Acoustic Emission Transferability using Transfer Function
This paper presents an acoustic emission transferability method in applications of valve leakage rate detection and tool wear monitoring. The method aims to transfer the information between AE inspection systems using different types of sensor and position by relationship which was called a transfer function. The spectrum density function/AErms spectra of both wide band (WD) and resonance (R15 and R30) AE sensors were studied. The results demonstrate a very good similarity transfer function in various conditions. Three sets of cutting condition of tool wear monitoring in machining tests were conducted. A tool shank of type SDJCL 1616H 11 and carbide tool inserts of type CG 4035 DCMT 11 T3 04-UF (Sandvik Coromant) were used. Two AE sensors were mounted on the tool-holder: a WD sensor (PAC) at the end of the tool-holder and an R30 sensor (PAC) on the side. For valve leakage rate detection, artificial leaks from incomplete closure of ball valve are used to simulate the leakage. The tests were conduced by varying inlet pressure from 1 to 5 bars in three valve sizes of 1, 2 and 3 inches respectively. The AE signals detected at the two sensors (WD and R15) were analyzed in real-time using a Hewlett Packard HP 89410A. Transfer functions of two AE sensors are calculated and represented by the ratio of frequency responses of the two sensors. This is particularly useful since the information obtained from one sensor may be converted into another without having to repeat the experiments. With the proposed acoustic transferability, it will be possible to make comparison between results obtained from different set-ups.
Acoustic emission transfer function tool wear monitoring valve leakage rate.
Asa PRATEEPASEN Mantana SRINANG
Acoustic Emission and Advanced Nondestructive Testing Center King Mongkuts University of Technology Thonburi 126 Prachautid road, Tungkru, Bangkok 10140, Thailand
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
1605-1612
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）