JPS59650A - Electromagnetic flaw detector for wire rope - Google Patents
Electromagnetic flaw detector for wire ropeInfo
- Publication number
- JPS59650A JPS59650A JP11003282A JP11003282A JPS59650A JP S59650 A JPS59650 A JP S59650A JP 11003282 A JP11003282 A JP 11003282A JP 11003282 A JP11003282 A JP 11003282A JP S59650 A JPS59650 A JP S59650A
- Authority
- JP
- Japan
- Prior art keywords
- detection
- wire rope
- rope
- magnetic
- magnetic pole
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
Description
【発明の詳細な説明】
(発明の対象]
本発明はワイヤーロープの電磁探傷装置に係り、特にエ
レベータ−のワイヤーロープなどの損傷全連続的に検出
するのに好適なワイヤーロープの電磁探傷装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Subject of the Invention) The present invention relates to an electromagnetic flaw detection device for wire ropes, and more particularly to an electromagnetic flaw detection device for wire ropes suitable for continuously detecting damage to elevator wire ropes, etc. It is something.
(従来技術)
一般にケーブルカーやエレベータ−に用いられるワイヤ
ーロープは、ロープを構成する索線が長期使用のうちに
断線したり、局部的に摩耗したりして次第にロープの残
存強度が低下してゆくので、定期的にロープの点検を行
い、事故が発生する前にロープを交換するようにしてい
る。このようなロープの点検は目視によるものがほとん
どであったが、最近磁気を利用して損傷の有無を検査す
る方法も一部で実施されるようになってきた。(Prior art) Generally, wire ropes used in cable cars and elevators tend to lose their residual strength due to the wires that make up the rope breaking or becoming locally worn during long-term use. Because of this, the ropes are inspected regularly and replaced before an accident occurs. Most of these rope inspections have been done visually, but recently some methods have begun to use magnetism to inspect for damage.
しかし、この磁気による損傷検出法は検出感度が低かっ
たり、ま友雑音の混入が大きいなどの問題があり、どう
しても十分なる検出精度を得ることは困難であった。However, this magnetic damage detection method has problems such as low detection sensitivity and large interference noise, making it difficult to obtain sufficient detection accuracy.
(発明の目的)
本発明は上記の点に鑑みなされ友もので、その目的とす
るところは、検出精度の高いワイヤーロープの電磁探傷
装置全提供することにある。(Object of the Invention) The present invention has been developed in view of the above points, and its object is to provide a wire rope electromagnetic flaw detection device with high detection accuracy.
(発明の要点)
本発明は上記目的音達成するために、長手方向に走行゛
するワイヤーロープに対向する第1の磁極と第2の磁極
の中間に偶数個の検出鉄心を位置せしめて前記ワイヤロ
ープに夫々対向させると共に、これら各磁極及び各検出
鉄心全共通の継鉄で磁気的に接続し、かつ前記各検出鉄
心に夫々検出コイル全巻装したもので、しかも各検出コ
イルの接続は逆並列接続として前記ロープの揺動ノイズ
を相殺し、損傷信号のみを検出するようにしたものであ
る。(Summary of the Invention) In order to achieve the above-mentioned objective sound, the present invention provides an even number of detection iron cores that are positioned between first and second magnetic poles facing the wire rope running in the longitudinal direction. These magnetic poles and each detection core are placed facing each other on the rope, and are magnetically connected by a common yoke, and each detection core is fully wound with each detection coil, and each detection coil is connected in antiparallel. As a connection, the vibration noise of the rope is canceled out, and only the damage signal is detected.
(実施例)
以下本発明の一実施例全編1図乃至第3図について説明
する。ここに示す実施例はエレベータ−のワイヤーロー
プの損傷を検出するためのもので、エレベータ−0乗か
と1はワイヤーロープ2によって吊られ、このワイヤー
ロープ2の他端は駆動鋼車4A及び従動鋼車4Bに巻掛
けられて釣合おもり3が接続されている。このようなワ
イヤーロープ2の損傷を検出するために、電磁探傷装置
5が該ワイヤーロープ2に対向して設置される。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. The embodiment shown here is for detecting damage to the wire rope of an elevator.Elevators 0 and 1 are suspended by a wire rope 2, and the other end of the wire rope 2 is connected to a driving steel wheel 4A and a driven steel wheel. A counterweight 3 is connected by being wrapped around the car 4B. In order to detect such damage to the wire rope 2, an electromagnetic flaw detector 5 is installed opposite the wire rope 2.
この電磁探傷装置5は、ワイヤーロープ2に対向して磁
極6A、6Bt−配置し、この二つの磁極6A、6Bの
中間位置において二つの検出鉄心7A、7Bk前記ワイ
ヤーローブ2に対向して配置している。前記磁極6A、
61Jはその極性を異にしており、両磁極は大々共通の
継鉄9を有する磁極鉄心8A、8Bと前記継鉄9に巻装
した励磁コイルIOA、IOBとにより構成されている
。This electromagnetic flaw detection device 5 has magnetic poles 6A and 6Bt placed opposite the wire rope 2, and two detection cores 7A and 7Bk placed opposite the wire rope 2 at an intermediate position between the two magnetic poles 6A and 6B. ing. the magnetic pole 6A;
61J have different polarities, and both magnetic poles are constituted by magnetic pole cores 8A and 8B having a yoke 9 that is more or less common, and excitation coils IOA and IOB wound around the yoke 9.
一方、中間位置に設は九二つの検出鉄心7A。On the other hand, 92 detection cores 7A are installed in the middle position.
713は反ワイヤーロープ側で一体となって前記継鉄9
に接続されている。各鉄心7A、7Bはま友検出コイル
11A、IIIJが巻装され、各コイルは逆並列接続さ
れたうえで図示しない信号増巾器を介して記録針や警報
器などの表示装置に接続されている。また、前記各励磁
コイルIOA、IOBは図示しない電源スィッチを介し
て電源に接続されている。713 is integrally connected to the yoke 9 on the side opposite to the wire rope.
It is connected to the. Each iron core 7A, 7B is wound with a friend detection coil 11A, IIIJ, and each coil is connected in antiparallel and connected to a display device such as a recording needle or an alarm via a signal amplifier (not shown). There is. Further, each of the excitation coils IOA and IOB is connected to a power source via a power switch (not shown).
尚、各磁極6A、6B及び各検出鉄心7A。In addition, each magnetic pole 6A, 6B and each detection core 7A.
7Bのワイヤーロープ2との対向面は、前記ワイヤーロ
ープ2との対向面積を大きくして磁気抵抗を少なくする
ために、0字状溝12’(i−形成している。The surface of 7B facing the wire rope 2 is formed with a 0-shaped groove 12' (i-shaped) in order to increase the area facing the wire rope 2 and reduce magnetic resistance.
このように構成された電磁探傷装置5の各励磁コイル1
0A、10Bt励磁し、ワイヤーロープ2をその長手方
向に移動させる。もし、ワイヤーロープ2に損傷があれ
ば検出コイルIIA、IIBがその信号を検出し、゛損
傷の有無を確認することができる。説明の都合上、磁極
6At−N磁極、磁極6BQ8磁極となるように励磁コ
イル10A。Each excitation coil 1 of the electromagnetic flaw detection device 5 configured in this way
The wire rope 2 is moved in its longitudinal direction by being excited at 0 A and 10 Bt. If the wire rope 2 is damaged, the detection coils IIA and IIB detect the signal, and it is possible to confirm the presence or absence of damage. For convenience of explanation, the excitation coil 10A is arranged so that the magnetic poles are 6At-N magnetic poles and 6BQ8 magnetic poles.
10B’=!r励磁すると、磁末はN磁極6Aからロー
プ2内を通り、反対側のS磁極6Bに至ると共に、S磁
極6Bから継鉄9を通ってN磁極6Aに至る。10B'=! When r-excited, the magnetic end passes through the rope 2 from the N magnetic pole 6A to reach the S magnetic pole 6B on the opposite side, and also from the S magnetic pole 6B to the yoke 9 to reach the N magnetic pole 6A.
このような磁末の流れの中における損傷の検出を第4図
について説明する。まず、第2図において、無傷のロー
プ2がF矢印方向(紙面左から右)へ移動している場合
には、上述の通りの回路を磁末φ0が流れているだけで
あり、検出コイル11A。Detection of damage in such a flow of magnetic powder will be explained with reference to FIG. First, in FIG. 2, when the intact rope 2 is moving in the direction of the arrow F (from left to right on the paper), the magnetic tail φ0 is only flowing through the circuit as described above, and the detection coil 11A .
11Bには同等電圧ヲ訪起しない。次に第4図のように
、ロープ2の損傷部2Pが0位置からP位置に移動した
時、ロープ29両磁極、継鉄全通る前記磁末φGのほか
に、損傷部2PにはN磁極による漏洩磁末φ、Nと、S
磁極による―洩磁末φ、llが発生する。この漏洩磁末
はP位置に近い検出鉄心7Aを通ってN磁極、S磁極に
戻るが、その時検出コイルIIAに信号電圧が誘起され
る。No equivalent voltage is applied to 11B. Next, as shown in Fig. 4, when the damaged part 2P of the rope 2 moves from the 0 position to the P position, in addition to both magnetic poles of the rope 29 and the magnetic end φG passing through the yoke, the damaged part 2P has an N magnetic pole. The magnetic leakage end φ, N, and S
Due to the magnetic poles - magnetic leakage φ, ll occurs. This leakage magnetic tail passes through the detection core 7A near the P position and returns to the N and S magnetic poles, but at this time a signal voltage is induced in the detection coil IIA.
ローブ2の移動により損傷部2PがP位置からQ位置に
移ると、こんどは前記漏洩磁末は検出鉄心7Bt−通る
ので検出コイルIIBに信号電圧が誘起される。ところ
で、第4図(a)は損傷部2Pの移動に対しての磁末の
変化を示し、第4図(b) 、 (C)は夫々検出コイ
ルIIA、IIBが検出した信号電圧を示す。そして実
際には前記検出コイル11A。When the damaged part 2P moves from the P position to the Q position due to the movement of the lobe 2, the leakage magnetic end passes through the detection core 7Bt-, so that a signal voltage is induced in the detection coil IIB. By the way, FIG. 4(a) shows the change in the magnetic tail with respect to the movement of the damaged part 2P, and FIGS. 4(b) and 4(C) show the signal voltages detected by the detection coils IIA and IIB, respectively. And actually the detection coil 11A.
11Bが逆並列接続されているので、その合成電圧は第
4図(d)に示すようになり、ノイズの少ない波形が得
られる。即ち、第3図に示すようなU字状溝12をロー
ブ2が通過する際、ローブ2の表面の撚p山による凹凸
によって第4図(e)の拡大図のような揺動ノイズA、
A’が雨検出コイルで検出されるが、例えば検出コイル
11A’に正方向の波形とすると、検出コイルIIBは
逆並列接続の九め負の方向の波形となり、その合成電圧
の波形は上記第4図(d)のように揺動ノイズA、A’
が相互打消合うため低ノイズの信号波形が得られ、損傷
信号電圧P、P’だけが検出鉄心7A、7Bに相当する
位置に互いに逆転された波形として現われる。11B are connected in antiparallel, the combined voltage becomes as shown in FIG. 4(d), and a waveform with less noise is obtained. That is, when the lobe 2 passes through the U-shaped groove 12 as shown in FIG. 3, the unevenness of the surface of the lobe 2 due to the twisted peaks causes vibration noise A as shown in the enlarged view of FIG. 4(e).
A' is detected by the rain detection coil. For example, if the detection coil 11A' has a positive waveform, the detection coil IIB will have a negative waveform in the ninth direction of anti-parallel connection, and the waveform of the combined voltage will be the waveform of the above-mentioned No. As shown in Figure 4 (d), the vibration noise A, A'
Since they cancel each other out, a low-noise signal waveform is obtained, and only the damage signal voltages P and P' appear as mutually reversed waveforms at positions corresponding to the detection cores 7A and 7B.
第5図はロープ2に一つの損傷部2P1と複数の損傷部
2 P 2がある場合、上記実施例の電磁探傷装置5に
より実際に測定し之結果を記録紙13に記録したもので
、これによると夫々損傷の数と同じ数の損傷記録波形P
1 + P 2が記録されるので、3jX傷位置と数
を藺単に知ることができる。FIG. 5 shows a case where the rope 2 has one damaged part 2P1 and a plurality of damaged parts 2P2, and the results are actually measured using the electromagnetic flaw detection device 5 of the above embodiment and the results are recorded on the recording paper 13. According to the number of damage records P
Since 1 + P 2 is recorded, the position and number of 3jX scratches can be easily known.
ところで前記実施例は測定するロープ径が共通なエレベ
ータ−以外の測定は不可能であるが、このような場合に
は各鉄心のU字状1412部分のみロープ径に合ったも
のに交換できるように構成しておけば、一台の電磁探傷
装置によシ各種径のロープの損傷測定を行うことができ
る。また、複数本のロープ全同時に測定する場合にも、
ロープ数に応じたU字状溝金偏えた鉄心先端部金各鉄心
に着脱できるように構成しておけばよい。即ち、各鉄心
端に測定ロープの条件(径9本数、ローブ間隔等]に合
つ九対向部を着脱自在に取付けるようにするのである。By the way, in the above-mentioned embodiment, it is impossible to measure anything other than elevators that have a common rope diameter; however, in such a case, only the U-shaped 1412 portion of each core can be replaced with one that matches the rope diameter. With this configuration, it is possible to measure damage to ropes of various diameters using a single electromagnetic flaw detection device. Also, when measuring multiple ropes at the same time,
It is sufficient to configure the U-shaped grooves according to the number of ropes so that they can be attached to and detached from each core. That is, nine opposing parts that meet the conditions of the measuring rope (number of nine diameters, lobe spacing, etc.) are detachably attached to each core end.
尚、帥記各鉄心7A、7B、8A、8Bと継鉄9とは別
体に形成して最終的に一体化するようにしてもよく、ま
九最初からE字状鉄心で形成してもよい。一方、両磁極
6A、6Bは鉄心と励磁コイルとよりなるが、これt永
久磁石に置換して用いることも可能である。このほか、
前記実施例はエレベータ−のロープの損傷検出について
説明シ友が、ワイヤーロープであればすべて測定できる
のでエレベータ−のロープに限定されるものではない。It should be noted that the respective iron cores 7A, 7B, 8A, 8B and the yoke 9 may be formed separately and finally integrated, or they may be formed as E-shaped iron cores from the beginning. good. On the other hand, both magnetic poles 6A and 6B are composed of an iron core and an excitation coil, but they can also be replaced with permanent magnets. other than this,
The above embodiment describes the detection of damage to elevator ropes, but the present invention is not limited to elevator ropes, as any wire rope can be measured.
(発明の効果)
以上説明したように本発明によれは、ロープに対向して
N磁極とS磁極全配置し、かつ両磁極の中間位置で前記
ロープに対向する検出鉄心を配置し、これら両磁極と検
出鉄心の背側を磁気的に接続すると共に、前記検出鉄心
をロープ長手方向に間隔をもって偶数個設けて夫々に検
出コイルを巻装し、かつ各検出コイルを逆並列接続した
ので、同期するノイズを電気的に相殺して損傷信号電圧
のみを検出することができ、その結果検出精度の高いワ
イヤーロープの電磁探傷装置を得ることができる。(Effects of the Invention) As explained above, according to the present invention, N magnetic poles and S magnetic poles are all arranged facing the rope, and a detection iron core is arranged facing the rope at an intermediate position between both magnetic poles. In addition to magnetically connecting the magnetic pole and the back side of the detection core, an even number of detection cores were provided at intervals in the longitudinal direction of the rope, each of which was wrapped with a detection coil, and each detection coil was connected in antiparallel, so that synchronization was achieved. It is possible to electrically cancel out the noise caused by the wire rope and detect only the damage signal voltage, and as a result, it is possible to obtain a wire rope electromagnetic flaw detection device with high detection accuracy.
【図面の簡単な説明】
第1図は本発明による電磁探傷装置の使用状態を示すエ
レベータ−の概略縦断側面図、第2図は本発明による電
磁探傷装置の基本構成を示す概略側面図、第3図は第2
図■−■線に沿う断面図、第4図は本発明による電磁探
傷装置での損傷検出状態を示す説明図、第5図は損傷ロ
ープと記録波形との関係を示す説明図である。
2・・・ワイヤーロープ、6A、6B・・・磁極、7A
。
7B・・・検出鉄心、9・・・継鉄、IIA、IIB・
・・検第10
篤30
毬4riU[Brief Description of the Drawings] Fig. 1 is a schematic vertical sectional side view of an elevator showing the state in which the electromagnetic flaw detection device according to the present invention is used, and Fig. 2 is a schematic side view showing the basic configuration of the electromagnetic flaw detection device according to the present invention. Figure 3 is the second
FIG. 4 is an explanatory diagram showing the state of damage detection by the electromagnetic flaw detection apparatus according to the present invention, and FIG. 5 is an explanatory diagram showing the relationship between the damaged rope and the recorded waveform. 2...Wire rope, 6A, 6B...Magnetic pole, 7A
. 7B...Detection iron core, 9...Yoke, IIA, IIB・
...Ken No. 10 Atsushi 30 Mari 4riU
Claims (1)
の磁極と、この第1の磁極から前記長手方向に離れた位
置で前記ワイヤーロープに対向し前記第1の磁極とは異
極の第2の一極と、前記第1の磁極と第2の磁極との中
間位置にて前記ワイヤーロープに対向し検出コイルを巻
装した検出鉄心と、前記第1の磁極と第2の磁極と検出
鉄心の各背側を磁気的に接続した継鉄とを備えてなるワ
イヤーロープの電磁探傷装置において、前記検出コイル
を巻装した検出鉄心を前記長手方向に間隔をもって偶数
個設け、かつ前記各検出コイルを逆並列接続したこと全
特徴とするワイヤーロープの電磁探傷装置。1. The first wire rope facing the wire rope running in the longitudinal direction
a second pole opposite to the wire rope at a position away from the first magnetic pole in the longitudinal direction and having a different polarity from the first magnetic pole; A detection core that faces the wire rope at an intermediate position between the magnetic pole and is wound with a detection coil, and a yoke that magnetically connects the first magnetic pole, the second magnetic pole, and each back side of the detection core. In the wire rope electromagnetic flaw detection device comprising: an even number of detection cores wound with the detection coils are provided at intervals in the longitudinal direction, and each of the detection coils are connected in antiparallel. Flaw detection equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11003282A JPS59650A (en) | 1982-06-28 | 1982-06-28 | Electromagnetic flaw detector for wire rope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11003282A JPS59650A (en) | 1982-06-28 | 1982-06-28 | Electromagnetic flaw detector for wire rope |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59650A true JPS59650A (en) | 1984-01-05 |
JPH0149898B2 JPH0149898B2 (en) | 1989-10-26 |
Family
ID=14525378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11003282A Granted JPS59650A (en) | 1982-06-28 | 1982-06-28 | Electromagnetic flaw detector for wire rope |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59650A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4515961A (en) * | 1983-08-16 | 1985-05-07 | American Home Products Corporation | Resolution of (±)-1,8-diethyl-1,3,4,9-tetrahydropyrano[3,4,-b] indole-1-acetic acid using enrichment crystallization |
JPH11230945A (en) * | 1998-02-09 | 1999-08-27 | Hitachi Building Systems Co Ltd | Magnetic flaw-detecting device of wire rope |
JP2002181792A (en) * | 2000-12-15 | 2002-06-26 | Hitachi Building Systems Co Ltd | Damage detection apparatus for wire rope |
EP1439262A2 (en) * | 2003-01-15 | 2004-07-21 | Hitachi, Ltd. | Rope and method for detecting damage thereof |
JP2005225741A (en) * | 2004-02-16 | 2005-08-25 | Kashiwara Machine Mfg Co Ltd | Apparatus for manufacturing single crystal |
JP2009091127A (en) * | 2007-10-10 | 2009-04-30 | Mitsubishi Electric Building Techno Service Co Ltd | Rope inspecting method |
WO2011004445A1 (en) * | 2009-07-06 | 2011-01-13 | 三菱電機株式会社 | Elevator device |
JP2011257183A (en) * | 2010-06-07 | 2011-12-22 | Hitachi Building Systems Co Ltd | Flaw detector of wire rope |
JPWO2011148456A1 (en) * | 2010-05-25 | 2013-07-25 | 三菱電機株式会社 | Wire rope flaw detector |
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JP5147512B2 (en) * | 2008-04-17 | 2013-02-20 | 株式会社日立ビルシステム | Wire rope flaw detector |
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Citations (1)
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JPS53142289A (en) * | 1977-05-18 | 1978-12-11 | Nippon Kokan Kk | Method and apparatus for alternating current magnetic crack detection |
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1982
- 1982-06-28 JP JP11003282A patent/JPS59650A/en active Granted
Patent Citations (1)
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JPS53142289A (en) * | 1977-05-18 | 1978-12-11 | Nippon Kokan Kk | Method and apparatus for alternating current magnetic crack detection |
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JP2002181792A (en) * | 2000-12-15 | 2002-06-26 | Hitachi Building Systems Co Ltd | Damage detection apparatus for wire rope |
EP1439262A2 (en) * | 2003-01-15 | 2004-07-21 | Hitachi, Ltd. | Rope and method for detecting damage thereof |
EP1439262A3 (en) * | 2003-01-15 | 2005-07-06 | Hitachi, Ltd. | Rope and method for detecting damage thereof |
JP2005225741A (en) * | 2004-02-16 | 2005-08-25 | Kashiwara Machine Mfg Co Ltd | Apparatus for manufacturing single crystal |
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JPWO2011148456A1 (en) * | 2010-05-25 | 2013-07-25 | 三菱電機株式会社 | Wire rope flaw detector |
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CN104512779A (en) * | 2013-09-30 | 2015-04-15 | 上海三菱电梯有限公司 | Detecting device and method for suspension element of elevator |
JP2017015586A (en) * | 2015-07-02 | 2017-01-19 | 株式会社日立ビルシステム | Rope inspection device and rope inspection system |
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