The Study on the Configuration of Sensor Probe to Measure the Stem Water Content

Author

Wang, Hailan ; Bai, Chenxiang ; Zhao, Yandong

Author_Institution

Beijing Forestry Univ., Beijing

fYear

2008

fDate

10-12 Sept. 2008

Firstpage

696

Lastpage

699

Abstract

The measurement of volume water content in stem based on dielectric constant has been utilizing widely. A study based on SWR (standing wave ratio) technique was presented in this paper. The sensor probe plays an important role in determination of stem water content with a variety of instruments. Therefore, it is critical to study the length of the probe in order to improve the measuring accuracy of the instrument. Different organic liquids were chosen as the testing media to simulate the water stem. With the length of the probe the object is to measure the change of the output voltage UAB. The experimental results confirmed that the output voltage UAB is changed with the length of the probe. In addition, the data from the correlation demonstrated that the length of 50 mm is the best.

Keywords

electric sensing devices; organic compounds; permittivity; probes; radiofrequency measurement; voltage measurement; volume measurement; dielectric constant; organic liquids; sensor probe configuration; size 50 mm; standing wave ratio technique; stem water content measurement; Dielectric constant; Dielectric measurements; Distributed parameter circuits; Impedance; Length measurement; Probes; Transmission line measurements; Transmission line theory; Voltage; Volume measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008 China-Japan Joint

Conference_Location

Shanghai

Print_ISBN

978-1-4244-3821-1

Type

conf

DOI

10.1109/CJMW.2008.4772524

Filename

4772524