Series index ：

Preface

A sauce's private teaching ！ To see is to earn ！‍*️

Compared with the previous experiment, the knowledge points of this experiment are significantly increased , Everyone must practice more by themselves

This time, I hope you can achieve the following achievements ：

1． Learn and master the use of charts and graphs , Understand the difference ;
2． master Express VI Technology to quickly and easily build a professional testing system ;
3． Learn and master LabVIEW Documents in I/O operation .

If you need source code, click this link ： Experiment two

One 、 The experimental requirements

== requirement ：== Design a signal generator , So that it can have a variety of waveform display forms （ such as , Sine wave 、 Triangle wave 、 Custom waveform, etc ）, At the same time, the waveform frequency 、 Adjust parameters such as amplitude . The maximum value of the waveform signal can be calculated 、 Minimum and average . It can save and read various waveform data .

Beautiful interface is required ！

A sauce designed front panel ：

Two 、 Operation steps

Experimental principle ：

Experimental principle ：
（1）LabVIEW Contains many graphical display controls ： Waveform chart 、 Waveform 、XY chart 、 Intensity diagram / Chart 、 Digital oscillogram 、 Three dimensional graphics
Oscillogram and oscillogram —— Display data with constant sampling rate . Waveforms usually collect data into an array first , Then draw the data into the graph （ Draw block by block ）; The waveform chart adds new data points to the displayed data points to form a historical record （ Draw point by point ）.
XY chart —— Display data with non-uniform sampling rate and data of multivalued function .
Intensity diagram / Chart —— Display the value of the third dimension in color on the two-dimensional diagram , Display three-dimensional data on a two-dimensional diagram .
Digital oscillogram —— Display data in the form of pulses or groups of digital lines .
Three dimensional graphics —— On the front panel ActiveX Display three-dimensional data on the three-dimensional diagram of the object .
（2）abVIEW The readable and writable file formats mainly include ： text file 、 Binary 、 Data record file .
（3）LabVIEW Medium “ file I/O” The sub selection board has multiple file operation functions （ Such as writing / Read spreadsheet file 、 write in / Read text file 、 write in / Read binary 、 write in / Read data record file, etc ）, Reasonable selection will realize new construction 、 open 、 close 、 read / Write 、 Delete 、 Copy 、 Move and other file operations .

The design idea of a sauce ：

Follow the sauce step by step ！

Waveform generation

First, the module of waveform generation is realized .

The waveform generation module is opened according to the following steps ：

Next, we create an enumeration constant . set an option ： Sine wave 、 Triangle wave 、 Custom waveform, etc :

Right click to set properties ：

Then establish a conditional structure , Connect the enumeration constant to the branch selector .

Next, we will show the schematic diagram of each waveform generation one by one .

== white Gaussian noise ：==

== Sine wave ：==

== square wave ：==

== Uniform white noise ：==

== Sawtooth wave ：==

== Triangle wave ：==

== Custom formula ：==

Parameter display

Next, display parameters 🧒

The control we use here is == Statistics ==, His opening method is as follows ：

Then connect according to the following figure ：

Waveform display

Create a waveform chart after the window after the waveform generation in the first step to realize the image ：

We need to add a program stop button , Connect to cycle condition .

So far, the waveform creation and display have been completed ！

file save

Next we save the file ！

First introduce the basic steps ：

Just follow this order , You can save the waveform .

The location of these controls is ：

We use conditional structure to save waveform files , Select the above enumeration constant as the branch selection condition .

Schematic diagram is as follows ：

== white Gaussian noise ：==

== Custom formula ：==

== Sawtooth wave ：==

== Sine wave ：==

== square wave ：==

== Uniform white noise ：==

== Triangle wave ：==

Innovation and interface

A sauce's innovation time ！

Look at the interface designed by ajiang ：

summary

End of the flower ！

If you like this article or feel helpful , Give a sauce == Three companies support == Well ！