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Magnetic field measuring device

  • US 9,581,426 B2
  • Filed: 07/27/2012
  • Issued: 02/28/2017
  • Est. Priority Date: 07/29/2011
  • Status: Active Grant
First Claim
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1. A magnetic field measuring device that detects the strength of a magnetic field produced from a magnetic field-producing body, comprising:

  • first to fourth magnetoelectric transducers;

    magnetic convergence plates made up of a magnetic body; and

    a calculation unit that calculates the strength of a magnetic field applied in a horizontal direction and/or a vertical direction with respect to a magneto-sensing surface of the magnetoelectric transducers;

    wherein the magnetic convergence plates are placed in the vicinity of the first to fourth magnetoelectric transducers so as toconvert magnetic field vectors produced in a horizontal direction with respect to the magneto-sensing surface of the first magnetoelectric transducer and the magneto-sensing surface of the second magnetoelectric transducer into magnetic field vectors in a vertical direction with respect to the magneto-sensing surface of the first magnetoelectric transducer and the magneto-sensing surface of the second magnetoelectric transducer, and also in opposite directions at the respective magneto-sensing surfaces, and further,convert magnetic field vectors produced in a horizontal direction with respect to the magneto-sensing surface of the third magnetoelectric transducer and the magneto-sensing surface of the fourth magnetoelectric transducer into magnetic field vectors in a vertical direction with respect to the magneto-sensing surface of the third magnetoelectric transducer and the magneto-sensing surface of the fourth magnetoelectric transducer, and also in opposite directions at the respective magneto-sensing surfaces, andwherein the calculation unit comprises a first calculation block that adds or subtracts outputs from the first to fourth magnetoelectric transducers to output a calculation result.

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