Loughborough University
Thesis-1994-HabibIstepanian.pdf (4.97 MB)

Use of microcontrollers for diver monitoring by underwater acoustic biotelemetry in multipath environments

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posted on 2018-05-11, 14:02 authored by Robert S. Habib Istepanian
Biomedical Telemetry (Biotelemetry) is a special facet of bio-instrumentation which provides a means for transmitting physiological or biological information from one site to another. There are numerous situations in which it is desirable to monitor critical physiological reflexes and responses from freely swimming swimmers or divers. The design and implementation of a novel multi-channel digital acoustic biotelemetry system using a single-chip microcontroller is described. It is intended for monitoring the electrocardiogram (ECG), heart rate, breathing rate and depth of a free swimming diver, but the system has a modular design that can be adapted for the transmission of digital data representing any parameter. The use of the microcontroller enables the digital data to be transmitted in a priority interrupt format from each sensor with programmable pulse width timing. A portable receiver contains an identical microcontroller and is designed to scan three crystal-controlled frequencies to provide a logical output for each detected signal. These signals are captured by a portable data logger and interfaced to a computer for further processing. This automated arrangement greatly reduces the probability of data error by increasing immunity to multipath and reverberation effects. [Continues.]


Committee of Vice-Chancellors and Principals of the Universities of the United Kingdom (Overseas Research Studentship, ORS). Armenian General Benevolent Union (AGBU).



  • Mechanical, Electrical and Manufacturing Engineering


© R. Habib Istepanian

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This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

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A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.


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