• 제목/요약/키워드: Profilometer

검색결과 143건 처리시간 0.033초

비포장 시험로의 노면 굴곡 측정 및 가혹도 분석을 위한 노면굴곡측정장비 개발 (Development of Profilometer for Profile Measurement and Severity Analysis of Unpaved Test Courses)

  • 양진생;구상화;배철훈;이상호
    • 한국정밀공학회지
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    • 제24권1호
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    • pp.37-46
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    • 2007
  • The vibration environment essentially companied by vehicle operation on the ground is determined by the shape of road surface, which is called profile. This paper focuses on development of a profile and severity measurement system for unpaved test courses. In general, the profile and severity of unpaved road is an important issue in the reliability of endurance test. In order to measure unpaved road profile and severity, it is necessary to develop a profilometer system. The developed profilometer system is composed of data processing computer, power unit, air compressor and sensors(encoder, vertical gyro and laser displacement) This paper presents the measuring system configuration, measurement principle of road profile and analysis method of road characteristics used at CPG(Changwon Proving Ground) for this purpose.

스윙암 방식의 형상 측정기를 이용한 대형 반사경의 정밀가공에 관한 연구 (Study on Fabrication of a Large Concave Mirror Surface Using a Swing-Arm Type Profilometer)

  • 이기암;김옥현;이응석
    • 한국기계가공학회지
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    • 제7권3호
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    • pp.41-46
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    • 2008
  • Generally optical components are fabricated by grinding, lapping and polishing processes. Those processes take long time to obtain optical high surface quality. In the case of large optical components, the on-machine measurement is strongly recommended because the workpiece is fragile and difficult to set up for fabricating and measuring. This paper is concerned about a swing-arm mechanism which can be used for on-machine measurement of a surface profile with a sensing probe end-effect, and also for grinding or lapping the surface with a corresponding tool. The measuring accuracy and uncertainty using a swing arm type profilometer have been studied. The experimental results show that this method is useful specially in lapping process with the accuracy of $5{\mu}m$. Those inspection data are provided for correcting the residual figuring error in next processes.

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표면미세형상측정을 위한 접촉식 형상측정기의 오차 보정 (An Error Compensation in Rough Surface Measurement by Contact Stylus Profilometer)

  • 조남규
    • 한국생산제조학회지
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    • 제8권1호
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    • pp.126-134
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    • 1999
  • In this paper, a new error compensating technique for form-error compensation of rough-surface profile obtained by contact stylus profilometer is proposed. By the method, the real contact points of rough-surface and diamond stylus can be estimated and the measured profile data corrected. To verify the compensation effect, the properties(Ra, RMS, Kurtosis, Skewness) of measured profile data and compensated data were compared. And, the cumulative RMS slope was proposed to assess the compensated effect of upper area of profile. The results show that the measuring error could be compensated very well in amplitude parameters and in proposed cumulative RMS slope by the developed form-error compensating technique.

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비포장 노면의 가혹도 관리에 관한 연구 (A Study on the Severity Control of Unpaved Test Courses)

  • 양진생;구상화;이정환;강도경;이상호
    • 한국정밀공학회지
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    • 제24권2호
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    • pp.47-57
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    • 2007
  • The vibration environment essentially companied by vehicle operation on the road is determined by the shape of road surface, which is called profile. In general, the profile and severity of unpaved road is an important issue in the reliability of durability test for vehicles. In order to maintain severity of unpaved road, it is necessary to develop profilometer system. We developed profilometer system which is composed of data processing computer, power unit, air compressor and sensors. This paper focuses on the severity management of unpaved test courses using neural networks. This paper presents the maintenance range for cross-country course in CPG(Chang-won Proving Ground) and the evaluation of similarity degree between unpaved roads.

레이저 평탄성장비를 사용한 공항활주로 종단 평탄성지수 측정개선에 관한 연구(I) (The study on the improvement of measuring longitudinal roughness index for airport runway using a laser profilometer)

  • 박기순;손형호;전현욱
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1998년도 가을 학술발표대회 논문집(III)
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    • pp.755-760
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    • 1998
  • This study was performed to improve the evaluation of the longitudinal roughness index for various profilometers at airport runway. Especially, a laser type of profilemeter subjected to the longitudinal roughness index has been focused. The test result show that a new type of profile index, IRI(International roughness index) resulted from a laser type of profilometer was profitable for airport runway etc.. The present study provides useful results for the improvement of evaluation of the conventional profile index.

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원통 축 방향의 표면거칠기 측정을 위한 시료의 자세 보정 (Orientation Correction of a Cylinder for Surface-Profile Measurement)

  • 조남규
    • 한국생산제조학회지
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    • 제5권4호
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    • pp.108-120
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    • 1996
  • A new technique and theory are proposed which correct orientation of a cylinder to perform a reliable measurement of the surface profile. We analyze characteristics of machined surfaces, e.g., ground, lapped and turned surfaces. Based upon the results. the optimum correction technique is derived by the statistical method. To verify the techinques, measurements are carried out by using the contact stylus profilometer on a controllable table. The measurement shows that surface information of cylinders can be acquired with high accuracy.

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초고속 카메라와 삼차원 표면 측정기를 이용한 삭마 재료의 정량적 표면 침식 분석 (Quantitative Analysis for Surface Recession of Ablative Materials Using High-speed Camera and 3D Profilometer)

  • 최화영;노경욱;천재희;신의섭
    • 한국항공우주학회지
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    • 제46권9호
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    • pp.735-741
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    • 2018
  • 본 논문에서는 초고속 카메라와 삼차원 표면 측정기를 이용하여 삭마 재료의 표면 침식량을 정량적으로 분석하였다. 대기권 재진입 환경을 모사하기 위해 0.4 MW 아크 가열 풍동을 이용하여 흑연과 탄소/페놀릭 복합재료의 삭마 실험을 수행하였다. 초고속 카메라를 이용하여 실시간 삭마 실험 영상을 획득하고, 이를 분석하여 침식량과 침식률을 산출하였다. 또한, 삼차원 표면 측정기를 이용하여 삭마 전후 시편의 표면 형상을 측정하였으며, 시편의 높이 차이로부터 침식량 분포를 정밀하게 산출하였다. 이를 통해 표면 침식 현상을 종합 분석하는데 있어서 두 측정 결과를 상호 보완하는 것이 유효함을 확인하였다.

촉침에 의한 표면 거칠기 측정 오차 해석 (Analysis of Measuring Error of Surface Roughness by Contact Stylus Profilometer)

  • 조남규;권기환
    • 한국정밀공학회지
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    • 제16권12호
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    • pp.174-181
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    • 1999
  • This paper describes the effect of the stylus tip size on the shape error in surface topography measurement. To analyze the distortional effect of an actual surface geometry origination from the finite stylus size, the surface is modeled as a sinusoid and the stylus tip as a circle. The magnitude of this distortion is defined as the ration of standard deviation, and this is expressed as an analytic function of the stylus tip radius and the geometrical parameter of a sinusoid. In this paper, the spectrum analysis of the profile is applied to investigate the distortional effect due to the mechanical filtering of the stylus in the frequency domain. and, the cumulative power spectrum is proposed to assess the shape error of measured data according to the various stylus tip sizes. From these results, a new method to select proper stylus tip radius is proposed.

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