负温条件下激光位移传感器的标定

发布时间：2019-05-23 18:02

【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.
[Abstract]:In the use of laser displacement sensor to test frozen soil displacement, because of the bad environmental conditions in the test site, the linearity of the sensor given by the manufacturer will be reduced, so, It is necessary to re-calibrate the environmental conditions in which all sensors should be simulated before use. In order to verify the applicability of laser displacement sensor in frozen soil test, according to the structure, usage characteristics and technical index of German Sensapat FT-50RLA220 laser displacement sensor, a temperature control box, calibration bracket and laser displacement sensor are designed. The calibration device composed of measuring block and data acquisition device is used to calibrate the laser displacement sensor under different negative temperature conditions, and the fitting parameters are modified according to the calibration test results. The linearity and lag characteristics of the test results at different ambient temperatures are obtained. The experimental results show that the test curves of the two laser displacement sensors are different from those of the standard manufacturers at different ambient temperatures. The goodness of fit R2 of the two laser displacement sensors calibrated at different negative temperatures is 0.999 and 1, respectively. The maximum linearity is 0.88%FS and 0.32% FS, respectively.
【作者单位】：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;南京师范大学地理科学学院;
【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
【分类号】：TP212

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