Today, I will introduce a national invention authorized patent-a smart remote gas meter based on LORAWAN technology. The patent was applied for by Chengdu Qianfeng Electronic Instrument Co., Ltd., and the authorization was announced on February 23, 2018.
Content descriptionThe invention relates to the technical field of gas meters and remote communication, in particular to an intelligent remote gas meter based on LORAWAN technology.
Background of the inventionMany traditional wireless systems use frequency shift keying (FSK) modulation as the physical layer because it is a very effective modulation for low power consumption. LoRa is based on linear frequency modulation, spread spectrum modulation, and is used to establish long-distance communication links. It maintains the same low power consumption characteristics as FSK modulation, but significantly increases the communication distance. Linear spread spectrum has been used in military and space communications for decades. Because of its robustness to long communication distances and interference, LoRa is the first low-cost implementation for commercial use. LoRaWAN defines the communication protocol and system architecture of the network on the basis of LoRa, and the LoRa physical layer can make long-distance communication links possible, making this technology one of the important branches of low-power wide area network (LPWAN) .
This technology can be widely used in the field of long-distance and low-rate IoT wireless communication in various occasions. Such as automatic meter reading, building automation equipment, wireless security systems, industrial monitoring and control, etc. It has the characteristics of small size, low power consumption, long transmission distance, and strong anti-interference ability. The antenna gain can be adjusted according to the actual application.
Summary of the inventionThe purpose of the present invention is to overcome the shortcomings of the prior art and provide a way to add a LORAWAN communication module to the original smart gas meter to realize the data interaction between the smart gas meter and the management system through the LORAWAN network based on linear spread spectrum technology. LORAWAN technology-based intelligent remote gas meter with management functions such as remote data detection, operation control and abnormal reporting.
![[New patent introduction] A smart remote gas meter based on LORAWAN technology](http://i.bosscdn.com/blog/pI/YB/AF/tAIF-AIWseAADxCN03Ctw994.png)
The figure is a schematic diagram of the intelligent remote gas meter structure of the present invention
The technical scheme adopted by the present invention is: an intelligent remote gas meter based on LORAWAN technology, including LORAWAN communication module, CPU module, power management module, flow detection module, IC card socket module, alarm prompt module and RTC module; CPU The modules are respectively connected with the LORAWAN communication module, power management module, flow detection module, IC card socket module, alarm prompt module and RTC module.
The LORAWAN communication module is a hardware integrated control chip, a network SUB 1G transceiver chip, and a software and hardware assembly with a network communication protocol embedded in the software, which is used for wireless signal transmission and reception; the CPU module is used for control programs and smart gas meter operation Parameter and key data storage, control the LORAWAN communication module to communicate according to the program; the flow monitoring module is used to detect the flow of gas and transmit the signal to the CPU module; the power management module is used to supply power to the modules of the gas meter; The IC card socket module reads and writes the data of the IC card installed on the IC card socket through the IC card read-write circuit, and performs data delivery with the CPU; the alarm prompt module is used to prompt the user to operate, display important data, and Alarm and prompt for abnormal operation and gas meter failure; RTC module is used to provide a real-time clock for step charging and timing control of gas meter. The alarm prompt module includes sound and light alarm devices.
The beneficial effects of the present invention are: the present invention provides a smart remote gas meter based on LORAWAN technology, which has a simple structure. The original smart gas meter can be connected by installing a LORAWAN communication module with necessary software; due to the LORAWAN network It is built by a telecom operator, so the communication part of the gas meter is easy to operate and maintain. The present invention adopts LORAWAN technology as the basis, realizes the data interaction between the intelligent gas meter and the management system through the LORAWAN network based on linear spread spectrum technology, and realizes the management functions such as remote data detection, operation control and abnormal reporting; with special software control , The gas meter can independently realize intelligent functions such as billing, abnormal detection, alarm prompt, and automatic operation.
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