- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page
modal analysis
pwb
01-30-2009 01:45 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
I am planning a 8 to 16 channel modal test set up:
cDAQ chassis 9172
several NI-9234
Labview with sound & vibration
and of course all the IEPE accelerometers and test hammer, cables etc.
Some questions:
A. can the NI-9234 manage the signal from the test hammer? (force transducer, +-5V output signal, 20-30V and 2-20ma constant current input)
B. are there any better USB module (for this chassis) that would suit the test hammer?
C. are there any better overall hardware solutions, for example a single USB DAQ that can take acceleroemeter sensors in multi simulataneous channels, and the test hammer input?
dsb@NI
01-30-2009 09:06 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
A. The 9234 module is well suited for force hammer signal conditioning.
B. The 9233 is another module that supports IEPE signal conditioning, but the 9234 is a strong recommendation based on the fact that it has programmatic coupling and IEPE which allows for more flexibility.
C. A PXI solution would provide the best measurement quality with the most flexibility (programmatic configuration) and scalability (room to grow). The 4498 module has 16 input channels with gain and all the other usual features for DSA hardware. The 4462 is a four channel device that offers exceptional dynamic range. The DSA devices for PXI have more capabilities than their cDAQ/USB counterparts. I encourage you to check out (http://www.ni.com/soundandvibration/), and you can evaluate the features and cost of the various platforms and modules to see which solution has the most value for you.
With LabVIEW and the Sound and Vibration Measurement Suite, you will find that there are many examples that should help you get started with impact testing and measuring frequency response functions.
Thanks for using the discussion forums, and good luck!
NI Sound and Vibration
07-13-2009 08:20 PM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
I think this is what you need.
National Instruments recently announced a new portable bus-powered dynamic signal acquisition (DSA) module and a suite of vibration sensors that are ideal for making high-accuracy vibration measurements required for noise, vibration and harshness (NVH) and machine condition monitoring applications.
http://sine.ni.com/nips/cds/view/p/lang/en/nid/206843
