scholarly journals Object Detection by Monocular Camera and Laser Sensors for Small Unmanned Aerial Vehicle

2019 ◽  
pp. 18-25
Author(s):  
Peter Dzurovčin ◽  
Libor Švadlenka ◽  
Milan Džunda ◽  
Iveta Vajdová ◽  
Jozef Galanda
Keyword(s):  
Object Detection ◽  
Unmanned Aerial Vehicle ◽  
Load Capacity ◽  
Minimum Weight ◽  
Unmanned Vehicles ◽  
Energy Sources ◽  
Laser Sensors ◽  
Harris Detector ◽  
Aerial Vehicle ◽  
Set Up

In this paper, we present selected options for detection and avoidance of obstacles by small unmanned vehicles. The solution to this problem is very complicated mainly because UAVs have a limited load capacity as well as energy sources. Sensors that can be used to solve this task must meet the minimum weight and power requirements. We decided to use a stereo camera and a laser because of the requirements that we set up earlier. The size of the obstacle is determined by the SURF algorithm and the Harris detector.

A Review on Unmanned Aerial Vehicle Energy Sources and Management

2021 ◽  
pp. 181-204
Author(s):  
Ibrahim Abdullahi Shehu ◽  
Musa Mohammed ◽  
Sulaiman Haruna Sulaiman ◽  
Abubakar Abdulkarim ◽  
Ahmad Bala Alhassan
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Energy Sources ◽  
Aerial Vehicle

scholarly journals UAV-YOLO: Small Object Detection on Unmanned Aerial Vehicle Perspective

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2238 ◽  
Author(s):  
Mingjie Liu ◽  
Xianhao Wang ◽  
Anjian Zhou ◽  
Xiuyuan Fu ◽  
Yiwei Ma ◽  
...  
Keyword(s):  
Object Detection ◽  
Unmanned Aerial Vehicle ◽  
Spatial Information ◽  
Detection Method ◽  
Small Scale ◽  
Small Object ◽  
Aerial Vehicle ◽  
Public Dataset ◽  
Small Object Detection ◽  
Level Performance

Object detection, as a fundamental task in computer vision, has been developed enormously, but is still challenging work, especially for Unmanned Aerial Vehicle (UAV) perspective due to small scale of the target. In this study, the authors develop a special detection method for small objects in UAV perspective. Based on YOLOv3, the Resblock in darknet is first optimized by concatenating two ResNet units that have the same width and height. Then, the entire darknet structure is improved by increasing convolution operation at an early layer to enrich spatial information. Both these two optimizations can enlarge the receptive filed. Furthermore, UAV-viewed dataset is collected to UAV perspective or small object detection. An optimized training method is also proposed based on collected UAV-viewed dataset. The experimental results on public dataset and our collected UAV-viewed dataset show distinct performance improvement on small object detection with keeping the same level performance on normal dataset, which means our proposed method adapts to different kinds of conditions.

Investigation of wind and sound field characteristics of multi-rotor unmanned aerial vehicle

2020 ◽  
Vol 51 (7-9) ◽  
pp. 158-163
Author(s):  
Huiru Cao ◽  
Haixiu Cheng ◽  
Wenjian Zhu
Keyword(s):  
Linear Relationship ◽  
Unmanned Aerial Vehicle ◽  
Wind Field ◽  
Sound Field ◽  
Sound Intensity ◽  
Experimental Platform ◽  
Distance Range ◽  
Aerial Vehicle ◽  
Set Up ◽  
Wind Intensity

Wind field and sound field characteristics are the key indexes for unmanned aerial vehicle. Therefore, in this study, the wind field and sound field characteristics of a quad-rotor unmanned aerial vehicle are investigated. First, the experimental platform was set up based on quad-rotor unmanned aerial vehicle. Second, the experiments were performed on the wind field and the sound field characteristics of the unmanned aerial vehicle at different working currents. Then, the experiment results were analysed. Meanwhile, the experimental results showed that the working current has a large impact on the wind field and the wind intensity increases as working current increases; as the working current increases, the sound field is enhanced and a linear relationship exists; within a certain distance range of the unmanned aerial vehicle, as distance increases, sound intensity dramatically decreases. The presented methods and results can not only be used to evaluate the performance of the electric multi-rotor unmanned aerial vehicle but also provide references for the further improvement of the performance of the unmanned aerial vehicle.

scholarly journals Challenges Caused by the Unmanned Aerial Vehicle in the Air Traffic Management

2017 ◽  
Vol 47 (2) ◽  
pp. 96-105 ◽  
Author(s):  
Zsolt Sándor
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Traffic Control ◽  
Traffic Management ◽  
Unmanned Vehicles ◽  
Air Traffic ◽  
Aviation Industry ◽  
Operational Environment ◽  
Flight Operations ◽  
Aerial Vehicle ◽  
Operational Issues

The increasing number of unmanned aerial vehicle poses new challenges in the aviation industry especially the air traffic control, which is responsible for the safe flight operations in the controlled airspaces. In order to protect the conventional aircraft a new operation environment has to be created, which guarantee the safe flying and the possibility of the fulfilment of the flight. In the article drone related safety and operational problems are highlighted. All issue connected to the coexistence of manned and unmanned aircrafts are critical, thus their management have significant importance.Spread and wide use of unmanned aerial vehicle traffic management systems (UTM) can manage the critical operational issues, but is has to be defined that what is the problem, what is the scope, what is the operational environment. Services and functions related to the operation of the UTM system are defined, which are necessary for the safe flying fulfilled by the unmanned vehicles.

scholarly journals Object Detection Technique for Small Unmanned Aerial Vehicle

2017 ◽  
Vol 260 ◽  
pp. 012040 ◽  
Author(s):  
M. Faiz Bin Ramli ◽  
Ari Legowo ◽  
Syariful Syafiq Shamsudin
Keyword(s):  
Object Detection ◽  
Unmanned Aerial Vehicle ◽  
Detection Technique ◽  
Aerial Vehicle

scholarly journals The Prospect for the Launche of a Mini Unmanned Aerial Vehicle from an Unmanned Surface Vehicle

2018 ◽  
Vol 212 (1) ◽  
pp. 5-26
Author(s):  
Karolina Jurczyk
Keyword(s):  
Computer Simulation ◽  
Unmanned Aerial Vehicle ◽  
Unmanned Vehicles ◽  
Unmanned Surface Vehicle ◽  
Aerial Vehicle

Abstract Due to the growing interest in the problems of cooperation among unmanned vehicles, in the article the proposition of the system for launching a mini unmanned aerial vehicle (mini-UAV) from an unmanned surface vehicle (USV) has been presented. The solution differs from the previously used in this that instead of the commonly used rotorcrafts it concerns the ability to start the mini aircraft with the help of pneumatic or rubber launcher. The results of the computer simulation have con-firmed the possibility of implementation of that kind of system.

scholarly journals Bio-inspired Autonomous Visual Vertical and Horizontal Control of a Quadrotor Unmanned Aerial Vehicle

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 184 ◽  
Author(s):  
Saul Armendariz ◽  
Victor Becerra ◽  
Nils Bausch
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Vestibular System ◽  
Reference Frames ◽  
Unmanned Vehicles ◽  
Moving Target ◽  
External Reference ◽  
Visual Vertical ◽  
Tau Theory ◽  
Aerial Vehicle ◽  
Ground Distance

Near-ground manoeuvres, such as landing, are key elements in unmanned aerial vehicle navigation. Traditionally, these manoeuvres have been done using external reference frames to measure or estimate the velocity and the height of the vehicle. Complex near-ground manoeuvres are performed by flying animals with ease. These animals perform these complex manoeuvres by exclusively using the information from their vision and vestibular system. In this paper, we use the Tau theory, a visual strategy that, is believed, is used by many animals to approach objects, as a solution for relative ground distance control for unmanned vehicles. In this paper, it is shown how this approach can be used to perform near-ground manoeuvres in a vertical and horizontal manner on a moving target without the knowledge of height and velocity of either the vehicle or the target. The proposed system is tested with simulations. Here, it is shown that, using the proposed methods, the vehicle is able to perform landing on a moving target, and also they enable the user to choose the dynamic characteristics of the approach.

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