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Adquisicion de datos en Labview

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Re: Adquisicion de datos en Labview

Notapor gus » Dom, 15 Abr 2012, 12:32

Data Acquisition and Instrument Control in LabVIEW

gus
 
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Registrado: Jue, 29 Mar 2012, 19:33


Re: Adquisicion de datos en Labview

Notapor gus » Dom, 15 Abr 2012, 12:35

Data Acquisition and Signal Conditioning Course Manual



Lesson 1
Overview of Transducers, Signals, and Signal Conditioning
A. DAQ System Overview ........................................................................................1-2
B. Transducers...........................................................................................................1-3
C. Signals...................................................................................................................1-4
D. Signal Conditioning Overview .............................................................................1-12
Summary.....................................................................................................................1-17
Lesson 2
Data Acquisition Hardware and Software
A. DAQ Hardware Overview ....................................................................................2-2
B. Components of a DAQ Device .............................................................................2-7
C. Configuration Considerations ...............................................................................2-13
D. Grounding Issues ..................................................................................................2-19
E. Types of Measurement Systems ...........................................................................2-21
F. Measuring Signal Sources ....................................................................................2-26
G. DAQ Software ......................................................................................................2-33
H. NI-DAQ ................................................................................................................2-34
I. Measurement & Automation Explorer .................................................................2-36
J. Overview of NI-DAQmx VIs ...............................................................................2-49
K. NI-DAQmx Task State Model..............................................................................2-53
Summary.....................................................................................................................2-58
Lesson 3
Triggering
A. Triggering .............................................................................................................3-2
Summary.....................................................................................................................3-11
Contents
Data Acquisition and Signal Conditioning iv ni.com
Lesson 4
Analog Input
A. Analog Input .........................................................................................................4-2
B. Anti-aliasing Filters ..............................................................................................4-7
C. Using the DAQmx Read VI..................................................................................4-11
D. DAQ Device Architectures ...................................................................................4-17
E. Multiple-Point (Buffered) AnaIog Input...............................................................4-23
F. Continuous Acquisition Flowchart .......................................................................4-33
Summary.....................................................................................................................4-49
Lesson 5
Signal Conditioning
A. Overview of Signal Conditioning .........................................................................5-2
B. Signal Conditioning Configuration.......................................................................5-3
C. Signal Conditioning Functions .............................................................................5-11
D. Filtering.................................................................................................................5-21
E. Isolation ................................................................................................................5-33
F. Transducer Conditioning ......................................................................................5-36
G. Thermocouples......................................................................................................5-37
H. Strain .....................................................................................................................5-46
I. Strain Gauge .........................................................................................................5-47
J. Signal Conditioning for Strain Gauges.................................................................5-53
K. Strain Gauge Equations ........................................................................................5-56
Summary.....................................................................................................................5-64
Lesson 6
Signal Processing
A. Discrete Fourier Transform (DFT) and Fast Fourier Transform (FFT)................6-2
B. Frequency Spacing and Symmetry of the DFT/FFT ............................................6-6
C. Power Spectrum....................................................................................................6-11
D. About Spectral Leakage and Smoothing Windows ..............................................6-19
E. Characteristics of Different Types of Window Functions ....................................6-23
F. Determining Which Type of Window To Use......................................................6-30
G. Filtering.................................................................................................................6-36
H. Ideal Filters ...........................................................................................................6-37
I. Practical (Nonideal) Filters ...................................................................................6-39
J. Advantages of Digital Filters over Analog Filters................................................6-41
K. IIR and FIR Filters ................................................................................................6-42
L. Infinite Impulse Response Filters .........................................................................6-44
M. IIR Filter Comparison ...........................................................................................6-50
N. Transient Response of IIR Filters .........................................................................6-52
O. Finite Impulse Response Filters............................................................................6-60
Summary.....................................................................................................................6-62
Contents
© National Instruments Corporation v Data Acquisition and Signal Conditioning
Lesson 7
Analog Output
A. Analog Output Architecture..................................................................................7-2
B. Using the DAQmx Write VI.................................................................................7-4
C. Multiple-Point (Buffered) AO VIs .......................................................................7-10
D. Finite Buffered Generation ...................................................................................7-11
E. Continuous Buffered Generation ..........................................................................7-21
Summary.....................................................................................................................7-32
Lesson 8
Digital I/O
A. Digital Signals.......................................................................................................8-2
B. Digital I/O .............................................................................................................8-4
Summary.....................................................................................................................8-12
Lesson 9
Counters
A. Counter Signals.....................................................................................................9-2
B. Counter Chips .......................................................................................................9-5
C. Counter I/O ...........................................................................................................9-6
D. Edge Counting ......................................................................................................9-8
E. Advanced Edge Counting .....................................................................................9-12
F. Pulse Generation ...................................................................................................9-17
G. Pulse Measurement ...............................................................................................9-25
H. Frequency Measurements .....................................................................................9-30
I. Position Measurement...........................................................................................9-35
Summary.....................................................................................................................9-40
Lesson 10
Synchronization
A. Explicit State Transitions......................................................................................10-2
B. Single Device Synchronization.............................................................................10-8
C. Multiple Device Synchronization .........................................................................10-29
Summary.....................................................................................................................10-38
Appendix A
A. Theory of Common Transducers ..........................................................................A-2
B. Analog I/O Circuitry .............................................................................................A-8
gus
 
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Registrado: Jue, 29 Mar 2012, 19:33


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