Shock Sensor Question

[Eric Aos]

I saw some baluf (?) linear transducers specifically designed to go in the
shocks of the new Cadillac's. 

Eric


> Anyone have a brainstorm of an inexpensive shock sensor.
> 
> Linear position sensor are on the order of $180 US per 
> sensor, as you can
> see this gets expensive  for 2 and maybe 4 sensors (front and back).
> 
> I had thought of using a rotary pot, with a  pulley, return 
> spring, you get
> the idea, but from speaking with someone who mentioned they 
> tried something
> similar, they said the rotary pots do not react fast enough for the
> frequencies that the shock moves.  Instead of the Rotary Pot, 
> how about
> interfacing an optical sensor from a PC mouse in its place,  
> does anyone
> have an idea if the mouse optical sensor could be made to 
> react fast enough?
> 
> 
> I have been thinking of maybe a different optical approach, 
> but I do not
> know the easiest way to do this.  Maybe a pulsed light / laser, to a
> reflector, measure the round trip time, speed of light should 
> handle any
> frequencies that a shock can move at.  
> 
> Do some of you engineers out there have any good ideas that 
> we could tackle
> to try to build a cheap way to measure shock position on a 
> Drag race car.
> 
> Thanks
> 
> Steve F
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