Magnetic field measuring device
First Claim
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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Accused Products
Abstract
The present invention provides a magnetic field measuring device comprising first to fourth magnetoelectric transducers, magnetic convergence plates, 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 to convert magnetic field vectors, and the calculation unit includes a first calculation block that adds or subtracts output from the first to fourth magnetoelectric transducers, and outputs a calculation result.
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Citations
15 Claims
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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:
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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 to convert 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, and wherein 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. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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2. A magnetic field measuring device that detects the strength of a magnetic field produced from a magnetic field-producing body, comprising:
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first to fourth magnetoelectric transducers; 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 calculation unit comprises; a first calculation block that adds or subtracts outputs from the first to fourth magnetoelectric transducers to output a calculation result, and a second calculation block that adds or subtracts output from the first to fourth magnetoelectric transducers to calculate a signal whose phase differs by 90 degrees from an output signal of the first calculation block to output a calculation result.
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Specification