Application case and introduction of IoT LoRa technology
The endpoint Netcom transmission technology of the Internet of Things has many technical solutions to choose from. In addition to lora, there are also NB-IoT, WiFi, Bluetooth, zigbee, Dustl, and sub-1GHz. Different communication technologies have different characteristics and each Suitable for your own application scenarios. But for long-distance, low-power consumption, and only a small amount of data needs to be transmitted, there is no wireless communication technology that can better meet the above requirements, which is the reason for the birth of LoRa technology.
For example, NB-IoT is suitable for real-time and large data transmission; LoRa is suitable for small data, regular, large-scale, and low-power requirements management.
To build IoT applications, it is necessary to determine the correct transmission technology in a complete and prudential manner, and not to ask God to ask the truth. Only by choosing vendors with diversified capabilities and practices can the IoT architecture achieve the expected benefits.
LoRa, what exactly is it?
The LoRa Alliance is an open non-profit organization with approximately 400 member companies in North America, Europe, Africa and Asia. Its founding members include IBM, MicroChip, Cisco, Semtech, Singtel, KPN, Swisscom, Fastnet and Belgacom.
LoRa is the abbreviation of LongRange. It is a low-power wide area network transmission technology applied to the Internet of Things. There are three kinds of silk and three kinds of LoRa, which can deal with different purposes. They are Class A (Baseline, basic timing). For transmission, power saving is emphasized), Class B (Beacon, in addition to basic transmission functions, increase trigger transmission capability), Class C (provide continuous transmission function).
LoRa has three characteristics that are in line with IoT applications.
The first major feature is the transmission distance of up to 15 kilometers.
The second major feature is low power consumption. A button battery can run the sensing node for 1 year.
The third major feature is low cost. License-free frequency bands, infrastructure and low cost of nodes/terminals make network construction, operation and maintenance very easy.
Whether it is smart cities, industrial and commercial management, agriculture, forestry, fishery and animal husbandry, they are all intelligent application fields of LoRa in the IoT environment.
How can the LoRa low-power wide area network technology environment improve our lives and work? Let me show you through the practical application of the following example.
In terms of smart city applications, if smart street lights are used next to the road, the usage status of the lamp bulbs can be transmitted through LoRa, and maintenance units can be notified in time for maintenance and replacement of bulbs.
In terms of smart home, if the smart meter/water meter is combined with LoRa transmission, it will not only save the cost of manual meter reading, but also provide warnings in abnormal situations, allowing the homeowner to know the water and electricity situation and avoid waste.
When deploying LoRa sensors on parking spaces in smart parking lots, there is no need to pull cables during the installation process, saving a lot of construction costs; one LoRa gateway can manage LoRa sensors in hundreds of parking spaces, real-time monitoring of parking spaces, and comprehensive control of parking spaces.
Reservoirs can use LoRa sensors to monitor water level changes; rivers can use LoRa sensors to monitor abnormal water level during heavy rain or drought, and provide flood control management.
In terms of smart buildings, the previous building equipment gradually cannot meet the requirements of human beings for the quality of living, and there is a trend towards smart buildings. For the renovation of the building, sensors such as temperature, humidity and safety are added, and the monitored information is uploaded regularly to facilitate the supervision of the building manager and keep abreast of the latest state of the building.
In terms of smart firefighting, every second counts for firefighting and disaster relief work and fire escape. The existing fire-fighting equipment can achieve limited effects when a fire occurs. Take the escape instruction sign as an example. The static instruction signal cannot cope with the changes in the fire scene and tells the evacuees the correct direction of escape in real time, which often delays the time of escape. The dynamic guidance system uses the characteristics of long distance, low frequency and low power consumption of LoRa wireless transmission technology. In the event of a fire, the dynamic guidance host sends signals to the dynamic guidance light board installed in the building. It is a low frequency band below 1GHz, so there is no need to worry about the signal being interfered by other wireless communications. After receiving the signal, the light board will immediately give instructions to guide the asylum to a safe escape route.
In terms of smart agriculture, low-power and low-cost sensors are very important to agriculture. Smart agriculture is the application of Internet of Things technology to traditional agriculture. Environmental data such as temperature, humidity, and salinity are regularly uploaded through sensors. This information can effectively help agriculture increase production and reduce water consumption.
In terms of logistics tracking, the battery life of the terminal is very important for tracking or positioning. Since the cost of the tracking system and battery life must be taken into account, it is quite suitable for tracking using LoRa technology. Logistics companies can deploy their nets in specific places according to their positioning needs. For example, during the transportation process, goods will be placed in warehouses for most of the time, or delivered to various places by trucks, so the industry only needs to be in the warehouse, The area covered by the logistics network, and even the LoRa gateway installed on the truck, can connect the tracker on the goods to the network. For the industry, it has strengthened management and efficiency, and can avoid the loss of goods; for consumers, it can also play the role of grasping the flow of goods and the time course.
Shared bicycle services and management have recently become a topic. If LoRa sensors are installed on shared bicycles, the LoRa gateway/base station in the city can be used to use the calculation principle of triangulation to control the location of the vehicle for easy management.
In addition to applications in the field of smart cities, LoRa technology can assist in the construction of IoT applications in agriculture, forestry, animal husbandry, and industrial and commercial applications, waiting for everyone to work together to realize smart life under the Internet of Things.
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