| 摘要 |
PURPOSE:To obtain a real-time data base management device to improve the productivity of real-time data processing work in a control system, and to lighten the program development burden of the operation superintendent and the data base application programmer of this control system. CONSTITUTION:The real-time data base management device 4 is provided with a data supplementing means 3 to estimate an omitted data value to occur at the time when corresponding retrieval processing is too late for its retrieval processing dead line time in addition to a data base retrieving means 1 to retrieve corresponding sensor data from a data base consisting of time series sensor data measured at a control system, and a time restriction managing means 2 to decide whether retrieval execution time required for the retrieval processing of the corresponding sensor data is in time for the retrieval processing dead line time designated by a data base application program 100 or not. Then, it is constituted so that an interpolated or extrapolated result 40 of this omitted data value by an estimation formula is answered to the data base application program 100. |
