Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-48784 Zeitschriftenartikel Neumann, Patrick P.; Kohlhoff, Harald; Hüllmann, Dino; Krentel, Daniel; Kluge, Martin; Dzierliński, M.; Lilienthal, A. J.; Bartholmai, Matthias Aerial-based gas tomography - from single beams to complex gas distributions In this paper, we present and validate the concept of an autonomous aerial robot to reconstruct tomographic 2D slices of gas plumes in outdoor environments. Our platform, the so-called Unmanned Aerial Vehicle for Remote Gas Sensing (UAV-REGAS), combines a lightweight Tunable Diode Laser Absorption Spectroscopy (TDLAS) gas sensor with a 3-axis aerial stabilization gimbal for aiming at a versatile octocopter. While the TDLAS sensor provides integral gas concentration measurements, it does not measure the distance traveled by the laser diode's beam nor the distribution of gas along the optical path. Thus, we complement the set-up with a laser rangefinder and apply principles of Computed Tomography (CT) to create a model of the spatial gas distribution from a set of integral concentration measurements. To allow for a fundamental ground truth evaluation of the applied gas tomography algorithm, we set up a unique outdoor test environment based on two 3D ultrasonic anemometers and a distributed array of 10 infrared gas transmitters. We present results showing its performance characteristics and 2D plume reconstruction capabilities under realistic conditions. The proposed system can be deployed in scenarios that cannot be addressed by currently available robots and thus constitutes a significant step forward for the field of Mobile Robot Olfaction (MRO). London Taylor & Francis 2019 European Journal of Remote Sensing 1 16 urn:nbn:de:kobv:b43-487843 10.1080/22797254.2019.1640078 https://creativecommons.org/licenses/by/4.0/deed.de 2019-08-29 OPUS4-52649 Beitrag zu einem Tagungsband Johann, Sergej; Tiebe, Carlo; Kohlhoff, Harald; Bartholmai, Matthias Feasibility Study for Safe Workplaces through automation and digitalization technology with redesigned Smart Sensors and LoRaWAN Monitoring System This project addresses the application of safe and healthy workplaces in offices, chemical laboratories and other workplaces where indoor air quality plays an important role. The LoRaWAN (Long Range Wide Area Network) is used as a communication interface to make sensor data globally accessible. The objectives of the project are to create a sensor node and an online and offline system that collects the data from the sensor nodes and stores it on a local server, in a cloud, and also locally on the node to prevent communication failures. An important point in this project is the development of the sensor nodes and the placement of these in the premises, thus no development work is involved in Building the infrastructure. 2021 SMSI 2021 Proceedings SMSI 2021 Online meeting 03.05.2021 06.05.2021 230 231 2021-05-17 OPUS4-59544 Zeitschriftenartikel Mansurova, Maria; Johann, Sergej; Kohlhoff, Harald; Rurack, Knut; Bartholmai, Matthias; Bell, Jérémy On-Site Analytical Tool Based on Crude Oil Fluorescence and Chemometrics for the Rapid Determination of the Nature and Essential Properties of Oil Spills With the reduction of large oil spills because of stricter regulations and safety measures, the question of how to manage smaller oil spills arises. Few on-site analytical tools are available for first responders or other law enforcement personnel to rapidly test for crude oil in the early management of localized polluted areas. The approach reported here relies on well-described computer-assisted multivariate data analysis of the intrinsic fluorescence fingerprints of crude oils to build a multivariate model for the rapid classification of crude oils and the prediction of their properties. Thanks to a dedicated robust portable reader, the method allowed classification and accurate prediction of various properties of crude oil samples like density (according to API, the American Petroleum Institute and viscosity as well as composition parameters such as volume fractions of paraffins or aromatics. In this way, autonomous operation in on-site or in-the-field applications becomes possible based on the direct (undiluted and untreated) measurement of samples and a rapid, tablet-operated readout system to yield a robust and simple analytical test with superior performance. Testing in real-life scenarios allowed the successful classification and prediction of a number of oil spill samples as well as weathered samples that closely resemble samples collected by first responders. American Chemical Society (ACS) 2024 ACS ES&T Water 4 2 621 627 urn:nbn:de:kobv:b43-595442 10.1021/acsestwater.3c00648 https://creativecommons.org/licenses/by/4.0/deed.de 2024-02-22 OPUS4-48699 Beitrag zu einem Tagungsband Winkler, Nicolas P.; Neumann, Patrick P.; Hüllmann, Dino; Kohlhoff, Harald; Bartholmai, Matthias; Bennetts, V. H.; Lilienthal, A. J. Remote Gas Sensing with Multicopter-Platforms This presentation gives an introduction to the gas-sensitive aerial robots developed at BAM, including various application examples in the field of mobile robot olfaction: gas source localization and gas distribution mapping. Gesellschaft zur Förderung angewandter Informatik e. V. (GFaI) 2019 Tagungsband des zweiten Innovationsforums: Autonome, mobile Dienste – Services für Mobilität 2019 978-3-942709-22-4 Zweites Innovationsforum "Autonome, mobile Dienste; Services für Mobilität" Berlin, Germany 04.06.2019 05.06.2019 24 34 2019-08-19 OPUS4-49506 Beitrag zu einem Tagungsband Johann, Sergej; Kohlhoff, Harald; Gawlitza, Kornelia; Bell, Jérémy; Mansurova, Maria; Tiebe, Carlo; Bartholmai, Matthias Semi-automatic Gas Measurement Device Based on Fluorescent Multi-gas Sensors This paper describes the development of a semi-automatic gas measurement device presenting potentially a broad range of applications, noteworthy in the agricultural sector. Non-reversible fluorescent molecular sensors were designed and syn-thesized. Upon, integration into a hydrogel matrix with an optimal ratio of co-solvents, the sensors reacting selectively to ammonia were illuminated by excitation light to produce a concentration-correlated fluorescence emission. An automated mechanical-elec-trical device initiates a given gas mixture and thus simulates con-centrations similar to a threshold value. The aim of this project is to develop a sensor or a low-cost method which can monitor low concentrations of harmful gases and aid in their elimination or regulation in livestock housing, barns or stables. IEEE 2019 Proceedings of the IEEE Sensors 2019 978-1-7281-1634-1 IEEE Sensors 2019 Montreal, Canada 27.10.2019 30.10.2019 88 92 2019-11-06 OPUS4-52576 Beitrag zu einem Tagungsband Gawlitza, Kornelia; Johann, Sergej; Mansurova, Maria; Kohlhoff, Harald; Tiebe, Carlo; Bell, Jérémy; Bartholmai, Matthias; Rurack, Knut Semi-automatic Measurement Device for Long-Term Monitoring of Ammonia in Gas Phase In the present paper the development of a semi-automated device for long-term monitoring of gaseous ammonia is described. A sensor material was produced that changes its optical properties in the pres-ence of low concentrations of ammonia in air. The implementation into an electronic device enables precise, simple, economic and fast monitoring of low concentrations of harmful gases, like ammonia, and hence can help to improve the climate monitoring in livestock housing, barns or stables. 2021 SMSI 2021 Proceedings SMSI 2021 Online meeting 03.05.2021 06.05.2021 133 134 2021-05-06 OPUS4-50867 Beitrag zu einem Tagungsband Gawlitza, Kornelia; Johann, Sergej; Mansurova, M.; Kohlhoff, Harald; Tiebe, Carlo; Bell, Jérémy; Bartholmai, Matthias; Rurack, Knut Semi-automatic Measurement Device for Long-Term Monitoring of Ammonia in Gas Phase The present paper describes the development of a sensor material that changes its fluorescence in the presence of gaseous ammonia in a relevant concentration range. The implementation into a semi-automatic gas measurement device enables low-cost, precise, simple and fast monitoring of low con-centrations of harmful gases, like ammonia, and hence can help to improve the climate monitoring in livestock housing, barns or stables. 2020 SMSI 2020 Proceedings SMSI 2020 Meeting was canceled 133 134 10.5162/SMSI2020/B5.4 2020-06-11 OPUS4-46556 Beitrag zu einem Tagungsband Johann, Sergej; Mansurova, Maria; Kohlhoff, Harald; Gkertsos, Aris; Neumann, Patrick P.; Bell, Jérémy; Bartholmai, Matthias Wireless Mobile Sensor Device for in-situ Measurements with Multiple Fluorescent Sensors This paper describes a wireless mobile prototype able to perform optical measurements by means of a miniatur-ized spectrometer for low light analysis, e.g. fluorescent sensors. Evaluations, calculations, calibration management and result display are performed by a computer or a standard tablet. The device was designed primarily to detect traces of oil in drinking or ground water and for the analyses of crude oils. However, it can also address a wide range of fluorescent sensors. The fast and user-friendly inspection of water quality or oil properties, as well as the adaptability and mobility, make the device attractive for a variety of users. Further application areas could be easily imple-mented by adapting the optics and the software (database, data processing and calibration plots, etc.) New Delhi, India IEEE 2018 Proceedings of the IEEE Sensors 2018 978-1-5386-4707-3 IEEE Sensors 2018 New Delhi, India 28.10.2018 31.10.2018 1067 1070 2018-11-12