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Magnetic field detection device and method for detecting a magnetic field

A detection device and magnetic field technology, applied in the measurement device, the size/direction of the magnetic field, and the use of permanent magnets for magnetic field measurement, etc. Effect

Active Publication Date: 2014-04-16
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The number of coil windings of the excitation coil determines the level of the magnetic field that can be generated / detected, however multiple windings of one coil bring about an improvement in the detection of higher magnetic fields but have a great disadvantage for the control circuit because Coil resistance increases

Method used

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  • Magnetic field detection device and method for detecting a magnetic field
  • Magnetic field detection device and method for detecting a magnetic field
  • Magnetic field detection device and method for detecting a magnetic field

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Embodiment Construction

[0024] In the figures, identical reference numbers indicate identical or functionally identical elements.

[0025] figure 1 A schematic block diagram of a magnetic field detection device according to a first embodiment of the present invention is shown.

[0026] exist figure 1 The reference symbol K in this figure designates a ferromagnetic coil core, which has a receiving coil S0 coupled to the coil core K, the coil resistance of which is denoted by R0. The excitation of the coil core K can be detected by the induction of a current I0 in the receiving coil S0 via the output circuit arrangement D, which supplies a corresponding signal L0 to the detection circuit 3 . The detection circuit 3 supplies the magnetic field signal B derived therefrom to an evaluation device, which determines from the magnetic field signal B, for example, the magnetic field strength and / or the magnetic field direction.

[0027] The excitation takes place via a plurality of electrically separated ex...

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Abstract

The present invention realizes a magnetic field detection device and a corresponding method for detecting a magnetic field. The magnetic field detection device includes a coil core (K), a receiving coil (S0) coupled to the coil core (K), a plurality of electrically separated field coils (S1-Sn) coupled to the coil core (K), an excitation unit (2,3,D,A1-An;2',3,D,A1'-An') for generating a magnetic field excitation via a particular excitation current (I1-In) of the plurality of field coils (S1-Sn) coupled to the coil core (K) and an evaluation unit (1) for evaluating a magnetic field signal (B) received via a receiving coil (S0) coupled to the coil core (K).

Description

technical field [0001] The invention relates to a magnetic field detection device and a corresponding magnetic field detection method. Background technique [0002] Hall sensors, fluxgate sensors or Flipcore sensors are currently used in consumer electronics to detect the direction and / or strength of a magnetic field. The sensor element mostly consists of a closed or non-closed ferromagnetic core, a single or multiple winding excitation coil and a single or multiple winding detection coil. A control circuit of such a sensor element usually generates a periodic signal from a corresponding source. The control circuit is independent of the position of the sensor element. The sensor elements are thus located in this case on the same semiconductor material or on one or more materials / substrates. The control circuit of the corresponding sensor is mostly limited to the current excitation circuit for the sensor element via two connections. Two additional connections are used for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02
CPCG01R33/04G01R33/0023G01R33/02G01R33/0005G01R33/096G01R33/0052G01R33/09G01R33/038G01R33/0206G01R33/028
Inventor T·锡南奥格鲁A·叶米利
Owner ROBERT BOSCH GMBH
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