| 摘要 |
PURPOSE:To detect the position of a body without contact, by attaching a magnet to the body whose position is to be detected, and detecting the position of the magnet by a deviation magnetization differential transformer. CONSTITUTION:The magnet 1 is attached to the body whose position is to be detected. The magnet 1 imparts a static magnetic field for the deviation magnetization to the deviation magnetization differential transformer 9. When the magnet 1 approaches an iron core 3 of the deviation magnetization differential transformer 9, the differential voltage between the electromotive forces of the legs, which has the frequency twice that of exciting power source 2, is generated at a detecting winding 5. The voltage generated at the terminal of the detecting winding 5 at this time is proportional to the strength of the magnetic field. A feedback amplifier 7 flows a DC exciting current proportional to the terminal voltage to a feedback winding 6. An indicator 8 indicates the feedback winding current. The position of the magnet 1 can be found from said current value. |
