An Experimental Study of Monitoring Internal Leakage in Water Hydraulic Cylinders Using Acoustic Emission
Chen, P
Mechanics of Machines Laboratory, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.

Chua, PS
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.

Lim, GH
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.

(Received 12 January 2004; accepted 31 May 2005)

Abstract
This paper studies experimentally acoustic emission (AE) to monitor internal leakage in modern water hydraulic cylinders. A series of experiments has been designed and carried out. Through these experiments, the background noise induced by the operation of a water hydraulic system is carefully determined, AE signals generated by a water hydraulic cylinder operating under different piston-sealing conditions are characterized, and AE signals generated by internal leakage in a water hydraulic cylinder are also characterized. The measured AE signals are analyzed using the power spectral density (PSD) technique. The results show that AE signals are sensitive to the internal leakage in a water hydraulic cylinder and are not affected by background noise. We conclude that AE can be used to develop an effective technique to monitor internal leakage in modern water hydraulic cylinders.

Keywords:
acoustic emission, condition monitoring, internal leakage, leakage, water hydraulic cylinder, water hydraulic cylinders

Paper ID: JTE12534
DOI: 10.1520/JTE12534

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Author Chen, P Affiliation Mechanics of Machines Laboratory, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore. Author Chua, PS Affiliation School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore. Author Lim, GH Affiliation School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore. Author Chen P, Chua PS, Lim GH Title An Experimental Study of Monitoring Internal Leakage in Water Hydraulic Cylinders Using Acoustic Emission Symposium , Committee on