The visual inspection device was developed for non-destructive test of piping from the inside. The developed components of the system can be classified as camera module, main body module named crawler module and system module. Because the system has driving part as electric motors, it can run not only the horizontal and vertical straight lines but also bend lines. The system has video processors, it can make it possible to display the video on the monitor and to save the video clips simultaneously. Several tests were performed to check the development objectives.

ABSTRACT
 1. 서 론
 2. 개발내용
  2.1 카메라 모듈
  2.2 크롤러 모듈
  2.3 시스템 모듈
 3. 개발제품 성능평가
  3.1 KTL 성능평가
 4. 결 론
 References

• 송성재(Department of Mechanical& Biomedical Enginerring, GangneungWonju National University) | S. J. Song Corresponding Author