Natural Science and Technical Academy Isny

Different kinds of light detectors and their working principles are explained covering the following detector types: thermal detectors, photoelectric detectors, semiconductor detectors, space-resolving detectors. This is followed by the discussion of some general principles of electronic metrology, which must be considered when applying these detectors. Finally, we compare and summarize the properties of the discussed detectors.

Laser Doppler methods are used to measure the state of motion of objects and particles. Laser vibrometers and laser anemometers make use of this effect. Their interferometric principle is explained which allows to determine velocities and to discriminate as well the direction of movement. Signal processing schemes are described such as frequency demodulation, digital signal processing, tracker and photon correlators. Examples of applications as the measurement of the three dimensional vibration state of car bodies and flow fields in wind tunnels are presented.

This paper describes the development of an intrusion detection system for container security applications. In particular it addresses the development and implementation of intrusion detection algorithms. Container security became an important issue due to the recent attacks and incidents in the world. However up to now no cost-effective ultra low power solution has been available for integrated logistics. In order to support the global logistics chain we have developed a wireless sensor system for container monitoring. The intrusion detection system (IntruTag) consists of a microcontroller based sensor and communication module. An intrusion can be observed by using a 3-axis acceleration sensor and dedicated detection algorithms. They allow distinguishing between robust handling and unwanted openings of the container. The result of the event classification is transmitted to a base station for further actions.

Die Akademie für Osteopathie e.V. stellt eine Serie von Beiträgen zum Thema „wissenschaftliches Arbeiten“ vor. Im ersten Beitrag wurde dargestellt, wie man (in der medizinischen Datenbank Medline) wissenschaftliche Publikationen findet. Dieser Beitrag befasst sich mit den Zusammenfassungen (Abstracts) von Studien.