JP6812506B2 - Elevator monitoring method and elevator monitoring device - Google Patents

Description

Embodiments of the present invention relate to an elevator monitoring method and an elevator monitoring device.

Conventionally, the operating environment of an elevator has changed due to deterioration over time due to continuous use, tilting, expansion and contraction of the building in which the elevator is installed. As the change in the operating environment, for example, a change in the contact state of the roller guide and the rail in the car of the elevator, a change in the width of the left and right rails, and a contact state with the main sheave and the compensate can be considered.

When these changes in the driving environment occur, the running loss becomes large. If the running loss becomes too large, the possibility of equipment failure increases.

It is difficult to detect the driving loss when the above-mentioned change in the driving environment occurs by remote monitoring using a camera. For this reason, the elevator is checked visually by the maintenance staff. However, in this check method, there is a demand for remote monitoring because the maintenance staff needs to go to the place where the elevator is installed.

By the way, when the elevator stops due to the occurrence of an earthquake or the like, it is determined whether or not the torque during steady driving is equal to or higher than a predetermined threshold during diagnostic driving, and if it is determined to be abnormal, the car is forcibly stopped. Technology has been proposed.

For example, Patent Document 1 describes a technique for accurately detecting an abnormality in the torque of a motor when the elevator stops due to an earthquake or the like, ensuring driving safety, and then automatically recovering the elevator. According to this technology, maintenance personnel can perform automatic restoration without going to the place where the elevator is installed.

Further, Cited Document 2 proposes a technique of using a torque command value during steady running in order to detect brake drag.

Japanese Unexamined Patent Publication No. 2008-156078 Patent No. 6157924

As described above, in the prior art, there have been proposed a technique for detecting a failure according to whether or not the torque is equal to or higher than a predetermined threshold value when the elevator is stopped due to an earthquake or the like, and a technique for detecting brake drag. .. However, for example, the torque is applied to the running loss that occurs when the environment changes, such as the contact status of the roller guides and rails in the elevator car, the width of the left and right rails, and the contact status with the main sheave and compensive. No technique has been proposed for detection using. If the running loss can be detected by torque, remote monitoring is possible. Therefore, there is an increasing demand for detecting running loss based on torque.

The elevator monitoring method of the embodiment is an elevator monitoring method executed by the elevator monitoring device, and the elevator monitoring device stores the first torque information for compensating for the imbalance of the elevator car when the elevator starts traveling. A reception control step for receiving a second torque information indicating the torque in the drive source for driving the elevator when the elevator is running steadily after a predetermined time, and a second step for starting the steady running. when a plurality of second torque information received, the average value of the torque difference between the first torque information, is not smaller than a predetermined threshold value between the first time and the second time to complete the steady running, Includes a transmission control step to transmit that it is in an abnormal state.

FIG. 1 is a schematic view showing an example of the overall configuration of the elevator control system according to the embodiment. FIG. 2 is a block diagram showing a software configuration of the control panel and the remote monitoring device of the embodiment. FIG. 3 is a diagram showing a speed change when the operation control unit of the embodiment moves the car according to the diagnostic operation command. FIG. 4 is a diagram showing a torque command value output when the operation control unit of the embodiment controls the motor when the running loss is small. FIG. 5 is a diagram showing a torque command value output when the operation control unit of the embodiment controls the motor when the running loss is large. FIG. 6 is a flowchart showing an overall processing procedure in the remote monitoring device of the embodiment.

The elevator monitoring method and the elevator monitoring device according to the embodiment will be described in detail below with reference to the drawings. The components in this embodiment include those that can be replaced by those skilled in the art and are easily or substantially the same, and the present invention is not limited to the following embodiments.

FIG. 1 is a schematic view showing an example of the overall configuration of the elevator control system according to the embodiment. As shown in FIG. 1, the elevator control system 1 includes a hoistway 2, a car 3, a counterweight 4, a main rope 5, a sheave 6, a hoist 7, a motor 8, and a control panel. 10 and. In the elevator control system 1, the drive of each part is controlled by the control panel 10, and the car 3 moves up and down in the hoistway 2 to move to a hall of an arbitrary destination floor.

In the present embodiment, an example applied to an elevator will be described as an example of an elevator, but the elevator is not limited to the elevator.

The elevator control system 1 is configured as a so-called slip-type elevator in which a car 3 and a counterweight 4 are connected by a main rope 5. The hoistway 2 is provided along the vertical direction of the building in which the elevator control system 1 is provided, and is provided over a plurality of floors in the building so that the vertical direction is the vertical direction. Further, a hoisting machine 7 (including a motor 8, a sheave 6 and the like) for moving the car 3 up and down is provided on the upper side of the hoistway 2 in the elevating direction. Further, the hoistway 2 is provided with guide rails (not shown) extending in the elevating direction, which serve as guides when the car 3 and the counterweight 4 move up and down.

The car 3 has a box shape, for example, on which users and luggage can be placed. The counterweight 4 is a balancing weight connected to the car 3 via the main rope 5, and moves up and down in conjunction with the car 3 in the hoistway 2. The counter weight 4 moves up and down along a weight guide rail (not shown). When the car 3 has a predetermined load capacity (for example, about 1/2 of the maximum load capacity), the weight of the counterweight 4 is set so as to be balanced with the car 3 with the hoisting machine 7 sandwiched between them. ing.

The hoisting machine 7 has, for example, a motor (an example of a drive source) 8 and a sheave 6 connected to the motor 8, and winds the main rope 5 with the power generated by the motor 8. The hoisting machine 7 can be driven and controlled by the control panel 10.

The control panel 10 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory) that stores a predetermined control program or the like in advance, a RAM (Random Access Memory) that temporarily stores the calculation result of the CPU, and the like. The control panel 10 is electrically connected to various sensors, detectors, and each part of the elevator control system 1, and controls the operation of each part in an integrated manner.

FIG. 2 is a block diagram showing a software configuration of the control panel and the remote monitoring device of the present embodiment. As shown in FIG. 2, in the control panel 10 and the remote monitoring device 200, the CPU executes a control program stored in the ROM. The control panel 10 realizes the communication control unit 101 and the operation control unit 102. The remote monitoring device 200 realizes the first communication control unit 201, the determination unit 203, and the second communication control unit 204. Further, the torque information storage unit 202 of the remote monitoring device 200 is stored in a read / write ROM or the like.

The control panel 10 will be described. The communication control unit 101 transmits the torque command value for the operation control unit 102 to control the motor 8, the logic signal described later, and the information acquired from various sensors to the remote monitoring device 200.

The operation control unit 102 controls the motor 8 based on the torque command value so as to move the car 3 to the target floor according to the landing call registration from the landing operation panel and the car call registration from the in-car operation panel. ..

FIG. 3 is a diagram showing a speed change when the operation control unit 102 of the present embodiment moves the car according to the diagnostic operation command. It is assumed that the diagnostic operation command is transmitted from the remote monitoring device 200 to the control panel 10. The speed change is based on a logic signal indicating a control timing for controlling the motor 8 when the driving control unit 102 controls the car 3 for traveling based on the diagnostic driving command.

The operation control unit 102 is traveling at a predetermined speed by causing the elevator car 3 to travel between the top floor and the bottom floor (in other words, to travel the longest distance) in accordance with the diagnostic operation command. Allow more than a certain amount of time. The operation control unit 102 of the present embodiment performs the traveling control once. The example shown in FIG. 3 shows the speed change of the outward route or the return route.

As shown in FIG. 3, the speed of the car 3 increases from the start of movement to the time t1. After that, the period from time t1 to time t2 is a period during which the vehicle travels at a predetermined speed and the speed does not change, and is referred to as steady traveling in the present embodiment.

In the present embodiment, the torque output by the motor 8 in order to make the car 3 run steadily and to compensate for the imbalance between the car 3 and the counterweight 4 is also referred to as a suspension torque.

Returning to FIG. 2, the remote monitoring device 200 will be described.

The first communication control unit 201 periodically transmits a diagnostic operation command to the control panel 10 via the public network 210.

After transmitting the diagnostic operation command, the first communication control unit 201 receives a torque command value for the operation control unit 102 to control the motor 8 and information from various sensors from the control panel 10. Further, the first communication control unit 201 receives a logic signal indicating the control timing for controlling the motor 8 when the operation control unit 102 controls the driving of the car 3 based on the diagnostic operation command. ..

The torque information storage unit 202 shows a torque command value of the suspension torque for compensating for the imbalance of the elevator car 3 at the start of traveling in the elevator control system 1 (first torque information). Remember. It is assumed that the torque value at the start is received from the control panel 10 at the start of traveling.

The first communication control unit 201 is a torque indicating the suspension torque in the motor 8 when the elevator car 3 is in steady running based on the diagnostic operation command after the start of running in the elevator control system 1. Receive the command value (second torque information).

The determination unit 203 calculates the torque difference between the torque command value for the motor 8 received by the first communication control unit 201 and the start torque value stored in the torque information storage unit 202. The torque difference is calculated as an absolute value.

The determination unit 203 of the present embodiment calculates the average value of the torque difference from the start torque value based on the plurality of torque command values received by the first communication control unit 201 during steady running. In other words, the average value of the torque difference is a value indicating a running loss. Therefore, the determination unit 203 determines whether or not the average value of the torque differences is equal to or greater than a predetermined threshold value.

FIG. 4 is a diagram showing a torque command value output when the operation control unit 102 of the present embodiment controls the motor 8 when the running loss is small. In the example shown in FIG. 4, torque for increasing the speed until steady running is output in the time zone up to time t1.

Then, during steady running (time t1 to time t2), the first communication control unit 201 receives the torque command value To_1. Then, when the determination unit 203 determines, the average value of the torque difference between the torque command value To_1 received by the first communication control unit 201 and the start torque value (first torque information) torque command value To_0 is , The value is smaller than the predetermined threshold value. Since the average value of the torque difference is smaller than the predetermined threshold value, the determination unit 203 determines that it is in the normal state.

FIG. 5 is a diagram showing a torque command value output when the operation control unit 102 of the present embodiment controls the motor 8 when the running loss is large. In the example shown in FIG. 5, torque for increasing the speed to steady running is output in the time zone up to time t1.

Then, during steady running (time t1 to time t2), the first communication control unit 201 receives the torque command value To_2. The average of the torque difference between the torque command value To_2 received by the first communication control unit 201 and the torque command value To_0 at the start (first torque information) during steady running (time t1 to time t2). The value becomes a value larger than a predetermined threshold value. Since the average value of the torque differences is equal to or greater than a predetermined threshold value, the determination unit 203 determines that the state is abnormal.

In this embodiment, an example of calculating the average value of the torque difference based on a plurality of torque command values received during steady running will be described, but the average value of the torque difference based on the plurality of torque command values will be used. The determination is not particularly limited, and the determination may be made using the torque difference based on the torque command value received only once during steady running.

The predetermined threshold value may be a reference for determining the torque difference, and for example, it is conceivable to set a value exceeding 20% of the rated torque of the motor 8. This is because, in general, when the motor 8 is gearless, the system efficiency is 80 to 90%.

The second communication control unit 204 transmits / receives information to / from the remote monitoring device 250. For example, the second communication control unit 204 remotely monitors the notification of the abnormal state when the determination unit 203 determines that the average value of the torque difference is equal to or greater than a predetermined threshold value and therefore is in an abnormal state. Transmit to device 250.

The remote monitoring device 250 is a device in which the administrator monitors the abnormal state of the elevator. When the remote monitoring device 250 receives a notification indicating that it is in an abnormal state, the remote monitoring device 250 displays the notification content to the administrator. As a result, the state of the elevator control system 1 can be grasped.

In the present embodiment, the second communication control unit 204 transmits a notification to the remote monitoring device 250 that the driving loss is in an abnormal state due to an increase, but the operation control unit 102 is a car. The drive by the motor 8 of No. 3 is continued, and the operation control is not stopped.

According to the notification, when the maintenance staff is dispatched to the elevator control system 1, the roller guides and rails are adjusted. As a result, running loss can be reduced. The timing at which the maintenance personnel are dispatched to the elevator control system 1 shall be determined according to the mode of implementation, and may be dispatched at regular maintenance inspections or earlier than at the time of maintenance inspections.

FIG. 6 is a flowchart showing an overall processing procedure in the remote monitoring device 200 of the present embodiment.

First, the first communication control unit 201 transmits a diagnostic operation command to the control panel 10 (S601). As a result, the operation control unit 102 of the control panel 10 performs operation control to move the car 3 back and forth between the top floor and the bottom floor.

Next, the first communication control unit 201 receives a plurality of torque command values and logic signals of the motor 8 during steady running from the control panel 10 (S602).

Then, the determination unit 203 calculates the average value of the torque difference between the plurality of torque command values received by the first communication control unit 201 and the torque value at the start during steady running (S603).

Then, the determination unit 203 determines whether or not the average value of the torque differences is equal to or greater than a predetermined threshold value (S604). When it is determined that the average value of the torque difference is smaller than a predetermined threshold value (S604: No), the process ends without any particular processing.

On the other hand, when the determination unit 203 determines that the average value of the torque difference is equal to or greater than a predetermined threshold value (S604: Yes), the remote monitoring device 250 notifies that the second communication control unit 204 is in an abnormal state. Is transmitted to (S605).

By the above-mentioned processing procedure, it is possible to grasp the traveling loss caused by the elevator control system 1 even at a place away from the elevator including the car 3 and the like such as the remote monitoring device 200.

In the remote monitoring device 200 of the present embodiment, when it is determined that the average value of the torque difference is equal to or higher than a predetermined threshold value, a notification indicating an abnormal state is transmitted to the remote monitoring device 250, but the control panel No notification is given to 10 for stopping the drive control of the car 3, and the drive control of the car 3 is continued. This is because there is a risk of failure due to an increase in running loss, but a failure of the car 3 or the like has not occurred.

Further, the remote monitoring device 200 may be provided with a plurality of predetermined threshold values for determining whether or not the traveling loss is increasing. For example, when the determination unit 203 determines that the threshold value is equal to or higher than the first threshold value, the remote monitoring device 250 is notified to urge the maintenance personnel to inspect the running loss during the periodic inspection, and the determination unit 203 second When it is determined that the threshold value is equal to or higher than the threshold value (second threshold value> first threshold value), it is conceivable to notify the remote monitoring device 250 to urge the maintenance staff to inspect the running loss earlier than the periodic inspection. ..

Further, the control panel 10 of the present embodiment may perform control so as to shorten the interval for performing the above diagnosis when the determination unit 203 determines that the threshold value is equal to or higher than the first threshold value.

For example, from the start of traveling, the first communication control unit 201 of the remote monitoring device 200 transmits a diagnostic operation command to the control panel 10 at first predetermined intervals. Then, when the determination unit 203 determines that the average value of the torque difference is equal to or greater than the first threshold value, the first communication control unit 201 sends a diagnostic operation command at every second predetermined interval, which is shorter than the first predetermined interval. To send.

In other words, in the present embodiment, when the torque difference is equal to or greater than the first threshold value, the cycle for performing the determination based on the torque difference is shorter than the cycle before the torque difference is determined to be equal to or greater than the first threshold value. To do. As a result, the running loss can be grasped, so that the failure risk can be easily grasped.

In the present embodiment, an example of determining based on the torque difference between the torque command value during steady running at the start of running and the torque command value during steady running after the start of running has been described. However, this embodiment is not limited to the method of determining by the torque command value, and may be determined by the torque value detected by the torque sensor.

(Modification example 1)
According to the elevator control system 1 of the above-described embodiment, an example of storing the start torque value indicating the torque at the start of running has been described as an example of a predetermined time, but the method of storing the torque at the start of running is used. The predetermined time is not limited, and may be, for example, at the time of installation adjustment or at the time of the previous diagnostic operation (at the time of determining whether or not the previous torque difference is equal to or higher than a predetermined threshold value). In such a case, the torque information storage unit 202 stores the torque command value at the time of installation adjustment and the torque command value at the time of the previous diagnosis operation. Then, the determination unit 203 calculates the torque difference between the torque command value received by the first communication control unit 201 and the torque command value at the time of installation adjustment or the torque command value at the time of the previous diagnosis operation. Subsequent processing is the same as that of the first embodiment.

(Modification 2)
The second modification will explain an example in which a predetermined threshold value for determining the torque difference is changed according to the traveling direction of the car 3.

In this modification, when the car 3 is lowered, the determination unit 203 determines the torque between the plurality of torque values acquired by the first communication control unit 201 and the starting torque value during steady running due to the lowering. When it is determined that the average value of the differences is equal to or greater than the lowering threshold value, the second communication control unit 204 transmits a notification to the remote monitoring device 250 that the abnormal state is present.

On the other hand, when the car 3 is raised, the determination unit 203 averages the torque difference between the plurality of torque values acquired by the first communication control unit 201 and the starting torque value during steady driving due to the rise. When the value is determined to be equal to or higher than the rising threshold value, the second communication control unit 204 transmits a notification to the remote monitoring device 250 that the abnormal state is present.

In this modification, by providing the descending threshold value and the ascending threshold value, it is possible to make a determination more suitable for the traveling direction of the car 3. As a result, the accuracy of detecting running loss is improved, so that the risk of failure can be further reduced.

(Modification 3)
In the elevator control system 1, a compen rope (not shown) may be provided between the car 3 and the counterweight 4. In such a case, a torque based on the imbalance based on the weight difference between the main rope 5 and the compensating rope is generated. Therefore, in the modification example 3, the case where the torque is taken into consideration will be described.

In this modification, in addition to the torque command value, the first communication control unit 201 has a compen compensation amount torque command value (compensation amount torque) for compensating for an imbalance caused by the weight difference between the main rope 5 and the compen rope. Information) is received from the control panel 10. Therefore, the control panel 10 acquires the compensating amount torque command value in advance. As the method for acquiring the compensating amount torque command value, any method may be used regardless of a well-known method.

Then, the determination unit 203 sets a value obtained by subtracting the compensating amount torque command value from the torque command value received by the first communication control unit 201 as the suspension torque command value, and sets a plurality of suspension torque command values and starts. Calculate the average value of the torque difference between the hour torque value and. Then, the determination unit 203 determines whether or not the average value of the torque differences is equal to or greater than a predetermined threshold value.

In this modified example, by performing the above-mentioned calculation, it is possible to further improve the accuracy of determining whether or not a running loss has occurred when the compensator is provided.

(Modification example 4)
In the modified example 4, a running loss corresponding to the position of the car 3 is detected during steady running.

When the determination unit 203 of this modification determines that the average value of the torque difference is equal to or greater than a predetermined threshold value, the first communication control unit 201 acquires the position information of the car 3 on the hoistway 2. Then, the second communication control unit 204 transmits a notification that the abnormal state is in the remote monitoring device 250 together with the position information of the car 3.

As a result, the remote monitoring device 250 can recognize the traveling loss at the position of the car 3. For example, it is possible to realize an abnormality determination based on the position of a specific car 3 such as the lowest floor, the middle floor, and the top floor.

According to the elevator control system 1 including the control panel 10 of the present embodiment and the modified example, as an example of a predetermined time, an example of storing a start torque value indicating a torque at the start of running has been described. The method is not limited to the method of storing the torque of the above, and may be a predetermined time, for example, at the time of delivery or at the time of maintenance and inspection to reduce running loss.

According to the elevator control system 1 including the control panel 10 of the present embodiment and the modified example, the operating environment is changed due to aged deterioration due to continuous use and inclination and expansion / contraction of the building in which the elevator is provided. As changes in the operating environment, for example, the elevator is constantly running due to an increase in running loss caused by changes in the contact status of the roller guides and rails in the elevator car, the left and right rail widths, and the contact status with the sheaves. It can be detected based on the torque at the time of being.

According to the elevator control system 1 including the control panel 10 of the present embodiment and the modified example, a comparison based on the torque difference between the torque of the motor 8 at a predetermined time such as at the start of running and the torque of the current motor 8 Therefore, it is determined how much running loss has occurred compared to the predetermined time. That is, this embodiment is different from the failure determination performed at the time of automatic earthquake recovery, such as whether or not the torque exceeds the limiter. That is, according to the elevator control system 1 including the control panel 10 of the present embodiment and the modified example, it is possible to grasp in advance whether or not a failure risk has occurred by determining whether or not a running loss has occurred. There is a difference.

Although the embodiments of the present invention have been described above, the embodiments are presented as examples and are not intended to limit the scope of the invention. The embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Elevator control system, 2 ... Hoistway, 3 ... Car, 4 ... Counterweight, 5 ... Main rope, 6 ... Sheave, 7 ... Hoisting machine, 8 ... Motor, 10 ... Control panel, 101 ... Communication control unit , 102 ... Operation control unit, 200 ... Remote monitoring device, 201 ... First communication control unit, 202 ... Torque information storage unit, 203 ... Judgment unit, 204 ... Second communication control unit, 210 ... Public network, 250 ... Remote monitoring device.

Claims (6)

This is an elevator monitoring method executed by an elevator monitoring device.
The elevator monitoring device includes a storage unit that stores first torque information indicating a torque for compensating for the imbalance of the car of the elevator when the elevator starts traveling.
A reception control step for receiving a second torque information indicating the torque in the drive source for driving the elevator when the elevator is in steady running.
A plurality of said second torque information received with the second time that ends the first time and steady running that started the steady running, said first torque information, the average value of the torque difference A transmission control step for transmitting to the effect that an abnormal state occurs when the threshold value is equal to or higher than a predetermined threshold.
Elevator monitoring methods including. The predetermined threshold value is made different depending on the direction in which the elevator is constantly traveling.
The elevator monitoring method according to claim 1. The reception control step shows the compensating amount torque for compensating for the imbalance caused by the weight difference between the main rope of the elevator and the compen rope provided between the elevator car and the counterweight. Compensation amount torque information is further received,
In the transmission control step, when the average value of the torque differences between the value obtained by subtracting the compensation amount torque information from each of the plurality of second torque information and the first torque information is equal to or more than a predetermined threshold value. , Send to the effect that it is in an abnormal state,
The elevator monitoring method according to claim 1 or 2. The reception control step further receives the position information of the elevator and receives the position information of the elevator.
The transmission control step indicates that it is in an abnormal state when the average value of the torque differences between the plurality of second torque information and the first torque information is equal to or more than a predetermined threshold value, and when the abnormal state occurs. Send the location information of
The elevator monitoring method according to any one of claims 1 to 3. When the torque difference between the second torque information and the first torque information is equal to or greater than a predetermined threshold value, it is based on the average value of the torque differences between the plurality of the second torque information and the first torque information. The cycle for making the determination is shorter than the cycle before the average value of the torque difference between the second torque information and the first torque information is determined to be equal to or higher than a predetermined threshold value .
The elevator monitoring method according to any one of claims 1 to 4. A storage unit that stores first torque information indicating the torque for compensating for the imbalance of the car of the elevator when the elevator starts traveling.
Definitive when the elevator after Tokoro scheduled is running steadily, a reception control unit for receiving the second torque information indicating a torque of the driving source for driving the elevator,
A plurality of said second torque information received with the second time that ends the first time and steady running that started the steady running, said first torque information, the average value of the torque difference A transmission control unit that transmits an abnormal state when the threshold value is equal to or higher than a predetermined threshold.
Elevator monitoring device equipped with.

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