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Method, system and device for rapid detection of foreign objects in leaking holes of railway wagons

The technology of a railway freight car and a detection method is applied in the directions of railway vehicle shape measuring instruments, railway car body parts, railway auxiliary equipment, etc., which can solve the problems of inability to take into account the detection accuracy rate and detection time, and achieves saving manpower input and uniform operation standards. , to ensure the effect of accuracy and stability

Active Publication Date: 2021-07-20
HARBIN KEJIA GENERAL MECHANICAL & ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the existing method for detecting foreign objects in leaking holes of trucks cannot take into account both detection accuracy and detection time

Method used

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  • Method, system and device for rapid detection of foreign objects in leaking holes of railway wagons
  • Method, system and device for rapid detection of foreign objects in leaking holes of railway wagons
  • Method, system and device for rapid detection of foreign objects in leaking holes of railway wagons

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specific Embodiment approach 1

[0048] Specific implementation mode one: combine figure 1 To describe this embodiment in detail,

[0049] This embodiment is a rapid detection method for foreign objects in leaking holes of railway wagons, including the following steps:

[0050] s1. Obtain the area image img_a of the leakage hole to be detected, and the width and height of the image img_a are w and h respectively;

[0051] s2. Obtain the binary image img_b according to the image img_a of the area of ​​the leakage hole. In the image img_b, the background area other than the oblique line of the locking plate is 0 pixels; the oblique line of the locking plate refers to the broken line groove above the locking plate after being photographed Polyline shadows formed on the image;

[0052] According to the binary image img_b, determine the coordinate values ​​(x1, y1) and (x2, y2) at both ends of the oblique line of the positioning locking plate, and calculate the lateral distance dis_x and the longitudinal distanc...

specific Embodiment approach 2

[0067] This embodiment is a rapid detection method for foreign objects in leaking holes of railway wagons. In this embodiment, the following processing needs to be performed after step s5 and before step s6:

[0068] Divide the background template image evenly in the horizontal direction into two template subimages on the left and right, and make a difference between the two template subimages to obtain the difference result image; check the number of pixels in the difference result image greater than the difference threshold, when the number of pixels is within the background template image If the proportion is greater than or equal to 10%, perform 5x5 Gaussian filter processing on the background template image; otherwise, directly execute s6.

[0069] Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0071] This implementation mode is a rapid detection method for foreign objects in leaking holes of railway freight cars, and the rapid detection method for foreign objects in leaking holes of railway freight cars also includes:

[0072] s9. When the value of x1 is greater than w / 2, flip the image img_a left and right to obtain a flipped image, use the flipped image as a new image img_a, and use the new image img_a to execute steps s1 to s8.

[0073] Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method, system and device for quickly detecting foreign objects in water leakage holes of railway wagons, belonging to the technical field of image detection. In order to solve the problem that the existing method for detecting foreign objects in leaking holes of trucks cannot balance the detection accuracy and detection time. The present invention firstly obtains a rectangular area including the leakage hole part from the whole vehicle image, obtains an accurate location image of the leakage hole by using the oblique line of the locking plate, performs background difference between the location image of the leakage hole and the background template image, and performs denoising processing, Then, binarization processing is performed, and the image after binarization processing is used as a detection image, and the detection of foreign matter in the leaking hole is performed based on the non-zero pixel blocks in the detection image. The invention is used for rapid detection of foreign objects in water leakage holes of railway wagons.

Description

technical field [0001] The invention belongs to the technical field of image detection, and in particular relates to a detection method, system and device for foreign objects in leaking holes. Background technique [0002] In order to ensure the safe operation of railway wagons, it is necessary to carry out daily inspection operations on railway wagons. These include inspections of leaking holes in railway wagons. During the manual inspection of freight cars by the railway, there is a possibility that some maintenance tools or some parts of the car body may fall into the leaking hole. [0003] For a long time, the inspection of leaking holes of railway freight cars has been carried out by manual inspection of images to detect whether there are foreign objects in the leaking hole area. The inspectors are prone to fatigue during the work process, and it is easy to miss and wrongly detect, which is difficult to guarantee. Accuracy; and manual detection efficiency is very low....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06K9/32G06K9/62B61K9/08
CPCG06T7/0002B61K9/08G06V10/25G06V10/751
Inventor 燕天娇
Owner HARBIN KEJIA GENERAL MECHANICAL & ELECTRICAL CO LTD
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