| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an irrigation controller for a tea plantation and a farm for controlling the opening/closing of a plurality of water feed valves capable of realizing the simplification and accuracy of the input operation and the smoothing, stabilization, high functionalization, and multi-application of the controller operation. <P>SOLUTION: (1) A liquid crystal display device adopting a dial type input switch capable of displaying large-scaled characters and graphics is used jointly. (2) A solar battery and other power sources are provided jointly to ensure the operation of the controller even when commercial power supply is interrupted or the battery is running out. (3) One or more water feed valves are provided jointly, or supply of driving signal to a water feed valve disposed outside is made possible, so that the controller is used as water feed equipment. (4) A program storage device exclusive for the opening/closing control program of the water feed valve is provided at the main body to non-periodically, arbitrarily and easily write and rewrite the control program from the outside. <P>COPYRIGHT: (C)2003,JPO</p> |
