Reinhard Steindl
Continental Automotive Systems
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Publication
Featured researches published by Reinhard Steindl.
international microwave symposium | 1999
Reinhard Steindl; Alfred Pohl; Franz Seifert
SAW ID-tags can be employed as passive transponders for conventional sensors of capacitive, inductive and resistive type. An interdigital transducer (IDT) is used as a loadable reflector, other fixed reflectors are used as reference bits. The load of the programmable reflector influences both the phase and amplitude of the reflected wave. The principle is discussed, applications for the measurement of light, pressure and temperature are presented.
internaltional ultrasonics symposium | 1998
Reinhard Steindl; Alfred Pohl; Leonhard M. Reindl; F. Seifert
Programmable reflectors of SAW ID-tags can be employed as passive transponders for conventional sensors of the capacitive, inductive and resistive type. The programmable reflector is a loadable split finger transducer, other fixed reflectors are used as reference bits. A noncoherent read out signal processing is sufficient, because the load of the programmable reflector influences both the phase and amplitude of the reflected wave. The principle is discussed, setup and results of some actual measurements are presented.
IEEE Transactions on Instrumentation and Measurement | 2000
Hans Hauser; Reinhard Steindl; Christian Hausleitner; Alfred Pohl; Johann Nicolics
A micro-magnetic field sensor is developed using the giant magneto-impedance (GMI) effect in a 30 /spl mu/m diameter amorphous FeCoSiBNd wire of zero magnetostriction. Surface Acoustic Wave (SAW) devices are described as passive, radio requestable sensor devices. A new type employs the electrical load of the SAW device by the impedance of conventional sensors. In order to develop a wirelessly interrogable magnetic field sensor, the combination of GMI sensors and SAW transponders is discussed by several measurements. The device shows a relative signal sensitivity of 80 dB/T at low magnetic flux density B<30 mT, quick response (/spl ges/40 MHz bandwidth), and a high-temperature stability.
IEEE Transactions on Microwave Theory and Techniques | 1999
Reinhard Steindl; Alfred Pohl; Franz Seifert
Surface-acoustic-wave interdigital tags can be employed as passive transponders for conventional sensors of capacitive, inductive, and resistive types. An interdigital transducer is used as a loadable reflector, while other fixed reflectors are used as reference bits. The load of the programmable reflector influences both the phase and amplitude of the reflected wave. The principle is discussed, and applications for the measurement of light, pressure, and temperature are presented in this paper.
IEEE Transactions on Microwave Theory and Techniques | 2001
Christian Hausleitner; Reinhard Steindl; Alfred Pohl; Hans Hauser; Alois M. J. Goiser; Franz Siefert
Surface acoustic wave devices for wireless identification (ID) systems, the so-called ID tags, can be turned into novel sensor elements (transponders) for impedance sensors by making use of magnetic-field variations caused by the wheel rotation and key-click functionality of a personal computer (PC) mouse. This kind of sensor does not need any power supply and may be interrogated wirelessly. Interdigital transducers are used as loadable reflectors, while another fixed reflector is used as reference to compensate cross sensitivity for temperature, mechanical stress, etc. The load of the reflectors influences amplitude and phase of the reflected wave. The loads impedance is changed utilizing the giant magneto-impedance (GMI) effect in a 30-/spl mu/m-diameter amorphous FeCoSiNd wire of zero magnetostriction. The measurand, represented by the PC-mouse key clicks and wheel rotation, influences a magnetic field, which varies the impedance of the GMI wire. Consequently, the load of the reflector influences the reflected acoustic wave and the response signal of the radio sensor. The operating principle of such a magnetic-field sensor is discussed, and the tuning for an application in a passive and cordless PC mouse is presented.
internaltional ultrasonics symposium | 1998
Alfred Pohl; Reinhard Steindl; Leonhard M. Reindl; F. Seifert
The radio request of passive wirelessly interrogable surface acoustic wave sensors is discussed. The parameters of the measurement process are divided to the contributions of the sensor, the radio channel and the radio request method. The measurement bandwidth and an example for an actual radio channel are discussed. For matching of the method to the measurement problem, the parameters of different radio request methods are estimated.
IEEE/AFCEA EUROCOMM 2000. Information Systems for Enhanced Public Safety and Security (Cat. No.00EX405) | 2000
Christian Hausleitner; Reinhard Steindl; Alfred Pohl; Martin Brandl; Franz Seifert
The radio request of passive wireless interrogable surface acoustic wave (SAW) sensors/transponders, is discussed and a radio interrogation system for passive SAW sensors is introduced. The concept is intended to provide an alternative to interrogators with expensive RF and signal processing effects. Consequently the presented system employs a new concept for the generation of the RF signals and for signal windowing. Considering the inherent limitations, the proposed system presents a simple low cost solution for a wide range of various applications. Additionally we have investigated a new, small size and light weight antenna design used in conjunction with the SAW devices to build the passive sensor/transponder. The antenna structure is based on the concept of folded spiral antennas. Details of this proposed multilayered planar antenna design are described and experimental results are discussed. Numerical simulation results compared with experiments are presented. The system shows satisfactory performance and applicability in a wide range of remote monitoring applications.
instrumentation and measurement technology conference | 1999
Alfred Pohl; Reinhard Steindl; Leonhard M. Reindl
In this paper we discuss surface acoustic wave sensors for the measurement of dynamic measurands. The sensor types and the principles of effecting by the measurand are described. For non-stationary measurands, terms like bandwidth, resolution and error limits are discussed, boundaries are given. A new method of SAW radio sensors is introduced, capable for high speed measurements. Dynamic parameters are estimated experimental results are given for these new SAW sensor devices.
IEEE Transactions on Instrumentation and Measurement | 1999
Alfred Pohl; Reinhard Steindl; Leonhard M. Reindl
Archive | 2002
Wolf-Eckhart Bulst; Alfred Pohl; Franz Seifert; Reinhard Steindl