Open AccessDesign of Underground Displacement Measurement System Based on Mutual Inductance and Hall Effect
Author(s) -
Feng Wang,
Nanying Shentu,
Qing Li,
Sheng Wang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/558/3/032027
Subject(s) - hall effect sensor , displacement (psychology) , solenoid , inductance , voltage , hall effect , electrical engineering , measure (data warehouse) , magnet , acoustics , engineering , electronic engineering , physics , computer science , electrical resistivity and conductivity , psychology , psychotherapist , database
Deep displacement monitoring of rock and soil is important for landslide warning. By using mutual inductance effect and Hall Effect, the author designed the underground displacement sensing unit through the solenoid and permanent magnet and the Hall sensor. The author designed the Hall voltage measurement circuit and installation device, and used the mutual inductance voltage measurement circuit that the laboratory has realized, which can accurately collect the mutual inductance voltage and the Hall voltage in real time. Through the 485 communication, the collected data is transmitted to the upper computer, the mathematical model established by the curve fitting method can be used to measure the real-time displacement of the deep part of the rock and soil. The experimental result shows that the horizontal displacement measurement range is 0-40mm, and the measurement accuracy can reach 1.5mm. It can measure the underground displacement within a reasonable error range.