发布者：zl5712176 上传时间：2024-04-09
资源简介：CompactLogix教程-3编程介绍.flv - 127.74MBCompactLogix教程-2编程入门.flvCompactLogix5000视频教程AB视频教程+视频播放器第31-32学时.csf - 80.83MB第29-30学时.csf - 126.49MB第27-28学时.csf - 131.14MB第25-26学时.csf - 125.34MB第23-24学时.csf - 123.27MB......
发布者：抬脚的猫 上传时间：2024-04-09
资源简介：为了适应图像传感系统日益提高的性能需求，采用E2V公司的低噪声CMOS图像传感器设计一种的集成度高、灵活简便的成像电路。该成像电路由电源模块、驱动模块、数据处理模块、时序控制模块等组成。FPGA作为主控芯片产生所需的驱动时序和控制信号，上位机通过千兆以太网卡对成像系统进行采集和控制，最后对成像系统进行噪声和成像测试，试验结果表明，在室温的条件下，8ms积分时间系统的平均噪声为0．64LSB，可以满足需求。The imaging circuit With flexible , simply and high integration based on E2V＇ low-noise CMOS image sensor is designed to meet the increasing performance requirements on imaging system. This circuit of imaging system consists of power module, driver module, data processing module, timing control module and so on. FPGA is used as the main control chip to generate the required drive timing and control signals and the upper computer drive and control the imaging system through the gigabit Ethernet card. Finally, the noise and imaging tests are carried out, and the experimental result shows that the system average noise of the 8ms integration time is 0.64LSB at room temperatures and meets requirement.
发布者：taige 上传时间：2024-04-09
资源简介：Day05Day04Day03Day02Day012019最新Django全套教程【千锋Python】-封面图.png - 110.64KB千锋Python教程：09.数据常规操作，级联数据2.mp4 - 202.49MB千锋Python教程：08.数据常规操作，级联数据1.mp4 - 185.07MB......
发布者：qingyunyimo 上传时间：2024-04-08
资源简介：针对自来水厂二级泵站负荷变动大,不稳定,经常存在大马拉小车的情况,另一方面还必须保证恒压供水,而且要满足集中管理分散控制的要求,采用常规电气元件及变频器,设计了一种变频一拖二电路,具有投入少、控制灵活、运行可靠、节能显著、易于集控等特点。经过检测及应用完全能够满足自来水厂二级泵站的需求。在别的行业,若工况相同,也可直接应用。
发布者：徐净宇 上传时间：2024-04-08
资源简介：奔驰Vediamo工程师编程 - 2.52MB奔驰Vediamo软件编程视频第2天奔驰Vediamo软件编程视频第1天EGS工程师编程后在线设码.tvs221187左前门在线编程.tvsC面(23至32)奔驰DTS编程B面(13至22)奔驰DTS编程A面(1至12)奔驰DTS编程 - 25.16MB(07)复习创建数据库导入编程数据 .wmv - 30.24MB......
发布者：c5433137 上传时间：2024-04-08
资源简介：Mastercam 2017编程初学全套视频教程DVD2.rar - 2.02GBMastercam 2017编程初学全套视频教程DVD1.rar - 1.87GB其它教程 2019.11.08.rar - 25.56KB打开视频提示错误需改名.png - 259.20KBMC2017 刀路图档.rar - 18.02MB4第四节 常用功能的设定.mp4 - 102.13MB
发布者：superhaoge 上传时间：2024-04-08
资源简介：水下长电缆供电系统电压降落分析是水下远距离生产控制系统供电方案设计的关键环节之一，主要影响因素有负荷大小、电缆长度、电缆横截面积等。通过建立等值电路模型进行水下生产控制系统供电分析，计算水下生产控制系统供电电压和电缆截面，对比不同电压等级和电缆截面下的电压降落，得出最佳的供电系统设计方案。应用本文方法对荔湾3—1气田水下生产控制系统不同供电方案进行了比较，推荐了合理的供电电压和经济的电缆截面配置，为今后长距离水下生产控制系统供电方案的设计积累了经验。Analysis of voltage drop in the long cables is one of the key steps in the power supply design for remote subsea production control systems. The long cable＇s voltage drop is mainly affected by the load, length, cross section area of the cable and etc. In this paper, the equivalent circuit model was established to analyze the power supply of subsea production control systems, calculate the supply voltage as well as the cable section, and compare the voltage drops at different voltage levels and different cable cross sec- tions, and finally, to obtain the optimal power supply scheme. The method was used to compare the vari- ous power supply schemes of LW3-1 gas field subsea control system, and recommended the reaso...
发布者：zwq 上传时间：2024-04-08
资源简介：PM 5轴后处理五轴结构基础.wmv - 759.85MB9-教程7.rar - 169.76MB8-教程6.rar - 177.82MB7-教程5.rar - 208.82MB6-教程4.rar - 249.98MB5-教程3.rar - 180.71MB4-教程2.rar - 216.83MB3-教程1.rar - 141.35MB......
发布者：etyang1988 上传时间：2024-04-08
资源简介：1-PowerMill编程视频教程资料赠送PowerMill2019编程视频教程PowerMill2017编程教程视频39-编程刀路案例讲解39-编程刀路案例讲解.avi - 121.39MB2-赠送PM编程2 - 14.88MB1-赠送PM编程案例1 - 1.76MB送5轴编程文档练习一套.rar - 4.21MBPowerMILL编程视频8.0......
发布者：张西子 上传时间：2024-04-08
资源简介：在高中物理电路问题的教学中，经常用部分电路欧姆定律和全电路欧姆定律配合求解简单电路问题，但在求解一段含源电路和复杂电路问题时，采用这种方法往往无能为力。笔者在教学中尝试引入求解这类问题的有效方法一电势分析法，从而解决了上述困难，提高了学生对电路规律的认识．
发布者：yopzhao 上传时间：2024-04-08
资源简介：视频 欧姆龙CP1E 编程与应用视频 - 78.42MB9课 CP1E 编程.wmv - 128.95MB8课 CP1E 编程.wmv - 102.01MB7课 CP1E 编程.wmv - 200.24MB6课 CP1E 编程.wmv - 82.44MB5课 CP1E 编程.wmv - 154.50MB4课 CP1E 编程.wmv - 86.86MB2课 CP1E 编程.wmv - 170.23MB1课 CP1E 编程.wmv - 82.29MB......
发布者：2057188940 上传时间：2024-04-08
资源简介：基于解决传统舰船测磁仪信号采集电路不能获得真实三分量磁场信号、电路结构复杂且故障率高，不能实时准确获得探头深度等问题。设计了一个用于舰船测磁仪上的信号采集电路。利用高灵敏度三轴磁通门传感器Mag-03获取舰船磁场信号，用谐波选择法获得的感应电动势的二次谐波分量来度量磁场信号，同时根据舰船测磁实际需求设计了深度传感器。应用环境下，本系统可以使舰船测磁仪达到0～±60μT的测量精度，并误差≯1％。通过实际使用，证明这样设计出的信号采集电路使便携式测磁仪变得更加简单有效。In order to solve the traditional ship magnetometer signal acquisition circuit cannot get the real three-component magnetic field signal, the circuit structure is complex and the failure rate is high, cannot obtain the depth of the probe in time and so on.Designed a signal acquisition circuit for the ship magnetometer. The circuit uses the high-sensitivity three-axis fluxgate sensor Mag-03 to obtain the shipJs magnetic field signal, and obtains the second harmonic component of the induced electromotive force by the harmonic selection method to measure the magnetic field signal. At the same time, according to the actual demand of the ship magnetometer Depth sensor. In the application environment, the syste...
发布者：张西子 上传时间：2024-04-08
资源简介：传统的电工基础实验教学正面临着安全问题、器材缺乏和实验操作繁琐的困境,引入电路仿真软件可以有效解决传统实验方法的问题。本文阐述了传统实验方法的困境和电路仿真软件的特点,并结合电路仿真软件的应用实例分析了电路仿真软件的优势,以及仿真实验与传统实验的区别。
发布者：cxg1990 上传时间：2024-04-08
资源简介：一直以来，电路部分的知识内容是初三学生特别是女同学非常头疼的地方，是学习物理兴趣非常低落的所在，更是学习成绩两极分化的开始．电路知识的掌握对后续的欧姆定律和电功率等知识点的学习起着至关重要的作用．有人说运动场上得田径者得天下，而在这里可以这样说，电学内容得电路者得天下．古时打仗，重要关隘称为兵家必争之地．教师和学生在电路部分的教学也是丝毫不能大意的．
发布者：tb546722_33 上传时间：2024-04-08
资源简介：直流开关电源一般采用软开关谐振的方式,可以利用高频变压器在高频环境下的漏感和分布电容构成LCC串并联谐振回路。为满足模块化电源系列化生产的需要,本文设计了一种组合U型磁芯平面变压器,通过调整条型金属软磁磁芯的磁导率来调整变压器的漏感,以满足软开关电源谐振电路的需要。
发布者：zdd 上传时间：2024-04-08
资源简介：为提高蜗杆测量精度，设计了新的测量机测头数据采集电路。基于FPGA并采用自顶向下设计方法和Verilog HDL编程技术，设计了采集电路的逻辑控制模块。基于AD977设计了三通道模数转换电路，每通道由独立的模数转换器及其前端信号调理电路构成。FPGA与前端模数转换电路以及后端数据总线之间均设计了电平转换电路。对所设计电路在测量机上进行了综合噪声实际测试，结果表明所采集数据的样本标准差均低于0．5μm，达到了预期目的。The new data acquisition circuit of the probe was designed for improving the measurement accuracy of the worm on the gear measuring machine. The top-down design method was used in the FPGA implementation based on the Verilog HDL for the logic control module. The AD977 was adopted in analog -to-digital conversion circuit consisted of three independent channels and each channel contains an A/D converter and its signal disposal circuit. The level shift circuit was used in both the FPGA front-end interface with the A/D and the FPGA after-end interface with the data bus. Comprehensive noise measurement was carried out for the data acquisition circuit. The results show that the sample standard deviation of the data collected is less th...
发布者：qleng 上传时间：2024-04-08
资源简介：一、汽车电路原理图的识读技巧 汽车电路原理图只表明组成汽车电路的各个电气设备的工作原理，如电流走向、流过电气装置的顺序等，图上的导线只表明各电气设备及其间的相互联系，而不代表实际安装位置。汽车电路原理图中电气装置的布置顺序从左到右、从上到下为：供电电源（特别是蓄电池）在左，用电器在右，各局部电路尽量画在一起；火线在上，搭铁线在下。
发布者：344190914 上传时间：2024-04-08
资源简介：采用高温熔融水淬的方法,制备了无铅低熔点耐酸玻璃粉,研究了化学组分及其含量对无铅玻璃耐酸性的影响。结果表明：当质量分数w（Bi2O3）为50%60%,w（B2O3）为10%12%,w（SiO2）为20%30%,w（Al2O3）为3%5%,w（Li2O）为1%3%时,可获得膨胀系数在（6575）×10–7/℃,软化点在480490℃,玻化温度在（600±10）℃,附着力优良,在质量分数5%的H2SO4中浸泡48 h,玻璃的光泽基本不变的无铅玻璃粉。Lead-free glass was synthesized through high-temperature melting, water quenching and grinding. The effect of the composition and content on the acid resistance property was researched. The results indicate that when the glass is synthesized with mass fraction of 50%-60% Bi2O3, 10%-12% B2O3, 20%-30% SiO2, 3%-5% Al2O3 and 1%-3% Li2O. The acid resistant and lower melting point lead-free glass is obtained, with the thermal expansion coefficient of（6575）×10–7/℃, the soften point of 480490 ℃, and the glass transition temperature of（600±10） ℃. Glassy luster is invariant after dipping in 5%（mass fraction） H2SO4 for 48 h.
发布者：qx207811 上传时间：2024-04-08
资源简介：高等农业院校电路理论课程在教学手段、教学方法、教学内容、教材建设、实践教学和教学考核等方面存在许多问题,电路理论课程教学改革应该坚持传统板书与现代教育技术相融合、实验演示与现代仿真相融合、教学方法与因材施教相融合、教学模式与教材改革相融合、教学内容与工程实例相融合、基本实验与综合实验相融合、课堂教学与网络教学相融合、传统单一考试与多样化考核相融合、教学与科研相融合、中文与英文相融合等＂十大融合＂教学模式,应用现代教学手段解决教学改革存在的主要问题,激活电路理论课程教学,提高教学质量和学习效率,使电路理论教学更符合新形势下高等学校应用型人才培养模式。
发布者：amberlyz 上传时间：2024-04-08
资源简介：工作原理 东风EQlll8／1141汽车雨刮器开关有4个挡位：高速挡、低速挡、间歇挡和关闭复位挡。两种车型的雨刮控制原理相同．都是用开关控制电机不同形式的搭铁实现不同挡位。高低速刮水工作通过开关控件电机的高低速负电刷搭铁实现．电流经保险一电机正电刷一高速（或低速）负电刷一高挡（或低挡）开关一搭铁形成回路。
发布者：344190914 上传时间：2024-04-08
资源简介：一种陀螺供电电源厚膜混合集成电路集成了陀螺马达电源和同步器激磁电源。陀螺马达电源为三相方波电源，由晶体振荡器、可编程分频器、脉冲分配器、电平转换器、驱动器等组成。三相方波频率可变，具有很高的频率稳定度和幅值稳定度。同步器激磁电源是由晶体振荡器、分频器、带通滤波器、移相网络和增益调节单元等组成的正弦波激励源，它输出幅值连续可调的的正弦波信号。该电路具有体积小、重量轻、可靠性高、调试简单等特点。
发布者：chenyiebo 上传时间：2024-04-08
资源简介：以集成电路设计中应用较多的有障碍直角斯坦纳树为切入点,对模拟退火法和最小生成树法得到的斯坦纳树进行绕障碍优化,提出进一步缩减总体线长的方法。根据边与障碍的相交关系,对初始直角斯坦纳树进行分类,利用改变直角化方式和绕行障碍边界方式变化布线图;提出检测线路空U并对其进行缩进和变换的方法,清除冗余的线段,将现有斯坦纳树的总体线长缩短到更加接近最优的地步。Aiming at the right-angle Steiner tree with obstacles which is widely used in integrated circuit design,obstacles optimization was applied to two methods of Steiner tree generated using simulated annealing method and the minimum spanning tree method.A method was additionally proposed to reduce general circuit length.The relationship of initial right-angle Steiner tree and obstacle was sorted according to their position,wiring strategy was used by changing the way of right-angle line manners and going round obstacle boundary.The way of testing,intending and transforming the empty U was put forward,and the redundant line was removed,the general Steiner tree line＇s length was shortened to an optimal degree.
发布者：huhuhuhuhe 上传时间：2024-04-08
资源简介：为提高负载动态响应特性，针对抽头电感同步整流Buck变换器所实现的大变比降压电路的特点，本文提出一种变结构电容电荷平衡辅助电路控制策略。所提出的控制策略根据电容电荷平衡原理，在负载发生变化时通过辅助电路改变主电路结构，使电感电流变化率适时变化，以克服恒压输出电力电子变换器负载突变时由于电感电流变化率受限而影响输出电容电压变化的不足。通过理论分析表明，所提出的控制策略辅助电路结构简单，无需增加磁性器件；控制逻辑能使变换器在负载扰动下实现快速的输出电容充放电平衡，具有较强的负载扰动抑制能力；控制方法具有快速动态响应、不影响稳态特性且过冲小等优点。仿真和实验结果验证了所提控制策略的有效性。To improve dynamic load response, a control strategy is proposed in this paper on the basis of capacitor charge balance theory that is aiming at structural features of the tapped inductor synchronous rectification Buck con- verter and the so called large ratio Buck converter. The strategy is realized by means of auxiliary circuit which chan- ges the structure of large ratio converter main circuit while load is changing, then an adaptive inductor currentchanging rate is achieved so that limitation of dynamic load response speed with fixed inductor current changing rate of constant output voltage converter is covered effectively. Theoretical analys...
发布者：勋心 上传时间：2024-04-08
资源简介：针对冲击发电机供电的延时驱动电路延时不准确、驱动可靠型差的问题，根据冲击发电机输出能量特点，利用CD4541B型可编程计时器设计了低功耗、高精度电子延时器，提出了降低电子延时器功耗的方法。在充分考虑冲击发电机单脉冲输出特性的基础上，设计出一种小体积，可单次脉冲供电实现精确延时、可靠性高的延时驱动电路。
发布者：zbf123 上传时间：2024-04-08
资源简介：针对新一代工业数控系统对交流伺服驱动控制系统提出的小型化、高功率密度的迫切需求,提出一种新型功率伺服驱动模块。该模块集栅极驱动、功率变换、信号传感、电路保护等多功能于一体。重点研究了功率开关器件MOSFET的驱动电路和过压、过流及过温保护电路,详细说明了各保护电路结构及参数的优化计算方法。试验结果表明：该伺服驱动模块具有体积小、驱动能力强、功率密度高、功耗低和可靠性高等优点。Aiming at the urgent demand of miniaturization and high power density of AC servo drive control system for the new generation industral numerical control system,a novel power servo drive module is proposed.Functions such as grid drive,power conversion,signal measurement,and circuit protection are integrated into the designed module.Focusing on the over-voltage,over-current and over-temperature protection circuit of the power switch device MOSFET,the circuit structure and the parameter optimization method are introduced in detail respectively.The experimental results further indicate that the designed power servo drive module has the advantages of small volume,high driving ability,high power density,low power consumption,and high reliability,etc.
发布者：wzj19880613 上传时间：2024-04-08
资源简介：分析了宁夏电力交换网的现状及存在的问题，提出了IP方式接入变电站语音的优化方案，能够在保护已有投资和不影响业务安全稳定的情况下，实现VoIP的部署和应用，对新建站及老旧站改造具有一定借鉴意义。The present situation and existing problems of Ningxia electric power switching network are analyzed, and the optimized scheme based on IP is proposed, to protect the existing investment and does not affect the security and stability of the situation, to achieve the deployment and application of VolP, which is a certain reference for the construction of new station and the transformation of the old station
发布者：zhouyibjjtdx 上传时间：2024-04-08
资源简介：为解决工业设备中润滑油膜厚度不易测量的问题,以谐振模型和弹簧模型为理论依据,设计并制作了油膜厚度超声测量电路,其中包括脉冲发生与控制电路、超声激励电路和反射波接收电路。利用所设计的超声测量系统进行实验,完成了对油膜厚度的测量。测量结果的相对误差在5%以内,证明了所设计的测量电路和测量方法是可行的。This paper studies the ultrasonic measurement of oil-film thickness in order to solve the difficulty of film thickness measurement in industry. It also presents an ultrasonic measurement circuit which is used to obtain the lubricating film thickness, based on the resonance model and the spring model. The circuit consists of a pulse generator and controlling circuit, an ultrasonic excitation circuit and a reflected wave receiving circuit. The experiments are successfully made on measuring the film thickness in the designed circuits. As a result, the film-thickness values agree well with the actual thickness information, its relative error is less than 5%. The ultrasonic measurement circuit and the measurement method are proved to be practical.
发布者：石中玉3571 上传时间：2024-04-08
资源简介：ETS-868数字集成电路测试系统是一款面向大规模数字集成电路测试的通用测试系统，其测试开发流程主要有：对被测电路进行可测试性评估、测试接口板设计制作、测试定义设置、测试向量转换和调试、直流参数测试编程、交流参数测试编程、功能测试编程、自动测试程序建立等。
发布者：lxl81691 上传时间：2024-04-08
资源简介：在链路带宽具有不均衡性的传输网络中,传统电路交换（TCS）端到端的建路机制会造成带宽资源浪费。针对此问题,提出了一种基于存储的资源调度算法,即中间存储转发调度（ISTS）算法。仿真结果表明,与TCS相比,ISTS能够有效提高传输成功率和链路利用率。In transport networks with unbalanced link bandwidth, the traditional circuit switching（TCS） end-to-end path establishment mechanism will cause bandwidth resource wastage. For this problem, a storage-based resource scheduling algorithm, Intermediate Store and Transfer Schedule（ISTS） algorithm has been proposed in this paper. The simulation results show that, compared with TCS, ISTS algorithm can effectively improve the transmission success rate and link utilization.
发布者：chenhong515 上传时间：2024-04-08
资源简介：知识管理作为一种辅助员工获取、存储、分享、利用和更新知识的有效方式，不仅能为提升员工技术水平、积累实践经验提供有力支撑，还可以与产品化管理机制相结合，帮助企业实现缩短新产品研发周期、产品成熟度快速提升的目标。
