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AGVS Guidance Systems And Routing Kevin Ferguson Goodyear Tire & Rubber Co.

AGVS Guidance Systems And Routing Kevin Ferguson Goodyear Tire & Rubber Co. AGVS Overview. Components Controller Sensors RF Modem Vehicles Fork Truck Tow Truck Conveyor Deck Scissor Lift Guidance Systems and Routing. Problem Area. How Does a Company Choose a Guidance System?

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AGVS Guidance Systems And Routing Kevin Ferguson Goodyear Tire & Rubber Co.

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  1. AGVS Guidance Systems And Routing Kevin Ferguson Goodyear Tire & Rubber Co. 2000 Kevin W. Ferguson

  2. AGVS Overview • Components • Controller • Sensors • RF Modem • Vehicles • Fork Truck • Tow Truck • Conveyor Deck • Scissor Lift • Guidance Systems and Routing 2000 Kevin W. Ferguson

  3. Problem Area • How Does a Company Choose a Guidance System? • What Things Need to Be Considered When Choosing a Route? 2000 Kevin W. Ferguson

  4. Guidance Systems (1) • Wire Guidance • Wire Placed in Floor • Vehicle Follows Wire • Coils Straddle Wire in Floor • Voltage Difference is 0 When Centered • If Off Center, Coils Create Steering Signal • Disadvantages • Vehicle May Not Know Location • Not Flexible • Advantages • Reliable • Good for Dirty Environment 2000 Kevin W. Ferguson

  5. Guidance Systems (2) • Optical Guidance Systems • Use Paint or Reflective Items on Floor • Light on Bottom of Vehicle Reflects off The Paint/Items • Sensors Detect Light and Guide Vehicle • Disadvantages • Paint/Items Wear • Must Be Clear of Obstructions • Advantages • Flexible • Easy to Repair 2000 Kevin W. Ferguson

  6. Guidance Systems (3) • Laser Guidance • Laser Scanner Looks for Reflective Targets • Scanner Measures X and Y Coordinates from Targets • Target Locations are Preprogrammed • Needs Three to Five Targets in “Sight” • Disadvantages • Requires Additional Setup Time • 15-30% Increase in cost • Advantages • Flexibility • Used in Rough Terrain 2000 Kevin W. Ferguson

  7. Guidance Systems (4) • Inertial Guidance System • Gyroscope Detects Accelerations • Information from Gyroscope is sent to Controller to Direct AGV • Disadvantages • Parts Wear • To Be Effective, System Needs Additional Guidance Devices • Advantages • Flexibility • Reliable 2000 Kevin W. Ferguson

  8. Guidance Systems (5) • Dead-Reckoning • Rotation and Steer Angle Are Measured • Wheel Slip Gives False Readings • The Future • More Laser Guided Systems • Use of GPS 2000 Kevin W. Ferguson

  9. Routing Considerations • Number of Vehicles • Floor Space • Static Guide Path • Unidirectional • Bi-directional • Dynamic Path • Source/Delivery Points • Routing Efficiencies 2000 Kevin W. Ferguson

  10. Conclusions/Implications (1) • Systems Have Merit • Must Carefully Consider Desires for System Prior to Selecting Route and Guidance System • Wire Guided Systems are Most Reliable • Laser Guided Systems Maximize Flexibility 2000 Kevin W. Ferguson

  11. Conclusions/Implications (2) • AGVS Use Computers Instead of People • AGVS Offer Coverage Around the Clock at No Additional Cost • Another Application of Computer Integrated Manufacturing 2000 Kevin W. Ferguson

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