the virtual instrumentation

7/23/2019 The Virtual Instrumentation

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THE VIRTUAL INSTRUMENTATION

By:

JITHIN K MOHANDAS

ROLL NO : 29

13030476


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WHAT IS VIRTUAL

INSTRUMENTATION?

A virtual instrumentation system is computer

software that a user would employ to develop

a computerized test and measurement system

for controlling from a computer desktop anexternal measurement hardware device and

for displaying test or measurement data

collected by the external device oninstrument-like panels on a computer screen.


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BASIC BLOCK

DIAGRAM

Virtual instrumentation has reached mainstream

acceptance and is used in thousands of applications

around the world in industries from automotive, to

consumer electronics, to oil and gas.


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WHY IS VIRTUAL

INSTRUMENTATION NEESSARY?

Virtual instrumentation is necessary because itdelivers instrumentation with the rapid adaptabilityrequired for todays concept product and processdesign development and delivery. !nly with virtual

instrumentation can engineers and scientists create theuser-defined instruments required to keep up with theworlds demands.

"he only way to meet these demands is to use

test and control architectures that are also softwarecentric. #ecause virtual instrumentation uses highlyproductive software modular $%! and commercialplatforms it is uniquely positioned to keep pace with therequired new idea and product development rate


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THE TEHNOLO!Y O" VIRTUAL

INSTRUMENTS

Virtual $nstrumentation is the use of customizable software and

modular measurement hardware to create user-defined measurement

systems called virtual instruments.

Computer Software

Hardware


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HOW IS IT DI""ERENT "ROM A TRADITIONAL

INSTRUMENT?

&very virtual instrument consists of two parts ' software andhardware. A virtual instrument typically has a sticker price

comparable to and many times less than a similar traditional

instrument for the current measurement task.

A traditional instrument provides them with all software andmeasurement circuitry packaged into a product with a finite list of

fixed-functionality using the instrument front panel. A virtual

instrument provides all the software and hardware needed to

accomplish the measurement or control task. $n addition with a

virtual instrument engineers and scientists can customize theacquisition analysis storage sharing and presentation functionality

using productive powerful software.


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TRADITIONAL INSTRUMENTS (LEFT) AND SOFTWARE BASED

VIRTUAL INSTRUMENTS (RIGHT) LARGELY SHARE THE SAME

ARCHITECTURAL COMPONENTS, BUT RADICALLY DIFFERENT

PHILOSOPHIES


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VIRTUAL INSTRUMENTATION FOR

INDUSTRIAL I/O AND CONTROL

()s and (*)s both play an important role in control andindustrial applications. ()s bring greater softwareflexibility and capability while (*)s deliver outstandingreliability. #ut as control needs become more complex

there is a recognized need to accelerate the capabilitieswhile retaining the reliabilities.

+ulti domain functionality ,logic motion drives andprocess ' the concept supports multiple $%! types.*ogic motion and other function integration is a

requirement for increasingly complex controlapproaches.

oftware tools for designing applications across severalmachines or process units ' the software tools must scaleto distributed operation.


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ON WHICH HARDWARE I/O AND PLATFORMS

DOES VIRTUAL INSTRUMENTATION

SOFTWARE RUN? tandard hardware platforms that house the $%! are important to $%!

modularity. *aptop and desktop computers provide an excellent

platform where virtual instrumentation can make the most of existing

standards such as the /# ()$ &thernet and ()+)$A buses.

for example /# 0.1 and ()$ &xpress


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LAYERS O" VIRTUAL INSTRUMENTATION

Application oftware2 +ost people thinkimmediately of the application software layer. "hisis the primary development environment for

building an application.

"est and 3ata +anagement oftware2 Above theapplication software layer the test executive and datamanagement software layer. "his layer of softwareincorporates all of the functionality developed bythe application layer and provides system-wide data

management.+easurement and )ontrol ervices oftware2 "he

last layer is often overlooked yet critical tomaintaining software development productivity.


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ADVANTA!ES O" VIRTUAL INSTRUMENTS VERSUS

TRADITIONAL INSTRUMENTS

"#$%&'&(y4ou can easily add additional functions such as a filter routine or anew data view to a virtual instrument.

S()*+,$"oday5s personal computers have hard disks that can store dozens ofgigabytes which is an absolute plus if you want to process mass datalike audio or video.

D&-.#+y)omputer monitors usually have better color depth and pixelresolution than traditional instruments. Also you can switch easilybetween different views of the data ,graphical numerical.

)-(-() add-in boards for signal acquisition and software mostly cost afraction of the traditional hardware they emulate.


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DISADVANTA!ES O" VIRTUAL

INSTRUMENTS VERSUS TRADITIONAL

INSTRUMENTSPower consumption

Security

Overall cost.


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APPLICATIONS

ADVANCED SENSING

BIOINFORMATICS GRAPHICAL USER INTERFACES

INTERFACING TECHNOLOGIES

LOCATION-AWARE TECHNOLOGY

MEASUREMENT SYSTEMS

MEMS NEXT GENERATION COMPUTING

NANOTECHNOLOGY

OPTICS

RFID

ROBOTICS SMART CAMERAS

WEB SERVICES

WIRELESS COMMS

WIRELESS NETWORK SENSORS & SOFTWARE


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CONCLUSION

Virtual instrumentation is fueled by ever-

advancing computer technology and offers you the

power to create and define your own system based on an

open framework. "his concept not only ensures that your

work will be usable in the future but also provides the

flexibility to adapt and extend as needs change.

*abV$&6was designed with scientists and engineers in

mind providing powerful tools and a familiardevelopment environment created specifically for the

design of virtual instruments.
http://www.ni.com/labview/whatis/http://www.ni.com/labview/whatis/


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the virtual instrumentation

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