2,770 Works

I2.4 - Perception Range Prediction for IR Pilot Sight

Robert Weiss
The new helicopters of the Bundeswehr, the UH Tiger and the NH-90, are equipped with a far-infrared Pilot Sight Unit (PSU). This sensor is used for both navigation and obstacle avoidance. At the beginning of our project, there was no established procedure to predict the IR viewing range under given weather conditions. Aviation safety guidelines, however, require a pre-flight assessment of prevalent viewing conditions for a given sensor. A high priority project was started by...

P2.1 Messgenauigkeit und Reproduzierbarkeit bei der Messung der Brillouin-Frequenzverschiebung für die faseroptische Bestimmung der Temperaturverteilung

A. Wosniok
Auf der Grundlage der in DIN EN 61757-2-2:2017 beschriebenen Standardisierungsmethoden wurden in dieser Arbeit wichtige Leistungsparameter von vier kommerziellen Messsystemen zur ortsaufgelösten faseroptischen Erfassung der temperatur- und dehnungsabhängigen Brillouin-Frequenzverschiebung untersucht. Gemäß der oben genannten Norm konzentrierte sich hier die Ermittlungsprüfung auf messtechnische Aspekte reiner Temperaturmessungen. Dabei diente die Ermittlung von einem festgelegten Satz dreier Betriebsverhaltenskenngrößen in Form von quantitativen Angaben des Messfehlers, der Wiederholgenauigkeit sowie der räumlichen Unsicherheit einem Vergleich der getesteten Messsysteme. Alle faseroptischen...

P1NM.14 - Percolating metallic structures templated on laser - deposited carbon nanofoams derived from graphene oxide: Applications in humidity sensing

S. Nufer, A. B. Dalton, J. P. Salvage, A. Shmeliov & A. Brunton
Carbon nanofoam (CNF) is a low-density, high-surface-area material formed by aggregation of amorphous carbon nanoparticles into porous nanostructures. We report the use of a pulsed infrared laser to prepare CNF from a graphene oxide (GO) target material. Electron microscopy shows that the films consist of dendritic strings which form web-like three-dimensional structures. The conductivity of these structures can be modified by using the CNF as a nanostructured scaffold for gold nanoparticles deposited by sputter coating,...

D4.3 - Silicon probing tips coated with protective aluminum oxide thin films for fast tactile cantilever sensors

H. S. Wasisto, F. Yu, M. A. Deeb, L. Doering, U. Brand, A. Bakin, A. Waag, E. Peiner & St. Völlmeke
Silicon microprobe tips are fabricated and integrated with piezoresistive cantilever sensors for fast surface roughness scanning systems. A combination of wet and inductively coupled plasma (ICP) cryogenic dry etching processes is employed to create high-aspect-ratio tips. For the wear-resistant tip coatings, atomic-layer deposition (ALD) technique is applied to deposit conformal ~14 nm thick aluminum oxide (Al2O3) layers using a binary reaction sequence in low thermal process with precursors of trimethyl aluminum (TMA) and water (H2O)....

AR2.2 - “Chemical gamut” and implications for describing the analytical capability of sensor arrays

K. J. Johnson & A. C. Knapp
There is a general lack of systematic, generally applicable metrics for expressing the capability of arrays of partially selective sensors for chemical analysis. Such metrics would allow for objective comparison of widely different array technologies and efficient optimization of such arrays for uncertain, complex sensing tasks. This work explores the use of concepts and formalisms from the field of color theory for use in describing analytical capability of chemical sensor arrays.

5.3.2 - Ultraschall-Reflexionsmessungen zur Bestimmung der Füllstoffverteilung in Kunststoff-Compounds

S. Wöckel, H. Arndt, U. Steinmann, J. Auge, K. Dietl, G. Schober, C. Kugler & T. Hochrein
Der Beitrag stellt die Kombination der Ultraschall-Reflexions-Methode mit einer statistischen Signal-auswertung zur Charakterisierung der Dispergiergüte von Füllstoffen in Kunststoffschmelzen vor. Das Verfahren basiert auf der Erfassung der Streuung an bewegten Partikeln bei hohen Konzentrationen oder Medien hoher Grunddämpfung. Anhand der linearen Approximation der Standardabweichung der zeitabhängigen Amplitude der Reflexionssignale lassen sich zwei Kennwerte (σmax - Streuleistungs-äquivalent und Δσ - Dämpfungsäquivalent) ableiten. Diese korrelieren mit der Partikel-Streudämpfung und liefern ähnliche Informationen wie die Extinktionsdämpfung konventioneller Transmissionsverfah-ren...

AP4.5 - Detecting breath and skin emitted tracers of humans with flame-made sensor arrays

N. J. Pineau, A. T. Guentner, S. E. Pratsinis, P. Mochalski, H. Wiesenhofer, C. A. Mayhew & A. Agapiou
Earthquakes are lethal natural disasters frequently burying people alive under collapsed buildings. Tracking entrapped humans from their unique volatile chemical signature with hand-held devices would accelerate urban search and rescue (USaR) efforts. Here, a compact and orthogonal sensor array has been designed to detect the breath- and skin-emitted metabolic tracers acetone, ammonia, isoprene, CO2 and RH, all together serving as sign of life. It consists of three nanostructured metaloxide sensors (Si-doped WO3, Si-doped MoO3 and...

P1.9.18 A MEMS based compact natural gas analyzer implementing IEEE-1451.2 and BS-7986 smart sensor standards

S. Udina, J. Bosch, A. Pardo, C. Calaza & S. Marco
A compact natural gas analyzer prototype is presented which incorporates several advanced features. In first place a very recently reported MEMS sensing technology for properties determination of natural gas mixtures is implemented. Besides, the prototype is a very complete smart instrument incorporating fault detection, selfidentification to a network and measurement quality metrics (self validation or SEVA), provided by the combination of the IEEE-1451 and BS-7986 smart sensor standards. Experimental measurements are presented for calibration and...

P7.11 - Neuartige Gold-Nanokomposite für chemiresistive Sensoren

Y. Daskal, R. Dittrich, C. Himcinschi, G. Gärtner, B. Abendroth, J. Walter & Y. Joseph
Wir haben neuartige Goldnanopartikelnnetzwerke mit verschiedenen aromatischen Molekülen (1,4-Benzenedithiol, 1,4-Benzenedimethanethiol, Biphenyl-4,4'-dithiol und p-Terphenyl-4,4''-dithiol) verlinkt auf silanisierten Glas oder Siliziumsubstraten entweder automatisch mit einer Durchflußzelle, oder manuell durch aufschleudern und lagenweise Selbstassemblierung hergestellt. Die resultierenden dünnen Filme sind mittels Röntgen-Photoelektronenspektroskopie charakterisiert worden. Die Messungen zeigten die chemische Zusammensetzung sowie den Vernetzungsgrad der Komposite. Oberflächenverstärkte Ramanspektroskopie, oberflächenverstärkte Infrarot-Absorption, Ellipsometrie und die UV/Vis-Spektroskopie wurden verwendet, um die optischen Eigenschaften der Komposite zu vermessen. Schließlich wurden die chemisensorischen Eigenschaften...

BS6.4 - A fluorescent biosensor based on molybdenum disulfide (MoS2) nanosheets and protein aptamer for sensitive detection of carcinoembryonic antigen

L. Zhao, M. Cheng, G. Liu, H. Lu, Y. Gao & G. Lu
Simple, rapid, sensitive detection of tumor biomarker carcinoembryonic antigen (CEA) is of great importance for the screening, diagnosis and prognosis evaluation of various gastroenteric tumor. This paper presents a "turn-on" flourescent biosensor based on molybdenum disulfide(MoS2) nanosheets and fluorophore labeled protein aptamer for rapid and sensitive detection of CEA protein. CEA aptamer probe can be adsorbed on the surface of MoS2 nanosheets in close proximity via van der Waals force, triggering fluorescence resonance energy transfer,...

11.1 - Intelligent Networked Flight Test Instrumentation for a new Fighter Prototype

G. Martínez Morán
Airbus Defence & Space treasures more than 10 years of expertise in implementing fully network based flight test instrumentations (FTI). The developments accomplished during this long walk have brought to fruition very flexible and versatile FTI. Big platform programs (such as C295, A330-MRTT and A400M) have been taking good advantage from these features. Transferring these features to a smaller aircraft (such as a fighter) has been the last challenge achieved. Restrictions due to the lack...

8.4.2 Gas Sensing Properties of Novel CuO Nanowire Devices

S. Steinhauer, E. Brunet, T. Maier, G. C. Mutinati, A. Köck & O. Freudenberg
We report on novel gas sensing devices which are realized by the on-chip synthesis of cupric oxide (CuO) nanowires during the thermal oxidation of electroplated copper microstructures. By this method, it is possible to fabricate conductometric gas sensors with an electrical resistance dominated by a multitude of suspended CuO nanowires resulting in a huge sensor surface area. For these devices, resistance changes during exposure to different oxygen concentrations, to relative humidity and to small concentrations...

Ortsaufgelöste in-situ Beladungsdiagnose von Diesel-Partikelfiltern

G. Hagen, A. Piontkowski, A. Müller, D. Brüggermann & R. Moos
Der Einsatz von Partikelfiltern in dieselbetriebenen Fahrzeugen ist notwendig, um die strengen gesetzlichen Emissionsgrenzwerte einzuhalten. Dabei wird im diskontinuierlichen Betrieb ein im Abgasstrang eingebautes Filterelement mit Ruß beladen und mit erhöhtem Kraftstoffaufwand durch Erhöhung der Abgastemperatur wieder regeneriert. Für den effizienten Betrieb eines solchen Systems, also z.B. zur Bestimmung eines geeigneten Regenerationszeitpunkts, ist es wünschenswert, die im Filter enthaltene Rußmenge und deren Verteilung genau zu kennen. Durch Kontaktierung einzelner Kanäle innerhalb des Filters konnte eine...

P1.10 HTCC-Multilayerbasierte Ionensensitive Sensoren für die Wasseranalyse

C. Feller, U. Partsch & S: Körner
Auf Basis eines mikrosystemtechnischen Ansatzes wurden elektrochemische Sensoren für die Wasseranalyse entwickelt. Zur Erfassung der verschiedenen Messgrößen sind spezielle Dickschichtpasten entwickelt worden, die für die Erzeugung sensitiver Funktionsschichten auf einem HTCC-Multilayer siebgedruckt werden. Je nach Anwendungsgebiet sind die sensitiven Schichten auf dem Sensorarray beliebig austauschbar. Für die Erfassung der Messgrößen pH-Wert, Cu2+-Schwermetallion sowie der Kationen Ca2+, NH4+ und K+ in wässrigen Lösungen erfolgte eine Materialund Prozessentwicklung, um ionensensitive Dickschichtmembranen auf der keramischen Sensorplattform abzuscheiden. Alle...

4.1 - Intensity Referencing and Response Linearization in an Optical-Reflection-Based Distance Sensor System for White-Goods Applications

J. Baumer, J. Schenkl & M. Shamonin
A reflective optical sensor system for distance measurements in white–goods applications is presented. The technical solution implements a well-known intensity referencing principle - the optical bridge - in a low-cost design. The influence of the ambient temperature can be compensated for. The spurious effects such as slow output drift caused by aging of optical components or the variation of the system sensitivity due to the parameter spreading of system components can be successfully overcome as...

P3.05 - Reduktion der Ansprechzeit Hydrogel-basierter Sensoren

S. Binder, A. T. Krause & G. Gerlach
Die Leistungsfähigkeit Hydrogel-basierter Sensoren im Vergleich zu herkömmlichen biochemischen Sensoren ist bislang vor allem durch deren lange Ansprechzeiten eingeschränkt. Ursache der hohen Zeitkonstanten sind die für Polymere bzw. Hydrogele typischen Diffusionsprozesse, welche beim Quellen und Entquellen des Hydrogels als chemomechanischem Wandler zum Tragen kommen. In dieser Arbeit soll die Anwendung der Kraftkompensationsmethode dem entgegenwirken. Dazu wird in Verbindung mit einem MEMS-Drucksensor als mechanoelektrischem Wandler eine neue Methode der Kraftkompensation vorgestellt. Grundlage dieses Ansatzes bildet ein...

1.4.3 Concepts for accurate electrical conductivity measurement of liquids in industrial process analytics

M. Vogt, S. Hidalgo, T. Musch, M. Mallach, T. Lange & J. Förster
desalination, cleaning, mixing of different liquids, analysis of acids and bases, etc. In this contribution, specifically two-electrode conductivity sensors are discussed. A problem with this type of sensor is that a double layer (DL) is given at the interfaces between each of the electrodes and the liquid, resulting in varying and unpredictable diffusion capacitances. For this reason, the electrical resistance of the liquid is not directly accessible from measurements of the sensor input impedance at...

P3.12 Integration of Bragg grating sensors in components made of Carbon fiber reinforced polymers

T. Sauer, S. Kefer, W. Ruppert, R. Hellmann & M. Kaloudis
This contribution discusses the integration of polymer planar Bragg grating sensors (PPBG) into carbon fiber reinforced polymer (CFRP) components. For the first time, it is shown that PPBGs based on cyclic olefin copolymers can be integrated into commercial-grade composites, thereby withstanding the demanding production processes. Pre-impregnated fibers are stacked and partially modified to form a sensor pocket. Afterwards, the CFRP specimen containing the optical sensor is cured in a heated mechanical press for 2 hours...

BS5.2 - Development of Rapid Assays for Detection and Identification of Pathogenic Bacteria

S. F. Y. Li & H. Li
Bacterial contamination in water and food poses serious hazards worldwide and the rapid detection of pathogenic bacteria is critical to the prevention and identification of problems related to public health and safety. This study focuses on the development of rapid detection assays by using biosensors for rapid, sensitive, specific pathogens detection in water or complex food matrices. Quartz crystal microbalance biosensors with different bio-recognition elements, strategies for improved sensitivity by nanomaterials, sample preparations to eliminate...

P2.4.18 MBE growth of GaN nanowires on Si(111) substrates for gas sensor applications

Z. R. Zytkiewicz, M. Sobanska, K. Klosek, A. Reszka, A. Wierzbicka, R. Kruszka, K. Golaszewska, M. Setkiewicz & T. Pustelny
GaN nanowires (NWs) were grown on Si(111) substrates by plasma-assisted molecular beam epitaxy (PAMBE). The NWs nucleated spontaneously, no catalyst was used for their growth. SEM studies show that the NWs are homogenously distributed and well aligned with the c-axis being perpendicular to the substrate, while TEM analysis reveals their high crystalline quality. No GaN wetting layer between NWs was detected. Two types of NWs-based gas sensors were prepared. Our preliminary tests in NO2, NH3...

5.4 - Multi-Band (Ku, C, Wideband - Satcom, Narrowband Satcom) Telemetry Test System for UAV Application

M. Imay
This paper describes the design, development, production of fully autonomous UAV data link test system. The ethernet based data link systems consist of Ku-Band, C-Band, Wideband-Satcom and Narrow-Band Satcom. Ground control station and all airborne hardware systems with simulation, monitoring capability that are be integrated into these telemetry test systems. Integration of GCS, Airborne hardware system and network based telemetry system with handover capability of UAV aircraft are also included in this paper. These test...

A7.1 - FLEXIBLE FREE STANDING SU-8 MICROFLUIDIC IMPEDANCE SPECTROSCOPY SENSOR FOR 3D MOLDED INTERCONNECT DEVICES APPLICATION

M.-P. Schmidt, A. Oseev, A. Brose, C. Engel & S. Hirsch
Current contribution reports a new microfluidic impedance spectroscopy sensor that is applicable for direct attachment on 3D molded interconnect devices (3D-MID). The Sensor is made of flexible SU-8 polymer featured by the system of electrodes structured directly on SU-8. Sensor chip is able to be directly soldered on MID due to electroless plated Nickel contact pads. Due to opposite electrodes design and one side direct shielded attachment, sensor is able to be applied for measurements...

P1BS.3 - Modification of Optical Interferometers with Functional Polymers and Hydrogels for Sensing of Protein Biomarkers

S. Kurzhals, E. Melnik, F. Strasser, P. Muellner, R. Heer, R. Hainberger & G. Koppitsch
Surface modification of Mach-Zehnder interferometers with biotin-modified polyethylenimine (PEl-B) and PEI-B loaded hydrogels can give access to biosensors combining highly binding matrices with low non-specific interactions, useful for protein biosensing. Permeability of hydrogel layers prepared by photocrosslinking depends on used precursors as well as crosslinking conditions. Protein loading capacity is probed for both functionalization strategies showing high initial response for directly modified surfaces and linear response with receptor concentration for sensors modified with receptor loaded...

P1.6.5 NASICON-based CO2 sensor operative at room temperature with Li2CO3-based auxiliary as a sensing electrode

Kenji Obata & Shigenori Matsushima
A Potentiometric NASICON (Na3Zr2Si2PO12)-based CO2 sensor operative at room temperature was fabricated by combining with a metal oxide (ITO: indium tin oxide) and Li2CO3-In2O3 (4:1 in molar ratio) auxiliary as a sensing electrode, and its CO2 sensing properties were examined under 30% RH (relative humidity) in the temperature range of 30 to 100 °C. When the Li2CO3-In2O3-attached sensor was operated in the range of 250 to 2500 ppm CO2 at 30 °C, the EMF (electromotive...

1.2.5 Optimization of Spirulina Biofilm for in-situ Heavy Metals Detection with Microfluidic-Acoustic Sensor and AFM

N. Tekaya, H. Gammoudi, V. Raimbault, D. Rebière, C. Dejous, H. Tarbague, T. Cohen-Bouhacina, F. Moroté, N. Sakly, B. Ouada Haf., B. Ouada Hat., N. Jaffrezic-Renault & F. Lagarde
Arthrospira platensis, called spirulina (Sp), is known to bind a wide range of heavy metals. We propose an innovative approach, based on Spirulina as bioreceptor combined with highly sensitive Love wave platform for fast detection of heavy metals in solution. Our goal is to optimize the biofunctionalization of the sensor surface with microalgae, based on real-time responses of the acoustic sensor during Spirulina immobilization then heavy metals detection, combined with atomic force microscopy characterization to...

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