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unknown user
07-03-1997, 02:19 PM
I N T E R O F F I C E M E M O R A N D U M

Sensitivity: COMPANY CONFIDENTIAL Date: 04-Jul-1997 03:19pm AES
From: Monica Daley
DALEYM
Dept:
Tel No:

TO: _smtp%"""Biomch-L@nic.surfnet.nl"""

Subject: Summary: displacement transducer for swimming ideas

Thank you to everyone who was able to suggest some way of determining the
displacement of a swimmer quickly and non-invasively in start and turn
analysis.

Some of the responses given include:

* the use of ultrasound
* fishing line attached to the swimmer and a small dynamometer
* a similar system with a light cable from the swimmer to a deck-mounted drum
* video analysis with markers

Unfortunately, none of these ideas suited want we wanted because they were
either too invasive, hindered the swimmer in some way, or were too time
consuming.

As a result we have developed our own system which utilises a micro-camera
which tracks the swimmers head which is mounted on a tripod with a
potentiometer. Our programmers have written a software package which calculates
the displacement of the swimmer when triggers are pressed (at desired events).
The system is currently being used quite successfully with the AIS swim squad
in the USA.

Again thank you for your suggestions

Monica Daley
Biomechanics Department
Australian Institute of Sport
daleym@ausport.gov.au