外文翻譯---電梯定位控制系統(tǒng)模型的設(shè)計(jì)-預(yù)覽頁
【正文】 ical amp。 the elevator’s running location is detected by the infrared binate tubes. Stepper motor is the executive ponent. MCU controls the speed and direction of the stepper motor by inputting pulse signals to its drive chip L298. LCD displays the realtime information of elevator’s running status. Key Words: ATmega128 microcontroller, stepper motor, drive chip L298, infrared detection circuit. 1. INTRODUCTION A fourfloor elevator system module is designed in this paper. The object of elevator system module is shown in figure 1. The size of the model and the distance between the layers are shown in the figure. The system model provides an intuitional and thorough description for the construction and action principle of elevator, and gives a platform for the further research of the new elevator control technologies. It has a certain reference in relevant professional experiments teaching. It can be chosen as a teaching model for university teachers when they instruct stepper motor’s drive and control. In addition, the model has a certain value for research and development of highrise elevator control software. 2. SYSTEM STRUCTURE AND WORKING PRINCIPLE The basic structure diagram of the elevator positioning control system model is shown in Figure 2. The model includes MCU control module, stepper motor drive module, infrared detection module, LCD module and keys module. The elevator’s running path is set up by keys。 Information， Hangzhou Dianzi University Hangzhou, Zhejiang, 310018 The People’s Republic of China ABSTRCT This paper presents a design of elevator positioning control system model based on the ATmega128 microcontroller. The model mainly includes MCU control module, stepper motor drive module, infrared detection module, LCD display module and keys module. The elevator’s running path is set by keys。 Innovation of Machinery amp。該 模型主要包括單片機(jī)控制模塊，步進(jìn)電機(jī)驅(qū)動模塊，紅外檢測模塊，液晶顯示器顯示模塊和按鍵模塊。 關(guān)鍵詞： ATmega128單片機(jī)，步進(jìn)電機(jī)， 驅(qū)動器芯片 L298，紅外檢測電路。系統(tǒng)模型為電梯的結(jié)構(gòu)以及運(yùn)行原理提供了一個直觀和全面的描述，并為進(jìn)一步研究新的電梯控制技術(shù)提供平臺。 2 系統(tǒng)結(jié)構(gòu)及工作原理 電梯定位控制系統(tǒng)模型基本結(jié)構(gòu)框圖如圖 2所示。當(dāng)由按鍵輸入停止信息時，電梯停運(yùn)，此時，由 紅外探測電路測得的當(dāng)前位置的 反 饋信號就是電梯的實(shí)時運(yùn)行狀態(tài)，此狀態(tài)將通過 LCD1602顯示出來。 步進(jìn)電機(jī)轉(zhuǎn)速與輸入脈沖頻率成正比，這意味著脈沖的輸入頻率越高，步進(jìn)電機(jī)的旋轉(zhuǎn)速度越快，反之亦然。當(dāng) Q1， Q4斷開，形成續(xù)流回路如下：接地 → VD3→ 步進(jìn)電機(jī) → VD2→ 虛擬通道連接。紅外發(fā)光管安裝在 O，A， B， C點(diǎn)。 在 B點(diǎn)的參考電壓大約是 （由調(diào)整10K 電位器來實(shí)現(xiàn)），比較器輸出端口連接 10K 上拉電阻。 單片機(jī)控制模塊和鍵模塊設(shè)計(jì) 單片機(jī)控制模塊和按鍵模塊電路如圖 6 所示。鍵 。顯示的信息主要包括電梯的當(dāng)前位置，運(yùn)行秩序，運(yùn)行時間，運(yùn)行狀態(tài)（上，下，停）等等。電梯到達(dá)目標(biāo)地后，檢測結(jié)果是低電平。此外，電梯啟動后應(yīng)緩慢增加速 度并且在停止前逐漸減小速度，以使電梯平穩(wěn)運(yùn)行，避免振動或擺動。同樣，單片機(jī)輸出越來越低頻率的脈沖信號到驅(qū)動電路，以實(shí)現(xiàn)電梯的減速。該系統(tǒng)可通過某些按鍵進(jìn)入緊急情況 。液晶顯示器顯示信息豐富，顯示器接口通用
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