KR101986140B1 - Apparatus for assisting opening/closing of circuit breaker - Google Patents

Abstract

The present invention relates to an apparatus for assisting in opening/closing of a circuit breaker, which corrects a thermal image for a circuit breaker based on a visible image for the circuit breaker, and assists in opening and closing operations of the corresponding circuit breaker based on a temperature identified by the corrected thermal image. According to an embodiment of the present invention, the apparatus for assisting in opening/closing of a circuit breaker assists in opening/closing of a circuit breaker connected between a system and a load, and comprises: a material identification unit to use a light source to acquire a visible image for the circuit breaker, and identify a material photographed in the acquired visible image; an image correction unit to acquire a thermal image for the circuit breaker, and correct the thermal image based on the emissivity of the identified material; a diagnosis unit to identify a normal operation state of the circuit breaker based on a temperature value detected in the corrected thermal image, and compare the identified normal operation state and a current operation state of the circuit breaker to diagnose whether a fault of the circuit breaker exists; and a control unit to generate a control signal in accordance with the fault of the circuit breaker, and supply the generated control signal to the circuit breaker.

Description

[0001] APPARATUS FOR ASSISTING OPENING / CLOSING OF CIRCUIT BREAKER [0002]

The present invention relates to a breaker opening and closing assisting device for correcting a thermal image of a circuit breaker based on a visible image of the circuit breaker and assisting opening and closing operations of the circuit breaker based on the temperature identified through the corrected thermal image.

A circuit breaker (CB) is connected between a system for supplying power and a load for receiving power from the system, and when the overcurrent flows through the load, it detects the overcurrent and blocks the power supply to the load.

The circuit breaker includes a relay for selectively opening and closing a circuit, for example, an OCR (Over Current Relay) driven by a mechanical contact, an Electronic Over Current Relay (EOCR) driven by a semiconductor non-contact type, and the like.

The circuit breaker selectively opens and closes the circuit by providing a control signal to the internal relay according to the magnitude of the current flowing in the load.

In this case, when the control signal is not provided to the relay in a specific control cycle or a control signal erroneously generated is provided to the relay, the relay is opened and closed in the reverse direction, so that the overcurrent flows to the load or the power supplied to the load is interrupted .

Although the overcurrent and momentary power interruption can adversely affect the load and other systems connected to the load, the user has a problem that the state of the load and the system is interpreted in reverse to the actual state by reliance of the operation state of the circuit breaker.

Accordingly, there is a need for a method for protecting the load and the system by additionally controlling the operation of the circuit breaker in the event of failure of the circuit breaker in the event of failure of the circuit breaker outside the circuit breaker.

An object of the present invention is to provide a circuit breaker opening / closing assisting device capable of improving the accuracy of temperature measurement through thermal imaging by correcting thermal image of the circuit breaker according to the emissivity of the material constituting the circuit breaker.

It is another object of the present invention to provide a circuit breaker opening and closing assisting apparatus capable of reflecting a surface state of a material in correcting a thermal image by determining the emissivity of a material photographed in a visible image according to a color change rate of a visible image .

It is another object of the present invention to provide a circuit breaker opening / closing assisting device capable of detecting whether a circuit breaker is malfunctioning by comparing a normal open / close state of the circuit breaker identified through thermal imaging of the circuit breaker with a current open / close state.

The present invention also provides a breaker opening and closing assisting device capable of preventing an overcurrent and an interruption of power supply due to a malfunction of a circuit breaker by assisting the opening and closing operations of the circuit breaker based on the temperature detected through thermal imaging of the circuit breaker .

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided an apparatus for assisting opening and closing of a circuit breaker connected between a system and a load, comprising: a light source for obtaining a visual image of the circuit breaker; An image correction unit that obtains a thermal image for the breaker and corrects the thermal image based on the emissivity of the identified material, a corrected image correction unit for correcting the thermal image based on the emissivity of the identified material, A diagnostic unit for diagnosing whether the breaker is faulty by comparing a normal operation state of the breaker based on a temperature value detected in an image and comparing the identified normal operation state with a current operation state of the breaker, And a control unit for generating a control signal in accordance with the failure, and providing the generated control signal to the breaker .

As described above, according to the present invention, the thermal image of the circuit breaker is corrected according to the emissivity of the material constituting the circuit breaker, thereby improving the accuracy of the temperature measurement through the thermal image.

According to the present invention, the emissivity of the material photographed in the visible image is determined according to the color change rate of the visible image, thereby reflecting the surface state of the material in correcting the thermal image.

In addition, according to the present invention, there is an effect that a breakdown of a circuit breaker can be detected by comparing a normal open / close state of the circuit breaker identified through a thermal image of the circuit breaker with a current open / close state.

According to the present invention, the open / close operation of the circuit breaker is assisted based on the temperature detected through the thermal image of the circuit breaker, thereby preventing overcurrent generation and power supply interruption due to malfunction of the circuit breaker.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view illustrating a breaker opening and closing assisting apparatus according to an embodiment of the present invention; FIG.
2 is a view showing a state where a circuit breaker opening and closing assisting device according to an embodiment of the present invention controls a circuit breaker connected between a circuit and a load.
3 is a view showing an example of the circuit breaker shown in Fig. 2. Fig.
4 is a view showing an example of a visible image for a breaker;
5 is a diagram showing an example of a thermal image for a breaker;
6 is a view showing color data detected at an arbitrary coordinate of a visible image;
7 is a diagram showing color spaces for RGB data;
8 is a diagram showing the emissivity for arbitrary coordinates of a thermal image.
9 is a view showing a state in which a thermal image is corrected according to an emissivity;

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for assisting opening and closing of a circuit breaker connected between a system and a load and for identifying a temperature of a circuit breaker that has failed in the opening and closing operation, will be.

More particularly, the present invention relates to an apparatus for calibrating a thermal image for a circuit breaker based on a visible image of the circuit breaker, and for assisting opening and closing operations of the circuit breaker based on the temperature identified through the corrected thermal image .

A circuit breaker (CB) is connected between a system supplying power and a load supplied with power from the system, and when an over-current flows in the load, the circuit breaker CB can function to shut off the power supply to the load.

The circuit breaker may include a relay for selectively opening and closing the circuit, for example, an OCR (Over Current Relay) driven by a mechanical contact, an Electronic Over Current Relay (EOCR) driven by a semiconductor non-contact type, have.

The circuit breaker opening / closing assisting device described later can be connected to the circuit breaker described above to diagnose whether the circuit breaker is faulty or not, and to control the circuit breaker when the circuit breaker fails.

Hereinafter, a circuit breaker opening and closing assisting apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 9. FIG.

FIG. 1 is a view illustrating a circuit breaker opening and closing assisting apparatus according to an embodiment of the present invention. FIG. 2 is a view illustrating a circuit breaker opening and closing assisting apparatus according to an embodiment of the present invention controlling a circuit breaker connected between the circuit and the load. Fig.

3 is a view showing an example of the circuit breaker shown in Fig.

FIG. 4 is a diagram illustrating an example of a visible image of a circuit breaker, and FIG. 5 is a diagram illustrating an example of a thermal image of the circuit breaker.

Fig. 6 is a view showing color data detected at an arbitrary coordinate of a visible image, Fig. 7 is a view showing a color space for RGB data, and Fig. 8 is a diagram showing emissivity for arbitrary coordinates of a thermal image Fig.

FIG. 9 is a view showing a thermal image corrected according to the emissivity. FIG.

1, a circuit breaker opening and closing assisting apparatus 100 according to an embodiment of the present invention may include a substance identifying unit 110, an image correcting unit 120, a diagnosis unit 130, and a control unit 140 have. The circuit breaker opening and closing assisting device 100 shown in FIG. 1 is according to one embodiment, and the constituent elements thereof are not limited to the embodiment shown in FIG. 1, and some components may be added, changed or deleted .

Each component constituting the circuit breaker opening and closing assisting device 100 may include a processor and a memory, and may perform each function described below according to the operation of the processor using the memory. Alternatively, each component may perform the functions described below by one main processor.

Referring to FIG. 2, the breaker opening and closing assisting apparatus 100 may be connected to the circuit breaker 10 provided between the system 200 and the load 300. Although the circuit breaker 10 is illustrated in FIG. 2, the circuit breaker 10 may be configured in various ways to selectively open and close circuits between the system 200 and the load 300 .

For example, the circuit breaker 10 may be an air circuit breaker (ACB) that performs a shut-off operation through a SOHO system using air as an insulating material.

3 is a view showing an air circuit breaker as an example of the circuit breaker 10. As shown in Fig. Referring to FIG. 3, the circuit breaker 10 may be mounted in a case in which an internal circuit (not shown) for performing a breaking operation is provided with an external interface.

The user can supply power to the breaker 10 or interrupt the power supply through the external interface, monitor the operation state of the breaker 10, and adjust the magnitude of the cut-off current.

The material identification unit 110 can obtain the visible image 400 for the circuit breaker 10 using the light source.

The material identification unit 110 may perform data communication with a camera (not shown) installed inside or outside the circuit breaker opening and closing assisting apparatus 100 to receive the visible image 400 from the camera. Here, the camera is any camera that senses the light reflected by the circuit breaker 10, and may be a digital camera capable of data communication.

The material identification unit 110 can control on / off, illuminance, and angle of the light source. At this time, the camera can generate the visible image 400 by detecting the light reflected from the circuit breaker 10, which is generated in the light source.

The camera may be installed outside the circuit breaker 10 to sense the light reflected from the outer surface of the circuit breaker 10 to generate the visible image 400. The camera may be installed inside the circuit breaker 10, The visible image 400 may be generated by sensing light. The position of the camera is not limited thereto and may be installed at any position that can be detected from the light source and reflected by the circuit breaker 10.

4, in one example, the camera generates a visible image 400 for a portion where the bus bar 11 inside the circuit breaker 10 and the heat sink 12 are adjacent to each other, 400 may be provided to the material identification unit 110.

The material identification unit 110 may identify a material photographed in the visible image 400. [

The materials constituting the circuit breaker 10 may have different colors. Accordingly, each material photographed in the visible image 400 can be expressed in different colors depending on the kind of the material.

The material identifying unit 110 can identify the type of the material photographed in the visible image 400 according to the color represented in the visible image 400.

More specifically, the material identifying unit 110 can identify the photographed material at each coordinate of the visible image 400 based on the color data detected at each coordinate of the visible image 400. [

The material identification unit 110 can detect coordinates of an arbitrary measurement point in the visible image 400 and extract color data corresponding to the detected coordinates.

Referring to FIG. 6, the visible image 400 may be divided into grid shapes, and each grid may have coordinates. 6, the substance identifying unit 110 sets the coordinates of the first to fourth measurement points to (X1, Y1), (X2, Y2), (X3, Y3) ). ≪ / RTI >

Subsequently, the material identification unit 110 can extract the color data represented by the detected coordinates. Here, the color data may include RGB (Red, Green, Blue) data, HSV (Hue Saturation Value) data, CMY (Cyan, Magenta, Yellow) data, YUV data and CMYK data. In the following description, color data is assumed to be RGB data.

The material identification unit 110 extracts each of the red (R), green (G) and blue (B) components of the color represented by the coordinates of the measurement point, collects the extracted components, have.

For example, the material identification unit 110 may collect data on the R component, the G component, and the B component represented by the coordinates (X1, Y1) to detect the color data of the first measurement point as RGB1.

In this way, the material identification unit 110 collects the data concerning the R component, the G component, and the B component represented by the coordinates (X2, Y2), (X3, Y3) 4 Color data of the measurement point can be detected as RGB 2, RGB 3 and RGB 4, respectively.

4, only the color data for four coordinates are detected. However, this is for the convenience of explanation. The material identification unit 110 detects color data for arbitrary coordinates in the visible image 400 can do.

The material identification unit 110 can identify the photographed material at the coordinates based on the color data of each coordinate.

More specifically, the material identification unit 110 can identify the photographed material at each coordinate with reference to the reference color data stored in the memory. The reference color data may include information on the material corresponding to the detected color data.

The reference color data may be stored in the memory in the form of a color table corresponding to any material or may be stored in memory in the form of a color space corresponding to any material.

Referring to FIG. 7, information about a RGB color space represented by a three-dimensional space and a material corresponding to an arbitrary position in the RGB color space may be stored in the memory according to the sizes of the R component, the G component, and the B component have.

The material identifying unit 110 detects the color coordinates of the first to fourth measurement points in the RGV color space based on the coordinates (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4) The positions of the color data (RGB 1, RGB 2, RGB 3, and RGB 4) can be identified as C1 to C4, respectively.

Meanwhile, in the memory of the material identification unit 110, materials corresponding to respective positions of the RGB color space may be stored in advance as shown in [Table 1] below.

[location] [matter] C1 M1 C2 M2 C3 M3 C4 M4

The material identifying unit 110 may refer to the memory to identify the material photographed at the coordinates (X1, Y1) of the first measuring point as M1 and to record the photographed material at the coordinates (X2, Y2) The substance photographed at the coordinates (X3, Y3) of the third measuring point can be identified as M3, and the substance photographed at the coordinates (X4, Y4) of the fourth measuring point can be identified as M4.

On the other hand, the image correcting unit 120 can acquire the thermal image 500 for the circuit breaker 10.

The image correcting unit 120 may receive the thermal image 500 from the thermal imaging camera by performing data communication with a thermal imaging camera (not shown) installed inside or outside the circuit breaker opening and closing assistant 100.

The thermal imaging camera may include any camera that senses heat generated by the circuit breaker 10, and may include, for example, an infrared camera.

The thermal imaging camera may be installed outside the circuit breaker 10 to sense heat generated from the outer surface of the circuit breaker 10 or may be installed inside the circuit breaker 10 to sense heat generated in the circuit breaker 10 internal device .

The thermal imaging camera may generate the thermal imaging image 500 using heat emitted from the circuit breaker 10. More specifically, the thermal imaging camera can generate the thermal image 500 by representing the circuit breaker 10 in different colors according to the intensity of the heat radiated from each part of the circuit breaker 10.

Referring to FIG. 5, the circuit breakers 10 represented in the thermal image 500 may be represented by different colors according to the reference temperature range 520 of the thermal image 500. Here, the reference temperature range 520 may include temperature information according to the color expressed in the thermal image 500.

On the other hand, the photographing range of the thermal imaging camera can be included in the photographing range of the camera described above. That is, the shooting range of the camera may include all of the shooting range of the thermal imaging camera.

Accordingly, any part of the circuit breaker 10 represented in the thermal image 500 can be included in the above-described visible image 400. In other words, the specific shooting region 510 represented in the thermal image 500 of FIG. 5 may be included in the visible image 400 of FIG. 4 (410 of FIG. 4).

4 and 5, the bus bar 11 is a conductor for supplying a large current to the load 300. The temperature of the bus bar 11 is set to a large value when the magnitude of the current flowing in the load 300 increases Can rise.

On the other hand, the heat sink 12 adjacent to the bus bar 11 is a conductor having a wide surface area, and can absorb the heat generated by the bus bar 11, thereby lowering the temperature of the bus bar 11. [

Accordingly, the temperature of the bus bar 11 can always be higher than the temperature of the heat sink 12.

However, if the emissivity of the material constituting the heat sink 12 is larger than the emissivity of the material constituting the bus bar 11, it is possible to detect in the specific photographing area 510 of the thermal image 500, The temperature of the heat sink 12 may be higher than the temperature of the bus bar 11. [

In order to prevent such inaccuracies of the temperature measurement, the image correction unit 120 may correct the thermal image 500 based on the emissivity of the material identified by the material identification unit 110.

The image correcting unit 120 corrects the temperature of the thermal image 500 so that if the emissivity of the substance identified by the material identification unit 110 is higher than the preset basic emissivity of the thermal image camera, (500) can be corrected.

If the emissivity of the substance identified by the substance identification unit 110 is lower than the basic emissivity set in advance in the thermal imaging camera, the image correction unit 120 may be configured such that the temperature of the substance in the thermal image 500 is detected to be high The thermal image 500 can be corrected.

More specifically, the image corrector 120 may correct the thermal image 500 corresponding to each coordinate of the visible image 400 based on the emissivity of the identified material.

The shooting range of the thermal image 500 may be included in the shooting range of the visible image 400 as described above. At this time, the coordinates of the visible image 400 with respect to one point of the circuit breaker 10 may be the same as the coordinates of the thermal image 500.

(X1, Y1), (X2, Y2), (X3, Y3), and (X4) of the first to fourth measurement points in the visible image 400 shown in FIG. 6, Y4) of the first to fourth measurement points in the thermal image 500 shown in Fig. 8 are obtained by multiplying the coordinates ((X1, Y1), (X2, Y2), (X3, Y3) ≪ / RTI >

That is, the visible image 400 and the thermal image 500 may share the same coordinate system, and the coordinates of one point of the circuit breaker 10 may be the same in the visible image 400 and the thermal image 500 .

The image correcting unit 120 refers to the memory to determine the emissivity of the material identified at each coordinate of the visible image 400 and to correct the color data for each coordinate of the thermal image 500 based on the determined emissivity .

In the memory of the image correcting unit 120, the emissivity of each material and the corresponding material may be stored in the form of a look-up table (LUT). For example, in the memory, the emissivity corresponding to each substance can be stored in advance as shown in [Table 2] below.

[matter] [Emissivity] M1 e1 M2 e2 M3 e3 M4 e4

The image correcting unit 120 can refer to the memory to determine the emissivity of the material identified at each coordinate of the visible image 400. [

Accordingly, the image correcting unit 120 can determine the emissivity of the substance M1 identified at the coordinates (X1, Y1) of the first measurement point as e1 and determine the emissivity of the substance identified at the coordinates (X2, Y2) The emissivity of the substance M3 identified at the coordinates (X3, Y3) of the third measurement point can be determined as e3 and the emissivity of the substance M3 identified at the coordinates (X4, Y4) The emissivity of the substance M4 may be determined as e4.

The material identifying unit 110 detects the color change rate of the visible image 400 in accordance with the movement of the light source and the image correcting unit 120 corrects the color of the visible image 400 and the material of the visible image 400, The emissivity of the material may be determined based on the rate of change.

As described above, the substance identification unit 110 can control the light source. More specifically, the material identification unit 110 can control the angle of the light source or control the position of the light source, and the camera can generate the visible image 400 according to the movement of the light source.

The camera may provide the visible image 400 generated in a continuous time in which the light source moves to the material identification unit 110. [ The material identification unit 110 can identify the photographed material at each coordinate of the visible image 400 based on the visible image 400 provided from the camera first.

The method of identifying the photographed material based on the visible image 400 has been described above, so that a detailed description thereof will be omitted.

Subsequently, the substance identifying unit 110 can receive a plurality of visible images 400 according to the movement of the light source from the camera, and detect the color change rate according to the movement of the light source with respect to arbitrary coordinates of the visible image 400 .

The emissivity of any material can vary depending on its surface condition. More specifically, if the surface state is smooth, the same material may have a relatively high emissivity. On the other hand, if the surface state is rough, the same material may have a relatively low emissivity.

On the other hand, when the surface state is smooth, since the reflectance to light generated from the light source is relatively high, the emissivity can be relatively high even for the same material. On the other hand, when the surface state is rough, the reflectance of light generated from the light source due to diffuse reflection is relatively low, so that the emissivity of the same material may be relatively low.

Accordingly, the image correcting unit 120 can determine the emissivity of the substance based on the color change rate detected by the substance identifying unit 110. [

More specifically, the image correcting unit 120 can determine the emissivity range of the photographed material in the visible image 400 by referring to the memory, and determine the emissivity included in the emissivity range based on the color change rate.

For example, the emissivity for the material M5 photographed at an arbitrary coordinate of the visible image 400 may be stored in advance in the memory as shown in [Table 3] below.

[matter] [Emissivity] M5 e5 to e6

At this time, the image correcting unit 120 may determine the emissivity range of the substance with respect to the substance M5 as e5 to e6 with reference to the memory.

The maximum and minimum color change rates for each material may be stored in advance in the memory, and the image correction unit 120 may calculate the maximum color change rate and the minimum color change rate for the material M5 Can be determined.

일 수 있다.For example, when the maximum color change rate and the minimum color change rate for the material M5 are respectively R2 and R1, the color change rate of the substance M5 identified through the visible image 400 is

Lt; / RTI >

로 결정할 수 있다.At this time, the image correcting unit 120 calculates the emissivity of the substance M5 in proportion to the color change rate of the substance M5 determined in the interval between the maximum color change rate and the minimum color change rate

.

As described above, the present invention can reflect the surface state of a material in correcting a thermal image by determining the emissivity of the material photographed in the visible image according to the color change rate of the visible image.

When the emissivity is determined, the image correcting unit 120 can correct the color data for each coordinate of the thermal image 500.

As shown in FIG. 8, the emissivity of the photographed material at each coordinate can be determined at each coordinate of the thermal image 500. At this time, the image correcting unit 120 can correct the color data of each coordinate of the thermal image 500 according to the emissivity determined for each coordinate.

The image correcting unit 120 may provide the thermal imaging camera with an emissivity control signal to control the thermal imaging camera to change the basic emissivity set for each coordinate of the thermal imager 500 to an emissivity determined according to each material.

Alternatively, the image correcting unit 120 may change the color data for each coordinate of the thermal image 500 according to the emissivity determined according to each material, without communicating with the thermal imager.

In addition, the method of correcting the thermal image 500 according to the emissivity can be performed according to various methods used in the art.

For example, referring to FIG. 9, the pre-correction thermal image 500 may include a person 530 and a concrete 540. At this time, the emissivity of the person 530 may be determined, for example, to be 0.98, and the emissivity of the concrete 540 may be determined to be, for example, 0.8.

The image correcting unit 120 can generate the corrected thermal image 500 'by correcting the color data corresponding to each coordinate of the thermal image 500 based on the determined emissivity.

As described above, the present invention can improve the accuracy of temperature measurement through thermal imaging by correcting the thermal image of the circuit breaker according to the emissivity of the material constituting the circuit breaker.

The diagnosis unit 130 identifies the normal operation state of the circuit breaker 10 based on the temperature value detected from the corrected thermal image 500 '(hereinafter referred to as a detected temperature value) 10) to compare the current operating state of the circuit breaker (10).

Here, the normal operation state may mean the normal open / close state of the circuit breaker 10 within the temperature condition detected in the corrected thermal image 500 '.

As described above, when the current supplied to the load 300 exceeds a certain magnitude and is determined to be an overcurrent, the circuit breaker 10 can cut off the current. At this time, as the current supplied to the load 300 increases, the temperature of the circuit breaker 10 may rise.

In the following description, the detected temperature value at the moment when the current supplied to the load 300 becomes an overcurrent is defined as a critical temperature. The state in which the breaker 10 provides the power of the system 200 to the load 300 is defined as a closed state and the state in which the power of the system 200 is prevented from being supplied to the load 300 is referred to as an open state .

For example, when the circuit breaker 10 is normally operated, if the detected temperature value is lower than the limit temperature, the circuit breaker 10 can be controlled in the closed state. Conversely, if the detected temperature value is equal to or higher than the limit temperature, the circuit breaker 10 can be controlled in the open state.

The normal operation state of the circuit breaker 10 according to the detected temperature value can be stored in advance in the memory. More specifically, the normal operating state of the circuit breaker 10 according to the temperature value detected at any measurement point of the circuit breaker 10 can be stored in the memory.

The diagnosis unit 130 can refer to the memory and identify the normal operation state of the vehicle according to the detected temperature value.

The limit temperature for any measurement point of the circuit breaker 10 can be stored in advance in the memory when an overcurrent flows to the load 300. [

The diagnostic unit 130 can identify the normal operation state of the circuit breaker 10 as a closed state if the detected temperature value is lower than the limit temperature. On the other hand, the diagnostic unit 130 can identify the normal operation state of the circuit breaker 10 as an open state if the detected temperature value is equal to or higher than the limit temperature.

In other words, the diagnosis unit 130 can determine whether an overcurrent has occurred in the load 300 based on the detected temperature value for any measurement point of the circuit breaker 10, The normal open / closed state can be identified.

The aforementioned detected temperature value may be a temperature value detected at any point (coordinate) among the temperature values detected in the thermal image 500 '.

Alternatively, the detected temperature value may be the maximum temperature value of which the magnitude of the detected temperature value in the thermal image 500 'is the maximum.

Accordingly, the diagnosis unit 130 can identify the maximum temperature value among the temperature values detected in the thermal image 500 'and identify the normal operation state of the circuit breaker 10 based on the identified maximum temperature value .

The diagnosis unit 130 may compare the identified normal operation state with the current operation state of the circuit breaker 10 to diagnose the failure of the circuit breaker 10.

Here, the current operating state of the circuit breaker 10 may indicate the current open / close state of the circuit breaker 10.

The diagnosis unit 130 can receive the operation state information of the circuit breaker 10 from the circuit breaker 10 and can identify the current operation state of the circuit breaker 10 based on the provided operation state information.

The diagnosis unit 130 can diagnose whether the circuit breaker 10 is faulty or not according to whether the normal operation state matches the current operation state of the circuit breaker 10. [

As described above, since the normal operation state and the current operation state all mean the open / close state of the circuit breaker 10, they may be in an open state or a closed state.

The diagnosis unit 130 can diagnose whether or not the circuit breaker 10 has failed by comparing the normal open / close state of the circuit breaker 10 identified based on the detected temperature value with the open / close state of the current circuit breaker 10.

For example, the diagnostic unit 130 may determine that the overcurrent does not flow in the load 300 when the detected temperature value is lower than the threshold temperature, and may determine the normal operation state of the circuit breaker 10 as a closed state. At this time, the current open / close state of the normally open circuit breaker 10 may be a closed state, or the current open / close state of the circuit breaker 10 in which the failure has occurred may be open.

On the other hand, if the detected temperature value is equal to or higher than the threshold temperature, the diagnosis unit 130 determines that the overcurrent flows in the load 300 and determines that the circuit breaker 10 is in the open state. At this time, the current open / close state of the normally open circuit breaker 10 is open, but the current open / close state of the circuit breaker 10 in which the failure has occurred may be a closed state.

Accordingly, when the normal operation state matches the current operation state, the diagnosis unit 130 diagnoses the circuit breaker 10 to be in a normal state, and if the normal operation state and the current operation state are different, the breaker 10 can be diagnosed as a faulty state have.

As described above, according to the present invention, it is possible to determine whether the circuit breaker is malfunctioning by comparing the normal open / close state of the circuit breaker identified through the thermal image of the circuit breaker with the current open / close state.

The control unit 140 receives information on the failure of the circuit breaker 10 from the diagnosis unit 130 and generates a control signal according to the failure of the circuit breaker 10 and provides the control signal to the circuit breaker 10 . Here, the control signal may be a signal for controlling the opening and closing of the circuit breaker 10.

The control unit 140 may generate a control signal and provide the generated control signal to the circuit breaker 10 when the circuit breaker 10 is diagnosed as a failure. In other words, the control unit 140 can generate the control signal only when the breaker 10 is diagnosed as a failure state without generating the control signal when the breaker 10 is diagnosed as a normal state.

When the control signal is provided to the circuit breaker 10, the circuit breaker 10 can perform an opening / closing operation according to the control signal.

The control signal may include an open control signal and a closed control signal. Here, the open control signal may be a signal for controlling the current open / close state of the circuit breaker 10 to an open state, and the close control signal may be a signal for controlling the current open / close state of the circuit breaker 10 to a closed state.

The control unit 140 may provide an open control signal to the circuit breaker 10 when the circuit breaker 10 is in the normal operation state and the current operation state of the circuit breaker 10 is in the closed state.

Alternatively, the control unit 140 may provide a close control signal to the circuit breaker 10 when the circuit breaker 10 is in the closed state and the circuit breaker 10 is in the open state.

As described above, the present invention assists opening and closing operations of the circuit breaker based on the temperature detected through the thermal image of the circuit breaker, thereby preventing overcurrent generation and power supply interruption due to malfunction of the circuit breaker.

That is, when a signal for controlling opening and closing of the relay in the circuit breaker is not properly applied (relay malfunction), the present invention can generate a control signal and provide the control signal to the circuit breaker so that the circuit breaker can operate normally again.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

Claims (11)

An apparatus for assisting opening and closing of a circuit breaker connected between a system and a load,
A material identification unit for obtaining a visible image of the circuit breaker using a light source and identifying a material photographed on the visible image based on the color data represented in the obtained visible image;
An image corrector for obtaining a thermal image for the breaker and correcting the thermal image based on the emissivity of the identified material;
A diagnostic unit for diagnosing whether the breaker is faulty by comparing a normal operation state of the breaker based on a temperature value detected in the corrected thermal image and comparing the identified normal operation state with a current operation state of the breaker, ; And
And a control unit for generating a control signal according to whether the breaker is faulty or not and for providing the generated control signal to the breaker
Breaker switchgear.
The method according to claim 1,
Wherein the substance identifying section identifies a material photographed at each coordinate of the visible image based on color data detected at each coordinate of the visible image.
3. The method of claim 2,
Wherein the color data is at least one of RGB data, CMY data, HSV data, YUV data, and CMYK data.
The method according to claim 1,
Wherein the substance identifying unit identifies the photographed material at each coordinate of the visible image,
Wherein the image corrector corrects the thermal image corresponding to each coordinate of the visible image based on the emissivity of the identified material.
The method according to claim 1,
Wherein the image corrector determines the emissivity of the material identified at each coordinate of the visible image by referring to the memory and corrects the color data for each coordinate of the thermal image based on the determined emissivity.
The method according to claim 1,
Wherein the substance identifying unit detects a color change rate of the visible image according to the movement of the light source,
Wherein the image corrector determines the emissivity of the material based on the color change rate of the material and the visible image captured in the visible image.
The method according to claim 6,
Wherein the image corrector determines the emissivity range of the material photographed in the visible image with reference to the memory and determines the emissivity included in the emissivity range based on the color change rate.
The method according to claim 1,
Wherein the coordinates of the visible image with respect to one point of the breaker and the coordinates of the thermal image are the same.
The method according to claim 1,
Wherein the diagnosis unit identifies a maximum temperature value among the temperature values detected in the corrected thermal image and identifies a normal operation state of the breaker based on the identified maximum temperature value.
The method according to claim 1,
Wherein the diagnosis unit diagnoses the breaker to a steady state when the normal operation state matches the current operation state and diagnoses the breaker to a fault state if the normal operation state and the current operation state are different.
The method according to claim 1,
Wherein the controller generates the control signal when the breaker is diagnosed to be in a fault state, and provides the generated control signal to the breaker.

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