摘要
距离是影响热红外测温精度的主要因素。为研究不同距离下不同热源强度的热红外测温精度,设计野外实验,布设460K和505K两个热源温度,分别在20m的距离以间隔为1m的测温距离采集温度数据,通过函数拟合,分析不同距离下测温值与真实值之间的变化关系。结论如下:1)随着距离的增加,红外测温值呈现先急剧下降,之后逐渐平缓至某一稳定状态的趋势,且当热源温度越高,达到这一稳定状态的距离就越长。2)通过比较多项式和指数拟合函数的相关系数,提出了基于指数函数的温度-距离拟合关系,相关系数最大为0.999。3)依据温度变化速率提出温度-距离的分段数学模型对测温数据进行误差补偿,经过补偿后红外测温值与真实值最大相对误差仅为0.59%。
In this study,field experiments were designed to determine the accuracy of thermal infrared temperature with different intensity heat sources at different distances.Source temperatures of two different heat intensities(460 K and 505 K)were set up,and temperature data were collected at distances ranging from 1-20m using a sampling interval of 0.5m.Furthermore,the relationship between the measured temperature and the actual value was analyzed,and the following conclusions were reached:1)With an increase in distance,the infrared temperature value declined sharply at first,and then gradually became stable;the higher the temperature of the heat source,the longer the distance required to reach the stable state.2)By comparing the correlation coefficients of polynomials and the exponential fitting function,a temperature-distance fitting relationship based on the exponential function is proposed;the maximum correlation coefficient is 0.999.3)The temperature-distance segmentation mathematical model is given based on the temperature change rate used to compensate the temperature measurement data;the maximum relative error between the infrared temperature measurement and the true value was only 0.59%after compensation.
作者
杜玉玺
胡振琪
葛运航
黄华
陈瑞涛
汪勇
王志萌
DU Yuxi;HU Zhenqi;GE Yunhang;HUANG Hua;CHEN Ruitao;WANG Yong;WANG Zhimeng(Institute of Land Reclamation and Ecological Restoration,China University of Mining and Technology(Beijing),Beijing 100083,China;College of Geoscience and Surveying Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China)
出处
《红外技术》
CSCD
北大核心
2019年第10期976-981,共6页
Infrared Technology
基金
国家自然科学基金项目“基于温度探测的煤矸石山自燃监测原理与方法”(41371502)
关键词
红外热像仪
测温距离
指数模型
误差修正
温度补偿
thermal imager
distance of temperature measurement
exponential model
error correction
temperature compensation
