2020
DOI: 10.3390/mi11090837
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Error Analysis of a Spherical Capacitive Sensor for the Micro-Clearance Detection in Spherical Joints

Abstract: Spherical joints have attracted increasing interest in the engineering applications of machine tools, industrial robots, medical equipment, and so on. As one of the promising methods of detecting the micro-clearance in spherical joints, the measurement accuracy of a spherical capacitive sensor could be affected by imperfectness during the manufacturing and installation of the sensor. This work presents error analysis of a spherical capacitive sensor with a differential structure and explores the dependence of … Show more

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“…The mathematical model for the rotational angles of a spherical joint and the capacitance are deduced, and the capacitance values of the capacitors at different rotations are simulated, suggesting the feasibility and effectiveness of the proposed capacitive detection method. The problem of detecting the micro-clearance in spherical joints, for which capacitive sensors are a very interesting solution, is also considered [4]. Five error sources of spherical capacitive sensors are examined, and their mathematical models are deduced and validated by simulation.…”
mentioning
confidence: 99%
“…The mathematical model for the rotational angles of a spherical joint and the capacitance are deduced, and the capacitance values of the capacitors at different rotations are simulated, suggesting the feasibility and effectiveness of the proposed capacitive detection method. The problem of detecting the micro-clearance in spherical joints, for which capacitive sensors are a very interesting solution, is also considered [4]. Five error sources of spherical capacitive sensors are examined, and their mathematical models are deduced and validated by simulation.…”
mentioning
confidence: 99%