Method and device for detecting looseness of rail fastener in high-speed dynamic real-time manner

A real-time detection and fastening technology, which is applied to railway car body parts, transportation and packaging, railway auxiliary equipment, etc., can solve the problems of detection speed and detection accuracy to be improved, and achieve real-time processing requirements, easy real-time processing requirements, Intuitive effect of test results

Inactive Publication Date: 2014-11-05
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current detection methods still need to be improved in detection speed and detection accuracy

Method used

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  • Method and device for detecting looseness of rail fastener in high-speed dynamic real-time manner
  • Method and device for detecting looseness of rail fastener in high-speed dynamic real-time manner
  • Method and device for detecting looseness of rail fastener in high-speed dynamic real-time manner

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0034] The high-speed dynamic real-time detection method for loose rail fasteners in this embodiment is a detection method based on image processing, and a TDI line scan camera is used to obtain images of rail fasteners. Such as figure 2 The schematic diagram of the working principle of the TDI line scan camera is shown, using the characteristic of TDI CCD to expose and accumulate the same scene multiple times. Multiple exposures are equivalent to prolonging the exposure duration by at least several times the TDI integral level, that is: total exposure duration = scan The time of a ...

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Abstract

The invention relates to a method and device for detecting the looseness of a rail fastener in a high-speed dynamic real-time manner. The method comprises the following steps: a TDI line scanning camera transmits a collected image to an industrial control computer through a high-speed collecting card; an object which needs to be detected is determined; the industrial control computer cuts apart and clips the image, extracts the image of the fastener, and preprocesses the image; the image spectrum of the fastener is obtained; the image spectrum, which is obtained in a real-time manner, of the fastener is compared with the image spectrum, which is well stored in the industrial control computer, of the fastener, and defect recognition is performed; if a defect exists, the industrial control computer sends a warning that the fastener is loose to a display, and GPS positioning information is combined to obtain the position of a fault point; and the data of a testing result are recorded. The device comprises the TDI line scanning camera, the industrial control computer, the display, train speed detection equipment, a train mileage calculator, a GPS positioning instrument and a light source assembly. Compared with the prior art, the method disclosed by the invention has the advantages of high detection accuracy, simple image processing algorithm, visualized testing result and the like.

Description

technical field [0001] The invention relates to a detection method and a detection device based on image processing, in particular to a high-speed dynamic real-time detection method and a device for loose rail fasteners. Background technique [0002] Railway rail fasteners are parts used to connect rails and sleepers (or other types of under-rail foundations) on the track. Railway fasteners are important components related to railway safety. If the rail fasteners are loose or damaged, the rails will not be fully fixed, which will cause the train to bump and even derail during operation. [0003] When the train passes by, it continuously impacts the rails, causing the rails to vibrate, and the vibration of the rails is transmitted to the sleepers and roadbed through the fasteners. Among them, the bolts, nuts and elastic bars on the fasteners are prone to loosening due to long-term exposure to high-frequency vibration shocks. When the looseness is severe, they will shake when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/08
Inventor 陈晓丽
Owner SHANGHAI UNIV OF ENG SCI
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