Vehicle measuring apparatus and method for toll collection system
First Claim
1. A vehicle measuring apparatus comprising:
- a plurality of laser sensors separated at a first predetermined height from a road surface of a road and installed closely to each other along a line covering a width of a plurality of lanes of the road, and for providing a signal to measure the vehicle; and
processor means electrically connected to the laser sensors for computing a, height and a width of the vehicle based on the signal received from the laser sensors and previously stored installation information of the plurality of laser sensors, the processing means includingmeans for obtaining a value based on the signal received from each one of the plurality of laser sensors, any one of the plurality of laser sensors with the value larger than a second predetermined height defining a qualified laser sensor; and
means for computing the width of the vehicle based on a number of the qualified laser sensors.
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Accused Products
Abstract
Vehicle measuring apparatus and method are disclosed to accurately measure height and width of a vehicle moving at a high speed. The vehicle measuring apparatus includes: a plurality of laser sensors separated from the road surface with a predetermined height and installed closely to each other corresponding to width of every roadway on the road, and receiving a reflection light of a laser light emitted onto the road from the plurality of the laser sensors and outputting a vehicle measurement signal; and a processor means electrically connected to the laser sensors and calculating height and width of the vehicle on the basis of the signal to measure the vehicle and previously stored installation information of the plurality of laser sensors.
27 Citations
21 Claims
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1. A vehicle measuring apparatus comprising:
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a plurality of laser sensors separated at a first predetermined height from a road surface of a road and installed closely to each other along a line covering a width of a plurality of lanes of the road, and for providing a signal to measure the vehicle; and processor means electrically connected to the laser sensors for computing a, height and a width of the vehicle based on the signal received from the laser sensors and previously stored installation information of the plurality of laser sensors, the processing means including means for obtaining a value based on the signal received from each one of the plurality of laser sensors, any one of the plurality of laser sensors with the value larger than a second predetermined height defining a qualified laser sensor; and means for computing the width of the vehicle based on a number of the qualified laser sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A vehicle measuring method comprising the steps of:
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sequentially driving a plurality of laser sensors separated from the a road surface of a road at a first predetermined height and installed closely to each other along a line covering a width of a plurality of lanes on the road; measuring a lapse time from a time point of emitting a laser light from the plurality of laser sensors to a time point of receiving light; calculating a distance corresponding to the measured lapse time; computing a height and of a vehicle based on the calculated distance value; counting a number of qualified laser sensors, the qualified laser sensor being any of the plurality of laser sensors with the calculated distance value larger than a second predetermined height; and computing a width of the vehicle based on the number of qualified laser sensors and installation information of the plurality of laser sensors. - View Dependent Claims (19)
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20. A vehicle measuring method comprising the steps of:
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grouping a plurality of laser sensors separated from a surface of a road at a first predetermined height and installed closely to each other along a line covering a width of a plurality of lanes on the road into a plurality of groups corresponding to each of the plurality of lanes; sequentially driving the plurality of laser sensors in a group one by one and simultaneously driving the plurality of laser sensor groups; measuring a lapse time from a time point of emitting a laser light emitted from the plurality of laser sensors according to driving of the plurality of laser sensors to a time point of receiving light; calculating a distance corresponding to the measured lapse time; computing a height of a vehicle on the base of the calculated distance value; and counting the number of qualified laser sensors, the qualified laser sensor defining one of the plurality of laser sensors with the calculated distance value larger than a second predetermined height; and computing a width of the vehicle based on the number of qualified laser sensors and installation information of the plurality of laser sensors. - View Dependent Claims (21)
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Specification