WO2020246131A1 - Système d'examen de câble et procédé d'examen de câble - Google Patents

Système d'examen de câble et procédé d'examen de câble Download PDF

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Publication number
WO2020246131A1
WO2020246131A1 PCT/JP2020/015706 JP2020015706W WO2020246131A1 WO 2020246131 A1 WO2020246131 A1 WO 2020246131A1 JP 2020015706 W JP2020015706 W JP 2020015706W WO 2020246131 A1 WO2020246131 A1 WO 2020246131A1
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Prior art keywords
wire rope
peak waveform
damage
acquired
type
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PCT/JP2020/015706
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English (en)
Japanese (ja)
Inventor
康展 伊藤
信行 山岡
亘 潮
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株式会社島津製作所
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Priority to JP2021524683A priority Critical patent/JP7107438B2/ja
Publication of WO2020246131A1 publication Critical patent/WO2020246131A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • 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 system and a wire rope inspection method.
  • a wire rope inspection device for inspecting the condition of a wire rope.
  • Such a configuration is disclosed, for example, in WO 2018/138850.
  • the above-mentioned International Publication No. 2018/138850 discloses an inspection device for inspecting the state of steel wire rope.
  • This inspection device includes a detection coil that detects a change in the magnetic field of the steel wire rope, and an electronic circuit unit that determines the presence or absence of scratches on the steel wire rope based on a signal from the detection coil.
  • the present invention has been made to solve the above-mentioned problems, and one object of the present invention is to effectively support the maintenance work of the wire rope by detecting the type of damage of the wire rope. It is to provide a wire rope inspection system and a wire rope inspection method which can be performed in the above.
  • the wire rope inspection system includes a detection coil that detects a change in the magnetic field of the wire rope and a control unit that controls to detect the type of damage to the wire rope.
  • the control unit acquires smoothing data, which is data obtained by smoothing the measurement data based on the measurement data acquired by the detection coil, and bases the measurement data based on the acquired smoothing data. It is configured to acquire a line, acquire a peak waveform from the measurement data based on the acquired baseline, and control to detect the type of wire rope damage based on the acquired peak waveform. ..
  • the wire rope inspection method smoothes the measurement data based on the step of detecting the change in the magnetic field of the wire rope and the measurement data obtained by detecting the change in the magnetic field of the wire rope.
  • the step of acquiring the smoothed data which is the data obtained
  • the step of acquiring the baseline of the measurement data based on the smoothed data the step of acquiring the peak waveform from the measurement data based on the baseline, and the peak waveform. It comprises a step of detecting the type of damage to the wire rope based on.
  • the peak waveform is acquired from the measurement data based on the baseline, and the type of damage to the wire rope is detected based on the peak waveform.
  • the wire rope maintenance work is effectively supported by detecting the type of wire rope damage. be able to.
  • FIG. (A) is a diagram showing a state in which measurement data is stored in a first memory and the measurement data stored in the second memory is output to a control unit in the data processing system according to the embodiment.
  • (B) is a diagram showing a state in which measurement data is stored in a second memory and the measurement data stored in the first memory is output to a control unit in the data processing system according to the embodiment.
  • the wire rope inspection system 100 is a system for inspecting the wire rope 101, which is an inspection target.
  • the wire rope inspection system 100 includes a wire rope inspection device 200 that magnetically detects the state of the wire rope 101, and an external device 300 that displays the inspection result of the wire rope 101.
  • the wire rope inspection system 100 is configured to inspect the wire rope 101 for damage by the wire rope inspection device 200 and the external device 300.
  • the wire rope 101 is formed by knitting (for example, strand knitting) a magnetic wire material.
  • the wire rope 101 is, for example, a steel wire rope (steel wire rope).
  • the wire rope 101 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 101 is monitored in order to prevent cutting due to deterioration. Then, the wire rope 101 whose deterioration has progressed from a predetermined amount is replaced.
  • the wire rope inspection device 200 inspects the wire rope 101 while moving the wire rope 101 relative to the surface of the wire rope 101 to be inspected.
  • the wire rope 101 is a moving rope that drives the elevator 400.
  • the elevator 400 includes a car portion 401, a hoisting machine 402 that winds up the wire rope 101 to raise and lower the car portion 401, and a position sensor 403 that detects the position of the car portion 401 (wire rope 101).
  • the inspection is performed with the movement of the wire rope 101 with the wire rope inspection device 200 fixed.
  • the wire rope 101 is arranged so as to extend in the X direction at the position of the wire rope inspection device 200.
  • the wire rope inspection device 200 includes a detection unit 1 and an electronic circuit unit 2.
  • the detection unit 1 includes a detection coil 10 which is a differential coil having a pair of reception coils 11 and 12, and an excitation 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 200 includes a magnetic field application unit 4 (see FIG. 4).
  • An external device 300 is communicably connected to the wire rope inspection device 200 via a communication unit 26.
  • the external device 300 includes a communication unit 301, a control unit 302, a display unit 303, and a storage unit 304.
  • the external device 300 is configured to receive data such as a detection result of damage to the wire rope 101 by the wire rope inspection device 200 via the communication unit 301. Further, the external device 300 is configured to display the damage detection result of the wire rope 101 on the display unit 303 under the control of the control unit 302. Further, the external device 300 is configured to store the damage detection result of the wire rope 101 and the like in the storage unit 304.
  • the wire rope inspection device 200 is configured to detect a change in the magnetic field (magnetic flux) of the wire rope 101 by the detection coil 10.
  • a DC magnetizer is not arranged in the vicinity of the coil of the wire rope inspection device 200.
  • the magnetic field application unit 4 applies a magnetic field in advance to the wire rope 101, which is an inspection object, in the Y direction (the direction intersecting the extending direction of the wire rope 101), and the wire rope is a magnetic material. It is configured to adjust the magnitude and direction of the magnetization of 101.
  • 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 101 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 101 in the extending direction with respect to the detection unit 1.
  • 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 101 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 101 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 member.
  • the detection coil 10 (reception coils 11 and 12) and the excitation coil 13 are each wound a plurality of times along the longitudinal direction with the extending direction of the wire rope 101, which is a magnetic material made of a long material, as a central axis. ing. Further, the detection coil 10 and the excitation coil 13 are coils including a lead wire portion formed so as to be cylindrical along the X direction (longitudinal direction) in which the wire rope 101 extends. Therefore, the surfaces formed by the wound lead wire portions of the detection coil 10 and the excitation coil 13 are substantially orthogonal to each other in the longitudinal direction.
  • the wire rope 101 passes through the inside of the detection coil 10 and the excitation coil 13. Further, the detection coil 10 is provided inside the excitation coil 13.
  • the arrangement of the detection coil 10 and the excitation coil 13 is not limited to this.
  • the receiving coil 11 of the detection coil 10 is arranged on the X1 direction side. Further, the receiving coil 12 of the detection coil 10 is arranged on the X2 direction side.
  • the receiving coils 11 and 12 are arranged at intervals of about several mm to several cm.
  • the excitation coil 13 excites the magnetized state of the wire rope 101. 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 detection coil 10 is configured to transmit the differential signals of the pair of receiving coils 11 and 12. Specifically, the detection coil 10 is configured to detect a change in the magnetic field of the wire rope 101 and transmit a differential signal. The detection coil 10 is configured to detect a change in the magnetic field in the X direction of the wire rope 101, which is an inspection target, and output a detection signal (voltage). That is, the detection coil 10 detects a change in the magnetic field in the X direction intersecting the Y direction with respect to the wire rope 101 to which the magnetic field is applied in the Y direction by the magnetic field application unit 4. Further, the detection coil 10 is configured to output a differential signal (voltage) based on the change in the magnetic field of the detected wire rope 101 in the X direction. Further, the detection 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 (value obtained by multiplying the magnetic field by the magnetic permeability and the area) of the wire rope 101 becomes smaller at the portion with the defect (scratch, etc.).
  • the receiving coil 11 is located at a place having a defect (scratch or the like)
  • the amount of magnetic flux passing through the receiving coil 12 changes as compared with the receiving coil 11, so that the difference in the detection voltage by the detection coil 10
  • the absolute value (differential signal) of is large.
  • the differential signal in the portion without defects (scratches, etc.) is substantially zero.
  • the detection coil 10 detects a clear signal (a signal having a good S / N ratio) indicating the presence of defects (scratches, etc.).
  • the electronic circuit unit 2 can detect the presence of defects (scratches, etc.) in the wire rope 101 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 200.
  • 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 a differential signal from the detection coil 10 and detect the state of the wire rope 101. 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 101 to the external device 300 via the communication unit 26.
  • the receiving I / F 22 is configured to receive a differential signal from the detection 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 detection coil 10 and transmit it to the control unit 21.
  • the storage unit 23 includes a storage medium such as a flash memory and is configured to store information.
  • the excitation I / F 24 is configured to receive a control 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 control unit 21 is configured to perform control to detect the type of damage to the wire rope 101 based on the measurement data 201 acquired by the detection coil 10.
  • the control unit 21 detects wire breakage, fixed deformation due to external pressure (hereinafter, simply referred to as “kink”), and loose twist of the wire rope (hereinafter, simply referred to as “aya”) as types of damage to the wire rope 101. It is configured to control the rope.
  • the control unit 21 controls to acquire the smoothed data 202 (smoothing data) which is the data obtained by smoothing the measurement data 201 based on the measurement data 201. Specifically, the control unit 21 controls to acquire the smoothed data 202 by smoothing the measurement data 201 with a low-pass filter. As a result, as the smoothing data 202, data of the fluctuation component (low frequency component) caused by the deformation of the rope due to the damage of the wire rope is acquired.
  • the smoothing data 202 data of the fluctuation component (low frequency component) caused by the deformation of the rope due to the damage of the wire rope is acquired.
  • control unit 21 controls to acquire the baseline 203 of the measurement data 201 based on the acquired smoothing data 202. Specifically, the control unit 21 controls to acquire the line connecting the intersection 202a between the waveform of the measurement data 201 and the waveform of the smoothing data 202 as the baseline 203.
  • the control unit 21 controls to correct the measurement data 201 based on the acquired baseline 203. Specifically, the control unit 21 makes a correction by subtracting the baseline 203 from the measurement data 201. That is, the control unit 21 makes a correction for subtracting a low frequency component from the measurement data 201. As a result, the corrected measurement data 201 is obtained by excluding the fluctuation component (low frequency component) caused by the deformation of the rope due to the damage of the wire rope.
  • the control unit 21 controls to acquire the peak waveform 204 based on the corrected measurement data 201. Specifically, the control unit 21 controls to acquire the measured value group having a positive value with respect to the baseline 203 as a positive peak waveform 204 in the corrected measurement data 201. Further, the control unit 21 controls to acquire the measured value group having a negative value with respect to the baseline 203 as the negative peak waveform 204 in the corrected measurement data 201. The control unit 21 controls to distinguish between the positive peak waveform 204 and the negative peak waveform 204.
  • the peak waveform 204 is a high-frequency component of the measurement data 201, such as a waveform component indicating damage to the wire rope 101, which remains without being removed during correction by the baseline 203.
  • control unit 21 controls to detect the type of damage of the wire rope 101 based on the acquired peak waveform 204. Specifically, the control unit 21 compares the peak waveform 204 with the reference peak waveform 205 (case peak waveform) (similarity 206 described later), and parameter 207 (peak index) for specifying the peak waveform 204. Based on the above, control is performed to detect the type of damage of the wire rope 101.
  • the control unit 21 damages the wire rope 101 based on the result of comparison between the peak waveform 204 and the reference peak waveform 205, which is a reference waveform indicating the damage of the wire rope 101 of a specific type. Controls to detect the type of.
  • the reference peak waveform 205 is a peak waveform obtained from known data in which the type of damage of the wire rope 101 is known measurement data 201 by the same process as the process of acquiring the peak waveform 204.
  • the reference peak waveform 205 is obtained by acquiring smoothing data which is data obtained by smoothing the known data based on the known data which is the measurement data 201 in which the type of damage of the wire rope 101 is known.
  • the baseline of the known data is acquired based on the smoothed data of the known data, and the peak waveform is acquired from the known data based on the baseline of the acquired known data.
  • the reference peak waveform 205 is stored in advance in the storage unit 23.
  • the storage unit 23 stores a reference peak waveform 205a indicating a wire break, a reference peak waveform 205b indicating a kink, and a reference peak waveform 205c indicating an ear.
  • the number of reference peak waveforms 205 of each damage (wire disconnection, kink, aya) stored in the storage unit 23 may be one or plural.
  • the control unit 21 controls to acquire the comparison result between each of the reference peak waveform 205a indicating the wire breakage, the reference peak waveform 205b indicating the kink, and the reference peak waveform 205c indicating the ear, and the peak waveform 204.
  • control unit 21 controls to acquire the similarity 206 between the peak waveform 204 and the reference peak waveform 205 as a comparison result between the peak waveform 204 and the reference peak waveform 205. Then, the control unit 21 controls to detect the type of damage of the wire rope 101 based on the acquired similarity 206.
  • the control unit 21 divides the peak waveform 204 by a predetermined number of n, acquires the representative values P1 to Pn for the predetermined number n, and acquires them. Control to acquire similarity 206 based on the predetermined number n of representative values P1 to Pn of the peak waveform 204 and the predetermined number of n representative values SP1 to SPn of the reference peak waveform 205. I do.
  • the predetermined number n is not particularly limited as long as it is smaller than the number of the measured value groups constituting the peak waveform 204, but can be, for example, about 7 to 9. Further, the representative values SP1 to SPn of the reference peak waveform 205 can be stored in the storage unit 23 in advance.
  • control unit 21 sets the similarity 206 as a vector of peak waveforms 204 represented by representative values P1 to Pn and a reference peak waveform represented by representative values SP1 to SPn. Control is performed to acquire the COS value of the angle ⁇ formed by the vector of 205.
  • the value of COS ( ⁇ ) can be obtained by the formula shown in FIG. The larger the value of COS ( ⁇ ) (that is, the smaller the angle ⁇ ), the larger the similarity 206, indicating that the peak waveform 204 and the reference peak waveform 205 are similar in shape.
  • COS ( ⁇ ) that is, the larger the angle ⁇
  • COS ( ⁇ ) is an example of similarity 206, and the method for acquiring similarity 206 is not limited to this method.
  • the control unit 21 includes each of the reference peak waveform 205a (see FIG. 6) indicating a wire break, the reference peak waveform 205b indicating a kink (see FIG. 6), and the reference peak waveform 205c indicating an ear (see FIG. 6). , Control to acquire the similarity 206 with the peak waveform 204. At this time, the control unit 21 controls to acquire the similarity 206 for each of the positive and negative peak waveforms 204. This is because when the detection coil 10 is a differential coil, the waveform indicating the damage of the wire rope 101 is a waveform including at least a pair of positive and negative peak waveforms.
  • the control unit 21 acquires a similarity 206 between each of the positive peak waveforms of the reference peak waveform 205c shown and the peak waveform 204.
  • the peak waveform 204 is a negative peak waveform 204
  • the negative peak waveform of the reference peak waveform 205a indicating a wire break
  • the negative peak waveform of the reference peak waveform 205b indicating a kink
  • the reference indicating an aya when the peak waveform 204 is a positive peak waveform 204, the positive peak waveform of the reference peak waveform 205a indicating wire breakage, the positive peak waveform of the reference peak waveform 205b indicating kink, and the aya.
  • the control unit 21 acquires a similarity 206 between each of the negative peak waveforms of the peak waveform 205c and the peak waveform 204. If high similarity is obtained in both the positive peak waveform 204 and the negative peak waveform 204, the damage to the wire rope 101 may be the damage to the reference peak waveform 205 with high similarity.
  • the control unit 21 acquires a positive peak waveform 204 and a negative peak waveform 204 having a high degree of similarity higher than a predetermined value
  • the control unit 21 acquires the waveform.
  • Control is performed to detect the type of damage of the wire rope 101 based on the appearance order of the positive peak waveform 204 and the negative peak waveform 204. This is because the appearance order of the positive peak waveform 204 and the negative peak waveform 204 tends to be different depending on the type of damage of the wire rope 101.
  • the appearance order of the positive and negative peak waveforms 204 is the first order (positive and negative in FIG. 9)
  • the type of damage of the wire rope 101 may be kink or aya.
  • the appearance order of the positive and negative peak waveform 204 is the second order (negative and positive order in FIG. 9) which is the reverse order of the first order
  • the type of damage of the wire rope 101 is wire breakage. It may be.
  • control unit 21 when the control unit 21 acquires a positive peak waveform 204 and a negative peak waveform 204 having a high similarity having a similarity higher than a predetermined value, it is acquired. Control is performed to detect the type of damage to the wire rope 101 based on the number of peak waveforms 204 between the positive peak waveform 204 and the negative peak waveform 204. This is because the number of peak waveforms 204 between the positive peak waveform 204 and the negative peak waveform 204 tends to differ depending on the type of damage of the wire rope 101.
  • the type of damage of the wire rope 101 is wire breakage. Or it could be a kink.
  • the number of peak waveforms 204 between the positive and negative peak waveforms 204 is equal to or more than a predetermined threshold value (that is, when there are many)
  • the type of damage of the wire rope 101 may be Aya.
  • the predetermined threshold value is not particularly limited, but may be 2, for example. This is because when the type of damage to the wire rope 101 is wire breakage or kink, the number of peak waveforms 204 between the positive and negative peak waveforms 204 is often about 0 or 1.
  • control unit 21 acquires the parameter 207 for specifying the peak waveform 204 based on the peak waveform 204, and the wire rope 101 is based on the acquired parameter 207. Controls to detect the type of damage.
  • the control unit 21 damages the wire rope 101 based on the width 207a of the peak waveform 204, the sharpness 207b of the peak waveform 204, and the inclination 207c of the baseline 203 of the peak waveform 204 as parameters 207. Controls to detect the type of.
  • the width 207a of the peak waveform 204 can be, for example, the length of the baseline 203 of the peak waveform 204. That is, the width 207a of the peak waveform 204 can be, for example, the length between the intersection 202a between the waveform of the measurement data 201 and the waveform of the smoothing data 202, which are adjacent to each other.
  • the sharp point 207b of the peak waveform 204 can be, for example, the height 207d of the peak waveform 204 with respect to the width 207a of the peak waveform 204.
  • the height 207d of the peak waveform 204 can be, for example, the length from the baseline 203 to the peak top.
  • the slope 207c of the baseline 203 of the peak waveform 204 can be, for example, the angle formed by the line along the time axis of the measurement data 201 and the baseline 203.
  • the width 207a of the peak waveform 204 tends to differ depending on the type of damage of the wire rope 101. Specifically, when the width 207a of the peak waveform 204 is large, there is a possibility that the type of damage of the wire rope 101 is Aya. Further, when the width 207a of the peak waveform 204 is small, the type of damage of the wire rope 101 may be wire breakage or kink.
  • the size of the width 207a of the peak waveform 204 can be determined, for example, by setting a threshold value for the width 207a.
  • the threshold for width 207a can be set, for example, based on the width of the reference peak waveform 205 (205a-c).
  • the sharpness 207b of the peak waveform 204 tends to differ depending on the type of damage of the wire rope 101. Specifically, when the sharpness 207b of the peak waveform 204 is large, the type of damage of the wire rope 101 may be wire breakage or kink. Further, when the sharp point 207b of the peak waveform 204 is small, there is a possibility that the type of damage of the wire rope 101 is Aya.
  • the size of the sharp point 207b of the peak waveform 204 can be determined by using, for example, the threshold value for the sharp point 207b.
  • the threshold for the sharpness 207b can be set, for example, based on the sharpness of the reference peak waveform 205 (205a-c).
  • the inclination 207c of the baseline 203 of the peak waveform 204 tends to differ depending on the type of damage of the wire rope 101. Specifically, when the inclination 207c of the baseline 203 of the peak waveform 204 is large, there is a possibility that the type of damage of the wire rope 101 is Aya. Further, when the inclination 207c of the baseline 203 of the peak waveform 204 is small, the type of damage of the wire rope 101 may be wire breakage or kink.
  • the magnitude of the slope 207c of the baseline 203 of the peak waveform 204 can be determined by using, for example, the threshold value for the slope 207c.
  • the threshold value for the slope 207c can be set, for example, based on the slope of the baseline 203 of the reference peak waveform 205 (205a-c).
  • the control unit 21 has an evaluation value which is a value indicating that the damage may be the damage for each of the wire breakage, the kink, and the aya based on the similarity 206 and the parameter 207. Is acquired, and control is performed to detect the type of damage of the wire rope 101 based on the acquired evaluation value.
  • control unit 21 follows a predetermined evaluation procedure, and for each of the wire breakage, the kink, and the ear, the evaluation value of the magnitude of the similarity 206 and the appearance order of the positive and negative peak waveforms 204. Evaluation value, evaluation value of the number of peak waveforms 204 between positive and negative peak waveforms 204, evaluation value of width 207a of peak waveform 204, evaluation value of sharp point 207b of peak waveform 204, and baseline 203 of peak waveform 204. Control is performed to acquire the evaluation value of the inclination 207c.
  • control unit 21 acquires the total value of a plurality of evaluation values for each of the wire breakage, the kink, and the wire rope, and removes the damage having the highest total value among the acquired three total values. Control is performed to detect the type of damage of 101. Further, the control unit 21 controls to transmit the detection result of the type of damage of the wire rope 101 to the external device 300.
  • the control unit 302 of the external device 300 controls to display the detected result of the received damage type of the wire rope 101 on the display unit 303.
  • the inspector using the wire rope inspection system 100 can confirm whether the damage of the wire rope 101 is a broken wire, a kink, or an ear.
  • the inspector can perform maintenance work according to the type of damage of the wire rope 101. That is, the inspector determines that if the wire rope 101 is damaged by a broken wire, urgent action is required, or if the wire rope 101 is damaged by a kink, no urgent action is required, but monitoring is required. If the wire rope 101 is damaged, it can be determined that observation is necessary.
  • the wire rope inspection device 200 is configured to be able to detect the type of damage of the wire rope 101 while acquiring the measurement data 201 by the detection coil 10. That is, the wire rope inspection device 200 is configured to be able to detect the type of damage to the wire rope 101 while processing the measurement data 201 in real time.
  • the wire rope inspection device 200 further includes an input controller 27, a first memory 28a, a second memory 28b, and a memory switch 29.
  • the input controller 27 receives the measurement data 201 from the detection coil 10 and transmits it to the first memory 28a or the second memory 28b.
  • the first memory 28a and the second memory 28b store the measurement data 201 received from the input controller 27.
  • the memory switch 29 receives the measurement data 201 from the first memory 28a or the second memory 28b and transmits the measurement data 201 to the control unit 21.
  • the control unit 21 performs the above-mentioned damage detection process of the wire rope 101 based on the measurement data 201 received from the memory switch 29.
  • the wire rope inspection device 200 stores the measurement data 201 in one of the first memory 28a and the second memory 28b, and stores the measurement data 201 in the first memory 28a and the second memory 28a.
  • the measurement data 201 stored in the memory 28b that is not stored is transmitted to the control unit 21 to detect the type of damage to the wire rope 101.
  • the input controller 27 transfers the measurement data 201 received from the detection coil 10 into the first memory 28a. Switch the data path to send. At this time, the memory switch 29 switches the data path so as to connect the second memory 28b and the control unit 21. As a result, the measurement data 201 stored in the second memory 28b is transmitted to the control unit 21. Then, when a predetermined amount of measurement data 201 is stored in the first memory 28a, the input controller 27 transmits the measurement data 201 received from the detection coil 10 to the second memory 28b. The data path is switched. At this time, the memory switch 29 switches the data path so that the first memory 28a and the control unit 21 are connected.
  • the input controller 27 transmits the measurement data 201 received from the detection coil 10 to the second memory 28b. Switch the data path to. At this time, the memory switch 29 switches the data path so as to connect the first memory 28a and the control unit 21. As a result, the measurement data 201 stored in the first memory 28a is transmitted to the control unit 21. Then, when a predetermined amount of measurement data 201 is stored in the second memory 28b, the input controller 27 transmits the measurement data 201 received from the detection coil 10 to the first memory 28a. The data path is switched. At this time, the memory switch 29 switches the data path so that the second memory 28b and the control unit 21 are connected. As described above, the first memory 28a and the second memory 28b do not transmit the measurement data 201 to the control unit 21 while the measurement data 201 is stored from the detection coil 10.
  • control unit 21 can sequentially perform the detection process of the type of damage of the wire rope 101 while sequentially receiving the measurement data 201 stored in the first memory 28a or the second memory 28b. Further, the control unit 21 controls to sequentially transmit the detection of the type of damage of the wire rope 101 to the external device 300. Then, the control unit 302 of the external device 300 controls to sequentially display the received detection result of the type of damage of the wire rope 101 on the display unit 303.
  • the peak waveform 204 is acquired from the measurement data 201 based on the baseline 203, and the type of damage to the wire rope 101 is detected based on the peak waveform 204.
  • the type of damage to the wire rope 101 is detected based on the peak waveform 204.
  • the wire rope 101 by acquiring the peak waveform 204 from the measurement data 201 based on the baseline 203, unlike the case where the peak waveform 204 is acquired without being based on the baseline 203, the wire rope 101 It is possible to obtain an accurate peak waveform 204 in which the low frequency component due to the deformation of the wire rope 101 generated due to the damage is reduced. As a result, the type of damage to the wire rope 101 can be easily detected based on the accurate peak waveform 204 in which the low frequency component due to the deformation of the wire rope 101 generated due to the damage to the wire rope 101 is reduced.
  • the control unit 21 has a measurement value group having a positive value with respect to the baseline 203 and a measurement value group having a negative value with respect to the baseline 203. Is controlled to be acquired as the peak waveform 204.
  • the peak waveform 204 it is possible to obtain both an accurate positive peak waveform 204 and a negative peak waveform 204 in which the low frequency component due to the deformation of the wire rope 101 generated due to the damage of the wire rope 101 is reduced.
  • the damage of the wire rope 101 is based on both the accurate positive peak waveform 204 and the negative peak waveform 204 in which the low frequency component due to the deformation of the wire rope 101 caused by the damage of the wire rope 101 is reduced. The type can be detected more easily.
  • the wire rope inspection system 100 is configured to include a storage unit 23 in which the reference peak waveform 205 is stored. Further, the control unit 21 is configured to perform control to detect the type of damage of the wire rope 101 based on the comparison result between the peak waveform 204 and the reference peak waveform 205. As a result, the type of damage to the wire rope 101 can be detected based on the result of comparison between the peak waveform 204 and the reference peak waveform 205, which shows the characteristics of the damage well, so that the type of damage to the wire rope 101 can be accurately determined. Can be detected.
  • the smoothing data of the known data is acquired based on the known data in which the reference peak waveform 205 is the measurement data 201 in which the type of damage of the wire rope 101 is known.
  • the baseline of the known data is acquired based on the smoothed data of the acquired known data, and the peak waveform acquired from the known data is configured based on the baseline of the acquired known data.
  • the reference peak waveform 205 acquired by the same process as the process for acquiring the peak waveform 204 can be compared with the peak waveform 204, so that the peak waveform 204 and the reference peak waveform 205 can be easily compared. can do.
  • the control unit 21 acquires the similarity 206 between the peak waveform 204 and the reference peak waveform 205 as a comparison result between the peak waveform 204 and the reference peak waveform 205. At the same time, it is configured to control the detection of the type of damage of the wire rope 101 based on the acquired similarity 206. As a result, the type of damage to the wire rope 101 can be detected based on the similarity 206, which shows a good correlation between the peak waveform 204 and the reference peak waveform 205. It can be detected more accurately.
  • the control unit 21 divides the peak waveform 204 by a predetermined number of n, and acquires representative values P1 to Pn for a predetermined number n.
  • the similarity 206 is acquired based on the predetermined number n of representative values P1 to Pn of the acquired peak waveform 204 and the predetermined number of n representative values SP1 to SPn of the reference peak waveform 205. It is configured to perform control. As a result, the similarity 206 between the peak waveform 204 and the reference peak waveform 205 can be obtained in a state where the peak waveform 204 is compressed to the representative values P1 to Pn for several n predetermined values. It is possible to reduce the processing load of the process of acquiring 206.
  • the control unit 21 acquires a positive peak waveform 204 and a negative peak waveform 204 having a high similarity with a similarity 206 higher than a predetermined value, the acquired positives are obtained. Based on the appearance order of the peak waveform 204 and the negative peak waveform 204 of the wire rope 101, the control for detecting the type of damage of the wire rope 101 is performed. As a result, the type of damage to the wire rope 101 can be easily detected by utilizing the fact that the appearance order of the positive peak waveform 204 and the negative peak waveform 204 differs depending on the type of damage to the wire rope 101.
  • the control unit 21 acquires a positive peak waveform 204 and a negative peak waveform 204 having a high similarity with a similarity 206 higher than a predetermined value, the acquired positives are obtained. Based on the number of peak waveforms 204 between the peak waveform 204 and the negative peak waveform 204 of the wire rope 101, the control for detecting the type of damage of the wire rope 101 is performed. As a result, the type of damage to the wire rope 101 can be easily detected by utilizing the fact that the number of peak waveforms 204 between the positive peak waveform 204 and the negative peak waveform 204 differs depending on the type of damage to the wire rope 101. can do.
  • the control unit 21 acquires the parameter 207 for specifying the peak waveform 204 based on the peak waveform 204, and the wire rope 101 is damaged based on the acquired parameter 207. It is configured to control to detect the type of. As a result, the type of damage to the wire rope 101 can be detected based on the parameter 207 indicating the shape of the peak waveform 204. Therefore, it is utilized that the shape of the peak waveform 204 differs depending on the type of damage to the wire rope 101. Therefore, the type of damage to the wire rope 101 can be accurately detected.
  • the control unit 21 is based on the width 207a of the peak waveform 204, the sharpness 207b of the peak waveform 204, and the slope 207c of the baseline 203 of the peak waveform 204 as parameters 207. Therefore, it is configured to control the detection of the type of damage of the wire rope 101.
  • the width 207a of the peak waveform 204, the sharpness 207b of the peak waveform 204, and the inclination 207c of the baseline 203 of the peak waveform 204 differ depending on the type of damage of the wire rope 101. The type of damage can be detected easily and accurately.
  • the control unit 21 detects wire breakage, fixed deformation (kink) due to external pressure, and loose twist of the wire rope (ear) as the type of damage to the wire rope 101. It is configured to perform control. As a result, it is possible to detect wire breakage, fixed deformation (kink) due to external pressure, and loose twist (ear) of the wire rope 101, which are likely to occur in the wire rope 101. Kind detection can be performed effectively.
  • wire ropes may be used in configurations other than elevators such as cranes, suspension bridges and robots.
  • an external device of the wire rope inspection system may detect and control the type of damage to the wire rope.
  • the control unit of the external device acquires the smoothing data of the measurement data based on the measurement data acquired by the detection coil, and acquires the baseline of the measurement data based on the acquired smoothing data. Then, the peak waveform may be acquired from the measurement data based on the acquired baseline, and control may be performed to detect the type of damage to the wire rope based on the acquired peak waveform.
  • the detection coil is a differential coil having a pair of receiving coils, but the present invention is not limited to this.
  • the detection coil may be composed of a single coil.
  • wire breakage wire breakage
  • fixed deformation due to external pressure kink
  • loose twist of the wire rope aya
  • the present invention is not limited to this.
  • any one or two of wire breakage, fixed deformation due to external pressure (kink), and loose wire twist (aya) may be detected.
  • damage other than wire breakage, fixed deformation due to external pressure (kink), and loose twist of the wire rope (aya) may be detected.
  • the evaluation value is acquired based on both the similarity and the parameter, and the type of damage to the wire rope is detected based on the acquired evaluation value.
  • the present invention is not limited to this.
  • the evaluation value may be acquired based on only one of the similarity and the parameter, and the type of damage to the wire rope may be detected based on the acquired evaluation value.
  • the peak waveform when the similarity is acquired, the peak waveform is divided by a predetermined number of minutes, but the present invention is not limited to this.
  • the peak waveform when the similarity is acquired, the peak waveform does not necessarily have to be divided by a predetermined number of minutes. That is, the similarity between the peak waveform and the reference peak waveform may be acquired without dividing the peak waveform by a predetermined number of minutes.
  • the type of damage of the wire rope when the type of damage of the wire rope is detected based on the similarity, the magnitude of the similarity, the order of appearance of the positive peak waveform and the negative peak waveform of the high similarity, and An example is shown in which the type of wire rope damage is detected based on the number of peak waveforms between positive and negative peak waveforms with high similarity, but the present invention is not limited to this.
  • the type of wire rope damage when the type of wire rope damage is detected based on the similarity, the magnitude of the similarity, the order of appearance of the positive and negative peak waveforms of the high similarity, and the high similarity.
  • the type of wire rope damage may be detected based on any one or two of the number of peak waveforms between the positive and negative peak waveforms of.
  • the type of wire rope damage is detected based on the similarity, the magnitude of the similarity, the order of appearance of the positive and negative peak waveforms of the high similarity, and the positive of the high similarity.
  • the type of wire rope damage may be detected based on the number of peak waveforms between the peak waveform and the negative peak waveform of.
  • the width of the peak waveform, the sharpness of the peak waveform, and the inclination of the baseline of the peak waveform are used as the basis for the wire rope.
  • the present invention is not limited to this.
  • the type of wire rope damage when the type of wire rope damage is detected based on the parameters, one or two of the width of the peak waveform, the sharpness of the peak waveform, and the slope of the baseline of the peak waveform.
  • the type of damage to the wire rope may be detected based on.
  • the type of wire rope damage is based on the parameters, the type of wire rope damage is based on other than the width of the peak waveform, the sharpness of the peak waveform, and the slope of the baseline of the peak waveform. It may be detected.
  • a detection coil that detects changes in the magnetic field of the wire rope A control unit that controls to detect the type of damage to the wire rope is provided.
  • the control unit acquires smoothing data which is data obtained by smoothing the measurement data based on the measurement data acquired by the detection coil, and based on the acquired smoothing data, the measurement data of the measurement data.
  • a baseline is acquired, a peak waveform is acquired from the measurement data based on the acquired baseline, and control is performed to detect the type of damage to the wire rope based on the acquired peak waveform.
  • the wire rope inspection system is configured in.
  • the control unit controls to acquire a group of measured values having a positive value with respect to the baseline and a group of measured values having a negative value with respect to the baseline as the peak waveform.
  • the reference peak waveform is obtained by acquiring smoothing data, which is data obtained by smoothing the known data, based on known data in which the type of damage to the wire rope is known measurement data.
  • smoothing data which is data obtained by smoothing the known data, based on known data in which the type of damage to the wire rope is known measurement data.
  • the item 3 wherein a baseline of the known data is acquired based on the smoothed data and is a peak waveform acquired from the known data based on the acquired baseline of the known data. Wire rope inspection system.
  • the control unit acquires the similarity between the peak waveform and the reference peak waveform, and based on the acquired similarity, said the control unit.
  • the wire rope inspection system according to item 3 or 4 which is configured to control the detection of the type of wire rope damage.
  • the control unit divides the peak waveform by a predetermined number of minutes to acquire a predetermined number of representative values, and also obtains a predetermined number of representative values of the acquired peak waveform.
  • the control unit is configured to acquire a parameter for identifying the peak waveform based on the peak waveform and to perform control to detect the type of damage to the wire rope based on the acquired parameter.
  • the wire rope inspection system according to any one of items 1 to 8.
  • the control unit damages the wire rope based on at least one of the width of the peak waveform, the sharpness of the peak waveform, and the slope of the baseline of the peak waveform as the parameters.
  • the wire rope inspection system according to item 9 which is configured to control the detection of the type of wire rope.
  • the control unit is configured to control to detect at least one of wire breakage, fixed deformation due to external pressure, and loose twist of the wire rope as a type of damage to the wire rope. ,
  • the wire rope inspection system according to any one of items 1 to 10.
  • Steps to detect changes in the magnetic field of the wire rope Based on the measurement data acquired by detecting the change in the magnetic field of the wire rope, the step of acquiring the smoothing data which is the data obtained by smoothing the measurement data, and A step of acquiring a baseline of the measurement data based on the smoothing data, A step of acquiring a peak waveform from the measurement data based on the baseline, A wire rope inspection method comprising a step of detecting a type of damage to the wire rope based on the peak waveform.
  • Detection coil 21 Control unit 23 Storage unit 100 Wire rope inspection system 101 Wire rope 201 Measurement data 202 Smoothing data 203 Baseline 204 Peak waveform 205, 205a to c Reference peak waveform 206 Similarity 207 Parameter 207a Peak waveform width 207b Peak Waveform sharpness 207c Baseline slope of peak waveform n Predetermined number P1 to Pn Predetermined number of representative values of peak waveform SP1 to SPn Reference value of predetermined number of peak waveform

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Abstract

Le présent système d'examen de câble (100) obtient des données lissées (202) de données mesurées sur la base de données mesurées (201) qui ont été obtenues par une bobine de détection (10), obtient la ligne de base (203) des données mesurées sur la base des données lissées obtenues, obtient la forme d'onde de crête (204) à partir des données mesurées sur la base de la ligne de base obtenue, et détecte le type de détérioration dans un câble sur la base de la forme d'onde de crête obtenue.
PCT/JP2020/015706 2019-06-05 2020-04-07 Système d'examen de câble et procédé d'examen de câble WO2020246131A1 (fr)

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CN112723071A (zh) * 2020-12-28 2021-04-30 上海三菱电梯有限公司 电梯部件性能监测方法
US20220050152A1 (en) * 2020-08-17 2022-02-17 Shimadzu Corporation Magnetic Material Inspection Device
EP4145121A1 (fr) * 2021-09-03 2023-03-08 Shimadzu Corporation Procédé d'inspection de câble métallique et système d'inspection de câble métallique

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JPH06331602A (ja) * 1993-05-14 1994-12-02 Ndt Technol Inc 長物磁性材の構造欠陥を非破壊的に検査する方法および装置
JPH07306185A (ja) * 1994-05-10 1995-11-21 Sumitomo Electric Ind Ltd 非鉄線材中の強磁性体検出方法
WO2018109824A1 (fr) * 2016-12-13 2018-06-21 東京製綱株式会社 Procédé de détection de dommages d'un câble métallique, et dispositif de traitement de signaux et dispositif de détection de dommages servant à la détection de dommages d'un câble métallique
JP2020008500A (ja) * 2018-07-11 2020-01-16 株式会社島津製作所 磁性体検査システム、磁性体検査装置および磁性体検査方法

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JPS55126853A (en) * 1979-03-26 1980-10-01 Furukawa Electric Co Ltd:The Electromagnetic induction flaw detecting method
JPH06331602A (ja) * 1993-05-14 1994-12-02 Ndt Technol Inc 長物磁性材の構造欠陥を非破壊的に検査する方法および装置
JPH07306185A (ja) * 1994-05-10 1995-11-21 Sumitomo Electric Ind Ltd 非鉄線材中の強磁性体検出方法
WO2018109824A1 (fr) * 2016-12-13 2018-06-21 東京製綱株式会社 Procédé de détection de dommages d'un câble métallique, et dispositif de traitement de signaux et dispositif de détection de dommages servant à la détection de dommages d'un câble métallique
JP2020008500A (ja) * 2018-07-11 2020-01-16 株式会社島津製作所 磁性体検査システム、磁性体検査装置および磁性体検査方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220050152A1 (en) * 2020-08-17 2022-02-17 Shimadzu Corporation Magnetic Material Inspection Device
US11493574B2 (en) * 2020-08-17 2022-11-08 Shimadzu Corporation Magnetic material inspection device
CN112723071A (zh) * 2020-12-28 2021-04-30 上海三菱电梯有限公司 电梯部件性能监测方法
EP4145121A1 (fr) * 2021-09-03 2023-03-08 Shimadzu Corporation Procédé d'inspection de câble métallique et système d'inspection de câble métallique

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