K-band radar-based track non-contact deformation high-precision measurement method

Abstract

The invention discloses a K-band radar-based track non-contact deformation high-precision measurement method. The method comprises the following steps of: fully utilizing a means of combining K-band radar absolute distance measurement and phase detection to respectively determine the distance from a K-band radar to a steel rail and the displacement deformation of the steel rail, measuring the distance s from the radar to the steel rail according to the delay between electromagnetic wave emission and electromagnetic wave reception of the radar, then monitoring the phase change of the received electromagnetic wave to obtain the real-time change of the monitored steel rail and the micro-deformation from the steel rail to the center point of the radar, and then obtaining the micro-deformationof a track by calculating the horizontal and vertical components of the micro-deformation of the steel rail and the center point of the radar. According to the method, all-weather track deformation monitoring is achieved, steel rails of different tracks can be automatically distinguished for a plurality of railway track concentration areas, the high-precision measurement characteristic and the portability characteristic of the K-band radar are fully utilized, and the measurement precision of track deformation monitoring is improved.

Description

technical field [0001] The invention belongs to the field of construction engineering measurement, and in particular relates to a non-contact deformation high-precision measurement method of a track based on a K-band radar. Background technique [0002] At present, with the development of high-speed railways, the running speed of trains has increased year by year, from the initial 120Km / h to 600Km / h. However, the high train speed puts forward higher requirements on the railway track. For example, the distance between high-speed railway tracks must be controlled within the accuracy range of 1mm. In addition, during the operation of high-speed railways, the settlement of steel rails needs to be strictly controlled. . [0003] At this stage, the detection of high-speed rail track deformation mainly relies on manual regular inspections. Manual inspections need to be carried out during a short window period after the train stops at night, which increases the intensity of manual ...

AI Technical Summary

Problems solved by technology

For a single track, radar technology can quickly distinguish the deformation of the rail to be measured, but for areas where multiple tracks exist at the same time, using K-band radar for deformation measurement cannot quickly distinguish the rail corresponding to each track, requiring on-site positioning by personnel, and the measurement accuracy Not high enough, which increases the complexity of monitoring and the difficulty of implementation

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