说明：  　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RL S 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, 从而能很好地校正由于超声换能器传输特性随温度压力变化所引入的信号误差。
(Ultrasonic transducer for the transmission properties change with temperature and pressure of this common problem, using adaptive filtering techniques on the ultrasonic transmission characteristics of the transducer be calibrated to reduce the temperature and pressure changes on signal detection impact. Real data processing results show that: Based on RL S method of adaptive filtering techniques can accurately calculate temperature and pressure conditions at different transducer changes in transmission characteristics of the inverse function, which can be corrected well as transmission characteristics of ultrasonic transducer With the introduction of temperature and pressure changes in the signal error.)