document

FLEX: An imaging spectrometer for measurement of vegetation fluorescence

Smorenburg, K. (author), Visser, H. (author), Court, A.J. (author), Stoll, M.P. (author), Technisch Physische Dienst TNO - TH (author)

Detection of vegetation fluorescence gives information about plant functioning, stress and vitality. During the past decades several ground based laser fluorosensors have been developed to investigate these processes and to demonstrate the value of this technique. FLEX (= FLuorescense EXplorer) is a space mission to measure the fluorescence of...

conference paper 2017

document

Various acoustic aspects of buildings with lightweight elements

Gerretsen, E. (author), Technisch Physische Dienst TNO - TH (author)

public lecture 2008

document

POD Generator: Development of numerical modeling tools for quantitative assessment of the performance of non-destructive inspection techniques

Krom, A.H.M. (author), Mast, A. (author), Volker, A.W.F. (author), Bloom, J.G.P. (author), Technisch Physische Dienst TNO - TH (author)

conference paper 2008

document

Overdracht van lucht-, contact- en installatiegeluid bij lichte bouwsystemen

Gerretsen, E. (author), Technisch Physische Dienst TNO - TH (author)

conference paper 2008

document

Correlation factors between European and World harmonised test cycles for heavy-duty engines

Technisch Physische Dienst TNO - TH (author), Verbeek, R.P. (author), Ligterink, N.E. (author), Dekker, H.J. (author)

report 2008

document

MIBS past present and future

Technisch Physische Dienst TNO - TH (author), Leijtens, J.A.P. (author), Hoegaerts, C.L.G. (author), Barros, J. (author), de Vries, J. (author)

The microbolometer spectrometer breadboard MIBS is a prism spectrometer that uses an uncooled microbolometer detector array and has been designed for the ESA EarthCARE mission. In order to demonstrate its feasibility a breadboard has been build, and tests have been performed that show good correlation between predicted and achieved results....

conference paper 2007

document

Groot in het kleine: kijk op nano en litho

Technisch Physische Dienst TNO - TH (author)

book 2006

document

High fidelity real-time simulator with mixed real and virtual sensors

Papp, Z. (author), Dorrepaal, M. (author), Thean, A.H.C. (author), van Elk, M.G. (author), Technisch Physische Dienst TNO - TH (author)

The advance in interactive/cooperative robotics and integration of robots into populated environments puts emphasis on robot-robot and robot-environment (incl. human) interactions. Sensing and sensory data interpretation play ever increasing role because sensing becomes the primary way of collecting information about the environment. In this...

conference paper 2005

document

Recommendations for blood pressure measuring devices for office/clinic use in low resource settings

Parati, G. (author), Mendis, S. (author), Abegunde, D. (author), Asmar, R. (author), Mieke, S. (author), Murray, A. (author), Shengelia, B. (author), Steenvoorden, G. (author), van Montfrans, G. (author), O'Brien, E. (author), Technisch Physische Dienst TNO - TH (author)

This paper, which summarizes the conclusions of a WHO Expert meeting, is aimed at proposing indications to develop technical specifications for an accurate and affordable blood pressure measuring device for office/ clinic use in low resource settings. Blood pressure measuring devices to be used in low resource settings should be accurate,...

article 2005

document

Predictions of flow and heat transfer in multiple impinging jets with an elliptic-blending second-moment closure

Thielen, L. (author), Hanjalić, K. (author), Jonker, H. (author), Manceau, R. (author), Technisch Physische Dienst TNO - TH (author)

We present numerical computations of flow and heat transfer in multiple jets impinging normally on a flat heated surface, obtained with a new second-moment turbulence closure combined with an elliptic blending model of non-viscous wall blocking effect. This model provides the mean velocity and turbulent stress fields in very good agreement with...

article 2005

document

Approximate realization of valve dynamics with time delay

Technisch Physische Dienst TNO - TH (author), van Helvoirt, J. (author), Bosgra, O. (author), de Jager, B. (author), Steinbuch, M. (author)

This paper describes the model identification of control valve dynamics with a time delay. An experimental set-up is used to perform both frequency response and step response measurements on the control valve. An approximate realization algorithm and a new time delay estimation method are applied on the experimental data. The results illustrate...

conference paper 2005

document

Erratum: Designing fractional factorial split-plot experiments with few whole-plot factors (Journal of the Royal Statistical Society. Series C: Applied Statistics (2004) 53 (325-339))

Technisch Physische Dienst TNO - TH (author), Bingham, D.R. (author), Schoen, E.D. (author), Sitter, R.R. (author)

article 2005

document

Absolute distance metrology for space interferometers

Technisch Physische Dienst TNO - TH (author), Swinkels, B.L. (author), Latoui, A. (author), Bhattacharya, N. (author), Wielders, A.A. (author), Braat, J.J.M. (author)

Future space missions, among which the Darwin Space Interferometer, will consist of several free flying satellites. A complex metrology system is required to have all the components fly accurately in formation and have it operate as a single instrument. Our work focuses on a possible implementation of the sub-system that measures the absolute...

conference paper 2005

document

Tin oxide precursor chemistry and its link to coating properties

TNO Industrie en Techniek Technisch Physische Dienst TNO - TH (author), van Mol, A.M.B. (author), Alcott, G.R. (author), Allendorf, M.D. (author)

The chemical vapor deposition technique to optimize the manufacture of SnO2 coated glasses was presented. SnO2 growth rates for several precursors were examined and their relative magnitudes were compared with the properties of the deposit, taking into account the chemical nature of the precursor. A set of growth rates and the morphological data...

article 2005

document

Orifice impedance under grazing flow measured with a single microphone method

Kooijman, G. (author), Golliard, J. (author), Hirschberg, A. (author), Technisch Physische Dienst TNO - TH (author)

The effect of one-sided grazing mean flow on the acoustical impedance of rectangular orifices is measured at low Mach number and low Helmholtz number by means of a single microphone method. The results are fairly consistent with previous experimental results obtained by means of a two-microphone impedance tube. Furthermore no significant...

conference paper 2004

document

Nulling at TNO TPD: Status update

Vosteen, L.L.A. (author), Vink, H.J.P. (author), Doelman, N.J. (author), Doppenberg, E.J.J. (author), Bokhove, H. (author), Technisch Physische Dienst TNO - TH (author)

TNO TPD has an extensive experience in the realisation of highly stable passive and active opto-mechanical systems. Future missions of ESA like DARWIN [1] rely heavily on these systems such as metrology equipment, delay lines, nulling equipment etc.. The nulling equipment will be used in the Nulling mode of DARWIN in which it will detect Earth...

conference paper 2004

document

Micro digital sun sensor: System in a package

de Boom, C.W. (author), Leijtens, J.A.P. (author), van Duivenbode, L.M.H. (author), van der Heiden, N. (author), Technisch Physische Dienst TNO - TH (author)

A novel micro Digital Sun Sensor (μDSS) is under development in the frame of a micro systems technology (MST) development program (Microned) from the Dutch Ministry of Economic Affairs. Use of available micro system technologies in combination with the implementation of a dedicated solarcell for power supply and a wireless link for data...

conference paper 2004

document

Progress in EUV optics lifetime expectations

Mertens, B.M. (author), Weiss, M. (author), Meiling, H. (author), Klein, R. (author), Louis, E. (author), Kurt, R. (author), Wedowski, M. (author), Trenkler, H. (author), Wolschrijn, B.T. (author), Jansen, R. (author), van de Runstraat, A. (author), Moors, R. (author), Spee, C.I.M.A. (author), Plöger, S. (author), van de Kruijs, R. (author), Technisch Physische Dienst TNO - TH (author)

Optics lifetime and contamination is one of the major challenges for extreme ultraviolet (EUV) lithography. The basic contamination and lifetime limiting processes are carbon growth and oxidation of the mirrors. Without appropriate measures, optics lifetime will be limited to a few hours. Within the EUV α-tool project of ASML and Carl Zeiss,...

article 2004

document

Microbolometer spectrometer: The multi purpose smallsat instrument

Leijtens, J.A.P. (author), Court, A.J. (author), de Boom, K. (author), Technisch Physische Dienst TNO - TH (author)

Due to lower mass, size and power demands and recognized increased reliability, microbolometer detectors seem to be well suited for small sattelite applications. Due to the improving technical performance, next generation instruments can use uncooled microbolometer arrays without significantly sacrificing performance. An example of this type of...

conference paper 2004

document

Optimal and robust feedback controller estimation for a vibrating plate

Fraanje, P.R. (author), Verhaegen, M. (author), Doelman, N.J. (author), Berkhoff, A. (author), Technisch Physische Dienst TNO - TH (author)

This paper presents a method to estimate the H2 optimal and a robust feedback controller by means of Subspace Model Identification using the internal model control (IMC) approach. Using IMC an equivalent feed forward control problem is obtained, which is solved by the Causal Wiener filter for the H2 optimal controller. The robust variant, called...

article 2004