Detection method and device for speed and displacement of rail train

Abstract

The invention discloses a detection method and device for a speed and a displacement of a rail train. The method comprises the steps: 1) acquiring a ground motion image in real time when the train runs, and calculating a displacement of two adjacent-frame images; and 2) calculating a moving speed of the current ground image according to the displacement and an acquired time interval between the two adjacent-frame images, obtaining a current train speed through a calculation according to a function relationship between the train speed and the moving speed of the ground image, and accumulating displacement data obtained through the calculations before the current time to obtain a current train displacement. The device comprises an image acquisition and processing for acquiring the ground motion image in real time and calculating the displacement between the two adjacent-frame images, and a data processing module for calculating the speed and the displacement of the current train according to the displacement and the acquired time interval between the two adjacent-frame images. The method and device have the advantages of the simple principle and operation, the rapid detection speed, high detection precision and the wide application range.

Description

technical field [0001] The invention relates to the technical field of rail transportation, in particular to a method and device for detecting the speed and displacement of rail trains. Background technique [0002] The safe operation of rail trains is inseparable from real-time monitoring of train running status, and train speed and displacement are two important parameters in real-time monitoring. At present, the detection and positioning methods of rail train speed usually have the following types: [0003] (1) A method of indirectly obtaining the train speed by detecting the train wheel speed, and then converting the speed combined with the wheel diameter parameter. On the one hand, the speed measuring device in this kind of method generally has a moving mechanical structure, the structure of the speed measuring device is complex, the reliability is low, the accuracy of the low-speed range is poor, and the wheel diameter parameters need to be updated frequently; The me...

AI Technical Summary

Problems solved by technology

At present, detection methods based on image processing usually use microprocessor programming to implement complex image processing algorithms, which are very inefficient and low-precision, and are usually only suitable for detection when the ground environment changes little. , the detection of rail trains with large changes in illumination intensity and ground texture is not applicable. In addition, in order to improve the efficiency of image processing, it is usually necessary to make special marks on the image, which further increases the complexity and difficulty of obtaining the running state of the vehicle

Images