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The reflection and transmission processes of those signals within inhomogeneous bodies are complex and their prediction is challenging.

In this paper, we present an experimental setup (UWB system; phantom) for the detection of vascular dilation within soft tissues.

The development process of short-range underwater communication systems consists of di erent phases.

Each phase comprises a multitude of speci c requirements to the development platform.

The Big Bubble Curtain especially protects porpoises and seals which use ultrasound as orientation in water.Furthermore, we suggest a theoretical simulation model for the prediction of the reflection of ultra-wideband pulses and compare these simulated predictions to results of measurements within the phantom. Single schramberg The results verify that we are able to identify vascular dilation within the simulation model and the experimental setup, depending on the depth of the vessel (20 mm, 40 mm, 60 mm).Data communication with high data rate and precise underwater positioning with an accuracy of several centimeters is a problem.Precise positioning is important for autonomous operation and helps conserve energy which is important for many tasks.

Single plattform Lübeck

The Big Bubble Curtain is now used in almost all construction work for offshore wind farms and blasting work in the North Sea and Baltic Sea. Mai 2015 wissenschaftlicher Mitarbeiter im Fachbereich Elektrotechnik und Informatik an der Fachhochschule Lübeck.We investigate different wavelengths and employ curve fitting based on the Levenberg-Marquardt algorithm to determine the unknown coefficients of the model e.g. Our evaluation shows promising results and distance estimation of up to 25~m is possible. dating 50 Lemvig In stream water we determined the mean error for the optical distance estimation of 0.04m.The Big Bubble Curtain (BBC), or in German ‘Großer Blasenschleier’ (GBS), is a compressed air system for sound absorption in water.

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We have developed this system in line with respective conditions and with subsidies from the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear safety (BMUB).An upcoming medical application is the detection of the heart rate of patients.However, current UWB systems provide poor resolution and are only able to detect vessels with a large diameter, e.g. The detection and quantification of vascular dilation of thinner vessels is essential to develop wearable ultra-wideband based devices for real-time detection of cardiovascular conditions of the extremities.In this work, we propose optical distance estimation, which is the foundation for positioning.We combine the Beer-Lambert law and the inverse-square-law to model the channel of the medium.

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