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Fluke ii900 Sonic Industrial Imager
The first industrial acoustic camera featuring Fluke SoundSightTM Technology
Acoustic Imaging Basics & Applications
1
What is acoustic sound imaging?
2Copyright Sept 2019 Fluke Corporation
What is acoustic sound imaging?
• A technique to create an image of the scene based on the sounds in the scene
• The sound image is then overlaid onto a visible image 3Copyright Sept 2019 Fluke Corporation
4
Acoustic Imaging vs. Conventional Ultrasonic Tools
Copyright Sept 2019 Fluke Corporation
Acoustic Imaging vs Conventional Ultrasonic Tools
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Acoustic Imaging vs Conventional Ultrasonic Tools
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Practical considerations in use
7Copyright Sept 2019 Fluke Corporation
Practical considerations
• Reflection
• Diffraction (direction of sound)
• Noise - Frequency selection
8Copyright Sept 2019 Fluke Corporation
Practical considerations
9
Does the sound spot look right?
(For example, is it on a reasonable sound source or a hard floor?)
Reflections
Does the it move when you move?
If yes, then it is a reflection.A B C
D E F
Always move to confirm location of sound sourceCopyright Sept 2019 Fluke Corporation
Practical considerations
10
Confirming sound source
Reflections
Copyright Sept 2019 Fluke Corporation
Echoes / Reflections
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Practical considerations
12
Always move to confirm location of sound source
Direction
Copyright Sept 2019 Fluke Corporation
Practical considerations
• In the ii900 the signal or sound of interest to us is very often in the high frequency range.
13
Noise
• A high pressure leak will have a wide frequency spectrum. In a noisy factory there is likely to be a lot of low frequency sounds. We use the fact that a high pressure leak has sound in the 30-35KHz band.
Copyright Sept 2019 Fluke Corporation
Practical considerations
14
Noise
• Removing the interference from other background noise.
• Ability to pick up the leak at greater distances, as using higher frequencies will require being much closer to the leak.
By filtering all other frequencies we can benefit from:
Select an appropriate frequency band to maximize the signal from the leak. Copyright Sept 2019 Fluke Corporation
Application
Examples
15Copyright Sept 2019 Fluke Corporation
Compressed Air Drop Downs
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Air Compressor Connections
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Air Regulators
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Discharge Valve Connections
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Production Line @ a Food & Beverage Facility
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Boiler Tubes
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Natural Gas Line @ a Steel Mill
Copyright Sept 2019 Fluke Corporation 22
Air Lines on Semi-Trucks
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Nitrogen Leak
Copyright Sept 2019 Fluke Corporation 24
Ammonia Compressor Leak
Copyright Sept 2019 Fluke Corporation 25
Argon Tank Leak
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Duct Leak @ a Coal Plant
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Operation of instrument
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Instrument operation
29
Save
Buttons
On/off switch
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Instrument operation
30
MenuAppears when you touch the screen on the right
Screen
Center readingCan be turned off
General infoBattery, date, time
dB scale color paletteCan be turned off
Amplitude spectrum
Frequency scale
Copyright Sept 2019 Fluke Corporation
Instrument operation
31
Menu
ImageSelect to save image or video
MemoryShows saved images and video
Copyright Sept 2019 Fluke Corporation
Instrument operation
32
Menu
PaletteChoose from 3 different color palettes. Default is Red-Blue
MarkersChoose to display center marker or turn it off
Copyright Sept 2019 Fluke Corporation
FAQ’s
• Leaks can be detected as far as 164 ft.
• You can store up-to 999 images on the device
• The battery life is 6 hours
• The ii900 can visualize more than just compressed air leaks
• We cannot quantify leaks…yet
• The camera does visualize vacuum leaks
• This version of the camera is not ideal for corona discharge Copyright Sept 2019 Fluke Corporation 33