阅读说明：本技术 电梯的打滑检测系统 (Elevator slip detection system ) 是由 山崎智史 近藤力雄 木村哲也 于 2019-04-24 设计创作，主要内容包括：提供能够以更高的精度检测出主绳索的打滑的打滑检测系统。打滑检测系统(1)具备旋转角检测部(16)、第1被检测体(18)、位置检测部(19)、存储部(21)以及计算部(22)。存储部(21)将由于轿厢(8)的行驶而使得位置检测部(19)经过第1检测区域的第1边界从而检测状态被切换时旋转角检测部(16)检测出的曳引机(7)的旋转角作为第1旋转角进行存储。存储部(21)将在检测出第1旋转角之后由于轿厢(8)的行驶而使得位置检测部(19)经过第1边界从而检测状态被切换时旋转角检测部(16)检测出的曳引机(7)的旋转角作为第2旋转角进行存储。计算部(22)根据存储部(21)所存储的第1旋转角与第2旋转角之差计算出主绳索(6)与绳轮(5)之间的打滑量。(Provided is a slip detection system capable of detecting a slip of a main rope with higher accuracy. A slip detection system (1) is provided with a rotation angle detection unit (16), a 1 st detected body (18), a position detection unit (19), a storage unit (21), and a calculation unit (22). The storage unit (21) stores, as the 1 st rotation angle, the rotation angle of the hoisting machine (7) detected by the rotation angle detection unit (16) when the detection state is switched by the position detection unit (19) passing the 1 st boundary of the 1 st detection area due to the travel of the car (8). The storage unit (21) stores, as the 2 nd rotation angle, the rotation angle of the hoisting machine (7) detected by the rotation angle detection unit (16) when the detection state is switched by the position detection unit (19) passing the 1 st boundary due to the travel of the car (8) after the 1 st rotation angle is detected. A calculation unit (22) calculates the amount of slip between the main rope (6) and the sheave (5) from the difference between the 1 st rotation angle and the 2 nd rotation angle stored in the storage unit (21).)

1. An elevator slip detection system, comprising:

a rotation angle detection unit that detects a rotation angle of a hoisting machine that drives a main rope of an elevator by rotation of a sheave around which the main rope is wound;

a 1 st detected body fixed to a hoistway in which a car and a counterweight travel, the car being provided on one side of the main rope with respect to the sheave, and the counterweight being provided on the other side of the main rope with respect to the sheave;

a position detection unit provided in the car or the counterweight, and switching a detection state according to whether or not the position detection unit is in a 1 st detection region at the height of the 1 st detected body;

a storage unit that stores, as a 1 st rotation angle, a 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 a 1 st boundary of the 1 st detection area due to traveling of the car, and stores, as a 2 nd rotation angle, a 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 the 1 st boundary due to traveling of the car after the 1 st rotation angle is detected; and

and a calculation unit that calculates a slip amount between the main rope and the sheave based on a difference between the 1 st rotation angle and the 2 nd rotation angle stored in the storage unit.

2. The elevator slip detection system according to claim 1,

the calculation unit calculates the slip amount based on a difference between the 1 st rotation angle detected when the elevator performs the diagnostic operation and the 2 nd rotation angle detected when the elevator performs the diagnostic operation.

3. The slippage detection system of an elevator according to claim 1 or 2, wherein,

the calculation unit calculates the slip amount based on a difference between the 1 st rotation angle detected when the car continuously travels from the 1 st stop floor to the 2 nd stop floor and the 2 nd rotation angle detected when the car continuously travels from the 1 st stop floor to the 2 nd stop floor.

4. The elevator slip detection system according to claim 3, wherein,

the calculation unit calculates the slip amount based on a difference between the 1 st rotation angle detected when the car is continuously traveling between a lowermost floor and an uppermost floor and the 2 nd rotation angle detected when the car is continuously traveling between the lowermost floor and the uppermost floor.

5. The slippage detection system of an elevator according to claim 1 or 2, wherein,

the calculation unit calculates the slip amount based on a difference between the 1 st rotation angle and the 2 nd rotation angle detected after the traveling direction of the car is reversed between the stopping floors after the 1 st rotation angle is detected.

6. The slippage detection system of an elevator according to any one of claims 1 to 5, wherein,

the calculation unit calculates the slip amount based on a difference between the 1 st rotation angle detected when the car travels in any one of the upward and downward traveling directions and the 2 nd rotation angle detected when the car travels in the traveling direction.

7. The elevator slip detection system according to claim 6, wherein,

the calculation unit calculates the slip amount based on a difference between the 1 st rotation angle and the 2 nd rotation angle detected just after the 1 st rotation angle is detected and the traveling direction of the car is reversed twice.

8. The slippage detection system of an elevator according to any one of claims 1 to 7, wherein,

the elevator slip detection system is provided with a weighing device for measuring the bearing weight of the car,

the calculation unit calculates the slip amount when a variation in the load weight measured by the weighing apparatus falls within a predetermined range from the detection of the 1 st rotation angle to the detection of the 2 nd rotation angle.

9. The slippage detection system of an elevator according to any one of claims 1 to 8, wherein,

the elevator slippage detection system includes a command unit that outputs a command to keep the car door of the car closed during a period from the detection of the 1 st rotation angle to the detection of the 2 nd rotation angle.

10. The slippage detection system of an elevator according to any one of claims 1-9, wherein,

the elevator slip detection system includes a determination unit that determines that an abnormality has occurred when the amount of slip calculated by the calculation unit exceeds a preset threshold value.

11. The slippage detection system of an elevator according to any one of claims 1-9, wherein,

the elevator slip detection system includes a determination unit that determines an abnormality when a ratio of the slip amount to a reference travel distance, which is a distance traveled by the car in the hoistway, exceeds a preset threshold value during detection of the slip amount,

the calculation portion calculates the ratio by dividing the slip amount by the reference travel distance.

12. The system for detecting a slip of an elevator according to claim 11, wherein,

the elevator slip detection system comprises a 2 nd detected body, wherein the 2 nd detected body is fixed above or below the 1 st detected body in the hoistway,

the position detection unit switches the detection state according to whether or not the 2 nd detection region is located at the height of the 2 nd object,

the storage unit stores, as a 3 rd rotation angle, a 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 a 2 nd boundary of the 2 nd detection area due to traveling of the car after the 1 st rotation angle is detected and before the 2 nd rotation angle is detected,

the calculation unit calculates a distance between the 1 st boundary and the 2 nd boundary as the reference travel distance from the 1 st rotation angle or the 2 nd rotation angle and the 3 rd rotation angle.

13. The system for detecting a slip of an elevator according to claim 11, wherein,

the storage unit stores, as a 4 th rotation angle, a rotation angle of the hoisting machine detected by the rotation angle detection unit when the traveling direction of the car is reversed at a 1 st reversal position on one side of the 1 st boundary after the 1 st rotation angle is detected, and stores, as a 5 th rotation angle, a rotation angle of the hoisting machine detected by the rotation angle detection unit when the traveling direction of the car is reversed at a 2 nd reversal position on the other side of the 1 st boundary after the 4 th rotation angle is detected and before the 2 nd rotation angle is detected,

the calculation unit calculates a distance between the 1 st reversal position and the 2 nd reversal position as the reference travel distance from the 4 th rotation angle and the 5 th rotation angle.

Technical Field

The present invention relates to a slip detection system for an elevator.

Background

Patent document 1 describes an example of an elevator system. The elevator system detects a slip of the main rope based on a signal of a pulse encoder outputted during a period from a reference floor to a floor panel at which a predetermined floor is detected.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-43291

Disclosure of Invention

Problems to be solved by the invention

However, in the elevator system described in patent document 1, the car travels from the reference floor. Therefore, an error may occur in the amount of the floor panel length in the traveling direction of the car with respect to the reference position of the car.

The present invention has been made to solve the above problems. The invention aims to provide a slip detection system capable of detecting the slip of a main rope with higher precision.

Means for solving the problems

The elevator slip detection system of the present invention comprises: a rotation angle detection unit that detects a rotation angle of a hoisting machine that drives a main rope by rotation of a sheave around which the main rope of an elevator is wound; a 1 st detected body fixed to a hoistway in which a car and a counterweight travel, the car being disposed on one side of a main rope with respect to a sheave, and the counterweight being disposed on the other side of the main rope with respect to the sheave; a position detection part which is arranged on the car or the counterweight and switches a detection state according to whether the position detection part is in a 1 st detection area on the height of a 1 st detected body; a storage unit that stores, as a 1 st rotation angle, a 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 a 1 st boundary of a 1 st detection area due to travel of the car, and stores, as a 2 nd rotation angle, a 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 the 1 st boundary due to travel of the car after the 1 st rotation angle is detected; and a calculation unit that calculates the amount of slip between the main rope and the sheave based on the difference between the 1 st rotation angle and the 2 nd rotation angle stored in the storage unit.

Effects of the invention

According to the present invention, the slip detection system includes a rotation angle detection unit, the 1 st detected object, a position detection unit, a storage unit, and a calculation unit. The main rope of the elevator is wound around the sheave. The traction machine drives the main ropes by rotation of the sheave. The rotation angle detection unit detects a 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 disposed on the other side of the main rope with respect to the sheave. The 1 st detection object is fixed to a hoistway in which a car and a counterweight travel. The position detection unit is provided in the car or the counterweight. The position detection unit switches the detection state according to whether or not the 1 st detection region is located at the height of the 1 st object. The storage unit stores, as the 1 st rotation angle, 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 the 1 st boundary of the 1 st detection area due to the travel of the car. The storage unit stores, as the 2 nd rotation angle, 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 1 st boundary due to the travel of the car after the 1 st rotation angle is detected. The calculation unit calculates the amount of slip between the main rope and the sheave based on the difference between the 1 st rotation angle and the 2 nd rotation angle stored in the storage unit. Thus, the slip detection system can detect the slip of the main rope with higher accuracy.

Drawings

Fig. 1 is a configuration diagram of a slip detection system according to embodiment 1.

Fig. 2 is a configuration diagram of a main part of the slip detection system according to embodiment 1.

Fig. 3 is a diagram showing an example of the slip detection by the slip detection system according to embodiment 1.

Fig. 4 is a flowchart showing an example of the operation of the slip detection system according to embodiment 1.

Fig. 5 is a flowchart showing an example of the operation of the slip detection system according to embodiment 1.

Fig. 6 is a diagram showing a hardware configuration of a main part of the slippage detection system according to embodiment 1.

Fig. 7 is a diagram showing an example of the slip detection by the slip detection system according to embodiment 2.

Fig. 8 is a diagram showing an example of the slip detection by the slip detection system according to embodiment 3.

Detailed Description

A mode for carrying out the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and overlapping description is simplified or omitted as appropriate.

Embodiment mode 1

Fig. 1 is a configuration diagram of a slip detection system according to embodiment 1.

Fig. 1 shows an elevator 2 provided with a slip detection system 1. The elevator 2 is installed in a building having a plurality of floors. In this example, the lowest floor of the building is 1 floor. In this example, the uppermost floor of the building is 3 floors. The building has 2 floors between 1 floor and 3 floors. In a building, a hoistway 3 of an elevator 2 penetrates each of a plurality of floors. In a building, a landing 4 of an elevator 2 is provided on each of a plurality of floors. The landing 4 communicates with the hoistway 3 through a landing doorway. The landing doorway is an opening that connects 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. The sheave 5 is a sheave provided coaxially with the hoisting machine 7. The main ropes 6 are wound around the sheave 5. The hoisting machine 7 is provided, for example, in an upper portion or a lower portion of the hoistway 3. The hoisting machine 7 is a device that drives the main ropes 6 by rotation of the sheave 5. The car 8 is provided on one side of the main ropes 6 with respect to the sheave 5 in the hoistway 3. A 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 that follows the main rope 6 driven by the hoisting machine 7 and travels in the vertical direction in the hoistway 3 to transport users and the like between a plurality of floors of a building. The car 8 includes a car door 14. The car door 14 is a device that opens and closes when the car 8 stops at any of a plurality of floors so that a user can get on and off the car 8 from the landing 4 at that floor. The counterweight 9 is a device for balancing the load of the car 8 acting on the sheave 5 with the main rope 6. The counterweight 9 follows the main rope 6 driven by the hoisting machine 7 and travels in the hoistway 3 in the direction opposite to the car 8. The landing doors 10 are provided at the landing entrances of the floors. The landing door 10 is a device that opens and closes in conjunction with the car door 14 so that a user can get on and off the car 8. The brake 11 is a device for braking the travel of the car 8. The brake 11 is provided to 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 an upper portion or a lower portion of the hoistway 3. The control panel 13 is a device for controlling 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 operation device 15 is connected to the control panel 13. The remote operation device 15 is a device that outputs an operation command to the control panel 13. The commands output by the remote operation device 15 include, for example, a command to perform a normal operation, a command to perform a diagnostic operation, and the like. Here, the normal operation is a 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 a position of any of a plurality of floors. Each of the plurality of floors is an example of a landing floor of the elevator 2. The diagnosis 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 any position in the hoistway 3.

The slip detection system 1 of the elevator 2 includes an encoder 16, a weighing device 17, a plurality of floor boards 18, a floor stop 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 in the hoisting machine 7.

The weighing 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.

The floor plates 18 are fixed to the hoistway 3. The plurality of floor panels 18 are examples of the 1 st object or the 2 nd object, respectively. The plurality of floor panels 18 are provided below a landing doorway at each of a plurality of floors of a building, for example.

The floor sensor 19 is provided to the car 8. The floor sensor 19 is provided, for example, in a lower portion of the car 8. The floor stop sensor 19 is an example of a position detection unit. The floor stop sensor 19 detects that the car 8 stops at 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 installed, for example, in an upper portion or a lower portion 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 the 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 portion 22 is a portion that calculates information relating 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 from the rotation angle of the hoisting machine 7 stored in the storage unit 21, for example.

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

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

Fig. 2 is a configuration diagram of a main part of the slip detection system according to embodiment 1.

Fig. 2 shows the car 8 in a state of stopping at any of a plurality of floors. In fig. 2, the left-right direction of the car 8 is a direction perpendicular to the paper surface.

The floor panels 18 are, for example, metal panels. In this example, the thickness direction of the floor panel 18 is oriented in the horizontal direction. The thickness direction of the floor panel 18 is oriented in the left-right direction of the car 8. The floor panel 18 is disposed, for example, at a position laterally outward of the outer surface of the car 8 so as not to interfere with the car 8 traveling in the hoistway 3.

The floor stop sensor 19 is provided with, for example, an electromagnetic proximity sensor for detecting proximity of the floor panel 18. The floor stop sensor 19 has a detection state. In this example, the detection state of the floor stop sensor 19 is an ON state or an OFF state. The detection state of the floor stop sensor 19 is an ON state when the floor stop sensor 19 is in the detection area. The detection state of the floor stop sensor 19 is ON when the floor stop sensor 19 is not in the detection area. The detection area is the area above the level of the floor slab 18. The detection area is, for example, the landing range of the floor on which the floor panel 18 is provided. The detection area is, for example, the area from the upper end of the floor plate 18 to the lower end of the floor plate 18. In this case, the boundary of the detection area is a position corresponding to the height of the upper end or the lower end of the floor plate 18. The detection state of the floor-stopping sensor 19 can be switched when the floor-stopping sensor 19 passes the boundary of the detection area. The detection state can be switched between an ON state and an OFF state.

Next, the function of the slippage detection system 1 will be described with reference to fig. 3.

Fig. 3 is a diagram showing an example of the slip detection by the slip detection system according to embodiment 1.

In fig. 3, the horizontal axis of the graph represents time. In fig. 3, the vertical axis of the graph indicates the position of the car 8.

The remote operation device 15 outputs a command for performing a 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 during the slip detection operation. For example, when the slip detection operation is started, the control panel 13 notifies the information processing device 20 to start the slip detection operation. Alternatively, the remote operation 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 command for the slip detection operation to the control panel 13. While the slip detection operation is being performed, the command unit 24 outputs a command to the control panel 13 to keep the car doors 14 closed. The control panel 13 keeps the car door 14 closed during the slip detection operation in accordance with the input command. The control panel 13 causes the car 8 to perform an operation related to the slip detection operation in accordance with, for example, a command input from the command unit 24.

In this example, the car 8 stops at floor 1 at the start of the slip detection operation. In the slip detection operation, the car 8 continuously travels from floor 1 to floor 3. After that, the car 8 continuously travels from floor 3 to floor 1. After that, the car 8 travels from floor 1 to floor 2. Here, level 1 is an example of a 1 st stopping floor. The floor plate 18 of level 1 is an example of the 1 st object. The detection zone at the level of floor panel 18 of level 1 is an example of the 1 st detection zone. The boundary of the detection area corresponding to the height of the upper end of the floor panel 18 of level 1 is an example of the 1 st boundary. Floor 3 is an example of a 2 nd stop floor. The floor plate 18 at level 3 is an example of the 2 nd subject. The detection area at the level of floor plate 18 of level 3 is an example of the 2 nd detection area. The boundary of the detection area corresponding to the height of the lower end of the floor panel 18 of level 3 is an example of the 2 nd boundary.

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

At point a, the car 8 starts traveling from 1 floor to 3 floors. At point b, the landing sensor 19 passes the boundary of the detection area corresponding to the height of the upper end of the floor panel 18 of level 1. The storage unit 21 stores the rotation angle θ 1 of the hoisting machine 7 detected by the encoder 16 at this time as the 1 st rotation angle.

At point c, the car 8 stops traveling at floor 3. The car 8 stopped at point d then starts to reverse the traveling direction from the ascending to the descending traveling at point e. Here, the position of the car 8 at the point d is a position above the boundary of the detection area corresponding to the height of the upper end of the floor plate 18 at level 1. The position of the car 8 at point d is an example of the 1 st reversal position.

At point f, the car 8 stops traveling at floor 1. The car 8 stopped at point g then starts reversing the travel direction from descending to ascending at point h. Here, the position of the car 8 at the point g is lower than the boundary of the detection area corresponding to the height of the upper end of the floor plate 18 at level 1. The position of the car 8 at point g is an example of the 2 nd reversal position. Thereafter, at the point i, the floor stop sensor 19 passes the boundary of the detection area corresponding to the height of the upper end of the floor panel 18 of level 1. The storage unit 21 stores the rotation angle θ 2 of the hoisting machine 7 detected by the encoder 16 at this time as the 2 nd rotation angle.

At point j, the car 8 stops traveling at floor 2.

Then, the calculation unit 22 calculates the amount of slip between the main rope 6 and the sheave 5 from the difference between the 1 st rotation angle and the 2 nd rotation angle. The calculation unit 22 may set the difference between the 1 st rotation angle and the 2 nd rotation angle as the slip amount between the main rope 6 and the sheave 5, for example.

The command unit 24 outputs a command for displaying the calculated slip amount to the control panel 13, for example. The control panel 13 displays the slip amount on, for example, a display device of the elevator 2, not shown. The display device of the elevator 2 is, for example, a display portion 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 operation device 15. The remote operation device 15 notifies the manager or the like of the elevator 2 located at the remote location 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, there is a possibility that a difference occurs between the 1 st rotation angle and the 2 nd rotation angle due to the elongation of the main rope 6 caused by the weight difference between the car 8 and the counterweight 9. Therefore, the threshold value of the slip amount is set in advance to a value larger than the difference in the rotation angle that may occur due to the elongation of the main ropes 6 caused by the weight difference between the car 8 and the counterweight 9.

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

Next, an operation example of the slippage detection system 1 will be described with reference to fig. 4 and 5.

Fig. 4 and 5 are flowcharts showing an example of operation of the slip detection system according to embodiment 1.

Fig. 4 shows an example of the operation of the slip detection system 1 relating to the entire slip detection.

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

In step S2, the command unit 24 outputs a command indicating 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 or not the calculated slip amount exceeds a threshold value. If the determination result is yes, the operation of the slip detection system 1 proceeds to step S4. If 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 instruction unit 24 outputs an instruction to display the determined diagnosis result. After that, the operation of the slip detection system 1 is ended.

Fig. 5 shows an example of the operation of the slip detection system 1 relating to the calculation of the slip amount.

In step S11, the command unit 24 outputs a command to start traveling of the car 8 stopped at the 1 st stopping floor. Thereafter, the operation of the slip detection system 1 relating to the calculation of the slip amount proceeds to step S12.

In step S12, the storage unit 21 stores, for example, the 1 st rotation angle detected by the encoder 16. Thereafter, the operation of the slip detection system 1 relating 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 at the 2 nd stopping floor. Thereafter, the operation of the slip detection system 1 relating to the calculation of the slip amount proceeds to step S14.

In step S14, the command unit 24 outputs a command to start the car 8 stopped at the 2 nd stopping floor to run after reversing the running direction. Thereafter, the operation of the slip detection system 1 relating 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 at the 1 st stopping floor. Thereafter, the operation of the slip detection system 1 relating to the calculation of the slip amount proceeds to step S16.

In step S16, the command unit 24 outputs a command to start the car 8 stopped at the 1 st stopping floor to run after reversing the running direction. Thereafter, the operation of the slip detection system 1 relating to the calculation of the slip amount proceeds to step S17.

In step S17, the storage unit 21 stores, for example, the 2 nd rotation angle detected by the encoder 16. Thereafter, the operation of the slip detection system 1 relating 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 relating to the calculation of the slip amount is ended.

As described above, the slip detection system 1 includes the rotation angle detection unit, the 1 st object, the position detection unit, the storage unit 21, and the calculation unit 22. The main ropes 6 of the elevator 2 are wound around the sheave 5. The hoisting machine 7 drives the main ropes 6 by 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 ropes 6 with respect to the sheave 5. The counterweight 9 is disposed on the other side of the main rope 6 with respect to the sheave 5. The 1 st detection object is fixed to the hoistway 3 in 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 according to whether or not the 1 st detection region is located at the height of the 1 st object. The storage unit 21 stores, as the 1 st rotation angle, 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 the 1 st boundary of the 1 st detection area due to the travel of the car 8. The storage unit 21 stores, as the 2 nd rotation angle, 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 the 1 st boundary due to the travel of the car 8 after the 1 st rotation angle is detected. The calculation unit 22 calculates the amount of slip between the main rope 6 and the sheave 5 from the difference between the 1 st rotation angle and the 2 nd rotation angle stored in the storage unit 21.

The 1 st rotation angle and the 2 nd rotation angle are rotation angles detected at the boundary of the detection region. 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 1 st rotation angle and the 2 nd rotation angle used for the slip detection with high accuracy. The position of the position detection unit at the time of detecting the 1 st rotation angle is the same as the position of the position detection unit at the time of detecting the 2 nd rotation angle. Therefore, the difference between the 1 st rotation angle and the 2 nd rotation angle directly reflects the slip between the main rope 6 and the sheave 5. This enables the slip detection system 1 to detect the slip of the main rope 6 with higher accuracy. Further, the slip detection system 1 calculates the amount of slip using a single object to be detected. Therefore, the slip detection system 1 is not affected by the difference in the installation state of the relativity between the plurality of detected bodies in the slip amount calculation.

The calculation unit 22 calculates the slip amount based on the difference between the 1 st rotation angle detected when the elevator 2 is in the diagnostic operation and the 2 nd rotation angle detected when the elevator 2 is in the diagnostic operation.

In the diagnosis operation, the elevator 2 cannot be used by the user. Therefore, uncertainty due to the use state of the user does not occur in the slip amount calculation.

The calculation unit 22 calculates the amount of slip from the difference between the 1 st rotation angle detected when the car 8 continuously travels from the 1 st stop floor to the 2 nd stop floor and the 2 nd rotation angle detected when the car 8 continuously travels from the 1 st stop floor to the 2 nd stop floor.

The slip amount is calculated by setting the conditions such as the traveling speed of the car 8 when the 1 st rotation angle is detected and the conditions such as the traveling speed of the car 8 when the 2 nd rotation angle is detected to be the same. Therefore, even when the detection by the position detection unit depends on the traveling speed of the car 8, an error due to a difference in the traveling speed of the car 8 in the calculation of the slip amount can be suppressed.

The calculation unit 22 calculates the amount of slip from the difference between the 1 st rotation angle detected when the car 8 travels continuously between the lowermost floor and the uppermost floor and the 2 nd rotation angle detected when the car 8 travels continuously between the lowermost floor and the uppermost floor.

The slip amount is calculated on the condition that the distance that the car 8 continuously travels is longest. The longer the travel distance of the car 8 is, the longer the length of the main rope 6 driven by the sheave 5 is. 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.

The calculation unit 22 calculates the slip amount based on the difference between the 1 st rotation angle detected when the car 8 travels in any traveling direction of ascending or descending and the 2 nd rotation angle detected when the car 8 travels in the traveling direction.

The slip amount is calculated by setting the traveling direction of the car 8 when the 1 st rotation angle is detected and the traveling direction of the car 8 when the 2 nd rotation angle is detected to be the same. Therefore, even when the detection by the position detection unit depends on the traveling direction of the car 8, an error due to a difference in the traveling direction of the car 8 in the calculation of the slip amount can be suppressed.

The calculation unit 22 calculates the amount of slip from the difference between the 1 st rotation angle and the 2 nd rotation angle detected just after the 1 st rotation angle is detected and the traveling direction of the car 8 is reversed twice.

Since the cars 8 that do not move cyclically pass through the same position of the hoistway 3 in the same traveling direction, the traveling direction needs to be reversed twice or more. Therefore, the slip detection system 1 can suppress, to the minimum, 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 the calculation of the slip amount.

The slip detection system 1 further includes a command unit 24. The command section 24 outputs a command to keep the car doors 14 of the car 8 closed during a period from the detection of the 1 st rotation angle to the detection of the 2 nd rotation angle.

During the running of the car 8 in the slip detection, a user, a maintenance worker, or the like does not get inside the car 8. Therefore, it is possible to prevent a change in the load weight of the car 8 during travel of the car 8 in the slip detection.

The slip detection system 1 further includes a determination unit 23. The determination unit 23 determines that there is 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 a decrease in traction (traction) due to the amount of slip is abnormal. Here, the reduction in traction is caused by, for example, abrasion of the grooves of the sheave 5, adhesion of foreign matter to the main ropes 6, and the like.

The calculation unit 22 may calculate the slip amount from a difference between the 1 st rotation angle and a 2 nd rotation angle detected after the 1 st rotation angle is detected and the traveling direction of the car 8 is reversed between the stop floors. For example, at least one of the 1 st rotation angle and the 2 nd rotation angle may be a rotation angle detected when the car 8 travels from a position between the 1 st floor and the 2 nd floor to a position between the 2 nd floor and the 3 nd floor.

This allows the travel distance of the car 8 to be set regardless of the height of the floor. Therefore, the slip detection system 1 can detect, for example, a local slip of the main rope 6. In this case, the slippage detection system 1 can be used to identify, for example, a portion of the main rope 6 where slippage occurs.

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

The detected object and the position detecting unit may be devices other than the floor panel 18 and the landing sensor 19. The position detector may be, for example, an optical type, a capacitance type, an ultrasonic type, or a device for detecting the object based on other principles. The detected object may be disposed at a position between adjacent floors. In this case, the slip detection system 1 can detect the amount of slip by causing the car 8 to travel between adjacent floors. The position detecting unit may be provided in the counterweight 9.

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 operation device 15. Some or all of the functions of the information processing device 20 may be realized by the control panel 13 or the remote operation device 15, for example.

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

Next, an example of the hardware configuration of the slippage detection system 1 will be described with reference to fig. 6.

Fig. 6 is a diagram showing a hardware configuration of a main part of the slippage detection system according to embodiment 1.

The respective functions of the slip detection system 1 can be realized by a processing circuit. The processing circuit is provided with at least one processor 1b and at least one memory 1 c. The processing circuit may include the processor 1b and the memory 1c, or may include at least one dedicated hardware 1a instead of these.

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 the firmware is described as a program. The program is stored in the memory 1 c. The processor 1b realizes each function of the slip detection system 1 by reading out and executing a program stored in the memory 1 c.

The processor 1b is also called a CPU (Central Processing Unit), a Processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP. The Memory 1c is composed of, for example, a nonvolatile or volatile semiconductor Memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash Memory, an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), a magnetic Disk, a flexible Disk, an optical Disk, a CD (compact Disk), a mini Disk (mini Disk), a DVD (Digital Versatile Disk), and the like.

In the case where the processing Circuit includes the 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 (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof.

The respective functions of the slip detection system 1 can be realized by the processing circuit. Alternatively, the respective functions of the slip detection system 1 may be realized by the processing circuit in a lump. The functions of the slip detection system 1 may be partially implemented by dedicated hardware 1a, and the other parts may be implemented by software or firmware. In this way, the processing circuit realizes the respective functions of the slip detection system 1 by hardware 1a, software, firmware, or a combination thereof.

Embodiment mode 2

In embodiment 2, points different from the example disclosed in embodiment 1 will be described in detail. As for the features not described in embodiment 2, any of the features in the example disclosed in embodiment 1 may be adopted.

Fig. 7 is a diagram showing an example of the slip detection by the slip detection system according to embodiment 2.

In fig. 7, the horizontal axis of the graph represents time. In fig. 7, the vertical axis of the graph indicates the position of the car 8.

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

In this example, the car 8 travels in the same manner as in the example shown in embodiment 1. The information processing device 20 detects a slip of the elevator 2, for example, as follows.

While the car 8 ascends between floors 1 and 3, at the point k, the floor stop sensor 19 passes the boundary of the detection area corresponding to the height of the lower end of the floor panel 18 of floor 2. The storage unit 21 stores the rotation angle of the hoisting machine 7 detected by the encoder 16 at this timeStored as the 1 st rotation angle.

After that, when the car 8 stops at the 2 nd floor, the floor stop sensor 19 passes the boundary of the detection area corresponding to the height of the lower end of the floor panel 18 of the 2 nd floor at the point l. The storage unit 21 stores the rotation angle of the hoisting machine 7 detected by the encoder 16 at this timeStored as the 2 nd rotation angle.

Then, the calculation unit 22 calculates the slip amount from the difference between the 1 st rotation angle and the 2 nd rotation angle.

The weighing device 17 monitors whether or not the measured variation in the load weight is within a predetermined range during a period from the detection of the 1 st rotation angle to the detection of the 2 nd rotation angle. The range of variation in the load weight is set to a range smaller than the variation in the load weight when the user rides on or 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 variation in the bearing weight exceeds a predetermined range, the weighing device 17 notifies the information processing device 20 of the variation in the bearing weight. At this time, the information processing device 20 suspends the slip amount calculation.

As described above, the slip detection system 1 according to embodiment 2 includes the weighing device 17. The weighing device 17 measures the load weight of the car 8. The calculation unit 22 calculates the slip amount when the variation in the load weight measured by the weighing device 17 falls within a predetermined range from the detection of the 1 st rotation angle to the detection of the 2 nd rotation angle.

The amount of slip between the main ropes 6 and the sheave 5 varies depending on the load weight of the car 8. The calculation portion 22 calculates the slip amount when the change in the load weight is small in the middle of the operation for the slip amount calculation. This can prevent occurrence of a slip amount error due to a change in the load weight of the car 8.

The 1 st rotation angle and the 2 nd rotation angle may be rotation angles detected when the car 8 travels in different sections in the hoistway 3. For example, when a hall call operation is performed in the middle of the operation for calculating the slip amount, the slip detection system 1 may stop the operation. In this case, the calculation unit 22 can calculate the slip amount using the rotation angle information that has been acquired, for example. Thereby, the slip detection system 1 can calculate the amount of slip with more opportunities.

Embodiment 3

In embodiment 3, points different from the examples disclosed in embodiment 1 or embodiment 2 will be described in detail. As for the features not described in embodiment 3, any of the features disclosed in the examples of embodiment 1 or embodiment 2 may be adopted.

Fig. 8 is a diagram showing an example of the slip detection by the slip detection system according to embodiment 3.

In fig. 8, the horizontal axis of the graph represents time. In fig. 8, the vertical axis of the graph indicates the position of the car 8.

In this example, the car 8 travels in the same manner as in the example shown in embodiment 1. The information processing device 20 detects a slip of the elevator 2, for example, as follows.

The 1 st rotation angle is detected at point b.

Thereafter, while the car 8 ascends between floors 1 and 3, the floor stop sensor 19 passes the boundary of the detection area corresponding to the height of the lower end of the floor plate 18 of floor 3 at point m. The storage unit 21 stores the rotation angle θ 3 of the hoisting machine 7 detected by the encoder 16 at this time as the 3 rd rotation angle.

Thereafter, the 2 nd rotation angle is detected at the i point.

Then, the calculation unit 22 calculates the slip amount from the difference between the 1 st rotation angle and the 2 nd rotation angle. The calculation unit 22 calculates a reference travel distance. The reference travel distance is a distance in which the car 8 travels in the hoistway 3 in the slip amount detection. The calculation unit 22 calculates the reference travel distance from the difference between the 1 st rotation angle and the 3 rd rotation angle, for example. Alternatively, the calculation unit 22 may calculate the reference travel distance from the difference between the 2 nd rotation angle and the 3 rd rotation angle. Alternatively, the calculation unit 22 may calculate the reference travel distance from the difference between the 3 rd rotation angle and the average of the 1 st rotation angle and the 2 nd rotation angle. The calculation unit 22 calculates a ratio of the slip amount divided by the reference travel distance.

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 of the slip amount divided by the reference running distance is set in advance to a value larger than a value based on the difference in the rotation angle that may occur due to the elongation of the main ropes 6 due to the difference in the weight of the car 8 and the counterweight 9.

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

The difference between the 1 st and 2 nd rotation angles depends on the distance traveled by the car 8. Here, when the travel distance of the car 8 is long, the difference between the 1 st rotation angle and the 2 nd rotation angle becomes large regardless of the slip. In this case, the diagnostic result is also determined based on the ratio obtained by normalizing the difference between the 1 st rotation angle and the 2 nd rotation angle by the reference travel distance, and therefore, it is possible to suppress erroneous diagnosis as an abnormality.

The slippage detection system 1 further includes the 2 nd detected object. The 2 nd object is fixed above or below the 1 st object in the hoistway 3. The position detection unit switches the detection state according to whether or not the 2 nd detection region is located at the height of the 2 nd object. The storage unit 21 stores, as the 3 rd rotation angle, the rotation angle of the hoisting machine 7 detected by the rotation angle detection unit when the detection state is switched from the 1 st rotation angle detected and before the 2 nd rotation angle detected by the travel of the car 8 such that the position detection unit passes the 2 nd boundary of the 2 nd detection area. The calculation unit 22 calculates a distance between the 1 st boundary and the 2 nd boundary as a reference travel distance from the 1 st rotation angle or the 2 nd rotation angle and the 3 rd rotation angle.

The reference travel distance is measured by the travel of the car 8 in the slip detection. Therefore, the calculation unit 22 can easily calculate the ratio of the slip amount normalized by the reference travel distance. In addition, the reference travel distance can be sufficiently large with respect to the slip amount. Therefore, the relative variation due to the slip can be reduced with respect to the reference running distance itself used for normalization. Here, the reference travel distance may be calculated by multiplying the distance between the 1 st boundary and the 2 nd boundary by 2 times, in consideration of the reciprocation of the car 8 in the hoistway 3.

The information processing device 20 may detect a slip of the elevator 2 as follows, for example.

The 1 st rotation angle is detected at point b.

After that, the traveling direction of the car 8 is reversed at point d. The storage unit 21 stores the rotation angle θ 4 of the hoisting machine 7 detected by the encoder 16 at the point d as the 4 th rotation angle. Here, the rotation angle θ 4 is, for example, a rotation angle when the count-up and count-down of the encoder 16 are reversed.

After that, the traveling direction of the car 8 is reversed again at the point g. The storage unit 21 stores the rotation angle θ 5 of the hoisting machine 7 detected by the encoder 16 at the point g as the 5 th rotation angle. Here, the rotation angle θ 5 is, for example, a rotation angle at the time of reversal of the fall and rise of the count of the encoder 16.

Thereafter, the 2 nd rotation angle is detected at the i point.

Then, the calculation unit 22 calculates the slip amount from the difference between the 1 st rotation angle and the 2 nd rotation angle. The calculation unit 22 calculates the reference travel distance from the difference between the 4 th rotation angle and the 5 th rotation angle, for example. The calculation unit 22 calculates a ratio of the slip amount divided by the reference travel distance.

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 stores 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 1 st reversal position after the 1 st rotation angle is detected, as the 4 th rotation angle. The storage unit 21 stores, as the 5 th rotation angle, 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 2 nd reversal position after the 4 th rotation angle is detected and before the 2 nd rotation angle is detected. The 1 st inversion position is a position on one side of the 1 st boundary. The 2 nd inversion position is a position on the other side of the 1 st boundary. The calculation unit 22 calculates a distance between the 1 st reversal position and the 2 nd reversal position as a reference travel distance from the 4 th rotation angle and the 5 th rotation angle.

The reference travel distance is calculated from the position at which the travel direction of the car 8 is reversed. At the reversal position, the car 8 is temporarily stopped. Therefore, in the calculation of the reference travel distance, an error due to the travel speed of the car 8 does not occur. Thus, the calculation unit 22 can calculate, with higher accuracy, a ratio obtained by normalizing the difference between the 1 st rotation angle and the 2 nd rotation angle by the reference travel distance.

Industrial applicability

The slippage detection system of the present invention can be applied to an elevator.

Description of the reference symbols

1: a slip detection system; 2: an elevator; 3: a hoistway; 4: a landing; 5: a sheave; 6: a main rope; 7: a traction machine; 8: a car; 9: a counterweight; 10: a landing door; 11: a brake; 12: a speed limiter; 13: a control panel; 14: a car door; 15: a remote operation device; 16: an encoder; 17: a weighing device; 18: a floor plate; 19: a layer stop sensor; 20: an information processing device; 21: a storage unit; 22: a calculation section; 23: a determination unit; 24: an instruction unit; 1 a: hardware; 1 b: a processor; 1 c: a memory.