Search results for "FMC"
showing 10 items of 13 documents
Fast ultrasonic phased array inspection of complex geometries delivered through robotic manipulators and high speed data acquisition instrumentation
2016
Performance of modern robotic manipulators has enabled research and development of fast automated non-destructive testing (NDT) systems for complex geometries. This paper presents recent outcomes of work aimed at removing the bottleneck due to data acquisition rates, to fully exploit the scanning speed of modern 6-DoF manipulators. State of the art ultrasonic instrumentation has been integrated into a large robot cell to enable fast data acquisition, high scan resolutions and accurate positional encoding. A fibre optic connection between the ultrasonic instrument and the server computer enables data transfer rates up to 1.6GB/s. Multiple data collection methods are compared. Performance of …
Using coded excitation to maintain signal to noise for FMC+TFM on attenuating materials
2019
Ultrasonic Non-Destructive Evaluation using Full Matrix Capture (FMC) and Total Focusing Method (TFM) is used for high resolution imaging as every pixel is in optimal focus. FMC excites one element in turn, so operates with lower transmitted energy compared to phased array beamforming. The energy at a reflector is further reduced by the broad directivity pattern of the single element. The large number of Tx/Rx A-scans that contribute to each pixel recover the Signal-to-Noise Ratio (SNR) in the final TFM image. Maintaining this in the presence of attenuating materials is a challenge because relevant information in each A-scan signal is buried in the thermal noise, and the TFM process assumes…
The virtuous cycle of trust. Unveiling clues to successful innovation in the Fast Moving Consumer Goods industry
2022
PurposeThis paper aims to shed light on features of successful innovation and on the role played by downstream open innovation (OI) dynamics in the Fast Moving Consumer Goods (FMCG) industry. It also explores the reasons for the decline in the number of disruptive innovations in this industry in the European Union (EU).Design/methodology/approachThe authors interpret the data in a Kantar consumer panel dataset on disruptive innovations in Spain through an exploratory research including in-depth interviews with 19 managers in the industry.FindingsResults show that downstream open innovation in this industry is mostly limited to the executional stage in the process and highlight the crucial r…
Interchannel Interference and Mitigation in Distributed MIMO RF Sensing
2021
In this paper, we analyze and mitigate the cross-channel interference, which is found in multiple-input multiple-output (MIMO) radio frequency (RF) sensing systems. For a millimeter wave (mm-Wave) MIMO system, we present a geometrical three-dimensional (3D) channel model to simulate the time-variant (TV) trajectories of a moving scatterer. We collected RF data using a state-of-the-art radar known as Ancortek SDR-KIT 2400T2R4, which is a frequency-modulated continuous wave (FMCW) MIMO radar system operating in the K-band. The Ancortek radar is currently the only K-band MIMO commercial radar system that offers customized antenna configurations. It is shown that this radar system encounters th…
Transient Electrical Behaviour of the TF Superconducting Coils of Divertor Tokamak Test Facility During a Fast Discharge
2022
The paper is focused on the electromagnetic analysis of the Toroidal Field (TF) superconducting coils of the Divertor Tokamak Test facility (DTT) when electrical transients occur in the TF coils system: for example, during the operations of the Fast Discharge Units (FDUs) and considering also, the simultaneous occurrence of a fault condition. During the FDU intervention, a transient voltage excitation lasting few microseconds occurs at the TF coil terminals and it electrically stresses the insulations of TF coils itsef. To investigate the voltage distribution across, inside and between different Double Pancakes (DPs) of each TF coil, a lumped parameters circuital model has been developed an…
Ultrasonic phased array inspection of wire plus arc additive manufacture samples using conventional and total focusing method imaging approaches
2019
In this study, three aluminium samples produced by wire + arc additive manufacture (WAAM) are inspected using ultrasonic phased array technology. Artificial defects are machined using a centre drill, ø 3 mm, and electrical discharge machining (EDM), ø 0.5-1 mm, in a cylindrical through-hole topology. The samples are first inspected using a single-element wheel probe mounted on a KUKA robot in order to investigate the feasibility of using a conventional ultrasonic transducer approach. Unfortunately, the wheel probe is found to be unsuitable for scanning the WAAM specimens and ultrasonic phased arrays are employed next. The set-up includes 5 MHz and 10 MHz arrays (128 elements) in direct cont…
Ultrasonic phased array inspection of wire plus arc additive manufacture (WAAM) samples using conventional and total focusing method (TFM) imaging…
2018
In this study, three aluminium samples produced by wire + arc additive manufacture (WAAM) are inspected using ultrasonic phased array technology. Artificial defects are machined using a centre drill, ø3 mm, and electro-discharge machining (EDM), ø0.5-1 mm, in a cylindrical through hole topology. The sample was first inspected by a single element wheel probe mounted on a KUKA robot in order to investigate the feasibility of using a conventional ultrasonic transducer approach. Unfortunately, the wheel probe was found to be unsuitable for scanning of the WAAM specimens and ultrasonic phased arrays were employed next. The setup included 5 MHz and 10 MHz arrays (128 elements) in direct contact w…
Išēmiska insulta ietekme uz smadzeņu angioģenēzi un neiroģenēzi eksperimentālā vidējās cerebrālās artērijas oklūzijas modelī
2021
Insults ir viens no biežākajiem mirstības un invaliditātes cēloņiem pasaulē. Išēmisks insults jeb cerebrāls infarkts (CI) ir sastopamākais insulta veids. CI agrīnās stadijās bojājuma skartajā smadzeņu puslodē ir stimulēta angioģenēze un neiroģenēze, tomēr trūkst datu par to, kā mainās šo procesu norise ilgtermiņā pēc CI. Šī pētījuma mērķis bija noskaidrot, kā mainās angioģenēzes un neiroģenēzes biomarķieru (VEGF, DCX, NeuN) ekspresija 2 mēnešus pēc CI inducēšanas, izmantojot eksperimentālo vidējās cerebrālās oklūzijas modeli. Darbā iegūtie rezultāti liecina, ka 2 mēnešus pēc CI inducēšanas peļu smadzeņu garozā ir samazināta angiogēnā aktivitāte, kā arī ir samazināts neiroblastu skaits neiro…
Angioģenēzes un neiroģenēzes loma išēmiska insulta ilgtermiņa procesos peļu smadzenēs
2022
Insults ir viens no biežāk sastopamajiem mirstības un invaliditātes cēloņiem pasaulē. Lielākā daļa (līdz pat 90%) insulta gadījumu ir išēmiska rakstura. Išēmiska insulta jeb cerebrāla infarkta (CI) pirmās stundās, dienās, nedēļās bojājuma radītās smadzeņu audu hipoksijas un hipoperfūzijas rezultātā bojājuma skartajā smadzeņu puslodē ir stimulēti angioģenēzes un neiroģenēzes procesi, tomēr trūkst datu par to, kā mainās šo procesu norise ilgtermiņā – vairākus mēnešus pēc CI. Pētījuma mērķis bija noskaidrot CI efektus uz peļu tēviņu pro-angiogēno un neiroģenēzes biomarķieru (VEGF un DCX) ekspresiju neiroģenēzē iesaistītajos rajonos 6 mēnešus pēc eksperimentālās vidējās cerebrālās oklūzijas. La…
Human Activity Signatures Captured under Different Directions Using SISO and MIMO Radar Systems
2022
In this paper, we highlight and resolve the shortcomings of single-input single-output (SISO) millimeter wave (mm-Wave) radar systems for human activity recognition (HAR). A 2×2 distributed multiple-input multiple-output (MIMO) radar framework is presented to capture human activity signatures under realistic conditions in indoor environments. We propose to distribute the two pairs of collocated transmitter–receiver antennas in order to illuminate the indoor environment from different perspectives. For the proposed MIMO system, we measure the time-variant (TV) radial velocity distribution and TV mean radial velocity to observe the signatures of human activities. We deploy the Anc…