Design of Intelligent Garbage Bin

Transcription

1 Journal of Computing and Electronic Information Management ISSN: Design of Intelligent Garbage Bin Mingyu Zhang Suzhou Vocational Institute of Industrial Technology, Department of Electronic and Communication Engineering, Suzhou, China Abstract: This design takes MCU technology and related knowledge of MCU as background, and constructs an automatic control system that can fulfill the functions of whether the trash can is fully detected, spontaneous combustion detection, alarm prompt, and the use of Bluetooth to send trash cans. The reset circuit and clock circuit are built on the hardware circuit system, and the smallest system circuit is composed of STC89C51 microcontroller chip. The circuit of LCD1602 LCD screen, alarm circuit and HC-05 Bluetooth circuit is completed through this circuit. In the software structure, the programming code of the intelligent trash can control system is configured by C language, and the variable collection is carried out during the operation of the system according to the program code writer. The biggest characteristic of the system intelligent garbage control is based on single-chip circuit with clever collocation sensor circuit, the sensor to complete the detection of non electricity outside the system and conversion to digital signals for transmission of intelligent ashbin system, greatly enhance the working performance of the system. In the form of verification of system design results, the comparison between the abundant test data and the signal detected by the standard instrument shows the same result, indicating that all the index functions of the intelligent trash can control system have reached the standard. Keywords: Intelligent garbage bucket, STC89C51 single chip microcomputer, minimum system, Bluetooth communication, self ignition detection. 1. Introduction Many researchers like to make the whole framework into single-core or ARM multi-core mode, and improve the data processing speed and accuracy of the intelligent garbage bin control system through parallel work of multiple control cores, just like the eight-core processor in the mobile phone, the intelligent garbage bin control with the main control processor as the main control The reason why the system can achieve 16

2 today's research results is inseparable from the single chip technology [1-6]. At present, science and technology can easily embed the DSP core and ARM core into the main control chip for flexible access and use, decimal point operations and multiplication operations in the main control devices have been perfectly interpreted. In this paper, STC89C51 MCU will be used as the core part of the intelligent garbage bin control system. A high-performance electronic system will be realized by C language program code and hardware system [7-9]. The implementation of this system reflects the fact that microprocessor chips are now in people's minds. The status of production and life, now the control chip as the core of the intelligent garbage bin control system to a large extent to meet the increasing expectations of users, technicians through the continuous improvement of its effectiveness to enhance its effectiveness. The effect of microprocessor used in the earlier intelligent garbage bin control system is mainly 8-bit computer or even lower 4-bit computer. The performance of the CPU core in these controller chips is especially low compared with that of today's 32-bit computer. Take a simple multiplication operation for example, because there is no synthesis in the initial single-chip computer. The hardware multiplier module can only realize multiplication operation through the additive operation module in the CPU, which needs to execute multiple instructions and consume multiple clock cycles to realize one operation. Therefore, the early intelligent garbage bin control system is particularly weak in signal processing ability in case of large data operation. There are often errors such as jam and crash. This is the characteristic of the initial control system. The rapid development of MCU technology not only brings about the increase of data processing performance, but also realizes the compatibility and mutual invocation of various key technologies, which is also the main development direction of intelligent garbage bin system in the future. Intelligent garbage bin control system is the main research object of this graduation project. This paper will configure an excellent intelligent garbage bin control system based on the knowledge of microcontroller, analog electronics, digital circuit and the application of Proel software [1-10]. At present, the mastery level of the research technology of intelligent garbage bin system is quite different in the world. Some developed countries in Europe and the United States started to study the intelligent garbage bin control system earlier, so after many years of continuous improvement and improvement, many enterprises have learnt the top technology. At present, many enterprises and universities in China are sinking down and studying the superior intelligent garbage bin system with the attitude of overcoming difficulties. Intelligent garbage bin system highly integrated technology is the research focus of international companies. Integrating all the circuits to realize all the functions of intelligent garbage bin system into a silicon chip and drawing out all the interface pins is the ultimate development trend of intelligent garbage bin control 17

3 system in the future. By comparing all the intelligent trash bin control system products on the market today, we can find that the price range of high-end products and low-end products contains a very large part of overlapping areas, and the gap is not very big. At present, the domestic mastery of high-end products research technology is not enough, but the middle and low-end products are not enough. Products and high-end products are not competitive enough in terms of price and performance [5-10]. This paper constructs an automatic control system which can realize the functions of whether the garbage bin is full or not, self-ignition detection, alarm prompt and Bluetooth sending garbage bin usage. The LCD1602 LCD screen circuit is driven by a single chip computer to display the parameters of the garbage bin. The circuit of MQ-2 smoke concentration sensor is configured. It realizes the rapid detection of the spontaneous combustion of garbage in the garbage bin; designs an active buzzer circuit to realize the alarm function when the garbage spontaneous combustion occurs in the intelligent garbage bin or when the garbage is full; configures the HC-05 Bluetooth communication module circuit to send the rubbish bin operation status data to the manager's mobile phone. This paper constructs an automatic control system which can realize the functions of whether the garbage bin is full or not, self-ignition detection, alarm prompt and Bluetooth sending garbage bin usage. The LCD1602 LCD screen circuit is driven by a single chip computer to display the parameters of the garbage bin. The circuit of MQ-2 smoke concentration sensor is configured. It realizes the rapid detection of the spontaneous combustion of garbage in the garbage bin; designs an active buzzer circuit to realize the alarm function when the garbage spontaneous combustion occurs in the intelligent garbage bin or when the garbage is full; configures the HC-05 Bluetooth communication module circuit to send the rubbish bin operation status data to the manager's mobile phone. 2. System Design 2.1 Minimum System Circuit Design This part mainly configures the minimum system circuit of STC89C51 single-chip computer. The minimum system mainly connects STC89C51 single-chip computer chip, reset circuit and crystal oscillator circuit. The following two circuits are configured in turn. The reset circuit is used to restart the C language program of the controller chip. When the reset function is executed, the intelligent garbage bin control system restarts the work from the starting point of the program language, which is equivalent to the restart of the computer. Its circuit principle design is very fixed. It can be configured according to the circuit diagram of Figure 4. 18

4 Fig.1 Reset circuit Clock circuit is used to provide clock signal to STC89C51 single chip computer. This intelligent garbage bin control system uses 12M passive crystal oscillator. Following the figure 2 circuit diagram, the circuit will be able to input 12MHz frequency clock signal to the microprocessor chip, so that the microprocessor chip can. The execution of program statements is based on this clock signal. Fig.2 Clock circuit 2.2 Parameter Display Circuit Design In order to realize the performance of intelligent garbage bin control system in displaying related parameters, the circuit diagram of LCD1602 screen is designed. As shown in figure 3, RS, RW and EN control pins are connected with 32.5, P2.6 and 2.7 GPIO pins of MCU respectively. The eight DB0-DB7 data pins of LCD screen are directly connected with the eight pins of PC port and 8 pins of MCU. When connecting LCD1602 display, because the device needs + 5V voltage to supply power, and the total power supply of intelligent garbage bin system is DC5V, it can directly apply + 5V to pin 2 of LCD1602 display and ground pin 1, so that LCD1602 screen can be controlled by SCM 89C51. 19

5 Fig.3 LCD1602 schematic diagram 2.3 Design of Self Ignition Detection Circuit The MQ-2 sensor chip selected in this graduation project is FootPrint in the form of direct insertion, with a total of six pins. The figure 4 is the schematic configuration of MQ-2 sensor in the intelligent garbage bin system. Because the function of this module has been integrated, it can work only at the upper point, and its digital signal output pin Do is directly in phase with the PI.7 pin of the single chip computer. The output is high and low level signal to indicate whether the garbage is full. Fig.4 MQ-2 smoke sensor schematic 2.4 Design of Full Width Detection Circuit Figure 5 is the schematic design of the empty and full detection circuit of the garbage bin. The infrared tube is used as the core component. The component is installed on the top of the garbage bin. When the garbage bin is full, the module will output low level to the PI.6 pin of the single chip computer, while the garbage bin will output high level when it is not full. 20

6 Fig.5 Principle of empty and full detection 2.5 Alarm Circuit Design For alarm circuit design, because it only has two pins and the number of driving pins is 2, buzzer leads out two pins for users in static parameters. Complete circuit configuration can be completed without additional resistance-capacitance network. As shown in the figure 6, DC 5V DC voltage is applied to the VCC pin of the module. When GND pin is grounded, the power supply only needs to apply a positive 5V DC voltage to the buzzer driving MOS tube, and the gate level of the MOS tube is directly connected with the P2.0 pin of the single chip computer. Fig.6 Principle diagram of active buzzer 2.6 Design of Wireless Transmitting Circuit for Garbage Bin Figure 7 is the final form of the schematic design of HC-05 master-slave Bluetooth module. Although it has six pins, the UART serial port of HC-05 Bluetooth consists of RX and TX pins, in which RX is used to receive data and connect the pin to the P3.1 pin of MCU; TX pin is used to output data and connect the pin to the P3.0 pin of MCU. In this way, the driver of HC-05 Bluetooth can be realized by MCU. In addition, in the aspect of power supply, it is necessary to connect the + 5V voltage to the pin (+5V) of Bluetooth 21

7 module, thus completing the power circuit design. As shown in the figure below, in power supply, only the +5V voltage of the power supply pin of the Bluetooth module is needed. Fig.7 Design circuit of Bluetooth module 3. Conclusion This system is based on STC89C51 single chip computer. That is to say, the smallest system of STC89C51 single chip computer in the system hardware is the core circuit. The key circuit, LCD screen circuit, sensor circuit and so on are constructed around it. The driving of each circuit is realized through each IO interface of the main control processor. Acknowledgements This paper was financially supported by the Research Fund of Suzhou Institute of Industrial Technology (SKYKJ201707), the Young Teachers of Vocational Colleges Enterprise Practice Training Project of Jiangsu Province(2017QYSJPX021), and the Scientific Research Foundation of Suzhou Institute of Industrial Technology (2017kyqd005), to which the authors are deeply indebted. References [1] Supattatham M, Papasratorn B. Design Concept for Garbage Bin with Situation Awareness Feature[M]// Advances in Information Technology. Springer Berlin Heidelberg, 2010: [2] Yi-Nan G E, Pan Y Z, Chen B, et al. Intelligent Controller Design of the Incinerator for Domestic Waste[J]. Measurement & Control Technology, 2008, 27(2): [3] Supattatham M, Papasratorn B. Design Concept for Garbage Bin with Situation Awareness Feature[C]// Advances in Information Technology -, International Conference, Iait 2010, Bangkok, Thailand, November 4-5, Proceedings. DBLP, 2010: [4] Boskovic G, Jovicic N. Fast methodology to design the optimal collection point locations and number of waste bins: A case study[j]. Waste Management & Research the Journal of the International Solid Wastes & Public Cleansing Association Iswa, 2015, 33(12):

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