Implementing an external glass bottle pressure system

Projects General Guidance
1

Hi,

I am trying to develop a system that can measure the external glass bottle pressure generated on a conveyor.

I created a solid plastic bottle like this:

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I called it "probe bottle".

So inside there is an Arduino Nano 3.0 connected to an accerometer sensor to measure impact force between bottles during movements on the conveyor.

I need now some guidance to implement a system that can measure continuous pressure on the external surface of the probe bottle during all trip.

There is someone that can guide or help me?
Many Thanks to All!

2

Strain gages can indicate stresses (deformation) on the bottle exterior.

3

And How?
Are you sure I can use strain gages on the external of the glass? The external scratches can destroy the strain gages...

4

My assumption was that you would use the plastic probe bottle. The gages could be bonded to the inside surface. I figure that if you can put a Nano and accel in the probe bottle you have access to the inside surface.

5

groundfungus:
My assumption was that you would use the plastic probe bottle. The gages could be bonded to the inside surface. I figure that if you can put a Nano and accel in the probe bottle you have access to the inside surface.

Good assumption but the plastic bottle is a really solid, it is fully plastic, not empty and it has a bottom access to insert the electonic components...
But your idea is a great one idea!

6

Can I use one of this:

Interlink Electronics FSR 402 Force Sensing Resistor

or

Sposta il mouse sull'immagine per eseguire lo zoom Ne hai uno da vendere? Vendine uno uguale Dettagli su BF350-3 AA BF350 precision resistor strain gauge pressure load cell

7

The second link (bonded strain gage) is what I suggested. A bonded gage will show deformation even if the force is not directly on the gage, which the force sensing resistor will not. The gage(s) will need an excitation voltage and amplification in order to be measured by the Nano. There is much information on the net on interfacing strain gages to Arduino. Calibration can be done by applying known forces to the bottle

8

a sealed vessel will increase in pressure with a decrease in volume.

at the same time, a sealed vessel will increase in pressure with an increase in temperature.

I would put in an absolute pressure sensor and a temperature sensor.
that way, you can correct for pressure by allowing for temperature changes.

9

This might work, i guess you could cut it up into smaller areas or get the co to custom make you some.