Thick film rotational accelerometer having two structurally integrated linear acceleration sensors

• US 5,456,109 A
• Filed: 03/29/1993
• Issued: 10/10/1995
• Est. Priority Date: 03/29/1993
• Status: Expired due to Term

• Current Assignee: Casantra Acquisition III LLC (Intellectual Ventures LLC)
• Original Assignee: Delco Electronics Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Knigga, Bradley R., Gillund, Gary M., Lautzenhiser, Frans P.
• Primary Examiner(s): Chilcot, Richard
• Assistant Examiner(s): FELBER, JOSEPH LEON
• Application Number:
  US08/038,422
• Time in Patent Office: 925 Days
• Field of Search: 73/517 A, 73/510, 364/566, 338/2, 338/5
• US Class Current: 73/514.03
• CPC Class Codes: G01P 15/0888 for indicating angular acceleration
• CPC Class Codes: G01P 15/123 by piezo-resistive elements, e.g. semiconductor strain gauges
• CPC Class Codes: G01P 3/44 for measuring angular speed G01P3/56 takes precedence

Abstract

A rotational accelerometer has a pair of coplanar, operationally independent linear acceleration sensors. Coplanarity is provided by a unitary substrate which forms the base structure of the operationally independent linear acceleration sensors.

Claims

1. A thick film rotational accelerometer comprising:

an alumina base portion defining a plane;

first and second support members integrally formed with and disposed at opposite ends of said alumina base portion;

first and second U-shaped lever sections integrally formed with said alumina base portion, each of said U-shaped lever sections essentially surrounding a corresponding one of said support members so that a gap is provided substantially everywhere between each of said U-shaped lever sections and the corresponding one of said support members except at said base portion;

first and second substantially equivalent masses, each of said masses disposed on an unsupported end of a respective one of said U-shaped lever sections so as to be oppositely disposed about said alumina base portion, such that the corresponding one of said support members is disposed between said alumina base portion and a corresponding one of said masses; and

means for independently detecting respective displacements of each of said masses in a direction normal to the plane of said alumina base portion to determine a measure of rotational acceleration.