Non-contact and non-destructive measurement for plant root gtwoth using acoustic emission

1996 Fiscal Year Final Research Report Summary

• Project/Area Number: 07660340
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 農業機械学
• Research Institution: KYOTO UNIVERSITY
• Principal Investigator: SHIMIZU Hiroshi Graduate School of Agriculture, Kyoto University Instructor, 農学研究科, 助手 (50206207)
• Project Period (FY): 1995 – 1996
• Keywords: acoustic emission / plant growth / root area / non-destructive / non-contact / measurement

Research Abstract

Acoustic emission waves, generated forom the soil filled up in a pot, were measured and transformed into frequency domain using fourier transformation. The data were obtained repeatedly on condition of diameters of detect bar in the measurement system. The acquired data were taken notice of peak frequency and intensity. It was clear that analyzed data were found to be scattered and were caused by the system characteristic frequency. Since one way for removing the system characteristic frequency was to divid the measured data in frequency domain by the system transfer function, the transfer function was measured by input white noise generated from signal synthesizer into the system and the transformed data to frequency domain of output were regarded as the transfer function. The measured data then were processed using the transfer function, and results were depended upon the diameter of detect bar. It was apparent that acoustic emission derived from soil was relied to shape and section area of penetrating apparatus and there is a potential to analyze plant growth in root area by utilizing acoustic emission.