rian.ie - Browse

Author(s)
Institution
Publication types
Funder
Year

Limited By:	Author = Burke, Edward;

5 items found

Sort by

Order

per page

Displaying Results 1 - 5 of 5 on page 1 of 1

Marked Mark

A Wireless and Digital Electrode Bus Topology for Biopotential Measurement (2012)

Nolan, Mark; Burke, Edward; Coyle, Eugene

A Wireless and Digital Electrode Bus Topology for Biopotential Measurement (2012)

Nolan, Mark; Burke, Edward; Coyle, Eugene

Abstract:

The conventional biopotential measurement configuration utilises long lead wires which connect measuring electrodes to signal conditioning circuitry. The majority of bioelectric signals that are measured from the human body have a tiny signal amplitude (5µV-5mV range) and thus any interference that is induced on the lead wires can have a detrimental effect on the original signal. In this paper, we present an alternative configuration, in which digitisation occurs on the electrode, potentially providing enhanced signal measurement as well as significant benefits in terms of the simplification of the physical interconnections between electrodes. Multiple electrodes are combined to form a digital electrode bus. This proposed topology represents the next stage in the evolution of bioelectric measurement as, due to the decrease in cost and size of integrated circuits, more of the bioinstrumentation circuitry is shifted away from a base measurement station and into the electrode itself. T...

https://arrow.dit.ie/teapotcon/28

Marked Mark

Accelerometer Based Measurement for the Mapping of Neck Surface Vibrations During Vocalized Speech (2009)

Nolan, Mark; Madden, Brian; Burke, Edward

Accelerometer Based Measurement for the Mapping of Neck Surface Vibrations During Vocalized Speech (2009)

Nolan, Mark; Madden, Brian; Burke, Edward

Abstract:

This paper presents a detailed study of the vibrations on the surface of the neck during a vocalization of predefined fundamental frequency and intensity. This study was carried out as part of a wider investigation into the use of laryngeal vibrations as a channel of communication. Another potential application of this study is in identifying a suitable location for a hands-free electro-larynx for laryngectomees. An analog accelerometer, with dimensions 5x5x1.6mm and of mass 80mg, was used to perform the measurements. It was connected to a 12-bit analog-to-digital converter via single strands of insulated wire with a diameter of 100μm. The resulting low inertia of the measuring device minimized the effect of the measuring device on the phenomenon under investigation. The analog-to-digital converter simultaneously sampled the accelerometer output and a pre-amplified audio signal from a microphone. This preliminary study was carried out on two able-bodied male subjects. Measurements w...

https://arrow.dit.ie/teapotcon/6

Marked Mark

Accelerometer Based Measurement of Body Movement for Communication, Play, and Creative Expression (2008)

Nolan, Mark; Burke, Edward; Duignan, Frank

Accelerometer Based Measurement of Body Movement for Communication, Play, and Creative Expression (2008)

Nolan, Mark; Burke, Edward; Duignan, Frank

Abstract:

This paper presents a newly designed wireless accelerometer-based movement measurement device. The device is capable of measuring activity ranging from gross body movements to more subtle vibrations emanating from the body, including laryngeal vibration and the mechanomyogram (mechanical vibrations from working muscles). The main body of the device, which is less than 20cm3 in volume and weighs less than 50g, contains a microcontroller, wireless transceiver, battery, and one accelerometer. A supplementary accelerometer module is connected to the main device by thin wires. This module is very light weight and can therefore be directly attached to the skin to measure laryngeal vibration, mechanomyogram, or cardiac muscle movement. The prototype device has been initially applied to facilitating play and creative expression by children with physical disabilities. For this purpose, the main module was adapted to be worn behind the ear while the supplementary accelerometer module is attac...

https://arrow.dit.ie/teapotcon/5

Marked Mark

Novel Bioelectrical Measurement using a Digital Biopotential Monode (2011)

Nolan, Mark; Burke, Edward; Coyle, Eugene

Novel Bioelectrical Measurement using a Digital Biopotential Monode (2011)

Nolan, Mark; Burke, Edward; Coyle, Eugene

Abstract:

In conventional biopotential recording, two or more electrodes are placed on the body. A unipolar lead records the time-varying electrical potential at a single point (relative to a reference potential) via one signal electrode. A bipolar lead records the time-varying potential difference between two points via two signal electrodes. In each case, the signal electrodes are connected to high impedance amplifier inputs, while an additional electrode provides a low-impedance path between the amplifier and human subject. Bipolar leads are usually preferred since interference appearing at both signal electrodes can be eliminated using an instrumentation amplifier with high CMRR. A drawback of bipolar lead recording is that wires must connect all electrodes to the amplifier. This paper presents preliminary work on a novel design for a digital biopotential measurement device which we call the biopotential monode.

https://arrow.dit.ie/teapotcon/21

Marked Mark

On Improving Electrooculogram-Based Computer Mouse Systems: The Accelerometer Trigger (2011)

Keegan, Johnalan; Burke, Edward; Condron, James; Coyle, Eugene

On Improving Electrooculogram-Based Computer Mouse Systems: The Accelerometer Trigger (2011)

Keegan, Johnalan; Burke, Edward; Condron, James; Coyle, Eugene

Abstract:

Eye tracking is a well-established method of computer control for profoundly paralysed people (Anson et al., 2002). Cameras are commonly used to track eye movements (Morimoto et al., 2005) but one alternative is the bioelectrical signal known as the electrooculogram (EOG). There are some EOG mouse control systems that facilitate the use of GUI applications, but certain actions, which are straightforward using a conventional mouse, remain impossible. Unless the eyes are tracking a target, they move in saccades (jumps), making it impossible to voluntarily trace out smooth trajectories with one's gaze, as would be required to draw a smooth curve. The conventional paradigm for EOG mouse control maps horizontal and vertical angular displacement of the eyes onto the coordinates of the mouse pointer (Gips et al. and Estrany et al., 2008), while the head remains stationary. Reversing this paradigm, if the point of fixation remains unchanged, the EOG can measure head movement. The prese...

https://arrow.dit.ie/teapotcon/19

Displaying Results 1 - 5 of 5 on page 1 of 1