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26 - 28 February 2019 // Nuremberg, Germany

Conferences and supporting programme

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Session 08 - Connectivity I / LPWA & NB-IoT

Real-Time Position Tracking and Finish Detection with LoRa Vortragssprache Englisch

For outdoor sport events like sailing regattas, it is often necessary to track the position of participants or equipment within a defined area in real time. Global navigation satellite systems (GNSS) can determine the position with great accuracy. In addition, using the LoRa radio technology, data can be transmitted over a distance up to 40 km under optimal conditions. A new developed position tracking system measures the position of up to 255 independent objects in a large-scale area. The system consists of multiple position trackers and a central base station. The position trackers determine their position using GNSS and send it through a LoRa transmitter. The data is immediatly available for visualization and evaluation. The system communicates bidirectional. A base station uses the same transmitter as the trackers. This makes it possible to configure and control the trackers from the base station at any time. The system can automatically perform position-based evaluations such as crossing the finish line. In addition, two trackers can be defined as start and end of the target line. The trackers wait for a GNSS signal before sending the first time. As soon as a GNSS signal is found, the trackers switch to sleep mode and wake up periodical for a position measurement. The time interval can be configured. In a typical configuration for sailing regattas they wake up every 3 seconds for a position measurement. When three data sets have been collected, a data packet is built and sent to the base station. The data package consists of object number, position data and time stamps. This has to be done because only a certain amount of data per hour can be sent through the LoRa band. The system implements a standard LoRa functionality and uses the 868 MHz band. The position trackers are built with latest very low power components and are optimized for low power consumption. This means that they are ready to be powered by energy harvesting.

--- Date: 27.02.2018 Time: 12:00 PM - 12:30 PM Location: Conference Counter NCC Ost



Benjamin Brossi

Züricher Hochschule für Angewandte Wissenschaften (ZHAW)


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