Catenary system measurement apparatus and method
First Claim
1. Apparatus for determining height and stagger of a railway catenary relative to a predetermined reference point located on a railway track at a predetermined location along the track, the track being disposed beneath the catenary, said apparatus comprising:
- a platform supported on the track at the predetermined location, said platform being positioned at a predetermined position relatively to the predetermined reference point;
first measurement means for measuring a distance to the catenary, said distance being proportional to the height;
traversing means for said first measurement means, said traversing means being mounted on said platform and supporting said first measurement means for movement relatively to said platform in a vertically oriented plane extending transversely and perpendicularly of the track; and
second measurement means for measuring displacements of said first measurement means in said plane, said displacements being proportional to the stagger.
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Accused Products
Abstract
Apparatus and method for measuring height and stagger of a railway catenary is disclosed. The apparatus comprises a platform supported on the track having a distance measuring means mounted on a traversing means for angular or lateral displacement of the distance measuring means in a vertical plane transverse and perpendicular to the track. The apparatus has a means for measuring the displacement of the measuring means. The method comprises positioning the platform on the track beneath the catenary, traversing the distance measuring means through a displacement into an alignment along a line of sight with the catenary, measuring the distance to the catenary, measuring the displacement of the distance measuring means, and calculating the height and stagger from the distance and displacement measurements.
38 Citations
35 Claims
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1. Apparatus for determining height and stagger of a railway catenary relative to a predetermined reference point located on a railway track at a predetermined location along the track, the track being disposed beneath the catenary, said apparatus comprising:
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a platform supported on the track at the predetermined location, said platform being positioned at a predetermined position relatively to the predetermined reference point; first measurement means for measuring a distance to the catenary, said distance being proportional to the height; traversing means for said first measurement means, said traversing means being mounted on said platform and supporting said first measurement means for movement relatively to said platform in a vertically oriented plane extending transversely and perpendicularly of the track; and second measurement means for measuring displacements of said first measurement means in said plane, said displacements being proportional to the stagger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for determining height and stagger of a railway catenary relative to a predetermined reference point located on a railway track disposed beneath the catenary, the reference point being at a predetermined location along the track, said method comprising the steps of:
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positioning a measurement apparatus on the track at a predetermined position relatively to the predetermined reference point at the predetermined location along the track; traversing said measurement apparatus to effect a displacement into an alignment along a line of sight with the catenary, said displacement being confined within a vertical plane oriented perpendicularly to the track; measuring a distance from said measurement device to the catenary along said line of sight; measuring said displacement of said measurement apparatus within said vertical plane; calculating the height and stagger of the catenary using said distance, said displacement, and the predetermined position. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A method of mapping the height and stagger of a railway catenary at a plurality of predetermined locations along a predetermined length of track, the height and stagger being determined relative to a plurality of respective predetermined reference points positioned on the track, one reference point being at each of the plurality of predetermined locations along the predetermined length of track, said method comprising the steps of:
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positioning a measurement apparatus on the track at a first predetermined location of the plurality of predetermined locations along the track, said measurement apparatus being positioned at a first predetermined position relatively to a first predetermined reference point of the plurality of the respective predetermined reference points; traversing said measurement apparatus to effect a first displacement into a first alignment along a first line of sight between said measurement apparatus and the catenary, said first displacement being confined within a first vertical plane oriented perpendicularly to the track at the first predetermined location of the plurality of predetermined locations along the track; measuring a first distance from said measurement device to the catenary along said first line of sight; measuring said first displacement of said measurement apparatus; calculating the height and stagger of the catenary at the first predetermined location using said first distance, said first displacement, and said first predetermined position; positioning said measurement apparatus on the track at a second predetermined location of the plurality of predetermined locations along the track, said measurement apparatus being positioned at a second predetermined position relatively to a second predetermined reference point of the plurality of the respective predetermined reference points; traversing said measurement apparatus to effect a second displacement into a second alignment along a second line of sight between said measurement apparatus and the catenary, said second displacement being confined within a second vertical plane oriented perpendicularly to the track at the second predetermined location of the plurality of predetermined locations along the track; measuring a second distance from said measurement device to the catenary along said second line of sight; measuring said second displacement of said measurement apparatus; calculating the height and stagger of the catenary at said second predetermined location using said second distance, said second displacement, and said second predetermined position; and repeating said positioning, displacing, measuring, and calculating steps for each predetermined location along the predetermined length of track. - View Dependent Claims (32, 33, 34, 35)
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Specification