The Internet of Things can be said to be one of the hottest technical fields in the world today. As an important part of the Internet of Things, the firefighting Internet of Things has taken the lead in landing, so for the current hottest wireless access technologies NB-IoT and LoRa, the firefighting industry is How do you view these two technologies? NB-IoT and LoRa are currently the most popular Internet of Things access technologies, none of them! In recent years, with the popularization of technology, the conditions for the landing of LoRa and NB-IoT have gradually matured, and more and more products have begun to adopt LoRa&NB-IoT. The fire protection industry is an industry that has been implemented earlier. In the following two types of technologies, we will focus on the differences in specific implementation projects in the fire protection industry. For the fire-fighting Internet of Things products, first of all its overall architecture is shown in the figure below: There are mainly several components: 1. Detector node: Mainly smoke sensor nodes, electrical fire detector nodes, and manual alarm nodes; The smoke node is used to detect the smoke generated by the fire; The electrical fire detector is a kind of early warning equipment, used to sense the leakage and aging of the line, and promptly alarm when the crisis is found; The manual alarm is an input device that people can quickly alarm after they find a fire. 2. Controller/gateway: Controller: used to receive the information uploaded by the node and make a judgment on the information (whether there is a fire); Gateway: Used to collect and forward node data to the cloud. 3. Cloud platform: used to collect massive data, analyze data, and make decisions. The access layer of the fire IoT node has the following characteristics: The number is huge: a small area may exceed 5000 points; Time delay sensitive: This is what the burning eyebrows are talking about. Nobody wants the fire alarm data to be stuck on the network and cannot be sent out when a fire alarm occurs; High power consumption requirements: the detector is a 24-hour non-stop fire detection, and it is battery-powered. Does anyone want this thing to always have to change the battery? Requires concurrency: once a fire occurs, many nodes will start alarming at the same time. So for the above user portraits, who is more suitable for the firefighting IoT scene, NB-IoT or LoRa? Let's take a look at the NB-IoT scenario first: Advantages of NB-IoT: The detector goes directly to the cloud without a gateway; The cellular technology background of NB technology ensures that the NB-IoT smoke detector has the ability to have a large number of nodes; With a power of 23dBm, large coverage can be achieved. Disadvantages of NB-IoT: Real-time performance is poor, NB-IoT itself is a wireless technology designed for delay-insensitive applications; The cost is relatively high, in addition to the cost of the hardware itself, there are also traffic costs; Relying on the infrastructure of telecom operators, the network cannot be deployed where there is no signal. Let's look at the LoRa scenario again: Advantages of LoRa: Good real-time performance, which can meet the needs of fire protection; The power consumption is lower than NB, which can achieve longer battery life; Deploy your own network without relying on the operator’s basic settings. Disadvantages of LoRa: The general LoRaWAN technology is not yet mature, and the risk of self-designed based on LoRa private networking technology is too great; Need to deploy a gateway, and the current gateway cost is not low; The underlying chip is monopolized by a company. For a more detailed comparison, see the table below: Friends, do you think LoRa or NB-IoT will win in the firefighting field? Welcome to leave a message at the bottom~ ZLG is a mainstream supplier of LoRa and NB-IoT modules in China, providing high-quality LoRa and NB-IoT modules to the market, and has many years of rich industry experience. You can contact us if you need it. Brief introduction of ZLG NB-IoT module ZM7100: Brief introduction of ZLG LoRa module LM400T: Langrui Energy (Shenzhen) Co.,Ltd , https://www.langruibattery.com
