Gauge restraint measuring system

• US 7,337,682 B2
• Filed: 01/26/2006
• Issued: 03/04/2008
• Est. Priority Date: 12/31/2002
• Status: Active Grant

• Current Assignee: Holland LP
• Original Assignee: Holland LP
• Inventors: Conneally, Martin, Ruggles, Harold Thomas, Otto, Daniel P.
• Primary Examiner(s): NOORI, MAX H
• Application Number:
  US11/275,742
• Publication Number:
  US 20060162470A1
• Time in Patent Office: 768 Days
• Field of Search: 738/626.31
• US Class Current: 73/862.631
• CPC Class Codes: B61K 9/08 Measuring installations for surveying permanent way applications of measuring apparatus or devices for track building purposes E01B35/00; measuring techniques G01
• CPC Class Codes: B61L 23/047 Track or rail movements
• CPC Class Codes: B61L 25/025 Absolute localisation, e.g. providing geodetic coordinates
• CPC Class Codes: B61L 25/026 Relative localisation, e.g. using odometer
• CPC Class Codes: G01M 5/0058 of elongated objects, e.g. pipes, masts, towers or railways
• CPC Class Codes: G01M 5/0091 by using electromagnetic excitation or detection
• CPC Class Codes: G01N 2203/0244 Tests performed "in situ" or after "in situ" use

Abstract

A direct measuring loaded gage axle assembly that measures track strength by directly measuring constant load on split axles as vertical loads are imposed by a hydraulic ram, and horizontal loads being supplied by horizontal rams through split axles and steel wheels to the railroad tracks enabling improved calibration to measure changes in track gauge indicating track strength condition and further including electronic data recording and comparison.

Claims

1. A railway track strength measurement system comprising:

an axle assembly having a first wheel and a second wheel, the wheels positioned to ride on railway track;

a first axle half connected to the first wheel and a second axle half connected to the second wheel;

the first and second axle halves being interconnected by an expansion device, the expansion device adapted to increase and decrease the distance between the first and second wheels and places a lateral load on the axle halves and track; and

the axle halves each including force sensors adapted to directly measure changes in lateral forces in the axle halves.

2. The railway track strength measurement system of claim 1, said expansion device includes a hydraulic ram connected to the first axle half at a first end and to the second axle half at a second end.

3. The railway track strength measurement system of claim 1 wherein the first and second axle halves are fixed and do not rotate with respect to the first and second wheels.

4. The railway track strength measurement system of claim 1, wherein said first axle half includes a load measurement region.

5. The railway track strength measurement system of claim 4, wherein the load measurement region is formed to define two opposed vertical recesses, with a solid portion positioned between the two recesses.

6. The railway track strength measurement system of claim 1, wherein the first and second axle halves are connected to a pair of hydraulic cylinders, the hydraulic cylinders positioned to place a vertical load on the axle halves.

7. The railway track strength measurement system of claim 6, wherein one of the load cells is positioned within the aperture to measure vertical forces with the axle halves.

8. A railway track strength measurement system comprising:

an axle assembly having a first wheel and a second wheel, the wheels positioned to ride on railway track;

a first axle half connected to the first wheel and a second axle half connected to the second wheel;

the first and second axle halves being interconnected by an expansion device, the expansion device adapted to increase and decrease the distance between the first and second wheels and places a lateral load on the axle halves and track; and

the axle halves each including force sensors adapted to directly measure changes in lateral forces in the axle halves;

wherein said first axle half includes a load measurement region;

wherein the load measurement region is formed to define two opposed vertical recesses, with a solid portion positioned between the two recesses;

wherein the solid portion includes two apertures adapted to receive load cells;

wherein one of the load cells are positioned within the apertures to measure lateral forces with the axle halves.

9. A method for measuring track strength comprising the steps of:

positioning a track strength measuring device on a pair of railway rails, the rail strength measuring device having a pair of adjustable axle halves positioned between a pair of wheels;

placing the pair of axles under a substantially constant lateral and vertical load;

measuring force in a given region in each of the axle halves;

recording force from the given region in each of the axle halves;

measuring changes in track gauge from an unloaded to a loaded state; and

determining, based on changes in track gauge from an unloaded to a loaded state in combination with known loading forces, whether portions of the track are in need of repair;

further including the step of comparing the measured track gauge under load to known standard values, further including the step of identification the location of the section of track that does not meet the known standard values.