Position sensor

摘要

A position sensor for a transmission mode selector lever includes a magnet and three magnetic flux detection elements that detect magnetic flux of the magnet. A determination circuit determines an operation position of the transmission mode selector lever based on output levels of detection signals generated by the magnetic flux detection elements. The magnet includes first and second magnetized regions. The first and second magnetized regions are formed so that when the magnet is moved relative to the magnetic flux detection elements along a straight line, output levels of the detection signals generated by the magnetic flux detection elements change in accordance with a proportional relationship having a first or second gradient relative to the distance of the movement. The three detection elements are spaced apart from each other on a straight line that is parallel to the first and second straight lines.

主权项

1. A position sensor for a transmission mode selector lever, the position sensor comprising:
a magnet; three or more magnetic flux detection elements that detect magnetic flux of the magnet, wherein the three or more magnetic flux detection elements are arranged opposing the magnet; and a determination circuit that determines an operation position of the transmission mode selector lever based on output levels of detection signals generated by the three or more magnetic flux detection elements, wherein
the magnet includes a first magnetized region and a second magnetized region,the first magnetized region is formed so that when the magnet is moved relative to the three or more magnetic flux detection elements along a first straight line that is an operation direction of the transmission mode selector lever, output levels of the detection signals generated by the three or more magnetic flux detection elements change in accordance with a proportional relationship having a first gradient relative to the distance of the movement,the second magnetized region is formed so that when the magnet is moved along a second straight line that is an operation direction of the transmission mode selector lever, parallel to the first straight line, and differs from the second straight line, output levels of the detection signals generated by the three or more magnetic flux detection elements change in accordance with a proportional relationship having a second gradient relative to the distance of the movement,one of the first and second gradients is a positive value,the other one of the first and second gradients is a negative value, andthe three or more detection elements are spaced apart from each other on a straight line that is parallel to the first straight line and the second straight line.