scholarly journals Feasibility of Discriminating UAV Propellers Noise from Distress Signals to Locate People in Enclosed Environments Using MEMS Microphone Arrays

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 597
Author(s):  
Alberto Izquierdo ◽  
Lara del Val ◽  
Juan J. Villacorta ◽  
Weikun Zhen ◽  
Sebastian Scherer ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Micro Electro Mechanical System ◽  
Microphone Arrays ◽  
Heat Sources ◽  
Sound Sources ◽  
Mems Microphone ◽  
Aerial Vehicle ◽  
Acoustic Array ◽  
Alternative Techniques ◽  
The University

Detecting and finding people are complex tasks when visibility is reduced. This happens, for example, if a fire occurs. In these situations, heat sources and large amounts of smoke are generated. Under these circumstances, locating survivors using thermal or conventional cameras is not possible and it is necessary to use alternative techniques. The challenge of this work was to analyze if it is feasible the integration of an acoustic camera, developed at the University of Valladolid, on an unmanned aerial vehicle (UAV) to locate, by sound, people who are calling for help, in enclosed environments with reduced visibility. The acoustic array, based on MEMS (micro-electro-mechanical system) microphones, locates acoustic sources in space, and the UAV navigates autonomously by closed enclosures. This paper presents the first experimental results locating the angles of arrival of multiple sound sources, including the cries for help of a person, in an enclosed environment. The results are promising, as the system proves able to discriminate the noise generated by the propellers of the UAV, at the same time it identifies the angles of arrival of the direct sound signal and its first echoes reflected on the reflective surfaces.

scholarly journals GEOMATICS ADVANCED TESTINGS FLANKING ARCHAEOLOGICAL RESEARCH. A NOTEWORTHY AREA IN THE NORTHERN NECROPOLIS OF HIERAPOLIS OF FRIGIA (TK)

2021 ◽  
Author(s):  
Lorenzo Teppati Losè ◽  
Antonia Spanò ◽  
Anna Anguissola
Keyword(s):  
High Resolution ◽  
Unmanned Aerial Vehicle ◽  
3D Models ◽  
Archaeological Research ◽  
Rapid Mapping ◽  
Processing Strategies ◽  
Aerial Vehicle ◽  
Data Acquisition And Processing ◽  
The University ◽  
Epigraphic Evidence

The paper relates the studies performed on an archaeological context aimed at experimenting aerial and terrestrial methods of rapid mapping survey with those dedicated to archaeological research. Different UAV (Unmanned aerial vehicle) and 360° camera data acquisition and processing strategies are reported and discussed. The integration and fusion approaches have been investigated taking advantages of co-registration approaches. Archaeologists from the University of Pisa have investigated areas of the northern necropolis at Hierapolis since 2017, exploring the arrangement and use of Roman sarcophagi in their architectural context. Thanks to a full review of the archaeological and epigraphic evidence from Tomb 159c, and thanks to the high detailed 3D models and high-resolution orthophotos derived from geomatics techniques, it has been possible to reconstruct patterns and changes in ownership, use, and movement in a significant section of the necropolis across three centuries.

scholarly journals UCAV PW-124 – A DESIGN EFFORT UNDERTAKEN AT WARSAW UNIVERSITY OF TECHNOLOGY

Aviation ◽  
2005 ◽  
Vol 9 (4) ◽  
pp. 3-15
Author(s):  
Zdobyslaw Goraj
Keyword(s):  
European Union ◽  
Conceptual Design ◽  
Unmanned Aerial Vehicle ◽  
Mission Design ◽  
Research Activity ◽  
The Past ◽  
Acoustic Signature ◽  
University Of Technology ◽  
Aerial Vehicle ◽  
The University

This paper presents a conceptual design project developed at the Warsaw University of Technology and focused on an unmanned aerial vehicle being able to fly at low and medium altitude, with a special emphasis put on selecting the platform best suited for the planned mission. Design and research activity necessary to complete the project successfully is based on the international experience gained by the university team within a number of the past very successful projects, mainly projects supported by European Union within the V and VI scientific frameworks. The project deals with a highly maneuverable unmanned aerial vehicle of low gust sensitivity and reduced radar, infrared, and acoustic signature. Aircraft mission, power unit, aerodynamics and many design details are shown and discussed.

scholarly journals A cross product calibration method for micro-electro mechanical system gyroscope in unmanned aerial vehicle attitude determination system

2020 ◽  
pp. 002029402094494
Author(s):  
Yongjun Wang ◽  
Zhi Li ◽  
Xiang Li
Keyword(s):  
Mechanical System ◽  
Unmanned Aerial Vehicle ◽  
Attitude Determination ◽  
Low Cost ◽  
Integral Form ◽  
Calibration Method ◽  
Micro Electro Mechanical System ◽  
Cross Product ◽  
Integrated Navigation ◽  
Aerial Vehicle

This paper presents a novel calibration method for micro-electro mechanical system gyroscope in attitude measurement system of small rotor unmanned aerial vehicles. This method is based on an observation vector and its cross product, which is especially valuable for the in-field calibration without the aid of external equipment. By analysing the error model of the tri-axial gyroscope, the principle of calibration is proposed. Compared with other algorithms, numerical simulations are performed to evaluate the effectiveness of integral form of the cross product calibration method. Experiment on the hex-rotor unmanned aerial vehicle platform shows that the proposed method has great advantages in low-cost integrated navigation system.

Study on Fault Diagnosis of Planetary Gearbox in Unmanned Aerial Vehicle Using Multi sensor Data

2020 ◽  
Vol 20 (4) ◽  
pp. 332-342
Author(s):  
Hyung Jun Park ◽  
Seong Hee Cho ◽  
Kyung-Hwan Jang ◽  
Jin-Woon Seol ◽  
Byung-Gi Kwon ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Unmanned Aerial Vehicle ◽  
Sensor Data ◽  
Planetary Gearbox ◽  
Aerial Vehicle

Results of Spatial Structure of Atmosphere Radiation in a Spectral Range (1.5–2) µm Research

2018 ◽  
pp. 7-13
Author(s):  
Anton M. Mishchenko ◽  
Sergei S. Rachkovsky ◽  
Vladimir A. Smolin ◽  
Igor V . Yakimenko
Keyword(s):  
Spatial Structure ◽  
Unmanned Aerial Vehicle ◽  
Wavelength Range ◽  
Spectral Range ◽  
Near Ir ◽  
Optoelectronic Systems ◽  
Aerial Vehicle

Results of experimental studying radiation spatial structure of atmosphere background nonuniformities and of an unmanned aerial vehicle being the detection object are presented. The question on a possibility of its detection using optoelectronic systems against the background of a cloudy field in the near IR wavelength range is also considered.

Positioning the Angle of Attack Sensor on an Unmanned Aerial Vehicle Wing

2016 ◽  
Vol 3 (1) ◽  
pp. 25-33
Author(s):  
Amir Birjandi ◽  
◽  
Valentin Guerry ◽  
Eric Bibeau ◽  
Hamidreza Bolandhemmat ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Angle Of Attack ◽  
Aerial Vehicle
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