WO2020031284A1

WO2020031284A1 - Elevator diagnosis system

Info

Publication number: WO2020031284A1
Application number: PCT/JP2018/029711
Authority: WO
Inventors: 聡西江
Original assignee: 株式会社日立ビルシステム
Priority date: 2018-08-08
Filing date: 2018-08-08
Publication date: 2020-02-13
Also published as: JP6987255B2; CN112384462A; CN112384462B; JPWO2020031284A1

Abstract

In the past, since a control signal for an elevator is required for measuring the landing position of an elevator such as a relay-type elevator from which a meaningful control signal cannot be acquired, measurement or diagnosis for the landing position cannot be performed. Thus, an elevator diagnosis system of the present invention includes: a landing door detection unit which is provided in a car door of a car and detects a landing door; an acceleration measurement unit which is provided in the car door and measures acceleration; and a moving amount measurement unit which measures, as a landing position, a moving amount of the car, which moves from a time when the landing door detection unit detects the landing door after the acceleration measurement unit detects deceleration of the car to a time when the car door opens; and an abnormality diagnosis unit which diagnoses, on the basis of the moving amount, a landing abnormality of the car, wherein, even when an elevator system from which a meaningful control signal cannot be acquired is taken as a diagnosis target, the abnormality can be detected when a landing error is extended due to deterioration over time, etc.

Description

Elevator diagnostic system

The present invention relates to an elevator diagnosis system for detecting an abnormality in a landing error of a car.

In the conventional elevator system, in order to control the stop position of the car, a shielding plate serving as a reference for position detection is installed at a predetermined position in the hoistway, and the shielding plate detection device provided in the car detects the shielding plate. The car has been stopped at a desired landing position by controlling the car moving distance based on the detection position.

However, in this elevator system, it is necessary to increase the number of shield plates installed in the hoistway in proportion to the number of floors at which the car stops, and this causes an increase in the installation cost of the elevator system, especially in a high-rise building. I was

Therefore, instead of a shield plate, a desired landing position control is realized by controlling the landing position of the car based on the landing door while reducing the number of parts of the elevator system (Patent Document 1). 1).

JP 2001-39639 A

However, in Patent Literature 1, since it is necessary to use a control signal of an elevator system to measure a landing position, a relay-type elevator in which a control signal does not exist in the first place, and an elevator made by another company in which the meaning of the control signal is unknown, When an elevator system that cannot acquire a significant control signal is to be diagnosed, there has been a problem that it is not possible to measure a landing position or diagnose a landing error.

Therefore, the present invention provides an elevator diagnostic system capable of detecting an abnormality even when the landing error is enlarged due to aging or the like, even when an elevator system that cannot acquire a significant control signal is to be diagnosed. The purpose is to provide.

In order to solve the above-mentioned problem, in the elevator diagnostic system of the present invention, a landing door detection unit that is provided on the car door of the passenger car and detects the landing door, and an acceleration measurement unit that is provided on the car door and measures acceleration is provided. A moving amount measuring unit that measures a moving amount of the car from when the landing door detecting unit detects the landing door to when the car door is opened as a landing position after the acceleration measuring unit detects the deceleration of the car, and And an abnormality diagnosis unit for diagnosing an abnormal landing of the car on the basis of the amount of movement.

Also, provided on the car door of the car, a hall door detection unit that detects the hall door, an acceleration measurement unit that is provided on the car door and measures acceleration, and after the acceleration measurement unit detects the deceleration of the car, A travel distance measuring unit that measures the travel distance of the car from when the landing door detection unit detects the landing door to when the car stops as the landing position, and an abnormal landing of the car based on the travel distance And an abnormality diagnosis unit for diagnosing the abnormality.

According to the elevator diagnosis system of the present invention, even when an elevator system that cannot acquire a significant control signal is to be diagnosed, it is possible to detect the abnormality when the landing error is enlarged due to aging or the like. it can.

1 is a schematic diagram of an elevator system according to one embodiment. 1 is a configuration diagram of an elevator door opening and closing device according to one embodiment. The figure which shows the change of the speed and magnetic flux density observed during operation | movement of the car of one Example. 5 is a flowchart illustrating a diagnosis process of the elevator diagnosis system according to the embodiment. 7 is a flowchart illustrating a process of detecting a current position of a car according to one embodiment.

Hereinafter, the details of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of an elevator system according to one embodiment of the present invention. As shown here, the elevator system of the present embodiment includes a car 1 that moves up and down between a plurality of landings facing a hoistway, a car door 2 attached to an opening of the car 1, and a car door 2 that opens and closes. A door opening / closing device 3, a three-axis acceleration sensor 4 and a three-axis magnetic sensor 5 installed outside the car door 2, a hoisting machine 6 for elevating and lowering the car 1, and a load at the time of elevating the car 1 A counterweight 7, a pulley 8 for avoiding contact between the car 1 and the counterweight 7, a main rope 9 connecting the counterweight 7 to the car 1, and a metal that opens and closes in conjunction with opening and closing of the car door 2. , A control device 11 for controlling the operation of the elevator system, and a diagnostic device 12 for diagnosing the elevator system based on output signals of the three-axis acceleration sensor 4 and the three-axis magnetic sensor 5. It is. The diagnostic device 12 is connected to an external control center 13 via a wired or wireless communication line.

Among these, the three-axis acceleration sensor 4, the three-axis magnetic sensor 5, and the diagnostic device 12 can be attached even after the elevator system is installed. Constitute an independent elevator diagnostic system. Although FIG. 1 illustrates a building having two landings, the number of landings may be three or more.

The diagnostic device 12 diagnoses the presence or absence of an abnormality in the landing error δ of the car 1 based on the output signals of the three-axis acceleration sensor 4 and the three-axis magnetic sensor 5 and detects the position of the car 1. A car position detecting unit 12a, a car door opening / closing detecting unit 12b for detecting the open / closed state of the car door 2, a car moving amount measuring unit 12c for measuring the moving amount 1 of the car 1, and a running for detecting the running state of the elevator. A state detecting unit 12d, an abnormality diagnosing unit 12e for diagnosing the presence or absence of an abnormality in the landing position L of the car 1 based on a signal from each unit, an initial value storage unit 12f to store the value L ₀ by floor, and landing error storage unit 12g for storing the landing error δ described later by floor, error diagnostic portion 12e is diagnosed as abnormal implantation position L Notify maintenance personnel when an error occurs And Tsunehatsuho portion 12h, and is more configurations.

The diagnostic device 12 is specifically 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 and a speaker. The arithmetic unit executes the program loaded in the main storage device while referring to the database recorded in the auxiliary storage device, thereby realizing the above-described car position detection unit 12a and the like. A description will be given while omitting various well-known techniques as appropriate.

FIG. 2 is a diagram showing the configuration of the car door 2 and the door opening / closing device 3. As shown here, the car door 2 includes a right door panel 2R and a left door panel 2L. The door opening / closing device 3 includes a door rail 3a serving as a track for both door panels, a door machine 3b for generating driving force for both door panels, a door driving belt 3c for transmitting driving force generated by the door machine 3b to both door panels, and a door. It comprises a door pulley 2d for a door driving belt 3c provided in a pair with the machine 3b.

In this embodiment, the three-axis acceleration sensor 4 and the three-axis magnetic sensor 5 are arranged such that the opening / closing direction of the car door 2 is x near the closed end of the left door panel 2L and substantially in the middle in the height direction. The car and the car 1 are installed so that the vertical direction of the car 1 is the y-axis and the front-rear direction of the car 1 is the z-axis. Although FIGS. 1 and 2 illustrate a configuration in which one 3-axis acceleration sensor 4 and one 3-axis magnetic sensor 5 are provided at substantially the center of the car door 2, respectively, the upper and lower parts of the car door 2 are respectively illustrated. The three-axis acceleration sensor 4 and the three-axis magnetic sensor 5 may be provided in the configuration. Note that the two sensors do not necessarily need to be three-axis sensors, and may omit the function of detecting acceleration or magnetic flux density in a direction unnecessary for processing described later.

FIG. 3 is an example of changes in speed and magnetic flux density observed during operation of the elevator system. Specifically, the car 1 moves from the lower floor, which is the standby floor, to the upper floor, which is the destination floor, After the car door 2 is opened and the passenger at the landing on the upper floor gets into the car 1, the elevator speed of the car 1, the opening / closing speed of the car door 2, which is observed until the car door 2 closes, and 3 3 illustrates the outputs of the axial magnetic sensor 5 in the z-axis direction and the x-axis direction.

That is, FIGS. 3A and 3B show the speeds v _y and v _x obtained by integrating the y-axis acceleration a _y and the x-axis direction acceleration a _x detected by the three-axis acceleration sensor 4. These correspond to the ascending and descending speed of the car 1 (positive is the ascending speed, negative is the descending speed) and the opening and closing speed of the car door 2 (positive is the closing speed and negative is the opening speed). Further, FIG. 3 (c), (d) is a magnetic flux density of a three-axis magnetic sensor 5 detects the z-axis direction M _z and x-axis direction of the magnetic flux density M _x, respectively, landing doors 10 direction of the metal detector This corresponds to a state (Low is detected and High is not detected) and the open / closed state of the car door 2 (Low is closed and High is open).

In the figure, the time t _a time when the car 1 ride went through the upper portion of the landing door 10 of the standby floor (lower level), the time t _b is the car 1 is landing door 10 of the destination floor (top floor) time having reached the lower end, indicating the time t _c and the time t _d Wakago open start time and finish of opening time of the door 2, the time t _e and time t _f Wakago clamping start time and the closing completion time of the door 2. Incidentally, there to open and close in conjunction with the landing doors 10 Wakago door 2, respectively at time t _f from time t _c, the opening start time of landing doors 10, open completion time, closing the start time, even in the closed completion time.

When the car 1 moves from the standby floor (lower floor) to the destination floor (upper floor), as shown in FIG. 3A, the car 1 passes through an acceleration period, a constant speed period, and a deceleration period in this order. Reach the destination floor (upper floor). During this time, since the distance from the landing door 10 of the lower floor in the vicinity of the time t _a, as shown in FIG. 3 (c), the magnetic flux density M _z which corresponds to the longitudinal direction of the car 1 is increased. Thereafter, the magnetic flux density _Mz decreases because the vehicle approaches the landing door on the upper floor of the standby floor (lower floor), and the magnetic flux density _Mz increases again as the distance from the landing door increases. Reduction and an increase in magnetic flux density M _z repeats at around the time t _b until close to the landing door 10 of the destination floor (top floor). Therefore, _whether the car 1 is in the vicinity of the landing door 10 can be determined from the magnitude relationship between the magnetic flux density _Mz and the predetermined threshold _{Mz_th} .

Further, when the car 1 reaches the destination floor (upper floor), after the time t _c is opened starting time of the car door 2, 3-axis magnetic sensor 5 the closed end left door panel 2L right door panel which is installed near 2R because away from, as shown in FIG. 3 (d), the magnetic density M _x corresponding to the opening and closing direction of the car door 2 is increased. Then, from around the time t _f is closed completion time of the car door 2, since the left door panel 2L approaches the right door panel 2R, the magnetic density M _x is reduced. Therefore, the magnitude relationship between the magnetic flux density M _x and a predetermined threshold M _{X_th,} it is possible to determine the open or closed state of the car door 2.

Next, a process of diagnosing the landing position of the car 1 by the diagnostic device 12 of this embodiment will be described with reference to FIG.

First, in step S1, the traveling state detecting unit 12d compares the absolute value of the velocity _{v y} obtained by integrating the acceleration _{a y} is the output of the three-axis acceleration sensor 4, the predetermined threshold _{v Y_th} (e.g. 8m / min) If the absolute value of the speed v _y is larger, it is determined that the car 1 is traveling, and the process proceeds to the next step. On the other hand, _if the absolute value of the speed v _y is smaller, step S1 is repeated.

In step S2, when detecting the deceleration of the speed v _y , the traveling state detection unit 12d determines that the car 1 has approached the destination floor and has started deceleration, and proceeds to the next step. On the other hand, when deceleration cannot be detected, the process returns to step S1.

In step S3, the car position detector 12a detects the landing door 10 on the destination floor. Specifically, the car position detection unit 12a monitors the magnetic density _Mz of the three-axis magnetic sensor 5, and when the magnetic density _Mz _becomes smaller than a predetermined threshold _{Mz_th} , the three-axis magnetic sensor 5 attached to the car 1 It is determined to have reached the end of the hall door 10 of the destination floor (the time t _b of Figure 3 _(c)). On the other hand, if the magnetic density _Mz is larger, step S3 is repeated.

In step S4, the car movement amount measuring unit 12c measures the movement amount 1 of the car 1 after reaching the landing door 10 on the destination floor based on the acceleration _ay output from the three-axis acceleration sensor 4.

In step S5, the car position detection unit 12a confirms the current position (current floor F) of the car 1 by referring to the processing result (described later) of FIG. 5 executed in parallel with the processing of FIG. Then, the data is transmitted to the abnormality diagnosis unit 12e.

In step S6, the car door open / close detection unit 12b detects the open / closed state of the car door 2. Specifically, the car door close detection unit 12b monitors the magnetic flux density M _x is the output of the three-axis acceleration sensor 4, if it is larger than the predetermined threshold M _{X_th,} 3 axes attached to the left door panel 2L The magnetic sensor 5 moves away from the right door panel 2R, determines that the car door 2 is in the open state (time tc in FIG. _3D ), and transmits a door opening operation detection signal to the car movement amount measuring unit 12c. On the other hand, if the direction of the magnetic density M _x is small, the flow returns to step S3. Here, although it is determined on the basis of the open or closed state of the car door 2 in the magnetic flux density M _x, may determine the opening and closing state of the car door 2 based on the change in V _x indicating the opening and closing speed of the car door 2 .

In step S7, the car movement amount measurement unit 12c ends the measurement of the movement amount l when the door opening operation detection signal is received from the car door opening / closing detection unit 12b, and sets the measured movement amount l as the landing position L. This is transmitted to the diagnosis unit 12e. In steps S6 and S7, the movement amount l of the car 1 from the detection of the landing door 10 to the start of opening the car door 2 is set to the landing position L, but from the detection of the landing door 10 to the stop of the car 1 The moving amount 1 of the car 1 may be set as the landing position L.

In step S8, the abnormality diagnosing unit 12e, either confirm the initial value L ₀ of the landing position L that has currently corresponding to floor F obtained in step S5 is registered, if the initial value L ₀ is not registered, in step S9, and stored in the initial value storage unit 12f as an initial value L ₀ which currently corresponds to the floor F implantation position L obtained in step S7. On the other hand, if the initial value L ₀ corresponding to the current floor F has been registered, the process proceeds to step S10.

In step S10, the landing position L measured, implantation error storing difference between the initial value L ₀ of the current stored in the initial value storage unit 12f corresponding to floor F, as implantation error δ of the current floor F The information is stored for each floor in the section 12g.

In step S11, the abnormality diagnosis unit 12e detects an abnormality in the landing error δ. Specifically, the abnormality diagnosis unit 12e compares the implantation error δ obtained in step S10 with a predetermined threshold δ _th (for example, 20 mm), and when the implantation error δ is larger, Is determined to be abnormal, and the process proceeds to step S12. On the other hand, if the landing error δ is smaller, it is determined that there is no abnormality, and the processing in FIG. 4 ends.

In step S12, the abnormality diagnosing unit 12e transmits an alarm instruction to the abnormality alarming unit 12h. Upon receiving the notification command, the abnormality notification unit 12h notifies the control center 13 of the current floor F where the abnormality has occurred and the landing error δ as a pair of information. The control center 13 that has received the abnormality report from the diagnostic device 12 contacts a specialized maintenance person and requests a work to correct the landing error δ on the floor where the abnormality has occurred.

Next, a process of detecting the current floor F of the car 1 by the diagnostic device 12 of the present embodiment will be described with reference to FIG. FIG. 5 is a process performed in parallel with FIG. Although not shown, when installing the elevator diagnostic system of the present embodiment, the maintenance staff uses a setting tool (not shown) to determine the total floor number F _max and the initial stop floor F ₀ of the elevator system. Registered.

5. When the processing in FIG. 5 is started, first, in step S51, the car position detection unit 12a determines whether the car 1 is traveling. This processing is equivalent to step S1 in FIG. If the vehicle is running, the process proceeds to step S52.

In step S52, the car position detection unit 12a monitors the magnetic flux density _Mz output from the three-axis magnetic sensor 5, and if the magnetic flux density _Mz decreases, that is, if any metal is detected, the process proceeds to step S53.

In step S53, the car position detection unit 12a uses the acceleration a _y output from the three-axis acceleration sensor 4 to measure the amount of movement l of the car 1 in the y-axis direction during metal detection.

In step S54, the car position detector 12a determines whether the metal detected in step 52 is the landing door 10. Specifically, the car position detection unit 12a compares the movement amount l obtained in step S53 with a predetermined threshold _lth , and when the movement amount l is larger, determines that the metal being detected is the landing door 10. to decide. Here, the threshold l _th may be set to any value that can detect the landing door 10. For example, the following value is set so that other metal devices in the hoistway are not determined to be the landing door 10. Should be set.

Maximum height of other metal equipment in the hoistway <threshold l _th <height of landing door _10/2
In step S55, the car position detection unit 12a acquires the traveling direction information of the car 1 from the traveling state detection unit 12d, and if the traveling direction is rising, the current floor obtained by adding the first floor in step S56. Update to F. On the other hand, if the traveling direction is down, the current floor F is updated in step S57 by subtracting the first floor.

As described above, according to the elevator diagnostic system of the present embodiment, the control signals of the control device of the elevator system are used by using the output signals of the acceleration sensor and the magnetic sensor installed on the car door of the car. Without this, it is possible to diagnose an abnormality in the landing position of the car due to the influence of the aging of the elevator system or the like.

In addition, by using a magnetic sensor, it is possible to detect the door opening / closing operation with higher accuracy, and it is possible to measure the landing position when the door is opened. It is possible to diagnose whether or not there is an abnormality in the landing position.

1 car, 2 car door, 2R right door panel, 2L left door panel, 3 door opener, 3a door rail, 3b door machine, 3c door drive belt, 3d door pulley, 4 3-axis acceleration sensor, 5 3-axis magnetic sensor, 6 winding Upper machine, 7 counterweight, 8 pulley, 9 main rope, 10 landing door, 11 control device, 12 diagnostic device, {12a car position detection unit, 12b car door open / close detection unit, 12c car movement amount measurement unit, 12d running state detection Section, {12e} abnormality diagnosis section, {12f} initial value storage section, {12g} landing error storage section, {12h} abnormality report section

Claims

An elevator diagnostic system that diagnoses an elevator system including a car that moves up and down between a plurality of landings,
A hall door detection unit provided on the car door of the car, for detecting the hall door;
An acceleration measuring unit provided on the car door, for measuring acceleration;
After the acceleration measurement unit detects the deceleration of the car, the landing door detection unit detects the landing door, and measures the movement amount of the car until the car door opens as a landing position. A movement amount measuring unit,
An abnormality diagnosis unit that diagnoses an abnormal landing on the car based on the movement amount;
An elevator diagnostic system comprising:
An elevator diagnostic system that diagnoses an elevator system including a car that moves up and down between a plurality of landings,
A hall door detection unit provided on the car door of the car, for detecting the hall door;
An acceleration measuring unit provided on the car door, for measuring acceleration;
After the acceleration measuring unit detects the deceleration of the car, after the landing door detecting unit detects the landing door, the movement amount of the car until the car stops is measured as a landing position. A moving distance measuring unit,
An abnormality diagnosis unit that diagnoses an abnormal landing on the car based on the movement amount;
An elevator diagnostic system comprising:
The elevator diagnostic system according to claim 1 or 2, wherein:
An elevator diagnosis system, comprising: an abnormality reporting unit that reports a landing abnormality of the car to a control center or maintenance personnel.
The elevator diagnostic system according to claim 1 or 2, wherein:
The elevator diagnosis system, wherein the landing door detection unit, the acceleration measurement unit, the movement amount measurement unit, and the abnormality diagnosis unit are retrofitted to an existing elevator system.
The elevator diagnostic system according to claim 1 or 2, wherein:
Further, an initial value storage unit that stores the landing position initially measured for each of the plurality of landings as an initial value,
A landing error storage unit that stores a difference between the landing position last measured for each of the plurality of landings and the initial value as a landing error,
An elevator diagnostic system comprising:
An elevator diagnostic system that diagnoses an elevator system including a car that moves up and down between a plurality of landings,
An acceleration sensor installed on the car door of the car,
A magnetic sensor installed on the car door,
A traveling state detection unit that detects a traveling state of the car based on an output signal of the acceleration sensor,
Based on the output signal of the acceleration sensor, a car movement amount measurement unit that measures the movement amount of the car,
A car position detection unit that detects a current position of the car based on output signals of the acceleration sensor and the magnetic sensor,
Based on an output signal of the acceleration sensor or the magnetic sensor, a car door open / close detection unit that detects the open / close state of the car door,
Based on the output signals of the traveling state detection unit, the car movement amount measurement unit, the car position detection unit, and the car door open / close detection unit, the landing error of the car is measured, and the landing error is a predetermined threshold. An abnormality diagnosis unit for diagnosing an implantation abnormality when
An elevator diagnostic system comprising:
The elevator diagnostic system according to claim 6, wherein:
The abnormality diagnosis unit detects a landing door of a destination floor based on an output signal of the magnetic sensor, and calculates a movement amount of the car until the car door opening / closing detection unit detects opening of the car door. An elevator abnormality diagnosis system, wherein a floor position is set, and a difference between an initial value of the landing position and a measured value is set as a landing error.