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Fiber tip based sensor system for measurements of pressure gradient, air particle velocity and acoustic intensity

  • US 20050146726A1
  • Filed: 01/21/2005
  • Published: 07/07/2005
  • Est. Priority Date: 10/15/2002
  • Status: Active Grant
First Claim
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1. A fiber optic sensor system for measuring pressure gradient, air particle velocity and acoustic intensity, comprising:

  • at least a pair of substantially identical sensors, each sensor including a diaphragm and a sensing fiber-tip based interferometer having a Fabry-Perot cavity formed between said fiber tip and said diaphragm, said fiber tip and said diaphragm both being optically reflective to form a pair of reflective surfaces of said interferometer, said pair of the sensors being aligned along a single axis and facing in the same direction, said acoustic disturbance deflecting said diaphragm of each said sensor; and

    a processor operationally coupled to said at least a pair of sensors for calculating pressure gradient, air particle velocity and acoustic intensity of the acoustic field based on the deflection of said diaphragm affected by the acoustic field.

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