Method and apparatus for the contactless measuring of the tread

Details Method and apparatus for the contactless measuring of the tread Method and apparatus for the contactless measuring of the tread

1986-08-04

1989-01-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356376, G01V 904

Patent

active

047989645

ABSTRACT:
The quality of the tread of profile of railroad wheels is measured in a contactless manner by illuminating the circumferential wheel surface with a light or radiation source directing its radiation at least approximately in a radial direction onto the wheel surface to form a light intersection image or a light edge image of the wheel profile or tread. A sensor or sensors such as cameras, scan or sense these images by receiving light reflected by the wheel surface to produce analog signals representing the quality of tread or profile. These analog signals are digitized and supplied to a central processing unit for evaluation to provide information regarding the wheel quality. The illuminating and sensing can be performed while the wheel or wheel set is stationary or while it rolls through a measuring station, whereby it is not even necessary to remove a wheel from its vehicle for inspection.

REFERENCES:
patent: 4040738 (1977-08-01), Wagner
patent: 4125317 (1978-11-01), Gordon et al.
patent: 4531837 (1985-07-01), Panetti
patent: 4674869 (1987-06-01), Pryor et al.
patent: 4678920 (1987-07-01), Iadipaolo et al.
patent: 4679447 (1987-07-01), Sieradzki et al.
"Quality Control by an Automated Visual Inspection", an article published in special print from vol. 20, Messen und Pruefen (Measuring and Testing), 1984, Nr. 6.

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