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PARAMETERS AND HUMANMOTION MEASURING SYSTEM

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VARIABLES FORCE

MOMENT

TIME (t)

DISPLACEMENT Linear

Angular

VELOCITY Linear Angular

ACCELERATION Linear

Angular

Kinetics

Kinematics

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MOTION DEFINITION

a natural event that involves a change in

the position or location of something

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Motion Concept Process

Period involved

Maximum rate of 3 x 10 m/s (light speed)

Reference Origin

Point/Axis

Displacement Location

orientation

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Factors Leading to Motion Force

Pushing

Pulling Orientation

Moment

Example: A Bicycle rider going down a slope is accelerating because:

(i) gravity

(ii) Propulsive

(iii) Friction

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Analysis Time

Kinetics

Force

Moment

Kinematics

Linear

Angular

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0 0.5 1.0 1.50

10

20

30

Time (sec)

meters/sec

Sepak Kuda, 3D Ball Linear Velocities

0 10 20 30 40 50 60 70 80 90 1000

0.1

0.2

0.3

0.4

0.5

Percent Time

Volts

Normal & Amputee left rectus femoris EMG

left rfem emg of a normal subject

left rfem emg of an amputee subject

The2 mm PTB socket after stress

analysis of 100 kPa at the PT bar.

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MOTION MEASURING SYSTEM

(MMS)

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VALUE OF MMS(1) Cost

Equipment Hardware

Software

Staff Training

Salary

(2) Characteristics Abstract

Availability

Transportability

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Cont.

(3) Test Speed

Patients Comfort

Acceptance

Coverage

Data Processing

Accuracy

Results

Diagnosis Treatment

Evaluation

Reliability

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TYPES OF MMS(From The Point of Imaging)

Analyser (Full Biomechanical Analysis System)

9 Parameters

Complex Expensive

Accurate

Evaluator (Movement Evaluation System)

Less expensive

Easy operation

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Analyser

(Full Biomechanical Analysis System)

Cameras

Types

Video Infrared

Number

More than 3 cameras

Speed

Minimum 50 Hz (fps)

High-speed (up to 2000 fps)

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Cont

Brands

Infrared VICONPEAK

ARIEL PERFORMANCE

ELITE

MOTION ANALYSIS CAPTURE

ORTHO TRAK

MACREFLEX

Video VICONPEAK

ARIEL PERFORMANCE

SP2000

Markers Passive

Active

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Evaluator

(Movement Evaluation System) Visual*

Timing

Displacement

Acceleration

Transducer

Muscle

* Except Visual, all others are not an imaging category

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Cont

Visual Naked eye

Real-time One-off

Unaccurate

Timing Watch

Stopwatch

Trigger

Wrist watch

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Cont

Displacement Linear

Ruler Measuring tape

Angular Goniometer

Acceleration Meter

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Cont

Transducer

Force

Platform or plat

Moment

Muscle Electromiography

Electrod

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Those equipment will be covered indetail in the next topic.