KR20230062933A - junction box for solar power Monitoring system and method - Google Patents

Abstract

The present invention relates to an infrared camera that expands the surveillance range of a junction box by increasing the angle of view of a camera lens and, specifically, to provide technology for monitoring a junction box by narrowing the focal length of a camera lens in order to secure a wide range of images of a solar junction box or electric switchboard through an infrared camera. The infrared camera includes a camera lens module consisting of a lens housing and a main frame.

Description

Infrared camera that expands the surveillance range of the junction box by increasing the angle of view of the camera lens {junction box for solar power monitoring system and method}

The present invention relates to an infrared camera that expands the monitoring range of a junction box by increasing the angle of view of a camera lens. Provides a technique for monitoring the access box by narrowing it down.

In general, a solar junction box is a device that collects DC current generated from a plurality of solar cell modules included in a photovoltaic power generation system and outputs it to an inverter included in the photovoltaic power generation system.

Such a solar connecting board is composed of an input terminal, a fuse, a diode, and an output terminal.

In such photovoltaic power generation, an inverter converts direct current generated from solar panels into alternating current and supplies it to each customer.

In addition, a monitoring function is provided to determine whether the entire photovoltaic power generation system is normal in a control room or the like.

This monitoring system designates a group in a solar panel composed of a plurality of solar cells, has a communicator for each group or for each cell, and monitors the presence or absence of abnormalities in the management server through the communicator.

In addition, the connection panel is equipped with a flame detection sensor to detect the presence or absence of fire. That is, there is a risk of fire when the connection board is overloaded due to excessive power generation of solar power generation, so a flame detection sensor is installed to detect a fire when it occurs.

Among these fire detection devices, heat detectors include a bimetal type, a heat semiconductor type, and a thermocouple type. There are photoelectric and ionization type smoke detectors.

In addition, if a fire breaks out in the switchboard, an automatic fire hydrant is installed for suppression.

In this state, if a fire occurs in the junction panel for various reasons, the fire detection sensor detects the fire through the control device and proceeds with fire suppression with a fire hydrant.

However, no matter how much fire extinguishing fluid is sprayed during the suppression process, it cannot be suppressed.

This was confirmed by the present inventors through experiments, and the reason for the suppression failure is that since the power generated from the solar panel is dc power and the power is continuously output through connection, sparks are continuously generated and sparks caused by the sparks It was connected to a fire and there was a problem with fire suppression. Eventually, the entire interior of the junction box was completely destroyed.

In an amount to prevent such a problem, the registration number 10-1298559 registration date August 14, 2013, the solar cell panel monitoring device equipped with a flame detector,

Since it is described in detail, description of a specific configuration is omitted.

Briefly, it provides a solar cell panel that can easily detect sparks on the connection plate and can quickly identify and maintain the solar cell panel, but this also causes a fire on the connection plate. If it does, sparks are continuously generated in the connecting plate, making it impossible to extinguish the fire.

In addition, the conventional connection board (including transmission board) generally detects the cause of fire by a sensor that detects the internal temperature of the connection board, and the location of the sensor is positioned so as to protrude from any part of the connection board.

As a result, there is a problem in that when a fire occurs at a location greater than a certain distance from the detection sensor (short distance that the detection sensor can quickly detect), it is detected after the flame progresses.

2. Also, it may vary depending on the region and installation location, but it often happens that the internal temperature of the junction panel reaches 60℃ in summer, and in this case, there is a problem that the temperature monitoring sensor malfunctions.

3, if we explain the conclusion here,

The prior art for monitoring the fire inside the junction box by the temperature sensor and extinguishing the fire

Since the inside of the junction box is the same as a system that is suppressed after being burnt down, it is useless to apply these technologies to the junction box.

Finally, registration number 10-1169289 registration date July 23, 2012 As can be seen in the title of the invention, the solar panel connection board and its control method, the power output from the input terminal 210 is passed through the circuit It is output to the switch unit 230, and the switch unit 230 is configured to output power to the diode 240 and the output terminal 250 as needed.

As a result, since all of the power output from the input terminal 210 passes through the switch unit, an arc is generated at the contact portion of the switch unit 230, and the arc develops into a spark and burns the entire connection board.

In addition, such an access panel does not provide a system that informs the replacement time of the access panel, so there may be cases where it is used until it leads to a fire.

Here, in the conventional configurations, when the temperature monitoring sensor malfunctions, it can be recognized as a fire, so there is a problem in that unnecessary power is cut off or malfunction can lead to a fire.

In view of the problems of the prior art, the present invention relates to an infrared camera that expands the surveillance range of the junction box by increasing the angle of view of the camera lens. Provides a technology to monitor the junction box by narrowing the focal length of the lens,

In addition, when a fire detection signal is generated inside the junction box through the fire detector, an infrared camera is used outside the junction box to check whether there is a fire hazard, and to transmit fire risk information to the manager to take action. .

1 is an exploded perspective view showing a camera lens module 200 according to an embodiment for explaining the present invention. As shown in FIG. 1 , a camera lens module 200 includes a lens housing 201 and a main frame 202 .

The lens housing 201 is equipped with a lens (not shown) and an infrared filter (not shown), and has a male screw thread 211 formed on its outer circumferential surface.

In addition, an image sensor (not shown) is mounted on the main frame 202, and a hole 221 capable of accommodating the lens housing 201 is formed in the center. The hole 221 has a female thread 223 formed on its inner circumferential surface to engage with the male thread 211 of the lens housing 201 . Therefore, while the male thread 211 and the female thread 223 are engaged and rotated, the lens housing 201 may be moved in the optical axis direction to adjust the distance from the image sensor. Due to this, the camera lens module 200 sets the distance between the lens and the image sensor according to the back focal length, which is a unique value of the lens mounted in the lens housing 201 .

As described above, it relates to an infrared camera that expands the monitoring range of the junction box by increasing the angle of view of the camera lens, and in detail, it is possible to secure a wide range of images of a solar junction box or an electric switchboard through the infrared camera.

Furthermore, when a fire detection signal is generated inside the junction box through the fire detector, an infrared camera is used from outside the junction box to check whether there is a fire hazard, and to transmit fire risk information to the manager to take action. Double monitoring cuts off unnecessary power or lowers the probability of fire due to malfunction.

1 and 2 are exploded perspective views illustrating a camera lens module according to an embodiment for explaining the present invention.
3 is a configuration diagram showing an infrared thermal imaging fire detector according to a preferred embodiment of the present invention;
4 is a configuration diagram showing a control unit of an infrared thermal imaging fire detector according to a preferred embodiment of the present invention;
5 is an infrared thermal imaging fire detector according to a preferred embodiment of the present invention
A flow chart showing the fire detection method used.
6 is a perspective view of a system of another embodiment of the present invention;
7 is an explanatory diagram according to the embodiment of FIG. 6;
Fig. 8 is an enlarged view of a main part of the figure;

The present invention will be described with reference to drawings for explaining an infrared thermal imaging fire detector and a fire detection method using the same according to embodiments of the present invention.

The heat haze temperature value described later is each terminal installed inside the junction box 10 or each

It refers to the temperature value generated in the plurality of circuits 20a.

The junction box described below refers to a junction box (including an ESS junction box) that receives power from a solar power plant and outputs it to a load through an inverter.

Another configuration is a plurality of circuits 12 connected through a measurement unit 13 and a control unit 14 that measure temperature values (by temperature sensors) or current and voltage values 14 installed inside the box 10. A control unit 14 that detects the temperature value of the circuit 12 and processes the sensed value.

Install an infrared camera 112 that monitors infrared rays corresponding to the internal temperature value of the junction box 10 from the outside of the junction box 10, but the infrared camera 112 is guided by the horizontal rail 20 to move power While moving horizontally by means 30, in a state of being mounted on an elevator 40 that goes up and down by power shifter 30

Through the measuring unit 13, the plurality of connection panels 10 respectively configured inside the plurality of

When a temperature higher than the preset temperature value occurs in any one of the circuits 20a of the circuits 12, the elevator 40 guided to the horizontal rail 20 according to the set control signal among the plurality of connection panels 10 In the direction of the junction box (10) where the set temperature has risen

While the infrared camera 112 mounted on the elevator 40 moves up or down after or during the movement of the plurality of junction boxes 10 in the horizontal direction (corresponding to the horizontal direction) by the power transfer means 30, After moving to the junction box 10 where the set temperature has risen, the junction box 10 where the set temperature has risen is photographed and the photographed image is notified to the outside through the control unit 130 and the transmitter 140 if the captured image is higher than the set temperature value. Characterized by composition.

The transmitting unit transmits wirelessly using an LTE wireless room.

An embodiment of driving according to the above configuration will be described.

It is desired to monitor a plurality of junction boxes while moving the infrared camera 112 around.

As described above, the plurality of junction boxes 10 are vertically or horizontally spaced apart from each other by a predetermined distance and installed on a separate support frame 1,

The infrared camera 112 is mounted on an elevator 40 that moves up and down by a first motor 41 in a state in which the infrared camera 112 looks at the plurality of connection boxes 10, and the elevator 40 The elevator 40 is installed inside the plurality of junction boxes 10 in a state where the elevator 40 is guided by the horizontal rail 20 that moves horizontally by the second motor 42, and a plurality of circuits 12 and electronic electric devices (2) to monitor.

An infrared camera 112 is installed in front of the plurality of junction boxes for checking internal conditions of the plurality of junction boxes through the infrared camera 112, and the infrared camera 112 is left and right by separate operation buttons (not shown). capable of moving up or down

It can be moved by an elevating device (not shown).

First, for reference, a commercially available infrared camera is mounted on the elevator 40 of the present application to move the infrared camera up and down.

The infrared camera is composed of a rotor rotating at a predetermined angle (a commercially available product configured in a rotating camera, not shown) and an infrared camera connected to a rotating shaft of the rotor.

Next, the mobile device will be described in detail (see also).

Configuration, the elevator 40 includes a rotor 4a that is erected vertically and rotated by a first motor 41, and an elevating member 40b that moves up and down by being screwed to the rotor 40a by a screw (screw spiral). And, a guide part 40c for guiding the elevating member 40b, and an infrared camera 112 mounted on the elevating member 40b and moving up and down.

An example of such a configuration is as follows.

As shown, the elevating member 40b moves up and down by the rotor 40a rotated by the first motor 72 while being guided by the guide part 40c.

Therefore, when the rotor 40a rotates, the elevating member equipped with the infrared camera 112

(40a) is going up and down. This makes it possible to monitor the junction box 10 .

Next, we want to move the moving device horizontally.

The elevator 40 is configured to move by the moving power means 30 by guiding the horizontal rail 20 (see also).

In the horizontal rail 20, a rotating means 30a rotated by a second motor 42 is installed long in the longitudinal direction of the horizontal rail 20, and

The rotating means 30a is rotated by the second motor 42 to horizontally move the elevator 40 coupled with the rotating means 30a by screw (screw spiral).

The temperature sensor of the present invention converts the resistance change into temperature data, and outputs the converted temperature data as a digital signal.

Next, the infrared camera 112 will be described.

The infrared thermal imaging fire detector 100 according to a preferred embodiment of the present invention includes a photographing unit 110, a memory unit 120, a control unit 130 and an alarm unit 140.

The photographing unit 110 is composed of a camera for photographing a fire monitoring range (corresponding to a junction box), and includes an infrared camera 112.

In addition, the infrared camera 112 may capture infrared images of the plurality of connection boxes 10, and the infrared images are transmitted to the controller 130.

The photographing unit 110 further includes a camera driving unit (not shown) capable of controlling the focusing and tracking operations of the infrared camera 112 under the control of the controller 130, so that zoom-in is free while measuring a long distance. It is easy for the manager to visually determine whether or not there is a fire in the future.

The memory unit 120 stores infrared images transmitted from the photographing unit 110 under the control of the controller 130,

The temperature value of the heat haze before the fire following the occurrence of the fire and a number of heat haze patterns corresponding to the heat haze (refer to the Korean dictionary) are stored.

Here, the temperature value of the heat haze refers to the minimum value among the temperature values measured from the heat haze when a fire occurs, and the temperature value of the heat haze is preferably measured by the bolometer sensor 170.

Meanwhile, the control unit 130 extracts a temperature value from the infrared image transmitted from the photographing unit 110, compares and analyzes the extracted temperature value with the heat haze temperature value stored in the memory unit 120,

The junction box 10 monitors electronic electrical equipment.

That is, the control unit 130 includes a detection unit 132, a comparison unit 134, an extraction unit 136, and a determination unit 138, and determines whether a fire has occurred.

First, the detection unit 132 converts the infrared image transmitted from the photographing unit 110 into an image, and detects a temperature value for each coordinate of the image so that the temperature value measured in the image can be histogrammed.

Here, the coordinates of the image are signals generated from the address counts of rows and columns in a memory access method, and refer to the point where the X and Y axes intersect. It means pixel (pixel, pixel [picture element]).

Also, the comparison unit 134 compares the coordinate temperature values detected by the detection unit 132 with the temperature values of the haze stored in the memory unit 120 .

At this time, the haze temperature value and the coordinate temperature value use a bolometer (170) that can measure the change in resistance according to the change in temperature measured as infrared wavelengths by a small amount of radiant energy are incident, but the change in bolometer resistance Since is small, it is preferable that the bolometer 170 can amplify and measure the change in resistance.

Referring to FIG. 3 , the bolometer 170 is a kind of infrared sensor, and when infrared rays emitted from an object are absorbed and converted into thermal energy, a change in electrical resistance due to the resulting temperature rise is measured, thereby measuring the change in electrical resistance of the object. It has a characteristic that can sense the temperature of the surface of an object without direct contact.

In addition, since the bolometer 170 uses radiant heat, the temperature can be measured with a resistance value measured even at long and short distances.

In particular, the bolometer 170 uses a wavelength of infrared energy in a wavelength range of 8 to 14 μm where thermal energy is least absorbed.

That is, when the bolometer 170 uses the 8-14um wavelength band, in terms of the energy emission characteristics of the object to be observed, the radiant energy for each wavelength of the object at room temperature is generally large, and sand dust, flashing light, and smoke This is because the transmittance characteristics are good even under such conditions.

In addition, since the resistance value by the infrared energy incident on the bolometer 170 is minute, the resistance value is amplified to widen the range for each detected temperature value, and the comparison unit 134 compares the coordinate temperature value with the haze temperature value. becomes easier

When the comparator 134 compares the haze temperature value with the coordinate temperature value, the extraction unit 136 extracts only the coordinates corresponding to the coordinate temperature value that is equal to or higher than the haze temperature value so that non-fire warnings can be excluded.

That is, when a fire occurs, the extraction unit 136 extracts only coordinate values corresponding to coordinate temperature values that are equal to or higher than the minimum heat haze temperature value among the temperature values measured from the fire, so noise, that is, non-fire alarm is extracted. can be excluded as much as possible, and the occurrence of a fire can be accurately determined later.

The determination unit 138 analyzes a pattern in which the coordinate values extracted by the extraction unit 136 change, and determines whether a fire has occurred.

That is, the determination unit 138 analyzes the coordinate value pattern in which the coordinate value extracted as the minimum value changes, and then compares the coordinate value pattern with a plurality of haze patterns stored in the memory unit 120. At this time, the determination unit 138 determines that a fire is likely to occur if the coordinate value pattern coincides with any one heat haze pattern.

In addition, the determination unit 138 may determine that a fire is likely to occur if the coordinate temperature value matches the heat haze temperature value of a fire caused by a fire stored in the memory unit 120 .

In addition, the determination unit 138 may finally determine the possibility of a fire if the coordinate value pattern coincides with any one heat haze pattern and the coordinate temperature value coincides with the heat haze temperature value of a fire.

Meanwhile, the alarm unit 140 outputs a warning sound or a warning message under the control of the control unit 130 when the determination unit 138 of the control unit 130 determines that a fire has occurred in the fire monitoring range.

The infrared thermal imaging fire detector 100 according to the present invention further includes a GPS chip 160, a transmitter 150, and a fire receiver 200.

The GPS chip 160 is built into the infrared camera 112 and transmits information on the location where the infrared camera 112 is installed.

When the control unit 130 determines that a fire has occurred in the fire monitoring range, the transmission unit 150 stores the location information of the infrared camera 112 transmitted by the GPS chip 160 and a fire warning text message in the memory unit 120 in advance. It can be sent to the mobile phone number of the administrator.

In the fire receiving panel 160, when the control unit 130 determines that a fire has occurred in the fire monitoring range, a fire detection signal including a video signal signal 154 and a relay contact signal 152 is transmitted from the transmission unit 150, and infrared rays at camera 112

An infrared image is transmitted to a video output comprising a serial image output 156 and an RF wireless communication output 158.

In addition, the fire receiving panel 200 includes a display unit 210.

The display unit 210 outputs an infrared image transmitted from an infrared camera 112 to a video output including a serial image output 156 and an RF wireless communication output 158 on one side of the fire receiving panel.

That is, the manager can visually determine whether or not a fire has occurred while viewing an infrared image on the display unit 210 of the fire receiving panel 200 .

In the fire detection method using the infrared thermal image fire detector 100 according to a preferred embodiment of the present invention, first, the photographing unit 110 including an infrared camera 112 for photographing the junction box 10 as an infrared image is The infrared image captured by the camera 112 is transmitted to the controller 130 (S100).

The photographing unit 110 is composed of a camera that photographs the fire surveillance range, and includes an infrared camera 112 .

In addition, the infrared camera 112 captures an infrared image of the junction box 10, and the infrared image is transmitted to the controller 130.

The photographing unit 110 further includes a camera driving unit (not shown) capable of controlling the focusing and tracking operations of the infrared camera 112 under the control of the controller 130, so that zoom-in is free while measuring a long distance. It is easy for the manager to visually determine whether or not there is a fire in the future.

Next, the infrared image transmitted from the photographing unit 110 under the control of the controller 130 is stored in the memory unit 120 (S200).

At this time, the memory unit 120 stores the infrared image transmitted from the photographing unit 110 under the control of the control unit 130, and stores the heat haze temperature value of the fire and a plurality of haze patterns caused by the occurrence of a fire. .

Here, the heat haze temperature value refers to the minimum value among the temperature values measured from the heat haze when a fire occurs, and the heat haze (flame) temperature value is preferably measured with a bolometer.

In addition, the control unit 130 extracts coordinate temperature values from the infrared image transmitted from the photographing unit 110 and stored in the memory unit 120, and the extracted coordinate temperature values and the memory unit 120 It compares and analyzes the heat haze temperature values stored in the system to determine whether or not a fire can occur.

At this time, the heat haze temperature value and the coordinate temperature value use a bolometer that can measure the change in resistance according to the change in temperature measured as infrared wavelengths by a small amount of radiant energy are incident, but the change in bolometer resistance is minute. do

Therefore, it is preferable that the bolometer 170 can amplify and measure the change in resistance.

Here, since the resistance value by the infrared energy incident on the bolometer 170 is minute, the resistance value is amplified, and the range for each detected temperature value is widened and converted. comparison becomes easier.

Here, the infrared thermal imaging fire detector 100 further includes a GPS chip 160, a transmitter 150, and a fire receiving panel 200.

The GPS chip 160 is built into the infrared camera 112 and transmits information on the location where the infrared camera 112 is installed.

When the control unit 130 determines that a fire has occurred in the fire monitoring range, the transmission unit 150 stores the location information of the infrared camera 112 transmitted by the GPS chip 160 and a fire warning text message in the memory unit 120 in advance. It is sent to the mobile phone number of the administrator.

Accordingly, the manager can easily grasp the occurrence of a fire through the fire warning text message received on the manager's mobile phone 220 .

In the fire receiving panel 160, when the control unit 130 determines that a fire has occurred in the fire monitoring range, a fire detection signal including a video signal signal 154 and a relay contact signal 152 is transmitted from the transmission unit 150, and infrared rays at camera 112

An infrared image is transmitted to a video output comprising a serial image output 156 and an RF wireless communication output 158.

In addition, the fire receiving panel 200 includes a display unit 210.

The display unit 210 outputs an infrared image transmitted from an infrared camera 112 to a video output including a serial image output 156 and an RF wireless communication output 158 on one side of the fire receiving panel.

Claims (2)

In the infrared camera that extends the surveillance range of the junction box,
The camera lens module 200 includes a lens housing 201 and a main frame 202,

The lens housing 201 is equipped with a lens (not shown) and an infrared filter (not shown), and a male thread 211 is formed on the outer circumferential surface,

An image sensor (not shown) is mounted on the main frame 202, and a hole 221 capable of accommodating the lens housing 201 is formed in the center. The hole 221 has a female thread 223 formed on its inner circumferential surface to engage with the male thread 211 of the lens housing 201.

Surveillance range of the connection box by increasing the angle of view of the camera lens, characterized by a configuration in which the male thread 211 and the female thread 223 are meshed and rotated to move the lens housing 201 in the optical axis direction to adjust the distance from the image sensor. An extended infrared camera.
According to claim 1
The junction box 10 is installed inside the junction box 10 through a measurement unit 13 and a control unit 14 that measure temperature values (by temperature sensors) or current and voltage values of a plurality of circuits 12 The controller 14 detects the temperature values of the plurality of circuits 12 and processes the sensed values.

Install an infrared camera 112 that monitors infrared rays corresponding to the internal temperature value of the junction box 10 from the outside of the junction box 10, but the infrared camera 112 is guided by the horizontal rail 20 to move power While moving horizontally by means 30, in a state of being mounted on an elevator 40 that goes up and down by power shifter 30

Through the measuring unit 13, the plurality of connection panels 10 respectively configured inside the plurality of
When a temperature higher than the preset temperature value occurs in any one of the circuits 20a of the circuits 12, the elevator 40 guided to the horizontal rail 20 according to the set control signal among the plurality of connection panels 10 In the direction of the junction box (10) where the set temperature has risen

While the infrared camera 112 mounted on the elevator 40 moves up or down after or during the movement of the plurality of junction boxes 10 in the horizontal direction (corresponding to the horizontal direction) by the power transfer means 30, After moving to the junction box 10 where the set temperature has risen, the junction box 10 where the set temperature has risen is photographed and the photographed image is notified to the outside through the control unit 130 and the transmitter 140 if the captured image is higher than the set temperature value. An infrared camera that expands the surveillance range of the junction box by increasing the angle of view of the camera lens, which is characterized by a configuration.

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