JPS6370132A - Method for measuring cable laying tension and cable laying tension detector - Google Patents
Method for measuring cable laying tension and cable laying tension detectorInfo
- Publication number
- JPS6370132A JPS6370132A JP61215455A JP21545586A JPS6370132A JP S6370132 A JPS6370132 A JP S6370132A JP 61215455 A JP61215455 A JP 61215455A JP 21545586 A JP21545586 A JP 21545586A JP S6370132 A JPS6370132 A JP S6370132A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- series
- tension
- elements
- detector
- 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
- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 239000013307 optical fiber Substances 0.000 abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 2
- 238000005452 bending Methods 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、ケーブル布設時におけるケーブル張力測定
方法及びその方法の実施の際に使用する張力検出器に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for measuring cable tension during cable installation and a tension detector used in carrying out the method.
電カケープル布設時における従来の張力測定方法を第１
図に基づいて説明する。ケーブル１は一方のマンホール
２の地上に設置したケーブルドラム３から管路４に送り
込まれ、その先端に連結したけん引ワイヤ５により、他
方のマンホール６の金車７を経て地上のウィンチ８によ
りけん引される。張力計９は上記のマンホール６内にお
いて金車７の支持ワイヤ１０の途中に介在される。ウィ
ンチ８によりケーブル１をけん引すると、ワイヤ５に作
用する張力の大きさが張力計９により計測される。The conventional method of measuring tension when installing power cables is the first method.
This will be explained based on the diagram. The cable 1 is fed into a conduit 4 from a cable drum 3 installed on the ground in one manhole 2, and is pulled by a winch 8 on the ground via a pull wire 5 connected to the tip of the cable via a metal wheel 7 in the other manhole 6. Ru. The tension gauge 9 is interposed in the middle of the support wire 10 of the metal wheel 7 in the manhole 6 described above. When the cable 1 is towed by the winch 8, the magnitude of the tension acting on the wire 5 is measured by the tension meter 9.
光ファイバケーブルは許容張力が小さいため、その布設
時においてはこれに過大な張力がかかることを防止する
必要がある。そのため、ケーブルに実際にかかっている
張力を測定しなければならない。Since optical fiber cables have a small allowable tension, it is necessary to prevent excessive tension from being applied to them during installation. Therefore, the actual tension on the cable must be measured.
ところが、前記のごとき従来の測定方法によると、張力
計９がワイヤ５の張力を測定することになる。しかし、
ワイヤ５の張力は管路４の屈曲その他の条件によりケー
ブル１の張力とは必ずしも一致しないため、従来の方法
ではケーブル１の張力を正確に把握できない問題がある
。However, according to the conventional measurement method as described above, the tension meter 9 measures the tension of the wire 5. but,
Since the tension of the wire 5 does not necessarily match the tension of the cable 1 due to the bending of the conduit 4 and other conditions, there is a problem in that the tension of the cable 1 cannot be accurately determined by the conventional method.
ケーブル１の張力を直接測定するには、ケーブル１の先
端に直接張力計を取付ければよいが、管路４の内部を通
過しうる適当な張力計は従来存在しない。In order to directly measure the tension in the cable 1, a tension meter may be attached directly to the tip of the cable 1, but no suitable tension meter that can pass through the inside of the conduit 4 has conventionally existed.
そこで、この発明は新規な張力検出器を用いてケーブル
の張力を正確に測定することを目的とするものである。Therefore, an object of the present invention is to accurately measure cable tension using a new tension detector.
上記の問題点を解決する張力測定方法として、この発明
は金属パイプ復起わい管外周面に中心対称かつ９０度位
置を異にして２組計４個の歪検出素子を取付け、上記歪
検出素子を各組ごとに直列接続するとともに各組の直列
素子を並列接続することにより直並列回路を構成し、上
記起わい管の一端を筒状の検出器本体の内部に固定し、
他端をケーブルの鋼芯に固着し、上記検出器の先端にけ
ん引ワイヤを連続し、ワイヤによりケーブルをけん引し
ながら上記の直並列回路の両端から検出信号を外部に取
出し記録するようにしたものである。As a tension measurement method that solves the above problems, the present invention provides two sets of four strain detecting elements, which are centrally symmetrical and spaced apart by 90 degrees, on the outer circumferential surface of a rectangular metal pipe. A series-parallel circuit is constructed by connecting each set in series and connecting the series elements of each set in parallel, and one end of the erect tube is fixed inside a cylindrical detector body,
The other end is fixed to the steel core of the cable, a traction wire is connected to the tip of the detector, and while the cable is being towed by the wire, detection signals are taken out from both ends of the series-parallel circuit and recorded. It is.
また、上記測定方法に使用する張力検出器は、金属パイ
プ復起わい管の外周面に中心対称かつ９０度位置を異に
して２＆ｌｌ計４個の歪検出素子を取付け、上記歪検出
素子を各組ごとに直列接続するとともに各組の直列素子
を並列接続して直並列回路を形成し、上記起わい管の一
端を筒状の検出本体の内部に固定し、検出器本体の一端
にけん引部を形成するとともに、上記起わい管の他端に
ケーブル鋼芯の固定部を設けた構成としたものである。In addition, the tension detector used in the above measurement method has a total of 4 strain detection elements (2 & 1) mounted on the outer peripheral surface of a metal pipe with a center symmetry and 90 degrees different positions. Each group is connected in series and the series elements of each group are connected in parallel to form a series-parallel circuit, one end of the above-mentioned erect tube is fixed inside a cylindrical detection body, and a traction part is attached to one end of the detector body. , and a fixing portion for the cable steel core is provided at the other end of the erect tube.
第２図は張力測定方法の実施に使用する張力検出器の一
例を示すものである。この検出器は、円筒状本体１１の
先端に小径部１２を形成し、その部分にキャップ１３を
ねし結合するとともに、キャップ１３の先端にけんワイ
ヤの連結用孔１４が形成される。FIG. 2 shows an example of a tension detector used to carry out the tension measurement method. This detector has a small diameter part 12 formed at the tip of a cylindrical main body 11, a cap 13 is screwed onto the small diameter part 12, and a hole 14 for connecting a wire is formed at the tip of the cap 13.
本体１１の内部に挿入されるステンレス製起わい管１５
の外周面には、第３図に示すように、中心対称の位置に
貼着される２個１組のストレーンゲージ等の歪検出素子
１６を９０度位置を異にして２組、合計４個設けている
。これらの各歪検出素子１６は、第４図に示すように、
電気的には各組ごとに直列に接続され、各組の直列素子
を並列に接続してなる直並列回路１７を構成するように
接続される。A stainless steel riser tube 15 inserted into the main body 11
As shown in FIG. 3, on the outer peripheral surface of the It is set up. Each of these strain detection elements 16, as shown in FIG.
Electrically, each set is connected in series, and the series elements of each set are connected in parallel to form a series-parallel circuit 17.
上記起わい管１５の一端部の内周にはネジ１８が形成さ
れ、これにボルト１９が螺入される。ボルト１９は零化
１１の小径部１２を貫通し、その貫通部分の外周に絶縁
チューブ２０を嵌めるとともに、小径部１２両端の段部
に絶縁ワッシャ２１をそれぞれ嵌合し、起わい管１５の
一端を一方のワッシャ２１に当てる。またボルト１９の
先端にナツト２１′を螺合して他方のワッシャ２１を挟
圧する。A thread 18 is formed on the inner periphery of one end of the riser tube 15, into which a bolt 19 is screwed. The bolt 19 passes through the small diameter portion 12 of the zeroing 11, and an insulating tube 20 is fitted to the outer periphery of the penetrating portion, and insulating washers 21 are fitted to the steps at both ends of the small diameter portion 12, and one end of the raised tube 15 is fitted. to one washer 21. Further, a nut 21' is screwed onto the tip of the bolt 19 to clamp the other washer 21.
一方、起わい管１５の他端内周にもネジ２２が形成され
、そのネジ２２にネジ筒２３が螺合される。このネジ筒
２３には、光フアイバケーブル２４の口芯２５が挿通さ
れ、その先端に圧着端子２６を一体化することにより鋼
芯２５の抜は出しを阻止している。On the other hand, a thread 22 is also formed on the inner periphery of the other end of the riser tube 15, and a threaded cylinder 23 is screwed into the thread 22. A core 25 of an optical fiber cable 24 is inserted into the threaded tube 23, and a crimp terminal 26 is integrated at the tip of the core to prevent the steel core 25 from being pulled out.
また、本体１１の他端内周にネジ２７が形成され、その
ネジ２７にスペーサとしてのネジ筒２８が螺入されてい
る。このネジ筒２８にケーブル２４の端部が挿入される
。Further, a screw 27 is formed on the inner periphery of the other end of the main body 11, and a threaded cylinder 28 serving as a spacer is screwed into the screw 27. The end of the cable 24 is inserted into this threaded tube 28.
前記の歪検出素子１６の直並列回路１７の一端は、リー
ド線２９によって上記のネジ筒２３に半田付けされ、ま
た同回路１７の他端は他のリード線３０によってケーブ
ル２４の遮へい層３１に単口］付けされている。One end of the series/parallel circuit 17 of the strain detection element 16 is soldered to the screw cylinder 23 by a lead wire 29, and the other end of the circuit 17 is soldered to the shielding layer 31 of the cable 24 by another lead wire 30. [single mouth] is attached.
一方、ケーブル２４の元端側における計測記録部は、第
４図に示すように直流ブリッジ回路３２を有し、そのプ
リフジ回路３２に動ひすみ測定器３３を接続するととも
に、その測定器３３に記録計３４を接続している。ブリ
ッジ回路３２の一部には、ケーブル２４の鋼芯２５及び
遮へい層３１を接続し、前記の直並列回路１７がブリフ
ジ回路３２の一部を構成するようになっている。On the other hand, the measurement recording section on the base end side of the cable 24 has a DC bridge circuit 32 as shown in FIG. A recorder 34 is connected. The steel core 25 and shielding layer 31 of the cable 24 are connected to a part of the bridge circuit 32, so that the series-parallel circuit 17 forms part of the bridge circuit 32.
この発明の実施例は以上のごときものであり、張力検出
器をケーブル２４の先端に装着し、その連結用孔１４に
ワイヤ３５を連結すると、ケーブル２４先端における張
力によって歪検出素子１６の電気抵抗が変化するため、
その変化量を測定器３３において電気信号に変換表示す
るとともにこれを記録計３４において記録する。The embodiment of the present invention is as described above, and when the tension detector is attached to the tip of the cable 24 and the wire 35 is connected to the connection hole 14, the electric resistance of the strain detection element 16 is changed due to the tension at the tip of the cable 24. changes, so
The measuring device 33 converts the amount of change into an electrical signal and displays it, and the recorder 34 records this.
ところで、上記の検出器は管路が真直ぐである場合はケ
ーブル２４の張力をそのまま検出するので問題ないが、
管路に屈曲部分があると検出器本体１１にも曲げ力が作
用し、ケーブル２４そのものには印加されていない張力
が検出される可能性がある。By the way, if the conduit is straight, the above detector detects the tension of the cable 24 as it is, so there is no problem.
If there is a bent portion in the conduit, bending force will also act on the detector main body 11, and tension that is not applied to the cable 24 itself may be detected.
しかし、この発明においては、歪検出素子１６が前記の
ように中心対称かつ９０度位Ｗ！：を異にして２組計４
個を起わい管１５の外周に取付けている。However, in the present invention, the strain detection element 16 is centrally symmetrical and approximately 90 degrees W! as described above. : 2 sets with different numbers, total 4
are attached to the outer periphery of the riser tube 15.
いま、第３図のＡ−Ａ線の方向にわん曲する歪みを受け
たとすると、一方の素子１６が伸張するとともに他方の
素子１６が収縮するため、前者の電気抵抗が増大するが
、後者の電気抵抗は減少するので、相殺され合成抵抗値
は変化しない。Ｂ−Ｂ線の方向のわん曲を受けた場合も
同様である。Now, if we assume that the element 16 is subjected to a bending strain in the direction of line A-A in FIG. Since the electrical resistance decreases, they cancel each other out and the combined resistance value does not change. The same applies to the case of bending in the direction of line B-B.
なお、Ａ−Ａ線とＢ−Ｂ線の中間的な方向への歪みもあ
りうるが、この場合も一方が伸張傾向となり他方が収縮
傾向となるため相殺される。Note that there may be distortion in a direction intermediate between the A-A line and the B-B line, but in this case as well, one tends to expand and the other tends to contract, so they are canceled out.
上記の実施例は、直並列回路１７の両端の信号をケーブ
ル２４の鋼芯２５と遮へい層３１とを利用してドラム側
に引出すようにしているが、けん引ワイヤ３５に沿って
信号線を設け、その信号線によってウィンチ側に引出す
ようにしてもよい。In the above embodiment, the signals at both ends of the series/parallel circuit 17 are extracted to the drum side using the steel core 25 and the shielding layer 31 of the cable 24, but a signal line is provided along the traction wire 35. , the signal line may be used to lead out to the winch side.
以上のように、この発明の測定方法によるとケーブルに
作用する張力を直接測定することができる効果がある。As described above, the measuring method of the present invention has the advantage that the tension acting on the cable can be directly measured.
また、その測定の際に用いる検出器は、歪検出素子が中
心対称かつ９０度位置を異にして取付けられ、しかも小
形に形成されるので、ケーブルの先端において管路の屈
曲の影響路受けることがなく、ケーブル先端における張
力を直接検出することができろ効果がある。In addition, the detector used for this measurement has strain detection elements that are centrally symmetrical and mounted at different positions by 90 degrees, and is compact, so the tip of the cable is not affected by the bending of the conduit. This is effective because the tension at the end of the cable can be directly detected.
第１図は従来の測定方法を示す断面図、第２図は実施例
の一部拡大断面図、第３図は第２図の■−■線の断面図
、第４図は一部省略した実施例の電気回路図である。
１１・・・・・・本体、１４・・・・・・連結用孔、１
５・・・・・・起わい管、１６・・・・・・歪検出素子
、１７・・・・・・直並列回路、１８・・・・・・ネジ
、１Ｓ・・・・・・ボルト、２１′・・・・・・ナツト
、２３・・・・・・ネジ筒、２４・・・・・・電カケー
プル１．２５・・・・・・鋼芯、２６・・・・・・圧着
端子、２８・・・・・・ネジ筒、２９．３０・・・・・
・リード線、３１・・・・・・遮へい層、３５・・・・
・・ワイヤ。Figure 1 is a sectional view showing the conventional measurement method, Figure 2 is a partially enlarged sectional view of the embodiment, Figure 3 is a sectional view taken along the line ■-■ in Figure 2, and Figure 4 is partially omitted. FIG. 3 is an electrical circuit diagram of an example. 11...Main body, 14...Connection hole, 1
5... Ear tube, 16... Strain detection element, 17... Series/parallel circuit, 18... Screw, 1S... Bolt. , 21'...Nut, 23...Threaded cylinder, 24...Electric cable 1.25...Steel core, 26...Crimp Terminal, 28...Screw tube, 29.30...
・Lead wire, 31... Shielding layer, 35...
...Wire.
Claims (2)
度位置を異にして２組計４個の歪検出素子を取付け、上
記歪検出素子を各組ごとに直列接続するとともに各組の
直列素子を並列接続することにより直並列回路を構成し
、上記起わい管の一端を筒状の検出器本体の内部に固定
し、他端をケーブルの鋼芯に固着し、上記検出器の先端
にけん引ワイヤを連続し、ワイヤによりケーブルをけん
引しながら上記の直並列回路の両端から検出信号を外部
に取出し記録することを特徴とするケーブル布設張力の
測定方法。(1) Center-symmetrical and 90 mm on the outer circumferential surface of the raised metal pipe
A total of four strain sensing elements are installed in two sets at different positions, and the strain sensing elements are connected in series for each set, and the series elements of each set are connected in parallel to form a series-parallel circuit. One end of the riser tube is fixed inside the cylindrical detector body, the other end is fixed to the steel core of the cable, a traction wire is connected to the tip of the detector, and the cable is pulled by the wire while the above A method for measuring cable installation tension characterized by extracting and recording detection signals from both ends of a series-parallel circuit.
０度位置を異にして２組計４個の歪検出素子を取付け、
上記歪検出素子を各組ごとに直列接続するとともに各組
の直列素子を並列接続して直並列回路を形成し、上記起
わい管の一端を筒状の検出本体の内部に固定し、検出器
本体の一端にけん引部を形成するとともに、上記起わい
管の他端にケーブル鋼芯の固定部を設けたことを特徴と
するケーブル布設張力検出器。(2) Centrally symmetrical and 9
A total of four strain detection elements are installed in two sets at different 0 degree positions,
The strain detection elements are connected in series for each set, and the series elements of each set are connected in parallel to form a series-parallel circuit. A cable laying tension detector, characterized in that a traction part is formed at one end of the main body, and a fixing part for a cable steel core is provided at the other end of the erect tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61215455A JPS6370132A (en) | 1986-09-11 | 1986-09-11 | Method for measuring cable laying tension and cable laying tension detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61215455A JPS6370132A (en) | 1986-09-11 | 1986-09-11 | Method for measuring cable laying tension and cable laying tension detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6370132A true JPS6370132A (en) | 1988-03-30 |
Family
ID=16672652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61215455A Pending JPS6370132A (en) | 1986-09-11 | 1986-09-11 | Method for measuring cable laying tension and cable laying tension detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6370132A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006310670A (en) * | 2005-05-02 | 2006-11-09 | Mitsubishi Electric Corp | Winder of voltage transformer coil |
| CN102419233A (en) * | 2011-12-14 | 2012-04-18 | 中国矿业大学 | Device and method for detecting tension of elliptic sleeve type steel wire rope |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS612714B2 (en) * | 1975-05-05 | 1986-01-27 | Lummus Co |
-
1986
- 1986-09-11 JP JP61215455A patent/JPS6370132A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS612714B2 (en) * | 1975-05-05 | 1986-01-27 | Lummus Co |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006310670A (en) * | 2005-05-02 | 2006-11-09 | Mitsubishi Electric Corp | Winder of voltage transformer coil |
| CN102419233A (en) * | 2011-12-14 | 2012-04-18 | 中国矿业大学 | Device and method for detecting tension of elliptic sleeve type steel wire rope |
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