Magnetic method for measuring moisture content using diamagnetic characteristics of water

Keiji Tsukada, Matsunaga Yasuaki, Nakamura Yuta, Isshiki Ryota, Fujimoto Kayo, Kenji Sakai, Toshihiko Kiwa

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Moisture content measurements of rice kernels and soil are important for agriculture. Therefore, in this study, a new measurement method using the diamagnetic characteristics of water was developed for measurements of the moisture content of rice kernels and soil. The magnetic characteristics of the samples were determined using a magnetometer developed by us based on a superconducting quantum interference device. Because of the diamagnetic characteristics of water, the susceptibility of rice kernels became more negative with increasing moisture content. In the case of soil, which is a mixture of diamagnetic and ferromagnetic materials, a second-harmonic detection method using AC with DC bias magnetic field was applied to reduce the influence of the ferromagnetic signal. The intensity of the second-harmonic signal of a soil was determined to be proportional to its moisture content.

Original languageEnglish
Article number014010
JournalMeasurement Science and Technology
Volume28
Issue number1
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Moisture Content
moisture content
Soil
soils
rice
Moisture
Soils
Water
kernel
water
Diamagnetic materials
Harmonic
Ferromagnetic Materials
Quantum Interference
harmonics
Ferromagnetic materials
agriculture
ferromagnetic materials
SQUIDs
Agriculture

Keywords

  • diamagnetism
  • magnetometer
  • moisture content
  • rice kernel
  • soil

ASJC Scopus subject areas

  • Instrumentation
  • Applied Mathematics

Cite this

Magnetic method for measuring moisture content using diamagnetic characteristics of water. / Tsukada, Keiji; Yasuaki, Matsunaga; Yuta, Nakamura; Ryota, Isshiki; Kayo, Fujimoto; Sakai, Kenji; Kiwa, Toshihiko.

In: Measurement Science and Technology, Vol. 28, No. 1, 014010, 01.01.2017.

Research output: Contribution to journalArticle

@article{61adff9ccd2c4a30bafef408756b21a6,
title = "Magnetic method for measuring moisture content using diamagnetic characteristics of water",
abstract = "Moisture content measurements of rice kernels and soil are important for agriculture. Therefore, in this study, a new measurement method using the diamagnetic characteristics of water was developed for measurements of the moisture content of rice kernels and soil. The magnetic characteristics of the samples were determined using a magnetometer developed by us based on a superconducting quantum interference device. Because of the diamagnetic characteristics of water, the susceptibility of rice kernels became more negative with increasing moisture content. In the case of soil, which is a mixture of diamagnetic and ferromagnetic materials, a second-harmonic detection method using AC with DC bias magnetic field was applied to reduce the influence of the ferromagnetic signal. The intensity of the second-harmonic signal of a soil was determined to be proportional to its moisture content.",
keywords = "diamagnetism, magnetometer, moisture content, rice kernel, soil",
author = "Keiji Tsukada and Matsunaga Yasuaki and Nakamura Yuta and Isshiki Ryota and Fujimoto Kayo and Kenji Sakai and Toshihiko Kiwa",
year = "2017",
month = "1",
day = "1",
doi = "10.1088/1361-6501/28/1/014010",
language = "English",
volume = "28",
journal = "Measurement Science and Technology",
issn = "0957-0233",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Magnetic method for measuring moisture content using diamagnetic characteristics of water

AU - Tsukada, Keiji

AU - Yasuaki, Matsunaga

AU - Yuta, Nakamura

AU - Ryota, Isshiki

AU - Kayo, Fujimoto

AU - Sakai, Kenji

AU - Kiwa, Toshihiko

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Moisture content measurements of rice kernels and soil are important for agriculture. Therefore, in this study, a new measurement method using the diamagnetic characteristics of water was developed for measurements of the moisture content of rice kernels and soil. The magnetic characteristics of the samples were determined using a magnetometer developed by us based on a superconducting quantum interference device. Because of the diamagnetic characteristics of water, the susceptibility of rice kernels became more negative with increasing moisture content. In the case of soil, which is a mixture of diamagnetic and ferromagnetic materials, a second-harmonic detection method using AC with DC bias magnetic field was applied to reduce the influence of the ferromagnetic signal. The intensity of the second-harmonic signal of a soil was determined to be proportional to its moisture content.

AB - Moisture content measurements of rice kernels and soil are important for agriculture. Therefore, in this study, a new measurement method using the diamagnetic characteristics of water was developed for measurements of the moisture content of rice kernels and soil. The magnetic characteristics of the samples were determined using a magnetometer developed by us based on a superconducting quantum interference device. Because of the diamagnetic characteristics of water, the susceptibility of rice kernels became more negative with increasing moisture content. In the case of soil, which is a mixture of diamagnetic and ferromagnetic materials, a second-harmonic detection method using AC with DC bias magnetic field was applied to reduce the influence of the ferromagnetic signal. The intensity of the second-harmonic signal of a soil was determined to be proportional to its moisture content.

KW - diamagnetism

KW - magnetometer

KW - moisture content

KW - rice kernel

KW - soil

UR - http://www.scopus.com/inward/record.url?scp=85007045336&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85007045336&partnerID=8YFLogxK

U2 - 10.1088/1361-6501/28/1/014010

DO - 10.1088/1361-6501/28/1/014010

M3 - Article

AN - SCOPUS:85007045336

VL - 28

JO - Measurement Science and Technology

JF - Measurement Science and Technology

SN - 0957-0233

IS - 1

M1 - 014010

ER -