Sensor for detecting the direction of a magnetic field in a...

Details Sensor for detecting the direction of a magnetic field in a... Sensor for detecting the direction of a magnetic field in a...

2007-06-26

2007-06-26

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Magnetometers

C324S260000

Reexamination Certificate

active

10569146

ABSTRACT:
The invention relates to a sensor for detecting the direction of a magnetic field in a plane whose direction can be defined by the indication of a polar angle ?. Said sensor comprises a number of n magnetic field sensors (3.0 to 3.7). A measurement axis (8.1 to 8.4) is assigned to each magnetic field sensor in such a manner that the absolute value of the output signal of the magnetic field sensor is largest when the magnetic field runs parallel to the measuring axis. All measuring axes intersect at a common point (5). The number k of measuring axes is equal to at least three. An operating mode is provided during which two magnetic field sensors are selected for calculating the angle ?. These two magnetic field sensors belong to different measuring axes, and the values of the output signals thereof are less than those of the output signals of the magnetic field sensors belonging to the other measuring axes.

REFERENCES:
patent: 4599564 (1986-07-01), Kelleher et al.
patent: 6545462 (2003-04-01), Schott et al.
patent: 1 182 461 (2002-02-01), None
patent: WO 01/18556 (2001-03-01), None
Popovic, R.S., “Not-plate-like Hall magnetic sensors and their applications” Sensors and Actuators A, Elsevier Sequoia S.A., Lausanne, CH, vol. 85, No. 1-3, Aug. 25, 2000, pp. 9-17, XP004214441, ISSN: 0924-4247.

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