The standard pressure generator,as a pressure measurement standard,is widely used in the verification and calibration of pressure instruments.This article designs a standard pressure generator based on micro flow control,which precisely adjusts the output pressure of the device by controlling the intake and exhaust flow rates.This article includes three parts:overall design,hardware design,and software design,which respectively explain the circuit,gas path,flow control device,software interface,software driver,and software control process of the device.The designed device can automatically gener-ate and stably output a gas standard pressure value by manually inputting the target pressure value through the touch screen,with a maximum pressure of 20 MPa and a pressure accuracy level of 0.05,achieving pressure control automation and improving the efficiency of high-pressure gas medium pressure instru-ment calibration and calibration.
关键词
标准压力发生器/流量控制/压力控制/串级控制
Key words
standard pressure generator/flow control/pressure control/cascade control
维普
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