noise signal generator 中文意思是什麼
noise signal generator
解釋
噪聲信號發生器-
This thesis studies the law of affecting de - noise result and the selection of the threshold and the wavelet function, the combination of wavelet and fft in the fault diagnosis of turbine - generator sets : by the de - noise anslysis of blocks and sin signals, concludes : to blocks signals, usually adopts soft threshold ; the law of affecting de - noise result is when use wavelet auto - de - noise, with the increasing of decomposed level, the de - noise result becomes worse while the level blow the 3, when the level above 3 and when uses wavelet packet, it is the other way round ; the best de - noise methods of the signal is that uses " dbl " wavelet function, three level, soft and " rigrsure " threshold
本文研究了分解層數對消噪結果影響的規律和閾值、小波函數的選取，結合小波分析與fft分析診斷汽輪發電機組的故障。通過對brocks和sin兩信號的分析，得出：對blocks信號進行分析一般採用軟閾值；分解層數對消噪結果影響的規律為用小波自動降噪在分解層數小於3時，隨著分解層數的增加，消噪結果變好，反之，則變差，用小波包降噪時隨著分解層數的增加，消噪效果變好；適宜選用dbl小波軟rigrsure閾值自動消噪。 -
In order to improve the quality of the voltage signals, this paper has adopted the scheme of three phases and six organs in signal - generator part, which can eliminate the errors caused by the assembly warp and the zero shift of organs. this paper also has analyzed the distribution and varying rules of the magnetic field in the signal - generator part, then based on the conclusion of the analysis improved the structure of signal - generator, which could completely eliminate the noise signal caused by the roughness of the face on the magnetic steel ring. the improvement not only met the requirement of this study, but established the theory foundation for the super - high precision magnetic encoder in future research
因此，為提高原始電壓信號的質量，本文採用三相六元件的信號發生方案，通過差分處理濾除了由於裝配偏差和零點漂移帶來的信號誤差;本文對編碼器信號發生結構進行了磁場分析，依據磁場分析的結論對編碼器常用的信號發生結構進行了改進，改進后的結構利用積分原理在理論上能夠完全消除信號中由磁鋼環表面粗糙度引起的信號噪聲，進一步提高了信號質量，此結構不僅滿足了本課題的需要，而且為今後研製超高精度的磁電式編碼器奠定了理論基礎。 -
This thesis researches the design and implementation of underwater high - speed multi - channel data acquisition and processing system. there are some contents to be presented including designing a set of noise signal generator ; design and implementation of underwater nosie high - speed multi - channel data acquisition and processing system ; programming the windows 2000 device driver cl pci and usb with ddk2000 ; programming user interface of the control of the acquisition and display of the image with vc + + 6. 0
本論文對高速多通道採集和處理系統的設計和實現進行了研究，論文的主要研究工作包括：設計一套模擬噪聲源；根據水下目標輻射噪聲的檢測和識別要求進行了高速多通道採集和處理系統的設計和實現研究；完成了相應的pci 、 usbwindows2000驅動程序的開發；使用vc + + 6 . 0編寫了採集控制和波形顯示界面。
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