• Title/Summary/Keyword: 3차원 정밀측정

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Photogrammetry 기법을 활용한 MSC 설치면의 정밀 측정

  • Woo, Sung-Hyun;Kim, Hong-Bae;Moon, Sang-Mu;Im, Jong-Min
    • Aerospace Engineering and Technology
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    • v.3 no.1
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    • pp.126-133
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    • 2004

  • Photogrammetry, as its name implies, is a 3-dimensional coordinate measuring technique that uses photographs as the fundamental medium for metrology. In the last few years the accuracy of photogrammetry has increased dramatically thanks to the rapid advance of digital camera manufacturing technique. This paper discusses photogrammetric measurement of the interface surface of MSC(Multi-Spectral Camera), which is a main payload of KOMPSAT-2. Total 24 paper targets on the objective surfaces and two scale bars calibrated with high accuracy were used for measurement, and multiple images were taken from 11 different camera angles by using a spacecraft rotation dolly. As a result of analysis, 3D coordinates of each targeted point were obtained and the flatness value based on the selected reference plane was calculated and compared with the pre-determined requirement. The technique acquired by this study is expected to be used for the 3D precise measurement of ultra-light weight and inflatable space structures such as a satellite antenna and a solar array.

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Scanning Probe를 이용한 OMM(On the Machine Measuring) 시스템 개발 및 평가

  • 김선호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.04a
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    • pp.227-231
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    • 1996

  • 기계가공 생산시스템에서 대량생산라인의 경우에는 측정 및 검사공정을 별도로 두고 있으나, 금형과 같은 다품종 소량 생산품의 경우에는 이러한 방식이 적합하지않다. 이러한 경우에는 유연성이 높은 3차원 측정기(CMM)를 설치하여 운용하고 있으나 운용비용이 많이 들고 관리하기가 쉽지 않으며 Setup 및 측정시간이 길어져 비경제적일 수가 있다. 또한 3차원 측정기의 한정된 크기때문에 대형가공물이라든지 탈착이 어려운 생산품의 경우에는 마땅한 특정 방법이 없는 실정이다. 본 연구에서는 개발된 OMM 시스템을 3종류의 TV Shadow Mask 금형의 측정에 적용한 결과를 소개한다. 측정된 결과는 CMM을 이용해 측정한 결과와 비교 했고, 비교된 결과를 이용해 개발된 시스템의 반복정밀도, 측정 정확도를 통계적 방법으로그리고 경제적 관점에서 CMM을 이용 한 기존의 방법과 개발된 시스템을 비교 평가했다.

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Range Alignment Measurement for Satellite Antenna by Using Theodolite System (데오드라이트 시스템을 이용한 위성 안테나 레인지 얼라인먼트 측정)

  • Park, Hong-Cheol;Son, Yeong-Seon;Yun, Yong-Sik
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.32 no.6
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    • pp.134-141
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    • 2004

  • The three-dimensional precision measurement technology for industrial product of middle and/or large scale has been developed. Theodolite measurement system which is one of the technology is widely used in aerospace industry. This paper describes a range alignment method of parabolic antenna to RF probe in the near field range by using the theodolite system, The range alignments of the Ku-band and Ka-band antennas have been accomplished within the requirements, ${\pm}1mm\;and\;{\pm}0.05^{\circ}$.

  • https://doi.org/10.5139/JKSAS.2004.32.6.134 인용 PDF KSCI