Bailey 仪表公司发明了一种压力变送器,它探用了一种固体敏感元件。压力通过单晶硅片的敏感元件,以使探用固态技术制得的扩散硅电阻产生应变。由于电压电阻效应的作用,使被扩散的电阻与戚应应变的变化值是成线性关系的。压电电阻的欧姆数变化直接地转换成毫伏数值,经放大为4～20毫安的直流输出讯号,此讯号的变化与压力是成线性关保的。变送器是双钱制的,二条导线可作为变送器的两个激励源,输出讽号的变速可探用一对同样的导线来实现。 Bailey Instruments invented a pressure transmitter that explored a solid-state sensor. Pressure through the single-crystal silicon sensor so that probing solid state diffusion of silicon resistance obtained strain. Due to the effect of the voltage resistance effect, the resistance to be diffused is linearly proportional to the change in the value of strain. The ohmic changes in the piezoresistor are directly converted to millivolts and amplified to a DC output of 4 to 20 milliamps. The change in signal is linearly proportional to the pressure. Transmitter is double money system, two wires can be used as two transmitter excitation, the output of satirical speed can be explored with a pair of the same wire to achieve.