This presentation discusses data acquisition systems and LabVIEW. It introduces data acquisition, the components of a data acquisition system including sensors, signal conditioning equipment, data conversion and processing. It describes the basic block diagram of a data acquisition system and the components within it. It also discusses National Instruments data acquisition hardware options, driver and application software, and how to perform real-time data acquisition using LabVIEW. Examples of measurement applications and advantages/disadvantages of data acquisition systems are provided.

1. DEPARTMENT OF ELECTRICAL AND ELECTRONICS
ENGINEERING
BACHELOR OF TECHNOLOGY ELECTRICAL ENGINEERING
2ND PRESENTATION
COURSE: EEE INSTRUMENTATION
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2. PRESENTED BY
 ADU-BUABENG DOMINIC
 REUBEN TSEY
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DATA ACQUISITION
WITH LABVIEW
2015

4. PRESENTATION OUTLINE
 INTRODUCTION TO DAS/DAQ
 COMPONENTS OF DAS/DAQ
 BLOCK DAIGRAM OF DAS/DAQ
 COMPONENTS OF THE BLOCK DAIGRAM
 DAQ/DAS HARDWARE
 NATIONAL INSTRUMENTS DAQ HARDWARE OPTIONS
 DRIVER AND APPLICATION SOFTWARE
 REAL-TIME DATA ACQUISITION WITH LABVIEW
 MEASUREMENT APPLICATION
 ADVANTAGES/DISADVANTAGES OF DAS/DAQ
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5. INTRODUCTION TO DAS/DAQ
 Electronics instrumentation and measurement.
 It is used to collect data from the real world physical conditions
and converting the resulting samples into digital numeric values.
 It is form of treating data.
 Data Acquisition system includes different tools and technology
that are designed to accumulate data.
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6. COMPONENTS OF DAS/DAQ
 SENSORS
 SIGNAL CONDITIONING EQUIPMENT
 DATA CONVERTION
 DATA PROCESSING
 MULTIPLEXING
 DATA HANDLING
 ASSOCIATED TRANSMISSION, STORAGE AND DISPLAY DEVICE
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7. BLOCK DAIGRAM OF DAS/DAQ
RECORDER
DIGITAL
DISPLAY
MAGNETIC
TAPE
COMPUTER
A/D
C
O
N
V
E
R
T
E
R
TRANSDUCER 1
TRANSDUCER 2
TRANSDUCER 3
TRANSDUCER 4
SIGNAL
CONDITIONING 1
SIGNAL
CONDITIONING 2
SIGNAL
CONDITIONING 3
SIGNAL
CONDITIONING 4
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8. COMPONENTS OF THE BLOCK
DAIGRAM
 TRANSDUCER – It convert physical quantity to electrical
quantity
 SIGNAL CONDITIONING UNIT – It is the stage of
filtering, amplification and modification.
 MULTILEXING UNIT – It accept many signals and gives a
single output.
 A/D CONVERTER UNIT – It convert analog data to digital
data for easy processing and transmission
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9. COMPONENTS OF THE BLOCK
DAIGRAM CONT’D
 DISPLAY AND RECORDER DEVICE – Data is displayed in
suitable form in order to monitor the input signals.
Eg – oscilloscope, numerical display etc.
Recorder device – data can be stored either permanently or
temporary. Eg – optical recorder, ultraviolent recorder etc.
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10. DAQ/DAS HARDWARE
Data acquisition hardware acts as the interface between the computer and
the outside world.
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It primarily functions as a device that DIGITIZES incoming ANALOG SIGNALS
so that the computer can interpret them
OTHER FUNCTIONALITIES
Analog input/output Digital input/output
Counter/timers Multifunction

11. NATIONAL INSTRUMENTS DAQ HARDWARE
OPTIONS
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12. DAQ HARDWARE CONT’D
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NI USD – 6003 8 analog input, 10
KS/s; 16 bit resolution, low – cost
multifunction DAQ for basic
quality measurement

13. DRIVER AND APPLICATION SOFTWARE
DRIVER SOFTWARE
 Software transforms the PC and the data acquisition hardware into a
complete data acquisition, analysis, and presentation tool.
 Driver software is the layer of software for easily communicating with
the hardware
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APPLICATION SOFTWARE
Application software adds analysis and presentation capabilities to
driver software
NI offers three development environment software products for
creating complete instrumentation, acquisition, and control
applications
LABVIEW with graphical programming methodology
LABWINDOWS/CVI for traditional C programmers
MEASUREMENT STUDIO for Visual Basic, C++, and .NET

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DAQExpress NI has introduced a configuration-based software environment
where programming is no longer a requirement. Using DAQExpress, you
can make interactive measurements with NI Express technology.
APPLICATION SOFTWARE CONT’D

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REAL-TIME DATA ACQUISITION WITH
LABVIEW

17. MEASUREMENT APPLICATION
 The DAQ ASSISTANT, included with NI-DAQmx, is a
graphical, interactive guide for configuring, testing, and
acquiring measurement data
 DAQ ASSISTANT is completely menu-driven
 Individuals makes fewer programming errors and drastically
decrease the time from setting up your data acquisition system
to taking your first measurement
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18. ADVANTAGES OF DAS/DAQ
 Improved data access to users through use of host and query
languages
 Reduced updating errors and increased consistency
 Reduced data redundancy
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19. DISADVANTAGES OF DAS/DAQ
 Initial training required for all programmers and users
 Damage to database affects virtually all applications programs
 Database systems are complex, difficult, and time-consuming to
design
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20. THANK YOU
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