| 摘要 |
<p>PURPOSE:To detect the presence of water by causing an alternate current to flow between electrodes with alternate inversion of outputs of two microcomputers to suppress the generation of electrolysis. CONSTITUTION:The logic of first and second outputs of a microcomputer 5 continues to be inverted alternately in time sharing and hence, the voltage to be applied to electrodes 1a and 1b is an AC. When no water is in a can body A, there is an opening between the electrodes to turn off a transistor 11 and an input of the microcomputer turns to Hi, leading to a judgment that no water is in the can body A. Then, when water is left in the can body A, at the first phase, the transistor 11 fails to be turned on and no input processing works. When a processing of changing the output in time sharing shifts to a phase 2, current flows in the route of the electrode 1b, water, the electrode 1a, a resistance 13, the transistor 11 and the first output outputting a low level. Then, the transistor 11 is turned on and the input of the computer turns low. Based on a judgment that water is left, the microcomputer 5 performs a control.</p> |
