2,732 Works

2.2.4 Hybridintegration von Mikrodehnungssensoren

T. Frank, A. Grün, M. Kermann, A. Cyriax, A. Steinke, T. Ortlepp & G. Reschke
Silizium-Dehnungsmesssensoren oder Siliziumdehnmessstreifen (Si-DMS) substituieren in einige Anwenundgen, insbesondere im Bereich Druckmesstechnik, die piezoresistiven Dünnschicht- und die Dickschichtwiderstände. Der höhere Koppelfaktor und die deutlich höhere Langzeitstabilität machen diese Sensoren zunehmend interessant für weitere Anwendungen. Besonders hohe Anforderungen an die Montage bereitet die zunehmende geometrische Größe der Prüfkörper. Die Prozesse, wie sie für kleine Prüfkörper üblich sind, z.B. Glasfritt- und Drahtbonden, stoßen schnell an ihre Grenzen. Thermische Prozesse sind aufgrund der Masse des Prüfkörpers unwirtschaftlich oder...

O2.2 - Optimizing Performance of a Fiber Optic Sensor Interrogator by Time of Flight Measurement

M. P. Plattner, F. Hirth, M. S. Mueller, L. Hoffmann, T. C. Buck & A. W. Koch
For the purpose of structure and temperature monitoring of Ariane launchers, a new fiber optic sensor interrogation system is developed by our institute. It is based on a monolithic, modulated-grating laser diode that is capable of switching between any two output wavelengths within less than ten nanoseconds. This makes the system very versatile since different sensors within the connected measurement channels can be read out in arbitrary sequence. Therefore sampling rates of single sensors can...

4.3.2 Vergleich subjektiver und automatisierter Merkmalsextraktion sowie Einsatz maschineller Lernalgorithmen zur mikromagnetischen Materialcharakterisierung

S. Youssef, C. Zimmer, K. Szielasko, Z. K. Suri & A. Schütze
Im Rahmen dieses Beitrags wurde untersucht, mit welchen Möglichkeiten die datenbasierte Vorhersagequalität verbessert werden kann. Neben der Optimierung des Merkmalsraums wurde die multiple lineare Regression (ML-R) mit weiteren Regressionsalgorithmen (Support Vector Regression, Multilayer Perceptron Regression) verglichen. Diese Regressoren bieten aufgrund ihrer Mächtigkeit und Flexibilität, Nichtlinearitäten in den Daten abzubilden, enormes Potenzial zur Erstellung komplexer Modelle. Beide besitzen jedoch „Stellschrauben“ (sog. Hyperparameter) die signifikant zur Vorhersagequalität beitragen und aufgrund der Vielzahl möglicher Kombinationen kann das Finden...

P2AR.2 - A Smart Chemosensor: Discriminated Multidetection and Execution of Various logic Gates in Aqueous Solution at Biological pH

A. I. Said, N. I. Georgie & V. B. Bojinov
A novel rhodamine and pyrazole based probe was designed and easily synthesized. The probe could to detect several analyts in aqueous solution at biological pH (HEPES, 7.2). the probe could to detect discrimintly Several catoions, including Cu2+, Fe3+, Al3, Hg2+ and Ni2+. The detection could be selective towards Cu2+ by using high concentration of HEPES (10-3 mole L-1) in aquous solution and could be selective towards Hg2+ (by absorption spectrum) by working in pure organic...

2.2.5 Microarrayed 2D-SPR Immunosensor for Interleukin-2

Masayasu Suzuki, Yoshinori Kawauchi & Yasunori Iribe
This paper reports high sensitive detection of mouse interleukin-2 (IL-2) in 0.010 mm i.d. wells, single cell based microwell array, by using a high resolution two dimensional surface plasmon resonance (2D-SPR) sensor and enzyme catalyzed biochemical amplification of SPR signal. In order to detect cytokines from a single cell, sensitivity of < ng/ml should be required even if we consider the small volume of microwells (~1pl). In this study, alkaline phosphatase (ALP) catalyzed precipitation reaction...

B8.2 - System for 3D Localization and Synchronization of Embedded Wireless Sensor Nodes Based on AMR Sensors in Industrial Environments

St. Carrella, K. Iswandy & A. König
In ambient intelligence, medical, and industrial applications, wireless sensor nodes are used for measuring variables of the environment or the process. In some applications, knowledge of the sensor localization is mandatory. While the RSSI from the radio module is widely used for the localization, there are some applications and environments, e.g. liquid filled containers, which hinder the establishment of a reliable radio link and the localization, accordingly. Even though there are alternative technologies, which are...

A8.2 - Temperature Estimation of Induction Machines Based on Wireless Sensor Networks

Y. Huang & C. Gühmannn
The 4th-order Kalman filter (KF) algorithm is implemented in the wireless sensor node to estimate the temperatures of the stator winding, the rotor cage and the stator core in the induction machine. Three separate wireless sensor nodes are used to acquire and preprocess the input signals. The hall sensors are used to acquire the three-phase stator currents and voltages of the induction machine. All of them are processed to Root-Mean-Square (RMS) in ampere and volt....

P2.0.13 Semiconductor gas sensing coupled with pre-sampling system for public security

Valeriy V. Krivetzskiy, Maxim A. Panteleev, Leonid A. Logvin, Andrey V. Smirnov, Marina N. Rumyantseva, Alexander M. Gaskov, Sergey Yu. Semenov & Valentin N. SMirnov
An innovative approach of sensitive and selective detection of trace amounts of chemical threat agents is presented in this work. The technology deals with semiconductor metal oxide gas sensors as a means of express gas detection, coupled with pre-sampling system, which is to improve sensitivity and selectivity of analysis. Examples for H2S, DMMP (phosphor-organic weapons simulant) and UDMH (highly toxic rocket engine fuel constituent) sensor detection with aided by pre-sampling system are given. The issues...

D1.4 - Photovoltaic Cells with Increased Voltage Output for Optical Power Supply of Sensor Electronics

H. Helmers, L. Wagner, C. E. Garza, S. K. Reichmuth, E. Oliva, S. Philipps, D. Lackner & A. Bett
An elegant solution for the power supply of sensor electronics is the application of power-by-light technology. With this technology several challenges related to conventional copper wiring are inherently overcome; benefits are galvanic isolation, the suppression of electromagnetic interference, and the possibility to combine power and bidirectional data transmission in a single fiber link. In order to power sensor electronics efficiently, a supply voltage in the range 3 to 12 V is typically required. This paper...

P1.8 - Model-based noise estimation for fringe projection systems

M. Fischer, M. Petz & R. Tutsch
For full-field optical 3D measurement systems, camera noise is the dominant uncertainty factor when optically cooperative surfaces are measured in a stable and controlled environment. In industrial applications repeated measurements are seldom executed for this kind of measurement systems. This leads to statistically suboptimal results in subsequent evaluation steps as the important information about the quality of individual measurement points is lost. In this work it will be shown that this information can be recovered...

D2.1 - Printed embedded transducers: Fabrication, design and characterization of selected applications

J. K. Sell, W. Hilber, M. Schatzl-Linder, B. Strauß, H. Enser & B. Jakoby
This contribution gives an overview on our recent work on printed embedded transducers. It is focused on the description of appropriate technologies as well as technological considerations for the integration of sensors and actuators into the coating of sheet metal. In particular, the integration of capacitive large area sensors, piezo- and pyroelectric layers and strain gauges is discussed. The devised concept has the potential to introduce additional functionality (e.g., in terms of sensors) to a...

10.1 - Magnetoelastic Sensors - Status, Commercial Readiness, and Outlook

J. Müller
Torque / load sensors will play an increasingly important role in many applications, provided that functional requirements and cost targets for serial production are met. They enable critical benefits such as efficiency improvements, weight savings, operational safety, enhanced productivity, and cost savings. Magneto-elastic sensors, being truly non-contact based, have inherent advantages over traditional solutions based on strain gauges regarding robustness and cost structures. Recently, they have emerged as a viable, commercially proven alternative in a...

2.1.1 Genauigkeit moderner Kraftmessdosen- Stand der Technik und Anwendungen

T. Kleckers
Moderne Kraftsensoren wie die S9M von HBM erreichen höchste Genauigkeiten. Linearitätsfehler, relative Umkehrspanne und Temperatureinflüsse sind kleiner als 0,02% relativ zum Endwert. Diese Eigenschaften eröffnen neue Anwendungen, bei denen die Genauigkeit weniger im Mittelpunkt steht, als vielmehr die Wirtschaftlichkeit und die Zuverlässigkeit einer Kraftmessung.

P1.1 - Manufacture of electrodes entirely made of modified PDMS

R. Ruff, A. Brensing & K.-P. Hoffmann
Materials with different mechanical characteristics are used for common flexible electrodes. These differences limit their long term usability as interface to biological tissue. In this paper a manufacturing process for structural compatible PDMS electrodes is described. Issues like the adhesion between the components, the Young's moduli of the materials as well as the contacting process were addressed. Direct cell contact tests provided the evidence of cell compatibility. By recording electromyograms (EMG) and the evaluation of...

1.2 - Line Sensor for Fast, Time-Resolved Spectroscopy Measurements

E. Poklonskaya, D. Durini, M. Jung, O. Schrey & W. Brockherde

D5.2 - Optimized Manufacturing of Industrial Hydrogel Sensors

M. Windisch, J. Lienig, K.-J. Eichhorn & R. Schulze
Fast industrial hydrogel sensors require thin polymer films with reproducible properties as sensing layer. The manufacturing process of such hydrogel coatings in the submicrometer range has been investigated with respect to a sufficient and reproducible sensitivity in order to create the necessary knowledge for a quality-assuring volume production. Interrelations between process parameters, the resulting hydrogel coating properties and the sensor behavior have been studied by means of batch manufacturing tests and direct measurements of film...

P2GS.27 - Self-Assembled MoO3 Nano Golf Balls: A Trimethylamine Gas Sensor

P. Srinivasan & J. B. Balaguru Rayappan
Development of trimethylamine (TMA) sensor is of potential interest, since TMA is one of the biomarkers of sea food quality / freshness assessment. In this context, self-assembled MoO3 golf ball like nanospheres based sensing element was fabricated using spray pyrolysis technique. Investigations were carried-out to understand the growth features by varying the substrate temperature in the interval of 50 K from 523 K to 623 K. An intermediate tetragonal phase molybdenum compound was formed at...

P2.4.12 Ethanol Sensing Properties of Pure and Au Modified ZnO nanowires

Niranjan S. Ramgir, Manmeet Kau, Niyanta Datta, Preetam K. Sharma, S. Kailasaganapathi, S. Bhattacharya, A. K. Debnath, D. K. Aswal & S. K. Gupta
Hydrothermal growth of zinc oxide (ZnO) nanowires has been carried out on Si/SiO2 substrates containing ZnOnanoparticles as seed. The nanowire films have been modified by depositing ultrathin layers of gold (Au) using RF sputtering technique. The sensor films were observed to detect ethanol with maximum sensitivity at an operating temperature of 325°C. Incorporation of Au not only enhances the sensitivity but also improves the reaction kinetics towards ethanol. The response and recovery times for Au...

1.6 - Spektroskopische Untersuchung protonenleitfähiger metallorganischer Gerüstverbindungen

D. Klawinski, T. Homburg, N. Stock, M. Tiemann & T. Wagner
Wir stellen erste Ergebnisse der Entwicklung eines Sensorelements zur in situ Überwachung der Feuchte und Protonenleitfähigkeit in neuartigen Protonenaustauschmembranen (PEM, proton exchange membrane) für Brennstoffzellen (FCs) vor. Unter Ausnutzung von Streufeldeffekten (fringing electric fields) sollen später die PEMs im Betrieb über Wechselstrommessungen charakterisiert werden. Die hier vorgestellten Experimente zielen auf die Charakterisierung von neuartigen protonenleitfähigen Materialien, den sogenannten metallorganischen Gerüstverbindungen, mit Hilfe von Impedanzspektroskopie und der Entwicklung geeigneter Ersatzschaltbilder und Modelle zur Auswertung der Messergebnisse....

P2.03 - Abscheidung von Langasit mittels Laserablation zur Herstellung hochtemperaturstabiler piezoelektrischer Sensorschichten

L. Zhao, R. Feder & H. Fritze
Effektive Energiewandlungsprozesse erfordern hohe Temperaturen und damit entsprechend stabile Sensoren. Ein wesentlicher Bestandteil miniaturisierter Hochtemperatur-Sensoren sind piezoelektrische Funktionsschichten. Aus diesem Grund wird die epitaktische Abscheidung von hochtemperaturstabilen, piezoelektrischen Langasitschichten systematisch untersucht. Im Gegensatz zu herkömmlichen Herstellungsverfahren wird Langasit mittels einer Kombination aus gepulster Laserablation und thermischer Behandlung während des Ablationsprozesses epitaktisch auf Langasit (Homoepitaxie) und anderen Substratmaterialien (Heteroepitaxie) abgeschieden. Dabei werden die Qualität der Funktionsschichten und die Temperaturabhängigkeit der elektromechanischen Eigenschaften des Systems aus Schicht...

C4.2 - NIVA_B – Non-Invasive Determination of Blood Glucose

H. Fischer, A. Völkel & M. Bussas
NIVA_B is a TROUT GmbH medical technology project on non-invasive determination of blood glucose. The NIVA_B objective is to provide an easy-to-use non-invasive blood glucose measurement system for continuous and pain-free detection of blood glucose values. The system is based on impedance spectroscopy and uses an artificial neural network to calculate the individual correlation between impedance values and blood glucose level. NIVA_B generates a glucose value every minute. A series of pre-clinical tests have shown...

P2GS.29 - Improvement of Gas Sensing Properties for SnO2/Zeolite Composites Prepared by Electrospinning

Y. Sun, J. Wang, X. Li, H. Du & C. Wang
In order to improve the selectivity of the SnO2 gas sensor, different proportions of stannous chloride and nano-ZSM-5 zeolite mixed solution were synthesized, and SnO2/ZSM-5 composites were synthesis by electrospinning. The structure and morphology of the compounds and gas sensing properties were tested. Comparing with the gas sensing properties of the electrospinning SnO2 fibers. The response values of these SnO2/ZSM-5 composites gas sensors to formaldehyde vapor were increased, but the responses to other volatile organic...

5.2.1 Früherkennung von Strukturschäden mittels geführter Lamb-Wellen

E. Köppe, M. Bartholmai & J. Prager
Eine Reihe von Prüfproblemen in der chemischen Industrie, in Kraftwerksanlagen und in Transportsystemen ist aufgrund schwieriger Zugangsmöglichkeiten nur begrenzt technisch bzw. wirtschaftlich effizient durchführbar. Das hier vorgestellte Projekt beinhaltet die Entwicklung eines Verfahrens der zerstörungsfreien Prüfung über weite Entfernungen (bis zu 100 m), das zum Einsatz in automatisierten Messsystemen bzw. zur Integration in Langzeitüberwachungssysteme geeignet ist. Grundlage des Verfahrens ist die gezielte Anregung und Auswertung von Lamb-Wellenmoden, wodurch eine effektive Unterscheidung von Fehler- und Formanzeigen...

C3.3 - Energy-Autarkic Sensors in Aircrafts

K. Bartholomé
Sensors are the eyes and ears in the service of people - especially in inaccessible areas where regular maintenance or battery replacement is extremely difficult. A solution can be the implementation of self-powered sensor networks that autonomously collect their required energy from their surroundings. After installation of the sensors they collect and transmit their data without any need for further maintenance like battery replacement. In aeronautics, maintenance of airplanes is one of the major cost...

1.2 - Echtzeitdetektion der Adsorption einzelner Nanopartikel auf funktionalisierten Oberflächen mittels hochauflösender SPR-Mikroskopie

V. Scherbahn, S. Nizamov, F. Klemm, K. Tonder & V. Mirsky
In dieser Arbeit präsentieren wir eine neue Methode für die ultra-sensitive und markierungsfreie Detektion und Visualisierung von einzelnen Nanopartikeln in Echtzeit. Die Anwendung basiert auf der SPRMikroskopie mit CCD-Kamera als Lichtdetektor. Durch eine spezielle optische Konfiguration wird eine ~ 1 mm2 große Sensoroberfläche abgebildet. Werden die erzeugten SPR-Bilder anschließend differenziert, können geringste Änderungen im Brechungsindex, die z.B. durch die Adsorption von Nanopartikeln an der Sensoroberfläche entstehen, abgebildet werden. Je nach Material und Größe der Nanopartikel...

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