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Safety zone detection, enforcement and alarm system and related methods

  • US 9,047,781 B2
  • Filed: 05/31/2012
  • Issued: 06/02/2015
  • Est. Priority Date: 05/31/2011
  • Status: Active Grant
First Claim
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1. A system for alerting a user in a safety zone adjacent a stationary vehicle, the system comprising:

  • one or more sensors configured to generate a sensor signal in response to a detected location and/or trajectory of a moving vehicle in an encroachment zone and/or the safety zone, wherein the encroachment zone is a region adjacent the safety zone in which vehicles are at risk of entering the safety zone;

    a control unit configured to receive the signal from the one or more sensors and to determine, responsive to the sensor signals, a likelihood of the moving vehicle entering the safety zone, wherein the control unit is further configured to generate a trigger signal if the likelihood of the moving vehicle entering the safety zone is greater than a predetermined threshold; and

    an alarm unit configured to receive the trigger signal from the control unit and to automatically trigger an alarm protocol when the trigger signal is received to alert the user in the safety zone, wherein the sensors comprise at least two spaced-apart optical sensors, and the sensor signals comprise a velocity of the moving vehicle based on a time that the vehicle is detected by each of the two spaced-apart optical sensors.

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