超声波测距精度的研究

Study on precision of ultrasonic ranging

介绍了一种基于回波包络分析的高精度超声波测距方法。该方法研究了幅度起伏和时间漂移条件下回波包络模型,并对模型进行了简化处理,可以更准确地计算超声波渡越时间。另外,实时测量环境温度对超声波传播速度加以修正,从而大大提高了测量精度。

This paper introduces an ultrasonic ranging method based on analyzing the envelope of echo. This method researches the echo envelope model which has been simplified in this paper under range wave and time excursion, and can compute the transmitting time more accurately. In addi tion, the real-time environmental temperature is also measured to calibrate the speed of ultrasonic, consequently, improve measuring precision greatly.