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The gateware calibration unit for the KM3NeT telescope

JOURNAL OF instrumentation 2021年第10期16卷

作者： Calvo, D. Real, R. Amaro, A. van Beveren, V Chiarusi, T. Mastroianni, S. Musico, P. Pellegini, G. Jansweijer, P. Colonges, S. Bozza, C. Nicolau, C. Diaz, A. Ilioni, A. Le Breton, R. Champion, C. Keller, P. Boutonnet, C. Univ Valencia CSIC IFIC Inst Fis Corpuscular Valencia Spain Univ Valencia Valencia Spain Nikhef Natl Inst Subat Phys POB 41882 Amsterdam Netherlands Ist Nazl Fis Nucl Sez Bologna Bologna Italy Ist Nazl Fis Nucl Sez Genova I-16146 Genoa Italy Univ Paris Diderot Sorbonne Paris Cite CEA IRFU APCObserv ParisCNRSIN2P3 Paris France Univ Salerno Fisciano Italy Ist Nazl Fis Nucl Grp Collegato Salerno Dipartimento Matemat Fisciano Italy Ist Nazl Fis Nucl Sez Ronta Rome Italy Univ Granada Dept Comp Architecture & Technol CITIC Granada 18071 Spain Ctr Phys Particules Marseille Marseille France

The KM3NeT collaboration is currently deploying the first detection units of a neutrino observatory in the Mediterranean Sea, which, once completed, will be equipped with thousands of so-called digital optical modules. In addition to the detection units KM3NeT has designed an independent calibration unit, housing a set of calibration instruments, including e.g. an acoustic beacon and a laser beacon. The calibration unit and the embedded software developed to operate it are presented here.

关键词： control and monitor systems online Detector control systems (detector and experiment monitoring and slow-control systems architecture hardware algorithms databases)

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advanced Signal Processing Techniques for Damage Detection in Reinforced Concrete Beams 1

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International conference on Recent Trends in Construction Materials and Structures, ICON 2019

作者： Kavitha, S. Sumangala, K. Joseph Daniel, R. Rajakumar, S. Department of Electronics and Instrumentation Engineering Annamalai University Chidambaram India Department of Civil and Structural Engineering Government College of Engineering Tirunelveli India Department of Manufacturing Engineering Annamalai University Chidambaram India

ISBN: (数字)9789811591624

ISBN: (纸本)9789811591617

Structural health monitoring (SHM) using non-destructive testing (NDT) generally involves measurement of shift in natural frequency of the monitored structure. Vibration sensors play a crucial role in such SHM systems and the present-day SHM systems use commercially available off-the-shelf (COTS) micro-electro mechanical system (MEMS) accelerometers. Reduction in natural frequency indicates the degradation of stiffness and consequential damage of the concrete structures. This paper presents the damage detection of reinforced concrete beams using COT MEMS accelerometer. For this work, four reinforced concrete beams of size 125 × 250 × 3200 mm were cast. Two of them were considered as control and two as damaged beams. Damage was inducted to the beams after 28 days of curing using accelerated corrosion set up. All the four beams were subjected to both static and dynamic tests. The maximum load carrying capacity was determined using the static test, and the signals from vibration test of the beams were taken using COTS MEMS accelerometer. The instrumentation of dynamic test includes data acquisition system with signal conditioning circuit, DAQ measurement hardware and a computer with programmable software and multi storage oscilloscope. The vibration signals acquired from the dynamic test is then analysed using signal processing techniques like fast Fourier transform (FFT) and Morlet wavelet transforms and are compared. From the study, it is concluded that the time–frequency contour map helps to identify the damage in a more effective way than that of FFT analysis. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Natural frequencies

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A case study of the stability of a non-typical bleeder entry system at a *** mine

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International Journal of Mining Science and Technology 2020年第1期30卷 25-31页

作者： T.M.Klemetti M.A.Van Dyke I.B.Tulu D.Tuncay NIOSH Pittsburgh Mining Research Division Pittsburgh 15236USA Department of Mining Engineering West Virginia UniversityMorgantown 26505USA

Longwall abutment loads are influenced by several factors,including depth of cover,pillar sizes,panel dimensions,geological setting,mining height,proximity to gob,intersection type,and size of the *** does proximity to the gob affect pillar loading and entry condition?Does the gob influence depend on whether the abutment load is a forward,side,or rear loading?Do non-typical bleeder entry systems follow the traditional front and side abutment loading and extent concepts?If not,will an improved understanding of the combined abutment extent warrant a change in pillar design or standing support in bleeder entries?This paper details observations made in the non-typical bleeder entries of a moderate depth longwall panel—specifically,data collected from borehole pressure cells and roof extensometers,observations of the conditions of the entries,and numerical modeling of the bleeder entries during longwall *** primary focus was on the extent and magnitude of the abutment loading experienced due to the extraction of the longwall *** to the layout of the longwall panels and bleeder entries,the borehole pressure cells(BPCs)and roof extensometers did not show much change due to the advancing of the first ***,they did show a noticeable increase due to the second longwall advancement,with a maximum of about 4 MPa of pressure increase and 5mmof roof *** observations of the conditions showed little to no change from before the first longwall panel extraction began to when the second longwall panel had been advanced more than 915 *** pillar spalling was observed on the corners of the pillars closest to the longwall gob as well as an increase in water in the *** addition to the observations and instrumentation,numerical modeling was performed to validate modeling procedures against the monitoring results and evaluate the bleeder *** Consulting Group’s FLAC3D numerical modeling software was used to evaluate the bl

关键词： Abutment loading Longwall instrumentation Bore hole pressure cells Pillar loading Yield pillar Bleeder pillar

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Embedded software developments in KM3NeT phase I

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JOURNAL OF instrumentation 2021年第12期16卷

作者： van Beveren, V Real, D. Chiarusi, T. Calvo, D. Mastroianni, S. Musico, P. Pellegrini, G. Jansweijer, P. Colognes, S. Bozza, C. Filippini, F. Nicolau, C. Diaz, A. Natl Inst Subat Phys Nikhef POB 41882 NL-1009 DB Amsterdam Netherlands Univ Valencia IFIC Inst Fis Corpuscular CSIC C Catedrcit Jose Beltran 2 Valencia 46980 Spain Ist Nazl Fis Nucl Sez Bologna Vle C Berti Pichat 6-2 I-40127 Bologna Italy Complesso Univ Monte S Angelo Ist Nazl Fis Nucl Sez Napoli Via Cintia Ed G I-80126 Naples Italy Ist Nazl Fis Nucl Sez Genova Via Dodecaneso 33 I-16146 Genoa Italy Univ Paris Diderot Observ Paris Sorbonne Paris Cite CEA IRFUAPCCNRS IN2P3 F-75205 Paris France Univ Salerno Dipartimento Matemat Via Giovanni Paolo II 132 I-84084 Fisciano Italy Ist Nazl Fis Nucl Grp Collegato Salerno Via Giovanni Paolo II 132 I-84084 Fisciano Italy Ist Nazl Fis Nucl Sez Roma Piazzale Aldo Moro 2 I-00185 Rome Italy Univ Granada Dept Comp Architecture & Technol CITIC E-18071 Granada Spain

The KM3NeT collaboration has already produced more than one thousand acquisition boards, used for building two deep-sea neutrino detectors at the bottom of the Mediterranean Sea, with the aim of instrumenting a volume of several cubic kilometers with light sensors to detect the Cherenkov radiation produced in neutrino interactions. The so-called digital optical modules, house the PMTs and the acquisition and control electronics of the module, the central logic board, which includes a Xilinx FPGA and embedded soft processor. The present work presents the architecture and functionalities of the software embedded in the soft processor of the central logic board.

关键词： software Engineering Neutrino detectors

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Unanticipated Fault Detection Technology for Tip/Tilt Mirror control System of Large Aperture telescope

Unanticipated Fault Detection Technology for Tip/Tilt Mirror...

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2020 International conference on Environment Science and advanced Energy Technologies, ESAET 2020

作者： Wu, Jiajia Yang, Shihai Li, Yun National Astronomica Observatories Nanjing Institute of Astronomical Optics and Technology Chinese Academy of Sciences 188 Bancang Street Nanjing210042 China CAS Key Laboratory of Astronomical Optics and Technology Nanjing Institute of Astronomical Optics and Technology Nanjing210042 China University of Chinese Academy of Sciences Beijing100049 China

Large Aperture telescopes are usually placed in some special environment. Once a malfunction occurs, it's inconvenient for maintenance. This paper presents those unanticipated failures in tip/tilt mirror control system of large aperture telescopes, and tries to propose a detection strategy based on BP neural network. Firstly, the paper analyses the failure mechanism of the software and the hardware of the tip/tilt mirror control system. Then the known fault data are used to train the BP neural network in order to obtain an accurate detection model. Finally, the unanticipated data are mixed into the known fault data, and the model is used to detect unanticipated faults. The simulation results show that the model can be used to detect the unanticipated fault in tip/tilt mirror control system effectively. © Published under licence by IOP Publishing Ltd.

关键词： control systems

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Algorithms for automatic billet straightening machine 58

Algorithms for automatic billet straightening machine

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58th International Scientific conference on Experimental Stress Analysis, EAN 2020

作者： Halama, R. Sikora, J. Fusek, M. Marek, M. Bartecka, J. Czebe, J. Guras, R. Wagnerova, R. Mahdal, M. Department of Applied Mechanics Faculty of Mechanical Engineering VŠB Technical University of Ostrava 17. listopadu 2172/15 Ostrava708 00 Czech Republic Department of Control Systems and Instrumentation Faculty of Mechanical Engineering VŠB Technical University of Ostrava 17. Listopadu 2172/15 Ostrava708 00 Czech Republic

ISBN: (纸本)9788024844510

This scientific contribution presents current results of cooperation focused on the automatic billet straightening machine development. An experimental study of three-point bending is shortly presented to explain basic ideas of the straightening. Main variants of straightening are briefly described. Some material parameters have to be properly determined for a new material in the straightening process, what is solved by creation of software for their estimation from a mapping regime of straightening. © 2020 Experimental Stress Analysis - 58th International Scientific conference, EAN 2020. All rights reserved.

关键词： Stress analysis

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Comparative study of anti-windup techniques on performance of adaptive cruise control 1

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16th control instrumentation System conference, CISCON 2019

作者： Jain, Ankur Saikia, Prangshu NIT Sichar Assam India

ISBN: (数字)9789811546761

ISBN: (纸本)9789811546754

Over recent years, a steep rise in the number of auto mobiles has been recorded on the limited capacity roads. As a result, this led to investments in the fields of accident minimisation research in vehicles and the development of newer models of auto mobiles with enhanced safety features. advanced techniques such as adaptive cruise control (ACC), collision avoidance and collision warning system (CWS) are some of the fruitful outcomes that have proved their effectiveness in the prevention of hazards from time to time. In this paper, we will do a comparative study of two anti-windup strategies (back calculation, conditional integration) in a PID speed controller. These techniques are used to mitigate the undesired phenomenon known as integrator windup whenever the control input leads to events that saturate the actuator limits. A nonlinear vehicular dynamic model is linearised at the desired speed set-point, and the effect of these anti-windup schemes on cruise control of the vehicular model is compared. The proposed procedure can also be extended for different set-point and environment condition for an advanced method such as gain scheduling. These techniques can be incorporated in the existing controller with minute changes in software architecture. We will evaluate these schemes based on steady-state error analysis through simulation. © Springer Nature Singapore Pte Ltd. 2020.

关键词： Adaptive cruise control

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Applied instrumentation course for undergraduate thermal-fluid sciences

Applied instrumentation course for undergraduate thermal-flu...

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2020 ASEE Virtual Annual conference, ASEE 2020

作者： Bryner, Elliott Dannelley, Daniel Department of Mechanical Engineering Embry-Riddle Aeronautical University PrescottAZ United States

This paper explains the development of an applied instrumentation course for Mechanical and Aerospace Engineering students at Embry-Riddle Aeronautical University that focuses on the use of probes and sensors to make measurements in thermal-fluid systems and using the measurements of fundamental properties to determine derived quantities common in engineering testing. The thermal-fluid sciences lecture and lab builds on the fundamental material covered in the first semester measurement and instrumentation course. More advanced application of concepts such as uncertainty and error propagation, filtering and signal conditioning, and data reduction and presentation techniques are introduced in the lecture portion of the course. In the laboratory portion of the course students participate in a number of lab activities that range from using existing experimental set-ups to designing, building, and making measurements on a new laboratory apparatus. Students have the opportunity to use several types of instruments such as pressure transducers, thermocouples, RTDs, and thermistors to measure fundamental quantities of temperature and pressure which the students will then use to determine derived quantities such as volumetric or mass flow rate. Students work with a number of types of probes (Kiel probes, pitot-static tubes), measurement systems (square edge orifice plate, venture tube), and experimental equipment to make these measurements. The students use National Instruments data acquisition and control hardware and LabVIEW software extensively in the lab portion of the course. This two credit course, one credit lecture and one credit lab, places a high level of emphasis on critical thinking and originality through several open-ended laboratory assignments and a group project. These activates focus on planning an experimental program, designing the measurement system, reducing the data, and interpreting the results. Students will report the results of laboratory activities

关键词： Students

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Performance of the Cherenkov telescope Array in the presence of clouds 37

Performance of the Cherenkov Telescope Array in the presence...

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37th International Cosmic Ray conference, ICRC 2021

作者： Pecimotika, Mario Adamczyk, Katarzyna Prester, Dijana Dominis Gueta, Orel Hrupec, Dario Maier, Gernot Mićanović, Saša Pavletić, Lovro Sitarek, Julian Sobczyńska, Dorota Szanecki, Michal Abdalla, H. Abe, H. Abe, S. Abusleme, A. Acero, F. Acharyya, A. Acín Portella, V. Ackley, K. Adam, R. Adams, C. Adhikari, S.S. Aguado-Ruesga, I. Agudo, I. Aguilera, R. Aguirre-Santaella, A. Aharonian, F. Alberdi, A. Alfaro, R. Alfaro, J. Alispach, C. Aloisio, R. Alves Batista, R. Amans, J.-P. Amati, L. Amato, E. Ambrogi, L. Ambrosi, G. Ambrosio, M. Ammendola, R. Anderson, J. Anduze, M. Angüner, E.O. Antonelli, L.A. Antonuccio, V. Antoranz, P. Anutarawiramkul, R. Aragunde Gutierrez, J. Aramo, C. Araudo, A. Araya, M. Arbet-Engels, A. Arcaro, C. Arendt, V. Armand, C. Armstrong, T. Arqueros, F. Arrabito, L. Arsioli, B. Artero, M. Asano, K. Ascasíbar, Y. Aschersleben, J. Ashley, M. Attinà, P. Aubert, P. Singh, C.B. Baack, D. Babic, A. Backes, M. Baena, V. Bajtlik, S. Baktash, A. Balazs, C. Balbo, M. Ballester, O. Ballet, J. Balmaverde, B. Bamba, A. Bandiera, R. Baquero Larriva, A. Barai, P. Barbier, C. Barbosa Martins, V. Barcelo, M. Barkov, M. Barnard, M. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Bastieri, D. Batista, P.I. Batkovic, I. Bauer, C. Bautista-González, R. Baxter, J. Becciani, U. Becerra González, J. Becherini, Y. Beck, G. Becker Tjus, J. Bednarek, W. Belfiore, A. Bellizzi, L. Belmont, R. Benbow, W. Berge, D. Bernardini, E. Bernardos, M.I. Bernlöhr, K. Berti, A. Berton, M. Bertucci, B. Beshley, V. Bhatt, N. Bhattacharyya, S. Bhattacharyya, W. Bhattacharyya, S. Bi, B. Bicknell, G. Biederbeck, N. Bigongiari, C. Biland, A. Bird, R. Bissaldi, E. Biteau, J. Bitossi, M. Blanch, O. Blank, M. Blazek, J. Bobin, J. Boccato, C. Bocchino, F. Boehm, C. Bohacova, M. Boisson, C. Boix, J. Bolle, J.-P. Bolmont, J. Bonanno, G. Bonavolontà, C. Bonneau Arbeletche, L. Bonnoli, G. Bordas, P. Borkowski, J. Bórquez, S. Bose, R. Bose, D. Bosnjak, Z. Bottacini, E. Böttcher, M. Department of Physics University of Rijeka Radmile Matejčić 2 Rijeka Croatia Virovitica University of Applied Sciences Matije Gupca 78 Virovitica Croatia Department of Astrophysics University of Lódź Pomorska 149 Lódź Poland Platanenallee 6 Zeuthen Germany Department of Physics J. J. Strossmayer University of Osijek Trg Ljudevita Gaja 6 Osijek Croatia Department of Informatics University of Lódź Pomorska 149 Lódź Poland Centre for Space Research North-West University Potchefstroom2520 South Africa Institute for Cosmic Ray Research University of Tokyo 5-1-5 Kashiwa-no-ha Chiba Kashiwa277-8582 Japan Pontificia Universidad Católica de Chile Av. Libertador Bernardo O'Higgins 340 Santiago Chile AIM CEA CNRS Université Paris-Saclay Université Paris Diderot Sorbonne Paris Cité CEA Paris-Saclay IRFU/DAp Bat 709 Orme des Merisiers Gif-sur-Yvette91191 France Centre for Advanced Instrumentation Dept. of Physics Durham University South Road DurhamDH1 3LE United Kingdom Port d'Informació Científica Edifici D Carrer de l'Albareda Cerdanyola del Vallès Bellaterrra08193 Spain School of Physics and Astronomy Monash University MelbourneVIC3800 Australia Laboratoire Leprince-Ringuet École Polytechnique UMR 7638 CNRS IN2P3 Institut Polytechnique de Paris Palaiseau91128 France Department of Physics Columbia University 538 West 120th Street New YorkNY10027 United States University of Oslo Department of Physics Sem Saelandsvei 24 - PO Box 1048 Blindern OsloN-0316 Norway EMFTEL Department IPARCOS Universidad Complutense de Madrid Madrid28040 Spain Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n Granada18008 Spain Campus UAB Carrer de Can Magrans s/n Cerdanyola del Vallés08193 Spain Instituto de Física Teórica UAM/CSIC Departamento de Física Teórica Universidad Autónoma de Madrid Campus de Cantoblanco UAM c/Nicolás Cabrera 13-15 Madrid28049 Spain Dublin Institute for Advanced Studies 31 Fitzwilliam Place

The Cherenkov telescope Array (CTA) is the future ground-based observatory for gamma-ray astronomy at very high energies. The atmosphere is an integral part of every Cherenkov telescope. Different atmospheric conditions, such as clouds, can reduce the fraction of Cherenkov photons produced in air showers that reach ground-based telescopes, which may affect the performance. Decreased sensitivity of the telescopes may lead to misconstructed energies and spectra. This study presents the impact of various atmospheric conditions on CTA performance. The atmospheric transmission in a cloudy atmosphere in the wavelength range from 203 nm to 1000 nm was simulated for different cloud bases and different optical depths using the MODerate resolution atmospheric TRANsmission (MODTRAN) code. MODTRAN output files were used as inputs for generic Monte Carlo simulations. The analysis was performed using the MAGIC Analysis and Reconstruction software (MARS) adapted for CTA. As expected, the effects of clouds are most evident at low energies, near the energy threshold. Even in the presence of dense clouds, high-energy gamma rays may still trigger the telescopes if the first interaction occurs lower in the atmosphere, below the cloud base. A method to analyze very high-energy data obtained in the presence of clouds is presented. The systematic uncertainties of the method are evaluated. These studies help to gain more precise knowledge about the CTA response to cloudy conditions and give insights on how to proceed with data obtained in such conditions. This may prove crucial for alert-based observations and time-critical studies of transient phenomena. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

关键词： Monte Carlo methods

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Progress and tests on the Instrument control Electronics for SOXS 6

Progress and tests on the Instrument Control Electronics for...

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conference on software and Cyberinfrastructure for Astronomy VI held as Part of SPIE Astronomical telescopes and instrumentation conference

作者： Colapietro, M. Capasso, G. D'Orsi, S. Schipani, P. Marty, L. Savarese, S. Coretti, I Campana, S. Claudi, R. Aliverti, M. Baruffolo, A. Ben-Ami, S. Biondi, F. Cosentino, R. D'Alessio, F. D'Avanzo, P. Hershko, O. Kuncarayakti, H. Landoni, M. Munari, M. Pignata, G. Rubin, A. Scuderi, S. Vitali, F. Young, D. Achren, J. Araiza-Duran, J. A. Arcavi, I Brucalassi, A. Bruch, R. Cappellaro, E. Della Valle, M. De Pascale, M. Di Benedetto, R. Gal-Yam, A. Genoni, M. Hernandez, M. Kotilainen, J. Li Causi, G. Mattila, S. Radhakrishnan, K. Rappaport, M. Ricci, D. Riva, M. Salasnich, B. Smartt, S. Sanchez, R. Zanmar Stritzinger, M. Ventura, H. INAF Osservatorio Astron Capodimonte Salita Moiariello 16 I-80131 Naples Italy INAF Osservatorio Astron Trieste Via GB Tiepolo 11 I-34143 Trieste Italy INAF Osservatorio Astron Brera Via Bianchi 46 I-23807 Merate LC Italy INAF Osservatorio Astron Padova Vicolo Osservatorio 5 I-35122 Padua Italy Weizmann Inst Sci Herzl St 234 IL-7610001 Rehovot Israel Harvard Smithsonian Ctr Atrophys Cambridge MA USA Max Planck Inst Extraterr Phys Giessenbachstr 1 D-85748 Garching Germany TNG FGG INAF Rambla JA Fernandez Perez 7 E-38712 Brena Baja TF Spain INAF Osservatorio Astrofis Catania Via S Sofia 78 30 I-95123 Catania Italy INAF Osservatorio Astron Roma Via Frascati 33 I-00078 Monte Porzio Catone Italy Univ Turku Dept Phys & Astron Tuorla Observ FI-20014 Turku Finland Univ Turku Finnish Ctr Astron ESO FINCA FI-20014 Turku Finland Univ Andres Bello Avda Republ 252 Santiago Chile Millennium Inst Astrophys MAS Santiago Chile ESO Karl Schwarzschild Str 2 D-85748 Garching Germany INAF Ist Astrofis Spaziale & Fis Cosm Via Corti 12 I-20133 Milan Italy Queens Univ Belfast Belfast BT7 1NN Antrim North Ireland Incident Angle Oy Capsiankatu 4 A 29 FI-20320 Turku Finland Ctr Invest Opt AC Leon 37150 Mexico Tel Aviv Univ Tel Aviv Israel INAF Osservatorio Astrofis Arcetri Largo E Fermi 5 I-50125 Florence Italy Ist Astrofis & Planetol Spaziali Via Fosso Cavaliere I-00133 Rome Italy Aarhus Univ Ny Munkegade 120 DK-8000 Aarhus Denmark

ISBN: (纸本)9781510636927

The forthcoming SOXS (Son Of X-Shooter) will be a new spectroscopic facility for the ESO New Technology telescope in La Silla, focused on transient events and able to cover both the UV-VIS and NIR bands. The instrument passed the Final Design Review in 2018 and is currently in manufacturing and integration phase. This paper is focused on the assembly and testing of the instrument control electronics, which will manage all the motorized functions, alarms, sensors, and electric interlocks. The electronics is hosted in two main control cabinets, divided in several subracks that are assembled to ensure easy accessibility and transportability, to simplify test, integration and maintenance. Both racks are equipped with independent power supply distribution and have their own integrated cooling systems. This paper shows the assembly strategy, reports on the development status and describes the tests performed to verify the system before the integration into the whole instrument.

关键词： SOXS New Technology telescope control electronics PLC motorized stage control cabinet subrack

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