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Apparatus of measuring speed for railway vehicle and method thereof

A technology for trains and speed, applied to devices that measure the time required to move a certain distance, radio wave measurement systems, devices that use optical methods, etc., can solve problems such as difficulty in installing measurement sensors and speed sensors

Inactive Publication Date: 2008-12-10
KOREA RAILROAD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, in trains, it is difficult to apply conventional speed sensors due to train vibrations
Also, there is a problem that it is difficult to install measurement sensors since many related parts and machines are installed near the wheels

Method used

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  • Apparatus of measuring speed for railway vehicle and method thereof
  • Apparatus of measuring speed for railway vehicle and method thereof
  • Apparatus of measuring speed for railway vehicle and method thereof

Examples

Experimental program
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Embodiment Construction

[0020] The present invention will now be described in further detail by way of example embodiments with reference to the accompanying drawings.

[0021] Figure 1 to Figure 5 An apparatus and method for measuring the speed of a train are shown. like figure 1 As shown, the device for measuring train speed includes a light source 11 installed near the track 10, a measuring unit 12 that receives light emitted from the light source 11, and a speed converter that converts the signal received from the measuring unit 12 into a train speed value 13.

[0022] That is, the measuring unit 12 installed on the train receives the circular light beam or the linear light beam emitted from the light source 11 . Signals are transmitted from the measuring unit 12 to the speed converter 13 so that the actual speed of the train 14 is measured.

[0023] like figure 2 As shown, the light source 11 includes a laser unit 15 that emits a continuous beam, a convex lens 16 that controls the size of...

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PUM

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Abstract

The present invention relates to an apparatus and method for measuring the speed of a train, in which a light source is installed near a track and a measuring unit is installed on the train, thereby measuring the actual speed of the train running along the track by an indirect measurement method. A device for measuring the speed of a train consists of a light source, a measuring unit, and a speed converter, where the value of the train's speed is based on the time at which the light reaches its maximum intensity level at the same measuring unit or the time difference between the moments at which the light reaches its maximum intensity level at different measuring units And measured. The method of measuring the speed of the train includes: controlling the size of a continuous beam emitted from a laser unit installed near the track and forming a parallel beam, emitting a parallel beam to a measuring unit installed on the train, and utilizing the light to achieve maximum intensity at the same measuring unit The time of level, or the time difference between the moments when light reaches its maximum intensity level at different measurement units, measures train speed.

Description

technical field [0001] The invention relates to a device and method for measuring train speed. More particularly, the present invention relates to an apparatus and method for measuring the speed of a train, in which a light source is installed near a track and a measuring unit is installed on the train, thereby measuring the actual speed of the train running along the track by an indirect measurement method. Background technique [0002] Typically, rail vehicles such as trains travel along already installed tracks. Each wheel of such a train has a simultaneously rotating tachometer, wherein the speed of the train is measured by the number or frequency of revolutions of the tachometer. [0003] Therefore, a technique of measuring speed using a tachometer is cited in Korean Laid-Open Patent No. 2000-0045995 (publication date: 2000 / 07 / 25), in which a phase-locked loop (PLL) is described. The PLL includes: a phase detector for detecting the phase difference and converting the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/36B61C15/00B61L25/02G01P3/68
CPCB61C15/00B61L25/021G01P3/68G01P3/36
Inventor 睦载均张世基李银浩
Owner KOREA RAILROAD RES INST