Planning design of central well for household meters heating system;

Through a careful hydraulic calculation,this article confirmed the diameter of the polyethylene-aluminum-polyethylene composite pipes which are fixed after the natural gas meter set in a concentrated gas meter box.

Handshaking serial communication protocol of centralized meter reading system;

The automatic remote centralized meter reading system based on PSTN was introduced, and its constitution was given.

Main problems faced by low voltage power-line carrier technology when it applied in remote centralized meter reading system was introduced.

The automatic meter reading(AMR) system carrys out auto-transmitting of some data of measure point on time,inquiring about some information,showing and calculating and storing a meter s data on real time,and browsing web page of alarm information for legal departments.

To resolve the issue about the automatic meter reading,author designed a high-precision collect meter reading system of carrier wave on power,using the power carrier wave communication technology and the flush type technology.

Acccording to the current manner of central meter reading,in combination with the application experience of low-voltage wave carring central meter reading by Duyun Power Supply Bureau,the system structure,technical characteristics and running efficiency were overall analysed and summarized.