| 摘要 |
A demagnetization device comprises an electromagnet, a capacitor, a control unit composed of a frequency converter, a sensor of rate variation in an electromagnet, tripping pulse shaper, a single-shot multivibrator, a synchronizer of a tripping pulse and a amplifiers with a switching apparatus, a voltage transformer, an industry frequency selective filter, a threshold element, a differentiating circuit, an inverting amplifier, a computer, a mass measuring unit with measuring circuit and a converter. |
