Asynchronous Hyperbolic UWB Source-Localization and Self-Localization for Indoor Tracking and Navigation

Hyperbolic localization measures the time difference of arrivals (TDOAs) of signals to determine the location of a wireless source or receiver. Traditional methods depend on precise clock synchronization between nodes so that time measurements from independent devices can be meaningfully compared. Imperfect synchronization is often the dominant...

Absolute distance interferometry for wafer-stage applications

Future industrial lithography machines will use interferometers for wafer-stage position metrology. Interferometers suffer from phase wrapping, which is why in this thesis an absolute phase detection system has been developed. The absolute phase detection system will use two lasers, with the second laser allowing for limited changes in the...

Optical Distance Measurement

This report details research, design, and implementation of a distance measuring subsystem for a pre existing patient monitoring platform. This platform is used to monitor vitals and the general situation regarding the elderly, people in care facilities, and babies in NICU’s (Neonatal Intensive Care Units). Every monitoring unit contains a GPS,...

High-precision frequency sweeping interferometry for absolute distance measurement using a tunable laser with sweeping range of 88 GHz

Distance measurement using frequency sweeping interferometry is an absolute distance measurement technique that allows for high accuracy over long distances. Notwithstanding, the measurement accuracy is affected by laser sweeping nonlinearity and limited sweeping range. In this work, an optimized post-processing linearization method is...

A 280 μW Dynamic Zoom ADC With 120 dB DR 118 dB SNDR in 1 kHz BW

This paper presents a dynamic zoom analog-to-digital converter for use in low-bandwidth (<1 kHz) instrumentation applications. It employs a high-speed asynchronous successive approximation register (SAR) ADC that dynamically updates the references of a fully differential Δ Σ ADC. Compared to previous zoom ADCs,...

Development of a Low-Cost, Solid-State, Line-Laser Distance Sensor: An Integrated Approach

Many robotic systems rely on laser ranging sensors to navigate and map their environment. As robots are getting more advanced, smaller and cheaper, their sensors need to decrease in size and cost, while increasing their reliability and accuracy. Current laser-based sensors have difficulty to meet these properties. They are either large,...

High-accuracy absolute distance measurement with a mode-resolved optical frequency comb

Optical interferometry enables highly accurate non-contact displacement measurement. The optical phase ambiguity needs to be resolved for absolute distance ranging. In controlled laboratory conditions and for short distances it is possible to track a non-interrupted displacement from a reference position to a remote target. With large...

3D Face Recognition: How to make a fast and reliable database and compare the database with 2D+3D facial input?

A 3D face recognition algorithm has been developed for the Microsoft Kinect during the final bachelor project at Delft University of Technology in 2013. The aim of the project is to develop a prototype face recognition system. The prototype system has to outperform the existing 2D face recognition system. The main goal is to develop a 3D face...

High-accuracy absolute distance metrology

Abstract not available

DME-derived positions compared with MLS- and ILS-derived positions

From recorded Distance Measurement Equipment (DME) data during Microwave Landing System (MLS) flight trials performed at London Gatwick Airport (April 21 - 26, 1989) using the NLR Fairchild Metro II Laboratory Aircraft, the position of the aircraft was determined by post-processing and compared with the MLS- and ILS-derived positions. This...

Flight testing in the Netherlands, an overview

This report gives an overview of the flight test activities and capabilities in The Netherlands. A general description of the flight test programs of the last decades with civil and military aircraft, helicopters and research aircraft will be given. Some of the highlights of the more recent programs will be presented, i.e. the type certification...