Detecting method for maximal transverse oscillating quantity of combination vehicle based on machine vision and GPS (Global Positioning System)
A vehicle train, lateral swing technology, applied to instruments, measuring devices, radio wave measurement systems, etc., can solve problems such as low detection efficiency, high missed detection rate, and poor environmental adaptability
Inactive Publication Date: 2012-01-18
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology
It can be seen that the current lateral swing detection of automobiles and trains is mainly carried out manually, and the detection efficiency is low.
Due to the random sampling inspection, the accuracy rate is low and the missed detection rate is high; in addition, the liquid sprayed by the spray gun is easily affected by the surrounding air flow, which has poor adaptability to the environment, and the detection reliability is also affected. The maximum lateral swing detection method brings great challenges
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[0066] Below with reference to accompanying drawing of description, the specific embodiment of the present invention is described in more detail:
[0067] The present invention is based on machine vision and GPS the maximum lateral swing amount detection method of automobile train can realize through two stages, and the one, off-line calibration stage, the 2nd, on-line detection stage, the detection flow chart of this method is as follows figure 1 shown. Described automobile train comprises tractor and trailer, is characterized in that, installs CCD camera C below tractor front axle and trailer rear axle respectively 1 and CCD camera C 2 , CCD camera C 1 Responsible for the collection of image information under the tractor, CCD camera C 2 Responsible for the collection of image information under the trailer; in addition, GPS is installed above the tractor to collect the speed of vehicles and trains in real time. 1 and CCD camera C 2 Set a white straight marker line within...
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The invention discloses a detecting method for the maximal transverse oscillating quantity between a tractor and a trailer in the running process of a combination vehicle, which is characterized in that the detecting method comprises the following steps of: acquiring the image information of a linear marker line under the combination vehicle in real time by using two cameras which are arranged atthe bottoms of the tractor and the trailer, respectively calculating a distance value of a fixed connecting point of the centers of the bottoms of the tractor and the trailer relative to the linear marker line by using a machine vision detecting algorithm, meanwhile, obtaining the information of the longitudinal running speed of the vehicle along the linear marker line by using the GPS (Global Positioning System), and figuring out the maximal transverse oscillating value between the tractor and the trailer according to the distance information of the tractor and the trailer relative to the linear marker line at the same moment, thereby realizing the detection on the maximal transverse oscillating quantity in the running process of the combination vehicle.
Description
technical field [0001] The present invention relates to a method for detecting the maximum lateral swing of tractors and trailers during the running of automobiles and trains, in particular to an automatic detection method for lateral swings of automobiles and trains based on machine vision and GPS. and the two cameras at the bottom of the trailer to collect the image information of the straight marking line placed under the car train in real time, and use the machine vision detection algorithm to calculate the distance value of the fixed connection point at the bottom center of the tractor and the trailer relative to the straight marking line. Obtain the longitudinal speed information of the automobile train along the straight line marking line, and calculate the maximum lateral swing value between the tractor and the trailer according to the distance information between the tractor and the trailer relative to the straight line marking line at the same time, and then calculate...
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Login to View More IPC IPC(8): G01B11/02G01S19/52G06T7/00G06T7/13G06T7/136G06T7/80
Inventor 孙伟张小瑞唐慧强夏旻闾军李超
Owner NANJING UNIV OF INFORMATION SCI & TECH