利用热敏基元进行温度补偿的压力传感器的压力控制装置  

Pressure controlling device for pressure transducers using the thermal-sensing elements for temperature compensation

作　　者：孙以材[1] 张艳辉[1] 蒋源峰[1] 

机构地区：[1]河北工业大学

出　　处：《传感器世界》2003年第12期13-18,共6页Sensor World

摘　　要：本文介绍了一种压力自动控制装置。外加电压通过热敏基元的兴奋作用对压力传感器进行热灵敏度补偿,压力传感器的输出信号再经热敏基元的差动跨麻痹作用得到热零点漂移补偿,并经二级运放电路放大到满量程达4V～5V,然后再传输到比较控制电路。被放大的压力输出信号与分压电路的两个高、低压力限的基准电压分别输入到差动放大器进行比较,比较后输出信号去控制三极管的通断,从而控制继电器的工作状态,完成对压力的自动调节。An automatic control device for pressure are presented. By using the excited function of a thermal-sensing element to compensate the thermal sensitivity drift, the applied voltage activates the pressure sensor. The largest output signal is amplified to 5V, the pressure signal after compensating the thermal offset drift by using the differential paralysis function of another thermal-sensing element and the reference voltage of a dividing-circuit which are set for, setting for high and low pressure limits, are respectively inputted to a differential amplifier to compare. Thus, its output controls the make or break of triodes, whereby, controls the active mode of relies and complete the automatic regulation of pressure.

关 键 词：压力传感器 热敏基元 温度补偿 热零点 热灵敏度漂移 压力自动控制装置 差动放大器 

分 类 号：TP212.12[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]