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PORTFOLIO2020
K A B I R K N U P P
www.kabirknupp.com
p1
KEYTURNERdevelopment of a motorized device that helps people with ar-
thritis open doors using their keys
ARTHRITIS
p2
university group project(conceptual)
Mar 2019 - June 2020
solo retake(prototyping)
June 2020 - Aug 2020
improved design(prototyping)
Aug 2020 - present
This is a product that I believe is able to improve the lives of those with limited hand dexterity. This is why I decided to take the project beyond the classroom and to make prototypes for a viable product that can be mass manufactured.
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foam modelling + user tes tingexploring hand comfor t+ keyhole access ib ility
KEY INSIGHTS
Knee Bend Low Strength Hand Tremors Wrist Pain Closed Fingers
USER RESEARCH
£5.99
EXISTING PRODUCTS
£4.79
the re is a gap in the mark e t fo r a moto r is ed k ey turne r
p5
less finger curl
- spherical shape; infinite axes of rotation
lightbulb + tape + key
technique adopted by those with arthritis
p6
2200mAh ICR 16340 3.7V Re-chargeable Li-ion Battery
20mm DC 3V-5V 38RPM Three Stage Planetary Gear-box 12 kgcm torque (at 3V).
reduce tooling
Solution: secure 3D printed part with shaft collar
Problem: motor torque destroys interference slot for shaft
12 teeth12 teeth
120 teeth120 teeth
54 teeth54 teeth
Stage 1Stage 11420RPM, 0.109N-M 260RPM, 0.596N-M 49RPM, 3.26N-M
Stage 2Stage 2 Stage 3 Stage 3
12 teeth12 teeth
120 teeth120 teeth
54 teeth54 teeth
12 teeth12 teeth
120 teeth120 teeth
54 teeth54 teeth
RS PRO DC Motor, 1.5 -3 V dc, 20 gcm torque, 7800 rpm, custom planetary gearbox design
proof of concept
testing in home door
launch at wall
add snaphooks and corresponding
grooves until survival
scale up to fit both the motor and battery
part incased but still able to rotate
trying a battery slot compactness
p7
casing print 1snap fit testing
casing print 2 casing print 3 casing print 4
I was able to design 3D printed casing that could snap fit shut. This meant that I could open and close the device quickly and make it appear naked from the outside.
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ILLUMINATION FEATURE
ILLUMINATION
TRANSLUCENCE
3.3V LED
Having an illumination feature that could light up the keyhole was heavily suggested from all users - trying to insert your keys in the dark can be very difficult.
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Shape of part turning provides mechani-cal feedback (particularly comforting for
elderly users)
Fits any key (gaps on each side allow any dimension of key to sit comfortably within the turner).
lubricated metal separator disk for smooth and quiet turning.
Inductive charging dock compatability (removing the need of hand dexterity to
needed to plug in a cable).
Illumination feature lights up the key-hole for better view in the dark (de-vice doubles up as flashlight).
All buttons are internal, giving the device external simplicity (a button on the outside can suggest a par-ticular orientation at which the device should be used;
which is problematic)
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POMEGRANITE
A DESIGN THAT IS FRIENDLIER FOR OLDER PEOPLE
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VASE
curvier
more opaque
slightly larger
CONTINUATIONI had feedback that the previous design looked a bit too alien for the target
market (which is mostly elders).
I redesigned the product with some friendly semiotics.
preliminary prints (testing interference dimensions)
p13
SKELETON/CAGE CASING
corner extrusions jam rotary motion of cage
experimentating ways to remove the need for large amounts extrusions in the casing
12mm dia x 2mm thick Neodymium Magnet - 1.6kg Pull (strong)
KEY INSERTION
- spherical clips for better grip if changing keys
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user sets up their key once with the grub screw
interference fit with tiny tolerance+ strong glue (fixing magnet to part)
new design is also com-patable with any key.
insertion technique reiterated:- intersecting - tesselating extrusions to transmit rotation- shaved off length
I didn't use the cage system for the first working prototype; I needed to be sure the components were secured really firmly.FIRST WORKING PROTOTYPE
soldering a simple direction switch circuit
Arduino Uno + MPU60 Gyroscope module
extrusions + paths for wires
The final product has no external switches. To activate a particular turning direction the user nudges the device clockwise or anticlockwise.
CIRCUIT DEVELOPMENT
push activation (concept prototypes from earlier)
motor terminal A
motor terminal B
battery +
battery -
p15short demo of prototype one: https://www.youtube.com/watch?v=zBsV0qHPkbI&feature=youtu.be&ab_channel=Kabir
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building a gizmo with a continuous user interaction
MUSICAL MACHINE
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HIGH TORQUE ROTARY MOTION
bring marbles upward - drop them onto drum
DRUMBEATCAM INDUCED TRANSPORTATION
wheel plucks Kalimba keys - music box style
USER INTERACTIONCLAPPING RATE DETERMINES TEMPO
CLAP
clap at different speeds to conduct the machine
CLAPCLAP
CLAPCLAP
MELODY
The project aimed to create a robot that constantly responds to a stimulus.
This robot mechanically plays music at a tempo set by a person's clapping rate.
OVERVIEW
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CARDBOARD PROTOTYPE
FINAL PHYSICAL RESULT
wood glueassembly
fourteen-edged wheel(14 note melody cycle)
retractable music pin(interference fit)
TESTING IN ACTION
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INSPIRATION(this is not originally
my own image)
ESCHER’S PENROSE STAIRS
3D PRINTING SOLUTIONS
printing without supportsinterference fit between two prints
lower % infillightweight print
feet - base supportsPRINCIPLES OF AN ENGINE
cam rings
p21
SMALL ABS GEARS + ELASTIC PULLEY
LASERCUT WHITE ACRYLIC GEAR TRAIN
TRANSMISSION
H-BRIDGE MOTORDRIVER
2x 12V MOTOR
4x 3V BATTERY PACK
2x 1.5V BATTERY PACK
ADAFRUIT PLAYGROUND EXPRESS (3V)
ELECTRONIC COMPONENTS
161 °
ADAFRUIT PLAYGROUND EXPRESS
p22
(this is not my own image)
ALGORITHM
1) AVERAging of REAl timE sound VAluEs bEing inputtEd
2) if sound REAding > thREshold VAluE (clAp), timE ElApsEd = t0
3) updAtE most REcEnt clAp to bEcomE t0 And pREVious to t1
4) cAlculAtE tRAnsition timE (subtRAct t0 fRom t1)
5) smoothing (AVERAging) of tRAnsition timEs bEtwEEn clAps
6) mAp tRAnsition timE AVERAgE to motoRspEEd
t0 - t1CLAP 1 CLAP 2 CLAP 3
TRANSITION TIME
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LASERCUTTING 4mm MEDIUM DEN-SITY FIBREBOARD (LIGHT)
DESIGN CONSISTENCYDESIGN
CONSISTENCY
SUN ENGRAVING
REFLECTIVE THEME
p22
12LEGGED
ROBOT
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Inspired by the Trinacria of Siscily
Universal joints allowing leg rotation during steering
linkage configuration allows turning circle of small radius
Torque transmitted by gears and chains
Rack and pinion steering actuated by mi-cro-servo motor.
runs faster than 0.5 m/s andhas body size less than 8cm.
p26
CAD ITERATIONS
MOTION TESTING (SOLIDWORKS)
GROUND
OBSTACLE
ROBOT
TAKING MOMENTS FROM :
DERIVED FROM:
HEIGHT OF OBSTACLEWEIGHT FORCE
LEG-WHEEL DIAMETERMASS OF ROBOT
ROBOT ABLE TO CLIMB OBSTACLES AT LEAST 55mm HIGH
ASSUMING THAT:
FINDING MAXIMA
CONSTANT
MAX TORQUE AT MOTOR CHOICE IS BASED OFF THIS CALCULATION
USING EXTREME CASES OF VALUES
PRELIMINARY VALUES
p27
TANDEM BICYCLE FRAMEUSING FINITE ELEMENT METHODS TO FUNCTIONALLY IMPROVE THE DESIGN OF A TANDEM BICYCLE FRAME
p28
-FIXTURES-LOADS
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-RAISE NATURAL FREQUENCY OF THE BICYCLE -INCREASE FATIGUE LIFETIME OF THE BICYCLE
SIMULATION PURPOSES:SIMULATION PURPOSES:
- larger welds at joints
- increased thickness pipes- frame width reduced
- smaller angle seatpost-new structural members
1.1.
3.3.
2.2.-FREQUENCY STUDY
-STATIC STUDY
THANK YOU FOR YOUR CONSIDERATIONyou can also see my website at www.kabirknupp.com