 Subjects -> ELECTRONICS (Total: 207 journals)
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- Efficient use of expensive components of optic vibration sensor
Authors: Vít Novotný, Petr Sysel, Aleš Prokeš, Pavel Hanák, Karel Slavíček
Pages: 1 - 6
Abstract: This paper studies possible utilization of fiber optic switches for more efficient utilization of expensive electronic components which are the core of long range fiber-based sensors systems. Complex architecture of such systems starting to be used for monitoring of events along various linear objects like railway lines, product lines or object defense perimeters, are based on rather expensive ultra narrow band laser source and interrogation electronics. Possible sharing of these expensive components for sensing on more fiber optic lines is discussed in this work.
PubDate: 2021-09-02
DOI: 10.11601/ijates.v10i1-3.302
Issue No: Vol. 10, No. 1-3 (2021)
- The Optimal Real-Time Video Encoding Scheme for Multi-Camera Panoramic
System Using NVENC
Authors: Jiri Prinosil, Petr Kriz
Pages: 7 - 11
Abstract: Today, modern, powerful, and relatively available computer technology allows the proposal of real-time camera systems working with several video streams. There is also a permanent tendency to increase image resolution, what can be useful for example in some image processing methods in surveillance systems. Given this, an important part of a multi-camera realtime system proposal is optimal and efficient video compression. The modern encoding standards support 4K or 8K video content. One of these standards is H.264 or HEVC and the popular available encoding technology using GPU acceleration is NVENC provided by Nvidia. Many papers deal with the comparison of encoding standards in terms of quality or bitrate savings on testing video sequences [1], [2]. However, this paper is aimed primarily at a comparison of several practical implementations of NVENC technology using different presets of H.264 and HEVC standards. The experiments are mainly focused on testing the encoder’s real-time ability to deal with single video input obtained from the industrial camera using different settings. To do that, some system performance parameters for the continuous monitoring during the NVENC encoding process were chosen. Results in tables I and II are compared, discussed and the best NVENC implementation with encoding scheme is chosen in the context of our briefly introduced novel panoramic system. Finally, the system is fully loaded by the 7 cameras, all streams are encoded using an optimal encoding scheme and a performance limit is established for our hardware configuration.
PubDate: 2021-09-02
DOI: 10.11601/ijates.v10i1-3.304
Issue No: Vol. 10, No. 1-3 (2021)
- Polarization Monitor for High-speed State of Polarization Changes
Detection
Authors: Petr Dejdar, Pavel Hanak, Petr Munster, Tomas Horvath
Pages: 13 - 17
Abstract: The paper describes design of a high-speed polarization monitor system. Describe of hardware design including implementation of FPGA bitstream to the acquisition card and also is presented the graphical user interface (GUI) for processing the measured data. The system is based on Lightwaves2000 Prime controller and a MyRIO device is used for data acquisition. The system is capable sending data from four photodiodes to graphical user interface using the TCP protocol with a sampling frequency of up to 6.5 kS/s. The GUI enables graphical representation of Stokes parameters and also can setup the device parameters. System enables detection of events to an optical fiber caused by changes in ambient conditions using state of polarization (SOP) changes analysis.
PubDate: 2021-12-01
DOI: 10.11601/ijates.v10i1-3.296
Issue No: Vol. 10, No. 1-3 (2021)
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