隨著光伏發(fā)電系統(tǒng)快速發(fā)展,以及電動(dòng)汽車充電樁的普及,傳統(tǒng)的剩余電流保護(hù)器無法滿足實(shí)際需求。介紹了一款B型剩余電流保護(hù)器,采用磁調(diào)制剩余電流互感器和零序電流互感器采集剩余電流。根據(jù)GB/T 22794—2017標(biāo)準(zhǔn)要求,可識(shí)別1 kHz及以下的正弦交流、帶和不帶直流分量的脈動(dòng)直流、平滑直流等剩余電流信號。經(jīng)信號調(diào)理電路將電壓信號送到單片機(jī)進(jìn)行采集和判斷。通過試驗(yàn)測試,該樣機(jī)在測試精度和速度上均符合國家標(biāo)準(zhǔn)的相關(guān)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(biāo)簽： 電流保護(hù)器
上傳時(shí)間： 2022-03-27
上傳用戶：
目的:自主研制一款超聲手術(shù)刀電源控制系統(tǒng),以減少能量的消耗,維持手術(shù)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(shè)計(jì)基于數(shù)字信號處理(DSP)的超聲手術(shù)刀的硬件控制系統(tǒng)。結(jié)果:經(jīng)對電源控制系統(tǒng)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(shù),能夠及時(shí)調(diào)整電源的頻率,并達(dá)到預(yù)期的功能指標(biāo),使超聲手術(shù)刀工作在諧振狀態(tài)。結(jié)論:以DSP為核心設(shè)計(jì)的超聲手術(shù)刀電源控制系統(tǒng),測試指標(biāo)均能夠達(dá)到預(yù)期的要求,能夠使系統(tǒng)在諧振狀態(tài)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.
標(biāo)簽： 數(shù)字信號處理 超聲手術(shù)刀 電源控制
上傳時(shí)間： 2022-04-03
上傳用戶：bluedrops
Digital Signal Processing in Python基于python的數(shù)字信號處理原版，對于dsp算法的快速原型驗(yàn)證非常有幫助。
上傳時(shí)間： 2022-04-28
上傳用戶：
Allen的Think系列，講述數(shù)字信號處理器（DSP）基本概念，用Python語言描述這些概念。可實(shí)際運(yùn)行代碼，更深的理解DSP。
上傳時(shí)間： 2022-05-14
上傳用戶：
萊昂斯《數(shù)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(chǔ)上進(jìn)行了改編，針對通信類學(xué)校本科教學(xué)大綱，刪除了教學(xué)中一般不涉及的內(nèi)容，調(diào)整了章節(jié)順序，并增加了z反變換、濾波器結(jié)構(gòu)、線性相位FIR濾波器和其結(jié)構(gòu)、模擬濾波器簡介的內(nèi)容，使教內(nèi)容材更加完整。全書在概述了離散序列和系統(tǒng)的定義和實(shí)例之后，詳細(xì)討論了離散系統(tǒng)的特性、信號的離散化和離散卷積、z變換、離散時(shí)間傅里葉變換和離散傅里葉變換、快速傅里葉變換、數(shù)字濾波器結(jié)構(gòu)、以及有限和無限脈沖響應(yīng)數(shù)字濾波器的設(shè)計(jì)等基本概念和基本理論。書中涉及的數(shù)學(xué)知識(shí)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(xí)題和MATLAB例題，以便加強(qiáng)對每章內(nèi)容的理解和掌握。 書中通過具有啟發(fā)性的解釋和精心挑選的例子，采用易于理解的數(shù)學(xué)表示方法，循序漸進(jìn)地對數(shù)字信號處理技術(shù)加以說明和解釋，幫助讀者從整體掌握DSP基礎(chǔ)，并逐步掌握較高層次的DSP概念和應(yīng)用。本書特點(diǎn)：包含大量實(shí)際直觀的例子；強(qiáng)調(diào)實(shí)際的、日常的DSP應(yīng)用和解決方案·提供了全新的正交信號處理內(nèi)容，包括易于理解的三維空間圖；包括即使是經(jīng)驗(yàn)豐富的專業(yè)人士也可能忽略的技術(shù)方法；涵蓋頻率采樣、內(nèi)插式FER、CIC等重要濾波器；提供流行的數(shù)字信號處理技巧。
標(biāo)簽： 數(shù)字信號處理
上傳時(shí)間： 2022-05-22
上傳用戶：
《Matlab 工具箱應(yīng)用指南信息工程篇》是由電子工業(yè)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(tǒng)介紹Matlab中與信息工程聯(lián)系緊密的7個(gè)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(diǎn)運(yùn)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(shí)間： 2022-07-08
上傳用戶：
Medical signal digital processing technique
標(biāo)簽： processing technique Medical digital
上傳時(shí)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(biāo)簽： applications processing Wavelets widely
上傳時(shí)間： 2014-01-22
上傳用戶：hongmo
processing the signal which is chirp
標(biāo)簽： processing signal chirp which
上傳時(shí)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(biāo)簽： extensively processing wavelets Medicine
上傳時(shí)間： 2015-10-22
上傳用戶：ecooo
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1
