High-speed rail track smoothness detection method based on satellite positioning and inertial navigation
A satellite positioning and detection method technology, which is applied to railway inspection vehicles, railway vehicle shape measuring devices, railway car body parts, etc., can solve the problems of long wave irregularity, low measurement accuracy, and inability to use track adjustment, etc., to achieve low maintenance costs , reduce economic costs, improve the effect of detection work efficiency
Active Publication Date: 2021-03-02
山东北斗华宸导航技术股份有限公司 +1
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Problems solved by technology
[0006] There are following disadvantages in the prior art: (1) measurement efficiency is low;
[0008] (3) Low measurement accuracy;
[0009] (4) Limited by various technologies, it cannot be used for track adjustment, especially for long-wave irregularity track adjustment
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Embodiment 1
[0029] The invention provides a high-speed rail track smoothness detection method based on satellite positioning and inertial navigation, comprising the following steps:
[0030] Step (1) Obtain real-time GNSS satellite data from multiple base stations built along the fixed track, and calculate the precise coordinates of the base station;
[0031] Step (2) The track inspection car is placed on the track, observes for a certain period of time, and obtains synchronously observed GNSS satellite data;
[0032] Step (3) Use the data measured by the track gauge sensor, sleeper identification device, odometer, and inertial navigation system on the track inspection trolley, combined with the satellite data in steps (1) and (2), to calculate the accuracy of the track feature points. Coordinates to calculate the external geometric parameters of each sleeper; use the external geometric parameters and the data on the track inspection trolley to calculate the internal geometric parameters ...
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The invention relates to the field of smoothness detection of high-speed rail tracks, in particular to a high-speed rail track smoothness detection system and method based on satellite positioning and inertial navigation. The present invention can obtain high-precision external geometric parameters of the track by setting up a GNSS reference station on the CPII and laying out a GT-CORS station network. Through the track gauge detection device, sleeper identification, odometer and other devices on the rail inspection vehicle, combined with the accurate coordinate results of the three GNSS antennas, the track parameters can be calculated to guide precise track adjustment. Large-scale satellite positioning and monitoring point networking method millimeter-level joint calculation, three-antenna GNSS track inspection equipment short baseline fast, millimeter-level calculation method reaches 1-2mm in the plane, and the accuracy of elevation measurement error is ±2.5mm, getting rid of the CPIII Dependence, thus increasing the track detection speed from the original 100m / h to 1000m / h, greatly improving the efficiency of track external parameter detection, significantly reducing economic costs, and broad technological development and application prospects.
Description
technical field [0001] The invention relates to the field of smoothness detection of high-speed rail tracks, in particular to a method for detecting smoothness of high-speed rail tracks based on satellite positioning and inertial navigation. Background technique [0002] With the rapid development of my country's high-speed railways and the continuous improvement of operating speed, the requirements for the smoothness of high-speed railway tracks are also getting higher and higher. The track smoothness of my country's high-speed railways adopts a detection method that combines rough detection by moving inspection vehicles and precise detection by track inspection trolleys. Dynamic inspection vehicles can quickly diagnose the overall condition of the line, determine the approximate section and deformation level of the detected track deformation, and then Use the track inspection trolley to carry out precise measurement and track adjustment in the diseased area. [0003] At pr...
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IPC IPC(8): B61K9/08B61D15/08
CPCB61D15/08B61K9/08
Inventor 丁志刚过静珺白征东曾润国贾庆鲁周百胜王增岩刘涌焦杰
Owner 山东北斗华宸导航技术股份有限公司