目前压力测试系统普遍采用压电式传感器,但其庞大体积与小口径火炮炮膛的初衷相违背,为此本文设计出一种基于电容充放电变化的压力测试系统-电容测压器。系统基于充放电原理的电容测压器,采用一片msp430芯片作为数字部分控制芯片,对模拟部分进行重新设计。通过实验验证,该方案采样频率高,动态响应好,稳定性好,满足测试要求。 At present, piezoelectric pressure sensors are widely used in pressure testing systems. However, their large size is contrary to the original intention of small bore gun bore. Therefore, this paper designs a pressure test system based on capacitance charge and discharge changes, a capacitive pressure sensor. The system is based on the capacitive charge-discharge principle of the voltage regulator, using a msp430 chip as part of the digital control chip, the analog part of the redesign. Through experimental verification, the program sampling frequency is high, good dynamic response, good stability, to meet the test requirements.