| 摘要 |
PURPOSE:To obtain a high-precision detector of simple structure which is assembled easily by obtaining variation in facing area between a fixed electrode and a rotary electrode which is displaced according to the rotary displacement of a body to be detected in the form of electric variation, and thus detecting the rotary displacement. CONSTITUTION:When a rotating shaft 1 rotates by an angle theta according to the rotary displacement of the body to be detected, the rotary electrode 2 also rotates around the shaft 1 by the angle theta to shift in relative position from the fixed electrode 4 by the angle, and the facing area between the electrodes 2 and 4 is proportional to the angle theta. The magnetic circuit consiting of an energizing coil 9 varies in magnetic resistance with the facing area between the electrodes 2 and 4, and the magnetic resistance is in inverse proportion to the facing area. Therefore, a voltage induced at a detection coil 10 is proportional to the angle theta, so the voltage value is found to detect the rotary displacement of the body. |
