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Datalogging Basics

Datalogging Basics. Malli Travis Dunbar College Prep Academy mtravis@lubbocksid.org. Why use datalogging in class?. Hands on aspect enables students to watch in real time the results of any experiment they perform

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Datalogging Basics

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  1. Datalogging Basics Malli Travis Dunbar College Prep Academy mtravis@lubbocksid.org

  2. Why use datalogging in class? • Hands on aspect enables students to watch in real time the results of any experiment they perform • Advances in technology allow students to spend less time plotting data and more time on critical thinking skills (21st Century Skills…hmmm?) • Open ended nature of experiments promote scientific inquiry

  3. What is datalogging? The process of collecting information for later analysis Environmental

  4. Biological

  5. Technological – used to measure performance

  6. Testing

  7. Vocabulary • Data sets • Collection of data that has been recorded by a particular sensor

  8. Vocabulary • Resolution • High frequency • Low frequency

  9. Vocabulary • Sampling frequency

  10. Vocabulary • outliers

  11. Vocabulary • Data influence

  12. Additional Terms • Maximum/minimum values • Trend • Slope • Axis (horizontal and vertical) • Scale

  13. NXT Parameters • 4 separate sensors (light, touch, sound, ultrasonic) • 3 built in rotation sensors • Optional for use with book – temperature • Battery life • Data memory

  14. http://shop.lego.com/en-US/ NXT IR Receiver $49.99 Compass $54.99 Gyroscopic $54.99 Infrared Seeker $49.99 Accelerometer $54.99 Accelerometer $54.99

  15. Temperature sensor

  16. To open NXT-G software • Open shortcut icon from desktop • If already in main NXT-G program use the switch toggle underneath “File” • Robot educator activities are excellent resources for tutorials and extra activities

  17. Configuration Panel Name your experiment and then you’ll be directed to the configuration panel. • Set duration – remember battery level • Also consider experiment itself (clapping hands) • Rate – time between samplings • Maximum is 25 times per second • Configure sensors • Options for each sensor will appear between port and colored box • Colored box drives color of line on screen – can be changed

  18. Operation • Real Time Operation • Maintains connection between computer and NXT throughout the length of the experiment • As values change, graph will also change in real time to reflect changes • To enable, press “download and run” button in control panel • When experiment duration is over, press button again to run experiment again

  19. Operation • Remote Operation • NXT can be disconnected and moved to another location for actual experiment • Press “download” button (similar to movement programs) • Run from my files as any other program • Connect back to computer, press upload, choose data log file from screen to retrieve data

  20. Analysis of Data Tools • Zoom – closer view on particular portions • Prediction – write and erase prediction lines • Analysis – choose single points or range of values • Annotate – enables small notes • Screenshot – takes a picture of graph and saves as standard image file to use in other programs

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