Patent ID: 9581426
Date: 2017-02-28
CPC Classifications: G01B,G01D,G01R

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 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.