外文翻譯---電梯定位控制系統(tǒng)模型的設(shè)計-文庫吧資料
2025-06-13 15:44本頁面
【正文】 MCU achieves the exact location of the elevator through detecting high or low level signal output by parator and the key input signal in the system module. MCU control module and key module design Figure 6 MCU control module and keys module circuits MCU control module and keys module circuit is shown in Figure 6. Keys are defined as follows: key is a start key and the elevator start to rotate when key is pressed. When the elevator is rotating, it will enter to state of emergency (elevator stops at last point along the moving direction) if we press key . , , , are keys for O floor, A floor, B floor, C floor individually. Key is a shift key and the modification item starts flashing and the flashing information can be amended when key is pressed. Key is the enter key. The modification item stops flashing, amendments is over and the elevator runs according to the revised information when key is pressed. We can make more flexible definition of the keys during the course of designing the system software in order to achieve more functions. Display module design LCD1602 display module are adopted and used to display model running status. The information displayed mainly includes the elevator’s current location, operation order, operation time, running status (UP, DOWN, STOP) and so on. 4. SYSTEM SOFTWARE DESIGN The basic idea of the program design is as follows: Firstly, the operation of pressing keys can set the running path of the elevator model. Secondly, infrared binate tubes carry out the realtime detection of the elevator’s location after the elevator starts. Thirdly, MCU scans the infrared circuit I/O port’s realtime detection results. The detection result is lowlevel when the elevator reaches the target floor. Meanwhile, the elevator stops and the array of indicators move back a bit. The elevator will restart if the parison result of the current and the next floor (position of the array indicator) are not consistent. The process repeats until the array bits pointed by array indicator bee zero, and then the elevator stops. In addition, the elevator should increase speed slowly after it starts and reduce speed gradually before it stops in order to smooth the operation of the elevator and avoid vibration or swing. To achieve this goal in the program design, we can control the drive circuit’s pulse signal frequency given by MCU. The elevator’s rotation speed is directly proportional to the pulse signal frequency, which means the higher the pulse signal frequency, the quicker the elevator
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