| 摘要 |
PURPOSE:To realize a contactless detection for either shape of a magnetic or nonmagnetic matter, by setting (n) units of vortex displacement detectors at divided areas in the width direction of a plate and making use of the output signals of these detectors. CONSTITUTION:The (n) units of vortex displacement detectors 3 are set in a body in the width direction of a rolling stock. The enerigizing coil of the detector 3 is energized by the exciting frequency (10kHz-1MHz) of a sine wave oscillator 6. A compression air header 4 is set above the stock 2 to give a downward displacement to the stock 2. The gap between the stock 2 and each detector 3 is detected byaa detecting coil. The detecting signal is applied to an arithmetic device 100, and the shape detecting signals DELTAsigma1-DELTAsigman are obtained in response to the shape of the stock 2. |
