| 摘要 |
PCT No. PCT/JP89/00874 Sec. 371 Date Apr. 17, 1990 Sec. 102(e) Date Apr. 17, 1990 PCT Filed Aug. 28, 1989 PCT Pub. No. WO90/01868 PCT Pub. Date Mar. 8, 1990.An automatic control system, having a main control system with wireless communication equipment, with a water sprinkling device disposed in an area to be sprinkled with water and adapted to sprinkle water over this area, and water piping installed between a water source and the water sprinkling device, and adapted to distribute water from the water source to the water sprinkling device. A water sprinkling control system is installed on the ground in a position close to the water sprinkling device and adapted to control the water sprinkling device. The water sprinkling control system includes a hydraulic valve disposed in the water piping close to the sprinkling device which has a water channel connecting an inflow passageway with a flow passageway connected to a pilot line. A two-way pilot solenoid valve is connected at one port thereof to the hydraulic valve through the pilot line, and at the other port to a drain piping. The water sprinkling control system also has a wireless signal receiving-transmitting system which receives a control signal from the main control system and transmits an answer signal thereto, a solenoid valve control device disposed in the vicinity of the two-way pilot solenoid valve, connected to the wireless signal receiving-transmitting device to control the two-way pilot solenoid valve, and a power supply which supplies electric power to the wireless signal receiving-transmitting device and the solenoid valve device. |
