Obstacle Detection Introductory Presentation Opening Activity If you

Obstacle Detection Introductory Presentation

Opening Activity If you were blindfolded, what senses would you use to find things in the room?

Opening Activity You would probably use your hands to feel around to find things by touch Your robot can detect objects with “touch” by using its Touch Sensor

Opening Activity If you were a bat, you would not have to run into things, or touch them, to find them (sound) Thesignal soundreturns signals A bat tobounce the sends bat, off sound telling objects signals it the in distance the out surrounding to the object. area

Opening Activity Your robot can also use sonar to send ultrasonic sound waves out and detect objects This sensor is called the Ultrasonic Sensor

Discussion Questions Why does the Ultrasonic Sensor have two openings in the front ? One opening is for sending out the sound waves One opening is for receiving the returning sound waves

Discussion Questions What is the difference between the Ultrasonic Sensor and the Touch Sensor ? The Ultrasonic Sensor does not have to touch The Touch Sensor must touch an object anorder object detect in toto detect it it

Review In previous activities we told the robot to “wait” for different conditions. Wait for the robot to “hear” a sound Wait for the Rotation Sensor to read 720 degrees

Preview Then Nowwe wewillwait tell the for the robot Ultrasonic to wait for Sensor the Touch Sensor toan beobject pressed to come near

Preview Don’t forget that the Ultrasonic Sensor can read both inches and centimeters, so check which one you have selected.

Preview As you complete the activity, think about when you would want to use the Ultrasonic Sensor or the Touch Sensor.

Good Luck! Now you have the necessary knowledge to get started in the Obstacle Detection Activity.