07-09-2010 01:47 PM
I will be conducting particle image velocimetry experiments on a rotating pump. A camera needs to take multiple pictures of the pump only when it is at a certain orientation. The pump will be rotating somewhere around 5000 RPM, and an encoder will transmit a pulse via TTL once every revolution. The camera/laser setup receives via TTL and can only operate at less than 15 Hz, so I need to build a setup that can receive this high frequency signal from the encoder, reduce it to the maximum frequency allowed by the camera, then output to trigger the camera. The system should be operated from a laptop computer.
I know I'm a little foggy on the technical details, but I'm hoping someone can give me an idea of what hardware (chassis, modules, controller) I will need. Thanks for any help.
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07-12-2010 09:19 AM
Hello JD_PUME,
Do you already have a camera in mind? Is the 15Hz limited by the laser?
If you dont have a specific camera in mind, I would suggest reading
Choosing the Right Camera Bus
http://zone.ni.com/devzone/cda/tut/p/id/5386
And typically, CameraLink cameras offer the best I/O synch.
You can use the link below to find out a list of cameras that we support
Industrial Camera Advisor
http://sine.ni.com/apps/utf8/nipc.specs?action=search&asid=1102
However, that would require you to have PCI/PCIe slot on your laptop. Other option would be to use our smart cameras such as 1722/1742 etc
Hope this helps.
07-12-2010 11:32 AM
Thank you for the help, Andy.
All I need the NI setup to do is receive a TTL signal at a high frequency, remove excess pulses to produce a lower frequency TTL signal, then output this signal through a coaxial cable. Apparently we have other hardware/software that takes care of the camera and laser from there. Also, laptop control is no longer necessary. I hope I'm getting closer to enough information.
07-13-2010 09:25 AM
Depending on how fast you wish to sample and how much resolution you would want, we have different family of cards that you can choose from.
M Series
07-13-2010 10:29 AM
Thank you, this is very helpful.