一、前言差压产生装置在工业过程测量和控制应用中他用最广。这类装置的基本原理是准确测量液流中产生的差压,藉以确定流量和流速。但是,通过电输出形式给出良好重复性和准确度的一些差压装置比较昂贵。双线电阻探测器式水压计虽具有重复性好,结构简单,标准方便 I. Introduction Differential pressure generating device is the most widely used in industrial process measurement and control applications. The basic principle of this type of device is to accurately measure the differential pressure generated in the liquid flow, in order to determine the flow rate and flow rate. However, some differential pressure devices that give good repeatability and accuracy through the electrical output are more expensive. Although the double-wire resistance detector type piezometer with good repeatability, simple structure, the standard convenience