Chord liner using angle measurement

Details Chord liner using angle measurement Chord liner using angle measurement

E - Fixed Constructions

01

B

33/127

E01B 33/02 (2006.01) E01B 35/00 (2006.01)

Patent

CA 1107060

ABSTRACT OF THE DISCLOSURE A track aligning device for monitoring the curvature of a track and adjusting the track successively to correct the curvature incorporates three rods mounted on a car or cars running on the track and pivotably connected together, the rods defining three chords each extending between a pair of spaced points located on the track center line. The angle between the first two rods is measured by a transducer which derives a voltage dependent on the magnitude and direction of the angle. This voltage is sampled at equal intervals, say two meters, as the aligning device passes along the track. The voltages are summed and averaged electrically and a voltage equivalent to the mean angle between the first two rods is obtained. The angle between the second two rods is measured by a second transducer and derives a voltage equivalent to the actual angle at a particular position of the track. This voltage is compared electrically with the mean voltage and an error voltage is derived and used to operate a servo-assisted aligning mechanism to adjust the track to the left or right as necessary. The deivce can also adjust the superelevation of the track to meet the necessary value as computed on the basis of curvature and speed.

317867

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