JP2011027613A - Conductivity meter - Google Patents

Conductivity meter Download PDF

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Publication number
JP2011027613A
JP2011027613A JP2009175110A JP2009175110A JP2011027613A JP 2011027613 A JP2011027613 A JP 2011027613A JP 2009175110 A JP2009175110 A JP 2009175110A JP 2009175110 A JP2009175110 A JP 2009175110A JP 2011027613 A JP2011027613 A JP 2011027613A
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Prior art keywords
electrode
conductivity meter
insulator
electrodes
conductivity
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Inventor
Takeshi Kuwagata
武志 鍬形
Kiyoyuki Kitaoku
清行 北奥
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Yokogawa Electric Corp
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Yokogawa Electric Corp
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Priority to JP2009175110A priority Critical patent/JP2011027613A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a conductivity meter capable of lessening measurement errors of fluid to be measured due to adhesion of contamination, extending a cleaning period and making its equipment compact. <P>SOLUTION: The conductivity meter including a first electrode in the form of a tube whose one end is connected with a sensor body, a plate-like insulator disposed on the one end side of the first electrode so as to be perpendicular to an axis of the tube, and a columnar second electrode attached to one surface of the insulator so as to be inside the first electrode, is characterized by having a high-frequency minute vibration means which is attached to the other surface of the insulator. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、導電率計に関するものである。
更に詳述すれば、振動型汚れ付着防止機構付きの導電率計の電極に関するものである。
The present invention relates to a conductivity meter.
More specifically, the present invention relates to an electrode of a conductivity meter with a vibration type dirt adhesion prevention mechanism.

図3は従来より一般に使用されている従来例の要部構成説明図である。
図において、第1の電極2は、センサボディ1に一方端が接続され、筒状をなす。
スペーサ3は、第1の電極2の一方端の内面に一方の面が接続されて、筒状をなす。
この場合は、ふっ素樹脂が使用されている。
第2の電極4は、第1の電極2の内側であって、スペーサ3の他方の面に一方の面が接続され、柱形をなす。
FIG. 3 is an explanatory view showing the structure of a main part of a conventional example that is generally used.
In the figure, the first electrode 2 is connected to the sensor body 1 at one end and has a cylindrical shape.
One surface of the spacer 3 is connected to the inner surface of one end of the first electrode 2 to form a cylindrical shape.
In this case, a fluororesin is used.
The second electrode 4 is inside the first electrode 2 and has one surface connected to the other surface of the spacer 3 to form a columnar shape.

以上の構成において、導電率は、溶液中の電流の流れ易さの尺度を示す。
また、導電率の測定は、溶液中に2枚の金属を入れて、この電極間に一定振幅の交流電圧を加え、液中を流れる電流を測定することで求める。
そして、図3従来例では、円筒型の電極2と円柱型の電極4の2個の電極間を流れる電流を測定して導電率を求めている。
In the above configuration, the conductivity indicates a measure of the ease of current flow in the solution.
The conductivity is measured by putting two metals in the solution, applying an AC voltage with a constant amplitude between the electrodes, and measuring the current flowing in the solution.
In the conventional example of FIG. 3, the electric current is obtained by measuring the current flowing between two electrodes, the cylindrical electrode 2 and the columnar electrode 4.

特開2000−162168号公報JP 2000-162168 A 特開2002−236103号公報JP 2002-236103 A 特開2002−296210号公報JP 2002-296210 A

このような装置においては、以下の問題点がある。
導電率計は、電極表面に汚れが付着すると、電極表面の汚れが抵抗になるため、電極間を流れる電流が減少して、導電率を低く検出してしまい、測定誤差になってしまう。
このため、定期的に電極の洗浄を行う必要がある。
Such an apparatus has the following problems.
In the conductivity meter, when dirt is deposited on the electrode surface, the dirt on the electrode surface becomes resistance, so that the current flowing between the electrodes decreases, and the conductivity is detected low, resulting in a measurement error.
For this reason, it is necessary to periodically clean the electrodes.

したがって、導電率計は、2個または複数の電極表面の汚れにより、電極表面抵抗変化が生じて測定電流が変化することにより、導電率値の測定誤差が問題となる。
これらの問題を解決するために、外部に洗浄装置を設けたりすることもあるが、装置が大きくなり、設置スペースが必要、コストが掛かるなどの問題がある。
Therefore, in the conductivity meter, the measurement error of the conductivity value becomes a problem due to the change in the electrode surface resistance caused by the contamination of the surface of two or a plurality of electrodes and the change in the measurement current.
In order to solve these problems, a cleaning device may be provided outside, but there are problems that the device becomes large, installation space is required, and costs are increased.

本発明の目的は、上記の課題を解決するもので、測定流体の汚れの付着による測定誤差の発生を小さく出来、また、洗浄周期も伸ばすことが出来て、装置を小型化できる導電率計を提供することにある。   An object of the present invention is to solve the above problems, and to provide a conductivity meter that can reduce the occurrence of measurement errors due to the adhesion of dirt on the measurement fluid, and can extend the cleaning cycle, thereby miniaturizing the apparatus. It is to provide.

このような課題を達成するために、本発明では、請求項1の導電率計においては、
二つの電極間に交流電圧を印加して、流れる電流に基づいて測定流体の導電率を測定する導電率計において、センサボディに一方端が接続された筒状の第1の電極と、この第1の電極の筒軸に直交して前記第1の電極の一方端側に設けられた板状の絶縁体と、前記第1の電極の内側であって前記絶縁体の一方の面に取り付けられた柱状の第2の電極と、前記絶縁体の他方の面に取り付けられた高周波微小振動手段とを具備したことを特徴とする。
In order to achieve such a problem, in the present invention, in the conductivity meter of claim 1,
In a conductivity meter that measures the conductivity of a measurement fluid based on a flowing current by applying an alternating voltage between two electrodes, a cylindrical first electrode having one end connected to a sensor body, and the first electrode A plate-like insulator provided on one end side of the first electrode perpendicular to the cylinder axis of the first electrode, and attached to one surface of the insulator inside the first electrode. And a high-frequency microvibration means attached to the other surface of the insulator.

本発明の請求項2の導電率計においては、請求項1記載の導電率計において、
前記高周波微小振動手段は、圧電振動子が使用されたことを特徴とする。
In the conductivity meter according to claim 2 of the present invention, in the conductivity meter according to claim 1,
The high-frequency microvibration means uses a piezoelectric vibrator.

本発明の請求項1によれば、次のような効果がある。
汚れると検出量が変化する電極部を高周波微小振動手段を使用して高周波で微小振動をさせることにより、電極部に測定流体の汚れが付着するのを予防することができる導電率計が得られる。
これにより、測定流体の汚れによる測定誤差の発生を防止することができる導電率計が得られる。
また、メンテナンス周期を伸ばすことができる導電率計が得られる。
According to claim 1 of the present invention, there are the following effects.
A conductivity meter that can prevent contamination of the measurement fluid from adhering to the electrode portion can be obtained by causing the electrode portion whose detection amount to change when it is dirty to vibrate at high frequency using high-frequency microvibration means. .
Thereby, the conductivity meter which can prevent generation | occurrence | production of the measurement error by the contamination of the measurement fluid is obtained.
Moreover, the conductivity meter which can extend a maintenance period is obtained.

外付けの洗浄装置を取り付けないで済むため装置が小型化できる導電率計が得られる。
したがって、製作コストが低く抑えられる導電率計が得られる。
第1,第2の電極を絶縁する絶縁体に高周波微小振動手段が設けられたので、第1,第2の電極を同時に、近接して効率よく励振することが出来、汚れが付着するのを効率よく防止することが出来る導電率計が得られる。
Since it is not necessary to attach an external cleaning device, a conductivity meter that can reduce the size of the device can be obtained.
Therefore, a conductivity meter that can keep the manufacturing cost low can be obtained.
Since the high frequency micro-vibration means is provided in the insulator that insulates the first and second electrodes, the first and second electrodes can be excited simultaneously and efficiently, and dirt can be attached. A conductivity meter that can be efficiently prevented is obtained.

本発明の請求項2によれば、次のような効果がある。
高周波微小振動手段は、圧電振動子が使用されたので、小型で安価な高周波微小振動手段を有する導電率計が得られる。
According to claim 2 of the present invention, there are the following effects.
Since the piezoelectric vibrator is used as the high-frequency microvibration means, a conductivity meter having a small and inexpensive high-frequency microvibration means can be obtained.

本発明の一実施例の要部構成説明図である。It is principal part structure explanatory drawing of one Example of this invention. 図1の平面図である。It is a top view of FIG. 従来より一般に使用されている従来例の要部構成説明図である。It is principal part structure explanatory drawing of the prior art example generally used conventionally.

以下本発明を図面を用いて詳細に説明する。
図1は本発明の一実施例の要部構成説明図、図2は図1の平面図である。
図において、図3と同一記号の構成は同一機能を表す。
以下、図3との相違部分のみ説明する。
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view showing the construction of the main part of one embodiment of the present invention, and FIG. 2 is a plan view of FIG.
In the figure, configurations with the same symbols as in FIG. 3 represent the same functions.
Only the difference from FIG. 3 will be described below.

図1において、第1の電極11は、センサボディ1に一方端が接続され、筒状をなす。
絶縁体12は、第1の電極11の筒軸に直交して、第1の電極の一方端側に設けられ、板状をなす。
第2の電極13は、第1の電極11の内側であって、絶縁体12の一方の面に取り付けられ、柱状をなす。
高周波微小振動手段14は、絶縁体12の他方の面に取り付けられている。
In FIG. 1, the first electrode 11 is connected to the sensor body 1 at one end and has a cylindrical shape.
The insulator 12 is provided on one end side of the first electrode perpendicular to the cylinder axis of the first electrode 11 and has a plate shape.
The second electrode 13 is attached to one surface of the insulator 12 inside the first electrode 11 and has a columnar shape.
The high frequency micro vibration means 14 is attached to the other surface of the insulator 12.

この場合は、高周波微小振動手段14は、圧電振動子が使用されている。
圧電振動子14は、この場合は、絶縁体12を振動させ、電極11,13を同時に振動させる構造となっている。
なお、電極11,13の材質としては、この場合は、ステンレス、白金、チタンなどが使用される。
In this case, the high-frequency microvibration means 14 uses a piezoelectric vibrator.
In this case, the piezoelectric vibrator 14 has a structure in which the insulator 12 is vibrated and the electrodes 11 and 13 are vibrated simultaneously.
In this case, stainless steel, platinum, titanium or the like is used as the material of the electrodes 11 and 13.

また、絶縁体12には、従来は、ふっ素樹脂などを使用されるが、本発明では圧電素子を接着するために、接着可能で絶縁が大きい材料であるガラス、セラミックなどが使用されている。
絶縁体12と電極11,13間にはOリング15を使用して、センサボディ1の内部に測定流体が浸入しないようにされている。
Conventionally, a fluororesin or the like is used for the insulator 12, but in the present invention, glass, ceramic, or the like, which is a material that can be bonded and has a large insulation, is used to bond the piezoelectric element.
An O-ring 15 is used between the insulator 12 and the electrodes 11 and 13 to prevent the measurement fluid from entering the sensor body 1.

以上の構成において、円筒形の第1の電極11と円柱形の第2の電極13を、圧電振動子14を使用して、高周波の微小振動を与えることで、電極11,13の表面に、汚れが付着することを予防することが出来る。   In the above configuration, the cylindrical first electrode 11 and the cylindrical second electrode 13 are applied to the surfaces of the electrodes 11 and 13 by applying high-frequency minute vibrations using the piezoelectric vibrator 14. It is possible to prevent dirt from adhering.

この結果、
汚れると検出量が変化する電極部11,13を圧電素子14を使用して高周波で微小振動をさせることにより、電極部11,13に測定流体の汚れが付着するのを予防できる導電率計が得られる。
これにより、測定流体の汚れによる測定誤差の発生を防止できる導電率計が得られる。
また、メンテナンス周期を伸ばすことができる導電率計が得られる。
As a result,
A conductivity meter that can prevent the measurement fluid from adhering to the electrode portions 11 and 13 by minutely vibrating the electrode portions 11 and 13 whose detection amounts change when they become dirty using the piezoelectric element 14 at a high frequency. can get.
Thereby, the conductivity meter which can prevent generation | occurrence | production of the measurement error by the contamination of a measurement fluid is obtained.
Moreover, the conductivity meter which can extend a maintenance period is obtained.

外付けの洗浄装置を取り付けないで済むため装置が小型化できる導電率計が得られる。
したがって、製作コストが低く抑えられる導電率計が得られる。
第1,第2の電極11,13を絶縁する絶縁体12に、圧電素子14が設けられたので、第1,第2の電極11,13を同時に、近接して効率よく励振することが出来、汚れが付着するのを効率よく防止することが出来る導電率計が得られる。
Since it is not necessary to attach an external cleaning device, a conductivity meter that can reduce the size of the device can be obtained.
Therefore, a conductivity meter that can keep the manufacturing cost low can be obtained.
Since the piezoelectric element 14 is provided on the insulator 12 that insulates the first and second electrodes 11 and 13, the first and second electrodes 11 and 13 can be excited in close proximity and efficiently. As a result, a conductivity meter can be obtained that can efficiently prevent the adhesion of dirt.

高周波微小振動手段14は、圧電振動子が使用されたので、小型で安価な高周波微小振動手段を有する導電率計が得られる。   Since the piezoelectric vibrator is used for the high-frequency microvibration means 14, a conductivity meter having a small and inexpensive high-frequency microvibration means can be obtained.

なお、以上の説明は、本発明の説明および例示を目的として特定の好適な実施例を示したに過ぎない。
したがって本発明は、上記実施例に限定されることなく、その本質から逸脱しない範囲で更に多くの変更、変形をも含むものである。
The above description merely shows a specific preferred embodiment for the purpose of explanation and illustration of the present invention.
Therefore, the present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.

1 センサボディ
2 第1の電極
3 スペーサ
4 第2の電極
11 第1の電極
12 絶縁体
13 第2の電極
14 高周波微小振動手段
15 Oリング
DESCRIPTION OF SYMBOLS 1 Sensor body 2 1st electrode 3 Spacer 4 2nd electrode 11 1st electrode 12 Insulator 13 2nd electrode 14 High frequency micro vibration means 15 O-ring

Claims (2)

二つの電極間に交流電圧を印加して、流れる電流に基づいて測定流体の導電率を測定する導電率計において、
センサボディに一方端が接続された筒状の第1の電極と、
この第1の電極の筒軸に直交して前記第1の電極の一方端側に設けられた板状の絶縁体と、
前記第1の電極の内側であって前記絶縁体の一方の面に取り付けられた柱状の第2の電極と、
前記絶縁体の他方の面に取り付けられた高周波微小振動手段と
を具備したことを特徴とする導電率計。
In a conductivity meter that applies an alternating voltage between two electrodes and measures the conductivity of the measurement fluid based on the flowing current,
A cylindrical first electrode having one end connected to the sensor body;
A plate-like insulator provided on one end side of the first electrode perpendicular to the cylinder axis of the first electrode;
A columnar second electrode attached to one surface of the insulator inside the first electrode;
And a high-frequency microvibration means attached to the other surface of the insulator.
前記高周波微小振動手段は、圧電振動子が使用されたこと
を特徴とする請求項1記載の導電率計。
The conductivity meter according to claim 1, wherein a piezoelectric vibrator is used as the high-frequency microvibration means.
JP2009175110A 2009-07-28 2009-07-28 Conductivity meter Pending JP2011027613A (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104459334A (en) * 2014-12-26 2015-03-25 福建师范大学 Direct current excitation conductivity measurement method for liquid to circularly flow to wash surface of electrodes
CN104483555A (en) * 2014-12-26 2015-04-01 福建师范大学 Electrode oscillating type liquid conductivity measurement method
CN104502660A (en) * 2014-12-26 2015-04-08 福建师范大学 Swinging liquid conductivity measurement electrode
CN104502659A (en) * 2014-12-26 2015-04-08 福建师范大学 Rotary type liquid conductivity measurement electrode
CN104502714A (en) * 2014-12-26 2015-04-08 福建师范大学 Electrode rotating type liquid conductivity measuring method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104459334A (en) * 2014-12-26 2015-03-25 福建师范大学 Direct current excitation conductivity measurement method for liquid to circularly flow to wash surface of electrodes
CN104483555A (en) * 2014-12-26 2015-04-01 福建师范大学 Electrode oscillating type liquid conductivity measurement method
CN104502660A (en) * 2014-12-26 2015-04-08 福建师范大学 Swinging liquid conductivity measurement electrode
CN104502659A (en) * 2014-12-26 2015-04-08 福建师范大学 Rotary type liquid conductivity measurement electrode
CN104502714A (en) * 2014-12-26 2015-04-08 福建师范大学 Electrode rotating type liquid conductivity measuring method

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