基于超声波的液面位置测量方法研究

Research on Liquid Level Position Measurement Method Based on Ultrasonic Wave

本文提出了基于超声波在浸液波导杆中的传播测量液面位置的方法。建立超声波在浸液波导杆和空气波导杆传播的模型。通过超声波在波导杆中的纵波到达时刻以及传播距离分别计算了空气波导杆和浸液波导杆中纵波的传播速度。根据超声波在空气波导杆和浸液波导杆底部到达的时间差,结合超声波速度,推导出计算液面的理论公式,估算液面位置。

This paper presents a method to measure the liquid level position of fuel machine based on the propagation of ultrasonic waves in immersion waveguide rod. The model of ultrasonic wave propagation in submerged waveguide rod and air waveguide rod is established by method. The propagation velocity of longitudinal wave in air waveguide and submerged waveguide was calculated by the arrival time and propagation distance of ultrasonic wave. Based on different arriving time between ultrasonic waves at the bottom of the air waveguide rod and the immersion waveguide rod, the theoretical equation for calculating the liquid level is derived by combining the ultrasonic wave velocity. According to the time difference between the ultrasonic wave arrival at the bottom of the air waveguide rod and the submerged waveguide rod, combined with the ultrasonic speed, the theoretical formula for calculating the liquid level is derived to estimate the liquid level position.