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Adjustable fluid resistors for use in an integrating accelerometer

  • US 4,430,894 A
  • Filed: 01/27/1982
  • Issued: 02/14/1984
  • Est. Priority Date: 01/27/1982
  • Status: Expired due to Fees
First Claim
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1. An improved multi-output integrating accelerometer comprising:

  • a case with a plurality of vertical passages and a plurality of horizontal passages defining a closed void within said case, said vertical and said horizontal passages interconnected in a predetermined manner;

    a damping fluid disposed in said case and said passages;

    a proof mass disposed in a plurality of said vertical passages, said vertical passages having said proof masses therein being proof mass passages, each of said proof masses translating through said proof mass passages in response to an external acceleration, only one of said proof masses translating at any one time, said proof mass passages connected in parallel by said horizontal passages;

    means responsive to a predetermined movement of each of said proof masses for generating an output indicative of said external acceleration, said responsive means fixedly mounted in said proof mass passages;

    a temperature compensated damping device for maintaining a substantially constant damping coefficient of said damping fluid disposed in said case and said passages, said damping device mounted in one of said vertical passages wherein the bottom of said vertical passage having said damping device receives said damping fluid from said proof mass passages through said horizontal passages;

    a volume adjusting device mounted in one of said vertical passages, said volume adjusting device being adjustable from the exterior of said case, said volume adjusting device changing an effective path length of said damping device by the movement of a piston in said volume adjusting device; and

    a pair of externally adjustable fluid resistors mounted in said vertical passages, said fluid resistors extending the temperature operating range and allowing for fine adjustment of said accelerometer.

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