초록 ▼

A capacitive position sensor employs conventional printed circuit board (PCB) technology to detect capacitive changes caused by the movement of a ball along conductive tracks. A recessed region (or through hole) is stamped on the PCB with well controlled dimensions. Electrically conductive tracks ar

A capacitive position sensor employs conventional printed circuit board (PCB) technology to detect capacitive changes caused by the movement of a ball along conductive tracks. A recessed region (or through hole) is stamped on the PCB with well controlled dimensions. Electrically conductive tracks are laid around the region and connect to a capacitance detection circuit on the PCB. As the PCB experiences inclination or acceleration the ball moves along the axis of the recessed region causing variations in the measured capacitance.

대표청구항 ▼

A position sensor comprising: a printed circuit board (PCB) having an elongated aperture stamped therethrough, a first terminal of electrically conductive track disposed on a surface of said PCB along a first side of said elongated aperture, and a second terminal of electrically conductive track dis

A position sensor comprising: a printed circuit board (PCB) having an elongated aperture stamped therethrough, a first terminal of electrically conductive track disposed on a surface of said PCB along a first side of said elongated aperture, and a second terminal of electrically conductive track disposed on said surface of said PCB along a second side of said elongated aperture; a ball rollably disposed in said elongated aperture; and a capacitance detection circuit coupled to said first and second terminals for detecting a change in the capacitance between said first and second terminals, as said ball rolls along said elongated aperture.