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Wheel set dimension measurement result credibility interval fuzzy evaluation method based on laser displacement sensor

A technology of measurement results and laser displacement, applied in the direction of rim measurement/measurement, measurement devices, instruments, etc., can solve problems such as labor-intensive, time-consuming, lack of universality, errors, etc., to reduce labor intensity and reduce the number of re-examinations Effect

Inactive Publication Date: 2016-11-16
NANJING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

However, the manual spot check measurement method not only consumes a lot of manpower and time, but also spot check is not universal and has errors
, in addition, how to determine the weight and interval of the evaluation index is also a technical difficulty in the process of evaluating the credibility of the wheel measurement results

Method used

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  • Wheel set dimension measurement result credibility interval fuzzy evaluation method based on laser displacement sensor
  • Wheel set dimension measurement result credibility interval fuzzy evaluation method based on laser displacement sensor
  • Wheel set dimension measurement result credibility interval fuzzy evaluation method based on laser displacement sensor

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Embodiment

[0045] The present invention is based on the interval fuzzy evaluation method of the reliability of the measurement result of the wheel set based on the laser displacement sensor, and the steps are as follows:

[0046] Step 1, establish a fuzzy comprehensive evaluation index system for the wheel set size measurement results based on the laser displacement sensor, such as figure 1 As shown, the factors that affect the measurement results of the wheel set size based on the laser displacement sensor include: the characteristics of the data collected by the laser displacement sensor P 1 , the calculation characteristic P used when calculating the wheel set parameters 2 and the engineering environment characteristics P when the wheel set size system works 3 ; Acquisition data characteristic P 1 The total number of frames P collected by the laser displacement sensor each time 11 and the number of valid points P in each frame 12 Decision; Calculation characteristic P 2 It includ...

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Abstract

The invention discloses a wheel set dimension measurement result credibility interval fuzzy evaluation method based on a laser displacement sensor. First of all, a fuzzy integrated evaluation index system is established according to factors affecting wheel set dimension measurement results, and according to requirements for accuracy of the measurement results, wheel set dimension measurement evaluation grades are set; then, through calculating interval properties of membership grades and weight vectors of the measurement result influential factors and analyzing nonlinear features of fuzzy matrix weighting operation, relative dominance of a fuzzy mathematic theory and an interval number vector matrix is introduced, and a wheel set dimension measurement result credibility secondary fuzzy integrated evaluation calculation model is established; and finally, according to the dominance, wheel set dimension measurement result credibility grades are analyzed and determined. According to the method, credibility of a wheel set measurement result can be reasonably evaluated, and the operationality is quite high.

Description

technical field [0001] The invention belongs to the technical field of railway wheel detection, in particular to an interval fuzzy evaluation method for the credibility of wheel set size measurement results based on laser displacement sensors. Background technique [0002] Wheel sets are an important guarantee for the safe operation of urban rail trains. The measurement method of wheel set size based on laser displacement sensor is a commonly used and advanced technology for wheel set size measurement of urban rail vehicles. It is introduced in "Development of Dimension Online Measurement System". Since the laser sensor is used to scan the wheel set, the measurement result of the wheel set will be affected by the light intensity, the number of frames collected by the laser sensor, etc. Therefore, it is necessary to classify the reliability of the measurement results, so as to judge whether the wheel set needs to be repaired or not according to the measurement results. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/02B61K9/12
CPCB61K9/12G01B11/00G01B11/02
Inventor 王露陈双杨志李婷邢宗义
Owner NANJING UNIV OF SCI & TECH
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