KR102533476B1 - Bus duct system - Google Patents

Abstract

One embodiment is a bus duct for transmitting power; And a temperature sensing device including a temperature sensor for measuring the temperature of the booth duct, wherein the temperature sensor is disposed outside the booth duct to detect the temperature of the booth duct, and according to the detected temperature An optical fiber cable for transmitting a signal having a fluctuating frequency through an optical fiber; a plurality of connectors coupled to both ends of the optical fiber cable; And it is possible to provide a booth duct system including an adapter that extends the optical fiber cable by coupling a connector coupled to one end of the optical fiber cable and a connector coupled to one end of the other optical fiber cable.

Description

Bus duct system {BUS DUCT SYSTEM}

The present invention relates to a booth duct system including a temperature sensing device for sensing the temperature of a booth duct.

A wiring method using a cable is common as a wiring method for transmitting power, but a wiring method using a bus duct having a bus bar is adopted in a high-rise building or a large-scale factory. The bus duct has the advantages of being able to transmit power through a conductor inside a large amount of current, being able to expand and relocate, being easy to deal with when an accident occurs, and being easy to manage the system.

On the other hand, a thermal monitoring device is required for the bus duct. This is because the load increases as power flows through the bus duct and heat may occur inside the bus duct. Heat from the bus duct can lead to fire. Since the bus duct is extended and installed to the destination of power, temperature sensing is required for the path where the bus duct is installed. There is a method of installing temperature sensors at several points on the bus duct route, but this discontinuous temperature measurement method may have a problem that the temperature sensors cannot be detected at locations other than the installation point. So, a distributed temperature sensor (DTS) that continuously measures the temperature along the bus duct path can be used. The distribution type temperature sensor includes an optical fiber cable installed in the booth duct, and can detect the temperature change of the booth duct using an optical signal transmitted through the optical fiber cable.

Conventionally, a distributed temperature sensor uses a Raman scattering method, but may have the following disadvantages. Since the Raman scattering-based distributed temperature sensor uses an optical fiber cable supporting multimode, it may not be compatible with a device or system using an optical fiber cable supporting single mode. In addition, a Raman scattering-based distributed temperature sensor can be sensitive to bending loss and coupling loss of an optical fiber cable, because the temperature value is read through the 'strength' of the scattered (light) signal. If the signal strength increases, the stimulated scattering signal is generated and the temperature value cannot be read. Therefore, the signal strength cannot be increased to compensate for this loss.

In addition, the Raman scattering-based distributed temperature sensor has many limitations when installed in a bus duct. This limitation mainly stems from its loss-sensitive nature. Specifically, if an optical fiber cable is fastened through a connector to install a temperature sensor in a booth duct, the amount of installation work for the booth duct can be significantly reduced. However, since the Raman scattering-based distributed temperature sensor is sensitive to signal strength, a connector can hardly be used. In addition, since it is important to lay the optical fiber cable close to the sensing part in order to make the temperature sensing of the bus duct more successful, it is sometimes necessary to bend it and install it in the bus duct. However, distributed temperature sensors based on Raman scattering can be difficult to deploy in bending because they are sensitive to bending losses. Since the temperature sensor placement is subject to restrictions, the booth duct placement may also be equally limited.

In this regard, the present embodiment is intended to provide a booth duct system including a temperature sensor that supports a single mode, is insensitive to bending loss and fastening loss, and enables the use or bending arrangement of a connector.

Against this background, one object of the present embodiment is to provide a bus duct system that measures temperature by analyzing the frequency of a signal transmitted through an optical fiber cable—for example, using a stimulated Brillouin scattering method.

Another object of the present embodiment is to provide a bus duct system for connecting a plurality of optical fiber cables to each other using connectors and adapters.

Another object of this embodiment is to provide a booth duct system in which optical fiber cables are laid in a straight line at the top and bottom of the booth duct and in a circular shape at a point where a plurality of booth duct modules are connected.

In order to achieve the above object, one embodiment, a bus duct for transmitting power; And a temperature sensing device including a temperature sensor for measuring the temperature of the booth duct, wherein the temperature sensor is disposed outside the booth duct to detect the temperature of the booth duct, and according to the detected temperature An optical fiber cable for transmitting a signal having a fluctuating frequency through an optical fiber; a plurality of connectors coupled to both ends of the optical fiber cable; and an adapter that extends the optical fiber cable by coupling a connector coupled to one end of the optical fiber cable and a connector coupled to one end of the other optical fiber cable.

In the system, the temperature sensing device may use a guided Brillouin scattering method including brillouin optical time domain analysis (BOTDA) or brillouin optical correlation domain analysis (BOCDA).

In the system, the booth duct includes a plurality of booth duct modules including a conductor through which current flows and an enclosure that surrounds the conductor and insulates the conductor from the outside, and a connection module connecting the plurality of booth duct modules, and the temperature sensor may be arranged in a straight line in the plurality of booth duct modules, and may be arranged in a circular shape in the connection module.

In the above system, the booth duct includes a booth duct module including a conductor through which current flows and an enclosure that surrounds the conductor and insulates the conductor from the outside, and includes the conductor and the enclosure but is integrally formed with the enclosure and is integrally formed with the booth duct module and a connection booth duct module further including a connection portion coupled with a conductor of the booth duct module, and the temperature sensor may be disposed in a straight line in the enclosure of the booth duct module and wound in a circular shape in the connection portion.

In the system, the temperature sensing device includes a temperature realization unit that analyzes the signal and generates a temperature value for the booth duct, and the temperature sensor performs first temperature sensing on the upper and lower surfaces of the booth duct. line and a second temperature sensing line, respectively, and the first and second temperature sensing lines are formed in the form of an extended optical fiber cable by coupling the optical fiber cable, the plurality of connectors, and the adapter to each other, and realizes the temperature The bus ducts may start individually at the end and be connected to each other at the point where the bus duct ends to form a loop.

In the system, the temperature sensing device uses an stimulated Brillouin scattering method including BOTDA or BOCDA, and the temperature realization unit makes a first light incident through the first temperature sensing line, and the second temperature sensing A second light independent of the first light may be incident through the line.

In the system, the temperature sensor forms a first temperature sensing line and a second temperature sensing line on the upper and lower surfaces of the bus duct, respectively, and the first and second temperature sensing lines are connected to the connection module or the It may be formed by winding in a circular shape at the connecting portion.

In the system, a length formed by winding the first and second temperature sensing lines in a circular shape may be between 1 m and less than 5 m.

In the system, the optical fiber cable may transmit the signal in a single mode.

As described above, according to the present embodiment, since the stimulated Brillouin scattering method is used, the distributed temperature sensor can be easily compatible with other optical communication devices and systems supporting single mode.

According to this embodiment, since the temperature value is calculated from the frequency shift analysis, the temperature can be accurately sensed without being affected by loss.

And according to this embodiment, since the optical fiber cable can be freely coupled through the connector and the adapter and bent in a curved shape, the degree of freedom of installation in the bus duct can be increased.

On the other hand, even if the effects are not explicitly mentioned here, it is added that the effects described in the following specification expected by the technical features of the present invention and their provisional effects are treated as described in the specification of the present invention.

1 is a diagram for explaining types of scattering generated by a scattering phenomenon of an optical fiber cable according to an exemplary embodiment.
2 is a configuration diagram of a booth duct system according to an embodiment.
3 is a view for explaining a method of coupling an optical fiber cable of a temperature sensing device according to an exemplary embodiment.
4 is a diagram illustrating a connection between a temperature sensing device and an optical fiber cable according to an exemplary embodiment.
5 is a first exemplary view illustrating a method in which an optical fiber cable of a temperature sensing device according to an embodiment is installed in a booth duct.
6 is a second exemplary view illustrating a method in which an optical fiber cable of a temperature sensing device according to an embodiment is laid in a booth duct.
7 is an exemplary view illustrating a method in which an optical fiber cable of a temperature sensing device according to an embodiment is laid at a point where a bus duct terminates.
It is revealed that the accompanying drawings are illustrated as references for understanding the technical idea of the present invention, and thereby the scope of the present invention is not limited thereto.

In the description of the present invention, if it is determined that a related known function may unnecessarily obscure the subject matter of the present invention as an obvious matter to those skilled in the art, the detailed description thereof will be omitted.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Hereinafter, an embodiment of the booth duct system according to the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same or corresponding components are assigned the same reference numerals and overlapping Description is omitted.

1 is a diagram for explaining types of scattering generated by a scattering phenomenon of an optical fiber cable according to an exemplary embodiment.

The temperature sensing device of the booth duct system can measure the temperature of the booth duct, that is, the change in temperature, through a scattering phenomenon that occurs when light is incident on an optical fiber cable and the incident light passes through. The temperature sensing device may receive and analyze scattered light generated by the scattering phenomenon. The temperature sensing device may determine whether or not the temperature of the bus duct has changed through the intensity or frequency of the scattered light—specifically, the amount of change. Typically, Raman scattering analysis may use the intensity of scattered light, and the Brillouin scattering method may use the frequency of scattered light.

Referring to FIG. 1, various types of scattered light generated from an optical fiber cable are shown with respect to wavelength and amplitude.

When a very narrow laser beam is sent through a fiber optic cable, scattering occurs within the fiber optic cable. Some of the scattered light is reflected and received by the photodiode, and the amplitude can be much smaller than the amplitude of the incident light. If the optical fiber's surrounding environment (temperature, strain, pressure, etc.) changes, three types of scattering - Rayleigh scattering, Raman scattering, and Brillouin scattering - can appear. there is.

Rayleigh scattering has large amplitudes and is usually associated with density changes around fiber optic cables and has no wavelength shift. Wavelength displacement can be understood as a degree of deviation from the wavelength of incident light. A Rayleigh band may substantially coincide with the wavelength of incident light.

Raman scattering may appear while being affected by a temperature change around the cable at the rear of the laser traveling direction. Back Raman scattered light belonging to the Stokes range appears regardless of temperature change, and backward Raman scattered light belonging to the anti-Stokes range shows a sensitive response in amplitude according to temperature change. Therefore, temperature measurements can be made from analysis of Raman scattering intensities - intensities - of Stokes and Anti-Stokes. Since Raman scattered light has a large wavelength shift width, it is relatively easy to separate the wavelength shift width from an analysis point of view, and it may be advantageous to increase angular resolution of temperature measurement.

When light passes through a medium, a refractive index change of a certain period is caused in the medium, and some light may be scattered by this refractive index change. This may be termed Brillouin scattering. Since Brillouin scattered light is also separated into two components, that is, wavelengths in the Stokes and anti-Stokes ranges, they may have different wavelengths from the incident light. Brillouin scattering can react sensitively to external influences such as temperature, strain, and pressure. So, if the temperature of the fiber optic cable changes, the frequency characteristics of the Brillouin scattered light may also change.

Here, when Raman scattering and Brillouin scattering are compared, Raman scattered light is shifted by about 10 nm from incident light, and a temperature value can be calculated through a change in amplitude of Raman scattered light. Therefore, temperature sensors based on Raman scattering are sensitive to fastening loss and bending loss, which can cause errors in temperature measurement. On the other hand, the Brillouin scattered light is shifted by about 0.08 nm from the incident light, and the temperature value can be calculated through the amount of change in the frequency of the Brillouin scattered light. Therefore, Brillouin scattered light is insensitive to loss and can perform accurate temperature measurement even with a large amplitude. In addition, since it is based on the method of inducing scattering by incident light from both sides, it is possible to control the occurrence of scattering, thereby increasing the resolution and measuring the temperature change in detail.

2 is a configuration diagram of a booth duct system according to an embodiment.

Referring to FIG. 2 , the booth duct system 100 may include a temperature sensing device 110 and a booth duct 120. Here, the temperature sensing device 110 includes a temperature implementation unit 111 and a temperature sensor 112, and the temperature implementation unit 111 includes a light source unit 111-1, a light modulation unit 111-2, and an optical detection unit ( 111-3) and a signal processing unit 111-4.

The temperature sensing device 110 may measure the temperature of the booth duct 120 through the temperature sensor 112 and calculate the temperature value of the booth duct 120 from the measurement result through the temperature realization unit 111. . Here, the temperature sensing device 110 may use the stimulated Brillouin scattering method.

Representatively, the stimulated Brillouin scattering method may include Brillouin optical time domain analysis (BOTDA) or Brillouin optical correlation domain analysis (BOCDA). Here, BOTDA is an analysis method in which pump light and probe light having different frequencies propagate oppositely to both ends of an optical fiber cable to generate induced scattering, and may be an analysis method in which scattered light is temporally resolved. On the other hand, BOCDA is an analysis method that generates induced scattering by propagating pump light and probe light with different frequencies in opposite directions at both ends of an optical fiber cable. may be an interpretation.

The temperature realization unit 111 generates and transmits light for sensing the temperature of the booth duct 120 with the temperature sensor 112, and receives and processes the scattered light formed for the incident light from the temperature sensor 112 to generate the booth duct ( 120) or the temperature change amount can be calculated.

Specifically, the light source unit 111-1 may generate light to be used in an optical fiber cable operating as the temperature sensor 112. For example, the light source unit 111-1 may include a laser and a function generator. The function generator may modulate the current supplied to the laser to cause the laser to generate high-output light modulated in the form of a sine wave.

The light modulator 111-2 may generate a plurality of lights and inject them into the fiber optic cable to cause stimulated Brillouin scattering in the fiber optic cable. For example, the light modulator 111-2 may separately generate the first light and the second light independent of the first light. The light modulator 111-2 may receive light modulated with a specific frequency from the light source unit 111-1 and generate first and second lights therefrom. The light modulator 111-2 may apply the first and second lights to both ends of the optical fiber cable. Here, the first light may be referred to as a pump light, and the second light may be referred to as a probe light.

The light detector 111-3 may detect Brillouin scattered light generated from the temperature sensor 112, that is, the optical fiber cable. The light detector 111-3 may include an optical filter that blocks Rayleigh scattered light from scattered light received from the optical fiber cable. The photodetector 111-3 may convert the Brillouin scattered light into an electrical signal through a photoelectric converter.

The signal processor 111-4 may receive the electrical signal converted from the scattered light and measure a physical change (for example, a change in temperature) from the electrical signal. For example, the signal processing unit 111-4 may calculate a temperature value or a temperature change amount from a frequency change amount of scattered light according to a distance of the booth duct 120 and determine whether heat is generated.

The temperature sensor 112 may be an optical fiber cable. The temperature sensor 112 may be disposed at a location where temperature (change) is to be measured using Brillouin scattering in an optical path. An optical fiber cable used for temperature detection may support single mode or multimode, but an optical fiber cable supporting single mode is preferably used. Since stimulated Brillouin scattering can also occur in single-mode fiber optic cables, the temperature sensing device and booth duct system according to an embodiment may be compatible with other devices or systems using single-mode fiber optic cables, such as distributed acoustic sensors. can

The temperature sensor 112 may generate a signal (generated by Brillouin scattering among scattered light) having a frequency that varies according to temperature through an optical fiber cable. The temperature implementation unit 111 may indirectly determine the amount of change in temperature through the amount of change in frequency, and through this, it may be possible to determine whether the temperature of the booth duct 120 is changed.

3 is a view for explaining a method of coupling an optical fiber cable of a temperature sensing device according to an exemplary embodiment.

Referring to FIG. 3 , fiber optic cables (FOC) may be coupled to each other through a connector CNT and an adapter ADT.

An optical fiber cable (FOC) may be composed of a fiber bundle and a protective material (tube) surrounding it. In order for a plurality of fiber optic cables (FOC) to be coupled to each other, fiber bundles cannot be directly connected and a medium may be required. The connector CNT may function as an interface so that the fiber optic cable FOC is connected to other devices.

The connector (CNT) can be classified into SC (subscriber connector) type, FC (fiber transmission system connector) type, ST (straight tip connector) type, Bi (biconic connector) type, and MU (miniature unit connector) type according to the connection type. can In addition, the connector CNT may be classified into an air gap (AG) type, a physical contact (PC) type, and an angled physical contact (APC) type according to the shape of the contact interface. Preferably, in this embodiment, an E2000 APC type connector (CNT) having a dustproof effect as the dust cap automatically opens and closes when fastened or disconnected may be used.

An adapter (ADT) may terminate or connect a fiber optic cable (FOC) or connector (CNT). An adapter (ADT) may couple a plurality of fiber optic cables (FOC) including connectors at both ends. The adapter ADT may extend the optical fiber cable FOC by coupling the connector CNT coupled to one end of the optical fiber cable FOC and the connector CNT coupled to the other end of the optical fiber cable FOC. .

The connection of the fiber optic cable (FOC), the connector (CNT) and the adapter (ADT) may be made in the following order. First, a connector (CNT) on one side of the adapter (ADT) may be inserted into both ends or one end of the optical fiber cable (FOC) and coupled thereto. On the opposite side, a fiber optic cable (FOC) with a connector (CNT) coupled in the same way may be prepared. Next, the optical fiber cables FOC coupled to the connector CNT at both sides of the adapter ADT may be inserted into the adapter ADT and coupled thereto. Arrow directions in this figure indicate coupling directions of the fiber optic cable (FOC), the connector (CNT), and the adapter (ADT), respectively.

4 is a diagram illustrating a connection between a temperature sensing device and an optical fiber cable according to an exemplary embodiment.

Referring to FIG. 4 , fiber optic cables FOC1 and FOC2 operating as temperature sensors may be laid on the upper and lower surfaces of the bus duct 120 . For example, to generate stimulated Brillouin scattering, the temperature sensing device may inject a first light as a pump light into a first optical fiber cable FOC1 and a second light as a probe light into a second optical fiber cable FOC2. . In this way, the first optical fiber cable FOC1 installed on the upper part of the booth duct 120 is the first temperature sensing line, and the second optical fiber cable FOC2 installed on the lower part of the booth duct 120 is the second temperature sensing line. , respectively, can be formed.

The first and second temperature sensing lines may be formed by an extended optical fiber cable in which an optical fiber cable (FOC1 or FOC2), a connector, and an adapter are coupled to each other. The first and second temperature sensing lines may start individually from the temperature implementing unit 111 . This is because the first light and the second light—the pump light and the probe light—are incident from the temperature realization unit 111, respectively. The first and second temperature sensing lines extend along the upper and lower surfaces of the booth duct 120, respectively, and are connected to each other at the point where the booth duct 120 ends, that is, the point where the installation of the booth duct 120 ends, forming a loop (loop) can be formed.

5 is a first exemplary view illustrating a method in which an optical fiber cable of a temperature sensing device according to an embodiment is laid in a booth duct.

Referring to FIG. 5, a first example in which optical fiber cables FOC1 and FOC2 are laid in a bus duct (120 in FIG. 2) is shown. The bus duct (120 in FIG. 2) may be formed of a plurality of modules. The plurality of modules include a booth duct module 510 including a conductor 512 functioning as a bus bar and a connection module 520 connecting the conductors 512 of different booth duct modules 510 to each other. can do. The optical fiber cables FOC1 and FOC2 operating as temperature sensors may be formed by extending along the booth duct module 510 and the connection module 520.

The booth duct module 510 may include an enclosure 511 and a conductor 512. A current-carrying conductor 512 can deliver power to its destination. The enclosure 511 may insert and include a conductor 512 therein and surround the conductor 512 to insulate it from the outside.

The connection module 520 may be combined with the booth duct module 510 at both ends. The connection module 520 includes a space into which the conductor 512 can be inserted, and when the conductor 512 of each booth duct module 510 is inserted into the space, the conductors 512 can be electrically connected to each other. . Therefore, power supplied by one end of the booth duct module 510 can be transmitted to the other end of the booth duct module 510. In this drawing, the arrow direction may indicate a direction in which the booth duct module 510 and the connection module 520 are coupled.

Meanwhile, the optical fiber cables FOC1 and FOC2 for sensing the temperature may be arranged in a straight line in the booth duct module 510 to form first and second temperature sensing lines. The first optical fiber cable (FOC1) is installed in a straight line on the top of the booth duct module 510 to receive pump light from the temperature realization device. The second fiber optic cable (FOC2) is installed in a straight line under the booth duct module 510 to receive probe light from the temperature realization device.

In addition, the optical fiber cables FOC1 and FOC2 may be disposed by being wound in a circular shape in the connection module 520 . A length formed by winding the optical fiber cables FOC1 and FOC2 in a circular shape may be at least 1 m or more. The length may preferably be between 1 m and less than 5 m for a loose arrangement. The first optical fiber cable FOC1 forming the first temperature sensing line may be wound circularly on the surface of the connection module 520, and the second optical fiber cable FOC2 forming the second temperature sensing line may be wound circularly. Each of the rolled parts may be overlapped and installed on the surface of the connection module 520 .

Here, the optical fiber cables FOC1 and FOC2 may be installed in a straight line or a circular shape using a connector CNT and an adapter ADT. As described in FIG. 3 , the optical fiber cable FOC coupled with the connector CNT may be inserted at both ends of the adapter ADT. A plurality of optical fiber cables FOC1 and FOC2 may be extended through an adapter ADT.

6 is a second exemplary view illustrating a method in which an optical fiber cable of a temperature sensing device according to an embodiment is laid in a booth duct.

Referring to FIG. 6, a second example in which the optical fiber cables FOC1 and FOC2 are installed in a booth duct (120 in FIG. 2) is shown. The bus duct (120 in FIG. 2) may be formed of a plurality of modules. The plurality of modules include a booth duct module 510 including a conductor 512 functioning as a bus bar and a connection duct module 620 integrally formed with a connection portion 623 coupled to the conductor 512 can include The optical fiber cables FOC1 and FOC2 operating as temperature sensors may be formed by extending along the booth duct module 510 and the connection booth duct module 620.

The booth duct module 510 may include an enclosure 511 and a conductor 512. A current-carrying conductor 512 can deliver power to its destination. The enclosure 511 may insert and include a conductor 512 therein and surround the conductor 512 to insulate it from the outside.

The connecting booth duct module 620 may be coupled to the booth duct module 510 at one end or both ends through the connecting portion 623. The connection part 623 includes a space into which the conductor 512 can be inserted. When the conductor 512 of the booth duct module 510 is inserted into the space, the conductor 512 of the booth duct module 510 and Conductors of the connection booth duct module 620 may be electrically connected to each other. Therefore, power supplied by the booth duct module 510 can be transmitted to the connection booth duct module 620 at the other end. In this drawing, the arrow direction may indicate a direction in which the booth duct module 510 and the connection booth duct module 620 are coupled.

Meanwhile, the optical fiber cables FOC1 and FOC2 for sensing the temperature may be arranged in a straight line in the booth duct module 510 to form first and second temperature sensing lines. The first optical fiber cable (FOC1) is installed in a straight line on the top of the booth duct module 510 to receive pump light from the temperature realization device. The second fiber optic cable (FOC2) is installed in a straight line under the booth duct module 510 to receive probe light from the temperature realization device.

In addition, the optical fiber cables FOC1 and FOC2 may be disposed by being wound in a circular shape at the connection part 623 . A length formed by winding the optical fiber cables FOC1 and FOC2 in a circular shape may be at least 1 m or more. The length may preferably be between 1 m and less than 5 m for a loose arrangement. The first optical fiber cable FOC1 forming the first temperature sensing line may be circularly wound on the surface of the connection part 623, and the second optical fiber cable FOC2 forming the second temperature sensing line separately may be circularly wound. Each of the rolled parts may be overlapped and laid on the surface of the connecting portion 623 .

Here, the optical fiber cables FOC1 and FOC2 may be installed in a straight line or a circular shape using a connector CNT and an adapter ADT. As described in FIG. 3 , the optical fiber cable FOC coupled with the connector CNT may be inserted at both ends of the adapter ADT. A plurality of optical fiber cables FOC1 and FOC2 may be extended through an adapter ADT.

As described above, according to one embodiment, since the temperature sensing device of the bus duct system uses the stimulated Brillouin scattering method, it is insensitive to fastening loss and bending loss. So, since the fiber optic cables (FOC1, FOC2) can be laid by winding them in a circle at the connection point between each module constituting the bus duct, there are fewer restrictions on laying and the degree of freedom of laying can be increased. In addition, coupling between the optical fiber cables FOC1 and FOC2 can be facilitated by using a connector and an adapter, and thus the cost of installing a bus duct can be reduced.

7 is an exemplary view illustrating a method in which an optical fiber cable of a temperature sensing device according to an embodiment is laid at a point where a bus duct terminates.

Referring to FIG. 7, a method in which optical fiber cables FOC1 and FOC2 are laid at the point where the bus duct terminates is shown.

The first optical fiber cable (FOC1) originating from the temperature realization unit forms a first temperature sensing line and is laid along the top of the bus duct, and the second optical fiber cable originates from the temperature implementation unit independently of the first optical fiber cable (FOC1). (FOC2) can be installed along the bottom. The first optical fiber cable FOC1 and the second optical fiber cable FOC2 may be coupled to each other at a point where the bus duct ends (a point where the arrangement of the bus duct ends). The first optical fiber cable FOC1 and the second optical fiber cable FOC2 may be coupled to each other through the connector CNT and the adapter ADT to form one loop. Due to this combination, the first temperature sensing line and the second temperature sensing line may form a single temperature sensing line. The first light and the second light may be incident from the temperature realization unit and induce Brillouin scattering in a single temperature sensing line to measure the temperature of the bus duct. The amount of change in temperature may be expressed as the amount of change in the frequency of Brillouin scattered light.

The protection scope of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the protection scope of the present invention cannot be limited due to obvious changes or substitutions in the technical field to which the present invention belongs.

100: booth duct system
110: temperature sensing device
120: bus duct
FOC: fiber optic cable
CNT: connector
510: booth duct module
520: connection module

Claims (9)

A bus duct that transmits power; and
A temperature sensing device including a temperature sensor for measuring the temperature of the bus duct and using a guided Brillouin scattering method including BOTDA (brillouin optical time domain analysis) or BOCDA (brillouin optical correlation domain analysis),
The temperature sensor may include an optical fiber cable disposed outside the booth duct to sense the temperature of the booth duct and transmit a signal having a frequency varying according to the detected temperature through an optical fiber; a plurality of connectors coupled to both ends of the optical fiber cable; And an adapter that extends the optical fiber cable by coupling a connector coupled to one end of the optical fiber cable and a connector coupled to one end of the other optical fiber cable,
The temperature sensor includes a first temperature sensing line and a second temperature sensing line respectively formed on the top and bottom of the surface of the bus duct,
The first temperature sensing line includes both ends of the 1-1 optical fiber cable to which the 1-1 connector is coupled, the 1-2 optical fiber cable to which the 1-2 connector is coupled, and the 1-1 and 1-2 optical fiber cables. A first adapter coupled at,
The first adapter extends the first temperature sensing line over the top of the surface of the bus duct by connecting the 1-1 and 1-2 optical fiber cables,
The second temperature sensing line has both ends of the 2-1 optical fiber cable to which the 2-1 connector is coupled, the 2-2 optical fiber cable to which the 2-2 connector is coupled, and the 2-1 and 2-2 optical fiber cables. A second adapter coupled at
The second adapter connects the 2-1 and 2-2 optical fiber cables to extend the second temperature sensing line across the lower portion of the surface of the booth duct. delete According to claim 1,
The booth duct includes a plurality of booth duct modules including a conductor through which current flows and an enclosure that surrounds the conductor and insulates it from the outside, and a connection module connecting the plurality of booth duct modules,
The temperature sensor is disposed in a straight line in the plurality of booth duct modules, and is wound and disposed in a circular shape in the connection module. According to claim 1,
The booth duct includes a booth duct module including a conductor through which current flows and an enclosure that surrounds the conductor and insulates the conductor from the outside, and includes the conductor and the enclosure, but is formed integrally with the enclosure and is coupled with the conductor of the booth duct module. Including a connection booth duct module further comprising a connection portion to do,
The temperature sensor is disposed in a straight line in the enclosure of the booth duct module, and is wound and disposed in a circular shape in the connection part. According to claim 1,
The temperature sensing device includes a temperature implementation unit that analyzes the signal to generate a temperature value for the bus duct,
The first and second temperature sensing lines start individually at the temperature realization unit and are connected to each other at a point where the booth duct ends to form a loop. According to claim 5,
The temperature realization unit is a booth duct system for injecting a first light through the first temperature sensing line and incident a second light independent of the first light through the second temperature sensing line. delete According to claim 1,
A booth duct system in which the length formed by winding the first and second temperature sensing lines in a circular shape is from 1 m to less than 5 m. delete

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