i'm currently working on project that needs an implementation of certain touch/force-presence sensor on human body surface. I want to place the sensor on my backpack shoulder straps, so that the electrical system of my smart backpack will know, whether the backpack is currently being worn or not.
I have already tried to use piezo electric sensor, but it seems like it can only detect an impulse signal; output signal HIGH when a force is momentarily detected, then go LOW even if the force is still detected (only detect the 1st contact).
I'm curious, is there any type of sensor that can detect prolonged contact, so that the sensor will always give HIGH signal as long as the force is detected? Thanks!!
Edit: There's also space constraint, so i need the sensor to be as thin and small as possible