基于MSP430的低頻功率放大器設(shè)計
上傳時間: 2013-10-09
上傳用戶:1234321@q
對大學(xué)物理實驗中放電法測高阻的傳統(tǒng)實驗,采用單片機(jī)-計算機(jī)接口技術(shù)和模數(shù)變換技術(shù),用計算機(jī)對數(shù)據(jù)進(jìn)行處理得出結(jié)果。它既可以作為自動化測量設(shè)備,也可以作為高年級大學(xué)生課程設(shè)計或畢業(yè)設(shè)計題目,對于拓寬大學(xué)生知識面,提高實際動手能力和解決問題能力有一定的價值。
標(biāo)簽: 89C51 放電 高阻 數(shù)據(jù)
上傳時間: 2013-11-03
上傳用戶:jichenxi0730
單片機(jī)控制的永磁無刷直流電動機(jī)調(diào)速系統(tǒng)適用于電動自行車等小功率的工作情況。并能將多余的電能回潰。該系統(tǒng)具有調(diào)速性能好、功率因數(shù)高、節(jié)能、體積小、重量輕等優(yōu)點。
上傳時間: 2013-10-30
上傳用戶:yqs138168
詳細(xì)介紹了阿爾卡特朗訊1850業(yè)務(wù)傳輸平臺TSS-5通用單板控制器的功能以及MSP430單片機(jī)在PTN產(chǎn)品中的應(yīng)用。TSS-5系統(tǒng)選取MSP430單片機(jī)作為它的通用單板控制器,單板控制器主要用于監(jiān)測外部電壓、電流、探測槽位號、控制面板LED燈、下載FPGA固件、控制外部電壓,監(jiān)測單板鎖存器狀態(tài)以及主板的通訊。最后研發(fā)結(jié)果表明MSP430在TSS-5中得以成功應(yīng)用,為TSS-5產(chǎn)品帶來了很多優(yōu)勢,如高可靠性,低功率消耗,靈活的控制架構(gòu),低廉的成本,易于維護(hù)與升級。
上傳時間: 2013-11-10
上傳用戶:GHF
GPS高精度的時鐘的設(shè)計和實現(xiàn)
上傳時間: 2013-11-25
上傳用戶:caiqinlin
數(shù)字控制的交流調(diào)速系統(tǒng)所選用的微處理器、功率器件及產(chǎn)生PWM波的方法是影響交流調(diào)速系統(tǒng)性能好壞的直接因素。在介紹了正弦脈寬調(diào)制(SPWM)技術(shù)的基礎(chǔ)上,設(shè)計了一種以8098單片機(jī)作為控制器,以智能功率模塊IPM為開關(guān)器件的變頻調(diào)速系統(tǒng)。通過軟件編程,產(chǎn)生正弦脈沖寬度調(diào)制波形來控制絕緣柵雙極晶體管的導(dǎo)通和關(guān)斷,從而達(dá)到控制異步電動機(jī)轉(zhuǎn)速的目的。實驗結(jié)果表明,該系統(tǒng)可調(diào)頻率調(diào)電壓,穩(wěn)定度高,調(diào)速范圍寬,具有較強(qiáng)的實用價值 Abstract: AC variable speed with digital control systems used microprocessors, power devices and generate PWM wave is the direct factors of affecting the performance AC speed regulation system. On the basis of introducing the sinusoidal pulse width modulation (SPWM) technology,this paper designed variable speed system which used 8098 as a controller, intelligent power module IPM as switching device. Through software programming, resulting in sinusoidal pulse width modulation waveform to control the insulated gate bipolar transistor turn on and off, so as to achieve the purpose of speed control of induction motors. Experimental results show that the system can adjust frequency modulation voltage, high stability, wide speed range, has a strong practical value.
標(biāo)簽: 8098 SPWM 單片機(jī) 變頻調(diào)速系統(tǒng)
上傳時間: 2013-11-14
上傳用戶:ynwbosss
為了使音頻信號分析儀小巧可靠,成本低廉,設(shè)計了以2片MSP430F1611單片機(jī)為核心的系統(tǒng)。該系統(tǒng)將音頻信號送入八階巴特沃茲低通濾波器,對信號進(jìn)行限幅放大、衰減、電平位移、緩沖,并利用一單片機(jī)負(fù)責(zé)對前級處理后的模擬信號進(jìn)行采樣,將采集得到的音頻信號進(jìn)行4 096點基2的FFT計算,并對信號加窗函數(shù)提高分辨率,另一單片機(jī)負(fù)責(zé)對信號的分析及控制顯示設(shè)備。此設(shè)計精確的測量了音頻信號的功率譜、周期性、失真度指標(biāo),達(dá)到較高的頻率分辨率,并能將測量結(jié)果通過紅外遙控器顯示在液晶屏上。 Abstract: o make the audio signal analyzer cheaper, smaller and more reliable, this system sends the audio signal to the eight-order butterworth filter, and then amplifies, attenuates, buffers it in a limiting range, transfers the voltage level of the signal before utilizing two MSP430F1611 MCU to realize the audio analysis. One is charged for sampling and dealing with the processed audio signal collected by the 4096 point radix-2 FFT calculation and imposes the window function to improve the frequency resolution. The other one controls the display and realizes the spectrum, periodicity, power distortion analysis in high resolution which is displayed in the LCD screen through the infrared remote control.
上傳時間: 2013-12-11
上傳用戶:jasonheung
為了有效地提升鉛酸蓄電池的使用壽命,同時實現(xiàn)對充電過程的監(jiān)控,設(shè)計出一種用單片機(jī)控制的36 V鉛酸蓄電池充電電源。本電路采用反激式拓?fù)?,連續(xù)電流工作模式,電源管理IC設(shè)計在電源的副邊,由ELAN公司的EM78P258N單片機(jī)模擬,是用可編程器件模擬電源管理IC,實現(xiàn)智能電源低成本化的一次成功嘗試,通過對單片機(jī)的軟件設(shè)計實現(xiàn)了充電電源的狀態(tài)顯示、充電時間控制、報警、過溫保護(hù)、過壓保護(hù)、過流保護(hù)等功能。本充電器真正的實現(xiàn)了鉛酸蓄電池的三段式充電過程,其最高輸出功率可達(dá)90 W,效率約85%,成本不到20元,具有很高的市場競爭力。 Abstract: In order to extend the life of lead-acid battery efficiently and supervise the charging process meanwhile, a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal, charge time control, alarming, thermal protect, current limit and overvoltage protect by the software design. The circuit actually implements the three-step charge process, whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is less than 20 RMB, so that the charger is of powerful market competitiveness.
標(biāo)簽: 單片機(jī)控制 充電電源 鉛酸蓄電池
上傳時間: 2013-11-16
上傳用戶:cepsypeng
針對目前普通日光燈因不能調(diào)節(jié)光強(qiáng)而造成的能源浪費問題,設(shè)計了一種基于單片機(jī)的新型節(jié)能日光燈系統(tǒng),該系統(tǒng)主要分為3個部分,首先采集外界光強(qiáng)信息并將數(shù)據(jù)傳至單片機(jī);隨后單片機(jī)根據(jù)輸入量的不同調(diào)整輸出的PWM波;最后日光燈控制電路通過PWM波的控制,調(diào)節(jié)日光燈兩端的電壓,控制日光燈輸出的光強(qiáng),使日光燈隨外界光強(qiáng)的變化而自動調(diào)整照射光強(qiáng)。經(jīng)過不同外界環(huán)境的實驗調(diào)試,在滿足使用者的用光要求的前提下,日光燈工作穩(wěn)定,功率明顯降低,適宜推廣使用。
標(biāo)簽: 單片機(jī) 節(jié)能 日光燈 系統(tǒng)設(shè)計
上傳時間: 2013-10-29
上傳用戶:蒼山觀海
生活中許多目標(biāo)的高度和水平距離需要進(jìn)行測量。目前主要的測量方法,仍以傳統(tǒng)的皮尺丈量為主,測量效率不高,有時還很不方便,沒有技術(shù)成熟的數(shù)字式測高測距產(chǎn)品。以基本的數(shù)學(xué)方法為理論依據(jù),利用遙控小車做為載體,采用角度傳感器測量角度、霍爾傳感器測量水平距離等,通過單片機(jī)LM3S615進(jìn)行數(shù)據(jù)計算,實現(xiàn)了對待測目標(biāo)物體的高度、水平距離等數(shù)據(jù)的快速、精確和數(shù)字式的測量,高度測量精度可達(dá)99.06%,水平測量精度則可達(dá)98.06%。 Abstract: In our lives, the height and horizontal distance of some goals are needed to be measured. Because the currently used methods are still traditional tape-based measuring methods, and the measuring efficiency is low and inconvenient so some kinds of digital and portable measuring methods or instruments are needed. Based on the basic math theory, this paper designed and manufactured a portable, digital and remote controlled measuring mobile small vehicle, which assembled with angle measuring sensor for angle measurement and Hall sensor for horizontal distance measuring. MCU LM3S615 calculated the height and horizontal distance data gotten from these sensors. The measuring process is simple, the measuring results are more accurate and the measuring efficiency is higher than traditional measure instruments. The accuracy of height and distance measurement can reach 99.06% and 98.06%.
上傳時間: 2013-10-30
上傳用戶:jackandlee
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