基于热幅射的耳腔式红外体温计研制

Research and fabrication of ear cavity IR thermometer based on thermal radiation

基于黑体热辐射原理采用MLX90615-DAA专用医用温度测量探头和MSP430主控制器进行温度源数据采集和处理,并应用矫正查表法和两次线性回归校准算法分别计算出温度值和校准温度值,样机和黑体标准器同步进行71例测温对比实验。样机实测温度值(Lab_tTr)和黑体标准器所取温度值(Std_tTr)的均方根误差为0.085℃,相关系数为0.9995(p<0.001);Bland-Altman图显示Lab_tTr与Std_tTr平均偏倚绝对值为0.0069℃,98.6%(70/71)的点在95%一致性界限内。实验表明:本样机与黑体标准器测温结果具有较好的一致性。

The design uses special-purpose medical temperature-measurement probe MLX90615-DAA and main controller MSP430 for temperature source data collection and processing based on the principle of blackbody thermal radiation,and correction lookup algorithm and twice linear regression calibration algorithm is respectively used for temperature value calculation and calibration,71 contrast experiments of simultaneous temperature-measurement are conducted by using the prototype and blackbody standard.The root mean square error between temperature-measurement result of the prototype(Lab_tTr)and value-setting result of blackbody standard(Std_tTr)is 0.085℃,and correlation coefficient is 0.9995(p<0.001).Bland-Altman plot show that the mean absolute bias of Lab_tTr and Std_tTr is 0.0069℃,98.6%(70/71)points are within 95%confidence interval of agreement limits.The experimental results show that the temperature-measurement results by the prototype and the blackbody standard are in good agreement.