point sampling theory 中文意思是什麼
point sampling theory
解釋
點抽樣理論-
Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method
在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。 -
We expatiate on the theory of ccd from the physical base and point out the different theory of ccd engendering noise. we describe the mathematic model of ccd output noise by correlation theory and analyze the noise quantificationally, it gives the correlation conditions. at these bases, we discuss the correlated double sampling elaborately
課題從ccd的物理基礎入手，闡述了ccd的工作機理，對ccd的各種不同噪聲進行了深入分析，指出了ccd不同噪聲產生的原理，課題運用相關理論對浮置擴散放大器讀出方式工作的ccd輸出復位噪聲進行了數學描述，進而對復位噪聲的相關性進行了定量的分析和計算，給出了復位噪聲相關的條件。
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