CN112839891B - Point inspection device and point inspection system for elevator with function of point inspection of interior of hoistway - Google Patents
Point inspection device and point inspection system for elevator with function of point inspection of interior of hoistway Download PDFInfo
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- CN112839891B CN112839891B CN201880098479.3A CN201880098479A CN112839891B CN 112839891 B CN112839891 B CN 112839891B CN 201880098479 A CN201880098479 A CN 201880098479A CN 112839891 B CN112839891 B CN 112839891B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
Provided is a point inspection device for an elevator, which can obtain a point inspection image with high resolution. The point inspection device for an elevator includes a camera provided at an upper part or a lower part of a car of the elevator, and rotating in response to the lift of the car so that imaging ranges before and after one rotation around a vertical direction as an axis overlap in the vertical direction, assuming that the imaging direction is a horizontal direction. According to this spot inspection device, the camera is rotated in accordance with the lift of the car so that the imaging ranges before and after one rotation around the vertical direction as the axis overlap in the vertical direction. Therefore, a high-resolution spot inspection image can be obtained.
Description
Technical Field
The present invention relates to a point inspection device and a point inspection system for an elevator, which have a function of point inspecting the interior of a hoistway.
Background
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. Sho 63-123782
Disclosure of Invention
Problems to be solved by the invention
However, in the spot inspection device described in patent document 1, the imaging direction of the camera is below or above the hoistway. Therefore, the area of the hoistway wall surface per pixel of the camera becomes large. As a result, a high-resolution spot inspection image cannot be obtained.
The present invention has been made to solve the above problems. The invention aims to provide a point detection device of an elevator, which can obtain a point detection image with high resolution.
Means for solving the problems
The elevator spot inspection device of the present invention includes a camera provided at an upper part or a lower part of a car of an elevator, and rotates in accordance with the lift of the car so that imaging ranges before and after one rotation around a vertical direction as an axis overlap in the vertical direction and the entire area of a hoistway wall surface is imaged during one rotation.
The point inspection device for an elevator according to the present invention includes a camera provided at an upper portion or a lower portion of a car of the elevator, the camera being rotated in response to the lift of the car so that imaging ranges before and after one rotation around a vertical direction as an axis overlap in the vertical direction, assuming that the imaging direction is a horizontal direction.
The elevator spot inspection system of the present invention includes an image generating device that determines an overlapping range from an image captured by a camera of the spot inspection device and generates a spot inspection image of a hoistway wall surface of the elevator.
Effects of the invention
According to the present invention, the camera is rotated in accordance with the lift of the car so that the imaging ranges before and after one rotation around the vertical direction as the axis overlap in the vertical direction. Therefore, a high-resolution spot inspection image can be obtained.
Drawings
Fig. 1 is a configuration diagram of an elevator system to which a point inspection system of an elevator according to embodiment 1 is applied.
Fig. 2 is a diagram for explaining an outline of an imaging range of a camera of the elevator spot inspection system in embodiment 1.
Fig. 3 is a diagram for explaining a method 1 of generating a spot inspection image of a maintenance terminal of an elevator spot inspection system according to embodiment 1.
Fig. 4 is a diagram for explaining a 2 nd example of a point inspection image generation method of a maintenance terminal of an elevator point inspection system in embodiment 1.
Fig. 5 is a diagram for explaining example 3 of a point inspection image generation method of a maintenance terminal of an elevator point inspection system according to embodiment 1.
Fig. 6 is a flowchart for explaining an outline of an operation of a control device of an elevator system to which the point inspection system of an elevator in embodiment 1 is applied.
Fig. 7 is a flowchart for explaining an outline of the operation of the maintenance terminal of the elevator spot inspection system in embodiment 1.
Fig. 8 is a hardware configuration diagram of a maintenance terminal of an elevator point inspection system according to embodiment 1.
Fig. 9 is a plan view of essential parts of an elevator system to which the point inspection system for an elevator in embodiment 2 is applied.
Fig. 10 is a side view of a main part of an elevator system to which the point inspection system of an elevator in embodiment 3 is applied.
Detailed Description
The mode for carrying out the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. Repeated explanation of this part is appropriately simplified or omitted.
Fig. 1 is a configuration diagram of an elevator system to which a point inspection system of an elevator in embodiment 1 is applied.
In the elevator system of fig. 1, a hoistway 1 extends through each floor of a building not shown. The machine room 2 is provided directly above the hoistway 1. Each of the plurality of landings 3 is provided on each floor of the building. Each of the landings 3 faces the hoistway 1.
The hoisting machine 4 is provided in the machine room 2. The main ropes 5 are wound around the traction machine 4.
The car 6 is disposed inside the hoistway 1. The car 6 is suspended on one side of the main rope 5. The counterweight 7 is disposed inside the hoistway 1. The counterweight 7 is suspended on the other side of the main rope 5.
The landing doors 8 are provided at the entrances of the landings 3. The car door 9 is provided at an entrance of the car 6.
For example, the spot inspection apparatus has a camera 10 and a rotation control apparatus 11. The camera 10 is detachably provided on the upper portion of the car 6. The camera 10 is rotatably disposed with the shooting direction set to the horizontal direction. For example, the rotation control device 11 is detachably provided on the upper portion of the car 6.
The control device 12 is provided in the machine room 2. The control device 12 is electrically connected to the equipment of the hoisting machine 4 and the car 6. The control device 12 is provided to be able to control the elevator as a whole.
The monitoring device 13 is provided in the machine room 2. The monitoring device 13 is electrically connected to the control device 12. The monitoring device 13 is provided to be able to monitor the state of the elevator based on information from the control device 12.
The information center device 14 is installed at a place remote from the building where the elevator is installed. The information center device 14 is installed in an elevator maintenance company, for example. The information center device 14 is provided so as to be able to grasp the state of the elevator based on the information from the monitoring device 13.
The maintenance terminal 15 is carried by a maintenance person of the elevator.
When inspecting the elevator at a maintenance site, a maintenance worker mounts the camera 10 and the rotation control device 11 on the upper portion of the car 6. A maintenance person, for example, operates the maintenance terminal 15 to set the operation mode of the elevator to the hoistway photography mode.
The control device 12 switches the operation mode of the elevator to the hoistway imaging mode in accordance with a command from the maintenance terminal 15, and rotates the camera 10 in accordance with the raising and lowering of the car 6. Specifically, the control device 12 outputs a rotation command to the rotation control device 11 in accordance with the raising and lowering of the car 6. The rotation control device 11 rotates the camera 10 about the vertical direction as an axis in accordance with the rotation command. At this time, the camera 10 is rotated so that the shooting ranges before and after one rotation overlap in the vertical direction.
After the image pickup by the camera 10, the maintenance worker performs spot inspection of the elevator devices in the hoistway 1 such as the main rope 5, the counterweight 7, the guide rail not shown, the control cable, and the landing doors, which are inspection target devices, based on the spot inspection image of the wall surface of the hoistway 1 generated from the image picked up by the camera 10.
Next, an outline of the imaging range of the camera 10 will be described with reference to fig. 2.
Fig. 2 is a diagram for explaining an outline of an imaging range of a camera of the elevator spot inspection system in embodiment 1.
The broken line in fig. 2 is a line schematically showing the center point of the imaging range of the camera 10 when the camera 10 rotates in accordance with the raising and lowering of the car 6.
If the car 6 is set to move by a distance shorter than the imaging range of the camera 10 in the vertical direction while the camera 10 is rotated once, the camera 10 images the entire area of the wall surface of the hoistway 1.
For example, the control device 12 not shown in fig. 2 calculates a value of the rotational speed of the camera 10 so as to be able to photograph the entire area of the wall surface of the hoistway 1, based on the speed of the car 6 detected by an encoder not shown. The control device 12 outputs a rotation command corresponding to the value of the rotation speed to the rotation control device 11.
Next, as a 1 st example of the point inspection image generation method, a case where the apparatus to be inspected is the main rope 5 will be described with reference to fig. 3.
Fig. 3 is a diagram for explaining a method 1 of generating a spot inspection image of a maintenance terminal of an elevator spot inspection system according to embodiment 1.
As shown in fig. 3, the maintenance terminal 15 determines the overlapping range from the images when the camera 10 is rotated in accordance with the elevation of the car 6 so that the imaging ranges before and after one rotation around the vertical direction as the axis overlap in the vertical direction, and generates a spot inspection image of the wall surface of the hoistway 1. Here, the maintenance person selects the main rope 5 as the device to be spot-inspected. As a method of selecting the device to be spot-inspected, if the display screen of the maintenance terminal 15 is a touch panel, it is possible to select the device by touching the image portion of the main rope 5 from the generated spot-inspection image of the wall surface of the hoistway 1. In addition, if the image features of each device of the elevator are stored in the maintenance terminal 15 as a candidate list of devices to be checked in advance in association with the name of each device of the elevator, the maintenance worker can select from the candidate list of devices to be checked on the display screen of the maintenance terminal 15. Further, if the imaging angle of the camera 10 is stored together with the captured image with the preset position of the hoistway as the starting point, the maintenance worker can select the device to be spot-inspected by specifying the range of the imaging angle at which the desired device to be spot-inspected exists.
In the following 2: in the case of 1 roping, the main ropes 5 move at 2 times the speed of the car 6. Therefore, when the main rope 5 is selected as the device to be spot-inspected, the maintenance terminal 15 determines the overlapping range of the main rope 5 from the image when the camera 10 rotates in accordance with the raising and lowering of the car 6 so that the imaging ranges before and after two rotations around the vertical direction as the axis overlap in the vertical direction, and generates the spot-inspection image of the main rope 5.
At this time, the maintenance terminal 15 functions as an image generating device that displays a point inspection image of the wall surface of the hoistway 1 and a point inspection image of the main rope 5 on a display screen as a display device separately.
Next, as a 2 nd example of the spot image generating method, a case where the apparatus to be checked is the main rope 5 will be described with reference to fig. 4.
Fig. 4 is a diagram for explaining a 2 nd example of a point inspection image generation method of a maintenance terminal of an elevator point inspection system in embodiment 1.
As shown in fig. 4, the maintenance terminal 15 is an image generating device that displays a point inspection image, which is a point inspection image of the wall surface of the hoistway 1 with a gap in the vertical direction, on a display screen as a display device adjacent to the point inspection image of the main rope 5. At this time, the vertical position is displayed so as to match the vertical position, and the spot image of the main rope 5 and the spot image of the wall surface of the hoistway 1 are displayed with a gap in the vertical direction.
Next, as example 3 of the spot image generation method, a case where the apparatus to be checked is the main rope 5 will be described with reference to fig. 5.
Fig. 5 is a diagram for explaining example 3 of a point inspection image generation method of a maintenance terminal of an elevator point inspection system according to embodiment 1.
As shown in fig. 5, the maintenance terminal 15 is an image generating device that displays a point inspection image of the wall surface of the hoistway 1 and a point inspection image obtained by compressing the point inspection image of the main rope 5 in the vertical direction on a display device so as to be adjacent to each other. At this time, the vertical position is matched to display the point inspection image of the wall surface of the hoistway 1 and the point inspection image obtained by compressing the point inspection image of the main rope 5 in the vertical direction.
Next, an outline of the operation of the control device 12 when imaging the wall surface of the hoistway 1 will be described with reference to fig. 6.
Fig. 6 is a flowchart for explaining an outline of an operation of a control device of an elevator system to which the point inspection system of an elevator in embodiment 1 is applied.
In step S1, the control device 12 determines whether the operation mode of the elevator is the hoistway imaging mode. When the operation mode of the elevator is not the hoistway imaging mode in step S1, the control device 12 continues the operation of step S1. When the operation mode of the elevator is the hoistway-image-capturing mode in step S1, the control device 12 performs the operation of step S2.
In step S2, the control device 12 raises the car 6 from the lowermost floor. Then, the control device 12 performs the operation of step S3. In step S3, the control device 12 causes the camera 10 to start shooting. Then, the control device 12 performs the operation of step S4.
In step S4, the control device 12 calculates a value of the rotational speed of the camera 10 from the speed of the car 6 detected by the encoder. Then, the control device 12 performs the operation of step S5. In step S5, the control device 12 outputs a rotation command corresponding to the value of the rotation speed of the camera 10 to the rotation control device 11. Then, the control device 12 performs the operation of step S6.
In step S6, the control device 12 determines whether or not the car 6 has reached the uppermost floor. When the car 6 does not reach the uppermost floor in step S6, the control device 12 performs the operation of step S4. When the car 6 reaches the uppermost floor in step S6, the control device 12 performs the operation of step S7.
In step S7, the control device 12 stops the travel of the car 6. Then, the control device 12 performs the operation of step S8. In step S8, the control device 12 causes the camera 10 to end shooting. Then, the control device 12 ends the operation.
Next, an outline of the operation of the maintenance terminal 15 when generating a spot inspection image of the wall surface of the hoistway 1 will be described with reference to fig. 7.
Fig. 7 is a flowchart for explaining an outline of the operation of the maintenance terminal of the elevator spot inspection system in embodiment 1.
In step S11, the maintenance terminal 15 determines whether or not an image is generated by an operation request from the outside. When the image generation is not requested in step S11, the maintenance terminal 15 continues the operation of step S11. When the image generation is requested in step S11, the maintenance terminal 15 performs the operation of step S12.
In step S12, the maintenance terminal 15 determines the overlapping range from the image captured by the camera 10. Then, the maintenance terminal 15 performs the operation of step S13. In step S13, the maintenance terminal 15 generates a point inspection image of the wall surface of the hoistway 1 and a point inspection image of the inspection target device based on the overlap range. Then, the maintenance terminal 15 ends the operation.
According to embodiment 1 described above, the camera 10 is rotated in accordance with the raising and lowering of the car 6 so that the imaging ranges before and after one rotation around the vertical direction as the axis overlap in the vertical direction. Therefore, a high-resolution spot inspection image can be obtained by one camera 10.
Further, the camera 10 rotates according to the detection result of the encoder. Therefore, the camera 10 can be rotated at a more appropriate speed. For example, if the camera 10 is rotated in accordance with the maximum speed of the car 6, a high-resolution spot inspection image can be obtained in a short time.
Further, the camera 10 may be rotated based on a detection result of a sensor that detects at least one of the position, the speed, and the acceleration of the car 6. In this case, the camera 10 can be rotated at a more appropriate speed.
The maintenance terminal 15 determines the overlapping range from the image captured by the camera 10, and generates a spot inspection image of the wall surface of the hoistway 1. Therefore, an accurate spot inspection image can be obtained. In this case, if the same region is searched for based on the feature amount of the image, an accurate spot detection image can be obtained.
The maintenance terminal 15 displays a point inspection image of the wall surface of the hoistway 1 on a display screen as a display device separately from a point inspection image of the device to be point inspected. Therefore, the point inspection image of the wall surface of the hoistway 1 and the point inspection image of the inspection target device can be simultaneously checked at an appropriate resolution.
The maintenance terminal 15 displays a spot inspection image in which a gap is formed in the vertical direction with respect to the spot inspection image of the wall surface of the hoistway 1 on a display screen as a display device so as to be adjacent to the spot inspection image of the apparatus to be spot inspected. Therefore, the wall surface of the hoistway 1 and the device to be inspected can be inspected at the same time while aligning the vertical positions.
The maintenance terminal 15 displays the point inspection image of the wall surface of the hoistway 1 on the display device adjacent to the point inspection image obtained by compressing the point inspection image of the device to be point inspected in the vertical direction. Therefore, the wall surface of the hoistway 1 and the device to be inspected can be inspected at the same time while aligning the vertical positions.
Next, an example of the maintenance terminal 15 will be described with reference to fig. 8.
Fig. 8 is a hardware configuration diagram of a maintenance terminal of the elevator spot inspection system according to embodiment 1.
The functions of the maintenance terminal 15 may be implemented by processing circuitry. For example, the processing circuitry has at least one processor 16a and at least one memory 16b. For example, the processing circuit has at least one dedicated hardware 17.
In the case of a processing circuit having at least one processor 16a and at least one memory 16b, the functions of the maintenance terminal 15 are implemented by software, firmware or a combination of software and firmware. At least one of the software and the firmware is referred to as a program. At least one of the software and firmware is stored in the at least one memory 16b. The at least one processor 16a realizes the functions of the maintenance terminal 15 by reading out and executing the programs stored in the at least one memory 16b. The at least one processor 16a is also referred to as a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a DSP. For example, the at least one memory 16b is a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, or the like, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.
In case the processing circuit has at least one dedicated hardware 17, the processing circuit is for example implemented by a single circuit, a complex circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA or a combination thereof. For example, each function of the maintenance terminal 15 is realized by a processing circuit. For example, the functions of the maintenance terminal 15 are collectively realized by a processing circuit.
The functions of the maintenance terminal 15 may be partially implemented by dedicated hardware 17, and the other parts may be implemented by software or firmware. For example, the function of generating a spot inspection image may be realized by a processing circuit as the dedicated hardware 17, and the functions other than the function of generating a spot inspection image may be realized by at least one processor 16a reading out and executing a program stored in at least one memory 16b.
In this way, the processing circuitry implements the functions of the maintenance terminal 15 by hardware 17, software, firmware, or a combination thereof.
Although not shown, the respective functions of the control device 12 may be realized by a processing circuit equivalent to a processing circuit that realizes the respective functions of the maintenance terminal 15. The functions of the monitoring device 13 may be realized by a processing circuit equivalent to the processing circuit for realizing the functions of the maintenance terminal 15. Each function of the information center apparatus 14 may be realized by a processing circuit equivalent to a processing circuit for realizing each function of the maintenance terminal 15.
Embodiment mode 2
Fig. 9 is a plan view of a main part of an elevator system to which the point inspection system of an elevator in embodiment 2 is applied. The same or corresponding portions as those in embodiment 1 are denoted by the same reference numerals. The description of this portion is omitted.
In fig. 9, the guide rail 18 is provided inside the hoistway 1. The plurality of rolling guides 19 are provided in the car 6 not shown in fig. 9.
The rotating mechanism 20 is provided in the car 6. The rotation mechanism 20 supports the camera 10. The rotation mechanism 20 is in contact with one of the plurality of rolling guides 19.
In embodiment 2, when the car 6 is raised and lowered, the plurality of rolling guides 19 move while rotating along the guide rails 18. At this time, the rotation mechanism 20 rotates in correspondence with the rotation of one of the plurality of rolling guides 19. The camera 10 rotates in correspondence with the rotation of the rotation mechanism 20.
According to embodiment 2 described above, the camera 10 rotates in accordance with the rotation of the rotation mechanism 20. The camera 10 can be mechanically rotated without the need to rotate the control device 11.
Fig. 10 is a side view of a main part of an elevator system to which the point inspection system of an elevator in embodiment 3 is applied. The same or corresponding portions as those in embodiment 1 are denoted by the same reference numerals. The description of this part is omitted.
In fig. 10, a pair of hanging wheels 21 is provided at a lower portion of the car 6. The pair of hoisting wheels 21 are supported by the main rope 5.
The rotating mechanism 20 is provided in the car 6. The rotation mechanism 20 supports the camera 10. The rotating mechanism 20 is in contact with one of the pair of hanging wheels 21.
In embodiment 3, when the car 6 is lifted, the pair of hoisting sheaves 21 rotate in accordance with the movement of the main ropes 5. At this time, the rotation mechanism 20 rotates in accordance with the rotation of one of the pair of hanging wheels 21. The camera 10 rotates in correspondence with the rotation of the rotation mechanism 20.
According to embodiment 3 described above, the camera 10 rotates in accordance with the rotation of the rotation mechanism 20. The camera 10 can be mechanically rotated without the need to rotate the control device 11.
The spot inspection systems according to embodiments 1 to 3 may be applied to an elevator without the machine room 2. In this case, a high-resolution spot inspection image can be obtained by one camera 10.
The camera 10 according to embodiments 1 to 3 may be provided in the car 6 at all times. In this case, when the elevator is operating normally, a high-resolution spot inspection image can be obtained by one camera 10.
Industrial applicability
As described above, the elevator spot inspection device according to the present invention can be used in an elevator system.
Description of the reference symbols
1, a shaft; 2, a mechanical chamber; 3, a landing; 4, a traction machine; 5 a main rope; 6, a lift car; 7 counter weights; 8 landing doors; 9 car doors; 10 cameras; 11 a rotation control device; 12 a control device; 13 a monitoring device; 14 an information center device; 15: maintaining the terminal; 16a: a processor; 16b: a memory; 17: hardware; 18: a guide rail; 19: a rolling guide; 20: a rotation mechanism; 21: a hanging wheel.
Claims (11)
1. A point inspection device for an elevator, wherein,
the elevator spot inspection device includes a camera provided at an upper part or a lower part of a car of an elevator, and rotates in accordance with the lift of the car so that imaging ranges before and after one rotation around a vertical direction as an axis overlap in the vertical direction and the entire area of a hoistway wall surface is imaged during one rotation.
2. A point inspection device for an elevator, wherein,
the elevator spot inspection device comprises a camera which is arranged at the upper part or the lower part of a car of the elevator, and the camera is set to be in the horizontal direction, so that the shooting ranges before and after one rotation by taking the vertical direction as an axis are overlapped in the vertical direction, and the camera is rotated corresponding to the lifting of the car.
3. The point inspection device of an elevator according to claim 1 or 2,
the elevator spot inspection device comprises a rotation control device which rotates the camera according to the detection result of the elevator encoder.
4. The point inspection device of an elevator according to claim 1 or 2,
the elevator spot inspection device comprises a rotation control device which rotates the camera according to the detection result of a sensor which detects at least one of the position, the speed and the acceleration of the car.
5. The point inspection device of an elevator according to claim 1 or 2,
the point inspection device for an elevator includes a rotation mechanism that rotates the camera in accordance with rotation of the rolling guide of the car.
6. The point inspection device of an elevator according to claim 1 or 2,
the elevator spot inspection device includes a rotation mechanism that rotates the camera in accordance with rotation of a hoist wheel of the car.
7. A point inspection system for an elevator, wherein,
the elevator spot inspection system comprises an image generating device for determining an overlapping range from an image captured by a camera of the spot inspection device according to any one of claims 1 to 6 and generating a spot inspection image of a hoistway wall surface of the elevator.
8. The point inspection system of an elevator according to claim 7,
the image generating device determines an overlapping range of the device to be spot-inspected of the elevator based on an image when the camera rotates in accordance with the lift of the car so that imaging ranges before and after the camera rotates two times around a vertical direction as an axis overlap in the vertical direction, and generates a spot-inspection image of the device to be spot-inspected.
9. The point inspection system of an elevator according to claim 8,
the image generation device displays a point inspection image of the hoistway wall surface and a point inspection image of the point inspection target device on a display device separately.
10. The point inspection system of an elevator according to claim 8,
the image generating device displays a point inspection image, which is separated from the point inspection image of the hoistway wall surface by a gap in the vertical direction, on a display device adjacent to the point inspection image of the point inspection target device.
11. The point inspection system of an elevator according to claim 8,
the image generation device displays a point inspection image of the hoistway wall surface and a point inspection image obtained by compressing the point inspection image of the point inspection target device in a vertical direction on a display device so as to be adjacent to each other.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/037816 WO2020075251A1 (en) | 2018-10-10 | 2018-10-10 | Inspection device equipped with function for inspecting interior of elevator shaft, and inspection system |
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| Publication Number | Publication Date |
|---|---|
| CN112839891A CN112839891A (en) | 2021-05-25 |
| CN112839891B true CN112839891B (en) | 2022-11-18 |
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| CN201880098479.3A Active CN112839891B (en) | 2018-10-10 | 2018-10-10 | Point inspection device and point inspection system for elevator with function of point inspection of interior of hoistway |
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| JP (1) | JP7167994B2 (en) |
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| JP7396553B2 (en) | 2021-10-05 | 2023-12-12 | 三菱電機ビルソリューションズ株式会社 | elevator system |
| JP7452594B1 (en) | 2022-09-21 | 2024-03-19 | フジテック株式会社 | Elevator remote inspection system |
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| WO2017145319A1 (en) * | 2016-02-25 | 2017-08-31 | 三菱電機株式会社 | Elevator control device, elevator remote monitoring server, evacuation assistance system, and evacuation assistance method using elevators |
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| Publication number | Publication date |
|---|---|
| JPWO2020075251A1 (en) | 2021-09-02 |
| CN112839891A (en) | 2021-05-25 |
| WO2020075251A1 (en) | 2020-04-16 |
| JP7167994B2 (en) | 2022-11-09 |
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