Identification is pervasive nowadays in daily life due to many complicated activities such as bank and library card reading, asset tracking, toll collecting, restricted access to sensitive data and procedures and target identification. This kind of task can be realized by passwords, bio- metric data such as fingerprints, barcode, optical character recognition, smart cards and radar. Radiofrequencyidentification(RFID)isatechniquetoidentifyobjectsbyusingradiosystems. It is a contactless, usually short distance, wireless data transmission and reception technique for identification of objects. An RFID system consists of two components: the tag (also called transponder) and the reader (also called interrogator).
標簽： Processing Digital Signal RFID for
上傳時間： 2020-06-08
上傳用戶：shancjb
The purpose of this book is to present detailed fundamental information on a global positioning system (GPS) receiver. Although GPS receivers are popu- larly used in every-day life, their operation principles cannot be easily found in one book. Most other types of receivers process the input signals to obtain the necessary information easily, such as in amplitude modulation (AM) and frequency modulation (FM) radios. In a GPS receiver the signal is processed to obtain the required information, which in turn is used to calculate the user position. Therefore, at least two areas of discipline, receiver technology and navigation scheme, are employed in a GPS receiver. This book covers both areas.
標簽： Fundamentals_of_Global_Positionin g_System_Receivers
上傳時間： 2020-06-09
上傳用戶：shancjb
Human Factors and Systems Interaction aims to address the main issues of concern within systems interface with a particular emphasis on the system lifecycle development and implementation of interfaces and the general implications of virtual, augmented and mixed reality with respect to human and technology interaction. Human Factors and Systems Interaction is, in the first instance, affected by the forces shaping the nature offuture computing and systems development
標簽： Interactions Advances Factors System Human and in
上傳時間： 2020-06-10
上傳用戶：shancjb
設計高速電路必須考慮高速訊 號所引發的電磁干擾、阻抗匹配及串音等效應，所以訊號完整性 (signal integrity)將是考量設計電路優劣的一項重要指標，電路日異複雜必須仰賴可 靠的軟體來幫忙分析這些複雜的效應，才比較可能獲得高品質且可靠的設計， 因此熟悉軟體的使用也將是重要的研究項目之一。另外了解高速訊號所引發之 各種效應(反射、振鈴、干擾、地彈及串音等)及其克服方法也是研究高速電路 設計的重點之一。目前高速示波器的功能越來越多，使用上很複雜，必須事先 進修學習，否則無法全盤了解儀器之功能，因而無法有效發揮儀器的量測功能。 其次就是高速訊號量測與介面的一些測試規範也必須熟悉，像眼圖分析，探針 效應，抖動(jitter)測量規範及高速串列介面量測規範等實務技術，必須充分 了解研究學習，進而才可設計出優良之教學教材及教具。
標簽： 高速電路
上傳時間： 2021-11-02
上傳用戶：jiabin
基于TMS320F2812 光伏并網發電模擬裝置PROTEL設計原理圖+PCB+軟件源碼+WORD論文文檔,硬件采用2層板設計，PROTEL99SE 設計的工程文件，包括完整的原理圖和PCB文件，可以做為你的學習設計參考。 摘要：本文實現了一個基于TMS320F2812 DSP芯片的光伏并網發電模擬裝置，采用直流穩壓源和滑動變阻器來模擬光伏電池。通過TMS320F2812 DSP芯片ADC模塊實時采樣模擬電網電壓的正弦參考信號、光伏電池輸出電壓、負載電壓電流反饋信號等。經過數據處理后，用PWM模塊產生實時的SPWM 波，控制MOSFET逆變全橋輸出正弦波。本文用PI控制算法實現了輸出信號對給定模擬電網電壓的正弦參考信號的頻率和相位跟蹤，用恒定電壓法實現了光伏電池最大功率點跟蹤（MPPT），從而達到模擬并網的效果。另外本裝置還實現了光伏電池輸出欠壓、負載過流保護功能以及光伏電池輸出欠壓、過流保護自恢復功能、聲光報警功能、孤島效應的檢測、保護與自恢復功能。系統測試結果表明本設計完全滿定設計要求。關鍵詞：光伏并網，MPPT，DSP Photovoltaic Grid-connected generation simulator Zhangyuxin，Tantiancheng，Xiewuyang(College of Electrical Engineering, Chongqing University)Abstract: This paper presents a photovoltaic grid-connected generation simulator which is based on TMS320F2812 DSP, with a DC voltage source and a variable resistor to simulate the characteristic of photovoltaic cells. We use the internal AD converter to real-time sampling the referenced grid voltage signal, outputting voltage of photovoltaic, feedback outputting voltage and current signal. The PWM module generates SVPWM according to the calculation of the real-time sampling data, to control the full MOSFET inverter bridge output sine wave. We realized that the output voltage of the simulator can track the frequency and phase of the referenced grid voltage with PI regulation, and the maximum photovoltaic power tracking with constant voltage regulation, thereby achieved the purpose of grid-connected simulation. Additionally, this device has the over-voltage and over-current protection, audible and visual alarm, islanding detecting and protection, and it can recover automatically. The testing shows that our design is feasible.Keywords: Photovoltaic Grid-connected，MPPT，DSP 目錄引言 11. 方案論證 11.1. 總體介紹 11.2. 光伏電池模擬裝置 11.3. DC-AC逆變橋 11.4. MOSFET驅動電路方案 21.5. 逆變電路的變頻控制方案 22. 理論分析與計算 22.1. SPWM產生 22.1.1. 規則采樣法 22.1.2. SPWM 脈沖的計算公式 32.1.3. SPWM 脈沖計算公式中的參數計算 32.1.4. TMS320F2812 DSP控制器的事件管理單元 42.1.5. 軟件設計方法 62.2. MPPT的控制方法與參數計算 72.3. 同頻、同相的控制方法和參數計算 8
標簽： tms320f2812 光伏 并網發電 模擬 protel pcb
上傳時間： 2021-11-02
上傳用戶：
科學家與工程師數字信號處理指南The Scientist and Engineer Guide to Digital Signal Processing.pdf
標簽： 數字信號處理
上傳時間： 2021-11-11
上傳用戶：
ABSTRACTThe flyback power stage is a popular choice for single and multiple output dc-to-dc converters at powerlevels of 150 Watts or less. Without the output inductor required in buck derived topologies, such as theforward or push-pull converter, the component count and cost are reduced. This application note will reviewthe design procedure for the power stage and control electronics of a flyback converter. In these isolatedconverters, the error signal from the secondary still needs to cross the isolation boundary to achieveregulation. By using the UC3965 Precision Reference with Low Offset Error Amplifier on the secondaryside to drive an optocoupler and the UCC3809 Economy Primary Side Controller on the primary side, asimple and low cost 50 Watt isolated power supply is realized.
標簽： 隔離
上傳時間： 2021-11-24
上傳用戶：kingwide
進入21世紀之后，數字化浪潮正在席卷全球，數字信號處理器DSP（Digital Signal Processor）正是這場數字化革命的核心，無論在其應用的廣度還是深度方面，都在以前所未有的速度向前發展。本章主要對數字信號處理進行簡要介紹。 首先對數字信號處理進行了概述，介紹了DSP的基本知識；接著介紹了可編程DSP芯片，對DSP芯片的發展、特點、分類、應用和發展趨勢作了論述；然后介紹DSP系統，對DSP系統的構成、特點、設計過程以及芯片的選擇進行了詳細的介紹；最后對DSP產品作了簡要介紹。
標簽： dsp
上傳時間： 2022-01-23
上傳用戶：
Precision, Low Noise, CMOS, Rail-to-Rail, Input/Output Operational Amplifiers Data Sheet AD8605/AD8606/AD8608The AD8605, AD8606, and AD86081 are single, dual, and quad rail-to-rail input and output, single-supply amplifiers. They feature very low offset voltage, low input voltage and current noise, and wide signal bandwidth. They use the Analog Devices, Inc. patented DigiTrim? trimming technique, which achieves
標簽： 運算放大器
上傳時間： 2022-02-02
上傳用戶：
verilog實現I2C通信的slave模塊源碼狀態機設位計可做I2C接口的仿真模型//`timescale 1ns/1psmodule I2C_slv (input [6:0] slv_id,input RESET,input scl_i, //I2C clkinput sda_i, //I2C data ininput [7:0] I2C_RDDATA,////////////////////////output reg sda_o, //I2C data outoutput reg reg_w, //reg write enable pulse (1T of scl_i)output reg [7:0] I2C_ADDR,output reg [7:0] I2C_DATA); parameter ST_ADDR = 4'd0; parameter ST_ACK = 4'd1; parameter ST_WDATA1 = 4'd2; parameter ST_WACK1 = 4'd3; parameter ST_WDATA2 = 4'd4; parameter ST_WACK2 = 4'd5; parameter ST_WDATA3 = 4'd6; parameter ST_WACK3 = 4'd7; parameter ST_RDATA1 = 4'd8; parameter ST_RACK1 = 4'd9; parameter ST_IDLE = 4'd15;//---------------------------------------------------------------------------// Signal Declaration//--------------------------------------------------------------------------- reg i2c_start_n, i2c_stop_n; //wire RESET_scl; wire i2c_stp_n, i2c_RESET; reg [3:0] i2c_cs, i2c_ns; reg [3:0] cnt_bit; reg [7:0] d_vec; reg i2c_rd, i2c_ack; reg [7:0] I2C_RDDATA_latch;
上傳時間： 2022-02-03
上傳用戶：
