研究使用Pt膜电阻和热敏电阻两种传感器同时对温度进行测量,通过对其输出数据的融合处理,利用两者静动态特性的不同特点求得比较好的测量结果.其中,应用加权平均的方法进行静态融合,融合测量方差分别为σL=3.9×10^-3和σC=3.59×10^-2的双传感器,获得了σ=3.5×10^-3的测量结果;应用分布式多尺度动态融合理论进行动态融合,针对上升时间分别为80 s和60 s的两只传感器,获得了62 s的融合结果.试验表明:应用双精度传感器的融合数据综合提高了测量系统的准确性和动态响应特性.
This paper proposes a novel strategy to detect temperature by simultaneously equipping one platinum membrane resistor and one thermistor. It focuses on improving the measurement performance by fusing sensing data with respect to the reciprocal static and dynamic properties of the two sensors. For steady result, Average Weighted Method is employed to achieve the final measurement variance as σ = 3.50×10^-3 while the original variances of the two sensors are σL = 3.90 ×10^-3 and σC = 3.59×10^-2, respectively. Besides, for the rise - time of each sensor with 80 s and 60 s, respectively, computed with the algorithm of Multi - Scale Analysis Strategy , the overall rise -time converges to 62 s evaluated as the dynamic response. Experimental results show that veracity and dynamic characteristics of temperature detection are holistically improved by taking the data fusion of the bi - precision sensors.