| 摘要 |
A digital data processing and communications system for a remote utility meter data acquisition system is disclosed. The system employs an electronic interrogator which may be either mobile or fixed. The interrogator transmits an encoded interrogation message to a designated fixed reply station associated with a utility meter. Upon receipt of a properly authenticated interrogation, the reply station transmits the utility meter reading back to the interrogator. The system is so designed that when more than one reply station is within range of the interrogation message, only the one reply station that is addressed in the interrogation message will transmit a reply. Thus, an interrogating operation may be carried out in which many reply stations are interrogated in successive order, with each station transmitting its reply in turn. Transmission between the interrogation station and the various reply stations may be via radio link, acoustic link, electric power line, or a combination thereof.
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