• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2004년도 추계학술대회 논문집
• /
• pp.993-997
• /
• 2004

A data error inspection algorithm for wireless digital data communication was developed. Original data converted By wireless digital data error inspection algorithm. Wireless digital data is high possibility to get distortion and lose by noise and barrier on wireless. If the data check damaged and lost at receiver, can't make it clear and can't judge whether this data is right or not. Therefore, by wireless transmission data need the data error inspection algorithm in order to decrease the data distortion and lose and to monitoring the transmission data as real time. This study consists of RF station for wireless transmission, Water Level Meter station for water level measurement and Error inspection algorithm for error check of transmission data. This study is also that investigation and search for error inspection algorithm in order to wireless digital data transmission in condition of the least data's damage and lose. Designed transmitter and receiver with one - chip micro process to protect to swell the volume of circuit. Had designed RF transmitter - receiver station simply by means of ATMEL one - chip micro processing the systems. Used 10mW of the best RF power and 448MHz-449MHz on frequency band which is open to public touse free within the limited power.

• 한국구조물진단유지관리공학회 논문집
• /
• 제27권5호
• /
• pp.30-39
• /
• 2023

국가의 중요 방재시설인 대형 댐 시설물은 노후화와 홍수, 지진 등의 위험으로 디지털 전환 기술을 적용한 보다 나은 댐 안전점검 및 진단이 필수적이다. 종래의 인력에 의한 육안 안전점검 방식은 인력 접근의 어려움과 고소작업의 위험성, 노하우 중심의 점검에서 오는 데이터의 신뢰성 등의 문제가 있었다. 본 연구에서는 2개 대규모 댐 시설물을 대상으로 드론 photogrammetry에 의한 디지털 데이터 기반 댐 안전점검의 적용성을 검토하고, 지속적 활용을 위한 데이터 관리 방법론을 제시하였다. 댐 높이 42 m 및 99.9 m의 댐들에 대해 수면 및 전자기장 간섭, 심한 고저차에도 불구하고 평면적 더블그리드 및 수동 촬영 방식으로 GSD 2.5 cm/pixel 이내의 양호한 3D 디지털 모델을 생성하였다. 생성된 3D 메쉬 모델, 정사영상, 수치표면모형으로 as-built 조건의 종단 및 횡단 선형을 손쉽게 추출하여 댐의 변형 모니터링에 효과적임을 확인하였다. 댐 여수로 등 콘크리트 시설물에 대한 디지털 3D 모델로부터 균열 및 손상부를 효과적으로 검출하고 시각화하였으며, 이는 고소작업의 위험성 및 접근 제약 시설의 안전점검에 활용가능하다. 또한 댐의 안전점검 시 외관 조사망도를 3D 디지털 모델 상에서 매핑하는 방법과 손상 정보 이력 관리를 위한 관계형 데이터베이스 구조화 방안을 제안하였다. SYG댐 여수로 안전점검에 대한 투입 노동력과 시간을 실측한 결과, 드론 photogrammetry 방법은 기존 인력 육안점검에 비해 48%의 생산성 향상 효과를 확인하였다. 드론 photogrammetry 기반 댐 안전점검 디지털 전환은 업무의 생산성과 데이터 신뢰성 향상에 매우 효과적인 것으로 판단된다.

• Spatial Information Research
• /
• 제8권1호
• /
• pp.31-50
• /
• 2000

국가 GIS 구축사업의 일환으로 지형도를 비롯한 여러 가지 주제들이 수치지도로 구축되어왔다. 이렇게 구축된 수치지도는 사용하고자 하는 목적에 맞게 올바르게 구축되어 그 정확도를 신뢰할 수 있을 경우에만 효율적으로 사용될 수 있다. 본 연구의 목적은 양질의 수치지도를 구축하는데 필요한 합리적인 검수방안을 제시하는데 있다. 이를 위해 국내·외에서 요구되는 수치지도의 품질요소와 검수현황을 살펴보았고, 수치지도에서 발생하는 오류유형을 분석했다. 이러한 오류유형을 바탕으로 데이터생성연혁, 데이트포맷, 위치정확성, 속성정확성, 기하구조의 적합성, 논리적 일관성, 경계인접, 완전성, 도곽선 범위의 9가지 기존을 마련한 뒤 작업계획, 오류유형 정의, 납품내역검수, 육안중첩검수, 현지조사검수, 전산정밀검수, 자동검수, 검수결과판정, 검수결과해석으로 이어지는 9단계의 체계적인 다단계 검수절차를 제안하였다.

• 반도체디스플레이기술학회지
• /
• 제19권3호
• /
• pp.12-18
• /
• 2020

In semiconductor manufacturing, defect detection is critical to maintain high yield. Currently, computer vision systems used in semiconductor photo lithography still have adopt to digital image processing algorithm, which often occur inspection faults due to sensitivity to external environment. Thus, we intend to handle this problem by means of using Mask R-CNN instead of digital image processing algorithm. Additionally, Mask R-CNN can be trained with image dataset pre-processed by means of the specific designed digital image filter to extract the enhanced feature map of Convolutional Neural Network (CNN). Our approach converged advantage of digital image processing and instance segmentation with deep learning yields more efficient semiconductor photo lithography inspection system than conventional system.

• 디지털산업정보학회논문지
• /
• 제15권4호
• /
• pp.63-70
• /
• 2019

The subject of the simultaneous measuring system of base pattern and deposition pattern is a new research topic on a defect inspection of OLED. In this paper, we propose a new OLED inspection method that simultaneously measures standard and deposition pattern images. This method reduces unnecessary processes and tac time during OLED inspection. For an additional reduction of the tac time during pattern measurement, the ROI was configured to measure only in the designated ROI area instead of measuring the entire area of an image. During the ROI set-up, the value of effective deposition pattern area is included so that if the deposition pattern is out of the ROI zone, it would be treated as a defect before measuring the size and center point of the pattern. As a result, the tac time and inspection process could be shortened. The proposed method also could be applied to the OLED manufacturing process. Production of OLED could be increased by reducing tac time and inspection process.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
• /
• pp.561-562
• /
• 2009

본 연구에서는 PSC Box 교량을 대상으로 현재 교량 점검시 발생하는 문제점을 해결하고 유지 관리 담당자의 편의를 제공하며, Box 내부 점검작업을 보다 효율적이고 합리적으로 수행할 수 있는 새로운 점검 시스템을 개발하는 데 그 목적이 있다.

• 한국CDE학회논문집
• /
• 제22권1호
• /
• pp.44-58
• /
• 2017

The inspection for building occupancy authorization has lacked objectivity due to manual measurement methods. This is why connivance of the illegal buildings has been rampant, which has led to so many incidents. Consequently, this law has lost its intent to protect people's lives and property. In this study, for the purpose of improvement of this law, the research was conducted by the utilization of unmanned aerial vehicle for automated inspection for building occupancy authorization. Theoretical considerations about building occupancy authorization and the trend of UAV technology were accomplished. Secondly, a series of reverse engineering was conducted including digital photography, network RTK-VRS surveying and post-processing data. Thirdly, the resultant spatial information was used for building occupancy inspection authorization in a BIM platform and the effectiveness and applicability of UAV-based inspection was analyzed. As a result, methodology for UAV-based automated building occupancy inspection authorization was derived. And it was found that eleven items would be possible to be automated among thirty total items for building occupancy authorization. Also it was found that UAV-based automated inspection could be valid in inspecting building occupancy authorization due to authentic accuracy, effectiveness and applicability with government policy.

• 디지털산업정보학회논문지
• /
• 제5권1호
• /
• pp.99-105
• /
• 2009

Recently the research is much interested in about the inspection system using by computer vision system. In this paper, we deal with shape inspection technique for moving to be long and narrow object on conveyor belt. first, we are acquired for moving object on conveyor belt. then the object segmentation is using by color information for background and object. the object position be calculated by horizontal and a vertical histogram. second, we are checked for two hole in front part, widths and top/bottom side information in middle part, and finally checking for two holes in rear part. The performance of our proposed model is evaluated by experiments, within error of 1㎜, and can be checking to 17 object /min.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2011년도 제42회 하계학술대회
• /
• pp.1734-1735
• /
• 2011

In case of inspection on aluminum castings, traditional RT (Radiographic Testing) method have been utilized for its advantages in interpretation, cost and perpetual storage. But it has disadvantages like time consumption in film processing, low efficiency in storage and environmental pollution. In this thesis, a DRS (Digital Radiography System) utilizing X-Ray TDI Camera (Time Delay and Integration Camera) is developed. Inspections on aluminum castings are performed using the developed Digital Radiography System, DRS and reviewed if newly developed system can substitute for the traditional method.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2023년도 봄 학술논문 발표대회
• /
• pp.375-376
• /
• 2023

In this study, the legal and institutional status of construction supervising and construction inspector was identified. As a result of examining the definitions of construction supervision terms, focusing on domestic construction-related laws, it was found that there were no consistency between each laws regarding 'terminology' and 'definitions'. In addition, the scope of construction inspector's work continues to expand through the delegation provisions to lower statutes, however, responsibility, authority, and inspection cost are not taken into account properly. In addition in order to introduce digital technology to the smart construction site, which is currently active under way, it is judged that the law and institutional contents need to be improved further.