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OPTICAL LINEAR MEASUREMENT SYSTEM AND METHOD

  • US 20160076918A1
  • Filed: 09/15/2014
  • Published: 03/17/2016
  • Est. Priority Date: 09/15/2014
  • Status: Active Grant
First Claim
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1. A system for measuring movement of a movable device, the system comprising:

  • a first electrical-to-optical converter (EOC) for converting an electrical signal into a first optical signal;

    a first optical fiber having first and second ends, the first optical fiber being arranged in a coil, at least one location on the first optical fiber being mechanically coupled to the movable device such that movement of the movable device imparts movement in the first optical fiber that produces a change in a radius of the coil, the first end receiving the first optical signal from the first EOC, and wherein the first optical signal is received in the first end of the first optical fiber, propagates along the first optical fiber and passes out of the second end of the first optical fiber;

    a first optical-to-electrical converter (OEC) for receiving the first optical signal passing out of the second end of the first optical fiber and converting the received first optical signal into a first output electrical signal; and

    processing circuitry that receives and processes the first output electrical signal to determine a signal strength of the first optical signal, and wherein the processing circuitry adjusts the determined signal strength to compensate for temperature and determines an amount of movement of the movable device based on the adjusted signal strength.

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