A Novel Ultrasonic Method for Liquid Level Measurement Based on the Balance of Echo Energy
| Autor: | Liang Zhang, Jijun Xiong, Bin Zhang, Wenyi Liu, Yanjun Zhang, Zong Yao, Yue-Juan Wei |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
Acoustics 01 natural sciences Biochemistry Article Analytical Chemistry ultrasonic impedance 0103 physical sciences coupling Electrical and Electronic Engineering MATLAB 010301 acoustics Instrumentation Electrical impedance echo energy computer.programming_language Coupling business.industry Attenuation 010401 analytical chemistry Echo (computing) balance matching layer Atomic and Molecular Physics and Optics 0104 chemical sciences Transducer Ultrasonic sensor business computer Energy (signal processing) |
| Zdroj: | Sensors (Basel, Switzerland) Sensors; Volume 17; Issue 4; Pages: 706 |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s17040706 |
| Popis: | This study presents a novel method for determining the liquid level from the outside of a sealed container, which is based on the balance of echo energy received by two receiving sensors. The proposed method uses one transmitting transducer and two receiving sensors that are encapsulated in a coupling plane and arranged by certain rules. The calculation and comparison of echo energy are grounded on the difference ultrasonic impedance between gas and liquid media. First, by analyzing the propagation and attenuation characteristics of ultrasonic waves in a solid, an acoustic model for calculating the echo energy is established and simulated in MATLAB. Second, the proposed method is evaluated through a series of experiments. The difference and ratio of echo energy received by two receiving sensors are calculated and compared under two different coupling conditions. Two kinds of the sensors that are arranged by different rules are selected for measuring the liquid level, and the measurement are analyzed and discussed in detail. Finally, the experimental results indicate that the proposed method can meet the proposed accuracy requirements and can effectively solve the problems caused by some poor coupling conditions. |
| Databáze: | OpenAIRE |
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