变频器控制(485)

labview相关滤波，相关滤波提取特征频率下的原始信号(labview correlation filtering, correlation filter to extract the original signal characteristic frequency)

虚拟仪器高级应用全书例子，用的C语言开发环境Labwindows/CVI，有各种高级应用的例子，非常值得学习参考。(Virtual instrument advanced application book example, using the C language development environment Labwindows/CVI, there are a variety of advanced application examples, it is worth learning reference.)

说明：  本代码编制测距传感器的串口通讯接口VI；通过波形图表显示连续读取的测距-时间曲线，并将有效测量范围外的数据滤除。(This code compiles the serial communication interface VI of ranging sensor, displays the continuous read ranging-time curve through waveform chart, and filters out the data outside the effective measurement range.)

labview实现 多条曲线的创建 数据保存在数组里面(labview create multi-curve data stored in the array inside)

XY图 随点位增加而实时显示,非常方便(XY chart show with the points add)

本系统可做自动控制原理中的时域分析仿真实验，系统特性如下： 1：可选择仿真系统为一阶、二阶、任意阶 2：可选择信号源为正弦波、三角波、锯齿波、方波（可模拟阶跃信号），并可调节信号源频率、幅值、相位、偏移、方波占空比 3：可选择信号采样率及采样数 4：自动计算传递函数 5：自动计算时域响应参数（增益系数、上升时间、峰值、峰值时间、稳定时间、超调量） 6：波形图同时显示原始信号和响应信号 注：使用本系统需安装labview控制设计与仿真库(The system can do automatic control theory in the time-domain analysis simulation, the system behaves as follows: 1: simulation system can be selected for the first, second, any order 2: select the signal source is a sine wave, triangle wave, sawtooth, square wave (analog step signal), and can adjust the signal source frequency, amplitude, phase, offset, duty cycle square wave 3: the the optional signal sampling rate and the number of samples 4: automatic calculation of the transfer function 5: Automatic calculation domain response parameters (gain coefficient, rise time, peak, peak time, settling time, overshoot) 6: waveform diagram shows both the original signal and the response signal Note: Use the system to be installed LabVIEW Control Design and Simulation library)

基于声卡的测试系统,可以录音并且保存声音文件,可以把声音文件回放,可以离线和在线做波形和频谱(Test system based on the sound card, you can save recordings and sound files, sound files can be playback, you can make offline and online waveform and spectrum)

说明：  labview实现串口示波器的功能，读取示波器发送的浮点数数据，并绘制曲线(Serial port oscilloscope)

（LabVIEW 2009），含例子：绘制比例积分环节、比例积分微分环节、惯性环节、积分环节阶跃响应曲线(（LabVIEW 2009），Containing examples: drawing proportional integral, proportional integral differential link, inertia, integral step response curve)

说明：  LabWidow/CVI的资料不是很多,因此我长传了一份入门教程。LabWindow CVI入门的经典教程(A guide book for learing LabWindows/CVI)