flicker signal 中文意思是什麼
flicker signal
解釋
閃光信號-
The basic concepts and character values of voltage fluctuation and flicker are introduced firstly, and then the common methods of suppress the voltage fluctuation are discussed. further more, the process of extracting voltage fluctuation signal and calculating flicker values is analyzed, and the principle of detecting voltage fluctuation and flicker is detailed. by analyzing and comparing the features of the methods and devices in existence, a new digital detection method is present
論文介紹了電壓波動和閃變的基本概念、特徵量以及抑制電壓波動與閃變的常用方法，從電壓波動信號的提取和閃變值的獲得兩方面系統地闡述了電壓波動與閃變的檢測原理，分析比較了現有測量方法和裝置的特點和優劣，在此基礎上，提出了一種新的數字式微機檢測方法。 -
Employing the interlaced scanning, current tv system can compress the frequency band of tv signal effectively and facilitate transmission. but this method reduces the scanning lines of pictures and the frequency of the field. it leads the pictures displayed on tv to have such disadvantages as large area flicker, edge flicker, interlace flicker, raster visibility and creeping line etc. to satisfy people " s vision feeling better, the big - screen, multi - function and high quality tv - set have been made great progress
現行的廣播電視系統由於採用隔行掃描方式，從而有效地壓縮了電視信號的頻帶，有利於傳輸；但由於這種方式使得圖像的掃描行數少，場頻低，導致了重顯的電視圖像有大面積閃爍、邊緣閃爍、行間閃爍、行結構可見及行爬行等。 -
Current tv system has two types : one is the 60hz based system, the other is the 50hz. the phenomenon of large area flicker is not obvious in the 60hz based system, so the scanning converter uses the way of converting the 60hz and 50hz based interlaced scanning signal to 60hz based progressive scanning signal. employing this way the converter can not only reduce the large area flicker and interline twitter, but erase the raster and display finer and smoother pictures
現行的電視制式有60hz和50hz系統兩種，在60hz系統里，大面積閃爍不是很明顯，因而本掃描轉換器採用將60hz和50hz的隔行掃描信號統一處理成60hz的逐行掃描信號的方法，這樣可一方面使大面積閃爍和行間閃爍都比較輕，又可消除行結構，重現細膩圖像。 -
Based on iec standards, the methods of designing square demodulator, bandpass - weighted filter, and smoothing filter are presented. besides, the signal conditioning circuits and online statistical analysis methods of instantaneous flicker value are given. matlab simulink is also used to simulate the measuring process of voltage fluctuation and flcker
基於iec標準要求，設計了實現數字式電壓閃變測量的平方解調器、帶通加權濾波器、平滑濾波器等各環節，給出了信號調理電路和瞬時閃變值在線統計分析方法，並應用matlab系統模擬工具simulink對電壓波動和閃變測量全過程進行了數字化模擬。 -
Then the paper presents two important concepts on wavelet transform : multi - resolution analysis and wavelet package analysis. last, the paper introduces the application of wavelet transform on power quality analysis, especially on the research of voltage flicker. we can get the magnitude and frequency of the embed signal by mra
最後介紹了小波變換在電能質量分析中的應用，重點討論了電壓閃變問題，用小波多解析度分解和子帶濾波方法對電壓閃變的包絡信號進行分解，檢測出包絡信號中的各個頻率分量及其幅度。
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