Railway vehicle bolt looseness detection method and system

A bolt loosening and rail vehicle technology, applied in railway vehicle testing, image data processing, instruments, etc., can solve the problems of difficulty in online detection and low detection accuracy, and achieve the effect of saving time, cost and manpower investment.

Inactive Publication Date: 2019-09-17
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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Problems solved by technology

[0006] The present invention aims at the above-mentioned problems such as difficulty in online detection and low detection accuracy existing in existing bolt detection methods, and provides a method and system for detecting bolt looseness in

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  • Railway vehicle bolt looseness detection method and system
  • Railway vehicle bolt looseness detection method and system
  • Railway vehicle bolt looseness detection method and system

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Example Embodiment

[0073] Hereinafter, the present invention will be described in detail through exemplary embodiments. However, it should be understood that without further description, the elements, structures, and features in one embodiment can also be beneficially combined into other embodiments.

[0074] See figure 1 An embodiment of the present invention provides a method for detecting loose bolts of rail vehicles, the steps of which are:

[0075] S1, get the image

[0076] Obtain multiple images of key components of rail vehicles at the bolts under different lighting conditions. See Figure 2a-2c , The acquired image includes the axle box cover (see Figure 2a ), height adjustment valve (see Figure 2b ), bogie frame (see Figure 2c ) And many other images of key parts of rail vehicles containing bolts.

[0077] S2, image processing

[0078] S21, crop the image

[0079] Crop each image to the set size.

[0080] S22, annotate images

[0081] Manually annotate each image to obtain annotated image and...

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Abstract

The invention relates to a railway vehicle bolt looseness detection method and system. The railway vehicle bolt looseness detection method comprises the steps: S1, acquiring a plurality of railway vehicle key part images at bolts under different illumination conditions; S2, cutting each image to a set size; carrying out manual marking on each image; S3, establishing and training a key part positioning network; S4, setting a cutting layer; S5, establishing and training a bolt looseness detection network; and S6, performing image testing. The railway vehicle bolt looseness detection system comprises a multispectral time-sharing light source, an image acquisition device, an image processing module, a key part positioning network building and training module, a cutting layer setting module, a bolt looseness detection network building and training module and a storage and test module. The railway vehicle bolt looseness detection method and system can monitor the bolt state of a key part, can give the specific position information of the loose bolt, are high in the detection speed, can achieve real-time online detection, can improve the detection efficiency, and can improve the detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of railway fault detection, and relates to a rail vehicle bolt loose detection technology, in particular to a rail vehicle bolt loose detection method and system. Background technique [0002] Bolts are commonly used fasteners for rail vehicles such as EMUs, urban rails, and subways. Due to the influence of factors such as corrosion, vibration, and impact during driving, it is easy to cause deformation, loosening, breakage, or fall-off of bolts, resulting in equipment failure. faults, and even cause major safety accidents. Therefore, the loose inspection of bolts has always been an important item in the daily inspection of vehicles. [0003] In order to ensure the safe operation of rail vehicles, the staff need to check the status of the bolts every day. One of the inspection items is to check whether the bolts are loose. Usually, there are hundreds or even more bolts on a car, and there are many trains in...

Claims

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Application Information

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IPC IPC(8): G06T7/00G01M17/08
CPCG01M17/08G06T7/0004G06T2207/10004G06T2207/10024G06T2207/20081G06T2207/20084G06T2207/30164
Inventor 王勇张兴田沈泓周丽萍李明扬臧勐佳赵晓东兰洪财
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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