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  本文關(guān)鍵詞： 文檢儀 步進電機 P89C669 P89LPC922 控制系統(tǒng)　出處：《北京交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：近幾十年來,隨著各國學者對文檢技術(shù)的研究,文檢技術(shù)得到了很大提高,但由于文件制成時間檢驗受到多方面因素的影響,文檢技術(shù)仍然具有很多難點。文檢技術(shù)在各種案件糾紛中發(fā)揮著重要作用,用于文件制成時間檢驗的文件制成時間檢驗儀,簡稱文檢儀,也得到了廣泛的應(yīng)用。 通過在要檢驗文件的文字上添加一定量的化學試劑,通過化學反應(yīng),再進行相應(yīng)的分析,可以實現(xiàn)文件時間檢驗。本文設(shè)計的基于單片機的步進電機控制系統(tǒng),可以應(yīng)用在文檢儀中。步進電機將接收到的數(shù)字脈沖信號轉(zhuǎn)換成線位移或者角位移,具有很好的定位精度；采用單片機實現(xiàn)對電機的控制,具有輸出脈沖準確、實時性強和功能靈活等優(yōu)點,并且簡化了硬件線路,降低了成本,提高了系統(tǒng)的可靠性。從而將該步進電機控制系統(tǒng)應(yīng)用在文檢儀中,可以實現(xiàn)注液器的準確定位和注液量的精確控制,以及物鏡、轉(zhuǎn)臺等的精確調(diào)節(jié)。通過該步進電機控制系統(tǒng),可以準確地實現(xiàn)在文件的檢測位置上精確添加一定量的化學試劑。 本文系統(tǒng)地介紹了步進電機控制系統(tǒng),包括各功能模塊的選擇方案論證、設(shè)計和調(diào)試。該系統(tǒng)主要由上位機人機交互界面模塊,串口通信模塊,主控模塊,6個被控模塊以及6個電機驅(qū)動模塊構(gòu)成。 上位機人機交互界面是通過使用VC++6.0軟件完成設(shè)計的。主控模塊選擇Philips公司推出的單片機P89C669作為微處理器完成設(shè)計,通過硬件電路的設(shè)計和軟件部分的設(shè)計實現(xiàn)指令的接收,分析和發(fā)送等功能。被控模塊選擇Philips公司推出的單片機P89LPC922作為微處理器完成設(shè)計,實現(xiàn)了與主控模塊之間的通信、指令的接收和發(fā)送等功能。串口通信模塊采用集成芯片MAX232設(shè)計,實現(xiàn)TTL標準電平與EIA標準電平的轉(zhuǎn)換。電機驅(qū)動模塊則采用芯片L289N實現(xiàn)電路設(shè)計,接收被控模塊的控制脈沖,并驅(qū)動步進電機的運行。 最后通過對各功能模塊的調(diào)試及功能模塊之間數(shù)據(jù)通信的調(diào)試,驗證了該系統(tǒng)能夠?qū)崿F(xiàn)對電機運行狀態(tài)的精確控制,從而確保文檢儀能夠?qū)崿F(xiàn)注液、物鏡、轉(zhuǎn)臺等的精確調(diào)節(jié)。
[Abstract]:In recent decades, with the research of document checking technology, the document retrieval technology has been greatly improved, but due to the time of document making, it is affected by many factors. Document checking technology still has a lot of difficulties. Document inspection technology plays an important role in all kinds of case disputes. It has also been widely used. By adding a certain amount of chemical reagents to the text of the document to be examined, and through the chemical reaction, the corresponding analysis is carried out. The stepper motor control system based on single chip microcomputer can be used in the document checker. The step motor converts the received digital pulse signal into linear displacement or angular displacement. Good positioning accuracy; The single chip microcomputer is used to control the motor, which has the advantages of accurate output pulse, strong real-time and flexible function, and simplifies the hardware circuit and reduces the cost. The reliability of the system is improved, so that the stepper motor control system can be applied to the instrument, which can realize the accurate location of the injector and the accurate control of the liquid injection quantity, as well as the objective lens. Through the step motor control system, we can accurately add a certain amount of chemical reagents to the detecting position of the file. This paper systematically introduces the stepper motor control system, including the selection, demonstration, design and debugging of each functional module. The system is mainly composed of upper computer man-machine interface module, serial communication module, main control module. Six controlled modules and six motor driving modules are formed. The man-machine interface of the host computer is designed by using VC 6.0 software. The main control module selects P89C669 of Philips company as the microprocessor to complete the design. The instruction is received through the design of hardware circuit and software part. Analysis and transmission functions. The controlled module selected the MCU P89LPC922 from Philips Company as the microprocessor to complete the design, and realized the communication with the main control module. The serial communication module is designed by integrated chip MAX232. The motor drive module uses the chip L289N to realize the circuit design, receives the controlled module control pulse, and drives the step motor operation. Finally, through the debugging of each functional module and the debugging of the data communication between the functional modules, it is verified that the system can realize the accurate control of the running state of the motor, so as to ensure that the instrument can realize the liquid injection and objective lens. Precise adjustment of turntable, etc.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP273;TM383.6

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本文編號：1460159