Abstract
For meeting the practical needs of the rapid development in the electric power system, the automatic meter reading system is designed in this paper. The micro-controller STC12C5A60S2 is used as the core-component. The 485 circuit which is made up of the half duplex (HD) transceiver SN65LBC184 is used for data acquisition. The whole circuit is controlled by relay which connectied with optical coupler in the system. After processing the data of electric meter collected by the acquisition module, it will be stored in the FeRAM FM25256. Then the data could be sent to the power supply departments or customers periodically or according to the need. When the data is abnormal (deficiency of electric quantity, the abnormal current or voltage ), the control circuit should be powered down. The system possesses some advantages, such as high transmission rate, high accuracy and realizing line protection. A satisfied effect has been achieved in the practical application.
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