1. Project details: The radar-sensing smart lighting is a smart energy-saving lighting with radar human body sensing and real-time data transmission; the smart lighting uses a 24GHz radar sensor, LoRa wireless communication module and embedded microprocessor. This smart lighting can distinguish between vehicles and pedestrians, automatically turn on and off lights, automatically upload data, and can also be remotely managed manually. The radar human body sensing of this smart lighting is not affected by temperature, brightness, and weather, and will not cause privacy concerns. Installation and It is very convenient to use; this smart lighting uses cluster technology to connect thousands of sensor lights to the same local area network, and uses the LoRaWAN gateway to send data to the cloud, enabling online cluster management of hundreds of thousands of smart lights. It is expected that the smart lighting will play a huge advantage in energy saving, traffic optimization, smart city and other aspects.
2. Project Difficulties and Challenges: Ordinary human body sensing lighting often fails to work when the outdoor light is strong or in haze and other weather conditions; in order to improve the accuracy of human body sensing, this smart lighting uses radar sensing to greatly improve the accuracy of human body sensing. temperature, so that the product is not affected by external interference such as temperature, brightness, weather, etc. In order to accurately identify the human body and eliminate interference, fuzzy algorithms are used to accurately analyze radar data in scenes such as human movement, car movement, animal movement, etc., and calculate and obtain a series of data such as object size, object shape, movement speed, and movement direction to achieve stability. Reliable human body sensing.
3. Project hardware and software:
The radar-sensing smart lighting mainly includes a microcontroller, digital tube display, LoRa wireless module, 24GHz radar sensor, solid-state relay switch, AC-DC power supply and other parts. The microcontroller controls the light to turn on and off and receive and respond to other wireless signals. Within the range of the wireless signal, you can use the remote control to control any radar sensor light in the nearest local area network, and you can view the status of any smart sensor light in the local area network. Each local area network uses LoRa wireless modules to interconnect various smart lighting lamps, and then uses relay gateways to send data to the cloud. Smart lights can be turned on and off automatically, and lights can be turned on and off automatically. Using cluster technology, lights can also be used to help pedestrians guide the way and provide centralized lighting, etc.
Due to the limited sensing range of ordinary sensor smart lights, the sensing accuracy is not high. Designs that light up for several minutes after sensing once are often used. Sometimes, they are also affected by vehicles. When the vehicle approaches, the lights are suddenly turned on, causing the driver's vision to be blocked, which not only consumes Electricity also poses safety risks. Using LoRa modules to connect other smart lights to achieve cluster management, and using highly reliable radar sensing methods, can solve this type of problem.
This is a software process that uses cluster technology to realize smart light following. By identifying the walking speed and direction of the human body, it notifies other smart lights on the traveling route in advance to prepare to light up, and notifies road sections that can no longer provide lighting to quickly extinguish, so that pedestrians around them can At least two lights are on, giving pedestrians a better experience and saving electricity.
The project has been installed and used on site, the picture above shows the wiring and installation of the circuit board.
4. Project material list:
From left to right are the remote control, solid state relay switch, and microcontroller motherboard
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