| 摘要 |
<p>PROBLEM TO BE SOLVED: To precisely and automatically carry out the starting and the stopping of the sprinkle of water on tea trees. SOLUTION: Plural sprinklers 12 for sprinkling water on a field is installed, and an opening and closing valve 18 for opening and closing the pass of a water-pipe 11 is installed in the water pipe 11 connected to each of the sprinkler 12. The atmospheric temperature of the field is detected by a temperature sensor 22. When the atmospheric temperature becomes a prescribed temperature or below, the on-signal is sent from the controlling part 21 to the opening and closing valve 18 so that the opening and closing valve may open the pass, and when the atmospheric temperature becomes a prescribed temperature or above, the pass is closed. The electric power of a battery 26 charged by a solar battery 15 is supplied to the controlling part 21.</p> |
