Non-contact type dynamic measuring method for wheel diameter based on laser and method thereof

Abstract

The invention discloses a non-contact dynamic measuring device for a wheel diameter based on laser and a method thereof. The measuring device consists of a laser displacement sensor, a wheel positioning sensor or two laser displacement sensors; the two sensors are arranged along the direction of a steel rail. When the two laser displacement sensors are applied, light spots of irradiation laser can directly irradiate onto two opposite surfaces of the measured wheel; the two laser displacement sensors respectively and continuously measure the distance between each sensor and corresponding pointon a tread of the wheel; the reading data of distance in each laser displacement sensor is recorded when the sum of the distance measured by the two laser displacement sensors is basically unchanged,to calculate the diameter of the train wheel. The invention requires two sensors at most, and measurement principle is simple and practical.

Description

technical field [0001] The invention relates to a method for non-contact dynamic measurement of the diameter parameters of train wheels based on laser measurement technology, which belongs to the technical field of optical measurement. Background technique [0002] With the development of my country's railway industry, the speed of trains continues to increase, and people pay more and more attention to the safety of vehicle operation. The high-speed running of the train will intensify the wear and tear between the tread of the train wheel and the rail, resulting in changes in the diameter of the wheel, affecting the cooperation between the wheel and the track, and thus affecting the safety of the train. Therefore, after a certain period of time, the train wheels will be regularly inspected, and the wheels whose parameters exceed the limit need to be repaired or scrapped, otherwise it will bring hidden dangers to the safe operation of the train. [0003] In the regular inspe...

AI Technical Summary

Problems solved by technology

However, the instrument still uses the contact measurement method, which causes a certain amount of wear on the measuring instrument and the wheel, and the measurement point is easily affected by oil and debris on the wheel diameter.

[0006] To sum up, the existing contact measurement technology using calipers or calipers generally has the following disadvantages: (1) relying on manual operation, the measurement efficiency is low, and it is not easy to find problems in time; (2) the measurement accuracy is easily affected by the external environment; ( 3) The wheel must be disassembled, and the measurement cycle is long; (4) Because the operating space on site is too small, this kind of contact measurement technology is generally not suitable for measuring the diameter of the wheel on site

However, the existing non-contact dynamic measurement technology for wheel diameter still has the following problems to be solved: 1. The measuring device is too complicated and difficult to install and debug; 2. The measurement accuracy is not high; 3. The measurement response speed is not high

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