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Dr. Stacy Bamberg Faculty Advisor Dr. Bruce MacWilliams Industry Advisor

Dr. Stacy Bamberg Faculty Advisor Dr. Bruce MacWilliams Industry Advisor Dante Bertelli dante@g6net.com Brad Hansen bch2000@hotmail.com Joseph Alston jda12@utah.edu Chad Taylor jchadtaylor@hotmail.com. Outline. Schedule Budget Mechanical Design Electronic Design. Schedule.

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Dr. Stacy Bamberg Faculty Advisor Dr. Bruce MacWilliams Industry Advisor

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  1. Dr. Stacy Bamberg Faculty Advisor Dr. Bruce MacWilliams Industry Advisor Dante Bertelli dante@g6net.com Brad Hansen bch2000@hotmail.com Joseph Alston jda12@utah.edu Chad Taylor jchadtaylor@hotmail.com

  2. Outline • Schedule • Budget • Mechanical Design • Electronic Design

  3. Schedule • Hip Manufacturing Complete • Knee Designed • Manufacturing Due April 1 • Electronics Due Design Day

  4. Budget • Revised for Electronics • Total: $1,000.00 • Used: $90.00 • Mechanical Components: $210.00 • DAQ: $275.00 • Electronic Components: $425.00

  5. Mechanical Design Lower Limb Model • Hip Manufacturing • Knee Design • Foot Redesign • Leg Members Hip Knee Leg Members Foot ProE Drawing Courtesy: Brad Hansen

  6. Mechanical Design – Hip Manufactured Hip • Manufacture Complete • Design Functional • Optical Encoders to be Mounted Image Courtesy: Brad Hansen

  7. Mechanical Design – Knee Knee Upper Leg • Design Complete • Materials Ordered • Manufacturing to Start Next Week Fork Patella Axis Lower Leg Knee Bent Upper Leg Fork Clearance ProE Drawings Courtesy: Brad Hansen Lower Leg Patella

  8. Mechanical Design – Foot and Leg Members Foot • Foot to be Redesigned • Leg Members to be Ordered Motion Axes Leg Members Telescopic Tubing ProE Drawings Courtesy: Chad Taylor Image Courtesy: www.testrite.com

  9. Electronics • Low cost • Miniature size • Push-on hub - spring loaded collet design • Minimum shaft length of .375" • Shaft diameter of 1/4" • High retention snap-in polarized connector • Accepts ±.020" (±.5mm) axial shaft play • Tracks from 0 to 30,000 cycles/sec • 256 cycles per revolution (CPR) • 2 channel quadrature TTL squarewave outputs • -10° to +85°C operating temperature • Single +5V supply • Incremental Encoder – E4P-256-250-H Image courtesy: http://www.usdigital.com

  10. Electronics Data Rates: • 256 Cycles per revolution • 120 revolutions per minute • Using quadrature TTL squarewave • Sample rate of 2kHz per channel • Each encoder consist of 2 channels (A & B) • The Lower limb needs to have 6 optical encoder installed. • Total Sampling Rate = 2kHz*2(channels)*6(optical encoders) • =24kHz

  11. Electronics Transmission line to computer • Wireless (RF) • Serial (RS-232) • Fiber optics (Soundcard) • Embedded Compact Flash Card • USB DAQ

  12. Electronics Transmission line to computer • Wireless (RF) or Serial (RS-232) • Interfacing with dsPIC30F Family: • Only two optical encoder per PIC. • Data transmission over serial/wireless. • Custom PCB needed.

  13. Electronics Transmission line to computer • Fiber optics (Soundcard) • Digital signal processing needed. • Multiple chips needed • Team is made of MEs not EEs.

  14. Electronics Transmission line to computer • Compact Flash • Interfacing with dsPIC30F Family: • Only two optical encoder per PIC. • Custom PCB needed.

  15. Electronics Transmission line to computer • USB DAQ • Easy to use • Advanced expertise inside group • Suitable data rates • Predictable • USB Extension

  16. Electronics Transmission line to computer USB DAQ • National Instruments • USB-6501 (Full digital) • 24 Digital lines • USB-6009 (Analog/Digital) • 48 kS/s • 12 Digital • 12 Analog lines

  17. Electronics Data Processing LabView SignalExpress Matlab

  18. Conclusion • On-Schedule • Budget is Adequate • Mechanical Design • Hip Manufactured • Knee Designed • Foot and Leg Members “in the works” • Electronic Design • Optical Encoder • Data Transmission • Data Processing

  19. For Further questions contact our Team Leader: Dante Bertelli at dante@g6net.com

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