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A Large Range Multi-Axis Capacitive Force/Torque Sensor Realized in a Single SOI Wafer

ALVERINGH, IR. D. (2013) A Large Range Multi-Axis Capacitive Force/Torque Sensor Realized in a Single SOI Wafer.

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Abstract:A MEMS-based silicon capacitive force/torque sensor is designed and realized to be used for biomechanical applications and robotics. The sensor is able to measure the forces in three directions and two torques using four parallel capacitor plates and four comb-structures. Novel spring and lever structures are designed to separate the different force components and minimize crosstalk. The fabrication process is based on deep reactive ion etching on both sides of a single silicon-on-insulator wafer and uses only two masks making it very suitable for mass production. The sensor has a force range of 2 N in shear and normal direction and a torque range of more than 6 N mm. It has a high sensitivity of 38 fF/N and 550 fF/N in shear and normal direction respectively. A calibration matrix is derived from the sensor’s measured characteristics.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:50 technical science in general, 52 mechanical engineering, 53 electrotechnology
Programme:Electrical Engineering MSc (60353)
Link to this item:http://purl.utwente.nl/essays/68956
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