Inductive Proximity Switch Build Help

[andrewvanh]

I am trying to put together an inductive proximity detector for Rail Wheel detection. Currently we use an oscillator connected to a coil. We then count pulses on the oscillator and measure a detect when coil saturation changes the pulse.

There are similar industries that use NAMUR inductive switches.

The only information I have found on these is at http://www.tektron.ie/namur1.htm. I would like to build a sensor similar to this and see about how it functions. Anyone familiar with resonators more so than I that can provide some input into where to start?

Thanks
Andrew

 

[anorlunda]

It seems that you answered your own question. Both as to the principle of operation, and a description of a refined design.

What more do you want from us?