Chapter 42Adding the Sense of Touch
A sure way to detect objects is to make physical contact with them. Contact is the most common form of object detection, and it’s also the cheapest to implement—often with just an inexpensive switch. Touch sensing can be used on the base of a robot for when it’s crisscrossing the living room carpet, or on arms and grippers, to detect when objects have been grasped or even when they’re about to be crushed to smithereens.
This chapter deals with touch-sensing systems, whether it’s a simple switch on the back of the bot so it knows when it’s bumped into something, or artificial “skin” that detects the amount of pressure applied to it.
This chapter deals only with “touch,” your robot making actual contact with ...
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