| 摘要 |
Microwave drying system and method in which arcing is detected by a sudden drop in electric field strength within the drying chamber. An electric signal corresponding to field strength is provided and, in one disclosed embodiment, is compared with a reference signal which varies with changes in field strength which occur more slowly than changes due to arcing. The two signals are compared, and an output signal is provided if the two signal differ by more than a predetermined amount. This permits the sudden drop which accompanies arcing to be distinguished from more gradual changes in the electric field which occur, for example, as moisture is evaporated from the clothing or other articles being dried.
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