This chapter deals with basicly, what we did in the 'line tracking' activity. it talks about the techniques that can be useful for the following of a line and detecting/avoiding objects. One of the listed techniques in this chapter is the atching and usage of an ultrasonic sensor to detect an edge of a peice of tape on the floor, this is done by putting the sensor around ground level this will allow the subjected robot to locate the edge because there would be a change in hight, or distance as the ultrasonic would 'assume', from the sensor and the object being dettected, in this case namly the surface of he floor, this method works if you use an untra-sonic sensor or the change in the light reflected back from a light sensor, on a darker surface being less and a lighter/more reflective surface being more. This chapter's mainly discussed project's base ideas may be boring (to the exream in some locations) but are quite effective.
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