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蓝牙(Bluetooth)设备查找、蓝牙服务发现启动、蓝牙虚拟串口通信

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蓝牙(Bluetooth)设备查找、蓝牙服务发现启动、蓝牙虚拟串口通信

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log gabor 滤波器matlab程序
log gabor 滤波器matlab程序 log gabor 滤波器matlab程序

2020-12-10下载

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基于stm32的音乐播放器设计
【实例简介】本设计是基于stm32的一个音乐播放器，采用硬件解码芯片VS1003，显示部分采用OLED。

2021-11-18 00:34:31下载

积分：1
PSAT工具软件
概述PSAT( Power System Analysis Toolbox)，中文翻译为电力系统分析软件包，包含了：PF-潮流计算；CPF-连续潮流；OPF-最优潮流；SSSA-小扰动分析；TDS-时域仿真；GUI-用户人机界面；GNE-自定义模型等功能。经过验证，该工具包已经可以计算上千节点规模的系统。而且该软件包源代码完全公开，因此用户可以根据自己的研究兴趣编写修改相应源代码实现研究目的。同时, 依托于Matlab 的强大计算功能以及丰富的控制、信号处理、鲁棒控制、模糊控制等工具箱, 使得PSAT 可以把控制科学、信号处理等方面的新思想与电力系统的传统仿真计算有机地结合起来[1]。系统

2020-12-03下载

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三相永磁同步电机国标
便于读者对永磁同步电机型式实验项目进行学习，有利于对永磁类电机的技术开发LEPGB/T22669-2008前言本标准参考采用了GB/T1029-2005《三相同步电机试验方法》、GB/T1032—2005《三相异步电动机试验方法》、GB/T13958-2008《无直流励磁绕组同步电动机试验方法》IEC60034-2-1:2007《旋转电机(牵引电机除外)确定损耗和效率的试验方法》和美国标准 IEEE Std112:204《多相感应电动机和发电机试验方法》的相关内容。本标准内容是广泛采用的公认的试验方法适应国际贸易技术交流和经济发展的需要。为满足特殊研究或应用的需要,可按本标准未作规定的附加方法进行试验本标准制定了适用于永磁同步电动机的“B法”测定效率的方法;基准温度采用了IEC6034-21200?的规定;给出了电机性能计算格式等本标准的附录A为规范性附录附录B和附录C为资料性附录。本标准由中国电器工业协会提出本标准由全国旋转电机标准化技术委员会(SAC/TC26)归口。本标准由上海电器科学研究所(集团)有限公可负资起草其他主耍起草单位有:江苏安捷机电技术有限公司、河南特高特电机科技发展有限公司、华北电力大学、广东江门江晟电机有限公司、安徽明腾永磁机电设备有限公司、卧龙电气集团股份有限公司。本标准主要起草人;陈伟华、倪立新、金惟伟、周志民、罗应立、刘华涛、袁福民、鲍周清、朱兴恒温旭、严伟灿、李秀英姚丙雷、张宝强陈亦新本标准为首次发布。EpicGB/T22669-—2008三相永磁同步电动机试验方法范围本标准规定了三相水磁同步电动机的试验方法本标准适用于自起动三相永磁同步电动机,静止变频电源供电的同步电动机试验可参照使用,不适用于有直流励磁绕组的同步电动机。2规范性引用文件下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,共随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准,然而,戴励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件,其最新版本适用于本标准。GB755—2008旋转电机定额和性能(IEC60034-1:2004,IDT)GB/T1029—2005三相同步电机试验方法GB/T10322005三相异步电动机试验方法GB10068—2008轴中心高为56mm及以上电机的机槭振动振动的测量、评定及限值(IEC60034-14:2003,IDT)GB/T10069.1-2006旋转电机噪声测定方法及限值第1部分:旋转电机噪声测定方法ISO1680:1999,MOD)GB/T13958-2008无直流励磁绕组同步电动机试验方法1EC60034-2-1:2007旋转电机(牵引电机除外)确定损耗和效率的标准试验方法3主要符号cosq功率因数电源频率(Hz)I1—定子线电流(A)——空毂线电流(A)Ik—堵转线电流〔A额定电流(A)—直流电机电枢电流(A)K—导体材料在0℃时电阻温度系数的倒数铜K1=235铝K1=225除非另有规定正d——转矩读数修正值(N·m)J——转动惯盘(kg·m2)n—试验时测得的转速(r/min)p一电机的极对数P1-输入功率(W)P2--输出功率(W)Ps--额定(输出)功率(WP铁耗(W)Pt—风摩耗(W)CEPICCB/T22669-2008P—剩余损耗(W)Ps杂散损耗(WPs—空载杂损耗(W)P。—一空载输入功率(W)PK—堵转时的输入功率(WPm—定子绕组在试验温度下P2R损耗(W)Poau空载时在试验温度下定子绕组PR损耗(WPaus—定子绕组在规定温度(0)下IR损耗(WR1——温度为阴1时定子绕组初始端电阻(g)RN-额定负载热试验结束时定子绕组端电阻〔)R:—试验温度下测得(或求得)的定子绕组端电阻()Rs—换算到规定温度()时的定子绕组端电阻(Q)R—-空载试验(锵个电压点)定子绕组端电阻(a)Ta—转矩读数(N·m)T如-—空载(与测力机连接)转矩读数(N·m)T—修正过的转矩(N·m)TK堵转时转矩(N·mT-—在试验电压L,下测得的失步转矩(N·m)TN一一额定电压时的失步转矩(N·m)T—最小转矩(N·mT—在试捡电压U下测得的牵入转矩(N·mTN-一额定电压下的标称牵人转矩N·m)T—异步转矩(N·m)Tx-永磁制动转矩(N·m)U—端电压(v)U。—空载试验端电压(V)Ux堵转试验端电压()Ux—额定电压(v)01—测量初始(玲)电阻R1时的绕组温度℃)a-一额定负载热试验期间测取的定子绕组最高温度℃4-试验时测得的定子绕组最高温度〔℃O.一热试验结束时冷却介质温度(℃日--负载试验时冷却介质温度(℃)标准规定的基准温度(℃0-计算效率时规定的定子绕组温度(℃—空载试验时定子绕组温度(℃)△61--定子绕组温升(K—效率(%)4试验要求4.1试验电游4.1.1电压4.1.1.1电压波形试验电源的谐波电压因数(HVF)应不超过0,02;在进行热试验时应不超过0.015CEpiCCB/T22669-20084.1.1.2电压系统的对称性三相电压系统的负序分量和零序分量均应不超过正序分量的1.0%在进行热试验时,电压系统的负序分量应不超过正序分量的0.5%零序分量的影响应予以排除。4.1.2频率4.1.2.1频率偏差试验期间,电源频率与规定频率之差应在规定频率的士0.3%范围内。1.22频率的稳定性试验期间不允许频率发生快速变化,因为频率快速变化不仅影响被试电机,也会影响到输出测量装置。测量期间频率变化量应小于0.1%42测量仪器4.2.1概述因为大多数仪器的准确度等级通常以满量程的百分数表示。因此,应尽量按实际读数的需要,选择低量程仪表。影响仪器测量结果准确度的因素a)信号源负载;b)引接线校正c)仪器的量程、使用条件和校准。4.2.2电量测量仪器通常,电量测量仪器的准确度应不低于0.5级(满量程,兆欧表除外)。用B法(见10,2,2)测定电机效率时,为保持试验结果的准确性和重复性,要求仪器的准确度等级不低于0.2级(满量程)般来说,电子仪器是多用途的,与无源仪器(非电子式)相比,有非當大的翰入阻抗,无需因仪器自身损耗而修正读数。但高输入阻抗仪器对干扰更为敏感。应依实践经验,采取减少于扰的措施。测盘用仪用互感器的准确度等级应不低于0.2级(满量程)4.2.3转矩测量仪一般试验用转矩测量仪(含测功机和传感器)的准确度等级应不低于0.5级。采用B法(见10.2.2测定效率时,转矩测量仪的准确度等级应不低于0.2级(满量程)4.2.4转速与频率测量仪转速表读数误差在土lr/min以内。频率表的准确度等级应不低于0.1级(满量程)4.2.5电阻测量仪绕组的直流电阻用双臂电桥或单臂电桥,或数字式微欧计测量准确度应不低于0.2级。4.2.6温度测量仪温度测量仪的最大允许误差为士1℃4.3测量要求4.3,1电压测量测量端电压的信号线应接到电机端子,如现场不允许这样连接,应计算由此引起的误差并对读数作校正。取三相电压的算术平均值计算电机性能三相电压的对称性应符合4.1.1.2的要求4.3.2电流测量应同时测量电动机的每相线电流,用三相线电流的算术平均值计算电动机的性能。使用电流互感器时接入二次回路仪器的总阻抗(包括连接导线)应不超过其额定阻抗值对I

2021-05-06下载

积分：1
HIDKomponente_1.0.34
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2020-11-30下载

积分：1
Rohde&Schwarz 频谱仪操作手册（英文）
Rohde&Schwarz 频谱仪操作手册（英文） 1145.5850系列全英文，详细的操作方式，各类使用技巧R&S FSHContentsContentsSpecificationsSafety InstructionsCertificate of qualitEC-Certificate of conformitySupport Center AddressList of R&S RepresentativesPutting into OperationFront view1.1Putting into Operation1.2Unpacking the Instrument1.2Setting up the InstrumentSwitching on the Spectrum Analyzer1.4Spectrum Analyzer Connectors1.5Screen SettingsQCountry-Specific Settings1.10Setting the Date and TimeSetting the date.1.11Setting the time1.1Charging the Battery......1.12Selecting the Instrument Default Setup1.13External Reference /External Trigger Switchover1.14Controlling the rF Attenuator1.15Using a Preamplifier…1.15PIN Entr1.17Connecting Printers.1.19Setting the Baud rate for Remote Control1.21Enabling Options1.21Checking the Installed options1.221145.5973.12E-15ContentsR&S FSH2 Getting Started2.Measurements on cw signals2.1Level measurement2Setting the Reference Level量‘面2.2Frequency Measurements2.3Harmonic Measurements of a sinewave Signal面面2.4Power Measurements Using the Power Sensor2.5Power and return loss measurements with the r&s FsH-z14 or the r&s FSH-Z444427Two-Port Transmission measurements2.9Measurement of return loss2.11Performing Distance-To-Fault Measurements...2.14Operation in Receiver Mode2.20Measuring the carrier-to-Noise power ratio2.Determining the Reference2.26Sts…2.26Selecting the reference channel2.27Entering the channel bandwidth of the reference channel2.27Selecting the unit for the reference...2.27Manually entering the reference2.27Automatic level adjustment2.27Measuring the Noise Power and Calculating Carrier Power /Noise Power.........2.28Selecting the result display2.28Frequency setting of the noise channel..2.28Setting the noise channel measurement bandwidth2.29Setting the C/N channel bandwidth2.29Automatic level adjustment2.29Correcting the displayed average noise level2.30Hiding the result display2.30Saving and Recalling Settings and Test Results2.31Saving Measurement Results2.31Saving Calibration Data2.32Recalling measurement results2.33Printing Out Measurement Results……2.341145.5973.122E-15R&S FSHContents3 Operation3.Screen LayoutScreen layout for spectrum-mode measurements without markers3.1Screen layout when the marker mode is selected3.2Entering Measurement ParametersEntering values and texts3.3Entering units3.4Menu overview.3.5Frequency entryFrequency span...Level setting…3.5Bandwidth settingTrace setting3.6Measurement functions3.7Marke3.10Save and print menu3.12Instrument setup3.12Status display3.12Menus in the Receiver Mode(option R&S FSH-K3)3.13Menu for 3GPP BTS Code domain Power Measurement (Option R&S FSH-K4)3.16Menu for Vector Voltmeter(Option R&S FSH-K2)3.161145.5973.12E-15ContentsR&S FSH4 Instrument functions4Instrument Default Setup4.1Status Display..................4.1Setting the Frequency4.2Entering the center frequency..4.2Setting a frequency offset4.2Entering the center-frequency step size4.3Entering the start and stop frequency4.4Working with channel tablesSetting the Span1面4.6Setting the Amplitude Parameters4.7Setting the reference levelEntering the display range94.9Entering the display unit4.9Entering the reference offset4.10Entering the input impedance.…………4.10Setting the Bandwidths4.11Resolution bandwidth4.11Video bandwidth4.13Setting the Sweep4.14Sweep time.4.15Sweep mode.4.15Trigger4.16Trace Settings4.19Trace mode∴4.19Detector4.20Trace memory…4.22Trace mathematics4.23Using the Markers4.24Automatic marker positioning .......4.25Using more than one marker at a time(multimarker mode).........,4.27Marker functions4.30Measuring the noise power density4.30Measuring the frequency4.31Measuring the filter bandwidth or the signal bandwidth4.32aF demodulation4.331145.5973.12E-15R&S FSHContentsUsing the dis play line…….….….….….….….….….…..….….……….…..34Setting and Using the Measurement Functions4.35Measuring the channel power of continuously modulated signals………………4.35Selecting the standard4.36Setting the reference level4.38Setting the channel bandwidth4.38Changing the spaPower displaPower measurements on TDMA signals4.42Selecting a standard∴4.42Setting the measurement time4.44Optimizing the reference level ..4.44Power readout4.45Setting the trigger4.45Measuring the occupied bandwidth4.46Selecting a standard4.47Setting the reference level4.48Setting the channel bandwidth4.49Entering the power percent to determine the occupied bandwidth4.50Displaying thupied bandwidth4.50Changing the spai1145.5973.12E-15ContentsR&S FSHMeasuring the Carrier-to-Noise Ratio.......4.52Determining the reference4.53Setting the reference channel4.53Setting the reference channel bandwidth……4.53Setting the analyzer reference level for the reference channel measurement4.54Manual reference mode4.54Inserting the c/N referenceUnits of the c/n reference4.55StandardsUSER Standard4.56User-specific standards4.56Predefined user-specific standards4.59Predefined user-specific standard Digital TX4.59Predefined user-specific standard ANalog tv mode4.60Predefined user-specific standard ctx4.60Measuring the noise channel power and calculating the carrier power/noise power.4.62Frequency setting of the noise channel………4.63Setting the noise channel bandwidth4.64Setting the C/N ratio channel bandwidth4.64Setting the reference level during noise channel measurement.4.65Selecting the c/ N result display..…,…4.65C/N measurement result display4.66Changing the span4.66Correction of inherent noise power4.67Using the R&S FSH in receiver mode4.68Setting the frequencySetting the reference level,,,。.。4.71Setting the bandwidth4.72Setting the detector4.73Setting the measurement time4.73Measurement on multiple frequencies or channels(scan)4.74Measurements using the power sensor4.76Connecting the power sensor……4.76Zeroing the power sensor.4.78Selecting the unit for the power readout4.79Setting the averaging time.……4.80Taking additional loss or gain into account4.81Measuring forward and reflected power∴4.82Zeroing the power sensor4.84Setting the power measurement weighting4.85Selecting the unit for the power readout4.86Taking additional attenuation into account4.881145.5973.126E-15R&S FSHContentsTwo-port measurements with the tracking generator489Measuring the transmission of two-ports4.91Vector transmission measurement494Measuring the transmission magnitude........4.96Measuring the transmission phase4.96Measuring the electrical length when measuring transmission面B国4.99Measuring the group delay when measuring transmission4.100Transmission measurement using the connected VSWR Bridge R&S FSH-Z3.. 4.102Sppectrum measurements with the VsWR Bridge R&s FSH-Z3 or R&S FSH-Z2connectedSetting for detecting the R&S FSH-Z3 in the transm. and spectr. measurement .. 4.104Supplying DC voltage to active DUTs4.105Reflection measurements4.105Scalar measurement of reflection4.106Vector measurement of reflection4.108Measuring the reflection magnitude4.111Measuring the reflection phase.……4.111Measuring the electrical length when measuring reflection4.112Displaying the reflection in the Smith chart4.113Measuring the group delay when measuring reflection4.118Selecting the calibration standards4.120Spectrum measurements with the vswr Bridge r&s FSH-Z3 or R&S FSH-z2connected4.121Settings for detection of the R&SFSH-z2andR&SFSH-Z3………4.122One-Port measurement of cable loss4.123Vector voltmeter.4.124Reflection measurements(S11)4.125Measuring transmission coefficients(S21)4.128Cable measurements4.134Cable selection∴4.135Selecting the frequency range…4.138Calibrating the test setupa.::::::.“14.139Locating cable faults by means of the marker function4.142Measuring spectrum and reflection4.145Further information∴4.146Setting the span4.146Selecting the center frequency.........∴4.147Measurement4.148Length measurement accuracy4.148Using limit Lines∴4.149Measurements with limit lines国面面4.151Definition range of limit lines4.152Data sets containing limit lines...4.1521145.5973.127ContentsR&S FSHMeasuring with Transducer Factors.4.153Unit for measurements with transducers4.156Reference level settings for measurements with transducers4.156Frequency range of transducer………4.156Data sets containing transducer factors4.156Field-Strength Measurement with Isotropic Antenna∴4.157Connecting the antenna to the R&S FSH4.157Measurement of the resultant field strength in a transm. channel with large bandwidth .......4.159Code Domain Power Measurement on 3GPP FDD Signals.4.166Saving and Loading Instrument Settings and Measurement Results4.173Saving results4.174Entering a data set name4.175Loading measurement results.4.175Deleting saved data sets4.176Deleting all data sets4.177Printing out Measurement Results4.178Measurements4.179How a spectrum analyzer operates…4.1791145.5973.12E-15

2020-12-10下载

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comsol是非常强悍的求解器，comsol的实例课程讲解，ppt版本，非常不错的。

2020-12-04下载

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利用神经网络进行摄像机标定的MATLAB程序
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2020-07-04下载

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2020-12-06下载

积分：1

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蓝牙(Bluetooth)设备查找、蓝牙服务发现启动、蓝牙虚拟串口通信

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