JPH0231185A - Method for searching embedded pipe - Google Patents
Method for searching embedded pipeInfo
- Publication number
- JPH0231185A JPH0231185A JP63182525A JP18252588A JPH0231185A JP H0231185 A JPH0231185 A JP H0231185A JP 63182525 A JP63182525 A JP 63182525A JP 18252588 A JP18252588 A JP 18252588A JP H0231185 A JPH0231185 A JP H0231185A
- Authority
- JP
- Japan
- Prior art keywords
- buried
- buried pipe
- embedded
- pipe
- hot air
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 238000007664 blowing Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000003595 mist Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は建築物のコンクリート壁、天井、床スラブ或い
は道路等に埋設した埋設管の探査方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for exploring buried pipes buried in concrete walls, ceilings, floor slabs, roads, etc. of buildings.
（従来の技術とその問題点）
従来、此種方法は目的の埋設管の露出部と発振器を電気
的に接続し、発振器から電流を流すことで同埋設管に磁
気を発生させ、その磁気を検知機により検知して埋設位
置を探査していた。(Conventional technology and its problems) Conventionally, this type of method electrically connects the exposed part of the target buried pipe to an oscillator, generates magnetism in the buried pipe by flowing current from the oscillator, and then removes the magnetism. The buried location was detected by a detector and searched.
ところが、この従来方法によれば、目的の埋設管に流し
た電流がその付近に埋設された他の埋設管、鉄筋等に短
絡し、これら埋設管、鉄筋等からも磁気が発生して目的
の埋設管の埋設位置が特定できなくなるという不具合が
生じていた。However, according to this conventional method, the current flowing through the target buried pipe short-circuits other buried pipes, reinforcing bars, etc. buried in the vicinity, and magnetism is generated from these buried pipes, reinforcing bars, etc. There was a problem that the buried position of the buried pipe could not be determined.
（発明が解決しようとする課題）
以上の問題点を解決する為の本発明の課題は、目的の埋
設管だけを所望の温度に上昇又は下降させその温度変化
を埋設箇所の表面部分にて検索して、他の埋設管、鉄筋
等に影響されることなく目的の埋設管の埋設位置を特定
することである。(Problem to be Solved by the Invention) The object of the present invention to solve the above problems is to raise or lower only the target buried pipe to a desired temperature and search for the temperature change on the surface part of the buried place. The objective is to identify the buried position of the target buried pipe without being influenced by other buried pipes, reinforcing bars, etc.
（課題を達成する為の手段）
以上の課題を達成する為の本発明の第一の手段は、埋設
管内に温風を吹込んで埋設管を加熱し、それに伴う埋設
箇所表面の温度分布の変化を赤外線走査装置により捉え
ることを特徴とスル。(Means for Achieving the Object) The first means of the present invention for achieving the above object is to blow hot air into the buried pipe to heat the buried pipe, and thereby change the temperature distribution on the surface of the buried part. The unique feature is that it is captured by an infrared scanning device.
また、本発明の第二の手段は、上記第一の手段における
温風に霧状の水を混入したことを特徴とする。Further, a second means of the present invention is characterized in that a mist of water is mixed into the warm air in the first means.
また、本発明の第三の手段は、上記第一の手段における
温風に代えて温水又は冷水を埋設管内に流入させること
を特徴とする。Further, a third means of the present invention is characterized in that hot water or cold water is caused to flow into the buried pipe instead of the hot air in the first means.
（作用）
上述した第一の手段によれば、温風によって加熱された
埋設管の熱が埋設箇所表面に伝達して同表面部分の赤外
線量を増加させ、その増加箇所を赤外線走査装置により
検索して埋設管の埋設位置を特定する。(Function) According to the first means described above, the heat of the buried pipe heated by the hot air is transferred to the surface of the buried place, increasing the amount of infrared rays on the surface, and the place of increase is searched by an infrared scanning device. to identify the buried position of the buried pipe.
また、第二の手段によれば、上述した作用に加え、温風
によって霧状の水を加熱して埋設管の温度を上昇させる
。Moreover, according to the second means, in addition to the above-mentioned effect, the temperature of the buried pipe is increased by heating the mist water with hot air.
さらに、第三の手段によれば、温水によって埋設管を加
熱して埋設箇所表面部分の赤外線■を増加させるか、又
は、冷水によって埋設管を冷却して埋設箇所表面部分の
赤外線量を低減させ、その増加或いは低減箇所を赤外線
走査装置により検索して埋設管の埋設位置を特定する。Furthermore, according to the third method, the buried pipe is heated with hot water to increase the amount of infrared rays on the surface of the buried place, or the buried pipe is cooled with cold water to reduce the amount of infrared rays on the surface of the buried place. , the location of the buried pipe is identified by searching for the location where it increases or decreases using an infrared scanning device.
（発明の効果）
本発明は以上の様に構成したことにより以下の効果を有
する。(Effects of the Invention) The present invention has the following effects by being configured as described above.
請求項１の方法によれば、目的の埋設管の近辺にある他
の埋設管、鉄筋等の温度が変化する虞れがなく、よって
他の埋設管、鉄筋等に影響されることなく目的の埋設管
の埋設位置を確実に特定することができる。According to the method of claim 1, there is no risk that the temperature of other buried pipes, reinforcing bars, etc. near the target buried pipe will change, and therefore the target buried pipe can be achieved without being affected by other buried pipes, reinforcing bars, etc. The buried position of the buried pipe can be reliably specified.
また、請求項２の方法によれば上記請求項１の効果に加
え、温風だけを吹込む場合に比べて埋設管を短時間で加
熱することができ、よって探査作業の作業性を向上する
ことができる。Further, according to the method of claim 2, in addition to the effect of claim 1, the buried pipe can be heated in a shorter time than when only hot air is blown, thereby improving the workability of exploration work. be able to.
さらに、請求項３の方法によれば上記請求項１の効果に
加え、温風に霧状の水を混入した場合に比べ熱量が大き
くなって埋設管の湿度をさらに短時間で目的の温度に変
化させることができ、よって探査作業をより短時間で行
うことができる。Furthermore, according to the method of claim 3, in addition to the effect of claim 1, the amount of heat is greater than when mist water is mixed into the hot air, and the humidity of the buried pipe can be brought to the target temperature in a shorter time. This allows the exploration work to be done in a shorter time.
（実施例） 以下本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
まず、第１図及び第２図に示す第一実施例について説明
すると、図中（１）は建築物のコンクリート壁、天井、
床スラブ或いは道路等の埋設部、（２）は埋設管、（３
）は赤外線走査装置で、埋設管（２）を加熱しその熱を
埋設部（１）表面に伝達させ同表面の温度分布を赤外線
走査装置（３）で検索するようになっている。First, to explain the first embodiment shown in Figs. 1 and 2, (1) in the figures shows concrete walls, ceilings,
Buried parts such as floor slabs or roads, (2) are buried pipes, (3
) is an infrared scanning device that heats the buried pipe (2), transmits the heat to the surface of the buried portion (1), and searches for the temperature distribution on the surface using the infrared scanning device (3).
埋設管（２）は埋設部（１）に埋設されたガス管で、そ
の埋設部分に連続する一方の露出部（２ａ）にはブロワ
（４）及び加熱装置（５）が取付けられ、他方露出部（
２ｂ）には吹出し箇所（不図示）を設けである。The buried pipe (2) is a gas pipe buried in the buried part (1), and a blower (4) and a heating device (5) are attached to one exposed part (2a) continuous with the buried part, and the other exposed part Department (
2b) is provided with a blowing point (not shown).
ブロワ（４）は先端に備えた吐出口（４ａ）から空気を
噴出する送風線で、吐出口（４ａ）を上記−方の露出部
（２ａ）に設けられたガスメータ取付口（２Ｃ）に連絡
して埋設管（２）に取付けられている。そして、吐出口
（４ａ）から吹出す噴出流（ａ＞を埋設管（２）内に流
入させ吹出し箇所から吹出すようになっている。The blower (4) is an air line that blows out air from a discharge port (4a) provided at its tip, and connects the discharge port (4a) to the gas meter installation port (2C) provided on the exposed portion (2a) on the negative side. and is attached to the buried pipe (2). Then, the jet stream (a>) blown out from the discharge port (4a) flows into the buried pipe (2) and is blown out from the blow-out location.
加熱装置（５）は、第２図に示す如く、埋設管（２）周
囲を囲む外筒（５ａ）と、その外筒（５ａ）の内外に配
設されて露出部（２ａ）を加熱する内外のヒータ（５ｂ
）とから形成されている。そして、露出部（２ａ）内を
通過する噴出流（ａ）を温風（ｂ）に変えて埋設管（２
）の埋設部分を加熱するようになっている。As shown in FIG. 2, the heating device (5) is disposed inside and outside of an outer cylinder (5a) surrounding the buried pipe (2) and the outer cylinder (5a) to heat the exposed portion (2a). Inner and outer heaters (5b
) and is formed from. Then, the jet flow (a) passing through the exposed part (2a) is changed into warm air (b) and the buried pipe (2a) is turned into hot air (b).
) is designed to heat the buried part.
ヒータ（５ｂ）は、埋設部（１）表面に伝達される埋設
管（２）の熱が、埋設部（１）表面にお【ノる埋設管（
２）直上部分（Ｃ）の温度をその周辺部分（（１）の温
度より０．１℃以上上昇させるに十分な熱放出機能を備
えている。The heater (5b) is configured so that the heat of the buried pipe (2) transmitted to the surface of the buried part (1) is transferred to the surface of the buried part (1).
2) It has a heat dissipation function sufficient to raise the temperature of the directly overhead portion (C) by 0.1° C. or more above the temperature of the surrounding portion ((1)).
赤外線走査装置（３）は、物体表面の赤外線量を検索し
て同表面における０、１℃以上の温度差をモニター（３
ａ）に映し出す周知の構造の装置で、埋設部（１）表面
の温度分布を検索して埋設管（２）の埋設位置を特定す
るようになっている。The infrared scanning device (3) searches for the amount of infrared rays on the surface of an object and monitors the temperature difference of 0.1℃ or more on the same surface (3).
The apparatus shown in (a) has a well-known structure and is designed to search for the temperature distribution on the surface of the buried part (1) to identify the buried position of the buried pipe (2).
而して、ブロワ（４）からの噴出流（ａ）を加熱装置（
５）によって温風（ｂ）に変えて埋設管（２）の埋設部
分を加熱し、その熱が埋設部（１）表面に伝わって同表
面における埋設管（２）直上部分（Ｃ）の温度がその周
辺部分（ｄ）より０．１℃以上上昇して同直上部分（Ｃ
）の赤外線量を周辺部分（ｄ）より増加させる。そして
、赤外線走査￥Ｒ置（３）によって埋設部（１）表面の
温度分布をモニター（３ａ）に映し出して前記直上部分
（Ｃ）を検索し、同部分（Ｃ）を埋設部（１）表面に記
入して埋設管（２）の埋設位置を特定する。The jet stream (a) from the blower (4) is then heated by the heating device (
5) heats the buried part of the buried pipe (2) by replacing it with hot air (b), and the heat is transmitted to the surface of the buried part (1), increasing the temperature of the part (C) directly above the buried pipe (2) on the same surface. is 0.1°C higher than the surrounding area (d) and the area directly above it (C
) increases the amount of infrared rays in the surrounding area (d). Then, the temperature distribution on the surface of the buried part (1) is displayed on the monitor (3a) by infrared scanning \R setting (3), the directly above part (C) is searched, and the same part (C) is placed on the surface of the buried part (1). to specify the buried position of the buried pipe (2).
尚、赤外線走査装置（３）による検索データをＩＣカー
ド等に記憶させそのデータに基づいて設計図面等に埋設
位置を記入することも可能である。Note that it is also possible to store search data obtained by the infrared scanning device (3) in an IC card or the like and write the buried position in a design drawing or the like based on the data.
本実施例においては、埋設管（２）をガス管としたが、
これに限定されず、給水管、排水管、その他の配管等に
おいても同様にその埋設位置を特定することができる。In this example, the buried pipe (2) was a gas pipe, but
The present invention is not limited to this, and the buried position of water supply pipes, drain pipes, other piping, etc. can be similarly specified.
次に第３図に示す第二実施例について説明する。Next, a second embodiment shown in FIG. 3 will be described.
この実施例は上述した第一実施例における温風（ｂ）に
霧状の水（７）を混入させた例で、図中（６）はミスト
（霧状の水）発生装置を示している。This example is an example in which mist water (7) is mixed into the warm air (b) in the first example described above, and (6) in the figure shows a mist (water mist) generator. .
ミスト発生装置（６）は、内部に水を貯溜しその液面上
の空間（６ａ）を埋設管（２）の流路における加熱５Ａ
＠＜５＞の下流側に連絡した密閉容器（６ｂ） 、この
密閉容器（６ｂ）の底部に設けられると共に発振ユニッ
ト（６Ｃ〉に連絡して密閉容器（６ｂ）内の水を振動さ
せる振動子（６ｄ）から形成されている。The mist generator (6) stores water inside and heats the space (6a) above the liquid level by 5A in the flow path of the buried pipe (2).
An airtight container (6b) connected to the downstream side of @<5>, a vibrator installed at the bottom of this airtight container (6b) and connected to the oscillation unit (6C) to vibrate the water in the airtight container (6b) (6d).
而して撮動子（６ｄ）を利用して密閉容器（６ｂ）内の
水をミスト化し、このミスト（７）が空間（６ａ）を通
過する温風（ｂ）に混入して加熱されると共に埋設管（
２）の埋設部分内へと流入して同部分を加熱し、埋設部
表面における埋設管直上部分の赤外線量をその周辺部分
より増加させる。Then, the water in the airtight container (6b) is made into a mist using the camera element (6d), and this mist (7) is mixed into the warm air (b) passing through the space (6a) and heated. along with buried pipes (
2) flows into the buried part and heats the part, increasing the amount of infrared rays in the part directly above the buried pipe on the surface of the buried part compared to the surrounding part.
そして、第一実施例同様、赤外線走査装置によって埋設
管の埋設位置を特定する。Then, as in the first embodiment, the buried position of the buried pipe is specified using an infrared scanning device.
この実施例においては霧状の水（７）を用いて埋設管（
２）を加熱しているので、温風（ｂ）だけを用いた場合
に比べ埋設管を短時間で加熱できる。In this example, a buried pipe (
2), the buried pipe can be heated in a shorter time than when only hot air (b) is used.
次に、第４図に示す第三実施例について説明する。この
実施例は上述した第一実施例における温風（ｂ）に代え
て温水（ｅ）を埋設管（２）内に流入させた例で、図中
（８）は循環路を示している。Next, a third embodiment shown in FIG. 4 will be described. This embodiment is an example in which hot water (e) is flowed into the buried pipe (2) instead of the hot air (b) in the first embodiment described above, and (8) in the figure indicates a circulation path.
循環路（８）は循環ホース（９）一端を埋設管（２）の
ガスメータ取付口（２Ｃ）に連絡し他端を吹出し箇所（
２ｃ’ ）に連絡し、この循環ホース（９）の中途部に
循環ポンプ（１０）及び温水（ｅ）を貯溜した温度調節
装置（１１）を設けて構成されている。The circulation path (8) connects one end of the circulation hose (9) to the gas meter installation port (2C) of the buried pipe (2), and connects the other end to the blowout point (
2c'), and a circulation pump (10) and a temperature control device (11) storing hot water (e) are provided in the middle of the circulation hose (9).
循環ポンプ（１０）は温度調節装置（１１）内の温水（
ｅ）を埋設管（２）内に流入させると共に循環ホース（
９）を介して温度調節袋＠ （１１）内へ戻すようにな
っている。The circulation pump (10) pumps hot water (
e) into the buried pipe (2) and the circulation hose (
9) and return into the temperature control bag @ (11).
温度調節装置（１１）は内部に渇水（ｅ）を貯溜した容
器（１２）内にコイル線（１３）を設け、このコイル線
（１３）を電源（１４）に接続して形成されており、コ
イル線（１３）によって温水（ｅ）を所望温度に保持す
るようになっている。コイル線（１３）は前述したヒー
タ（５ｂ）と同様の熱放出機能を備えている。The temperature control device (11) is formed by providing a coil wire (13) in a container (12) in which drought water (e) is stored, and connecting the coil wire (13) to a power source (14). The hot water (e) is maintained at a desired temperature by the coiled wire (13). The coil wire (13) has the same heat dissipation function as the heater (5b) described above.
而して、温度調節装置（１１）によって所望温度に保持
された温水（ｅ）を循環ポンプ（１０）によって埋設管
（２）内へ流入させて埋設管（２）の埋設部分を加熱し
、埋設部（１）表面における埋設管（２）直上部分（Ｃ
）の赤外線量をその周辺部分（ｄ）より増加させる。そ
して、第一実施例同様、赤外線走査装置（３）によって
埋設管（２）の埋設位置を特定する。Then, the hot water (e) maintained at a desired temperature by the temperature control device (11) is caused to flow into the buried pipe (2) by the circulation pump (10) to heat the buried portion of the buried pipe (2), The part directly above the buried pipe (2) on the surface of the buried part (1) (C
) increases the amount of infrared rays in the surrounding area (d). Then, as in the first embodiment, the buried position of the buried pipe (2) is specified by the infrared scanning device (3).
また、この実施例においては、上述したコイル線（１３
）、電源（１４）に代えて所望の冷却手段（不図示）を
設け、この冷却手段によって温水（ｅ）を所望温度の冷
水に変えて埋設管（２）の埋設部を冷却し、埋設部（１
）表面における埋設管（２）直上部分（Ｃ）の赤外線量
をその周辺部分（ｄ）より低減させ、赤外線走査装置（
不図示）によって同部分（Ｃ）を検索することも可能で
ある。In addition, in this embodiment, the above-mentioned coil wire (13
), a desired cooling means (not shown) is provided in place of the power source (14), and this cooling means converts the hot water (e) into cold water of a desired temperature to cool the buried part of the buried pipe (2), and cools the buried part of the buried pipe (2). (1
) The amount of infrared rays directly above the buried pipe (2) (C) on the surface is reduced compared to the surrounding area (d), and the infrared scanning device (
It is also possible to search for the same portion (C) using the search method (not shown).
尚、その際、冷却手段に、埋設管（２）直上部分（Ｃ）
の温度をその周辺部分（（ｊ）より０・１℃以上下げる
に十分な冷却機能を持たせることは云うまでもない。In addition, in that case, the part (C) directly above the buried pipe (2) is used as the cooling means.
Needless to say, it should have a cooling function sufficient to lower the temperature of the surrounding area ((j) by 0.1°C or more).
この実施例においては、温水（ｅ）又は冷水を用いて埋
設管（２）を加熱又は冷却するので、温風に霧状の水を
混入する場合に比べ熱量が大きくなって埋設管の温度を
さらに短時間で目的の温度に変化させることができる。In this embodiment, the buried pipe (2) is heated or cooled using hot water (e) or cold water, so the amount of heat is greater than when mist water is mixed with warm air, and the temperature of the buried pipe is lowered. Furthermore, the temperature can be changed to the desired temperature in a shorter time.
第１図及び第２図、第３図、第４図は夫々本発明の実施
例を示し、第１図は埋設管の露出部にブロワ及び加熱装
置を取付は埋設部表面の温度分布を赤外線走査装置で検
索する状態の正面図、第２図は第１図の（２）−（２）
線拡大断面図、第３図は埋設管に連絡するミスト発生装
置の拡大断面図、第４図は埋設管の露出部に温水を流入
させるポンプを連絡した状態の正面図である。
尚、図中
埋設管：（２） 温風＝（ｂ）赤外線走査装置
＝（３） 埋設箇所＝（１）霧状の水：（７）
とする。
温水：
（ｅ）
西部瓦斯株式会社
第
図
第
図Figures 1, 2, 3, and 4 show embodiments of the present invention, and Figure 1 shows the temperature distribution on the surface of the buried pipe when a blower and heating device are installed on the exposed part of the buried pipe. A front view of the state being searched by the scanning device, Figure 2 is (2)-(2) in Figure 1.
FIG. 3 is an enlarged cross-sectional view of the mist generator connected to the buried pipe, and FIG. 4 is a front view of a state in which a pump for flowing hot water into the exposed portion of the buried pipe is connected. In the figure, buried pipe: (2) Warm air = (b) Infrared scanning device = (3) Buried location = (1) Mist water: (7). Hot water: (e) Seibu Gas Co., Ltd.
Claims (3)
に伴う埋設箇所表面の温度分布の変化を赤外線走査装置
により捉えることを特徴とする埋設管の探査方法。(1) A buried pipe exploration method characterized by blowing warm air into the buried pipe to heat the buried pipe, and detecting the accompanying change in temperature distribution on the surface of the buried part using an infrared scanning device.
求項１記載の埋設管の探査方法。(2) The buried pipe exploration method according to claim 1, characterized in that a mist of water is mixed into the warm air.
埋設管を加熱又は冷却することを特徴とする請求項１記
載の埋設管の探査方法。(3) The buried pipe exploration method according to claim 1, characterized in that the buried pipe is heated or cooled by flowing hot water or cold water into the buried pipe instead of hot air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63182525A JPH0231185A (en) | 1988-07-20 | 1988-07-20 | Method for searching embedded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63182525A JPH0231185A (en) | 1988-07-20 | 1988-07-20 | Method for searching embedded pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0231185A true JPH0231185A (en) | 1990-02-01 |
| JPH0541951B2 JPH0541951B2 (en) | 1993-06-25 |
Family
ID=16119830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63182525A Granted JPH0231185A (en) | 1988-07-20 | 1988-07-20 | Method for searching embedded pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0231185A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006528777A (en) * | 2004-02-14 | 2006-12-21 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Measurement method and apparatus for position search of an object confined in a medium |
| JP2009014532A (en) * | 2007-07-05 | 2009-01-22 | Hitachi Ltd | Buried piping route retrieval system and buried piping route retrieval method |
| JP2017138235A (en) * | 2016-02-04 | 2017-08-10 | 三菱重工業株式会社 | Identifying system, vibration generating device, and identifying method |
-
1988
- 1988-07-20 JP JP63182525A patent/JPH0231185A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006528777A (en) * | 2004-02-14 | 2006-12-21 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Measurement method and apparatus for position search of an object confined in a medium |
| JP2009014532A (en) * | 2007-07-05 | 2009-01-22 | Hitachi Ltd | Buried piping route retrieval system and buried piping route retrieval method |
| JP2017138235A (en) * | 2016-02-04 | 2017-08-10 | 三菱重工業株式会社 | Identifying system, vibration generating device, and identifying method |
| WO2017134849A1 (en) * | 2016-02-04 | 2017-08-10 | 三菱重工業株式会社 | Identification system, vibration-generating device, and identification method |
| TWI649763B (en) * | 2016-02-04 | 2019-02-01 | 日商三菱重工業股份有限公司 | Identification system, vibration generating device and identification method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0541951B2 (en) | 1993-06-25 |
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