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LabVIEW
TM
Sound and Vibration Toolkit
User Manual
LabVIEW Sound and Vibration Toolkit User Manual
April 2004 Edition
Part Number 322194C-01
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© National Instruments Corporation v LabVIEW Sound and Vibration Toolkit User Manual
Contents
About This Manual
Conventions ...................................................................................................................xi
Related Documentation..................................................................................................xii
Chapter 1
Introduction
Sound and Vibration Toolkit .........................................................................................1-1
Toolkit Palettes ..............................................................................................................1-2
Scaling .............................................................................................................1-3
Calibration .......................................................................................................1-3
Limit Testing ...................................................................................................1-3
Weighting ........................................................................................................1-3
Integration........................................................................................................1-4
Generation .......................................................................................................1-4
Vibration Level................................................................................................1-4
Sound Level.....................................................................................................1-4
Octave Analysis...............................................................................................1-4
Frequency Analysis .........................................................................................1-4
Transient Analysis ...........................................................................................1-5
Waterfall Display.............................................................................................1-5
Swept Sine .......................................................................................................1-5
Distortion.........................................................................................................1-5
Single-Tone .....................................................................................................1-6
Front Panel Displays......................................................................................................1-6
Examples........................................................................................................................1-6
Chapter 2
Dynamic Signals
Acquiring and Simulating Dynamic Signals .................................................................2-1
Aliasing............................................................................................................2-3
Time Continuity...............................................................................................2-4
Chapter 3
Scaling and Calibration
Scaling to EU .................................................................................................................3-1
Performing System Calibration .....................................................................................3-3
Propagation Delay Calibration ........................................................................3-3
Contents
LabVIEW Sound and Vibration Toolkit User Manual vi ni.com
Chapter 4
Limit Testing Analysis
Limit Testing Overview ................................................................................................ 4-1
Using the SVT Limit Testing VI................................................................................... 4-3
Chapter 5
Weighting Filters
Purpose of Weighting Filters......................................................................................... 5-1
Psophometric Weighting Filters...................................................................... 5-3
A-, B-, and C-Weighting Filters ....................................................... 5-3
Radiocommunications Weighting Filters ......................................... 5-5
Telecommunications Weighting Filters............................................ 5-6
Applying Weighting Filters........................................................................................... 5-6
Applying Weighting to Time-Domain Data ................................................... 5-8
Standards Compliance ................................................................................................... 5-9
A-, B-, and C-Weighting Filters...................................................................... 5-9
ANSI Standards ................................................................................ 5-9
ISO/IEC Standard ............................................................................. 5-10
Radiocommunications Weighting Filters........................................................ 5-10
Telecommunications Weighting Filters .......................................................... 5-10
Performing A-Weighted Sound Level Measurements...................... 5-11
Applying Weighting to an Octave Spectrum .................................................. 5-12
Errors Due to Uniform Corrections .................................................. 5-12
Applying Weighting to an FFT-Based Spectrum ........................................... 5-13
Chapter 6
Integration
Introduction to Integration............................................................................................. 6-1
Implementing Integration .............................................................................................. 6-3
Challenges When Integrating Vibration Data................................................. 6-5
DC Component ................................................................................. 6-5
Transducers....................................................................................... 6-5
Implementing Integration using the Sound and Vibration Toolkit ................. 6-5
Time-Domain Integration.............................................................................................. 6-6
Single-Shot Acquisition and Integration......................................................... 6-6
Continuous Acquisition and Integration ......................................................... 6-7
Frequency-Domain Integration ..................................................................................... 6-11
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