Development of a novel Hall element inclinometer for slope displacement monitoring

Abstract Deep displacement monitoring of slopes is one of the most effective means for early warning, and it is of considerable significance for preventing landslide disasters. This paper introduces a novel inclinometer based on the Hall element sensor to monitor slope displacement. The Hall sensor units are connected in an array to form the inclinometer, which can realize deep-seated slope deformation monitoring. Furthermore, calibration, validation, and slope model experiments were carried out. The research shows that the Hall element can effectively sense magnetic flux density. Compared with other inclinometers, the novel inclinometer can achieve non-contact measurement with a large angle measuring range of −45° to 45° The measuring precision is 1% F.S. The performance of the inclinometer is stable and the maximum error of measurement is within −2.46 to 2.34 mm/m, which can meet the requirements of geotechnical engineering. So, the Hall element inclinometer is reliable for slope displacement monitoring.