| 摘要 |
PURPOSE: A non-contact type angle sensor is provided to minimize the numbers and size of magnets without a loss of a magnetic force supplied to a device of measuring a magnetic flux density. CONSTITUTION: A non-contact type angle sensor comprises a rotor(142) and hall element. The rotor comprises a first magnet, a second magnet, and a rotational plate shaped member. The first and second magnets are attached on the rotational plate shaped member. An S pole of the first magnet and N pole of the second magnet are directly attached on the rotational plate shaped member. The hall element is arranged on the upper part of the rotational plate shaped member and the first and second magnets are arranged between the hall element and the rotational plate shaped member. The hall element detects a measurement result as a rotary angle by measuring a magnetic flux density of a magnetic force line facing to an S pole of the second magnet from an N pole of the first magnet attached on the rotational plate shaped member covering other magnetic force lines except for the magnetic force line facing to the S pole of the second magnet from the N pole of the first magnet.
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