Medical Sensor System: System designed for: Non-invasive ‘Sensor Patch’ used to monitor newly born infants

In this research a sensor patch for newborns is proposed. This sensor patch is a device which would be attached to the skin of a newborn in order to monitor vital health signs such as: temperature, heart rate, respiration rate and oxygen saturation. Furthermore, a bilirubin sensor will be included to check the newborn for jaundice. Thereafter,...

Microneedles for Optical Spectroscopy: To measure across the skin barrier

[Background] This project provides a proof of principle to use microneedles in combination with optical spectroscopy for bilirubin detection. For newborns, high bilirubin levels in the blood can lead to serious health consequences, such as jaundice, which can lead to brain damage. Therefore, it should be detected as early as possible. However,...

Electronic markers for geological research: Tag Design

In this thesis, the implementation of a passive, chipless, frequency coded Radio-Frequency Identification (RFID) tag for bedload transport studies is proposed. The proposed tag will be deployed in the semi-arid Río Colorado river, Bolivia with the aim to develop quantitative sediment transport models that relate transport to grain size. The...

Ambient RF Harvesting in Office Environment for IoT Sensor

This report discusses one part of a project consisting of three parts. The goal of the project is to design a battery less sensor powered by RF energy fields present in an office environment. The sensor is able to measure the temperature and is able to communicate wirelessly using a low power communication protocol. In this project the use case...

Autonomous battery less sensor for IoT applications in Smart Buildings: Low-power Energy Conversion and Storage for RF Energy Harvesting

This report discusses one part of a project consisting of three parts. The goal of the project is to design a battery less sensor powered by RF energy fields present in an office environment. The sensor is able to measure the temperature and is able to communicate wirelessly using a low power communication protocol.In this report the energy...

Low-power processing and communication

This report discusses one part of a project consisting of three parts. The goal of the project is to design a battery less sensor powered by RF energy fields present in an office environment. The sensor is able to measure temperature and is able to communicate wirelessly using a low power communication protocol. In this project the use case of a...

Miniaturized conductivity measurement system

Fabrication of an ultraviolet absorption spectroscopy probe for protein quantification in bioreactors

Bioreactors are used nowadays to produce proteins with therapeutical effect that can treat a new range of diseases in humans. Unfortunately, measuring protein concentrations directly inside bioreactors in real time is still an unsolved challenge. This is due the large amount of compounds that can be found inside the bioreactors that interfere...

High Precision Flow Compensated Thermal Conductivity Detector for Gas Sensing with Read-out Circuit

In this work, a novel approach is presented for in-line flow compensation using a dual-Thermal conductivity detector (TCD). TCDs demonstrate a flow dependence and require a calibration at a fixed flow rate. The dual-TCD is composed of two thin-film sensors on membranes in parallel on the same chip. Both are laterally identical, but with a...

Heart rate measurement through PPG: Heartbeat measurement in a wireless headset

This thesis, assigned by Plantronics, proposes a solution to the motion artifacts that corrupt the results of PPG (Photo Plethysmo Graphic) signals and therefore the determined heart rate during physical exercises. An Infra-Red light emitting diode and phototransistor package was used to create a PPG signal that was amplified using an...

Colour based heart rate detection: Heartbeat measurements in wireless music headsets

In this thesis, assigned by Plantronics®, the analysis and implementation of a colour based heart rate sensor will be discussed, which can be integrated in a sports headset. Two implementations are discussed: an RGB (Red, Green and Blue) sensor and a Light Dependent Resistor (LDR). The former setup identifies colour variations while the latter...

Acoustic design and scaling aspects of a photoacoustic sensor system for combustible gases

Nowadays most of the energy needed comes from fossil fuels such as natural gas (NG). Dwindling stocks of all fossil fuels, including locally occurring natural gas reservoirs, have spurred the effort to both decrease dependence on local fuels and switch to renewable, green energy. The drawback to gas sources like Subsitute Natural Gas (SNG),...

Micro spectrometer for the measurement of the composition of new gas

As the world is in need of more sustainable energy sources, the use of new gases like hydrogen or bio-gases seems to be a very attractive one. By mixing these new gases with the traditional natural gas, it becomes possible to have a smooth and economically durable transition. The amount of new gases added may be dependent on the availability,...

Evolution of beach profiles under random waves

Cross-shore sediment transport is an important phenomenon in coastal engineering, which mainly accounts for the short-term changes in the coastline. To study on- and offshore transport the evolution of the beach profile is considered. For investigation of the beach profile small-scale physical models are often used. A problem in using a physical...