目前電動(dòng)汽車主要以鋰電池作為動(dòng)力來(lái)源,為了提高鋰電池的使用時(shí)間和安全性,為鋰電池提供安全良好的運(yùn)行環(huán)境,電池管理系統(tǒng)應(yīng)運(yùn)而生。BMS主控單元基于S32K144汽車級(jí)單片機(jī),通過(guò)主從式網(wǎng)絡(luò)控制結(jié)構(gòu)能夠?qū)︿囯姵氐母鱾€(gè)參數(shù)進(jìn)行采集與分析。采用擴(kuò)展卡爾曼濾波對(duì)電池的荷電狀態(tài)(SOC)進(jìn)行估算,克服普通估算方法無(wú)法避免電池內(nèi)阻誤差的缺點(diǎn),通過(guò)Matlab/Simulink軟件仿真驗(yàn)證可使估算誤差達(dá)到2%以內(nèi)。At present,electric vehicles mainly use lithium batteries as the power source.In order to improve the running time and safety of lithium batteries,a safe and good operating environment for power batteries is provided,and a battery management system(BMS) has emerged.The BMS main control unit is based on the S32K144 automotive-grade control chip.Through the master-slave network control structure,it can collect and analyze the various parameters of the lithium battery.The Extended Kalman Filter(EKF) is used to estimate the state of charge(SOC) of the battery,which overcomes the shortcomings of the internal estimation method that cannot overcome the internal resistance error of the battery.It can be verified by Matlab/Simulink software simulation.The estimation error is within 2%.
上傳時(shí)間： 2022-03-26
上傳用戶：XuVshu
本系統(tǒng)采用電動(dòng)機(jī)電樞供電回路串接采樣電阻的方式來(lái)實(shí)現(xiàn)對(duì)小型直流有刷電動(dòng)機(jī)的轉(zhuǎn)速測(cè)量。該系統(tǒng)主要由二階低通濾波電路,小信號(hào)放大電路、單片機(jī)測(cè)量顯示電路、開(kāi)關(guān)穩(wěn)壓電源電路等組成。同時(shí)自制電機(jī)測(cè)速裝置,用高頻磁環(huán)作為載體,用線圈繞制磁環(huán),利用電磁感應(yīng)原理檢測(cè)電機(jī)運(yùn)行時(shí)的漏磁,將變化的磁場(chǎng)信號(hào)轉(zhuǎn)化為磁環(huán)上的感應(yīng)電流。用信號(hào)處理單元電路將微弱電信號(hào)轉(zhuǎn)化為脈沖信號(hào),送由單片機(jī)檢測(cè),從而達(dá)到準(zhǔn)確測(cè)量電機(jī)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(biāo)簽： 直流電動(dòng)機(jī)
上傳時(shí)間： 2022-03-26
上傳用戶：
數(shù)字示波器功能強(qiáng)大,使用方便,但是價(jià)格相對(duì)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(shè)計(jì)數(shù)字示波器。模擬信號(hào)經(jīng)程控放大、整形電路后形成方波信號(hào)送至FPGA測(cè)頻,根據(jù)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(shù)據(jù)輸入到FIFO模塊中緩存,由單片機(jī)進(jìn)行頻譜分析。測(cè)試表明:簡(jiǎn)易示波器可以實(shí)現(xiàn)自動(dòng)選檔、多采樣率采樣、高精度測(cè)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.
標(biāo)簽： msp430 單片機(jī) fpga 數(shù)字示波器
上傳時(shí)間： 2022-03-27
上傳用戶：
LED 線陣顯示裝置, 分為 LED 線性旋轉(zhuǎn)顯示主機(jī)和圖文錄入器兩部分。主機(jī)用直流電機(jī)帶動(dòng)由紅綠 LED 組成的線陣旋轉(zhuǎn), 同時(shí)線陣按照時(shí)序依次切換顯示狀態(tài), 在固定區(qū)域利用視覺(jué)暫留效果形成 16×16 點(diǎn)陣, 用以顯示圖文;圖文錄入器用 HMI 觸控屏作為人機(jī)交互界面, 實(shí)現(xiàn)圖文錄入和回放功能。主機(jī)與圖文錄入器通過(guò)無(wú)線通信方式進(jìn)行信息交互,可由圖文錄入器控制主機(jī)切換不同工作任務(wù), 以及改變線陣顯示內(nèi)容。The LED linear array display device is divided into two parts:the one is the main unit used to display content,and the other one is used to input the contents.The main unit is driven by a DC motor to rotate the linear array composed by red and green light emitting diodes.At the same time,the 16×16 dot matrix that switching the display state according to the time sequence on the main unit displays pictures and texts in the fixed area,by using the visual temporary effect.The HMI touch screen is used as human machine interface to realize the function that input and playback pictures and texts.The two parts of the device communicate with each other through wireless communication.The image and text input controller can control the main unit to switch different tasks and change the content of linear array displayed.
標(biāo)簽： stc12c5a60s2 單片機(jī) led
上傳時(shí)間： 2022-03-28
上傳用戶：jiabin
為了確保最佳性能，請(qǐng)仔細(xì)閱讀本手冊(cè)。請(qǐng)將其保存在安全的地方，以備將來(lái)參考。將本機(jī)安裝在陰涼，干燥，清潔的地方-遠(yuǎn)離窗戶的熱源，過(guò)多的振動(dòng)灰塵，濕氣和冷源。避免嗡嗡聲的變壓器，電動(dòng)機(jī)。為避免起火或電擊，請(qǐng)勿使本機(jī)遭受雨淋或浸水。絕對(duì)不要機(jī)柜。如果有東西掉入設(shè)備中，請(qǐng)與經(jīng)銷商聯(lián)系。不要在開(kāi)關(guān)，控件或連接線上用力。移動(dòng)設(shè)備時(shí)，請(qǐng)先拔下電源插頭和與其他設(shè)備相連的電線。切勿自己拉電線。機(jī)柜上的開(kāi)口可確保設(shè)備正常通風(fēng)。如果這些開(kāi)口被阻塞，則機(jī)柜內(nèi)部的溫度將迅速升高。因此，請(qǐng)避免將物品放在這些開(kāi)口處，并將其安裝在后方10厘米，兩側(cè)20厘米，深30厘米9通風(fēng)條件確保設(shè)備的頂部面板至少留出一定空間。否則不僅會(huì)損壞設(shè)備，還會(huì)引起火災(zāi)。To assure the finest performance, please read this manual carefully. Keep it in a safe place for future reference Install this unit in a cool, dry, clean place -away from windows heat sources, sources of excessive vibration dust, moisture and cold. Avoid sources of humming transformers, motors). To prevent fire or electrical shock do not expose the unit to rain or water.
上傳時(shí)間： 2022-04-02
上傳用戶：
電學(xué)中的測(cè)量技術(shù)涉及范圍非常廣,電流測(cè)量在電學(xué)計(jì)量中占有非常重要的位置。如何精確地進(jìn)行電流測(cè)量是精密測(cè)量的一大難題。傳統(tǒng)的電流檢測(cè)電路多采用運(yùn)算放大芯片與片外電流檢測(cè)電路相結(jié)合的方式,電路集成度很低,需要較多的接口和資源才能完成對(duì)電路的檢測(cè)。本文把所有電路部分都集成在一塊芯片上,包括檢測(cè)電阻,運(yùn)算放大器電路及模擬轉(zhuǎn)數(shù)字轉(zhuǎn)換電路,從而在電路內(nèi)部可以進(jìn)行電流檢測(cè),使電路更好的集成化。前置電路使用二級(jí)共源共柵結(jié)構(gòu)的運(yùn)算放大器,減小溝道長(zhǎng)度調(diào)制效應(yīng)造成的電流誤差。10位SAR ADC中采用電容驅(qū)動(dòng)能力強(qiáng)的傳輸門保證了模數(shù)轉(zhuǎn)化器的有效精度。比較器模塊采用再生鎖存器與遲滯比較器作為基礎(chǔ)單元組合解決精密測(cè)量的問(wèn)題。本設(shè)計(jì)可以作為嵌入芯片內(nèi)的一小部分而檢測(cè)芯片中的微小電流1mA~100mA,工作電壓在1.8v左右,電流檢測(cè)精度預(yù)期達(dá)到10uA的需求。The measurement technology in electricity involves a wide range,and current measurement plays a very important position in electrical measurement.How to accurately measure current is a big problem in precision measurement. The traditional current detecting circuit adopts the combination of the operational amplifier chip and theoff-chip current detecting circuit, The circuit integration is very low, and more interfaces and resources are needed tocomplete the circuit detection.This topic integrates all the circuit parts into one chip, including detection resistance, operational amplifier circuit andanalog to digital conversion circuit. Highly integrated circuit makes the external resources on the chip more intensive,so that current detection can be carried out inside the circuit, so that the circuit can be better integrated. Thefront-end circuit of this project uses two-stage cascade operational amplifier and cascade tube to reduce the currenterror caused by channel length modulation effect. In 10-bit SAR ADC, the transmission gate with strong capacitivedriving ability ensures the effective accuracy of the analog-to-digital converter. Comparator module uses regenerativelatch and hysteresis comparator as basic unit to solve the difficult problem of precision measurement. This topic can beused as a small part of the embedded chip to detect the micro-current in the chip 1 mA~100 mA, the working voltageis about 1.8v, and the current detection accuracy is expected to reach the requirement of 10 uA.
標(biāo)簽： 電流檢測(cè) 電路 運(yùn)算放大器 adc
上傳時(shí)間： 2022-04-03
上傳用戶：
本文首次設(shè)計(jì)并驗(yàn)證了基于macom三合一芯片設(shè)計(jì)的光模塊電路,該電路旨在提供一種滿足SFF-8472中規(guī)定的數(shù)字診斷功能的低成本SFP+模塊。電路采用激光器驅(qū)動(dòng)、限幅放大器、控制器以及時(shí)鐘恢復(fù)單元集成的單芯片,在保證高精度數(shù)字診斷功能基礎(chǔ)上,實(shí)現(xiàn)了低成本高可靠的特點(diǎn)。該電路在光接收接口組件與激光器驅(qū)動(dòng)和限幅放大器單元的限幅放大器部分之間接入濾波器來(lái)提高模塊的靈敏度及信號(hào)質(zhì)量。在控制器單元的數(shù)字電位器的引腳上采用外加電阻的方式避免出現(xiàn)上電不發(fā)光的故障問(wèn)題。該研究結(jié)果為下一代SFP-DD光模塊設(shè)計(jì)與開(kāi)發(fā)工作,奠定了一定的理論與實(shí)踐基礎(chǔ)。This paper designs and validates the optical module circuit based on the MACOM Trinity chip for the first time.This circuit aims to provide a low-cost SFP module which meets the digital diagnosis function specified in SFF-8472.The circuit uses a single chip integrated with laser driver,limiting amplifier,controller and clock recovery unit.On the basis of ensuring high precision digital diagnosis function,it achieves the characteristics of low cost and high reliability.The circuit connects a filter between the optical receiving interface module and the limiting amplifier part of the laser driver and limiting amplifier unit to improve the sensitivity and signal quality of the module.The pin of the digital potentiometer in the controller unit is equipped with an external resistance to avoid the problem of power failure.The research results lay a theoretical and practical foundation for optical module design in high-speed data center.
上傳時(shí)間： 2022-04-03
上傳用戶：
如果在調(diào)諧器或電視機(jī)附近使用本機(jī)或任何其他使用微處理器的電子設(shè)備，則可能會(huì)產(chǎn)生圖像的噪聲或干擾。如果發(fā)生這種情況，請(qǐng)采取以下步驟將本機(jī)安裝在盡可能遠(yuǎn)離調(diào)諧器或T的地方。遠(yuǎn)離調(diào)諧器或T，遠(yuǎn)離本機(jī)的電源線和輸入/輸出連接電纜。尤其在使用室內(nèi)天線或300歐姆饋線。我們建議使用室外天線和75 Q / ohm同軸電纜Noise or disturbance of the picture may be generated if this unit or any other electronic equipment using microprocessors is used near a tuner or TV If this happens, take the following stepsInstall this unit as far away as possible from the tuner or T Run the antenna wires from the tuner or T away from this unit ' s power supply cord and input/output connection cables. Noise or disturbance tends to occur particularly when using indoor antennas or300 ohm feeder wires. We recommend using outdoor antennas and 75 Q/ohm coaxial cables
標(biāo)簽： 功放
上傳時(shí)間： 2022-04-22
上傳用戶：
高性能低成本的圖像采集和處理系統(tǒng)在自動(dòng)測(cè)量、設(shè)備檢測(cè)、安全監(jiān)控等工業(yè)測(cè)控領(lǐng)域需求巨大。相比于CMOS圖像傳感器，CCD圖像傳感器在靈敏度、分辨率、噪聲控制以及技術(shù)成熟度等方面具有明顯優(yōu)勢(shì)。發(fā)達(dá)國(guó)家對(duì)于基于CCD圖像傳感器的高性能圖像采集和處理系統(tǒng)的開(kāi)發(fā)已經(jīng)具有了一定的經(jīng)驗(yàn)和成功先例，而在我國(guó)，相關(guān)的技術(shù)開(kāi)發(fā)還比較薄弱。因此，通過(guò)對(duì)基于CCD圖像傳感器的高性能圖像采集和處理系統(tǒng)進(jìn)行研究和開(kāi)發(fā)，迅速掌握核心技術(shù)，積累必要的技術(shù)儲(chǔ)備和經(jīng)驗(yàn)，對(duì)滿足我國(guó)在相關(guān)領(lǐng)域的需求有著重要意義。本文研究了CCD圖像傳感器的發(fā)展歷程、結(jié)構(gòu)及工作原理、性能特點(diǎn)，并與CMOS圖像傳感器進(jìn)行了比較。詳細(xì)分析了SONY公司的大面陣CCD圖像傳感器，并以此器件為核心完成了圖像采集和處理系統(tǒng)的設(shè)計(jì)。選用CYPRESS公司的LC4256V型CPLD（Complex Programmable Logic Device）芯片和TI公司的MSP430F149型MCU（Micro Controller Unit）芯片共同構(gòu)成系統(tǒng)的核心處理平臺(tái)。以CPLD為設(shè)計(jì)載體，使用Verilog硬件描述語(yǔ)言實(shí)現(xiàn)了驅(qū)動(dòng)時(shí)序設(shè)計(jì)，完成了對(duì)CCD圖像傳感器的控制。對(duì)CYPRESS公司的CY7C68013型USB器件進(jìn)行了固件程序、驅(qū)動(dòng)程序和應(yīng)用程序開(kāi)發(fā)，實(shí)現(xiàn)了高速數(shù)據(jù)傳輸。硬件上采用了模塊化設(shè)計(jì)，并充分考慮了抗干擾措施。實(shí)際測(cè)試表明，上述系統(tǒng)工作穩(wěn)定，具有良好的靈活性和可擴(kuò)展性。
上傳時(shí)間： 2022-06-23
上傳用戶：kingwide
GM6256 是一款集指紋快速匹配、低功耗以及安全功能的高性能 MCU((Microcontroller Unit)，提升了產(chǎn)品的綜合用戶體驗(yàn)及安全級(jí)別。GM6256 具有豐富的片上外設(shè)，支持 2 個(gè) QSPI Master（其中一個(gè)為 Flash 控制器），1 個(gè)SPI Master，1 個(gè) SPI Slave 以及 1 個(gè) I2C Master，最多 3 個(gè) UART。GM6256 最高工作主頻達(dá)到 144MHz，在低功耗模式下工作頻率可降低到 32kHz 以減少工作電流。極低的待機(jī)功耗也是GM6256 的主要特點(diǎn)，Deepsleep 模式電流可以達(dá)到 3uA，最多支持三個(gè)管腳喚醒和實(shí)時(shí)時(shí)鐘定時(shí)喚醒。GM6256 采用 QFN60 封裝，主要面向智能門鎖市場(chǎng)。GM6256 安全芯片通過(guò)了 ISCCC 中國(guó)信息安全認(rèn)證中心 EAL4+安全認(rèn)證，內(nèi)嵌了對(duì)稱加密 AES、HMAC-SHA256 和非對(duì)稱 ECC/RSA 算法，真隨機(jī)數(shù)模塊，密鑰管理，訪問(wèn)控制和電壓、溫度、光安全傳感器。采用模數(shù)混合技術(shù)設(shè)計(jì)，內(nèi)部集成多種功能的模擬模塊，減少外圍電路設(shè)計(jì)，有效降低板級(jí)系統(tǒng)的成本。
標(biāo)簽： gm6256 指紋平臺(tái)微控制器
上傳時(shí)間： 2022-07-09
上傳用戶：
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