JP2023074655A - Inspection system and inspection method for wire rope - Google Patents

Abstract

To provide an inspection system for determining an abnormal state of a wire rope in a machine plant to propose countermeasures according to a determination result.SOLUTION: An inspection system for inspecting a wire rope of an elevator, comprises: a flaw detection device that measures leaked magnetic flux in a radial direction and a longitudinal direction of a wire rope using a directional magnetic sensor; and an inspection device that determines, based on a combination of magnitudes of the leaked magnetic flux in the radial direction and the longitudinal direction measured by the flaw detection device, the breakage state of a wire element constituting the wire rope, and outputs countermeasures based on the combination of the breakage state and a groove shape of a traction sheave.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a wire rope inspection apparatus and inspection method, and more particularly to an inspection system and inspection method for inspecting broken wires in wire ropes used in mechanical equipment such as elevators.

Wire ropes used in mechanical equipment such as elevators, lifts, cable cars, hoists, and cranes generally consist of strands made by twisting multiple steel wires (hereinafter referred to as "strand wires"). , which is constructed by twisting a plurality of strands. In such a wire rope, the strands constituting the wire rope break little by little due to fatigue and abrasion caused by bending and contact when passing through the traction sheave. When the number of wire breaks exceeds a predetermined reference value, it is determined that the wire rope has reached the end of its service life, and the wire rope is replaced.

For this reason, it is necessary to measure the number of broken strands and evaluate whether the wire rope can be used safely by regular inspections. The number of breaks is defined by the number of wire breaks per unit length, and is defined by the structure of the wire rope (number of strands, wire diameter, etc.).

Conventionally, visual inspection has been performed to inspect the number of wire rope breaks during use. However, when inspecting a long wire rope, visual inspection has the problem of requiring a long work time. For this reason, it has been proposed to quantitatively measure the number of breaks in a wire rope using a flaw detector (wire rope tester) using leakage flux flaw detection.

For example, in Patent Document 1 (particularly, FIGS. 3, 4, 10, paragraphs 0060, 0070 to 0078, etc.), the measured voltage Vs and the peak voltage Vp of the detection coil arranged opposite to the wire rope are compared with a predetermined threshold value. proposed a wire rope damage determination device that detects an abnormality in a wire rope and alerts or issues a warning.

JP 2017-75971 A

Wire rope breakage is mainly caused by ridge breakage caused by abrasion at the contact portion between the wire rope and the traction sheave, and abrasion at the contact portion between strands (or strand and fiber core). There is a valley cut. In addition, the groove shape of the traction sheave mainly includes a V groove in which contact with the wire rope is point contact, and a U groove in which contact with the wire rope is surface contact. Some have undercut processing that increases traction by reducing the contact area with the wire rope.

When the groove shape of the traction sheave is V-groove, the wire rope is prone to ridge breakage. Therefore, the aging state of the wire rope is largely determined by the combination of groove shapes of the wire rope and the traction sheave and the number of times the wire rope is used (the number of times the wire rope passes through the sheave and sheave).

The above-mentioned Patent Document 1 detects an abnormality in the wire rope by comparing the measured voltage Vs and the peak voltage Vp, which are the outputs of the detection coil, with a predetermined threshold value. , could not distinguish whether it was due to factors other than aging deterioration. For this reason, when the wire rope deteriorates early due to an abnormality of the traction sheave, it is not possible to propose countermeasures according to the abnormality, such as proposing maintenance of the traction sheave, to the operator or manager. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an inspection system and an inspection method that can determine the mode of abnormality in a wire rope of machinery and equipment and propose countermeasures according to the determination result.

An inspection system for inspecting a wire rope of an elevator, comprising: a flaw detector that measures the leakage magnetic flux in the radial direction and the longitudinal direction of the wire rope using a directional magnetic sensor; an inspection device for judging the state of breakage of the wire constituting the wire rope based on the combination of the magnitude of the leakage magnetic flux in the longitudinal direction and outputting countermeasures based on the combination of the state of breakage and the groove shape of the traction sheave; An inspection system comprising:

According to the inspection system and the inspection method of the present invention, it is possible to determine the mode of abnormality of the wire rope of the mechanical equipment and propose countermeasures according to the determination result.

1 is a schematic configuration diagram of a wire rope inspection system of one embodiment; FIG. 1 is a functional block diagram of an inspection device according to an embodiment; FIG. Schematic cross-sectional view showing arrangement of magnetic sensors of one embodiment Schematic side view showing arrangement of magnetic sensors of one embodiment FIG. 5 is a diagram showing an example of measured waveforms when a wire rope is broken. FIG. 10 is a diagram showing an example of measured waveforms when a valley break occurs in the wire rope; An example of an evaluation table used in one embodiment. An example of a countermeasure table used in one embodiment. 4 is a flow chart showing an inspection process used in one embodiment; An example of a display screen of a worker terminal device or a manager terminal device.

A wire rope inspection system according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a 1:1 roping type elevator and a wire rope inspection system installed in this elevator. This 1:1 roping type elevator is an elevator equipped with a car 1, a counterweight 2, a wire rope 3, a traction sheave 4 and a deflection wheel 5. It should be noted that the elevator roping method is not limited to the methods exemplified here.

The wire rope inspection system of FIG. 1 is a system for inspecting wire breaks in the wire rope 3 of an elevator, and includes a flaw detection device 6 , an inspection device 7 , and a signal processing database 8 . The wire rope inspection system of the present invention may inspect wire ropes used in other types of mechanical equipment such as lifts, cable cars, hoists, and cranes.

The flaw detection device 6 is a device containing a plurality of magnetic sensors 6a arranged so as to surround the outer surface of the wire rope 3, and measures the leakage magnetic flux of the wire rope 3 using each magnetic sensor 6a. The inspection device 7 is a device that inspects the wire rope 3 for abnormality using leakage magnetic flux data measured by the flaw detection device 6 . The signal processing database 8 is a database that stores various tables (evaluation table T1, countermeasure table T2, etc.) used when the inspection device 7 performs inspection. In FIG. 1, the flaw detection device 6, the inspection device 7, and the signal processing database 8 are illustrated as independent devices, but the flaw detection device 6 and the inspection device 7 may be integrally configured, and the signal processing database 8 may be provided inside the inspection device 7 .

After installing the wire rope inspection system having such a configuration in the elevator, the flaw detector 6 moves the wire rope 3 by moving the car 1 from the bottom floor to the top floor (or from the top floor to the bottom floor). leakage magnetic flux can be measured over the entire length of Then, the inspection device 7 can inspect the abnormality of the wire rope 3 using the measured leakage magnetic flux data.

The wire rope inspection system of this embodiment is also a system for providing information based on inspection results to workers, administrators, and the like. Therefore, the flaw detection device 6 and the inspection device 7 are connected to a center device 91, an operator terminal device 92, and an administrator terminal device 93 via a wired or wireless network 9 (the Internet, etc.).

Here, the center device 91 can be realized by a so-called server computer, and receives various information from the flaw detection device 6, the inspection device 7, or the signal processing database 8. FIG. Using this information, the center device 91 creates a maintenance schedule for inspection, replacement, and the like. The center device 91 can notify the operator terminal device 92, manager terminal device 93, etc. of this result via the network 9. FIG. Here, the worker terminal device 92 and the manager terminal device 93 can be realized by a computer such as a notebook PC.

<Inspection device 7>
Next, the details of the inspection device 7 will be described with reference to the functional block diagram of FIG. As illustrated, the inspection device 7 is a device having a processing section 71 , a memory section 72 , an interface section 73 , a data input/output section 74 and a communication section 75 .

The processing unit 71 is a CPU (Central Processing Unit) or the like having a function of performing calculations according to a program. In this embodiment, the processing unit 71 executes processing according to a wire breakage type determination program 71a, a wire breakage number determination program 71b, and a deterioration state determination program 71c developed in the memory unit 72. FIG. The functions of each program may be realized by hardware such as SOC (System-on-a-chip). In this case, the functions of each program can be implemented as a wire breakage type analysis unit, wire breakage number detection unit, and deterioration state determination unit, respectively. The functions of each program and each part will be described later. Moreover, each of these programs may be realized by one program, or may be further subdivided. Further, it may be realized by combining some of these or subdividing some of them into programs.

The interface unit 73 is an input/output device that receives inputs from system users (workers and administrators) and displays outputs. Therefore, the interface unit 73 can be implemented by, for example, a touch panel. However, the interface unit 73 may be configured by separating the input unit and the output unit, and when using the worker terminal device 92 or the manager terminal device 93 as an input device, the interface unit 73 itself may not be provided. .

The data input/output unit 74 is connected to the flaw detection device 6 and the determination processing database 8 to exchange information with them. Here, the determination processing database 8 stores a table T for determining the deterioration state from the relationship between the groove shape and the wire rope 3 and the measurement signal, the contents of which will be described later.

The communication unit 75 has a function of connecting to the network 9, and transmits inspection results such as the number of wire breakages to the center device 91 or the like. The communication unit 75 also receives information from the center device 91, the operator terminal device 92, the manager terminal device 93, and the like.

<Relationship between groove shape of traction sheave 4 and wire breakage of wire rope 3>
Here, the relationship between the groove shape of the traction sheave 4 and the wire breakage of the wire rope 3 will be described.

As described above, there are mainly two groove shapes of the traction sheave 4: a V groove shape in which the wire rope 3 and the groove are in point contact, and a U groove shape in which the wire rope 3 and the groove are in surface contact. In addition, some U-grooves are undercut processed to reduce the contact area with the rope by shaving the bottom surface of the groove to increase traction.

If the groove shape of the traction sheave 4 is different, the contact area (surface pressure of the contact portion) between the wire rope 3 and the groove is changed, so that the traction (pulling force) is also different. The magnitude of traction of the traction sheave 4 is generally in the order of V groove>U groove with undercut>U groove. This is because the smaller the contact area between the wire rope 3 and the groove, the greater the surface pressure at the contact portion.

However, as the surface pressure increases, the wear of the wire rope 3 tends to progress more quickly, so the surface wear of the wire rope 3 is proportional to the traction. That is, there is a tendency that the wire rope 3 is likely to be broken in the order of V groove>U groove with undercut>U groove. On the other hand, wear of the troughs due to contact between the strands 3b occurs due to repeated bending. For this reason, the more V-shaped grooves are more likely to cause ridge breaks, and the more likely U-grooves are to cause valley breaks. Aspects change.

In this way, if the usage conditions (wire rope type, sheave groove shape, etc.) and the usage situation (number of times of bending) of the elevator are known, the progress of deterioration of the wire rope 3 during normal use (type of wire breakage, wire breakage, etc.) It is possible to estimate the number of wire breakages), and when the actual number of wire breakages exceeds the specified number, it is determined that the replacement standard has been reached and replacement is performed. On the other hand, if the type and number of wire breakages observed are significantly different from those estimated, it is determined that abnormal deterioration has occurred even if the number of wire breakages is less than the above specified number. and urgent action is required. Details will be described later.

<Arrangement of Magnetic Sensor 6a>
Next, the arrangement of the magnetic sensor 6a with respect to the wire rope 3 will be described with reference to FIGS. 3 and 4. FIG. Although the magnetic sensor 6a is installed inside the flaw detection device 6, the illustration of the flaw detection device 6 is omitted in FIGS.

3 shows a cross-sectional view of the wire rope 3, and FIG. 4 shows a side view of the wire rope 3. As shown in FIG. As shown in both figures, the wire rope 3 is constructed by twisting a plurality of (e.g., eight) strands 3b (see FIG. 3) arranged around a fiber core 3a (see FIG. 4). A magnetic sensor 6a (a magnetic sensor with directivity such as a Hall sensor, a GMR sensor, etc.) capable of individually measuring leakage magnetic fluxes in the directions of three orthogonal axes (X, Y, Z) is attached to the wire rope 3 having such a configuration. , arranged as follows:

That is, as shown in FIG. 3, each magnetic sensor 6a is arranged outside the wire rope 3 so that the radial direction of the wire rope 3 and the Y direction of the magnetic sensor 6a are aligned. Thereby, the leakage magnetic flux in the radial direction at each position of the wire rope 3 can be individually measured. In the example of FIG. 3, the same number of magnetic sensors 6a as the number of surface irregularities of the wire rope 3 (if the number of strands 3b is eight, the number of surface irregularities is 16). is not limited to this example.

Further, as shown in FIG. 4, each magnetic sensor 6a is arranged outside the wire rope 3 so that the longitudinal direction of the wire rope 3 and the X direction of the magnetic sensor 6a are aligned. As a result, the leakage magnetic flux in the longitudinal direction at each position of the wire rope 3 can be individually measured. If the width of the magnetic sensor 6a in the Z direction is large relative to the diameter of the wire rope, the magnetic sensors will interfere with each other if all the magnetic sensors 6a are arranged in a line. Although the magnetic sensors 6a are staggered and arranged in two rows, if the width of the magnetic sensors 6a in the Z direction is small with respect to the diameter of the wire rope, all the magnetic sensors 6a may be arranged in a row.

<Method for judging mountain cuts and valley cuts>
Next, using FIGS. 5 and 6, a description will be given of a method for judging a mountain break occurring in a convex portion on the surface of the wire rope 3 and a valley break occurring in a concave portion on the surface. As shown in FIGS. 3 and 4, when the sensitivity direction of the magnetic sensor 6a is set so that X is aligned with the longitudinal direction of the rope and Y is aligned with the radial direction of the rope, the leakage magnetic flux at the position where the crest occurs is X, Y large in both axial directions. On the other hand, a large amount of leakage magnetic flux is generated only in the X-axis direction at the position where the valley break occurs.

Therefore, in the output voltage V, which indicates the amount of leakage magnetic flux measured by the magnetic sensor 6a, both the output voltage _VX in the X-axis direction and the output voltage _VY in the Y-axis direction increase at the crest position. At position, only the output voltage _VX in the X-axis direction is increased. Therefore, if the output voltage _{VY is} also large at the timing when a large output voltage _VX is detected, it can be determined that a peak break has occurred at that position. It can be determined that disconnection has occurred.

FIG. 5 illustrates the output voltages V _X and V _Y of the magnetic sensor 6a at the mountain break position. In this example, at the timing when the peak value of the output voltage _VX exceeds the predetermined threshold value _ThX , the peak value of the output voltage _VY also exceeds the predetermined threshold value _ThY . It can be determined that

Further, FIG. 6 illustrates the output voltages V _X and V _Y of the magnetic sensor 6a at the trough position. In this example, at the timing when the peak value of the output voltage _VX exceeds the predetermined threshold value _ThX , the peak value of the output voltage _VY does not exceed the predetermined threshold value _ThY , so a valley break occurs at that position. It can be determined that

By using the above principle, the inspection apparatus 7 of the present embodiment can detect the wire rope from the magnitude of the output voltage _VY of the same magnetic sensor 6a at the timing when a certain magnetic sensor 6a observes a large output voltage _VX . It is possible to determine whether the wire breakage of 3 is classified as a mountain break or a valley break.

<Determination method of aged deterioration and abnormal deterioration>
Next, a method of using the table T in the signal processing database 8 by the inspection device 7 will be described with reference to FIGS. 7A and 7B.

As described above, the mode of wire breakage usually depends on the groove shape of the traction sheave 4 . For example, if two types of groove shapes, a V groove and a U groove, are assumed for the traction sheave 4, the following information is registered in the evaluation table T1 and the countermeasure table T2 in the signal processing database 8, respectively. Keep

The evaluation table T1 shown in FIG. 7A is a table used by the inspection device 7 to determine the mode of wire breakage of the wire rope 3. , "abnormal wire breakage rate", "threshold for life determination", "inspection period", and "wire breakage mode" are registered.

For example, when the groove shape of the traction sheave 4 is a V-groove, the "sheave groove shape" in the evaluation table T1 is a V-groove. In the case of V-grooves, crest breakage is usually the major strand breakage, so the "normal strand breakage mode" is crest breakage. In the case of the V-groove, valley breaks are abnormal wire breaks, so the ratio of the number of valley breaks to the total number of breaks is used as an index indicating the degree of abnormality "abnormal wire breakage rate". As a result, in the evaluation table T1 of FIG. 7A, the "threshold value for judging the lifespan" of the rope is changed according to the level of the occurrence rate of valley breakage. In addition, in the evaluation table T1, whether or not the "inspection period" should be shortened is set according to the frequency of occurrence of valley breakage, which is considered not to be deterioration over time. I'm judging.

Similarly, when the groove shape of the traction sheave 4 is a U-groove, the "sheave groove shape" in the evaluation table T1 is a U-groove. In the case of the U-groove, valley breakage is usually the main wire breakage, so the data for the "normal wire breakage mode" is valley breakage. In the case of the U-groove, ridge breaks are abnormal wire breaks, so the ratio of the number of ridge breaks to the total number of fractures is used as an index indicating the degree of abnormality, the "abnormal wire breakage rate." Accordingly, in the evaluation table T1 of FIG. 7A, the "threshold for judging the lifespan" of the rope is changed according to the level of the mountain breakage rate. Further, in the evaluation table T1, whether or not the "inspection cycle" should be shortened is set according to the degree of occurrence of mountain breakage, which is considered not to be deterioration over time, and the "wire breakage mode" is set to either valley breakage or mountain breakage. I'm judging.

Here, for example, when the traction sheave 4 is a V groove and the ratio of the number of valley breaks to the total number of breaks is 100%, the inspection device 7 determines the life of the wire rope 3 based on the evaluation table T1. The threshold value used for is set to A% of the reference number of ruptures defined by standards and the like. On the other hand, when the ratio of the number of valley breaks to the total number of breaks is less than 100% and 80% or more, the inspection device 7 sets the threshold value for the number of breaks used for life determination of the wire rope 3 based on the evaluation table T1. is set to B% (A<B) of the reference number of breaks. In this way, the inspection device 7 sets a smaller threshold value for the number of breaks used for determining the life of the wire rope 3 as the occurrence rate of valley breaks, which is considered not to be deterioration over time, is higher. It can be determined that the wire rope 3 has reached the end of its life.

If the number of wire breakages is extremely small, the occurrence rate of abnormal wire breakage can easily reach 100%. , it is desirable to change the "threshold for life determination" only when the total number of wire breakages exceeds a predetermined threshold. In this example, the rate of occurrence of valley breakage is divided into four stages depending on the sheave shape of the V groove and U groove, but the life of the rope may be judged by further dividing it.

On the other hand, the countermeasure table T2 shown in FIG. This is a table used to search for countermeasures, in which the relationships among "sheave groove shape", "determined wire breakage mode", "estimated cause of wire breakage", and "emergency countermeasures" are registered. ing.

For example, if the "sheave groove shape" is a V groove and the "wire breakage mode" determined based on the evaluation table T1 is a mountain break, the inspection device 7 refers to the countermeasure table T2 to It is assumed that the cause of this is deterioration over time, and it is judged that emergency measures are unnecessary. On the other hand, if the "sheave groove shape" is a V groove and the "wire breakage mode" determined based on the evaluation table T1 is a valley break, the inspection device 7 refers to the countermeasure table T2 and Register an emergency measure corresponding to the cause of wire breakage. Similar information is registered when the sheave groove shape is a U groove.

The information extracted from the evaluation table T1 and the countermeasure table T2 by the inspection apparatus 7 in this way (threshold value for life determination, necessity of shortening the inspection cycle, cause of wire breakage, details of emergency countermeasures, etc.) is transmitted through the network 9. Since the information is provided to the center device 91, the worker terminal device 92, and the manager terminal device 93 via, the worker and the manager can know the countermeasure according to the state of abnormality of the wire rope 3.

<Rope inspection processing flow chart>
Next, a processing procedure for rope inspection by the wire rope inspection system described above will be described with reference to the processing flowchart of FIG.

First, in step S1, the specification of the elevator to be inspected (such as the sheave groove shape of the traction sheave 4) is received from the worker or manager using the worker terminal device 92 or the manager terminal device 93. FIG.

Next, in step S2, the wire breakage of the wire rope 3 as a whole is detected using the flaw detection device 6 and the inspection device 7 .

In step S3, the inspection device 7 calculates the number of wire breakages on the peak side and the valley side based on the X-direction output voltage _VX and the Y-direction output voltage _VY (see FIGS. 5 and 6).

In step S4, the inspection device 7 determines whether the total number of wire breakages calculated in step S3 is equal to or greater than a specified value. If the total number of wire breaks is greater than or equal to the specified value, the process proceeds to step S5, and if the total number of wire breaks is less than the specified value, it is determined that there is no abnormality in the wire rope 3, and the rope inspection process ends. do. In the latter case, the operator terminal device 92 and the manager terminal device 93 display an output indicating that the wire rope 3 is normal.

In step S5, the inspection device 7 calculates the ratio of mountain breaks and the ratio of valley breaks to the total number of wire breaks calculated in step S3.

In step S5, the inspection device 7 confirms the sheave groove shape of the traction sheave 4 input by the operator or the like in step S1. If the sheave groove shape is a V groove, the process proceeds to step S7a, and if the sheave groove shape is a U groove, the process proceeds to step S7b.

In step 7a, the inspection device 7 determines whether the valley cut ratio is equal to or greater than a specified value. If the value is equal to or greater than the specified value, the process proceeds to step S8a, and if the value is less than the specified value, the process proceeds to step S9b.

Similarly, in step 7b, the inspection device 7 determines whether the mountain cut ratio is equal to or greater than a specified value. If the value is equal to or greater than the specified value, the process proceeds to step S8b, and if the value is less than the specified value, the process proceeds to step S9b.

In step 8a or step S8b, the inspection device 7 refers to the evaluation table T1 in FIG. 7A and the countermeasure table T2 in FIG. 7B to extract the presumed cause of wire breakage and countermeasures for each cause.

In step 9a, the inspection device 7 detects that an abnormally high rate of valley breaks occurs in the elevator using the V-groove traction sheave 4, although the normal wire breakage mode is mountain breaks. is output via the operator terminal device 92 and the administrator terminal device 93.

Similarly, in step 9c, the inspection device 7 detects an abnormally high rate of mountain breakage in the elevator using the U-groove traction sheave 4, although the normal wire breakage mode is valley breakage. The operator and the administrator are notified of this through the operator terminal device 92 and the administrator terminal device 93 .

Incidentally, in steps S9a and 9c, the presumed cause of wire breakage extracted in steps S8a and S8b and countermeasures for each cause are also output to the worker terminal device 92 and the manager terminal device 93. , even unskilled workers and managers can take appropriate measures.

On the other hand, in step 9b, the inspection device 7 confirms that ridge cuts or valley cuts, which are assumed to occur in accordance with the groove shape of the traction sheave 4, have occurred, and that normal deterioration over time has progressed. 92 or the administrator terminal device 93.

FIG. 9 exemplifies information displayed on the display screen 10 of the worker terminal device 92 and the manager terminal device 93 in steps S9a to S9c. In the area 10a, elevator specification information (groove shape of the traction sheave 4, etc.) input by the operator or manager is displayed. The region 10b displays the number of crest breaks, the number of valley breaks, and the total number of wire breaks calculated in step S3. Measurement data of the flaw detector 6 is displayed in the area 10c. The area 10d displays the presumed cause of wire breakage extracted from the countermeasure table T2. In the area 10e, countermeasures for each cause of wire breakage registered in the countermeasure table T2 are displayed.

According to the inspection system of the present embodiment described above, it is possible to determine the mode of abnormality of the wire rope of the machinery and equipment, and to propose maintenance measures according to the determination result.

1 car,
2 counterweights,
3 wire rope,
3a a fiber core,
3b strands,
4 traction sheaves,
5 deflector,
6 flaw detector,
6a, 6b magnetic sensors,
7 inspection equipment,
71 processing unit,
72 memory unit,
73 interface unit,
74 data input/output unit,
75 communications department,
8 judgment processing database,
9 network,
91 center device,
92 operator terminal device,
93 administrator terminal device,
10 Terminal screen

Claims (6)

An inspection system for inspecting a wire rope of an elevator,
a flaw detection device that measures the leakage magnetic flux in the radial direction and the longitudinal direction of the wire rope using a directional magnetic sensor;
Based on the combination of the magnitude of the leakage magnetic flux in the radial direction and the longitudinal direction measured by the flaw detection device, the breakage state of the wire constituting the wire rope is determined, and based on the combination of the breakage state and the groove shape of the traction sheave an inspection device that outputs countermeasures by
An inspection system comprising: In the inspection system according to claim 1,
The inspection device is
When the leakage magnetic flux in the longitudinal direction measured by the magnetic sensor is equal to or greater than a predetermined threshold,
If the radial leakage magnetic flux measured by the magnetic sensor is equal to or greater than a predetermined threshold value, the broken state of the wire is determined as a mountain break,
An inspection system for determining that the broken state of the wire is a valley break when the radial leakage magnetic flux measured by the magnetic sensor is less than a predetermined threshold value. In the inspection system according to claim 2,
The inspection device is
When the groove shape of the traction sheave is a V-groove, if the ratio of the number of trough-cut strands to the total number of strands that are broken is equal to or greater than a predetermined threshold, the broken state is determined to be the trough-cut mode, and is less than the predetermined threshold. If so, the broken state of the wire is determined as the mountain cut mode,
When the groove shape of the traction sheave is a U-groove, if the ratio of the number of broken strands to the number of broken strands of all strands is equal to or greater than a predetermined threshold value, the breaking state of the strands is determined to be the broken strand mode, An inspection system that determines that the broken state is the wire valley break mode if the value is less than a predetermined threshold. In the inspection system according to claim 3,
The inspection device is
When the groove shape of the traction sheave is a V-groove, the threshold value for life determination of the wire rope is decreased as the ratio of the number of valley-cut strands to the number of fractures of all strands is large,
When the groove shape of the traction sheave is a U-groove, the inspection system reduces the threshold value for determining the life of the wire rope as the ratio of the number of split strands to the number of broken strands of all strands increases. In the inspection system according to claim 3,
When the groove shape of the traction sheave is a V groove and the broken state of the wire is a valley cut mode, or when the groove shape of the traction sheave is a U groove and the wire is broken An inspection system that outputs the cause of wire breakage and countermeasures when the state is the mountain break mode. An inspection method for inspecting a wire rope of an elevator,
measuring the leakage magnetic flux in the radial direction and the longitudinal direction of the wire rope using a directional magnetic sensor;
a step of determining whether or not the wires forming the wire rope are broken based on the combination of the measured magnitudes of the leakage magnetic fluxes in the radial direction and the longitudinal direction;
a step of outputting a countermeasure based on the combination of the broken state and the groove shape of the traction sheave;
An inspection method comprising

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