The low-power radar module detects the trigger of the opening of the lid of the smart trash can. The smart trash can is a subdivision product under the concept of smart city, and its big advantage lies in intelligence. The front end can also realize automatic overflow alarm function by installing various sensors, detecting temperature, humidity, smell, smoke and other methods. In other words, this trash can can automatically sense whether the trash can is full of rubbish and remind sanitation personnel to clean the trash can in time.
The developed radar module realizes intelligent and contact-free waste sorting. It can provide two test solutions for the trash can (automatic lid opening test + object position height test in the trash can). Low-power radar module products have been installed and applied to trash cans in many cities. It can not only perform data distribution and docking with the garbage removal vehicle in real time after the amount of garbage reaches 80%, so as to realize the seamless docking of garbage collection and transportation.
1. Composition and function of intelligent trash can system
System composition
Unmanned intelligent clearing and transportation (real-time monitoring of garbage volume), photovoltaic power supply system (IoT Internet of Things monitoring system), disinfection system (5G data transmission).
Photovoltaic system: power supply for measurement, communication, sound and light, photoelectric and other systems.
Killing system: Effectively slow down the decay rate of perishable garbage, reduce the peculiar smell caused by the decay of garbage in the trash can, and kill all kinds of garbage decaying bacteria through the self-made killing system.
Internet of Things information collection system: The product is equipped with an Internet of Things system, and the distribution location information of the product can be viewed through the system. The trash can is full of information. Fault records. Real-time monitoring of the amount of garbage.
Intelligent cap opening system: This product is equipped with an automatic cap opening system. When residents throw in garbage, they will automatically sense the radar of the garbage bin, open the lid of the garbage can, effectively avoid hand contact with the garbage can, reduce the contact and spread of bacteria, and improve the comfort of residents in garbage delivery.
Standard trash can: The product can be perfectly matched with the standard 240L trash can, and can be upgraded and installed in the original trash can position. The combination structure is adopted, the installation is simple, and the original bucket position makes the garbage classification easy to promote and promote.
Propaganda system: The product can be equipped with LED advertising screens or billboards for garbage classification propaganda or other commercial propaganda.
Monitoring system: The product can be equipped with a remote video monitoring system with the urban information management system.
Unmanned intelligent cleaning and transportation: The product is equipped with an IoT system, which can be upgraded to 5g data transmission and connected in real time with unmanned garbage cleaning and transportation vehicles. When the trash can overflows, it is the best matching device for building a smart community.
2. Business logic smart trash can
1. Near the inspection bucket near the trash can, the trash can cover will automatically open.
2. After the information is placed, the lid of the trash can will be automatically closed, and the measurement of the remaining amount of garbage will also be opened.
3. Send junk remaining information to the remote data management system.
4. The system determines which trash cans can be collected based on the information of trash can overflow.
5. Plan the collection path, and the vehicle collection garbage bin has reached the overflow standard.
3. The application of radar in smart trash cans
1. Intelligent lid opening system for trash cans: The product is equipped with an automatic lid opening system. When residents throw in garbage, they will automatically open the lid of the garbage can, effectively avoid their hands touching the garbage can, reduce the contact and spread of bacteria, and improve the comfort of residents' garbage placement through automatic sensing of the low-power radar module on the garbage booth (detection Persons in front, inclined installation, detection of persons with height over 130cm).
2. Garbage inventory detection system in the trash can: radar automatically detects the amount of garbage, installed on the trash can cover in the trash can, facing the detection below. When the amount of garbage reaches 80%, it can be connected to the garbage truck for real-time distribution, and garbage collection and transportation can be seamlessly connected.
4. Advantages of low-power radar module solutions
1. Distance to identify black garbage: 3-8m.
2. Support battery power supply, low power consumption <0.05W.
3. The weight of installation and integration is less than one yuan coin.
4. Accurate real-time measurement of 4.100Hz high frequency, configurable parameters.
5. The detection angle is 2° to prevent false alarms caused by too wide contact with the cylinder wall.
6. Plug and play, consumer price.
7. Human eye safety is satisfied.
8. The module structure of the protective shell can be added.
Smart waste management helps reduce the total collection and transportation costs of waste management by nearly 50%. This will promote a more intelligent and rational way of garbage collection in the future, and provide the necessary conditions for front-end sensors to detect garbage residues and thus provide the necessary conditions for their rationality.
5. Actual case radar smart trash can
The smart garbage station is used for garbage classification, which is divided into kitchen garbage. There are four bins for hazardous waste, recyclable waste and four other types of waste. Above each bin is a lid that opens and closes automatically. The brackets behind the covers are the control units for each cover, with motors, circuit boards, etc. integrated inside. The entire smart garbage station is powered by solar cells on the top of the stand, and 8 low-power radar modules are used for one set of equipment.
Automatic lid opening detection: According to the distance change of the radar, it detects whether someone is approaching the trash can by detecting up and down. When people leave, the lid closes automatically after the radar module distance changes. Installed at a height of about 2m, tilted about 45 degrees, tilted down to detect, the working frequency is 10Hz, and the distance that needs to be responded is 1.1-1.8m. Children (about 1.3m tall) and adults standing in front of the trash can respond accurately.
Object height detection in the bucket: The height of the garbage in the trash can is detected by the radar in the lid. The bin height is about 90 cm. If the trash in the bin is almost overflowing (about 80% of the capacity), the system will issue a warning to the terminal to remind the specific bin to be emptied.
6. Applicable places:
1. Residential building: home.
2. Urban buildings: shopping malls. Buildings.
3. Public buildings: schools. Airports. Hospitals.
4. Other: Street.
