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labview 通过OPC 访问西门子PLC(LabVIEW accesses Siemens PLC through OPC)

在labview环境下编写的一个串口助手，可以读取数据，保存数据，截屏的功能，功能强大，适合初学者(A LabVIEW environment in the preparation of serial assistant, you can read the data, save data, screenshot function, powerful, suitable for beginners)

说明：  NI USB-6001电压/阻测试项目源代码（labview2017） 1，使用io触发，自动扫描io上升沿，输入io可选。 2，使用差分方式采样，双通道同时采样，采样数据实时显示。 3，可手动触发采样，采样率，采样数，测试周期可自定义。 4，可保存控件值，运行程序自动加载上次保存的控件值。 5，数据保存到.xls表格，每天新建以年-月-天命名的文件，每个月创建一个文件夹存放数据。 6，测试结果通过USB-6001自带io输出。 真实项目应用源代码!(1. Use IO trigger to scan the rising edge of IO automatically. Input IO is optional. 2. Sampling by differential mode, sampling by two channels at the same time, and real-time display of sampled data. 3. Sampling can be triggered manually. Sampling rate, sampling number and testing period can be defined. 4. The control value can be saved, and the last saved control value can be automatically loaded by the running program. 5. Data is saved to the. xls table. New files named year-month-day are created every day, and a folder is created every month to store data. 6. The test results are output by USB-6001 with io. Real Project Application Source Code!)

创建一个vi，实现对按钮状态的指示和按钮“按下”持续时间的简单计算功能，按下按钮时，对应的指示灯亮，对应的数字量显示控件中开始计时。松开按钮时，指示灯灭，计时停止。(Create a VI to realize the instructions of the button state and the simple computing function of the button "press" the duration. When the button is pressed, the corresponding indicator lights up, and the corresponding digital quantity displays the timing in the control. When the button is loosened, the light is put out and the timing is stopped.)

说明：  good file for labview beginers which tell every thing aboutdata aquation

labwindows CVI打开，操作，新建excel(CVI open, operate, new EXCEL)

labview基于声卡的语音实时采集和处理(labview sound card based real-time acquisition and processing of speech)

基于声卡的语音识别，用了LMCC等算法，包括消噪(Sound card based speech recognition, with the LMCC and other algorithms, including the de-noising)

通过labview的PID功能块对伺服电机进行闭环控制(The PID function block via labview servo motor closed-loop control)

用于交流电机矢量控制的SVPWM发波程序。(For AC motor vector control, SVPWM hair procedures.)