基于压电式压力传感器的压力容器气密性检测方法

A pressure vessel air-tightness detection method based on a piezoelectric pressure sensor

针对低压条件下压力容器气密性检测中存在的微小泄漏检测易受环境噪声干扰、漏点定位困难、对气体介质具有选择性等问题,提出一种基于压电式压力传感器的压力容器气密性移动式检测方法。利用压电式压力传感器检测压力容器漏孔处产生的气体射流,克服了检测仪器对气体介质的选择性;采用气密性移动检测方式,利用检测用传感器可以接近压力容器器壁外表面的特点和仪表的实时计算能力,克服了环境噪声对检测结果的干扰,同时又提高了气密性检测的灵敏度和漏点定位精度,实现了低压条件下微小泄漏的检测。低压容器气密性检测的测试结果验证了所提方法的可行性和有效性,为压力容器的气密性检测提供了一种新的解决思路。

Detection of small leaks in pressure vessels under low-pressure conditions is subject to interference from environmental noise,difficulty of leak point location and selectivity of the gas medium.In an attempt to solve these problems,we propose a mobile detection method for pressure vessel air-tightness based on piezoelectric pressure sensor.The piezoelectric pressure sensor is used to detect the gas jet generated at the leak in the pressure vessel,which overcomes the problem of selectivity of the detection instrument to the gas medium.The air-tightness movement detection method is adopted,and the detection sensor can be infinitely close to the outer surface of the pressure vessel wall.The characteristics and real-time computing ability of the instrument overcome the interference of environmental noise on the detection results,and at the same time improve the air-tightness detection sensitivity and leak hole positioning accuracy,and also facilitate the detection of small leaks under low-pressure conditions.The test results verify the feasibility and effectiveness of the method and provide a new solution for the air-tightness detection of pressure vessels.