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  • NLMS algorithm demo Note : The author doesn t take any responsibility for any harm caused by the us

    NLMS algorithm demo Note : The author doesn t take any responsibility for any harm caused by the use of this file

    標簽: responsibility algorithm any author

    上傳時間: 2015-09-28

    上傳用戶:784533221

  • Over the past years, we have witnessed destructions of various kinds caused by human actions. As a u

    Over the past years, we have witnessed destructions of various kinds caused by human actions. As a university student, write a letter to our society to

    標簽: destructions witnessed actions various

    上傳時間: 2014-11-23

    上傳用戶:一諾88

  • 基準電壓的溫度漂移研究應用筆記

    Abstract: A perfect voltage reference produces a stable voltage independent of any external factors. Real-world voltagereferences, of course, are subject to errors caused by many external factors. One causeof these major errors istemperature. Without care, it is easy to operate a voltage reference outside its operating temperature range. Thisapplication note describes how references respond to temperature changes, and how self-heating can cause a voltagereference to operate outside its recommended temperature range. Once understood, this knowledge can then be used toavoid making this design error.

    標簽: 基準電壓 溫度漂移 應用筆記

    上傳時間: 2013-11-08

    上傳用戶:xianglee

  • 基于PIC16C71的數(shù)字水溫配制閥的設計

      設計了一種基于PIC16C71單片機的數(shù)字水溫配制閥。該配制閥采用NTC熱敏電阻作溫度傳感器,與固定電阻組成簡單分壓電路作為水溫測量電路,利用PIC16C71單片機內置的8位A/D轉換器把熱敏電阻上的模擬電壓轉換為數(shù)字量,PIC16C71單片機控制直流電機驅動混水閥調節(jié)冷熱水的混合比例實現(xiàn)水溫調節(jié)。給出了控制電路圖,對水溫測量電路的參數(shù)選擇和測溫精度作了詳細討論。實驗和分析表明,選用阻值較大的NTC熱敏電阻和分壓電阻可較好地解決熱敏電阻因功耗較大造成的熱擊穿問題。   Abstract:   A digital valve for controlling water temperature based on PIC16C71 was presented in this paper.A bleeder circuit which consisted of a NTC thermistor as temperature sensor and a fixed resistance was designed as water temperature measuring circuit.The analog voltage on the thermistor was converted into digital signal by a 8-bit A/D converter embedded in PIC16C71. Based on the digital signal, the MCU PIC16C71 drived the valve by a DC motor to adjust the water temperature through adjusting the proportion of hot water and cold water.The circuit diagram of controller was given,the principle,the component parameters and the accuracy of measuring temperatures were also dissertated in detail. It was found by experiment and analysis that thermal breakdown of thermistor caused by high power could be solved by selecting thermistor and fixed resistance with high impedance value.

    標簽: PIC 16C C71 16

    上傳時間: 2013-11-08

    上傳用戶:Yue Zhong

  • NXP P89LPC901單片機汽車起動保護控制器設計

    在汽車發(fā)動機起動時,若發(fā)動機起動后起動機不能及時斷電,將會燒毀起動機或損壞飛輪齒環(huán);若變速器不在空檔位置起動,則起動機的瞬間動力將使汽車位移,還可能引起交通事故和人身安全。為此介紹一種利用NXP P89LPC901單片機控制的汽車起動保護控制器,通過檢測汽車起動開關、變速箱檔位、發(fā)動機轉速,實現(xiàn)對汽車發(fā)動機起動過程檢測和保護。起動保護控制器在發(fā)動機起動過程中通過采用逐個關閉打開負載系統(tǒng),解決汽車發(fā)動機過程中因起動電流大而對汽車電源的沖擊影響,延長了電瓶壽命。 Abstract:  When the automotive engine is started, the engine start motor and flywheel gear may be damaged, even traffic accidents and personal safeties may be caused by wrong operation or other factors.In order to ensure the automotive engine can be started normally and safely,it is necessary that the protecting measures and methods are considered in the automotive electrical control system.This paper introduces a kind of the automotive engine starting protect controller based on NXP P89LPC901 MCU.The controller can protect the engine starting process by detecting the starter key switch,transmission stall and engine speed.Through the use of close and open load system,the controller can solve the impact on automotive power because of the high-current load in the process of the automobile engine starting, and extend battery life.

    標簽: NXP LPC 901 P89

    上傳時間: 2013-10-15

    上傳用戶:mikesering

  • 基于C8051F930的管道溫度壓力遠程監(jiān)測系統(tǒng)

       為解決輸油管道溫度壓力參數(shù)實時監(jiān)測的問題,設計了以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)?,F(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)絡與遠程終端RTU進行通信,RTU通過GPRS網(wǎng)絡與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

  • An easy way to work with Exter

    Internal Interrupts are used to respond to asynchronous requests from a certain part of themicrocontroller that needs to be serviced. Each peripheral in the TriCore as well as theBus Control Unit, the Debug Unit, the Peripheral Control Processor (PCP) and the CPUitself can generate an Interrupt Request.So what is an external Interrupt?An external Interrupt is something alike as the internal Interrupt. The difference is that anexternal Interrupt request is caused by an external event. Normally this would be a pulseon Port0 or Port1, but it can be even a signal from the input buffer of the SSC, indicatingthat a service is requested.The User’s Manual does not explain this aspect in detail so this ApNote will explain themost common form of an external Interrupt request. This ApNote will show that there is aneasy way to react on a pulse on Port0 or Port1 and to create with this impulse an InterruptService Request. Later in the second part of the document, you can find hints on how todebounce impulses to enable the use of a simple switch as the input device.Note: You will find additional information on how to setup the Interrupt System in theApNote “First steps through the TriCore Interrupt System” (AP3222xx)1. It would gobeyond the scope of this document to explain this here, but you will find selfexplanatoryexamples later on.

    標簽: Exter easy work with

    上傳時間: 2013-10-27

    上傳用戶:zhangyigenius

  • 3.3v看門狗芯片

    The STWD100 watchdog timer circuits are self-contained devices which prevent systemfailures that are caused by certain types of hardware errors (non-responding peripherals,bus contention, etc.) or software errors (bad code jump, code stuck in loop, etc.).The STWD100 watchdog timer has an input, WDI, and an output, WDO (see Figure 2). Theinput is used to clear the internal watchdog timer periodically within the specified timeoutperiod, twd (see Section 3: Watchdog timing). While the system is operating correctly, itperiodically toggles the watchdog input, WDI. If the system fails, the watchdog timer is notreset, a system alert is generated and the watchdog output, WDO, is asserted (seeSection 3: Watchdog timing).The STWD100 circuit also has an enable pin, EN (see Figure 2), which can enable ordisable the watchdog functionality. The EN pin is connected to the internal pull-downresistor. The device is enabled if the EN pin is left floating.

    標簽: 3.3 看門狗 芯片

    上傳時間: 2013-10-22

    上傳用戶:taiyang250072

  • 卡爾曼濾波器matlab程序

    load initial_track  s; % y:initial data,s:data with noiseT=0.1; % yp denotes the sample value of position% yv denotes the sample value of velocity% Y=[yp(n);yv(n)];% error deviation caused by the random acceleration % known dataY=zeros(2,200);Y0=[0;1];Y(:,1)=Y0;A=[1 T    0 1];          B=[1/2*(T)^2 T]';H=[1 0]; C0=[0 0    0 1];C=[C0 zeros(2,2*199)];Q=(0.25)^2; R=(0.25)^2;

    標簽: matlab 卡爾曼濾波器 程序

    上傳時間: 2014-12-28

    上傳用戶:asaqq

  • * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS AND ANY EXPRESS * OR IMPLIED WARRANTIES, INC

    * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES LOSS OF USE, DATA, OR PROFITS OR BUSINESS * INTERRUPTION) HOWEVER caused AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH D

    標簽: WARRANTIES SOFTWARE PROVIDED EXPRESS

    上傳時間: 2013-12-20

    上傳用戶:sxdtlqqjl

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