A high-speed rail running speed estimation method using speed scanning

A technique of running velocity and velocity scanning, applied in the field of exploration geophysics

Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
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The above methods need to be installed in a position where you can see the railroad tracks, and you need permission to enter the quarantine area and install equipment in the quarantine area

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  • A high-speed rail running speed estimation method using speed scanning
  • A high-speed rail running speed estimation method using speed scanning
  • A high-speed rail running speed estimation method using speed scanning

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[0056] The invention provides a method for estimating the running speed of a high-speed rail train using speed scanning, which can realize the running speed estimation of a high-speed rail train only by using the data of a seismometer outside the isolated area. The present invention firstly generates a series of force function amplitude spectra for the high-speed train train structure parameters and preset train running speeds, and then calculates the cross-correlation function between the force function amplitude spectra at various speeds and the signal amplitude spectrum received by a single detector, Finally, the speed corresponding to the maximum value of the cross-correlation function is selected as the estimated value of the train running speed.

[0057] see figure 1 , a kind of high-speed rail running speed estimation method utilizing speed scanning of the present invention, comprises the following steps:

[0058] S1, design the amplitude spectrum template function acc...

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Abstract

The invention discloses a high-speed rail running speed estimation method utilizing speed scanning. The method comprises the following steps that: an amplitude spectrum template function is designed according to a running speed and the typical parameters of high-speed rail trains in China; signals excited when a high-speed rail passes through are intercepted in the seismic data of a single-detector; Fourier transformation is performed on the intercepted signals, so that the amplitude spectrum of the intercepted signals can be obtained; the cumulative function of the signal energy spectrum is calculated, a frequency interval where most energy of the signal energy spectrum is located is determined; cross-correlation is carried out on the amplitude spectrum template function and the actual amplitude spectrum; a maximum cross correlation coefficient in all cross correlation coefficients, and a speed corresponding to the maximum cross correlation coefficient are searched; with the speed adopted as a base point, a speed change interval is narrowed, and an amplitude spectrum template function is re-established; and cross-correlation calculation is performed on the amplitude spectrum template function and the actual amplitude spectrum again; and a speed corresponding to a maximum cross correlation coefficient is searched, and the speed is recorded as the final estimated speed vfinal of the running of the train.

Description

technical field [0001] The invention belongs to the technical field of exploration geophysics, in particular to a method for estimating the running speed of a high-speed rail using speed scanning. Background technique [0002] In 1964, the commercial operation of the Shinkansen in Japan ushered in a new era of high-speed rail development in the world. Subsequently, France, Germany, Canada, Italy, Sweden, South Korea and other countries rushed to build high-speed rail and put it into commercial operation. On August 1, 2008, China opened its first commercial high-speed rail line, the Beijing-Tianjin Intercity Railway. Up to now, the operating mileage of China's high-speed rail has reached 31,000 kilometers, which is close to 70% of the total operating mileage of the world's high-speed rail. From 00:00 on July 10, 2019, the national railways implemented a new train diagram, and 3310 pairs of trains were operated every day. With such a large number of trains running at high s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/00G01V1/28G01V1/30
CPCG01P3/00G01V1/28G01V1/303
Inventor 王晓凯陈文超师振盛刘璞
Owner XI AN JIAOTONG UNIV
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