JPH04181117A - Device for measuring water-depth position and potential of a metal structure under water surface - Google Patents
Device for measuring water-depth position and potential of a metal structure under water surfaceInfo
- Publication number
- JPH04181117A JPH04181117A JP30906090A JP30906090A JPH04181117A JP H04181117 A JPH04181117 A JP H04181117A JP 30906090 A JP30906090 A JP 30906090A JP 30906090 A JP30906090 A JP 30906090A JP H04181117 A JPH04181117 A JP H04181117A
- Authority
- JP
- Japan
- Prior art keywords
- water
- potential
- sensor
- depth position
- metal structure
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 21
- 239000002184 metal Substances 0.000 title claims abstract description 21
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000007799 cork Substances 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 239000013535 sea water Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- GTKRFUAGOKINCA-UHFFFAOYSA-M chlorosilver;silver Chemical compound [Ag].[Ag]Cl GTKRFUAGOKINCA-UHFFFAOYSA-M 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、河川、港湾等の水面下に建設された金属構
造物、例えば鋼矢板、鋼管杭等の水深位置に対する電位
を測定することのできる装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to measuring the electric potential of metal structures constructed under the water surface of rivers, ports, etc., such as steel sheet piles and steel pipe piles, with respect to the water depth position. This is related to a device that can do this.
一般に、河川、港湾等の水中に建設された金属構造物例
えば海水中の鋼矢板や鋼管杭等は、腐食による耐久性の
低下を防ぐため、種々の電気防食装置が設置されている
が、この防食効果の確認および管理には、この金属構造
物の対水電位を正確に測定する必要がある。上記金属構
造物の電位は、照合電極を金属構造物の測定したい部分
に接近させ、金属構造物と照合電極間の電位差を測定す
ることで判明する。従来の測定方法を第３図に示す。In general, metal structures built underwater in rivers, ports, etc., such as steel sheet piles and steel pipe piles in seawater, are equipped with various cathodic protection devices to prevent durability from decreasing due to corrosion. To confirm and manage the corrosion protection effect, it is necessary to accurately measure the water potential of this metal structure. The potential of the metal structure is determined by bringing a reference electrode close to a portion of the metal structure to be measured and measuring the potential difference between the metal structure and the reference electrode. A conventional measurement method is shown in FIG.
第３図において、上記照合電極Ｓを金属構造物の測定し
たい部分に接近させるには、先端に照合電極Ｓを取付け
たリート線１５を用意し、このり−ト線１５の外面にあ
らかしめ１ｍ毎に印を付け、この１ｍ毎に印の付いたり
一ト線１５を照合電極Ｓとともに水中に降下させ、目視
にて４印の付いた水深位置の長さまでリート線を降下さ
せたのち、リート線の降下を停止し、リート線１５の末
端と金属構造物との間に予め接続した電圧計■の値を目
視にて直読することにより、その水深における金属構造
物の電位を測定していた。In FIG. 3, in order to bring the reference electrode S close to the part of the metal structure that is desired to be measured, a Riet wire 15 with the reference electrode S attached to the tip is prepared, and a 1 m long wire is attached to the outer surface of the wire 15. Mark every 1m. Lower the wire 15 into the water together with the reference electrode S, visually lower the wire to the length of the water depth marked with 4 marks, and then The electric potential of the metal structure at that water depth was measured by stopping the line from descending and directly reading the value of the voltmeter (■) connected in advance between the end of the Riet wire 15 and the metal structure. .
しかしなから、上記１ｍ毎に印の付いたリード線先端に
照合電極を接続して水中に降下すると、海流または水流
のある場所では、降下した照合電極およびリード線は流
されてリード線は湾曲し、リード線の目盛と照合電極の
深さとが一致せず、ｍ１足した照合電極の水深位置と実
際の照合電極の水深位置とに誤差が生じ、また、波の高
い状況下では水面とリード線に付された目盛との一致点
か読み取れず、正確な水Ｒ位置をｎ１定することかでき
ないという課題かあった。さらに、リード線を第３図の
４印を付した所定位置毎に停止させて、電圧計の値を読
み取るために所定位置が多いときなどは、非常に煩雑な
作業となり、非能率的であるという課題もあった。However, if you connect a reference electrode to the tip of the lead wire marked every 1m and descend into the water, the lowered reference electrode and lead wire will be swept away and the lead wire will curve in places where there is an ocean current or water current. However, the scale of the lead wire and the depth of the reference electrode do not match, and there is an error between the water depth position of the reference electrode added by m1 and the actual water depth position of the reference electrode. There was a problem in that it was impossible to read the point that matched the scale marked on the line, and it was impossible to determine the exact water R position n1. Furthermore, when there are many predetermined positions in order to read the voltmeter value by stopping the lead wire at each predetermined position marked with 4 in Fig. 3, the work becomes extremely complicated and inefficient. There was also an issue.
そこで、本発明者等は、海流または水流に左右されるこ
となく正確かつ能率的に水深位置をＭｊ定することがで
きると同時にその水深位置の金属構造物の電位をも連続
的に測定することのできる測定装置を得べく研究を行っ
た結果、
水圧を感知することのできる圧力センサーを内蔵した照
合電極をリード線先端に接続し、上記圧力センサーを内
蔵した照合電極を水中に降下させると、上記海流または
水流によりリード線が湾曲すると否とに関係な（、正確
な水深位置と同時にその水深位置に対応した水面下金属
構造物の電位を測定することができ、さらにコンピュー
ター等と組合せることにより従来目視で測定していた水
深位置と電位値を連続的に測定できるという知見を得た
のである。Therefore, the inventors of the present invention have developed a method that can accurately and efficiently determine the water depth position Mj without being influenced by ocean currents or water currents, and at the same time continuously measure the potential of the metal structure at that water depth position. As a result of our research to create a measuring device that can detect water pressure, we found that by connecting a reference electrode with a built-in pressure sensor that can detect water pressure to the tip of a lead wire, and lowering the reference electrode with a built-in pressure sensor into the water, Regardless of whether or not the lead wire is bent by the ocean current or water current, it is possible to measure the potential of the underwater metal structure corresponding to the accurate water depth position at the same time as the accurate water depth position, and furthermore, it can be combined with a computer etc. This led to the discovery that water depth positions and potential values, which were conventionally measured visually, can be measured continuously.
この発明は、かかる知見にもとづいてなされたものであ
って、
水流入孔を有する水深センサー室および連続多孔質材か
らなる液絡部を有する電位センサー室を備えたリード線
のコネクターと接続できるケースと、
上記水深センサー室内に取付けられた水圧を感知する圧
力センサーと、
上記電位センサー室内に充填された電解質および上記電
位センサー室内に取付けられた電極からなる照合電極と
、
上記圧力センサーおよび照合電極をリード線に電気的に
接続することのできる防水コネクターと、からなる水面
下金属構造物の水深位置および電位測定装置に特徴を有
するものである。The present invention has been made based on this knowledge, and provides a case that can be connected to a lead wire connector, which is equipped with a water depth sensor chamber having a water inflow hole and a potential sensor chamber having a liquid junction made of a continuous porous material. A pressure sensor for sensing water pressure installed in the water depth sensor chamber, a reference electrode consisting of an electrolyte filled in the potential sensor chamber and an electrode installed in the potential sensor chamber, and a reference electrode for the pressure sensor and the reference electrode. This device is characterized by a waterproof connector that can be electrically connected to a lead wire, and a device for measuring the water depth position and potential of an underwater metal structure.
この発明の水面下金属構造物の水深位置および電位測定
装置を第１間断面図にもとづいて、さらに詳細に説明す
る。The underwater depth position and potential measuring device for an underwater metal structure according to the present invention will be explained in more detail based on a first sectional view.
水中を自然降下しやすくするために先端を鋭角になるよ
うに加工し、先端に鉛重り２を埋め込んたＰＶＣケース
１内に、水深センサー室４、電位センサー室１１、リー
ド線接続室１３を設ける。上記各室は、ねじ切り接続６
を施して補修のために開放が可能な構造とし、また絶縁
のための充填樹脂１７は補修可能な樹脂、例えばシリコ
ン樹脂等を使用する。A water depth sensor chamber 4, a potential sensor chamber 11, and a lead wire connection chamber 13 are provided in a PVC case 1 whose tip is processed to have an acute angle and a lead weight 2 is embedded in the tip to facilitate natural descent through the water. . Each chamber above has a threaded connection 6
The filling resin 17 for insulation is made of a repairable resin such as silicone resin.
上記水深センサー室４の側壁には、海水または河川水等
が自由に出入りできるように水流入孔３を設け、さらに
空気抜き孔３′を設けることにより水深センサー室４内
の空気を完全に抜くことができる。水中降下中に水流入
孔３から流入した流体は、圧力センサー５の圧力感知部
（図示せず）を加圧し、感知した圧力は電気信号に替え
られ、リード線１５を介して本体（図示せず）に送られ
る。A water inflow hole 3 is provided on the side wall of the water depth sensor chamber 4 so that seawater or river water can freely enter and exit, and an air vent hole 3' is also provided to completely evacuate the air inside the water depth sensor chamber 4. I can do it. The fluid flowing in from the water inflow hole 3 during descent into the water pressurizes the pressure sensing part (not shown) of the pressure sensor 5, and the sensed pressure is converted into an electrical signal and sent to the main body (not shown) via the lead wire 15. sent to ).
上記電位センサー室１１の側壁には、小孔に連続多孔質
材を充填してなる液絡部７が設けられている。この小孔
に充填された連続多孔質材としては、コルク、スポンジ
などの吸水性材が用いられる。The side wall of the potential sensor chamber 11 is provided with a liquid junction 7 formed by filling small holes with a continuous porous material. As the continuous porous material filled in the small pores, a water-absorbing material such as cork or sponge is used.
さらに上記電位センサー室１】の側壁には、ゴム栓９が
取付けられており、ゴム栓９を取りはずして電解質１２
を電位センサー室に充填し、予しめ取付けられていた電
極１０と組合されて照合電極を形成する。上記電解質と
電極とを組合せて形成される照合電極として、
ａ、白金／甘こう系照合電極
電解質・塩化カリウム溶液、
電 極二白金
す、銅／硫酸銅系照占電極
電解質：硫酸銅溶液、
電極：銅
Ｃ１銀≠
電解質：塩化カリウム溶液あるいは海水、電 極：銀−
塩化銀
ｄ、亜鉛／海水系照合電極
電解質：海水あるいは石こう、
電 極：亜鉛
などか知られており、この発明においても採用すること
かできる。しかし、この発明で用いる電極はこれらのみ
に限定されるものではない。Further, a rubber plug 9 is attached to the side wall of the potential sensor chamber 1, and the rubber plug 9 can be removed to remove the electrolyte 12.
is filled into the potential sensor chamber and combined with the previously attached electrode 10 to form a reference electrode. As a reference electrode formed by combining the above electrolyte and electrode, a. platinum/glucose-based reference electrode electrolyte/potassium chloride solution; electrode (ii) platinum; copper/copper sulfate-based reference electrode electrolyte: copper sulfate solution; Electrode: Copper C1 Silver≠ Electrolyte: Potassium chloride solution or seawater, Electrode: Silver-
Silver chloride d, zinc/seawater-based reference electrode electrolyte: seawater or gypsum, electrode: zinc, etc. are known, and can be employed in the present invention. However, the electrodes used in this invention are not limited to these.
上記水深センサー室４と電位センサー室■１とは樹脂１
７て区切られ、この樹脂１７は電極１０および配線保護
チューブ８を固定している。The above water depth sensor chamber 4 and potential sensor chamber ■1 are resin 1
7, and this resin 17 fixes the electrode 10 and the wiring protection tube 8.
上記配線保護チューブ８の内部を通る電極１０および圧
力センサー５からの配線Ｉ８は、リート線接続室１３て
リード線１５に接続される。上記リード線Ｉ５と電極ｌ
Ｏおよび圧力センサー５からの配線１８との接続部はソ
ケット等で接続し、樹脂等で固定する方が一層好ましい
。The wire I8 from the electrode 10 and the pressure sensor 5 passing through the inside of the wire protection tube 8 is connected to the lead wire 15 through the wire connection chamber 13. The above lead wire I5 and electrode l
It is more preferable that the connection portion between O and the wiring 18 from the pressure sensor 5 be connected with a socket or the like and fixed with resin or the like.
上記リード線接続室１３を形成するＰＶＣケース１もネ
ジ接続６とし、さらにリード線１５とＰＶＣケース１の
隙間から海水等が入らないように防水コネクター１４お
よびパツキン１６で密封する。The PVC case 1 forming the lead wire connection chamber 13 also has a screw connection 6, and is further sealed with a waterproof connector 14 and a packing 16 to prevent seawater from entering through the gap between the lead wire 15 and the PVC case 1.
このようにして作製されたこの発明の測定装置を、第２
図に示すように、上記リード線１５をコンピューターか
内蔵されている測定器Ｍに接続することにより、この発
明の圧力センサーおよび照合電極を組込んだ測定装置か
ら得られたデーターは自動的かつ連続的に補正および記
録などの処理がされる。The measuring device of the present invention manufactured in this way was
As shown in the figure, by connecting the lead wire 15 to a computer or built-in measuring device M, the data obtained from the measuring device incorporating the pressure sensor and reference electrode of the present invention can be automatically and continuously transmitted. Processing such as correction and recording is performed.
例えば、通常海面では約２ｍのモ満差がある。For example, at sea level, there is usually a difference of about 2 meters.
そこで、事前に潮汐表より時間と潮位との関係の近似式
をつくり、この近似式とｕｌｌ開開始時潮位とを測定器
に予め入力しておけば、時間経過に伴い水位を自動的に
補正することかできる。Therefore, if you create an approximate formula for the relationship between time and tide level from the tide table in advance and enter this approximate formula and the tide level at the start of the ULL opening into the measuring device in advance, the water level will be automatically corrected as time passes. I can do something.
上述の如き圧力センサーと照合電極を組込んだこの発明
の水深位置および電位測定装置を海洋上の金属構造物の
上から水面下に降ろし、圧力センサーにより得られた水
圧のデーターは水深に比例するところからコンピュータ
ー等を組込んた測定器により簡単に水深データーに変換
することができ、その際、水面に波があっても簡単に補
正することかでき、正確に照合電極の水深位置を測定す
ることかできると同時にその水深位置の電位も測定する
ことができるので、正確かつ能率的な水深位置と電位の
Ｍｊ定かできる。The water depth position and potential measuring device of the present invention, which incorporates the pressure sensor and reference electrode as described above, is lowered from above a metal structure on the ocean to below the water surface, and the water pressure data obtained by the pressure sensor is proportional to the water depth. From there, it can be easily converted into water depth data using a measuring device with a built-in computer, etc. At that time, even if there are waves on the water surface, it can be easily corrected, and the water depth position of the reference electrode can be accurately measured. Since it is possible to measure the electric potential at the water depth position at the same time, it is possible to accurately and efficiently determine the water depth position and the electric potential Mj.
この発明のＩｆＩＩｊ定装置を用いると、波、海流、水
流等による誤差を生ずることな〈従来よりも水面下の金
属構造物の水深位置と電位を同時かつ正確に測定するこ
とができ、さらにコンピューター等を組込んだ測定器と
接続することにより水７−２位置と電位を自動かつ連続
的にａｊ定することかでき、より正確にかつ能率的に水
面下金属構造物の防食管理を行うことかできる。By using the IfIIj determination device of this invention, it is possible to simultaneously and accurately measure the water depth position and potential of metal structures under the water surface without causing errors due to waves, ocean currents, water currents, etc. By connecting to a measuring device incorporating such as the above, the water 7-2 position and potential can be determined automatically and continuously, and corrosion protection management of underwater metal structures can be carried out more accurately and efficiently. I can do it.
第１図は、この発明の水深位置および電位測定装置の断
面図、
第２図は、この発明の水深位置および電（ｌｉｉｉｆｌ
１１定装置を測定器に接続し、水面下金属構造物の防食
管理を行っている状態を示す概略図、
第３図は、従来の水面下金属構造物の水深位置および電
位の測定方法を示す概略図である。
１・・・ＰＶＣケース、 ３・・・水流入孔、４
・・・水深センサー室、 ５・・圧力センサー、７・
・・液絡部、 １０・・・電 極、１１・・
・電位センサー室、 １２・・・電解質、１３・・・
リード線接続室、 １５・・・リード線、Ｍ：測定器
。
／１１
第 ２ 図
第 ３ 図FIG. 1 is a cross-sectional view of the water depth position and potential measuring device of the present invention, and FIG.
Figure 3 shows a conventional method for measuring the water depth position and potential of an underwater metal structure. It is a schematic diagram. 1...PVC case, 3...Water inflow hole, 4
...Water depth sensor chamber, 5..Pressure sensor, 7.
...liquid junction, 10...electrode, 11...
・Potential sensor chamber, 12...electrolyte, 13...
Lead wire connection chamber, 15...Lead wire, M: Measuring instrument. /11 Figure 2 Figure 3
Claims (1)
孔質からなる液絡部を有する電位センサー室を備えたリ
ード線のコネクターと接続できるケースと、 上記水深センサー室内に取付けられた水圧を感知する圧
力センサーと、 上記電位センサー室内に充填された電解質および上記電
位センサー室内に取付けられた電極からなる照合電極と
、 上記圧力センサーおよび照合電極をリード線に電気的に
接続することのできる防水コネクターと、からなること
を特徴とする水面下金属構造物の水深位置および電位測
定装置。(1) A case that can be connected to a lead wire connector that has a water depth sensor chamber with a water inflow hole and a potential sensor chamber with a liquid junction made of continuous porous material, and a water pressure sensor installed in the water depth sensor chamber. a reference electrode consisting of an electrolyte filled in the potential sensor chamber and an electrode attached to the potential sensor chamber; and a waterproof connector that can electrically connect the pressure sensor and the reference electrode to a lead wire. A water depth position and potential measuring device for an underwater metal structure, characterized in that the device comprises:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2309060A JP2515922B2 (en) | 1990-11-15 | 1990-11-15 | Water depth position and potential measuring device for underwater metal structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2309060A JP2515922B2 (en) | 1990-11-15 | 1990-11-15 | Water depth position and potential measuring device for underwater metal structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04181117A true JPH04181117A (en) | 1992-06-29 |
| JP2515922B2 JP2515922B2 (en) | 1996-07-10 |
Family
ID=17988397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2309060A Expired - Lifetime JP2515922B2 (en) | 1990-11-15 | 1990-11-15 | Water depth position and potential measuring device for underwater metal structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515922B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435176A (en) * | 2011-11-14 | 2012-05-02 | 上海交通大学 | Device and method for measuring response to fluctuating pressure of wind generated wave lakebed of shallow lake |
| JP2013019824A (en) * | 2011-07-13 | 2013-01-31 | Hioki Ee Corp | Detection system and survey system |
| CN110077548A (en) * | 2019-06-04 | 2019-08-02 | 中国人民解放军海军大连舰艇学院 | A kind of subaqueous survey device and dynamic draft measuring instrument |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101439485B1 (en) * | 2014-05-26 | 2014-09-17 | 주식회사 하이드로넷 | Multiple depth sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01124730U (en) * | 1988-02-19 | 1989-08-24 | ||
| JPH0216053U (en) * | 1988-07-15 | 1990-02-01 |
-
1990
- 1990-11-15 JP JP2309060A patent/JP2515922B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01124730U (en) * | 1988-02-19 | 1989-08-24 | ||
| JPH0216053U (en) * | 1988-07-15 | 1990-02-01 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013019824A (en) * | 2011-07-13 | 2013-01-31 | Hioki Ee Corp | Detection system and survey system |
| CN102435176A (en) * | 2011-11-14 | 2012-05-02 | 上海交通大学 | Device and method for measuring response to fluctuating pressure of wind generated wave lakebed of shallow lake |
| CN110077548A (en) * | 2019-06-04 | 2019-08-02 | 中国人民解放军海军大连舰艇学院 | A kind of subaqueous survey device and dynamic draft measuring instrument |
| CN110077548B (en) * | 2019-06-04 | 2023-10-24 | 中国人民解放军海军大连舰艇学院 | Underwater measurer and dynamic draft measurer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2515922B2 (en) | 1996-07-10 |
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