JP6828130B1 - Rope inspection methods, rope inspection systems, and programs - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inspect the deterioration of a rope with high accuracy even when the surface of the rope is changed. SOLUTION: The rope inspection method of the embodiment is based on image data obtained by imaging a side surface of a rope for suspending a predetermined object, which is marked at predetermined intervals in the axial direction, and two adjacent ropes are inspected. The difference between the detection step for detecting the distance between the markings and the initial value of the distance and the predetermined interval is not included in the allowable threshold range set as the allowable range for the elongation of the rope, and If it is included in the false positive threshold range set as a range that can fluctuate due to the elongation of the rope, it is determined that there is an abnormality, and if the difference is not included in the false positive threshold range, the distance. Includes a determination step of determining that is a false positive and no abnormality. [Selection diagram] Fig. 1

Description

Embodiments of the present invention relate to rope inspection methods, rope inspection systems, and programs.

Conventionally, regarding the inspection of equipment, there has been known a technique of inspecting an inspection target by using image data obtained by imaging the inspection target instead of directly visually observing the inspection target. Inspection targets include, for example, ropes used in elevators, cranes, bridges, and the like.

For example, the main rope of an elevator deteriorates due to the operation of the elevator, so inspections to confirm the soundness of the main rope are carried out regularly. As a method of inspecting the main rope, for example, there is a method of inspecting the main rope by taking an image of the main rope in a state where the main rope is hung on the elevator device.

Specifically, for example, first, the distance between two adjacent markings is detected based on the image data obtained by imaging the side surfaces of the rope that are marked at predetermined intervals in the axial direction. Then, when the difference between the distance and the initial value of the predetermined interval is not included in the permissible threshold range set as the permissible range for the elongation of the rope, it is determined that the rope is abnormal.

Japanese Unexamined Patent Publication No. 2018-20497 JP-A-2009-143678

However, in the case of the above-mentioned conventional technique, for example, if there is a change on the surface of the rope due to adhesion of foreign matter (dust, dust, etc.) or discoloration, the changed surface may be erroneously detected as marking. In that case, even if there is no abnormality in the rope, the above difference is not included in the allowable threshold range, and it may be erroneously determined that the rope is abnormal.

Therefore, in the following embodiments, it is an object of the present invention to provide a rope inspection method, a rope inspection system, and a program capable of inspecting the deterioration of the rope with high accuracy even if the surface of the rope is changed.

The rope inspection method of the embodiment is based on image data obtained by imaging a side surface of a rope for suspending a predetermined object, which is marked at predetermined intervals in the axial direction, between two adjacent markings. The difference between the detection step for detecting the distance and the initial value of the predetermined interval is not included in the permissible threshold range set as the permissible range for the elongation of the rope, and the rope If it is included in the false positive threshold range set as a range that can fluctuate due to elongation, it is determined that there is an abnormality, and if the difference is not included in the false positive threshold range, the distance is false positive. It includes a determination step of determining that there is no abnormality.

FIG. 1 is a block diagram showing an outline of the overall configuration of the elevator system of the first embodiment. FIG. 2 is a diagram showing an example of a resin-coated rope of the elevator of the first embodiment. FIG. 3 is a diagram showing an example of a case where the surface of the resin-coated rope is changed in the first embodiment. FIG. 4 is a flowchart showing the operation in the elevator system of the first embodiment. FIG. 5 is a block diagram showing an outline of the overall configuration of the elevator system of the second embodiment. FIG. 6 is a flowchart showing the operation in the elevator system of the second embodiment. FIG. 7 is a block diagram showing an outline of the overall configuration of the elevator system of the third embodiment. FIG. 8 is a flowchart showing the operation in the elevator system of the third embodiment.

Hereinafter, the rope inspection method, the rope inspection system, and the program of the embodiments (first embodiment to the third embodiment) will be described with reference to the attached drawings.

In order to help the understanding of the embodiment, first, the problems of the prior art when diagnosing (inspecting) the resin-coated rope of the elevator will be described. As one of the types of main ropes used for elevators, there is a resin-coated rope. In addition, such a resin-coated rope may be diagnosed at a remote monitoring center (hereinafter, also referred to as remote diagnosis).

In that case, the distance between two adjacent markings is detected based on the image data obtained by imaging the side surfaces of the resin-coated rope in which markings are made at predetermined intervals in the axial direction. Then, when the difference between the distance and the initial value of the predetermined interval is not included in the permissible threshold range set as the permissible range for the elongation of the rope, it is determined that the rope is abnormal.

Further, in the above-mentioned Patent Document 1 (Japanese Unexamined Patent Publication No. 2018-204977), if a portion where marking cannot be detected occurs, the elongation of the resin-coated rope is calculated from the interval between the markings detected before and after the portion. To do. Then, the presence or absence of an abnormality in the rope can be determined, and if there is an abnormality, the abnormal portion can be detected.

Further, in Patent Document 2 (Japanese Unexamined Patent Publication No. 2009-143678) described above, parts capable of confirming electrical continuity are installed inside the resin-coated rope at regular intervals. Then, it is possible to recognize an abnormality such as damage to the exterior coating of the resin-coated rope or breakage of the wire depending on the presence or absence of electrical continuity between the parts.

However, in the case of the above two conventional techniques, for example, if there is a change on the surface of the resin-coated rope due to adhesion of foreign matter (dust, dust, etc.) or discoloration, the changed surface may be erroneously detected as marking. There is. In that case, even if there is no abnormality in the resin-coated rope, the above difference is not included in the allowable threshold range, and it may be erroneously determined that the resin-coated rope is abnormal. If it is erroneously determined that the resin-coated rope is abnormal, it will lead to an increase in the man-hours required for maintenance personnel.

Therefore, in the following embodiments, a technique capable of inspecting the deterioration of the resin-coated rope with high accuracy even when the surface of the resin-coated rope is changed will be described.

(First Embodiment)
The overall configuration of the elevator system S (rope inspection system) of the first embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing an outline of the overall configuration of the elevator system S of the first embodiment.

The elevator system S includes an elevator 1, an elevator control device 5, a rope diagnostic device 13, a remote monitoring center 16, and a maintenance staff tool 22.

The elevator 1 includes a hoisting machine 2, a resin-coated rope 3, and an elevator car 4. The hoisting machine 2 raises and lowers the elevator car 4 by, for example, hoisting a resin-coated rope 3 which is a main rope connecting the elevator car 4 and a counterweight (not shown).

Next, the resin-coated rope 3 will be described with reference to FIG. FIG. 2 is a diagram showing an example of the resin-coated rope 3 of the elevator 1 of the first embodiment. 2A and 2B show a cross-sectional view of the resin-coated rope 3 according to the present embodiment, and FIG. 2B shows a side view of the resin-coated rope 3. As shown in FIG. 2, in the resin-coated rope 3, a plurality of strands 3a obtained by twisting a plurality of strands made of, for example, carbon steel or stainless steel are twisted around a core steel 3b at a predetermined pitch. The wire rope 3A composed of the above has a structure in which the outer periphery is covered with a resin cover layer 3B.

Markings 51 that can be visually recognized from the outside are provided on the outer peripheral surface of the cover layer 3B at predetermined intervals L. Therefore, by actually measuring the predetermined interval L between the markings 51, it is possible to specify how much the resin-coated rope 3 between the markings 51 is stretched. Therefore, in the present embodiment, the degree of deterioration of the resin-coated rope 3 is estimated and evaluated from the specified degree of elongation. The estimation / evaluation results obtained thereby can be used, for example, when determining the timing of maintenance or replacement of the resin-coated rope 3.

The inspection target of the embodiment is not limited to the resin-coated rope 3 illustrated in FIG. 2, and may be another rope such as a wire rope having an exposed metal surface. Even in the case of such other ropes, it is assumed that markings that can be visually recognized from the outside are provided at predetermined intervals on the outer peripheral surface of the rope.

Returning to FIG. 1, the elevator car 4 is a box-shaped structure for users to get on and off.

The elevator control device 5 includes a landing information detection unit 6, a vehicle information detection unit 7, a vehicle operation control unit 8, a remote diagnosis command unit 9, a clock 10, a remote diagnosis operation execution determination unit 11, and a remote unit. A diagnosis result transmission unit 12 is provided.

The landing information detection unit 6 detects that there is a landing call (landing information), and transmits the detected landing information to the remote diagnosis operation execution determination unit 11.

The car information detection unit 7 detects that the floor button or door open / close button in the elevator car 4 is pressed (car information), and transmits the detected car information to the remote diagnosis operation execution determination unit 11. ..

The car operation control unit 8 controls the door opening / closing and up / down operation of the elevator car 4.

The remote diagnosis command unit 9 uses the time signal from the clock 10 to output a remote diagnosis operation command such as a rope elongation diagnosis of the resin-coated rope 3 and an elevator rated speed when the timing of the remote diagnosis operation comes.

When the remote diagnosis operation execution determination unit 11 receives the remote diagnosis command from the remote diagnosis command unit 9, the remote diagnosis operation is remote when there is no landing call and the floor button or door open / close button in the elevator car 4 is not pressed. Determine to carry out the diagnosis.

The remote diagnosis result transmission unit 12 receives the elongation measurement result of the resin-coated rope 3 from the rope elongation measurement unit 14, and also receives the state determination result of the resin-coated rope 3 from the rope condition determination unit 15, and includes them. The diagnosis result of the remote diagnosis operation is transmitted to the remote monitoring center 16.

The rope diagnostic device 13 includes a rope elongation measuring unit 14 and a rope state determining unit 15. The rope elongation measuring unit 14 acquires image data obtained by imaging the side surfaces of the resin-coated rope 3 marked at predetermined intervals in the axial direction from an imaging unit (not shown). The imaging unit is an imaging device capable of acquiring a still image or a moving image such as a CCD (Charge-Coupled Device) camera, and outputs image data obtained by imaging the resin-coated rope 3.

Further, the rope elongation measuring unit 14 includes a function of a detecting unit that detects the marking position of the resin-coated rope 3 based on the image data and detects the distance between two adjacent markings. Further, the rope elongation measuring unit 14 measures the elongation of the resin-coated rope 3 based on the distance between the markings.

The rope state determination unit 15 determines whether or not there is an abnormality in the rope elongation of the resin-coated rope 3 and a location where the rope elongation is abnormal from the measurement results of the rope elongation measurement unit 14. For example, when the difference between the distance between markings and the initial value of the predetermined interval L (FIG. 2) is not included in the allowable threshold range set as the allowable range for rope elongation, the rope state determination unit 15 is used. Judged as abnormal rope elongation.

Further, the remote monitoring center 16 includes, for example, a computer system built in an elevator management company. The remote monitoring center 16 analyzes the inspection result and displays the analysis result and the like to the operator based on various data sent from the elevator control device 5. The remote monitoring center 16 includes a center remote diagnosis command unit 17, a remote diagnosis result receiving unit 18, an initial value storage unit 19, a determination unit 20, and a rope elongation abnormality location display unit 21.

The center remote diagnosis command unit 17 transmits a remote diagnosis command to the elevator control device 5.

The remote diagnosis result receiving unit 18 receives the remote diagnosis result including each marking position of the resin-coated rope 3 and the distance between markings from the remote diagnosis result transmitting unit 12 of the elevator control device 5.

The initial value storage unit 19 stores each marking position of the resin-coated rope 3 acquired by the remote diagnosis result receiving unit 18, an initial value of the distance between markings, and the like.

The determination unit 20 does not include the difference between the marking distance and the initial value of the predetermined interval L (FIG. 2) in the allowable threshold range set as the allowable range for rope elongation, and the rope elongation If it is included in the false positive threshold range set as the range that can fluctuate by, it is determined that there is an abnormality. Further, when there is an abnormality, the determination unit 20 also determines where the abnormal portion is on the resin-coated rope 3. Further, when the difference is not included in the false detection threshold range, the determination unit 20 determines that the distance between markings is false detection and there is no abnormality. These will be described in detail below.

If there is a change on the surface of the resin-coated rope 3 due to adhesion of foreign matter (dust, dust, etc.) or discoloration, the changed surface may be erroneously detected as marking. In that case, even if the resin-coated rope 3 does not actually have an abnormality in elongation, the above difference is not included in the allowable threshold range, and it may be erroneously determined that the rope is abnormal.

Here, FIG. 3 is a diagram showing an example of a case where the surface of the resin-coated rope 3 is changed in the first embodiment. Here, based on the above-mentioned allowable threshold range and false detection threshold range, the rope elongation as a section in which the marking 51 may be detected when the resin-coated rope 3 is elongated in the axial direction of the resin-coated rope 3. A detection section A and a rope stretch detection section B as a section in which the marking 51 is unlikely to be detected when the resin-coated rope 3 is stretched are provided.

That is, when marking is detected in the rope elongation detection section B of the resin-coated rope 3, what is actually detected is not the marking, but foreign matter such as dust and dirt adhering to the surface of the resin-coated rope 3. It is D.

Therefore, when the distance between markings is not included in the allowable threshold range and the marking is detected in the rope elongation detection section A, it is appropriate to determine that there is an abnormality in rope elongation.

On the other hand, even if the distance between markings is not included in the allowable threshold range, if the marking is detected in the rope elongation detection section B, the cause is foreign matter D or the like adhering to the surface of the resin-coated rope 3. Therefore, it is appropriate to judge that there is no abnormality in rope elongation. Therefore, in that case, the maintenance personnel and the like are not notified of the abnormality in the rope elongation. The method for determining the abnormality in rope elongation shown in FIG. 3 is an example, and the method is not limited thereto.

Returning to FIG. 1, the rope elongation abnormality display unit 21 displays the rope elongation abnormality and the abnormality portion when the determination unit 20 determines that the rope elongation abnormality is appropriate. Further, in that case, the rope elongation abnormality location display unit 21 transmits information on the rope elongation abnormality and the abnormality portion to the rope abnormality notification unit 23.

The maintenance worker tool 22 is a communication terminal such as a smartphone, and includes a rope abnormality notification unit 23. The rope abnormality notification unit 23 notifies the maintenance staff of the rope elongation abnormality and the abnormal portion thereof by display or voice regarding the rope elongation abnormality determined to be appropriate by the determination unit 20 of the remote monitoring center 16.

Next, the operation in the elevator system S of the first embodiment will be described with reference to FIG. FIG. 4 is a flowchart showing the operation in the elevator system S of the first embodiment.

First, in step S1-1, when the elevator 1 starts normal traveling, the first remote diagnostic operation is performed in the elevator system S, and the elevator 1 operates UP or DOWN to perform the marking positions of the resin-coated rope 3. The initial value storage unit 19 stores the initial value of the distance between markings.

Next, the elevator 1 continues to run normally, and in step S1-2, the remote diagnosis command unit 9 uses, for example, the time signal from the clock 10, and when the timing of the remote diagnosis operation comes, the resin-coated rope 3 Outputs remote diagnosis operation commands such as rope elongation diagnosis and elevator rated speed. In step S1-2, the remote diagnosis command unit 9 may output the remote diagnosis operation command based on the request for the remote diagnosis operation from the center remote diagnosis command unit 17.

Then, when the remote diagnosis operation execution determination unit 11 determines that the remote diagnosis is to be performed without calling the landing area and without pressing the floor button or the door open / close button in the elevator car 4, the elevator 1 is roped. Start diagnostic operation.

In the rope diagnosis operation, the elevator car 4 is driven in the vertical direction by the car operation control unit 8, the rope elongation measurement unit 14 detects the marking position of the resin-coated rope 3, and the distance between two adjacent markings. Is detected, and the elongation of the resin-coated rope 3 is measured based on the distance between the markings.

Further, the rope state determination unit 15 determines whether or not there is an abnormality in the rope elongation of the resin-coated rope 3 and a location where the rope elongation is abnormal from the measurement results of the rope elongation measuring unit 14.

Next, in step S1-3, the remote diagnosis result transmission unit 12 transmits the remote diagnosis operation result including each marking position of the resin-coated rope 3, the rope elongation calculation result, the rope abnormality determination result, the elevator rated speed measurement result, and the like. It is transmitted to the remote diagnosis result receiving unit 18 of the remote monitoring center 16.

Next, in step S1-4, the determination unit 20 determines whether or not the calculated value of the rope elongation is abnormal, that is, the difference between the marking distance and the initial value of the predetermined interval L (FIG. 2) is the above-mentioned allowable threshold range. It is determined whether or not it is included in, and if Yes, the process proceeds to step S1-5, and if No, the process ends.

In step S1-5, the determination unit 20 determines whether or not there is an erroneous determination in the rope elongation abnormality, that is, whether or not the above difference is included in the erroneous detection threshold range, and in the case of Yes, step. The process proceeds to S1-8, and if No, the process proceeds to step S1-6.

In step S1-8, the determination unit 20 determines that the rope elongation is normal without any abnormality as a diagnosis result.

In the case of after No in step S1-4 and after step S1-8, the rope elongation abnormality location display unit 21 does not notify the rope abnormality notification unit 23 of the maintenance staff tool 22 of anything.

In step S1-6, the determination unit 20 determines that the rope elongation is abnormal, and proceeds to step S1-7.

In step S1-7, the rope elongation abnormality location display unit 21 transmits information on the rope elongation abnormality and the abnormality portion to the rope abnormality notification unit 23 of the maintenance staff tool 22. The rope abnormality notification unit 23 notifies the maintenance staff of the rope elongation abnormality and the abnormal portion by display or voice.

As described above, according to the elevator system S (rope inspection system) of the first embodiment, the difference between the marking distance and the initial value of the predetermined interval is not included in the allowable threshold range for the resin-coated rope 3. However, if it is not included in the false positive threshold range, it is determined that there is no abnormality. In that case, it is considered that the elongation of the resin-coated rope 3 is not abnormal, but that the surface of the resin-coated rope 3 is changed due to the adhesion of foreign matter or the like.

Therefore, even if the surface of the resin-coated rope 3 is changed due to adhesion of foreign matter or the like, the deterioration of the rope can be inspected with high accuracy. Therefore, it is possible to avoid an increase in man-hours for maintenance personnel due to an erroneous determination of an abnormality in the resin-coated rope 3.

(Second Embodiment)
Next, the second embodiment will be described. Descriptions of the same items as in the first embodiment will be omitted as appropriate. FIG. 5 is a block diagram showing an outline of the overall configuration of the elevator system S of the second embodiment. FIG. 5 is different from FIG. 1 in that the elevator stop command unit 25 is added to the elevator control device 5 and the center side elevator stop command unit 24 is added to the remote monitoring center 16.

When the determination unit 20 determines that there is a rope abnormality, the center-side elevator stop command unit 24 commands the elevator stop command unit 25 to stop the elevator 1. The elevator stop command unit 25 commands the car operation control unit 8 to stop the elevator 1 based on the stop command from the center-side elevator stop command unit 24.

FIG. 6 is a flowchart showing the operation in the elevator system S of the second embodiment. Steps S2-1 to S2-8 in FIG. 6 are the same as steps S1-1 to S1-8 in FIG.

After step S2-7, in step S2-9, the elevator stop command unit 24 on the center side commands the car operation control unit 8 to stop the elevator 1 via the elevator stop command unit 25, and the elevator 1 is operated. The control unit 8 stops the elevator 1.

As described above, according to the elevator system S of the second embodiment, when it is determined that the abnormality of the rope elongation of the resin-coated rope 3 is appropriate, the elevator 1 is stopped to further improve the safety of the elevator user. Can be improved. Further, it is possible to avoid stopping the elevator 1 due to an erroneous determination of an abnormality of the resin-coated rope 3.

(Third Embodiment)
Next, the third embodiment will be described. Descriptions of the same items as in the second embodiment will be omitted as appropriate. FIG. 7 is a block diagram showing an outline of the overall configuration of the elevator system of the third embodiment. In FIG. 7, as compared with FIG. 5, an erroneous detection position / number of times storage unit 26, an erroneous detection abnormality transmission unit 27, and an erroneous detection position / number of times display unit 29 are added to the remote monitoring center 16, and the maintenance staff tool 22 is erroneously added. The difference is that the detection abnormality notification unit 28 is added.

The false detection position / number storage unit 26 stores the number of times that the determination unit 20 determines that the above difference is not included in the false detection threshold range for the same position of the rope. Then, the erroneous detection position / number storage unit 26 determines that the erroneous detection does not disappear when the erroneous determination number (false detection number) exceeds a certain number, and the erroneous detection abnormality transmission unit 27 and the erroneous detection position / number display unit An abnormality is output to 29 to notify the abnormality that the false detection does not disappear.

When the erroneous detection abnormality transmitting unit 27 receives an abnormal output from the erroneous detection position / number of times storage unit 26, the erroneous detection is not resolved and the position on the resin-coated rope 3 is displayed on the display unit of the maintenance staff tool 22. Includes a functional part as a part. That is, in that case, the false detection abnormality transmitting unit 27 transmits to the false detection abnormality notification unit 28 information on the abnormality in which the false detection does not disappear and the position where the false detection does not disappear.

When the erroneous detection position / number of times display unit 29 receives an abnormality output from the erroneous detection position / number of times storage unit 26, the erroneous detection position / number of times display unit 29 displays an abnormality in which the erroneous detection does not disappear. Specifically, the erroneous detection position / number display unit 29 displays the erroneous detection position and the erroneous detection number at that position.

When the false detection abnormality notification unit 28 receives information on an abnormality in which the false detection does not disappear and a position in which the false detection does not disappear from the false detection abnormality transmission unit 27, the false detection does not disappear and the false detection does not disappear. The maintenance staff is notified by display or voice of the instruction to confirm.

Next, the operation in the elevator system S of the third embodiment will be described with reference to FIG. FIG. 8 is a flowchart showing the operation in the elevator system S of the third embodiment. Steps S3-1 to S3-9 in FIG. 8 are the same as steps S2-1 to S2-9 in FIG.

After Yes in step S3-5, in step S3-10, the false detection position / number storage unit 26 determines whether or not the number of false determinations of the rope elongation abnormality is less than or equal to a certain number, and in the case of Yes, The process proceeds to step S3-8, and if No, the process proceeds to step S3-11.

In step S3-11, the erroneous detection position / number of times storage unit 26 determines that there is a position where the erroneous determination does not disappear (the number of erroneous determinations exceeds a certain number of times) as an abnormality.

Next, in step S3-12, the erroneous detection position / number of times display unit 29 displays the erroneous detection position and the number of erroneous detections at that position.

Next, in step S3-13, when the false detection abnormality notification unit 28 receives from the false detection abnormality transmission unit 27 information on an abnormality in which the false detection does not disappear and a position where the false detection does not disappear, the false detection does not disappear. Notify maintenance personnel by display or voice of the position where the abnormality and its false detection do not disappear and the instruction to confirm.

As described above, according to the elevator system S of the third embodiment, when the false detection of the rope elongation abnormality of the resin-coated rope 3 is detected more than a certain number of times, the false detection abnormality is output to the maintenance staff tool 22. As a result, the maintenance staff can recognize, for example, the necessity of cleaning the foreign matter adhering to the resin-coated rope 3, and can take appropriate measures.

The rope inspection program executed by the elevator system S (rope inspection system) of the present embodiment has a module configuration including each of the above-mentioned functional units (each software functional unit such as the rope elongation measuring unit 14), and is actually used. As hardware, the CPU (processor) reads the rope inspection program from the storage medium and executes it so that each of the above functional units is loaded on the main storage device and each functional unit is generated on the main storage device. It has become.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

For example, the inspection target of the present invention is not limited to the rope used for the elevator, and may be another rope such as a rope used for a crane, a bridge, or the like.

1 ... elevator, 2 ... hoisting machine, 3 ... resin-coated rope, 4 ... elevator car, 5 ... elevator control device, 6 ... landing information detection unit, 7 ... car information detection unit, 8 ... car operation control unit, 9 ... remote diagnosis command unit, 10 ... clock, 11 ... remote diagnosis operation execution judgment unit, 12 ... remote diagnosis result transmission unit, 13 ... rope diagnostic device, 14 ... rope elongation measurement unit, 15 ... rope condition judgment unit, 16 ... Remote monitoring center, 17 ... Center remote diagnosis command unit, 18 ... Remote diagnosis result receiving unit, 19 ... Initial value storage unit, 20 ... Judgment unit, 21 ... Rope stretch abnormality display unit, 22 ... Maintenance staff tool, 23 ... Rope Abnormality notification unit, 24 ... Center side elevator stop command unit, 25 ... Elevator stop command unit, 26 ... False detection position / number storage unit, 27 ... False detection abnormality transmission unit, 28 ... False detection abnormality notification unit, 29 ... False detection Position / number display

Claims (5)

A detection step for detecting the distance between two adjacent markings based on image data obtained by imaging a side surface of a rope for suspending a predetermined object at predetermined intervals in the axial direction. ,
The difference between the distance and the initial value of the predetermined interval is set as a range that is not included in the allowable threshold range set as the allowable range for the elongation of the rope and can be changed by the elongation of the rope. If it is included in the false positive threshold range, it is judged that there is an abnormality, and it is judged that there is an abnormality.
A rope inspection method including a determination step of determining that the distance is false detection and no abnormality when the difference is not included in the false detection threshold range. The rope inspection method according to claim 1, further comprising a stop command step for instructing the use of the rope to be stopped when it is determined that there is an abnormality by the determination step. A number measurement step for measuring the number of times the difference is determined not to be included in the false detection threshold range for the same position of the rope by the determination step.
The rope inspection method according to claim 1, further comprising: when the number of times reaches a predetermined number of times, the false detection of the distance is not resolved and an output step of outputting information on the position of the rope. A detection unit that detects the distance between two adjacent markings based on image data obtained by imaging the side surfaces of a rope that suspends a predetermined object and is marked at predetermined intervals in the axial direction. ,
The difference between the distance and the initial value of the predetermined interval is set as a range that is not included in the allowable threshold range set as the allowable range for the elongation of the rope and can be changed by the elongation of the rope. If it is included in the false positive threshold range, it is judged that there is an abnormality, and it is judged that there is an abnormality.
When the difference is not included in the false detection threshold range, the determination unit for determining that the distance is false detection and no abnormality,
Rope inspection system equipped with. A detection step for detecting the distance between two adjacent markings based on image data obtained by imaging a side surface of a rope for suspending a predetermined object at predetermined intervals in the axial direction. ,
The difference between the distance and the initial value of the predetermined interval is set as a range that is not included in the allowable threshold range set as the allowable range for the elongation of the rope and can be changed by the elongation of the rope. If it is included in the false positive threshold range, it is judged that there is an abnormality, and it is judged that there is an abnormality.
A program for causing a computer to execute a determination step of determining that the distance is false detection and no abnormality when the difference is not included in the false detection threshold range.

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