高压气瓶非接触压力测量系统设计

Design of Contactless Pressure Measurement System for High Pressure Cylinders

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,运用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。

Under normal conditions,the pressure of gas cylinders is measured at the opening on the outlet pipe of the gas cylinders.For the high-pressure gas cylinders in long-term storage,there is a hidden danger of pressure leakage at the opening part.The contactless pressure measurement system of the cylinder is analyzed and studied to overcome the problem of open pressure leakage of the cylinder.Based on the deformation of the cylinder wall under pressure,the calculation model of the strain variable relationship between the cylinder wall and internal pressure is established through the key technology of strain measurement of the cylinder wall.The relevant data parameters under different temperatures and pressures are accumulated through multiple experiments.The pressure formula with temperature compensation is fitted to the data model,and the portable tester is programmed to realize the contactless pressure measurement of the high-pressure gas cylinder under the condition of not contacting the medium,and it meets the application demands for random measurement of gas cylinders during long term storage under high pressure conditions.