tank, set the gas volume of the quantitative leakage as ΔV 0 , and the leaked gas volume of the airbag obtained by detection is ΔV 0 After that, the airbag pressure is P 0 , the airbag temperature is T 0 ;Set the gas volume of quantitative leakage as ΔV 0 , and ΔV 0 Not more than 1m 3 .

[0030] Step 3, in the same initial state as Step 1, change the gas volume of the quantitative leakage as ΔV 1 ,...,ΔV n , and ΔV 0 ≠ΔV 1 ≠…≠ΔV n , repeat step 2, and obtain the leaked gas volume of the airbag as ΔV 1 ,...,ΔV n After that, the airbag temperature cor...

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Abstract

The invention discloses a leak detection method for a floating air bag. The leak detection method for the floating air bag is characterized in that the air bag is controlled to leak quantitatively at different leakage rates, an equation: deltaV=alpha0+alpha1(T / P)+alpha2(T / P)2+ ... + alphan(T / P)n, is built according to an ideal air state equation; the leak detection method for the floating air bag comprises: detecting air bag pressure P and air bag temperature T in any state, and then working out the volume deltaV of leak air according to the equation. According to the leak detection method for the floating air bag, leakage can be judged in a simple and rapid manner, and the leakage rate can be concretely detected.

Description

technical field [0001] The invention relates to a leakage detection method, more specifically to a leakage detection method of a floating air bag. Background technique [0002] As a kind of aircraft that relies on buoyancy to lift into the air, aerostats have unique advantages such as low cost, long time in the air at a fixed point, large load capacity, low noise, low energy consumption, good safety, and high cost-effectiveness. , remote sensing communication, tourism, emergency rescue and many other civilian fields have a wide range of uses and good prospects. The buoyancy of the aerostat comes from the light gas such as helium in the capsule. The leaks on the surface of the airbag will cause abnormal stress concentration and gas leakage of the capsule, and will greatly affect the service life of the aerostat. [0003] In the prior art, there are mainly air bubble detection methods, direct pressure detection methods and flow detection methods for the testing of floating ai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/32
Inventor 赵韩朱仁胜彭继友李军鹏钱立军黄康汪洪波赵红玲孙程张月沈健朱武
Owner 滁州汽车与家电技术及装备研究院
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