| 摘要 |
PURPOSE:To reduce the influence by a disturbance such as a wind, etc. and to open and close a water gate by an appropriate frequency by determining a new water level step basing on the water level step used in the previous time. CONSTITUTION:A control reference water level, one-step water level difference, etc. are inputted from an operating console 3, and a present water level is inputted from input ports 6, 7. Also, a water level step used in the previous step is stored in a memory 2. A CPU1 derives a difference between the present water level and a control reference water level, from which a water level step is calculated. Subsequently, the CPU1 reads out the water level step of the previous time from the memory 2, and compares it with the calculated water level step. Basing on a result of this comparison, a new water level step is determined finally. Basing on this water level step, opening and closing of a water gate 10 are controlled. In this way, the influence by a disturbance such as a wind, etc. is reduced, and the water gate can be opened and closed by an appropriate frequency. |
