Tail cable breakage detection method and device, and elevator control system
阅读说明:本技术 尾缆的破损检测方法以及装置、电梯控制系统 (Tail cable breakage detection method and device, and elevator control system ) 是由 山下加奈 于 2019-05-20 设计创作,主要内容包括:本发明涉及尾缆的破损检测方法以及装置、电梯控制系统,能够在损伤变大之前容易地发现尾缆是否产生破损。实施方式的尾缆的破损检测装置具备:摄像机(20),配置于升降路(10)内的能够对尾缆(16)的破损部位进行摄影的位置,对尾缆(16)的表面进行摄影;以及图像处理装置,对从摄像机(20)取入的图像数据进行分析,提取尾缆(16)的表面所存在的破损区域。(The invention relates to a method and a device for detecting breakage of a tail cable, and an elevator control system, which can easily find whether the tail cable is broken before the damage becomes large. The breakage detection device for a tail cable of an embodiment includes: a camera (20) which is arranged at a position in the ascending/descending path (10) where the damaged portion of the tail cable (16) can be photographed and photographs the surface of the tail cable (16); and an image processing device which analyzes the image data acquired from the camera (20) and extracts a damaged area existing on the surface of the tail cable (16).)
1. A breakage detection device for a tail cable, which detects breakage of a tail cable connecting a car of an elevator with a control panel or a relay panel, is characterized by comprising:
a camera which is arranged at a position in the ascending/descending path where the damaged portion of the tail cable can be photographed and photographs the surface of the tail cable; and
and an image processing device for analyzing the image data captured from the camera and extracting a damaged area existing on the surface of the pigtail cable.
2. The apparatus for detecting breakage of a tail cable according to claim 1,
the camera is disposed on the landing side of the intermediate layer in the middle of the lift stroke.
3. The apparatus for detecting breakage of a tail cable according to claim 1,
the camera is provided in an upward facing posture on a camera movable stand which is movably engaged with the U-shaped bent portion of the tail cable via a roller.
4. The apparatus for detecting breakage of a tail cable according to claim 1,
a 3D scanner is provided in combination with the camera, and projects laser light to the tail cable, and reproduces a three-dimensional shape of a surface from the reflected light.
5. A method for detecting breakage of a tail cable, which detects breakage of a tail cable connecting a car of an elevator with a control panel or a relay panel,
a camera for photographing the surface of the tail cable is arranged at a position in the lifting path where the damaged part of the tail cable can be photographed,
analyzing the image data captured from the camera, and extracting a damaged area existing on the surface of the pigtail cable.
6. The method of detecting breakage of a pigtail cable according to claim 5,
an alarm is generated in which the degree of damage is ranked based on the size, shape, and position of the extracted damaged portion of the tail cable.
7. The method of detecting breakage of a pigtail cable according to claim 5,
the sound of the tail cable when colliding with the structure in the lifting path is detected, and the position of the damaged part is obtained according to the position of the car at the moment.
8. A control system for an elevator, which deals with a situation in which a tail cable connecting a car of the elevator to a control panel or a relay panel is damaged, is characterized by comprising:
a breakage detection device is provided with: a camera which is arranged at a position in the ascending/descending path where the damaged portion of the tail cable can be photographed and photographs the surface of the tail cable; and an image processing device for analyzing the image data captured from the camera and extracting a damaged area existing on the surface of the pigtail cable; and
and a control device which, upon receiving an alarm that the tail cable is broken from the breakage detection device, performs a guiding operation of guiding the car of the elevator and then stopping the elevator.
9. Control system of an elevator according to claim 8,
in the guiding operation, when a user gets on the car, the car is guided to the nearest floor, and the elevator is stopped after the user gets off the nearest floor.
10. The control system of an elevator according to claim 9,
the same guiding operation is performed for the other elevator adjacent to the elevator in which the tail cable is damaged.
Technical Field
The embodiment of the invention relates to a method and a device for detecting breakage of a tail cable (tail code).
Background
A tail cable formed by bundling electric wires such as an electric power line for supplying electric power and a signal line for exchanging signals with a control panel is connected to a car of an elevator. The tail cable is suspended so as to hang down from the car, and moves up and down following the up and down of the car.
A net using a metal net or the like is provided along a wall surface of the ascending/descending path. The tail cable is not hooked on the lifting road by laying the net.
The tail cable often oscillates with the movement of the car. In this case, when the tail cable is repeatedly contacted with the net several times, the tail cable may be damaged, and in the worst case, the wire may be broken.
Various measures have been taken against such swinging of the tail cable. As a main countermeasure, the sway of the tail cable is monitored by imaging the sway as a video (patent document 1), or the sway of the tail cable is suppressed by putting the bent portion of the tail cable into the duct (duct) (patent document 2).
Patent document 1: japanese patent laid-open publication No. 2015-113182
Patent document 2: japanese patent laid-open publication No. 2014-118245
However, conventionally, in order to prevent the sway of the tail cable, which causes breakage of the tail cable, emphasis has been placed on prevention of the sway. As for whether or not the tail cable is damaged, the actual situation is that it cannot be clearly known unless the maintenance personnel perform an inspection by a periodic inspection or the like.
When the tail cable is left alone even if it is damaged, the damage is increased, and the signal line or the like is broken. Only then will the first time know the situation that the tail cable has produced the damage. When such a stage occurs, a situation may develop in which the car stops and passengers are trapped in the car.
Disclosure of Invention
The present invention has been made in view of the problems of the conventional techniques described above, and an object thereof is to provide a method and an apparatus for detecting breakage of a tail cable, which can easily detect whether or not the tail cable is broken before the damage becomes large, and can prevent an accident such as a passenger getting trapped.
In order to achieve the above object, a breakage detection device for a tail cable according to an embodiment of the present invention is a breakage detection device for a tail cable that connects a car of an elevator to a control panel or a relay panel, the breakage detection device including: a camera which is arranged at a position in the ascending/descending path where the damaged portion of the tail cable can be photographed and photographs the surface of the tail cable; and an image processing device for analyzing the image data captured from the camera and extracting a damaged area existing on the surface of the tail cable.
In addition, a method for detecting breakage of a tail cable according to an embodiment of the present invention is a method for detecting breakage of a tail cable connecting a car of an elevator to a control panel or a relay panel, wherein a camera for photographing a surface of the tail cable is disposed at a position in an elevator shaft where a damaged portion of the tail cable can be photographed, image data taken in from the camera is analyzed, and a damaged region existing on the surface of the tail cable is extracted.
Drawings
Fig. 1 is a diagram schematically showing an elevator to which a tail cable breakage detection device according to embodiment 1 of the present invention is applied.
Fig. 2 is a diagram showing an operation in which the tail cable is broken and the broken tail cable is captured by the camera.
Fig. 3 is a block diagram showing a system for implementing the method for detecting breakage of a tail cable according to embodiment 1.
Fig. 4 is a diagram showing an example of an image showing a state of breakage of the tail cable.
Fig. 5 is a flowchart showing the operation of the broken tail cable detection device according to embodiment 1.
Fig. 6 is a diagram showing another arrangement example of the video camera.
Fig. 7 is a diagram showing a camera movable stand according to embodiment 2.
Fig. 8 is a block diagram of a broken tail cable detection system according to embodiment 3.
Detailed Description
Hereinafter, one embodiment of a method and an apparatus for detecting breakage of a tail cable according to the present invention will be described with reference to the drawings.
(embodiment 1)
Fig. 1 is a diagram schematically showing an elevator to which a tail cable breakage detection device according to embodiment 1 of the present invention is applied. In fig. 1,
Electric power is supplied to the
A net 11 formed of a metal net is provided along the wall surface of the
In an elevator having a long lifting stroke, the
The flaw or crack generated in the coating layer on the outer side of the
The method for detecting breakage of a tail cable according to the present embodiment is a method including: the breakage of the
Next, fig. 3 is a block diagram showing a system for implementing the method for detecting a broken tail cable according to the present embodiment.
The
Fig. 4 is a diagram showing an example of a broken state of the
If there is a damage on the surface of the
When the damaged portion is extracted, the
Next, the operation of the breakage detection device for a tail cable according to the present embodiment will be described with reference to the flowchart of fig. 5.
During operation of the elevator, the surface of the
However, the
The portion of the
In fig. 3, while the
If the
Here, as a result of the image processing, it is assumed that the breakage as shown in fig. 4 is extracted.
In fig. 4, the blackened portion is a broken portion.
The degree of damage is determined by adding three levels of "light", "medium", and "heavy" mainly based on the area size and distribution of the damaged region. The "medium" level indicates a state that can be evaluated as a state in which a great deal of damage has progressed to the
Returning to the flowchart of fig. 5, in step S14, when the degree of damage of the
In the present embodiment, when the alarm determined to be at the "intermediate" level or higher is transmitted to the
The above-described guiding operation is performed for the elevator having the number of the
As described above, according to the present embodiment, the state of the
In the above-described embodiment, the
The cameras 20a, 20b, and 20c are disposed in the pit of the ascending/descending road. The camera 20d is disposed under the
(embodiment 2)
Next, a broken tail cable detection device according to embodiment 2 of the present invention will be described with reference to fig. 7.
In embodiment 2, the
The camera movable stand is provided at a U-shaped bent portion of the
According to embodiment 2 described above, the camera movable table moves along the U-shaped curved portion of the
(embodiment 3)
Next, fig. 8 is a frame configuration diagram showing a damaged tail cable detection device according to embodiment 3 of the present invention.
This embodiment 3 is an embodiment in which the 3D scanner 35 is used together with the
A microphone 33 for detecting a sound generated when the
According to embodiment 3 described above, the depth of the damaged portion (damage of the cover layer alone, or damage affecting the wiring inside and the like) cannot be known only by analyzing the image captured by the
The method and apparatus for detecting breakage of a tail cable according to the present invention have been described above with reference to preferred embodiments, but these embodiments are given as examples and are not intended to limit the scope of the present invention. It is to be understood that the novel devices, methods and systems described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made therein without departing from the spirit of the invention. The claims and their equivalents are intended to cover the embodiments or modifications thereof within the scope of the inventive concept.
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