| 摘要 |
PROBLEM TO BE SOLVED: To realize and provide a highly accurate angle position detector in spite of having a small size capable of detecting an absolute angle position in a wide angle range. SOLUTION: In the angle position detector of the present invention, a magnetic plate and a conducive plate both having a respective slit radially arranged crosses at the slit part, while one of the plates is fixed and the other is mounted on a rotating axis. An exposure area of the magnetic and conductive plates viewed from one side in an axial direction is changed according to rotation, causing inductance of a coil in a vicinity to change. The angle position of the rotating axis is then detected from a change in inductance. The angle position detector utilizes mutually opposed functions that is a shield function of the magnetic and conductive circular plates with respect to AC magnetic flux, and a function with respect to the increase/decrease of magnetic resistance. COPYRIGHT: (C)2003,JPO
|
