WO2020217352A1

WO2020217352A1 - Slippage detection system for elevator

Info

Publication number: WO2020217352A1
Application number: PCT/JP2019/017481
Authority: WO
Inventors: 智史山崎; 力雄近藤; 木村　哲也
Original assignee: 三菱電機ビルテクノサービス株式会社; 三菱電機株式会社
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-10-29
Also published as: JPWO2020217352A1; CN113767059B; JP7047972B2; CN113767059A

Abstract

Provided is a slippage detection system that makes it possible to detect slippage of a main rope with higher accuracy. The slippage detection system (1) is provided with a rotation angle detection unit (16), a first detected body (18), a position detection unit (19), a storage unit (21), and a calculation unit (22). When a detection state is switched by the position detection unit (19) passing a first boundary of a first detection area as a result of travel of a car (8), the rotation angle of a hoist (7) detected by the rotation angle detection unit (16) is stored by the storage unit (21) as a first rotation angle. When the detection state is switched by the position detection unit (19) passing the first boundary of the first detection area as a result of travel of the car (8) after detection of the first rotation angle, the rotation angle of the hoist (7) detected by the rotation angle detection unit (16) is stored by the storage unit (21) as a second rotation angle. The calculation unit (22) uses the difference between the first rotation angle and the second rotation angle stored in the storage unit (21) as a basis to calculate the amount of slippage between a main rope (6) and a sheave (5).

Description

Elevator slip detection system

The present invention relates to an elevator slip detection system.

An example of an elevator system is described in Patent Document 1. The elevator system detects slippage of the main rope based on the signal of the pulse encoder output from the reference floor to the detection of the floor board of the predetermined floor.

Japanese Patent Application Laid-Open No. 2014-43291

However, in the elevator system described in Patent Document 1, the car runs from the reference floor. Therefore, there may be an error in the reference position of the car by the length of the floor board in the traveling direction of the car.

The present invention has been made to solve such a problem. An object of the present invention is to provide a slip detection system capable of detecting slip of a main rope with higher accuracy.

The slip detection system of the elevator according to the present invention has a rotation angle detection unit that detects the rotation angle of the hoisting machine that drives the main rope by the rotation of the rope wheel around which the main rope of the elevator is wound, and the rope wheel. The first body to be detected is fixed to the hoistway on which the balance weight provided on the other side of the main rope runs with respect to the car and the balance weight provided on one side of the main rope, and the cage or the balance weight is provided. Detected by the position detection unit whose detection state is switched depending on whether or not it is in the first detection area at the height of the first detected object, and by the position detection unit passing through the first boundary of the first detection area when the car is running. The rotation angle of the hoist detected by the rotation angle detection unit when the state is switched is stored as the first rotation angle, and after the first rotation angle is detected, the position detection unit passes through the first boundary due to the traveling of the car. As a result, the difference between the storage unit that stores the rotation angle of the hoist detected by the rotation angle detection unit when the detection state is switched as the second rotation angle and the first rotation angle and the second rotation angle stored by the storage unit. A calculation unit for calculating the amount of slip between the main rope and the rope wheel based on the main rope and the rope wheel is provided.

According to the present invention, the slip detection system includes a rotation angle detection unit, a first detected body, a position detection unit, a storage unit, and a calculation unit. The main rope of the elevator is wrapped around a sheave. The hoisting machine drives the main rope by the rotation of the sheave. The rotation angle detection unit detects the rotation angle of the hoisting machine. The car is provided on one side of the main rope with respect to the sheave. The counterweight is provided on the other side of the main rope with respect to the sheave. The first detected body is fixed to the hoistway on which the car and the counterweight run. The position detection unit is provided on the car or the counterweight. The position detection unit switches the detection state depending on whether or not it is in the first detection region at the height of the first detected body. The storage unit determines the rotation angle of the hoisting machine detected by the rotation angle detection unit when the detection state is switched by the position detection unit passing through the first boundary of the first detection area due to the traveling of the car. Remember as. The storage unit determines the rotation angle of the hoisting machine detected by the rotation angle detection unit when the detection state is switched by the position detection unit passing through the first boundary due to the traveling of the car after the first rotation angle is detected. It is stored as the second rotation angle. The calculation unit calculates the amount of slip between the main rope and the sheave based on the difference between the first rotation angle and the second rotation angle stored in the storage unit. As a result, the slip detection system can detect the slip of the main rope with higher accuracy.

It is a block diagram of the slip detection system which concerns on Embodiment 1. FIG. It is a block diagram of the main part of the slip detection system which concerns on Embodiment 1. FIG. It is a figure which shows the example of the slip detection by the slip detection system which concerns on Embodiment 1. FIG. It is a flowchart which shows the example of the operation of the slip detection system which concerns on Embodiment 1. It is a flowchart which shows the example of the operation of the slip detection system which concerns on Embodiment 1. It is a figure which shows the hardware configuration of the main part of the slip detection system which concerns on Embodiment 1. FIG. It is a figure which shows the example of the slip detection by the slip detection system which concerns on Embodiment 2. It is a figure which shows the example of the slip detection by the slip detection system which concerns on Embodiment 3.

The embodiment for carrying out the present invention will be described with reference to the attached drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and duplicate description will be appropriately simplified or omitted.

Embodiment 1.
FIG. 1 is a configuration diagram of a slip detection system according to the first embodiment.

FIG. 1 shows an elevator 2 equipped with a slip detection system 1. The elevator 2 is provided in a building having a plurality of floors. In this example, the bottom floor of the building is the first floor. In this example, the top floor of the building is the third floor. The building has a second floor between the first and third floors. In a building, the hoistway 3 of the elevator 2 penetrates each of a plurality of floors. In the building, the landing 4 of the elevator 2 is provided on each of a plurality of floors. The landing 4 leads to the hoistway 3 by the landing entrance / exit. The landing entrance / exit is an opening connecting the landing 4 and the hoistway 3.

The elevator 2 includes a sheave 5, a main rope 6, a hoisting machine 7, a car 8, a counterweight 9, a plurality of landing doors 10, a brake 11, a speed governor 12, and a control panel 13. , Equipped with. The sheave 5 is a sheave provided coaxially with the hoisting machine 7. The main rope 6 is wound around the sheave 5. The hoisting machine 7 is provided, for example, at the upper part or the lower part of the hoistway 3. The hoisting machine 7 is a device that drives the main rope 6 by the rotation of the sheave 5. The car 8 is provided on one side of the main rope 6 with respect to the sheave 5 in the hoistway 3. The counterweight 9 is provided on the other side of the main rope 6 with respect to the sheave 5 in the hoistway 3. The car 8 is a device for transporting a user or the like between a plurality of floors of a building by traveling in a vertical direction on a hoistway 3 following a main rope 6 driven by a hoisting machine 7. The car 8 includes a car door 14. The car door 14 is a device that opens and closes the car 8 so that when the car 8 is stopped on any of a plurality of floors, the user can get on and off the car 8 from the landing 4 on the floor. The counterweight 9 is a device that balances the load of the car 8 on the sheave 5 through the main rope 6. The counterweight 9 follows the main rope 6 driven by the hoisting machine 7 and travels on the hoistway 3 in the opposite direction of the car 8. Each of the plurality of landing doors 10 is provided at each landing entrance / exit on the plurality of floors. The landing door 10 is a device that opens and closes in conjunction with the car door 14 so that the user can get on and off the car 8. The brake 11 is a device that brakes the running of the car 8. The brake 11 is provided on the hoisting machine 7. The speed governor 12 is a device that limits the traveling speed of the car 8. The control panel 13 is provided, for example, at the upper or lower part of the hoistway 3. The control panel 13 is a device that controls the operation of the elevator 2. The operation of the elevator 2 includes, for example, traveling of the car 8, opening and closing of the car door 14, and operation of the brake 11.

In the elevator 2, the remote control device 15 is connected to the control panel 13. The remote control device 15 is a device that outputs an operation command to the control panel 13. The command output by the remote control device 15 includes, for example, a command for performing normal operation, a command for performing diagnostic operation, and the like. Here, the normal operation is the normal operation of the elevator 2 for transporting a user or the like between a plurality of floors of a building. The stop position of the car 8 in normal operation is any position of a plurality of floors. Each of the plurality of floors is an example of the stop floor of the elevator 2. The diagnostic operation is an operation for automatically diagnosing the state of the elevator 2. The stop position of the car 8 in the diagnostic operation may be an arbitrary position in the hoistway 3.

The slip detection system 1 of the elevator 2 includes an encoder 16, a measuring device 17, a plurality of floor boards 18, a landing sensor 19, and an information processing device 20.

The encoder 16 is a device that detects the rotation angle of the hoisting machine 7. The encoder 16 is an example of a rotation angle detection unit. The encoder 16 is provided on the hoisting machine 7.

The scale device 17 is a device for measuring the load weight of the car 8. The weighing device 17 is provided, for example, on the upper part of the car 8.

Each of the plurality of floor boards 18 is fixed to the hoistway 3. Each of the plurality of floor boards 18 is an example of the first detected body or the second detected body. Each of the plurality of floor boards 18 is provided below the landing entrance / exit, for example, in each of the plurality of floors of the building.

The landing sensor 19 is provided in the car 8. The landing sensor 19 is provided, for example, at the lower part of the car 8. The landing sensor 19 is an example of a position detection unit. The landing sensor 19 is a device that detects that the car 8 is stopped on any of a plurality of floors.

The information processing device 20 is a device that processes information related to slip detection. The information processing device 20 is provided, for example, at the upper or lower part of the hoistway 3. The information processing device 20 is connected to the control panel 13. The information processing device 20 includes a storage unit 21, a calculation unit 22, a determination unit 23, and a command unit 24.

The storage unit 21 is a part that stores information related to slip detection. The information stored in the storage unit 21 includes the rotation angle of the hoisting machine 7. The storage unit 21 acquires, for example, the rotation angle of the hoisting machine 7 detected by the encoder 16.

The calculation unit 22 is a part that calculates information related to slip detection. The information calculated by the calculation unit 22 includes the amount of slip between the main rope 6 and the sheave 5. The calculation unit 22 calculates the slip amount based on, for example, the rotation angle of the hoisting machine 7 stored in the storage unit 21.

The determination unit 23 is a unit that determines the slip abnormality detected based on the information calculated by the calculation unit 22.

The command unit 24 is a part that outputs an operation command related to slip detection. The command unit 24 causes the elevator 2 to perform an operation related to slip detection by, for example, outputting a command to the control panel 13.

FIG. 2 is a block diagram of a main part of the slip detection system according to the first embodiment.
In FIG. 2, a car 8 in a state of being stopped on one of a plurality of floors is shown. In FIG. 2, the left-right direction of the car 8 is a direction perpendicular to the paper surface.

The floor plate 18 is, for example, a metal plate. In this example, the floor board 18 is oriented in the horizontal direction in the thickness direction. The floor board 18 is oriented in the thickness direction in the left-right direction of the car 8. The floor board 18 is arranged outside, for example, in the left-right direction from the outer surface of the car 8 so as not to interfere with the car 8 traveling on the hoistway 3.

The landing sensor 19 includes, for example, an electromagnetic proximity sensor that detects the proximity of the floor board 18. The landing sensor 19 has a detection state. In this example, the detection state of the landing sensor 19 is an ON state or an OFF state. The detection state of the landing sensor 19 is ON when the landing sensor 19 is in the detection area. The detection state of the landing sensor 19 is ON when the landing sensor 19 is not in the detection area. The detection area is the area at the height of the floor board 18. The detection area is, for example, the landing range of the floor on which the floor board 18 is provided. The detection area is, for example, an area between the upper end of the floor board 18 and the lower end of the floor board 18. At this time, the boundary of the detection area is a position corresponding to the height of the upper end or the lower end of the floor board 18. The detection state of the landing sensor 19 is switched when the landing sensor 19 passes through the boundary of the detection area. The detection state is switched between an ON state and an OFF state.

Subsequently, the function of the slip detection system 1 will be described with reference to FIG.
FIG. 3 is a diagram showing an example of slip detection by the slip detection system according to the first embodiment.
In FIG. 3, the horizontal axis of the graph represents time. In FIG. 3, the vertical axis of the graph represents the position of the car 8.

The remote control device 15 outputs a command for performing diagnostic operation to the control panel 13. The elevator 2 starts the diagnostic operation. As part of the diagnostic operation, the elevator 2 performs a slip detection operation. FIG. 3 shows the movement of the car 8 in the slip detection operation. For example, when the slip detection operation is started, the control panel 13 notifies the information processing device 20 of the start of the slip detection operation. Alternatively, the remote control device 15 may output a command to start the slip detection operation to the information processing device 20.

The command unit 24 of the information processing device 20 outputs a slip detection operation command to the control panel 13. The command unit 24 outputs a command to the control panel 13 to keep the car door 14 closed while the slip detection operation is being performed. The control panel 13 keeps the car door 14 closed during the slip detection operation according to the input command. The control panel 13 causes the car 8 to perform the operation related to the slip detection operation according to, for example, a command input from the command unit 24.

In this example, the car 8 is stopped on the first floor at the start of the slip detection operation. In the slip detection operation, the car 8 continuously travels from the first floor to the third floor. After that, the car 8 runs continuously from the 3rd floor to the 1st floor. After that, the car 8 runs from the first floor to the second floor. Here, the first floor is an example of the first stop floor. The floor board 18 on the first floor is an example of the first detected object. The height detection area of the floor board 18 on the first floor is an example of the first detection area. The boundary of the detection area corresponding to the height of the upper end of the floor board 18 on the first floor is an example of the first boundary. The third floor is an example of the second stop floor. The floor board 18 on the third floor is an example of the second detected object. The height detection area of the floor board 18 on the third floor is an example of the second detection area. The boundary of the detection area corresponding to the height of the lower end of the floor board 18 on the third floor is an example of the second boundary.

The information processing device 20 detects slippage of the elevator 2 as follows, for example.

At point a, the car 8 starts running ascending from the 1st floor to the 3rd floor. At point b, the landing sensor 19 passes through the boundary of the detection area corresponding to the height of the upper end of the floor board 18 on the first floor. The storage unit 21 stores the rotation angle θ1 of the hoisting machine 7 detected by the encoder 16 at this time as the first rotation angle.

At point c, car 8 stops running on the 3rd floor. The car 8 stopped at the d point then starts traveling in which the traveling direction is reversed from ascending to descending at the e point. Here, the position of the car 8 at point d is a position above the boundary of the detection area corresponding to the height of the upper end of the floor board 18 on the first floor. The position of the car 8 at point d is an example of the first inverted position.

At point f, the car 8 stops running on the first floor. The car 8 stopped at the g point then starts traveling at the h point with the traveling direction reversed from descending to ascending. Here, the position of the car 8 at the point g is a position below the boundary of the detection area corresponding to the height of the upper end of the floor board 18 on the first floor. The position of the car 8 at point g is an example of the second inverted position. After that, at point i, the landing sensor 19 passes through the boundary of the detection region corresponding to the height of the upper end of the floor board 18 on the first floor. The storage unit 21 stores the rotation angle θ2 of the hoisting machine 7 detected by the encoder 16 at this time as the second rotation angle.

At point j, the car 8 stops running on the second floor.

After that, the calculation unit 22 calculates the amount of slip between the main rope 6 and the sheave 5 based on the difference between the first rotation angle and the second rotation angle. For example, the calculation unit 22 may use the difference between the first rotation angle and the second rotation angle as the amount of slip between the main rope 6 and the sheave 5.

The command unit 24 outputs a command for displaying the calculated slip amount to, for example, the control panel 13. The control panel 13 displays, for example, a slip amount on a display device of an elevator 2 (not shown). The display device of the elevator 2 is, for example, a display unit of the control panel 13, a car display panel, a landing display panel, or the like. The command unit 24 may output a command for notifying the slip amount to the remote control device 15. The remote control device 15 notifies, for example, the manager of the elevator 2 in a remote place of the slip amount.

When the calculated slip amount exceeds the threshold value, the determination unit 23 determines that the slip diagnosis result is abnormal. When the calculated slip amount does not exceed the threshold value, the determination unit 23 determines that the slip diagnosis result is normal. Here, even when there is no slip between the main rope 6 and the sheave 5, the extension of the main rope 6 due to the difference in weight between the car 8 and the counterweight 9 causes the distance between the first rotation angle and the second rotation angle. Can make a difference. Therefore, the threshold value of the slip amount is set in advance as a value larger than the difference in the rotation angle that can be caused by the elongation of the main rope 6 due to the difference in weight between the car 8 and the counterweight 9.

The command unit 24 outputs a command for displaying the determined slip diagnosis result to, for example, the control panel 13. The command unit 24 may output a command for notifying the determined slip diagnosis result to, for example, the remote control device 15.

Subsequently, an example of the operation of the slip detection system 1 will be described with reference to FIGS. 4 and 5.
4 and 5 are flowcharts showing an example of the operation of the slip detection system according to the first embodiment.

FIG. 4 shows an example of the operation of the slip detection system 1 related to the entire slip detection.

In step S1, the slip detection system 1 calculates the slip amount. After that, the operation of the slip detection system 1 proceeds to step S2.

In step S2, the command unit 24 outputs a command for displaying the calculated slip amount. After that, the operation of the slip detection system 1 proceeds to step S3.

In step S3, the determination unit 23 determines whether the calculated slip amount exceeds the threshold value. When the determination result is Yes, the operation of the slip detection system 1 proceeds to step S4. When the determination result is No, the operation of the slip detection system 1 proceeds to step S5.

In step S4, the determination unit 23 determines that the slip diagnosis result is abnormal. After that, the operation of the slip detection system 1 proceeds to step S6.

In step S5, the determination unit 23 determines that the slip diagnosis result is normal. After that, the operation of the slip detection system 1 proceeds to step S6.

In step S6, the command unit 24 outputs a command for displaying the determined diagnosis result. After that, the operation of the slip detection system 1 ends.

FIG. 5 shows an example of the operation of the slip detection system 1 related to the calculation of the slip amount.

In step S11, the command unit 24 outputs a command to start the running of the car 8 stopped on the first stop floor. After that, the operation of the slip detection system 1 related to the calculation of the slip amount proceeds to step S12.

In step S12, the storage unit 21 stores, for example, the first rotation angle detected by the encoder 16. After that, the operation of the slip detection system 1 related to the calculation of the slip amount proceeds to step S13.

In step S13, the command unit 24 outputs a command to stop the car 8 on the second stop floor. After that, the operation of the slip detection system 1 related to the calculation of the slip amount proceeds to step S14.

In step S14, the command unit 24 outputs a command to the car 8 stopped on the second stop floor to start running with the running direction reversed. After that, the operation of the slip detection system 1 related to the calculation of the slip amount proceeds to step S15.

In step S15, the command unit 24 outputs a command to stop the car 8 on the first stop floor. After that, the operation of the slip detection system 1 related to the calculation of the slip amount proceeds to step S16.

In step S16, the command unit 24 outputs a command to the car 8 stopped on the first stop floor to start running with the running direction reversed. After that, the operation of the slip detection system 1 related to the calculation of the slip amount proceeds to step S17.

In step S17, the storage unit 21 stores, for example, the second rotation angle detected by the encoder 16. After that, the operation of the slip detection system 1 related to the calculation of the slip amount proceeds to step S18.

In step S18, the command unit 24 outputs a command to stop the car 8. After that, the operation of the slip detection system 1 related to the calculation of the slip amount ends.

As described above, the slip detection system 1 includes a rotation angle detection unit, a first detected body, a position detection unit, a storage unit 21, and a calculation unit 22. The main rope 6 of the elevator 2 is wound around the sheave 5. The hoisting machine 7 drives the main rope 6 by the rotation of the sheave 5. The rotation angle detection unit detects the rotation angle of the hoisting machine 7. The car 8 is provided on one side of the main rope 6 with respect to the sheave 5. The counterweight 9 is provided on the other side of the main rope 6 with respect to the sheave 5. The first detected body is fixed to the hoistway 3 on which the car 8 and the counterweight 9 travel. The position detection unit is provided in the car 8. The position detection unit switches the detection state depending on whether or not it is in the first detection region at the height of the first detected body. The storage unit 21 sets the rotation angle of the hoisting machine 7 detected by the rotation angle detection unit when the detection state is switched by the position detection unit passing through the first boundary of the first detection region due to the traveling of the car 8. Store as one rotation angle. The storage unit 21 rotates the hoisting machine 7 detected by the rotation angle detection unit when the detection state is switched by the position detection unit passing through the first boundary due to the traveling of the car 8 after the first rotation angle is detected. The angle is stored as the second rotation angle. The calculation unit 22 calculates the amount of slip between the main rope 6 and the sheave 5 based on the difference between the first rotation angle and the second rotation angle stored by the storage unit 21.

The first rotation angle and the second rotation angle are rotation angles detected at the boundary of the detection area. The boundary of the detection area has no length in the traveling direction of the car 8. Therefore, the slip detection system 1 can acquire the first rotation angle and the second rotation angle used for slip detection with high accuracy. The position of the position detection unit when the first rotation angle is detected is the same as the position of the position detection unit when the second rotation angle is detected. Therefore, the difference between the first rotation angle and the second rotation angle directly reflects the slip between the main rope 6 and the sheave 5. As a result, the slip detection system 1 can detect the slip of the main rope 6 with higher accuracy. Further, the slip detection system 1 calculates the slip amount using a single object to be detected. Therefore, the slip detection system 1 is not affected by the relative difference in the installation state between the plurality of objects to be detected in the calculation of the slip amount.

Further, the calculation unit 22 is based on the difference between the first rotation angle detected when the elevator 2 is performing the diagnostic operation and the second rotation angle detected when the elevator 2 is performing the diagnostic operation. To calculate the amount of slip.

In the diagnostic operation, the elevator 2 is not used by the user. Therefore, in calculating the slip amount, there is no uncertainty due to the usage status of the user.

Further, in the calculation unit 22, the first rotation angle detected when the car 8 continuously travels from the first stop floor to the second stop floor, and the car 8 continuously runs from the first stop floor to the second stop floor. The slip amount is calculated based on the difference of the second rotation angle detected during the running.

The slip amount is calculated under the same conditions as the conditions such as the running speed of the car 8 when detecting the first rotation angle and the conditions such as the running speed of the car 8 when detecting the second rotation angle. Therefore, even when the detection by the position detection unit depends on the traveling speed of the car 8, the error due to the difference in the traveling speed of the car 8 can be suppressed in the calculation of the slip amount.

Further, in the calculation unit 22, the first rotation angle detected when the car 8 continuously travels between the lowest floor and the top floor, and the car 8 continuously runs between the lowest floor and the top floor. The slip amount is calculated based on the difference in the second rotation angle detected during traveling.

The amount of slip is calculated under the condition that the distance traveled by the car 8 continuously is the longest. The longer the mileage of the car 8, the longer the length of the main rope 6 driven by the sheave 5. At this time, the absolute value of the slip amount becomes large. Therefore, the calculation unit 22 can calculate the slip amount with higher accuracy.

Further, the calculation unit 22 detects the first rotation angle detected when the car 8 is traveling in either the ascending or descending traveling direction, and is detected when the car 8 is traveling in the traveling direction. The slip amount is calculated based on the difference in the second rotation angle.

The slip amount is calculated assuming that the traveling direction of the car 8 when detecting the first rotation angle and the traveling direction of the car 8 when detecting the second rotation angle are the same. Therefore, even when the detection by the position detection unit depends on the traveling direction of the car 8, the error due to the difference in the traveling direction of the car 8 can be suppressed in the calculation of the slip amount.

Further, the calculation unit 22 calculates the slip amount based on the difference between the first rotation angle and the second rotation angle detected after the traveling direction of the car 8 is reversed exactly twice after the first rotation angle is detected. To do.

The car 8 that does not move in a circular manner requires two or more reversals of the traveling direction in order to pass through the same position of the hoistway 3 in the same traveling direction. Therefore, the slip detection system 1 can minimize the reversal of the traveling direction in order to suppress an error due to a difference in the traveling direction of the car 8 in calculating the slip amount.

Further, the slip detection system 1 includes a command unit 24. The command unit 24 outputs a command for keeping the car door 14 of the car 8 closed from the time when the first rotation angle is detected until the second rotation angle is detected.

The user or maintenance staff does not get inside the car 8 while the car 8 is running in the slip detection. Therefore, the change in the load weight of the car 8 during the running of the car 8 in the slip detection is prevented.

Further, the slip detection system 1 includes a determination unit 23. The determination unit 23 determines as an abnormality when the slip amount calculated by the calculation unit 22 exceeds a preset threshold value.

The slip detection system 1 can determine that the decrease in traction is abnormal depending on the amount of slip. Here, the decrease in traction is caused by, for example, wear of the groove of the sheave 5 and adhesion of foreign matter to the main rope 6.

The calculation unit 22 slips the amount of slip based on the difference between the first rotation angle and the second rotation angle detected after the traveling direction of the car 8 is reversed between the stop floors after the first rotation angle is detected. May be calculated. For example, at least one of the first rotation angle and the second rotation angle is the rotation angle detected when the car 8 travels from the position between the first floor and the second floor to the position between the second floor and the third floor. You may.

This allows the mileage of the car 8 to be set regardless of the height of the floor. Therefore, the slip detection system 1 can detect local slip of the main rope 6, for example. At this time, the slip detection system 1 can be used to identify a location where slip occurs, for example, in the main rope 6.

Further, the rotation angle detection unit may be another device of the encoder 16. The rotation angle detection unit may be a device that detects the rotation angle by, for example, observing the feed amount of the main rope 6. The rotation angle detection unit may be a device that calculates the rotation angle from the current value of the hoisting machine 7.

Further, the detected object and the position detecting unit may be other devices of the floor board 18 and the landing sensor 19. The position detection unit may be a device that detects an object to be detected based on, for example, an optical type, a capacitance type, an ultrasonic type, or another principle. The object to be detected may be provided at a position between adjacent floors. At this time, the slip detection system 1 can detect the slip amount by running the car 8 between adjacent floors. Further, the position detection unit may be provided on the balance weight 9.

Further, a part or all of the information processing device 20 may be provided in hardware integrated with the control panel 13. A part or all of the information processing device 20 may be provided in hardware integrated with the remote control device 15. Some or all of the functions of the information processing device 20 may be realized by, for example, the control panel 13 or the remote control device 15.

Further, in the elevator 2, a machine room may be provided in the building. At this time, for example, the hoisting machine 7, the control panel 13, and the information processing device 20 may be provided in the machine room. Further, the elevator 2 may be a 1: 1 roping, 2: 1 roping, or other roping elevator.

Subsequently, an example of the hardware configuration of the slip detection system 1 will be described with reference to FIG.
FIG. 6 is a diagram showing a hardware configuration of a main part of the slip detection system according to the first embodiment.

Each function of the slip detection system 1 can be realized by a processing circuit. The processing circuit includes at least one processor 1b and at least one memory 1c. The processing circuit may include at least one dedicated hardware 1a with or as a substitute for the processor 1b and the memory 1c.

When the processing circuit includes the processor 1b and the memory 1c, each function of the slip detection system 1 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. The program is stored in the memory 1c. The processor 1b realizes each function of the slip detection system 1 by reading and executing the program stored in the memory 1c.

The processor 1b is also referred to as a CPU (Central Processing Unit), a processing device, an arithmetic unit, a microprocessor, a microcomputer, and a DSP. The memory 1c is composed of, for example, a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.

When the processing circuit is provided with dedicated hardware 1a, the processing circuit is realized by, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

Each function of the slip detection system 1 can be realized by a processing circuit. Alternatively, each function of the slip detection system 1 can be collectively realized by a processing circuit. For each function of the slip detection system 1, a part may be realized by the dedicated hardware 1a, and the other part may be realized by software or firmware. In this way, the processing circuit realizes each function of the slip detection system 1 by hardware 1a, software, firmware, or a combination thereof.

Embodiment 2.
In the second embodiment, the differences from the examples disclosed in the first embodiment will be described in detail. As for the features not described in the second embodiment, any of the features of the examples disclosed in the first embodiment may be adopted.

FIG. 7 is a diagram showing an example of slip detection by the slip detection system according to the second embodiment.
In FIG. 7, the horizontal axis of the graph represents time. In FIG. 7, the vertical axis of the graph represents the position of the car 8.

In this example, the slip detection system 1 detects slip when the elevator 2 is in normal operation. The slip detection system 1 causes the elevator 2 to perform a slip detection operation, for example, when it is determined that the user is not in the car 8. At this time, the slip detection system 1 determines whether or not the user is in the car 8 based on, for example, the load weight of the car 8 measured by the weighing device 17. Alternatively, the slip detection system 1 may determine whether or not the user is in the car 8 based on, for example, an image taken by a camera provided in the car 8.

In this example, the car 8 runs in the same manner as the example shown in the first embodiment. The information processing device 20 detects slippage of the elevator 2 as follows, for example.

While the car 8 rises between the first floor and the third floor, at point k, the landing sensor 19 passes through the boundary of the detection area corresponding to the height of the lower end of the floor board 18 on the second floor. The storage unit 21 stores the rotation angle φ1 of the hoisting machine 7 detected by the encoder 16 at this time as the first rotation angle.

After that, when the car 8 stops on the second floor, at point l, the landing sensor 19 passes through the boundary of the detection area corresponding to the height of the lower end of the floor board 18 on the second floor. The storage unit 21 stores the rotation angle φ2 of the hoisting machine 7 detected by the encoder 16 at this time as the second rotation angle.

After that, the calculation unit 22 calculates the slip amount based on the difference between the first rotation angle and the second rotation angle.

From the detection of the first rotation angle to the detection of the second rotation angle, the scale device 17 monitors whether the fluctuation of the loaded weight being measured is within a preset range. The range of fluctuation of the load weight is set to a range smaller than the fluctuation of the load weight when the user gets on and off the car 8, for example. Alternatively, the range of variation in the load weight may be set to a range in which the influence on the amount of slip between the main rope 6 and the sheave 5 can be ignored, for example. When the fluctuation of the load weight exceeds a preset range, the scale device 17 notifies the information processing device 20 of the fluctuation of the load weight. At this time, the information processing device 20 stops calculating the slip amount.

As described above, the slip detection system 1 according to the second embodiment includes a scale device 17. The scale device 17 measures the load weight of the car 8. The calculation unit 22 slips when the fluctuation of the load weight measured by the weighing device 17 is within a preset range between the detection of the first rotation angle and the detection of the second rotation angle. Is calculated.

The amount of slip between the main rope 6 and the sheave 5 changes depending on the load weight of the car 8. The calculation unit 22 calculates the slip amount when the change in the load weight is small during the operation for calculating the slip amount. This prevents the occurrence of an error in the amount of slippage due to a change in the load weight of the car 8.

The first rotation angle and the second rotation angle may be rotation angles detected when the car 8 travels in different sections on the hoistway 3. For example, when the landing call operation is performed during the operation for calculating the slip amount, the slip detection system 1 may stop the operation. At this time, the calculation unit 22 can calculate the slip amount by using, for example, the information on the rotation angle that has already been acquired. As a result, the slip detection system 1 can calculate the slip amount on more occasions.

Embodiment 3.
In the third embodiment, the differences from the examples disclosed in the first embodiment or the second embodiment will be described in detail. As for the features not described in the third embodiment, any of the features of the examples disclosed in the first embodiment or the second embodiment may be adopted.

FIG. 8 is a diagram showing an example of slip detection by the slip detection system according to the third embodiment.
In FIG. 8, the horizontal axis of the graph represents time. In FIG. 8, the vertical axis of the graph represents the position of the car 8.

The first rotation angle is detected at point b.

After that, while the car 8 ascends between the first floor and the third floor, at the m point, the landing sensor 19 passes through the boundary of the detection area corresponding to the height of the lower end of the floor board 18 on the third floor. The storage unit 21 stores the rotation angle θ3 of the hoisting machine 7 detected by the encoder 16 at this time as the third rotation angle.

After that, the second rotation angle is detected at point i.

After that, the calculation unit 22 calculates the slip amount based on the difference between the first rotation angle and the second rotation angle. The calculation unit 22 calculates the reference mileage. The reference mileage is the distance that the car 8 travels on the hoistway 3 in detecting the amount of slippage. The calculation unit 22 calculates the reference mileage based on, for example, the difference between the first rotation angle and the third rotation angle. Alternatively, the calculation unit 22 may calculate the reference mileage based on the difference between the second rotation angle and the third rotation angle. Alternatively, the calculation unit 22 may calculate the reference mileage based on the difference between the average value of the first rotation angle and the second rotation angle and the third rotation angle. The calculation unit 22 calculates the ratio of the slip amount divided by the reference mileage.

When the calculated ratio exceeds the threshold value, the determination unit 23 determines that the slip diagnosis result is abnormal. When the calculated ratio does not exceed the threshold value, the determination unit 23 determines that the slip diagnosis result is normal. Here, the threshold value of the ratio obtained by dividing the slip amount by the reference mileage is preset as a value larger than the value due to the difference in the rotation angle that can be caused by the elongation of the main rope 6 due to the difference in weight between the car 8 and the counterweight 9. ..

As described above, the slip detection system 1 according to the third embodiment includes a determination unit 23. The determination unit 23 determines as an abnormality when the ratio of the slip amount to the reference mileage exceeds a preset threshold value. The reference mileage is the distance that the car 8 travels on the hoistway 3 in detecting the amount of slippage. The calculation unit 22 calculates the ratio by dividing the slip amount by the reference mileage.

The difference between the first rotation angle and the second rotation angle depends on the distance traveled by the car 8. Here, when the mileage of the car 8 is long, the difference between the first rotation angle and the second rotation angle regardless of slippage also becomes large. Even in this case, since the diagnosis result is determined by the ratio of the difference between the first rotation angle and the second rotation angle standardized by the reference mileage, it is possible to prevent an erroneous diagnosis of an abnormality.

Further, the slip detection system 1 includes a second detected body. The second detected body is fixed above or below the first detected body in the hoistway 3. The position detection unit switches the detection state depending on whether or not it is in the second detection region at the height of the second detected body. The storage unit 21 switches the detection state when the position detection unit passes through the second boundary of the second detection region due to the traveling of the car 8 after the first rotation angle is detected and before the second rotation angle is detected. The rotation angle of the hoisting machine 7 sometimes detected by the rotation angle detection unit is stored as a third rotation angle. The calculation unit 22 calculates the distance between the first boundary and the second boundary as the reference mileage based on the first rotation angle or the second rotation angle and the third rotation angle.

The reference mileage is measured by the running of the car 8 in slip detection. Therefore, the calculation unit 22 can easily calculate the ratio of the slip amount standardized by the reference mileage. The reference mileage can be set sufficiently large with respect to the amount of slippage. Therefore, with respect to the reference mileage itself used for standardization, the relative fluctuation due to slippage can be reduced. Here, the reference mileage may be calculated by doubling the distance between the first boundary and the second boundary in consideration of the round trip of the car 8 in the hoistway 3.

Note that the information processing device 20 may detect slippage of the elevator 2 as follows, for example.

The first rotation angle is detected at point b.

After that, the car 8 reverses the traveling direction at the d point. The storage unit 21 stores the rotation angle θ4 of the hoisting machine 7 detected by the encoder 16 at the d point as the fourth rotation angle. Here, the rotation angle θ4 is, for example, a rotation angle when the increase and decrease of the count of the encoder 16 are reversed.

After that, the car 8 reverses the traveling direction again at the g point. The storage unit 21 stores the rotation angle θ5 of the hoisting machine 7 detected by the encoder 16 at the g point as the fifth rotation angle. Here, the rotation angle θ5 is, for example, a rotation angle when the decrease and increase of the count of the encoder 16 are reversed.

After that, the second rotation angle is detected at point i.

After that, the calculation unit 22 calculates the slip amount based on the difference between the first rotation angle and the second rotation angle. The calculation unit 22 calculates the reference mileage based on, for example, the difference between the fourth rotation angle and the fifth rotation angle. The calculation unit 22 calculates the ratio of the slip amount divided by the reference mileage.

When the calculated ratio exceeds the threshold value, the determination unit 23 determines that the slip diagnosis result is abnormal. When the calculated ratio does not exceed the threshold value, the determination unit 23 determines that the slip diagnosis result is normal.

As described above, the storage unit 21 determines the rotation angle of the hoisting machine 7 detected by the rotation angle detection unit when the traveling direction of the car 8 is reversed at the first inversion position after the first rotation angle is detected. Store as 4 rotation angles. The storage unit 21 is a hoisting machine 7 detected by the rotation angle detection unit when the traveling direction of the car 8 is reversed at the second inversion position after the fourth rotation angle is detected and before the second rotation angle is detected. The rotation angle of is stored as the fifth rotation angle. The first inversion position is a position on one side of the first boundary. The second inversion position is the position on the other side of the first boundary. The calculation unit 22 calculates the distance between the first reversing position and the second reversing position as a reference traveling distance based on the fourth rotation angle and the fifth rotation angle.

The reference mileage is calculated by the position where the traveling direction of the car 8 is reversed. At the inverted position, the car 8 temporarily stops. Therefore, in calculating the reference mileage, there is no error due to the traveling speed of the car 8. As a result, the calculation unit 22 can calculate the ratio of the difference between the first rotation angle and the second rotation angle standardized by the reference mileage with higher accuracy.

The slip detection system according to the present invention can be applied to an elevator.

1 slip detection system, 2 elevator, 3 hoistway, 4 landing, 5 rope wheel, 6 main rope, 7 hoisting machine, 8 car, 9 balance weight, 10 landing door, 11 brake, 12 speed control device, 13 control panel , 14 car door, 15 remote operation device, 16 encoder, 17 scale device, 18 floor board, 19 landing sensor, 20 information processing device, 21 storage unit, 22 calculation unit, 23 judgment unit, 24 command unit, 1a hardware , 1b processor, 1c memory

Claims

A rotation angle detection unit that detects the rotation angle of the hoist that drives the main rope by the rotation of the sheave around which the main rope of the elevator is wound.
A car provided on one side of the main rope with respect to the sheave and a first detected body fixed to a hoistway on which a balance weight provided on the other side of the main rope with respect to the sheave travels.
A position detection unit provided on the car or the counterweight and whose detection state is switched depending on whether or not it is in the first detection region at the height of the first detected body.
When the position detection unit passes the first boundary of the first detection region due to the traveling of the car and the detection state is switched, the rotation angle detection unit detects the rotation angle of the hoisting machine for the first rotation. It is stored as an angle, and after the first rotation angle is detected, the rotation angle detection unit detects when the detection state is switched by the position detection unit passing through the first boundary due to the running of the car. A storage unit that stores the rotation angle of the hoist as the second rotation angle,
A calculation unit that calculates the amount of slip between the main rope and the sheave based on the difference between the first rotation angle and the second rotation angle stored by the storage unit.
Elevator slip detection system equipped with.
The calculation unit is based on the difference between the first rotation angle detected when the elevator is performing the diagnostic operation and the second rotation angle detected when the elevator is performing the diagnostic operation. The slip detection system for an elevator according to claim 1, wherein the slip amount is calculated.
The calculation unit includes the first rotation angle detected when the car travels continuously from the first stop floor to the second stop floor, and the car from the first stop floor to the second stop floor. The slip detection system for an elevator according to claim 1 or 2, wherein the slip amount is calculated based on the difference between the second rotation angles detected during continuous traveling.
In the calculation unit, the first rotation angle detected when the car travels continuously between the lowest floor and the top floor, and the car continuously runs between the lowest floor and the top floor. The slip detection system for an elevator according to claim 3, wherein the slip amount is calculated based on the difference between the second rotation angles detected during traveling.
The calculation unit is based on the difference between the first rotation angle and the second rotation angle detected after the traveling direction of the car is reversed between the stop floors after the first rotation angle is detected. The slip detection system for an elevator according to claim 1 or 2, which calculates the amount of slip.
The calculation unit detects the first rotation angle detected when the car is traveling in either the ascending or descending traveling direction, and is detected when the car is traveling in the traveling direction. The slip detection system for an elevator according to any one of claims 1 to 5, which calculates the slip amount based on the difference in the second rotation angle.
The calculation unit is based on the difference between the first rotation angle and the second rotation angle detected after the traveling direction of the car is reversed exactly twice after the first rotation angle is detected. The slip detection system for an elevator according to claim 6.
Equipped with a weighing device to measure the load weight of the car
When the fluctuation of the load weight measured by the weighing device is within a preset range between the detection of the first rotation angle and the detection of the second rotation angle, the calculation unit may perform the calculation unit. The slip detection system for an elevator according to any one of claims 1 to 7, which calculates the slip amount.
Claims 1 to 8 include a command unit that outputs a command for keeping the car door of the car closed between the time when the first rotation angle is detected and the time when the second rotation angle is detected. Elevator slip detection system according to any one item.
The slip detection system for an elevator according to any one of claims 1 to 9, further comprising a determination unit that determines as an abnormality when the slip amount calculated by the calculation unit exceeds a preset threshold value.
A determination unit for determining an abnormality when the ratio of the slip amount to the reference mileage, which is the distance traveled by the car on the hoistway, exceeds a preset threshold value in detecting the slip amount.
The slip detection system for an elevator according to any one of claims 1 to 9, wherein the calculation unit calculates the ratio by dividing the slip amount by the reference mileage.
A second body to be detected is provided above or below the first body to be detected in the hoistway.
The position detection unit switches its detection state depending on whether or not it is in the second detection region at the height of the second detection object.
In the storage unit, the position detection unit passes through the second boundary of the second detection region due to the traveling of the car after the first rotation angle is detected and before the second rotation angle is detected. The rotation angle of the hoisting machine detected by the rotation angle detection unit when the detection state is switched is stored as a third rotation angle.
According to claim 11, the calculation unit calculates the distance between the first boundary and the second boundary as the reference mileage based on the first rotation angle or the second rotation angle and the third rotation angle. Elevator slip detection system described.
The storage unit is the hoisting machine detected by the rotation angle detection unit when the traveling direction of the car is reversed at the first inversion position on one side of the first boundary after the first rotation angle is detected. The rotation angle of the car is stored as the fourth rotation angle, and the car travels at the second inversion position on the other side of the first boundary after the fourth rotation angle is detected and before the second rotation angle is detected. The rotation angle of the hoisting machine detected by the rotation angle detection unit when the direction is reversed is stored as the fifth rotation angle.
The elevator according to claim 11, wherein the calculation unit calculates the distance between the first reversal position and the second reversal position as the reference mileage based on the fourth rotation angle and the fifth rotation angle. Slip detection system.