负温条件下激光位移传感器的标定  

Calibrating the laser displacement sensor under the temperatures below 0 ℃

作　　者：杜玉霞[1] 马巍[1] 赵淑萍[1,2] 张泽[1] 明姣[1] 

机构地区：[1]中国科学院,寒区旱区环境与工程研究所,冻土工程国家重点实验室,甘肃兰州730000 [2]南京师范大学地理科学学院,江苏南京210023

出　　处：《冰川冻土》2016年第6期1583-1591,共9页Journal of Glaciology and Geocryology

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB026106);中国科学院寒区旱区环境与工程研究所人才基金项目(Y251C11001);冻土工程国家重点实验室自主课题(Y252K61001);国家自然科学基金项目(41023003)资助

摘　　要：在使用激光位移传感器测试冻土位移中,由于测试现场环境条件恶劣,厂家给出的传感器线性度会降低,因此,需要对所有传感器在使用前应模拟使用时的环境条件重新进行标定.为验证激光位移传感器在冻土测试中的适用性,依据德国森萨帕特FT-50 RLA220型激光位移传感器的结构、使用特点、技术指标,设计了由控温箱、标定支架、激光位移传感器、量块及数据采集装置组成的标定的装置,进行了不同负温条件下对激光位移传感器标定,并依据标定试验结果进行拟合参数修正,得到不同环境温度下的试验结果的线性度和迟滞特性.试验结果表明:不同的环境温度下,两个激光位移传感器与标准厂家测试曲线存在差异,不同负温条件下标定的两个激光位移传感器的拟合优度R2分别为0.999和1;线性度最大值分别为0.88%FS和0.32%FS.When the laser displacement sensor is used in frozen soil experiment, the linearity will decrease because of the worse environment condition. Therefore, all sensors must be calibrated in the simulated environment conditions before a test. In order to verify the applicability of the laser displacement sensor in frozen soil experiment, according to the structures, features, technical index of the FT-50 RLA220 laser displacement sensor made by German SensoPart, a calibration device was designed, which is composed of temperature control box, calibration holder, FT-50 RLA220 laser displacement sensor, gage block and data acquisition device. The outputs of two displacement sensors under different temperatures and displacement points had been recorded. Based on the calibration results, the fitting parameters of sensors under different temperatures were corrected. The experimental results also show that calibration goodness-of-fit of the two laser displacement sensors are 0.999 and 1, respectively, with the maximum linearity of 0.88%FS and 0.32%FS, respectively.

关 键 词：低温测量 激光位移传感器 标定 线性度 迟滞特性 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置] P642.14[自动化与计算机技术—控制科学与工程]