http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Development of a micro-vibration isolation system for digital image capturing
Nguyen Vu Doan(도언유엔뷰),Young Hun Ko(고영훈),Seung Hwan Seo(서승환),Moon Kyung Chung(정문경),Nam Seo Goo(구남서) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Nowadays, monitoring and analyzing the properties and dynamic characteristics of aging aerospace or civil structures such as aircrafts, bridges, and buildings are essential to verify structural integrity. Beside convential method straingage, improvement in camera technology, image-processing algorithms have made advanced non-contact full-field measurement technique such as Digital Image Correlation (DIC) appealing method for Non-destructive Evaluation (NDE) and Structural Health Monitoring (SHM). With increasing demands for better image quality and noise reduction from external sources, the stability requirements of camera systems during working are becoming more rigorous. Therefore, a method to design and optimize vibration isolation system was developed. This study presents the engineering analysis and testing of a low-cost vibration isolator specifically aimed at vertical high-frequency motion. The device works on the principle of displacement transmissibility reduction via the use of wave spring and specially designed brackets. The base featured a threaded aperture to allow leveling adjustment of the platform. The isolator is fixed on an electromechanical shaker and excited by swept-sine signal from 0 to 100Hz with small sweep rate. The vibration of isolator was then measured by two laser sensors to obtain the transmissibility curve during its operating. As a result, the isolator filters out a broad band of input vibration frequencies and ensures a constant level of vibration transmission reduction on vertical direction.