• 제목/요약/키워드: Sheargoraphy

검색결과 2건 처리시간 0.018초

전단간섭계를 이용한 압력용기 내부 결함 측정시 전단량 변화에 따른 오차분석 (Analysis of Error Rate in the Variations of Shearing Amount in Measuring the Internal Defect using a Shearography)

  • 홍경민;강영준;최인영;안용진;윤석범
    • 한국생산제조학회지
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    • 제21권5호
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    • pp.726-732
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    • 2012
  • Pipe and Pressure Vessels that is used in power plant and chemical industry have many Internal Defects that is corrosion caused by the flow of fluid. These Internal Defects that have possibility of explosion are very dangerous because it can not see from the outside. This days many companys using NDT method to find an Internal Defect. Most of the NDT methods have limitations that are constraint of shape and materials. But Sheargoraphy have many advantages compared conventional NDT method. It has very fast measuring speed, non-destructive and non contacting measurement. As well as it hasn't constraint of shape and materials. As a paper on the analysis of measurement of error, the important factors were the Shearing Amount and pressure, and discovered measurement of the Internal Defect of the object by using shearography. The optimal Shearing Amount and pressure was discovered and utilized.

전단간섭계를 이용한 내부 결함의 면외 변위 측정을 위한 화상처리 알고리즘 개선에 관한 연구 (Study of Development of Image Processing Algorithm for Measurement of Out of Plane Deformation Using the Shearography)

  • 최인영;강영준;홍경민;김성종;박종현
    • 한국정밀공학회지
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    • 제30권1호
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    • pp.59-66
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    • 2013
  • The measuring of internal defects of objects using the shearography has many advantages. It is a non-contact and non-destructive method and It has a real time measurement speed and no constraints of object shape. Compared to ESPI(Electronic Speckle Pattern Interferometry), Shearography has a very low error rate by vibration and air turbulence. So shearography provides possibilities of industrial application. In this paper, Image processing algorithm that is measurement of out-of-plane deformation using the shearography is proposed by developed using the LabVIEW 2010 and measurement result of out-of-plane ESPI and Shearography are compared quantitatively.