WO2016143088A1 - ロープ損傷診断検査装置およびロープ損傷診断検査方法 - Google Patents

ロープ損傷診断検査装置およびロープ損傷診断検査方法 Download PDF

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Publication number
WO2016143088A1
WO2016143088A1 PCT/JP2015/057145 JP2015057145W WO2016143088A1 WO 2016143088 A1 WO2016143088 A1 WO 2016143088A1 JP 2015057145 W JP2015057145 W JP 2015057145W WO 2016143088 A1 WO2016143088 A1 WO 2016143088A1
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WO
WIPO (PCT)
Prior art keywords
rope
magnetic field
magnetic
voltage
yoke
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PCT/JP2015/057145
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English (en)
French (fr)
Japanese (ja)
Inventor
甚 井上
白附　晶英
関　真規人
孝 吉岡
豊弘 野口
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to KR1020177027266A priority Critical patent/KR102020974B1/ko
Priority to CN201580077392.4A priority patent/CN107430090B/zh
Priority to DE112015006279.3T priority patent/DE112015006279B4/de
Priority to PCT/JP2015/057145 priority patent/WO2016143088A1/ja
Priority to JP2017504499A priority patent/JP6289732B2/ja
Publication of WO2016143088A1 publication Critical patent/WO2016143088A1/ja

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    • 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
    • G01N27/9013—Arrangements for scanning
    • 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
    • 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
    • G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields

Definitions

  • the present invention relates to an elevator rope damage diagnosis inspection apparatus and an elevator rope damage diagnosis inspection method for inspecting a breakage or a diameter reduction of a rope for hanging an elevator cage.
  • the E-shaped iron core (3) in Patent Document 1 has three leg portions (31, 32, 33), and U-shaped grooves (31U, 32U, 33U) are formed on the bottom surfaces thereof. Has been. Further, excitation coils (41, 42) are wound around the iron core (3), and a detection coil (43) is wound around the leg portion (33).
  • the wire rope (2) to be inspected is fitted in the grooves (31U, 32U, 33U), and the iron core (3) is connected to the exciting coils (41, 42). ) Along the wire rope (2). And when a leg part (33) passes the damaged part (21) of a wire rope (2), a damaged part (21) can be detected because a voltage generate
  • Patent Document 1 the output generated from the detection coil changes depending on the magnetic characteristics of the rope in addition to the shape of the damage. Therefore, although damage can be detected, other than damage may be detected due to variations in the magnetic characteristics of the rope.
  • such a conventional technique may detect a variation in the magnetic characteristics of the rope, not an abnormality in the shape of the rope (wire breakage, diameter reduction). As a result, there has been a problem that the detection accuracy is lowered or it is difficult to quantify the degree of damage.
  • the present invention has been made in order to solve the above-described problems, and quantitatively detects a rope shape abnormality more accurately than the prior art without depending on variations in magnetic characteristics.
  • An object of the present invention is to obtain a rope damage diagnosis and inspection apparatus and a rope damage diagnosis and inspection method.
  • a rope damage diagnosis and inspection apparatus is a rope damage diagnosis and inspection apparatus that inspects an abnormality in the shape of a rope that suspends an elevator car.
  • the rope damage diagnosis and inspection apparatus is attached to a rope and uses a magnetic field for bringing the rope into a magnetic saturation state.
  • the first yoke to be applied, the first alternating current source that outputs a constant alternating current, and the axial coil are configured to supply a constant current from the first alternating current source to the axial coil.
  • an AC magnetic field applicator that generates an eddy current and an eddy current magnetic field in the rope, and a leak that measures the leakage magnetic flux of the rope during the application of the AC magnetic field
  • the AC magnetic field applicator for the magnetic flux measuring instrument controls the AC magnetic field applicator for the magnetic flux measuring instrument, the first voltage measuring instrument that measures the voltage of the axial coil during application of the AC magnetic field, and the rope that is magnetically saturated by the first yoke.
  • a value proportional to the voltage from the voltage measured by the first voltage measuring device is detected by detecting whether or not the rope is broken from the magnitude of the leakage magnetic flux measured by the leakage magnetic flux measuring device.
  • a controller for calculating the cross-sectional area of the rope and inspecting the rope for abnormal shape from the presence / absence of breakage and the cross-sectional area.
  • the rope damage diagnosis and inspection method is a rope damage diagnosis and inspection method for inspecting an abnormality in the shape of a rope that suspends an elevator car, and applies a magnetic field to the rope to make the rope magnetically saturated.
  • a second step of applying an alternating magnetic field to the rope that has become magnetically saturated a third step of measuring the leakage flux of the rope during application of the alternating magnetic field, and the measured leakage flux
  • an alternating magnetic field is applied to a rope that is in a magnetic saturation state, and during the application of the alternating magnetic field, the presence or absence of a rope breakage is detected from the measurement result of the magnitude of the leakage magnetic flux of the rope.
  • the cross-sectional area of the rope is calculated from the measurement result of the voltage that fluctuates due to the eddy current magnetic field generated in the axial direction, and the configuration of the rope is inspected for the presence of breakage and the cross-sectional area.
  • Embodiment 1 of this invention It is a block diagram of the rope damage diagnostic inspection apparatus in Embodiment 1 of this invention. It is a figure for demonstrating the principle of the disconnection detection in Embodiment 1 of this invention. It is the figure which showed the 1st magnetic characteristic of the rope in Embodiment 1 of this invention. It is the figure which showed the 2nd magnetic characteristic of the rope in Embodiment 1 of this invention. In Embodiment 1 of this invention, it is a figure for demonstrating the relationship between the penetration
  • Embodiment 1 of this invention it is a figure for demonstrating the relationship between the penetration
  • FIG. 1 is a configuration diagram of a rope damage diagnosis and inspection apparatus according to Embodiment 1 of the present invention.
  • the rope damage diagnosis / inspection apparatus according to the first embodiment includes a first yoke 10, a second yoke 20, an axial coil 30, a magnetic sensor array 40, an alternating current source 50, and a voltage measuring device 60. .
  • the first yoke 10 is a yoke for applying a first magnetic field to the rope 1 by being attached to the rope 1 to be inspected, and includes a magnet 11.
  • a direct current magnetic field is applied to the rope 1 via the first yoke 10 as a first magnetic field, whereby the rope 1 can be magnetically saturated.
  • a pulse magnetic field is applied as a first magnetic field to the rope 1 via the first yoke 10, and this also magnetically saturates the rope 1. Can do.
  • a DC magnetic field is applied as an example.
  • the second yoke 20 is a yoke for applying an alternating magnetic field to the rope 1. Specifically, by supplying a constant alternating current from the alternating current source 50 to the axial coil 30 wound around the second yoke 20, the alternating magnetic field is applied to the rope 1 via the second yoke 20. Can be applied. As a result, an eddy current is generated in the rope 1 and an eddy current magnetic field due to the eddy current is also generated.
  • the magnetic sensor array 40 is a leakage flux measuring instrument that measures the leakage flux of the eddy current magnetic field from the breaking portion of the rope 1 and detects the breaking when an alternating magnetic field is applied via the second yoke 20.
  • the direction of the magnetic field detected using the magnetic sensor array 40 may be not only the radial direction but also the axial direction and the circumferential direction. Details of the principle of break detection will be described later.
  • a Hall element As such a leakage magnetic flux measuring instrument, a Hall element, a magnetoresistive element (AMR, GMR, TMR), or a coil can be used instead of the magnetic sensor array 40. Furthermore, when a coil is used as the leakage flux measuring instrument, a single coil may be used.
  • the voltage measuring device 60 measures the voltage V of the axial coil 30 that fluctuates due to the eddy current magnetic field when an AC magnetic field is applied via the second yoke 20, and measures the cross-sectional area S of the rope 1 proportional to the voltage V. Details of the principle of cross-sectional area measurement will be described later.
  • the rope damage diagnostic inspection apparatus has a controller 70. Then, the controller 70 controls the output from the AC current source 50, and executes the break detection process and the cross-sectional area measurement process based on the measurement results by the magnetic sensor array 40 and the voltage measuring device 60.
  • FIG. 2 is a diagram for explaining the principle of disconnection detection in the first embodiment of the present invention. Specifically, an explanatory diagram showing a state in which the magnetic sensor array 40 detects a change in an eddy current magnetic field. It is.
  • the controller 70 measures the change of the eddy current magnetic field by the magnetic sensor array 40, and when the magnitude of the change deviates from the allowable value, the rope 70 It can be detected that 1 breakage has occurred.
  • the AC magnetic flux in the rope 1 by the axial coil 30 is proportional to the rope cross-sectional area and the rope permeability ⁇ .
  • the rope 1 is mainly made of iron, and its magnetic properties change depending on the temperature, material, rolling, etc. during manufacture. Also, the magnetic characteristics change depending on the tension applied to the rope.
  • FIG. 3 is a diagram showing a first magnetic characteristic of the rope 1 according to the first embodiment of the present invention.
  • the first magnetic characteristic shown in FIG. 3 is a magnetic characteristic by a BH curve in which the horizontal axis represents the applied magnetic field H and the vertical axis represents the magnetic field in the rope 1.
  • FIG. 4 is a diagram showing a second magnetic characteristic of the rope 1 according to the first embodiment of the present invention.
  • the second magnetic characteristic shown in FIG. 4 is a magnetic characteristic based on a ⁇ -H curve with the applied magnetic field H on the horizontal axis and the permeability ⁇ on the vertical axis.
  • the magnetic permeability ⁇ corresponds to the slope of the BH curve shown in FIG.
  • the magnetic permeability ⁇ in the applied magnetic field H1 shown in FIG. 4 is affected by the magnetic characteristics of each rope 1 and varies greatly.
  • the internal magnetic flux of the rope 1 is saturated by applying a DC magnetic field, and the applied magnetic field H2 shown in FIG. 4 is obtained.
  • the controller 70 can measure the cross-sectional area in a state where the variation of the magnetic permeability ⁇ is small and the influence of the magnetic characteristics that are different for each rope 1 is suppressed.
  • a DC magnetic field is applied to the rope 1 via the first yoke 10 to saturate the internal magnetic flux B of the rope 1.
  • the controller 70 can obtain the cross-sectional area S from the following calculation formula (1) regarding the axial coil 30.
  • n is the number of coil turns per unit length
  • H rf is an AC magnetic field.
  • the controller 70 controls the axial coil 30 wound around the second yoke 20 so that a constant alternating current is supplied from the alternating current source 50.
  • n ⁇ ⁇ H rf in the above equation (1) Can be a known constant value. Therefore, the controller 70 can measure a value proportional to the cross-sectional area S by measuring the voltage V of the axial coil 30 with the voltage measuring device 60.
  • the eddy current magnetic field is generated by the electromagnetic induction action of the exciting magnetic field by the axial coil 30, it is generated in the direction to cancel the exciting magnetic field. Therefore, the exciting magnetic field that reaches the inside of the rope 1 becomes smaller as the inside of the rope is reduced by the eddy current magnetic field. As a result, the eddy current becomes smaller toward the inside of the rope 1.
  • the depth (skin depth) ⁇ at which the magnitude of the eddy current decreases to 1 / e from the value on the rope surface is expressed by the following equation (2).
  • ⁇ 1 / ⁇ ( ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ f) (2)
  • each coefficient in the above equation (2) is as follows.
  • ⁇ Magnetic permeability
  • ⁇ Electrical conductivity
  • f Frequency of excitation magnetic field
  • FIG. 5 is a diagram for explaining the relationship between the penetration of eddy currents into the rope 1 and the strength of the magnetic field when the rope 1 is in a state of no magnetic field in the first embodiment of the present invention.
  • FIG. 6 is a diagram for explaining the relationship between the penetration of eddy currents into the rope 1 and the strength of the magnetic field when the rope 1 is in a strong magnetic field in the first embodiment of the present invention. .
  • a DC magnetic field is applied to the rope to saturate the internal magnetic flux of the rope. Then, by applying an alternating magnetic field to the saturated rope, rope breakage detection and cross-sectional area measurement are performed. As a result, it is possible to realize an improvement in the accuracy of breakage detection and cross-sectional area measurement while suppressing the influence due to the difference in magnetic characteristics for ropes having different magnetic characteristics.
  • Embodiment 2 a rope damage diagnostic inspection apparatus that realizes the above-described features 1 and 2 with a configuration different from that of the first embodiment will be described.
  • FIG. 7 is a configuration diagram of a rope damage diagnostic inspection apparatus according to Embodiment 2 of the present invention.
  • the rope damage diagnosis and inspection apparatus according to the second embodiment includes a first yoke 10, a second yoke 20, an axial coil 30, a circumferential coil 41, alternating current sources 50 and 51, and voltage measuring devices 60 and 61. It is configured.
  • the controller 70 is not shown.
  • the rope damage diagnosis and inspection apparatus includes a circumferential coil 41 instead of the magnetic sensor array 40, and an alternating current source 51 and a voltage measuring device. 61 is newly provided.
  • the cross-sectional area measurement is the same as in the previous embodiment, but the break detection is performed using the circumferential coil 41 arranged in the vicinity of the rope 1.
  • the controller 70 applies the alternating magnetic field generated by the alternating current source 50, the axial coil 30, and the second yoke 20 to the rope 1, and measures the leakage magnetic flux by the magnetic sensor array 40. By doing so, the breakage was detected.
  • the controller 70 applies an alternating magnetic field generated by the alternating current source 51 and the circumferential coil 41 to the rope 1 and measures the leakage magnetic flux by the circumferential coil 41. By doing so, rupture detection is performed.
  • FIG. 8 is a diagram for explaining the principle of disconnection detection in the second embodiment of the present invention. Specifically, the circumferential coil 41 generates an alternating magnetic field 2 and changes the eddy current magnetic field. It is explanatory drawing which showed the state detected.
  • the controller 70 generates the AC magnetic field 2 by the AC current source 51 and the circumferential coil 41 and applies it to the rope 1 when performing break detection, and when measuring the cross-sectional area.
  • an AC magnetic field 1 is generated by the AC current source 50, the axial coil 30, and the second yoke 20 and applied to the rope 1.
  • the axial coil 30 when the AC magnetic field 2 is being applied by the circumferential coil 41 in order to perform the fracture detection operation, the axial coil 30 is not operated and a current is passed through the axial coil 30. It is controlled by the controller 70 so as not to exist. On the contrary, when the AC magnetic field 1 is being applied by the axial coil 30 in order to measure the cross-sectional area, the controller 70 does not operate the circumferential coil so that no current flows through the circumferential coil 41. Be controlled.
  • the controller 70 When performing the disconnection detection in the second embodiment, the controller 70 causes an eddy current to flow in the axial direction by applying an alternating magnetic field 2 in the circumferential direction as shown in FIG. And the controller 70 detects the change of the eddy current magnetic field in a fracture
  • FIG. 9 is a flowchart showing a series of processing for fracture detection and cross-sectional area measurement according to Embodiment 2 of the present invention.
  • the series of processes in FIG. 9 is executed by the controller 70 included in the rope damage diagnostic inspection apparatus.
  • the operation of FIG. 9 is based on the premise that the internal magnetic flux of the rope 1 is saturated by application of a DC magnetic field or a pulse magnetic field.
  • step S ⁇ b> 901 the controller 70 applies an alternating current magnetic field 2 to the rope 1 by supplying a constant alternating current to the circumferential coil 41 from the alternating current source 51.
  • step S ⁇ b> 902 the controller 70 detects the voltage V ⁇ b> 2 of the circumferential coil 41 via the voltage measuring device 61, thereby executing break detection. Specifically, the controller 70 determines that a break has occurred when the voltage V2 exceeds a voltage level corresponding to the allowable change amount of the eddy current magnetic field.
  • step S903 the controller 70 stops supplying an AC constant current from the AC current source 51 to the circumferential coil 41, ends the break detection process, and performs a cross-sectional area measurement process after step S911. Migrate to
  • step S911 the controller 70 supplies the AC magnetic field 1 to the rope 1 by supplying an AC constant current from the AC current source 50 to the axial coil 30.
  • step S912 the controller 70 detects the voltage V1 of the axial coil 30 through the voltage measuring device 60, thereby executing cross-sectional area measurement. Specifically, the controller 70 measures the cross-sectional area based on the mathematical formula (1) described above.
  • step S913 the controller 70 stops supplying the constant AC current from the AC current source 50 to the axial coil 30, ends the cross-sectional area measurement process, and performs the break process after step S901. Return.
  • a DC magnetic field is applied to the rope so that the internal magnetic flux of the rope is saturated. Then, by applying an alternating magnetic field to the saturated rope, rope breakage detection and cross-sectional area measurement are performed.
  • a circumferential coil is used when detecting breakage. As a result, it becomes possible to further improve the detection accuracy of breakage as compared with the first embodiment.
  • Embodiment 3 FIG. In the third embodiment, a rope damage diagnostic inspection apparatus that realizes the above-described feature 1 and feature 2 with a configuration different from that of the first and second embodiments will be described.
  • FIG. 10 is a configuration diagram of a rope damage diagnostic inspection apparatus according to Embodiment 3 of the present invention.
  • the rope damage diagnosis and inspection apparatus according to the third embodiment includes a first yoke 10, an axial coil 31, a magnetic sensor array 40, an AC current source 50, and a voltage measuring device 60.
  • the rope damage diagnosis and inspection apparatus is arranged around the rope 1 instead of the axial coil 30 wound around the second yoke 20.
  • An axial coil 31 is provided.
  • break detection and cross-sectional area measurement are the same as those in the first embodiment, and a description thereof will be omitted.
  • the second yoke 20 is not required by adopting a configuration in which the axial coil 31 is disposed around the rope 1. As a result, the absorption of the DC magnetic field by the yoke can be eliminated, and variations in the magnetic permeability ⁇ can be suppressed.
  • FIG. 11 is a perspective view of the axial coil 31 according to the third embodiment of the present invention. As shown on the right side of FIG. 10 together with FIG. 11, the axial coil 31 can be easily attached to and detached from the rope 1 by adopting a two-part configuration.
  • the configuration is such that the axial coil is arranged around the rope and the second yoke for applying the alternating magnetic field is not required.
  • the absorption of the DC magnetic field by the yoke can be eliminated, the influence of the variation of the magnetic permeability ⁇ can be suppressed, and further improvement in the accuracy of fracture detection and cross-sectional area measurement can be realized.

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PCT/JP2015/057145 2015-03-11 2015-03-11 ロープ損傷診断検査装置およびロープ損傷診断検査方法 WO2016143088A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020177027266A KR102020974B1 (ko) 2015-03-11 2015-03-11 로프 손상 진단 검사 장치 및 로프 손상 진단 검사 방법
CN201580077392.4A CN107430090B (zh) 2015-03-11 2015-03-11 绳索损伤诊断检查装置和绳索损伤诊断检查方法
DE112015006279.3T DE112015006279B4 (de) 2015-03-11 2015-03-11 Seilbeschädigungsdiagnose-Untersuchungsvorrichtung und Seilbeschädigungsdiagnose-Untersuchungsverfahren
PCT/JP2015/057145 WO2016143088A1 (ja) 2015-03-11 2015-03-11 ロープ損傷診断検査装置およびロープ損傷診断検査方法
JP2017504499A JP6289732B2 (ja) 2015-03-11 2015-03-11 ロープ損傷診断検査装置およびロープ損傷診断検査方法

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PCT/JP2015/057145 WO2016143088A1 (ja) 2015-03-11 2015-03-11 ロープ損傷診断検査装置およびロープ損傷診断検査方法

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JP (1) JP6289732B2 (ko)
KR (1) KR102020974B1 (ko)
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WO (1) WO2016143088A1 (ko)

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EP3438657A1 (en) * 2017-08-02 2019-02-06 Eddyfi NDT Inc. Device for pulsed eddy current testing of ferromagnetic structures covered with ferromagnetic protective jacket
CN110234988A (zh) * 2017-01-26 2019-09-13 株式会社岛津制作所 磁性体的检查装置和磁性体的检查方法
CN112119301A (zh) * 2018-05-15 2020-12-22 株式会社岛津制作所 磁性体检查装置以及磁性体检查方法
WO2021176835A1 (ja) * 2020-03-05 2021-09-10 株式会社小松製作所 動力伝達装置
US11884516B2 (en) 2018-06-25 2024-01-30 Otis Elevator Company Health monitoring of elevator system tension members
WO2024154325A1 (ja) * 2023-01-20 2024-07-25 三菱電機株式会社 欠陥検出装置

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JP6863518B2 (ja) * 2018-03-08 2021-04-21 株式会社島津製作所 磁性体検査装置
FR3098915B1 (fr) * 2019-07-19 2022-07-29 Framatome Sa Dispositif de contrôle par fuite de flux magnétique et procédé associé
KR102265940B1 (ko) * 2019-12-04 2021-06-17 한국표준과학연구원 케이블 결함 검사 장치
CN112326781A (zh) * 2021-01-04 2021-02-05 四川大学 一种轴承滚针漏磁检测装置
CN113484408A (zh) * 2021-07-06 2021-10-08 兰州空间技术物理研究所 一种钢丝绳无损检测装置

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KR20170120167A (ko) 2017-10-30
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