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Vibration Test and Thermal Deformation Monitoring

An engineer from National Instruments gives a quick demo from NIWeek 2012 on their optical sensor interrogator. This is a flexible, modular PXI platform with rapid, secure LabWindows/CVI development, and static and dynamic tests using a single platform. This is an ideal design for portable test and monitoring with an optical sensing for challenging test environments.

Topics:
Data Acquisition Data Acquisition Electronics & Computers Lasers & Laser Systems Monitoring Optics Photonics Sensors Software Test & Measurement

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    Transcript

    00:00:01 hi I'm Nathan I'm an engineer with national instruments and I'm going to be talking about our Optical sensor interrogator today so Optical sensing is really useful because you can have multiple sensors on a single line here you can actually see um probably not from there but there is a small fiber optic line here which has 16 sensors on it um and this requires only one line

    00:00:21 normally that would require 32 wires to do that any the other way so to get a general overview let's go ahead and turn our heat lamp on and put it right up on one of these sensors and we can see on the 3D model our Heat going on we can also put it to a different part and watch as the plane heats up now a lot of people ask how this actually works so let's go into it now

    00:00:49 so we have this General Optical Spectrum here so here we can see the peak reflections of our 16 sensors so these are all the reflections that it sends back so how the optical interrogator actually works is it will send down a laser ranging from 1510 to 1590 nanm and the sensors reflect back a specific wavelength now each sensor is finally tuned to have its own wavelength and

    00:01:14 what it's going to do is if I zoom in here really quick and then Shine the Light on that particular sensor we can see the wavelength Peak change and that change in Peak wavelength corresponds to a change in degrees cels which is how how we actually measure the temperature and you'll see here if we go

    00:01:35 to the temperature plot that it corresponds to an actual change in temperature over here so if we do it one more time we can see that temperature