Herbert F. Schweinzer

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The free market forces infrastructure operators to increase their operational efficiency. To achieve this, among other things personnel costs have to be reduced. This implicates the reduction of the number of train station inspectors. Since they were also responsible for checking the passing trains for fault states, the higher distances of unobserved(More)
There are many situations in which it is desirable to use a Local Positioning System (LPS), which constitutes a complete and independent unit, offers high accuracy and in addition is economical to realize. This paper describes the LPS LOSNUS (Localization of Sensor Nodes by Ultra Sound). LOSNUS is a complete and independent LPS where the same system can be(More)
In the past years a lot of research has been conducted in the field of ultrasonic location systems. Usually systems use time of flight measurement of the ultrasonic signal to determine the distance between transmitters and receivers. Mostly indoor location systems are used for tracking of mobile units. However, device location is getting growing importance(More)
In practical applications, the accuracy of a LPS is often affected by non-line-of-sight (NLOS) errors which disable proper locating results. In this article, a robust localization algorithm capable of minimizing the effects of NLOS errors during position estimation is presented. The robust localization algorithm uses hyperbolic multilateration in(More)
In the last years, a few Ultrasonic (US) positioning systems were presented which are primarily directed at indoor tracking of mobile devices. The US positioning system LOSNUS presented in this paper widens the application additionally supporting locating of static devices which can be numerously deployed communicating via a wired or wireless sensor(More)