A measurement method of grounding impedance of a tree

Author

Yamaura, Itsuo ; Yajima, Masao ; Tanaka, Kyoko ; Fukuma, Hitoshi

Author_Institution

Fac. of Textile Sci. & Technol., Shinshu Univ., Nagano, Japan

Volume

3

fYear

2000

fDate

2000

Firstpage

1163

Abstract

This paper describes a method for measuring the grounding impedance of a tree. Electrode impedance of an electrode using for connection between the measurement circuit and the tree, brings serious error in the measurement. To avoid the effect of the electrode impedance, the four-electrode method known in the impedance measurement methodology, is newly introduced. The hybrid method of the four-electrode method and usual grounding impedance measurement method makes it possible to measure grounding impedance of the tree directly. The experiments of the measurement were conveyed for three materials, zelkova tree, cherry tree, and silk-tree with the girth of 1.7-2.0 meters. Obtained values of impedance were 60-100 O in absolute one, and they showed slight capacitive reactance. It is concluded that the presented method is available for the measurement of grounding impedance of the tree

Keywords

biological techniques; botany; electric impedance measurement; electrodes; 1.7 to 2 m; capacitive reactance; cherry tree; electrode impedance; equivalent circuit; error; four-electrode method; grounding impedance; grounding impedance measurement; hybrid method; impedance measurement; silk-tree; tree; zelkova tree; Circuits; Conducting materials; Current measurement; Electrodes; Grounding; Impedance measurement; Oscillators; Textiles; Voltage measurement; Zirconium;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE

Conference_Location

Baltimore, MD

ISSN

1091-5281

Print_ISBN

0-7803-5890-2

Type

conf

DOI

10.1109/IMTC.2000.848662

Filename

848662