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Accelerometer featuring fiber optic bragg grating sensor for providing multiplexed multi-axis acceleration sensing

  • US 6,175,108 B1
  • Filed: 01/30/1998
  • Issued: 01/16/2001
  • Est. Priority Date: 01/30/1998
  • Status: Expired due to Term
First Claim
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1. An accelerometer, comprising:

  • a main body having a housing with a wall, and having a seismic mass means arranged between a diaphragm means and the wall of the housing, the seismic mass means and the diaphragm means responding to an acceleration, for providing a force in at least two orthogonal axes; and

    Bragg grating sensors including an optical fiber having two Bragg gratings disposed therein, a first Bragg grating being disposed in the optical fiber arranged on the diaphragm means, a second Bragg grating being disposed on the optical fiber arranged between the seismic mass means and the wall of the housing, each Bragg grating responsive to the force, and further responsive to an optical signal, for providing respective Bragg grating sensor signals containing information about the acceleration in the at least two orthogonal axes.

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