Remote intelligent meter reading system and demodulation circuit used in concentrator of same

Abstract

The invention relates to a remote intelligent meter reading system and a demodulation circuit used in a concentrator of the same. The demodulation circuit comprises a voltage reference circuit, a sampling and low-pass filter circuit, a high-pass filter circuit and an amplification circuit, wherein the voltage reference circuit comprises a voltage dividing circuit which is used to perform voltage division to power voltage and send the divided voltage to the amplification circuit and the high-pass filter circuit to serve as reference voltage, the sampling and low-pass filter circuit performs sampling and low-pass filtering to the input signals, the filtered signals are sent to the high-pass filter circuit which performs high-pass filtering to the signals from the sampling and low-pass filter circuit, and the amplification circuit amplifies and outputs circuits filtered by the high-pass filter circuit. The remote intelligent meter reading system has the advantages that the load capacity is high and cable transmission distance is far, few concentrators are needed to finish meter reading tasks, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of bus remote intelligent control, in particular to a remote intelligent meter reading system and a demodulation circuit for its concentrator. Background technique [0002] The intelligent meter reading system is the AMR (automatic meter reading) system, which combines computer technology, modern communication technology, and embedded technology to realize remote reading of data from flow meters (such as electricity meters, water meters, gas meters, etc.) and management techniques. [0003] In recent years, with the continuous development of wireless communication technology, a technology for wireless networking requirements of low-cost devices has emerged, which is called ZigBee, which is a short-distance, low-complexity, low-power consumption, low data rate, low The low-cost two-way wireless communication technology is mainly suitable for automatic control, remote control fields and household equipment networking. ...

AI Technical Summary

Problems solved by technology

[0005] As far as the currently applied AMR systems are concerned, there are various technologies and different implementation methods, each with its own advantages and disadvantages, and no unified and mature standard has been formed.

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