| 摘要 |
PURPOSE:To reduce the time exclusively used for a communication line and also to attain continuous analog recording by providing a time control circuit and a data storage circuit to a terminal station and a central station, storing a measured data at each prescribed time in a terminal station, transmitting the stored data to the central station in the lump, and allowing the central station to store once the data and recording sequentially in analog at each prescribed time. CONSTITUTION:A measured data inputted to a terminal station 101 is sampled by an input converting circuit 3 at each prescribed time T1 from a time control circuit 2 and stored sequentially in a data storage circuit 4 whthin a prescribed time. On the other hand, the central station 20 transmits a transmission request of a data from a line control line 7 to the terminal station 101 at a time interval longer than the said sampling time T1. The terminal station 101 receives the transmission request by a call reception circuit 6 and transmits the stored data to the central station 20 by a transmission circuit 5. The central station 20 receives the data by the reception circuit 9, stores it by a data storage circuit 10, supplies an output sequentially to an analog output circuit 11 from the data storage circuit 10 at a time interval equal to the data input sampling time T1 of the terminal station 101, and records the data by an analog recorder 12. |
