JPH07280765A - Conductivity measuring sensor - Google Patents
Conductivity measuring sensorInfo
- Publication number
- JPH07280765A JPH07280765A JP10055994A JP10055994A JPH07280765A JP H07280765 A JPH07280765 A JP H07280765A JP 10055994 A JP10055994 A JP 10055994A JP 10055994 A JP10055994 A JP 10055994A JP H07280765 A JPH07280765 A JP H07280765A
- Authority
- JP
- Japan
- Prior art keywords
- sample water
- water flow
- flow passage
- measurement
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶液の導電率、例えば
海水の塩分を算出するためのパラメータの一つである海
水の導電率を、海水に直接接触する電極間の電気抵抗値
を測定することによって導き出す電極方式の導電率測定
センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention measures the electrical conductivity of a solution, for example, the electrical conductivity of seawater, which is one of the parameters for calculating the salt content of seawater, and the electrical resistance between electrodes that are in direct contact with seawater. The present invention relates to an electrode-type conductivity measuring sensor that is derived by
【０００２】[0002]
【従来の技術】従来、溶液、例えば海水の導電率測定セ
ンサとして、図７から図１０に示すような電極方式の導
電率測定センサが使用されている。図７及び図８に示す
導電率測定センサ２１は、４極方式と呼ばれているもの
で、図７はその使用状態を示す側面図、図８は断面斜視
図である。図７及び図８において、２１ａは樹脂等の絶
縁体からなる棒状体で、同図に示すように、この棒状体
２１ａの略両端には対をなす電源電極２１ｂ、２１ｃ
が、またこの対をなす電源電極２１ｂ、２１ｃの間には
互いにＬなる間隔を隔てた状態で対をなす測定用電極２
１ｄ、２１ｅが、即ち合計４つの電極が各々棒状体２１
ａの表面に巻きつくように設けられている。なお、各電
源電極２１ｂ、２１ｃ、測定用電極２１ｄ、２１ｅは、
例えば白金黒等によって形成されている。2. Description of the Related Art Conventionally, as a conductivity measuring sensor for a solution such as seawater, an electrode type conductivity measuring sensor as shown in FIGS. 7 to 10 has been used. The conductivity measuring sensor 21 shown in FIGS. 7 and 8 is called a four-pole type, FIG. 7 is a side view showing its usage state, and FIG. 8 is a sectional perspective view. In FIGS. 7 and 8, reference numeral 21a denotes a rod-shaped body made of an insulating material such as resin. As shown in FIG.
However, between the pair of power supply electrodes 21b and 21c, the pair of measurement electrodes 2 are separated from each other by a distance L.
1d and 21e, that is, four electrodes in total
It is provided so as to be wound around the surface of a. The power supply electrodes 21b and 21c and the measurement electrodes 21d and 21e are
For example, it is formed of platinum black or the like.
【０００３】この導電率測定センサ２１は、図７に示す
ように、海水３０に浸した状態で使用される。そして、
この状態で電源電極２１ｂ、２１ｃ間に交流電源１０を
供給し、このとき海水３０を介して流れる電流Ｉを（電
流計１１によって）測定すると共に、海水３０中の一部
分、即ちここでは間隔Ｌにおける電圧降下Ｖを（電圧計
１２によって）測定することによって、間隔Ｌにおける
海水３０の抵抗値を求めることができ、ひいては海水３
０の導電率χを算出することができる。数１に、この導
電率χの算出式を示す。As shown in FIG. 7, the conductivity measuring sensor 21 is used in a state of being immersed in seawater 30. And
In this state, the AC power supply 10 is supplied between the power supply electrodes 21b and 21c, the current I flowing through the seawater 30 at this time is measured (by the ammeter 11), and a part of the seawater 30, that is, at the interval L here, is measured. By measuring the voltage drop V (by means of the voltmeter 12), the resistance value of the seawater 30 in the interval L can be determined, and thus the seawater 3
A conductivity χ of 0 can be calculated. Equation 1 shows the formula for calculating the conductivity χ.
【０００４】[0004]
【数１】χ＝Ｌ／（Ｓ・Ｒ）＝（Ｌ・Ｉ）／（Ｓ／Ｖ）[Equation 1] χ = L / (SR) = (LI) / (S / V)
【０００５】但し、数１において、Ｓは、海水３０中を
流れる電流Ｉの間隔Ｌにおける電流経路の断面積、即ち
海水３０のうち導電率χの測定対象となっている海水３
０（以下、試水という。）そのものの断面積である。図
７の場合、一般に、海水３０中を流れる電流Ｉは棒状体
２１ａの略表面を流れるとされているので、試水の断面
積Ｓは棒状体２１ａの略外周に近似する。However, in the equation 1, S is the cross-sectional area of the current path at the interval L of the current I flowing in the seawater 30, that is, the seawater 3 of the seawater 30 whose conductivity χ is to be measured.
It is the cross-sectional area of 0 (hereinafter referred to as sample water) itself. In the case of FIG. 7, generally, the current I flowing in the seawater 30 is said to flow substantially on the surface of the rod-shaped body 21a, so that the cross-sectional area S of the sample water approximates the substantially outer periphery of the rod-shaped body 21a.
【０００６】また、溶液、即ち海水３０の導電率χは、
海水３０の温度によっても変化するので、高い精度で海
水３０の導電率χを求めるためには、高い精度で海水３
０の温度測定を行う必要がある。図７に示す２７がその
温度センサで、この温度センサ２７によって測定した海
水３０の温度を基に、導電率χを算出する際の温度補正
を行っている。The conductivity χ of the solution, that is, the seawater 30, is
Since it also changes depending on the temperature of the seawater 30, in order to obtain the conductivity χ of the seawater 30 with high accuracy, the seawater 3 with high accuracy is required.
It is necessary to make a zero temperature measurement. Reference numeral 27 shown in FIG. 7 denotes the temperature sensor, which performs temperature correction when calculating the conductivity χ based on the temperature of the seawater 30 measured by the temperature sensor 27.
【０００７】なお、図７及び図８に示すように、測定用
電極２１ｄ、２１ｅの幅ｔ2 は電源電極２１ｂ、２１ｃ
の幅ｔ1 よりも狭くしてある。なぜなら、この測定用電
極２１ｄ、２１ｅに接続された電圧計１２は高入力イン
ピーダンスであるので測定用電極２１ｄ、２１ｅの電極
面を大きくする必要がないのと共に、測定用電極２１
ｄ、２１ｅの電極面が汚れることによって、結果的に間
隔Ｌが変化してしまうという影響を抑えるためである。As shown in FIGS. 7 and 8, the width t 2 of the measuring electrodes 21d and 21e is set to the power supply electrodes 21b and 21c.
The width is smaller than the width t 1 . Because the voltmeter 12 connected to the measuring electrodes 21d and 21e has a high input impedance, it is not necessary to enlarge the electrode surface of the measuring electrodes 21d and 21e, and the measuring electrode 21
This is to suppress the influence that the distance L changes as a result of the electrode surfaces of d and 21e becoming dirty.
【０００８】図９は、３極方式と呼ばれる導電率測定セ
ンサの使用状態を示す側面図である。同図に示すよう
に、この３極方式の導電率測定センサ１２１は、図７及
び図８に示す４極方式の導電率測定センサ２１で２つ設
けられていた測定用電極２１ｄ、２１ｅを１つ（図９で
は測定用電極２１ｅを）省いた構成のものである。そし
て、対をなす電源電極のうち一方の電源電極（図９では
電源電極２１ｃ）を、測定用電極として兼用するもので
ある。従って、図９に示すように、測定用電極２１ｄと
電源電極２１ｃとの間が、導電率χの測定部分となる間
隔Ｌになる。これ以外については、図７及び図８に示す
４極方式の導電率測定センサ２１と同様であり、海水の
導電率についても上記数１から算出することができる。FIG. 9 is a side view showing a usage state of a conductivity measuring sensor called a three-pole type. As shown in the figure, this three-pole type conductivity measuring sensor 121 has two measuring electrodes 21d and 21e provided in the four-pole type conductivity measuring sensor 21 shown in FIGS. One (measurement electrode 21e in FIG. 9) is omitted. One of the paired power supply electrodes (power supply electrode 21c in FIG. 9) also serves as the measurement electrode. Therefore, as shown in FIG. 9, an interval L between the measurement electrode 21d and the power supply electrode 21c is a portion for measuring the conductivity χ. Other than this, the conductivity is the same as that of the four-pole conductivity measuring sensor 21 shown in FIGS. 7 and 8, and the conductivity of seawater can also be calculated from the above mathematical expression 1.
【０００９】図１０は、２極方式と呼ばれる導電率測定
センサの使用状態を示す側面図である。同図に示すよう
に、この２極方式の導電率測定センサ２２１は、図７及
び図８に示す４極方式の導電率測定センサ２１で設けら
れていた対をなす測定用電極２１ｄ、２１ｅを両方とも
省き、対をなす電源電極２１ｂ、２１ｃを測定用電極と
して兼用したものである。従って、図１０に示すよう
に、２つの電源電極２１ｂ、２１ｃ間が、導電率χの測
定部分となる間隔Ｌになる。この他については、図７及
び図８に示す４極方式の導電率測定センサ２１と同様で
あり、海水の導電率についても上記数１から算出するこ
とができる。FIG. 10 is a side view showing a usage state of a conductivity measuring sensor called a two-pole type. As shown in the figure, this two-pole type conductivity measuring sensor 221 has the pair of measuring electrodes 21d and 21e provided in the four-pole type conductivity measuring sensor 21 shown in FIGS. Both are omitted, and the paired power supply electrodes 21b and 21c are also used as measurement electrodes. Therefore, as shown in FIG. 10, the distance L between the two power supply electrodes 21b and 21c becomes the measurement portion of the conductivity χ. The other points are the same as those of the four-pole type conductivity measuring sensor 21 shown in FIGS. 7 and 8, and the conductivity of seawater can also be calculated from the above mathematical expression 1.
【００１０】なお、図９に示す３極方式の導電率測定セ
ンサ１２１、及び図１０に示す２極方式の導電率測定セ
ンサ２２１は、図７及び図８に示す４極式の導電率測定
センサ２１に比べて、測定用電極２１ｄ、２１ｅの一方
又は両方を省いた分だけ構造が簡単であり、製造コスト
が易いという利点を有している。しかし、この利点とは
逆に、測定用電極としての兼用している電源電極２１ｂ
及び２１ｃの電極面が汚れたとき、間隔Ｌが変化してし
まうと共に、その汚れによって生じる電圧降下が電圧計
１２の測定値Ｖに影響するため、図７及び図８の４極式
の導電率測定センサ２１よりも精度が悪くなるという欠
点がある。The three-pole type conductivity measuring sensor 121 shown in FIG. 9 and the two-pole type conductivity measuring sensor 221 shown in FIG. 10 are the four-pole type conductivity measuring sensor shown in FIGS. 7 and 8. Compared with No. 21, the structure is simple and the manufacturing cost is easy because only one or both of the measurement electrodes 21d and 21e are omitted. However, contrary to this advantage, the power supply electrode 21b that also serves as a measurement electrode is used.
When the electrode surfaces of the electrodes 21 and 21c are soiled, the distance L changes and the voltage drop caused by the soiling affects the measured value V of the voltmeter 12. There is a drawback that the accuracy is worse than that of the measurement sensor 21.
【００１１】[0011]
【発明が解決しようとする課題】上述したように、上記
図７から図１０に示す従来の導電率測定センサにおいて
は、海水３０中を流れる電流Ｉは棒状体２１ａの略表面
を流れるものと定めており、棒状体２１ａの略外周に近
似した値を試水の断面積Ｓとし、これを数１に代入して
導電率χを算出している。しかし、電流Ｉは、厳密には
棒状体２１ａの表面に限らず海水３０中のあらゆる方向
に流れており、例えば図７、図９及び図１０の矢印２８
に示すような棒状態２１ａの表面から比較的離れた海水
３０中を流れる成分もあるので、実際には上記のように
試水の断面積Ｓを確定することはできない。従って、数
１によって算出された導電率χは、あくまで近似値であ
るため、高い精度の導電率χの値を得ることができない
という問題がある。As described above, in the conventional conductivity measuring sensor shown in FIGS. 7 to 10, it is determined that the current I flowing in the seawater 30 flows substantially on the surface of the rod 21a. Therefore, a value approximating the outer circumference of the rod-shaped body 21a is defined as the cross-sectional area S of the sample water, and this is substituted into Equation 1 to calculate the conductivity χ. However, strictly speaking, the current I is flowing not only on the surface of the rod-shaped body 21a but in all directions in the seawater 30, and for example, the arrow 28 in FIGS. 7, 9 and 10.
Since there is also a component that flows in the seawater 30 that is relatively far from the surface of the rod state 21a as shown in, the cross-sectional area S of the sample water cannot be actually determined as described above. Therefore, since the conductivity χ calculated by the equation 1 is just an approximate value, there is a problem that a highly accurate value of the conductivity χ cannot be obtained.
【００１２】また、上記従来技術おいては、試水の温度
を測定するための温度センサ２７は、試水の導電率χを
測定している部分、即ち間隔Ｌの部分から比較的離れた
場所に設けられている。従って、この温度センサ２７
は、導電率χの測定対象となる試水そのものの温度を測
定しているとは限らない。一方、試水そのものの温度を
測定するために、温度センサ２７を間隔Ｌ内に配置する
と、この間隔Ｌにおける導電率χが変化してしまうの
で、結果的には、この温度センサ２７を間隔Ｌ内に配置
することはできない。その上、この温度センサ２７は、
その表面が海水３０に対して開放された状態に設けられ
ているので、海水３０の流れに晒されて、この海水３０
の流れの影響をまともに受けてしまい、これによって安
定した試水の温度測定を行うことができない。つまり、
上記従来の導電率測定センサでは、試水そのものの温度
を測定することができないので、正確な温度補正を実現
することができず、結果的に高い精度で導電率χを求め
ることができないという問題がある。Further, in the above-mentioned prior art, the temperature sensor 27 for measuring the temperature of the sample water is located relatively far from the part measuring the conductivity χ of the sample water, that is, the part of the interval L. It is provided in. Therefore, this temperature sensor 27
Does not necessarily measure the temperature of the sample water itself, which is the target of measurement of the conductivity χ. On the other hand, if the temperature sensor 27 is arranged within the interval L in order to measure the temperature of the test water itself, the conductivity χ at this interval L will change, and as a result, the temperature sensor 27 will be separated by the interval L. It cannot be placed inside. Moreover, this temperature sensor 27
Since the surface of the seawater 30 is open to the seawater 30, the surface of the seawater 30 is exposed to the flow of the seawater 30.
The temperature of the sample water is affected by the flow of water, which makes stable temperature measurement of the sample water impossible. That is,
In the above-mentioned conventional conductivity measuring sensor, since the temperature of the sample water itself cannot be measured, accurate temperature correction cannot be realized, and as a result, the conductivity χ cannot be obtained with high accuracy. There is.
【００１３】本発明は、導電率χを測定する試水の断面
積を確定することによって、高い精度で導電率χを算出
することができ、また測定対象となっている試水そのも
のの温度を測定することによって、正確な温度補正を行
うことができる導電率測定センサを提供することを目的
とする。In the present invention, the conductivity χ can be calculated with high accuracy by determining the cross-sectional area of the sample water for measuring the conductivity χ, and the temperature of the sample water itself to be measured can be calculated. An object of the present invention is to provide a conductivity measuring sensor capable of performing accurate temperature correction by measuring.
【００１４】[0014]
【課題を解決するための手段】第１の発明の導電率測定
センサは、絶縁体から成り内部に試水流通路を形成する
と共に上記試水流通路の入口及び出口として上記内部に
通ずる２つの開口部を有する中空体と、電極面が上記試
水流通路内にのみ露出する状態に上記試水流通路に沿っ
て各々所定の間隔を隔てて設けた対をなす測定用電極
と、上記測定用電極の対を挟んで各々予め定めた間隔を
隔てると共に電極面が上記試水流通路にのみ露出する状
態に設けた対をなす電源電極とを具備し、上記試水流通
路の方向に対して直角な上記試水流通路の断面積が少な
くとも上記対をなす測定用電極間において一定に構成さ
れたセルを偶数個有し、上記偶数個のセルの各上記試水
流通路を各々直列に接続する接続部を備え、上記電源電
極に電源を供給したとき、上記各セル内の上記対をなす
電源電極が各々逆の極性になる状態に、かつ隣接する上
記セル間においては各々隣り合う上記電源電極の極性が
同じ極性になる状態に構成したことを特徴とするもので
ある。A conductivity measuring sensor according to a first aspect of the present invention comprises an insulator, which forms a sample water flow passage therein, and two sensors which communicate with the inside as an inlet and an outlet of the sample water flow passage. A hollow body having an opening, a pair of measuring electrodes provided at predetermined intervals along the sample water flow passage so that the electrode surface is exposed only in the sample water flow passage, and the measurement And a pair of power supply electrodes that are provided at a predetermined interval with the electrode pair sandwiched therebetween and the electrode surfaces are exposed only in the sample water flow passage, and with respect to the direction of the sample water flow passage. Has an even number of cells whose cross-sectional area of the test water flow passages that are perpendicular to each other is at least constant between at least the pair of measurement electrodes, and the test water flow passages of the even number of cells are connected in series. A power supply was supplied to the above-mentioned power supply electrode by providing a connecting portion for connection. When the pair of power supply electrodes in each cell have opposite polarities, and between the adjacent cells, the power supply electrodes adjacent to each other have the same polarity. It is a feature.
【００１５】第２の発明の導電率測定センサは、第１の
発明の導電率測定センサにおいて、上記試水流通路内に
おいて上記対をなす測定用電極間の外側に位置する上記
試水流通路内、又は上記接続部内に温度センサを設けた
ことを特徴とするものである。A conductivity measuring sensor according to a second invention is the conductivity measuring sensor according to the first invention, wherein the sample water flow passage is located outside the pair of measuring electrodes in the sample water flow passage. A temperature sensor is provided inside or inside the connection portion.
【００１６】第３の発明の導電率測定センサは、絶縁体
から成り内部に試水流通路を形成すると共に上記試水流
通路の入口及び出口として上記内部に通ずる２つの開口
部を有する中空体と、電極面が上記試水流通路内にのみ
露出する状態に設けた測定用電極と、電極面が上記試水
流通路内にのみ露出する状態に上記試水流通路に沿って
上記測定用電極から所定の間隔を隔てて設けた電源兼測
定用電極と、上記測定用電極の上記電源兼測定用電極が
位置する側とは反対側に上記電源兼測定用電極から予め
定めた間隔を隔てると共に電極面が上記試水流通路にの
み露出する状態に設けた電源電極とを具備し、上記試水
流通路の方向に対して直角な上記試水流通路の断面積が
少なくとも上記測定用電極と電源兼測定用電極との間に
おいて一定に構成されたセルを偶数個有し、上記偶数個
のセルの各上記試水流通路を各々直列に接続する接続部
を備え、上記電源兼測定用電極及び上記電源電極に電源
を供給したとき、上記各セル内の上記電源兼測定用電極
及び上記電源電極の極性が各々逆の極性になる状態に、
かつ隣接する上記セル間においては各々隣り合う上記電
源兼測定用電極又は上記電源電極が同じ極性になる状態
に構成したことを特徴とするものである。A conductivity measuring sensor according to a third aspect of the present invention is a hollow body which is made of an insulating material and forms a sample water flow passage therein, and which has two openings communicating with the inside as an inlet and an outlet of the sample water flow passage. And an electrode for measurement provided in a state where the electrode surface is exposed only in the sample water flow passage, and for measurement along the sample water flow passage in a state in which the electrode surface is exposed only in the sample water flow passage A power source / measurement electrode provided at a predetermined distance from the electrode, and a predetermined distance from the power source / measurement electrode on the opposite side of the measurement electrode from the side where the power source / measurement electrode is located. And a power electrode provided such that the electrode surface is exposed only in the sample water flow passage, and the cross-sectional area of the sample water flow passage perpendicular to the direction of the sample water flow passage is at least the measurement electrode. Between the power supply and measurement electrode And an even number of cells, each of which has a connecting portion for connecting each of the sample water flow passages of the even number of cells in series, and when the power is supplied to the power / measurement electrode and the power electrode, In the state where the polarities of the power source / measurement electrode and the power source electrode in each cell are opposite to each other,
In addition, between the adjacent cells, the adjacent power source / measurement electrode or the power source electrode has the same polarity.
【００１７】第４の発明の導電率測定センサは、第３の
発明の導電率測定センサにおいて、上記試水流通路内に
おいて上記セル毎の上記測定用電極と電源兼測定用電極
間の外側に位置する上記試水流通路内、又は上記接続部
内に温度センサを設けたことを特徴とするものである。A conductivity measuring sensor according to a fourth aspect of the present invention is the conductivity measuring sensor according to the third aspect, wherein the conductivity measuring sensor is provided outside the measurement electrode and the power source / measurement electrode of each cell in the sample water flow passage. It is characterized in that a temperature sensor is provided in the sample water flow passage located therein or in the connection portion.
【００１８】第５の発明の導電率測定センサは、絶縁体
から成り内部に試水流通路を形成すると共に上記試水流
通路の入口及び出口として上記内部に通ずる２つの開口
部を有する中空体と、電極面が上記試水流通路内にのみ
露出する状態に上記試水流通路に沿って各々所定の間隔
を隔てて設けた対をなす電源兼測定用電極とを具備し、
上記試水流通路の方向に対して直角な上記試水流通路の
断面積が上記対をなす電源兼測定用電極間において一定
に構成されたセルを偶数個有し、上記偶数個のセルの各
上記試水流通路を各々直列に接続する接続部を備え、上
記電源兼測定用電極に電源を供給したとき、上記各セル
内の上記対をなす電源兼測定用電極が各々逆の極性にな
る状態に、かつ隣接する上記セル間においては各々隣り
合う上記電源兼測定用電極の極性が同じ極性になる状態
に構成したことを特徴とするものである。A conductivity measuring sensor according to a fifth aspect of the present invention is a hollow body which is made of an insulating material and has a sample water flow passage formed therein and has two openings communicating with the inside as an inlet and an outlet of the sample water flow passage. And a pair of power supply and measurement electrodes provided at predetermined intervals along the sample water flow passage in a state where the electrode surface is exposed only in the sample water flow passage,
The cross-sectional area of the sample water flow path perpendicular to the direction of the sample water flow path has an even number of cells that are uniformly configured between the pair of power source / measurement electrodes, and the even number of cells Each of the sample water flow passages is provided with a connecting portion that is connected in series, and when power is supplied to the power supply / measurement electrode, the pair of power supply / measurement electrodes in each cell have opposite polarities. In this state, and between the adjacent cells, the polarities of the adjacent power supply / measurement electrodes are the same.
【００１９】第６の発明の導電率測定センサは、第５の
発明の導電率測定センサにおいて、上記試水流通路内に
おいて上記セル毎の上記対をなす電源兼測定用電極間の
外側に位置する上記試水流通路内、又は上記接続部内に
温度センサを設けたことを特徴とするものである。A conductivity measuring sensor according to a sixth aspect of the present invention is the conductivity measuring sensor according to the fifth aspect, wherein the conductivity measuring sensor is located outside the pair of power source / measurement electrodes for each cell in the sample water flow passage. The temperature sensor is provided in the sample water flow passage or the connection portion.
【００２０】[0020]
【作用】第１の発明によれば、各セルは、中空体と、対
をなす電源電極と、対をなす測定用電極とによって、４
極方式の導電率測定センサを構成しており、各電極の電
極面は中空体の内部に形成された試水流通路内を通る試
水にのみ接触する。そして、偶数個のセルの各試水流通
路は直列の状態で１本に接続されており、各セルの各電
源電極に電源を供給したとき、各セル毎の対をなす電源
電極は各々逆の極性になり、また隣接するセル間の隣り
合う電源電極は各々同じ極性になる。つまり、電源を供
給することによって流れる電流は各セル毎の電源電極間
にのみ流れ、また、１本に接続された試水流通路全体の
入口側及び出口側に位置する電源電極は必然的に同じ極
性になるので、この試水流通路全体の入口側及び出口側
に位置する電源電極間に電流は流れない。その上、導電
率の測定部分となる上記対をなす測定用電極間における
試水流通路の断面積は一定である。従って、各セル毎に
おける電流経路の断面積、即ち試水そのものの断面積が
確定される。According to the first aspect of the invention, each cell is composed of a hollow body, a pair of power supply electrodes, and a pair of measurement electrodes.
The electrode-type conductivity measuring sensor is configured so that the electrode surface of each electrode comes into contact with only the sample water passing through the sample water flow passage formed inside the hollow body. Each sample water flow passage of an even number of cells is connected in series in one line, and when power is supplied to each power supply electrode of each cell, the power supply electrodes forming a pair for each cell are reversed. And adjacent power supply electrodes between adjacent cells have the same polarity. That is, the current flowing by supplying the power flows only between the power supply electrodes of each cell, and the power supply electrodes located at the inlet side and the outlet side of the entire test water flow passage connected to one cell are inevitably inevitable. Since the polarities are the same, no current flows between the power supply electrodes located on the inlet side and the outlet side of the entire test water flow passage. Moreover, the cross-sectional area of the sample water flow passage between the pair of measurement electrodes, which is a portion for measuring the conductivity, is constant. Therefore, the cross-sectional area of the current path in each cell, that is, the cross-sectional area of the sample water itself is determined.
【００２１】第２の発明によれば、第１の発明の導電率
測定センサにおいて、各セル毎の対をなす測定用電極間
以外の試水流通路内、又は接続部内に温度センサを設け
ているので、試水流通路内を通る試水そのものの温度を
測定することができる。According to the second invention, in the conductivity measuring sensor of the first invention, a temperature sensor is provided in the sample water flow passage other than between the pair of measuring electrodes for each cell, or in the connecting portion. Therefore, the temperature of the sample water itself passing through the sample water flow passage can be measured.
【００２２】第３の発明によれば、各セルは、中空体
と、電源電極と、電源兼測定用電極と、測定用電極とに
よって、３極方式の導電率測定センサを構成しており、
各電極の電極面は中空体の内部に形成された試水流通路
内を通る試水にのみ接触する。そして、偶数個のセルの
各試水流通路は直列の状態で１本に接続されており、各
セルの各電源電極及び電源兼測定用電極に電源を供給し
たとき、各セル毎の電源電極及び電源兼測定用電極は各
々逆の極性になり、また隣接するセル間の隣り合う電源
電極又は電源兼測定用電極は各々同じ極性になる。つま
り、電源を供給することによって流れる電流は各セル毎
の電源電極と電源兼測定用電極間にのみ流れ、また、１
本に接続された試水流通路全体の入口側及び出口側に位
置する電源電極又は電源兼測定用電極は必然的に同じ極
性になるので、この試水流通路全体の入口側及び出口側
に位置する電極間に電流は流れない。その上、導電率の
測定部分である電源兼測定用電極と測定用電極間におけ
る試水流通路の断面積は一定である。従って、各セル毎
における電流経路の断面積、即ち試水そのものの断面積
が確定される。According to the third aspect of the invention, each cell constitutes a three-pole type conductivity measuring sensor by the hollow body, the power source electrode, the power source / measurement electrode, and the measurement electrode.
The electrode surface of each electrode contacts only the sample water passing through the sample water flow passage formed inside the hollow body. Each sample water flow passage of an even number of cells is connected in series in one line, and when power is supplied to each power supply electrode and power supply / measurement electrode of each cell, the power supply electrode of each cell is connected. The power supply and measurement electrodes have opposite polarities, and the adjacent power supply electrodes or power supply and measurement electrodes between adjacent cells have the same polarity. That is, the current flowing by supplying the power flows only between the power electrode and the power / measurement electrode of each cell, and
Since the power source electrodes or power source / measurement electrodes located on the inlet side and outlet side of the entire test water flow passage connected to the book inevitably have the same polarity, there are No current flows between the positioned electrodes. In addition, the cross-sectional area of the sample water flow passage between the measurement electrode and the power source / measurement electrode, which is the portion for measuring the conductivity, is constant. Therefore, the cross-sectional area of the current path in each cell, that is, the cross-sectional area of the sample water itself is determined.
【００２３】第４の発明によれば、第３の発明の導電率
測定センサにおいて、各セル毎の測定用電極と電源兼測
定用電極との間以外の試水流通路内、又は接続部内に温
度センサを設けているので、試水流通路内を通る試水そ
のものの温度を測定することができる。According to the fourth aspect of the invention, in the conductivity measuring sensor of the third aspect, in the test water flow passage other than between the measurement electrode and the power source / measurement electrode of each cell, or in the connection part. Since the temperature sensor is provided, the temperature of the sample water itself passing through the sample water flow passage can be measured.
【００２４】第５の発明によれば、各セルは、中空体
と、対をなす電源兼測定用電極とによって、２極方式の
導電率測定センサを構成しており、各電源兼測定用電極
の電極面は中空体の内部に形成された試水流通路内を通
る試水にのみ接触する。そして、偶数個のセルの各試水
流通路は直列の状態で１本に接続されており、各セルの
各電源兼測定用電極に電源を供給したとき、各セル毎の
対をなす電源兼測定用電極は各々逆の極性になり、また
隣接するセル間の隣り合う電源兼測定用電極は各々同じ
極性になる。つまり、電源を供給することによって流れ
る電流は各セル毎の電源兼測定用電極間にのみ流れ、ま
た、１本に接続された試水流通路全体の入口側及び出口
側に位置する電源兼測定用電極は必然的に同じ極性にな
るので、この試水流通路全体の入口側及び出口側に位置
する電源兼測定用電極に電流は流れない。その上、導電
率の測定部分である対をなす電源兼測定用電極間におけ
る試水流通路の断面積は一定である。従って、各セル毎
における電流経路の断面積、即ち試水そのものの断面積
が確定される。According to the fifth aspect of the invention, each cell constitutes a conductivity measuring sensor of the two-pole type by the hollow body and the paired power source / measurement electrode. The electrode surface of (1) contacts only the sample water passing through the sample water flow passage formed inside the hollow body. Each sample water flow passage of an even number of cells is connected in series in one line, and when power is supplied to each power source / measurement electrode of each cell, it also serves as a pair of power source / cell for each cell. The measurement electrodes have opposite polarities, and the adjacent power supply / measurement electrodes between adjacent cells have the same polarity. In other words, the current that flows when the power is supplied flows only between the power / measurement electrodes of each cell, and the power / measurement located on the inlet and outlet sides of the entire sample water flow passage connected to one cell. Since the working electrodes inevitably have the same polarity, no current flows through the power supply / measuring electrodes located on the inlet side and the outlet side of the entire test water flow passage. Moreover, the cross-sectional area of the sample water flow passage between the pair of power source / measuring electrodes, which is a portion for measuring conductivity, is constant. Therefore, the cross-sectional area of the current path in each cell, that is, the cross-sectional area of the sample water itself is determined.
【００２５】第６の発明によれば、第５の発明の導電率
測定センサにおいて、各セル毎の対をなす電源兼測定用
電極間以外の試水流通路内、又は接続部内に温度センサ
を設けているので、試水流通路内を通る試水そのものの
温度を測定することができる。According to the sixth invention, in the conductivity measuring sensor of the fifth invention, a temperature sensor is provided in the test water flow passage other than between the pair of power source / measuring electrodes for each cell, or in the connecting portion. Since it is provided, the temperature of the sample water itself passing through the sample water flow passage can be measured.
【００２６】[0026]
【実施例】本第１の発明に係る導電率測定センサの第１
実施例を図１から図３を参照して説明する。図１は、こ
の導電率測定センサの使用状態を示す断面図で、同図に
おける１、２を測定管と呼ぶ。この測定管１、２は、同
じ構造から成り、これらの構造を示す測定管１の断面斜
視図を図２に示す。[First Embodiment] A first conductivity measuring sensor according to the first invention.
An embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a cross-sectional view showing a usage state of this conductivity measuring sensor, and reference numerals 1 and 2 in FIG. 1 are called measuring tubes. The measuring tubes 1 and 2 have the same structure, and a sectional perspective view of the measuring tube 1 showing these structures is shown in FIG.
【００２７】図２において、この測定管１を構成してい
る１ａ、１ａ、・・・は外径Ｄ及び内径ｄの円筒形から
成る絶縁体で形成された絶縁管、１ｂ、１ｃは外径Ｄ及
び内径ｄの環状形を有する電源電極、１ｄ、１ｅは外径
Ｄ及び内径ｄの環状形を有する測定用電極である。そし
て、同図に示すように、この測定管１は、その両端に電
源電極１ｂ、１ｃが位置するように、また略中央に測定
用電極１ｄ、１ｅが各々Ｌなる間隔を隔てて位置するよ
うに、各電極間に絶縁管１ａ、１ａ、・・・を介在させ
たサンドイッチ構造とすることによって、外径Ｄ及び内
径ｄから成る中空円柱を形成している。つまり、この測
定管１は、図８に示す従来の導電率測定センサの内部を
くり抜いたような形状をしており、このくり抜かれた内
部１ｆにも電源電極１ｂ、１ｃ、及び測定用電極１ｄ、
１ｅの各電極面が露出するように構成すると共に、これ
らの４つの電極を有する４極方式の導電率測定センサを
形成している。なお、本実施例においては、絶縁管１
ａ、１ａ、・・・はセラミック、電源電極１ｂ、１ｃ、
及び測定用電極１ｄ、１ｅは各々カーボンで形成されて
いる。また、測定管１及び２の外径Ｄは約８ｍｍ、内径
ｄは約４ｍｍ、間隔Ｌは約１８ｍｍとしている。そし
て、上記のとおり、この測定管１と測定管２とは同じ構
造を有している。In FIG. 2, reference numerals 1a, 1a, ... Constituting the measuring pipe 1 are insulating pipes made of a cylindrical insulator having an outer diameter D and an inner diameter d, and 1b and 1c are outer diameters. Power electrodes 1d and 1e having an annular shape of D and inner diameter d are measuring electrodes having an annular shape of outer diameter D and inner diameter d. As shown in the figure, the measuring tube 1 is arranged such that the power supply electrodes 1b and 1c are located at both ends thereof, and the measuring electrodes 1d and 1e are located at substantially L centers with an interval of L. In addition, a hollow cylinder having an outer diameter D and an inner diameter d is formed by forming a sandwich structure in which insulating tubes 1a, 1a, ... Are interposed between the electrodes. That is, the measuring tube 1 has a shape like the inside of the conventional conductivity measuring sensor shown in FIG. 8, and the power source electrodes 1b, 1c and the measuring electrode 1d are also included in the hollowed inside 1f. ,
The electrode surface of 1e is configured to be exposed, and a four-pole type conductivity measurement sensor having these four electrodes is formed. In this embodiment, the insulating tube 1
a, 1a, ... Are ceramics, power supply electrodes 1b, 1c,
The measurement electrodes 1d and 1e are each made of carbon. The outer diameter D of the measuring tubes 1 and 2 is about 8 mm, the inner diameter d is about 4 mm, and the interval L is about 18 mm. Then, as described above, the measuring pipe 1 and the measuring pipe 2 have the same structure.
【００２８】この測定管１、２は、図１に示すように、
例えば樹脂など絶縁体によって形成された絶縁カバー３
及び絶縁部材４、５によって、各電極が測定管１及び２
の内部１ｆ及び２ｆ以外の空間に露出しないようにモー
ルドされている。そして、測定管１の内部１ｆの電源電
極１ｂ側は絶縁部材４の開口部４ａと連続しており、測
定管２の内部２ｆの電源電極２ｂ側は絶縁部材５の開口
部５ａと連続している。また、測定管１の内部１ｆの電
源電極１ｃ側と測定管２の内部２ｆの電源電極２ｆ側と
は、絶縁カバー３によって相互に接続されている。従っ
て、絶縁部材４及び５の開口部４ａ及び５ａに連続して
いる測定管１及び２の各内部１ｆ及び２ｆは、絶縁カバ
ー３によって形成された空間３ａを介してＵ字状に直列
状態で接続されている。更に、この絶縁カバー３の空間
３ａ部分には、温度センサ７が設けられている。また、
絶縁管１の電源電極１ｃと測定管２の電源電極２ｃと
は、短絡線６によって導通状態になっている。The measuring tubes 1 and 2 are, as shown in FIG.
Insulation cover 3 formed of an insulator such as resin
And the insulating members 4 and 5 allow the electrodes to be connected to the measuring tubes 1 and 2 respectively.
It is molded so as not to be exposed in a space other than the interiors 1f and 2f. The power supply electrode 1b side of the inside 1f of the measuring tube 1 is continuous with the opening 4a of the insulating member 4, and the power supply electrode 2b side of the inside 2f of the measuring tube 2 is continuous with the opening 5a of the insulating member 5. There is. Further, the power supply electrode 1c side of the inside 1f of the measuring tube 1 and the power supply electrode 2f side of the inside 2f of the measuring tube 2 are connected to each other by an insulating cover 3. Therefore, the insides 1f and 2f of the measuring tubes 1 and 2 which are continuous with the openings 4a and 5a of the insulating members 4 and 5 are connected in a U-shape in a serial state via the space 3a formed by the insulating cover 3. It is connected. Further, a temperature sensor 7 is provided in the space 3a of the insulating cover 3. Also,
The power supply electrode 1c of the insulating tube 1 and the power supply electrode 2c of the measuring tube 2 are electrically connected by the short-circuit wire 6.
【００２９】なお、絶縁管１ａ及び２ａと、絶縁カバー
３と、絶縁部材４及び５とが、請求項に記載の中空体に
対応する。また、測定管１及び２と、絶縁カバー３と、
絶縁部材４及び５とによって、請求項に記載のセルに対
応するものが２つ形成される。そして、測定管１及び２
の各内部１ｆ及び２ｆを絶縁カバー３によって接続され
た部分が、請求項に記載の接続部に対応する。The insulating tubes 1a and 2a, the insulating cover 3, and the insulating members 4 and 5 correspond to the hollow body described in the claims. Also, the measuring tubes 1 and 2, the insulating cover 3,
The insulating members 4 and 5 form two members corresponding to the cells described in the claims. And measuring tubes 1 and 2
A portion in which each of the insides 1f and 2f is connected by the insulating cover 3 corresponds to the connecting portion described in the claims.
【００３０】次に、この導電率測定センサの作用につい
て説明する。図１において、絶縁部材４の開口部４ａか
ら海水、即ち試水を例えばポンプ装置等の強制循環装置
（図示せず）によって供給する。この供給された試水
は、測定管１の内部１ｆと空間３ａと測定管２の内部２
ａとを介して、絶縁部材５の開口部５ａから排出され
る。つまり、測定管１の内部１ｆと空間３ａと測定管２
の内部２ａとによって、絶縁部材４及び５の開口部４ａ
及び５ａを各々試水吸入口及び試水排出口とする試水流
通路８が形成される。Next, the operation of this conductivity measuring sensor will be described. In FIG. 1, seawater, that is, sample water is supplied from the opening 4a of the insulating member 4 by a forced circulation device (not shown) such as a pump device. The supplied sample water is used for measuring the inside 1f of the measuring pipe 1, the space 3a, and the inside 2 of the measuring pipe 2.
It is discharged from the opening 5a of the insulating member 5 via a. That is, the inside 1f of the measuring tube 1, the space 3a, and the measuring tube 2
The interior 2a of the insulating member 4 and the opening 4a of the insulating member 4
5 and 5a are formed as sample water inlets and sample water outlets, respectively.
【００３１】そして、図１に示す状態で測定管１の電源
電極１ｂ、１ｃ間、及び測定管２の電源電極２ｂ、２ｃ
間に、例えば周波数が１０ｋHz程の交流電源１０を各々
供給する。ここで、この交流電源１０は、電源電極１ｂ
に対しては電流計１１を介して供給され、また電源電極
２ｂに対しては電流計１１ｇを介して供給される。そし
て、各電流計１１、１１ａの入力インピーダンスは略０
に等しいので、電源電極１ｂと２ｂとは略導通状態にな
る。従って、電源電極１ｂと２ｂ、及び電源電極１ｃと
２ｃとは各々同電位（同極）になり、これによって、こ
れらの電源電極１ｂと２ｂ間、電源電極１ｃと２ｃ間
に、電流が流れることはない。つまり、２つの測定管１
及び２間を相互に流れ込む電流はないので、電源電極１
ｃ及び１ｄ間に流れる電流Ｉ1 は、測定管１の内部１ｆ
にある試水のみを流れ、また電源電極２ｃ及び２ｄ間に
流れる電流Ｉ2 は、測定管２の内部２ｆにある試水のみ
を流れる。また、各電流Ｉ1 及びＩ2 が流れる試水の断
面積Ｓは、各測定管１及び２の内部１ｆ及び２ｆの断面
積、即ち直径ｄなる円の面積である。従って、この試水
の断面積Ｓを流れる電流Ｉ1 及びＩ2 を（電流計１１及
び１１ｇによって）測定すると共に、試水の一部分、即
ち間隔Ｌにおける電圧降下Ｖ1 及びＶ2 を（電圧計１２
及び１２ｇによって）測定することによって、間隔Ｌに
おける試水の抵抗値Ｒを求めることができ、従来と同様
に、数１から試水の導電率χを算出することができる。Then, in the state shown in FIG. 1, between the power supply electrodes 1b and 1c of the measuring tube 1 and between the power supply electrodes 2b and 2c of the measuring tube 2.
In the meantime, for example, the AC power supplies 10 having a frequency of about 10 kHz are supplied. Here, this AC power supply 10 is provided with a power supply electrode 1b.
To the power electrode 2b via the ammeter 11g. The input impedance of each ammeter 11, 11a is approximately 0.
Therefore, the power supply electrodes 1b and 2b are brought into a substantially conductive state. Therefore, the power supply electrodes 1b and 2b and the power supply electrodes 1c and 2c have the same potential (same polarity), which allows current to flow between the power supply electrodes 1b and 2b and between the power supply electrodes 1c and 2c. There is no. That is, two measuring tubes 1
Since there is no current that flows between each other, the power electrode 1
The current I 1 flowing between c and 1d is 1f inside the measuring tube 1.
The current I 2 flowing only in the sample water inside the measuring tube 2 flows between the power supply electrodes 2c and 2d. The cross-sectional area S of the sample water through which the currents I 1 and I 2 flow is the cross-sectional area of the insides 1f and 2f of the measuring tubes 1 and 2, that is, the area of the circle having the diameter d. Therefore, the currents I 1 and I 2 flowing through the cross-sectional area S of this sample water are measured (by ammeters 11 and 11 g), and the voltage drops V 1 and V 2 in a part of the sample water, that is, the interval L (voltmeter) are measured. 12
And 12 g), the resistance value R of the sample water in the interval L can be obtained, and the conductivity χ of the sample water can be calculated from Equation 1 as in the conventional case.
【００３２】また、試水流通路８を流れる試水の温度
は、試水流通路８の一部を形成している空間３ａに設け
られている温度センサ７によって測定される。従って、
この温度センサ７は、試水そのものの温度を測定するこ
とができる。The temperature of the sample water flowing through the sample water flow passage 8 is measured by a temperature sensor 7 provided in the space 3a forming a part of the sample water flow passage 8. Therefore,
The temperature sensor 7 can measure the temperature of the test water itself.
【００３３】なお、図８に示す従来の４極方式の導電率
測定センサ２１と同様に、測定用電極１ｄ、１ｅの幅ｔ
2 は、電極面の汚れによる影響を抑えるために、図２に
示すように、電源電極１ｂ、１ｃの幅ｔ1 よりも狭くし
てある。Note that the width t of the measuring electrodes 1d and 1e is the same as that of the conventional four-pole type conductivity measuring sensor 21 shown in FIG.
In order to suppress the influence of the dirt on the electrode surface, 2 is made narrower than the width t 1 of the power supply electrodes 1b and 1c as shown in FIG.
【００３４】上記のように、この導電率測定センサは、
図１に示す状態で測定管１の電源電極１ｂ、１ｃ間、及
び測定管２の電源電極２ｂ、２ｃ間に各々交流電源１０
を供給すると、電源電極１ｂと２ｂとが同電位（同極）
になり、電源電極１ｃと２ｃとが同電位（同極）にな
る。従って、電源電極１ｃ及び１ｄ間に流れる電流Ｉ1
は、測定管１の内部１ｆにある試水のみを流れ、また電
源電極２ｃ及び２ｄ間に流れる電流Ｉ2 は、測定管２の
内部２ｆにある試水のみを流れ、電源電極１ｂ及び２ｂ
間、電源電極１ｃ及び２ｃ間で相互に電流が流れ込むこ
とはない。また、各電流Ｉ1 及びＩ2 が流れる試水の断
面積Ｓは、試水流通路８の方向に沿って一定である。従
って、導電率χを数１によって算出する際、電流Ｉ1 及
びＩ2 の電流経路の断面積、即ち試水の断面積Ｓが確定
されるため、数１に示す算出式を確実に成立させること
ができる。よって、図７に示す従来の４極方式の導電率
測定センサ２１よりも、高い測定精度を実現することが
できる。As mentioned above, this conductivity measuring sensor
In the state shown in FIG. 1, an AC power supply 10 is provided between the power supply electrodes 1b and 1c of the measuring tube 1 and between the power supply electrodes 2b and 2c of the measuring tube 2.
Is supplied, the power supply electrodes 1b and 2b have the same potential (same polarity).
Then, the power supply electrodes 1c and 2c have the same potential (same polarity). Therefore, the current I 1 flowing between the power supply electrodes 1c and 1d
Flows only the sample water in the inside 1f of the measuring tube 1, and the current I 2 flowing between the power supply electrodes 2c and 2d flows only the sample water in the inside 2f of the measuring tube 2 and the power supply electrodes 1b and 2b.
During this time, no current flows between the power supply electrodes 1c and 2c. The cross-sectional area S of the sample water through which the respective currents I 1 and I 2 flow is constant along the direction of the sample water flow passage 8. Therefore, when the conductivity χ is calculated by the mathematical formula 1, the cross-sectional area of the current paths of the currents I 1 and I 2 , that is, the cross-sectional area S of the sample water is determined, so that the calculation formula shown in the mathematical formula 1 is surely established. be able to. Therefore, it is possible to realize higher measurement accuracy than that of the conventional four-pole type conductivity measurement sensor 21 shown in FIG. 7.
【００３５】更に、この導電率測定センサからは、測定
管１及び２から２つの測定結果を得ることができるの
で、これらの測定結果の平均を取るなどの処理を行うこ
とによって、従来の４極方式の導電率測定センサよりも
高い測定精度を得ることができる。Furthermore, since two measurement results can be obtained from the measuring tubes 1 and 2 from this conductivity measuring sensor, by performing processing such as taking an average of these measurement results, the conventional four poles can be obtained. It is possible to obtain a higher measurement accuracy than the conductivity measurement sensor of the type.
【００３６】そして、この導電率測定センサでは、温度
センサ７が試水の温度そのものを測定できるように構成
されているので、図７に示す従来の４極方式の導電率測
定センサよりも正確な温度補正を実現することができ、
これによって、高い精度で試水の導電率を求めることが
できる。In this conductivity measuring sensor, since the temperature sensor 7 can measure the temperature of the sample water itself, it is more accurate than the conventional 4-pole conductivity measuring sensor shown in FIG. Temperature compensation can be realized,
Thereby, the conductivity of the sample water can be obtained with high accuracy.
【００３７】なお、図１に示す導電率測定センサでは、
測定管１及び２をＵ字状に接続したが、Ｕ字状の接続に
限らず、例えば図３に示すような直線状態、即ちＩ字状
に接続してもよい。同図に示すように、これらの２つの
測定管１及び２の各内部１ｆ及び２ｆを、絶縁カバー２
３によって形成された空間２３ａを介してＩ字状に直列
接続することによって、試水流通路８ａは、試水吸入口
となる絶縁部材４の開口部４ａから試水排出口となる絶
縁部材５の開口部５ａまで真っ直ぐな直線の状態に形成
される。従って、ポンプ装置等の強制循環装置を使用す
ることなく、自然水流によって試水流通路８ａ内に試水
を供給することができる。もちろん、これらの測定管１
及び２の各内部１ｆ及び２ｆが直列状態で接続されてい
れば、Ｕ字状やＩ字状に限らず、例えばＬ字状等の他の
形状状態で接続してもよいことは言うまでもない。In the conductivity measuring sensor shown in FIG.
Although the measuring tubes 1 and 2 are connected in a U-shape, the connection is not limited to the U-shape, but may be connected in a linear state as shown in FIG. 3, that is, in an I-shape. As shown in the figure, the insides 1f and 2f of these two measuring tubes 1 and 2 are connected to the insulating cover 2
By connecting in series in an I-shape through the space 23a formed by 3, the sample water flow passage 8a is formed from the opening 4a of the insulating member 4 serving as the sample water intake port to the insulating member 5 serving as the sample water discharge port. The opening 5a is formed in a straight line. Therefore, the sample water can be supplied into the sample water passage 8a by the natural water flow without using a forced circulation device such as a pump device. Of course, these measuring tubes 1
It is needless to say that as long as the interiors 1f and 2f of 2 and 2 are connected in series, they may be connected not only in the U-shape or the I-shape but also in other shape such as L-shape.
【００３８】また、本実施例では、絶縁管を１及び２の
２本の構成としたが、偶数であれば４本以上でもよい。
そして、絶縁管１ａ、１ａ、・・・をセラミックによっ
て形成したが、比較的に耐圧性が高く、また温度変化に
強い絶縁体であれば、例えば硬質ガラスや石英ガラス等
の材料によって形成してもよい。更に、電源電極１ｂ、
１ｃ、及び測定用電極１ｄ、１ｅを各々カーボンで形成
したが、金や白金、白金黒等の材料によって形成しても
よい。また、測定管１の電源電極１ｃと測定管２の電源
電極２ｃとを、短絡線６によって導通させたが、例えば
絶縁カバー３の空間３ａ部分の内壁３ｂに導体を塗布
し、この導体を介して電源電極１ｃ、２ｃの導通を取る
構成にしてもよい。そして、測定管１及び２は中空円柱
の形状としたが、円柱に限らず、三角、多角などの角柱
の形状にしてもよい。また、内部１ｆ及び２ｆについて
も、その試水流通路８に対して直角な断面の形状を円形
としたが、円形に限らず角形等の形状にしてもよい。ま
た、各測定管１及び２の内部１ｆ及び２ｆの試水流通路
８に対して直角な断面積は、少なくとも測定用電極１
ｄ、１ｅ間、及び２ｄ、２ｅ間において一定であればよ
い。そして、各電源電極１ｂ、１ｃ、２ｂ、２ｃに供給
する電源を交流電源１０としたが、直流電源を供給して
もよい。Further, in this embodiment, the insulating tube has the two constitutions of 1 and 2, but if it is an even number, it may be four or more.
The insulating tubes 1a, 1a, ... Are made of ceramics, but if they are insulators having relatively high pressure resistance and resistance to temperature change, they are made of materials such as hard glass and quartz glass. Good. Furthermore, the power electrode 1b,
Although 1c and the measuring electrodes 1d and 1e are made of carbon, they may be made of a material such as gold, platinum, or platinum black. Further, the power supply electrode 1c of the measuring tube 1 and the power supply electrode 2c of the measuring tube 2 are electrically connected by the short-circuit wire 6. For example, a conductor is applied to the inner wall 3b of the space 3a of the insulating cover 3 and the conductor is interposed. Alternatively, the power electrodes 1c and 2c may be electrically connected. Although the measuring tubes 1 and 2 have the shape of a hollow cylinder, they are not limited to a cylinder and may have a shape of a prism such as a triangle or a polygon. Also, regarding the insides 1f and 2f, the shape of the cross section perpendicular to the sample water flow passage 8 is circular, but the shape is not limited to circular, and may be rectangular or the like. Further, the cross-sectional area of the insides 1f and 2f of the respective measuring tubes 1 and 2 perpendicular to the sample water flow passage 8 is at least the measurement electrode 1
It may be constant between d and 1e and between 2d and 2e. Although the AC power supply 10 is used as the power supply to each power supply electrode 1b, 1c, 2b, 2c, a DC power supply may be supplied.
【００３９】図４は、本発明に係る導電率測定センサの
第２実施例を示す断面図で、図１に示す第１実施例の導
電率測定センサを少し変形させたものである。この図４
に示す第２実施例の導電率測定センサと図１に示す第１
実施例との異なるところは、図１の第１実施例では、電
源電極１ｂ、１ｃ、２ｂ、２ｃの電極面を試水流通路８
を流れる試水の向きに平行になるように設けていたが、
図４の導電率測定センサでは、各電源電極１１ｂ、１１
ｃ、１２ｂ、１２ｃの電極面を試水流通路１８を流れる
試水の向きに直角になるように設けたところである。従
って、これに伴い、図４に示す導電率測定センサでは、
測定管１１及び１２の側面に内部１１ｆ及び１２ｆの開
口部分が設けられており、絶縁カバー１３の形状や、絶
縁部材１４及び１５の位置についてもこれに併せて図１
とは変えている。これ以外については、図１に示す第１
実施例の導電率測定センサと同等であり、同等部分には
同一符号を付して、その詳細を省略する。FIG. 4 is a sectional view showing a second embodiment of the conductivity measuring sensor according to the present invention, which is a modification of the conductivity measuring sensor of the first embodiment shown in FIG. This Figure 4
The conductivity measuring sensor of the second embodiment shown in FIG.
The difference from the embodiment is that in the first embodiment of FIG. 1, the electrode surfaces of the power supply electrodes 1b, 1c, 2b and 2c are connected to the sample water flow passage 8.
It was installed so as to be parallel to the direction of the test water flowing through
In the conductivity measuring sensor of FIG. 4, the power supply electrodes 11b, 11
The electrode surfaces of c, 12b, and 12c are provided so as to be perpendicular to the direction of the sample water flowing in the sample water flow passage 18. Therefore, along with this, in the conductivity measuring sensor shown in FIG.
The opening portions of the inner portions 11f and 12f are provided on the side surfaces of the measuring tubes 11 and 12, and the shape of the insulating cover 13 and the positions of the insulating members 14 and 15 are also shown in FIG.
Is changing. Other than this, the first shown in FIG.
It is the same as the conductivity measuring sensor of the embodiment, and the same reference numerals are given to the same portions and the details thereof will be omitted.
【００４０】この導電率測定センサでは、上記のよう
に、各電源電極１１ｂ、１１ｃ、１２ｂ、１２ｃの電極
面を、試水流通路１８を流れる試水の向きに直角になる
ように設けているので、試水流通路１８を流れる試水の
断面上における電流強度の分布を一様にすることができ
る。また、測定管１１及び１２の側面に内部１１ｆ及び
１２ｆの開口部分を設けているので、測定管１１及び１
２の長さに対して、導電率測定センサ全体の長さを、図
１に示す第１実施例の導電率測定センサよりも短くする
ことができる。In this conductivity measuring sensor, as described above, the electrode surfaces of the power supply electrodes 11b, 11c, 12b, 12c are provided so as to be perpendicular to the direction of the sample water flowing through the sample water flow passage 18. Therefore, the distribution of the current intensity on the cross section of the sample water flowing through the sample water flow passage 18 can be made uniform. Further, since the inner pipes 11f and 12f are provided with openings on the side surfaces of the measuring pipes 11 and 12, the measuring pipes 11 and 1 are
For the length of 2, the entire length of the conductivity measuring sensor can be made shorter than that of the conductivity measuring sensor of the first embodiment shown in FIG.
【００４１】図５は、本発明に係る導電率測定センサの
第３実施例を示す断面図である。同図に示すように、こ
の導電率測定センサは、図１に示す第１実施例の導電率
測定センサにおいて、測定管１及び２に各々２つずつ設
けられていた測定用電極１ｄ、１ｅ、及び２ｄ、２ｅ
を、各々１つずつ（図５では測定用電極１ｅ及び２ｅ
を）省いた構成のものである。そして、測定管１及び２
の各２つの電源電極のうち一方の電源電極（図５では電
源電極１１ｃ及び１２ｃ）を、測定用電極として兼用す
るものである。従って、図１に示す第１実施例では、測
定管１及び２が、各々４極方式の導電率測定センサを形
成していたが、この図５に示す導電率測定センサでは、
各測定管１１及び１２が、各々３極方式の導電率測定セ
ンサを形成している。なお、これ以外の構造について
は、図１に示す第１実施例の導電率測定センサと同等で
あり、同等部分には同一符号を付して、その詳細を省略
する。FIG. 5 is a sectional view showing a third embodiment of the conductivity measuring sensor according to the present invention. As shown in the figure, this conductivity measuring sensor is the same as the conductivity measuring sensor of the first embodiment shown in FIG. 1, but two measuring electrodes 1d and 1e are provided in each of the measuring tubes 1 and 2. And 2d, 2e
, One each (in FIG. 5, measurement electrodes 1e and 2e)
() Is omitted. And measuring tubes 1 and 2
One of the two power supply electrodes (power supply electrodes 11c and 12c in FIG. 5) is also used as the measurement electrode. Therefore, in the first embodiment shown in FIG. 1, the measuring tubes 1 and 2 each form a four-pole type conductivity measuring sensor, but in the conductivity measuring sensor shown in FIG.
Each measuring tube 11 and 12 forms a three-pole conductivity measuring sensor. The other structures are the same as those of the conductivity measuring sensor of the first embodiment shown in FIG. 1, and the same parts are designated by the same reference numerals and the detailed description thereof will be omitted.
【００４２】この第３実施例の導電率測定センサは、上
記のように構成されているので、第１実施例と同様に、
導電率χを算出する数１の式における電流Ｉ1 及びＩ2
の電流経路の断面積、即ち試水の断面積Ｓを確定するこ
とができるため、数１に示す算出式を確実に成立させる
ことができる。よって、図９に示す従来の３極方式の導
電率測定センサ１２１よりも、高い測定精度を実現する
ことができる。また、試水の温度測定についても、温度
センサ７が試水の温度そのものを測定できるように構成
されているので、図９に示す従来の３極方式の導電率測
定センサよりも正確な温度補正を実現することができ、
これによって、高い精度で試水の導電率を求めることが
できる。Since the conductivity measuring sensor of the third embodiment is constructed as described above, like the first embodiment,
The electric currents I 1 and I 2 in the formula 1 for calculating the conductivity χ
Since the cross-sectional area of the current path, that is, the cross-sectional area S of the sample water can be determined, the calculation formula shown in Formula 1 can be reliably established. Therefore, it is possible to realize higher measurement accuracy than that of the conventional three-pole type conductivity measurement sensor 121 shown in FIG. Also, regarding the temperature measurement of the sample water, since the temperature sensor 7 is configured to measure the temperature of the sample water itself, the temperature correction is more accurate than that of the conventional three-pole type conductivity measurement sensor shown in FIG. Can be realized,
Thereby, the conductivity of the sample water can be obtained with high accuracy.
【００４３】なお、図５では、電圧計１２及び１２ａ
を、測定用電極１１ｄと電源電極１１ｃとの間、及び測
定用電極１２ｄと電源電極１２ｃとの間に、各々設けて
いるが、測定用電極１１ｄと電源電極１１ｂとの間、及
び測定用電極１２ｄと電源電極１２ｂとの間に設けても
よい。In FIG. 5, the voltmeters 12 and 12a are used.
Are provided between the measurement electrode 11d and the power supply electrode 11c and between the measurement electrode 12d and the power supply electrode 12c, respectively, but between the measurement electrode 11d and the power supply electrode 11b, and between the measurement electrode. It may be provided between 12d and the power supply electrode 12b.
【００４４】図６は、本発明に係る導電率測定センサの
第４実施例を示す断面図である。同図に示すように、こ
の導電率測定センサは、図１に示す第１実施例の導電率
測定センサにおいて、測定管１及び２に設けられていた
測定用電極１ｄ、１ｅ、及び２ｄ、２ｅを省いた構成の
ものである。そして、測定管１及び２の各２つの電源電
極を、第１実施例における各測定用電極として兼用する
ものである。従って、図１に示す第１実施例では、測定
管１及び２が、各々４極方式の導電率測定センサを形成
していたが、この図６に示す導電率測定センサでは、各
測定管１１及び１２が、各々２極方式の導電率測定セン
サを形成する。なお、これ以外の構造については、図１
に示す第１実施例の導電率測定センサと同等であり、同
等部分には同一符号を付して、その詳細を省略する。FIG. 6 is a sectional view showing a fourth embodiment of the conductivity measuring sensor according to the present invention. As shown in the figure, this conductivity measuring sensor is the same as the conductivity measuring sensor of the first embodiment shown in FIG. 1 except that the measuring electrodes 1d, 1e and 2d, 2e provided on the measuring tubes 1 and 2 are used. It has a configuration without. The two power supply electrodes of the measuring tubes 1 and 2 are also used as the measuring electrodes in the first embodiment. Therefore, in the first embodiment shown in FIG. 1, the measuring tubes 1 and 2 each form a four-pole type conductivity measuring sensor, but in the conductivity measuring sensor shown in FIG. And 12 each form a two-pole conductivity measuring sensor. For other structures, see FIG.
The conductivity measuring sensor is equivalent to the conductivity measuring sensor of the first embodiment shown in FIG.
【００４５】この第４実施例の導電率測定センサは、上
記のように構成されているので、第１実施例と同様に、
導電率χを算出する数１の式における電流Ｉ1 及びＩ2
の電流経路の断面積、即ち試水の断面積Ｓを確定するこ
とができるため、数１に示す算出式を確実に成立させる
ことができる。よって、図１０に示す従来の２極方式の
導電率測定センサ２２１よりも、高い測定精度を実現す
ることができる。また、試水の温度測定についても、温
度センサ７が試水の温度そのものを測定できるように構
成されているので、図１０に示す従来の２極方式の導電
率測定センサよりも正確な温度補正を実現することがで
き、これによって、高い精度で試水の導電率を求めるこ
とができる。Since the conductivity measuring sensor of the fourth embodiment is constructed as described above, like the first embodiment,
The electric currents I 1 and I 2 in the formula 1 for calculating the conductivity χ
Since the cross-sectional area of the current path, that is, the cross-sectional area S of the sample water can be determined, the calculation formula shown in Formula 1 can be reliably established. Therefore, it is possible to realize higher measurement accuracy than the conventional two-pole conductivity measurement sensor 221 shown in FIG. Also, regarding the temperature measurement of the sample water, since the temperature sensor 7 is configured to measure the temperature of the sample water itself, it is possible to correct the temperature more accurately than the conventional two-pole type conductivity measurement sensor shown in FIG. And the conductivity of the sample water can be obtained with high accuracy.
【００４６】[0046]
【発明の効果】第１の発明の導電率測定センサは、４極
方式の導電率測定センサを構成するセルを偶数個備えた
構造になっており、また各セルの試水流通路を直列の状
態で１本に接続することによって、全てのセルが同じ試
水を測定するように構成されている。従って、各セルの
測定値の平均を取るなどの処理を行うことによって、従
来の４極方式の導電率測定センサよりも高い測定精度を
得ることができるという効果がある。なお、この効果
は、セルの数が多いほど顕著に現れる。The conductivity measuring sensor of the first invention has a structure having an even number of cells constituting the conductivity measuring sensor of the four-pole type, and the test water flow passage of each cell is connected in series. All cells are configured to measure the same sample water by connecting to one in the state. Therefore, by performing processing such as averaging the measured values of each cell, it is possible to obtain higher measurement accuracy than that of the conventional quadrupole conductivity measurement sensor. Note that this effect becomes more prominent as the number of cells increases.
【００４７】また、各セルの各電源電極に電源を供給し
たとき、各セル毎の対をなす電源電極は各々逆の極性に
なり、また隣接するセル間の隣り合う電源電極は各々同
じ極性になるように構成されている。このように構成さ
れているので、電源を供給することによって流れる電流
は、各セル毎の電源電極間にのみ流れ、また１本に接続
された試水流通路全体の入口側及び出口側に位置する電
源電極は必然的に同じ極性になるので、この試水流通路
全体の入口側及び出口側に位置する電源電極間における
電流の流れ込みを防ぐことができる。更に、導電率χの
測定部分となる１つの測定用電極間における試水流通路
の断面積は一定である。従って、各セル毎における電流
経路の断面積、即ち試水そのものの断面積が確定される
ため、上記数１に示す式を確実に成立させることがで
き、これによって、従来の４極方式の導電率測定センサ
よりも高い測定精度を得ることができるという効果があ
る。When power is supplied to each power electrode of each cell, the pair of power electrodes of each cell have opposite polarities, and adjacent power electrodes of adjacent cells have the same polarity. Is configured to be. With this configuration, the current that flows when power is supplied flows only between the power electrodes of each cell, and is located on the inlet and outlet sides of the entire sample water flow passage connected to one cell. Since the power electrodes to be inevitably have the same polarity, it is possible to prevent the inflow of current between the power electrodes located on the inlet side and the outlet side of the entire test water flow passage. Furthermore, the cross-sectional area of the sample water flow passage between one measurement electrode, which is the portion for measuring the conductivity χ, is constant. Therefore, since the cross-sectional area of the current path in each cell, that is, the cross-sectional area of the sample water itself is determined, the formula shown in the above mathematical formula 1 can be surely established, and thus, the conductivity of the conventional four-pole system can be established. There is an effect that it is possible to obtain higher measurement accuracy than the rate measurement sensor.
【００４８】第２の発明の導電率測定センサは、試水の
温度を測定するための温度センサを、各セル毎の対をな
す測定用電極間以外の試水流通路内、又は接続部内に温
度センサを設けている。従って、試水流通路内を通る試
水そのものの温度を測定することができるので、従来の
４極方式の導電率測定センサよりも正確な温度補正を実
現することができ、これによって、従来よりも高い精度
で試水の導電率を求めることができるという効果があ
る。In the conductivity measuring sensor of the second invention, a temperature sensor for measuring the temperature of the sample water is provided in the sample water flow passage other than between the pair of measurement electrodes for each cell, or in the connection portion. A temperature sensor is provided. Therefore, the temperature of the sample water itself passing through the sample water flow passage can be measured, so that more accurate temperature correction can be realized than that of the conventional four-pole type conductivity measurement sensor. There is an effect that the conductivity of the sample water can be obtained with high accuracy.
【００４９】第３の発明の導電率測定センサは、３極方
式の導電率測定センサを構成するセルを偶数個備えた構
造になっており、また各セルの試水流通路を直列の状態
で１本に接続することによって、全てのセルが同じ試水
を測定するように構成されている。従って、各セルの測
定値の平均を取るなどの処理を行うことによって、従来
の３極方式の導電率測定センサよりも高い測定精度を得
ることができるという効果がある。なお、この効果は、
セルの数が多いほど顕著に現れる。The conductivity measuring sensor of the third invention has a structure having an even number of cells constituting the conductivity measuring sensor of the three-pole type, and the test water flow passage of each cell is connected in series. By connecting to one, all cells are configured to measure the same test water. Therefore, by performing processing such as averaging the measured values of each cell, it is possible to obtain higher measurement accuracy than the conventional three-pole type conductivity measurement sensor. This effect is
The more cells there are, the more prominent it appears.
【００５０】また、各セルの電源電極及び電源兼測定用
電極間に電源を供給したとき、各セル毎の電源電極及び
電源兼測定用電極は各々逆の極性になり、また隣接する
セル間の隣り合う電源電極又は電源兼測定用電極は各々
同じ極性になるように構成されている。このように構成
されているので、電源を供給することによって流れる電
流は、各セル毎の電源電極及び電源兼測定用電極間にの
み流れ、また１本に接続された試水流通路全体の入口側
及び出口側に位置する電源電極又は電源兼測定用電極は
必然的に同じ極性になるので、この試水流通路全体の入
口側及び出口側に位置するこれらの電極間における電流
の流れ込みを防ぐことができる。更に、導電率χの測定
部分となる電源兼測定用電極及び測定用電極間における
試水流通路の断面積は一定である。従って、各セル毎に
おける電流経路の断面積、即ち試水そのものの断面積が
確定されるため、上記数１に示す式を確実に成立させる
ことができ、これによって、従来の３極方式の導電率測
定センサよりも高い測定精度を得ることができるという
効果がある。When power is supplied between the power supply electrode and the power supply / measurement electrode of each cell, the power supply electrode and the power supply / measurement electrode of each cell have opposite polarities, and between adjacent cells. Adjacent power supply electrodes or power supply / measurement electrodes are configured to have the same polarity. With this configuration, the current that flows when power is supplied flows only between the power supply electrode and the power supply / measurement electrode of each cell, and the inlet of the entire sample water flow passage connected to one Since the power supply electrodes or the power supply / measurement electrodes located on the side of the outlet and the side of the outlet inevitably have the same polarity, the flow of current between these electrodes located on the inlet side and the outlet side of the entire test water flow passage is prevented. be able to. Further, the cross-sectional area of the sample water flow passage between the measuring electrode and the power source / measuring electrode, which is the portion for measuring the conductivity χ, is constant. Therefore, the cross-sectional area of the current path in each cell, that is, the cross-sectional area of the sample water itself is determined, so that the formula shown in the above mathematical expression 1 can be surely established, and thus the conductivity of the conventional three-pole system can be achieved. There is an effect that it is possible to obtain higher measurement accuracy than the rate measurement sensor.
【００５１】第４の発明の導電率測定センサは、試水の
温度を測定するための温度センサを、各セル毎の電源電
極及び電源兼測定用電極間以外の試水流通路内、又は接
続部内に温度センサを設けている。従って、試水流通路
内を通る試水そのものの温度を測定することができるの
で、従来の３極方式の導電率測定センサよりも正確な温
度補正を実現することができ、これによって、従来より
も高い精度で試水の導電率を求めることができるという
効果がある。In the conductivity measuring sensor of the fourth invention, a temperature sensor for measuring the temperature of the sample water is provided in the sample water flow passage other than between the power supply electrode and the power supply / measurement electrode for each cell, or connected. A temperature sensor is provided inside the unit. Therefore, the temperature of the sample water itself passing through the sample water flow passage can be measured, so that more accurate temperature correction can be realized than that of the conventional three-pole type conductivity measurement sensor. There is an effect that the conductivity of the sample water can be obtained with high accuracy.
【００５２】第５の発明の導電率測定センサは、２極方
式の導電率測定センサを構成するセルを偶数個備えた構
造になっており、また各セルの試水流通路を直列の状態
で１本に接続することによって、全てのセルが同じ試水
を測定するように構成されている。従って、各セルの測
定値の平均を取るなどの処理を行うことによって、従来
の２極方式の導電率測定センサよりも高い測定精度を得
ることができるという効果がある。なお、この効果は、
セルの数が多いほど顕著に現れる。The conductivity measuring sensor of the fifth invention has a structure having an even number of cells constituting the conductivity measuring sensor of the two-pole type, and the test water flow passage of each cell is connected in series. By connecting to one, all cells are configured to measure the same test water. Therefore, by performing processing such as taking an average of the measured values of each cell, there is an effect that it is possible to obtain higher measurement accuracy than that of the conventional two-pole type conductivity measurement sensor. This effect is
The more cells there are, the more prominent it appears.
【００５３】また、各セルの各電源兼測定用電極に電源
を供給したとき、各セル毎の対をなす電源兼測定用電極
は各々逆の極性になり、また隣接するセル間の隣り合う
電源兼測定用電極は各々同じ極性になるように構成され
ている。このように構成されているので、電源を供給す
ることによって流れる電流は、各セル毎の電源兼測定用
電極間にのみ流れ、また１本に接続された試水流通路全
体の入口側及び出口側に位置する電源兼測定用電極は必
然的に同じ極性になるので、この試水流通路全体の入口
側及び出口側に位置する電源兼測定用電極間における電
流の流れ込みを防ぐことができる。更に、導電率χの測
定部分となる対をなす電源兼測定用電極間における試水
流通路の断面積は一定である。従って、各セル毎におけ
る電流経路の断面積、即ち試水そのものの断面積が確定
されるため、上記数１に示す式を確実に成立させること
ができ、これによって、従来の２極方式の導電率測定セ
ンサよりも高い測定精度を得ることができるという効果
がある。When power is supplied to each power supply / measurement electrode of each cell, the pair of power supply / measurement electrodes of each cell have opposite polarities, and adjacent power supplies between adjacent cells. The dual measurement electrodes are configured to have the same polarity. With this configuration, the current that flows when power is supplied flows only between the power and measurement electrodes of each cell, and the inlet and outlet of the entire test water flow passage connected to one cell Since the power supply / measurement electrodes located on the side inevitably have the same polarity, it is possible to prevent current from flowing between the power supply / measurement electrodes located on the inlet side and the outlet side of the entire test water flow passage. Further, the cross-sectional area of the sample water flow passage between the pair of power supply / measuring electrodes, which is a portion for measuring the conductivity χ, is constant. Therefore, since the cross-sectional area of the current path in each cell, that is, the cross-sectional area of the sample water itself is determined, the equation shown in the above mathematical expression 1 can be surely established, whereby the conductivity of the conventional two-pole method can be established. There is an effect that it is possible to obtain higher measurement accuracy than the rate measurement sensor.
【００５４】第６の発明の導電率測定センサは、試水の
温度を測定するための温度センサを、各セル毎の対をな
す電源兼測定用電極間以外の試水流通路内、又は接続部
内に温度センサを設けている。従って、試水流通路内を
通る試水そのものの温度を測定することができるので、
従来の２極方式の導電率測定センサよりも正確な温度補
正を実現することができ、これによって、従来よりも高
い精度で試水の導電率を求めることができるという効果
がある。In the conductivity measuring sensor of the sixth aspect of the invention, a temperature sensor for measuring the temperature of the sample water is provided in the sample water flow passage other than between the pair of power supply and measurement electrodes for each cell, or is connected. A temperature sensor is provided inside the unit. Therefore, it is possible to measure the temperature of the sample water itself that passes through the sample water flow passage,
It is possible to realize more accurate temperature correction than that of the conventional two-pole type conductivity measuring sensor, which has an effect that the conductivity of the sample water can be obtained with higher accuracy than the conventional one.
【図１】本発明の第１実施例に係る導電率測定センサの
使用状態を示す断面図である。FIG. 1 is a cross-sectional view showing a usage state of a conductivity measuring sensor according to a first embodiment of the present invention.
【図２】同実施例に係る導電率測定センサの要部の断面
斜視図である。FIG. 2 is a sectional perspective view of a main part of the conductivity measuring sensor according to the embodiment.
【図３】図１に示す導電率測定センサを変形させた導電
率測定センサの使用状態を示す断面図である。FIG. 3 is a cross-sectional view showing a usage state of a conductivity measuring sensor obtained by modifying the conductivity measuring sensor shown in FIG.
【図４】本発明の第２実施例に係る導電率測定センサの
使用状態を示す断面図である。FIG. 4 is a cross-sectional view showing a usage state of the conductivity measuring sensor according to the second embodiment of the present invention.
【図５】本発明の第３実施例に係る導電率測定センサの
使用状態を示す断面図である。FIG. 5 is a cross-sectional view showing a usage state of the conductivity measuring sensor according to the third embodiment of the present invention.
【図６】本発明の第４実施例に係る導電率測定センサの
使用状態を示す断面図である。FIG. 6 is a cross-sectional view showing a usage state of the conductivity measuring sensor according to the fourth embodiment of the present invention.
【図７】従来の導電率測定センサの使用状態を示す側面
図である。FIG. 7 is a side view showing a usage state of a conventional conductivity measuring sensor.
【図８】従来の導電率測定センサの断面斜視図である。FIG. 8 is a sectional perspective view of a conventional conductivity measuring sensor.
【図９】従来の導電率測定センサの使用状態を示す側面
図である。FIG. 9 is a side view showing a usage state of a conventional conductivity measuring sensor.
【図１０】従来の導電率測定センサの使用状態を示す側
面図である。FIG. 10 is a side view showing a usage state of a conventional conductivity measuring sensor.
１、２ 測定管 １ａ、２ａ 絶縁管 １ｂ、１ｃ、２ｂ、２ｃ 電源電極 １ｄ、１ｅ、２ｄ、２ｅ 測定用電極 ３ 絶縁カバー ３ａ 接続部 ４ａ 試水吸入口 ５ａ 試水排出口 ６ 短絡線 ７ 温度センサ ８ 試水流通路 １０ 交流電源 １１、１１ａ 電流計 １２、１２ａ 電圧計 1, 2 Measuring tube 1a, 2a Insulating tube 1b, 1c, 2b, 2c Power supply electrode 1d, 1e, 2d, 2e Measuring electrode 3 Insulation cover 3a Connection part 4a Sample water inlet 5a Sample water outlet 6 Short circuit wire 7 Temperature Sensor 8 Test water flow passage 10 AC power supply 11, 11a Ammeter 12, 12a Voltmeter
Claims (6)
すると共に上記試水流通路の入口及び出口として上記内
部に通ずる２つの開口部を有する中空体と、電極面が上
記試水流通路内にのみ露出する状態に上記試水流通路に
沿って各々所定の間隔を隔てて設けた対をなす測定用電
極と、上記測定用電極の対を挟んで各々予め定めた間隔
を隔てると共に電極面が上記試水流通路にのみ露出する
状態に設けた対をなす電源電極とを具備し、上記試水流
通路の方向に対して直角な上記試水流通路の断面積が少
なくとも上記対をなす測定用電極間において一定に構成
されたセルを偶数個有し、 上記偶数個のセルの各上記試水流通路を各々直列に接続
する接続部を備え、上記電源電極に電源を供給したと
き、上記各セル内の上記対をなす電源電極が各々逆の極
性になる状態に、かつ隣接する上記セル間においては各
々隣り合う上記電源電極の極性が同じ極性になる状態に
構成したことを特徴とする導電率測定センサ。1. A hollow body made of an insulating material, having a sample water flow passage formed therein, and having two openings communicating with the inside as an inlet and an outlet of the sample water flow passage, and an electrode surface for flowing the sample water. A pair of measurement electrodes provided at predetermined intervals along the sample water flow passage so as to be exposed only in the channel, and a predetermined interval between the pair of measurement electrodes. A pair of power supply electrodes provided such that the electrode surfaces are exposed only to the sample water flow passage, and a cross-sectional area of the sample water flow passage perpendicular to the direction of the sample water flow passage is at least the pair. Has an even number of cells that are uniformly configured between the measurement electrodes that form, and includes a connecting portion that connects each of the sample water flow passages of the even number of cells in series, and supplies power to the power supply electrodes. When the pair of power electrodes in each cell are Conductivity measuring sensor, characterized in that the state becomes the polarity, and the polarity of the adjacent said supply electrodes adjacent each between the cell is constructed in a state where the same polarity.
測定用電極間の外側に位置する上記試水流通路内、又は
上記接続部内に温度センサを設けたことを特徴とする請
求項１に記載の導電率測定センサ。2. A temperature sensor is provided in the test water flow passage, which is located outside the pair of measurement electrodes in the test water flow passage, or in the connection portion. The conductivity measuring sensor according to.
すると共に上記試水流通路の入口及び出口として上記内
部に通ずる２つの開口部を有する中空体と、電極面が上
記試水流通路内にのみ露出する状態に設けた測定用電極
と、電極面が上記試水流通路内にのみ露出する状態に上
記試水流通路に沿って上記測定用電極から所定の間隔を
隔てて設けた電源兼測定用電極と、上記測定用電極の上
記電源兼測定用電極が位置する側とは反対側に上記電源
兼測定用電極から予め定めた間隔を隔てると共に電極面
が上記試水流通路にのみ露出する状態に設けた電源電極
とを具備し、上記試水流通路の方向に対して直角な上記
試水流通路の断面積が少なくとも上記測定用電極と電源
兼測定用電極との間において一定に構成されたセルを偶
数個有し、 上記偶数個のセルの各上記試水流通路を各々直列に接続
する接続部を備え、上記電源兼測定用電極及び上記電源
電極に電源を供給したとき、上記各セル内の上記電源兼
測定用電極及び上記電源電極の極性が各々逆の極性にな
る状態に、かつ隣接する上記セル間においては各々隣り
合う上記電源兼測定用電極又は上記電源電極が同じ極性
になる状態に構成したことを特徴とする導電率測定セン
サ。3. A hollow body which is made of an insulating material and which has a sample water flow passage therein and has two openings communicating with the inside as an inlet and an outlet of the sample water flow passage, and an electrode surface for flowing the sample water flow. The measurement electrode provided only in the passage and the electrode surface provided at a predetermined distance from the measurement electrode along the test water passage so that the electrode surface is exposed only in the test water passage. The power source / measurement electrode is separated from the power source / measurement electrode on the side opposite to the side where the power source / measurement electrode is located, and the electrode surface has the sample water flow passage. And a power electrode provided in a state of being exposed only to the measurement electrode, and a cross-sectional area of the sample water flow passage perpendicular to the direction of the sample water flow passage is at least between the measurement electrode and the power supply / measurement electrode. Has an even number of cells configured uniformly in Each cell is provided with a connecting portion for connecting each of the sample water flow passages in series, and when power is supplied to the power source / measurement electrode and the power source electrode, the power source / measurement electrode in each cell and It is characterized in that the polarities of the power supply electrodes are opposite to each other, and that between the adjacent cells, the adjacent power supply / measurement electrodes or the power supply electrodes have the same polarity. Conductivity measurement sensor.
上記測定用電極と電源兼測定用電極間の外側に位置する
上記試水流通路内、又は上記接続部内に温度センサを設
けたことを特徴とする請求項３に記載の導電率測定セン
サ。4. A temperature sensor is provided in the sample water flow passage located outside the measurement electrode and the power source / measurement electrode for each cell in the sample water flow passage, or in the connection portion. The conductivity measuring sensor according to claim 3.
すると共に上記試水流通路の入口及び出口として上記内
部に通ずる２つの開口部を有する中空体と、電極面が上
記試水流通路内にのみ露出する状態に上記試水流通路に
沿って各々所定の間隔を隔てて設けた対をなす電源兼測
定用電極とを具備し、上記試水流通路の方向に対して直
角な上記試水流通路の断面積が上記対をなす電源兼測定
用電極間において一定に構成されたセルを偶数個有し、 上記偶数個のセルの各上記試水流通路を各々直列に接続
する接続部を備え、上記電源兼測定用電極に電源を供給
したとき、上記各セル内の上記対をなす電源兼測定用電
極が各々逆の極性になる状態に、かつ隣接する上記セル
間においては各々隣り合う上記電源兼測定用電極の極性
が同じ極性になる状態に構成したことを特徴とする導電
率測定センサ。5. A hollow body which is made of an insulator and has a sample water flow passage formed therein, and which has two openings communicating with the inside as an inlet and an outlet of the sample water flow passage, and an electrode surface for flowing the sample water. A pair of power supply and measurement electrodes provided at predetermined intervals along the test water flow passage so as to be exposed only in the flow passage, and being perpendicular to the direction of the test water flow passage. The sample water flow passage has an even number of cells configured to have a constant cross-sectional area between the pair of power supply / measuring electrodes, and the sample water flow passages of the even number of cells are connected in series. When a power supply is provided to the power supply / measurement electrode having a connecting portion, the pair of power supply / measurement electrodes in each cell have opposite polarities, and between adjacent cells. The polarities of the adjacent power source / measurement electrodes are the same. Conductivity measuring sensor, characterized by being configured to condition.
上記対をなす電源兼測定用電極間の外側に位置する上記
試水流通路内、又は上記接続部内に温度センサを設けた
ことを特徴とする請求項５に記載の導電率測定センサ。6. A temperature sensor is provided in the sample water flow passage located outside the pair of power source / measurement electrodes for each cell in the sample water flow passage, or in the connection portion. The conductivity measuring sensor according to claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6100559A JP2579281B2 (en) | 1994-04-13 | 1994-04-13 | Conductivity measurement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6100559A JP2579281B2 (en) | 1994-04-13 | 1994-04-13 | Conductivity measurement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07280765A true JPH07280765A (en) | 1995-10-27 |
| JP2579281B2 JP2579281B2 (en) | 1997-02-05 |
Family
ID=14277292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6100559A Expired - Lifetime JP2579281B2 (en) | 1994-04-13 | 1994-04-13 | Conductivity measurement sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2579281B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002372508A (en) * | 2001-06-15 | 2002-12-26 | Saginomiya Seisakusho Inc | Electric conductivity sensor manufacturing method, and electric conductivity sensor |
| CN105606901A (en) * | 2015-12-24 | 2016-05-25 | 河海大学 | MEMS seawater conductivity sensor with filtering device |
| WO2021193274A1 (en) * | 2020-03-25 | 2021-09-30 | 国立研究開発法人海洋研究開発機構 | Measurement cell for electric conductivity meter, and electric conductivity meter comprising same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234795A (en) * | 1975-06-19 | 1977-03-16 | Nippon Miniature Bearing Co | Detecting apparatus for fluid concentration |
-
1994
- 1994-04-13 JP JP6100559A patent/JP2579281B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234795A (en) * | 1975-06-19 | 1977-03-16 | Nippon Miniature Bearing Co | Detecting apparatus for fluid concentration |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002372508A (en) * | 2001-06-15 | 2002-12-26 | Saginomiya Seisakusho Inc | Electric conductivity sensor manufacturing method, and electric conductivity sensor |
| JP4689085B2 (en) * | 2001-06-15 | 2011-05-25 | 株式会社鷺宮製作所 | Manufacturing method of electrical conductivity sensor and electrical conductivity sensor |
| CN105606901A (en) * | 2015-12-24 | 2016-05-25 | 河海大学 | MEMS seawater conductivity sensor with filtering device |
| CN105606901B (en) * | 2015-12-24 | 2018-02-23 | 河海大学 | A kind of MEMS sea water conductivity sensors with filter |
| WO2021193274A1 (en) * | 2020-03-25 | 2021-09-30 | 国立研究開発法人海洋研究開発機構 | Measurement cell for electric conductivity meter, and electric conductivity meter comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2579281B2 (en) | 1997-02-05 |
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