1 / 15

Mine Mapping Choose a Sensor

Mine Mapping Choose a Sensor. See Teacher Guide for printing instructions. Look at an object in the room How far away is that object? How did you measure the distance? How might a robot do something similar?. Opening Activity. Visual estimation Odometry (walk to the object and count steps)

dconner
Download Presentation

Mine Mapping Choose a Sensor

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mine MappingChoose a Sensor See Teacher Guide for printing instructions

  2. Look at an object in the room How far away is that object? How did you measure the distance? How might a robot do something similar? Opening Activity

  3. Visual estimation Odometry (walk to the object and count steps) Measuring tools (meter stick) Opening Activity Humans measure distance by:

  4. Touch Sensor Sound Sensor Light Sensor Ultrasonic Sensor Rotation Sensor (built into motors) Combinations of sensors! Opening Activity Robots can’t read meter sticks. Instead, they use sensors.

  5. Choosing a Sensor How to choose a sensor • Identify what capabilities the sensor needs to have • Test each sensor to see whether it has those capabilities • Choose the best sensor or combination of sensors Sensors Which one (or maybe morethan one) will work best?

  6. Identify Capabilities The sensor needs to… • Detect walls • Detect objects • Give you some information about where those objects are detected • Can you think of more? Things to Look For In order to map the mine, you mustbe able to see the walls and anyother important features

  7. Testing and Evaluation • In this investigation, you will test the different sensors and choose one • What do you need to evaluate? • Functionality • Does it work? • Reliability • Is it going to work every time? • Accuracy • Does it give good data? • Suitability to environment • Will it work in a mine?

  8. The Sensors View Mode Choose Sensor:Technical Review

  9. Touch Sensor • Detects physical contact • Tells you: • 1 if touched • 0 if not touched Poke, Poke? The cross axle probe inserted intothe end of the Touch Sensor contactincreases its effective range

  10. Sound Sensor • Detects Sound • Tells you: • Amplitude (volume) of sound • Low numbers = quiet • High numbers = loud • Can be confused by sounds of different frequencies (pitch) Listen Carefully The Sound Sensor can detect many sounds, from gentle vibrations to jarring collisions

  11. Light Sensor • Detects light intensity • Tells you: • The intensity of light detected • Low numbers = dark • High numbers = light • Light on the front can be turned on or off Light the Way The light sensor in Reflected Light modeshines its own light out and measuresthe amount that bounces back

  12. Ultrasonic Sensor • Detects distance • Tells you: • Distance to a surface or object in front • Indicates a distance in cm or inches Ro-Bat The Ultrasonic Sensor uses the same basic principle for detecting distance as cave-dwelling bats do.

  13. Rotation Sensor • Detects rotation of the motor axle • Tells you: • Amount the axle has rotated in degrees or full rotations • Rotational position of an attached piece* • Linear position of an attached piece* Rotato Chips The Rotation Sensor is built into theInteractive Servo Motors * If you also know the initial position and how the piece is attached, you can calculate this

  14. View Mode • Displays a sensor value on the NXT’s LCD screen • Updates continually View Mode The View Mode on the NXT allows youto read sensor values without having towrite a program first

  15. Summary • Your robot will need to use sensors to “see” important features inside the mine • Detect walls • Detect objects • Report “where” things are • You must select an appropriate sensor or combination of sensors for the mine mapping task • You will use the NXT’s View Mode to monitor sensor values while experimenting

More Related