Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1988-03-25
1989-07-04
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
324208, 246249, G01P 3487
Patent
active
048454281
ABSTRACT:
A magnetic speed detecting arrangement for a railway vehicle including a number of permanent magnets fixed on the outer circumference of an axle of the railway vehicle at fixed intervals in which the distance between two adjacent permanent magnets is larger than the width of the permanent magnets. A detector holder is fixed to the sprung portion of the body of the railway vehicle. A number of magnetic sensing elements are mounted to the detector holder and face the outer circumference of the axle. The number of permanent magnets may vary between 7 and 17 and the number of magnetic sensing elements may vary between 4 and 9 so that the product of the permanent magnets and magnetic sensing elements causes the detector to produce at least 60 pulses per revolution of the axle.
REFERENCES:
patent: 3742243 (1973-06-01), Gamble
patent: 4024458 (1977-05-01), Templin
patent: 4629982 (1986-12-01), Kieslich
Eisenzopf Reinhard J.
Harvey Jack B.
Nippon Air Brake Co., Ltd.
Sotak J. B.
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