424 Works

P3.3 - Direct sensing of coke deposits on fixed bed catalysts in refinery processes

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The activity of heterogeneous catalysts in refinery processes is substantially influenced by formation of coke deposits. This study expands an in-situ method for direct determination of the coke loading in fixed bed catalysts by utilizing suspension balance techniques. Here, it is investigated whether it is possible to measure the coke content during coking and regeneration. Applied to a technical relevant Al2O3-based Cr2O3-catalyst, it is shown that the electrical impedance of a catalyst pellet is strongly...

P3.9 - Measuring System and Method Eliminating Drifts and Parasitic Influences for Cantilever Based Bio-Sensors

Gencho Minchev, Tatiana Mincheva & Vlado Stavrov
The most natural and universal approach for identification of nano-sized biological objects (macromolecules, molecular complexes, viruses, bacterial spores, etc.) is to immobilize them with respective antibodies on cantilever surface and then to measure the sensor mass change. Difficulties arise due to the ultra small magnitude of these changes. An added to the cantilever mass could be registered as a change in deflection or a shift in resonance frequency. Using only one cantilever as an ultrasensitive...

P3.8 - Fabrication of Fluorecent Ammonia Sensor Using Polymer Nano- and Microparticles

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The opportunity to control of ammonia is important in different application areas such as environmental gas analysis, automotive and chemical industry, medical diagnostics, etc. Some monitoring systems require very low detection limits (for example, 50 ppb for diagnostic breath analysis). Ink-jet printing is known to be one of the most promising methods for controlled deposition of functional materials. For example, arrays of the colloidal photonic crystals may be directly fabricated using an ink-jet printing. Development...

P5.1 - Zeolite-based selective potentiometric hydrogen sensor

Gunter Hagen & Ralf Moos
Planar potentiometric gas sensors consisting of thin-film interdigital electrodes (IDE) and an ionconducting zeolite thick-film cover layer are manufactured. One electrode comprises a thin film metaloxide layer on top, which is in contact to the zeolite. Electromotive forces between the electrodes depend on temperature, gas concentrations and the sensor configuration (type of metal oxide layer / type of ions in the Pt-doped zeolite). Results of a Pt-Na-ZSM-5 on Au/AuPt electrodes measured at 400 °C are...

P1.3 - Measuring System for Non-Contact Oscillation Measurement

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This paper summarizes the investigations and results of an R&D project concerning a measuring system for a non-contact amplitude and direction measurement of periodic and aperiodic lateral device oscillations. It is based on the detection and analysis of scattered light speckle patterns caused by rough surfaces and can be manufactured at low costs, qualifying it for the integration into production processes and assembly lines.

P1.6 - Development of Bending-Type Ultrasonic Transducers with Rotational Symmetry

Michael Rabl, Mario Jungwirth & Peter Zeller
Ultrasonic sensors are commonly used for a wide variety of non-contact presence, proximity or distance measuring applications in industry, especially the automotive branch. This paper shows how the radiation properties of bending-type ultrasonic transducers with rotational symmetry depend on shape, dimensions and especially on material parameters. In order to determine their dependencies, the behaviour of such transducers with regard to their emitting characteristics in air was simulated using a finite element (FE) method for computing...

P3.1 - Capacitive field-effect pH sensor based on an electrolyte-ferroelectric-insulatorsemiconductor structure

Vahe Buniatyan, Norayr Martirosyan, Maryam Abouzar, , Willi Zander, Michael J. Schoening, Arshak Poghossian & Spartak Gevorgian
Current interest in perovskite and perovskite-related ferroelectric materials is based on their wide range of electrical properties ranging from insulating materials, ionic and/or electronic conductors up to p- and ntype semiconductors and superconductors. Perovskite oxides of the system A1-xAx’BO3-b (A=Pb, Ba, La, Li; A’= Sr, Ca; B = Ti, Ta, Co, Fe, etc.) are used in high density dynamic random access memories (DRAM), non-volatile ferroelectric random access memories (FeRAM), ferroelectric field-effect transistors, voltage-tuneable capacitors (varactors),...

A3.4 - A Novel Torsion Sensor

Erhard Kisker
Torque and twisting angle sensors are broadly used in industry, The mostly used technique is based or strain gauges that measure the elastic deformation of a shaft to which they are attached at the outside. Due to the elastic limits of the strain gauge element the torsion angle is restricted to very small values. A different type of torque sensors is based on bye stress-induced anisotropy of a magnetic shaft or a magnetic layer plated...

A4.3 - Compact Coriolis Mass Flow Meter/Controller for Low Flows

Marcel Katerberg
The accurate and fast measurement of small mass flow rates down to 1 g/h of fluids is considered an “enabling technology” in various industries. Applications for instruments capable of measuring these low flow rates can be found in e.g. semiconductor, fine-chemical, pilot plants, food & pharmaceutical industries and liquid dosing systems for micro reactors. Mass flow meters based on the Coriolis effect offer the most direct sensing of the mass flow rate, and for this...

B1.2 - HYPER-IMS: A Fully Implantable Blood Pressure Sensor for Hypertensive Patients

, Thorsten Goettsche, Peter Osypka, , , Holger Fassbender, Wilfried Mokwa, , , , , , , & Raymond Glocker
Hypertension and heart failures were and are increasingly two of the main diseases of modern population. As a powerful tool for long-term post surgical evaluation of heart pressure, body temperature and pulse rate, a telemetric controlled sensor-implant without battery is currently developed and evaluated in the course of preclinical in-vivo experiments.

B1.3 - Excitation and Wireless Lock-In Measurement of Hip Prosthesis Vibrations for Loosening Detection

Uwe Marschner, Birger Jettkant, Dietmar Ruwisch, Hagen Graetz, Gregor Woldt, &
An experimental setup for excitation and detection of hip prosthesis loosing is developed and analyzed. Small vibration signals are detected by acceleration sensors fixed in the prosthesis. Lock-in technique is applied to separate sensor signals at low signal-to-noise ratio. Stand-alone measurements were taken at an artificial thigh where an electrodynamic audio shaker was fixed at the knee using an appropriate designed support structure. It could be demonstrated that the measurement setup is suitable to excite...

A6.2 - An integrated Nine-dimensional Hall-Gradient-Sensor

Michael Hackner, & Markus Stahl-Offergeld
Magnetic sensors for position detection are used in many products and apparatuses. In most cases the sensor, which is used to solve the problem, can only detect one single mechanical dimension (1D) of the magnetic field or flux-denisity. But generally, mechanical movements consist of 3 degrees of translatory and 3 degrees of rotary freedom. Temperature and external fields are further quantities, which may influence the measurements. So, at least 8 independent measures have to be...

A6.4 - Magnetic Micro Sensor Activities at the Leibniz Universität Hannover

& Christine Ruffert
The Institute for Microtechnology (imt) at the Leibniz Universität Hannover`s Center for Production Technology (PZH) in Garbsen, Germany, is one of the world`s leading institutions with a focus on the design and fabrication of magnetic micro sensors and actuators. Although there is a growing demand for the development of magnetic micro actuators for hard disk drive applications, micro positioning or fluidic control, the area of micro sensors is still dominating the market. One focus in...

S2.4 - Der Ausbildungsverbund Mikrotechnologie Berlin-Brandenburg

Stefanie Eckle & Nicolas Hübener
Mikroelektronik und Mikrosystemtechnik gehören zu den wichtigsten Schlüsseltechnologien des 21. Jahrhunderts. Nicht nur der PC oder das Handy, auch ABS und Airbagsysteme wären ohne Mikrosystemtechnik unmöglich – in fast allen Bereichen erhalten mikrosystemtechnische Produkte Einzug in unseren Alltag. Bereits heute sind in Deutschland rund 100.000 Menschen in der Entwicklung und Produktion dieser sogenannten Mikrotechnologien beschäftigt – mit zunehmender Tendenz. Für die Herstellung mikrotechnischer Bauteile und Komponenten kommen technisch anspruchsvolle und hochkomplexe Fertigungsverfahren zur Anwendung, die...

A6.1 - Magnetic Microsensors: Quo Vadis?

Jan Marien & Andreas Schuetze
Magnetic sensors are used for contactless and wearless detection of a wide range of magnetic fields. This includes extremely low fields of a few fT (10-15 T) generated by the activity of human brain cells up to hundreds of mT (0.1 T) of modern rare earth magnets. During the last 20 years magnetic sensors have become very popular for detecting different physical properties like electric current, mechanical position, speed, angle, rotational speed or the earth...

C2.3 - MEMS Capacitive Sensor Interfaces: Can we Solve the Challenge?

Robert Puers
It is well known that integrated capacitive mechanical sensors offer much higher potentials than their piezo-resistive counterparts as far as sensitivity, temperature behaviour, stability and power consumption are concerned [1]. However, their adoption in regular applications is still moderate, despite these excellent characteristics. One reason is clear : inherently, it is not wise to miniaturize such sensors. The concept is in fact not very compatible with the basics of MEMS, i.e. : the parasitics become...

D2.4 - Miniaturized Platinum Temperature Sensors with High Resistance for Smart Systems

Olaf Kiesewetter
The development and realization of smart system for applications in aerospace industry, automotive industry, security engineering, logistics, medical engineering a.o. put new and extended requirements to sensors and sensor systems. The optimized adaptation of the sensor system to the measurement objective, especially with regard to miniaturization and integration in overall system concepts, reduction of power consumption, improvement of measurement accuracy, reduction of response times, extension of the temperature range, long term stability and reliability are...

S1.2 - Hochschulszene Sensorik und Mikrosystemtechnik: Wer macht was wie?

Andreas Schütze
Die Hochschullandschaft in Deutschland ist vielfältig und entwickelt sich, insbesondere durch die umfangreichen Novellierungen und Reformen der letzten Jahre, stürmisch weiter. Neben dem viel diskutierten Bologna-Prozess, verbunden mit der Umstellung der Abschlüsse an Hochschulen auf das angelsächsische System der gestuften Bachelor-/Master-Abschlüsse, der in einem gesonderten Beitrag behandelt wird [1], entwickelt sich die Hochschullandschaft auch durch Schaffung neuer Studienangebote laufend weiter. Der Beitrag soll einerseits einen Überblick geben über Studiengänge, die spezifisch die Mikrosystemtechnik und damit...

S1.3 - Bolognaprozess und Bachelor-/Masterabschlüsse: Worauf müssen sich Unternehmen einstellen?

Gerald Gerlach & Michael Schanz
1999 wurde die "Bologna-Erklärung" von einem Großteil der europäischen Bildungsminister mit dem Ziel unterzeichnet, einen international wettbewerbsfähigen, europäischen Hochschulraumes bis zum Jahre 2010 zu schaffen. Mit der generellen Einführung eines zweigliedrig gestuften Studiensystems sollten entsprechend gestufte Abschlüsse verständlicher und besser vergleichbar und so die Mobilität von Studierenden und Arbeitnehmern unterstützt werden. Die Berechnung des Studieraufwandes von Lehrveranstaltungen auf der Basis von sogenannten ECTS-Punkten, die Beschreibung von Studienzielen und Lehrinhalten in "Diploma Supplements" und Modulbeschreibungen sollten...

S2.1 - Gewerbliche Hochtechnologieausbildung für die Sensorik-Branche: Berufe und Bedarfe

Sabine Globisch
Diskussionen um den drohenden oder bereits spürbaren Fachkräftemangel begleiten die technologische Entwicklung in den Schlüsseltechnologien Biotechnologie, Mikrotechnologie, Nanotechnologie und optische Technologie in Deutschland bereits seit über einem Jahrzehnt. Dabei beziehen die Diskussion die gewerbliche und die akademische Ebene in gleicher Weise ein, denn es wird ein Mangel an ausgebildeten Ingenieuren genauso beklagt wie die fehlende Zahl an gewerblichen Fachkräften.

A8.3 - A Novel Magneto–Elastic Force Sensor Design Based On Terfenol–D

Klaus Oppermann & Bernhard G. Zagar
In this paper the magneto–elastic–effect is taken under further investigation, to determine the utility of the novel material Terfenol–D in force sensor applications. By the reason that Terfenol–D has one of the largest magnetostrictive constant known we anticipated to get a higher sensitivity of the force sensor as compared to other materials e. g. steel. A simple and robust single coil sensor set-up is introduced. The dependency on the characteristic parameter of this set-up the...

B7.4 - YSZ Thick Film Oxygen Gas Sensor Using the Direct Ionic Thermoelectric Effect

Ulla Roeder-Roith, Frank Rettig, Kathy Sahner, Ralf Moos, Timo Roeder &
The introduced thick-film sensor determines the oxygen partial pressure by measuring the thermopower over an oxygen ion conductor. The measurand is a voltage, which means that the sensor signal is independent on geometry. That is advantageous for long-term stability because the influence of aging effects like cracks or sintering is low. Another advantage of this method compared to the measuring of a Nernst voltage (e.g. in a λ-probe) is that no reference atmosphere is needed....

B8.4 - Optical 3D Measurement of Micro Structures

Andreas Ettemeyer, Michael Marxer & Claus Keferstein
Proving the performance of high precision micro components requires special knowledge and techniques in their design and manufacture. With dimensions ranging from less than 0.1 mm to several mm, such components are often delicate and fragile and require non contact measurement techniques. This calls for the use of optical inspection techniques. Optics offers many advantages such as very fast, non contact inspection, no influence on the measured object, 3D measurement capability, full field inspection and...

I2.3 - IR Dual-Band Camera Demonstrator and Dual-Band Image Fusion Techniques

Uwe Adomeit
During the last decades, thermal imagers have evolvolved from "simple" scanning systems to state-of-the-art focal plane arrays (FPA). Nowadays, different trends of development can be seen, for example decrease in pixel size, new materials (InAs/GaSb superlattices) and especially multispectral imagers. A multispectral imager is able to acquire information in different channels of the electromagnetic spectrum at the same time, while the standard broadband systems only work in one channel of the electromagnetic spectrum. One type...

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...

Registration Year

  • 2011

Resource Types

  • Text