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Laboratory 7: Sensors. Overview. Objective Background Materials Procedure Report / Presentation Closing. Objectives. Design two sensor programs Mindstorms: use sensors to stop a motor when a red ball is detected

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Presentation Transcript
overview
Overview
  • Objective
  • Background
  • Materials
  • Procedure
  • Report / Presentation
  • Closing
objectives
Objectives
  • Design two sensor programs
    • Mindstorms: use sensors to stop a motor when a red ball is detected
    • LabVIEW: use a thermocouple to measure temperature in a heating and cooling program
  • Apply sensors to Semester-Long Design Projects
concept control systems
Control system

System created to read and analyze data

Use analyzed data for appropriate action

Examples:

Thermal controls

Lighting systems

Alarm systems

Motion sensors

Concept : Control Systems
concept sensors
Concept: Sensors
  • Sensors
    • Read data from test environment
    • Data converted to digital format for computer
  • Some sensor types:
    • Light
    • Temperature
    • Ultrasonic
    • Touch
  • Sensors connect to different control devices:
    • Lego sensors -> NXT
    • Thermocouple -> DAC -> PC
materials
Materials
  • Mindstorms sensor program
    • NXT
    • Test assembly
    • Computer with Mindstorms
  • LabVIEW sensor program
    • Computer with LabVIEW + DAC
    • Thermocouple
procedure mindstorms sensor program part a
Procedure: Mindstorms Sensor Program Part A
  • Port 1 touch sensor
    • Starts program
    • Starts motor on Port A
    • Reverses direction of motor
  • Port 2 touch sensor
    • Stops motor on Port A
    • Ends program
  • Port B motor
    • Varies speed of Port A motor
procedure mindstorms sensor program part b
Procedure: Mindstorms Sensor Program Part B
  • Port 3 ultrasonic sensor
    • Reverse direction of motor when greater than 20cm from wall
    • Reverse direction of motor when less than 8cm from wall
procedure mindstorms sensor program part c
Procedure: Mindstorms Sensor Program Part C
  • Port 4 light sensor
    • Stops motor when red ball is detected

(value greater than 45)

    • Ends program
procedure labview sensor program
Procedure: LabVIEW Sensor Program
  • Design (based on VI from LabVIEW Lab)
    • Back Panel – Add “AI Sample Channel.vi”
      • Name the channel “thermocouple”
        • Receives input from thermocouple
      • Change thermometer to indicator
        • Display input
  • Testing and Data
    • Insert thermocouple wires
      • Yellow wire -> Pin 3 of DAC
      • Orange wire -> Pin 4 of DAC
    • Have TA test your program
    • Take screenshot of Front and Back Panels
assignment report presentation
Assignment: Report/Presentation
  • No report for this lab
  • No Presentation for this lab
  • Milestone 2 due next recitation
closing
Closing
  • Have all lab notes signed by TA
  • Each team member should have turn using software
  • Return all unused materials to TA