高压气瓶非接触压力测量系统设计

Design of non-contact pressure measurement system for high pressure cylinders

摘要:

常规状态下气瓶压力测量，在气瓶出口管路上开口进行引压测量，对于高压气瓶在长期贮存的情况下，开口引压存在开口部位压力泄漏的隐患。为克服气瓶开口引压泄漏问题，对气瓶非接触压力测量系统进行分析研究，基于气瓶壁在压力下产生形变的情况，通过对气瓶壁进行应变测量关键技术，建立气瓶壁的应变量与内部压力之间的关系计算模型，经多次实验验证，积累不同温度及压力下的相关数据参数，通过数据模型拟合具有温度补偿的压力计算公式，通过编程写进便携式测试仪，实现对高压气瓶在不接触介质的情况下非接触压力测量的目的，并满足了气瓶在高压下进行长期贮存时随机测量的应用需求。

Abstract:

Under normal conditions, the pressure of gas cylinder is measured at the opening of the gas cylinder outlet pipe. For the high-pressure gas cylinder in long-term storage, there is a hidden danger of pressure leakage at the opening part. In order to overcome the problem of open pressure leakage of the cylinder, the non-contact pressure measurement system of the cylinder was analyzed and studied. Based on the deformation of the cylinder wall under pressure, the calculation model of the relationship between the strain variable of the cylinder wall and the internal pressure was established through the key technology of strain measurement of the cylinder wall. The relevant data parameters under different temperatures and pressures were accumulated through multiple experiments. The pressure formula with temperature compensation is fitted to the data model and programmed into the portable tester to realize the non-contact pressure measurement of the high-pressure gas cylinder without contact with the medium, and meet the application demand of random measurement when the gas cylinder is stored under high pressure for a long time.