CPC G01P 3/487 (2013.01) [G01D 5/12 (2013.01)] | 8 Claims |
1. A rotation speed sensor comprising:
a sensor component having a first surface, a second surface on an opposite side of the first surface, a first magnetic sensing element arranged between the first surface and the second surface, and a second magnetic sensing element arranged between the first surface and the second surface so as to separate from the first magnetic sensing element;
a magnet arranged in a region closer to the second surface of the sensor component than the first surface of the sensor component; and
a magnetic plate arranged between the second surface of the sensor component and the magnet and made of a magnetic material different from the magnet,
wherein the magnetic plate includes an opening formed in a first direction that is a direction in which the sensor component, the magnetic plate and the magnet are arranged,
the opening is a through hole that penetrates the magnetic plate in the first direction,
one end of the opening faces the sensor component, and
the other end of the opening faces the magnet.
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