Elevator system

Abstract

In an elevator system, an acceleration detector detects vertical acceleration, which is acceleration in a vertical direction, generated in a hoist body, and horizontal acceleration, which is acceleration in a horizontal direction, generated in the hoist body, the hoist body being at least either of a car and a counterweight. An estimation object is a long object having flexibility and is connected to the hoist body. A control device has a swing estimation section. The swing estimation section estimates a swing amount of the estimation object based on the vertical acceleration and the horizontal acceleration, and determines whether or not the estimation object has generated an abnormal swing.

Description

Technical Field

[0001] This invention relates to elevator systems. Background Technology

[0002] In existing elevator control devices, the amount of rope sway is estimated based on the building sway detected by a building sway detector and the position of the car. Then, if the estimated amount of rope sway is above a set value, an attenuation layer is set, and the car is moved to the attenuation layer. The attenuation layer is a floor that can attenuate the rope sway (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 5489303 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In existing elevator control systems as described above, the amount of rope sway is estimated based on the building's sway and the car's position. However, the rope sway caused by the building's sway varies depending on the rope's natural frequency. Furthermore, the rope's natural frequency varies depending on the car's position. Therefore, estimating the amount of rope sway based on the building's sway requires very complex calculations.

[0008] The present invention was made to solve the problems mentioned above, and its purpose is to provide an elevator system that can easily estimate the sway of the object being estimated.

[0009] Methods for solving problems

[0010] The elevator system of the present invention comprises an elevator system body, which has an elevator device installed in a building. The elevator device includes: a car; a counterweight; an acceleration detector that detects the vertical acceleration generated in the lifting body (i.e., vertical acceleration) and the horizontal acceleration generated in the lifting body (i.e., horizontal acceleration), the lifting body being at least one of the car and the counterweight; an object to be estimated, which is connected to the lifting body and is a flexible elongated object; and a control device that includes a swing estimation unit that estimates the amount of swing of the object to be estimated based on the vertical acceleration and the horizontal acceleration, and determines whether the object to be estimated has generated abnormal swing.

[0011] Invention Effects

[0012] The elevator system according to the present invention can easily estimate the amount of sway of the object being estimated. Attached Figure Description

[0013] Figure 1 This is a schematic structural diagram of the elevator system according to Embodiment 1.

[0014] Figure 2 It is shown Figure 1 A block diagram of the control system of the elevator system.

[0015] Figure 3 It is shown schematically. Figure 1 A diagram illustrating the swinging motion produced by multiple main ropes.

[0016] Figure 4 It is shown Figure 2 A flowchart of the operation of the control device.

[0017] Figure 5 This is a schematic structural diagram of the elevator system according to Embodiment 2.

[0018] Figure 6 It is shown Figure 5 A block diagram of the control system of the elevator system.

[0019] Figure 7 It is shown Figure 6 A flowchart of the operation of the control device.

[0020] Figure 8 This is a schematic structural diagram of an example of the elevator system of Embodiment 3.

[0021] Figure 9 It is shown Figure 8 A block diagram of the control system of the elevator system.

[0022] Figure 10 This is a structural diagram showing a first example of a processing circuit that implements the functions of the control device in embodiments 1 to 3.

[0023] Figure 11 This is a structural diagram of a second example of a processing circuit that implements the functions of the control device in embodiments 1 to 3. Detailed Implementation

[0024] The embodiments will now be described with reference to the accompanying drawings.

[0025] Implementation method 1.

[0026] Figure 1 This is a schematic structural diagram showing the elevator system of Embodiment 1. Figure 1 In the building 50, a shaft 51 and a machine room 52 are provided. The machine room 52 is located above the shaft 51.

[0027] The elevator system of Embodiment 1 includes an elevator system body 30. The elevator system body 30 is installed in a building 50. The elevator system body 30 of Embodiment 1 has one elevator device 31. That is, the elevator system body 30 of Embodiment 1 consists of only one elevator device 31.

[0028] The elevator unit 31 includes a traction machine 11, a deflector sheave 13, multiple main ropes 14, a car 15, a counterweight 16, multiple compensating ropes 17, a balance sheave 18, a car acceleration detector 19, and a control device 20.

[0029] The traction machine 11 is located in the machine room 52. Furthermore, the traction machine 11 includes a drive sheave 12, a traction machine motor (not shown), and a traction mechanism brake (not shown). The traction machine motor rotates the drive sheave 12. The traction mechanism brake keeps the drive sheave 12 stationary. Additionally, the traction mechanism brakes the rotation of the drive sheave 12.

[0030] Multiple main ropes 14 are wound around the drive pulley 12 and the deflector pulley 13. Figure 1 Only one main rope 14 is shown in the diagram. The car 15 is connected to the first ends of the multiple main ropes 14. The counterweight 16 is connected to the second ends of the multiple main ropes 14.

[0031] The car 15 and counterweight 16 are suspended within the hoistway 51 by multiple main ropes 14. Furthermore, the car 15 and counterweight 16 are raised and lowered within the hoistway 51 by rotating the drive sheave 12.

[0032] A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 51. The pair of car guide rails guide the raising and lowering of the car 15. The pair of counterweight guide rails guide the raising and lowering of the counterweight 16.

[0033] Multiple compensating ropes 17 are suspended between the lower part of the car 15 and the lower part of the counterweight 16. Figure 1 Only one compensating rope 17 is shown in the diagram. Multiple compensating ropes 17 compensate for the weight imbalance of multiple main ropes 14 on one side and the other side of the drive pulley 12.

[0034] A balance wheel 18 is located at the bottom of the shaft 51. Multiple compensation ropes 17 are wound around the balance wheel 18. The balance wheel 18 applies tension to the multiple compensation ropes 17.

[0035] A car acceleration detector 19 is installed in the car 15. In Embodiment 1, the lifting body is the car 15. The car acceleration detector 19 detects the vertical acceleration ACv0 and horizontal acceleration ACh0 of the car 15. The vertical acceleration ACv0 is the acceleration generated in the vertical direction within the car 15. The horizontal acceleration ACh0 is the acceleration generated in the horizontal direction within the car 15.

[0036] Multiple main ropes 14 and multiple compensating ropes 17 are respectively connected to the car 15. Furthermore, the multiple main ropes 14 and multiple compensating ropes 17 are flexible long strips. The objects of estimation in Embodiment 1 are the multiple main ropes 14 and multiple compensating ropes 17.

[0037] The signal from the car acceleration detector 19 is sent to the control unit 20. The control unit 20 is located in the machine room 52.

[0038] Figure 2 It is shown Figure 1 A block diagram of the control system of the elevator system. As a functional block, the control device 20 has an operation control unit 21 and a swing estimation unit 22.

[0039] The operation control unit 21 controls the operation of the car 15 by controlling the traction machine 11. Furthermore, the operation control unit 21 controls the operation of the car 15 through multiple operation modes. These multiple operation modes include a normal operation mode and a controlled operation mode.

[0040] The normal operating mode is the mode in which the car 15 operates normally. Normal operating mode is an operating method in which the car 15 is automatically moved to the destination floor based on the call from inside the car 15 and the call from multiple floors.

[0041] The controlled operation mode is the operation mode for controlling the operation of the car 15. Controlled operation is an operation method that moves the car 15 to a position that suppresses the swaying of the estimated object.

[0042] The car acceleration detector 19 detects the vertical acceleration ACv0 and the horizontal acceleration ACh0 respectively, and outputs the signals corresponding to the vertical acceleration ACv0 and the horizontal acceleration ACh0 to the oscillation estimation unit 22 respectively.

[0043] The sway estimation unit 22 estimates the sway amount of the object to be estimated based on the vertical acceleration ACv0 and horizontal acceleration ACh0 detected by the car acceleration detector 19, and determines whether the object to be estimated has produced abnormal sway.

[0044] Figure 3 It is shown schematically in Figure 1 A diagram illustrating the swinging motion generated by the multiple main ropes 14. Due to an earthquake or strong wind occurring at a distant location, long-period vibrations occur in building 50. At this time, building 50 swings at its natural frequency. Therefore, the vibration frequency of building 50 during long-period vibrations is relatively low. Furthermore, long-period vibrations mostly last for a long time.

[0045] When the multiple main ropes 14 resonate with the long-period vibration of the building 50, even if the sway of the building 50 is small, the sway of the multiple main ropes 14 will gradually increase. As the sway of the multiple main ropes 14 increases, a vertical vibration is generated in the car 15 corresponding to this amount of sway. That is, as the sway of the multiple main ropes 14 increases, a vertical vibration is generated in the car 15 corresponding to the amplitude of the horizontal sway of the multiple main ropes 14.

[0046] Furthermore, when the building 50 vibrates horizontally, the equipment inside the hoistway 51 also experiences horizontal vibration. Thus, when the building 50 experiences long-period vibration, the car 15 simultaneously experiences both vertical and horizontal vibration.

[0047] On the other hand, the vertical vibration of the car 15 also occurs when passengers enter the car 15. Therefore, it is not possible to determine whether the object being estimated has swayed based solely on the vertical vibration.

[0048] Therefore, the sway estimation unit 22 estimates the amount of sway of the estimated object caused by the sway of the building 50 based on the vertical and horizontal vibrations generated in the car 15, and determines whether there is any abnormal sway of the estimated object caused by the sway of the building 50, such as long-period vibration.

[0049] Here, the oscillation estimation unit 22 is equipped with a first frequency band and a second frequency band. The first frequency band and the second frequency band are respectively set according to one natural cycle of the building 50.

[0050] Specifically, the first frequency band is the frequency band that includes the inherent frequency of building 50. In addition, the second frequency band is the frequency band that includes half of the inherent frequency of building 50.

[0051] When a long-period vibration occurs in the building 50, the building 50 vibrates at its natural frequency. Therefore, the car 15 in the hoistway 51 also vibrates horizontally at the natural frequency of the building 50. Therefore, the oscillation estimation unit 22 performs filtering processing, such as bandpass filtering processing, to extract the first frequency band component from the horizontal acceleration ACh0 detected by the car acceleration detector 19, and calculates the horizontal acceleration ACh1.

[0052] Furthermore, the vertical acceleration ACv0 detected by the car acceleration detector 19 includes gravitational acceleration. Therefore, the sway estimation unit 22 removes the amount of gravitational acceleration from the vertical acceleration ACv0. The amount of gravitational acceleration removed can be obtained by directly subtracting the magnitude of gravitational acceleration, or by subtracting the average value of gravitational acceleration over a predetermined period of time while the car 15 is stationary.

[0053] Furthermore, since the swaying of the object being estimated is generated by resonance with the long-period vibration of the building 50, the object being estimated also oscillates at the natural frequency of the building 50. Moreover, the vertical vibration of the car 15 corresponds to the amplitude of the object being estimated in the horizontal direction. Therefore, the frequency of the vertical vibration of the car 15 is generated at a frequency corresponding to the swaying frequency of the object being estimated, i.e., the natural frequency of the building 50.

[0054] The frequency of the vertical vibration of the car 15 caused by the swaying of the estimated object is half the natural frequency of the building 50. Therefore, the sway estimation unit 22 performs filtering processing, such as bandpass filtering processing, to extract the second frequency band component from the vertical acceleration ACv0 after removing the gravitational acceleration, and calculates the vertical acceleration ACv1.

[0055] Then, the sway estimation unit 22 estimates the sway amount of the estimated object based on the filtered vertical acceleration ACv1 and the filtered horizontal acceleration ACh1, and determines whether the estimated object has produced abnormal sway.

[0056] The sway estimation unit 22 is equipped with a first vertical threshold LCv1, a first horizontal threshold LCh1, a second vertical threshold LCv2, and a second horizontal threshold LCh2.

[0057] The first vertical threshold LCv1 and the second vertical threshold LCv2 are the criteria for determining the vertical acceleration ACv1 of the car 15. Furthermore, the second vertical threshold LCv2 is greater than the first vertical threshold LCv1. That is, LCv2 > LCv1.

[0058] The first horizontal threshold LCh1 and the second horizontal threshold LCh2 are the criteria for determining the horizontal acceleration ACh1 of the car 15. Furthermore, the second horizontal threshold LCh2 is less than the first horizontal threshold LCh1. That is, LCh2 < LCh1.

[0059] When the vertical acceleration ACv1 is greater than or equal to the first vertical threshold LCv1 and the horizontal acceleration ACh1 is greater than or equal to the first horizontal threshold LCh1, the sway estimation unit 22 determines that the estimated object has produced an abnormal sway.

[0060] At this time, the sway estimation unit 22 may also determine that the estimated object has swayed abnormally if the state in which the vertical acceleration ACv1 is above the first vertical direction threshold LCv1 and the horizontal acceleration ACh1 is above the first horizontal direction threshold LCh1 has continued for a set time or more.

[0061] The first vertical threshold LCv1 is set to a size such that the estimated object will not collide with the equipment in the shaft 51 due to the swing of the estimated object.

[0062] The first horizontal threshold LCh1 is set to be able to estimate the magnitude of the sway of the estimated object as caused by the sway of the building 50.

[0063] When the swing estimation unit 22 determines that the object being estimated has an abnormal swing, the operation control unit 21 sets the operation mode to the control operation mode.

[0064] If the vertical acceleration ACv1 is above the second vertical threshold LCv2, the sway estimation unit 22 determines that the estimated object has swayed too much.

[0065] When the sway estimation unit 22 determines that the estimated object has swayed too much, the operation control unit 21 does not set the operation mode to the control operation mode, but stops the car 15 at the nearest floor and stops the operation of the car 15.

[0066] When the sway estimation unit 22 determines that the horizontal acceleration ACh1 is less than the second horizontal threshold LCh2 when the operating mode is the controlled operating mode, the operating control unit 21 returns the operating mode to the normal operating mode. The second horizontal threshold LCh2 is a threshold used to detect the swaying of the building 50.

[0067] At this time, the oscillation estimation unit 22 can also determine that the horizontal acceleration ACh1 is less than the second horizontal direction threshold LCh2 if the state of the horizontal acceleration ACh1 being less than the second horizontal direction threshold LCh2 has continued for a set time or more.

[0068] Figure 4 It is shown Figure 2 A flowchart illustrating the operation of the control device 20. The control device 20 repeatedly executes [the following commands] during the normal operation of the car 15. Figure 4 The processing.

[0069] In step S101, the control device 20 determines whether the vertical acceleration ACv1 is greater than or equal to the first vertical threshold LCv1. If the vertical acceleration ACv1 is less than the first vertical threshold LCv1, the control device 20 maintains the normal operation mode in step S107 and terminates the process.

[0070] If the vertical acceleration ACv1 is greater than or equal to the first vertical threshold LCv1, the control device 20 determines in step S102 whether the horizontal acceleration ACh1 is greater than or equal to the first horizontal threshold LCh1. If the horizontal acceleration ACh1 is less than the first horizontal threshold LCh1, the control device 20 maintains the normal operation mode in step S107 and terminates the process.

[0071] If the horizontal acceleration ACh1 is greater than or equal to the first horizontal threshold LCh1, the control device 20 moves the car 15 to the nearest floor in step S103. Then, the passengers in the car 15 are moved to the landing, and the car 15 is emptied.

[0072] Then, in step S104, the control device 20 determines whether the vertical acceleration ACv1 is less than the second vertical threshold LCv2. If the vertical acceleration ACv1 is less than the second vertical threshold LCv2, the control device 20 performs controlled operation in step S105.

[0073] During controlled operation, the control device 20, for example, moves the car 15 to a non-resonant floor and stops it with the doors closed. A non-resonant floor is a floor where it is estimated that the object will not resonate with the swaying of the building 50.

[0074] Then, in step S106, the control device 20 determines whether the horizontal acceleration ACh1 is less than the second horizontal threshold LCh2. If the horizontal acceleration ACh1 is not less than the second horizontal threshold LCh2, the control device 20 returns to the processing in step S104.

[0075] If the horizontal acceleration ACh1 is less than the second horizontal threshold LCh2, the control device 20 returns the operation mode to the normal operation mode in step S107 and ends the process.

[0076] In step S104, if the vertical acceleration ACv1 is not less than the second vertical threshold LCv2, that is, if the vertical acceleration ACv1 is greater than or equal to the second vertical threshold LCv2, the control device 20 stops the operation of the car 15 in step S108.

[0077] Then, in step S109, the control device 20 determines whether the maintenance personnel have completed the restoration work. The control device 20 stops the operation of the car 15 until the restoration work is completed. When the restoration work is completed, the control device 20 returns the operation mode to the normal operation mode in step S107 and ends the process.

[0078] In such an elevator system, the sway estimation unit 22 estimates the amount of sway of the object to be estimated based on the vertical acceleration ACv1 and the horizontal acceleration ACh1, and determines whether the object to be estimated has experienced abnormal swaying. Therefore, without using the position of the car 15 as a variable, the amount of sway of the object to be estimated can be easily estimated through simple calculations.

[0079] Furthermore, the sway of the object being estimated can be easily estimated based on the vertical acceleration ACv1 of the car 15. Moreover, by confirming whether the building 50 is swaying based on the horizontal acceleration ACh1 of the car 15, the occurrence of swaying of the object being estimated can be detected with high precision. This allows for the suppression of service degradation caused by unnecessary control operations.

[0080] Furthermore, the sway estimation unit 22 performs filtering processing to extract a first frequency band component from the horizontal acceleration ACh0 detected by the car acceleration detector 19. Additionally, the sway estimation unit 22 performs filtering processing to extract a second frequency band component from the vertical acceleration ACv0 detected by the car acceleration detector 19. Then, the sway estimation unit 22 estimates the sway amount of the object to be estimated based on the filtered vertical acceleration ACv1 and the filtered horizontal acceleration ACh1.

[0081] Therefore, factors other than the swaying of the building 50, such as the vibration caused by passengers entering the car 15, can be removed, thereby enabling a more accurate estimation of the amount of swaying of the object being estimated due to the swaying of the building 50.

[0082] Furthermore, if the vertical acceleration ACv1 is greater than or equal to the first vertical threshold LCv1 and the horizontal acceleration ACh1 is greater than or equal to the first horizontal threshold LCh1, the sway estimation unit 22 determines that the estimated object has produced an abnormal sway.

[0083] Therefore, it is possible to determine with high accuracy whether there is any abnormal swaying of the estimated object caused by the swaying of building 50. As a result, it is possible to suppress service degradation caused by unnecessary control operations.

[0084] Furthermore, when the sway estimation unit 22 determines that the object being estimated is swaying abnormally, the operation control unit 21 sets the operation mode to the control operation mode. Therefore, the sway of the object being estimated can be efficiently attenuated.

[0085] Furthermore, if the vertical acceleration ACv1 is above the second vertical threshold LCv2, the sway estimation unit 22 determines that the estimated object has swayed excessively. Then, when the sway estimation unit 22 determines that the estimated object has swayed excessively, the operation control unit 21 does not set the operation mode to the controlled operation mode, but stops the car 15 at the nearest floor and stops the operation of the car 15.

[0086] Therefore, it is possible to suppress secondary damage caused by operating the system while the object being estimated is still experiencing excessive oscillation.

[0087] Furthermore, when the sway estimation unit 22 determines that the horizontal acceleration ACh1 is less than the second horizontal threshold LCh2 when the operating mode is the controlled operating mode, the operating control unit 21 returns the operating mode to the normal operating mode. As a result, the operating mode can be smoothly switched to the normal operating mode after the sway of the building 50 has subsided.

[0088] Furthermore, in the above example, if the vertical acceleration ACv1 is greater than or equal to the second vertical threshold LCv2, it is determined that the estimated object has generated excessive swaying. However, it is also possible to determine that the estimated object has generated excessive swaying if the horizontal acceleration ACh1 is greater than or equal to the third horizontal threshold LCh3. In this case, a third horizontal threshold ACh3 greater than the first horizontal threshold LCh1 is set in the sway estimation unit 22.

[0089] Furthermore, in the above example, the swaying of building 50 is determined to have subsided when the horizontal acceleration ACh1 is less than the second horizontal threshold LCh2. However, the swaying of building 50 can also be determined to have subsided when the vertical acceleration ACv1 is less than the third vertical threshold LCv3. In this case, the sway estimation unit 22 sets a third vertical threshold LCv3 that is less than the first vertical threshold LCv1.

[0090] Implementation method 2.

[0091] Next, Figure 5 This is a schematic structural diagram of the elevator system according to Embodiment 2. In addition to having the same structure as the elevator system 31 in Embodiment 1, the elevator device 31 of Embodiment 2 also includes a counterweight acceleration detector 23.

[0092] A counterweight acceleration detector 23 is installed on the counterweight 16. In Embodiment 2, both the car 15 and the counterweight 16 are lifting bodies. The counterweight acceleration detector 23 detects the vertical acceleration AMv0 and the horizontal acceleration AMh0 of the counterweight 16. The vertical acceleration AMv0 is the acceleration generated in the vertical direction in the counterweight 16. The horizontal acceleration AMh0 is the acceleration generated in the horizontal direction in the counterweight 16.

[0093] The signal from the counter-acceleration detector 23 is sent to the control device 20.

[0094] Figure 6 It is shown Figure 5 The block diagram of the control system of the elevator system. The counterweight acceleration detector 23 detects the vertical acceleration AMv0 and the horizontal acceleration AMh0 respectively, and outputs the signals corresponding to the vertical acceleration AMv0 and the horizontal acceleration AMh0 respectively to the oscillation estimation unit 22.

[0095] The sway estimation unit 22 estimates the sway amount of the object to be estimated based on the vertical acceleration ACv0 and the horizontal acceleration ACh0, as well as the vertical acceleration AMv0 and the horizontal acceleration AMh0, and determines whether the object to be estimated has produced abnormal sway.

[0096] The oscillation estimation unit 22 performs filtering processing, such as bandpass filtering processing, to extract the first frequency band component from the horizontal acceleration AMh0 detected by the counterweight acceleration detector 23, and calculates the horizontal acceleration AMh1.

[0097] In addition, the oscillation estimation unit 22 removes the amount of gravitational acceleration from the vertical acceleration AMv0 detected by the counterweight acceleration detector 23.

[0098] In addition, the oscillation estimation unit 22 performs filtering processing, such as bandpass filtering processing, to extract the second frequency band component from the vertical acceleration AMv0 after removing the gravitational acceleration, and calculates the vertical acceleration AMv1.

[0099] Then, the sway estimation unit 22 estimates the sway of the object to be estimated based on the filtered vertical acceleration ACv1, the filtered horizontal acceleration ACh1, the filtered vertical acceleration AMv1, and the filtered horizontal acceleration AMh1.

[0100] The sway estimation unit 22 is equipped with a first car vertical direction threshold LCv1, a first car horizontal direction threshold LCh1, a second car vertical direction threshold LCv2, and a second car horizontal direction threshold LCh2.

[0101] The vertical threshold LCv1 of the first car is the same as the first vertical threshold LCv1 of Embodiment 1. The horizontal threshold LCh1 of the first car is the same as the first horizontal threshold LCh1 of Embodiment 1. The vertical threshold LCv2 of the second car is the same as the second vertical threshold LCv2 of Embodiment 1. The horizontal threshold LCh2 of the second car is the same as the second horizontal threshold LCh2 of Embodiment 1.

[0102] In addition, the swing estimation unit 22 is equipped with a first vertical weight threshold LMv1, a first horizontal weight threshold LMh1, a second vertical weight threshold LMv2, and a second horizontal weight threshold LMh2.

[0103] The first vertical threshold LMv1 and the second vertical threshold LMv2 are the criteria for determining the vertical acceleration AMv1 of the 16-weight pair. Furthermore, the second vertical threshold LMv2 is greater than the first vertical threshold LMv1. That is, LMv2 > LMv1.

[0104] The first horizontal threshold LMh1 and the second horizontal threshold LMh2 are the criteria for determining the horizontal acceleration AMh1 of the 16-weight pair. Furthermore, the second horizontal threshold LMh2 is less than the first horizontal threshold LMh1. That is, LMh2 < LMh1.

[0105] Here, the state in which at least one of the following conditions is satisfied is defined as the first condition satisfied state: the vertical acceleration ACv1 of the car 15 is greater than or equal to the first vertical threshold LCv1 of the car and the vertical acceleration AMv1 of the counterweight 16 is greater than or equal to the first vertical threshold LMv1 of the counterweight.

[0106] Furthermore, the state in which the horizontal acceleration ACh1 of the car 15 is greater than or equal to the first horizontal threshold LCh1 of the car and the horizontal acceleration AMh1 of the counterweight 16 is greater than or equal to the first horizontal threshold LMh1 of the counterweight is defined as the state in which the second condition is met.

[0107] When both the first and second conditions are met, the oscillation estimation unit 22 determines that the object being estimated has produced an abnormal oscillation.

[0108] At this time, the oscillation estimation unit 22 can also determine that the object being estimated has oscillated abnormally if the first condition is satisfied and the second condition is satisfied for a set time or more.

[0109] The first vertical threshold LMv1 is set to a size such that the estimated object will not collide with the equipment in the shaft 51 due to the swing of the estimated object.

[0110] The first horizontal threshold LMh1 is set to be able to estimate the magnitude of the sway of the estimated object as caused by the sway of the building 50.

[0111] When the swing estimation unit 22 determines that the object being estimated has an abnormal swing, the operation control unit 21 sets the operation mode to the control operation mode.

[0112] If the vertical acceleration ACv1 of the car 15 is greater than or equal to the vertical threshold LCv2 of the second car, or the vertical acceleration AMv1 of the counterweight 16 is greater than or equal to the vertical threshold LMv2 of the second counterweight, the sway estimation unit 22 determines that the estimated object has swayed excessively.

[0113] When the sway estimation unit 22 determines that the estimated object has swayed too much, the operation control unit 21 does not set the operation mode to the control operation mode, but stops the car 15 at the nearest floor and stops the operation of the car 15.

[0114] In addition, the state in which the horizontal acceleration ACh1 of the car 15 is less than the second horizontal threshold LCh2 of the car and the horizontal acceleration AMh1 of the counterweight 16 is less than the second horizontal threshold LMh2 of the counterweight is set as the state in which the third condition is met.

[0115] When the sway estimation unit 22 determines that the third condition has been met while the operating mode is the controlled operating mode, the operation control unit 21 returns the operating mode to the normal operating mode. The second car horizontal threshold LCh2 and the second counterweight horizontal threshold LMh2 are thresholds used to detect the swaying of the building 50.

[0116] At this time, the swing estimation unit 22 can also determine that the third condition has been satisfied if the third condition has been satisfied for a set time or longer.

[0117] Figure 7 It is shown Figure 6 A flowchart illustrating the operation of the control device 20. The control device 20 repeatedly executes [the following commands] during the normal operation of the car 15. Figure 7 The processing.

[0118] In step S201, the control device 20 determines whether the first condition is met. If the first condition is not met, the control device 20 maintains the normal operation mode in step S207 and terminates the process.

[0119] If the first condition is met, the control device 20 determines in step S202 whether the second condition is met. If the second condition is not met, the control device 20 maintains the normal operation mode in step S207 and terminates the process.

[0120] When the second condition is met, the control device 20 moves the car 15 to the nearest floor in step S203. Then, the passengers in the car 15 are moved to the landing, and the car 15 is emptied.

[0121] Then, in step S204, the control device 20 determines whether the vertical acceleration ACv1 of the car 15 is less than the second car vertical direction threshold LCv2 and whether the vertical acceleration AMv1 of the counterweight 16 is less than the second counterweight vertical direction threshold LMv2. If the vertical acceleration ACv1 of the car 15 is less than the second car vertical direction threshold LCv2 and the vertical acceleration AMv1 of the counterweight 16 is less than the second counterweight vertical direction threshold LMv2, the control device 20 performs controlled operation in step S205.

[0122] During controlled operation, the control device 20, for example, moves the car 15 to a non-resonant floor and keeps it in a closed position until it stops.

[0123] Then, in step S206, the control device 20 determines whether the horizontal acceleration ACh1 of the car 15 is less than the second horizontal threshold LCh2 of the car and whether the horizontal acceleration AMh1 of the counterweight 16 is less than the second horizontal threshold LMh2 of the counterweight. If the condition that the horizontal acceleration ACh1 of the car 15 is less than the second horizontal threshold LCh2 of the car and the horizontal acceleration AMh1 of the counterweight 16 is less than the second horizontal threshold LMh2 of the counterweight is not met, the control device 20 returns to the processing of step S204.

[0124] If the horizontal acceleration ACh1 of the car 15 is less than the second car horizontal threshold LCh2 and the horizontal acceleration AMh1 of the counterweight 16 is less than the second counterweight horizontal threshold LMh2, then the control device 20 returns the operation mode to the normal operation mode in step S207 and ends the process.

[0125] In step S204, if the vertical acceleration ACv1 of the car 15 is greater than or equal to the second car vertical direction threshold LCv2, the control device 20 stops the operation of the car 15 in step S208. Furthermore, if the vertical acceleration AMv1 of the counterweight 16 is greater than or equal to the second counterweight vertical direction threshold LMv2 in step S204, the control device 20 also stops the operation of the car 15 in step S208.

[0126] Then, in step S209, the control device 20 determines whether the maintenance personnel have completed the restoration work. The control device 20 stops the operation of the car 15 until the restoration work is completed. When the restoration work is completed, the control device 20 returns the operation mode to the normal operation mode in step S207 and ends the process.

[0127] remove Figure 5 and Figure 6 The structure shown and Figure 7 Apart from the actions shown, the structure and operation of the elevator system are the same as in Implementation Method 1.

[0128] According to such an elevator system, the same effect as in Embodiment 1 can be obtained. Furthermore, since the vertical acceleration ACv1 and horizontal acceleration ACh1 of the car 15 are used in addition to the vertical acceleration AMv1 and horizontal acceleration AMh1 of the counterweight 16, the estimation accuracy of the sway of the object can be improved.

[0129] Furthermore, when the sway estimation unit 22 is in both the first and second condition satisfied states, it determines that the object being estimated has experienced abnormal swaying. Therefore, the accuracy of determining abnormal swaying of the object being estimated can be improved. This, in turn, can suppress service degradation caused by unnecessary control operations.

[0130] Implementation method 3.

[0131] Next, the elevator system of Embodiment 3 will be described. The main body of the elevator system of Embodiment 3 has two or more elevator units. When estimating the amount of sway of the corresponding estimated object, the sway estimation unit in each elevator unit also refers to the signal from the acceleration detector in the other elevator units.

[0132] The lifting components in each elevator unit are the car and the counterweight.

[0133] When the sway estimation unit in each elevator device is in both the first and second condition satisfied states, it determines that the object being estimated has experienced abnormal swaying. At this time, the sway estimation unit 22 can also determine that the object being estimated has experienced abnormal swaying if the first and second condition satisfied states have continued for a set time or longer.

[0134] The first condition is satisfied when at least one of the following conditions is met: the vertical acceleration of the corresponding car is greater than or equal to the vertical acceleration of the first car in the vertical direction threshold, and the vertical acceleration of the corresponding counterweight is greater than or equal to the vertical acceleration of the first counterweight in the vertical direction threshold.

[0135] The second condition is met when the horizontal acceleration of two or more of the elevator bodies in all elevator devices is above the corresponding threshold of the first car horizontal direction threshold and the first counterweight horizontal direction threshold.

[0136] Figure 8 This is a schematic structural diagram illustrating an example of the elevator system of Embodiment 3. Figure 9 It is shown Figure 8 A block diagram of the control system of the elevator system.

[0137] exist Figure 8 In the middle, two elevator units 31 and 31a are installed at building 50. That is, Figure 8 The main body 30 of the elevator system has two elevator devices 31 and 31a. The structure of each elevator device 31 and 31a is the same as that of elevator device 31 in embodiment 2.

[0138] exist Figure 8 and Figure 9 In this embodiment, the structural designations related to elevator device 31 are the same as those in embodiment 2. Figure 8 and Figure 9 In the text, the structural designations related to elevator device 31a are the same as those in embodiment 2, but with the addition of the designation "a".

[0139] When estimating the amount of sway of the object to be estimated included in the elevator device 31, the sway estimation unit 22 also refers to signals from the car acceleration detector 19a and the counterweight acceleration detector 23a. When estimating the amount of sway of the object to be estimated included in the elevator device 31a, the sway estimation unit 22a also refers to signals from the car acceleration detector 19a and the counterweight acceleration detector 23a.

[0140] The first condition satisfaction state in the sway estimation unit 22 of the elevator device 31 is as follows. That is, the first condition satisfaction state is a state that satisfies at least one of the following conditions: the vertical acceleration ACv1 of the car 15 is greater than or equal to the first vertical direction threshold LCv1 of the car and the vertical acceleration AMv1 of the counterweight 16 is greater than or equal to the first vertical direction threshold LMv1 of the counterweight.

[0141] The first condition satisfaction state in the sway estimation unit 22a of the elevator device 31a is as follows. That is, the first condition satisfaction state is a state that satisfies at least one of the following conditions: the vertical acceleration ACv1 of the car 15a is greater than or equal to the first vertical direction threshold LCv1 of the car and the vertical acceleration AMv1 of the counterweight 16a is greater than or equal to the first vertical direction threshold LMv1 of the counterweight.

[0142] The second condition satisfaction states of each of the sway estimation unit 22 and sway estimation unit 22a are as follows. That is, the second condition satisfaction state is the state in which the horizontal accelerations ACh1 or AMh1 of two or more of the car 15, counterweight 16, car 15a and counterweight 16a are greater than or equal to the corresponding horizontal direction thresholds LCh1 or LMh1.

[0143] When both the first and second conditions are met, the sway estimation unit 22 determines that the estimated object included in the elevator device 31 is swaying abnormally. When both the first and second conditions are met, the sway estimation unit 22a determines that the estimated object included in the elevator device 31a is swaying abnormally.

[0144] Except for the fact that the main body of the elevator system has more than two elevator devices and the function of the swing estimation unit in each elevator device, the structure and operation of the elevator system are the same as those in implementation method 2.

[0145] In such an elevator system, the sway estimation unit in each elevator unit also refers to signals from acceleration detectors in other elevator units when estimating the sway amount of the corresponding estimated object. Therefore, the detection accuracy of the building 50's sway can be improved, as can the estimation accuracy of the estimated object's sway amount.

[0146] Furthermore, when determining whether the corresponding estimated object has experienced abnormal swaying, the sway estimation unit in each elevator unit refers to the horizontal acceleration of the lifting body in all elevator units. Therefore, the detection accuracy of the building 50's swaying can be further improved, and the estimation accuracy of the sway amount of the estimated object can be further improved.

[0147] In addition, in embodiment 3, the elevator system body 30 may also include three or more elevator devices 31.

[0148] Furthermore, in embodiment 1, the elevator system body 30 may also include two or more elevator devices 31.

[0149] Furthermore, in embodiments 1 to 3, the object of estimation may also be a speed limiter rope (not shown). Additionally, when multiple straps are used instead of multiple main ropes, the object of estimation may also be multiple straps. That is, the object of estimation is a rope or a strap.

[0150] In addition, in embodiments 1 to 3, a device acceleration detector may also be installed in other devices that are in contact with the object being estimated, such as the balance wheel 18, and the signal from the device acceleration detector may be referenced when estimating the amount of sway of the object being estimated.

[0151] Furthermore, in embodiments 1 to 3, the layout of the elevator device 31 is not limited to... Figure 1 The layout. For example, the rope winding method can also be a 2:1 rope winding method.

[0152] In addition, the elevator unit 31 can also be a machine-room-less elevator, a double-deck elevator, or a single-shaft multi-car elevator. The single-shaft multi-car type is a method in which the upper car and the lower car located directly below the upper car rise and fall independently in a shared shaft.

[0153] Furthermore, each function of the control device 20 in embodiments 1 to 3 is implemented by a processing circuit. Figure 10 This is a structural diagram of a first example of a processing circuit that implements the functions of the control device 20 in embodiments 1 to 3. The processing circuit 100 in the first example is dedicated hardware.

[0154] Furthermore, the processing circuit 100 may be equivalent to a single circuit, a composite circuit, a programming processor, a parallel programming processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. Additionally, the various functions of the control device 20 can be implemented separately by the independent processing circuit 100, or the various functions can be implemented uniformly by the processing circuit 100.

[0155] also, Figure 11 This is a structural diagram of a second example of a processing circuit that implements the functions of the control device 20 in embodiments 1 to 3. The processing circuit 200 in the second example includes a processor 201 and a memory 202.

[0156] In the processing circuit 200, the functions of the control device 20 are implemented through software, firmware, or a combination of software and firmware. The software and firmware are described as programs and stored in the memory 202. The processor 201 implements the functions by reading and executing the programs stored in the memory 202.

[0157] The program stored in memory 202 can also be described as a program that causes the computer to execute the steps or methods described above. Here, memory 202 is, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read-Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), or EEPROM (Electrically Erasable Programmable Read Only Memory). Furthermore, disks, floppy disks, optical disks, CDs (compact disks), mini discs, and DVDs (Digital Versatile Disk) also correspond to memory 202.

[0158] In addition, some of the functions of the above-mentioned parts can be implemented through dedicated hardware, while others can be implemented through software or firmware.

[0159] In this way, the processing circuit can implement the functions of the above-mentioned parts through hardware, software, firmware, or a combination thereof.

[0160] Label Explanation

[0161] 14, 14a: Main rope (object to be estimated); 15, 15a: Car (lifting body); 16, 16a: Counterweight (lifting body); 17, 17a: Compensating rope (object to be estimated); 19, 19a: Car acceleration detector; 20, 20a: Control device; 21, 21a: Operation control unit; 22, 22a: Swing estimation unit; 23, 23a: Counterweight acceleration detector; 30: Main body of elevator system; 31, 31a: Elevator unit; 50: Building.

Claims

1. An elevator system, wherein, The elevator system comprises an elevator system body, which includes an elevator device installed in the building. The elevator device has: The car; Counterweight; An acceleration detector detects the vertical acceleration generated in the lifting body and the horizontal acceleration generated in the lifting body, wherein the lifting body is at least one of the car and the counterweight. The estimated object, which is connected to the lifting body, is a flexible, elongated object; and Control device, The control device has a swing estimation unit. The sway estimation unit estimates the amount of sway of the estimated object based on the vertical acceleration and the horizontal acceleration, and determines whether the estimated object has produced abnormal sway.

2. The elevator system according to claim 1, wherein, In the oscillation estimation unit, a first frequency band and a second frequency band are respectively set according to one natural period of the building. The oscillation estimation unit performs filtering processing to extract the first frequency band component from the horizontal acceleration detected by the accelerometer, and performs filtering processing to extract the second frequency band component from the vertical acceleration detected by the accelerometer. The sway estimation unit estimates the sway amount of the estimated object based on the filtered vertical acceleration and the filtered horizontal acceleration, and determines whether the estimated object has produced abnormal sway.

3. The elevator system according to claim 1 or 2, wherein, The oscillation estimation unit is equipped with a first vertical direction threshold as a criterion for determining the vertical acceleration and a first horizontal direction threshold as a criterion for determining the horizontal acceleration. When the vertical acceleration is above the first vertical threshold and the horizontal acceleration is above the first horizontal threshold, the sway estimation unit determines that the estimated object has produced an abnormal sway.

4. The elevator system according to claim 3, wherein, The control device also includes an operation control unit, which controls the operation of the car through multiple operation modes, including a normal operation mode and a controlled operation mode. The control operation mode is the operation mode that moves the car to a position that suppresses the swaying of the estimated object. When the swing estimation unit determines that the estimated object has an abnormal swing, the operation control unit sets the operation mode to the controlled operation mode.

5. The elevator system according to claim 4, wherein, In the oscillation estimation unit, a second vertical direction threshold greater than the first vertical direction threshold is set as the determination criterion for the vertical acceleration. If the vertical acceleration is above the second vertical threshold, the sway estimation unit determines that the estimated object has produced excessive sway. When the sway estimation unit determines that the estimated object has swayed too much, the operation control unit does not set the operation mode to the controlled operation mode, but stops the car at the nearest floor and stops the operation of the car.

6. The elevator system according to claim 4 or 5, wherein, In the oscillation estimation unit, a second horizontal direction threshold, which is less than the first horizontal direction threshold, is set as the criterion for determining the horizontal acceleration. When the swing estimation unit determines that the horizontal acceleration is less than the second horizontal direction threshold when the operating mode is the controlled operating mode, the operating control unit returns the operating mode to the normal operating mode.

7. The elevator system according to any one of claims 1 to 6, wherein, The lifting mechanism comprises both the car and the counterweight. The sway estimation unit estimates the amount of sway of the object to be estimated based on the vertical and horizontal acceleration of the car and the vertical and horizontal acceleration of the counterweight, and determines whether the object to be estimated has produced abnormal sway.

8. The elevator system according to claim 1 or 2, wherein, The lifting mechanism comprises both the car and the counterweight. In the sway estimation unit, a first car vertical direction threshold is set as the determination criterion for the vertical acceleration of the car, a first car horizontal direction threshold is set as the determination criterion for the horizontal acceleration of the car, a first counterweight vertical direction threshold is set as the determination criterion for the vertical acceleration of the counterweight, and a first counterweight horizontal direction threshold is set as the determination criterion for the horizontal acceleration of the counterweight. When at least one of the following conditions is met: the vertical acceleration of the car is greater than or equal to the vertical threshold of the first car and the vertical acceleration of the counterweight is greater than or equal to the vertical threshold of the first counterweight, and the horizontal acceleration of the car is greater than or equal to the horizontal threshold of the first car and the horizontal acceleration of the counterweight is greater than or equal to the horizontal threshold of the first counterweight, the sway estimation unit determines that the estimated object has produced abnormal sway.

9. The elevator system according to claim 1 or 2, wherein, The main body of the elevator system has two or more of the aforementioned elevator devices. When estimating the swing amount of the corresponding estimated object, the swing estimation unit in each of the elevator devices also refers to the signal from the acceleration detector in the other elevator devices.

10. The elevator system according to claim 9, wherein, The lifting body in each of the aforementioned elevator devices consists of both the car and the counterweight. In the sway estimation unit of each of the aforementioned elevator devices, a first car vertical direction threshold is set as a criterion for determining the vertical acceleration of the car, a first car horizontal direction threshold is set as a criterion for determining the horizontal acceleration of the car, a first counterweight vertical direction threshold is set as a criterion for determining the vertical acceleration of the counterweight, and a first counterweight horizontal direction threshold is set as a criterion for determining the horizontal acceleration of the counterweight. When at least one of the following conditions is met: the vertical acceleration of the corresponding car is greater than or equal to the vertical threshold of the first car and the vertical acceleration of the corresponding counterweight is greater than or equal to the vertical threshold of the first counterweight, and the horizontal acceleration of two or more of the lifting bodies in all the elevator devices is greater than or equal to the corresponding threshold of the horizontal threshold of the first car and the horizontal threshold of the first counterweight, the sway estimation unit in each of the elevator devices determines that the corresponding estimated object has swayed abnormally.

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