Measuring method for dynamic envelope line of high-speed train

Abstract

The invention discloses a measuring method for a dynamic envelope line of a high-speed train. The measuring method comprises the following steps of: establishing a track center coordinate system by using a precise target and a laser tracker; solving a transformational relation between the track center coordinate system and a measuring system coordinate system; turning on a reflective photoelectric switch to enter an automatic trigger measuring state; when the high-speed train enters within a preset measuring range, receiving a synchronous trigger signal by a high-power linear line laser and two high-speed cameras; projecting line structure light by the high-power linear line laser to construct measuring characteristics on the surface of a train body of the high-speed train; synchronously capturing a measuring characteristic image by the two high-speed cameras; processing the measuring characteristic image and resolving measured information capable of reflecting dynamic deviation of the high-speed train; and fusing the measured information of the dynamic deviation, at two sides, of the high-speed train to obtain the dynamic envelope line in the running process of the high-speed train. The measuring precision is improved, subjective valuing is avoided, a technical means is provided for evaluating safety performance of the high-speed train and reliable data support is provided for assigning dynamic load gauge of a high-speed railway.

Description

technical field [0001] The invention relates to a dynamic envelope, in particular to a method for measuring a dynamic envelope of a high-speed train. Background technique [0002] The dynamic limit is a contour based on the center line of the track line and the rail surface, and it is stipulated that no matter how much deviation occurs during the safe running of the train, it must always be within the range of the contour. The dynamic envelope is defined as the maximum limit profile caused by various unfavorable factors during the operation of the vehicle. The dynamic envelope is the main basis for formulating the dynamic limit. Accurately obtaining the dynamic envelope is not only an important content in the process of vehicle design, manufacture and operation, but also an important guarantee for safe driving. [0003] At present, calculation methods are commonly used at home and abroad to obtain the dynamic envelope. For example, based on the design contour control point ...

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Problems solved by technology

[0005] The parameters involved in the calculation process of the above calculation method are mostly subjective values, and all random factors cannot be taken into account, such as random factors such as track irregularities, train manufacturing defects and extreme bad weather, and the non- The value of the random factor is also generally taken as a limit value or an empirical value. The accuracy of the obtained dynamic envelope is not high, and the high-speed train cannot be measured in real time, and the calculation results cannot truly and objectively reflect the actual operation of the high-speed train.

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