Method and system for city rail train wheel rim parameter online detection

A detection method and technology of urban rail vehicles, applied in the field of traffic safety engineering, can solve problems such as difficult to guarantee, high system complexity, strong reflection phenomenon, etc., and achieve the effect of low cost

Active Publication Date: 2016-11-09
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Patent CN204674616U (a dynamic detection device for the size of train wheel sets) uses lasers and area array CCD cameras to realize the automatic detection system of the geometric parameters of the wheel sets. Blurred edges make detection difficult
In addition, due to too many sensors, the complexity of the system is large, and it is difficult to ensure high reliability

Method used

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  • Method and system for city rail train wheel rim parameter online detection
  • Method and system for city rail train wheel rim parameter online detection
  • Method and system for city rail train wheel rim parameter online detection

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Embodiment

[0055] combine Figure 2 ~ Figure 4 , The two laser displacement sensors adopt PSD-based 1D laser displacement sensors. The installation angles between the outer laser displacement sensor and the horizontal plane and the rail direction are both 45°, and the inner laser displacement sensor is installed at an angle of 40° to the horizontal plane.

[0056] According to the method of step 3, the vehicle speed is specified to be 5km / h and passes through the equipment. Firstly, the radius of the apex circle of the wheel is calculated to be 445.8863mm, and the lowest point of the wheel rim is output by the outer laser displacement sensor as the center of the circle. The height of the center relative to the rail surface is 418.5536mm. According to the output value of the outer laser sensor at different times and the position of the wheel axis calculated by the magnetic steel, the radius corresponding to the irradiation point of the outer laser displacement sensor at different times is ...

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Abstract

The invention discloses a method and a system for city rail train wheel rim parameter online detection. Sensors are firstly laid; data of the sensors are obtained and processed; radiuses in different areas of a wheel are calculated; curve fitting is performed; and the rim height and the rim thickness of the wheel are calculated according to an obtained wheel two-dimensional profile diagram. The invention is low in cost, simple in principle and convenient to operate, can detect the rim thickness and the rim height by only two laser displacement sensors and three magnetic steel pieces, and has advantages of online non-contact measurement and the like, thereby providing an effective solution scheme for online measurement of the wheelset profile.

Description

technical field [0001] The invention belongs to the technical field of traffic safety engineering, in particular to an on-line detection system and method for wheel rim parameters of urban rail trains. Background technique [0002] With the rapid development of my country's urban rail transit and the opening and operation of multiple lines, the safety problems of train online operation are becoming more and more significant. The wheel set is the part of the locomotive that is in contact with the rail. The wheelset ensures the running and steering of the locomotive on the rails, bears all the static and dynamic loads from the locomotive, and transmits it to the rails, and transmits the load caused by the uneven track to the components of the locomotive. In addition, the driving and braking of the rolling stock also work through the wheelset. Therefore, the condition of the wheel set is directly related to the running quality and safety of the train, and the real-time monito...

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Application Information

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IPC IPC(8): G01B11/06G01B11/24
CPCG01B5/0025G01B11/0608G01B11/24
Inventor 黄文邢宗义
Owner NANJING UNIV OF SCI & TECH
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