HARRICK PLASMA

Capacitive bending sensors

A sensor unit for detecting bending of the sensor unit comprises: a capacitive upper sensor having an upper capacitance and comprising first and second deformable upper electrodes spaced apart from one another in a Z direction, the first and second upper electrodes respectively having first and second upper shapes; and a capacitive lower sensor having a lower capacitance, spaced apart from the upper sensor in a Z direction and comprising first and second deformable lower electrodes spaced apart from one another in the Z direction, the first and second lower electrodes respectively having first and second lower shapes. For a bend of the sensor unit in a first direction, the first and second upper shapes change such that the upper capacitance decreases and the lower shapes change such that the lower capacitance increases. For a bend of the sensor unit in a second direction opposed to the first direction, the first and second upper shapes change such that the upper capacitance increases and the lower shapes change such that the lower capacitance decreases.

Madden, John D. W., Mirza S. Sarwar

US20180238716A1

2018-08-23

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