Capacitive sensor for measuring accelerations and inclinations

Details Capacitive sensor for measuring accelerations and inclinations Capacitive sensor for measuring accelerations and inclinations

1996-08-26

1998-10-20

Williams, Hezron E.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

7351436, 7351438, 7351412, 73522, 361280, G01P 15125

Patent

active

058249010

ABSTRACT:
A capacitive sensor for measuring accelerations and inclinations with respect to the gravitational field. The capacitive sensor has at least one stator electrode and one displacement electrode, in which the position of the displacement electrode can change with respect to the stator electrode, thereby resulting in a change in capacitance. From this change of capacitance, an acceleration or inclination can be measured. The capacitive sensor is distinguished by the stator electrode being designed to have an annular shape and the displacement electrode is likewise formed by an annular element which is connected to a central surface part via resilient elastic webs, and wherein the central surface part is immovably connected to the sensor housing. Alternatively, the capacitive sensor may have the stator electrode and the displacement electrode formed as polygonal shapes. Air slot channels may also be included in the capacitive sensor so that air cushions that are built up as a result of sudden accelerations or inclinations will act as a temporary damper against vibrations in the electrodes, thereby reducing inaccuracies caused by these sudden fluctuations.

REFERENCES:
patent: 3876916 (1975-04-01), Stoakes
patent: 4023413 (1977-05-01), Stauber
patent: 4435737 (1984-03-01), Colton
patent: 5253526 (1993-10-01), Omura et al.
patent: 5487305 (1996-01-01), Ristic et al.

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