Backpacking Pain Points Sore shoulders Unreliable energy sources - - PowerPoint PPT Presentation

▶
backpacking pain points
SMART_READER_LITE
LIVE PREVIEW

Backpacking Pain Points Sore shoulders Unreliable energy sources - - PowerPoint PPT Presentation

May 09, 2023 275 likes •508 views

Backpacking Pain Points Sore shoulders Unreliable energy sources 12.2 million backpackers in US Our Solution Linear Bearings Floating Pack Spring/Damper System Charging Battery Can we reduce peak forces felt by a

slide-1
SLIDE 1

Backpacking Pain Points

  • Sore shoulders
  • Unreliable

energy sources

slide-2
SLIDE 2

12.2 million

backpackers in US

slide-3
SLIDE 3

Our Solution

Spring/Damper System Linear Bearings “Floating” Pack Charging Battery

slide-4
SLIDE 4

Can we reduce peak forces felt by a backpacker?

slide-5
SLIDE 5

Sketch Model

slide-6
SLIDE 6

Sketch Model

slide-7
SLIDE 7

Sketch Model

slide-8
SLIDE 8

Sketch Model

slide-9
SLIDE 9

Sketch Model

slide-10
SLIDE 10

Sketch Model

slide-11
SLIDE 11

Sketch Model

slide-12
SLIDE 12

Springs Worsened Forces!

slide-13
SLIDE 13

Results Explained

  • Model is overly

simplified

  • External damping

force needed

slide-14
SLIDE 14

Next Steps

  • Reassess feasibility with different

suspension models

  • Pulley system
  • Dampers
  • Select electricity generation method
  • Magnetic flux induced current
  • Linear to rotational motion
slide-15
SLIDE 15

Citations

SMA Sports Market Analytics, http://sportsmarketanalytics.com/ (for backpacking participants; accessed October 2, 2019). Thomas, Anthony T., "Effects of Pack Weight on Endurance of Long-distance Hikers" (2013). Dissertations and Theses. 140. https://commons.erau.edu/edt/140 Hoover, J., and S. A. Meguid. “Performance Assessment of the Suspended-Load Backpack.” International Journal of Mechanics and Materials in Design, vol. 7, no. 2, 2011, pp. 111–121., doi:10.1007/s10999-011-9153-7.

slide-16
SLIDE 16

Reference Slides

slide-17
SLIDE 17

Sketch Model

0.687 Joules/step*

*Assuming 27 lb bag and 2.2 Hz step frequency

3 inch range ⇩ 6 inches per step

slide-18
SLIDE 18

Sketch Model

0.687 Joules/step*

*Assuming 27 lb bag and 2.2 Hz step frequency

3 inch range ⇩ 6 inches per step

slide-19
SLIDE 19

Sketch Model

0.687 Joules/step*

*Assuming 27 lb bag and 2.2 Hz step frequency

3 inch range ⇩ 6 inches per step

slide-20
SLIDE 20

Sketch Model

3 inch range ⇩ 6 inches per step 0.7 Joules/step*

*Assuming 27 lb bag and 2.2 Hz step frequency

slide-21
SLIDE 21

Sketch Model

5 miles at 0.7 Joules/step 50% phone charge OR > 2 hours flashlight use