Track status monitoring device

Patent metadata

Field	Value
Publication number	US-9707983-B2
Application number	US-201314402433-A
Country	US
Kind code	B2
Filing date	Apr 25, 2013
Priority date	May 25, 2012
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Providing a track status monitoring device comprising an acceleration detection unit disposed on a railway car and detecting an acceleration at least in the axle direction among accelerations generated on a wheel of the railway car; a rail position detection unit disposed on the railway car and detecting a value indicating a position of the rail in relation to the wheel in the axle direction; an integration unit that calculates a value based on a 2 nd -order integrated value of the acceleration detected by the acceleration detection unit; and a subtraction unit that counterbalances an undulating component of the wheel by subtracting a value detected by the rail position detection unit from a value calculated by the integration unit, and calculates an amount of horizontal-direction displacement of the rail.

First claim

What is claimed is:

1. A track status monitoring device that detects an amount of horizontal-direction displacement of a rail for a railway car to run, the device comprising:
an acceleration detection unit that is disposed on the railway car and detects an acceleration at least in axle direction among accelerations generated on a wheel of the railway car;
a rail position detection unit that is disposed on the railway car, wherein a position of the rail in relation to the rail position detection unit and a position of the wheel in relation to the rail position detection unit are detected, and based on both detected positions, a value indicating a position of the rail in relation to the wheel in the axle direction is detected;
an integration unit that calculates a value based on a 2 nd -order integrated value of the acceleration detected by the acceleration detection unit; and
a subtraction unit that counterbalances an undulating component of the wheel by subtracting a value detected by the rail position detection unit from a value calculated by the integration unit and calculates an amount of horizontal-direction displacement of the rail.

2. The track status monitoring device according to claim 1 , wherein the rail position detection unit and the acceleration detection unit are provided on a rigid body that is integrally displaced with the wheel.

3. The track status monitoring device according to claim 2 , wherein the rigid body is an axle box that supports an axle of the wheel.

4. The track status monitoring device according to claim 1 , wherein the rail position detection unit is a non-contact displacement gauge that comprises a light emitting section and a light receiving section.

5. The track status monitoring device according to claim 4 , wherein the rail position detection unit comprises a two-dimensional laser displacement gauge.

6. The track status monitoring device according to claim 4 , wherein the rail position detection unit comprises a plurality of spot laser displacement gauges that are arranged in parallel.

Assignees

• Tokai Ryokaku Tetsudo Kk

Inventors

• Soda Yoshinobu
• Masuda Iwao

Classifications

• G01B11/14

  for measuring distance or clearance between spaced objects or spaced apertures (G01B11/26 takes precedence; rangefinders G01C3/00) · CPC title

• B61K9/08 Primary

  Measuring installations for surveying permanent way · CPC title

• G01B21/20

  for measuring contours or curvatures, e.g. determining profile · CPC title

• G01B11/24

  for measuring contours or curvatures · CPC title