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A method for measuring track geometric parameters at low speed and a compound measurement method

A geometric parameter and track technology, applied in the field of low-speed measurement of track geometric parameters, can solve the problems of low data accuracy and low train speed, and achieve the effect of accurate overall measurement and detection

Active Publication Date: 2020-02-21
北京力铁轨道交通设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When monitoring, the speed of the train is low when the train is just started, and the accuracy of the measured data is not high at this time.

Method used

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  • A method for measuring track geometric parameters at low speed and a compound measurement method
  • A method for measuring track geometric parameters at low speed and a compound measurement method
  • A method for measuring track geometric parameters at low speed and a compound measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for measuring track geometric parameters at low speed, which can be applied when the train speed does not exceed 15Km / h, and requires the use of an odometer, a three-dimensional gyroscope 5, a central processing unit, a front profiler 4, a rear profiler 3 and a computer To collect and process data, the distance between the front profiler 4 and the rear profiler 3 above the same track 1 is C on the train where the above equipment is installed. When the train starts, the odometer, the three-dimensional gyroscope 5, the central processing unit, the front profiler 4, the rear profiler 3 and the computer are turned on.

[0029] After that, the mileage of the train is recorded in real time by the odometer, and reflected in the coordinates in the horizontal plane, the relative geometric parameter x of track 1 can be obtained i , and input to the computer after being organized by the central processing unit. The three-dimensional gyroscope 5 measures the angle change ...

Embodiment 2

[0032] combine figure 2 and image 3 , a device for measuring track geometric parameters at low speed, including an odometer that records the mileage of the train in real time, and measures the angle change α in the horizontal plane in real time i 5. A laser profiler for real-time measurement of the offset from the surface of track 1. The laser profiler includes a front profiler for real-time measurement of the offset from the surface of track 1. 4. Real-time measurement of the offset from the surface of track 1. The measured rear profiler 3 is a computer for sorting and calculating the information of the odometer, the three-dimensional gyroscope 5, the front profiler 4 and the rear profiler 3, and the odometer, the three-dimensional gyroscope 5 and the laser profiler are all related to the central The circuit board of the processing unit is connected, and the central processing unit can be connected with the computer through wireless communication, and the central processin...

Embodiment 3

[0038] Under the situation that train speed is not greater than 15Km / h, adopt the method for embodiment one to measure, and under the situation that train speed is greater than 15Km / h, use inertial reference method to measure, combine Figure 6 , the measurement curve of the inertial reference method is above the undulation curve of the actual track 1, so

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Abstract

The invention discloses a method for measuring track geometric parameters at a low speed and a composite measuring method. The method for measuring track geometric parameters is characterized in thata distance between a front profiler and a rear profiler above the same track is C, a milemeter records the mileage of a train in real time and obtains track relative geometric parameters xi at a low speed, a three-dimensional gyroscope measures an angular change alpha in a horizontal plane in real time, the front profiler measures an offset hi-1 at a position with a distance xi-1 to a track surface in real time, the rear profiler measures an offset hi at a position with a distance xi to the track surface in real time, the front profiler measures an offset hi' at a position with a distance xi to the track surface in real time, yi of track relative geometric parameters is obtained through a formula yi=y0+Sigma(i=0)<i-1> hi' + Sigma(i=0)<i-1> C* sin alphai - Sigma(i=1) hi, finally a measured any point (xi, yi) is obtained, smoothness parameters are obtained, (xi, yi) is obtained through an inertial reference method when the speed of the train is more than 15Km / h, and the detection of track irregularity at a low speed or high speed is accurate.

Description

technical field [0001] The invention relates to the field of track measurement, in particular to a method for measuring track geometric parameters at low speed and a compound measurement method. Background technique [0002] In the early days, the state of the track was manually detected, and the track inspection trolley appeared in the 1870s. Use manpower to push the trolley and motorized detection trolley for detection. Checks by these methods do not reflect the geometry of the track under train wheel loads. In the past ten years, due to the increase of driving speed and traffic volume, it is necessary to further improve the track irregularity and require more accurate measurement of track irregularity waveforms, thus promoting the development of new technology for track detection. [0003] In the prior art, track irregularities are measured using a three-point deflection method or an inertial reference method. In the case of high speed, the inertial reference method is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/30G01B21/20G01C1/00B61K9/08
CPCB61K9/08G01B21/20G01B21/30G01C1/00
Inventor 张发成白洪林常亮
Owner 北京力铁轨道交通设备有限公司