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Locomotive wheel diameter automatic calibration system and method based on satellite positioning

A satellite positioning and automatic calibration technology, applied in automatic systems, beacon systems using radio waves, positioning and other directions, can solve the problems of large human influence, large errors, large construction and maintenance costs, etc., to reduce train positioning errors, Guaranteed safe effect

Active Publication Date: 2009-02-04
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the semi-automatic block section, the driver can manually press the adjustment button to adjust the wheel diameter when passing the signal machine for entering or exiting the station. However, this method is greatly affected by human influence and produces large errors.
In addition, on the lines equipped with balises, it is also possible to combine balises to achieve wheel diameter calibration, but at present, there are few lines equipped with balises in China, and the construction and maintenance costs brought by the deployment of balises are very large

Method used

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  • Locomotive wheel diameter automatic calibration system and method based on satellite positioning
  • Locomotive wheel diameter automatic calibration system and method based on satellite positioning
  • Locomotive wheel diameter automatic calibration system and method based on satellite positioning

Examples

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Embodiment 1

[0027] Example 1 as figure 2 As shown, the locomotive wheel diameter automatic calibration system based on satellite positioning includes a main processor, a positioning module, a map matching module, a data recording module, a communication module and a map database. During the operation of the train, the positioning module receives the position information of the train through the satellite positioning receiver, calculates the position information to obtain the current latitude and longitude information of the locomotive, and converts it into geodetic coordinate information according to actual needs. The positioning information is matched with the map through the map matching module, and the main processor reads the digital map from the map database, and searches for matching points corresponding to the positioning coordinates on the digital map to obtain the position of the train on the map. The main processor obtains the wheel diameter calibration information through rele...

Embodiment 2

[0028] Example 2 image 3 It is a flow chart of the method for automatically calibrating the wheel diameter of a locomotive based on satellite positioning according to the present invention. The locomotive wheel diameter automatic calibration method based on satellite positioning comprises the following steps: first, determine the position of the wheel diameter calibration key point, set up the map database of the wheel diameter calibration key point, in this embodiment the establishment of the map database can be established manually or through Satellite positioning is automatically established; then, by detecting the number of wheel rotations of the train passing between two calibration points, the actual distance between two key points, and combining satellite positioning to determine whether the train has reached the key point of wheel diameter calibration, thereby realizing wheel diameter calibration . In this example, if image 3 As shown, the specific process steps to...

Embodiment 3

[0035] Embodiment 3 In the above step 1, the mileage information sent by the odometer is synchronized with the satellite positioning information. Figure 4 It is a schematic diagram of the method for synchronizing satellite positioning information and odometer information according to the present invention. As shown in the figure, after the system is initialized, start the counter; the output of the odometer is a pulse signal, and the output frequency of the satellite positioning receiver is per second Once, so consider counting the pulse signal of the odometer in units of 1 second. When counting, the 1pps signal sent by the satellite positioning receiver is used as the reference, and the number of pulses between the arrival of the two 1pps signals is recorded to obtain the operation of the train. Speed; when the 1pps signal comes, extract the value in the counter, and restart counting after clearing the counter to realize the synchronization function.

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Abstract

The invention discloses an automatic calibration system of the diameter of a vehicle wheel based on satellite positioning, and a method thereof. The system of the invention comprises five modules and a map database, wherein, the map database is used for storing relevant information of train operation lines; the five modules are respectively a positioning module, a map matching module, a data recording module, a communication module and a main processor. By introducing a satellite positioning technology, the automatic calibration of the diameter of the vehicle wheel in a positioning system is realized by GNSS positioning information so as to reduce positioning errors caused by the diameter change of the wheel due to the wheel wear, thereby improving the precision of the train positioning.

Description

technical field [0001] The invention relates to a satellite positioning-based locomotive wheel diameter automatic calibration system and a method thereof, which belong to the field of rail transportation, in particular to the technical field of vehicle positioning in rail transportation. Background technique [0002] Train positioning plays a vital role in train operation. At present, the train positioning technologies that are actually put into use include: odometer, track circuit, query transponder, inertial sensor, leaky cable, Doppler radar, etc. Among them, the odometer is the most commonly used train positioning method, which has the advantages of low cost, simple Practical and other features. The method of using the odometer to locate the train is to calculate the mileage traveled by the train according to the cumulative number of rotations of the recorded wheels multiplied by its circumference. Since the track line of the train is one-dimensional, the specific posi...

Claims

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Application Information

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IPC IPC(8): B61L25/02G01S5/02G01S1/02B61L27/04
Inventor 王剑张辉蔡伯根
Owner BEIJING JIAOTONG UNIV
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