Myoelectric hand
prosthesis

Myoelectric hand prosthesis for below elbow amputation.

Performed by Tavanmand Medicine and Industry startup in collaboration with the Faculty of Mechanics of Sharif University of Technology.

Project phases:

1
Basic research and conceptual design
2
Preparing parts and making hand prototypes
3
Performing the second phase tests on healthy people in the laboratory
4
Performing third phase tests in clinical settings on the patient and studying the effectiveness of myoelectric hand prosthesis.

Technical characters of the desired myoelectric hand prosthesis:

8

DOF

8 degrees of freedom of movement including 2 degrees of freedom in the wrist, 2 degrees of freedom in the thumb and 4 degrees of freedom in the other fingers

BM

Brushless motors

QDCs

Quick disconnect wrist unit

14

Grip

14 grip models such as column grip, finger point, open palm grip, hook grip ,tripod grip, pinch grip, key grip, power grip, active index grip, precision closed grip, mouse grip, relaxed hand position, precision open grip, finger adduction

35-50

Sound about 35 - 50 decibles

800

Weighing about 800 grams

10

carry (kg)

Ability to carry 10 kg in the hook grip position

140-230

drg/s

The angular velocity of the fingers is about 140-230 degrees per second

The cost of a myoelectric hand prosthesis is about 5000 $ vs 20,000 $ in similar prostheses around the world

Phases

Quarterly issue

1
2
3
4
5
6
7
8
%

1st phase:

Research and conceptual design

25%

Early research

Review of similar prostheses in the world

Conceptual design of the hand prosthesis

Details in hand prosthesis design

2nd phase:

preparation of parts and construction

25%

Preparation of parts

Manufacture of various hand prosthesis components

Hand prosthesis montage

Software user interface design

Design of electronic and control boards

Design of EMG vector data section

Preliminary tests of hand prosthesis function in robotic laboratory environment

Prototype modifications and optimizations

3rd phase:

Performing phase II tests on healthy people

25%

Optimization of electrical signal processing

4th phase:

Performing the third phase tests in clinical settings on the patient and evaluating the effectiveness by the clinical team

25%

Compilation of the final report

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