Design Study of Electromagnetic-diamagnetic Hybrid Levitation Inclination Sensor

doi:10.3901/JME.260374

Abstract

Abstract: Inclination sensors are widely used in equipment attitude monitoring and other fields. Diamagnetic levitation technology has the characteristics of passive stable levitation, which can break through the limitations of contact mechanical friction and realize the fast and free response of the sensitive element, and has a natural advantage in the design of high-precision inclination sensor. Existing studies mainly focus on the input-output mapping relationship of the sensitive element in the self-stabilized region, resulting in a small sensor operating range (±1.1°). Based on this, an adjustable sensitivity and large range single-axis electromagnetic-Diamagnetic hybrid levitated inclination sensor design method is proposed in combination with optical measurement means. The inclination sensor adopts a new type of sensitive element structure composed of diamagnetic graphite plate and induction coil as the detection unit, realizes the passive and stable levitation of the sensitive element in the non-measuring axis through the layout of the “Opposite1D” type permanent magnet arrangement, and introduces the axial AC induction electromagnetic drive technology so that the sensor working range is no longer limited to the self-stabilized region. The experimental verification, experiments show that the inclination sensor can realize the measurement of ±10.8° angular range, and the sensitivity can reach 1.168 mm/(°); and the sensor sensitivity can be adjusted in the range of 1.168 mm/(°) to 2.623 mm/(°). With the characteristics of frictionless, large range and adjustable sensitivity, it is of great value in the field of precision measurement of small inclination angle.

Key words: inclination sensor, diamagnetic levitation, alternating magnetic field, large range

CLC Number:

TP212

XU Yuanping, ZHANG Yingao, JIANG Qiqi, ZHOU Jin, WANG Mingxin. Design Study of Electromagnetic-diamagnetic Hybrid Levitation Inclination Sensor[J]. Journal of Mechanical Engineering, 2026, 62(7): 234-243.

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