Performance Evaluation of a UWB Positioning System Applied to Static and Mobile Use Cases in Industrial Scenarios

Schjørring, Allan; Crețu-Sîrcu, Amalia Lelia; Rodríguez, Inés González; Cederholm, Peter; Berardinelli, Gilberto; Mogensen, Preben

doi:10.3390/electronics11203294

Cited by 12 publications

(9 citation statements)

References 32 publications

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“…In comparison to our previous study, reported in [15], where the UWB deployment in the same industrial operational scenario considered only 8 infrastructure anchors (half than in this study), the UWB positioning performance have now improved. While the median accuracy performance is similar, the maximum ranging error is reduced by a factor of 2.…”

Section: ) Performance In Static Conditionscontrasting

confidence: 40%

“…Among the numerous indoor RTLS technologies that rely on radio frequency (RF) signal exchange, such as Wi-Fi, Bluetooth, Infrared, and RFID; UWB stands out due to its exceptional combination of accuracy, reliability, scalability, realtime tracking capabilities, and low power consumption [13], [14]. These attributes have made of UWB a preferred choice for an efficient location tracking solution in industrial settings, achieving an operational accuracy in the range of 20 cm to over 100 cm, depending on the factory conditions [15].…”

Section: Related Workmentioning

confidence: 99%

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Experimental Evaluation and Modeling of the Accuracy of Real-Time Locating Systems for Industrial Use

Valiollahi,

Rodriguez,

Zhang

et al. 2024

IEEE Access

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Real-time locating systems (RTLSs) have proven to be a practical and effective solution for monitoring positions/status of humans and other entities in industrial environments, ensuring safe and efficient automated operations, by responding in real-time to unexpected events, such as the proximity of human workers to autonomous mobile robots (AMRs). This work focuses on evaluating and modeling the performance of two complementary RTLSs targeting human localization in both static and mobile conditions within a realistic industrial environment in operational conditions; with the aim of integrating live positioning information into digital twins (DT) for industrial use. Both the primary RTLS examined, an ultra-wide band (UWB) radio-based system; and the secondary RTLS, an optimized camera vision (CV)-based system with three surveillance cameras introduced as a backup RTLS, exhibited a similar median accuracy of 12-13 cm in static conditions, being the one of the UWB system slightly degraded down to 19 cm in presence of human shadowing. In human mobility conditions, the median accuracy values were further debased by 4 and 13 cm for the UWB and CV systems, respectively, indicating a limited real-time fluctuation, sufficiently bounded to guarantee the safety of human workers based on the readings of either of the primary or secondary RTLS systems. Based on the observed performance, a safety protocol for human detection in operational production scenarios was established, considering operational safety margins around humans of 1-2 m, which could be further leveraged by centralized monitoring and control entities such as industrial digital twins. The localization accuracy of the systems is characterized by means of error functions quantifying the distance to ground truth (GT) points through Gamma distribution functions using maximum likelihood estimates (MLEs). The proposed models are practical for implementation in system level simulators or industrial digital twin tools considering akin industrial environments. The different observations presented along the paper are useful for advanced industrial operation planning and optimization considerations.

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Section: ) Performance In Static Conditionscontrasting

confidence: 40%

Section: Related Workmentioning

confidence: 99%

Experimental Evaluation and Modeling of the Accuracy of Real-Time Locating Systems for Industrial Use

Valiollahi,

Rodriguez,

Zhang

et al. 2024

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Additionally, the AMRs are configured to self-navigate the industrial lab, following predefined routes and missions. This fact, initially designed to maximize the performance in industrial processes involving mobile robots [27], simplifies the radio propagation analysis by automating the measurement process, ensuring route repeatability with cmlevel accuracy. Thus, the RSRP can be acquired given the different locations of the AMR in the factory.…”

Section: B 5g Nr Physical Channel and Measurement Equipmentmentioning

confidence: 99%

FR2 5G Networks for Industrial Scenarios: Experimental Characterization and Beam Management Procedures in Operational Conditions

Ramírez-Arroyo,

López,

Rodríguez

et al. 2024

IEEE Trans. Veh. Technol.

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Industrial environments constitute a challenge in terms of radio propagation due to the presence of machinery and the mobility of the different agents, especially at mmWave bands. This paper presents an experimental evaluation of a FR2 5G network deployed in an operational factory scenario at 26 GHz. The experimental characterization, performed with autonomous mobile robots that self-navigate the industrial lab, leads to the analysis of the received power along the factory and the evaluation of reference path gain models. The proposed assessment deeply analyzes the physical layer of the communication network under operational conditions. Thus, two different network configurations are assessed by measuring the power received in the entire factory, providing a comparison between deployments. Additionally, beam management procedures, such as beam recovery, beam sweeping or beam switching, are analyzed since they are crucial in environments where mobile agents are involved. They aim for a zero interruption approach based on reliable communications. The results analysis shows that beam recovery procedures can perform a beam switching to an alternative serving beam with power losses of less than 1.6 dB on average. Beam sweeping analysis demonstrates the prevalence of the direct component in Line-of-Sight conditions despite the strong scattering component and large-scale fading in the environment.

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“…Multiple technologies have been proposed in the past to perform indoor localization, many of which have demonstrated good localization performance for different use cases. Regarding this study, multiple articles [26][27][28][29], aim to compare technologies such as RFID, Ultrasonic Sensors, Bluetooth Low Energy, Ultra-Wide-band, and Wi-Fi in order to identify occupancy patterns and profiles in indoor spaces. The basic specifications of some indoor positioning technologies are presented in Table 1.…”

Section: Related Workmentioning

confidence: 99%

Indoor Content Delivery Solution for a Museum Based on BLE Beacons

Verde,

Romero,

Faria

et al. 2023

Sensors

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The digital transformation advancement enables multiple areas to provide modern services to their users. Culture is one of the areas that can benefit from these advances, more specifically museums, by presenting many benefits and the most emergent technologies to the visitors. This paper presents an indoor location system and content delivery solution, based on Bluetooth Low Energy Beacons, that enable visitors to walk freely inside the museum and receive augmented reality content based on the acquired position, which is done using the Received Signal Strength Indicator (RSSI). The solution presented in this paper was created for the Foz Côa Museum in Portugal and was tested in the real environment. A detailed study was carried out to analyze the RSSI under four different scenarios, and detection tests were carried out that allowed us to measure the accuracy of the room identification, which is needed for proper content delivery. Of the 89 positions tested in the four scenarios, 70% of the received signals were correctly received throughout the entire duration of the tests, 20% were received in an intermittent way, 4% were never detected and 6% of unwanted beacons were detected. The signal detection is fundamental for the correct room identification, which was performed with 96% accuracy. Thus, we verified that this technology is suitable for the proposed solution.

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Performance Evaluation of a UWB Positioning System Applied to Static and Mobile Use Cases in Industrial Scenarios

Cited by 12 publications

References 32 publications

Experimental Evaluation and Modeling of the Accuracy of Real-Time Locating Systems for Industrial Use

Experimental Evaluation and Modeling of the Accuracy of Real-Time Locating Systems for Industrial Use

FR2 5G Networks for Industrial Scenarios: Experimental Characterization and Beam Management Procedures in Operational Conditions

Indoor Content Delivery Solution for a Museum Based on BLE Beacons

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