一种双电桥非线性校正方法  

Two-bridge of non-linear correction circuit

作　　者：王振强[1] 张怀忠[1] 张冬梅[1] 司良友[1] 

机构地区：[1]中国电子科技集团公司第四十九研究所,哈尔滨150001

出　　处：《信息技术》2008年第12期116-118,共3页Information Technology

摘　　要：传感器的非线性校正,通常需要设计一个非线性校正电路来试验。现设计了一组双电桥电路,用于铂电阻温度传感器数显电路的非线性校正。由双电桥电路输出两组电压,其中一组提供随被测温度变化而变化的信号电压送给A/D变换电路的信号输入端,另一组是带有非线性补偿的基准电压送给A/D变换电路的基准电压输入端,调整其负反馈的大小,使温度显示器显示温度的非线性误差在-50℃～199.9℃,范围仅小于0.1℃。Sensor non-linear correction usually needs to design a non-linear correction circuit to test. This paper designs a system of Two-bridge circuit for platinum resistance temperature sensor in the number of nonlinear correction circuit. Two-bridge from the two groups output voltage circuit, one provides a measured temperature change with changes in the voltage signal given to A/D converter signal input, the other one is a non-linear voltage sent to the base compensation To the A/D converter reference voltage input, adjusting the size of its negative feedback so that the temperature monitors showed that the temperature in the non-linear error - 50℃ - 199.9 ℃, only the scope of less than 0.1 ℃.

关 键 词：温度传感器 双电桥电路 非线性 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]