Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1989-10-12
1992-01-28
Strecker, Gerard R.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
307309, 324166, 324225, 324251, 328167, G01P 344, G01P 3488, G01R 3306, H01L 2722
Patent
active
050846744
ABSTRACT:
A circuit configuration for contactless detection of the rpm of a rotating gear wheel includes two identical firmly mounted and magnetically prestressed Hall sensors being mutually spaced apart by a center distance equal to one-half the tooth pitch of a gear wheel whose rpm is to be detected. Each of the Hall sensors includes at least one pair of identical Hall generators having signal paths and being driven with an impressed control current or impressed control voltage. Voltage/current converters are each coupled to the signal path of a respective one of the Hall generators and each have an output. An evaluation circuit links together the outputs of the voltage/current converters connected to one of the Hall sensors and the outputs of the voltage/current converters connected to the other of the Hall sensors in phase opposition.
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Publication by Ulrich von Borcke, entitled "Feldplatten-Differentialfuhler FP210", Siemens Component Information Manual 10 (1972 No. 5, pp. 129-132.
Publication by Hans A. Cuno, entitled "Einfache Berechnung von Feldplattendaten in Abhangigket von Magnetfeld und Temperatur", Siemend Component Report 14 (1976), pp. 89-93.
Jasberg Hartmut
Lachmann Ulrich
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Strecker Gerard R.
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