Dynamic calibration system and method for inertial orbit measurement instrument and application of dynamic calibration system and method

Abstract

The invention discloses a dynamic calibration system and method for an inertial orbit measurement instrument and application of the dynamic calibration system, and the dynamic calibration system is based on the combination of a double-speed sensor and a vehicle-mounted antenna array, and comprises a track, a track gauge sensor, an inertial sensor and a differential base station, the center position of each ground antenna of the vehicle-mounted antenna array is provided with a corresponding engineering coordinate system coordinate; the data of the same ground antenna and the data of at least two differential base stations are solved; the track adopts a speed sensor for speed measurement and is matched with a track gauge sensor for course angle deviation measurement; the speed change and the angle change are used for acceleration and angular speed calibration of the inertial sensor; and the differential base station realizes wireless communication with the vehicle-mounted antenna array through a wireless communication link. According to the invention, the problem that static staying is required for calibration of the inertial orbit measuring instrument is solved, the problem that static calibration is required before measurement in the prior art is avoided, and dynamic calibration of the inertial orbit measuring instrument is realized.

Description

technical field [0001] The invention belongs to the technical field of railway track measurement, and relates to a dynamic calibration method of an inertial track measuring instrument and its application, in particular to a dynamic calibration method of an inertial track measuring instrument based on a combination of dual speed sensors and a multi-antenna array and its application. Background technique [0002] The track measuring instrument is a special equipment for railway measurement, which is used to measure the geometric parameters inside and outside the track. The traditional inertial track measuring instrument (referred to as "measuring trolley") requires absolute calibration before measurement. The main calibration methods are: [0003] 1. Total Station Calibration [0004] (1) Input the CPⅢ results into the total station, first check the CPⅢ control points in the survey area to ensure that the control point data (plane coordinates and elevation) are correct, and c...

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Problems solved by technology

[0017] In addition, the above-mentioned existing technologies cannot avoid the constraints of the weather or the measurement environment on the measurement, and increase the process of static calibration, thereby greatly increasing the initialization time of the orbit measurement. It cannot be directly output, which greatly reduces the measurement efficiency

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