基于 RLS 算法的超声换能器温度压力特性校正

Temperature and Pressure Characteristic Correction of Ultrasonic Transducer Based on RLS Algorithm

针对超声换能器的传输特性随着温度和压力发生变化这一普遍存在的问题，利用自适应滤波技术对超声换能器的传输特性进行校正，以减小温度和压力的变化对检测信号的影响。实测数据的处理结果表明：基于ＲＬＳ算法的自适应滤波技术能准确地求出在不同温度压力条件下换能器传输特性变化的逆函数。

It is a common problem that the transfer function of ultrasonic transducer varies with temperature and pressure.In this paper,the adaptive filtering technique is applied to correct the variation of the ultrasonic transducer transfer function with temperature and pressure in order to reduce its influence on the detected signals.The processing results of practical signals show that the adaptive filtering technique based on RLS algorithm is able to accurately estimate the inverse function of a transducer degenerating function under specific environment and effectively correct the signals error resulted from change of the transducer characteristic with temperature and pressure.