JPH02120042U - - Google Patents
Info
- Publication number
- JPH02120042U JPH02120042U JP2999689U JP2999689U JPH02120042U JP H02120042 U JPH02120042 U JP H02120042U JP 2999689 U JP2999689 U JP 2999689U JP 2999689 U JP2999689 U JP 2999689U JP H02120042 U JPH02120042 U JP H02120042U
- Authority
- JP
- Japan
- Prior art keywords
- filament
- fiber
- rod
- strain detection
- rubber
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 7
- 229920001971 elastomer Polymers 0.000 claims 5
- 239000005060 rubber Substances 0.000 claims 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims 4
- 239000011151 fibre-reinforced plastic Substances 0.000 claims 4
- 229920001169 thermoplastic Polymers 0.000 claims 3
- 238000007765 extrusion coating Methods 0.000 claims 2
- 239000000463 material Substances 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 2
- 239000004033 plastic Substances 0.000 claims 2
- 229920003023 plastic Polymers 0.000 claims 2
- 239000012209 synthetic fiber Substances 0.000 claims 2
- 229920002994 synthetic fiber Polymers 0.000 claims 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000011253 protective coating Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000253 optical time-domain reflectometry Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 2
- 210000001577 neostriatum Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
第１図乃至第７図はこの考案のよる歪検知用光
センサの各実施例の構成の概略を示す図、第８図
歪測定装置の全体概略図、第９図はＯＴＤＲの概
略構成を示す図、第１０図はＯＴＤＲによる後方
散乱光強度の変化を示す図、第１１図ａは本考案
の歪検知用光センサによる測定方法の概略を示す
図、第１１図ｂ，ｃは従来の光フアイバによる測
定方法及びこれによる測定結果（後方散乱光の伝
送ロスの変化）を示す図、第１２図ａ，ｂは従来
の光フアイバの縦断面図及びその適宜位置におけ
る横断面図である。
１……棒状線材、１ａ……中心線条体、２……
線条体（下巻）、２′……スパイラル突起、３…
…光フアイバ、４……線条体（上巻）、５……保
護層。
Figures 1 to 7 are diagrams showing the outline of the configuration of each embodiment of the optical sensor for strain detection according to this invention, Figure 8 is a general schematic diagram of the strain measuring device, and Figure 9 is a diagram showing the schematic configuration of the OTDR. Figures 10 and 10 are diagrams showing changes in backscattered light intensity by OTDR, Figure 11a is a diagram showing an outline of the measurement method using the optical sensor for strain detection of the present invention, and Figures 11b and c are diagrams showing the change in backscattered light intensity by OTDR. FIGS. 12a and 12b are diagrams showing a measurement method using a fiber and measurement results (changes in transmission loss of backscattered light). 1... Rod-shaped wire rod, 1a... Central striatum, 2...
Striatum (lower volume), 2'... spiral projection, 3...
...Optical fiber, 4...Striatal body (Volume 1), 5...Protective layer.
Claims (1)
等から成る棒状線材の上に、接着等防止用保護被
膜を被せた未硬化又は半硬化の繊維強化プラチツ
クの線条体を下巻として所定のピツチで螺旋状に
巻回し、その上に光フアイバをその長手方向に沿
つて縦設し、そらにその上に前記下巻と同じ線条
体を上巻として下巻に対して半ピツチずらした所
定のピツチで螺旋状に巻回し、これら長尺体を加
熱して線条体を硬化させて成る歪検知用センサ。 (2) 前記棒状線材の軸心部に繊維強化プラスチ
ツクの中心線条体を設けたことを特徴とする請求
項１に記載の歪検知用センサ。 (3) 熱可塑性プラスチツク、ゴム等の管、丸棒
等から成る棒状線材の上に、金属線、ゴム、プラ
スチツク、合成繊維等から成る紐又は糸等の線条
体を所定のピツチで螺旋状に巻回し、その上に光
フアイバをその長手方向に沿つて縦添し、前記長
尺体の上に押出し被覆による保護層を設けて成る
歪検知用センサ。 (4) 前記棒状線材の軸心部に繊維強化プラスチ
ツクの中心線条体を設けたことを特徴とする請求
項３に記載の歪検知用センサ。 (5) 前記線条体に代えて、接着防止用保護層を
被せた未硬化又は半硬化の繊維強化プラスチツク
の線条体を巻回し、前記棒状線材、線条体を加熱
して線条体を硬化させ、その上に光フアイバをそ
の長手方向に沿つて縦添し、前記長尺体の上に押
出し被覆による保護層を設けて成る請求項３に記
載の歪検知用センサ。 (6) 熱可塑性プラスチツク、ゴム等の管、丸棒
等から成る棒状線材の上に、金属線、ゴム、プラ
スチツク、合成繊維等から成る紐又は糸等の線条
体を下巻として所定のピツチで螺旋状に巻回し、
その上に光フアイバをその長手方向に沿つて縦添
し、さらにその上に前記下巻と同じ線条体を上巻
として下巻に対して半ピツチずらした所定のピツ
チで螺旋状に巻回し、上記長尺体の上に押出し被
覆による保護層を設けて成る歪検知用光センサ。[Scope of Claim for Utility Model Registration] (1) Uncured or semi-cured fiber-reinforced plastic made of thermoplastic plastic, rubber tube, round bar, etc., covered with a protective coating to prevent adhesion, etc. The filament is wound spirally at a predetermined pitch as a lower winding, an optical fiber is placed vertically along the longitudinal direction on top of the filament, and the same filament as the lower winding is placed on top of the filament as an upper winding for the lower winding. The strain detection sensor is made by spirally winding the elongate body at a predetermined pitch shifted by half a pitch, and heating the elongated body to harden the filament body. (2) The strain detection sensor according to claim 1, characterized in that a central filament made of fiber-reinforced plastic is provided at the axial center of the rod-like wire. (3) A striated body such as a string or thread made of metal wire, rubber, plastic, synthetic fiber, etc. is spirally formed at a predetermined pitch on top of a rod-shaped wire material made of a tube, round bar, etc. of thermoplastic plastic, rubber, etc. A strain detection sensor comprising: a long body wound around the long body, an optical fiber vertically attached thereon along the longitudinal direction, and a protective layer formed by extrusion coating provided on the long body. (4) The strain detection sensor according to claim 3, characterized in that a central filament made of fiber-reinforced plastic is provided at the axial center of the rod-like wire. (5) Instead of the filament, a filament made of uncured or semi-cured fiber-reinforced plastic covered with a protective layer for preventing adhesion is wound, and the rod-like wire rod and filament are heated to form a filament. 4. The strain detection sensor according to claim 3, wherein the elongated body is cured, an optical fiber is vertically attached thereon along the longitudinal direction, and a protective layer formed by extrusion coating is provided on the elongated body. (6) A striated body such as a string or string made of metal wire, rubber, plastic, synthetic fiber, etc. is wrapped around a rod-shaped wire material made of a tube, round bar, etc. made of thermoplastic plastic, rubber, etc. at a specified pitch. Wrap it in a spiral,
On top of that, an optical fiber is vertically attached along its longitudinal direction, and on top of that, the same filament as the lower winding is wound spirally at a predetermined pitch shifted by half a pitch from the lower winding. An optical sensor for strain detection consisting of a protective layer made of extruded coating on the length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2999689U JPH02120042U (en) | 1989-03-15 | 1989-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2999689U JPH02120042U (en) | 1989-03-15 | 1989-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02120042U true JPH02120042U (en) | 1990-09-27 |
Family
ID=31254665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2999689U Pending JPH02120042U (en) | 1989-03-15 | 1989-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02120042U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020204212A (en) * | 2019-06-18 | 2020-12-24 | 鹿島建設株式会社 | Linear body installation device, and linear body installation method |
-
1989
- 1989-03-15 JP JP2999689U patent/JPH02120042U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020204212A (en) * | 2019-06-18 | 2020-12-24 | 鹿島建設株式会社 | Linear body installation device, and linear body installation method |
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