CN118103317A - Operation test method and operation test device for elevator governor system - Google Patents
Operation test method and operation test device for elevator governor system Download PDFInfo
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- CN118103317A CN118103317A CN202180103166.4A CN202180103166A CN118103317A CN 118103317 A CN118103317 A CN 118103317A CN 202180103166 A CN202180103166 A CN 202180103166A CN 118103317 A CN118103317 A CN 118103317A
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000012423 maintenance Methods 0.000 description 40
- 238000001514 detection method Methods 0.000 description 17
- 238000012545 processing Methods 0.000 description 16
- 230000007246 mechanism Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000003825 pressing Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
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- 239000000470 constituent Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000005314 correlation function Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- SAZUGELZHZOXHB-UHFFFAOYSA-N acecarbromal Chemical compound CCC(Br)(CC)C(=O)NC(=O)NC(C)=O SAZUGELZHZOXHB-UHFFFAOYSA-N 0.000 description 1
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- 230000001939 inductive effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012806 monitoring device Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
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Classifications
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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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- 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
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
Disclosed is a method for testing the operation of a governor system, which can test the operation of the governor system that operates an emergency stop device based on an image in a hoistway in a state where a car is stopped. The operation test method of the elevator speed governor system is a method for testing the operation of the speed governor system in which the emergency stop device (2) is operated when the overspeed state of the elevator car is detected based on the image of the surface of the guide rail (4) acquired by the image sensor (3) arranged on the elevator car (1), and the image sensor acquires the dynamic image of the pattern which simulates the surface state of the guide rail and flows along the lifting direction of the elevator car.
Description
Technical Field
The present invention relates to an operation test method and an operation test device for testing an operation of an elevator governor system for operating an emergency stop device for an elevator.
Background
An elevator apparatus is provided with a governor and an emergency stop device in order to constantly monitor the lifting speed of a car and to make the car in a predetermined overspeed state stop in an emergency. A governor rope coupled to the car is wound around a sheave of the governor. If the car is lifted, the governor rope moves with the car and, therefore, the sheave rotates. When the pulley rotates, the pendulum provided on the pulley swings due to centrifugal force. When the car is in an overspeed state and the swing of the pendulum is increased, the damper rope gripping mechanism is operated by the pendulum, and the movement of the damper rope is restrained. Thus, the emergency stop device on the car side is operated, and the car is stopped in an emergency.
In such an elevator apparatus, since the governor rope as a long object is laid in the hoistway, it is difficult to achieve space saving and cost reduction. In addition, in the case where the governor rope swings, the structure and the governor rope in the hoistway are liable to interfere.
In contrast, the technique described in patent literature 1 is known as a prior art in which an emergency stop device is operated based on the speed of the car without using the mechanical governor described above.
In the conventional technique, the monitoring device outputs an operation signal to the emergency stop device when it is determined that there is an abnormality in the operation state based on speed information from a car speed detecting unit in a detecting unit that detects the position and speed of the car. The position/velocity detection device for a moving body described in patent document 1 (fig. 15) detects the velocity of the moving body based on an image captured by a camera provided in the moving body. In the case where the moving object is an elevator, the wall and column of the hoistway are photographed.
Prior art literature
Patent literature
Patent document 1: international publication No. 2006/073015
Disclosure of Invention
Problems to be solved by the invention
In the operation test of the mechanical governor, the governor rope is removed from the sheave, and the sheave is rotated by the drive device, whereby the operation test can be performed in a state where the car is stopped. However, in a governor system that detects the speed of a car based on an image of a camera, it is difficult to stop the car and perform an operation test.
Accordingly, the present invention provides a method and apparatus for testing the operation of a governor system for an elevator, which can test the operation of the governor system in which an emergency stop device is operated based on an image in a hoistway in a state where a car is stopped.
Means for solving the problems
In order to solve the above problems, an operation test method of an elevator governor system is a method of testing an operation of the governor system in which an emergency stop device is operated when an overspeed state of a car is detected based on an image of a surface of a guide rail obtained by an image sensor provided in the car, and a moving image of a pattern that simulates the surface state of the guide rail and flows in a lifting direction of the car is obtained by the image sensor.
In order to solve the above problems, an operation test apparatus of an elevator governor system according to the present invention tests an operation of a governor system for operating an emergency stop device when an overspeed state of a car is detected based on an image of a surface of a guide rail obtained by an image sensor provided in the car, and includes: and a subject that displays a moving image of a pattern that simulates the surface state of the guide rail and that flows in the direction of lifting and lowering the car, wherein the moving image is acquired by an image sensor.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the operation of the governor system that operates the emergency stop device based on the image of the guide rail can be tested in a state where the car is stopped.
The problems, structures, and effects other than those described above will be apparent from the following description of the embodiments.
Drawings
Fig. 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment.
Fig. 2 is a plan view showing the structure of the electric power tool according to the embodiment.
Fig. 3 is a schematic diagram showing an example of an image of the exposed surface of the guide rail (fig. 1).
Fig. 4 is a block diagram showing a functional configuration of the operation test device according to the embodiment.
Fig. 5 is a view in the direction a and a front view in fig. 1 showing the appearance of an operation test device of the cordless governor system according to the embodiment.
Fig. 6 is a schematic diagram showing an example of a pattern simulating the surface state of a rail.
Fig. 7 is a flowchart showing a flow of an operation test process of the cordless governor system according to the embodiment.
Detailed Description
Hereinafter, embodiments of the present invention will be described by way of example with reference to the accompanying drawings. In the drawings, the same constituent elements are denoted by the same constituent elements or constituent elements having similar functions.
Fig. 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment of the present invention.
As shown in fig. 1, the elevator apparatus includes a car 1, an image sensor 3, an electric work implement 10, drive mechanisms (12 to 20), a tie rod 21, and an emergency stop device 2.
The car 1 is suspended by a main rope (not shown) in a hoistway provided in a building, and slidably engaged with the guide rail 4 via a guide device. When the main rope is friction-driven by a driving device (hoisting machine: not shown), the car 1 is lifted and lowered in the hoistway.
The image sensor 3 is provided in the car 1, and acquires a surface image of the guide rail 4 as a stationary object in the hoistway. As the guide rail 4, a general T-shaped guide rail is used.
In the present embodiment, as the surface image of the guide rail 4, the surface image of the distal end portion of the leg portion of the T-shape is acquired. An image processing device (fig. 2) described later measures the position and speed of the car 1 based on the surface image of the guide rail 4 acquired by the image sensor 3. For example, the speed is calculated from the moving distance of the image feature quantity in a given time.
Further, as the image sensor 3, a CCD, CMOS sensor, or the like is used.
The electric work implement 10 is an electromagnetic operator in the present embodiment, and is disposed above the car 1. The electromagnetic actuator includes, for example, a movable piece or a movable rod that is operated by a solenoid or an electromagnet. The electric power tool 10 operates when a given overspeed state of the car 1 is detected by the governor system. At this time, the lift lever 21 is pulled by the driving mechanisms (12 to 20) mechanically connected to the operation lever 11. Thereby, the emergency stop device 2 is brought into a braking state.
The driving mechanisms (12 to 20) will be described later.
The emergency stop devices 2 are disposed one on each of the left and right sides of the car 1. A pair of braking members, not shown, provided in each emergency stop device 2 are movable between a braking position and a non-braking position, and the guide rail 4 is held in the braking position. Further, when the emergency stop device 2 is raised relative to the car 1 by the lowering of the car 1, a braking force is generated by a frictional force acting between the brake and the guide rail 4. Thus, the emergency stop device 2 operates when the car 1 falls into an overspeed state, and the car 1 is stopped in an emergency.
The elevator apparatus of the present embodiment includes a so-called ropeless governor system that does not use a governor rope, and when the lifting speed of the car 1 exceeds a rated speed and reaches a first overspeed (for example, a speed not exceeding 1.3 times the rated speed), the power supply to the drive apparatus (hoisting machine) and the power supply to a control apparatus that controls the drive apparatus are cut off. When the descent speed of the car 1 reaches the second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the electric work implement 10 provided to the car 1 is electrically driven, and the emergency stop device 2 is operated to bring the car 1 into emergency stop.
In the present embodiment, the ropeless governor system is constituted by the aforementioned image sensor 3 and a safety controller that determines an overspeed state of the car 1 based on an output signal of the image sensor 3. The safety controller outputs a command signal for shutting off the power supply to the drive device (hoisting machine) and the power supply to the control device for controlling the drive device when it is determined that the speed of the car 1 measured by the image processing reaches the first overspeed based on the output signal of the image sensor. If the safety controller determines that the measured speed reaches the second overspeed, the safety controller outputs a command signal for operating the electric power tool 10.
As described above, when the pair of stoppers provided in the emergency stop device 2 are pulled by the pull rod 21, the pair of stoppers clamp the guide rail 4. The lift lever 21 is driven by driving mechanisms (12 to 20) connected to the electric power tool 10.
The structure of the driving mechanism will be described below.
The operation lever 11 of the electric power tool 10 and the 1 st working piece 16 are connected to each other to form a1 st link member having a substantially T-shape. The operation lever 11 and the 1 st working piece 16 constitute a head and a foot of the T-shape, respectively. The 1 st link member having a substantially T shape is rotatably supported by the crosshead 50 via the 1 st working shaft 19 at a joint portion between the operation lever 11 and the 1 st working piece 16. One (left side in the drawing) end of a pair of lift levers 21 is connected to an end of the T-shaped leg portion on the opposite side of the connecting portion of the operation lever 11 and the 1 st working piece 16 from the 1 st working piece 16.
The connection piece 17 and the 2 nd working piece 18 are connected to form a2 nd link member having a substantially T-shape. The connecting piece 17 and the 2 nd working piece 18 constitute the head and the foot of the T-shape, respectively. The 2 nd link member having a substantially T-shape is rotatably supported by the joint portion of the connecting piece 17 and the 2 nd working piece 18 via the 2 nd working shaft 20 at the crosshead 50. The other end (left side in the drawing) of the pair of lift pins 21 is connected to the end of the 2 nd working piece 18 which is the leg of the T and opposite to the connecting portion of the connecting piece 17 and the 2 nd working piece 18.
The end of the operating lever 11 extending from the inside to the outside of the electric working machine housing 30 and the end of the connecting piece 17 located closer to the upper part of the car 1 than the 2 nd working shaft 20 are connected to one end (left side in the figure) and the other end (right side in the figure) of the drive shaft 12 laterally placed on the car 1, respectively. The drive shaft 12 slidably penetrates the fixing portion 14 fixed to the crosshead 50. Further, the driving shaft 12 penetrates the pressing member 15, and the pressing member 15 is fixed to the driving shaft 12. The pressing member 15 is located on the 2 nd link member (connecting piece 17,2 nd working piece 18) side of the fixing portion 14. A drive spring 13 as an elastic body is located between the fixing portion 14 and the pressing member 15, and the drive shaft 12 is inserted into the drive spring 13.
When the electric power tool 10 is operated, that is, when the energization of the electromagnet is cut off in the present embodiment, the electromagnetic force that restrains the movement of the operation lever 11 against the urging force of the driving spring 13 is eliminated, and therefore, the driving shaft 12 is driven in the longitudinal direction by the urging force of the driving spring 13 applied to the pressing member 15. Thus, the 1 st link member (the operation lever 11, the 1 st working piece 16) rotates about the 1 st working shaft 19, and the 2 nd link member (the connecting piece 17, the 2 nd working piece 18) rotates about the 2 nd working shaft 20. Thereby, one of the lift pins 21 connected to the 1 st working piece 16 of the 1 st link member is driven to lift, and the other lift pin 21 connected to the 2 nd working piece 18 of the 2 nd link member is driven to lift.
Further, in the present embodiment, as shown in fig. 1, an operation test device 200 for testing the operation of the above-described cordless speed governor system for operating the emergency stop device 2 is detachably attached to the guide rail 4.
The motion test apparatus 200 includes a subject whose image is detected by the image sensor 3. The object has a pattern simulating the surface state of the guide rail, and the pattern flows along the traveling direction of the car 1. The cordless governor system detects the velocity of the flow of the pattern of the object by detecting the image of such object with the image sensor 3. Therefore, even in a state where the car 1 is stopped without traveling, the ropeless governor system can be operated.
Fig. 2 is a plan view showing the structure of the electric power tool 10 according to the present embodiment in the installed state of fig. 1. In addition, the electric work implement 10 shown in fig. 2 is stored in the electric work implement housing 30 in fig. 1.
Fig. 2 also shows the structure of the cordless governor system (3, 90, 103) for operating the electric actuator 10. In fig. 2, the emergency stop device 2 (fig. 1) is in a non-braking state, and the electric power tool 10 is in a standby state. That is, the elevator apparatus is in a normal operation state.
As shown in fig. 2, in the standby state, the movable member 34 connected to the lever 11 is attracted to the electromagnets 35a and 35b energized by the coil energization by the electromagnetic force. Thereby, the movement of the movable element 34 is restrained against the force F acting on the drive spring 13 (fig. 1) of the movable element 34 via the drive shaft 12 (fig. 1) and the operation lever 11. Accordingly, the electric power tool 10 restrains the movement of the drive mechanism (12 to 20: fig. 1) against the urging force of the drive spring 13.
The movable element 34 has: an attracting portion 34a attracted to the magnetic pole surfaces of the electromagnets 35a, 35 b; and a support portion 34b fixed to the suction portion 34a and connected to the operation lever 11. The lever 11 is rotatably connected to the support portion 34b via a connection bracket 38. In the electric power tool 10, a movable element detection switch 109 is provided at a position where the suction portion 34a of the movable element 34 is located at the time of standby.
The movable member 34 further has a cam portion 34c fixed to the suction portion 34 a. When the movable element 34 is at the standby position, the movable element detection switch 109 is operated by the cam portion 34c. When the cam portion 34c operates, the movable element detection switch 109 is switched from the on state to the off state, or from the off state to the on state. Therefore, whether or not the movable element 34 is located at the standby position can be detected in correspondence with the state of the movable element detection switch 109. In the present embodiment, the elevator controller 6 described later determines whether the movable element 34 is located at the standby position based on the state of the movable element detection switch 109.
In the present embodiment, at least the adsorbing portion 34a of the movable element 34 contains a magnetic material. As the magnetic material, soft magnetic materials such as low carbon steel and permalloy (iron-nickel alloy) are preferably used.
The other mechanism parts (36, 37, 39, 41) in fig. 2 will be described later.
The electromagnets 35a and 35b are excited by the dc power source 111. In the exciting circuit of the electromagnet 35a, one end of the coil of the electromagnet 35a is connected to the high potential side of the dc power supply 111 via the electrical contact 104a, and the other end of the coil of the electromagnet 35a is connected to the low potential side of the dc power supply 111. In the exciting circuit of the electromagnet 35b, one end of the coil of the electromagnet 35b is connected to the high potential side of the dc power supply 111 via the electrical contact 104b, and the other end of the coil of the electromagnet 35b is connected to the low potential side of the dc power supply 111.
The electrical contacts 104a, 104b are controlled to be turned on/off by the safety controller 103. In the standby state of the electric power tool 10, the safety controller 103 automatically controls the electric contacts 104a and 104b to the on state. As a result, the coils of the electromagnets 35a and 35b are energized, and thus the electromagnets 35a and 35b generate electromagnetic forces.
The electrical contacts 104a and 104b are each constituted by a contact provided in an electromagnetic relay, an electromagnetic contactor, an electromagnetic shutter, or the like, for example.
Next, the operation of the electric power tool 10 when the emergency stop device 2 is operated will be described.
The electric power tool 10 operates by a cordless governor system. In the present embodiment, the cordless speed regulator system is constituted by the image sensor 3, the image processing apparatus 90, and the safety controller 103. In addition, the security controller 103 may have a function of the image processing apparatus 90.
The image processing device 90 calculates the speed of the car 1 by performing image processing on the surface image of the guide rail 4 obtained by the image sensor 3, and outputs a detected speed signal S 1 indicating the calculated speed value. The safety controller 103 determines whether or not the lifting speed of the car 1 reaches the first overspeed (for example, a speed not exceeding 1.3 times the rated speed) based on the detected speed signal S 1 input from the image processing device 90. Further, the safety controller 103 determines whether or not the descent speed of the car 1 reaches the second overspeed (for example, a speed not exceeding 1.4 times the rated speed (> first overspeed)) based on the detected speed signal S 1.
When the safety controller 103 determines that the lifting speed of the car 1 reaches the first overspeed, it sends an off command S 2 to the shutter 70 (for example, an electromagnetic shutter). When receiving the off command signal S 2, the shutter 70 cuts off the power supply from the power source 60 to the elevator controller 6 and the hoisting machine 8. Therefore, the traction motor 81 of the hoisting machine 8 is stopped, and the brake 82 of the hoisting machine 8 is brought into a braking state. Thereby, the car 1 stops.
When the safety controller 103 determines that the descending speed of the car 1 reaches the second overspeed, it sends a disconnection command signal S 3、S4 to each of the electric contacts 104a and 104 b. The electrical contacts 104a, 104b transition from the on state (fig. 2) to the off state by an off command signal S 3、S4. Therefore, the excitation of the electromagnets 35a and 35b is stopped, and the electromagnetic force acting on the movable element 34 is eliminated. As a result, the restraint of the movable element 34 by the attraction of the attraction portion 34a of the movable element 34 to the electromagnets 35a, 35b is released, and therefore, the movable element 34 moves from the position in the standby state (fig. 2) to the direction of the urging force of the drive spring 13 (right direction in the drawing) by the urging force of the drive spring 13 (F in fig. 2). In the present embodiment, the movable element 34 moves to a position where it contacts the support member 41, that is, to a position P at which the emergency stop device operates, as shown by a two-dot chain line in fig. 2.
With the restraint of the movable element 34 released, the drive shaft 12 is driven by the urging force of the drive spring 13 (fig. 1) in the direction from the fixed portion 14 (fig. 1) to the pressing member (fig. 1) received by the pressing member 15 (fig. 1) of the drive shaft 12. When the drive shaft 12 is driven, the 1 st link member (the operation lever 11 and the 1 st working piece 16: fig. 1) connected to the drive shaft 12 rotates about the 1 st working shaft 19 (fig. 1). Thereby, the lift lever 21 (fig. 1) connected to the 1 st working piece 16 is lifted. When the drive shaft 12 is driven, the 2 nd link member (the connecting piece 17 and the 2 nd working piece 18: fig. 1) connected to the drive shaft 12 rotates about the 2 nd working shaft 20 (fig. 1). Thus, the emergency stop device 2 operates because the lift lever 21 (fig. 1) connected to the 2 nd working piece 18 is lifted.
Next, the return operation of electric power tool 10 will be described. In addition, when the electric work implement 10 is caused to perform the return operation, the supply of electric power to the elevator controller 6 is resumed in advance.
In order to return the electric power tool 10 from the operating state to the standby state shown in fig. 2, the movable element 34 is returned from the moving position (position P in fig. 2) to the standby position (fig. 2) by the mechanism sections (36, 37, 39, 41) and the electric device sections (6, 37, 112), as described below.
The electric power tool 10 has a feed screw 36 for driving the movable element 34. The feed screw 36 is coaxially connected to the rotation shaft of the restoring motor 37, and is rotatably supported by a support member 41. The electromagnets 35a and 35b are fixed to an electromagnet support plate 39 provided with a feed nut portion (not shown). The feed nut portion of the electromagnet support plate 39 is screwed with the feed screw 36. The feed screw 36 is rotated by a return motor 37. The restoration motor 37 is driven by a motor controller 112.
The motor controller 112 includes a drive circuit for the restoration motor 37, and controls the rotation of the restoration motor 37 in response to a control command from the elevator controller 6. The restoration motor 37 may be any of a DC motor and an AC motor.
The elevator controller 6 controls the normal operation of the car 1 and has information on the operation state of the car 1. In the present embodiment, as described above, the elevator controller 6 also has a function of controlling the restoration motor 37 provided in the electric power tool 10 and a function of confirming the operation of the restoration motor 37.
When the electric work implement 10 is returned to the standby state, the elevator controller 6 sends a rotation command of the return motor 37 to the motor controller 112. Upon receiving the rotation command, the motor controller 112 drives the restoration motor 37 to rotate the feed screw 36. The rotation of the restoring motor 37 is converted into linear movement of the electromagnets 35a and 35b along the axial direction of the feed screw 36 by the feed nut portion provided in the rotating feed screw 36 and the electromagnet support plate 39. As a result, the electromagnets 35a and 35b come close to the moving position P of the movable element 34 shown in fig. 2, and come into contact with the movable element 34.
The motor controller 112 monitors the motor current in order to control the restoration motor 37. As described above, when the electromagnets 35a and 35b come into contact with the movable element 34, the load of the restoring motor 37 increases, and thus the motor current increases. When the motor current increases and exceeds the given value, the motor controller 112 determines that the electromagnets 35a, 35b are in contact with the movable element 34. The motor controller 112 sends the determination result to the safety controller 103 and the elevator controller 6.
Upon receiving the determination result from the motor controller 112, the safety controller 103 outputs an on command to each of the electrical contacts 104a and 104 b. The electrical contacts 104a, 104b transition from the off state to the on state by an on command. Accordingly, the electromagnets 35a, 35b are excited. The attraction portion 34a in the movable element 34 is attracted to the electromagnets 35a and 35b by the electromagnetic force of the electromagnets 35a and 35b excited.
When receiving the above-described determination result from the motor controller 112, the elevator controller 6 sends a reverse instruction of the restoration motor 37 to the motor controller 112. Upon receiving the reversing instruction, the motor controller 112 reverses the rotation direction of the return motor 37 to reverse the feed screw 36. As a result, the movable element 34 attracted to the electromagnets 35a and 35b receives the urging force of the drive spring 13 and moves together with the electromagnets 35a and 35b to the standby position (fig. 2).
When the movable element 34 reaches the standby position, the movable element detection switch 109 is operated by the cam portion 34c provided in the movable element 34. When the movable element detection switch 109 is operated, the elevator controller 6 determines that the movable element 34 is located at the standby position. Based on the determination result, the elevator controller 6 sends a stop command for the restoration motor 37 to the motor controller 112. Upon receiving the stop command, the motor controller 112 stops the rotation of the restoration motor 37.
Instead of the movable element detection switch 109, other position detection sensors may be used, such as a photoelectric position sensor, a magnetic position sensor, and a proximity sensor (capacitive or inductive).
Fig. 3 is a schematic diagram showing an example of an image of the exposed surface of the guide rail 4 (fig. 1).
Fig. 3 shows an image I (t) at time t and an image I (t+Δt) at time t+Δt (Δt: frame period) obtained by the image sensor 3 (fig. 1 and 2). The image of the exposed surface of the steel material constituting the guide rail 4 shows a pattern showing the brightness distribution of the uneven distribution in the exposed surface of the steel material. In addition, the car 1 (fig. 1) descends between time t and time t+Δt.
As the car 1 moves, an image deviation d occurs between the image I (t) and the image I (t+Δt) as shown in fig. 3. In fig. 3, since the car 1 is lowered, the image frame is deviated in the upward direction by the image deviation d.
In the present embodiment, the image processing apparatus 90 (fig. 2) calculates the deviation d of the image by comparing the image I (t) and the image I (t+Δt) using the image correlation method. In this case, the image I (t) or a part thereof is moved by a predetermined amount in the image frame along the longitudinal direction of the guide rail 4, and the correlation function value between the moved image I (t) and the image I (t+Δt) is calculated. The total movement amount of the image I (t) in the case where the correlation function value becomes the maximum value is set as the deviation d of the image. The image processing device 90 calculates the speed v (=d/Δt) of the car from the deviation d of the image and the frame period.
In addition, in order to provide the surface with irregularities on the guide rail 4, it is preferable to perform surface finishing by polishing or the like. The image sensor 3 is preferably provided with a light source for illuminating the surface of the guide rail 4. Thereby, the accuracy of detecting the speed of the car 1 is improved.
Fig. 4 is a block diagram showing a functional configuration of the operation test device 200 in the present embodiment.
As shown in fig. 4, the operation test device 200 includes: an image display device 202 which is a subject of the image detected by the image sensor 3; and an image control device 201 for controlling playback of the moving image displayed on the image display device 202.
The image control device 201 displays a moving image in which a pattern simulating the surface state of the guide rail linearly flows in the display screen. The moving image data is stored in the storage unit 203. The driving section 204 drives the image display device 202 based on the moving image data stored in the storage section 203 in accordance with an image playback instruction from the control section 206. Thereby, the image control device 201 displays a moving image of a pattern simulating the surface state of the guide rail.
The moving image data is stored in the storage unit 203 in advance before the operation test of the cordless governor. In the present embodiment, the communication unit 205 downloads dynamic image data from the server device 301 provided in the control center 300 that monitors the operation states of a plurality of elevators, via the communication network 400, in response to a communication command from the control unit 206. The downloaded moving image data is stored in the storage unit 203.
The control unit 206 can change the playback speed of the moving image. This makes it possible to increase the pattern flow speed to the first excessive speed at which the power supply 60 is turned off, and further to the second excessive speed at which the emergency stop device 2 operates.
Fig. 5 is a view in the direction a and a front view in fig. 1 showing the external appearance of the operation test device 200 (fig. 1) of the cordless speed governor system according to the present embodiment.
The present embodiment uses a portable information terminal 210 such as a smart phone or a tablet terminal as the operation test device 200. The image display device 202 is constituted by a liquid crystal display provided in the portable information terminal 210.
When the portable information terminal 210 is operated, moving image data stored in the portable information terminal 210 is played back. At this time, the image control device 201 shown in fig. 5 displays a moving image in which a pattern simulating the surface state of the guide rail linearly flows along the lifting direction (up-down direction in fig. 5) of the car 1. By acquiring a moving image of such a pattern with the image sensor 3, the image processing device 90 (fig. 2) in the cordless governor system outputs a speed detection signal S 1.
In the present embodiment, by changing the playback speed of the moving image by operating the portable information terminal 210, the speed of the pattern flow can be increased to the first excessive speed at which the power supply 60 is turned off, and further to the second excessive speed at which the emergency stop device 2 operates.
Further, since the portable information terminal 210 is used as the operation test device 200, the operation test device 200 can be easily carried into a work place (for example, on a car) when the operation of the cordless governor system is tested. Further, when the operation test device 200 is attached to the guide rail 4, the test of the cordless speed governor system can be started quickly without performing an operation such as connection to a power source.
The portable information terminal 210 is accommodated in the housing 220. The display screen of the image display device 202 is exposed without being covered by the housing 220. The case 220 includes a permanent magnet 230 on a rear surface side facing the display screen. As shown in fig. 1, the operation test device 200 is detachably attached to the rail 4 containing steel material by the permanent magnet 230. At this time, the motion test device 200 is mounted on the guide rail 4 such that the display screen of the image display device 202 faces the image sensor 3 and the moving image of the pattern displayed on the display screen flows along the lifting direction of the car 1.
After the operation test device 200 is mounted on the guide rail 4 as described above, the portable information terminal 210 is operated to play back the moving image. By operating the portable information terminal 210, the speed of playback is increased, and the image sensor 3 detects a moving image displayed on the image display device 202, which is the object to be detected, to thereby detect the speed of the flow of the pattern in the moving image. This makes it possible to test the operation of the ropeless governor system while stopping the car 1.
Fig. 6 is a schematic diagram showing an example of a pattern simulating the surface state of the guide rail 4.
The pattern simulation shown in fig. 6 shows a pattern of the brightness distribution of the concave-convex distribution of the exposed surface of the steel material constituting the guide rail 4 (fig. 3). In the example of fig. 6, a plurality of rectangular or elongated patterns having different lengths and widths are irregularly distributed.
The pattern is not limited to a rectangular shape or a long shape, and may be a regular shape such as an oval shape. The pattern may be an irregularly shaped pattern, such as the pattern of the brightness distribution on the exposed surface of the guide rail 4 shown in fig. 3.
Fig. 7 is a flowchart showing a flow of operation test processing of the cordless speed governor system according to the present embodiment. In this embodiment, the maintenance technician performs the operation test process.
At the start time of the maintenance technician, the car 1 or the counterweight, not shown, is mechanically locked in the hoistway. Thereby, the car 1 maintains a stopped state. The operation mode of the elevator controller 6 is switched from the normal operation to the maintenance operation.
When the operation starts, in step S1, a maintenance technician gets onto the car 1.
Next, in step S2, the maintenance technician installs the operation test device 200 (portable information terminal 210) on the guide rail 4, and sets a maintenance subject (image display device 202).
Next, in step S3, the maintenance technician operates the operation test device 200 (portable information terminal 210) to start playback of the moving image.
Next, in step S4, the maintenance technician operates the operation test device 200 (portable information terminal 210) to increase the playback speed of the moving image.
Next, in step S5, the maintenance technician increases the playback speed of the moving image, and determines whether or not the cordless governor system detects the first overspeed. In the present embodiment, the maintenance technician confirms the state of the brake 82 of the hoisting machine 8, and if the brake 82 transitions from the released state to the braked state, the cordless governor system determines that the first overspeed is detected.
If the maintenance technician determines that the first overspeed is detected (yes in step S5), step S6 is executed next, and if the maintenance technician determines that the first overspeed is not detected (no in step S5), step S5 is executed again.
In step S6, the maintenance technician confirms the detected speed value of the first overspeed. At this time, for example, the maintenance technician reads a speed value shown by a speed display (for example, an LED display (2-system, 16-system, etc.)) provided in the image processing apparatus 90 or the safety controller 103.
Next, in step S7, the maintenance technician operates the operation test device 200 (portable information terminal 210) to further increase the playback speed of the moving image.
Next, in step S8, the maintenance technician increases the playback speed of the moving image, and determines whether the cordless governor system detects the second overspeed. In the present embodiment, the maintenance technician confirms whether or not the electric power tool 10 is operated to operate the emergency stop device 2, and determines that the cordless governor system detects the second overspeed when the electric power tool 10 is operated.
If the maintenance technician determines that the second overspeed is detected (yes in step S8), step S9 is next executed, and if the maintenance technician determines that the second overspeed is not detected (no in step S8), step S8 is executed again.
In step S9, the maintenance technician confirms the detected speed value of the second overspeed. At this time, for example, the maintenance technician reads the speed value indicated by the speed display provided in the image processing apparatus 90 or the safety controller 103 in the same manner as in step S6.
Next, in step S10, the maintenance technician operates the operation test device 200 (portable information terminal 210) to stop playback of the moving image.
Next, in step S11, the maintenance technician removes the operation test device 200 (portable information terminal 210) from the guide rail 4, and collects the object to be inspected for maintenance (image display device 202).
Next, in step S12, the maintenance technician resets the cordless speed regulator system, releasing the overspeed detection state.
Next, in step S13, the maintenance technician sets the cordless governor system to a return operation mode, and returns the electric work implement 10 to a normal state (fig. 2).
Next, in step S14, the maintenance technician gets down from the car 1, and ends the series of processing.
In steps S5 and S8, the maintenance technician may confirm the disconnection instruction signal outputted from the safety controller 103 instead of confirming the operation of the equipment. In this case, the maintenance technician confirms the detection of the first overspeed by confirming the disconnection command signal S 2 shown in fig. 2, and confirms the detection of the second overspeed by confirming the disconnection command signal S 3、S4 shown in fig. 2. These off command signals can be confirmed by a maintenance tool carried by a maintenance technician.
In steps S6 and S9, the maintenance technician may read the speed value based on the detected speed signal S 1 shown in fig. 2 instead of the display. In this case, the maintenance tool inputs the detected speed signal S 1, and calculates a speed value based on the detected speed signal S 1. The maintenance tool displays or records the calculated speed value.
The processing of steps S3 to S10 may be executed by a computer system provided in the maintenance tool. In this case, when the maintenance technician operates the maintenance tool to start execution of the process (step S3), the maintenance tool transmits a control command (playback speed command) to the operation test device 200 (portable information terminal 210), confirms detection of the first overspeed based on the disconnection command signal S 2 (fig. 2), and confirms detection of the second overspeed by confirming the disconnection command signal S 3、S4 (fig. 2). Further, the maintenance tool calculates the speed values of the first and second overspeed based on the detected speed signal S 1 (fig. 2).
According to the embodiment described above, by moving the pattern simulating the surface state of the guide rail 4 in the lifting direction of the car 1, the car 1 is not driven, and the speed of the car 1 is simulated based on the image of the pattern acquired by the image sensor 3. Therefore, the operation of the ropeless governor system can be tested in a state where the car 1 is stopped.
The present invention is not limited to the foregoing embodiments, and includes various modifications. For example, the foregoing embodiments have been described in detail for the purpose of easily understanding the present invention, but are not necessarily limited to the configuration having all the descriptions. In addition, deletion, and substitution of other structures can be performed on a part of the structure of the embodiment.
For example, the electric power tool 10 may be provided at a lower portion or a lateral portion of the car 1. In this case, the work place of the maintenance technician is appropriately set.
The elevator apparatus may have a machine room, or may be a so-called machine-room-less elevator without a machine room.
Description of the reference numerals
The elevator car, the emergency stop device, the 3 th image sensor, the 4 th guide rail, the 6 th elevator controller, the 8 th traction machine, the 10 th electric work machine, the 11 th operation control unit, the 12 th driving shaft, the 13 th driving spring, the 14 th fixing unit, the 15 th pressing member, the 16 th working sheet, the 17 th connecting sheet, the 18 th working sheet, the 19 th working shaft, the 20 th working shaft, the 21 th lifting rod, the 30 th electric work machine housing, the 34 th movable member, the 34a th adsorption unit, the 34b th supporting unit, the 34c th cam unit, the 35a, the 35b th electromagnet, the 36 th feeding screw, the 37 th restoring motor, the 38 th connecting bracket. Electromagnet support plate, 41..support member, 50..cross head, 60..power supply, 70..shutter, 81..traction motor, 82..brake, 90..image processing device, 103..safety controller, 104a, 104 b..electric contact, 109..movable piece detection switch, 111..dc power supply, 112..motor controller, 200..operation test device, 201..image control device, 202..image display device, 203..storage unit, 204..drive unit, 205..communication unit, 206..control unit, 210..portable information terminal, 220..housing, 230..permanent magnet, 300..control center, 301..server device, 400..communication network.
Claims (6)
1. An operation test method of a speed governor system for an elevator, wherein when an overspeed state of a car is detected based on an image of a surface of a guide rail obtained by an image sensor provided in the car, an operation of the speed governor system for operating an emergency stop device is tested,
The operation test method of the speed regulator system for the elevator is characterized in that,
And acquiring, by the image sensor, a moving image of a pattern that simulates a surface state of the guide rail and that flows along a lifting direction of the car.
2. The method for testing the operation of an elevator governor system according to claim 1, wherein,
The image sensor acquires the moving image of the pattern while the car is stopped.
3. An operation test device for an elevator governor system, which tests the operation of the governor system that operates an emergency stop device when the overspeed state of a car is detected based on an image of the surface of a guide rail obtained by an image sensor provided in the car,
The operation test device for an elevator governor system is characterized by comprising:
A subject which displays a moving image of a pattern which simulates the surface state of the guide rail and which flows along the lifting direction of the car,
The dynamic image is acquired by the image sensor.
4. The operation test device for an elevator governor system according to claim 3, wherein,
The moving image is acquired by the image sensor in a state where the car is stopped.
5. The operation test device for an elevator governor system according to claim 3, wherein,
The motion test device of the speed regulator system for the elevator is mounted on the guide rail.
6. The operation test device for an elevator governor system according to claim 3, wherein,
The object to be detected is an image display device,
The operation test device of the speed regulator system for the elevator comprises: and an image control device for controlling playback of the moving image displayed on the image display device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2021/040972 WO2023079734A1 (en) | 2021-11-08 | 2021-11-08 | Action testing method and action testing device of governor system for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118103317A true CN118103317A (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180103166.4A Pending CN118103317A (en) | 2021-11-08 | 2021-11-08 | Operation test method and operation test device for elevator governor system |
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| Country | Link |
|---|---|
| JP (1) | JPWO2023079734A1 (en) |
| CN (1) | CN118103317A (en) |
| WO (1) | WO2023079734A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20080089673A (en) * | 2005-01-04 | 2008-10-07 | 미쓰비시덴키 가부시키가이샤 | Mover position/speed detecting device |
| JP4589424B2 (en) * | 2008-06-18 | 2010-12-01 | 株式会社日立製作所 | Inspection system and inspection method for elevator safety device |
| JP7100515B2 (en) * | 2018-07-06 | 2022-07-13 | 株式会社日立製作所 | Elevator |
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2021
- 2021-11-08 JP JP2023557583A patent/JPWO2023079734A1/ja active Pending
- 2021-11-08 CN CN202180103166.4A patent/CN118103317A/en active Pending
- 2021-11-08 WO PCT/JP2021/040972 patent/WO2023079734A1/en active Application Filing
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| WO2023079734A1 (en) | 2023-05-11 |
| JPWO2023079734A1 (en) | 2023-05-11 |
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