Research On The Application Of Meter Reading Based On LORA Full Wireless Intelligent Water Meter

The global trend of the Internet has become the internal demand of Internet application development,and networking applications in LAN or WAN Netcom often adopt wireless access mode,such as:various wireless LAN technology 2.4GHZ Wi Fi,Bluetooth,Zigbee,Wan 2G\3G\4G wireless technology,the advantages and disadvantages of them are actually very obvious.Before the Low Power Wide Area Network(LPWAN)generation,it seems that remote and low power consumption can only be selected,wireless connectivity technology is no longer satisfied with the close communication,is moving toward the distance,Broader direction of development.When the LPWAN technology has been widely used,the communications network planning and design staff can be both long-distance and low-power balance,the maximum degree of efficient communication transmission,while greatl y reducing the cost of relay.LORA is one of the LPWAN communication technologies.Compared with other LPWAN(such as Sigfox,NB-IOT,etc.),the commercialization of industrial chain is earlier,more mature and more suitable for enterprise application.It is the United States Semtech company adopted and promoted a spread spectrum technology based on ultra-long distance wireless transmission program,this program changed the past for the transmission distance and power consumption considerations,is based on a ne w type of 1GHz below the long Distance,low-power data transfer technology chip(SX1278),which accepts sensitivity up to-148 dbm,compared with other chips in the industry to improve the 20 db or more,and do not need to use expensive temperature compensation crystal case greatly reduced The power consumption.At the same time,because LORA technology uses a special spread spectrum technology,even if the end of different spread spectrum sequences using the same frequency at the same time to send,will not interfere with each other.In this paper,a large number of relevant domestic and foreign literature,combined with the actual market research and development and application of the situation,in the current wireless smart meter meter reading system architecture and programs based on the existing program to complement and improve,SR1278 wireless RF chip LORA technology.LORA technology is the core of the data transmission,the first LORA data packet to conduct a comprehensive definition and analysis,and then by the communication protocol to achieve the business logic out of the wake-up mechanism in the whole system data transfer role,followed by wireless intelligent meter reading system The design ideas of each module are described and verified in detail.Finally,the simulation test of the whole wireless intelligent meter reading system based on LORA and the test of the actual engineering environment are carried out,The results show that the SX1278 wireless chip based on LORA technology can provide customers with more stable,more powerful,more affordable and more convenient system solutions.The communication distance and acquisition success rate And data accuracy to a high level,so that LORA technology in the global low-power wide area network(Low Power Wide Area Network,LPWAN)application and promotion to carry out a wider range.And through the SX1278 wireless chip LORA technology research,greatly expanded and filled the current embedded wireless communications field of communication,but also for the development of wireless smart water meter has brought a leap forward opportunities.