JP6982143B1 - Rope inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve inspection accuracy of a rope. SOLUTION: The rope inspection apparatus of the embodiment is based on an acquisition unit that acquires image data of images of side surfaces of a rope that suspends a predetermined object and is marked at predetermined intervals in the axial direction, and an image data. , A calculation unit that executes a calculation process for calculating the elongation amount of the distance between two adjacent markings, and a determination unit that executes a determination process for determining whether or not the elongation amount is equal to or greater than a predetermined elongation amount threshold. , A luminance changing unit for changing the luminance with respect to the image data is provided. When the determination unit determines that the elongation amount is equal to or greater than the predetermined elongation threshold value, the brightness change unit changes the brightness of the image data, and the calculation process is determined by the calculation unit based on the image data after the brightness change. A series of processes of performing a determination process by the unit are repeated, and the determination unit determines that the abnormality is abnormal when it is determined that the elongation amount is equal to or more than the predetermined elongation amount threshold value continuously for a predetermined number of times or more. [Selection diagram] Fig. 1

Description

Embodiments of the present invention relate to a rope inspection device.

As a method for inspecting deterioration of ropes (for example, ropes used for elevators, cranes, bridges, etc.) that suspend a predetermined object, in recent years, instead of conventional visual inspection, inspection technology based on image data obtained by imaging the rope. Research and development is underway. This inspection technique uses, for example, a rope whose sides are marked at predetermined intervals in the axial direction, and the distance between two adjacent markings based on image data obtained by imaging the sides of the rope. The amount of elongation is calculated, and when the amount of elongation is equal to or greater than a predetermined threshold value, it is determined to be abnormal.

Japanese Patent No. 6239304 Japanese Unexamined Patent Publication No. 2008-0563885

However, in the case of the above-mentioned conventional technique, even if the rope is not actually deteriorated, for example, the marking may be deteriorated, or the image data may be unclear due to the rope's imaging environment being too dark or too bright. There is a problem that the marking failure may occur due to the above, and the deterioration of the rope may be erroneously detected.

Therefore, an object of the embodiment of the present invention is to provide a rope inspection device capable of improving the inspection accuracy of the rope.

The rope inspection device of the embodiment is adjacent to an acquisition unit that acquires image data of images of side surfaces of a rope that suspends a predetermined object and is marked at predetermined intervals in the axial direction, based on the image data. A calculation unit that executes a calculation process for calculating the elongation amount of the distance between the two markings, a determination unit that executes a determination process for determining whether or not the elongation amount is equal to or greater than a predetermined elongation amount threshold, and a determination unit. A brightness changing unit for changing the brightness of the image data is provided. When the determination unit determines that the elongation amount is equal to or greater than the predetermined elongation threshold value, the brightness changing unit changes the brightness of the image data, and the calculation is based on the image data after the brightness change. A series of processes of performing the calculation process by the unit and the determination process by the determination unit were repeated, and the determination unit determined that the elongation amount was equal to or more than the predetermined elongation amount threshold value continuously for a predetermined number of times or more. Sometimes it is judged to be abnormal.

FIG. 1 is a block diagram showing a schematic configuration example of the rope inspection system of the embodiment. FIG. 2 is a diagram showing an example of the main rope of the present embodiment. FIG. 3 is a diagram showing an example of image data periodically acquired by the imaging unit in the present embodiment. FIG. 4 is a block diagram showing a more detailed configuration example of the information storage unit and the information processing unit of the present embodiment. FIG. 5 is a flowchart showing an example of the rope inspection process of the present embodiment.

Hereinafter, the rope inspection apparatus of the illustrated embodiment will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a schematic configuration example of the rope inspection system 1 of the embodiment. As shown in FIG. 1, the rope inspection system 1 includes, for example, a rope inspection device 30 and a monitoring center 40 (external device), and is installed in the elevator device 20. The elevator device 20 may be included in the rope inspection system 1.

The elevator device 20 exemplified in this embodiment is a so-called slip-type elevator in which a car 21 on which a user gets on and off and a counterweight 22 are connected by a main rope 23 (an example of a rope for suspending a predetermined object). .. The elevator device 20 controls the hoisting machine 26 to move the car 21 up and down along the hoistway provided in the building to move the user to the elevator hall on the destination floor.

Here, an example of the main rope 23 of the present embodiment will be described in detail with reference to FIG. 2A and 2B show a cross-sectional view of the main rope 23 of the present embodiment, and FIG. 2B shows a side view of the main rope 23. As shown in FIG. 2, the main rope 23 is, for example, a resin-coated rope having a structure in which the outer periphery of the wire rope 23A is covered with a resin cover layer 23B. Further, the wire rope 23A is configured by twisting a plurality of strands 23a made by twisting a plurality of strands made of carbon steel, stainless steel or the like around a core steel 23b at a predetermined pitch.

Markings 51 that can be visually recognized from the outside are provided on the outer peripheral surface of the cover layer 23B at predetermined intervals L. Therefore, by measuring the distance L between the markings 51, it is possible to specify how much the main rope 23 between the markings 51 is extended.

Therefore, in the present embodiment, the degree of deterioration of the main rope 23 is estimated and evaluated from the specified degree of extension. The estimation / evaluation results obtained in this way can be used, for example, when determining the timing of maintenance or replacement of the main rope 23. Further, the point of reducing the possibility of erroneous detection of deterioration of the main rope 23 due to the deterioration of the marking 51 and the detection failure of the marking 51 due to the imaging environment of the main rope 23 (too dark or too bright) will be described in detail. ..

The main rope 23 of the present embodiment is not limited to the resin-coated rope exemplified in FIG. 2, and has strength and the like that can be used as the main rope 23 of the elevator device 20 such as a wire rope having an exposed metal surface. Various ropes can be used. However, even when such a rope is used, it is assumed that markings 51 that can be visually recognized from the outside are provided on the outer peripheral surface of the rope at predetermined intervals L.

Returning to FIG. 1, the hoisting machine 26 raises and lowers the car 21 by hoisting the main rope 23 connecting the car 21 and the counterweight 22. The hoisting machine 26 has a motor 24 that is a power source for hoisting the main rope 23, and a pulse generator 25 that detects the rotation speed of the motor 24. The motor 24 is connected to the elevator operation control unit 27 via the pulse generator 25. While the elevator device 20 is in operation, the pulse generator 25 detects, for example, a pulse value indicating the rotation speed of the motor 24 at a specific cycle, and outputs the detected pulse value as a pulse signal to the elevator operation control unit 27.

The pulse value indicating the rotation speed of the motor 24 is information that can be converted into the ascending / descending speed of the car 21. Further, the elevator operation control unit 27 is provided with a counter circuit (not shown) that counts a pulse value input as a pulse signal. This counter circuit counts down, for example, when the pulse value when the car 21 is lowered is input, and counts up when the pulse value when the car 21 is raised is input. Therefore, it is possible to specify the position of the car 21 (and the position of the main rope 23) on the hoistway based on the count value of the counter circuit.

Therefore, the elevator operation control unit 27 controls the pulse value given to the motor 24 from the pulse generator 25 based on the count value of the counter circuit to execute an ascending / descending operation for moving the car 21 to a target position.

Specifically, the elevator operation control unit 27 specifies the current position of the car 21 based on the count value of the counter circuit when controlling the ascending / descending operation of the car 21, and the pulse acquired from the pulse generator 25. The ascending / descending speed of the car 21 is specified based on the signal. Further, the elevator operation control unit 27 is based on a signal generated by the user operating a call button installed in the elevator hall on each floor or a destination floor button installed in the car 21 to drive the car 21. The pulse generator 25 is controlled to generate a pulse signal for raising and lowering the. Then, the elevator operation control unit 27 inputs the generated pulse signal to the motor 24 to control the motor 24, thereby controlling the ascending / descending operation of the car 21 to move the user to the elevator hall on the target floor.

The elevator operation control unit 27 controls not only the raising and lowering operation of the car 21 but also the opening and closing operation of the door provided in the car 21.

Further, the elevator operation control unit 27 outputs a pulse signal indicating the count value of the counter circuit to the information collection control unit 33 of the rope inspection device 30, which will be described later, at an appropriate or predetermined cycle. As described above, the pulse value of the pulse signal indicating the count value of the counter circuit indicates the position of the car 21 on the hoistway. Therefore, in the following description, the pulse value of the pulse signal indicating the count value of the counter circuit output from the elevator operation control unit 27 is referred to as a car position pulse value.

On the other hand, as shown in FIG. 1, the rope inspection device 30 includes, for example, an image pickup unit 32, an image pickup control unit 31, an activation unit 37, an information collection control unit 33, an information storage unit 34 (storage unit), and the like. It includes an information processing unit 35 and a remote terminal 36.

The image pickup unit 32 is an image pickup device capable of acquiring at least a still image, such as a CCD (Charge-Coupled Device) camera, and outputs image data obtained by taking an image of the main rope 23. The image pickup unit 32 may capture a moving image.

The optical system and installation position of the image pickup unit 32 are such that the main rope 23 at the portion where the hoisting machine 26 and the car 21 are pulled substantially linearly is oriented in the extending direction (that is, vertical (vertical)) of the main rope 23. ) Direction) is adjusted so that images can be taken with a certain angle of view.

The installation position of the image pickup unit 32 may be, for example, the machine room where the hoisting machine 26 is installed. Since the car 21 does not enter the machine room, the image pickup unit 32 can be arranged close to the main rope 23, and clearer image data of the main rope 23 can be acquired. However, the installation position of the image pickup unit 32 is not limited to this, and may be appropriately changed as long as it is a position where it is possible to image a portion of the main rope 23 that needs to be inspected (hereinafter referred to as an inspection target range). Is possible.

The image pickup control unit 31 is a control device for causing the image pickup unit 32 to perform an image pickup operation or a periodic image pickup operation at an arbitrary timing. The activation unit 37 is, for example, an operation unit for the operator of the rope inspection device 30 to directly or remotely input an instruction to start imaging to the imaging control unit 31.

The information collection control unit 33 inputs the image data output from the image pickup unit 32 and the pulse signal output from the elevator operation control unit 27, and needs the input image data and the car position pulse value indicated by the pulse signal. Is input to the information storage unit 34 according to the above.

The information storage unit 34 is a storage area composed of, for example, a database or a file server. The information storage unit 34 stores the image data input from the information collection control unit 33, the car position pulse value indicated by the pulse signal, and the like.

The information processing unit 35 is composed of, for example, an information processing device such as a CPU (Central Processing Unit). The information processing unit 35 generates necessary data by executing analysis and arithmetic processing on various data stored in the information storage unit 34, and stores the generated data in the information storage unit 34.

The remote terminal 36 is an information terminal having a communication function such as a PHS (Personal Handyphone System) or a tablet terminal. The remote terminal 36 acquires and displays various data stored in the information storage unit 34, transfers the acquired data, and the like.

Further, the monitoring center 40 is, for example, a computer system built in an elevator management company. The monitoring center 40, for example, analyzes inspection results and displays analysis results to the operator based on various data sent from the remote terminal 36 via the network 41. It is possible to apply various networks such as WAN (Wide Area Network), LAN (Local Area Network), public line, and dedicated line such as the Internet and mobile communication network to the network 41.

In the above configuration, when performing an inspection, first, an image of at least the inspection target range on the main rope 23 is acquired. Here, the inspection target range is, for example, when the car 21 on the main rope 23 is moved from a first predetermined position (for example, the uppermost position) to a second predetermined position (for example, the lowest position). It is a part that passes through the image pickup region of the image pickup unit 32, and is mainly a part that directly receives the load at the time of raising and lowering by coming into contact with the hoisting machine 26 when raising and lowering the car 21.

When acquiring the image of the inspection target range, the operator first moves the car 21 to the first predetermined position by giving an instruction to the elevator operation control unit 27. Subsequently, the operator inputs an instruction to start imaging using the activation unit 37. Then, the image pickup control unit 31 to which the instruction is input from the start-up unit 37 controls the image pickup unit 32 so as to image the main rope 23 at a predetermined cycle. As a result, periodic image data acquisition by the image pickup unit 32 is started, and the acquired image data is sequentially input to the information collection control unit 33. Note that a pulse signal indicating a count value (car position pulse value) of the counter circuit is constantly input from the elevator operation control unit 27 to the information collection control unit 33 while the elevator device 20 is in operation.

Next, the operator gives an instruction to the elevator operation control unit 27 to move the car 21 from the first predetermined position to the second predetermined position. By executing periodic imaging by the image pickup unit 32 while the car 21 is moving from the first predetermined position to the second predetermined position, an image of the entire inspection target range on the main rope 23 is acquired. Will be done. After that, when the car 21 reaches the second predetermined position, the operator inputs an instruction to stop imaging by using the start-up unit 37. As a result, the periodic imaging operation by the imaging unit 32 is stopped.

During periodic imaging, in other words, during inspection work, the maximum ascending / descending speed of the car 21 partially overlaps with the main rope 23 reflected in two consecutive images on the time axis, for example. It is desirable that the speed is less than the speed that can guarantee that. As a result, it is possible to avoid that a part of the main rope 23 within the inspection target range is not imaged.

Further, the image pickup cycle of the image pickup unit 32 may be, for example, a cycle similar to the cycle in which the elevator operation control unit 27 outputs a pulse signal indicating the count value (car position pulse value) of the counter circuit. The period is not limited to the above, and can be variously modified, for example, a period obtained by multiplying 1 / a (a is an integer of 2 or more) of the period in which the elevator operation control unit 27 outputs a pulse signal.

Here, FIG. 3 shows an example of image data periodically acquired by the image pickup unit 32. As shown in FIGS. 3A to 3C, continuous still images 50 (1) to 50 (M) are reflected in a series of imaging operations by the imaging unit 32 so that substantially the entire main rope 23 is reflected. (M is an integer of 2 or more) is acquired. In FIG. 3, reference numeral 54 indicates an image of the main rope 23.

Two continuous still images 50 (m) and 50 (m + 1) (m is an integer of 1 or more and M or less) on the time axis include an image of the same part of the main rope 23 in a part thereof. That is, a part of the main rope 23 reflected in the still image 50 (m) and a part of the main rope 23 reflected in the still image 50 (m + 1) overlap.

Further, assuming that the total number of markings 51 attached to the main rope 23 is K (K is an integer of 2 or more), each still image 50 (m) is an image 52 of at least two markings 51 adjacent to each other on the main rope 23. (K-1) and 52 (k) (k is an integer of 2 or more and K or less) are included. Hereinafter, the image of the marking 51 (hereinafter, the reference numeral when the images of the marking 51 are generically referred to as 52) is referred to as a marking image. Considering the case where the marking image 52 which is difficult to detect by image analysis is included, it is preferable that each still image 50 (m) contains three or more marking images 52.

Further, is the distance L (see FIG. 2) of the markings 51 attached to the side surface of the main rope 23 about the same as the distance obtained by multiplying the time length of one cycle of the imaging cycle by the maximum ascending / descending speed of the car 21? It should be shorter than that. As a result, all of the markings 51 attached within the inspection target range of the main rope 23 can be set to be the head in any still image (hereinafter, the reference numeral when the still images are collectively referred to). can.

The image data (corresponding to the still image 50) of the main rope 23 periodically acquired by the image pickup unit 32 is sequentially output from the image pickup unit 32 to the information collection control unit 33. Here, the position of the car 21 at the timing when the image pickup unit 32 acquires the image data can be specified based on the car position pulse value indicated by the pulse signal output from the elevator operation control unit 27 in the vicinity of this timing. .. In other words, which part of the main rope 23 the image data acquired by the imaging unit 32 is the image captured is the car position pulse value indicated by the pulse signal output from the elevator operation control unit 27 in the vicinity of the imaging timing. Can be identified based on.

Therefore, the information collection control unit 33 uses the image data and the car position pulse value indicated by the pulse signal input from the elevator operation control unit 27 immediately before or immediately after the timing when the image data is input from the image pickup unit 32. It is stored in the data table (not shown) of the information storage unit 34 in association with each other. This makes it possible for the information storage unit 34 to manage which part of the main rope 23 the image data is captured.

However, if all of the image data and the car position pulse value that are periodically input regardless of whether the car 21 is moving or stopped are stored in the information storage unit 34, a huge amount of unnecessary data is stored in the information storage unit 34. May accumulate. Therefore, for example, the information collection control unit 33 discards the image data and the car position pulse value input during the period when the car 21 is stopped without storing them in the information storage unit 34. As a result, it is possible to prevent a large amount of image data obtained by imaging the same portion of the main rope 23 in the stopped state from being accumulated in the information storage unit 34. Whether the car 21 is moving or stopped can be determined, for example, based on the ascending / descending speed of the car 21 obtained from the difference in the car position pulse values indicated by the continuous pulse signals. ..

Next, the details of the information storage unit 34 and the information processing unit 35 will be described with reference to FIG. FIG. 4 is a block diagram showing a more detailed configuration example of the information storage unit 34 and the information processing unit 35 of the present embodiment.

The information storage unit 34 includes an image storage area 34a, an abnormal image storage area 34b, a determination result storage area 34c, and a car position pulse value storage area 34d.

The image storage area 34a stores the image data input from the information collection control unit 33. The abnormal image storage area 34b stores the abnormal image according to the instruction from the abnormality determination unit 35c (details will be described later).

The determination result storage area 34c stores the determination result input from the abnormality determination unit 35c (details will be described later). The car position pulse value storage area 34d stores the car position pulse value input from the information collection control unit 33.

The information processing unit 35 includes an image processing unit 35a, a rope elongation calculation unit 35b (calculation unit), an abnormality determination unit 35c (determination unit), a brightness change unit 35d, a rope position determination unit 35e, and an abnormality notification unit 35f. And.

The image processing unit 35a acquires the image data stored in the image storage area 34a.

The rope elongation calculation unit 35b detects each marking 51 based on the image data, and executes a calculation process for calculating the elongation amount of the distance between two adjacent markings 51.

The abnormality determination unit 35c executes a determination process for determining whether or not the elongation amount of the main rope 23 is equal to or greater than a predetermined elongation amount threshold value.

The brightness changing unit 35d changes the brightness of the image data (details will be described later).

The rope position determination unit 35e determines (identifies) the position of the main rope 23 and the position of the car 21 based on the car position pulse value input from the car position pulse value storage area 34d.

The abnormality notification unit 35f connects the remote terminal 36 and the network 41 with the determination result indicating the abnormality stored in the determination result storage area 34c and the image data stored in the image storage area 34b at the time of abnormality and used for the determination. Notify the monitoring center 40 (external device) via the device.

Further, when the abnormality determination unit 35c determines that the elongation amount of the main rope 23 is equal to or greater than the predetermined elongation amount threshold value, the brightness changing unit 35d changes the brightness of the image data, and the image data after the brightness change is used. Based on this, the calculation process by the rope elongation calculation unit 35b and the determination process by the abnormality determination unit 35c are performed. By repeating such a series of processes, the abnormality determination unit 35c determines that the main rope 23 is abnormal when it is determined that the elongation amount of the main rope 23 is equal to or more than the predetermined elongation amount threshold value continuously for a predetermined number of times or more. When the abnormality determination unit 35c determines that there is an abnormality, the abnormality determination unit 35c saves the determination result indicating the abnormality in the determination result storage area 34c, and saves the image data used for the determination in the abnormality image storage area 34b in association with the determination result. do.

When the brightness changing unit 35d changes the brightness with respect to the image data, for example, when the average brightness of the image data is small, the brightness is changed so that the average brightness becomes large, and the average brightness of the image data is large. In this case, the luminance may be changed so that the average luminance becomes smaller, but the present invention is not limited to this. For example, the brightness changing unit 35d may be changed while finely adjusting the brightness so that the accuracy of edge detection of the marking 51 using image data is maximized based on a predetermined algorithm.

Next, an example of the rope inspection process will be described with reference to FIG. FIG. 5 is a flowchart showing an example of the rope inspection process of the present embodiment. As a premise, it is assumed that the imaging unit 32 is executing a periodic imaging operation.

First, in step S1, the image processing unit 35a acquires the image data stored in the image storage area 34a.

Next, in step S2, the rope elongation calculation unit 35b detects each marking 51 based on the image data, and calculates the elongation amount of the distance between two adjacent markings 51.

Next, in step S3, the abnormality determination unit 35c determines whether or not the elongation amount of the main rope 23 is equal to or greater than the predetermined elongation amount threshold value. If Yes, the process proceeds to Step S4, and if No, Step S8. Proceed to.

In step S8, the abnormality determination unit 35c stores the normal determination result in the determination result storage area 34c.

In step S4, the abnormality determination unit 35c determines whether or not the number of luminance changes exceeds the number threshold value, and if Yes, the process proceeds to step S6, and if No, the process proceeds to step S5.

In step S5, the luminance changing unit 35d changes the luminance with respect to the image data, and returns to step S2.

In step S6, the abnormality determination unit 35c stores the determination result indicating the abnormality in the determination result storage area 34c, and stores the image data used for the determination in the abnormality image storage area 34b in association with the determination result.

Next, in step S7, the abnormality notification unit 35f determines the determination result indicating the abnormality stored in the determination result storage area 34c and the image data used for the determination stored in the abnormality image storage area 34b. Notify the monitoring center 40 via the remote terminal 36 and the network 41.

As described above, according to the rope inspection device 30 of the present embodiment, whether the rope elongation calculation unit 35b calculates the elongation amount of the main rope 23 and the abnormality determination unit 35c extends the elongation amount exceeds a predetermined elongation amount threshold. By performing the determination process many times while changing the brightness of the image data, the inspection accuracy of the rope can be improved. That is, when the main rope 23 is inspected, it is possible to reduce the erroneous detection of the deterioration of the main rope 23 due to the deterioration of the marking 51 and the imaging environment (too dark, too bright), etc., instead of the deterioration of the main rope 23. can. Therefore, it is possible to reduce the time required for the worker to investigate when an abnormality is detected.

Further, when it is determined that the main rope 23 is abnormal, the determination result indicating the abnormality and the image data used for the determination can be stored in association with each other or transmitted to the monitoring center 40. As a result, the corresponding person can analyze the presence or absence of deterioration of the marking 51 and the state (brightness) of the imaging environment of the main rope 23 by viewing the image data in addition to the determination result.

In addition, compared to the conventional technology, it is not necessary to change the hardware, and it can be realized only by changing the software, so that the cost can be reduced.

The above-described embodiment and its modifications are merely examples for carrying out the present invention, and the present invention is not limited thereto, and various modifications according to specifications and the like are within the scope of the present invention. Further, it is obvious from the above description that various other embodiments are possible within the scope of the present invention. For example, it goes without saying that the modifications appropriately exemplified with respect to the embodiment can be combined with other embodiments.

For example, the target for changing the brightness of the image data may be only the detection portion of the elongation of the main rope 23 that is equal to or greater than the predetermined elongation threshold value, or may be the entire main rope 23.

Further, when the lighting device is used for the image pickup of the main rope 23, the intensity of the lighting by the lighting device at the time of image pickup may be changed.

Further, the previous image data captured by the main rope 23 may be always saved, and both the previous image data and the current image data may be sent to the monitoring center 40 or the like in the event of an abnormality. Then, it becomes easier to investigate the cause of the abnormality.

1 ... Rope inspection system, 20 ... Elevator device, 21 ... Car, 22 ... Counterweight, 23 ... Main rope, 23a ... Strand, 23b ... Core steel, 23A ... Wire rope, 23B ... Cover layer, 24 ... Motor, 25 ... pulse generator, 26 ... hoisting machine, 27 ... elevator operation control unit, 30 ... rope inspection device, 31 ... imaging control unit, 32 ... imaging unit, 33 ... information collection control unit, 34 ... information storage unit, 34a ... image Storage area, 34b ... Abnormal image storage area, 34c ... Judgment result storage area, 34d ... Car position pulse value storage area, 35 ... Information processing unit, 35a ... Image processing unit, 35b ... Rope elongation calculation unit, 35c ... Abnormality determination Unit, 35d ... Brightness changing unit, 35e ... Rope position determination unit, 35f ... Abnormality notification unit

Claims (3)

An acquisition unit that acquires image data of images of side surfaces of a rope that suspends a predetermined object and is marked at predetermined intervals in the axial direction.
A calculation unit that executes a calculation process for calculating the amount of extension of the distance between two adjacent markings based on the image data, and a calculation unit.
A determination unit that executes a determination process for determining whether or not the elongation amount is equal to or greater than a predetermined elongation threshold value.
A luminance changing unit for changing the luminance with respect to the image data is provided.
When the determination unit determines that the elongation amount is equal to or greater than the predetermined elongation threshold value, the brightness changing unit changes the brightness of the image data, and the calculation is based on the image data after the brightness change. A series of processes of performing the calculation process by the unit and the determination process by the determination unit were repeated, and the determination unit determined that the elongation amount was equal to or more than the predetermined elongation amount threshold value continuously for a predetermined number of times or more. A rope inspection device that sometimes determines that something is wrong. The rope inspection device according to claim 1, wherein when the determination unit determines an abnormality, the determination result indicating the abnormality and the image data used for the determination are associated and stored in the storage unit. The rope inspection device according to claim 2, further comprising an abnormality notification unit for notifying an external device of a determination result indicating an abnormality stored in the storage unit and image data used for the determination.

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