[Halld-pid-upgrade] sensors

[Shepherd, Matthew]

John,

John and I made a brief sketch of what we think are minimal sensor requirements.

Accelerometers, 8 total:  2 each on the
* truck bed
* outer crate
* inner crate
* bar box

These should probably be in the fore and aft positions of each object.


Bar box:

* N2 flow (Tom has this already)
* N2 pressure - this gauge pressure is very low..  Tom has a spec


Crate:

* Pressure and flow for horizontal air spring system
* Pressure and flow for vertical air spring system

For the flow above, we expect it to be zero/small.  Only leaks in the system should generate appreciable flow.  Tom's gauge for the bar box will probably work

The pressures in the air spring system are typically 25 psi.  Something that measures on a scale of 0 - 50 psi would be good.


Trailer environment:

Temperature
Barometric pressure
O2 content (useful to monitor ODH hazard)


Outside environment (necessary?):

Temperature
Barometric pressure


Comments/suggestions?

I think John was going to follow this up with an email to you on some specific models we found.  The key thing is getting something that is easy to interface all together.

Matt

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Matthew Shepherd, Professor
Department of Physics, Indiana University, Swain West 117
727 East Third Street, Bloomington, IN 47405

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