提出了一種基于C8051F320的列車安全巡檢儀的設(shè)計方案，詳細闡述了巡檢儀的各個模塊的硬、軟件設(shè)計。巡檢儀集信息采集、軸溫檢測、照明和記錄存儲等功能于一體，實現(xiàn)了對列車安全巡檢工作有效的監(jiān)督和科學(xué)管理。系統(tǒng)軟件采用C51編寫，對單片機進行有效的電源管理，保證了巡檢儀的穩(wěn)定性、可靠性和低功耗性。 Abstract: This paper puts forward a design of train safety inspection based on C8051F320,describes all modules hardware and software design of inspection instrument.The inspection instrument has the function of information collection, axle’s temperature detection, lighting and records storage.It can supervise and administer train safety inspection work effectively.The system software using C51 can manage the power of single chip microcomputer, and guarantee the stability, reliability and low power consumption of the inspection instrument.
標(biāo)簽： C8051F320 列車 儀的設(shè)計 巡檢
上傳時間： 2013-12-22
上傳用戶：落花無痕
基于CC1110單片機公交報站系統(tǒng)主要由CC1110單片機最小系統(tǒng)和WT588D語音模塊組成，提出了如何實現(xiàn)語音報站，通過無線通信SimpliciTI網(wǎng)絡(luò)協(xié)議實現(xiàn)公交站臺的自動播報和OLCD液晶顯示公交運行的各類信息。結(jié)果表明，該公交報站系統(tǒng)報站準(zhǔn)確率99%，價格比同類產(chǎn)品下降了300%以上，系統(tǒng)組成結(jié)構(gòu)簡單，提高了系統(tǒng)的抗干擾性和穩(wěn)定性，也便于攜帶。 Abstract: The bus stop announcement system based on CC1110 MCU is composed of CC1110 MCU minimum system and WT588D voice module. How to achieve the voice announcing is put forward.The bus-stop will announce automatically and display on the OLCD by means of wireless communication SimpliciTI network protocol. As a result， the bus station stop announcement systems reported 99% accuracy rate， price of similar products declined by 300% or more， system of simple structure， improve the anti-jamming and stability of the power system， it is also portable.
上傳時間： 2013-10-21
上傳用戶：baby25825
為深入了解基于UC3854A控制的PFC變換器中的動力學(xué)特性，研究系統(tǒng)參數(shù)變化對變換器中分岔現(xiàn)象的影響，在建立Boost PFC變換器雙閉環(huán)數(shù)學(xué)模型的基礎(chǔ)上，用Matlab軟件對變換器中慢時標(biāo)分岔及混沌等不穩(wěn)定現(xiàn)象進行了仿真。在對PFC變換器中慢時標(biāo)分岔現(xiàn)象仿真的基礎(chǔ)上，分析了系統(tǒng)參數(shù)變化對分岔點的影響，并進行了仿真驗證。仿真結(jié)果清晰地顯示了輸入整流電壓的幅值變化對系統(tǒng)分岔點的影響。 Abstract: In order to better understand the dynamics characteristic of power factor correction converter based on UC3854A， and make the way that parameters change influences the bifurcation phenomena of the system clearly. The math model of the two closed loop circuits to the Boost PFC （Power Factor Correction） converter controller was built. Then， with the help of Matlab， the simulation for nonlinear phenomena such as chaos and slow-scale bifurcation in the PFC converter was made. Finally the factors that have influence to the phenomenon of bifurcation under slow-scale in PFC converter were analyzed. The simulation results clearly show the parameters change influences the bifurcation point of the system.
上傳時間： 2013-10-17
上傳用戶：杜瑩12345
介紹一種應(yīng)用于長城賽弗SUV汽車后門車窗多功能控制器，能實現(xiàn)對電動玻璃車窗、車窗雨刮器、噴水器以及電加熱除霜器等控制。介紹了基于NXP P89LPC922單片機多功能汽車后車窗控制器的控制功能、硬件電路原理和軟件設(shè)計方法。 Abstract: This paper presents a multipurpose automotive rear windows controller for CHANGCHENG SAFE SUV.The controller can control rear power-operated window,rear wiping,washing water pump and rear defroster of the windows. In this paper, it is introduced in detail that the functions and the design of the circuit and program of the controller based on NXP P89LPC922 MCU.
上傳時間： 2013-11-13
上傳用戶：z754970244
介紹了電力操作電源與智能電池巡檢系統(tǒng)的特點，給出了一種基于超低功耗單片機MSP430 F149針對中小型變電站自動化運行的專用設(shè)備的基本設(shè)計原理及實現(xiàn)方法，最后給出了詳細硬件構(gòu)成和軟件實現(xiàn)。該系統(tǒng)能滿足中小型變電站安全、可靠、自動運行的要求，并通過與上位機的串行通信實現(xiàn)變電站的遠程管理和控制。 Abstract: The characters of the intelligent battery data logging system of the electric operation power are introduced.The basic design principle and the implemented methods of the special equipment which only designed for the middle or small transformer substation based on MSP430F149 are prescribed. Finally, the hardware block diagram and the software flow chart are also given. The function that the system finally needs to realize can basically meet with the middle or small transformer substation’s satisfy, reliably,and automatic running.And it can also realize the transformer substation long-distance management and control by serial communicating with the host computer.
上傳時間： 2013-11-25
上傳用戶：黃華強
利用AT89C51型單片機定時和中斷功能，配以LM386型音頻功率放大器，構(gòu)成了作息號音自動播放器，為學(xué)校和機關(guān)管理提供方便。 Abstract: Using timing and interrupt function of the AT89C51 single-chip microcomputer and the LM386 audio power amplifier.It is constituted the automatic bugle player.This player facilitates the institution and the school daily management.
上傳時間： 2013-10-10
上傳用戶：wivai
基于幅移鍵控技術(shù)ASK（Amplitude-Shift Keying），以C8051F340單片機作為監(jiān)測終端控制器，C8051F330D單片機作為探測節(jié)點控制器，采用半雙工的通信方式，通過監(jiān)控終端和探測節(jié)點的無線收發(fā)電路，實現(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。試驗表明，探測節(jié)點與監(jiān)測終端的通信距離為24 cm，通過橋接方式，節(jié)點收發(fā)功率為102 mW時，節(jié)點間的通信距離可達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 無線收發(fā) 電路設(shè)計
上傳時間： 2013-10-19
上傳用戶：xz85592677
為解決輸油管道溫度壓力參數(shù)實時監(jiān)測的問題，設(shè)計了以C8051F930單片機作為控制核心的超低功耗輸油管道溫度壓力遠程監(jiān)測系統(tǒng)。現(xiàn)場儀表使用高精度電橋采集數(shù)據(jù)，通過433 MHz短距離無線通信網(wǎng)絡(luò)與遠程終端RTU進行通信，RTU通過GPRS網(wǎng)絡(luò)與PC上位機進行遠程數(shù)據(jù)傳輸，在上位機中實現(xiàn)數(shù)據(jù)存儲和圖形化界面顯示，從而實現(xiàn)輸油管道溫度壓力參數(shù)的實時監(jiān)測和異常報警。經(jīng)實驗證明，該系統(tǒng)的12位數(shù)據(jù)采集精度滿足設(shè)計要求，漏碼率小于1%，正常工作時間超過5個月，能實時有效地監(jiān)測輸油管道的溫度壓力參數(shù)，節(jié)省大量人工成本，有效預(yù)防管道參數(shù)異常造成的經(jīng)濟損失和環(huán)境污染。 Abstract: In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters， the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection， the 433MHz short-range wireless communication network was used to make communication between field instrument and RTU， the GPRS was used by the RTU to transmit data to the PC host computer， and the data was stored and displayed in the PC host computer， so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time， it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.
標(biāo)簽： C8051F930 溫度 壓力 遠程監(jiān)測系統(tǒng)
上傳時間： 2013-11-07
上傳用戶：cuibaigao
The PCF8578 is a low power CMOS1 LCD row and column driver, designed to drive dotmatrix graphic displays at multiplex rates of 1:8, 1:16, 1:24 or 1:32. The device has40 outputs, of which 24 are programmable and configurable for the following ratios ofrows/columns: 32¤8, 24¤16, 16¤24 or 8¤32. The PCF8578 can function as a stand-alone LCDcontroller and driver for use in small systems. For larger systems it can be used inconjunction with up to 32 PCF8579s for which it has been optimized. Together these twodevices form a general purpose LCD dot matrix driver chip set, capable of driving displaysof up to 40960 dots. The PCF8578 is compatible with most microcontrollers andcommunicates via a two-line bidirectional bus (I2C-bus). Communication overhead isminimized by a display RAM with auto-incremented addressing and display bankswitching.
上傳時間： 2013-10-23
上傳用戶：頂?shù)弥?/p>
提出一種基于單片機AT89C51SND1C的MP3播放系統(tǒng)的設(shè)計方案。單片機集成了專用的解碼器，使用K9F1208閃存作為外存儲器，放音電路采用CS4330，存儲文件通過播放器上的USB接口設(shè)備從PC機上直接下載，液晶顯示采用LCD1602。方案設(shè)計簡單，性價比高，低功耗，易擴展。由于采用的是通用單片機實現(xiàn)的，可以很容易地移植到其他微控制器系統(tǒng)中，有很強的市場競爭能力和實用價值。 Abstract: A MP3 player design based on microchip AT89C51SND1C was presented, which used K9F1208 Flash chip as the memory circuit and used CS4330 as play chip. Storage files were download from PC through USB interfaces player on the device，and the LCD/602 was used as display screen. This system had characteristics of simple design,low power,easy expand，low cost and high recognition. Using of universual microchip make it easy to transplant to other microcontrol system，and have strong market competitiom and practical value.
上傳時間： 2014-12-27
上傳用戶：佳期如夢
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