In one current design project, I’m working on an application that requires force sensing with a moderately high dynamic range, but not necessarily high absolute accuracy. That is, I need to be able to see small changes in a fairly large force, but I don't need tight absolute accuracy of the total force measurement. I need to look for changes on the scale of hours or days, so simply ac-coupling is not an option. The fancy strain-gauge units are out of the question due to cost sensitivity of the product, so I looked into force-sensing resistors...
Register or Sign in below to download the full article in .PDF format, including high-resolution graphics and schematics when applicable.