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abnormal

// chebysheve outlier detection // this function is used to detect the abnormal value among a set o

// chebysheve outlier detection // this function is used to detect the abnormal value among a set of data // input: // delta: a set of data // flag: discribe which data is already known as outlier // p: restrict level // output: // double[] door : byyond which the data may be considered as a outlier // door[0]: the upperdoor // door[1]: the lowerdoor

標簽： chebysheve detection abnormal function

上傳時間： 2013-11-30

上傳用戶：13517191407
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(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
基于單片機的汽車多功能報警系統(tǒng)設(shè)計

基于單片機的汽車多功能報警系統(tǒng)設(shè)計The Design of Automobile Multi-function AlarmingBased on Single Chip Computer劉法治趙明富寧睡達(河南科技學院，新鄉(xiāng) 453 00 3)摘要介紹了一種基于單片機控制的汽車多功能報警系統(tǒng)，它能對汽車的潤滑系統(tǒng)油壓、制動系統(tǒng)氣壓、冷卻系統(tǒng)溫度、輪胎欠壓及防盜進行自動檢測，并在發(fā)現(xiàn)異常情況時，發(fā)出聲光報警。闡述了該報警系統(tǒng)的硬件組成及軟件設(shè)計方法。關(guān)鍵詞單片機傳感器數(shù)模轉(zhuǎn)換報警Abstract Am ulti-fimctiona utomobilea larnungs ystemb asedo ns inglec hipc omputerco ntorlis in torducedin th isp aper.Th eo ilpr essuero flu bricatesystem, air pressure of braking system, temperature of cooling system, under pressure of tyre and guard against theft， detected automaticaly場thesystem. Audio and visual alarms wil be provided under abnormal conditions廠The hardware composition and software design of the system， described.Keywords Singlec hipc omputer Sensor Digital-t-oanaloguec onversion Alarmin 汽車多功能報苦器硬件系統(tǒng)設(shè)計根據(jù) 系統(tǒng) 實際需要和產(chǎn)品性價比，選用ATMEL公司新生產(chǎn)的采用CMOs工藝的低功耗、高性能8位單片機AT89S52作為系統(tǒng)的控制器。AT89S52的片內(nèi)有8k Bytes LSP Flash閃爍存儲器，可進行100(〕次寫、擦除操作;256Bytes內(nèi)部數(shù)據(jù)存儲器(RAM);3 2 根可編程輸N輸出線;2個可編程全雙工串行通道;看門狗(WTD)電路等。系統(tǒng)由傳感器、單片機、模數(shù)轉(zhuǎn)換器、無線信號發(fā)射電路、指示燈驅(qū)動電路、聲光報警驅(qū)動電KD一9563，發(fā)出三聲二閃光。并觸發(fā)一個高電平，驅(qū)動無線信號發(fā)射電路。

標簽： 單片機汽車多功能報警

上傳時間： 2013-11-09

上傳用戶：gxmm
單片機系統(tǒng)“PC”失控的軟件措施

單片機系統(tǒng)“PC”失控的軟件措施Software Measure of GettingO uto fC ontrolfo r“PC"in S ingleC hipC omputerS ystem謐加春王曉基雷小華(江西理工大學機電工程學院，贛州 34 10 00)摘要單片機系統(tǒng)在實際工業(yè)現(xiàn)場中可能遇到各種干擾和自身的隨機性故障。現(xiàn)場惡劣的環(huán)境有可能使計算機系統(tǒng)發(fā)生異常，計算機程序指針“PC”失控就是常見的故障之一，如果發(fā)生“PC”失控，將導(dǎo)致CPI工作混亂，釀成嚴重的事故。研究了“PC”失控的原因，并指出軟件抗干擾的幾種方法，有效保證單片機系統(tǒng)的正常工作。關(guān)鍵詞單片機“PC”失控抗干擾Abstract Inp racticalin dustrialfi elds,th ereis v ariousin terferencea fectingo perationo fsi nglec hipc omputersy stemsa ndt hec omputersy stems。fac噸random faults飾themselves. It is very common that the severe environment makes the computer systems abnormal. The program counter "PC"gettingo utof co ntorlis on eo fth ec ommonfa ults.If th isoc curs,C PUw ouldb eru nningo utof or deran din torducesse riousan cient.T hec ausesof " PC"geting out of control， studied in this paper and some countermeasures of anti-interference師software are given to ensure single chip computer systemworking properly.Keywords Single。飾computer Porgramc ounter"P C" Anti-interfeernc 在設(shè) 計和開發(fā)單片機系統(tǒng)時，一般難以周全地預(yù)計單片機系統(tǒng)在實際工業(yè)現(xiàn)場中可能遇到的各種干擾和自身的隨機性故障。因此，除了采取防止和抑制干擾的各項措施外，還應(yīng)該借助于軟件措施克服某些干擾，系統(tǒng)還應(yīng)具備迅速自行恢復(fù)的能力。本文介紹的應(yīng)對單片機系統(tǒng)PC失控的軟件措施，設(shè)計靈活，節(jié)省硬件資源，能保證測控系統(tǒng)長期可靠地運行。MC S- 5 1單片機以其優(yōu)良的性能價格比大量應(yīng)用于工業(yè)現(xiàn)場測試和控制領(lǐng)域。但是，現(xiàn)場惡劣的環(huán)境有可能使計算機系統(tǒng)發(fā)生異常，計算機程序指針PC失控就是常見的故障之一，一旦發(fā)生PC“走飛”，計算機系統(tǒng)就會出現(xiàn)工作混亂，釀成嚴重的事故。為了在 CP 失控時盡量減少由此帶來的不利影響，并盡快使系統(tǒng)恢復(fù)正常，需要采取一定的軟件措施和硬件措施。常見的硬件措施有“看門狗”電路。軟件措施設(shè)置的前提條件是:①在干擾作用下，微機系統(tǒng)硬件部分不會受到任何損壞，或者損壞部分設(shè)置有監(jiān)測狀態(tài)可供查詢;②程序區(qū)不會受到干擾侵害。單片機系統(tǒng)的程序和表格以及重要的參數(shù)均設(shè)置在ROM區(qū)，不會因干擾的侵人而改變;③ RAM區(qū)中的重要數(shù)據(jù)不會被破壞，或者雖然被破壞，但是可以重新建立。

標簽： 單片機系統(tǒng) 軟件

上傳時間： 2013-11-02

上傳用戶：bhqrd30
The frequency domain plays an important role in image processing to smooth, enhance, and detect edg

The frequency domain plays an important role in image processing to smooth, enhance, and detect edges of images. Although image data typically does not include imaginary values, the fast Fourier transform (FFT) has been used for obtaining spectra. In this paper, the fast Hartley transform (FHT) is used to transform two-dimensional image data. Because the Hartley transform is real valued, it does not require complex operations. Both spectra and autocorrelations of two-dimensional ultrasound images of normal and abnormal livers were computed.

標簽： processing frequency important enhance

上傳時間： 2014-01-08

上傳用戶：1051290259
Transmission+Line+Protection

Modern power systems involve large amount of investment. An electric power system comprises of generation, transmission, and distribution of electric energy. Growth of power systems has led to very complex networks extended across large areas. In such situations, the proper functioning of a modern power system is heavily dependent upon the healthy operation of the transmission lines within it. Transmission lines are used to transmit a huge amount of power over a long distance. But as these lines are located in the open atmosphere, they are highly affected by different types of abnormal conditions or faults.

標簽： Transmission Protection Line

上傳時間： 2020-06-07

上傳用戶：shancjb

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abnormal

// chebysheve outlier detection // this function is used to detect the abnormal value among a set o

基于C8051F930的管道溫度壓力遠程監(jiān)測系統(tǒng)

基于單片機的汽車多功能報警系統(tǒng)設(shè)計

單片機系統(tǒng)“PC”失控的軟件措施

The frequency domain plays an important role in image processing to smooth, enhance, and detect edg

Transmission+Line+Protection