JPS6152946B2 - - Google Patents
Info
- Publication number
- JPS6152946B2 JPS6152946B2 JP7442582A JP7442582A JPS6152946B2 JP S6152946 B2 JPS6152946 B2 JP S6152946B2 JP 7442582 A JP7442582 A JP 7442582A JP 7442582 A JP7442582 A JP 7442582A JP S6152946 B2 JPS6152946 B2 JP S6152946B2
- Authority
- JP
- Japan
- Prior art keywords
- test object
- moisture content
- capacitance
- electrode
- insulating material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004020 conductor Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 4
- 239000012777 electrically insulating material Substances 0.000 claims 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000011810 insulating material Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000005011 phenolic resin Substances 0.000 description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- 229930182556 Polyacetal Natural products 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- 229920006324 polyoxymethylene Polymers 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【発明の詳細な説明】
本発明は紙、繊維、毛髪等の被検体の含水率を
測定する含水率の測定装置に関し、特に該被検体
の厚みが異なつても該被検体の含水率を正確且つ
迅速に測定できる含水率の測定装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a moisture content measuring device for measuring the moisture content of a specimen such as paper, fiber, hair, etc., and in particular, it is capable of accurately measuring the moisture content of the specimen even if the thickness of the specimen differs. The present invention also relates to a moisture content measuring device that can quickly measure moisture content.
一般に、誘電率と含水率との関係は次の近似式
で表わされる。すなわち
ε−ε０＝KM
ただし、εは含水率Ｍにおける材質の誘電率、
ε０は材質固有の誘電率、Ｋは材質によつて決ま
る定数である。 Generally, the relationship between dielectric constant and water content is expressed by the following approximate equation. That is, ε−ε 0 = KM, where ε is the dielectric constant of the material at the water content M,
ε 0 is a dielectric constant specific to the material, and K is a constant determined by the material.
従つて、含水率Ｍにおける材質の誘電率εの変
化を測定することにより、その含水率Ｍを算出す
ることができるが、そのためには、測定条件を同
一にして含水率Ｍにおける材質の静電容量を測定
すればよいことになる。 Therefore, by measuring the change in the dielectric constant ε of a material at a moisture content M, the moisture content M can be calculated. All you have to do is measure the capacity.
従来、上記の点に鑑みて高周波により被検体の
静電容量を測定し該被検体の含水率を測定する含
水率の測定装置が提案されているが、その従来の
含水率の測定装置は第１図に示すようにシグナル
電極１とアース電極２との間に被検体３をはさみ
込み、該シグナル電極１とアース電極２間に高周
波容量計を接続し、該高周波容量計により上記被
検体３の静電容量を測定し、該被検体３の含水率
を測定するように構成したものや第２図に示すよ
うにシグナル電極１の両側にアース電極２が位置
するように該シグナル電極１及びアース電極２を
電気絶縁材４に固着し、該シグナル電極１とアー
ス電極２の上に被検体３を押しつけ、該シグナル
電極１とアース電極２間に高周波容量計を接続
し、該高周波容量計により上記被検体３の静電容
量を測定し、該被検体３の含水率を測定するよう
に構成したものである。 Conventionally, in view of the above points, a moisture content measuring device has been proposed that measures the capacitance of a test object using high frequency and measures the moisture content of the test object. As shown in Fig. 1, a subject 3 is sandwiched between a signal electrode 1 and a ground electrode 2, a high frequency capacitance meter is connected between the signal electrode 1 and a ground electrode 2, and the subject 3 is measured by the high frequency capacitance meter. The signal electrode 1 and the signal electrode 1 are arranged so that the ground electrodes 2 are located on both sides of the signal electrode 1, as shown in FIG. The ground electrode 2 is fixed to the electrical insulating material 4, the subject 3 is pressed onto the signal electrode 1 and the ground electrode 2, and a high frequency capacitance meter is connected between the signal electrode 1 and the ground electrode 2. The apparatus is configured to measure the capacitance of the subject 3 and measure the water content of the subject 3.
上記第１図に示すように構成した含水率の測定
装置により被検体３として紙の静電容量を測定し
た時の被検体３の厚みと静電容量との関係を第３
図に示し、上記第２図に示すように構成した含水
率の測定装置により被検体３として紙の静電容量
を測定した時の被検体３の厚みと静電容量との関
係を第４図に示したものであり、この第３図及び
第４図から明らかな如く上記第１図及び第２図に
示すように構成した含水率の測定装置であれば、
被検体３の厚みにより該被検体３の静電容量が大
きく変化し、従つて該被検体３の含水率を正確に
測定できない欠点があつた。 The relationship between the thickness of the specimen 3 and the capacitance when measuring the capacitance of paper as the specimen 3 using the moisture content measuring device configured as shown in FIG.
Figure 4 shows the relationship between the thickness of the specimen 3 and the capacitance when the capacitance of paper as the specimen 3 is measured using the moisture content measuring device configured as shown in Figure 2 above. As is clear from FIGS. 3 and 4, if the moisture content measuring device is constructed as shown in FIGS. 1 and 2,
The capacitance of the test object 3 varies greatly depending on the thickness of the test object 3, and therefore, there is a drawback that the moisture content of the test object 3 cannot be measured accurately.
本発明は上記のような欠点を除去した含水率の
測定装置に関するものである。 The present invention relates to a moisture content measuring device that eliminates the above-mentioned drawbacks.
以下本発明の含水率の測定装置の一実施例を第
５図乃至第１０図とともに説明する。 An embodiment of the moisture content measuring device of the present invention will be described below with reference to FIGS. 5 to 10.
本発明の含水率の測定装置は第５図に示すよう
にシグナル電極１１とアース電極１２を電気絶縁
材１３に固着して電極１４を構成し、該電極１４
を導電体１５でシールドするとともに該電極１４
のアース電極１２を導電体１５に接続し、該電極
１４のシグナル電極１１及びアース電極１２に対
向する如く上記導電体１５とシールド線１６を介
して接続した導電体１７でシールドした電気絶縁
材１８を設け、該電極１４のシグナル電極１１及
びアース電極１２と導電体１７でシールドした電
気絶縁材１８との間に被検体１９をはさみ込むよ
うに該電極１４と電気絶縁材１８を配置し、該電
極１４のシグナル電極１１を高周波容量計２０の
一方にシールド線２１により接続するとともに該
高周波容量計２０の他方に上記導電体１５をシー
ルド線２２を介して接続し、該高周波容量計２０
により上記被検体１９の静電容量を測定し、該被
検体１９の含水率を測定するように構成したもの
である。 As shown in FIG. 5, the moisture content measuring device of the present invention has an electrode 14 configured by fixing a signal electrode 11 and a ground electrode 12 to an electrical insulating material 13.
is shielded with a conductor 15 and the electrode 14
The ground electrode 12 of the electrode 14 is connected to a conductor 15, and the electrical insulating material 18 is shielded with a conductor 17 connected to the conductor 15 via a shield wire 16 so as to face the signal electrode 11 of the electrode 14 and the ground electrode 12. The electrode 14 and the electrical insulating material 18 are arranged so that the subject 19 is sandwiched between the signal electrode 11 and the ground electrode 12 of the electrode 14 and the electrical insulating material 18 shielded with the conductor 17. The signal electrode 11 of the electrode 14 is connected to one side of the high frequency capacitance meter 20 via a shielded wire 21, and the conductor 15 is connected to the other side of the high frequency capacitance meter 20 via a shielded wire 22.
The capacitance of the test object 19 is measured by the above method, and the moisture content of the test object 19 is measured.
尚、上記構成において、電極１４は特に第６図
及び第７図に示すように櫛状に形成したシグナル
電極１１の周囲をアース電極１２が囲むように該
シグナル電極１１及びアース電極１２を電気絶縁
材１３に固着して構成するものであり、また電気
絶縁材１８は特に第６図及び第８図に示すように
電気絶縁材１８に導電体１７を固着して構成した
ものである。この第６図乃至第８図は実際の寸法
の４倍の大きさである。また第６図は第７図の電
極１４及び第８図の電気絶縁材１８をＸ―X′の
線での断面にて対向させた構成図である。 In the above structure, the electrode 14 is electrically insulated between the signal electrode 11 and the ground electrode 12 so that the ground electrode 12 surrounds the signal electrode 11 formed in a comb shape, as shown in FIGS. 6 and 7. The electrical insulating material 18 is constructed by fixing the conductor 17 to the electrical insulating material 18, as shown in FIGS. 6 and 8. 6 to 8 are four times the actual size. Further, FIG. 6 is a structural diagram in which the electrode 14 of FIG. 7 and the electrical insulating material 18 of FIG. 8 are opposed to each other in a cross section taken along the line X--X'.
第９図は第５図に示した本発明の含水率の測定
装置の構成で被検体１９として紙の静電容量を測
定した時の被検体１９の厚みと静電容量の関係を
示したもので、ある範囲の厚さの被検体１９にお
いてほぼ一定の静電容量となつている。 FIG. 9 shows the relationship between the thickness of the test object 19 and the capacitance when the capacitance of paper as the test object 19 is measured using the configuration of the moisture content measuring device of the present invention shown in FIG. Therefore, the capacitance is approximately constant in the test object 19 having a certain range of thickness.
この測定にあたつては、電気絶縁材１３として
フエノール樹脂を用いるとともに電気絶縁材１８
としてフエノール樹脂及びポリアセタールを用い
た。第９図において電気絶縁材１８としてフエノ
ール樹脂を用いた場合を実線でポリアセタールを
用いた場合を破線で示す。 In this measurement, phenol resin was used as the electrical insulating material 13, and the electrical insulating material 18 was
Phenol resin and polyacetal were used as the material. In FIG. 9, the case where phenolic resin is used as the electrical insulating material 18 is shown by a solid line, and the case where polyacetal is used is shown by a broken line.
この第９図からわかるように電気絶縁材１８と
してポリアセタールを用いるよりフエノール樹脂
を用いる方が、被検体１９の厚みに関係なく（あ
る範囲の厚さで）一定の静電容量となりやすい。
また、電気絶縁材１８の材質によつて特性が異な
るが、上記のように被検体１９が紙の時に電気絶
縁材１８としてフエノール樹脂を用いたように、
電気絶縁材１８としては被検体１９の誘電率に近
似した誘電率をもつものを選べばよい。 As can be seen from FIG. 9, using phenolic resin as the electrical insulating material 18 is easier to achieve a constant capacitance regardless of the thickness of the object 19 (within a certain range of thickness) than using polyacetal.
In addition, although the characteristics differ depending on the material of the electrical insulating material 18, as described above when the subject 19 is paper, phenolic resin is used as the electrical insulating material 18.
As the electrical insulating material 18, a material having a dielectric constant close to that of the subject 19 may be selected.
上記のようにして、含水率の異なる被検体
（紙）１９の静電容量を測定すると、例えば第１
０図に示すようになり、該被検体（紙）１９の静
電容量から該被検体（紙）１９の含水率を求める
ことができる。 When the capacitance of the test object (paper) 19 with different moisture contents is measured as described above, for example, the first
As shown in FIG. 0, the moisture content of the subject (paper) 19 can be determined from the capacitance of the subject (paper) 19.
上記のように本発明の含水率の測定装置による
と、被検体の厚みに左右されることなく（被検体
の厚みがある範囲内において）、該被検体の静電
容量が測定でき、その結果から該被検体の含水率
が算出されるので極めて有意義である。 As described above, according to the moisture content measuring device of the present invention, the capacitance of the specimen can be measured without being influenced by the thickness of the specimen (within a certain thickness range of the specimen). This is extremely meaningful because the water content of the subject can be calculated from the above.
尚、上記実施例における静電容量の測定には、
周波数1MHzの高周波を用いたが、周波数100KHz
や10MHz等の高周波も同様で用いることができ
る。 In addition, in the measurement of capacitance in the above example,
A high frequency with a frequency of 1MHz was used, but the frequency was 100KHz.
High frequencies such as 10MHz and 10MHz can also be used in the same manner.
本発明の含水率の測定装置は上記のような構成
であるから、比較的簡単な電極で紙、繊維、毛髪
等の被検体の含水率を正確且つ迅速に測定するこ
とができ、被検体を破壊することはない。 Since the moisture content measuring device of the present invention has the above-described configuration, it is possible to accurately and quickly measure the moisture content of objects such as paper, fibers, and hair using relatively simple electrodes. It will not be destroyed.
第１図及び第２図は従来の含水率の測定装置の
電極と被検体の構成図、第３図及び第４図は第１
図及び第２図の従来の含水率の測定装置による測
定結果の静電容量と厚みの関係図、第５図は本発
明の含水率の測定装置の構成図、第６図は第５図
の電極と電気絶縁材の断面拡大構成図、第７図は
第６図の電極の平面拡大構成図、第８図は第６図
の電気絶縁材の背面拡大構成図、第９図は第５図
の本発明の含水率の測定装置による測定結果の静
電容量と厚みの関係図、第１０図は第９図の測定
結果に基く静電容量と含水率の関係図である。
図面中、１１はシグナル電極、１２はアース電
極、１４は電極、１８は電気絶縁材、１９は被検
体を示す。
Figures 1 and 2 are configuration diagrams of the electrodes and specimen of a conventional water content measuring device, and Figures 3 and 4 are
Figure 2 is a diagram showing the relationship between capacitance and thickness as measured by a conventional moisture content measuring device, Figure 5 is a configuration diagram of the moisture content measuring device of the present invention, and Figure 6 is a diagram of the relationship between capacitance and thickness as measured by a conventional moisture content measuring device. FIG. 7 is an enlarged plan view of the electrode in FIG. 6, FIG. 8 is an enlarged rear view of the electrical insulator in FIG. 6, and FIG. FIG. 10 is a diagram showing the relationship between capacitance and thickness based on the measurement results shown in FIG. 9. In the drawings, 11 is a signal electrode, 12 is a ground electrode, 14 is an electrode, 18 is an electrical insulating material, and 19 is a subject.
Claims (1)
体の静電容量を測定し該被検体の含水率を測定す
る含水率の測定装置において、電気絶縁材で絶縁
されたシグナル電極及びアース電極からなる複合
電極と被検体の誘電率に近似した誘電率をもち導
電体でアースされた電気絶縁材との間に被検体を
はさみこんで該被検体に高周波を印加する印加手
段を備えてなることを特徴とする含水率の測定装
置。1. A water content measurement device that measures the capacitance of a test object by applying a high frequency to the test object and measures the water content of the test object, which consists of a signal electrode and a ground electrode insulated with an electrically insulating material. The test object is sandwiched between the composite electrode and an electrically insulating material having a dielectric constant approximate to that of the test object and grounded with a conductor, and is equipped with an application means for applying a high frequency to the test object. Characteristic moisture content measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7442582A JPS58190752A (en) | 1982-04-30 | 1982-04-30 | Apparatus for measuring water content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7442582A JPS58190752A (en) | 1982-04-30 | 1982-04-30 | Apparatus for measuring water content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58190752A JPS58190752A (en) | 1983-11-07 |
| JPS6152946B2 true JPS6152946B2 (en) | 1986-11-15 |
Family
ID=13546832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7442582A Granted JPS58190752A (en) | 1982-04-30 | 1982-04-30 | Apparatus for measuring water content |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58190752A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0536451A1 (en) * | 1991-10-09 | 1993-04-14 | Mitsubishi Denki Kabushiki Kaisha | Interfacial component detection apparatus and method therefor |
| CN101252881B (en) * | 2005-09-02 | 2010-05-26 | 宝洁公司 | method for measuring skin moisture content |
| MX2008003077A (en) * | 2005-09-02 | 2008-03-19 | Procter & Gamble | Methods for measuring moisture as a predictor of scalp health. |
-
1982
- 1982-04-30 JP JP7442582A patent/JPS58190752A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58190752A (en) | 1983-11-07 |
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