针对物联网技术的发展现状和智能燃气表对低功耗与强连接的需求，提出了一种基于NB-IoT技术的物联网智能燃气表的设计方案。该方案采用瑞萨R7F0C004芯片作为MCU采集燃气计量数据，以N700-58为通信模组实现网络连接，业务数据经由CoAP协议封装后发送到电信AEP平台，再由AEP平台推送到燃气表业务管理平台系统实现数据通信。测试结果表明，所设计的燃气表终端无论是在连网收发数据，还是在低能耗方面都达到了预期的设计目标，能够很好地满足应用需求。

Research and design of a gas meter based on NB-IoT

Abstract： Aiming at the development status of Internet of Things technology and the demand of intelligent gas meter for low power consumption and strong connection, this paper proposes a design scheme of intelligent gas meter based on NB-IoT technology. In this scheme, Renesas R7F0C004 chip is used as MCU to collect gas metering data, and N700-58 is used as communication module to realize network connection. The business data is encapsulated by CoAP protocol and sent to AEP platform, and then pushed by AEP platform to gas meter business management platform system to realize data communication. The test results show that the gas meter terminal designed in this paper achieves the expected design goal in terms of network connection, data receiving and sending, and low energy consumption, which can well meet the application requirements.

Key words : NB-IoT；Internet of Things；gas meter；data transmission；low power consumption