Fiber optic vibration sensor

Hello all
I am planning to design a vibration sensor using fiber optical cables as sensors and monitor vibrations of beams.
my idea is to fix a led at one end and a photodiode/ldr at the other end of the cable and measure the variations in signal with different amplitudes of vibration with an arduino.
I am really confused as to which type of fiber optic cable to use for this project. I even made a futile trip to the market which left me even more confused. Can someone please suggest me a suitable cable and connectors for this purpose.
Thank You :slight_smile:

A Google search for "intensity-based fiber optic vibration sensor" turns up all kinds of academic papers that might be of help.

Hi

We use a variety of fiber optic cables. I'm not too clued up on the specs other than the list below:

Single Mode Fiber Optic Cable

  • detects movement based on 3 fiber optic cables. Light is sent down two of the cables and the two light signals compared to each other and the result returned on the 3rd fiber. (Interferometer) Detects problem areas within 150m over a 40Km range.

There are some detection systems that we have that have multimode cables and can detect up to 6m accuracy on a 15Km cable.

Best regards

Andre

I'ved used these guys for a project.
http://thefiberopticstore.com/FOS-mainpage.htm

There are lots of resources to assist you in selecting plastic fiber.

Ray