Abstract
Selecting and designing the optimum ultrasonic probe is vital for ultrasonic measurements and experiments. The amplitude of the emitted ultrasonic wave excitation signal as well as the diameter and the natural frequency of the probe seriously affect the validity of the probe results. In this paper, we analyze the significance of the key parameters of the ultrasonic probe theoretically. Further, an external fixed-point liquid level monitoring system was assembled according to the principle of ultrasonic reflection and transmission. On this experimental platform, we study the key parameters of the ultrasonic probe that affect the system evaluation through a simulation and experiment, and select the optimal sensor parameters for this experiment. The evaluations show that under the experimental conditions where the tested container is made of aluminum alloy and its wall thickness is 3 mm, the best results are obtained when the diameter of the ultrasonic sensor is 15 mm, the amplitude of the emitted excitation signal is ±15 V, and the frequency is 1 MHz. The results’ average deviation is less than ±0.22 V. The evaluations are consistent with the simulation results. This research can effectively monitor the liquid in the closed, ultra-thin-walled container, and can realize non-contact measurement. It provides an effective basis for the parameters selection and design of the ultrasonic probe in the ultrasonic-based experiments and tests.
Highlights
In the fields of traditional industrial control, aerospace, and aviation, it is essential for real-time monitoring and alarming of closed containers or pressure vessels’ liquid levels to be accurate [1,2]
M et al [11] designed an untouched liquid level measurement system based on ultrasonics
Zainal Zakaria et al [13] developed a new method by using a noninvasive ultrasonic instrumentation system for monitoring the LPG (Liquefied Petroleum Gas) level in a 14-kg cylinder
Summary
In the fields of traditional industrial control, aerospace, and aviation, it is essential for real-time monitoring and alarming of closed containers or pressure vessels’ liquid levels to be accurate [1,2]. Hao Haohao et al [14] designed a liquid level monitoring system based on the ultrasonic impedance method. Yanjun et al [16] conducted experiments using two ultrasonic probes with different diameters They explored the influence of different transmitted wave voltage amplitudes and different container wall thicknesses on the ultrasonic echo sound pressure. This paper firstly analyzes the relative parameters of the ultrasonic probe theoretically On this theoretical basis, according to the principle of ultrasonic reflection and transmission, we built an ultrasonic liquid-level monitoring system. We conducted experiments on a 3 mm-thick aluminum alloy container, and we analyzed the effects of essential parameters such as the transmitting amplitude, sensor diameter, and natural frequency on the ultrasonic echo energy. The conclusions of this study provide an effective basis for the selection of ultrasonic transducer parameters in ultrasonic experiments
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
