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隨著光伏發電系統快速發展,以及電動汽車充電樁的普及,傳統的剩余電流保護器無法滿足實際需求。介紹了一款B型剩余電流保護器,采用磁調制剩余電流互感器和零序電流互感器采集剩余電流。根據GB/T 22794—2017標準要求,可識別1 kHz及以下的正弦交流、帶和不帶直流分量的脈動直流、平滑直流等剩余電流信號。經信號調理電路將電壓信號送到單片機進行采集和判斷。通過試驗測試,該樣機在測試精度和速度上均符合國家標準的相關要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
標簽： 電流保護器
上傳時間： 2022-03-27
上傳用戶：
目的:自主研制一款超聲手術刀電源控制系統,以減少能量的消耗,維持手術刀的正常溫度。方法:對超聲換能器在諧振附近的等效電路建立模型,并設計基于數字信號處理(DSP)的超聲手術刀的硬件控制系統。結果:經對電源控制系統的電路和工作性能測試,生成的電流和電壓的有效值等參數,能夠及時調整電源的頻率,并達到預期的功能指標,使超聲手術刀工作在諧振狀態。結論:以DSP為核心設計的超聲手術刀電源控制系統,測試指標均能夠達到預期的要求,能夠使系統在諧振狀態下工作。Objective: To independently develop a power control system of ultrasonic scalpel so as to reduce the energy consumption and maintain the normal temperature of ultrasonic scalpel. Methods: In this paper, the model of equivalent circuit of ultrasonic transducer nearby syntony was built up, and the hardware control system of ultrasonic scalpel based on digital signal processing(DSP) was designed. Results: Through testing the circuit and work performance of power control system, the series of parameters such as effective value and so on which were produced by this system could adjust frequency of power source in time and attain anticipative functional indicator, and it took the ultrasonic scalpel to work in syntonic situation. Conclusion: The tested indicators of power control system of ultrasonic scalpel based on the kernel design of DSP can attain anticipative requirement, and can take this system to work in syntonic situation.
上傳時間： 2022-04-03
上傳用戶：bluedrops
Digital Signal Processing in Python基于python的數字信號處理原版，對于dsp算法的快速原型驗證非常有幫助。
上傳時間： 2022-04-28
上傳用戶：
Allen的Think系列，講述數字信號處理器（DSP）基本概念，用Python語言描述這些概念。可實際運行代碼，更深的理解DSP。
上傳時間： 2022-05-14
上傳用戶：
萊昂斯《數字信號處理（第三版）（英文版）》在Richard G. Lyons所著Understanding Digital Signal Processing, Second Edition的基礎上進行了改編，針對通信類學校本科教學大綱，刪除了教學中一般不涉及的內容，調整了章節順序，并增加了z反變換、濾波器結構、線性相位FIR濾波器和其結構、模擬濾波器簡介的內容，使教內容材更加完整。全書在概述了離散序列和系統的定義和實例之后，詳細討論了離散系統的特性、信號的離散化和離散卷積、z變換、離散時間傅里葉變換和離散傅里葉變換、快速傅里葉變換、數字濾波器結構、以及有限和無限脈沖響應數字濾波器的設計等基本概念和基本理論。書中涉及的數學知識以簡明形式給出，深入淺出，易于理解。本書每章都增加了例題、習題和MATLAB例題，以便加強對每章內容的理解和掌握。 書中通過具有啟發性的解釋和精心挑選的例子，采用易于理解的數學表示方法，循序漸進地對數字信號處理技術加以說明和解釋，幫助讀者從整體掌握DSP基礎，并逐步掌握較高層次的DSP概念和應用。本書特點：包含大量實際直觀的例子；強調實際的、日常的DSP應用和解決方案·提供了全新的正交信號處理內容，包括易于理解的三維空間圖；包括即使是經驗豐富的專業人士也可能忽略的技術方法；涵蓋頻率采樣、內插式FER、CIC等重要濾波器；提供流行的數字信號處理技巧。
標簽： 數字信號處理
上傳時間： 2022-05-22
上傳用戶：
《Matlab 工具箱應用指南信息工程篇》是由電子工業出版社出版的一部教育作品，作者是伯曉晨。本書共分7章，系統介紹Matlab中與信息工程聯系緊密的7個工具箱的使用方法，包括信號處理工具箱（Signal Processing Toolbox）、圖像處理工具箱（Image Processing Toolbox）、通信工具箱（Communication Toolbox）、定點運算工具箱（Fixed－Point Blockset）、小波分析工具箱（Waelet Toolbox）、高階譜分析工具
上傳時間： 2022-07-08
上傳用戶：
Medical signal digital processing technique
標簽： processing technique Medical digital
上傳時間： 2015-05-01
上傳用戶：bruce5996
Wavelets have widely been used in many signal and image processing applications. In this paper, a new serial-parallel architecture for wavelet-based image compression is introduced. It is based on a 4-tap wavelet transform, which is realised using some FIFO memory modules implementing a pixel-level pipeline architecture to compress and decompress images. The real filter calculation over 4 · 4 window blocks is done using a tree of carry save adders to ensure the high speed processing required for many applications. The details of implementing both compressor and decompressor sub-systems are given. The primarily analysis reveals that the proposed architecture, implemented using current VLSI technologies, can process a video stream in real time.
標簽： applications processing Wavelets widely
上傳時間： 2014-01-22
上傳用戶：hongmo
processing the signal which is chirp
標簽： processing signal chirp which
上傳時間： 2014-12-07
上傳用戶：haoxiyizhong
wavelets are used extensively in signal and image processing,Medicine, Finance, Radar, Sonar, Geology and many other varied fields. They are usually presented in mathematical formulae, but can actually be understood in terms of simple comparisons with your data.
標簽： extensively processing wavelets Medicine
上傳時間： 2015-10-22
上傳用戶：ecooo
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