JP7155342B1 - Elevator control device and elevator control method - Google Patents

Abstract

An elevator control device and an elevator control method capable of easily and accurately detecting a decrease in the traction ability of an elevator are provided. SOLUTION: According to an embodiment, an elevator control device outputs pulses generated by a motor pulse generator when a car travels from a predetermined position to a landing position on each floor with the traction capacity of a traction elevator normal. A pulse data set storage unit that stores the integrated value of the number of pulses as a pulse data set, a diagnostic operation execution unit that executes a diagnostic operation by running a predetermined section at a predetermined timing, and the pulses stored in the pulse data set storage unit If the difference between the integrated value of the number of pulses corresponding to the predetermined section obtained based on the data set and the integrated value of the number of pulses generated by the motor pulse generator and calculated during diagnostic operation is equal to or greater than a predetermined threshold. and a traction capacity diagnostic unit for diagnosing that the traction capacity is not normal. [Selection drawing] Fig. 1

Description

An embodiment of the present invention relates to an elevator control device and an elevator control method.

A typical traction-type elevator is constructed with a main rope stretched over a sheave of a hoist installed at the top of a hoistway, and a car and a counterweight hanging from both ends of the main rope. Frictional force generated between the sheave and the main rope drives the elevator to raise and lower the car and the counterweight.

JP 2013-23367 A

The drive capacity (traction capacity) of the traction elevator described above depends on the frictional force generated between the main rope and the sheave. As a result, when the sheave groove wears due to friction with the main rope due to long-term use of the elevator, the traction capacity of the elevator is reduced, causing the rope to slip and causing the car to shift its landing position. .

As a technology to solve this problem, the number of pulses generated by the motor pulse generator installed in the hoist motor when the car travels a predetermined section and the number of pulses generated by the governor installed in the governor (speed governor) There is a technique for detecting the amount of slippage between the main rope and the sheave based on the number of pulses generated by the pulse generator. However, in elevators without a governor pulse generator, this technology cannot be used to detect the amount of slippage between the main rope and the sheave, and there is a problem that the decrease in traction capacity cannot be detected.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an elevator control apparatus and an elevator control method capable of easily and accurately detecting deterioration of the traction ability of an elevator.

According to an embodiment for achieving the above object, the elevator control device generates a pulse pulse generated by the motor pulse generator when the car travels from a predetermined position to the landing position on each floor with the traction capacity of the traction elevator normal. A pulse data set storage unit that stores the integrated value of the number of pulses obtained as a pulse data set, a diagnostic operation execution unit that executes diagnostic operation by running a predetermined section at a predetermined timing, and stored in the pulse data set storage unit. The difference between the integrated value of the number of pulses corresponding to the predetermined interval obtained based on the pulse data set obtained from the above and the integrated value of the number of pulses generated by the motor pulse generator, which is calculated during the diagnostic operation, is a predetermined threshold value. A traction capacity diagnosis unit is provided for diagnosing that the traction capacity is not normal if the above is the case.

1 is an overall view showing the configuration of a remote monitoring system using an elevator control device according to one embodiment; FIG. 4 is an example of a pulse data set stored in a pulse data set storage of an elevator controller according to one embodiment; 4 is a flowchart illustrating operations performed when remote diagnostics are performed in an elevator controller according to one embodiment.

<Configuration of remote monitoring system using elevator control device according to one embodiment>
A configuration of a remote monitoring system using an elevator control device according to an embodiment of the present invention will be described with reference to FIG. A remote monitoring system 1 according to this embodiment is a system for monitoring the state of an elevator 10 installed in a building from a remote monitoring device 3 connected via a communication network 2 .

The elevator 10 includes a hoisting machine 12 installed in the upper part of the hoistway 11, a main rope 13 stretched over the hoisting machine 12, a car 14 suspended from one end of the main rope 13, and the main rope 13. It has a counterweight 15 suspended at the other end and an elevator controller 16 for controlling equipment within the elevator 10 . The hoist 12 has a sheave (sheave) 121 , a drive shaft 122 that rotates the sheave 121 , and a motor pulse generator 123 that generates a number of pulses corresponding to the amount of rotation of the drive shaft 122 .

The elevator control device 16 has an operation control section 161 , a pulse integrated value calculation section 162 , a pulse data set storage section 163 , a communication section 164 , a diagnostic operation execution section 165 and a traction capacity diagnosis section 166 .

The operation control unit 161 controls the operation of equipment inside the elevator 10 including the hoist 12 . The pulse integrated value calculator 162 calculates an integrated value of the number of pulses generated by the motor pulse generator 123 while the car 14 is running.

The pulse data set storage unit 163 is stored in the pulse data set storage unit 163 when the car 14 travels from a predetermined position to the landing position on each floor in a state in which the traction capacity of the elevator 10 is normal and in a no-load state in which the car 14 has no load. An integrated value of the number of pulses generated by the pulse generator 123 is stored as a pulse data set.

The communication unit 164 communicates with the remote monitoring device 3 via the communication network 2 . When the diagnosis operation execution unit 165 determines that the execution timing of the predetermined diagnosis operation has arrived based on the instruction from the remote monitoring device 3, the diagnosis operation is executed by running the car 14 in a no-load state for a predetermined section.

The traction ability diagnosis unit 166 acquires the integrated value of the number of pulses corresponding to the predetermined section from the pulse data set stored in the pulse data set storage unit 163, It is compared with the integrated value of the number of pulses calculated by the integrated value calculating section 162 . As a result of the comparison, if the difference is equal to or greater than a predetermined threshold, the traction performance diagnostic unit 166 diagnoses that rope slippage has occurred between the main rope 13 and the sheave 121 and that the traction performance is not normal.

<Operation of remote monitoring system according to one embodiment>
The operation of the remote monitoring system 1 according to this embodiment will be described. In this embodiment, the elevator 10 to be monitored runs on the 1st to 5th floors in the building. In the pulse data set storage unit 163 of the elevator control device 16, when the car 14 travels from a predetermined position to the floor landing position on each floor with the traction capacity of the elevator 10 normal and in the no-load state, the motor pulse generator 123 An integrated value of the number of generated pulses is stored as a pulse data set.

An example of the pulse data set stored in the pulse data set storage unit 163 is shown in FIG. In the pulse data set of FIG. 2, the integrated value of the number of pulses when the car 14 is stopped at the lowest floor, ie, the first floor, is set to "000000", and the car 14 is run in the upward direction from the first floor, The integrated value of the number of pulses when arriving at the landing position on the 2nd floor is "005000", the integrated value of the number of pulses when arriving at the landing position on the 3rd floor is "008000", and the landing position on the 4th floor. The integrated value of the number of pulses when the robot reached the landing position on the fifth floor is stored as "010500", and the integrated value of the number of pulses when it reaches the landing position on the fifth floor is stored as "013000".

In other words, the integrated value of the pulse number corresponding to the distance from the 1st floor to the 2nd floor is "005000", the integrated value of the pulse number corresponding to the distance from the 1st floor to the 3rd floor is "008000", and the 1st floor The integrated value of the number of pulses corresponding to the distance from the first floor to the fourth floor is "010500", and the integrated value of the number of pulses corresponding to the distance from the first floor to the fifth floor is "013000".

This pulse data set is recorded during post-installation electrical adjustments for proper speed control during normal operation. By managing the landing position of each floor with the pulse integrated value recorded in the pulse data set, the remaining distance from the current position to the landing position can be grasped from the difference in the pulse integrated value, and the timing of the deceleration start position can be determined. control becomes possible.

The process of diagnosing the traction ability of the elevator 10 by using the pulse data set, which is performed for position recognition of speed control in this way, will be described with reference to the flowchart of FIG. The diagnostic operation execution unit 165 in the elevator control device 16 receives information indicating the execution timing of the diagnostic operation, which is transmitted from the remote monitoring device 3, for example, to start the diagnostic operation at 0:00 on the first day of every month. It holds the pointing information.

When the diagnostic operation execution unit 165 detects that the execution timing of the diagnostic operation has arrived based on the held information ("YES" in S1), it sends an instruction to start executing a predetermined diagnostic operation to the operation control unit 161. do. When the operation control unit 161 acquires the instruction, as diagnostic operation, the car 14 is caused to travel from the preset first floor to the fifth floor in a no-load state (S2).

When the operation control unit 161 performs a diagnostic operation in which the car 14 travels from the 1st floor to the 5th floor, the traction ability diagnosis unit 166 calculates the integrated value of the number of pulses calculated by the pulse integrated value calculation unit 162 during the diagnostic operation. (S3).

Next, based on the pulse data set stored in the pulse data set storage unit 163, the traction performance diagnosis unit 166 detects the pulse corresponding to the section from the 1st floor to the 5th floor where the car 14 travels by diagnostic operation. Get the integrated value of the number "013000". Then, the traction performance diagnosis unit 166 compares the pulse number integrated value “013000” acquired from the pulse data set with the pulse number integrated value calculated by the pulse integrated value calculation unit 162 during the diagnostic operation.

As a result of the comparison, if the difference is equal to or greater than the predetermined threshold value ("YES" in S4), the traction capacity diagnostic unit 166 determines that the traction capacity of the elevator 10 is not normal, that is, there is rope slippage between the main rope and the sheave. Diagnose that it occurs and the traction ability is reduced to an abnormal state.

When the traction performance diagnosis unit 166 diagnoses that the traction performance is not normal, it outputs an abnormality detection notification regarding the traction performance of the elevator 10 to the remote monitoring device 3 via the communication unit 164 and the communication network 2 (S5). In step S4, when the difference between the integrated value of the number of pulses acquired from the pulse data set and the integrated value of the number of pulses calculated by the pulse integrated value calculating unit 162 during diagnostic operation is less than a predetermined value (" NO"), the traction capacity diagnosis unit 166 diagnoses that the traction capacity is within the normal range, and does not output an abnormality detection notification.

According to the above-described embodiment, by using the pulse data set used for adjusting the landing position of the car 14 in normal operation, it is possible to easily and accurately remotely detect the deterioration of the traction ability of the elevator 10. , the failure risk can be grasped in advance.

In the above-described embodiment, rope slippage due to reduced traction occurs when the car 14 accelerates or decelerates. It may be limited to a section (acceleration/deceleration section).

In this case, based on the pulse data set stored in the pulse data set storage unit 163, the traction performance diagnosis unit 166 determines the acceleration/deceleration interval in which the car 14 accelerates or decelerates during diagnostic operation, An integrated value of the number of pulses corresponding to the interval between floors and the interval between the fourth floor and the fifth floor where deceleration is performed is obtained. The integrated value of the number of pulses corresponding to the section from the 1st floor to the 2nd floor where the acceleration is performed is, for example, the integrated value of the pulse number corresponding to the 1st floor in FIG. ” is the difference “005000”. Also, the integrated value of the number of pulses corresponding to the section from the 4th floor to the 5th floor where the deceleration is performed is, for example, the integrated value of the pulse number corresponding to the 4th floor in FIG. This is the difference "002500" from "013000".

Then, the traction capacity diagnosis unit 166 calculates the integrated value of the number of pulses acquired from the pulse data set and the pulse calculated by the pulse integrated value calculation unit 162 when the car 14 travels in the acceleration/deceleration section during diagnostic operation. If the difference from the integrated value of the number is equal to or greater than a predetermined threshold, it is diagnosed that rope slip has occurred between the main rope 13 and the sheave 121 and the traction ability is not normal.

Specifically, the integrated value "005000" of the number of pulses corresponding to the section from the first floor to the second floor obtained from the pulse data set, and the time when the car 14 traveled in the section from the first floor to the second floor If the difference from the integrated value of the number of pulses calculated in 1 is equal to or greater than a predetermined threshold value, the traction performance diagnosis unit 166 diagnoses that the traction performance is not normal. In addition, the integrated value "002500" of the number of pulses corresponding to the section from the 4th floor to the 5th floor obtained from the pulse data set, and the value calculated when the car 14 traveled in the section from the 4th floor to the 5th floor during the diagnostic operation. If the difference from the integrated value of the number of pulses obtained is a predetermined threshold value, the traction performance diagnosis section 166 diagnoses that the traction performance is not normal. Alternatively, if the difference between the integrated value of the number of pulses obtained from the pulse data set and the integrated value of the number of pulses calculated during diagnostic operation is greater than or equal to a predetermined threshold in both the acceleration section and the deceleration section, the traction The ability diagnosis unit 166 diagnoses that the traction ability is not normal.

By performing diagnostic processing in this way, it is possible to detect deterioration in traction performance with even higher accuracy. At that time, by intentionally making the acceleration/deceleration higher than during normal operation, if rope slippage occurs, the degree of slippage increases, making it possible to detect a decline in traction capacity even earlier. .

Further, in the above-described embodiment, a plurality of thresholds are set in the traction performance diagnostic unit 166 to compare the difference between the integrated value of the number of pulses acquired from the pulse data set and the integrated value of the number of pulses calculated during the diagnostic operation. , traction ability abnormality may be detected in stages. For example, as in the above-described embodiment, the threshold for determining normality/abnormality of the traction ability is set as the first threshold, and a second threshold lower than the first threshold is also set. It is possible to detect a state in which there is a tendency and a decrease in traction ability is expected.

Here, when detecting that the calculated difference is equal to or greater than the second threshold value and less than the first threshold value, the traction performance diagnosis unit 166 refers to the determination result of the traction performance at the time of the previous diagnostic operation. can be For example, if there is a similar difference during the previous diagnostic drive, it can be determined that the traction ability has not deteriorated.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and its equivalents.

REFERENCE SIGNS LIST 1 remote monitoring system 2 communication network 3 remote monitoring device 10 elevator 11 hoistway 12 hoist 13 main rope 14 car 15 counterweight 16 elevator control Apparatus 121 Sheave 122 Drive shaft 123 Motor pulse generator 161 Operation control unit 162 Pulse integrated value calculation unit 163 Pulse data set storage unit 164 Communication unit 165 Diagnosis operation execution unit , 166 Traction capability diagnostic unit

Claims (6)

An elevator having a main rope stretched over a sheave of a hoist, a car and a counterweight suspended from both ends of the rope, and a motor pulse generator that generates a number of pulses according to the rotation amount of the drive shaft of the sheave. to control the
Pulse data for storing, as a pulse data set, an integrated value of the number of pulses generated by the motor pulse generator when the elevator car travels from a predetermined position to a landing position on each floor while the traction capacity of the elevator is normal. a set storage unit;
a diagnostic operation execution unit that causes the car to travel a predetermined section when a predetermined diagnostic operation execution timing arrives, thereby executing the diagnostic operation;
a pulse integrated value calculation unit that calculates an integrated value of the number of pulses generated by the motor pulse generator while the car is running;
An integrated value of the number of pulses corresponding to the predetermined interval is acquired based on the pulse data set stored in the pulse data set storage unit, and the acquired integrated value of the number of pulses is calculated during the diagnostic operation. An elevator control apparatus, comprising: a traction capacity diagnosis section for diagnosing that the traction capacity is not normal if a difference from the integrated value of the number of pulses calculated by the section is equal to or greater than a predetermined threshold. The value in the pulse data set stored in the pulse data set storage unit is an integrated value of the number of pulses generated when the car travels from a predetermined position to the landing position on each floor with no load. can be,
2. The elevator control apparatus according to claim 1, wherein the diagnostic operation executing section executes the diagnostic operation when the car has no load. The traction performance diagnostic unit obtains an integrated value of the number of pulses corresponding to an acceleration/deceleration section in which the car accelerates or decelerates during the diagnostic operation, based on the pulse data set stored in the pulse data set storage unit. The difference between the obtained integrated value of the number of pulses and the integrated value of the number of pulses calculated by the integrated pulse number calculating section when the car travels in the acceleration/deceleration section during the diagnostic operation is a predetermined value. 3. The elevator control apparatus according to claim 1, wherein if the traction capacity is equal to or greater than the threshold value, it is diagnosed that the traction capacity is not normal. connected to a remote monitoring device for remotely monitoring the state of the elevator;
The pulse integrated value calculation unit determines whether or not the execution timing of the diagnostic operation has arrived based on an instruction from the remote monitoring device,
The elevator control apparatus according to any one of claims 1 to 3, wherein the traction ability diagnosis unit transmits the result information of the diagnosis to the remote monitoring apparatus. The diagnostic operation is performed at predetermined intervals,
The traction ability diagnosis unit sets a first threshold that is the threshold and a second threshold that is lower than the first threshold, and the difference is equal to or greater than the second threshold and the first threshold Any one of claims 1 to 4, characterized in that when it is detected that it is less than the above, it is determined whether or not a decrease in traction ability is predicted based on the diagnosis result at the time of the previous diagnostic operation. 2. The elevator control device according to item 1. An elevator having a main rope stretched over a sheave of a hoist, a car and a counterweight suspended from both ends of the rope, and a motor pulse generator that generates a number of pulses according to the rotation amount of the drive shaft of the sheave. to control the
Pulse data for storing, as a pulse data set, an integrated value of the number of pulses generated by the motor pulse generator when the elevator car travels from a predetermined position to a landing position on each floor while the traction capacity of the elevator is normal. a set storage unit;
a pulse integrated value calculation unit that calculates an integrated value of the number of pulses generated by the motor pulse generator while the car is running;
an elevator controller comprising
When a predetermined diagnostic operation execution timing arrives, the diagnostic operation is performed by running the car for a predetermined section,
An integrated value of the number of pulses corresponding to the predetermined interval is acquired based on the pulse data set stored in the pulse data set storage unit, and the acquired integrated value of the number of pulses is calculated during the diagnostic operation. An elevator control method, comprising: diagnosing that traction capacity is not normal if a difference from the integrated value of the number of pulses calculated by the section is equal to or greater than a predetermined threshold.

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