超低温铂电阻传感器及其变换电路的线性参数研究  

Study on linear parameters of ultralow temperature platinum resistor sensor and its conversion circuit

作　　者：王元委 齐娜 吕颖 王明谦 WANG Yuanwei;QI Na;LÜYing;WANG Mingqian(The 49th Research Institute of China Electronics Technology Group Corporation,Harbin 150028,China)

机构地区：[1]中国电子科技集团公司第四十九研究所,黑龙江哈尔滨150028

出　　处：《传感器与微系统》2024年第11期17-19,24,共4页Transducer and Microsystem Technologies

摘　　要：本文重点对超低温(-200℃以下)的传感器测量进行分析研究,针对低温条件测量的温敏特性和变换电路进行系统性研究,根据铂电阻在低温下的特性曲线,利用电路的反馈原理,修正铂电阻的线性参数,按照直线方程给出温度—电压关系时,该线性参数的修正可以有效提高传感器/变换器精度,保证传感器测量超低温环境时,不受铂电阻自身低温非线性带来的弊端,通过试验验证可以得出,传感器在-250~100℃全温区范围内精度可以达到0.95%,保证对低温环境的精确测量。This article focuses on the analysis and research on the measurement of sensors working below the ultralow temperature of-200℃.The temperaturesensitive characteristics and conversion circuit of sensor measured at low temperature are systematically studied.According to the characteristic curve of the platinum resistance at low temperature,the feedback principle of the circuit is used to correct the linear parameters of the platinum resistor,the temperaturevoltage relationship are given according to the linear equation,the correction of this linear parameter can effectively improve the precision of the sensor/converter and ensure that when the sensor measures the ultralow temperature environment,it is not due to the disadvantages of the low temperature nonlinearity of the platinum resistor itself.It can be obtained through test verification that the precision of the sensor can reach 0.95%within the range of-250~100℃in the full temperature area,ensuring accurate measurement of the low temperature environment.

关 键 词：传感器 超低温 非线性 变换电路 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]