SENSOR DEVICE CONFIGURED TO DETECT MOTION OF ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a sensor device acting in non-contact in which the defect about an external field disturbance in a conventional system is extremely reduced and the resolution is remarkably increased.SOLUTION: The present invention is related to a sensor device (1). In the present invention, a magnet (3) is divided into at least three magnet segments. Each magnet segment has an intrinsic N pole (N) and S pole (S). The sensor (4) is disposed outside the magnet (3). When the magnet (3) moves, the sensor (4) is directly opposed to the magnetic pole of each magnet segment. The sensor (4) is located in the main flux direction of magnetic lines.SELECTED DRAWING: Figure 2