| 摘要 |
PURPOSE:To prevent an auxiliary operating part becoming large-scale or operability from lowering even when a curve quantity detection means is introduced, by providing a magnetized pattern part to a rotary driver and/or the movable part of an angle wire along a movable direction and arranging a magnetic sensor composed of a ferromagnetic membrane magnetic resistor element and generating a pulse signal with the movement of the movable part. CONSTITUTION:A magnetized pattern part 7 for detecting curvature magnetized so that an S-pole and an N-pole are alternately generated along the circumferential direction at the pitch corresponding to necessary resolving power is provided to the circumference of a shaft 5 and a separate magnetizing pattern part 8 is locally provided to the shaft 5 at the position adjacent to the magnetized pattern part 7 for the purpose of giving a reference point when a curved part 2 is not curved. When it is supposed that the curved part 2 is in a non-curved state, the magnetized pattern part 8 for detecting the reference point is just opposed to the magnetic sensor 9c for detecting the reference point. Therefore, a magnetic field is detected by the magnetized pattern part 8 for detecting the reference point and the detection signal thereof is amplified by an amplifier 10 to be shaped into a rectangular wave by a comparator 11 and inputted to a counter 13 as a counter clearing signal. As a result, the counter 13 is cleared. |
