JP7601287B2 - Anomaly detection system and elevator system - Google Patents

Description

The present disclosure relates to an anomaly detection system and an elevator system.

Patent Document 1 discloses an elevator operation status diagnosis system. The elevator operation status diagnosis system described in Patent Document 1 includes an acceleration sensor, a current sensor, and an elevator operation status diagnosis device. The acceleration sensor detects the running motion of the car. The current sensor detects the current flowing through the door motor that opens and closes the car doors. The elevator operation status diagnosis device determines the elevator operation status based on the running motion of the car and the rotational motion of the door motor.

Japanese Patent Publication No. 2020-147424

However, the elevator operation status diagnosis system described in Patent Document 1 determines the state of the car doors based on the current flowing through the door motor. It cannot detect elevator abnormalities that occur when the car doors do not open or close in conjunction with the rotation of the door motor.

This disclosure has been made to solve the above-mentioned problems. The purpose of this disclosure is to provide an abnormality detection system that can detect elevator abnormalities that occur when the car doors do not open or close in conjunction with the rotational operation of the door motor.

The anomaly detection system according to the present disclosure is an anomaly detection system used in an elevator including a car, the car including a first door motor and a first car door, the car being provided with the first car door that opens and closes by the first door motor. The anomaly detection system includes a first signal device that outputs a first signal in response to an opening and closing operation of the first car door, a second signal device that outputs a second signal in response to a rotation operation of the first door motor, and an anomaly detection device. The anomaly detection device includes a determination unit that determines whether or not there is an abnormality in the elevator based on a change in the first signal and a change in the second signal, and a transmission unit that transmits the result determined by the determination unit to a monitoring device that monitors the elevator. The elevator includes an interlocking mechanism that is driven by the first door motor to open and close the first car door. The determination unit performs an anomaly determination to determine whether or not there is an abnormality in the interlocking mechanism based on the change in the first signal and the change in the second signal. In the abnormality determination, the determination unit determines whether or not the first door motor has a rotational motion for opening and closing the first car door based on a change in the second signal, and if it is determined that the first door motor has a rotational motion for opening and closing the first car door, determines whether or not the first car door has an opening and closing motion linked to the rotational motion of the first door motor based on the change in the first signal, and if it is determined that the first car door does not have an opening and closing motion linked to the rotational motion of the first door motor, determines that there is an abnormality in the interlocking mechanism.

Moreover, an elevator system according to the present disclosure comprises an elevator having a car with a first car door that opens and closes by a first door motor, and an anomaly detection system. The anomaly detection system comprises a first signal device, a second signal device, and an anomaly detection device. The first signal device outputs a first signal corresponding to the opening and closing operation of the first car door. The second signal device outputs a second signal corresponding to the rotation operation of the first door motor. The anomaly detection device comprises a determination unit that determines whether or not there is an abnormality in the elevator based on a change in the first signal and a change in the second signal, and a transmission unit that transmits the result determined by the determination unit to a monitoring device that monitors the elevator. The elevator comprises an interlocking mechanism that is driven by the first door motor to open and close the first car door. The determination unit performs an anomaly determination to determine whether or not there is an abnormality in the interlocking mechanism based on the change in the first signal and the change in the second signal. In the abnormality determination, the determination unit determines whether or not the first door motor has a rotational motion for opening and closing the first car door based on a change in the second signal, and if it is determined that the first door motor has a rotational motion for opening and closing the first car door, determines whether or not the first car door has an opening and closing motion linked to the rotational motion of the first door motor based on the change in the first signal, and if it is determined that the first car door does not have an opening and closing motion linked to the rotational motion of the first door motor, determines that there is an abnormality in the interlocking mechanism.

According to the present disclosure, the abnormality detection system includes a first signal device that outputs a first signal corresponding to the opening and closing operation of the car door, a second signal device that outputs a second signal corresponding to the rotational operation of the first door motor, and an abnormality detection device having a determination unit that determines whether or not there is an abnormality in the elevator based on a change in the first signal and a change in the second signal. Therefore, it is possible to detect an abnormality in the elevator that occurs when the car door does not open or close in conjunction with the rotational operation of the door motor.

1 is a diagram showing an example of a building to which the anomaly detection system in embodiment 1 is applied; FIG. 2 is a front view of a car in which the anomaly detection system in the first embodiment is installed. 2 is a diagram for explaining the function of the anomaly detection system in embodiment 1. FIG. FIG. 2 is a hardware configuration diagram of the anomaly detection system according to the first embodiment. 11 is a flowchart for explaining an overview of the operation of the anomaly detection system in embodiment 2. 13 is a flowchart for explaining an overview of the operation of the anomaly detection system in embodiment 3. 13 is a flowchart for explaining an overview of boarding determination based on the traveling operation of the car and the opening and closing operation of the car door in embodiment 4. 13 is a flowchart for explaining an overview of occupancy determination based on vibration detection in embodiment 4. FIG. 13 is a front view of a car in which an anomaly detection system in embodiment 5 is installed. A figure showing an example of a building to which the anomaly detection system in embodiment 6 is applied. FIG. 23 is a rear view of a car in which an anomaly detection system in embodiment 6 is installed.

The embodiments for implementing the present disclosure will be described with reference to the attached drawings. In each drawing, the same or corresponding parts are given the same reference numerals. Duplicate descriptions of the parts will be appropriately simplified or omitted.

Embodiment 1.
FIG. 1 is a diagram showing an example of a building to which the anomaly detection system according to the first embodiment is applied.

The elevator comprises a car 1, a hoist 2, a main rope 3, a counterweight 4, and a control device 5. A hoistway 6 runs through each floor of the building. A machine room 7 is provided above the hoistway 6. A landing 8 is provided on each floor of the building.

The car 1 is hung on one side of the main rope 3. The main rope 3 is wound around the hoist 2. The hoist 2 moves the main rope 3 in the longitudinal direction. This causes the car 1 to rise and fall inside the hoistway 6. The counterweight 4 is hung on the other side of the main rope 3. The counterweight 4 rises and falls in the direction opposite to that of the car 1.

The hoisting machine 2 and the control device 5 are installed in the machine room 7. The control device 5 is electrically connected to the hoisting machine 2. The control device 5 is electrically connected to the equipment of the car 1. The control device 5 controls the entire elevator. The hoisting machine 2 is controlled by the control device 5.

The car 1 has a rectangular parallelepiped shape. An entrance and exit are formed in the car 1. The car 1 has a pair of car doors 9. The car doors 9 are installed at the entrance and exit of the car 1. A landing door 10 is installed at the landing 8 on each floor. The car door 9 faces the landing door 10.

The car 1 may also be applied to an elevator without a machine room 7. In that case, the hoist 2 and the control device 5 are provided at the bottom or top of the elevator shaft 6.

Next, the configuration of the anomaly detection system in the first embodiment will be described with reference to FIG.
Fig. 2 is a front view of the car 1 in which the anomaly detection system in the embodiment 1 is installed. Fig. 2 is a view of the car 1 as seen from the hall 8 side.

The abnormality detection system 50 is used in elevators.

2, the car 1 further includes a car door rail 11, a threshold 12, a door motor 13, a car door interlocking mechanism 14, and a car ceiling 15. The car door 9 opens and closes the entrance and exit of the car 1.

The pair of car doors 9 are of a double-hinged type. One of the pair of car doors 9 is provided on one side of the entrance/exit of car 1. The other of the pair of car doors 9 is provided on the other side of the entrance/exit of car 1. In FIG. 1, the pair of car doors 9 are fully closed. Each of the pair of car doors 9 has a connecting portion 16. The connecting portions 16 are provided in pairs. The connecting portions 16 are provided on the upper part of the car door 9.

The car door rail 11 is provided above the entrance/exit of the car 1. The car door rail 11 is provided horizontally. The car door 9 is suspended from the car door rail 11. The movement of the upper part of the car door 9 is guided by the car door rail 11. The car ceiling 15 is installed on the upper part of the car 1. The lower surface of the car ceiling 15 forms the ceiling surface of the car 1.

The threshold 12 is provided below the entrance of the car 1. The movement of the lower part of the car door 9 is guided by the threshold 12. The car door 9 opens and closes along the car door rail 11 and the threshold 12.

The door motor 13 is installed on the car ceiling 15. The door motor 13 may be provided on one end of the car door rail 11. The door motor 13 is electrically connected to the control device 5. The door motor 13 is controlled by the control device 5. The door motor 13 performs a rotational operation in which the rotating shaft rotates under the control of the control device 5. The door motor 13 generates a driving force for opening and closing the car door 9 through the rotational operation. The car door 9 opens and closes through the rotational operation of the door motor 13.

The car door interlocking mechanism 14 is connected to the door motor 13. The car door interlocking mechanism 14 is connected to the connecting portion 16. The car door interlocking mechanism 14 is driven by the door motor 13 to open and close the car door 9.

The car door interlocking mechanism 14 may include, for example, a pair of pulleys 17 and a belt 18. One of the pair of pulleys 17 is provided above one end of the car door rail 11. The other of the pair of pulleys 17 is provided above the other end of the car door rail 11. The belt 18 is wound around the pair of pulleys 17. The belt 18 is connected to the pair of connecting portions 16.

One of the pair of pulleys 17 rotates following the rotation of the rotary shaft of the door motor 13. The belt 18 moves in a circular motion following the rotation of one of the pair of pulleys 17. The pair of connecting parts 16 move following the circular motion of the belt 18. As a result, the car door 9 is opened and closed by the door motor 13.

The abnormality detection system 50 comprises a signal device 19, a signal device 20, a signal device 21, and an abnormality detection device 22.

The signal device 19 is connected to the abnormality detection device 22. The signal device 19 outputs a signal A corresponding to the running operation of the car 1. The signal device 19 detects the running operation of the car 1, such as rising, falling, and stopping. The signal device 19 outputs the detected running operation of the car 1 as a signal A. The signal device 19 transmits the signal A to the abnormality detection device 22. The signal device 19 may be an accelerometer. The signal A may be a signal indicating the acceleration of the car 1. The signal A may be a signal indicating the position of the car 1. It is sufficient for the signal device 19 to be able to obtain information corresponding to the acceleration of the car 1. Therefore, the signal device 19 may detect the running speed of the car 1. In that case, the acceleration of the car 1 can be obtained by differentiating the running speed of the car 1.

The signal device 19 may be installed on the car ceiling 15. The signal device 19 may be installed anywhere as long as it can obtain the running operation of the car 1.

The signal device 20 is connected to the abnormality detection device 22. The signal device 20 outputs a signal B corresponding to the opening and closing operation of the car door 9. The signal device 20 detects the opening and closing operations of the car door 9, such as the door opening operation, the door closing operation, and the stop operation. The signal device 20 outputs the detected opening and closing operation of the car door 9 as a signal B. The signal device 20 transmits the signal B to the abnormality detection device 22. The signal device 20 may be an accelerometer. The signal B may be a signal indicating the acceleration of the car door 9. The signal A may be a signal indicating the position of the car 1. It is sufficient for the signal device 20 to be able to obtain information corresponding to the acceleration of the car door 9. Therefore, the signal device 20 may detect the opening and closing speed of the car door 9. In that case, the acceleration of the car door 9 can be obtained by differentiating the opening and closing speed of the car door 9.

The signaling device 20 may be installed on one or the other of the pair of car doors 9.

The signal device 21 is connected to the abnormality detection device 22. The signal device 21 outputs a signal C corresponding to the rotational movement of the door motor 13. The signal device 21 detects the rotational movement of the door motor 13. The signal device 21 outputs the detected rotational movement of the door motor 13 as a signal C. The signal device 21 transmits the signal C to the abnormality detection device 22. The signal device 21 may be an ammeter. The signal C may be a signal indicating the motor current of the door motor 13. The signal device 21 may measure a motor current command from the control device 5.

The signal device 21 may be installed on the door motor 13. The signal device 21 may be installed on a cable connected to the control device 5.

The abnormality detection device 22 may be installed above the car ceiling 15. The abnormality detection device 22 may be installed anywhere. The abnormality detection device 22 is a device that processes signals A, B, and C. The abnormality detection device 22 may be a PC on which dedicated software capable of determining an abnormality is installed. The dedicated software installed in the abnormality detection device 22 incorporates determination conditions for performing various abnormality determinations.

Figure 3 is a diagram for explaining the function of the anomaly detection system 50 in embodiment 1.

The abnormality detection device 22 has a receiving unit 23, a judgment unit 24, and a transmitting unit 25.

The receiving unit 23 receives signal A from signal device 19. The receiving unit 23 receives signal B from signal device 20. The receiving unit 23 receives signal C from signal device 21.

The judgment unit 24 may judge whether or not there is an abnormality in the running operation of the car 1 based on the change in signal A. The judgment unit 24 may judge whether or not there is an abnormality in the elevator based on the change in signal B and the change in signal C. The judgment unit 24 may judge whether or not there is an abnormality in the opening and closing operation of the car door 9 based on the change in signal B and the change in signal C.

The car door 9 opens and closes in conjunction with the door motor 13. Therefore, the change in signal C is linked to the change in signal B. The judgment unit 24 may judge whether the change in signal C is linked to the change in signal B. The judgment unit 24 judges that there is an abnormality when the change in signal C is not linked to the change in signal B. The judgment unit 24 may judge whether there is an abnormality in the elevator based on the change in signal A, the change in signal B, and the change in signal C.

The transmission unit 25 transmits the result of the determination made by the determination unit 24 to a monitoring device 26 that monitors the elevator to which the anomaly detection system 50 is applied. The monitoring device 26 may be a support center. The monitoring device 26 may be installed in a management office of a building in which the anomaly detection system 50 is installed. The transmission unit 25 may transmit the result of the determination to the monitoring device 26 only when the determination unit 24 determines that an abnormality exists.

The abnormality detection system 50 does not communicate with each elevator device, such as the control device 5.

An elevator system may be used to detect elevator abnormalities. The elevator system includes an elevator having a car 1 with car doors 9 that open and close using a door motor 13, and an abnormality detection system 50.

According to the above-described embodiment 1, the abnormality detection system 50 includes a signal device 20, a signal device 21, and an abnormality detection device 22. The abnormality detection system 50 detects the rotational operation of the door motor 13 and the opening and closing operation of the car door 9. The judgment unit 24 of the abnormality detection device 22 judges whether or not a change in signal C is linked to a change in signal B. This makes it possible to detect an abnormality such as the car door 9 not performing an opening or closing operation linked to the rotational operation of the door motor 13, even though the door motor 13 is performing a rotational operation to open and close the car door 9. Therefore, it is possible to detect an elevator abnormality caused by the car door 9 not performing an opening or closing operation linked to the rotational operation of the door motor 13.

Furthermore, generally, a system that determines an elevator abnormality solely from the opening and closing movement of the car doors 9 cannot determine whether the door motor 13 is rotating. Therefore, similar to Patent Document 1, it cannot detect an elevator abnormality that occurs when the car doors 9 do not open or close in conjunction with the rotational movement of the door motor 13. By making a determination based on the changes in signals B and C, the abnormality detection system 50 can detect an elevator abnormality that occurs when the car doors 9 do not open or close in conjunction with the rotational movement of the door motor 13.

The abnormality detection system 50 further includes a signal device 19. This makes it possible to determine an abnormality in the elevator based on the traveling operation of the car 1. Furthermore, it is possible to determine an abnormality in the elevator based on the change in signal A, the change in signal B, and the change in signal C.

In addition, the transmission unit 25 of the abnormality detection device 22 transmits the result of the judgment made by the judgment unit 24 to the monitoring device 26. Thus, an abnormality occurring in the elevator can be reported.

In addition, generally, if an elevator becomes unusable, such as when a person is trapped in the cage, a monitoring system installed in the elevator detects the abnormal condition. The monitoring system reports the abnormality to a support center. This establishes a system in which an engineer is dispatched and the elevator is restored by the engineer. In order to monitor the elevator, a dedicated monitoring system for each manufacturer that needs to be connected to the elevator is required. The management device is configured to correspond to each model. The abnormality detection system 50 does not communicate with each elevator device such as the control device 5. Direct communication between the abnormality detection system 50 and each elevator device such as the control device 5 is not required. Therefore, the abnormality detection system 50 can be realized with a configuration independent of the elevator. This allows elevators to be monitored on a common platform regardless of the elevator manufacturer and model.

The anomaly detection system 50 can also monitor the elevator status if the elevator is equipped with a door motor 13 and a car 1 equipped with car doors 9 that open and close by the door motor 13. Therefore, the system may be installed not only in elevators used by passengers, but also in elevators dedicated to handling small parcels.

An elevator system may also be used to detect elevator abnormalities. The elevator system includes an elevator equipped with a car 1 equipped with car doors 9 that open and close by a door motor 13, and an abnormality detection system 50. In this case as well, it is possible to detect elevator abnormalities that occur when the car doors 9 do not open or close in conjunction with the rotational operation of the door motor 13.

The abnormality detection system 50 further includes a signal device 19, a signal device 20, a signal device 21, and an abnormality detection device 22. The signal device 19 may be installed on the car ceiling 15. The signal device 20 may be installed on one or the other of the pair of car doors 9. The signal device 21 may be installed on the door motor 13. The abnormality detection device 22 may be installed on the car ceiling 15. This does not require a complex configuration and makes construction easy.

Next, an example of hardware constituting the anomaly detection system 50 will be described with reference to FIG.
FIG. 4 is a hardware configuration diagram of the anomaly detection system 50 according to the first embodiment.

The anomaly detection system 50 includes, as hardware resources, a processing circuit 100 including a processor 100a and a memory 100b. The processing circuit 100 may include multiple processors 100a. The processing circuit 100 may include multiple memories 100b. The processing circuit 100 may include dedicated hardware 200. The processing circuit 100 may include multiple dedicated hardware 200.

For example, each function of the anomaly detection system 50 is realized by the processing circuit 100. For example, each function of the anomaly detection system 50 is realized collectively by the processing circuit 100. The processing circuit 100 includes a processor 100a and a memory 100b, but does not need to include dedicated hardware 200.

When the processing circuit 100 includes a processor 100a and a memory 100b, each function of the anomaly detection system 50 is realized by software, firmware, or a combination of software and firmware. The software and firmware are written as programs. The software and firmware are stored in the memory 100b. The processor 100a realizes each function of the anomaly detection system 50 by reading and executing the programs stored in the memory 100b.

The processor 100a is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. For example, the memory 100b is a non-volatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.

When the processing circuit 100 comprises dedicated hardware 200, the processing circuit 100 may be implemented, for example, as a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

Some of the functions of the anomaly detection system 50 may be realized by dedicated hardware 200, and the other parts may be realized by software or firmware. For example, the function of transmitting the determination result to the monitoring device 26 may be realized by the processing circuit 100 as the dedicated hardware 200, and functions other than the function of transmitting the determination result to the monitoring device 26 may be realized by the processor 100a reading and executing a program stored in the memory 100b.

In this way, the processing circuit 100 realizes each function of the anomaly detection system 50 through hardware 200, software, firmware, or a combination of these.

Embodiment 2.
Next, an overview of the operation of the anomaly detection system 50 in the second embodiment will be described with reference to Fig. 5. Fig. 5 is a flowchart for explaining the overview of the operation of the anomaly detection system 50 in the second embodiment. Note that the same reference numerals are used to designate parts that are the same as or equivalent to parts in the first embodiment. Descriptions of these parts will be omitted.

The abnormality detection system 50 may determine whether or not there is an abnormality in the car door interlocking mechanism 14. Figure 5 is a flowchart for explaining an overview of the operation of the abnormality detection system 50 when determining whether or not there is an abnormality in the car door interlocking mechanism 14.

In S101, the receiving unit 23 receives signal A from the signal device 19. Next, in S102, the judgment unit 24 judges whether or not car 1 is moving up or down based on the change in signal A received by the receiving unit 23. If it is judged that car 1 is moving up or down, the judgment unit 24 judges YES in S102. If it is judged that car 1 is not moving up or down, the judgment unit 24 judges NO in S102. If it is judged NO in S102, the receiving unit 23 receives signal A from the signal device 19 in S101.

If the result of the judgment in S102 is YES, then in S103 the receiving unit 23 receives signal A from the signal device 19. Next, in S104 the judgment unit 24 judges whether or not car 1 has stopped based on the change in signal A received by the receiving unit 23. If it is judged that car 1 has stopped, the judgment unit 24 judges YES in S104. If it is judged that car 1 has not stopped, the judgment unit 24 judges NO in S104. If the result of the judgment in S104 is NO, then the receiving unit 23 receives signal A from the signal device 19 in S103.

If the determination in S104 is YES, then in S105 the receiving unit 23 receives a signal C from the signal device 21. Next, in S106 the judgment unit 24 judges whether or not the door motor 13 is performing a rotational motion for opening and closing the car door 9 based on a change in the signal C received by the receiving unit 23. If it is determined that the door motor 13 is performing a rotational motion for opening and closing the car door 9, the judgment unit 24 judges YES in S106. If it is determined that the door motor 13 is not performing a rotational motion for opening and closing the car door 9, the judgment unit 24 judges NO in S106.

If the result of the judgment in S106 is NO, in S107, the judgment unit 24 judges that the car door 9 did not open or close after the car 1 ran and stopped. Also, in S107, it may be determined that a person was trapped. Next, in S112, the transmission unit 25 transmits the result of the judgment made by the judgment unit 24 in S107 to the monitoring device 26.

If the determination in S106 is YES, then in S108 the receiving unit 23 receives signal B from the signal device 20. Next, in S109 the judgment unit 24 judges whether or not there is an opening/closing operation of the car door 9 linked to the rotational operation of the door motor 13 based on a change in signal B received by the receiving unit 23. If it is determined that there is an opening/closing operation of the car door 9 linked to the rotational operation of the door motor 13, the judgment unit 24 judges YES in S109. If it is determined that there is no opening/closing operation of the car door 9 linked to the rotational operation of the door motor 13, the judgment unit 24 judges NO in S109.

If the result of S109 is NO, the determination unit 24 determines in S110 that there is an abnormality in the car door interlocking mechanism 14. Next, in S112, the transmission unit 25 transmits the result of the determination made by the determination unit 24 in S110 to the monitoring device 26.

If the answer is YES in S109, the determination unit 24 determines in S111 that the elevator is operating normally. Next, in S112, the transmission unit 25 transmits the result of the determination made by the determination unit 24 in S111 to the monitoring device 26.

In addition, when the anomaly detection system 50 performs the operation of S111, it is not necessary to perform the operation of S112. In this case, the transmission unit 25 may transmit only the judgment results of S110 and S107 to the monitoring device 26.

In addition, with regard to the operations S101 to S104, the judgment unit 24 may determine whether there is a change in signal A indicating a series of operations such as car 1 running and stopping.

It should be noted that the abnormality detection system 50 does not need to perform the operations from S101 to S104. In this case, the abnormality detection system 50 may perform the operations from S105 to S112 to determine whether or not there is an abnormality in the car door interlocking mechanism 14.

According to the second embodiment described above, the judgment unit 24 judges whether or not the door motor 13 is performing a rotational motion for opening and closing the car door 9 based on a change in signal C. If the door motor 13 is performing a rotational motion for opening and closing the car door 9, the judgment unit 24 judges whether or not the car door 9 is performing an opening or closing motion based on a change in signal B. If the car door 9 is not performing an opening or closing motion linked to the rotational motion of the door motor 13, it is judged that there is an abnormality in the car door interlocking mechanism 14. This makes it possible to judge whether or not there is an abnormality in the car door interlocking mechanism 14.

In addition, when the anomaly detection system 50 performs the operation of S111, it is not necessary to perform the operation of S112. In this case, the transmission unit 25 may transmit only the judgment results of S110 and S107 to the monitoring device 26. This makes it possible to notify the monitoring device 26 only when there is an abnormality in the elevator.

In addition, the abnormality detection system 50 does not have to perform the operations of S101 to S104. In this case, the abnormality detection system 50 may perform the operations of S105 to S112 to determine whether or not there is an abnormality in the car door interlocking mechanism 14. This allows the determination unit 24 to determine whether or not there is an abnormality in the car door interlocking mechanism 14 based on changes in the two signals, signal B and signal C.

The abnormality detection system 50 also determines whether there is an abnormality in the car door interlocking mechanism 14 based on the change in signal A, the change in signal B, and the change in signal C. Because abnormality determination can be made based on three signals, no complex processing is required.

Embodiment 3.
Next, an overview of the operation of the anomaly detection system 50 in the third embodiment will be described with reference to Fig. 6. Fig. 6 is a flowchart for explaining the overview of the operation of the anomaly detection system 50 in the third embodiment. Note that the same reference numerals are used to designate parts that are the same as or equivalent to parts in the first and second embodiments. Descriptions of these parts will be omitted.

The anomaly detection system 50 may perform a confinement determination as to whether or not entrapment has occurred in car 1. Figure 6 is a flowchart for explaining an overview of the operation of the anomaly detection system 50 when performing a confinement determination in car 1.

The operations from S201 to S206 are the same as the operations from S101 to S106 described in embodiment 2. If the result of the judgment in S206 is NO, the judgment unit 24 judges in S207 that entrapment has occurred in cage 1. Next, in S212, the transmission unit 25 transmits the result of the judgment made by the judgment unit 24 in S207 to the monitoring device 26.

If the determination in S206 is YES, the operations from S208 to S209 are performed. The operations from S208 to S209 are the same as the operations from S108 to S109 described in embodiment 2. If the determination in S209 is NO, the determination unit 24 determines in S210 that entrapment has occurred in cage 1. Next, in S212, the transmission unit 25 transmits the result determined by the determination unit 24 in S210 to the monitoring device 26.

If the answer is YES in S209, the determination unit 24 determines in S211 that the elevator is operating normally. Next, in S212, the transmission unit 25 transmits the result of the determination made by the determination unit 24 in S211 to the monitoring device 26.

In addition, when the anomaly detection system 50 performs the operation of S211, it is not necessary to perform the operation of S212. In this case, the transmission unit 25 may transmit only the judgment results of S210 and S207 to the monitoring device 26.

According to the third embodiment described above, the determination unit 24 determines whether the car 1 has traveled and stopped based on the change in signal A. The determination unit 24 determines whether the door motor 13 has a rotational motion for opening and closing the car door 9 based on the change in signal C. If the door motor 13 does not have a rotational motion for opening and closing the car door 9, the determination unit 24 determines that entrapment has occurred in the car 1. If the door motor 13 has a rotational motion for opening and closing the car door 9, the determination unit 24 determines whether the car door 9 has an opening and closing motion based on the change in signal B. If the car door 9 does not have an opening and closing motion linked to the rotational motion of the door motor 13, the determination unit 24 determines that entrapment has occurred in the car 1. This allows for entrapment determination. Therefore, even if the car door 9 does not have an opening and closing motion linked to the rotational motion of the door motor 13, it is possible to detect that entrapment has occurred.

In addition, when the anomaly detection system 50 performs the operation of S211, it does not necessarily have to perform the operation of S212. This allows the system to notify the monitoring device 26 only when an abnormality occurs in the elevator.

In addition, the abnormality detection system 50 performs a lock-in determination based on the change in signal A, the change in signal B, and the change in signal C. Since the lock-in determination can be performed based on three signals, no complicated processing is required.

Embodiment 4.
Next, an overview of the boarding determination operation in the fourth embodiment will be described with reference to Figures 7 and 8. Note that the same or corresponding parts as those in the first to third embodiments are denoted by the same reference numerals, and the description of these parts will be omitted.

When no one is in car 1, such as after a person gets on or off car 1, car 1 may automatically move to a specified floor. The entrapment determination described in embodiment 3 may be performed when a person is in car 1. Therefore, the abnormality detection system 50 may perform an aboard determination, and start a entrapment determination when it is determined that a person is in car 1.

The boarding determination operation may be performed using signals A, B, and C. Figure 7 is a flowchart for explaining an overview of boarding determination based on the running operation of car 1 and the opening and closing operation of car door 9 in embodiment 4.

The operations from S301 to S306 are the same as the operations from S101 to S106 described in embodiment 2. If NO is determined in S306, the determination unit 24 determines in S307 that car 1 has moved to the specified floor. After S307, the anomaly detection system 50 may terminate its operation.

If the determination in S306 is YES, the operations from S308 to S309 are performed. The operations from S308 to S309 are the same as the operations from S108 to S109 described in embodiment 2. If the determination in S309 is NO, the judgment unit 24 determines in S310 that there is an abnormality in the car door interlocking mechanism 14. Next, in S313, the transmission unit 25 transmits the result determined by the judgment unit 24 in S310 to the monitoring device 26.

If S309 returns YES, the judgment unit 24 judges in S311 that a person is in car 1. Next, in S312, the abnormality detection system 50 starts a confinement judgment.

The operation of passenger boarding determination may also be performed using signal A. Signal device 19 may detect the vibration of car 1 when a person boards car 1. Signal device 19 may detect the vibration of car 1 from the acceleration of car 1. In this case, signal A is a signal indicating acceleration. Figure 8 is a flowchart for explaining an overview of passenger boarding determination based on vibration detection in embodiment 4.

The operation of S401 is the same as the operation of S101 described in embodiment 2. Following S401, in S402, the judgment unit 24 judges whether or not there is vibration indicating that a person has entered cage 1, based on a change in signal A received by the receiving unit 23. If it is judged that there is vibration indicating that a person has entered cage 1, the judgment unit 24 judges YES in S402. If it is judged that there is no vibration indicating that a person has entered cage 1, the judgment unit 24 judges NO in S402. If it is judged NO in S402, the receiving unit 23 receives signal A from the signal device 19 in S401.

If S402 returns YES, the judgment unit 24 judges in S403 that a person is in car 1. Next, in S404, the abnormality detection system 50 starts a confinement judgment.

According to the embodiment 4 described above, the judgment unit 24 judges that a person is on board when the car door 9 opens and closes after the car 1 has traveled and stopped. The judgment unit 24 also judges that a person is on board when there is vibration indicating that a person is getting on board the car 1. This makes it possible to determine whether or not a person is on board. Therefore, when the car 1 moves to a specified floor with no person on board, it is possible to prevent a false detection that the car door 9 will not open and that a person is trapped. Therefore, it is possible to accurately start a trapping judgment.

Embodiment 5.
Next, the mounting position of the signal device 20 in the fifth embodiment will be described with reference to Fig. 9. Fig. 9 is a front view of the car 1 in which the anomaly detection system 50 in the fifth embodiment is installed. Note that the same reference numerals are used to denote parts that are the same as or equivalent to parts in the first to fourth embodiments. Descriptions of these parts will be omitted.

The signal device 20 may be installed at any position on the pair of car doors 9. The signal device 20 may be installed on one of the pair of connecting portions 16. It is desirable to install the signal device 20 on the car door 9 in order to accurately detect the opening and closing operation of the car door 9.

The signal device 20 may be installed under the car door 9. The signal device 20 may be installed on the car door rail 11. A plurality of signal devices 20 may be provided. In that case, the signal device 20 may be installed both under the car door 9 and on the car door rail 11.

According to the fifth embodiment described above, the signal device 20 may be installed at any position on the pair of car doors 9. This allows the signal device 20 to be easily installed.

In addition, the signal device 20 can be installed under the car door 9. This improves the accuracy of detecting conditions that cause abnormalities in the opening and closing operation of the car door 9, such as when a foreign object is stuck in the threshold 12.

The signal device 20 can also be installed on the car door rail 11. This improves the accuracy of detecting conditions that cause abnormalities in the opening and closing operation of the car door 9, such as when a foreign object is attached to the car door rail 11.

In addition, multiple signal devices 20 may be provided. In that case, the signal devices 20 can be installed both under the car door 9 and on the car door rail 11. This makes it possible to simultaneously monitor both abnormalities in the threshold 12 and abnormalities in the car door rail 11.

Embodiment 6.
Next, the installation of the signal device 20 and the signal device 21 in the sixth embodiment will be described with reference to Fig. 10 and Fig. 11. Fig. 10 is a diagram showing an example of a building to which the anomaly detection system 50 in the sixth embodiment is applied. Fig. 11 is a rear view of a car 1 in which the anomaly detection system 50 in the sixth embodiment is installed. Note that the same reference numerals are used to denote parts that are the same as or equivalent to parts in the first to fifth embodiments. Descriptions of these parts will be omitted.

The anomaly detection system 50 may be applied to an elevator with two-way doors. The side on which the car door 9 of the car 1 is installed is referred to as the front side. The side parallel to the surface on which the car door 9 of the car 1 is installed is referred to as the rear side. In the following, the components of the car 1 installed on the front side are identified by adding the letter a after the reference symbol. The components of the car 1 installed on the rear side are identified by adding the letter b after the reference symbol.

The front side of the car 1 on which the anomaly detection system 50 is installed is configured in the same manner as in FIG. 2. An entrance/exit is formed on the rear side of the car 1, similar to the front side. The car 1 further includes a car door 9b. A car door 9b is installed at the entrance on the rear side of the car 1, similar to the front side.

At least one of the multiple landings 8 is installed on the front side. At least one of the multiple landings is installed on the rear side. A landing door 10 is also installed on the landing 8 installed on the rear side. The car door 9b faces the landing door 10 on the rear side.

The car 1 further includes a car door rail 11b, a threshold 12b, a door motor 27, and a car door interlocking mechanism 14b. On the rear side of the car 1, similar to the front side, the car door rail 11b, the threshold 12b, and the car door interlocking mechanism 14b are installed. The car door 9b opens and closes along the car door rail 11b and the threshold 12b.

The door motor 27 may be installed above the car ceiling 15. The function of the door motor 27 is similar to that of the door motor 13 on the front side. The door motor 27 generates a driving force for opening and closing the car door 9b by a rotating motion. The car door 9b is opened and closed by the rotating motion of the door motor 27.

The car door interlocking mechanism 14b is connected to the door motor 27. The car door interlocking mechanism 14 opens and closes the car door 9b by the driving force generated by the door motor 27. The car door interlocking mechanism 14b opens and closes the car door 9b by being driven by the door motor 27.

The signal device 20 may be installed on the car door 9b. When multiple signal devices 20 are provided, the signal device 20 may be installed on both the car door 9a and the car door 9b. The signal device 20 installed on the car door 9a detects the opening and closing operations of the car door 9a, such as opening, closing, and stopping. The signal device 20 installed on the car door 9b detects the opening and closing operations of the car door 9b, such as opening, closing, and stopping.

Regarding signal B, the signal output by the signal device 20 installed on the car door 9b is referred to as signal Bb. The signal device 20 installed on the car door 9b may be installed at any position on the car door 9b, as well as on the front side. The signal device 20 installed on the car door 9b outputs signal Bb in response to the opening and closing operation of the car door 9b.

The signal device 21 may be installed on the door motor 27. Two signal devices 21 may be provided. In that case, one of the two signal devices 21 may be installed on the door motor 13. The other of the two signal devices 21 may be installed on the door motor 27. The signal device 21 installed on the door motor 13 detects the rotational movement of the door motor 13. The signal device 21 installed on the door motor 27 detects the rotational movement of the door motor 27. Regarding the signal C, the signal output by the signal device 21 installed on the door motor 27 is defined as Cb. The signal device 21 installed on the door motor 27 outputs the signal Cb corresponding to the rotational movement of the door motor 27.

The determination unit 24 determines whether or not there is an abnormality in the elevator based on the change in the signal Bb and the change in the signal Cb. The determination unit 24 may determine whether or not there is an abnormality in the opening and closing operation of the car door 9b based on the change in the signal Bb and the change in the signal Cb.

According to the sixth embodiment described above, the signal device 20 may be installed on the car door 9b on the rear side. The signal device 20 may be installed on both the car door 9a and the car door 9b. The signal device 21 may be installed on the door motor 27. Two signal devices 21 may be provided. In that case, one of the two signal devices 21 may be installed on the door motor 13. The other of the two signal devices 21 may be installed on the door motor 27. This makes it impossible to detect abnormalities in an elevator with two-way doors, including the rear side, just like the front side. Therefore, it is possible to monitor an elevator with two-way doors.

The determination unit 24 determines whether or not there is an abnormality in the elevator based on the change in signal Bb and the change in signal Cb. The determination unit 24 may also determine whether or not there is an abnormality in the opening and closing operation of the car door 9b based on the change in signal Bb and the change in signal Cb. This allows the abnormality detection system 50 to detect an elevator abnormality that occurs when the car door 9b does not open or close in conjunction with the rotational operation of the door motor 27.

As described above, the anomaly detection system and elevator system disclosed herein can be used to detect anomalies in elevators.

1 Cage, 2 Hoist, 3 Main rope, 4 Counterweight, 5 Control device, 6 Hoistway, 7 Machine room, 8 Landing, 9 Cage door, 10 Landing door, 11 Cage door rail, 12 Threshold, 13 Door motor, 14 Cage door interlocking mechanism, 15 Cage ceiling, 16 Connection, 17 Pulley, 18 Belt, 19 Signal device, 20 Signal device, 21 Signal device, 22 Abnormality detection device, 23 Receiving unit, 24 Determination unit, 25 Transmitting unit, 26 Monitoring device, 27 Door motor, 50 Abnormality detection system, 100 Processing circuit, 100a Processor, 100b Memory, 200 Hardware

Claims (9)

Equipped with a basket,
the car includes a first door motor and a first car door;
The abnormality detection system is used in an elevator in which the first car door that is opened and closed by the first door motor is installed,
a first signal device that outputs a first signal in response to an opening/closing operation of the first car door;
a second signal device for outputting a second signal in response to a rotational operation of the first door motor;
An anomaly detection device;
Equipped with
The abnormality detection device includes:
a determination unit that determines whether or not an abnormality exists in the elevator based on the change in the first signal and the change in the second signal;
A transmission unit that transmits a result determined by the determination unit to a monitoring device that monitors the elevator;
Equipped with
the elevator includes an interlocking mechanism that is driven by the first door motor to open and close the first car door,
the determination unit performs an abnormality determination for determining whether or not there is an abnormality in the interlocking mechanism based on a change in the first signal and a change in the second signal,
The determination unit, in the abnormality determination,
determining whether the first door motor is performing a rotational motion for opening or closing the first car door based on a change in the second signal;
when it is determined that the first door motor has a rotational motion for opening and closing the first car door, based on a change in the first signal, determine whether or not the first car door has an opening/closing motion linked to the rotational motion of the first door motor;
an abnormality detection system that determines that an abnormality exists in the interlocking mechanism when it is determined that the first car door does not perform an opening or closing operation in conjunction with the rotational operation of the first door motor ; A third signal device is further provided for outputting a third signal according to the traveling operation of the car,
The anomaly detection system according to claim 1 , wherein the determination unit performs the anomaly determination based on a change in the third signal, a change in the first signal, and a change in the second signal. In the abnormality determination,
The determination unit is
determining whether the car has traveled and then stopped after traveling based on a change in the third signal;
when it is determined that the car has stopped after traveling, based on a change in the second signal, determine whether or not the first door motor is performing a rotational operation for opening and closing the first car door;
when it is determined that the first door motor has a rotational motion for opening and closing the first car door, based on a change in the first signal, determine whether or not the first car door has an opening/closing motion linked to the rotational motion of the first door motor;
The abnormality detection system according to claim 2 , further comprising: a determining unit configured to determine that an abnormality exists in the interlocking mechanism when it is determined that the first car door does not perform an opening or closing operation interlocked with the rotational operation of the first door motor. The anomaly detection system according to claim 1 , wherein the first signal device is installable on a car door rail that guides the first car door. The anomaly detection system according to claim 1 , wherein the first signal device is installable under the first car door. 4. The anomaly detection system according to claim 1 , wherein a plurality of the first signal devices are provided and can be installed both under the first car door and on a car door rail that guides the first car door. The elevator further includes a second door motor;
The car is provided with a second car door that is opened and closed by the second door motor,
a fourth signal device that outputs a fourth signal corresponding to an opening/closing operation of the second car door;
a fifth signal device that outputs a fifth signal in response to a rotational operation of the second door motor;
Further comprising:
The abnormality detection system according to any one of claims 1 to 3 , wherein the determination unit determines whether or not there is an abnormality in the elevator based on the change in the fourth signal and the change in the fifth signal. The anomaly detection system according to claim 1 , wherein the anomaly detection device does not communicate with the elevator. an elevator including a car having a first car door that is opened and closed by a first door motor;
An anomaly detection system;
Equipped with
The anomaly detection system includes:
A first signaling device;
A second signaling device;
An anomaly detection device;
Equipped with
The first signal device outputs a first signal corresponding to an opening/closing operation of the first car door,
the second signal device outputs a second signal corresponding to a rotational operation of the first door motor;
The abnormality detection device includes:
a determination unit that determines whether or not an abnormality exists in the elevator based on the change in the first signal and the change in the second signal;
A transmission unit that transmits a result determined by the determination unit to a monitoring device that monitors the elevator;
Equipped with
the elevator includes an interlocking mechanism that is driven by the first door motor to open and close the first car door,
the determination unit performs an abnormality determination for determining whether or not there is an abnormality in the interlocking mechanism based on a change in the first signal and a change in the second signal,
The determination unit, in the abnormality determination,
determining whether the first door motor is performing a rotational motion for opening or closing the first car door based on a change in the second signal;
when it is determined that the first door motor has a rotational motion for opening and closing the first car door, based on a change in the first signal, determine whether or not the first car door has an opening/closing motion linked to the rotational motion of the first door motor;
the elevator system determines that there is an abnormality in the interlocking mechanism when it is determined that the first car door does not perform an opening or closing operation in conjunction with the rotational operation of the first door motor .

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