為降低成本和解決現(xiàn)有膜片鉗放大器系統(tǒng)中PC機(jī)的干擾問題,研究了一種基于單片機(jī)的膜片鉗放大器小系統(tǒng)。該系統(tǒng)采用ADI公司生產(chǎn)的ADuC841作為控制核心,并且配置相應(yīng)的液晶顯示模塊LCM3202401。模擬電路部分采用高輸入阻抗的AD8627實(shí)現(xiàn)微電流信號(hào)的采集,并由后級(jí)電路進(jìn)行信號(hào)的放大和電阻電容的補(bǔ)償。它具有硬件電路簡單、體積小、使用方便的特點(diǎn)。既可以單獨(dú)作為小系統(tǒng)實(shí)現(xiàn)采集和顯示,也可以通過紅外方式和PC機(jī)進(jìn)行通訊,在PC機(jī)上進(jìn)行信號(hào)的處理。 Abstract: In order to reduce cost and resolve the interferential problem with PC in existing patch clamp amplifiers, a small patch clamp amplifier system design based on microcontroller is studied. It adopts a new high performance microconverter ADuC841 by the ADI as the control core in the system, configuring a liquid crystal module LCM3202401. In the analog circuit, AD8627 with high input impedance is used to detect the low current,signal magnification, as well as resistance and capacitance compensation are accomplished by subsequent circuits. It has the advantage of simple hardware circuit design, small volume and convenient operation. It can either be used as an independent system to measure and show signal detected or transmit to PC by infrared ray.
上傳時(shí)間: 2013-11-06
上傳用戶:yy_cn
在介紹基于MSP430單片機(jī)的指紋保險(xiǎn)柜工作原理的基礎(chǔ)上,從系統(tǒng)軟件設(shè)計(jì)的角度出發(fā),詳細(xì)介紹了指紋保險(xiǎn)柜軟件的總體分析過程、程序結(jié)構(gòu)的設(shè)計(jì)以及代碼的編寫,給出了按鍵管理流程和部分源代碼。 Abstract: On basis of the operating principle of MSP430 microcontroller-based fingerprint safe,the general analyzing process,program designing and code compiling of the fingerprint safe software are introduced mainly,and the key-press flows chart and some codes according to the system software designing are put forward.
上傳時(shí)間: 2014-12-27
上傳用戶:gaojiao1999
介紹基于ATmega8型單片機(jī)的溫度測量及加熱控制系統(tǒng)。分析系統(tǒng)的工作原理,詳盡討論系統(tǒng)的硬件電路和軟件流程。實(shí)驗(yàn)證明,該系統(tǒng)工作可靠,穩(wěn)定性高。 Abstract: The new temperature measuring and heating control system based on ATmega8 MCU is introduced.The system’s working principles is analyzed.The design principles of hardware and software are also discussed in detail.This system has been testified and it works steady and reliably.
標(biāo)簽: ATmgea8 單片機(jī) 加熱控制
上傳時(shí)間: 2013-11-21
上傳用戶:caiguoqing
對(duì)于瀝青混凝土攤鋪機(jī)自動(dòng)找平控制系統(tǒng)來說,數(shù)字式控制系統(tǒng)的研制是目前的一個(gè)方向。介紹了一種基于CAN總線的數(shù)字式自動(dòng)找平控制系統(tǒng)。該系統(tǒng)以CAN總線作為通信方式,PWM控制信號(hào)通過C8051F040單片機(jī)內(nèi)部PCA可編程計(jì)數(shù)器陣列產(chǎn)生,并具有結(jié)構(gòu)簡單、信號(hào)穩(wěn)定、實(shí)時(shí)性強(qiáng)、易擴(kuò)展的特點(diǎn)。通過硬件實(shí)現(xiàn)和系統(tǒng)運(yùn)行達(dá)到了比較理想的控制效果,驗(yàn)證了系統(tǒng)的可行性。 Abstract: A digital auto-leveling control system based on CAN Bus is introduced.It uses CAN Bus as the method of communication and creates PWM signals by programmable counter array in C8051F040 microcontroller. The system is simple, stable, real-time and expansive.
標(biāo)簽: CAN 總線 數(shù)字式 控制系統(tǒng)設(shè)計(jì)
上傳時(shí)間: 2013-10-09
上傳用戶:ligi201200
介紹以P87LPC764型單片機(jī)為核心的延時(shí)型漏電繼電器設(shè)計(jì)方案。該方案可供用戶選擇實(shí)現(xiàn)額定動(dòng)作電流和5倍額定動(dòng)作電流下不同的延時(shí)動(dòng)作時(shí)間,并有重合閘設(shè)定選擇功能。解決了以往傳統(tǒng)分立元件帶來的延時(shí)時(shí)間離散性大且不易實(shí)現(xiàn)的弊端。 Abstract: In this paper, the delay leakage relay based on P87LPC764 is introduced in detail. This system provides different relay times at rating current and 5× rating current for users and also offers superposition brake set selection function. So that it resolves many traditional problems.
上傳時(shí)間: 2013-11-08
上傳用戶:zhaiye
介紹了CAN總線和P87C591單片機(jī)的特點(diǎn),給出了基于P87C591單片機(jī)的信號(hào)采集節(jié)點(diǎn)的軟、硬件設(shè)計(jì),指出了硬件電路設(shè)計(jì)中應(yīng)注意的問題,在軟件設(shè)計(jì)中重點(diǎn)介紹了節(jié)點(diǎn)初始化、報(bào)文發(fā)送和報(bào)文接收等子程序。 Abstract: The features of CAN Bus and the microcontroller P87C591 are introduced, and the design of hardware circuit and soft configuration of the signals collection node based on P87C591 are presented. The problems in designing hardware circuit are discussed.Initialization subprogram, transmiting subprogram and receiving subprogram are emphasized in soft configuration.
標(biāo)簽: P87C591 信號(hào)采集 節(jié)點(diǎn)
上傳時(shí)間: 2013-11-03
上傳用戶:BIBI
基于幅移鍵控技術(shù)ASK(Amplitude-Shift Keying),以C8051F340單片機(jī)作為監(jiān)測終端控制器,C8051F330D單片機(jī)作為探測節(jié)點(diǎn)控制器,采用半雙工的通信方式,通過監(jiān)控終端和探測節(jié)點(diǎn)的無線收發(fā)電路,實(shí)現(xiàn)數(shù)據(jù)的雙向無線傳輸。收發(fā)電路采用直徑為0.8 mm的漆包線自行繞制成圓形空心線圈天線,天線直徑為(3.4±0.3)cm。試驗(yàn)表明,探測節(jié)點(diǎn)與監(jiān)測終端的通信距離為24 cm,通過橋接方式,節(jié)點(diǎn)收發(fā)功率為102 mW時(shí),節(jié)點(diǎn)間的通信距離可達(dá)20 cm。與傳統(tǒng)無線收發(fā)模塊相比,該無線收發(fā)電路在受體積、功耗、成本限制的場合有廣闊的應(yīng)用前景。 Abstract: Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller, using half-duplex communication mode, this paper achieves bi-directional data transfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter (3.4±0.3) cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm,the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules, the circuit has wide application prospect in small size, low cost and low power consumption and other characteristics.
標(biāo)簽: C8051F 單片機(jī) 無線收發(fā) 電路設(shè)計(jì)
上傳時(shí)間: 2013-10-19
上傳用戶:xz85592677
在需要實(shí)時(shí)大量輸入漢字的顯示控制處理應(yīng)用中,利用傳統(tǒng)單片機(jī)實(shí)現(xiàn)顯示控制的設(shè)計(jì)方法是較難實(shí)現(xiàn)的。帶漢字字庫的液晶模塊的使用使得小容量ROM單片機(jī)的大量漢字信息輸入與顯示成為可能。提出了針對(duì)漢字字庫編碼的二級(jí)索引拼音輸入檢索方法,介紹了以ST7920作為控制器的帶漢字字庫的液晶顯示模塊的接口方法及漢字顯示和控制原理,給出了通用計(jì)算機(jī)鍵盤在單片機(jī)中的串行接口,采用該技術(shù)可大大增強(qiáng)單片機(jī)的漢字輸入功能。為小容量ROM單片機(jī)的大批量漢字信息處理提供了一種漢字輸入解決方案。 Abstract: It is difficult to realize Chinese characters input method based on the embedded system by using the traditional design method of display control. It is possible to input and display Chinese characters based on the embedded system with the ROM of small content by using the LCD module with Chinese characters.Chinese characters input method of the quadric index recall in allusion to Chinese characters code is brought forward.The interface and the principle of Chinese characters display control based on the LCD module controlled with the ST7920 is introduced too.The serial interface of the computer keyboard in common use and the embedded system is given at the same time. It can enhance the embedded system function of Chinese characters input by using this technology, and provide a kind of Chinese characters input scheme for the embedded system with small capacity ROM.
上傳時(shí)間: 2013-11-19
上傳用戶:jhksyghr
為解決傳統(tǒng)可視倒車?yán)走_(dá)視頻字符疊加器結(jié)構(gòu)復(fù)雜,可靠性差,成本高昂等問題,在可視倒車?yán)走_(dá)設(shè)計(jì)中采用視頻字符發(fā)生器芯片MAX7456。該芯片集成了所有用于產(chǎn)生用戶定義OSD,并將其插入視頻信號(hào)中所需的全部功能,僅需少量的外圍阻容元件即可正常工作。給出了以MAX7456為核心的可視倒車?yán)走_(dá)的軟、硬件實(shí)現(xiàn)方案及設(shè)計(jì)實(shí)例。該方案具有電路結(jié)構(gòu)簡單、價(jià)格低廉、符合人體視覺習(xí)慣的特點(diǎn)。經(jīng)實(shí)際裝車測試,按該方案設(shè)計(jì)的可視倒車?yán)走_(dá)視場清晰、提示字符醒目、工作可靠,可有效降低駕駛員倒車時(shí)的工作強(qiáng)度、減少倒車事故的發(fā)生。 Abstract: A new video and text generation chip,MAX7456,was used in the design of video parking sensor in order to simplify system structure,improve reliability and reduce cost. This chip included all the necessary functions to generate user-defined OSDs and to add them into the video signals. It could be put into work with addition of just a small number of resistances and capacitors. This paper provided software and hardware implementation solutions and design example based on the chip. The system had the characteristics of simplicity in circuit structure,lower cost,and comfort for the nature of human vision. Loading road test demonstrates high video and text display quality and reliable performance,which makes the driver easy to see backward and reduces chance of accidents.
標(biāo)簽: 7456 MAX 可視倒車 中的應(yīng)用
上傳時(shí)間: 2013-12-10
上傳用戶:qiaoyue
針對(duì)船舶氣象儀保障維修而設(shè)計(jì)的船舶氣象儀測試系統(tǒng),包括信息處理終端、主儀器檢測模塊、傳感器檢測模塊,各個(gè)模塊都采用基于AVR單片機(jī)的嵌入式系統(tǒng),模塊之間通過CAN總線進(jìn)行通信。結(jié)果表明,船舶氣象儀測試系統(tǒng)能夠快速檢測船舶氣象儀故障,與單純依靠人工方式排查故障相比,故障檢測時(shí)間縮短了60%以上。 Abstract: The test system of ship meteorological instrument was developed to satisfy the maintenance of ship meteorological instruments,which composed of information processing terminal, testing module of main instrument and testing module of sensors. Each of these modules included an embedded system based on microcontroller of AVR series and communicated with other module by CAN bus. The results show that the test system can judge the fault of ship meteorological instrument quickly and shorten the fault detection time as much as 60% compared with simple manual troubleshooting.
標(biāo)簽: AVR 單片機(jī) 氣象儀 測試系統(tǒng)
上傳時(shí)間: 2013-11-23
上傳用戶:stvnash
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