Propagation Laws of Ultrasonic Continuous Signals at the Transmitting Transducer–Soil Interface

Zhinan Wang, Caiyun Lu (), Hongwen Li, Chao Wang, Longbao Wang and Hanyu Yang
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Zhinan Wang: College of Engineering, China Agricultural University, Beijing 100083, China
Caiyun Lu: College of Engineering, China Agricultural University, Beijing 100083, China
Hongwen Li: College of Engineering, China Agricultural University, Beijing 100083, China
Chao Wang: College of Engineering, China Agricultural University, Beijing 100083, China
Longbao Wang: College of Engineering, China Agricultural University, Beijing 100083, China
Hanyu Yang: College of Engineering, China Agricultural University, Beijing 100083, China

Agriculture, 2024, vol. 14, issue 9, 1-21

Abstract: Ultrasonic detection is one of the main methods for information detection and has advantages in soil detection. Ultrasonic signals attenuate in soil, resulting in unique propagation laws. This paper studies the propagation laws of ultrasound in soil, focusing on the propagation characteristics of ultrasonic continuous signals at the transducer–soil interface. This study uses excitation frequency and amplitude as experimental factors and employs the discrete element simulation method to analyze the vibration characteristics of soil particles. It reveals the relationship between changes in soil pressure at the interface and the movement of the transducer. The results show that the motion curve of the transmitting transducer lags behind the soil pressure changes, and the energy of the ultrasonic signal increases with higher excitation frequency and amplitude. Specifically, the peak value of the first wave | H 0 | at 40 kHz and 60 kHz is 210% and 263% of that at 20 kHz, respectively. When the excitation amplitude increases from 0.005 mm to 0.015 mm, the value of the peak value of other waves | H | increases by 323%. This paper preliminarily reveals the propagation laws of ultrasonic continuous signals at the transducer–soil interface, providing theoretical support for the development of ultrasonic soil property detection instruments.

Keywords: ultrasonic detection; continuous signal; transducer–soil interface; discrete element method; propagation law (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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