高精度压力测控系统的试验研究  

Experimental study on high precision pressure measure and control system

作　　者：俞志根[1] 

机构地区：[1]湖州职业技术学院机电工程分院,浙江湖州313000

出　　处：《电子技术应用》2008年第11期38-40,共3页Application of Electronic Technique

摘　　要：介绍了一种高精度压力测控系统。该系统以 STC89C51单片机为控制核心,由前端小信号压力检测与滤波电路和移相调压电路等组成。针对压阻传感器存在的非线性误差,从软件和硬件两方面进行误差修正和补偿,以保证测量压力的精度。同时,采用积分分离 PID 控制算法和最优控制参数整定方法以达到提高控制压力精度的目的。Presented a high precision pressure measurement and control system which consists of STC89C51 as kernel, pressure detecting imput and filtering circuit, and the triggering pulse output circuit of thrusters. Because the characteristic curve of the press-resistance sensor is nonlinear, special current type pressure detecting circuit, digital filter and the scaling function derived by use of a curve fitting scheme were used to compensate the nonlinear measurement error of the press-resistance sensor in order to guarantee the pressure measurement precision. Meanwhile, the integration separation PID control algorithm and the optimization method of control parameters were adopted to improve the pressure control precision.

关 键 词：高精度 压力测控 压力传感器 PID控制算法 

分 类 号：TP274.5[自动化与计算机技术—检测技术与自动化装置] TP368.1[自动化与计算机技术—控制科学与工程]