The Research And Development Of AMR Reading Meter Module Based On LON Bus

Field-bus is a new type of data bus, which can communicate between many intelligent measuring and controlling devices in a serial double multi-node digital way, also known as basic controlling network for opening, digital and multi-node communicating. Field-bus promotes the precision and anti-jamming ability of measuring and communicating, strengthens dependability and adaptability of system. Field-bus is a new generation of automatic controlling system and is different to traditional model of controlling system from system structure and communication mechanism, what's more, it can solve the problems traditional controlling system left easily because of including the advanced technology of network and communication. Field-bus is well known as a next generation of controlling technology taking the place of DCS, because it accords with latest industrial controlling system's developing trends:distributing, networking and intelligent. So it is quite important to research the filed-bus technology in automatic field and design the products.Based on LON field-bus's technology characteristic, criterion of protocol and intelligent communication, this paper gives a Reading Meter Module designed project based on automatic meter reading(AMR) system, which depend on LonWorks technology, and designed project of LON bus networking administrating and software of related watching and administrating. This paper's designing object is automatic reading meter system's reading meter collection device, and raise whole designed project of reading meter system, on the other hand, achieve hardware circuit design of collecting device, software design of communication and system design of watching and administrating.Firstly,the paper's mainly introduce the characteristics of filed-bus, especially LON bus's technical characteristics, and automatic reading meter system, the background of task raising, author's main work, also give a simple introduction about difference about field-bus control system and classic control system, the developing situation, advanced technology characteristics. The author raises his expectation of field-bus development in these chapters, especially introduces LON bus's characteristics and main working related achievement. At the same time,the paper introduces the structure and main technical characteristics of AMP system.The author givess every functional circuit's designing method of intelligent nodes used reading meter collection model as object in detail, the author gives a detailed hardware designing project of collection device, based on which the author expounds designing project of intelligent nodes' applying software Neuron C and singlechip program. At the same time the author gives multi-computer communication's method of multi-thread technology, detailed protocol criterion and an example, meanwhile propose the further step's reaching and designing of reading meter system according to his experiences.Using many tools of LON, the author expounds several designing methods of watching and controlling system based on LON bus network., and gives designing project of LON watching and controlling system and processes of implementation based on ActiveX technology after reaching LNS technology. At the same time,thepaper gives the design of AMR system based on LON bus technology.It gives the designing of system, detailed designing project of intelligent AMR system and corresponding conclusion.At the last part of the paper, it contains all technical achievements and engineering experiences of the project.