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short-Time

  • 基于單片機(jī)的紅外測溫裝置設(shè)計(jì)

    溫度控制如今已成為當(dāng)代社會研究的熱點(diǎn)之一,而溫度檢測在現(xiàn)代設(shè)備參數(shù)檢測中也是一項(xiàng)極其重要的技術(shù),應(yīng)用十分廣泛。與傳統(tǒng)的測溫方法相比,紅外測溫方法具有時(shí)間短、精度高、使用簡單方便等優(yōu)點(diǎn)。本文以環(huán)境溫度為被測對象,設(shè)計(jì)了以STC89C52單片機(jī)為控制中心的紅外測溫裝置,能夠?qū)崿F(xiàn)對目標(biāo)溫度的實(shí)時(shí)采集、處理、顯示和報(bào)警等功能。本設(shè)計(jì)主要是由STC89C52單片機(jī)、紅外測溫傳感器、LCD1602液晶顯示器、按鍵和蜂鳴器等部分組成,采用非接觸的方式對目標(biāo)溫度進(jìn)行實(shí)時(shí)檢測。Temperature control has become one of the hotspots in contemporary social research,and temperature detection is an extremely important technology in modern equipment parameter detection.Compared with traditional method,the infrared temperature measuring method has advantages of short time,high precision and convenient operation,etc.This paper consider environment temperature as research objects and designs an infrared temperature measuring device which employs the STC89C52singlechipas-control center,and it can realize timely collection,processing,display and alarm function of the target temperature.The design is mainly composed of STC89C52 singlechip,infrared temperature sensor,LCD1602monitor,keys and buzzer,etc.This design detects the target temperature by non-contact method.

    標(biāo)簽: 單片機(jī) 紅外測溫

    上傳時(shí)間: 2022-03-27

    上傳用戶:jiabin

  • i have no time , for short, this is about serial port communication in VC envirement.

    i have no time , for short, this is about serial port communication in VC envirement.

    標(biāo)簽: communication envirement serial about

    上傳時(shí)間: 2014-11-01

    上傳用戶:comua

  • For the practicing programmer with little time to spare, Essential C++ offers a fast-track to learn

    For the practicing programmer with little time to spare, Essential C++ offers a fast-track to learning and working with C++ on the job. This book is specifically designed to bring you up to speed in a short amount of time. It focuses on the elements of C++ programming that you are most likely to encounter and examines features and techniques that help solve real-world programming challenges.

    標(biāo)簽: practicing fast-track programmer Essential

    上傳時(shí)間: 2017-03-29

    上傳用戶:洛木卓

  • This short paper will give you some VHDL code examples that will help you design synchronous circuit

    This short paper will give you some VHDL code examples that will help you design synchronous circuits that work first time.The philosophy behind Ten-Commandment code is that synthesizers are not to be trusted too much. Most of the code you will see is close to the structural level some more overtly than others.

    標(biāo)簽: will synchronous you examples

    上傳時(shí)間: 2014-12-01

    上傳用戶:sjyy1001

  • stbc_ofdm(time)

    從時(shí)域分析比較了ofdm和stbc與ofdm結(jié)合的性能差別-from time-domain analysis and comparison of OFDM stbc OFDM combined wi

    標(biāo)簽: stbc_ofdm time

    上傳時(shí)間: 2013-06-05

    上傳用戶:caozhizhi

  • MAX17600數(shù)據(jù)資料

     The MAX17600–MAX17605 devices are high-speedMOSFET drivers capable of sinking /sourcing 4A peakcurrents. The devices have various inverting and noninvertingpart options that provide greater flexibility incontrolling the MOSFET. The devices have internal logiccircuitry that prevents shoot-through during output-statchanges. The logic inputs are protected against voltagespikes up to +14V, regardless of VDD voltage. Propagationdelay time is minimized and matched between the dualchannels. The devices have very fast switching time,combined with short propagation delays (12ns typ),making them ideal for high-frequency circuits. Thedevices operate from a +4V to +14V single powersupply and typically consume 1mA of supply current.The MAX17600/MAX17601 have standard TTLinput logic levels, while the MAX17603 /MAX17604/MAX17605 have CMOS-like high-noise margin (HNM)input logic levels. The MAX17600/MAX17603 are dualinverting input drivers, the MAX17601/MAX17604 aredual noninverting input drivers, and the MAX17602 /MAX17605 devices have one noninverting and oneinverting input. These devices are provided with enablepins (ENA, ENB) for better control of driver operation.

    標(biāo)簽: 17600 MAX 數(shù)據(jù)資料

    上傳時(shí)間: 2013-12-20

    上傳用戶:zhangxin

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

       為解決輸油管道溫度壓力參數(shù)實(shí)時(shí)監(jiān)測的問題,設(shè)計(jì)了以C8051F930單片機(jī)作為控制核心的超低功耗輸油管道溫度壓力遠(yuǎn)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(yuǎn)程終端RTU進(jìn)行通信,RTU通過GPRS網(wǎng)絡(luò)與PC上位機(jī)進(jìn)行遠(yuǎn)程數(shù)據(jù)傳輸,在上位機(jī)中實(shí)現(xiàn)數(shù)據(jù)存儲和圖形化界面顯示,從而實(shí)現(xiàn)輸油管道溫度壓力參數(shù)的實(shí)時(shí)監(jiān)測和異常報(bào)警。經(jīng)實(shí)驗(yàn)證明,該系統(tǒng)的12位數(shù)據(jù)采集精度滿足設(shè)計(jì)要求,漏碼率小于1%,正常工作時(shí)間超過5個(gè)月,能實(shí)時(shí)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(jì)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(yuǎn)程監(jiān)測系統(tǒng)

    上傳時(shí)間: 2013-11-07

    上傳用戶:cuibaigao

  • HT47R20A-1時(shí)基(Time Base)使用介紹

    HT47R20A-1時(shí)基(Time Base)使用介紹 HT47 系列單片機(jī)的時(shí)基可提供一個(gè)周期性超時(shí)時(shí)間周期以產(chǎn)生規(guī)則性的內(nèi)部中斷。時(shí)基的時(shí)鐘來源可由掩膜選擇設(shè)定為WDT 時(shí)鐘、RTC 時(shí)鐘或指令時(shí)鐘(系統(tǒng)時(shí)鐘/4);其超時(shí)時(shí)間范圍可由掩膜選擇設(shè)定為“時(shí)鐘來源”/212~“時(shí)鐘來源”/215。如果時(shí)基發(fā)生超時(shí)現(xiàn)象,則其對應(yīng)的中斷請求標(biāo)志(TBF)會被置位,如果中斷允許,則產(chǎn)生一個(gè)中斷服務(wù)到08H 的地址。

    標(biāo)簽: Base Time HT 47

    上傳時(shí)間: 2013-11-15

    上傳用戶:13925096126

  • 快速跳頻通信系統(tǒng)同步技術(shù)研究

    同步技術(shù)是跳頻通信系統(tǒng)的關(guān)鍵技術(shù)之一,尤其是在快速跳頻通信系統(tǒng)中,常規(guī)跳頻通信通過同步字頭攜帶相關(guān)碼的方法來實(shí)現(xiàn)同步,但對于快跳頻來說,由于是一跳或者多跳傳輸一個(gè)調(diào)制符號,難以攜帶相關(guān)碼。對此引入雙跳頻圖案方法,提出了一種適用于快速跳頻通信系統(tǒng)的同步方案。采用短碼攜帶同步信息,克服了快速跳頻難以攜帶相關(guān)碼的困難。分析了同步性能,仿真結(jié)果表明該方案同步時(shí)間短、虛警概率低、捕獲概率高,同步性能可靠。 Abstract:  Synchronization is one of the key techniques to frequency-hopping communication system, especially in the fast frequency hopping communication system. In conventional frequency hopping communication systems, synchronization can be achieved by synchronization-head which can be used to carry the synchronization information, but for the fast frequency hopping, Because modulation symbol is transmitted by per hop or multi-hop, it is difficult to carry the correlation code. For the limitation of fast frequency hopping in carrying correlation code, a fast frequency-hopping synchronization scheme with two hopping patterns is proposed. The synchronization information is carried by short code, which overcomes the difficulty of correlation code transmission in fast frequency-hopping. The performance of the scheme is analyzed, and simulation results show that the scheme has the advantages of shorter synchronization time, lower probability of false alarm, higher probability of capture and more reliable of synchronization.

    標(biāo)簽: 快速跳頻 同步技術(shù) 通信系統(tǒng)

    上傳時(shí)間: 2013-11-23

    上傳用戶:mpquest

  • Backpropagation Network Time-Series Forecasting 源碼, 經(jīng)典的BPN人工神經(jīng)網(wǎng)絡(luò)例子源碼

    Backpropagation Network Time-Series Forecasting 源碼, 經(jīng)典的BPN人工神經(jīng)網(wǎng)絡(luò)例子源碼

    標(biāo)簽: Backpropagation Forecasting Time-Series Network

    上傳時(shí)間: 2015-01-05

    上傳用戶:tb_6877751

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