I. Project Overview
1.1 Introduction
With the rapid development of science and technology, domestic garbage has become an important factor affecting the environment, affecting human life and even affecting human living environment. Streets and alleys, tourist attractions, the interior of the campus is full of human waste, garbage bins have become a must-have item in people's daily lives, thousands of sanitation workers every day, garbage recycling vehicles busy in recycling garbage A line. Recycling garbage is a time-consuming and laborious task. It takes a lot of manpower and material resources every day. However, some garbage bins are not necessarily full, but they are also recycled, which causes a great waste of vehicle personnel. Especially for tourist attractions, the garbage bins above the mountain roads, accurately grasping the storage status of these garbage bins, will have obvious effects on saving manpower and material resources.
Under this demand, the intelligent trash monitoring and alarm system came into being. The intelligent trash can alarm system uses sensors to detect the storage status of the trash can, and transmits it to the garbage disposal center to timely grasp the storage status of the garbage can and accurately handle the garbage. First, the smart sensor in the trash can detects the storage status of the trash can. If the trash can is full, the storage status of the trash can be sent to the garbage collection center through the wireless intelligent module. The garbage disposal center will dispatch personnel according to the situation. Handling garbage, real-time and accurate, saving manpower and material resources.
1.2 Innovation points
(1) The use of renewable resources - solar energy as the system's power supply system is both energy efficient and reliable.
(2) It is convenient and quick to download the voice directly into the voice storage circuit;
(3) Apply Zigbee technology to the garbage bin remote alarm system, which can self-organize the network.
(4) Remote transmission of information using the GPRS network is reliable and fast.
Second, the demand analysis
2.1 Functional requirements
Intelligent trash can remote alarm system mainly consists of RFD (easy function device) and FFD (full function device)
The RFD is mainly composed of a power module, a voice module, a system main control module, a Zigbee module, and a sensor module.
(1) Power module
The system power module has two batteries, a solar receiver board. When there is sunlight, the solar receiver board charges the battery and supplies power to the entire circuit. When the sky or light is bad, the battery supplies power to the entire circuit.
(2) Voice module
The voice module is mainly composed of an audio download circuit, a voice storage circuit and an audio power amplifier circuit. The voice module mainly performs the following three functions:
1 can download voice into the storage module through USB;
2 When someone approaches a certain distance, the voice module automatically prompts;
3 When the person leaves a certain distance, the voice module starts the prompt again.
The device downloads the prompt audio information of the MP3 format to the voice storage circuit through the USB interface. Broadcast by the external module. Based on the application needs of this module, the EVK110 development board based on AT32UC3A, which focuses on audio signal processing, was selected as the development platform.
(3) System main control circuit
The system main control circuit and button display module mainly complete the functions of integrated management, power consumption control and information storage on the top of the system, and improve the overall automation and intelligence level of the system.
This project uses high-performance, low-power 32-bit AVR AT32UC3A chip as the system microcontroller to control the voice module, zigbee module, gprs module, sensor module circuit.
(4) zigbee module
The zigbee module mainly performs the following two functions:
1 Automatically search for other RFDs (simplified function devices) to form a star network.
2 Transfer the RFD information to the FFD (full-featured device).
Zigbee technology can quickly and accurately transfer information, saving wiring between devices.
(5) Sensor module
1 Infrared barrier sensor for detecting people throwing garbage, the sensor has strong anti-interference ability to ambient light, and the detection distance is completed by a pair of infrared transmitting tubes and receiving tubes, and the transmitting tube emits high-frequency infrared signals. When an obstacle (reflection surface) is detected in front, the infrared light is reflected back and received by the receiving tube. At this time, the indicator light is on, and after the circuit processing, a low level signal is output, thereby triggering the voice prompt system to remind people to classify the garbage, humanity. In the right trash can. The detected distance can be adjusted by adjusting the sensor's VR1 potentiometer. The main performance indicators of this sensor are as follows:
Input voltage: 4.0V -6.0V
Input current: less than 15mA
Output mode: digital; (when there is feedback from the infrared reflected signal, the output is low.)
Adjustable distance: 5cm~40cm, high sensitivity.
Adjustable transmission frequency: Each module can be adjusted at different transmission frequencies, and multiple modules can be used together at the same time without mutual interference. This sensor is stable and has a simple working mode, which is the first choice.
2 sensors in the trash can
Adopt OS806 through-beam infrared sensor. The OS806 sensor consists of an imported high-emission GaAs infrared emission tube and a high-sensitivity phototransistor. It uses the object to block the beam and is gated by a synchronous circuit to detect the presence or absence of an object. Moreover, the sensor is inexpensive and adaptable to the environment, and is very suitable for application in this system.
Features:
1, high reliability,
2, the response speed is fast, the light seam is 0.5mm, the groove width is 4mm, and the pitch is 9mm.
IIFFD is mainly composed of four parts: power module, zigbee module, control system module and GPRS module.
GPRS communication module
Long distance
Stable information transmission
The mobile platform is used to transmit the information of the garbage bins in the area to the garbage station.
The system architecture of this project is shown in Figure 1:
Figure 1 system architecture diagram
The architecture diagram of RFD is shown in Figure 2:
Figure 2 RFD architecture diagram
The framework of the FFD is shown in Figure 3:
Figure 3 FFD organization structure
2.2 Performance requirements
Performance indicators to be achieved by this project:
(1) In the case of sufficient light, the solar panel can fully charge two batteries and supply power to the entire circuit within 12 hours. A fully charged battery ensures that the trash can detection alarm is at least 72 hours of operation when there is no light;
(2) After being processed by the audio power amplifier circuit, the system can broadcast the voice effect that meets the actual requirements, and the noise is less;
(3) The zigbee module has low power consumption and is sensitive to activation and transmission only 15ms. It can self-organize the network, can accommodate more than 200 nodes, broadcast information to avoid interactive response, and can avoid information collision.
(4) The system voice storage circuit has a large capacity, and has information for storing at least 200 node address information and more than 200 garbage boxes.
Outdoor Mobile LED Display description: in order to meet the requirements of all-weather performance and performance rental, outdoor LED mobile rental screen is particularly important. Its appearance makes up for the requirements that indoor LED mobile rental screen cannot achieve. Also compared with the traditional outdoor scenery, the grade is not high enough, the display content is single, affected by the environment, the wind is easy to deform, the heat is easy to change color and so on. Outdoor LED rental screen completely makes up for the shortage of traditional scenery.
Outdoor Rental Led Display features:
1. The brightness is high. In outdoor mobile performance, the brightness is required to be more than 5000cd, otherwise the screen can not be seen clearly due to the influence of sunlight. The brightness of our outdoor performance screen is above 5000cd, which can be used all day.
2. It has strong UV resistance. It can be used outdoors for a long time due to the influence of sunlight. The lamp beads do not fade, but the color is still bright and the light is slow.
3. Outdoor LED mobile rental screen, with rain proof and dust-proof grade up to IP65, rain and wind are unimpeded, and rain proof cloth is used to prevent weather and rain.
4. The cabinet body adopts die-casting aluminum box structure, with good heat dissipation performance and high levelness.
5. For large-scale outdoor performance activities, the screen body can be shaped to form the same picture and split screen picture. For example, part of the screen shows the live content of the stage personnel, part of the screen shows the live broadcast of the audience, etc.
6. Brightness adjustment: according to the requirements of the use scene, the brightness can be adjusted, which greatly meets the requirements of different occasions. We are making perfect use of it both indoors and outdoors.
Outdoor Mobile Led Display Screen structure: quick lock structure, quick disassembly. The air plug and super-v network cable between the boxes can quickly link the signals and power supply between the boxes. The box has a waterproof rubber strip structure, which is waterproof up to IP65.
Precautions: as for indoor screen, pay attention to corners during handling and disassembly, handle with care, and cover the back cover for outdoor use to avoid water flow.
Outdoor Mobile LED Display
Outdoor Led Display,Outdoor Mobile Led Display,Outdoor Mobile Led Screen,Mobile Led Display Screen
Shenzhen Vision Display Technology Co,.LTD , https://www.ledvdi.com