In order to guarantee reliability of the environmental testing on defense systems, it is important to use test equipment that meets requirements of the related test standards. Especially with regard to the rain test method in MIL-STD-810G w/change 1, the latest standard, it has been highly needed to introduce a novel technique and system to provide droplet- size and precipitation-rate conditions. In this study, droplet-diameter spectra of various nozzles were measured by a high-speed camera. Then, a pair of nozzles were selected based on the experimental results showing the spectra lie within the range from 0.5 mm to 4.5 mm, as suggested in the rain test method. Also, the flow-precipitation rate calibration system was developed to precisely correlate the precipitation rate measured in the chamber and the flow rate into the nozzle bank. In conclusion, the rain test equipment has been successfully developed fulfilling the requirements of the test standard.
목차
Abstract 1. 서론 2. 초고속 카메라를 이용한 물방울 광학계측 2.1 물방울 낙하현상 광학계측 기법 2.2 노즐 크기별 물방울 크기 측정 및 분석 3. 강우량-유량 보정시스템 개발 3.1 펌프 인버터 운전 주파수를 통한 유량 제어 3.2 강우량-유량 보정기법 개발 4. 강우시험기 개발 결과 5. 결론 References
키워드
Rain test equipment(강우시험기)High-speed camera(초고속 카메라)Precipitation(강우량)Flowrate(유량)Droplet size(물방울 크기)Environmental test(환경시험)
저자
강태엽 [ Tae-Yeob Kang | Member, The 8th R & D Institute, Agency for Defense Development ]
Corresponding Author