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Paper Abstract and Keywords
Presentation 2018-05-31 09:20
Estimation of High-Voltage Powerline Detection Performance in Rainfall Conditions by 76 GHz Helicopter Obstacle Detection Millimeter-Wave Radar System
Kazuyuki Morioka, Norihiko Miyazaki, Shunichi Futatsumori (ENRI)
Abstract (in Japanese) (See Japanese page) 
(in English) We have been developing a small transmitting power 76 GHz millimeter-wave radar system for helicopter obstacle detection. The purpose of the on-board radar is to detect and avoid obstacles such as high-voltage power lines and pylons that may affect flight safety. This paper studies the detection performance of the 76 GHz millimeter-wave radar system in rainfall conditions. We discuss the capability of our helicopter obstacle detection system during bad weather conditions. First, we show estimated rain attenuations in 76 GHz based on ITU-R document. Second, we discuss the detection performance of the 76 GHz millimeter-wave radar system in several rain conditions. From the results, we can see that the estimated maximum detection range for 0.25 mm/h (Drizzle), 2.5 mm/h (Light rain) and 5.0 mm/h (Medium rain) are 2300 m, 1950 m, and1700 m, respectively. As helicopters are operated with visual flight rules (VFR), this radar system is practically used under drizzle or light rain conditions only. Therefore, our fabricated millimeter-wave radar system has about 2 km detection range in the practical conditions. Finally, we show the estimated radar plan position indicator (PPI) scope based on field experiment data. While there are many reflections visible from terrestrial objects, such as trees and buildings, the positions of the power pylons and lines are visible even in medium rain conditions at 840 m.
Keyword (in Japanese) (See Japanese page) 
(in English) Millimeter-Wave Radar System / Helicopter Obstacle Detection System / Rain Attenuation / / / / /  
Reference Info. IEICE Tech. Rep.
Paper #  
Date of Issue  
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee AP  
Conference Date 2018-05-30 - 2018-05-31 
Place (in Japanese) (See Japanese page) 
Place (in English) The University of Da nang, University of Science and Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 2018 Vietnam-Japan International Symposium on Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2018-05-AP 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Estimation of High-Voltage Powerline Detection Performance in Rainfall Conditions by 76 GHz Helicopter Obstacle Detection Millimeter-Wave Radar System 
Sub Title (in English)  
Keyword(1) Millimeter-Wave Radar System  
Keyword(2) Helicopter Obstacle Detection System  
Keyword(3) Rain Attenuation  
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1st Author's Name Kazuyuki Morioka  
1st Author's Affiliation Electronic Navigation Research Institute (ENRI)
2nd Author's Name Norihiko Miyazaki  
2nd Author's Affiliation Electronic Navigation Research Institute (ENRI)
3rd Author's Name Shunichi Futatsumori  
3rd Author's Affiliation Electronic Navigation Research Institute (ENRI)
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Speaker
Date Time 2018-05-31 09:20:00 
Presentation Time 20 
Registration for AP 
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