| 摘要 |
A remote data acquisition and communication system includes a plurality of collector devices including a radio transmitter, optionally a plurality of concentrator devices including a radio transmitter, a radio receiver and a memory, a plurality of controller devices including a radio transmitter, a radio receiver and a memory, optionally a plurality of data communications nodes coupled to corresponding concentrator devices via a first communications link, and a data management platform computer coupled to the data communications nodes or the next lower level of devices via a second communications link. The collector devices, concentrator devices and controller devices communicate with one another via RF communications, preferably a single communication channel at a single carrier frequency. The collector devices preferably transmit data to the concentrator devices at intervals of between 4 to 6 hours and in preferred transmission bursts of less than 200 milliseconds, to minimize collisions between transmissions from different collector devices, and the transmitted data is sorted and redundancies discarded for each desired period of data keeping, i.e., typically daily. |
