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This is not a complete list of all of the projects we have completed, but it does serve to show examples of some of our capabilities.

P.O.D. (Upgraded Measurment & Telemetry System)

This project, developed for Cape Residual Stress, is an upgrade of the previous system, developed in the first half of 2001. The new system contains an embedded PC system running linux, custom designed data acquisition cards, linux driver software and Delphi managment & data manipulation software.

Each data acquisition card consists of 4 channels, capable of simultaneous sampling at 400kHz per channel with a resolution of 14 bits (16384 steps). Each channel has it's own analog-to-digital converter for true simultaneous sampling & individual timers for truly independant sample timing. Up to 4 4-channel cards can be connected to one interface card, and up to 4 interface cards can be used in one system for a total of 64 analog input channels.

The POD is capable of communication through standard PC networks, wireless LANs, fixed-wire & cellular modems and RS232 & RS485 serial links.

Status: Current

Upgraded Tactor Driver

This upgrade to Engineering Acoustics' Tactor Driver board adds USB and serial connectivity to the driver board, as well as some feedback and other functions not implemented in the previous version.

April - August 2003

Soon to be added DLL to allow easier interfacing over USB & serial for user software.

  Process Measurment & Control

Two projects, currently under delelopment for Serina Kaolin, are the measurment of slurry flow in the feed pipelines to hydraulic presses to determine pressing cycle completion, and pallet stack weight/height measurment on a feeder to accuratly measure production throughput.

Started: September 2002 (on hold)

PC/104 Interface Board

We developed a PC/104 interface board for Engineering Accoustics Inc. in Florida, USA to drive their C2 Tactors. The board used a PIC microcontroller to generate a waveform which was then amplified and switched to different outputs under the control of the PC/104 host processor.

June/July 2002

Measurement & Telemetry System

This system was developed for mechanical engineers Cape Residual Stress to enable them to perform a stress & vibration analysis of DeBeers Marine's Wirth drill string, used in off-shore diamond mining opperations.

Two under-water 'pods', each one measuring four strain gauge bridges (torsion, axial, 2x bending) and a tri-axial accelerometer were used to digitise the data at the source. These pods were attached to the drill string at different depths underwater. The data streams were sent up the drill string on wires to a processing and telemetry unit. This unit combined the two data streams and transmitted the resulting data over a 2.4Ghz spread spectrum radio link to the PC interface unit. Software on the PC could then display running graphs of the incoming data as well as store it for further analysis.

The combined sample rate for this system was 2400 samples per second. This rate was divided between whichever inputs were being sampled at that time, however the split did not have to be equal. (eg 3x accelerometers @ 600Hz each + 4x strain bridges @ 150Hz each)
The resolution of the analog-to-digital conversions was 10-bits.

January-July 2001

 

VoiceScan Communicator

This product, developed for Shonaquip, enables children and adults who have little or no speech to communicate effectively.

It uses a matrix of LEDs that alternatly light up different words or symbols on an overlay page. When the word or symbol wanted by the user is highlighted, they hit an activation button, and a pre-recorded message relating to the selection is played by the unit.

The buttons are large and easy to activate, and can be placed in any position for convenient access.

2000

 

 

Electric-Eel Display

The Two Oceans Aquarium at the Victoria & Alfred Waterfront, Cape Town, required a visual display for their electric eel exhibit.

By locating a pair of probes in the tank, we could detect the electric currents that the eel generated while feeding and navigating (they are virually blind).

2001

 

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