NB-IoT and LoRa-based bus duct temperature collection gateway

Abstract

The invention discloses an NB-IOT and LoRa-based bus duct temperature collection gateway capable of realizing a wireless ad hoc network. The NB-IOT and LoRa-based bus duct temperature collection gateway comprises a LoRa transceiving antenna, a LoRa RF module, a master controller, an NB-IoT RF module, an NB-IoT transceiving antenna, a Contiki system, a debugging interface, a memory, an indicator light, and a power module. LoRa integrates digital spread spectrum, digital signal processing and forward error correction coding technologies, so that the gateway has stronger anti-interference and canresist large electromagnetic noise; due to use of the Contiki system, the gateway realizes the ad hoc network and expands the signal transmission scope, thereby playing a key role of keeping data transmission of the temperature collector reliable and ensuring that data is not lost.

Description

technical field [0001] The invention relates to a wireless communication gateway, in particular to a bus duct temperature acquisition gateway based on NB-IoT and LoRa, capable of realizing a wireless ad hoc network. Background technique [0002] The busway is a closed metal device composed of copper and aluminum busbar columns, which is used to distribute large power to various components of the decentralized system. It has increasingly replaced wires and cables in indoor low-voltage power transmission trunk line projects. [0003] With the rapid development of our country's economy, the power consumption of all walks of life is increasing day by day, and the traditional cables with a current of thousands of amps seem to be unable to do what they want. At this time, it is a matter of course for the busway to enter the historical stage. [0004] Due to the strong current-carrying capacity of the busway, it is very common to have a current of thousands of A in some occasions ...

AI Technical Summary

Problems solved by technology

Although this method avoids the wiring problem of construction, because ZigBee works on the 2.4G public channel, there are a large number of Bluetooth and WiFi devices, the electromagnetic interference is very serious, and it is easy to cause data loss; The performance is relatively good, and the diffraction ability is very weak. In the electric well and the relatively curved channel, the communication distance is very limited, resulting in a relatively limited number of nodes that can be linked under each gateway. This will inevitably increase the number of gateway arrangements. It is necessary to configure more SIM card data package fees, which is not conducive to the reduction of later maintenance costs

Moreover, due to the limited communication distance, the location selectivity of the gateway layout is also limited. In places such as electric wells or basements, it is inevitable to arrange gateways, but these places often have no GPRS signal, resulting in temperature data. It has been sent to the gateway, but the gateway cannot send it to the server, resulting in data loss

[0008] 4. The network cable is used to connect the gateway to the server. Although this method avoids electromagnetic interference in the space and the transmission is relatively stable, the transmission distance of the network cable is limited, and separate wiring is required, so the construction is more troublesome

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