METHOD AND DEVICE FOR DETECTING WHETHER A VEHICLE HAS EXCEEDED A SPEED LIMIT
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Abstract
A method for detecting if a vehicle has exceeded a speed limit captures a vehicle feature characterizing a vehicle entering a monitoring section at a first time. A first coding value to be assigned to the vehicle feature is determined by one-way encryption. The vehicle feature of a vehicle leaving the monitoring section is captured at a second time. A second coding value to be assigned to the vehicle feature captured at the second point in time is determined by the one-way encryption. The first and second coding values are compared and if they match, the average speed of the vehicle is determined using the time required to travel through the monitoring section. The average speed is compared to a predefined maximum speed and the vehicle feature is only stored if the average speed exceeds the maximum speed. A corresponding device for carrying out the method is also provided.
60 Citations
34 Claims
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1-16. -16. (canceled)
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17. A method for capturing a speed violation by a vehicle, the method comprising the following steps:
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capturing a vehicle feature characterizing a vehicle entering a monitoring section at a first time; ascertaining a first coding value to be associated with the vehicle feature by using a one-way encryption method; capturing the vehicle feature from a vehicle leaving the monitoring section at a second time; ascertaining a second coding value to be associated with the vehicle feature captured at the second time by using the one-way encryption method; comparing the first and second coding values with one another; if the first and second values match, ascertaining an average speed of the vehicle by using a period of time required to cover the monitoring section; comparing the average speed with a prescribed maximum speed; and storing the vehicle feature only if the average speed has exceeded the maximum speed. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. An apparatus for capturing a speed violation by a vehicle, the apparatus comprising:
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first and second monitoring stations being spaced apart from each other and defining a monitoring section therebetweeen, said first and second monitoring stations each including a respective capturing device configured to capture a characteristic vehicle feature of a vehicle entering said monitoring section and a characteristic vehicle feature of a vehicle leaving said monitoring section; a timing apparatus configured to capture a first time of entry into said monitoring section and a second time of leaving said monitoring section; a coding apparatus configured to ascertain first and second coding values from the vehicle features captured by said first and second monitoring stations by using a one-way encryption method; and a computation apparatus connected to said first and second monitoring stations, to said coding apparatus and to said timing apparatus, said computation apparatus configured to; ascertain an average speed of the vehicle within said monitoring section between said first and second monitoring stations by using time signals from said timing apparatus, establish if a prescribed maximum speed has been exceeded, and store the vehicle feature if said maximum speed has been exceeded. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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Specification