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Thanks to the proliferation of radio frequency identification systems (RFID), applications have emerged concerning positioning techniques for inexpensive passive RFID tags. The most accurate approaches for tracking the tag's position, deliver precision in the order of 20 cm over a range of a few meters and require moving parts in a predefined pattern (mechanical antenna steering), which limits their application. Herein, we introduce an RFID tag positioning system that utilizes an active electronically-steered array, based on the principles of modern radar systems. We thoroughly examine and present the main attributes of the system with the aid of an finite element method simulation model and investigate the system performance with far-field tests. The demonstrated positioning precision of 1.5°, which translates to under 1 cm laterally for a range of a few meters can be helpful in applications like mobile robot localization and the automated handling of packaged goods.

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This paper reviews how RFID-assisted geometry recognition can compete conventional methods for automated package handling. It demonstrates how RFID tags used for product identification can be implemented into automated handling processes to improve warehousing efficiency. Therefore, tag positioning for the HF band is investigated based on two distinct localization principles and different RFID systems. RFID-assisted package localization and positioning is discussed based on the results and the impact it could have on warehouse automation and other industrial applications.Zusammenfassung Mit der raschen Verbreitung der RFIDTechnik in der Logistik sind innovative Konzepte zu weiteren Nutzungsmöglichkeiten von Transpondern in automatisierten Prozessen entstanden. In diesem Beitrag werden Methoden zur Lokalisierung von RFID-Transpondern mit dem Ziel der automatischen Handhabung von Produkten im Materialfluss gezeigt. Zwei Methoden, die auf verschiedenen RFID-Systemen und Lokalisierungsprinzipien basieren, wurden ausgewählt und untersucht. Die Ergebnisse und Auswirkungen auf das Lagerwesen und mögliche industrielle Anwendungen werden diskutiert.