Most present acoustic level gauges use a sound generator which can produce high - power acoustic waves and a microphone which can detect the echo signal . the fluid level can be worked out based on the artificial analysis of the echo curve 目前正在应用的井下液位测量仪器，主要是通过爆炸声源产生大功率声脉冲信号，利用微音器接收回波信号，人为地对回波信号曲线进行分析来估算液位。
