Heart rate analysis using BCG: Determining the heart rate with an under the mattress sensor

In this paper we will research the possibility, reliability and accuracy of calculating the heart rate of a patient at rest using Ballistocardiography in clinical settings. The vital signs of the patient will be extracted by using piezoelectric sensor which is embedded in a Bedsense device developed by Momomedical. The device developed by...

Bed Exit Prediction

This report presents a bed exit prediction model using a decision tree classifier, a machine learning method. This system is designed to alarm a caregiver in a nursing home to prevent bed­ falls among institutionalized elderly. For the input of this algorithm, features are derived from four force sensing resistor sensors and six piezoelectric...

Noninvasive Respiratory Analysis using Piezoelectric Sensor Array: A BSc Thesis

In this study multiple design approaches have been tried to accurately determine the respiratory rate every 30 seconds of a patient in a hospital bed using six piezoelectric pressure sensors located sand­wiched between the mattress and the bed. After four design iterations using a variety of different methods, a final design using a Least Mean...

Design of a deep sea LiDAR system: Beam steering design

Though several sensors are available for underwater scanning and ranging, they all have their limits. SONAR sensors are limited in resolution, and scanning mechanisms using a form of light for carrying the data suffer from high attenuation in turbid waters. <br/> <br/>The goal of this project was to design a LiDAR system that is capable of...

Design of a deep sea LiDAR system: Laser Pulse transmission

Current subsea LiDAR implementations are inherently depth limited, and make LiDAR applications in the deep-sea costly. To this end, the SLiDAR project aims to develop a pressure tolerant LiDAR system for use at any ocean depth. This thesis elaborates the design and implementation of the laser pulse transmission of the LiDAR and the circuit which...

Non-intrusive patient monitoring to prevent pressure ulcers: Algorithm Subgroup

The founders of Momo Medical envisioned a health care product that would help nurses worldwide with pressure ulcer prevention. Pressure ulcers are a chronic wound that affects the skin of patients who do not regularly change bed posture. As it currently stands, nurses lack the manpower and time to change the postureof patients in a timely manor....

Non-intrusive patient monitoring for pressure ulcer prevention: Group F - Test Group

Problem Definition<br/>This bachelor final project was an assignment given by the start up Momo Medical named: "Improving health care with technology". This project was to use their existing technology and ideas to create a system to prevent pressure ulcers. Pressure ulcer are the medical condition that happens when a patient is left too long in...

Non-intrusive patient monitoring to prevent pressure ulcers: Sensor Subgroup: Creating a sensor solution

Pressure ulcers are wounds that arise when a person sits or lays in the same posture for an extended period of time. Starting from the skin and possibly continuing to the bone, tissue slowly decays when the pressure keeps being applied to the same spot. Prevention is the best method of treating the ulcers and it is done by regularly changing...

Development of an acoustic channel model for a shallow water environment: Propagation model of an underwater acoustic signal

This thesis shows the successful development of an acoustic channel model to be used for optimisation of localisation. It uses an eigenray approximation, implemented as the image source method to determine a channel impulse response. The image source method however limits the model to environments which can be reduced to cuboid shaped rooms as...

Validation of models for use in localisation

Underwater robotics face an interesting challenge. Since electromagnetic waves barely propagate underwater, systems like GPS are unusable. However, for a robot to function autonomously, it needs to be able to know its position. Because of this, using acoustic waves for transmitting signals underwater has been established to be the way forward....

Modelling the effects of hardware for devices used in an underwater acoustic positioning system based on channel estimation

When modelling the propagation of an underwater acoustic signal the effects of the hardware that generated and detected it need to be taken into account. This enables one to isolate and remove the effects of the hardware on a channel measurement test signal when performing underwater localisation, allowing for a more effective analysis of the...

Het ontwerp van Smart Shelf Labels voor LEDSpeak

Leds zorgen voor een revolutie op het gebied van verlichting. Vergeleken met gloeilampen zijn ze meer energiezuinig en kunnen ze sneller schakelen. Dat maakt energie-efficiënte lichtcommunicatie mogelijk. Het onderwerp van ons onderzoek is “communicatie via leds”. Wij passen dit toe in de automatisering van prijsaanduidingen in warenhuizen, door...

Haalbaarheidsstudie naar het gebruik van software-defined radar voor een adaptieve cruisecontrol

Een onderzoek naar radartheorie om te gebruiken in een adaptive cruise control systeem.