I want to make an inflatable seat that is electronically controlled. I am specifically looking to be able to estimate the level of inflation of an airbag using small electronic sensors. The airbag is to be filled using a DC pump, and a solenoid will be used to control exhaust.
I have used the term "level of inflation" because I am using and airbag that somebody is sitting on, so the air will be getting compressed by the persons weight and movement. This will obviously cause variations in pressure and volume. In addition, I would like to use this measurement/information to inflate the airbags to the same levels at a later date. However, I won't necessarily be starting with a completely deflated bag every time I inflate the bag to this measured level.
I hope this makes some sense - apologies if it's too convoluted. I'm happy to answer further questions.