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Monitoring process and system

  • US 20040149939A1
  • Filed: 03/29/2004
  • Published: 08/05/2004
  • Est. Priority Date: 06/04/2001
  • Status: Active Grant
First Claim
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1. A process for monitoring a moving object, including the steps of:

  • generating an optical signal modulated at a modulation frequency;

    transmitting said optical signal across a path of said moving object;

    detecting changes in a received signal due to movement of said object by monitoring substantially at said modulation frequency; and

    determining at least one parameter of said object on the basis of said changes.

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