Perspectives on the Use of Unmanned Aerial Vehicle Systems as Tools for Small‐Scale Fisheries Research and Management

Fisheries ◽  
2021 ◽  
Author(s):  
José Amorim Reis‐Filho ◽  
Tommaso Giarrizzo
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Small Scale ◽  
Small Scale Fisheries ◽  
Vehicle Systems ◽  
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.

Miniaturized ultra‐wideband printed dipole array for electronic warfare applications in unmanned aerial vehicle systems

2020 ◽  
Vol 62 (11) ◽  
pp. 3601-3610
Author(s):  
A. N. Meena Kumari ◽  
Suma Varughese ◽  
P. Venkatesh Rao
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Ultra Wideband ◽  
Electronic Warfare ◽  
Vehicle Systems ◽  
Aerial Vehicle

Performance Analysis in Object Diameter Estimation based on Single and Multiple Non-Destructive and Discrete Infrared Sensors

2014 ◽  
Vol 67 (1) ◽  
Author(s):  
Norashikin M. Thamrin ◽  
Norhashim Mohd. Arshad ◽  
Ramli Adnan ◽  
Rosidah Sam ◽  
Noorfazdli Abd. Razak ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Laser Scanning ◽  
Pass Rate ◽  
Small Scale ◽  
Infrared Sensors ◽  
Scanning Method ◽  
Average Percentage ◽  
Multiple Sensors ◽  
Localization And Mapping ◽  
Aerial Vehicle

In Simultaneous Localization and Mapping (SLAM) technique, recognizing and marking the landmarks in the environment is very important. Therefore, in a commercial farm, rows of trees, borderline of rows as well as the trees and other features are mostly used by the researchers in realizing the automation process in this field. In this paper, the detection of the tree based on its diameter is focused. There are few techniques available in determining the size of the tree trunk inclusive of the laser scanning method as well as image-based measurements. However, those techniques require heavy computations and equipments which become constraints in a lightweight unmanned aerial vehicle implementation. Therefore, in this paper, the detection of an object by using a single and multiple infrared sensors on a non-stationary automated vehicle platform is discussed. The experiments were executed on different size of objects in order to investigate the effectiveness of this proposed method. This work is initially tested on the ground, based in the lab environment by using an omni directional vehicle which later will be adapted on a small-scale unmanned aerial vehicle implementation for tree diameter estimation in the agriculture farm.  In the current study, comparing multiple sensors with single sensor orientation showed that the average percentage of the pass rate in the pole recognition for the former is relatively more accurate than the latter with 93.2 percent and 74.2 percent, respectively. 

Deconfliction in High-Density Unmanned Aerial Vehicle Systems

2019 ◽  
Vol 27 (2) ◽  
pp. 61-69 ◽  
Author(s):  
Timothy B. Nysetvold ◽  
John L. Salmon
Keyword(s):  
Unmanned Aerial Vehicle ◽  
High Density ◽  
Vehicle Systems ◽  
Aerial Vehicle

Multi-Unmanned Aerial Vehicle Systems Control via Flexible Levels of Interaction: An Adaptable Operator-Automation Interface Concept Demonstration

2013 ◽  
Author(s):  
Mark Draper ◽  
Christopher A. Miller ◽  
J. Benton ◽  
Gloria L. Calhoun ◽  
Heath Ruff ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Vehicle Systems ◽  
Aerial Vehicle ◽  
Systems Control

Designing an Unmanned Aerial Vehicle for Specific Aerial Applications of Insecticides and Herbicides

2016 ◽  
Author(s):  
Mohammed S. Mayeed ◽  
Gabriel Darveau
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Lift Force ◽  
State Of The Art ◽  
Low Cost ◽  
Von Mises Stress ◽  
Small Scale ◽  
Aerial Application ◽  
Bottom Line ◽  
Flight Duration ◽  
Aerial Vehicle

In this study a gasoline powered hexa-copter unmanned aerial vehicle (UAV) has been designed as a solution to farmers’ need for a low cost, easy to maintain, long flight duration, and multi-purpose means of specific aerial applications for insecticides and herbicides. Application of herbicides and pesticides by airplane is an example of how farmers have used technology to improve their bottom line and overall quality of life. Fields can now be sprayed in under an hour instead of consuming an entire day. However, if a producer has noxious weeds in only a small area, fixed-wing aerial application cannot be used as it is only accurate enough to do an entire field. Currently there is no solution for small scale, accurate, aerial herbicide application to meet this need. The currently available Yamaha Rmax UAV costs a tremendous amount of money and also requires a lot of money to maintain. Though it may be useful in large scale aerial spraying on the farm land, it would not be used in targeted specific areas as it is not efficient in specific applications. The gasoline powered hexacopter UAV designed in this study is a low cost solution to farmers’ need for specific aerial applications of insecticides and herbicides. The UAV design can carry 2–3 gallons of herbicide (16.7–25.0 lbs.) for a flight time of more than 30 minutes without refueling. The design could be transported in a 60.3in × 56.7in pickup bed. Structural and fatigue analyses are performed on the complete structure using state of the art software SolidWorks Simulation. The minimum factor of safety is obtained to be 10 based on maximum von Mises stress failure criteria. Under normal conditions with an estimated commercial use of 100 cycles per day it is observed that the design would survive for about 13 years without any fatigue failure. A drop test analysis is performed to ensure the design can survive a 5 feet freefall and a frequency analysis is also performed to observe the critical natural frequency of the structure. Flow simulations are performed on the 6 propellers/blades model using state of the art software SolidWorks Flow Simulation to observe the effect of vorticity interactions on the lift force. The design has been reasonably optimized based on maximizing the lift force. With this new UAV design small scale and substantial farmers could afford a personal UAV for aerial applications with a small amount of capital whose absence hindered efficient and effective specific aerial application for many years.

Manufacture of an Unmanned Aerial Vehicle (UAV) for Advanced Project Design Using 3D Printing Technology

2013 ◽  
Vol 397-400 ◽  
pp. 970-980 ◽  
Author(s):  
Noor A. Ahmed ◽  
J.R. Page
Keyword(s):  
3D Printing ◽  
Unmanned Aerial Vehicle ◽  
Three Dimensional ◽  
Small Scale ◽  
Project Design ◽  
Test Model ◽  
Printing Technology ◽  
Three Dimensional Printing ◽  
Aerial Vehicle ◽  
Dimensional Printing

The phenomenal growth in three-dimensional printing technology has the potential of ushering in the next wave of industrial revolution. As part of an advanced project design conducted at the Aerospace Engineering of the University of New South, the concept of a printable unmanned aerial vehicle was explored. A subsequent small scale test model was manufactured using three-dimensional printing technology for wind tunnel testing and validation. The exercise demonstrates the huge potential of such printing technology in future aircraft designs.Key words: 3D printing, design, manufacture, UAV

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