| 摘要 |
<p>An automatic electricity meter reading system consists of a large number of electricity meter readers, a small number of meter data receivers, a multiplexer and a computer. Each electricity meter reader reads a plurality of electricity meters belonging to different customers in the neighbourhood and at a specified time makes a telephone call and transmits meter data to a meter data receiver installed at an electricity control centre, and at the same time also receives control data including the time at which the next call is to be made from the meter data receiver. The meter data is then transmitted daily from the meter data receivers through a multiplexer to a computer installed at the same location for storage, billing and other processing. All meter readers are A.C. power operated. <IMAGE></p> |
