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 in which magnetic detection element groups, which detect a magnetic flux density of a magnetic field formed by the magnet in directions orthogonal to the one direction, are arranged in pairs with a predetermined interval, and which outputs a difference between outputs of the magnetic detection element groups, wherein:
• the sensor comprises:
• magnetic detection elements, which are included in the magnetic detection element groups and have a sensitive direction in a first direction orthogonal to the one direction;
• and magnetic concentrators which convert 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 in which magnetic detection element groups, which detect a magnetic flux density of a magnetic field formed by the magnet in directions orthogonal to the one direction, are arranged in pairs with a predetermined interval, and which outputs a difference between outputs of the magnetic detection element groups, wherein:
• the sensor comprises:
• magnetic detection elements, which are included in the magnetic detection element groups and have a sensitive direction in a first direction orthogonal to the one direction;
• and magnetic concentrators which convert 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 detects a magnetic flux density in the first direction by adding outputs of the magnetic detection elements included in the magnetic detection element groups and detects a magnetic flux density in the second direction by calculating a difference between the outputs of the magnetic detection elements included in the magnetic detection element groups.