Mining auxiliary transport vehicle information automatic identification method

Abstract

The invention discloses a mining auxiliary transport vehicle information automatic identification method. The method is used for detecting the vehicle information difficult to identify in a severe working condition environment of a mine, the method is realized based on an automatic identification device which comprises a bracket, a camera, a rotating disc, a bevel gear and a lead screw, and the method comprises the steps of scanning a license plate number region and capturing a license plate number; carrying out the secondary scanning, using the digital recognition, carrying out the graying, gray stretching, binaryzation and marginalization processing to accurately position a character region, and carrying out character segmentation, normalization processing, zooming and feature extractionto obtain an expression form of a specific character, carrying out matching judgment on the expression form of the specific character and a standard character expression in a character database template, identifying an inputted character image, and comparing the inputted character image with a sample library to confirm the vehicle information. The method can accurately, quickly and efficiently identify and detect the mining vehicle information, and provides a safe, reliable and effective guarantee for mining auxiliary transport vehicles.

Description

technical field [0001] The invention relates to a mine auxiliary transport vehicle information identification device and its method, especially in bad mine working conditions, the auxiliary transport vehicle information is blurred and unclear, by scanning the large-area shape of the vehicle, identifying the location of the license plate area and performing fuzzy identification of the license plate, nearly A mine auxiliary transportation vehicle information identification device and method thereof for confirming vehicle information. Background technique [0002] Coal mine auxiliary transportation refers to all transportation except coal transportation. The main transportation objects include personnel, gangue, equipment, materials and fillings, etc. It is mainly used for the turnover between the ground to the working face, the working face to the ground, the working face or the mining area. For transportation operations, there are a variety of auxiliary equipment used at home...

AI Technical Summary

Problems solved by technology

[0002] Coal mine auxiliary transportation refers to all transportation except coal transportation. The main transportation objects include personnel, gangue, equipment, materials and fillings, etc. It is mainly used for the turnover between the ground to the working face, the working face to the ground, the working face or the mining area. For transportation operations, there are a variety of auxiliary equipment used at home and abroad. According to whether there is a track or not, it is divided into rail transportation and trackless transportation; The power source is divided into diesel engine power source, battery power source and power grid power source, etc. The working place of auxiliary transportation is scattered, and the transportation route changes frequently with the extension or relocation of the working place, and the route is complicated, with many transportation links, and the variety of materials to be transported many, different shapes

[0003] Since mining vehicles come from different manufacturers, there are many types of vehicles from the same manufacturer, and the special functions cause great differences in the shape and structure of the vehicles. The license plate is located at different positions of the vehicle, either high or low, or left or right. Compared with ground road vehicles, The location of the license plate is random; and because of the harsh working conditions of the mining auxiliary transport vehicles, the color of the body is blue, the coal powder, sewage and mud cause the license plate to be seriously blocked by dirt, and the working area is single, which increases the Difficulty in identifying license plate information

[0004] The publication number is CN206962940U, which discloses a utility model patent for "license plate recognition device", which includes a license plate recognition camera fixedly arranged from top to bottom, a multi-directional rotary joint, a display control integrated machine and a vertical column; the multi-directional rotary joint It includes a rotating mechanism and a fixing mechanism, and the rotating mechanism is fixedly sleeved in the fixing mechanism so that it can rotate around the fixing mechanism; the license plate recognition camera is detachably connected to the rotating mechanism, and the display control integrated machine is detachably connected to the fixing mechanism; As the rotating mechanism rotates around the fixed mechanism, the license plate recognition camera rotates around the display control integrated machine; when the rotating mechanism is fixedly connected with the fixed mechanism, the license plate recognition camera is fixed on the display control integrated machine through a multi-directional rotary joint, and the license plate recognition device passes The multi-directional rotary joint makes the adjustment of the license plate recognition camera simple and convenient, but because the license plate of road vehicles has the requirements of the national standard and the national standard, the actual scanning area is small, and it is not suitable for underground vehicles; moreover, the device has a complex structure and is difficult to assemble. The operation procedure is complicated, which makes it difficult to use artificially, and the manufacturing is difficult and costly

[0005] The publication number is CN105096608A, which discloses a utility model patent of "A Method, Device and System for Improving the Accuracy of License Plate Recognition", wherein the method includes: obtaining the license plates of all vehicles in the preset area, and all The license plate of the vehicle is mapped to a temporary license plate set; the license plate recognition result sent by the license plate recognition device is obtained; the license plate recognition result is compared with the temporary license plate set, and the license plate with the highest matching degree between the temporary license plate and the license plate recognition result is collected Send to license plate recognition equipment; the method for improving the accuracy of license plate recognition described in the present invention is to improve the accuracy of license plate recognition by comparing the license plate recognition result with the temporary license plate set of all vehicles in the preset area, and speed up the entry and exit of vehicles speed, greatly reducing the pressure of traffic congestion, and improving the degree of intelligence in traffic management, but the operating area of ​​underground auxiliary transport vehicles is small, the license plate recognition does not require a Chinese character library, and the numbers are basically three digits, so the device appears to be procedural. Complex, not developed for single digit identification

[0006] Therefore, there is an urgent need to design an area identification device and its method, which can quickly find the position of the license plate according to the difference between the color of the vehicle body and the color of the license plate, narrow the recognition area, and effectively solve the problem that the license plate of mining auxiliary transport vehicles is difficult to identify

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