Method for obtaining longitudinal profile pattern of mobile vehicle and device thereof

Abstract

The invention relates to a method for obtaining a longitudinal profile pattern of a mobile vehicle and a device thereof. A transmitter transmits at least one group of laser beams and a vertically downward laser beam as a timing reference to an upper surface of a traveling vehicle above a lane at a set height, and each group of transmitting laser beams comprises two parallel beams longitudinally arranged along the lane; a receiver receives reflected light signals from the surface of the vehicle at a set height; a processor computes coordinates of reflecting points on the upper surface of the vehicle corresponding to the received reflected beams according to the emission angles of the two transmitting laser beams, the set positions of the transmitter and the receiver receiving the reflected light, the speed of the vehicle and the time for receiving the reflected light signals; and the longitudinal profile pattern of the mobile vehicle can be obtained by connecting the reflecting points by a line in sequence.

Description

technical field [0001] The invention relates to a method and a device for acquiring a moving target figure, in particular to a method and a device for acquiring a moving vehicle longitudinal profile figure. Background technique [0002] With the rapid development of cities, the intelligent management of urban and intercity traffic dominated by motor vehicles is particularly important. In the intelligent management of urban and intercity traffic, the statistics of traffic flow and the identification of vehicle types are very important aspects. For the identification of vehicle types, the most direct and effective way is to identify them based on the longitudinal profile of the vehicle. At present, video technology can be used to obtain the outer contour shape of moving vehicles. Although it can obtain more accurate images, it is greatly affected by the weather, especially its investment is large and the operating cost is high. Chinese patent CN101162507 discloses a method f...

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Problems solved by technology

At present, video technology can be used to obtain the outer contour shape of moving vehicles. Although it can obtain more accurate images, it is greatly affected by the weather, especially its investment is large and the operating cost is very high.

Chinese patent CN101162507 discloses a method for identifying vehicle types of moving vehicles. It is to arrange the light emitting device on one side of the identified vehicle, the light receiving device on the other side of the identified vehicle, and the emitting device to emit parallel light beams. When passing through, the emitting beam will be blocked, and the receiving device will receive the unblocked beam to obtain the profile of the vehicle, and to obtain the longitudinal profile of the vehicle, the signal must be collected from the side of the vehicle, so it can only be applied to single lanes

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