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Optically sensed wire gyroscope apparatus and system, and methods for manufacture and cursor control

  • US 5,594,169 A
  • Filed: 11/04/1994
  • Issued: 01/14/1997
  • Est. Priority Date: 11/04/1994
  • Status: Expired due to Term
First Claim
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1. A gyroscopic device for sensing motion and comprising:

  • a frame;

    a first tensioned wire having first and second ends suspended by the frame and including a suspended wire portion therebetween;

    a first pair of magnets mounted on the frame and having opposite poles spaced apart about the first tensioned wire for forming a first gap and a first magnetic field therein oriented across the first gap with the suspended wire portion of the first tensioned wire disposed within the first magnetic field;

    a first oscillator connected to the first tensioned wire for supplying a first oscillating signal to the first tensioned wire to vibrate the first tensioned wire within the first magnetic field in substantially perpendicular orientation thereto and at a selected vibration frequency;

    a source of radiation spaced above the first tensioned wire for radiantly illuminating a selected portion thereof;

    a detector spaced beneath the first tensioned wire for producing a first output proportional to lateral displacement of a portion of the first tensioned wire along the first magnetic field in response to variations in the radiant illumination received thereby caused by the vibrating first tensioned wire; and

    a first circuit connected to the first tensioned wire and responsive to back potential on the first tensioned wire for producing a second output proportional to velocity of vibration of a portion of the first tensioned wire in a direction substantially perpendicular to the first magnetic field.

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