數(shù)據(jù)采集外文翻譯(已改無錯(cuò)字)
2022-12-14 02:06:06 本頁面
【正文】 nchronous sampling method is two kinds. Software is synchronous sampling method by micro controller (MCU) or DSP provide synchronized sampling pulse, first measured the measured signal, the sampling interval period T Δ T = T/N (N for week of sampling points), Thus the count value determined timer,Use timing interrupt way realization synchronous sampling. The advantage of this method is no hardware synchronous circuit, simple structure .This topic will be the eventual realization of access to embedded systems， the realization of the power measurement and monitoring,monitoring system to meet the electricity work,intelligence requirement,it promote the development of remote monitoring services,bringing a certain degree of effectiveness. On the fundamental reactive current and harmonic current detection, there are mainly 2 ways: First, the instantaneous reactive power theory based method, the second is based on adaptive cancellation addition, there are other nonmainstream approach, such as fast Fourier transform method, wavelet transform. Instantaneous power theory based on the method of offensive principles are: a threephase current detection and load phase voltage A, the coordinate transformation, twophase stationary coordinate system the current value, calculate the instantaneous active and instantaneous reactive power ip iq,then after coordinate transformation, threephase fundamental active current, with the final load current minus the fundamental current, active power and harmonic currents are fundamental iah, ibhi, ich. From:Principles of Data Acquisitio 數(shù)據(jù)采集 目前，我國(guó)高校公寓管理正在向著正規(guī)化、市場(chǎng)化發(fā)展，在不斷提高學(xué)生方便用電的同時(shí)，用電事故頻有發(fā)生，雖然部分高校公寓已經(jīng)安裝了 電能計(jì)量監(jiān)控系統(tǒng)，但這些系統(tǒng)普遍存在著監(jiān)控程度低、計(jì)費(fèi)精度不高、電費(fèi)均分、網(wǎng)絡(luò)程度低等諸多端。因此，對(duì)于電能計(jì)量監(jiān)控裝置的改進(jìn)變得更加緊急。本課題以高校學(xué)生公寓宿舍電能計(jì)量監(jiān)控系統(tǒng)為研究對(duì)象，設(shè)計(jì)了對(duì)學(xué)生公寓的電能數(shù)據(jù)采集器。 數(shù)據(jù)采集，又稱數(shù)據(jù)獲取，是利用一種裝置，從系統(tǒng)外部采集數(shù)據(jù)并輸入到系統(tǒng)內(nèi)部的一個(gè)接口。數(shù)據(jù)采 集技術(shù)廣泛引用在各個(gè)領(lǐng)域。比如攝像頭，麥克風(fēng)，都是數(shù)據(jù)采集工具。 被采集數(shù)據(jù)是已被轉(zhuǎn)換為電訊號(hào)的各種物理量，如溫度、水
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