Method and apparatus to contactlessly measure the brake temperat

Details Method and apparatus to contactlessly measure the brake temperat Method and apparatus to contactlessly measure the brake temperat

1987-10-16

1989-04-11

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

246246, 374121, G01J 510

Patent

active

048200573

ABSTRACT:
A method is described to contactlessly measure the brake temperatures of passing railroad cars, whereby the temperatures of all current practical brake types, for instance shoe and disk brakes at the wheels, but also of separate brake disks, can be measured. The method is characterized by using a known measurement apparatus with optics followed by an infrared sensor, whereby the measurement axis of this apparatus scans the passing wheel at a height 1 to 5 cm above the rail surface, the measurement axis "looking" from the rear-bottom, namely at an anagle alpha to the horizontal of 10.degree. to 22.degree. and at an angle omega of 7.degree. to 18.degree. to a horizontal line which is perpendicular to the rails, on the wheel. The measurement apparatus is controlled by track switch means activating the apparatus as long as the wheel rolls through the measurement axis. An electronic circuit is provided to extend the active time of the measurement apparatus by a factor N wherein the measurement axis measures the separate brake disk in railroad cars so equipped.

REFERENCES:
patent: 3151827 (1964-10-01), Gallagher et al.
patent: 3303340 (1967-02-01), Hewett et al.
patent: 3461284 (1969-08-01), Joy
patent: 3998549 (1976-12-01), Pusch et al.
patent: 4090064 (1978-05-01), Turner

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