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AssigneeAichi Steel Corporation
InventorsMichiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
Estimating the term…
A marker detection device which detects a magnetic marker laid in a road by using a sensor unit in which a plurality of combinations of a magnetic sensor and a magnetic-field generation coil are arranged includes a storage part which stores characteristic information of each magnetic-field generation coil, an estimation part which estimates a magnetic differential value acting on the magnetic sensor due to a current differential value acting on the magnetic-field generation coil by referring to the characteristic information of each magnetic-field generation coil, and a calibration part which calibrates each magnetic sensor so as to enhance uniformity in sensitivity, which is a ratio between an output differential value of the magnetic sensor in accordance with a change of a current by the current differential value acting on the magnetic-field generation coil and the estimated magnetic differential value.
A magnetic measurement system which measures magnetism by using a magnetic sensor, the magnetic sensor being provided with a magnetic-field generation part which generates a magnetic field in accordance with a current passed, the system comprising:
A method of calibrating a magnetic sensor which measures magnetism, the magnetic sensor provided with a magnetic-field generation part which generates a magnetic field in accordance with a current passed and provided with a storage part which stores characteristic information of the magnetic-field generation part indicating a magnetic output characteristic, which is a relation between the current passed to the magnetic-field generation part and the magnetism acting on the magnetic sensor,
Dependencies are inferred from the claim text.