In this study, the leak signal was measured by using an accelerometer to analyze the basic data and methodology for the development of the leak point estimation method in the water supply pipe. The measured results were analyzed by frequency analysis and cross-correlation analysis for leakage signals, and the error range was compared and analyzed with the actual leak point distance. As a result, it was confirmed that the vibration intensity due to leakage from the water leakage point was attenuated according to the distance. In the case of the ductile iron casting used in the experiment, the intensity of the signal at the 945 Hz, 1,500 Hz, 2,300 Hz band was increased with the change of the pressure in the pipe at 4mm of leakage hole. Also, it was confirmed that as the water pressure increases, the intensity of the leak signal increases but the similarity of the signal decreases. The results of this study confirm that the accelerometer sensor can be used efficiently for leak detection and it can be used as a basic data for the analysis for the development of leak point estimation method in the future.

ABSTRACT
 1. 서 론
 2. 연구방법
  2.1 실험장치 및 측정방법
  2.2 측정 및 분석 방법
 3. 연구 결과
  3.1 누수신호 특성
  3.2 누수지점 추정
 4. 결 론
 References

• 박상봉(서울시립대학교 환경공학과) | Sangbong Park (Department of environmental engineering, University of Seoul)
• 김기범(서울시립대학교 환경공학과) | Kibum Kim (Department of environmental engineering, University of Seoul)
• 서지원(서울시립대학교 환경공학과) | Jeewon Seo (Department of environmental engineering, University of Seoul)
• 김주언(한국종합엔지니어링) | Jueon Kim (Hankuk Engineering Consultants)
• 구자용(서울시립대학교 환경공학과) | Jayong Koo (Department of environmental engineering, University of Seoul) Corresponding author