JPS61129560A - Electrostatic capacity type moisture measuring instrument - Google Patents
Electrostatic capacity type moisture measuring instrumentInfo
- Publication number
- JPS61129560A JPS61129560A JP25272584A JP25272584A JPS61129560A JP S61129560 A JPS61129560 A JP S61129560A JP 25272584 A JP25272584 A JP 25272584A JP 25272584 A JP25272584 A JP 25272584A JP S61129560 A JPS61129560 A JP S61129560A
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- level
- value
- electrodes
- counter electrodes
- 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.)
- Granted
Links
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
Abstract
Description
【発明の詳細な説明】
本発明は被測定物を対向電極間に介在させて水分値を静
電容量値として測定する静電容量式水分測定装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a capacitive moisture measuring device that measures a moisture value as a capacitance value by interposing an object to be measured between opposing electrodes.
この種の水分測定装置では第１図に示すようにタンク（
ＩＪの内壁（２）に前記対向電極が形成された絶縁板（
３）が収付けられている。この絶縁板（３）は第２図に
示すようにその表面に対向電極（４ａ）（４ａ）が形成
されている。タンク（２）内の被測定物のレベルが第１
図のＡのように対向電極（４ａ）（４ｂ）のはるか上方
にある場合には水分値を正確に検出できるが、タンク（
１）の底部排出口に装着された開閉装置（５）を開いて
被測定物を順次必要量づつ払出してレベル（Ｂｌや（Ｄ
Ｉまで減少した場合には、対向電極（４ａ）（４ｂ）の
一方から他方に向かうｔ気力線のうち、水分値の測定に
重大な影響を与えるだけのものが被測定物を通らずに飛
ぶため、このような伏患では信頼できる水分情報を得る
ことができない。This type of moisture measuring device has a tank (
An insulating plate (2) on which the counter electrode is formed on the inner wall (2) of the IJ.
3) are included. As shown in FIG. 2, this insulating plate (3) has counter electrodes (4a) (4a) formed on its surface. The level of the object to be measured in the tank (2) is the first
As shown in A in the figure, the moisture value can be detected accurately if the electrode is far above the counter electrodes (4a) (4b), but the tank (
1), the opening/closing device (5) attached to the bottom outlet of
When it decreases to I, out of the t air lines heading from one side of the counter electrodes (4a) (4b) to the other, those that have a significant effect on the measurement of the moisture value will fly without passing through the object to be measured. Therefore, reliable moisture information cannot be obtained in such cases.
しかし従来では対向電極間の静電＠量に応じて求められ
た水分値が信頼できるものであるか否かの判定は一切行
われていないため、被測定物レベルが（８）、（Ｄ＋に
減少したような状態では信頼性の低下したことを知らず
に水分情報を読み収っているのが現状である。However, in the past, no judgment was made whether or not the moisture value determined according to the amount of electrostatic charge between opposing electrodes was reliable. Currently, when moisture content is reduced, the moisture information is read without knowing that the reliability has deteriorated.
本発明は信頼性の低下した水分情報を読み取るような事
態を回避でき、しかも機械的な構造の簡単な静電容量式
水分測定装置を慶供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a capacitance type moisture measuring device which can avoid a situation where moisture information is read with reduced reliability and has a simple mechanical structure.
本発明の静電容量式水分測定装置は、主対向電極間に介
在する被測定物の水分値を前記主対向電極間の静電容量
値として検出するよう構成すると共に、前記主対向電極
配設位置よりも上方の水分値測定下限レベル近傍に補助
対向電極を設け、この補助対向電極間の静電容量値から
被測定物が前記水分値測定下限レベル以上か否かを判定
して主対向電極間の静電容量値に基づく水分測定値の有
効・無効を判定するように処理回路を構成したここ
と全特徴とする。The capacitive moisture measuring device of the present invention is configured to detect the moisture value of the object to be measured interposed between the main opposing electrodes as a capacitance value between the main opposing electrodes, and An auxiliary counter electrode is provided above the position near the lower limit level for moisture value measurement, and it is determined from the capacitance value between the auxiliary counter electrodes whether or not the object to be measured is at or above the lower limit level for moisture value measurement. The entire feature is that the processing circuit is configured to determine whether the moisture measurement value is valid or invalid based on the capacitance value between the two.
つまり、水分値検出用の主対向電極専用に設けられたレ
ベル計の結果に基づいて水分測定値の有効・無効を自動
的に判定するため、信頼性全保障できる水分測定値だけ
を読み収ることができる。In other words, since it automatically determines whether the moisture measurement value is valid or invalid based on the results of the level meter installed exclusively for the main counter electrode for moisture value detection, only moisture measurement values that can fully guarantee reliability can be read. be able to.
更に、水分検出と共にレベル検出を静電容量式にしたた
め、光電式等の別の形式のレベル計を使用するものに比
べてセンナ部の収り付けなどの実装上の機械的な構造を
簡単にできるものである。Furthermore, since both moisture detection and level detection are capacitive, the mechanical structure for mounting, such as installing the sensor part, is easier than when using another type of level meter such as a photoelectric type. It is possible.
以下、本発明の一実施例を第３図に基づいて説明する。Hereinafter, one embodiment of the present invention will be described based on FIG. 3.
（４ａ）（４ｂ）は第２図と同様（絶縁板（３）上に形
成された一対の主対向電極、（６ａ）（６ｂ）は一対の
補助対向電極で、主対向電極（４ａ）（４ｂ）の上方に
位置するよう前記絶縁板（３）上に形成されている。（
７）は静電容量測定回路で、入力にはスキャン信号（Ｐ
Ｉによって交互に切換えられるマルチプレクサ（８）と
デマルチプレクサ（９）のうちのマルチプレクサ（８）
を介してでそれぞれの並列出力信号に変換されている。(4a) and (4b) are a pair of main opposing electrodes formed on the insulating plate (3), as in FIG. 2, (6a) and (6b) are a pair of auxiliary opposing electrodes; 4b) on the insulating plate (3).
7) is a capacitance measuring circuit, and the scan signal (P
multiplexer (8) of multiplexer (8) and demultiplexer (9) alternately switched by I;
are converted into respective parallel output signals through the .
αＧはコンパレータで、デマルチプレクサ（９）の出力
に発生する前記補助対向電極（６ａ）（６ｂ）閾の静電
容量値Ｃ３ｔ−基準値Ｃｒと比較してレベルＢＫ＊測定
物が存在するか否かを判定する。仙は水分情報転送回路
で、デマルチプレクサ（９）の出力に発生する前記主対
向電極（４ａ）（４ｂ）間の静電容量値Ｃｓｓを一定時
間ごとに読み込むと共に、読み込んだ静電容量値Ｃｓｓ
はその際の前記コンパレータ翰の判定が０≦Ｃｒの場合
に限って後段に出力され、Ｃ５＞Ｃｒの場合には後段に
出力せずに消去される。αG is a comparator, which compares the threshold capacitance value C3t of the auxiliary counter electrodes (6a) (6b) generated at the output of the demultiplexer (9) with the reference value Cr to determine whether the level BK*measurement object exists or not. Determine whether Sen is a moisture information transfer circuit that reads the capacitance value Css between the main opposing electrodes (4a) and (4b) generated at the output of the demultiplexer (9) at regular intervals, and also reads the read capacitance value Css.
is output to the subsequent stage only when the judgment of the comparator hand is 0≦Cr, and is erased without being output to the subsequent stage when C5>Cr.
このように、信頼性を保障できない恐れのある水分情報
は水分情報転送回路αυでコンパレータ（ＩＱの判定結
果に基づいて選択されるため、誤った水分情報を読み収
ることがない。また、センナ部としては補助対向電極（
６ａ）（６ｂ）を絶縁板（３）上に増設するだけで済む
ため機械的構造が簡単である。In this way, moisture information whose reliability may not be guaranteed is selected by the comparator (IQ) in the moisture information transfer circuit αυ, so incorrect moisture information will not be read. The auxiliary counter electrode (
The mechanical structure is simple because it is sufficient to simply add the elements 6a and 6b on the insulating plate (3).
史に、スキャンすることで１台の静電容量測定回路（７
）によって主対向を極（４ａ）（４ｂ）間と補助対向′
ｖＬ極（６ａ）（６ｂ）間の靜′ｄｔ容量を測定するた
り、僅かのコストアップで実現できるものである。Historically, one capacitance measurement circuit (7
) makes the main opposition between poles (4a) and (4b) and the auxiliary opposition'
This can be achieved by measuring the dt capacitance between the vL poles (6a) and (6b), and with a slight increase in cost.
以上説明のように本発明の静電容量式水分測定Ｓ＊によ
ると、水分測定用の主対向電極とは別にレベル検出用に
補助対向電極を設けて、補助対向電極から得られるレベ
ル情報に基づ９て主対向電極から得られる水分値情報の
信頼性を判別するため、信頼性の低下した水分値情報を
睨み取るような事Ｓを回避できる。更に、水分検出と共
にレベル検出を静電容量式にしたため、光電式等の別の
形式のレベル計を使用するものに比べてセンナ部の収り
付けなどの実装上の機械的な構造を簡単にできるもので
ある。As explained above, according to the capacitive moisture measurement S* of the present invention, an auxiliary counter electrode is provided for level detection in addition to the main counter electrode for moisture measurement, and level information obtained from the auxiliary counter electrode is used. First, since the reliability of the moisture value information obtained from the main counter electrode is determined, it is possible to avoid the situation where the moisture value information with decreased reliability is overlooked. Furthermore, since both moisture detection and level detection are capacitive, the mechanical structure for mounting, such as installing the sensor part, is easier than when using another type of level meter such as a photoelectric type. It is possible.
第１図は貯蔵タンクの一部切欠き正面図、第２図は従来
の水分検出用電極の斜視図、第３図は本発明の静電容量
式水分測定装置の一実施例の要部斜視図と処理回路の構
成を示す。
（１）・・・タンク、（３）・・・絶縁板、 （４ａ）
（４ｂ）・・・主対向電極、（６ａ）（６ｂ）・・・補
助対向電極、（７）・・・静’Ｉｔ谷量測定回路、（８
）・・・マルチプレクサ、（９Ｉ・・・デマルチプレク
サ、叫・・・コンパレータ、αυ・・・水分情報転送回
路代理人 森 本 義 弘
第１図
第２図Fig. 1 is a partially cutaway front view of a storage tank, Fig. 2 is a perspective view of a conventional moisture detection electrode, and Fig. 3 is a perspective view of essential parts of an embodiment of the capacitive moisture measuring device of the present invention. The figure and the configuration of the processing circuit are shown. (1)...Tank, (3)...Insulating plate, (4a)
(4b)... Main counter electrode, (6a) (6b)... Auxiliary counter electrode, (7)... Static valley amount measuring circuit, (8
)...Multiplexer, (9I...Demultiplexer, Comparator, αυ...Moisture information transfer circuit agent Yoshihiro Morimoto Figure 1 Figure 2
Claims (1)
対向電極間の静電容量値として検出するよう構成すると
共に、前記主対向電極配設位置よりも上方の水分値測定
下限レベル近傍に補助対向電極を設け、この補助対向電
極間の静電容量値から被測定物が前記水分値測定下限レ
ベル以上か否かを判定して主対向電極間の静電容量値に
基づく水分測定値の有効・無効を判定するように処理回
路を構成した静電容量式水分測定装置。 ２、処理回路を、１台の静電容量測定回路で主対向電極
と補助対向電極とを交互にスキャンして各静電容量値を
測定するように構成したことを特徴とする特許請求の範
囲第１項記載の静電容量式水分測定装置。[Scope of Claims] 1. The moisture value of the object to be measured interposed between the main opposing electrodes is configured to be detected as the capacitance value between the main opposing electrodes; An auxiliary counter electrode is provided near the moisture value measurement lower limit level, and it is determined from the capacitance value between the auxiliary counter electrodes whether or not the object to be measured is at or above the moisture value measurement lower limit level, and the electrostatic charge between the main opposing electrodes is determined. A capacitive moisture measuring device that has a processing circuit configured to determine whether a moisture measurement value is valid or invalid based on a capacitance value. 2. Claims characterized in that the processing circuit is configured so that one capacitance measuring circuit alternately scans the main counter electrode and the auxiliary counter electrode to measure each capacitance value. 2. The capacitive moisture measuring device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25272584A JPS61129560A (en) | 1984-11-28 | 1984-11-28 | Electrostatic capacity type moisture measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25272584A JPS61129560A (en) | 1984-11-28 | 1984-11-28 | Electrostatic capacity type moisture measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61129560A true JPS61129560A (en) | 1986-06-17 |
| JPH0317294B2 JPH0317294B2 (en) | 1991-03-07 |
Family
ID=17241392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25272584A Granted JPS61129560A (en) | 1984-11-28 | 1984-11-28 | Electrostatic capacity type moisture measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61129560A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432068B2 (en) | 2000-03-30 | 2008-10-07 | Siemens Aktiengesellschaft | Biosensor and method for detecting macromolecular biopolymers using a biosensor |
| JP2013195118A (en) * | 2012-03-16 | 2013-09-30 | Life Co Ltd | Electrostatic capacitance type moisture sensor and moisture measuring device |
-
1984
- 1984-11-28 JP JP25272584A patent/JPS61129560A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432068B2 (en) | 2000-03-30 | 2008-10-07 | Siemens Aktiengesellschaft | Biosensor and method for detecting macromolecular biopolymers using a biosensor |
| JP2013195118A (en) * | 2012-03-16 | 2013-09-30 | Life Co Ltd | Electrostatic capacitance type moisture sensor and moisture measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0317294B2 (en) | 1991-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2270401T3 (en) | BIOSENSOR METER WITH SAFE PROCEDURES IN CASE OF FAILURE TO AVOID WRONG INDICATIONS. | |
| US6609421B2 (en) | Sideslip correction for a multi-function three probe air data system | |
| EP0845688A3 (en) | System and method for measurement, analysis and assessment of ground structures | |
| US20110184651A1 (en) | Electronic assay apparatus and method thereof | |
| CN111521155B (en) | Method for acquiring inclination angle of small intelligent inclination angle sensor | |
| JP3452794B2 (en) | Visibility measurement device | |
| JPS61129560A (en) | Electrostatic capacity type moisture measuring instrument | |
| IE802110L (en) | Capacitive coin detector | |
| JPH0523373B2 (en) | ||
| JPS6222951A (en) | Indoor type temperature sensor | |
| JPS617406A (en) | Defect detecting method of body shape | |
| RU2084847C1 (en) | Pressure measuring device | |
| GB2303712A (en) | Apparatus for and a method of detecting a cyclic variation of a signal | |
| JPS6148661B2 (en) | ||
| JPS60225022A (en) | Abnormality diagnostic circuit of double sensor system | |
| JPH0222707Y2 (en) | ||
| EP3875958A1 (en) | Method for obtaining information on risk of reduced respiratory function in patient with interstitial pneumonia, and use thereof | |
| JPS59122954A (en) | Automatic analyzing apparatus | |
| KR820000938Y1 (en) | A tape measure | |
| JPH045941B2 (en) | ||
| Hadberg et al. | Comparison of two immunoinhibitory methods with agarose gel-electrophoresis for measuring the MB isoenzyme of creatine kinase in serum from cases of suspected myocardial infarction | |
| SU911300A1 (en) | Method of ac polarographic analysis | |
| JPH0996555A (en) | Measuring device for storage level of storage container | |
| JPH06273380A (en) | Deterioration detector for oil | |
| JPS583200A (en) | Memory check system |