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针对传统全静压试验器使用不便的问题,设计了基于无线手持终端的新型全静压试验器。该试验器的主控检测软件运行平台为无线手持终端,控制核心为STM32F103RCT6单片机。全、静压的输出采用模拟信号驱动的比例阀控制;基于Sallen-Key型低通滤波器设计了全、静压传感器信号的采集电路,并计算了具有巴特沃斯滤波器特性的元件参数。该试验器操作简单,适合外场使用。
Aiming at the inconvenience of using traditional static pressure tester, a new type of static tester based on wireless handheld terminal is designed. The tester’s main control software testing platform for wireless handheld terminals, control core STM32F103RCT6 microcontroller. The output of full and static pressure is controlled by the analog signal-driven proportional valve. The acquisition circuit of full and static pressure sensor signal is designed based on Sallen-Key low-pass filter, and the component parameters with Butterworth filter characteristics are calculated. The tester is simple, suitable for field use.