Title :
A Differential Capacitive Torque Sensor With Optimal Kinematic Linearity
Author :
Madni, Asad M. ; Vuong, Jim B. ; Yang, Daniel C H ; Huang, Bin
Author_Institution :
BEI Technol., Inc, Sylmar, CA
fDate :
5/1/2007 12:00:00 AM
Abstract :
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
Keywords :
capacitive sensors; kinematics; torque measurement; arc-radial mechanism; differential capacitive sensor; nonlinearity index; optimal kinematic linearity; torque sensor; vector loop equations; Capacitance; Capacitive sensors; Capacitors; Dielectric materials; Kinematics; Linearity; Paper technology; Permittivity; Position measurement; Torque; Differential capacitance; kinematics; linearity; optimization; torque sensor;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2007.894134
