Swing Detection System Of Straddle-type Monorail Track Beam Based On MV

Straddle-type Monorail PC Track Beam Transportation System is such a kind of transportation system in which bodywork is running by riding on the track beam, through monorail track beam supporting, stabilizing and be oriented to the train. The main features of its technology: this track beam not only has such a traditional function of the load, but more importantly also has a roadway function when the train is running.There is huge moving load on track beam set on pier while the monorail vehicle is passing on it, after long time operation, substantial transverse swing of the track beam may be produced and the resultant serious threat to safety.Currently, a solution to the measurement of the swing amplitude of the track beam relying on artificially prizing the track beam and recording the swing amplitude with the displacement sensor is dominated, which however has the disadvantages of huge intensity of labor, lack of security and low measuring precision. A new solution based on Machine Vision method is made to successfully achieve the goal of rapid measurement, non-contact and high measurement precision. Based on the solution, detection system of the swing amplitude of the track beam is designed inside the paper.In this paper, for accomplishing the detection system the major work is as follows:Firstly, a hardware platform is built through many tests and investigation of spot environment, including frame design of the system, choice of the hardware such as light source, camera, lens, computer and so onSecondly, the software of image acquisition has been completed. According to the accuracy of measurement requirements, it is needed to calibrate the CMOS camera and set its parameters.Thirdly, a comparison is made among the results of different edge detection methods and the best one is selected. In order for accelerating the speed of threshold segmentation, the methods of Otsu has been improved. In addition, classical template matching is selected to calculate the amplitude of track beam body. An automatic matching method is also made to improve the automation level of detection.Finally, after installing and debugging in the scene, now the whole system can be applied successfully. The detection toward all the track beam of Light Rail in ChongQing has been made and there are thirty-three places where the swing amplitude of tract beam in excess of one millimeter. the accuracy is a hundred percent, compared with the manual results.In this paper, the detection method based on MV system can detect swing amplitude of track beam body accurately. In addition, it provides several time higher efficiency in comparison to original manual detection method. This system has successfully achieved the goal of self-measurement of swing amplitude of track beam and ensured the safety of the track working and it is applied in swing detection items of Light Rail in ChongQing.