A robot technique with flex sensor

There are so many creative ways to use sensors in robot application. The idea was having sensor as an receiver, whenever they receive input , they would transmit information in the form of electricity current two their processor. For example, two flex sensor can be used as wall-locating divides like in the picture. They are glued to the front of the bot, when ever it hit the wall, the sensors would be bended and give out a signal for the bot to turn to other way.