Sunday, 19 May 2013

LabVIEW


 
Who does not make any spelling mistake? Who does not make any structure mistakes in coding? Who prefer  icon to build a program?
All of these and more can be seen in LabVIEW. LabVIEW stands for Laboratory Virtual Instrument Engineering Workbench. It is a graphical programming language that allows the user to write codes using icons. You may ask yourself a question is LabVIEW better than C language?
Honestly, it is the wrong question to ask. But you can ask which is better for this application or task. If you want to build a measurement system or control system, then NI LabVIEW system design software is a tool that can save you the risk, expense, and inconvenience of building your own from low-level languages like C.
 
The relationship between LabVIEW and C is similar to bread and flour. If you want to make a sandwich, start with bread. If you want to bake a cake, start with flour. Baking bread with flour from scratch can be expensive and time consuming (especially if you just want a quick snack), but when it comes to a cake, flour is essential. Similarly, you might find it challenging to decide which programming language is best for your task. It comes down to using the right tool for the right job.
1.   C Gives You Low-Level Control
  C is often better for applications with tight resources that must be closely managed. Since C is a relatively low-level language, it forces you to consider and specify even the smallest details, such as memory assignments and threads. A good programmer can use this low-level of control to eliminate the overhead in most higher level implementations. At this level, you can also take advantage of target architecture or host operating system properties to achieve greater performance.
 
NI programmers wrote most of the LabVIEW libraries in C or C++ for this reason. Operations like file I/O and analysis are as fast in LabVIEW as they are in C because they are written in low-level languages and optimized for each of the platforms and operating systems that LabVIEW supports.
2.   Efficiency versus Control
At some point, developer efficiency trumps the need for hand-optimized code. Relinquishing a little control to stand on the shoulders of those who have solved similar problems can benefit many projects in terms of quality productivity. Programming languages are constantly progressing toward higher levels of abstraction. This helps you focus on the problem at hand instead of the minutia of the computing.
 
3.   LabVIEW: For Parallel Execution and Real-World I/O
No matter what the implementation language, high-level system design and low-level implementation must inevitably split.
In measurement and control applications, programming is just one task of a system designer. Engineers often don’t have time to keep up with or rewrite old software to support the advancements in computing and measurement hardware, operating systems, and so on. They add value by figuring out how to acquire, manipulate, and present real-world data—not by coming up with new ways to handle memory allocations and thread pools. By using LabVIEW, you can build on top of tested, supported, and maintained libraries of lower level code from NI. Choosing C means you’ll need to implement, support, and maintain your own lower level libraries or purchase them from a vendor (NI offers NI LabWindows ™/CVI software and NI Measurement Studio for this use case).
Syntax-wise, C is optimized for sequential execution of instructions as fast as the CPU can handle them. This is perfect for pure computation, when only one task is being executed and instructions are more basic. The graphical syntax in LabVIEW, on the other hand, is optimized for the parallel execution of tasks that have real-world timing constraints.
labVIEW applications:
LabVIEW is a flexible programming environment that can help you successfully build your unique application, whether you’re taking simple measurements or prototyping with FPGA technology.
   Data Acquisition
  
  Traffic control:
Wheelchair powered by labview:
 
  Robotic
 
Voice command

Post#4
Ali Alshaqaq

Source:

http://www.ni.com

 

 

 

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