Research And Development Of Digital Multi-rate Watt-hour Meter Automatic Reading System

With standard of living developing, it becomes possible that one house has one or even more Watt-hour Meters. And electricity rate is not unchangeable like before. The rate of peak, flat, valley can be set accord by time. So reading meter system becomes a huge and multifarious project. Traditional manual reading system no longer meets the new request, and new convenient reading meter system is expected.Author has analyzed many schemes such as electric cable reading system, telephone line reading system, infrared ray reading system, Hertzian waves reading system, 1C card reading system. We design a new scheme of combing infrared communication and serial communication based on client request and local condition. This paper introduces the Digital Multi-rate Watt-hour Meter Automatic Reading System, which is developed by author. This system solves the traditional manual reading meter problem of inefficient, high cost and low precision. Three modules are made up of the system, which includes Watt-hour Meter, handset and PC. The paper' s main thread is how each modules work together and how data transmits through--these modules. Meter's MPU is Microchip product, and assembler is compiled by PIC assemble language in MPLAB circumstance. The handset is LAND Co. ' s product, which program is compiled by HTbase language. Management Information System is developed with VB6.0, and used ActiveX Data Objects technology connecting Access database.This project strides over many subject such as electrocircuit, sensor, singlechip, embed system, computer communication, and software engineering, so this reading rneter system is a high automatic level system. The system successfully integratesAuto-Reading and Manual-Reading, and realizes automatic managing data, which not only convenience manager, hut alse convenience user. This system has been run steadily in JiangSu province for one year, and obtained high economy benefit.