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Measurement method for underframe coverage of urban rail car body

A measurement method and car body technology, applied in railway vehicle testing, program control, instruments, etc., can solve problems such as difficult to measure efficiency, error measurement, etc., and achieve a good overall effect

Active Publication Date: 2021-02-05
DALIAN JIAOTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the underframe coverage of urban rail vehicles, so as to overcome the problems in the prior art that it is difficult to measure the error of the underframe of large-scale urban rail vehicles and the problem of low measurement efficiency

Method used

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  • Measurement method for underframe coverage of urban rail car body
  • Measurement method for underframe coverage of urban rail car body
  • Measurement method for underframe coverage of urban rail car body

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Embodiment Construction

[0017] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0018] The principle of the group dynamic programming method is to decompose the multi-stage problem to be solved into several independent single-stage problems, and then subdivide these single-stage problems into several interrelated sub-problems, solve these sub-problems, and finally summarize get a global solution.

[0019] Renishaw applies a high-precision sensor to the machine tool probe. The machine tool probe consists of two parts: the probe and the receiver, which are optically transmitted by infrared rays. When the machine tool touches the workpiece, the receiver receives the touch information of the probe and feeds it back to the machine tool system, and completes the error measurement ...

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Abstract

The invention relates to the technical field of urban rail train manufacturing, and specifically discloses a method for measuring coverage of an urban rail car body chassis, including storing all chute points in a chute point collection, and using the first chute point to be measured as a compensation point, Control the machine tool probe to cover, obtain the nearest chute point to be measured from the current compensation point through the machine tool probe, calculate the Euclidean distance between the current compensation point and the nearest chute point to be measured, and calculate the diameter of the compensation area circle with the machine tool probe For comparison, take the center of the connection line between the current compensation point and the nearest chute point to be measured as a new compensation point, control the machine tool probe to cover, obtain the chute point to be measured closest to the new compensation point through the machine tool probe, and calculate the current The Euclidean distance between the compensation point and the nearest chute point to be measured is compared with the radius of the compensation area circle of the machine tool probe. Every time the machine tool probe completes the coverage of the chute point, it extracts the covered chute point from the chute point. Chute points, until the chute point set is an empty set, the operation ends.

Description

technical field [0001] The invention relates to the technical field of urban rail train manufacturing, in particular to a method for measuring the coverage of an urban rail car body underframe. Background technique [0002] The manufacturing efficiency of urban rail vehicle bodies is one of the main indicators for evaluating the benefits of urban rail train manufacturing enterprises. Among them, the processing efficiency and machining accuracy of the urban rail car body chassis have a particularly prominent impact on the manufacturing efficiency of the urban rail car body. In the case of meeting the processing requirements of the urban rail car body chassis, it is necessary to measure and compensate the clamping error before processing to improve the processing efficiency and precision of the urban rail car body chassis. At the present stage, the numerical control program modularization has been formed for the error measurement of the underframe chute of the urban rail car ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/08G05B19/401
CPCG01M17/08G05B19/401
Inventor 郑晓军司昊童小英
Owner DALIAN JIAOTONG UNIVERSITY
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