| 摘要 |
PROBLEM TO BE SOLVED: To provide a system for controlling the injection of chlorine where complicated treatment such as the correction of control parameters and the learning of data is made needless, and the injection ratio of chlorine can be optimally controlled. SOLUTION: The system 50 for controlling injection where the injection ratio of chlorine is controlled in such a manner that the deviation in the concentration of residual chlorine reaches a prescribed range is provided with: a data collection unit 502 for time-sequentially collecting data on water quality; a memory unit 505 for memorizing the data on water quality the injection ratio of chlorine or the like; a multiple regression analysis unit 506 where the control parameters in the operational expression for the injection ratio are calculated by multiple regression analysis using the injection ratio of chlorine as objective variables and data on water quality as explanatory variables; and a chlorine injection ratio operation part 504 for calculating the injection ratio of chlorine using the control parameters, the data on water quality and the operational expression for the injection ratio. Regarding the multiple regression analysis part 506, in consideration of the lag time of flowing-down caused by the distance between the injection point of chlorine and the measurement point of the concentration in residual chlorine, the time axes of the respective data are made uniform, and also, using the data in which the deviation of the concentration in residual chlorine lies within a prescribed range, multiple regression analysis is performed. COPYRIGHT: (C)2006,JPO&NCIPI
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