Abnormality detection system of control center

Abstract

To detect abnormal heat generation of a load controller in a storage chamber by a method different from that of a temperature sensor or an odor sensor.SOLUTION: An abnormality detection system of a control center detects abnormalities in a storage chamber in the control center having a storage chamber that contains a load controller. The abnormality detection system includes a sound generating device that generates sound inside the storage chamber, a sound detection device that detects the sound generated by the sound generating device, a gas generating member that is provided inside the storage chamber and vaporizes when the temperature inside the storage chamber reaches or exceeds a predetermined temperature to generate gas with a different specific gravity than air, a memory unit that memorizes the sound generated from the sound generating device as a normal value when no abnormality has occurred inside the storage chamber, and a detection processing unit capable of executing detection processing to detect that an abnormality has occurred inside the storage chamber when the sound generated by the sound generating device and detected by the sound detection device has changed from the normal value.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] An embodiment of the present invention relates to an anomaly detection system for a control center. [Background technology]

[0002] The control center is a closed switchboard that controls the loads to be controlled, and has the function of centrally managing the loads to be controlled, such as multiple motors. The control center houses one or multiple load controllers inside a storage room provided in a housing. The load controller, also called a control unit, is a device for controlling the loads to be controlled, and corresponds to each load.

[0003] Such load controllers may generate abnormal heat due to, for example, a short circuit, an overcurrent, etc. In this case, it is considered to provide, for example, a temperature sensor or an odor sensor in the accommodation chamber to detect changes in temperature or odor in the accommodation chamber, thereby detecting an abnormality in the load controller. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-97248 A [Patent Document 2] JP 2006-33959 A [Patent Document 3] JP 2022-75599 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in case the accuracy of the temperature sensor, odor sensor, etc. is not as desired depending on the internal or external environment of the control center, or the temperature sensor or odor sensor breaks down, it is preferable to be able to detect abnormalities using a method other than the temperature sensor, odor sensor, etc.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to provide an abnormality detection system for a control center that can detect abnormal heat generation in a load controller in a storage room using a method other than temperature sensors or odor sensors. [Means for solving the problem]

[0007] An abnormality detection system for a control center according to an embodiment is a system for detecting an abnormality in a storage room in a control center having a storage room that houses a load controller. The abnormality detection system includes a sound generating device that generates a sound in the storage room, a sound detection device that detects the sound generated by the sound generating device, a gas generating member that is provided in the storage room and vaporizes to generate a gas having a specific gravity different from air when the temperature in the storage room becomes equal to or higher than a predetermined temperature, a storage unit that stores the sound generated from the sound generating device when no abnormality occurs in the storage room as a normal value, and a detection processing unit that is capable of executing a detection process to detect the occurrence of an abnormality in the storage room when the sound generated by the sound generating device and detected by the sound detection device changes from the normal value. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a block diagram showing an electrical configuration of the abnormality detection system for a control center according to an embodiment; [Diagram 2] FIG. 1 is a schematic diagram illustrating an example in which an anomaly detection system for a control center according to an embodiment is applied to a control center. [Diagram 3] 1 is a flowchart showing an example of a calibration process in an anomaly detection system for a control center according to an embodiment. [Figure 4] 1 is a flowchart showing an example of a detection process in an anomaly detection system for a control center according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An anomaly detection system for a control center according to an embodiment will be described below with reference to the drawings. In the following description, the anomaly detection system for a control center will be simply referred to as an anomaly detection system. The anomaly detection system 10 is a system that detects an anomaly that occurs in a control center 20 as shown in FIG. 2. The control center 20 is a control center that centrally manages a plurality of loads that are to be controlled. As shown in FIG. 2, the control center 20 includes, for example, a housing 21, a storage room door 22, a wiring room door 23, and a load controller 24.

[0010] The housing 21 constitutes the outer shell of the control center 20. The housing 21 is configured as a rectangular box that is long in the vertical direction as a whole, and has a plurality of accommodation chambers 211 and a wiring chamber 212 inside. Each accommodation chamber 211 is a space for accommodating a load controller 24. Each accommodation chamber 211 is configured by dividing the space inside the housing 21 in the vertical direction, and is formed in a rectangular shape with an open front. A plurality of accommodation chambers 211, four in this case, are arranged side by side in the vertical direction of the housing 21.

[0011] The wiring chamber 212 is a space for accommodating wiring (not shown). In this case, the wiring (not shown) is, for example, electrical wiring connected to a load to be controlled. The electrical wiring connected to each load is drawn into the housing 21 from the outside, distributed to each accommodation chamber 211, and connected to the load controller 24 arranged in the accommodation chamber 211. The wiring chamber 212 is formed in a rectangular shape that is long in the vertical direction and has an open front. The wiring chamber 212 is connected to each accommodation chamber 211.

[0012] The storage chamber door 22 is a door for opening and closing the front opening of each storage chamber 211, and can be configured as, for example, a hinged door. The wiring chamber door 23 is a door for opening and closing the front opening of the wiring chamber 212, and can be configured as, for example, a hinged door.

[0013] Each load controller 24 is detachable within the accommodation chamber 211 and configured to be accommodated in each accommodation chamber 211 in the housing 21 in a vertically stacked state. For example, a different individual load is assigned to each load controller 24. Each load controller 24 has a function of controlling and protecting the assigned load. The load controller 24 can be configured to include, for example, an electromagnetic contactor, a circuit breaker, an auxiliary relay, a transformer, a current transformer, a current sensor, a terminal block, and the like. The specific circuit configuration of each load controller 24 is appropriately changed depending on the target load. The control center 20 is provided with a power supply unit (not shown) that supplies power to the load controller 24 accommodated in the accommodation chamber 211.

[0014] The abnormality detection system 10 detects a temperature abnormality in a target accommodation room 211 among the accommodation rooms 211 in the control center 20. The abnormality detection system 10 of this embodiment is applied to a control center 20 having one or more accommodation rooms 211. As shown in Figs. 1 and 2, the abnormality detection system 10 includes a sound generating device 11, a sound detecting device 12, and a gas generating member 13. In this embodiment, the four accommodation rooms 211 included in the control center 20 are subject to abnormality detection. In this case, the abnormality detection system 10 includes four sound generating devices 11 corresponding to each of the four accommodation rooms 211.

[0015] Each sound generating device 11 is provided, for example, in a corresponding accommodation chamber 211. In each accommodation chamber 211, the sound generating device 11 is provided, for example, at a position farther from the wiring chamber 212 than the load controller 24. In other words, the sound generating device 11 is provided, for example, at a position on the opposite side of the wiring chamber 212 with respect to the load controller 24.

[0016] The sound generating device 11 has a function of generating sound in the containment chamber 211 by air vibration. The sound generating device 11 can be configured, for example, as a speaker or the like that can generate voice or the like by external control. The sound generating device 11 may also be configured to generate a predetermined sound by physically vibrating the sound generating device 11 itself or a structure in the containment chamber 211 by, for example, a motor or the like.

[0017] Although each sound generating device 11 may be configured to generate sounds with the same characteristics, it is preferable to configure each sound generating device 11 to generate sounds with different characteristics. In this case, "sounds with the same characteristics" means that all of the elements that are affected by the density of the gas through which the sound is transmitted, such as the frequency, amplitude (volume), and tone of the sound, are the same. Also, "sounds with different characteristics" means that at least one of the above-mentioned frequency, amplitude (volume), and tone of the sound is different.

[0018] The sound detection device 12 has a function of detecting a sound generated by the sound generation device 11. The sound detection device 12 can be configured with a device that converts vibrations caused by sound into an electric signal, such as a sound collecting microphone. The sound detection device 12 is provided, for example, in common with the plurality of sound generation devices 11. In the case of the present embodiment, the abnormality detection system 10 includes four sound generation devices 11 and one sound detection device 12. In this case, the sound detection device 12 detects sounds generated by the four sound generation devices 11. The sound detection device 12 is provided inside the housing 21 and outside the accommodation chamber 211. The sound detection device 12 is provided, for example, in the wiring room 212.

[0019] The gas generating member 13 is provided inside each of the accommodation chambers 211 that are to be detected for abnormality. The gas generating member 13 is composed of a substance that is liquid, solid, or highly viscous fluid at room temperature and does not vaporize or vaporizes only in small amounts, and vaporizes when the temperature inside the accommodation chamber 211 reaches a predetermined temperature or higher. The gas generating member 13 generates gas with a specific gravity different from that of air by vaporization. That is, the gas generating member 13 generates gas with a specific gravity smaller or larger than that of air by vaporization. The temperature at which the gas generating member 13 vaporizes is set to a temperature at which the load controller 24 abnormally generates heat due to an overcurrent or the like, causing the temperature inside the accommodation chamber 211 to rise. That is, the temperature at which the gas generating member 13 vaporizes is set to a temperature at which the temperature inside the accommodation chamber 211 is determined to be abnormal.

[0020] The gas generating member 13 can be made of, for example, a solvent, wax, or the like. The gas generating member 13 is provided at a position closer to the wiring chamber 212 than the sound generating device 11. That is, the load controller 24 and the gas generating member 13 are located between the sound generating device 11 and the sound detecting device 12. Of the load controller 24 and the gas generating member 13, the load controller 24 is located on the sound generating device 11 side, and the gas generating member 13 is located on the sound detecting device 12 side.

[0021] Moreover, the gas generating member 13 is provided at a position where the vaporized gas can easily fill the storage chamber 211. For example, when the gas generating member 13 generates a gas that is lighter than air by vaporization, the gas generating member 13 is provided at the bottom of the storage chamber 211. For example, when the gas generating member 13 generates a gas that is heavier than air by vaporization, the gas generating member 13 is provided at the ceiling of the storage chamber 211.

[0022] 1, the abnormality detection system 10 further includes a control device 14, a calibration processing unit 15, a detection processing unit 16, and an alarm device 17. The control device 14 controls the operations of the sound generating device 11 and the sound detecting device 12. The control device 14 may be provided, for example, in a housing 21 of the control center 20, or may be provided outside the housing 21 of the control center 20. In the case of this embodiment, the control device 14 is a device provided outside the control center 20, and may be configured, for example, by a personal computer or the like. The control device 14, the sound generating device 11, and the sound detecting device 12 are connected to each other so as to be able to communicate with each other via wire or wirelessly.

[0023] The notification device 17 is a device for notifying an administrator of the control center 20, etc., of the detection of an abnormality when the detection processing unit 16 detects the abnormality. The notification device 17 can be configured, for example, with a monitor or speaker of a personal computer. The notification device 17 may be configured integrally with the control device 14, or may be configured as a separate individual.

[0024] The control device 14 is mainly composed of a microcomputer having a CPU 141 and a storage unit 142 such as a ROM, a RAM, a non-volatile memory, etc. The control device 14 does not have to be composed of a single device, but can be composed of a combination of multiple devices or multiple independent devices.

[0025] The storage unit 142 stores, for example, a computer program for realizing the anomaly detection system 10. The program stored in the storage unit 142 is executed by the CPU 141 to virtually realize the calibration processing unit 15 and the detection processing unit 16 by software. Note that the calibration processing unit 15 and the detection processing unit 16 may be realized in hardware as an integrated circuit integrated with the control device 14, or may be configured as an individual unit separate from the control device 14.

[0026] The storage unit 142 stores, for each storage chamber 211, the sound generated from the sound generating device 11 when no abnormality occurs inside the storage chamber 211 as a normal value. That is, the calibration processing unit 15 executes a calibration process in which the normal value of the detected sound corresponding to each storage chamber 211 is calibrated, i.e., corrected, before detecting an abnormality, and the calibrated normal value is stored in the storage unit 142. Note that the detected sound means the sound detected by the sound detection device 12. In this case, the calibration processing unit 15 generates sounds for the multiple sound generating devices 11 in different periods, i.e., non-overlapping periods, and stores the sounds as normal values.

[0027] Specifically, the calibration processing unit 15 executes the calibration process shown in Fig. 3 as the calibration of the normal value. It is assumed that the calibration process is executed when no abnormality occurs in the control center 20 and the temperature in each accommodation chamber 211 is within the normal range. In Fig. 3, the variables n and m are positive integers. The variable n means the number of accommodation chambers 211 that are the target from the top or bottom of the control center 20. In addition, the variable m means the number of accommodation chambers 211 that are the target. In this embodiment, the accommodation chambers 211 in the control center 20 are in four levels, so the variable m = 4.

[0028] 3, the calibration processing unit 15 first initializes the variable n by setting the variable n=0 in step S11. Next, the calibration processing unit 15 sets the variable n=n+1 in step S12. Next, the calibration processing unit 15 determines whether the variable n≦variable m in step S13, that is, determines whether the calibration has been completed for all the storage chambers 211. If the variable n is equal to or less than the variable m in step S13 (YES), the calibration processing unit 15 shifts the process to step S14.

[0029] Next, the calibration processing unit 15 operates the sound generating device 11 of the nth stage to generate sound in step S14, and operates the sound detection device 12 to detect the sound generated by the sound generating device 11 in step S15. Then, the calibration processing unit 15 stores the sound detected in step S15 in the memory unit 142 as a normal value for the nth stage storage chamber 211. Thereafter, the calibration processing unit 15 returns the process to step S12, and repeats the processes of steps S12 to S16. Then, if the variable n exceeds the variable m in step S13 (NO), the calibration processing unit 15 determines that the calibration has been completed for all storage chambers 211, and ends the series of processes (END).

[0030] While the control center 20 is operating, the detection processing unit 16 executes the abnormality detection process shown in Fig. 4 to detect an abnormality in the control center 20. Note that the variables n and m in the abnormality detection process in Fig. 4 are set in the same way as the variables n and m in the calibration process in Fig. 3.

[0031] 4, the detection processing unit 16 first initializes the variable n by setting the variable n to 0 in step S21. Next, the detection processing unit 16 sets the variable n to n+1 in step S22. Next, the detection processing unit 16 determines whether the variable n is equal to or less than the variable m in step S23, that is, determines whether detection has been completed for all the storage chambers 211. If the variable n is equal to or less than the variable m in step S23 (YES), the detection processing unit 16 transitions the process to step S24.

[0032] Thereafter, in step S24, the detection processing unit 16 operates the n-th stage sound generating device 11 to generate sound, and in step S25, operates the sound detection device 12 to detect the sound generated by the sound generating device 11. Next, the detection processing unit 16 compares the detected sound detected in step S25 with the normal value stored in FIG.

[0033] Here, when abnormal heat is generated in the load controller 24 accommodated in the nth accommodation chamber 211 and the temperature inside the nth accommodation chamber 211 rises, gas is generated from the gas generating member 13 installed in the nth accommodation chamber 211 in accordance with the temperature rise. Then, the density of the gas filling the nth accommodation chamber 211 changes from the normal value state, that is, the state before gas is generated from the gas generating member 13. As a result, the characteristics of the sound detected by the sound detection device 12 change from the normal value.

[0034] Therefore, when the detected sound does not change by a predetermined amount or more from the normal value (NO in step S26), the detection processing unit 16 determines that no abnormality has occurred in the targeted n-th storage chamber 211, and returns the process to step S22. Then, steps S22 and after are executed, and the detection target is moved to the storage chamber 211 in the next stage.

[0035] On the other hand, if the detected sound has changed by a predetermined amount or more from the normal value (YES in step S26), the detection processing unit 16 shifts the process to step S27 and determines that an abnormality has occurred in the targeted nth storage chamber 211. Then, the detection processing unit 16 shifts the process to step S28 and operates the alarm device 17 to notify the manager of the occurrence of the abnormality, and then ends the series of processes (END).

[0036] According to the embodiment described above, the abnormality detection system 10 is a system for detecting an abnormality in an accommodation room 211 in a control center 20 having the accommodation room 211 that accommodates a load controller 24. The abnormality detection system 10 includes a sound generating device 11, a sound detection device 12, a gas generating member 13, a memory unit 142, and a detection processing unit 16.

[0037] The sound generating device 11 has a function of generating a sound inside the storage chamber 211. The sound detection device 12 has a function of detecting a sound generated by the sound generating device 11. The gas generating member 13 is provided inside the storage chamber 211 and has a function of vaporizing to generate a gas having a specific gravity different from that of air when the temperature inside the storage chamber 211 reaches a predetermined temperature or higher. The storage unit 142 has a function of storing the sound generated from the sound generating device 11 in a state where no abnormality occurs inside the storage chamber 211 as a normal value. The detection processing unit 16 is capable of executing a detection process of detecting that an abnormality has occurred inside the storage chamber 211 when the sound generated by the sound generating device 11 and detected by the sound detection device 12 has changed from the normal value.

[0038] According to this, the abnormality detection system 10 according to the present embodiment can detect a temperature rise in each accommodation room 211, i.e., abnormal heat generation of the load controller 24, by detecting a change in sound generated from the sound generating device 11 with the sound detection device 12. Therefore, according to this, abnormal heat generation of the load controller 24 in the accommodation room 211, i.e., an abnormality in the control center 20, can be detected by a method different from that using a temperature sensor or an odor sensor, i.e., by a change in sound.

[0039] The abnormality detection system 10 is applied to a control center 20 having a plurality of accommodation rooms 211. In this case, a plurality of sound generating devices 11 are provided corresponding to the plurality of accommodation rooms 211. The sound detection device 12 is provided in common to the plurality of sound generating devices 11. That is, the number of sound detection devices 12 is smaller than the number of sound generating devices 11.

[0040] According to this, it is possible to reduce the number of sound detection devices 12 because there is no need to provide a sound detection device 12 for each of the multiple accommodation chambers 211. Therefore, the number of parts related to the sound detection devices 12 can be reduced, and thus the manufacturing cost of the control center 20 can be reduced.

[0041] Furthermore, the multiple sound generating devices 11 can generate sounds with different characteristics. Since the sound characteristics differ for each storage chamber 211, it becomes easier to distinguish the storage chambers 211 from the sounds detected by the sound detection device 12. Therefore, when there are multiple storage chambers 211, it becomes easier to identify the storage chamber 211 in which an abnormality has occurred.

[0042] Furthermore, the detection processing unit 16 operates the multiple sound generating devices 11 for different periods during the detection process. This also makes it easier to distinguish the storage rooms 211 from the sound detected by the sound detection device 12, and as a result, when there are multiple storage rooms 211, it becomes easier to identify the storage room 211 in which an abnormality has occurred.

[0043] In the above embodiment, the configuration is such that the storage chamber 211 in which the abnormality has occurred can be identified by the abnormality detection process. However, even if there are multiple storage chambers 211, if there is no need to identify the storage chamber 211 in which the abnormality has occurred, a configuration in which, for example, each sound generating device 11 is operated simultaneously may be used.

[0044] Although the present disclosure has been described based on the embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and forms, and other combinations and forms including only one element, more than one element, or less than one element, are also within the scope and concept of the present disclosure. [Explanation of symbols]

[0045] 10: Anomaly detection system, 11: Sound generating device, 12: Sound detection device, 13: Gas generating member, 16: Detection processing unit, 20: Control center, 24: Load controller, 142: Memory unit, 211: Storage chamber

Claims

1. A system for detecting an abnormality in a room in a control center that houses a load controller, comprising: A sound generating device that generates sound inside the storage chamber; a sound detection device that detects the sound generated by the sound generation device; a gas generating member that is provided inside the storage chamber and that vaporizes when the temperature inside the storage chamber reaches or exceeds a predetermined temperature to generate a gas having a specific gravity different from that of air; a storage unit that stores a sound generated from the sound generating device when no abnormality occurs inside the accommodation chamber as a normal value; a detection processing unit capable of executing a detection process for detecting an occurrence of an abnormality inside the accommodation chamber when the sound generated by the sound generating device and detected by the sound detecting device changes from the normal value; and An abnormality detection system for a control center comprising:

2. The present invention is applied to a control center having a plurality of the storage rooms, a plurality of the sound generating devices are provided corresponding to the plurality of storage chambers, The sound detection device is provided in common to the plurality of sound generation devices. The control center anomaly detection system according to claim 1 , comprising:

3. The plurality of sound generating devices each generate sounds with different characteristics.

3. The control center anomaly detection system according to claim 2.

4. The detection processing unit operates the plurality of sound generating devices for different periods during the detection process.

3. The control center anomaly detection system according to claim 2.

Images