Vehicle detection system and method
First Claim
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1. A vehicle detection system, comprising:
- a single sensor mounted to establish a light curtain along a portion of a roadway, the light curtain of the single sensor to define a first zone and a second zone within the first zone; and
a control unit operatively coupled with the single sensor to detect a vehicle on the roadway,wherein detection of the vehicle in the first zone followed by detection of the vehicle in the second zone indicates a correct direction of travel of the vehicle, andwherein detection of the vehicle in the second zone prior to detection of the vehicle in the first zone indicates a wrong direction of travel of the vehicle.
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Abstract
A vehicle detection system includes a sensor mounted to establish a light curtain along a portion of a roadway, and a control unit operatively coupled with the sensor to detect a vehicle on the roadway. The light curtain defines a first zone and a second zone within the first zone such that detection of the vehicle in the first zone followed by detection of the vehicle in the second zone indicates a correct direction of travel of the vehicle, and detection of the vehicle in the second zone prior to detection of the vehicle in the first zone indicates a wrong direction of travel of the vehicle.
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Citations
20 Claims
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1. A vehicle detection system, comprising:
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a single sensor mounted to establish a light curtain along a portion of a roadway, the light curtain of the single sensor to define a first zone and a second zone within the first zone; and a control unit operatively coupled with the single sensor to detect a vehicle on the roadway, wherein detection of the vehicle in the first zone followed by detection of the vehicle in the second zone indicates a correct direction of travel of the vehicle, and wherein detection of the vehicle in the second zone prior to detection of the vehicle in the first zone indicates a wrong direction of travel of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15)
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10. A vehicle detection system, comprising:
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a sensor mounted to establish a light curtain along a portion of a roadway, the light curtain to define a first zone and a second zone within the first zone; and a control unit operatively coupled with the sensor to detect a vehicle on the roadway, wherein detection of the vehicle in the first zone followed by detection of the vehicle in the second zone indicates a correct direction of travel of the vehicle, and wherein detection of the vehicle in the second zone prior to detection of the vehicle in the first zone indicates a wrong direction of travel of the vehicle, further comprising; the light curtain defining a first reflective zone between the sensor and a first reflective surface and defining a second reflective zone between the sensor and a second reflective surface, wherein obstruction of at least one of the first reflective surface and the second reflective surface from detection by the sensor indicates a direction of travel of the vehicle. - View Dependent Claims (11, 12)
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16. A vehicle detection method, comprising:
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establishing a light curtain with a sensor along a portion of a roadway, including defining with the light curtain a first zone and a second zone having a perimeter within the first zone; and detecting a vehicle on the roadway with the light curtain, including detecting a correct direction of travel of the vehicle in response to detecting the vehicle in the first zone followed by detecting the vehicle in the second zone, and detecting a wrong direction of travel of the vehicle in response to detecting the vehicle in the second zone prior to detecting the vehicle in the first zone. - View Dependent Claims (17, 18, 19, 20)
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Specification