Low-altitude contour mapping of radiation fields using UAS swarm

Cook, Zachary; Kazemeini, Monia; Barzilov, Alexander; Yim, Woosoon

doi:10.1007/s11370-019-00277-8

Cited by 16 publications

(9 citation statements)

References 13 publications

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“…There are other concepts of surface analysis, such as contour maps (isolines), which have been widely used in various fields to represent the study environment, instead of specific data. In medicine [35,36], contour maps are used for the segmentation of twodimensional images, which allows for the elimination of blurring effects and improves the identification of regions corresponding to the study objects. In topography [37][38][39], contour maps are used to indicate elevations and features of geographical accidents.…”

Section: Introductionmentioning

confidence: 99%

Bearing Severity Fault Evaluation Using Contour Maps—Case Study

et al. 2021

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Increasing industrial competitiveness has led to an increased global interest in condition monitoring. In this sector, rotating machinery plays an important role, where the bearing is one of the most critical components. Many vibration-based signal treatments are already being used to identify features associated with bearing faults. The information embedded in such features are employed in the construction of health indicators, which allow for evaluation of the current operating status of the machine. In this work, the use of contour maps to represent the diagnosis map of a bearing, used as a health map, is presented for the first time. The results show that the proposed method is promising, allowing for the satisfactory detection and evaluation of the severity of bearing damage. In this initial stage of the research, our results suggest that this method can improve the classification of bearing faults and, therefore, optimise maintenance processes.

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Section: Introductionmentioning

confidence: 99%

Bearing Severity Fault Evaluation Using Contour Maps—Case Study

et al. 2021

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“…A multiple formation of UAVs was proposed for cooperative source seeking and contour mapping. While Han et al [ 175 ] proposed the use of low-cost UAV formation (e.g., fixed-wing aircrafts) in four different scenarios, which included the study of a decentralized formation strategy to increase its robustness in the case of a communication failure (with the GCS) and different types of formations (circular and square), Cook et al [ 176 ] considered a circular formation of three multi-rotors to discover the radiation intensity gradient for low altitude and clustered environments (only feasible with this kind of platforms). The latter used a plug-and-play concept for the integration of the CZT detectors into the platforms.…”

Section: Mobile Radiation Detection Systemsmentioning

confidence: 99%

State-of-the-Art Mobile Radiation Detection Systems for Different Scenarios

Marques

Vale

Vaz

2021

Sensors

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In the last decade, the development of more compact and lightweight radiation detection systems led to their application in handheld and small unmanned systems, particularly air-based platforms. Examples of improvements are: the use of silicon photomultiplier-based scintillators, new scintillating crystals, compact dual-mode detectors (gamma/neutron), data fusion, mobile sensor networks, cooperative detection and search. Gamma cameras and dual-particle cameras are increasingly being used for source location. This study reviews and discusses the research advancements in the field of gamma-ray and neutron measurements using mobile radiation detection systems since the Fukushima nuclear accident. Four scenarios are considered: radiological and nuclear accidents and emergencies; illicit traffic of special nuclear materials and radioactive materials; nuclear, accelerator, targets, and irradiation facilities; and naturally occurring radioactive materials monitoring-related activities. The work presented in this paper aims to: compile and review information on the radiation detection systems, contextual sensors and platforms used for each scenario; assess their advantages and limitations, looking prospectively to new research and challenges in the field; and support the decision making of national radioprotection agencies and response teams in respect to adequate detection system for each scenario. For that, an extensive literature review was conducted.

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“…A dual mode CLYC sensor is based on a bright elpasolite scintillator (3.31 g/cm 3 density) that allows for simultaneous neutron and photon sensing by a single detector cell. Depending on the lithium isotopic composition of CLYC, it can be used as a thermal neutron sensor via 6 Li(n,)t reaction (thermal-neutron's signature at the 3-MeV gamma equivalent energy region) or as a fast neutron sensor via 35 Cl(n,p) 35 S reaction with Q value of 615 keV, or both. In the (n,p) reaction case, the emitted proton's energy equals to 615 keV plus the incident neutron's energy: hence, the neutron energy can be gathered from the measured full energy proton peak value.…”

Section: Clyc Radiation Sensormentioning

confidence: 99%

“…This data can be used for radiation contamination analysis in space and time, e.g. for mapping of unsafe zones [6]. Cooperative sensing can be achieved using several UAS: such as mapping of the borders of a contaminated zone or localization of lost sources.…”

Section: Introductionmentioning

confidence: 99%

Dual-Mode Radiation Sensor for UAS Platforms

Barzilov

Kazemeini

2019

The 6th International Electronic Conference on Sensors and Applications

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Remote sensing technologies are important for radiation safety and environmental security applications. A dual-mode Cs2LiYCl6:Ce3+ (CLYC) sensor was developed for simultaneous neutron measurements and gamma-ray spectroscopy. To keep users away from hazardous areas, an unmanned aerial system was used as a mobile sensor platform. The sensor was integrated into a multicopter platform as a ‘plug and fly’ component allowing deployment in the field conditions. The photon energy resolution of the CLYC sensor was measured as less than 5% at 662 keV. The detection of neutrons was achieved via 6Li(n,α)t reaction. The sensor’s signal communication and data fusion were programmed using robot operating system framework, as well as on-board signal analysis functions including the neutron-photon pulse shape discrimination and the identification of photo peaks in the gamma spectrum. These data with added real-time kinematic GPS and time stamps were reported to the user enabling real time awareness of the monitored area, further analysis in temporal and spatial domains, and radiation mapping and source search tasks.

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Low-altitude contour mapping of radiation fields using UAS swarm

Cited by 16 publications

References 13 publications

Bearing Severity Fault Evaluation Using Contour Maps—Case Study

Bearing Severity Fault Evaluation Using Contour Maps—Case Study

State-of-the-Art Mobile Radiation Detection Systems for Different Scenarios

Dual-Mode Radiation Sensor for UAS Platforms

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