round

test on two solenoid valves connecting on one hydraulic line on/off

基于串口通信的电机控制界面，VI程序 对电机实现参数监控(Based on serial communication motor control interface, VI program to achieve the parameters of the motor monitoring)

labview中用程序去产生一个触发事件是个难点，相关的介绍和例子并不多，本程序使用值属性信号结点改变的方法去产生一个事件，实现程序控制产生触发事件的功能，labview开发版本8.2。(labview using the program to generate a trigger event is difficult, relevant examples of the introduction are not many,here we use the value change of the node attribute of the signal to generate an event, the realized the program control functions to generate trigger events, the version of labview development is 8.2 .)

本文主要论述了基于LabVIEW 的身份验证登录程序的设计与实现原理, 讨论了建立用户信息数据库以及LabVIEW与数据库的连接方式的选择,LabSQL工具的应用,实现了根据用户信息数据库进行身份验证的功能, 符合数据库信息的用户方能成功登录, 可以方便地嵌入已有的以LabVIEW 为开发工具的测控系统中。(This paper discusses the design and realization of the principle of identity validation based on LabVIEW login program, user information database as well as the choice of LabVIEW and database connections, LabSQL tool applications based on the user information database authentication user database information can be successfully logged and can be easily embedded the existing LabVIEW as the development tool measurement and control system.)

说明：  串口自动换算CRC代码，编写时直接可以调用(Serial port automatically converts CRC code, which can be called directly when writing.)

一个简单的声音采集系统，有声音采集和声音回放功能，还可以将采集到的声音在时域频域进行分析(A simple voice acquisition system has the functions of voice acquisition and playback. It can also analyze the collected voice in time domain and frequency domain.)

1. 一个完整数据采集系统的基本组成部分 2. NI 提供了基于哪些平台的数据采集硬件产品，它们分别适用于什么样的应用领域 3. 数据采集设备硬件选型过程中应该关注哪些重要参数(Introduction of NI data acquisition hardware 1. Basic components of a complete data acquisition system 2. NI provides data acquisition hardware products based on which platforms and which application areas they are suitable for respectively. 3. What important parameters should be paid attention to in the process of hardware selection of data acquisition equipment)

labview与串口通信得到串口示波器的波形图(get chart serial port)

labview中实现前面板的打印，打印格式为PDF.通过设置VI的属性实现报表打印(achieve labview front panel printing, print format is PDF. realized by setting the properties of print statements VI)

分享下labview图形显示控件，非常好用的呀(Share the labview graphical display control, very easy to use, suitable for LabVIEW beginners)