Track detecting system and method based on integrated navigation

Abstract

The invention discloses a track detecting system and method based on integrated navigation. The track detecting system and method accurately and rapidly detect a railway track. A wireless navigation base station is established in a GNSS signal shielding zone; an integrated navigation device receiving GNSS and / or wireless navigation signals is integrated into track detecting equipment; position drifting and posture drifting of a gyro sensor are eliminated through GNSS and / or wireless navigation, positioning and track plotting, and therefore the divergence problem of track detecting accuracy is solved; and a self-adaption smoothing compiling high-pass filter is adopted for eliminating influences such as changes of the slowly-changing track elevation with an extremely low frequency and a large value, changes of the filter-out gradient and superelevation on a curve of the gyro sensor; and the system integrates a displacement sensor, an inclination sensor, the gyro sensor and the like of the track detecting equipment, a mileage counter and the added integrated navigation device, a data fusion technology is adopted, track internal geometric parameters, coordinates, elevations and 150-300 m base length irregularity are independently detected, and the detecting speed is higher than 4 km / h, so that the bottleneck problems of track detecting in operation maintenance of high-speed and common-speed railways are solved.

Description

technical field [0001] The invention relates to the technical field of (high-speed) railway track detection, in particular to a system and method for accurately and quickly detecting internal and external geometric parameters of the track and 150m-300m baseline length irregularities installed on static and dynamic detection equipment or devices of the track. Background technique [0002] The target value of ordinary railway speed is low, and the requirements for track smoothness are not high. Railway engineering departments often use manual string measurement and track rulers to maintain lines. With the development of high-speed railways, it was found in the 200km / h speed-up reconstruction of existing railway lines that the radius of the plane circular curve of the normal-speed railway differs from the design value by several hundred meters, and the long curve with a large radius becomes a combination of many circular curves with different radii. The length of the curve and ...

AI Technical Summary

Problems solved by technology

It detects the dynamic internal geometric parameters of the track, and can assess the left and right rail height, left and right rail direction, level, gauge, gauge change rate, triangular pit, curve superelevation and curvature change rate and other indicators, among which the height and direction can be detected to the maximum 60m long-wave smoothness (equivalent to a 120m baseline length Changping), but it cannot detect the roughness index of the 150m-300m baseline length required by high-speed railways between the plane and longitudinal section, and cannot obtain external coordinates and elevations of track measuring points. Geometric parameters

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