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A Differential Capacitive Torque Sensor With Optimal Kinematic Linearity

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4 Author(s)
Asad M. Madni ; BEI Technol., Inc, Sylmar, CA ; Jim B. Vuong ; Daniel C. H. Yang ; Bin Huang

This paper presents a new design for a torque sensor based on a differential capacitive technology. An arc-radial mechanism is adopted to achieve high rotary/radial motion linearity. Kinematic model of this assembly is derived via vector loop equations. A nonlinearity index is formulated and practical kinematic constraints are imposed. Results show that very high kinematic linearity could be achieved by this new device

Published in:

IEEE Sensors Journal  (Volume:7 ,  Issue: 5 )