Andreas Heinig

Design and properties of a sensor network embedded in thin fiber-reinforced composites

So far, embedded sensor networks in composites have mostly been used for structure health monitoring. In contrast to that, in the present work a new stand-alone embedded sensor network for load monitoring of a composite component is presented. Design considerations for the manufacturing of a demonstrator as well as measurement results for cyclic loading are discussed. The presented demonstrator comprises two textile manufactured carbon filament yarn strain sensors for measuring the average bending strain of a large area, embedded capacitive keys for manually controlling the load monitoring process, a sensor ASIC for the processing of the measured data as well as a transponder ASIC with an antenna for the wireless transmission of the measured strains to an external reading station.

Wireless long-term ECG integrated into clothing.

Abstract The integration of electronic devices into clothing to monitor biosignals is demonstrated with the integration of a 3-channel ECG device into a shirt. It is shown that several basic requirements concerning the electronic design must be fulfilled, exceeding the capabilities of conventional portable systems. The application of flexible connection and housing technologies is addressed in the present paper. Printed boards should be flexible enough to adapt to movements of the human body. Small size as well as water-resistant or even washable construction is required. Additional points concern replacing the disturbing loose cable connections with a more integrated solution. A long period of operation without recharging the battery, uploading the data or changing the electrodes has to be achieved. The system should feature an uninterrupted 7-day operation period known as 24/7-monitoring regime. Starting with its specification, the basic design of the prototype is presented. First investigations have shown the washability of the shirt together with the inserted electronics. Zusammenfassung Die Kleidungsintegration von Geräten zum Monitoring von Biosignalen wird anhand der Integration eines 3-Kanal-EKGs in ein Shirt dargestellt. Es zeigt sich, dass dabei grundlegende Anforderungen an die Gestaltung der Elektronik erfüllt werden müssen, die über die bisheriger portabler Systeme hinausgehen. Hier sind insbesondere die Nutzung einer flexiblen Aufbau- und Verbindungstechnik, welche sich an die Körperform anschmiegt und der Körperbewegung folgt, die geringe Bauhöhe und die feuchtigkeitsgeschützte bzw. sogar waschbare Ausführung gefordert. Ein weiterer Punkt bezieht sich auf den Verzicht auf störende Kabelverbindungen am Körper. Außerdem muss eine lange Betriebsdauer ohne Nachladung der Akkus, Übertragung aller gemessenen Daten oder Wechsel der Elektroden erreicht werden. Ein ununterbrochener 7-Tage-Betrieb, bekannt unter dem Schlagwort 24/7-Monitoring, wird angestrebt. Ausgehend von der Spezifikation wird die grundsätzliche Gestaltung der Prototypen dargestellt. Erste Untersuchungen haben die Waschbarkeit des Shirts zusammen mit der eingeknüpften Elektronik gezeigt.

Multisensor signal processing with CAN bus interface

Abstract In this paper a flexible on-chip multisensor signal processing ASIC is proposed supporting a straightforward and economic configuration of smart microsystems. This ASIC admits the processing of sensor data and the data transfer via a field bus. The design on system level and the use of in-house hardware description language (HDL) cores and macrocells guarantees a wide range of applications.

Second generation OLED devices and systems: inline evaporation, highly efficient OLED devices, and novel driver/controller ASICs

Organic light-emitting diodes (OLED) have to be improved to achieve new market segments in displays and lighting applications. We present important steps towards achieving this goal in a combination of highly efficient devices, manufacturing and new driving aspects. It is generally expected that the manufacturing methods have to be made more efficient to achieve large market penetration. We firstly present results on a highly efficient RGB-OLED-system with doped transport layer, manufactured in the worldwide first vertical In-Line set-up. Additionally a second-generation passive matrix OLED controller/driver IC was developed. Though the design was application-specifically directed for the onto integration into an OLED minidisplay panel module (e.g., by pad layout design being closely related to display connection schemes), versatile service in various applications was focused on. Therefore, in general they may also act as application-specific standard products (ASSP), if their built-in functions provide compatibility to a wide range of passive-matrix OLED panels. Additionally, the second generation supports various PMOLED display resolutions, area or full-color (RGB) operating modes and circuit techniques for OLED devices lifetime improvement.

Integrated Sensor Network with Event-Driven Activation for Recording Impact Events in Textile-Reinforced Composites

This paper presents the system concept and first experimental results of the realization of a sensor network for monitoring suddenly occurring temporary events such as impacts. The system consists of modules with sensor and transponder ASIC that can be integrated into a composite component made of glass fibers and polypropylene. The power consumption in standby is very low because the power supply for the ASICs is only activated when a relevant event is detected by a startup sensor. A fast start of the data acquisition process at the beginning of the event is therefore extremely important. The achievable startup time is demonstrated with a test setup.

Optical wireless data transmission with a sensor network integrated in a textile-reinforced composite

In this work a wireless sensor network has been integrated in a textile-reinforced composite. It has been shown that an optical IrDA data transmission between an IrDA transceiver which is part of the sensor network and an external IrDA receiver is possible over a distance of a few ten centimetres. A special IrDA controller was developed to reduce power consumption and the number of components. All sensor data stored in the integrated memory can be transmitted with a high data rate using the optical interface. The power consumption is very low compared with radio systems.

Anti Stress App

Hagen Malberg, Liudmilla Ziaziulchyk, Max Braer, Martin Hoffmann, Aline Mittag, Robert Huhle, Sebastian Zaunseder, Institute of Biomedical Engineering, Technical University Dresden, Germany, Hendrik Bonnemeier, Medical Clinic III of Cardiology and Pulmology, University Schleswig-Holstein, Campus Kiel, Germany Andreas Heinig, Wolf-Joachim Fischer, Fraunhofer Institute for Photonic Microsystems, Dresden, Germany hagen.malberg@tu-dresden.de

P-39: Design of Versatile Passive-Matrix OLED Driver/Controller ASIC's

Passive-Matrix OLED driver/controller units have been developed. The second generation devices employ several new features allowing versatile applications. Those features include implementation of externally adaptable firmware affecting several functional properties, e.g., control of monochrome, area-color or full-color displays, features for OLED life-time improvement, and an automotive-compatible high-speed serial interface (LVDS).