Highly sensitive and wide-detection range pressure sensor constructed on a hierarchical-structured conductive fabric as a human–machine interface

Nanoscale ◽  
2020 ◽  
Vol 12 (41) ◽  
pp. 21271-21279
Author(s):  
Tao Chen ◽  
Shao-Hui Zhang ◽  
Qi-Hang Lin ◽  
Ming-Jiong Wang ◽  
Zhan Yang ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Pressure Sensor ◽  
Human Machine Interface ◽  
Detection Range ◽  
Conductive Fabric ◽  
Highly Sensitive ◽  
Aerial Vehicle ◽  
Machine Interface ◽  
Wearable Interface

A novel hierarchical conductive fabric-based wearable interface is proposed to control the motion of an unmanned aerial vehicle.

scholarly journals Synthesis of algorithm of unmanned aerial vehicle detection by acoustic noise

Doklady BGUIR ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 65-73
Author(s):  
A. D. Puzanau ◽  
D. S. Nefedov
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Acoustic Noise ◽  
Signal To Noise Ratio ◽  
Weather Conditions ◽  
Wind Noise ◽  
Detection Range ◽  
Detection Systems ◽  
A Value ◽  
Coherent Accumulation ◽  
Aerial Vehicle

 The algorithm of detection of acoustic noise provided by an unmanned aerial vehicle (UAV) in the noise background due to wind is synthesized in the article. Creation of the algorithm has been carried out using the Neyman – Pearson lemma. The algorithm assumes a combination of the stages of wind noise coherent compensation and coherent accumulation of UAV’s acoustic noise sound pressure impulses. The coherent accumulation time matches doubled time of fluctuation correlation resulted by experimental research of acoustic noise of different types of  UAVs. Efficiency of the developed algorithm of UAV detection depends on flight velocity, foreshortening, amount of blades and rotor turnovers of UAV as well as weather conditions. For the probability of a false alarm value of 10–4, the probability of correct UAV detection value of 0.9 is provided wherein signal-to-noise ratio has a value of 8 dB. These indicators correspond the detection range of 200 to 300 meters. The obtained results allow discussions about perspective of acoustic UAVs detection systems adaptation. 

scholarly journals A hierarchical vision-based localization of rotor unmanned aerial vehicles for autonomous landing

2018 ◽  
Vol 14 (9) ◽  
pp. 155014771880065 ◽  
Author(s):  
Haiwen Yuan ◽  
Changshi Xiao ◽  
Supu Xiu ◽  
Wenqiang Zhan ◽  
Zhenyi Ye ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Feature Detection ◽  
Field Experiments ◽  
Measurement Range ◽  
Autonomous Landing ◽  
Detection Range ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
Vision Based Localization

The vision-based localization of rotor unmanned aerial vehicles for autonomous landing is challenging because of the limited detection range. In this article, to extend the vision detection and measurement range, a hierarchical vision-based localization method is proposed for unmanned aerial vehicle autonomous landing. In such a hierarchical framework, the landing is defined into three phases: “Approaching,”“Adjustment,” and “Touchdown,” in which visual artificial features at different scales can be detected from the designed object pattern for unmanned aerial vehicle pose recovery. The corresponding feature detection and pose estimation algorithms are also presented. In the end, typical simulation and field experiments have been carried out to illustrate the proposed method. The results show that our hierarchical vision-based localization has the ability to a consecutive unmanned aerial vehicle localization in a wider working range from far to near, which is significant for autonomous landing.

scholarly journals How Much Space Is Required? Effect of Distance, Content, and Color on External Human–Machine Interface Size

Information ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 346 ◽  
Author(s):  
Michael Rettenmaier ◽  
Jonas Schulze ◽  
Klaus Bengler
Keyword(s):  
Repeated Measures ◽  
Human Machine Interface ◽  
Human Detection ◽  
Human Interaction ◽  
Minimum Size ◽  
Detection Range ◽  
Content Type ◽  
Repeated Measures Design ◽  
Road Users ◽  
Machine Interface

The communication of an automated vehicle (AV) with human road users can be realized by means of an external human–machine interface (eHMI), such as displays mounted on the AV’s surface. For this purpose, the amount of time needed for a human interaction partner to perceive the AV’s message and to act accordingly has to be taken into account. Any message displayed by an AV must satisfy minimum size requirements based on the dynamics of the road traffic and the time required by the human. This paper examines the size requirements of displayed text or symbols for ensuring the legibility of a message. Based on the limitations of available package space in current vehicle models and the ergonomic requirements of the interface design, an eHMI prototype was developed. A study involving 30 participants varied the content type (text and symbols) and content color (white, red, green) in a repeated measures design. We investigated the influence of content type on content size to ensure legibility from a constant distance. We also analyzed the influence of content type and content color on the human detection range. The results show that, at a fixed distance, text has to be larger than symbols in order to maintain legibility. Moreover, symbols can be discerned from a greater distance than text. Color had no content overlapping effect on the human detection range. In order to ensure the maximum possible detection range among human road users, an AV should display symbols rather than text. Additionally, the symbols could be color-coded for better message comprehension without affecting the human detection range.

scholarly journals Optimized Stealth Design and Remolding of Target Unmanned Aerial Vehicle

2020 ◽  
Vol 38 (2) ◽  
pp. 246-252
Author(s):  
Yang Mu ◽  
Hao Li ◽  
Zhen Wang ◽  
Yi Miao ◽  
Shichang Duan
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Flight Test ◽  
Airborne Radar ◽  
Intensity Level ◽  
Detection Range ◽  
Test And Evaluation ◽  
Current Test ◽  
Aerial Vehicle ◽  
Microwave Absorbing ◽  
Electric Loss

In order to satisfy the imperious requirements of low-detectable target aircraft in the current test and evaluation of airborne radar and to remedy the numerous defects of magnetic microwave absorbing coating in the practical application, a new type of light-weight electric loss coating with the carbon nanotubes(CNTs) was proposed by the optimal design of the absorbent content and coating thickness. A type of target unmanned aerial vehicle(UAV) with representative non-stealth structure was remolded by the present type of coating, and the detection range of airborne radar to the remolded UAV was obtained in the flight test. The results reveal that the microwave absorbing coating with a thickness of 2.5mm has the optimized microwave absorbing properties at a CNTs content of 15wt.%, and the reflection loss value can be inferior to -8dB over the whole X band. The intensity level of scattering center of the UAV degrades after coated, and the radar cross section (RCS) of coated UAV decreases by 20dB in the flight test.

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