一种微流量控制原理的标准压力发生器设计  

Design of a standard pressure generator with micro flow control principle

作　　者：关卫军 边松岩 路宗敏 王爱华 GUAN Weijun;BIAN Songyan;LU Zongmin;WANG Aihua(Shaanxi Institute of Metrology,Shaanxi Xi′an 710100,China)

机构地区：[1]陕西省计量科学研究院,陕西西安710100

出　　处：《工业仪表与自动化装置》2024年第4期42-46,共5页Industrial Instrumentation & Automation

摘　　要：标准压力发生器作为压力计量标准器被广泛应用于压力仪表的检定和校准中。该文设计了一种基于微流量控制的标准压力发生器,通过对进气、泄气流量控制的方式实现对装置输出压力的精确调节。该文内容包含总体设计、硬件设计和软件设计三部分,分别对装置的电路、气路、流量控制装置、软件界面、软件驱动以及软件控制流程等作了阐述。设计的装置可通过触屏人工输入目标压力值自动发生并稳定输出一个气体标准压力值,压力最高可达25 MPa,压力精度等级可以达到0.05级,实现了压力控制自动化,提高了高压气介质压力仪表检定和校准效率。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 generate 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 instrument 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 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置] TH812[自动化与计算机技术—控制科学与工程]