References of "Collette, Jean-Paul"
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See detailLow Concentration Solar Array Experiment on-board PROBA-2
Ruelle, V.; Rossi, Laurence ULg; Thibert, Tanguy ULg et al

in Proceedings of the 8th Space Power Conference (2008, September)

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See detailSolar concentrator
Habraken, Serge ULg; Ruelle, Vincent; Collette, Jean-Paul ULg

Patent (2008)

Space solar concentrator with deployable reflectors

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See detailSolar Concentrator
Habraken, Serge ULg; Defise, Jean-Marc ULg; Collette, Jean-Paul ULg

Patent (2008)

A combination of lens and mirror for solar concentration is presented.Collection efficiency, uniformity and compactness are the main goals

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See detailPortable x-ray fluorescence spectrometer for coating thickness measurement
Carapelle, Alain ULg; Fleury-Frenette, Karl ULg; Collette, Jean-Paul ULg et al

in Review of Scientific Instruments (2007), 78(12),

A handheld x-ray spectrometer has been realized and tested. The purpose of the device is to measure the thickness of coated samples in the range of 1-1500 nm in an industrial environment. Accuracy of ... [more ▼]

A handheld x-ray spectrometer has been realized and tested. The purpose of the device is to measure the thickness of coated samples in the range of 1-1500 nm in an industrial environment. Accuracy of similar to 3% has been achieved in this range with a measurement time of 1 min. Automated software has been implemented to allow utilization by a nonspecialist operator. An automated calibration procedure, based on measurements of reference samples, is used. (C) 2007 American Institute of Physics. [less ▲]

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See detailQuantitative accelerated life testing of MEMS accelerometers
Bazu, Marius; Gălăţeanu, Lucian; Ilian, Virgil Emil et al

in sensors (2007), 7(11), 2846

Quantitative Accelerated Life Testing (QALT) is a solution for assessing the reliability of Micro Electro Mechanical Systems (MEMS). A procedure for QALT is shown in this paper and an attempt to assess ... [more ▼]

Quantitative Accelerated Life Testing (QALT) is a solution for assessing the reliability of Micro Electro Mechanical Systems (MEMS). A procedure for QALT is shown in this paper and an attempt to assess the reliability level for a batch of MEMS accelerometers is reported. The testing plan is application-driven and contains combined tests: thermal (high temperature) and mechanical stress. Two variants of mechanical stress are used: vibration (at a fixed frequency) and tilting. Original equipment for testing at tilting and high temperature is used. Tilting is appropriate as application-driven stress, because the tilt movement is a natural environment for devices used for automotive and aerospace applications. Also, tilting is used by MEMS accelerometers for anti-theft systems. The test results demonstrated the excellent reliability of the studied devices, the failure rate in the “worst case” being smaller than 10-7h-1. [less ▲]

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See detailRELIABILITY ACCELERATED TESTING OF MEMS ACCCELEROMETERS
Bazu, Marius; Gălăţeanu, Lucian; Ilian, Virgil Emil et al

in IEEE Sensors Journal (2007), 1

An attempt to assess the reliability of a batch of MEMS accelerometers is presented. The testing plan is application oriented and contains combined tests: thermal and mechanical stresses (two variants ... [more ▼]

An attempt to assess the reliability of a batch of MEMS accelerometers is presented. The testing plan is application oriented and contains combined tests: thermal and mechanical stresses (two variants: vibration and tilting) were used. The results demonstrated the good reliability of the tested device, the failure rate being smaller than 6.10-8h-1. [less ▲]

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See detailComparison between finite element calculations and holographic interferometry measurements, of the thermo-mechanical behaviour of satellite structures in composite materials
Thizy, Cédric ULg; Lemaire, Philippe ULg; Georges, Marc ULg et al

in Zhang, G.; Kip, D.; Nolte, D. (Eds.) et al Photorefractive Effects, Materials, and Devices (2005, July)

The stability requirements for the satellite structures evolve increasingly. To predict this one during the design phase a more and more used tool is the finite element calculation of thermo-elastic ... [more ▼]

The stability requirements for the satellite structures evolve increasingly. To predict this one during the design phase a more and more used tool is the finite element calculation of thermo-elastic models. The verification by measurement of these predictions on operational systems or testing rods is a key element allowing to validate these calculations and also to improve the simulations in order to study more complex cases in a reliable manner. We present the results of such a comparative study carried out on prototype structures using dynamic holographic interferometry, based on a sillenite photorefractive crystal, to measure the thermo-mechanical behavior [less ▲]

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See detailSolar Concentrator
Habraken, Serge ULg; Defise, Jean-Marc ULg; Collette, Jean-Paul ULg

Patent (2005)

A concentrator based on a combination of Fresnel lens and mirror to incresa the efficiency and uniformity

Detailed reference viewed: 34 (2 ULg)
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See detailSolar Concentration
Collette, Jean-Paul ULg; Defise, Jean-Marc ULg; Habraken, Serge ULg

Patent (2004)

We propose a solar concentrator based on a combination of Fresnel lens and reflectors. This architecture allows for a better light distribution and a thinner lighweight concentrator.

Detailed reference viewed: 32 (3 ULg)
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See detailSolar Concentrator
Collette, Jean-Paul ULg; Defise, Jean-Marc ULg; Habraken, Serge ULg

Patent (2004)

A solar concentrator based on multi V shape reflectors is proposed to reduce the PV cell area (and cost). The optimisation is for space concentration purpose but extendable to terrestrial system.

Detailed reference viewed: 52 (6 ULg)
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See detailSolar Concentrator
Collette, Jean-Paul ULg; Defise, Jean-Marc ULg; Habraken, Serge ULg

Patent (2003)

A space solar concentrator based on light weight reflectors

Detailed reference viewed: 21 (3 ULg)