Study Of Long-Range And Centralized Automatic Metering Reading For Water Meter Based On GPRS

A kind of long-range and centralized automatic metering reading for water meter system is designed.The function of the GPRS network meter reading and the USB centralized meter reading are accomplished by the M23 GPRS module and the C8051F340 single chip micro-controller.The system is composed of water meter,data collector,concentrator and administer computer.The data of water consumption which will be converted into pulse signals are collected by the water meter,and these pulse signals are disposed by the data collector which can use RS-485 communication with concentrator,water user's machine can be controlled when the upper instructions are received by the way of controlling the electromotion valves.The Concentrator plays an important role in data transit and bus segregation,It has two main tasks,one of which is the communication with data collector and to check the water meter's data according to the requirements of administer computer,the other task is the communication with administer computer by the way of GPRS and to transmit the data information collected by data collector to administer computer.A USB interface is set up in the concentrator in order to avoid the failure of GPRS network,and the staff can copy the datas by computer or hand-written.The administer computer can manage the user's purchase of water and control the user's machine by sending specific instructions.The long-range and centralized automatic metering reading for water meter system is analysed particularly in the text,In this foundation,the overall design is done.The hardware and software the concentrator involves are introduced,such as the GPRS/GSM module,the LCD module,the key module,the real-time clock chip,the USB and RS-485 communication and so on.It also introduces the detection of low-voltage power supply circuit,the pulse acquisition circuit,the valve control circuit,the anti-open circuit and the FLASH memory which the data collector involves.At present,the system has been successfully debugged,all the features achieve the desired requirements.