Dropping wheel type wheel out-of-roundness measurement device and method

A technology of roundness measurement and drop-wheel type, which is applied in the direction of measuring device, railway vehicle shape measuring device, optical device, etc., can solve the problem of high cost, and achieve the effect of convenient portability, high measurement accuracy and simple structure

Inactive Publication Date: 2016-12-14
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] Patent 1 (Urban rail vehicle wheel out-of-roundness detection device and method based on laser displacement sensor, application number: 201310556634.0 Application date: 2013.11.11) discloses an urban rail vehicle wheel out-of-roundness detection de

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  • Dropping wheel type wheel out-of-roundness measurement device and method
  • Dropping wheel type wheel out-of-roundness measurement device and method
  • Dropping wheel type wheel out-of-roundness measurement device and method

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Embodiment 1

[0059] combine Figure 1~5 In the structure shown, the distance L between the laser origin and the inner end face of the wheel 1 =70mm, this value is a fixed value, according to the definition of the rolling circle of the wheel, the distance L between the center line of the positioning device 1 and the origin of the laser 2 =434mm.

[0060] The sampling frequency of the sensor is set to 50Hz, the wheel rotates once, the sampling points of the sensor are 500, and the raw data output by the sensor y i =[34.302,34.170,34.478...], such as Figure 6 As shown, the actual radius value of the wheel can be calculated, such as Figure 7 shown.

[0061] r i =434-y i

[0062] The wheel rotation angle between every two sampling points of the sensor is:

[0063] θ = 2 π 500

[0064] According to the geometric relationship, the sampling point of the sensor is transformed into the horizont...

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Abstract

The invention discloses a dropping wheel type wheel out-of-roundness measurement device and method. The device comprises a positioning device, an end cover, a sensor bracket and a laser displacement sensor, wherein the positioning device is provided with three locating pins to position the center of a circle of a wheel; the sensor bracket is of a step shape and comprises longitudinal beams of which two ends are in parallel, and a cross beam used for vertically connecting the longitudinal beams, wherein the tail end of one longitudinal beam is fixedly connected with the positioning device, the other longitudinal beam is tightly attached to the outer end surface of the wheel, and the tail end of the longitudinal beam is provided with a laser displacement sensor; the end cover and the positioning device are connected through a thread, and a distance between the laser original point of the laser displacement sensor and the inner end surface of the wheel is L1; the distance between the center axis of the positioning device and the laser original point is L2. The wheel rotates for one circle at a constant speed under the driving of external force, and a rolling circle on a wheel tread is subjected to polynomial fitting so as to determine the wheel out-of-roundness situation. The device is simple, convenient in carrying and low in cost, the out-of-roundness measurement can be carried out on the wheel under a dropping wheel situation, and a technical basis is provided for the spinning repair of the wheel.

Description

technical field [0001] The invention relates to the technical field of rail transit safety monitoring, in particular to a device and method for measuring out-of-roundness of a drop-wheel type wheel. Background technique [0002] As one of the most basic and important components of a train, the train wheel set bears the weight of the entire train and ensures the normal operation of the train on the track. It is the key detection object in the safety inspection. During the operation of the train, the wheelset and the rail are constantly rubbing against each other, and the state of the wheel-set tread is also constantly changing. When the wheel-rail contact relationship is not good, the wheel tread is not round, which affects the normal and safe operation of the train. [0003] At present, the detection methods for wheel out-of-roundness at home and abroad are divided into static detection and dynamic detection. At present, domestic static detection uses manual observation and...

Claims

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Application Information

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IPC IPC(8): G01B11/24B61K9/02
CPCG01B11/2408B61K9/02
Inventor 蒋杰邢宗义
Owner NANJING UNIV OF SCI & TECH
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