| 摘要 |
A multipoint data collection system uses multiple parallel data buses (A, B, and C) connecting a central controller (10) to addressable sensor interfaces to permit any sensor (14, 15, or 16) to be connected to a central controller (10) over any one of the data buses. Faults on a data bus (A, B or C) may be bypassed, or multiple sensors (14, 15, and 16) monitored simultaneously in real time, through the use of the parallel data buses (A, B and C). Digital address signals and analog data are transmitted on the same data bus, distinguished from one another by restricting the voltage range of the analog data to voltages above the voltage corresponding to a digital zero and below the voltage corresponding to a digital one.
|
