基于FPGA設計的相關論文資料大全 84篇用FPGA實現FFT的研究 劉朝暉 韓月秋 摘 要 目的 針對高速數字信號處理的要求，給出了用現場可編程門陣列(FPGA)實現的 快速傅里葉變換(FFT)方案.方法 算法為按時間抽取的基4算法，采用遞歸結構的塊浮點運 算方案，蝶算過程只擴展兩個符號位以適應雷達信號處理的特點，乘法器由陣列乘法器實 現.結果 采用流水方式保證系統的速度，使取數據、計算旋轉因子、復乘、DFT等操作協 調一致，在計算、通信和存儲間取得平衡，避免了瓶頸的出現.結論 實驗表明，用FPGA 實現高速數字信號處理的算法是一個可行的方案. 關鍵詞 離散傅里葉變換； 快速傅里葉變換； 塊浮點運算； 可編程門陣列 分類號 TP39； TN957.511 Implementation of FFT with FPGA Technology Liu Zhaohui Han Yueqiu (Department of Electronics Engineering, Beijing Institute of Technology, Beijing 100081) Abstract Aim To propose a scheme for implementing FFT with FPGA in accor-dance with the requirement for high speed digital signal processing. Methods The structure of FPGA and requirement of system were considered in the experiment, radix-4 algorithm of DIT and recursive structure were adopted. The group float point arithmetic operation was used in the butterfly and the array multiplier was used to realize multiplication. Results The pipeline pattern was used to ensure the system speed, it made fetching data, calculating twiddle factor, complex multiplication and D
標簽： fpga
上傳時間： 2022-03-23
上傳用戶：
設計了農業溫濕度智能控制系統,該系統采用DHT11溫濕度傳感器作為溫濕度采集模塊,單片機選用AT89C52代替并調用Virtual terminal模擬串口通信,LCD1604液晶顯示器實時顯示溫濕度,實現了溫濕度的測量、顯示,可自動控制加熱、降溫、加濕、通風,實現溫濕度控制以及超限報警處理,并利用Proteus與Keil進行實際電路的仿真。試驗表明,該系統實現了可靠的溫濕度監控。We described the design of an intelligent control system of agriculture temperature and humidity.The system uses DHT11 temperature and humidity sensor as the temperature and humidity acquisition module.The SCM adopts AT89C52 to replace and call the virtual terminal for simulating serial communication.LCD1604 displays temperature and humidity in real time,which implements the measurement and display of temperature and humidity.The system is able to automatically control heating,cooling,humidification and ventilation,to achieve temperature and humidity control and over-limit alarm processing.The system also uses Proteus and Keil for actual circuit simulation.The experiment shows that the system is capable of reliable temperature and humidity monitoring.
上傳時間： 2022-03-26
上傳用戶：aben
本系統采用電動機電樞供電回路串接采樣電阻的方式來實現對小型直流有刷電動機的轉速測量。該系統主要由二階低通濾波電路,小信號放大電路、單片機測量顯示電路、開關穩壓電源電路等組成。同時自制電機測速裝置,用高頻磁環作為載體,用線圈繞制磁環,利用電磁感應原理檢測電機運行時的漏磁,將變化的磁場信號轉化為磁環上的感應電流。用信號處理單元電路將微弱電信號轉化為脈沖信號,送由單片機檢測,從而達到準確測量電機的速度的要求。In this system, the sampling resistance of armature power supply circuit is connected in series to measure the speed of small DC brush motor. The system is mainly composed of second-order low-pass filter circuit, small signal amplifier circuit, single-chip measurement and display circuit, switching regulated power supply circuit and so on. At the same time, the self-made motor speed measuring device uses high frequency magnetic ring as the carrier, coil winding magnetic ring, and electromagnetic induction principle to detect the leakage of magnetic field during the operation of the motor, which converts the changed magnetic field signal into the induced current on the magnetic ring. The weak electric signal is transformed into pulse signal by signal processing unit circuit, which is sent to single chip computer for detection, so as to meet the requirement of accurate measurement of motor speed.
標簽： 直流電動機
上傳時間： 2022-03-26
上傳用戶：
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：
溫度控制如今已成為當代社會研究的熱點之一,而溫度檢測在現代設備參數檢測中也是一項極其重要的技術,應用十分廣泛。與傳統的測溫方法相比,紅外測溫方法具有時間短、精度高、使用簡單方便等優點。本文以環境溫度為被測對象,設計了以STC89C52單片機為控制中心的紅外測溫裝置,能夠實現對目標溫度的實時采集、處理、顯示和報警等功能。本設計主要是由STC89C52單片機、紅外測溫傳感器、LCD1602液晶顯示器、按鍵和蜂鳴器等部分組成,采用非接觸的方式對目標溫度進行實時檢測。Temperature control has become one of the hotspots in contemporary social research,and temperature detection is an extremely important technology in modern equipment parameter detection.Compared with traditional method,the infrared temperature measuring method has advantages of short time,high precision and convenient operation,etc.This paper consider environment temperature as research objects and designs an infrared temperature measuring device which employs the STC89C52singlechipas-control center,and it can realize timely collection,processing,display and alarm function of the target temperature.The design is mainly composed of STC89C52 singlechip,infrared temperature sensor,LCD1602monitor,keys and buzzer,etc.This design detects the target temperature by non-contact method.
上傳時間： 2022-03-27
上傳用戶：jiabin
數字示波器功能強大,使用方便,但是價格相對昂貴。本文以Ti的MSP430F5529為主控器,以Altera公司的EP2C5T144C8 FPGA器件為邏輯控制部件設計數字示波器。模擬信號經程控放大、整形電路后形成方波信號送至FPGA測頻,根據頻率值選擇采用片上及片外高速AD分段采樣。FPGA控制片外AD采樣并將數據輸入到FIFO模塊中緩存,由單片機進行頻譜分析。測試表明:簡易示波器可以實現自動選檔、多采樣率采樣、高精度測頻及頻譜分析等功能。Digital oscilloscope is powerful and easy to use, but also expensive. The research group designed a low-cost digital oscilloscope, the chip of MSP430F5529 of TI is chosen as the main controller and the device of EP2C5T144C8 of Altera company is used as the logic control unit. Analog signal enter the programmable amplifier circuit, shaping circuit and other pre-processing circuit. The shaped rectangular wave signal is sent to FPGA for measure the frequency. According to the frequency value to select AD on-chip or off-chip high-speed AD for sampling. FPGA controls the off-chip AD sampling and buffers AD data by FIFO module. The single chip microcomputer receives the data, and do FFT for spectrum analysis. The test shows that the simple oscilloscope can realize automatic gain selection, sampling at different sampling rates, high precision frequency measurement and spectrum analysis.
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：
應用無跡卡爾曼濾波算法（UKF）進行鋰電池的SOC估計,采用Thevenin二階RC等效電路模型,對HPPC電池脈沖充放電實驗數據進行Matlab處理,得到較為準確的模型.通過在Matlab中編寫算法程序,對不同工況的估計值與實際值進行誤差估算及對比分析,通過此算法進行SOC估計,得到該算法可有效降低系統誤差并糾正SOC的初值偏差.The non trace Calman filter （UKF） is applied to the SOC estimation of lithium battery. The Thevenin two order RC equivalent circuit model is used to process the HPPC battery pulse charge discharge experimental data by Matlab processing, and a more accurate model is obtained. By writing algorithm program in Matlab, the error estimation and comparison analysis of the estimated value and actual value of different states are carried out, and the SOC estimation is carried out by this algorithm. The algorithm can effectively reduce the system error and correct the initial value deviation of the SOC.
標簽： 卡爾曼濾波
上傳時間： 2022-05-03
上傳用戶：默默
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：
