JP2020029314A - Elevator diagnosis system and elevator diagnosis method - Google Patents

Abstract

To install a geomagnetic sensor, an acceleration sensor, and a monitor device in an elevator, and to provide speed control diagnosis for diagnosing whether the elevator speed of reaching a terminal floor is within a normal range on the basis of output information from both the sensors.SOLUTION: The elevator diagnosis system installed in an elevator including a hoist, a main rope wound up by the hoist, and a car connected to the main rope comprises: a sensor device that is attached to the car to detect a magnetic value and acceleration; and a monitor device that notifies an external control center of an abnormality when the car speed of passing the preceding floor of a terminal floor calculated on the basis of an output from the sensor device exceeds a threshold value.SELECTED DRAWING: Figure 3

Description

  The present invention evaluates the possibility of a collision accident before an abnormality occurs in the deceleration control of the elevator car and before an accident colliding with a shock absorber installed on the ceiling or bottom of the hoistway occurs, and The present invention relates to an elevator diagnosis system for notifying an accident to a control center when there is a possibility of an accident, and an elevator diagnosis method.

  When the elevator car moves to the top floor or the lowest floor, if an abnormality occurs in the deceleration control, the car may crash into the top or bottom of the hoistway.

  Therefore, in Patent Literature 1, for example, when the inspection mode is set by the mode changeover switch 26 in the solution section of the abstract, the control unit 24 provided in the terminal floor forced reduction gear transmission 23 sets the car 13 to the rated speed. Inspection operation is performed at a constant speed as follows: By this inspection operation, the speed data when the car 13 passes through the limit switches 12a, 12b, and 12c, respectively, and the restriction for the inspection operation preset in the second memory unit 29. By stopping the car 13 by comparing the speed data with the speed data, it is determined whether the terminal floor forced deceleration device 23 is operating normally. " A simple and safe inspection method of a device related to speed control at the terminal floor (terminal floor forced deceleration device) has been proposed.

JP 2009-215046 A

  However, the realization of the technique of Patent Document 1 requires an operation signal from a control device (microcomputer) of the elevator. Therefore, even in the case of a relay type elevator that cannot acquire an operation signal, and even in the case of a microcomputer type elevator, it is significant. When an elevator or the like made by another company that cannot receive an operation signal is to be diagnosed, it was impossible to check whether sufficient deceleration was performed when traveling to the terminal floor.

  In order to solve the above problems, an elevator diagnostic system according to the present invention is installed in an elevator having a hoist, a main rope wound by the hoist, and a car connected to the main rope. A sensor device attached to the car for detecting a magnetic value and an acceleration, and a sensor device for calculating the magnetic value and the acceleration based on an output of the sensor device when the car passes the first floor before the terminal floor. And a monitoring device for notifying an external control center of an abnormality when the speed exceeds a threshold value.

  According to the present invention, even when a signal from the control device of the elevator cannot be used, abnormality such as deterioration of the brake can be diagnosed at an early stage, so that an accident in which the car collides with the ceiling or the shock absorber occurs. In addition, maintenance work can be instructed to maintenance personnel via the control center, so that occurrence of a collision accident can be prevented.

The schematic diagram near the top floor of the elevator which installed the diagnostic system of one example. The schematic diagram near the lowest floor of the elevator which installed the diagnostic system of one example. FIG. 1 is a functional block diagram of a diagnostic system according to one embodiment. 9 is a flowchart illustrating a diagnosis process in the diagnosis system according to the embodiment. A graph of the vertical speed and acceleration observed until the car moves to the terminal floor.

  Hereinafter, an elevator diagnostic system 10 according to an embodiment of the present invention will be described with reference to the drawings.

  1A and 1B are schematic diagrams of an elevator in which the elevator diagnosis system 10 is installed. FIG. 1A shows the vicinity of the top floor, and FIG. 1B shows the vicinity of the bottom floor. In both figures, 1 is a hoist, 2 is a main rope, 3 is a car, 4 is a hoistway, 4a is the ceiling of the hoistway 4, 4b is the bottom of the hoistway 4, 5 is a shock absorber, and 8 is a hatch door. is there.

  The elevator composed of the above has a car 3 connected to one end and a counterweight not shown connected to the other end by rotating the hoist 1 around which the main rope 2 is wound under the control of an elevator control device (not shown). By hoisting the main rope 2 and raising and lowering the car 3 and the counterweight in a fishing bottle manner, the car 3 is moved to the front of a desired floor of a plurality of hatch doors 8 facing the hoistway 4. is there. In addition, a shock absorber 5 is provided on the bottom surface 4b of the hoistway 4 to reduce the impact in case the car 3 falls.

  The elevator diagnosis system 10 according to the present embodiment, which is installed in the elevator, mainly includes a sensor device 6 and a monitoring device 7. Since the elevator diagnosis system 10 is a system independent of the elevator control device that controls the operation of the elevator, it can be installed retrospectively as needed even after the installation of the elevator.

  Next, the sensor device 6 and the monitoring device 7 that constitute the elevator diagnosis system 10 will be described in detail with reference to the block diagram of FIG.

  The sensor device 6 is a device that is attached to the hatch door facing surface of the car 3 and detects the acceleration of the car 3 and the magnetic value in the direction of the hatch door 8. Specifically, the geomagnetic sensor 6 a using a geomagnetic sensor is used. And an acceleration detecting unit 6b using a three-axis acceleration sensor, and a monitoring device communication unit 6c for wirelessly transmitting output signals of both detecting units to the monitoring device 7. Since the sensor device 6 is attached to the car 3 such that the x-axis is on the left side of the paper, the y-axis is on the front of the paper, and the z-axis is on the top of the paper, the accelerations Ax, y in the x-axis direction are provided. The acceleration Ay in the axial direction, the acceleration Az in the z-axis direction, and the magnetic value Mx in the x-axis direction can be detected.

  On the other hand, based on the output signal of the sensor device 6, the monitoring device 7 determines whether or not the speed of the car 3 is abnormal when traveling on the end floor, that is, the car 3 collides with the ceiling 4 a of the hoistway 4 and the shock absorber 5. This device diagnoses the possibility of an accident in advance, and if there is a possibility that a speed accident has occurred and there is a possibility of a collision accident, a device that issues a notification to a control center (not shown) via a public line etc. is there. Then, the maintenance personnel in charge are notified of the abnormality of the elevator through the control center that has received the alert, so that the maintenance personnel are dispatched to the site of the elevator where the abnormality was detected before the collision accident occurs. And appropriate maintenance work such as brake repair can be performed.

  As shown in FIG. 2, the monitoring device 7 diagnoses a speed control abnormality during traveling on an end floor based on information output from the sensor device 6 and an alarm unit 7a that issues an alarm to the control center when an abnormality is detected. An abnormality diagnosis unit 7b, a speed calculation unit 7c that calculates the elevating speed of the car 3 from the acceleration Az output from the sensor device 6, and the number of floors of the building where the elevator diagnosis system 10 is installed and before the movement of the car 3 starts And a floor detector 7d for determining which floor the car 3 is currently traveling from based on a change in the magnetic value Mx output from the sensor device 6; A sensor communication unit 7e wirelessly connected to the monitoring device communication unit 6c is provided.

  Note that the monitoring device 7 is actually a computer including an arithmetic device such as a CPU, a main storage device such as a semiconductor memory, an auxiliary storage device such as a hard disk, and hardware such as a communication device. Then, the arithmetic unit executes the program loaded in the main storage device while referring to the database recorded in the auxiliary storage device, so that the alarm unit 7a, the abnormality diagnosis unit 7b, the speed calculation unit 7c, the floor detection unit Each function of the unit 7d and the like is realized, but in the following, description will be given while omitting such known techniques as appropriate.

  Next, an elevator diagnosis method executed by the elevator diagnosis system 10 of the present embodiment will be described with reference to the flowchart of FIG.

First, in step S1, the floor detector 7d of the monitoring device 7 determines whether the hatch door 8 has been detected from the output of the sensor device 6. Magnetic value Mx of the sensor device 6 detects, since the sensor unit 6 and the hatch door 8 is to decrease when the state of facing, floor detector 7d, the magnetic value Mx is less than a predetermined threshold value M _th In this case, it can be determined that the sensor device 6 and the hatch door 8 face each other.

  In step S2, the floor detection unit 7d updates the current position of the car 3. First, the speed calculation unit 7c of the monitoring device 7 calculates the elevating speed Vz of the car 3 by integrating the vertical acceleration Az detected by the sensor device 6, and determines the moving direction of the car 3 from the positive or negative. Determine if it is going up or down. Thereafter, the floor detecting unit 7d increases the stored current position by 1 when it is determined to be ascending, and decreases the stored current position by 1 when it is determined to be descent.

  In step S3, the floor detection unit 7d determines whether the floor through which the car 3 currently passes is one floor below the terminal floor.

Here, the processing of steps S2 and S3 will be specifically described with reference to FIG. FIG. 4 is a graph showing the ascent / descent speed Vz of the car 3 and the magnetic value Mx detected when the car 3 moves from the first floor (lowest floor) to the ninth floor (top floor) in a 9-floor building. It is a graph which showed a change. As shown here, when the car 3 is starting a first floor at time T _0, the lifting speed Vz obtained by integrating the acceleration Az in the vertical direction, after passing through increase period, a substantially constant period of time, the decrease period, arrives at the 9th floor It becomes zero at the time T _2. On the other hand, the magnetic value Mx to be detected during this period equal to or less than the threshold value M _th in conjunction with the passage of the hatch doors 8. Therefore, the floor detecting unit 7d can grasp the current position of the car 3 by sequentially updating the initial current position "1st floor" every time the vehicle passes through the hatch door 8 (step S2). It can be determined whether the vehicle has passed just before the first floor (8th floor) (step S3).

  Although FIG. 4 illustrates an example in which the car 3 rises, the car 3 may be in the same manner as described above in the case where the car 3 rises, but in the same manner as described above, the car 3 is on the first floor of the terminal floor. The passage on the second floor can be detected.

Further, in step S4, the abnormality diagnosis unit 7b detects the ascent / descent speed Va when the car 3 passes through the floor one floor before the terminal floor, which deviates from the normal range determined by the rated speed of the elevator. Diagnose if Specifically, the magnitude of the elevating speed Va is compared with a predetermined threshold _Vth . Here, the threshold value _Vth is not such a speed as to cause a collision accident with the ceiling 4a or the like as soon as the car 3 passes the first floor of the terminal floor at that speed, and is left without maintenance. This is the speed at which a collision with the ceiling 4a or the like is expected to occur in the near future.

Then, in step S5, the abnormality diagnosis unit 7b diagnoses that the speed is abnormal if the elevation speed Va is out of the range of the threshold value _Vth indicating the normal range. Here, the reason why the abnormality diagnosing unit 7b diagnoses based on the ascent / descent speed Va at the time when the car 3 passes through the first floor before the terminal floor, instead of the speed when the car 3 arrives at the terminal floor, will be described. When the presence or absence of an abnormality is diagnosed based on the speed of the car 3 upon arrival at the terminal floor, if the speed, which is almost zero during normal operation, is large enough to detect the abnormality, the deterioration will progress so that a collision accident will occur soon. It is considered that a collision accident may occur before maintenance personnel are dispatched and appropriate maintenance work is performed, and as a standard to prevent the occurrence of a collision accident, While it is considered inappropriate, even if the vehicle is operating normally, if the ascent / descent speed Va when passing through the first floor before the terminal floor where the corresponding speed is output is used as a reference, abnormalities such as brake deterioration can be detected early. This is because the above problem can be avoided.

  In the last step S6, the alarm unit 7a of the monitoring device 7 notifies the control center (not shown) of the occurrence of the abnormality, and through the control center, notifies the maintenance staff in charge of the occurrence of the speed abnormality and exchanges the brake, etc. Direct maintenance work.

  According to the elevator diagnosis system 10 of the present embodiment described above, even in an elevator in which a signal from the elevator control device cannot be used, abnormality such as brake deterioration can be diagnosed at an early stage. Before an accident colliding with the vessel 5 occurs, a maintenance operation can be instructed to a maintenance person via the control center, and the occurrence of a collision accident can be prevented.

  In the elevator diagnosis system 10 according to the above-described embodiment, the abnormality is detected by comparing the threshold value and the speed when the car passes on the first floor in front of the last floor. By comparing the speed at the time of passing one floor before the last floor with the speed at the time of arrival at the last floor, whether the cause of the abnormality is deterioration of the brake or failure of the elevator control device May be estimated.

  Further, in the elevator diagnosis system 10 of the above embodiment, the current position of the car 3 is detected based on the output of the sensor device 6 installed on the hatch door side of the car 3, but the current position of the car 3 is detected by another method. The position may be detected. For example, based on the installation of the sensor device on the counterweight side of the car 3, a mark according to a predetermined rule (for example, a tape of a different color depending on the mounting position) is attached to the main rope, and the mark is provided on the sensor device. The current position of the car 3 may be specified by detecting with a camera or the like.

1 hoisting machine,
2 Main rope,
3 riding basket,
4 hoistway,
5 shock absorber,
6 sensor devices,
6a geomagnetic detector,
6b acceleration detector,
6c communication unit for monitoring device,
7 monitoring devices,
7a Alert department,
7b abnormality diagnosis unit,
7c speed calculator,
7d floor detector,
7e Sensor communication unit,
8 hatch door,
10 Elevator diagnosis system

Claims (6)

An elevator diagnostic system installed in an elevator having a hoist, a main rope wound by the hoist, and a car connected to the main rope,
A sensor device attached to the car and detecting a magnetic value and acceleration;
A monitoring device that calculates an abnormality based on an output of the sensor device and notifies an external control center of an abnormality when the speed at which the car passes through the first floor before the terminal floor exceeds a threshold.
An elevator diagnostic system, comprising: The elevator diagnostic system according to claim 1, wherein
The monitoring device is a hatch door which is determined based on an initial position of the car, a positive / negative value of a vertical speed of the car obtained by integrating a vertical acceleration detected by the sensor device, and a magnetic value detected by the sensor device. An elevator diagnostic system characterized in that it is determined whether or not the car has passed one floor before the terminal floor from the number of passes of the elevator. The elevator diagnostic system according to claim 1, wherein
The monitoring device estimates the cause of the abnormality based on a comparison result of the speed when the car passes one floor before the terminal floor and the speed when the vehicle arrives at the terminal floor. , Elevator diagnostic system. A method of diagnosing an elevator having a hoist, a main rope wound by the hoist, and a car connected to the main rope,
Detecting the passage of the last floor of the car before the first floor,
A method of diagnosing an elevator, wherein an abnormality is notified to an external control center when the speed of the car when passing the first floor of the terminal floor exceeds a threshold. An elevator diagnosis method according to claim 4, wherein
From the initial position of the car, the sign of the ascending and descending speed of the car obtained by integrating the detected vertical acceleration, and the number of passages of the hatch door determined based on the detected magnetic value, the car is the terminal floor. A diagnostic method for an elevator, characterized in that it is determined whether the vehicle has passed the floor on the first floor of the elevator. An elevator diagnosis method according to claim 4, wherein
A method of diagnosing an elevator, comprising estimating a cause of an abnormality based on a comparison result of a speed when the car passes one floor before the terminal floor and a speed when the vehicle arrives at the terminal floor. .

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