JP2021195201A - Abnormal heating monitoring system of elevator - Google Patents

Abstract

To detect abnormal heating at a power transmission unit in an elevator supplying power to a car by non-contact from the power transmission unit provided in a hoistway.SOLUTION: An abnormal heating monitoring system monitors abnormal heating at a power transmission unit provided in a hoistway in an elevator supplying power to a car by non-contact from the power transmission unit. The abnormal heating monitoring system includes a temperature detection device for detecting a temperature of the power transmission unit and a determination processing unit for determining whether or not a temperature (detected temperature) detected by the temperature detection device is equal to or more than a threshold.SELECTED DRAWING: Figure 2

Description

The present invention relates to a technique applicable to an elevator that supplies power to a car in a non-contact manner.

As a non-contact power supply type elevator that supplies power to the car in a non-contact manner, a power transmission section that generates a magnetic field for feeding is provided in the hoistway, and the power transmission section is connected to the car by magnetic field coupling (electromagnetic induction or magnetic field resonance). It has been proposed to supply power. As an example, Patent Document 1 discloses a system in which a power transmission coil (power transmission unit) is provided on a stop floor of a car, and power is supplied from the power transmission coil when the car stops on the stop floor. As another example, Patent Document 2 discloses a conductor wire (power transmission unit) laid in a hoistway to supply power to a car from the conductor wire.

Jikkenhei 4-84261 Gazette Japanese Unexamined Patent Publication No. 2001-310879

As described above, in an elevator that supplies power from the power transmission unit to the car by magnetic field coupling, metal powder generated during installation of the elevator may adhere to the power transmission unit. In addition, when the elevator is in operation, metal products (accessories, etc.) dropped by the user may fall into the hoistway through the gap between the car and the landing, and may be caught in the power transmission section. When metal foreign matter such as metal powder or metal products adheres to the power transmission unit in this way, an induced current is generated in the metal foreign matter by the magnetic field for power supply, which causes the metal foreign matter to generate heat. If such heat generation of the metal foreign matter (abnormal heat generation in the power transmission unit) is left unattended, the temperature of the metal foreign matter rises, which may cause damage to the power transmission unit.

Therefore, an object of the present invention is to detect abnormal heat generation in the power transmission unit in an elevator that supplies power to the car in a non-contact manner from the power transmission unit provided in the hoistway.

The abnormal heat generation monitoring system according to the present invention is a system for monitoring abnormal heat generation in the power transmission unit in an elevator that supplies power to the car in a non-contact manner from the power transmission unit provided in the hoistway, and controls the temperature of the power transmission unit. It includes a temperature detection device for detection and a determination processing unit for determining whether or not the temperature (detection temperature) detected by the temperature detection device is equal to or higher than the threshold value.

According to the above-mentioned abnormal heat generation monitoring system, the threshold value is a temperature higher than the normal temperature of the power transmission unit at the time of power supply when there is no adhesion of metal foreign matter that causes abnormal heat generation, and is usually set as the temperature of the power transmission unit. By setting the temperature to be unreachable (that is, the temperature recognized as abnormal), the judgment processing unit determines that the temperature detected by the temperature detection device is equal to or higher than the threshold value, and the power transmission unit at that time determines. It becomes possible to detect the heat generated by the power transmission unit as abnormal heat generated in the power transmission unit.

In the above-mentioned abnormal heat generation monitoring system, the power transmission unit may be a conductor wire hung in the hoistway, and the temperature detection device is provided in the car and scans with the movement of the car. It may be the one that detects the temperature of the conductor wire by. According to this configuration, the temperature of the conductor wire can be continuously detected along the conductor wire. Therefore, it becomes possible to detect abnormal heat generation in the conductor wire without omission in the scanning range of the temperature detection device.

The abnormal heat generation monitoring system may further include a cutoff processing unit. Here, the cutoff processing unit cuts off the power supply to the car when it is determined by the judgment processing unit that the threshold value is equal to or higher than the threshold value. According to this configuration, since the power supply to the power transmission unit is cut off, the induced current is not generated in the metal foreign matter that causes the abnormal heat generation in the power transmission unit, and as a result, the abnormal heat generation in the power transmission unit is suppressed. Will be done.

The abnormal heat generation monitoring system may further include a storage processing unit. Here, when the determination processing unit determines that the value is equal to or higher than the threshold value, the storage processing unit stores the position of the car at that time as the position where the abnormal heat generation occurs. According to this configuration, it is possible to identify the position where the abnormal heat generation occurs (that is, the position where the metal foreign substance which is the cause of the abnormal heat generation is attached) by referring to the stored position of the car. Become. Therefore, it becomes easy to find a metal foreign substance at the time of maintenance and inspection.

According to the present invention, it becomes possible to detect abnormal heat generation in the power transmission unit.

It is a conceptual diagram which illustrates the elevator of the non-contact power supply system. It is a conceptual diagram which showed the abnormal heat generation monitoring system which concerns on embodiment. It is a flowchart which showed the processing content of the various processing part in an embodiment. It is a conceptual diagram which showed the abnormal heat generation monitoring system which concerns on the 1st modification. It is a flowchart which showed the processing content of the various processing part in the 1st modification. It is a conceptual diagram which showed the abnormal heat generation monitoring system which concerns on the 2nd modification.

[1] Embodiment FIG. 1 is a conceptual diagram illustrating an elevator of a non-contact power feeding system. As shown in FIG. 1, the elevator includes a hoisting machine 100, a car car control device 101, and an elevator control device 102. Further, the non-contact power feeding type elevator in the present embodiment always uses magnetic field coupling (electromagnetic induction, magnetic field resonance, etc.) to supply power to the car K, and is a conductor arranged in the hoistway. It includes a wire 1, a power receiving coil 2 provided in the car K, and a power supply device 3 for supplying electric power to the conductor wire 1.

The hoisting machine 100 is a device for hoisting a main rope R for suspending a car K. In the present embodiment, a sheave 100A on which the main rope R is hung, an electric motor 100B for rotating the sheave 100A, and a hoisting machine 100 are used. It is composed of a rotation amount detecting device 100C (for example, an encoder or the like) for detecting the rotation amount of the machine 100. The car control device 101 controls various operations (opening and closing of the car door, etc.) in the car K. The elevator control device 102 controls the raising and lowering operation of the car K based on the output value Dr (rotation amount of the hoisting machine 100) of the rotation amount detection device 100C, and starts supplying electric power from the power supply device 3 to the conductor wire 1. And control of shutoff.

The conductor wire 1 functions as a power transmission unit that generates a magnetic field for power supply (alternating magnetic field), and an alternating current flows through the conductor wire 1 by power supply from the power supply device 3 to surround the conductor wire 1. Generates a magnetic field for power supply. The power receiving coil 2 is a coil that receives electric power from the conductor wire 1 by magnetic field coupling. In the example of FIG. 1, the conductor wire 1 is arranged in a U-shaped hanging downward in the hoistway, and the power receiving coil 2 faces the conductor wire 1 on the top surface of the car K. It is provided at the position. Then, the conductor wire 1 has the conductor wire 1 and the power receiving coil 2 in the entire range of motion of the power receiving coil 2 moving together with the car K (that is, no matter where the car K is located in the hoistway). It reaches from the top floor to the bottom floor so that the magnetic field coupled state (that is, the state in which the power receiving coil 2 faces the conductor wire 1) can be maintained.

The method of wiring the conductor wire 1 into the hoistway can generate a magnetic field for feeding power, and the conductor wire 1 and the power receiving coil 2 can be generated in all or a part of the range of motion of the power receiving coil 2. As long as the conductor wire 1 can be maintained in a magnetic field-coupled state, the method is not limited to the method of hanging the conductor wire 1 in a U shape, and may be appropriately changed to various other methods. Further, the installation position of the power receiving coil 2 is not limited to the top surface of the car K, but is appropriately changed to various other positions (side surface, bottom surface, etc. of the car K) capable of magnetic field coupling with the conductor wire 1. May be good.

According to such an elevator, as long as alternating current flows through the conductor wire 1 and a magnetic field for feeding (alternating magnetic field) continues to be generated, when the power receiving coil 2 faces the conductor wire 1 (this implementation). In the form, regardless of the position of the car K in the hoistway), whether the car K is stopped or moving, magnetic field coupling is applied from the conductor wire 1 to the car K. Power is supplied.

On the other hand, in the elevator that supplies power from the conductor wire 1 to the car K in this way, metal powder generated during the installation of the elevator may adhere to the conductor wire 1. Further, when the elevator is in operation, a metal product (accessory or the like) dropped by the user may fall into the hoistway through a gap between the car K and the landing and be caught by the conductor wire 1. When a metal foreign substance such as metal powder or a metal product adheres to the conductor wire 1 in this way, an induced current is generated in the metal foreign substance by the magnetic field for power supply, which causes the metal foreign substance to generate heat. If such heat generation of the metal foreign matter (abnormal heat generation in the conductor wire 1) is left unattended, the temperature of the metal foreign matter rises. In particular, in the present embodiment, alternating current always flows through the conductor wire 1 to generate a magnetic field for feeding (alternating magnetic field). Therefore, if a metallic foreign substance adheres to the conductor wire 1, the metallic foreign substance continues to generate heat. And the temperature tends to rise. Then, when the temperature of the metal foreign matter rises, the conductor wire 1 may be damaged due to the temperature rise. For example, the insulating film covering the metal portion of the conductor wire 1 is likely to melt and the metal portion is exposed.

Therefore, in the elevator of the present embodiment, an abnormal heat generation monitoring system for monitoring abnormal heat generation in the conductor wire 1 as described above is constructed. The details of the abnormal heat generation monitoring system will be described below.

FIG. 2 is a conceptual diagram showing an abnormal heat generation monitoring system 5 according to the present embodiment. The abnormal heat generation monitoring system 5 includes a temperature detection device 50A, a determination processing unit 51A, and a cutoff processing unit 52.

The temperature detection device 50A is a device capable of non-contact temperature detection. The temperature detection device 50A is provided in the car K so that the conductor wire 1 is the target of temperature detection. In the present embodiment, the infrared camera 501 and the infrared processing device 502 are provided in the car K, and the image processing unit 503 is configured in the infrared processing device 502. Here, the image processing unit 503 is a processing unit that acquires the temperature of the image shooting target by performing signal processing on the image captured by the infrared camera 501. Then, the temperature detection device 50A is configured by the infrared camera 501 and the image processing unit 503, and the infrared camera 501 is installed in the car K with the infrared camera 501 facing the conductor wire 1. More specifically, the infrared camera 501 has one of the two hanging portions so that the temperature of the two hanging portions formed by hanging the conductor wire 1 in a U shape can be simultaneously detected. It is installed in the car K so that it fits on one screen.

According to the installation of the temperature detection device 50A in the car K, the temperature detection device 50A moves along the conductor wire 1 together with the car K and corresponds to the position of the car K in the conductor wire 1. It becomes possible to detect the temperature of the part that has been removed. That is, the temperature detecting device 50A can detect the temperature of the conductor wire 1 by scanning with the movement of the car K. Therefore, it becomes possible to continuously detect the temperature of the conductor wire 1 along the conductor wire 1, and as a result, the abnormal heat generation in the conductor wire 1 is detected without omission in the scanning range of the temperature detection device 50A. It will be possible to do. The temperature detection device 50A is not limited to the one using the infrared camera 501 as long as it can detect the temperature in a non-contact manner, and may be appropriately changed to various other devices.

The determination processing unit 51A and the cutoff processing unit 52 are various processing units for realizing processing for monitoring abnormal heat generation in the conductor wire 1 (abnormal heat generation monitoring processing). In the present embodiment, the determination processing unit 51A is configured in the infrared processing device 502, and the blocking processing unit 52 is configured in the elevator control device 102. Here, these processing units may be configured by hardware by constructing circuits in various devices, or execute a program in a processing device such as a CPU (Central Processing Unit) or a microcomputer provided in the various devices. It may be configured by software. Then, such a program may be stored in a portable storage medium (for example, a flash memory or the like), or may be stored in a server or the like for downloadability.

Hereinafter, the processing contents of various processing units in the abnormal heat generation monitoring processing will be specifically described. Note that FIG. 3 is a flowchart showing the processing contents of the various processing units in the present embodiment.

The abnormal heat generation monitoring process is started, for example, when the elevator shifts from the standby state to the operating state. When the abnormal heat generation monitoring process is started, the determination processing unit 51A determines whether or not the temperature detected by the temperature detection device 50A (hereinafter referred to as “detection temperature Ta”) is equal to or higher than the threshold value Th (step). S11). Here, the threshold value Th is a temperature higher than the normal temperature of the conductor wire 1 at the time of feeding when there is no adhesion of metal foreign matter, and is a temperature that normally does not reach as the temperature of the conductor wire 1 (that is, that is, the temperature is not reached. It is set to a temperature that is recognized as abnormal). Further, the threshold value Th is preferably set to a temperature lower than the temperature at which the conductor wire 1 begins to be adversely affected so that abnormal heat generation can be detected before the conductor wire 1 is adversely affected.

According to such a threshold value Th, when the determination processing unit 51A determines in step S11 that "it is equal to or higher than the threshold value Th (Yes)", it is determined that abnormal heat generation is generated in the conductor wire 1 based on the determination. can do. That is, the determination processing unit 51A detects the heat generation in the conductor wire 1 at that time as the abnormal heat generation generated in the conductor wire 1 based on the determination in step S11 that “it is equal to or higher than the threshold value (Yes)”. Will be possible.

Then, when the determination processing unit 51A determines in step S11 that "it is equal to or higher than the threshold value (Yes)", the determination processing unit 51A generates an abnormal signal Sa, and the abnormal signal Sa is cut off by the cutoff processing unit 52 (elevator in this embodiment). It is transmitted to the control device 102) (step S12). As a result, it is transmitted to the cutoff processing unit 52 that abnormal heat generation is generated in the conductor wire 1.

In parallel with the processing of the determination processing unit 51A, the cutoff processing unit 52 determines whether or not the abnormality signal Sa has been received when the abnormal heat generation monitoring process is started (step S21). Further, the cutoff processing unit 52 repeatedly executes the step S21 until it can be determined in step S21 that "received (Yes)". Then, when the cutoff processing unit 52 determines in step S21 that "received (Yes)", the cutoff processing unit 52 cuts off the power supply to the car K by cutting off the power supply from the power supply device 3 to the conductor wire 1. (Step S22). That is, the cutoff processing unit 52 cuts off the power supply to the car K when it is determined by the judgment processing unit 51A that "it is equal to or higher than the threshold value (Yes)".

According to such a cutoff process, the power supply to the conductor wire 1 is cut off, so that an induced current is not generated in the metal foreign matter that causes abnormal heat generation in the conductor wire 1, and as a result, the conductor wire 1 Abnormal heat generation is suppressed. Further, as described above, by setting the threshold value Th to a temperature lower than the temperature at which the conductor wire 1 begins to be adversely affected, it is possible to detect and suppress abnormal heat generation before the conductor wire 1 is adversely affected. become.

On the other hand, if the power supply to the car K is cut off, the car door cannot be opened due to insufficient power, which may cause a situation in which the user is trapped in the car K. Therefore, in order to prevent the user from being confined in the car K, when the judgment processing unit 51A determines that "the threshold is Th or more (Yes)", the above-mentioned abnormal signal Sa is used as the car control device. By transmitting to 101 and the elevator control device 102, an emergency stop of the car K to the nearest floor is executed by the control of the elevator control device 102, and after the emergency stop is completed, the car door is controlled by the car control device 101. It is preferable to open. With such control, it is possible to get off from the car K, and it is possible to prevent the user from being confined in the car K.

In the above-mentioned abnormal heat generation monitoring system 5, the determination processing unit 51A is not limited to the case where it is configured in the infrared processing device 502, but may be configured in the car control device 101 or in the elevator control device 102. It may be configured in.

[2] Modification Example [2-1] First Modification Example FIG. 4 is a conceptual diagram showing an abnormal heat generation monitoring system 5 according to the first modification. Further, FIG. 5 is a flowchart showing the processing contents of the various processing units in the first modification. As shown in FIG. 4, the abnormal heat generation monitoring system 5 may include a storage processing unit 53. Here, when the storage processing unit 53 determines that the determination processing unit 51A "is equal to or greater than the threshold value (Yes)" (step S11), abnormal heat generation occurs at the position of the car K at that time. It is a processing unit that stores as a position. In the present embodiment, the storage processing unit 53 is configured in the elevator control device 102.

Specifically, by transmitting the abnormality signal Sa (step S12) to the storage processing unit 53 (see FIG. 5), it is also transmitted to the storage processing unit 53 that abnormal heat generation is occurring in the conductor wire 1. To. Then, the storage processing unit 53 determines whether or not the abnormality signal Sa has been received by itself in parallel with the processing of the determination processing unit 51A and the cutoff processing unit 52 (step S31). Further, the storage processing unit 53 repeatedly executes the step S31 until it can be determined in step S31 that "received (Yes)".

When the storage processing unit 53 determines in step S31 that "received (Yes)", the storage unit 53 acquires the position of the car K at that time, and sets the position as the position where abnormal heat generation occurs. Store in (shown) (step S32). As an example, the storage processing unit 53 calculates and acquires the position of the car K from the output value Dr (rotation amount of the hoisting machine 100) of the rotation amount detection device 100C (see FIG. 1).

According to such a storage process, it is possible to identify the position where the abnormal heat generation occurs (that is, the position where the metal foreign matter is attached) by referring to the position of the stored car K. Therefore, it becomes easy to find a metal foreign substance at the time of maintenance and inspection.

[2-2] Second Modified Example FIG. 6 is a conceptual diagram showing an abnormal heat generation monitoring system 5 according to the second modified example. As shown in FIG. 6, the conductor wire 1 has a portion 10p below the temperature detection device 50A when the car K is stopped on the lowest floor, and a portion 10p when the car K is stopped on the top floor. A portion that cannot be scanned by the temperature detection device 50A, such as a portion 10q above the temperature detection device 50A, may occur. Therefore, the abnormal heat generation monitoring system 5 may have the following configuration.

The abnormal heat generation monitoring system 5 includes another temperature detecting device 50B for detecting the temperature of the portion of the conductor wire 1 that cannot be scanned by the temperature detecting device 50A, and the temperature detected by the temperature detecting device 50B (hereinafter, "" A determination processing unit 51B for determining whether or not the detection temperature Tb) is equal to or higher than the threshold value Th is provided. In the example of FIG. 6, the temperature detection device 50B has the same configuration as the temperature detection device 50A (infrared camera 501 and image processing unit 503), and the determination processing unit 51B is installed for the temperature detection device 50B. It is configured in the infrared processing device 502. Further, one temperature detection device 50B is installed in the hoistway corresponding to the lower portion 10p and the upper portion 10q of the conductor wire 1, respectively.

Then, when the determination processing unit 51B determines that "it is equal to or higher than the threshold value (Yes)", the abnormality signal Sb is generated, and the abnormality signal Sb is cut off by the cutoff processing unit 52 (in this modification, the elevator control device 102). ). Then, when the cutoff processing unit 52 receives the abnormal signal Sb, the cutoff processing unit 52 cuts off the power supply to the car K by cutting off the power supply from the power supply device 3 to the conductor wire 1.

According to such an abnormal heat generation monitoring system 5, even if a portion that cannot be scanned by the temperature detection device 50A occurs in the conductor wire 1, a wide range (preferably) of the conductor wire 1 is provided by providing another temperature detection device 50B. Will be able to monitor the entire area).

The temperature detection device 50B is not limited to the case where two are provided in the hoistway, and one or three or more may be provided depending on the position and number of portions that cannot be scanned by the temperature detection device 50A. Further, the temperature detection device 50B is not limited to the case where it is installed in the hoistway, and may be provided in the car K as in the temperature detection device 50A. As an example, the temperature detection device 50A can be provided on the top surface of the car K, and the temperature detection device 50B can be provided on the bottom surface of the car K. Even with such a configuration, it becomes possible to monitor a wide range of the conductor wire 1. Further, the determination processing unit 51B is not limited to the case where it is configured in the infrared processing device 502, but may be configured in the elevator control device 102.

[2-3] Other variants The elevator is not limited to the one that constantly supplies power to the car K by magnetic field coupling with the conductor wire 1, but to the car K only when the elevator is stopped on each floor. There is something that supplies power. In such an elevator, a power transmission coil is provided on each floor as a power transmission unit that generates a magnetic field for power supply (alternating magnetic field), and the power transmission coil faces the power reception coil 2 when the car K to each floor is stopped. It is arranged to do. The above-mentioned abnormal heat generation monitoring system 5 can also be applied to a non-contact power supply type elevator that supplies power to the car K only when the elevator is stopped on each floor. Specifically, when the temperature detection device 50A is provided in the car K so that the power transmission coil on that floor is the target of temperature detection when the car K on each floor is stopped, abnormal heat generation in the power transmission coil is generated. It will be possible to monitor.

The description of the embodiments and modifications described above should be considered exemplary in all respects and not restrictive. The scope of the invention is shown by the claims, not by the embodiments or modifications described above. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope of the claims.

1 Conductor wire 2 Power receiving coil 3 Power supply device 5 Abnormal heat generation monitoring system K Riding car R Main rope 10p, 10q Part 50A, 50B Temperature detection device 51A, 51B Judgment processing unit 52 Blocking processing unit 53 Storage processing unit Dr Output value Sa, Sb Abnormal signal Ta, Tb Detection temperature Th Threshold 100 Hoisting machine 100A Roller 100B Electric motor 100C Rotation amount detection device 101 Vehicle control device 102 Elevator control device 501 Infrared camera 502 Infrared processing device 503 Image processing unit

Claims (4)

It is an abnormal heat generation monitoring system that monitors abnormal heat generation in the power transmission unit in an elevator that supplies power to the car in a non-contact manner from the power transmission unit provided in the hoistway.
A temperature detection device that detects the temperature of the power transmission unit, and
A determination processing unit that determines whether or not the temperature detected by the temperature detection device is equal to or higher than the threshold value.
Elevator abnormal heat generation monitoring system. The power transmission unit is a conductor wire that is hung in the hoistway.
The abnormal heat generation monitoring system for an elevator according to claim 1, wherein the temperature detecting device is provided in the car and detects the temperature of the conductor wire by scanning with the movement of the car. The abnormal heat generation monitoring system for an elevator according to claim 1 or 2, further comprising a cutoff processing unit that cuts off the power supply to the car when the determination processing unit determines that the threshold value is equal to or higher than the threshold value. Claims 1 to 3 further include a storage processing unit that stores the position of the car at that time as the position where the abnormal heat generation occurs when the determination processing unit determines that the threshold value or higher is reached. Elevator abnormal heat generation monitoring system described in any of them.

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