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Attitude indicator device utilizing capacitance measurement

  • US 5,150,104 A
  • Filed: 03/06/1991
  • Issued: 09/22/1992
  • Est. Priority Date: 03/06/1991
  • Status: Expired due to Fees
First Claim
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1. An attitude sensor device for sensing deviations from a reference orientation, said sensor device comprising:

  • a capacitor having two electrodes spaced apart from one another;

    a damped dielectric fluid disposed between said electrodes, said damped dielectric fluid having a bubble of a different dielectric constant and density than said fluid, disposed therein,a nonconductive sealed enclosure for containing said damped dielectric fluid, means defining an upper surface of said enclosure and having tapered sides, such that said bubble is substantially centrally disposed between said electrodes when said sensor device is in said reference orientation;

    means for detecting a capacitance change when said sensor device is altered from said reference orientation; and

    means for outputting a warning signal when said capacitance change is detected.

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