JPS6088357A - Measurement of potential of ac superposed embedded pipe - Google Patents
Measurement of potential of ac superposed embedded pipeInfo
- Publication number
- JPS6088357A JPS6088357A JP19668383A JP19668383A JPS6088357A JP S6088357 A JPS6088357 A JP S6088357A JP 19668383 A JP19668383 A JP 19668383A JP 19668383 A JP19668383 A JP 19668383A JP S6088357 A JPS6088357 A JP S6088357A
- Authority
- JP
- Japan
- Prior art keywords
- potential
- value
- peak
- diode
- embedded pipe
- 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.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title description 2
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004210 cathodic protection Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、バラプライン又は埋設管などが送電線その他
の影響で交流が重畳している場合に、管の対地電位の値
を携帯用の簡易測定装置により計測する方法に関するも
のである、
従来この独のパイフンイン又は埋設管などで交流の影響
を調査する為に交流電圧計を使用すると、その実効値或
は波高値のみが計測され、交流による電位変化は測定で
きないのでオンロスコープのような高度な計測装置と共
に大きな電源も必袈となるなど簡噴に測定できない欠点
があった、本発明の目的は、上述のように、交流が重畳
した埋設金属構造物の対地電位などを尖頭波検出回路を
有する１１１ｊ易な電位測定装置により計測する方法を
提供するものである、
以下、水沫を添付の図面に基いて説明すると、通常、埋
設管などの腐食の有無は第１図に示すような方法で管対
地電位を計測する、同図は土用或は液体ｌに埋設された
埋設管２が電位測定器４の一端子に、他端子には照合電
極３が接続されている、この方法での計測結果は、第２
図５に示されたようになシ、大地迷走電流や、交流誘導
・交流混触などが無ければ、その値は時間経過に対して
太なる変化はなく直流電位として計測でれ、５は自然電
位、６は防食電位を示す、この場合、電気防食を行えば
６のようにｅ方向に移動する。、５は自然電位、６は防
食電位と呼ばれる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the value of the ground potential of a loose line or buried pipe using a portable simple measuring device when alternating current is superimposed on the pipe due to the influence of power transmission lines or other factors. Conventionally, when using an AC voltmeter to investigate the influence of alternating current on piping pipes or buried pipes, only the effective value or peak value is measured, and changes in potential due to alternating current cannot be measured, so As mentioned above, the purpose of the present invention is to measure the ground potential of buried metal structures where alternating current is superimposed. The present invention provides a method for measuring water droplets using a simple potential measuring device having a peak wave detection circuit.The water droplets will be explained below based on the attached drawings.Normally, the first thing to check is whether or not there is corrosion in buried pipes, etc. The pipe-to-ground potential is measured by the method shown in the figure, in which a buried pipe 2 buried in soil or liquid is connected to one terminal of a potential measuring device 4, and a reference electrode 3 is connected to the other terminal. The measurement results using this method are as follows:
As shown in Figure 5, if there is no ground stray current, AC induction or AC contact, the value does not change significantly over time and can be measured as a DC potential, and 5 is the natural potential. , 6 indicates the corrosion protection potential. In this case, if cathodic protection is performed, the material moves in the e direction as shown in 6. , 5 is called the natural potential, and 6 is called the anticorrosion potential.
上記のような場合に対して、送電線などからの誘導が行
われると、管の対地電位は、第３図のように交流会が重
畳し、電位は時間の経過と共に変動し、且つ前記自然電
位又は防食電位は■方向にも変動する、埋設金属体がそ
の自然電位よりの方向に変動すると、陽極溶触部ち腐食
を始めるのでこの金属の電位を管理することは腐負１υ
ノ止上重要カことである、ここに於て本願では第４図に
示でれたように、尖頭波検出回路を有する電位測定装置
により、埋設管の対地電位を測定することにより、６ｉ
ｌ記■、■のピーク値を検出することが発明てれた。図
中のピークホールド回路を切換スイッチ１５のθに接続
することによシ、埋設管の対地電位の最高値７をまた切
換スイッチ１５の■側に接続することにより、埋設管の
対地電位のｅ測量高値８が検出できる。、同前記尖頭波
検出回路は第４図に示すように、基本的にダイオード１
１と、コンデンサ１４から構成でれているピークホール
ド回路を使用しているが、ダイオード１１における電圧
降下を補償する増「ＩＪ器１０と、よシ安定した動作を
得ることができるように抵抗１２及び比較器１６が設け
られている。In the case described above, if induction is performed from a power transmission line, etc., the potential to the ground of the pipe will overlap as shown in Figure 3, and the potential will fluctuate with the passage of time, and the above-mentioned natural The potential or anticorrosion potential also fluctuates in the ■ direction. If a buried metal body fluctuates in the direction of its natural potential, the anode welding area will begin to corrode, so controlling the potential of this metal is important to prevent corrosion.
It is important to note that in this application, as shown in FIG.
It was invented to detect the peak values of (1) and (1). By connecting the peak hold circuit in the figure to θ of the changeover switch 15, the highest value 7 of the ground potential of the buried pipe is also connected to the Survey high value 8 can be detected. , the above-mentioned peak wave detection circuit basically consists of a diode 1 as shown in FIG.
1 and a capacitor 14, an additional IJ circuit 10 is used to compensate for the voltage drop across the diode 11, and a resistor 12 is used to ensure stable operation. and a comparator 16 are provided.
以上述べたように拳法に依って埋設金属体に対する交流
の影響の太き芒を測定できるので之を前述の第１図の計
測時に迫力口すれば、埋設金属体の通常の対地電位と、
交流による■３ｅの変動値を同時に知ることができるの
で腐食防食の管理上人なる効果を奏する。、伺水沫を使
用することりこより前述したような交流誘導や交流混触
を管」１１；することもできる利点がある。As mentioned above, it is possible to measure the influence of alternating current on a buried metal body using Kenpo, so if we emphasize this when measuring in Figure 1 above, we can measure the normal ground potential of the buried metal body,
Since it is possible to simultaneously know the fluctuation value of 3e due to alternating current, it is effective in managing corrosion protection. It also has the advantage of being able to conduct AC induction and AC contact as described above.
第１図は管の対地電位計測の概略図、第２図は迷走電流
や、交流の影響のないｕＪの自然電位と、防食電位を示
す図、第３図は交流の影響により埋設管の対地電位が■
、θになった状態を爪す図、第４図は尖頭波検出装置の
回路図である。
ｌ・・・土壌又は液体、２・・・埋設管、３・・・照合
電極、４・・・電位測定器、５・・・自然電位、６・・
・１９ノ食電ヘン、７・・・■の管の対電位、８・・・
ｅの管の対電位、９・・・入力端子、１０・・・増［１
〕器、１１・・・ダイオード、１２・・・抵抗、１３・
・・指示器％１４・・・コンデンサ、１５・・・切換ス
イッチ、Ｊ６・・・比較器。
出 願 人 日本防蝕工業株式会社
代理人（弁理士） 渡 辺 −ｆ竪賓しＶに”１．、
。
ンテ７４力
うＺａ
一ぺ〃ｑ
ノｆり４ｊ・
一グポ
、′ｆ４Ａ勿
２Figure 1 is a schematic diagram of measuring the ground potential of a pipe. Figure 2 is a diagram showing the natural potential of uJ without the influence of stray current or alternating current, and the anti-corrosion potential. Figure 3 is a diagram showing the ground potential of a buried pipe due to the influence of alternating current. The potential is ■
, θ, and FIG. 4 is a circuit diagram of the peak wave detection device. 1... Soil or liquid, 2... Buried pipe, 3... Reference electrode, 4... Potential measuring device, 5... Natural potential, 6...
・19 food electric potential, 7...■ tube pair potential, 8...
Pair potential of tube e, 9...input terminal, 10...increase [1
] device, 11... diode, 12... resistor, 13...
... Indicator %14... Capacitor, 15... Selector switch, J6... Comparator. Applicant: Japan Anti-Corrosion Industry Co., Ltd. Agent (Patent Attorney) Watanabe -f “1.”
. Nte 74 Power Za Ippeq Nofri4j・Igupo,'f4A Naru2
Claims (1)
又は水中における埋設管の電位計測法、A method for measuring the potential of a buried pipe in soil or water with superimposed alternating current using a device having a peak wave detection circuit;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19668383A JPS6088357A (en) | 1983-10-20 | 1983-10-20 | Measurement of potential of ac superposed embedded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19668383A JPS6088357A (en) | 1983-10-20 | 1983-10-20 | Measurement of potential of ac superposed embedded pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6088357A true JPS6088357A (en) | 1985-05-18 |
Family
ID=16361854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19668383A Pending JPS6088357A (en) | 1983-10-20 | 1983-10-20 | Measurement of potential of ac superposed embedded pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088357A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511486U (en) * | 1978-07-10 | 1980-01-24 | ||
| JPS5550304A (en) * | 1978-10-11 | 1980-04-12 | Yoshida Kogyo Kk | Fastener chain and production |
-
1983
- 1983-10-20 JP JP19668383A patent/JPS6088357A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511486U (en) * | 1978-07-10 | 1980-01-24 | ||
| JPS5550304A (en) * | 1978-10-11 | 1980-04-12 | Yoshida Kogyo Kk | Fastener chain and production |
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