WO2024042642A1

WO2024042642A1 - Deformation detection system and deformation detection method for elevator guide rail

Info

Publication number: WO2024042642A1
Application number: PCT/JP2022/031901
Authority: WO
Inventors: 陽太大森; 智史山▲崎▼; 澤田　貴光; 平長谷川
Original assignee: 三菱電機ビルソリューションズ株式会社
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2024-02-29

Abstract

Provided are a deformation detection system and a deformation detection method that allow for detection of deformation of a guide rail. In the deformation detection system (23), a command unit (24) outputs a speed command corresponding to the speed of a car (10) to a hoisting machine (8). A hoisting machine encoder (13) measures the actual speed corresponding to the speed of the car (10) being moved by the hoisting machine (8) in accordance with the speed command outputted by the command unit (24). A computation unit (25) calculates the speed deviation between the speed command outputted by the command unit (24) and the actual speed measured by the hoisting machine encoder (13) for the car (10). A determination unit (26) determines that the speed deviation is outside an allowable range when the magnitude of the speed deviation calculated by the computation unit (25) is greater than a first threshold value. A detection unit (27) detects deformation of a guide rail (5) on the basis of the determination result from the determination unit (26).

Description

Elevator guide rail deformation detection system and deformation detection method

The present disclosure relates to a deformation detection system and deformation detection method for an elevator guide rail.

Patent Document 1 discloses an example of an elevator. In the elevator, a diagnostic run is performed when the low-sensor seismometer is activated. When no abnormality in the elevator is detected during diagnostic operation, the elevator is automatically restored.

Japanese Patent Publication No. 2006-151660

In elevators, the guide rails that guide the travel of the car or counterweight may be deformed due to earthquakes. However, in the elevator of Patent Document 1, deformation of the guide rail is not detected. Therefore, the elevator may be automatically restored regardless of whether or not the guide rail is deformed.

The present disclosure provides a deformation detection system and a deformation detection method that can detect deformation of a guide rail.

The deformation detection system for an elevator guide rail according to the present disclosure includes a command unit that outputs a speed command corresponding to the speed of the elevator to a hoist that causes the elevator to travel along the guide rail in the hoistway of the elevator. a measurement unit that measures an actual speed corresponding to the speed of the elevating body that is caused to travel by the hoisting machine according to a speed command output by the command unit; and a speed command output by the command unit regarding the elevating body and the measurement. a calculation unit that calculates a speed deviation of the actual speed measured by the calculation unit; The guide rail includes a determining section that determines that the guide rail has deviated from an allowable range, and a detecting section that detects deformation of the guide rail based on the determination result of the determining section.

A method for detecting deformation of an elevator guide rail according to the present disclosure includes a command step of outputting a speed command corresponding to the speed of the elevator to a hoist that causes the elevator to travel along the guide rail in the hoistway of the elevator. a measuring step of measuring an actual speed corresponding to the speed of the elevating body that is caused to travel by the hoisting machine in accordance with the speed command output in the command step; and a speed command output with respect to the elevating body in the command step; a calculation step of calculating a speed deviation of the actual speed measured in the measurement step; and a calculation step of calculating the speed deviation of the elevating body calculated in the calculation step, when the magnitude of the speed deviation of the elevating object exceeds a first threshold value set in advance. The method includes a determining step of determining that the speed deviation of the body has deviated from an allowable range, and a detecting step of detecting deformation of the guide rail based on the determination result in the determining step.

According to the deformation detection system or deformation detection method according to the present disclosure, deformation of an elevator guide rail is detected.

1 is a configuration diagram of an elevator system according to Embodiment 1. FIG. 1 is a block diagram showing the configuration of a deformation detection system according to Embodiment 1. FIG. FIG. 3 is a diagram showing an example of speed deviation in the elevator according to the first embodiment. 3 is a flowchart illustrating an example of the operation of the deformation detection system according to the first embodiment. 1 is a hardware configuration diagram of main parts of a deformation detection system according to Embodiment 1. FIG.

Embodiments for carrying out the subject matter of the present disclosure will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are given the same reference numerals, and overlapping explanations are simplified or omitted as appropriate. Note that the subject of the present disclosure is not limited to the following embodiments, and modifications of any constituent elements of the embodiments or modifications of any constituent elements of the embodiments may be made without departing from the spirit of the present disclosure. Can be omitted.

Embodiment 1.
FIG. 1 is a configuration diagram of an elevator system 1 according to the first embodiment.

The elevator system 1 includes an elevator 2. The elevator 2 is applied, for example, to a building having multiple floors. In a building, a hoistway 3 for an elevator 2 is provided. The hoistway 3 is a vertically long space spanning multiple floors. A pit 4 is provided at the bottom of the hoistway 3. In the hoistway 3, a guide rail 5 is provided. In this example, two sets of two guide rails 5 are arranged. Each guide rail 5 is a device whose longitudinal direction is the vertical direction of the hoistway 3. Each set of guide rails 5 is arranged parallel to each other along the vertical direction in the hoistway 3. Each set of guide rails 5 faces each other. A landing 6 adjacent to the hoistway 3 is provided on each floor of the building. A landing door 7 is provided at the landing 6 of each floor. The landing door 7 is a door that partitions the hoistway 3 and the landing 6. The elevator 2 includes a hoist 8, a main rope 9, a car 10, a counterweight 11, and a control panel 12.

The hoisting machine 8 is arranged, for example, at the upper or lower part of the hoistway 3. For example, when a machine room for the elevator 2 is provided above the hoistway 3, the hoist 8 may be arranged in the machine room. The hoist 8 includes a motor and a sheave. The motor of the hoist 8 is a device that generates driving force. The sheave of the hoist 8 is a device that rotates by the driving force generated by the motor of the hoist 8. In the hoisting machine 8, a hoisting machine encoder 13 is applied. The hoisting machine encoder 13 is a device that measures the amount of rotation of the motor or sheave of the hoisting machine 8.

The main rope 9 is wound around the sheave of the hoist 8. The main rope 9 supports the load of the car 10 on one side of the sheave of the hoist 8. The main rope 9 supports the load of the counterweight 11 on the other side of the sheave of the hoist 8 . The main rope 9 moves as the sheave of the hoist 8 rotates so that either side of the sheave of the hoist 8 is hoisted.

The car 10 is a device that transports users of the elevator 2 and the like between a plurality of floors by traveling up and down the hoistway 3. The counterweight 11 is a device that balances the load applied to both sides of the sheave of the hoist 8 with the car 10. The car 10 and the counterweight 11 travel in opposite directions in the vertical direction in the hoistway 3 in conjunction with the movement of the main rope 9 due to the rotation of the sheave of the hoist 8. That is, the rotational speed of the sheave of the hoist 8 corresponds to the running speed of the car 10 and the counterweight 11. Each of the car 10 and the counterweight 11 is an example of an elevating body that travels in the vertical direction on the hoistway 3. The car 10 is arranged between one set of guide rails 5. The counterweight 11 is arranged between the other set of guide rails 5. Guide rails 5 arranged on both sides of the car 10 guide the running of the car 10 in the vertical direction. Guide rails 5 arranged on both sides of the counterweight 11 guide the travel of the counterweight 11 in the vertical direction. The car 10 includes a car door 14. The car door 14 is a door that partitions the inside and outside of the car 10. The car door 14 is a device that opens and closes the landing door 7 of the floor in conjunction with the car 10 when the car 10 stops at that floor.

The control panel 12 is a device that controls the operation of the elevator 2. The control panel 12 is arranged, for example, at the upper or lower part of the hoistway 3. For example, when the machine room of the elevator 2 is provided above the hoistway 3, the control panel 12 may be arranged in the machine room. Operations of the elevator 2 controlled by the control panel 12 include running of the car 10, opening and closing of the car door 14, and the like. For example, the control panel 12 causes the car 10 to travel between a plurality of floors so as to respond to registered calls. The control panel 12 opens the car door 14 in conjunction with the landing door 7 when the car 10 is stopped at any floor. The control panel 12 maintains the car door 14 and the landing door 7 in a fully open state during a preset door opening time. The control panel 12 interlocks the landing door 7 to close the car door 14 after the door opening time has elapsed since the car door 14 was fully opened.

The elevator 2 includes a speed governor 15, a speed governor rope 16, and a speed governor rope tensioning wheel 17. The speed governor 15 is arranged, for example, at the upper or lower part of the hoistway 3. For example, when the machine room of the elevator 2 is provided above the hoistway 3, the speed governor 15 may be arranged in the machine room. The speed governor 15 is a device that suppresses excessive running speed of the car 10. The speed governor 15 has a sheave. The governor rope 16 is wound around the sheave of the governor 15. Both ends of the governor rope 16 are attached to the car 10. The governor rope 16 is wound around a governor rope tensioner 17. The governor rope tensioning wheel 17 is a sheave that applies tension to the governor rope 16. The speed governor rope tensioning wheel 17 is provided in the pit 4, for example. The governor rope 16 moves as the car 10 travels. The sheave of the speed governor 15 and the speed governor rope tension wheel 17 rotate as the speed governor rope 16 moves. That is, the rotational speed of the sheave of the speed governor 15 corresponds to the running speed of the car 10. The governor 15 suppresses the traveling speed of the car 10 by, for example, braking the movement of the governor rope 16 when the rotational speed of the sheave becomes excessive. A governor encoder 18 is applied to the governor 15 in this example. The governor encoder 18 is a device that measures the amount of rotation of the sheave of the governor 15.

The elevator 2 is equipped with an earthquake sensor 19. The earthquake sensor 19 is placed in the pit 4, for example. The earthquake sensor 19 is configured to be able to detect earthquakes with shaking greater than a threshold value. The threshold value is expressed by the value of acceleration due to earthquake shaking. When the earthquake sensor 19 detects an earthquake with shaking greater than a threshold value, the elevator 2 switches the operation mode from normal operation to diagnostic operation, for example. Normal operation is a normal operation mode in which users are transported between multiple floors in response to a call. The diagnostic operation is an operation mode in which automatic diagnosis is performed to determine the presence or absence of abnormality in each device and device of the elevator 2. For example, in the control panel 12 or the like, it is determined whether or not automatic recovery to normal operation is possible based on the result of automatic diagnosis in diagnostic operation.

The elevator system 1 includes a remote monitoring device 20. The remote monitoring device 20 is a device used for remotely monitoring the status of the elevator 2, etc. The remote monitoring device 20 is connected to the control panel 12 and the like so that information on the status of the elevator 2 can be collected. The remote monitoring device 20 collects, for example, information input to the control panel 12 and information output from the control panel 12 as information on the state of the elevator 2. Information collected by the remote monitoring device 20 is output to, for example, a central management device 22 through a communication network 21 such as the Internet or a telephone line network. The central management device 22 is a device that collects, stores, or manages information on the status of the elevator 2 and the like. The central management device 22 is located at, for example, an information center. The information center is a base that collects and manages information on the status of the elevator 2. Here, the control panel 12 of the elevator 2 may receive a remote control signal or the like from outside the elevator 2. A control signal for remote control is input to the control panel 12 through, for example, the remote monitoring device 20.

In the elevator 2, a deformation detection system 23 is applied. When an earthquake occurs at a location where a building or the like to which the elevator 2 is applied is located, one of the guide rails 5 may be deformed due to the shaking of the earthquake. At this time, even if the deformation is slight enough to allow the car 10 or the counterweight 11 to travel, the deformation may have an effect such as shaking during travel. Therefore, the deformation detection system 23 detects deformation of the guide rail 5 during a diagnostic operation performed after an earthquake occurs. The deformation detection system 23 may be an external system applied to the elevator 2 or an internal system included in the elevator 2.

FIG. 2 is a block diagram showing the configuration of the deformation detection system 23 according to the first embodiment.

The deformation detection system 23 includes a command section 24, a calculation section 25, a determination section 26, a detection section 27, and a notification section 28. In this example, the command section 24 , the calculation section 25 , the determination section 26 , the detection section 27 , and the notification section 28 are mounted on the control panel 12 .

The command unit 24 is a part equipped with a function of outputting a speed command corresponding to the speed of the car 10 to the hoisting machine 8. The speed command corresponding to the speed of the car 10 is a command value for, for example, the vertical traveling speed of the car 10 or the rotational speed of the hoist 8.

The hoisting machine 8 uses a motor to generate driving force in accordance with the speed command output by the command unit 24. As a result, the sheave of the hoist 8 rotates, and the car 10 and counterweight 11 travel in the vertical direction. At this time, the sheave of the speed governor 15 rotates as the car 10 travels. In the deformation detection system 23, the actual speed corresponding to the speed of the car 10 is measured. The actual speed corresponding to the speed of the car 10 is, for example, the actual vertical traveling speed of the car 10 or the counterweight 11, the actual rotational speed of the sheave of the hoist 8, or the actual speed of the sheave of the speed governor 15. Such as rotation speed. In this example, the actual speed corresponding to the speed of the car 10 is measured by the hoist encoder 13 as the rotational speed of the sheave of the hoist 8. Alternatively, the actual speed corresponding to the speed of the car 10 may be measured by the governor encoder 18 as the rotational speed of the sheave of the governor 15. The hoist encoder 13 and the governor encoder 18 are examples of measurement units in the deformation detection system 23. The actual speed measured in the deformation detection system 23 is, for example, a converted value such as the rotational speed of the sheave of the hoist 8 obtained by multiplying the rotational speed of the sheave of the governor 15 measured by the governor encoder 18 by a coefficient. It may be.

The calculation unit 25 is a part equipped with a function of calculating the speed command output by the command unit 24 and the speed deviation of the actual speed measured by the deformation detection system 23. The calculation unit 25 calculates the speed deviation, for example, by taking the difference between the measured value of the actual speed and the command value of the speed command. For example, the calculation unit 25 sequentially calculates the speed deviation of the car 10 while the car 10 is traveling in the diagnostic operation.

The determination unit 26 is a part equipped with a function of determining that the speed deviation has deviated from the allowable range when the magnitude of the speed deviation calculated by the calculation unit 25 exceeds the first threshold value. The first threshold is a preset threshold for speed. The allowable range is, for example, a range in which the speed deviation from the command value of the speed command is smaller than the first threshold value.

The detection unit 27 is a part equipped with a function of detecting deformation of one of the guide rails 5 based on the determination result of the determination unit 26. When the deformation of the guide rail 5 is slight, the portion of the guide rail 5 that guides the car 10 or the counterweight 11 may be slightly tilted in the vertical direction. At this time, the inclined portion of the guide rail 5 acts as resistance to the running of the car 10 or the counterweight 11. Therefore, the deformation of the guide rail 5 may cause a difference between the command value of the speed command and the measured value of the actual speed. Using this, the detection unit 27 detects deformation of the guide rail 5 based on the determination result by the determination unit 26 as to whether or not the speed deviation deviates from the allowable range. For example, when the determining unit 26 determines that the speed deviation has deviated from the allowable range, the detecting unit 27 detects the guide rail at the vertical position in the hoistway 3 where the car 10 or the counterweight 11 was traveling at that time. 5 deformation is detected. Alternatively, the detection unit 27 may cause the determination unit 26 to determine that the speed deviation has deviated from the allowable range when the car 10 or the counterweight 11 are traveling at the same vertical position in the hoistway 3. When the number of times exceeding the second threshold value occurs, deformation of the guide rail 5 at that position is detected. Here, the second threshold is a preset threshold for the number of times. For example, when the second threshold value is set to once, deformation of the guide rail 5 is detected when deviation from the allowable range is determined multiple times. Furthermore, when the vertical positions of the car 10 or the counterweight 11 match within the error range when it is determined that the speed deviation is out of the allowable range, the detection unit 27 determines that these positions are the same position. You may. For example, when the difference between the highest value and the lowest value of multiple positions in the vertical direction is smaller than a preset value, the detection unit 27 determines that these multiple positions match within the error range.

The notification unit 28 is a part equipped with a function of notifying the detection result of the detection unit 27. The detection result of the detection unit 27 may include information on the vertical position in the hoistway 3 of the location where the deformation of the guide rail 5 is detected. The notification unit 28 notifies the central management device 22 through, for example, the remote monitoring device 20 and the communication network 21. Alternatively, the notification unit 28 may notify a maintenance terminal owned by a maintenance worker of the elevator 2 through the communication network 21 or the like. The maintenance terminal is, for example, a portable general-purpose information terminal such as a smartphone. Further, the notification unit 28 may notify the management room when the building to which the elevator 2 is applied has a management room or the like.

Note that some or all of the functions of the deformation detection system 23, such as the calculation section 25, the determination section 26, the detection section 27, and the notification section 28, may be installed in other devices of the control panel 12. Some or all of these functions may be installed in the remote monitoring device 20, the central management device 22, or other devices including a server device outside the information center.

FIG. 3 is a diagram showing an example of speed deviation in the elevator 2 according to the first embodiment.
The horizontal axis in FIG. 3 represents the passage of time while the car 10 is running. The vertical axis in FIG. 3 represents speed. In FIG. 3, a thick broken line represents a time change in the command value of the speed command corresponding to the speed of the car 10. In FIG. 3, a thick solid line represents a change in the measured value of the actual speed corresponding to the speed of the car 10 over time.

As shown in FIG. 3, while the car 10 is traveling in a section where the guide rail 5 is not deformed, the command value of the speed command and the measured value of the actual speed match within a permissible range. When the car 10 travels through a section where the guide rail 5 is deformed, the speed deviation of the car 10 deviates from an allowable range due to, for example, the inclination of the guide rail 5 due to the deformation. At this time, the detection unit 27 detects the deformation of the guide rail 5 based on the determination result of the determination unit 26 that the speed deviation deviates from the allowable range.

FIG. 4 is a flowchart illustrating an example of the operation of the deformation detection system 23 according to the first embodiment.
The process in FIG. 4 is performed, for example, during diagnostic operation in the elevator 2.

In step S01, the command unit 24 outputs a speed command to the hoisting machine 8. In this example, the speed command is a command value for the rotational speed of the sheave of the hoist 8. Thereafter, the process of the deformation detection system 23 proceeds to step S02.

In step S02, the hoisting machine encoder 13 measures the rotational speed of the sheave of the hoisting machine 8 as the actual speed corresponding to the speed of the car 10. Thereafter, the process of the deformation detection system 23 proceeds to step S03.

In step S03, the calculation unit 25 calculates the speed deviation between the speed command output by the command unit 24 and the actual speed measured by the hoist encoder 13. Thereafter, the process of the deformation detection system 23 proceeds to step S04.

In step S04, the determination unit 26 determines whether the speed deviation of the car 10 exceeds the first threshold value. The determining unit 26 determines that the speed deviation of the car 10 has deviated from the allowable range when the speed deviation of the car 10 exceeds the first threshold value. When the determination unit 26 determines that the speed deviation of the car 10 does not deviate from the allowable range, the process of the deformation detection system 23 proceeds to step S01. On the other hand, when the determination unit 26 determines that the speed deviation of the car 10 has deviated from the allowable range, the process of the deformation detection system 23 proceeds to step S05.

In step S05, the detection unit 27 acquires information on the current position of the car 10 in the vertical direction of the hoistway 3. The detection unit 27 may acquire information on the position of the car 10 based on, for example, the rotation angle of the sheave of the hoist 8 measured by the hoist encoder 13. Thereafter, the process of the deformation detection system 23 proceeds to step S06.

In step S06, the detection unit 27 determines whether the number of times the determination unit 26 has determined deviation from the allowable range exceeds the second threshold. If the determination result is NO, the process of the deformation detection system 23 proceeds to step S01. On the other hand, if the determination result is YES, the process of the deformation detection system 23 proceeds to step S07.

In step S07, the detection unit 27 determines whether the positions of the car 10 obtained each time the determination unit 26 determines deviation from the allowable range match within the error range. If the determination result is NO, the process of the deformation detection system 23 proceeds to step S01. On the other hand, if the determination result is YES, the process of the deformation detection system 23 proceeds to step S08.

In step S08, the detection unit 27 detects that the guide rail 5 is deformed at the position of the car 10 or the counterweight 11 when the determination unit 26 determines the deviation from the allowable range. Here, the detection unit 27 detects that one or both of the guide rail 5 that guides the car 10 or the guide rail 5 that guides the counterweight 11 is deformed. In this example, the detection unit 27 does not specify which guide rail 5 of the guide rail 5 that guides the car 10 and the guide rail 5 that guides the counterweight 11 is deformed. The detection unit 27 detects the position of the car 10 when the deviation from the allowable range is determined as the position of a deformed part when the guide rail 5 that guides the car 10 is deformed. The detection unit 27 detects the position of the counterweight 11 when the deviation from the allowable range is determined as the position of a deformed part when the guide rail 5 that guides the balance weight 11 is deformed. Thereafter, the process of the deformation detection system 23 proceeds to step S09.

In step S09, the notification unit 28 notifies the detection result by the detection unit 27. Thereafter, the processing of the deformation detection system 23 ends.

Note that the process in FIG. 4 may be performed during the diagnostic operation in parallel with the running of the car 10 for determining the presence or absence of other abnormalities. At this time, the process in FIG. 4 ends, for example, when normal operation is automatically restored without any other abnormality being determined in the diagnostic operation. Moreover, the process in FIG. 4 may be performed all the time during normal operation.

As described above, the deformation detection system 23 according to the first embodiment includes the command section 24, the hoist encoder 13, the calculation section 25, the determination section 26, and the detection section 27. The hoist 8 causes the car 10 and the counterweight 11 to run along the guide rail 5 in the hoistway 3 of the elevator 2. The command unit 24 outputs a speed command corresponding to the speed of the car 10 or the counterweight 11 to the hoisting machine 8. The hoisting machine encoder 13 measures the actual speed corresponding to the speed of the car 10 or the counterweight 11 that the hoisting machine 8 runs according to the speed command output by the command unit 24. The calculation unit 25 calculates a speed deviation between the speed command output by the command unit 24 and the actual speed measured by the hoist encoder 13 for the car 10 or the counterweight 11 . The determination unit 26 determines that the speed deviation has deviated from the allowable range when the magnitude of the speed deviation calculated by the calculation unit 25 exceeds the first threshold value. The detection unit 27 detects deformation of the guide rail 5 based on the determination result of the determination unit 26.
The deformation detection method according to the first embodiment includes a command step, a measurement step, a calculation step, a determination step, and a detection step. The command step is a step of outputting a speed command corresponding to the car 10 or the counterweight 11 to the hoisting machine 8. The measurement step is a step of measuring the actual speed corresponding to the speed of the car 10 or the counterweight 11 that is driven by the hoisting machine 8 in accordance with the speed command output in the command step. The calculation step is a step of calculating a speed deviation between the speed command output in the command step and the actual speed measured in the measurement step for the car 10 or the counterweight 11. The determination step is a step of determining that the speed deviation has deviated from the allowable range when the magnitude of the speed deviation calculated in the calculation step exceeds the first threshold value. The detection step is a step of detecting deformation of the guide rail 5 based on the determination result in the determination step.

With this configuration, even when the deformation of the guide rail 5 is slight enough to allow the car 10 or the counterweight 11 to travel, the deformation of the guide rail 5 is detected based on the speed deviation. As a result, the elevator 2 can be automatically restored after confirming that there is no deformation of the guide rail 5, so that the elevator 2 can be operated in a better condition after restoration. Furthermore, even when maintenance personnel perform manual inspections after automatic restoration, the number of items to be inspected by maintenance personnel can be reduced. This reduces the workload of maintenance personnel and shortens the time required for recovery.

Further, the detection unit 27 detects each time when the number of times the determination unit 26 determines that the speed deviation has deviated from the allowable range exceeds the second threshold, and the determination unit 26 determines that the speed deviation has deviated from the allowable range. Deformation of the guide rail 5 is detected when the positions of the car 10 or the counterweight 11 match within the error range.

With such a configuration, the deformation of the guide rail 5 is detected after the deviation of the speed deviation from the allowable range is confirmed with reproducibility, so that the accuracy of deformation detection is further improved.

Furthermore, while the car 10 or the counterweight 11 is running, the calculation unit 25 calculates the speed deviation between the speed command output by the command unit 24 and the actual speed measured by the hoisting machine encoder 13 for the car 10 or the counterweight 11. Calculate sequentially. While the car 10 or the counterweight 11 is running, the determination unit 26 sequentially determines whether the speed deviation deviates from the allowable range based on whether the magnitude of the speed deviation exceeds a first threshold value. At this time, the detection unit 27 determines that the length of the travel section in which the car 10 or the counterweight 11 traveled while the determination unit 26 continuously determined that the speed deviation deviated from the allowable range is a third threshold value. Deformation of the guide rail 5 may be detected when the distance exceeds . The third threshold is a threshold set in advance for the length of the section in which the car 10 or the counterweight 11 travels.

With such a configuration, even if the guide rail 5 is gently deformed over a certain length section, the deformation of the guide rail 5 can be detected based on the speed deviation.

Additionally, the calculation unit 25 may calculate the magnitude of the amount of change over time in the speed deviation. The magnitude of the time change amount of the speed deviation is calculated as, for example, the time derivative of the speed deviation. At this time, the determination unit 26 does not determine that the speed deviation has deviated from the allowable range, regardless of the size of the speed deviation, when the magnitude of the temporal change amount of the speed deviation exceeds the fourth threshold value. The fourth threshold value is a threshold value set in advance for the magnitude of the amount of change over time in the speed deviation of the car 10 or the counterweight 11. For example, the determination unit 26 determines whether the speed deviation deviates from the allowable range regardless of the size of the speed deviation until a preset time has elapsed after the magnitude of the time change amount of the speed deviation exceeds the fourth threshold. It is also possible to maintain a state in which no determination is made.

With this configuration, even if the speed deviation changes rapidly due to vibrations of the car 10 that are not caused by the deformation of the guide rail 5, erroneous detection of deformation of the guide rail 5 due to the change in speed deviation at this time can be avoided. Occurrence can be suppressed. For example, when the elevator system 1 includes a plurality of cars 10, the cars 10 may vibrate due to air currents generated when adjacent cars 10 pass each other, regardless of the deformation of the guide rails 5.

Furthermore, the control panel 12 may cause the car 10 or the counterweight 11 to travel so that the deformation of the guide rail 5 can be detected more reliably based on the determination result by the determination unit 26. For example, when the determination unit 26 determines that the speed deviation has deviated from the allowable range, the control panel 12 controls the car so that the car 10 or the counterweight 11 passes through the position at that time again at the same speed and in the same direction. 10 or a counterweight 11 may be run. Alternatively, when the determination unit 26 determines that the speed deviation has deviated from the allowable range, the control panel 12 may cause the car to pass through the position of the car 10 or the counterweight 11 again at a different speed or in a different direction. 10 or a counterweight 11 may be run.

Next, an example of the hardware configuration of the deformation detection system 23 will be described using FIG. 5.
FIG. 5 is a hardware configuration diagram of the main parts of the deformation detection system 23 according to the first embodiment.

Each function of processing in the deformation detection system 23 can be realized by a processing circuit. The processing circuit includes at least one processor 100a and at least one memory 100b. The processing circuitry may include at least one dedicated hardware 200 along with or in place of the processor 100a and memory 100b.

When the processing circuit includes a processor 100a and a memory 100b, each function of the deformation detection system 23 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 memory 100b. The processor 100a implements each function of the deformation detection system 23 by reading and executing programs stored in the memory 100b.

The processor 100a is also referred to as a CPU (Central Processing Unit), processing device, arithmetic device, microprocessor, microcomputer, or DSP. The memory 100b is configured of a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, and EEPROM.

When the processing circuit comprises dedicated hardware 200, the processing circuit is implemented, for example, as a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

Each function of processing in the deformation detection system 23 can be realized by a processing circuit. Alternatively, each function of the deformation detection system 23 can be realized collectively by a processing circuit. Regarding each function of the deformation detection system 23, some parts may be realized by the dedicated hardware 200, and other parts may be realized by software or firmware. In this way, the processing circuit implements each function of the deformation detection system 23 using dedicated hardware 200, software, firmware, or a combination thereof.

The deformation detection system and deformation detection method according to the present disclosure can be applied to guide rails of elevators.

1. Elevator system, 2. Elevator, 3. Hoistway, 4. Pit, 5. Guide rail, 6. Landing area, 7. Landing door, 8. Hoisting machine, 9. Main rope, 10. Car, 11. Counterweight, 12. Control panel. , 13 Hoist encoder , 14 Car door, 15 Speed governor, 16 Speed governor rope, 17 Speed governor rope tensioner, 18 Speed governor encoder, 19 Earthquake detector, 20 Remote monitoring device, 21 Communication network, 22 Central management device, 23 Deformation detection system, 24 command unit, 25 calculation unit, 26 determination unit, 27 detection unit, 28 notification unit, 100a processor, 100b memory, 200 dedicated hardware

Claims

a command unit that outputs a speed command corresponding to the speed of the elevating body to a hoisting machine that causes the elevating body to travel along a guide rail in an elevator hoistway;
a measurement unit that measures an actual speed corresponding to the speed of the elevating body that is caused to travel by the hoisting machine according to a speed command output by the command unit;
a calculation unit that calculates a speed deviation between the speed command output by the command unit and the actual speed measured by the measurement unit for the elevating body;
a determination unit that determines that the speed deviation of the elevating body has deviated from an allowable range when the magnitude of the speed deviation of the elevating body calculated by the calculation unit exceeds a first threshold value set in advance;
a detection unit that detects deformation of the guide rail based on a determination result of the determination unit;
Elevator guide rail deformation detection system.
The detection unit is configured such that the number of times the determination unit determines that the speed deviation of the elevating body has deviated from a permissible range exceeds a preset second threshold, and the speed deviation of the elevating body has deviated from the permissible range. detecting deformation of the guide rail when the position of the elevating body each time as determined by the determining unit matches within a preset error range;
The elevator guide rail deformation detection system according to claim 1.
The calculation unit calculates a speed deviation between the speed command output by the command unit and the actual speed measured by the measurement unit while the elevating body is traveling;
The determination unit determines whether the speed deviation of the elevating object deviates from an allowable range based on whether the magnitude of the speed deviation of the elevating object exceeds the first threshold while the elevating object is traveling. Determine whether there is
The detecting section is configured to detect a preset length of a running section in which the elevating object traveled while the determining section continuously determines that the speed deviation of the elevating object deviates from an allowable range. 3 detecting deformation of the guide rail when a threshold value is exceeded;
The elevator guide rail deformation detection system according to claim 1.
The determination unit is configured to determine whether or not the determination unit determines whether or not the elevating body changes in speed regardless of the magnitude of the speed deviation of the elevating body when the magnitude of the time change amount of the speed deviation of the elevating body calculated by the calculation unit exceeds a preset fourth threshold value. Does not determine that the speed deviation of the elevating object deviates from the permissible range.
The deformation detection system for an elevator guide rail according to any one of claims 1 to 3.
a command step of outputting a speed command corresponding to the speed of the elevating body to a hoisting machine that causes the elevating body to travel along a guide rail in the hoistway of the elevator;
a measuring step of measuring an actual speed corresponding to the speed of the elevating body that is caused to travel by the hoisting machine according to the speed command output in the command step;
a calculation step of calculating a speed deviation between the speed command output in the command step and the actual speed measured in the measurement step for the elevating body;
a determination step of determining that the speed deviation of the elevating object has deviated from an allowable range when the magnitude of the speed deviation of the elevating object calculated in the calculation step exceeds a first preset threshold;
a detection step of detecting deformation of the guide rail based on the determination result in the determination step;
A method for detecting deformation of an elevator guide rail, comprising: