Displacement detection device

A displacement detection device, comprising:

• a magnet which is displaced in one direction, is rod-shaped and has a form in which a longitudinal direction and the one direction form a predetermined angle;
• and
• a sensor which detects a magnetic flux density of a magnetic field formed by the magnet in at least a direction orthogonal to the one direction and a magnetization direction of the magnet and outputs a signal proportional to the magnetic field detected, wherein:
• the sensor comprises:
• a plurality of magnetic detection elements of which sensitive direction is set to a first direction orthogonal to the one direction;
• and a magnetic concentrator which converts a magnetic flux in a second direction orthogonal to the one direction and the first direction into a magnetic flux in the first direction.

A displacement detection device, comprising:

• a magnet which is displaced in one direction, is rod-shaped and has a form in which a longitudinal direction and the one direction form a predetermined angle;
• and
• a sensor which detects a magnetic flux density of a magnetic field formed by the magnet in at least a direction orthogonal to the one direction and a magnetization direction of the magnet and outputs a signal proportional to the magnetic field detected, wherein:
• the sensor comprises:
• a plurality of magnetic detection elements of which sensitive direction is set to a first direction orthogonal to the one direction;
• and a magnetic concentrator which converts a magnetic flux in a second direction orthogonal to the one direction and the first direction into a magnetic flux in the first direction;
• and
• outputs a signal proportional to a magnetic flux density in the first direction by adding outputs of the plurality of the magnetic detection elements and outputs a signal proportional to a magnetic flux density in the second direction by calculating a difference between the outputs of the plurality of the magnetic detection elements.