Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1996-09-20
1999-01-26
Williams, Hezron
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
07351438, 07351432, G01P 1500
Patent
active
058640649
ABSTRACT:
An acceleration sensor is constructed by a substrate, a cylindrical dead-weight movable electrode to be displaced by acceleration, a fixed electrode from the inside of which a cylinder is hollowed, a cylindrical anchor arranged on the substrate for supporting the dead-weight movable electrode with elastic transformable structural material and beams. When acceleration is applied from the outside, the cylindrical detecting face of the dead-weight movable electrode and the cylindrical detected face of the fixed electrode are in contact on a two-dimensional plane parallel to the substrate and the acceleration sensor detects the contact. A radial interval between the detecting face of the dead-weight movable electrode and the detected face of the fixed electrode is set in view of the elastic modulus of the beams so that external force can be detected isotropically and the acceleration sensor detects acceleration on a two-dimensional plane nondirectionally.
REFERENCES:
patent: 5396223 (1995-03-01), Iwabuchi et al.
patent: 5524489 (1996-06-01), Twigg
Ao Kenichi
Kano Kazuhiko
Kitao Norio
Ohtsuka Yoshinori
Suzuki Yasutoshi
Moller Richard A.
Nippondenso Co. Ltd.
Williams Hezron
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