| 摘要 |
PURPOSE: To obtain a rotational angle sensor which can detect a rotational speed of a super high speed rotary body without touching the rotary body. CONSTITUTION: The sensor has at least a first and a second detecting means 10, 20 each having a detecting means constituting a stator 11, 21 composed of electromagnetic detectors 13-16, 23-26 constituting an induction detector, and rotors 12, 22 of the first and second detecting means 10, 20 having a ferromagnetic ring faced to the stator 11, 21 in the circumference thereof and set oppositely eccentrically to a common rotary shaft 40. Moreover, the sensor has coils of the electromagnetic detectors 13-16, 23-26 constituting different arms of bridge circuits 50, 60 driven by a single carrier signal supplied from an oscillator 30. |
