I have a small table-like platform with two legs. Underneath each, I need to measure the amount of force. I want to use the difference between the two force measurements to estimate the platform's center of gravity.
What's a good sensor to use for this? Looking through suppliers Digikey, all the sensors that can handle a large amount of sustained force are either enormously expensive or way too large. Is there another way to measure force without bulky discrete sensors?
As a cheaper alternative, I was thinking of placing the platform on a low-profile seesaw, with a rotary potentiometer at the fulcrum, and springs under either end. The seesaw would tilt in proportion to the offset of the platform's center of gravity, and this could be measured with the potentiometer. It could do the same measurement as a $200 force sensor at a fraction of the cost. The only problem is that most potentiometers distribute their range of values across 360 degrees, whereas I need all those values within the range of 1 degree.