Hardware and Software in Virtual Instrumentation,VI for Test ,Controland Design,VI in Engineering.pdf

Description on the concepts of
1.Hardware and Software in Virtual Instrumentation
2.Virtual Instrumentation for Test ,Control and Design
3.Virtual Instrumentation in Engineering

1. HARDWARE AND SOFTWARE IN VIRTUAL
INSTRUMENTATION
RoleofhardwareinVI
•Input/Outputplaysacriticalroleinvirtual
instrumentation.
•Toacceleratetest,controlanddesign,
I/Ohardwaremustberapidlyadaptableto
newconceptsandproducts
•Virtualinstrumentationdeliversthis
capabilityintheformofmodularitywithin
scalablehardwareplatforms.

2. •Virtualinstrumentationissoftware-based;
•Laptopsanddesktopcomputersprovideanexcellent
platformwherevirtualinstrumentationcanmakethemost
ofexistingstandardssuchastheUSB,PCI,Ethernet,and
PCMCIAbuses.
RoleofSoftwareinVI
•Softwareisthemostimportantcomponentofavirtual
instrument.
•Withtherightsoftwaretool,engineersandscientistscan
efficientlycreatetheirownapplicationsbydesigningand
integratingtheroutinesthataparticularprocessrequires.
•Youcanalsocreateanappropriateuserinterfacethatbest
suitsthepurposeoftheapplicationandthosewhowill
interactwithit.

3. •Animportantadvantagethatsoftware
providesismodularity.
•Whendealingwithalargeproject,engineers
andscientistsgenerallyapproachthetaskby
breakingitdownintofunctionalsolvable
units.
•Wecandesignavirtualinstrumenttosolve
eachofthesesubtasks,andthenjointhem
intoacompletesystemtosolvethelarger
task.

4. Layers of virtual instrumentation
software

5. Application software layer
•This is the primary development environment for
building an application. It includes software such
as LabVIEW, LabWindows/CVI (ANSI C),
Measurement Studio (Visual Studio programming
languages), Signal Express and VI Logger.
Testexecutiveanddatamanagementsoftware
layer.
Thislayerofsoftwareincorporatesallofthe
functionalitydevelopedbytheapplicationlayer
andprovidessystem-widedatamanagement.

6. Measurement and control services software
•Equivalent to the I/O driver software layer
•This software connects the virtual instrumentation
software and the hardware for measurement and
control
•It includes intuitive application programming
interfaces, instrument drivers, configuration tools,
I/O assistants and other software
•This software offers optimized integration with
both hardware and application development
environments.

7. VIRTUAL INSTRUMENTATION FOR
TEST, CONTROL AND DESIGN
VirtualInstrumentationforTest
•Itcombinesrapiddevelopmentsoftwareandmodular,
flexiblehardwaretocreateuser-definedtestsystems.
•Virtual instrumentation delivers user-defined instruments
and customizable hardware for test systems:
Intuitivesoftwaretoolsforrapidtestdevelopment
Fast,precisemodularI/Obasedoninnovativecommercial
technologies
APC-basedplatformwithintegratedsynchronizationfor
highaccuracyandthroughput

8. User-defined instruments and
customizable hardware for test systems.

9. Virtual Instrumentation for Industrial I/O and
Control
•PCs and PLCs both play an important role in control
and industrial applications.
•PCs bring greater software flexibility and capability,
•PLCs deliver outstanding ruggedness and reliability.
•as control needs become more complex, there is a
recognized need to accelerate the capabilities while
retaining the ruggedness and reliabilities.

10. •TheProgrammableAutomationControllers
(PACs)providemultidomain functionality
(logic,motion,drivesandprocess)andthe
conceptofPACsupportsmultipleI/Otypes.
Logic,motionandotherfunctionintegrations
arearequirementforincreasinglycomplex
controlapproaches.
PACsdeliverPCsoftwareflexibilitywithPLC
ruggednessandreliability.
•LabVIEWsoftwareandrugged,real-time,
controlhardwareplatformsareidealfor
creatingaPAC.

11. Virtual Instrumentation for Design
•Thesamedesignengineersthatuseawide
varietyofsoftwaredesigntoolsmustuse
hardwaretotestprototypes.
•thereisnogoodinterfacebetweenthedesign
phaseandtesting/validationphase,which
meansthatthedesignusuallymustgo
throughacompletionphaseandentera
testing/validationphase.

12. Simulation test plays a critical role in
the design and manufacture.

13. VIRTUAL INSTRUMENTATION IN THE
ENGINEERING PROCESS
Research and Development
•Withvirtualinstruments,wecanquicklydevelop
aprogram,takemeasurementsfrom an
instrumenttotestaprototypeandanalyze
results.
•Thedemandingrequirementsofresearchand
development(R&D)applicationsrequire
seamlesssoftwareandhardwareintegration.
•virtualinstrumentationsoftwaremakes
integrationsimple.

14. Development Test and Validation
•With the flexibility and power of virtual
instruments, one can easily build complex test
procedures
•code reuse. We develop code in the design
process and then plug these same programs
into functional tools for validation, test or
manufacturing.

15. Manufacturing Test
•Decreasingtesttimeandsimplifying
developmentoftestproceduresareprimary
goalsinmanufacturingtest.
•Virtualinstrumentscombinedwithpowerful
testmanagementsoftwaredeliverGraphical
SystemDesignhighperformance.
•Virtualinstrumentsofferalltheseadvantages
byintegratingfeaturessuchasalarm
management,historicaldatatrending,
security,networking,industrialI/Oand
enterpriseconnectivity.