WO2021152939A1 - Dispositif d'inspection de câbles métalliques, système d'inspection de câbles métalliques et procédé d'inspection de câbles métalliques - Google Patents

Dispositif d'inspection de câbles métalliques, système d'inspection de câbles métalliques et procédé d'inspection de câbles métalliques Download PDF

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Publication number
WO2021152939A1
WO2021152939A1 PCT/JP2020/040302 JP2020040302W WO2021152939A1 WO 2021152939 A1 WO2021152939 A1 WO 2021152939A1 JP 2020040302 W JP2020040302 W JP 2020040302W WO 2021152939 A1 WO2021152939 A1 WO 2021152939A1
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Prior art keywords
wire rope
detection
detection signals
value
measurement
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PCT/JP2020/040302
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English (en)
Japanese (ja)
Inventor
戸波　寛道
亘 潮
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株式会社島津製作所
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Priority to JP2021574465A priority Critical patent/JP7318749B2/ja
Publication of WO2021152939A1 publication Critical patent/WO2021152939A1/fr

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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

Definitions

  • the present invention relates to a wire rope inspection device, a wire rope inspection system, and a wire rope inspection method, and in particular, a wire rope inspection device, a wire rope inspection system, and a wire rope inspection system that detect a state of a wire rope based on a change in a magnetic field of the wire rope.
  • wire rope inspection method relates to a wire rope inspection device, a wire rope inspection system, and a wire rope inspection method.
  • wire rope inspection device Conventionally, a wire rope inspection device, a wire rope inspection system, and a wire rope inspection method for detecting a change in the magnetic field of the wire rope are known.
  • wire rope inspection devices, wire rope inspection systems, and wire rope inspection methods are disclosed, for example, in International Publication No. 2019/150539.
  • the wire rope inspection device of International Publication No. 2019/150539 is configured to inspect the wire rope while moving relative to the wire rope.
  • the wire rope inspection device of International Publication No. 2019/150539 has a difference between the first detection signal acquired by the differential coil in the first measurement of the wire rope and the second measurement after the first measurement. It is configured to detect the state of the wire rope based on the difference at substantially the same position as the second detection signal acquired by the moving coil. As a result, the inherent magnetic characteristics (noise data) of the wire rope are removed (cancelled), and a signal caused by damage to the wire rope or the like is extracted.
  • the wire rope is temporarily included in the measurement data due to the shaking of the wire rope and the rope draw (a phenomenon in which a plurality of wire ropes are twisted). Magnetic characteristics (noise) may be included.
  • the temporary magnetic characteristics are data that can change from measurement to measurement because the state of wire rope sway and rope draw differs from measurement to measurement. Therefore, in the wire rope inspection device described in International Publication No.
  • the present invention has been made to solve the above-mentioned problems, and one object of the present invention is even when there is a signal (noise) caused by damage or shaking of the wire rope. It is an object of the present invention to provide a wire rope inspection device, a wire rope inspection system, and a wire rope inspection method capable of easily detecting damage to a wire rope.
  • the wire rope inspection device includes a detection coil that detects a change in the magnetic field of the wire rope, a control unit that receives a detection signal acquired by the detection coil, and a control unit.
  • the control unit is obtained by the detection coil in the first measurement of the wire rope a plurality of times, and has a first value based on a plurality of first detection signals representing the detection signals for each position of the wire rope, and the first measurement. Based on the difference from the second value based on the plurality of second detection signals acquired by the detection coil in the second measurement of the wire rope performed after, and representing the detection signal for each position of the wire rope. It is configured to detect the state of.
  • the wire rope inspection system includes an inspection device including a detection coil for detecting a change in the magnetic field of the wire rope, and a control device for receiving a detection signal acquired by the detection coil.
  • the device is acquired by the detection coil in the first measurement of the wire rope a plurality of times, and is performed after the first measurement and the first value based on the plurality of first detection signals representing the detection signals for each position of the wire rope.
  • the state of the wire rope is detected based on the difference from the second value based on the plurality of second detection signals acquired by the detection coil in the second measurement of the wire rope multiple times and representing the detection signal for each position of the wire rope. It is configured to do.
  • a detection coil for detecting a change in the magnetic field of the wire rope is used to represent a plurality of detection signals for each position of the wire rope in a plurality of first measurements of the wire rope.
  • the detection coil represents a plurality of detection signals for each position of the wire rope. 2.
  • a step of acquiring a second value based on the detection signal and a step of detecting the state of the wire rope based on the difference between the first value and the second value are provided.
  • the first detection signal is based on the plurality of first detection signals.
  • the state of the wire rope is detected based on the difference between the value of 1 and the second value based on the plurality of second detection signals.
  • the signal (noise) caused by the shaking of the wire rope or the like appears temporarily, the appearance (the position where the signal appears in the output waveform) in the detection signal (output waveform) randomly appears. It can change.
  • a signal caused by damage to a wire rope is not temporary, and its appearance (the position where the signal appears in the output waveform) in the detection signal (output waveform) is fixed.
  • it is based on a signal that appears in common and a signal that appears randomly in a plurality of first (second) detection signals. Therefore, it is possible to discriminate between a signal that appears due to damage to the wire rope or the like and a signal that temporarily appears due to the shaking of the wire rope or the like. As a result, even when there is a signal (noise) caused by damage or shaking of the wire rope, damage to the wire rope can be easily detected.
  • the wire rope inspection device 100 is configured to inspect the wire rope W, which is an inspection target.
  • the wire rope inspection device 100 is configured to periodically inspect the wire rope W.
  • the wire rope inspection device 100 is configured to inspect the wire rope W for damage.
  • the damage to the wire rope W is caused by a gap in the detection direction caused by threads, local wear, wire breakage, dents, corrosion, cracks, breakage, etc. (when scratches or the like occur inside the wire rope W).
  • This is a broad concept that includes changes in cross-sectional area (including those), changes in magnetic permeability caused by rust on the wire rope W, welding burns, mixing of impurities, changes in composition, and other non-uniform parts of the wire rope W.
  • a plurality of wire ropes W are provided.
  • five wire ropes W are shown for simplification, but about 10 wire ropes may be provided.
  • the differential coil 10 described later of the wire rope inspection device 100 is configured to collectively detect the magnetic characteristics of the plurality of wire ropes W. That is, the differential coil 10 acquires one detection signal in which the detection signals of the plurality of wire ropes W are combined.
  • the wire rope inspection device 100 (differential coil 10) is configured to inspect a plurality of wire ropes W in a non-contact state. The inspection by the wire rope inspection device 100 is performed in an inspection mode in which the elevator E is moved at a speed slower than the speed of the elevator E during normal operation.
  • the wire rope inspection device 100 inspects the wire rope W while being relatively moved along the surface of the wire rope W used in the elevator E.
  • the elevator E includes a basket portion E1 and a hoisting machine E2 that winds up the wire rope W to raise and lower the basket portion E1.
  • the wire rope inspection device 100 is configured to inspect the moving (winding) wire rope W in a state of being fixed in the vicinity immediately below the hoisting machine E2.
  • the wire rope W is arranged so as to extend in the X direction at the position of the wire rope inspection device 100.
  • the elevator E goes up and down the hoistway 101.
  • the hoisting machine E2 is provided in the hoistway 101 of the elevator E. That is, the elevator E is a so-called machine roomless type elevator.
  • the elevator E may be an elevator having a machine room (a type in which the hoisting machine E2 is provided in a machine room isolated from the hoistway 101).
  • the wire rope inspection device 100 includes a detection unit 1 and an electronic circuit unit 2.
  • the detection unit 1 includes a differential coil 10 having a pair of receiving coils 11 and 12 and an exciting coil 13.
  • the electronic circuit unit 2 includes a control unit 21, a reception I / F 22, a storage unit 23, an excitation I / F 24, a power supply circuit 25, and a communication unit 26.
  • the wire rope inspection device 100 includes a magnetic field application unit 4 (see FIG. 4).
  • the differential coil 10 is an example of a "detection coil" in the claims.
  • an external device 900 (see FIG. 1) is connected to the wire rope inspection device 100 via the communication unit 26.
  • the external device 900 includes a communication unit 901, an analysis unit 902, and a display unit 903.
  • the external device 900 is configured to receive the measurement data of the wire rope W by the wire rope inspection device 100 via the communication unit 901. Further, the external device 900 is configured so that the analysis unit 902 analyzes the type of damage such as wire breakage and cross-sectional area change based on the received measurement data of the wire rope W. Further, the external device 900 is configured to display the analysis result on the display unit 903. Further, the external device 900 is configured to perform an abnormality determination based on the analysis result and display the result on the display unit 903.
  • the wire rope inspection device 100 is configured to detect a change in the magnetic field (magnetic flux) of the wire rope W by the differential coil 10.
  • the change in the magnetic field means a change in the strength of the magnetic field detected by the detection unit 1 due to the relative movement of the wire rope W and the detection unit 1, and a time change in the magnetic field applied to the wire rope W. It is a broad concept including a temporal change in the strength of the magnetic field detected by the detection unit 1 by changing it.
  • the magnetic field application unit 4 applies a magnetic field in advance to the wire rope W, which is the object to be inspected, in the Y direction (the direction intersecting the extending direction of the wire rope W), and the wire rope is a magnetic material. It is configured to adjust the magnitude and direction of the magnetization of W. Further, the magnetic field application unit 4 includes a first magnetic field application unit including magnets 41 and 42, and a second magnetic field application unit including magnets 43 and 44. The first magnetic field application units (magnets 41 and 42) are arranged on one side (X1 direction side) of the wire rope W in the extending direction with respect to the detection unit 1.
  • the second magnetic field application unit (magnets 43 and 44) is arranged on the other side (X2 direction side) of the wire rope W in the extending direction with respect to the detection unit 1.
  • it may be configured that only one of the first magnetic field application part and the second magnetic field application part is provided.
  • the first magnetic field application portions (magnets 41 and 42) are configured to apply a magnetic field parallel to the plane intersecting the extending direction (X direction) of the wire rope W and in the Y2 direction.
  • the second magnetic field application portions (magnets 43 and 44) are configured to apply a magnetic field parallel to the plane intersecting the extending direction (X direction) of the wire rope W and in the Y1 direction. That is, the magnetic field application unit 4 is configured to apply a magnetic field in a direction substantially orthogonal to the X direction, which is the longitudinal direction of the long lumber.
  • the differential coil 10 includes a receiving coil 11 arranged along the direction in which the wire rope W, which is a magnetic material made of a long material, extends. Further, the differential coil 10 is arranged so as to sandwich the wire rope W together with the receiving coil 11 on the side (Y2 direction side) opposite to the side (Y1 direction side) where the receiving coil 11 is arranged with respect to the wire rope W.
  • the receiving coil 12 is included.
  • the excitation coil 13 includes a printed circuit board 13b on which the first conducting wire portion 13a is formed. Further, the excitation coil 13 includes a printed circuit board 13d on which the second conducting wire portion 13c is formed.
  • the first conductor portion 13a and the second conductor portion 13c are connected by a connecting conductor portion (not shown).
  • the wire rope W passes through the inside (inside) of the differential coil 10 and the excitation coil 13. Further, the differential coil 10 is provided inside the excitation coil 13.
  • the arrangement of the differential coil 10 and the excitation coil 13 is not limited to this.
  • the differential coil 10 and the excitation coil 13 in FIG. 4 are schematically shown, and may differ from the actual arrangement (configuration).
  • the differential coil 10 is configured to be a differential coil in which the receiving coil 11 and the receiving coil 12 are differentially connected.
  • the receiving coil 11 is provided so as to be electrically insulated from the first conducting wire portion 13a (see FIG. 4).
  • the receiving coil 11 may be formed as a conductor pattern on the printed circuit board 13b (see FIG. 4) on which the first conducting wire portion 13a is formed, or may be formed on a printed circuit board different from the printed circuit board 13b or a flexible substrate having a multilayer structure. It may be formed as a conductor pattern.
  • the receiving coil 12 is provided so as to be electrically insulated from the second conducting wire portion 13c.
  • the receiving coil 12 may be formed as a conductor pattern on the printed circuit board 13d on which the second conducting wire portion 13c is formed, or may be formed as a conductor pattern on a printed circuit board different from the printed circuit board 13d or a flexible substrate having a multilayer structure. You may.
  • the excitation coil 13 excites the magnetized state of the wire rope W. Specifically, when the excitation AC current is passed through the excitation coil 13, a magnetic field generated based on the excitation AC current is applied inside the excitation coil 13 along the X direction.
  • the differential coil 10 is configured to transmit the differential signals of the pair of receiving coils 11 and 12. Specifically, the differential coil 10 is configured to detect a change in the magnetic field of the wire rope W and transmit a differential signal. The differential coil 10 is configured to detect a change in the magnetic field of the wire rope W, which is an inspection object, in the X direction and output a detection signal (voltage). That is, the differential coil 10 detects a change in the magnetic field in the X direction intersecting the Y direction with respect to the wire rope W to which the magnetic field is applied in the Y direction by the magnetic field application unit 4. Further, the differential coil 10 is configured to output a differential signal (voltage) based on a change in the detected magnetic field of the wire rope W in the X direction. Further, the differential coil 10 is arranged so that substantially all of the magnetic field generated by the excitation coil 13 can be detected (input).
  • the total magnetic flux of the wire rope W (value obtained by multiplying the magnetic field by the magnetic permeability and the area) becomes smaller at the defective parts (scratches, etc.).
  • the absolute value (differential signal) of the difference in the detection voltage by the differential coil 10 becomes large.
  • the differential signal in the portion without defects (scratches, etc.) is substantially zero. In this way, in the differential coil 10, a clear signal (a signal having a good S / N ratio) indicating the presence of defects (scratches, etc.) is detected.
  • the electronic circuit unit 2 can detect the presence of defects (scratches, etc.) in the wire rope W based on the value of the differential signal.
  • the control unit 21 of the electronic circuit unit 2 shown in FIG. 3 is configured to control each unit of the wire rope inspection device 100.
  • the control unit 21 includes a processor such as a CPU (central processing unit), a memory, an AD converter, and the like.
  • the control unit 21 is configured to receive the differential signal (detection signal) of the differential coil 10 and detect the state of the wire rope W. Further, the control unit 21 is configured to control the excitation coil 13 to be excited. Further, the control unit 21 is configured to transmit the detection result of the state of the wire rope W to the external device 900 via the communication unit 26. The details of the control unit 21 will be described later.
  • the receiving I / F 22 is configured to receive the differential signal from the differential coil 10 and transmit it to the control unit 21.
  • the receiving I / F 22 includes an amplifier.
  • the receiving I / F 22 is configured to amplify the differential signal of the differential coil 10 and transmit it to the control unit 21.
  • the excitation I / F 24 is configured to receive a signal from the control unit 21 and control the supply of electric power to the excitation coil 13. Specifically, the excitation I / F 24 controls the supply of electric power from the power supply circuit 25 to the excitation coil 13 based on the control signal from the control unit 21.
  • the wire rope W is formed by knitting (for example, strand knitting) a magnetic wire material.
  • the wire rope W is a magnetic material made of a long material extending in the X direction.
  • the state (presence or absence of scratches, etc.) of the wire rope W is monitored in order to prevent cutting due to deterioration. Then, the wire rope W whose deterioration has progressed from a predetermined amount is replaced.
  • the wire rope W has unique magnetic characteristics.
  • the inherent magnetic characteristics are magnetic properties that change due to differences in the uniformity of twisting at the cross-sectional position orthogonal to the longitudinal direction (X direction) of the wire rope W and the uniformity of the amount of steel material. It is a characteristic.
  • the uniformity of the twist of the wire rope W and the uniformity of the amount of the steel material do not substantially change with time (or are unlikely to change significantly with time). Therefore, since the wire rope W has unique magnetic characteristics, if there is no damage or shaking of the wire rope W described later, the wire rope is measured by the wire rope inspection device 100 at different time points. The output at each position in the longitudinal direction (X direction) of W becomes substantially the same (measured with good reproducibility).
  • each of the first detection signal and the second detection signal is a signal acquired in the outbound route of the elevator E.
  • Each of the first detection signal and the second detection signal may be a signal acquired on the return path of the elevator E.
  • the storage unit 23 is configured to store the position information of the wire rope W and the detection information associated with each of the first detection signal and the second detection signal.
  • the storage unit 23 can be configured by an HDD, an SSD, or the like.
  • the first detection signal is a detection signal acquired by the wire rope W in a undamaged state. That is, the detection signal (reference signal) representing the initial state of the wire rope W acquired in advance is always used in the inspection as the first detection signal.
  • the second detection signal is the current detection signal of the wire rope W. It is not necessary to use the detection signal acquired in advance (initially) as the first detection signal. For example, the detection signal acquired this time may be used as the first detection signal for the next measurement.
  • the wire rope W has magnetic characteristics caused by damage to the wire rope W, swaying of the wire rope W, rope draw (a phenomenon in which a plurality of wire ropes are twisted), and the like. Temporary magnetic properties due to the rope may appear.
  • FIG. 6 describes an example in which the wire rope W is damaged (broken) in the second measurement.
  • the first detection signal obtained by the first measurement by the wire rope inspection device 100 see FIG. 6A
  • the second detection signal obtained by the second measurement FIG. 6
  • a signal due to damage to the wire rope W appears in the difference from 6 (B)).
  • FIG. 6D is a differential result obtained by differentially calculating the difference result of FIG. 6C.
  • the detection signal caused by the shaking of the wire rope W or the like is a signal that can appear in each of the first measurement and the second measurement. Further, since the place where the wire rope W shakes or the like is not constant, the place where the signal caused by the wire rope W shake or the like appears may differ from measurement to measurement. Therefore, in the difference between the first detection signal in the first measurement and the second detection signal in the second measurement (see FIG. 6C), the detection signal caused by the shaking of the wire rope W or the like may not be canceled. .. In this case, even if the difference result of FIG. 6 (C) and the differential result of FIG. 6 (D) are seen, is it a signal caused by damage to the wire rope W or a signal caused by the shaking of the wire rope W? May be difficult to determine.
  • control unit 21 performs a process of calculating the difference between the first added value described later and the second added value described later, and the first detection signal and the second. It is configured to detect the state of the wire rope W based on the addition process based on the detection signal.
  • control unit 21 is the first addition value between the plurality of first detection signals acquired by the differential coil 10 in the first measurement of the wire rope W a plurality of times (five times in the first embodiment). Based on the difference between the wire rope and the second addition value of the plurality of second detection signals acquired by the differential coil 10 in the second measurement of the wire rope W a plurality of times (five times in the first embodiment). It is configured to detect the state of W.
  • the first added value and the second added value are examples of the "first value" and the "second value" in the claims, respectively.
  • the control unit 21 has a first added value in which a plurality of first detection signals are added (see FIG. 7A) and a second added value in which a plurality of second detection signals are added (see FIG. 7A). It is configured to detect the state of the wire rope W based on the difference from FIG. 7B).
  • 7 (A) and 7 (B) are conceptual diagrams for convenience to explain the principle, but the signal caused by the damage of the wire rope W is a solid line, and the signal caused by the shaking of the wire rope W is a broken line. It is displayed with.
  • the broken line and solid line signals of FIGS. 7 (A) and 7 (B) are conceptually illustrated as those corresponding to the peak signals appearing in the waveform of the differential output of FIG. 6 (D).
  • the signal (broken line signal) caused by the shaking of the wire rope W or the like appears at a different position for each measurement. Therefore, in each of the first added value and the second added value after the addition, the signal caused by the swing of the wire rope W or the like is plotted at scattered positions in the output waveform.
  • the position of the signal (solid line signal) caused by the damage of the wire rope W or the like is constant every time the measurement is performed a plurality of times.
  • the second addition value after addition the signals caused by the damage of the wire rope W or the like are added to each other, and a relatively large signal is obtained. That is, by adding the second detection signals to each other, the signal caused by the damage of the wire rope W or the like becomes relatively large, and the signal caused by the shaking of the wire rope W or the like becomes relatively small (S / N). The ratio improves).
  • the addition of the first detection signals and the second detection signals is performed by performing the alignment control of the wire rope W so that the signals at substantially the same positions of the wire rope W are added. .. Specifically, the inspection by the wire rope inspection device 100 is performed while moving the elevator E from the top floor to the bottom floor at a constant speed. Therefore, the signal at the same time for each measurement becomes a signal at substantially the same position on the wire rope W. That is, the alignment control of the wire rope W is performed by adjusting the time between the detection signals in each measurement. It should be noted that the alignment control may be performed by using the position sensor that detects the position of the elevator E instead of the alignment based on the above time alignment. This position sensor may be provided in the wire rope inspection device 100 itself, or may be provided separately from the wire rope inspection device 100.
  • control unit 21 calculates the difference between the acquired first addition value and the second addition value by performing the above-mentioned alignment control. Then, the control unit 21 performs differential calculation on the difference between the calculated first added value and the second added value, and performs signal processing (see FIG. 6D).
  • control unit 21 has a function of determining whether or not the wire rope W has a defect and the size of the defect (scratch or the like) of the wire rope W based on the differential result calculated by the above differential calculation. Have.
  • the control unit 21 may make the above determination directly from the difference result between the first addition value and the second addition value.
  • control unit 21 is configured to acquire the difference between the first detection signal and the second detection signal after correcting the sensitivity of the differential coil 10 with respect to the second detection signal.
  • the correction coefficient for the above correction may be set according to the ambient temperature at which the differential coil 10 is placed.
  • the correction coefficient may be a ratio obtained by comparing representative peaks in the output waveforms of the first detection signal and the second detection signal.
  • control unit 21 detects the state of the wire rope W based on the plurality of second detection signals acquired in the second measurement of the same number of times as the first measurement. It is configured. Specifically, the control unit 21 is configured to detect the state of the wire rope W based on five detection signals acquired in each measurement.
  • the wire rope W inspection method includes a step (step S1) of acquiring a plurality of first detection signals in the first measurement of the wire rope W a plurality of times.
  • the first measurement is performed five times in a row.
  • the five first detection signals are stored in the storage unit 23 (see FIG. 3).
  • the first measurement may be performed before the wire rope W is used for the elevator E, or may be performed after the wire rope W is used.
  • the method for inspecting the wire rope W is a step (step S2) of acquiring a plurality of second detection signals (see FIG. 7B) in the second measurement of the wire rope W a plurality of times after the first measurement. ) Is provided. Specifically, the second measurement is performed after a predetermined period from the first measurement. The second measurement is performed five times in a row.
  • the length between the first measurement and the second measurement is not a relatively long period (for example, several decades) when the wire rope W is cut, but a degree to which the progress of damage to the wire rope W can be confirmed. It is preferable to set it for a predetermined period (for example, several months).
  • the wire rope W is measured (inspected) under the same conditions as the first measurement. For example, in the second measurement, the wire rope W is moved with respect to the wire rope inspection device 100 at the same speed as in the first measurement. In the second measurement, the measurement (inspection) is started from the same position of the wire rope W as the first measurement, and the measurement (inspection) is finished at the same position of the wire rope W as the first measurement. By the second step, an output waveform as shown in FIG. 7B is obtained.
  • the wire rope W inspection method includes a step (step S3) of acquiring the first added value by adding the five first detection signals to each other (see FIG. 7A).
  • the control unit 21 adds the five first detection signals by performing alignment control that substantially matches the position where the wire rope W is detected.
  • step S3 may be performed before step S2.
  • step S3 may be performed at the same time when the five first detection signals are acquired.
  • the wire rope W inspection method includes a step (step S4) of acquiring the second added value by adding the five second detection signals to each other (see FIG. 7B).
  • the control unit 21 adds the five second detection signals by performing alignment control that substantially matches the position where the wire rope W is detected.
  • the second detection signal includes a signal caused by damage to the wire rope W or the like
  • the signals caused by the damage or the like in each of the second detection signals are added to each other (see FIG. 7B). ..
  • the control unit 21 performs the above-mentioned alignment control on the difference between the first added value calculated in step S3 and the second added value calculated in step S4.
  • the calculation step (step S5) is provided.
  • the signals based on the unique magnetic characteristics of the wire ropes W at the time of the first measurement and the time of the second measurement are canceled (see FIG. 5).
  • the signal caused by the damage of the wire rope W and the signal caused by the shaking of the wire rope W and the like are acquired as the difference result (see FIG. 8).
  • FIG. 8 similarly to FIG. 7, the signal caused by the damage of the wire rope W and the like is shown by a solid line, and the signal caused by the shaking of the wire rope W and the like is shown by a broken line.
  • the wire rope W inspection method includes a step (step S6) of detecting the state of the wire rope W based on the difference calculated in step S5 by the control unit 21. Specifically, the control unit 21 outputs a differential result (see FIG. 6D) by performing signal processing (differential calculation) on the difference calculated in step S5. Then, the control unit 21 determines whether or not the wire rope W has a defect and the size of the defect (scratch or the like) of the wire rope W based on the output differential result.
  • the control unit 21 is acquired by the differential coil 10 in the first measurement of the wire rope W a plurality of times, and represents a plurality of first detection signals for each position of the wire rope W.
  • the first addition value (first value) based on the detection signal and the second measurement of the wire rope W performed a plurality of times after the first measurement are acquired by the differential coil 10 and detected for each position of the wire rope W. It is configured to detect the state of the wire rope W based on the difference from the second addition value (second value) based on the plurality of second detection signals representing the signals.
  • the signal (noise) caused by the shaking of the wire rope W or the like appears temporarily, the appearance (position where the signal appears in the output waveform) in the detection signal (output waveform) is random. Can change to.
  • the signal of the wire rope W caused by the damage of the wire rope W, for example is not temporary, and the appearance (the position where the signal appears in the output waveform) in the detection signal (output waveform) is fixed. ing.
  • this characteristic unlike the case where one first detection signal and one second detection signal are used, it is based on a signal that appears in common and a signal that appears randomly in a plurality of first (second) detection signals.
  • the control unit 21 performs a process of calculating the difference between the first added value (first value) and the second added value (second value), and the first. It is configured to detect the state of the wire rope W based on the detection signal and the addition process based on the second detection signal.
  • the appearance of the signal due to the shaking of the wire rope W (the position where the signal appears in the output waveform) can change randomly, and the appearance of the signal due to the damage of the wire rope W or the like. (The position where the signal appears in the output waveform) is constant.
  • the signals that temporarily appear due to the shaking of the wire rope W or the like are not added and plotted at scattered positions in the output waveform.
  • only the signals caused by the damage of the wire rope W or the like can be added.
  • the signal caused by the damage of the wire rope W or the like can be made relatively large, so that the signal caused by the damage of the wire rope W or the like is buried in the signal temporarily appearing in the wire rope W. Can be suppressed. As a result, damage to the wire rope W can be detected more easily.
  • the control unit 21 has a first addition value (first value) obtained by adding a plurality of first detection signals to each other, and a plurality of first addition values. It is configured to detect the state of the wire rope W based on the difference from the second added value (second value) obtained by adding the two detection signals to each other.
  • first value obtained by adding a plurality of first detection signals to each other
  • second value obtained by adding the two detection signals to each other.
  • the control unit 21 states the wire rope W based on the plurality of second detection signals acquired in the second measurement of the same number of times as the first measurement. Is configured to detect.
  • both the first detection signal and the second detection signal can be used. It is possible to cancel (cancel) a signal based on the magnetic characteristics peculiar to the included wire rope W. As a result, it is possible to more reliably detect a signal caused by damage to the wire rope W or the like.
  • the first detection signal is a detection signal acquired by the wire rope W in an undamaged state.
  • the differential coil 10 is configured to collectively detect the magnetic characteristics of the plurality of wire ropes W.
  • the wire rope W is used in the first measurement of the wire rope W a plurality of times by the differential coil 10 that detects the change in the magnetic field of the wire rope W.
  • a step of acquiring a first addition value (first value) based on a plurality of first detection signals representing the detection signals for each position of is provided.
  • the differential coil 10 is used to generate a plurality of second detection signals representing the detection signals for each position of the wire rope W.
  • the step of acquiring the second addition value (second value) based on is provided.
  • the wire rope inspection method includes a step of detecting the state of the wire rope W based on the difference between the first added value and the second added value.
  • the wire rope W can be detected by detecting the state of the wire rope W based on the difference between the first addition value based on the plurality of first detection signals and the second addition value based on the plurality of second detection signals. It is possible to easily distinguish between a signal that appears due to damage to the rope W or the like and a signal that temporarily appears due to the shaking of the wire rope W or the like. As a result, it is possible to provide a wire rope inspection method capable of easily detecting damage to the wire rope W even when a signal (noise) caused by damage or shaking of the wire rope W is present. ..
  • the wire rope inspection device 200 according to the second embodiment determines the state of the wire rope W based on the difference in all combinations of the plurality of first detection signals and the plurality of second detection signals. Detect.
  • the same configuration as that of the first embodiment is shown with the same reference numerals in the drawings, and the description thereof will be omitted.
  • the wire rope inspection device 200 includes an electronic circuit unit 32.
  • the electronic circuit unit 32 includes a control unit 321.
  • the control unit 321 determines the state of the wire rope W based on the third addition value of the differences in all combinations of the plurality of first detection signals and the plurality of second detection signals. It is configured to detect. Specifically, the control unit 321 adds the differences between the five first detection signals and the five second detection signals in all 25 combinations. That is, when the second detection signal includes a signal caused by damage to the wire rope W or the like, the signal caused by the damage or the like is added 25 times.
  • the third additional value is an example of the "third value" in the claims.
  • the wire rope W inspection method includes a step (step S13) of calculating the difference in all combinations of the plurality of first detection signals and the plurality of second detection signals.
  • the control unit 321 performs alignment control that substantially matches the position where the wire rope W is detected, and calculates the difference in each combination.
  • the wire rope W inspection method includes a step (step S14) of adding the plurality of differences calculated in step S13 to calculate the third added value.
  • the control unit 321 performs the alignment control and adds the plurality of differences.
  • the method for inspecting the wire rope W includes a step (step S15) of detecting the state of the wire rope W based on the third addition value calculated in step S14. Specifically, the control unit 321 outputs a differential result by performing signal processing (differential calculation) on the third addition value calculated in step S14. Then, the control unit 321 determines whether or not the wire rope W has a defect and the size of the defect (scratch or the like) of the wire rope W based on the output differential result.
  • the control unit 321 adds the third addition obtained by adding the differences in all combinations of the plurality of first detection signals and the plurality of second detection signals. It is configured to detect the state of the wire rope W based on the value (third value). With this configuration, the number of times signals are added to each other due to damage to the wire rope W or the like can be easily increased. As a result, it is possible to more reliably suppress that the signal caused by the damage of the wire rope W or the like is buried in the signal temporarily appearing in the wire rope W (improve the S / N ratio).
  • the configuration of the wire rope inspection device 300 according to the third embodiment will be described with reference to FIGS. 12 and 13.
  • the wire rope inspection device 300 of the third embodiment performs differential calculation processing on the difference in all combinations of the plurality of first detection signals and the plurality of second detection signals. Performs addition processing.
  • the same configuration as that of the second embodiment will be illustrated with the same reference numerals in the drawings, and the description thereof will be omitted.
  • the wire rope inspection device 300 includes an electronic circuit unit 42.
  • the electronic circuit unit 42 includes a control unit 421.
  • the control unit 421 is based on the fourth addition value, which is the addition value of the differential values of the differences in all combinations of the plurality of first detection signals and the plurality of second detection signals. , It is configured to detect the state of the wire rope W. Specifically, the control unit 421 performs differential calculation processing on each of the differences in all 25 combinations of the five first detection signals and the five second detection signals.
  • the fourth added value is an example of the "fourth value" in the claims.
  • step S24 the control unit 421 performs signal processing (differential calculation) on each of the plurality of differences calculated in step S13.
  • the wire rope W inspection method includes a step (step S25) of calculating the fourth added value by adding the plurality of differential values calculated in step S24.
  • the control unit 421 performs alignment control that substantially matches the position where the wire rope W is detected, and adds the plurality of differential values calculated in step S24. Then, the control unit 421 determines whether or not the wire rope W has a defect and the size of the defect (scratch or the like) of the wire rope W based on the calculated fourth addition value.
  • the control unit 421 is obtained based on adding the differential values of the differences in all combinations of the plurality of first detection signals and the plurality of second detection signals. It is configured to detect the state of the wire rope W based on the fourth value. With this configuration, it is possible to more reliably suppress the burial in the signal temporarily appearing in the wire rope W (improve the S / N ratio) based on the addition of the differential values.
  • the control unit 21 (321, 421) of the wire rope inspection device 100 (200, 300) has shown an example of detecting the state of the wire rope W. Not limited to this.
  • a device separate from the wire rope inspection device 100 (200, 300) may perform the above control.
  • the wire rope inspection system 500 includes a wire rope inspection device 400 and an external device 900a.
  • the external device 900a is an example of a "control device" in the claims.
  • the wire rope inspection device 400 includes an electronic circuit unit 52. Further, the electronic circuit unit 52 includes a control unit 521. Further, the external device 900a includes a control unit 904.
  • the control unit 521 controls to transmit the first detection signal acquired by the first measurement and the second detection signal acquired by the second measurement to the external device 900a via the communication unit 26.
  • the control unit 904 acquires the first detection signal and the second detection signal via the communication unit 901.
  • the control unit 904 is based on the difference between the plurality of first detection signals acquired by the first measurement of the wire rope inspection device 400 and the plurality of second detection signals acquired by the second measurement of the wire rope inspection device 400. It is configured to detect the state of the wire rope W (see FIG. 2) by the control of any one of the first to third embodiments.
  • the external device 900a is provided with a storage unit (not shown) that stores the detection signal transmitted from the wire rope inspection device 400.
  • the external device 900a it may be a terminal such as a PC or a tablet separate from the wire rope inspection device 400, or it may be a server on the cloud.
  • the state of the wire rope W may be detected by a multiplication process based on the first detection signal and the second detection signal.
  • the difference between the first addition value (first value) between the plurality of first detection signals and the second addition value (second value) between the plurality of second detection signals is not limited to this.
  • the state of the wire rope W may be detected based on the difference between the average value of the plurality of first detection signals and the average value of the plurality of second detection signals.
  • signal processing is performed on the third addition value (third value) of the differences in all combinations of the plurality of first detection signals and the plurality of second detection signals.
  • signal processing may be performed on the average value of the third addition value.
  • the wire rope is based on the fourth addition value (fourth value) of the differential values of the differences in all the combinations of the plurality of first detection signals and the plurality of second detection signals.
  • fourth addition value fourth value
  • An example of detecting the state of W has been shown, but the present invention is not limited to this.
  • the state of the wire rope W may be detected based on the average value of the fourth addition value.
  • first to third embodiments an example in which the number of times of the first measurement and the number of times of the second measurement are equal is shown, but the present invention is not limited to this.
  • the number of first measurements and the number of second measurements may be different.
  • the first detection signal is a detection signal of a wire rope in an undamaged state
  • the first detection signal may be a detection signal of a damaged wire rope.
  • wire rope W may be singular.
  • wire rope inspection device 100 (200, 300) is fixed is shown, but the present invention is not limited to this.
  • the wire rope inspection device 100 (200, 300) may move along the fixed wire rope W.
  • first detection signal and the second detection signal may be acquired by two to four, or six or more, respectively.
  • the wire rope inspection device 100 (200, 300) is fixed in the immediate vicinity of the hoisting machine E2, but the present invention is not limited to this.
  • the mounting position of the wire rope inspection device 100 (200, 300) may be any place where the wire rope W passes, and is not limited.
  • first detection signal and the second detection signal are the data of the outward route of the elevator E, but the present invention is not limited to this.
  • Each of the first detection signal and the second detection signal may include both the outbound data and the inbound data of the elevator E.
  • the inspection method of the wire rope W in this case will be described with reference to FIG.
  • the wire rope W inspection method includes a step (step S31) of acquiring a plurality of first detection signals corresponding to the return path of the elevator E in the first measurement of the wire rope W a plurality of times.
  • step S31 the wire rope W inspection method includes a step (step S31) of acquiring a plurality of first detection signals corresponding to the return path of the elevator E in the first measurement of the wire rope W a plurality of times.
  • three each of the first detection signal on the outward route, the second detection signal on the outward route, the second detection signal on the return route, and the second detection signal on the return route are shown. The number is not limited to this.
  • step S32 a plurality of second detection signals corresponding to the return path of the elevator E are acquired. To be equipped with.
  • the wire rope W inspection method includes a step (step S33) of acquiring the first added value by performing alignment control and adding the plurality of first detection signals (return paths) to each other.
  • the wire rope W inspection method includes a step (step S34) of acquiring a second added value by performing alignment control and adding a plurality of second detection signals (return paths) to each other.
  • the wire rope W inspection method is a step of calculating the difference between the first added value calculated in step S33 and the second added value calculated in step S34 by performing alignment control (step S35). ) Is provided.
  • the wire rope W inspection method includes a step (step S36) of adding the difference calculated in step S5 and the difference acquired in step S35.
  • step S36 the direction alignment control (control to invert the horizontal axis (X axis) of either waveform) is performed.
  • the above addition control is performed. Specifically, in the addition control in step S36, both the direction alignment control and the alignment control are performed.
  • the wire rope W inspection method includes a step (step S37) of detecting the state of the wire rope W by performing signal processing (differential calculation) on the value calculated in step S36.
  • first detection signal and the second detection signal are the data of the outward route of the elevator E, but the present invention is not limited to this.
  • Each of the first detection signal and the second detection signal may include both the outbound data and the inbound data of the elevator E.
  • the inspection method of the wire rope W in this case will be described with reference to FIG.
  • step S41 of acquiring the first detection signal of the above is provided.
  • FIG. 16 shows three each of the first detection signal on the outward route, the second detection signal on the outward route, the second detection signal on the return route, and the second detection signal on the return route. The number is not limited to this.
  • the wire rope W inspection method corresponds to a plurality of second detection signals corresponding to the outward path of the elevator E and the return path of the elevator E in the second measurement of the wire rope W a plurality of times after the first measurement.
  • a step (step S42) of acquiring a plurality of second detection signals to be performed is provided.
  • the wire rope W inspection method includes a step (step S43) of calculating the difference in all combinations of the plurality of first detection signals and the plurality of second detection signals.
  • step S43 the difference between the first detection signal on the outward route and the second detection signal on the return route, and the difference between the first detection signal on the return route and the second detection signal on the outward route. Control is done.
  • arbitrary data among the plurality of differences calculated in step S43 are added to each other.
  • the differences between the first detection signal (outward route) and the second detection signal (outward route) may be added to each other.
  • the difference between the first detection signal (return path) and the second detection signal (return path) may be added to each other.
  • the difference between the first detection signal (outward route) and the second detection signal (return route) may be added.
  • the difference between the first detection signal (return route) and the second detection signal (outward route) may be added to each other.
  • all the differences calculated in step S43 may be added.
  • the method for inspecting the wire rope W includes a step (step S45) of detecting the state of the wire rope W based on the third addition value calculated in step S44.
  • the signal processing (differential calculation) is performed on the third added value calculated in step S44, so that the differential result is output.
  • the same addition processing as in step S44 may be performed using the value differentiated with respect to the difference calculated in step S43.
  • a detection coil that detects changes in the magnetic field of the wire rope A control unit that receives a detection signal acquired by the detection coil is provided.
  • the control unit has a first value based on a plurality of first detection signals acquired by the detection coil in a plurality of first measurements of the wire rope and representing each detection signal for each position of the wire rope, and the first value. Difference from a second value based on a plurality of second detection signals acquired by the detection coil in a plurality of second measurements of the wire rope performed after one measurement and representing detection signals for each position of the wire rope.
  • a wire rope inspection device configured to detect the state of the wire rope based on the above.
  • the control unit has a state of the wire rope based on a process of calculating the difference between the first value and the second value and an addition process based on the first detection signal and the second detection signal.
  • the wire rope inspection apparatus according to item 1, which is configured to detect.
  • the control unit has the first value obtained by adding the plurality of first detection signals to each other and the first value obtained by adding the plurality of second detection signals to each other.
  • the wire rope inspection device according to item 2, which is configured to detect the state of the wire rope based on the difference from the value of 2.
  • the control unit of the wire rope is based on a third value obtained by adding differences in all combinations of the plurality of first detection signals and the plurality of second detection signals.
  • the wire rope inspection apparatus according to item 2 which is configured to detect a condition.
  • the control unit is based on a fourth value obtained by adding the differential values of the differences in all the combinations of the plurality of first detection signals and the plurality of second detection signals.
  • the wire rope inspection apparatus according to item 2 which is configured to detect the state of the wire rope.
  • the control unit is configured to detect the state of the wire rope based on the plurality of second detection signals acquired in the plurality of second measurements of the same number of times as the first measurement.
  • the wire rope inspection apparatus according to any one of items 1 to 5.
  • a plurality of the wire ropes are provided, and the wire ropes are provided.
  • the wire rope inspection device according to any one of items 1 to 7, wherein the detection coil is configured to collectively detect the magnetic characteristics of the plurality of wire ropes.
  • a wire rope inspection device that includes a detection coil that detects changes in the magnetic field of the wire rope, A control device for receiving a detection signal acquired by the detection coil is provided.
  • the control device has a first value based on a plurality of first detection signals acquired by the detection coil in a plurality of first measurements of the wire rope and representing each detection signal for each position of the wire rope, and the first value. Difference from a second value based on a plurality of second detection signals acquired by the detection coil in a plurality of second measurements of the wire rope performed after one measurement and representing detection signals for each position of the wire rope.
  • a wire rope inspection system configured to detect the condition of the wire rope based on the above.
  • the detection coil that detects the change in the magnetic field of the wire rope, in the first measurement of the wire rope a plurality of times, the first value based on the plurality of first detection signals representing the detection signals for each position of the wire rope is acquired. And the process to do After the first measurement, in the second measurement of the wire rope a plurality of times, the detection coil acquires a second value based on a plurality of second detection signals representing the detection signals for each position of the wire rope.
  • Process and A wire rope inspection method comprising a step of detecting a state of the wire rope based on a difference between the first value and the second value.

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Abstract

Une unité de commande (21) de ce dispositif d'inspection de câbles métalliques (100) est configurée pour détecter l'état d'un câble métallique en fonction d'une différence entre une première valeur, basée sur une pluralité de premiers signaux de détection acquis par une bobine de détection (10) lors d'une première mesure permettant de mesurer plusieurs fois un câble métallique (W), et une seconde valeur, basée sur une pluralité de seconds signaux de détection acquis par la bobine de détection lors d'une seconde mesure permettant de mesurer plusieurs fois le câble métallique après la première mesure.
PCT/JP2020/040302 2020-01-28 2020-10-27 Dispositif d'inspection de câbles métalliques, système d'inspection de câbles métalliques et procédé d'inspection de câbles métalliques WO2021152939A1 (fr)

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US20220050152A1 (en) * 2020-08-17 2022-02-17 Shimadzu Corporation Magnetic Material Inspection Device

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US6133731A (en) * 1996-11-07 2000-10-17 Case Technologies Ltd. Method and apparatus for the on-line measurement of the strength of metal cables
JP2001174439A (ja) * 1999-12-21 2001-06-29 Fujitec Kk ワイヤロープ用探傷装置
JP2002116187A (ja) * 2000-10-06 2002-04-19 Mitsui Miike Mach Co Ltd 鋼索用磁気探傷装置および感磁性素子解析方法
JP2017075971A (ja) * 2012-10-30 2017-04-20 東京製綱株式会社 ワイヤロープの損傷判定装置，方法およびプログラム
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US11493574B2 (en) * 2020-08-17 2022-11-08 Shimadzu Corporation Magnetic material inspection device

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