A Method for Image Recognition of Closing Faults of Truncated Plug Door Handle

An image recognition and handle technology, applied in character and pattern recognition, instruments, calculations, etc., can solve problems such as low detection efficiency and easy fatigue, and achieve the effect of improving accuracy, saving time, and meeting real-time requirements.

Active Publication Date: 2021-08-27
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 purpose of the present invention is to solve the problem of low detection efficiency due to the fatigue of the detection personnel when manually detecting the truck in the prior art, and propose a method for image recognition of the faulty image of the handle of the truncated plug door

Method used

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  • A Method for Image Recognition of Closing Faults of Truncated Plug Door Handle
  • A Method for Image Recognition of Closing Faults of Truncated Plug Door Handle
  • A Method for Image Recognition of Closing Faults of Truncated Plug Door Handle

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Experimental program
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specific Embodiment approach 1

[0035] Specific implementation mode one: combine figure 1 This embodiment is described. In this embodiment, a fault image recognition method for closing a truncation plug handle includes:

[0036] Step 1. Obtain the truncated plug part image and the image not containing the truncated plug part, take the truncated plug part image as a positive sample, and mark it as 1, and the image that does not contain the truncated plug part as a negative sample, mark it as 0, and set The positive and negative samples and corresponding labeled files are divided into training set and test set;

[0037] Step 2, normalize the training set in step 1, and extract the HOG feature vector of the normalized training set; input the extracted HOG feature vector into the SVM linear classifier, and use the SVM linear classification The device trains the feature model of the truncated plug door part;

[0038] Step 3, determine whether there is a truncated plug part in the truck to be detected, if it exi...

specific Embodiment approach 2

[0051] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is that step three also includes:

[0052] When the number of sub-image blocks recorded as 1 exceeds half of the total number of image blocks, the gradient in the horizontal direction of the sub-image at the handle position is further calculated to obtain a gradient map in the horizontal direction. The gradient map is as follows Image 6 As shown on the left, and calculate the coordinate points of the upper boundary and the lower boundary of the gradient map, respectively constitute the set of coordinate points of the upper boundary and the set of coordinate points of the lower boundary; a straight line, such as Image 6 As shown on the right; if there are double lines, it is considered that there is an upper and lower boundary contour of the handle, and the angle between the two straight lines is calculated. If the angle is within the angle threshold r...

specific Embodiment approach 3

[0056] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that step three also includes:

[0057] If the two straight lines do not exist completely or the angle between the two straight lines is not within the angle threshold range, then there is no upper and lower boundary contour of the handle, and then the handle position sub-image is binarized to calculate the maximum connected area of ​​the binary image , the largest connected region such as Figure 7 As shown; set the range of handle structure characteristic parameters according to the maximum connected area; satisfy the range of handle structure characteristic parameters of the outer contour of the maximum connected area, then there is a handle, which is the handle closing fault; if the handle structure characteristic parameters are not satisfied range, there is no handle, which is normal.

[0058] In practice, in order to identify the handlebar closing fault more co...

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Abstract

The invention relates to an image recognition method for a closing fault image of a truncation cock handle, which belongs to the field of image recognition. The invention solves the problem that the detection efficiency is low due to the fatigue of the detection personnel when the truck is manually detected. The present invention obtains images of truncated plug parts and images not containing truncated plug parts, and correspondingly marks, divides positive and negative samples and marked files into training set and test set; performs HOG feature extraction on the training set, and utilizes the extracted features The figure and SVM are used to train the feature model of the truncated cock part, and the specific position of the truncated cock is located through the trained model, the handle position sub-image is intercepted from the truncated cock part image, and the handle in the handle position sub-image is judged Whether it exists, if there is a handle, it means that the handle of the truncation cock is closed, and if there is no handle, it is normal. The invention is used for detecting the closing fault of the truncation cock handle.

Description

technical field [0001] The invention belongs to the technical field of image detection, and in particular relates to a fault image recognition method for closing a truncation plug handle. Background technique [0002] The cut-off plug handle is an important part of the brake system during the operation of the truck. It is located at the bottom of the truck. It is installed on the brake branch pipe and is used to open and close the pressure air passage between the distribution valve and the train pipe. Normally, the handle is open. The location, the handle is not visible on the image captured by the camera, it is hidden behind the truncated plug part. The handle of the cock door must be opened when braking, and when the brake breaks down, it is closed in order to cut off the compressed air supply path of the brake main pipe. If the plug handle is closed, the brake pipeline will not communicate with the main pipeline, and the truck will lose its braking ability at this time, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62G06K9/46
CPCG06V10/462G06F18/2411G06F18/214
Inventor 金佳鑫
Owner HARBIN KEJIA GENERAL MECHANICAL & ELECTRICAL CO LTD
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