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    Wyświetlanie 1-6 z 6
    Tytuł:
    Sensor performance and cut-off wavelength tradeoffs of III-V focal plane arrays
    Autorzy:
    James, Jonathan Ch.
    Haran, Terence L.
    Lane, Sarah E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2204205.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    infrared focal plane arrays
    III-V semiconductor infrared detector technologies
    infrared sensor performance modelling
    infrared sensor design
    mid-wave and longwave infrared sensors
    Opis:
    Infrared detector technologies engineered from III-V semiconductors such as strained-layer superlattice, quantum well infrared photodetectors, and quantum dot infrared photodetectors provide additional flexibility to engineer bandgap or spectral response cut-offs compared to the historical high-performance detector technology of mercury/cadmium/telluride. The choice of detector cut-off depends upon the sensing application for which the system engineer is attempting to maximize performance within an expected ensemble of operational scenarios that define objects or targets to be detected against specific environmental backgrounds and atmospheric conditions. Sensor performance is typically characterised via one or more metrics that can be modelled or measured experimentally. In this paper, the authors will explore the impact of detector cut-off wavelength with respect to different performance metrics such as noise equivalent temperature difference and expected target detection or identification ranges using analytical models developed for several representative sensing applications encompassing a variety of terrestrial atmospheric conditions in the mid-wave and long-wave infrared wavelength bands. The authors will also report on their review of recently published literature concerning the relationships between cut-off wavelength and the other detector performance characteristics such as quantum efficiency or dark current for a variety of detector technologies.
    Źródło:
    Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144570
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal navigation for blind people
    Autorzy:
    Marzec, Paweł
    Kos, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2090710.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    blind/visually impaired person
    GPS
    infrared matrix
    infrared sensors
    low-energy measurement systems
    mobile robots
    satellite navigation
    thermal navigation
    osoba niewidoma
    osoba niedowidząca
    matryca podczerwieni
    czujniki podczerwieni
    systemy pomiarowe niskoenergetyczne
    roboty mobilne
    nawigacja satelitarna
    nawigacja termiczna
    Opis:
    This article presents a system of precise navigation for a visually impaired person which uses GPS navigation and an infrared sensor in the form of an infrared matrix. The presented system allows determining the orientation and distance of a blind person relative to a selected object, e.g. a wall or road edge. The application of the above solution facilitates a significant increase in the accuracy of determining the position of a blind person compared to the accuracy offered by commonly used ground satellite devices. The system uses thermal energy accumulated in the environment without the need to generate additional signals. The main parts of the system are a simple infrared matrix, data processing system and vibrating wristband. Messages and navigation warnings are sent to a blind person in the form of a vibration code. The article describes the method of determining the path of a specified width and distance from the wall of a building, curb, etc., along which a blind person should move. The article additionally describes the method of determining the orientation of a blind person depending on the selected object. Such a method facilitates verifying whether the visually impaired person is moving according to the indicated direction. The method can also be used to navigate mobile robots. Due to the use of natural energy for data registration and processing, the mobile navigation system can be operated for a long time without the need to recharge the battery.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136038, 1--11
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal navigation for blind people
    Autorzy:
    Marzec, Paweł
    Kos, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2173567.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    blind/visually impaired person
    GPS
    infrared matrix
    infrared sensors
    low-energy measurement systems
    mobile robots
    satellite navigation
    thermal navigation
    osoba niewidoma
    osoba niedowidząca
    matryca podczerwieni
    czujniki podczerwieni
    systemy pomiarowe niskoenergetyczne
    roboty mobilne
    nawigacja satelitarna
    nawigacja termiczna
    Opis:
    This article presents a system of precise navigation for a visually impaired person which uses GPS navigation and an infrared sensor in the form of an infrared matrix. The presented system allows determining the orientation and distance of a blind person relative to a selected object, e.g. a wall or road edge. The application of the above solution facilitates a significant increase in the accuracy of determining the position of a blind person compared to the accuracy offered by commonly used ground satellite devices. The system uses thermal energy accumulated in the environment without the need to generate additional signals. The main parts of the system are a simple infrared matrix, data processing system and vibrating wristband. Messages and navigation warnings are sent to a blind person in the form of a vibration code. The article describes the method of determining the path of a specified width and distance from the wall of a building, curb, etc., along which a blind person should move. The article additionally describes the method of determining the orientation of a blind person depending on the selected object. Such a method facilitates verifying whether the visually impaired person is moving according to the indicated direction. The method can also be used to navigate mobile robots. Due to the use of natural energy for data registration and processing, the mobile navigation system can be operated for a long time without the need to recharge the battery.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136038
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Moving object detection in car traffic with implementation of optical sensors
    Autorzy:
    Szablata, Piotr
    Łąkowski, Paweł
    Pochmara, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1841238.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    infrared sensors
    linearization algorithm
    collision detection
    blind data algorithm
    tracking objects
    Intel R200
    czujniki podczerwieni
    algorytm linearyzacji
    wykrywanie kolizji
    algorytmy ślepe
    śledzenie obiektów
    Opis:
    In this investigation, the problem of moving object detection - without any knowledge - is classified. It describes a technique that will allow real-time localization with usage of IR sensors. The proposed algorithm is simplistic, and in the future, it might be implemented into any vehicle, premium or entry level. It is guided by AI that must calculate its next moves in the blink of an eye without user noticing any delays. The main problem of moving object recognition was extraction of proper features, description of the events, and choice of only the crucial ones. The presented novel approach does not follow any standard algorithms. It is a practical hardware implementation of custom solution, based on processing system, which can be well situated in the safety modules of future cars.
    Źródło:
    Transport Problems; 2020, 15, 4, cz. 1; 105-116
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A low cost depth sensor-based computer control system for the disabled people
    Autorzy:
    Połok, B.
    Bilski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/114142.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    disabled people
    human-computer interaction
    Kinect
    infrared sensors
    Opis:
    The paper presents the system for support interaction of disabled people using a low-cost computer module. The system is based on the Microsoft Kinect device. Its usability strongly depends on the designed software. The architecture of both software and hardware part of the system is discussed. The tests performed on human volunteers are presented as well. The conducted research confirms the usability of the system, showing its disadvantages and limitations.
    Źródło:
    Measurement Automation Monitoring; 2016, 62, 9; 292-296
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozwój techniki sensorowej jako inteligentna specjalizacja w inżynierii bezpieczeństwa
    Development sensor technology as intelligent expertise in safety engineering
    Autorzy:
    Ignac-Nowicka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/113063.pdf
    Data publikacji:
    2016
    Wydawca:
    STE GROUP
    Tematy:
    inżynieria bezpieczeństwa
    sensory
    bezpieczeństwo gazowe
    proces obrazowania w kamerach
    kamera termowizyjna
    bariera świetlna
    kurtyna świetlna
    safety engineering
    sensors
    safety gaseous
    process imaging cameras
    infrared camera
    light barrier
    light curtain
    Opis:
    W artykule przedstawiono rolę sensorów w systemach monitoringu bezpieczeństwa. Przeanalizowano zastosowanie wybranych grup sensorów dla bezpieczeństwa gazowego oraz dla ochrony stref pracy. Omówiono również zastosowanie sensorów w obrazowaniu dla kamer pracujących w monitoringu bezpieczeństwa maszyn. Dla każdego obszaru zastosowania omówionych sensorów pokazano różne przykłady obecnie stosowanych aplikacji w warunkach przemysłowych. Pokazano zalety i funkcje dostępnych obecnie sensorów na rynku.
    The article presents the role of sensors in monitoring systems of security. They examined the use of selected groups of sensors for safety gaseous and to protect the work zones. It also discusses the use of imaging sensors for cameras working in monitoring of safety machines. For each application area described sensors showing various examples of applications currently used in industry. Showing the advantages and functions of the sensors currently available on the market.
    Źródło:
    Systemy Wspomagania w Inżynierii Produkcji; 2016, 4 (16); 32-42
    2391-9361
    Pojawia się w:
    Systemy Wspomagania w Inżynierii Produkcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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