Sökning: "avalanche detection"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden avalanche detection.

  1. 1. Single Photon LSCM in the NIR Range

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Klara Wallenbro; [2022]
    Nyckelord :LSCM; NIR; SNSPD; LSCM; NIR; SNSPD;

    Sammanfattning : In this thesis a near-infrared laser scanning confocal microscope (NIR-LSCM) is built to operate with optimal performance at 1550nm in combination with simultaneous LED light imaging at 970nm. For detection, a camera equipped with a complementary metal oxide semiconductor (CMOS) sensor and a superconducting nanowire single photon detector (SNSPD) are used for the LED part and the LSCM part, respectively. LÄS MER

  3. 2. Practical evaluation of the viability of sensorsand algorithms to detect falling and burial by avalanche

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Justus Conradi; Patrik Tiainen; [2021]
    Nyckelord :Mechatronics; Master thesis; fall detection; burial detection; avalanche; skiing; IMU; FSR; Mekatronik; mastersavhandling; fallavkänning; begravningsavkänning; lavin; skidåkning; IMU; FSR;

    Sammanfattning : Avalanches kill on average 250 people per year. Fall detection algorithms have been used to detect many different types of falls. In this work, a robust humanoid test rigwas designed and built to investigate the use of proven threshold based fall detection algorithms during skiing. LÄS MER

  4. 3. Design of a UAV-based radio receiver for avalanche beacon detection using software defined radio and signal processing

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och System

    Författare :Richard Hedlund; [2019]
    Nyckelord :Signal processing; Software Defined Radio; Avalanche; Beacon; Antenna; SDR; DSP; Signalbehandling; Mjuvarudefinierad Radio; Lavin; Lavinsändare; Antenn; SDR; DSP;

    Sammanfattning : A fully functional proof of concept radio receiver for detecting avalanche beacons atthe frequency 457 kHz was constructed in the work of this master thesis. The radioreceiver is intended to be mounted on an unmanned aerial vehicle (UAV or drone)and used to aid the mountain rescue teams by reducing the rescue time in findingavalanche victims carrying a transmitting beacon. LÄS MER

  5. 4. Avalanche Visualisation Using Satellite Radar

    Kandidat-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Aron Widforss; [2019]
    Nyckelord :snow science; avalanche detection; satellite SAR; avanor;

    Sammanfattning : Avalanche forecasters need precise knowledge about avalanche activity in large remote areas. Manual methods for gathering this data have scalability issues. Synthetic aperture radar satellites may provide much needed complementary data. LÄS MER

  7. 5. Development and Characterization of Parallel-Plate Avalanche Counters for Nuclear Physics Experiments

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad kärnfysik

    Författare :Matthias Carlsson; [2018]
    Nyckelord :PPAC; Parallel-Plate Avalanche Counters; Gas Ionizing Detector; Gas Amplification; Characterization; NFS; Radioactive source; Am-241; Cf-252; Fission Fragments; Alpha Particles; Time Resolution; Angular Dependence; Gas Pressure Dependence; Townsend Coefficient; PPAC Design; Manufacture; Manufacturing; Mylar foil; Aluminium Evaporation;

    Sammanfattning : Parallel-plate avalanche counters, PPACs, are commonly used to detect fission fragments. The PPAC detects them and mark (very accurately) the time of detection. Such measurements can be used to measure the neutron energy (via time-of-flight) to study neutron-induced fission. LÄS MER