KR101996621B1 - Camera apparatus for furnace, converter and hub system therefor - Google Patents

Abstract

The present invention discloses a brazier camera device having excellent durability and heat resistance and arranged so that the camera module is adjacent to the brazier. The furnace camera apparatus may be controlled by a hub system consisting of a converter and a central station.

Description

Camera apparatus for furnace, converter and hub system therefor}

The present disclosure relates to a brazier camera device, a converter and a hub system for the same.

In general, the types of industrial furnaces are classified into various types depending on the products produced. For example, there are industrial incinerators for incineration of wastes, steel mill furnaces used to dissolve metals, gas furnaces used to dissolve glass, cement furnaces, ceramics furnaces, and kilns.

One of the common needs of users in these types of furnaces is whether the inside of the furnace can be observed from time to time with clean images. Since the furnace starts to operate once, it operates continuously for a period of time unless a special failure occurs, so the inside of the furnace should be monitored from time to time to check the internal situation.

Furnace cameras are used to monitor the situation inside the furnace.

Korean Patent No. 467748, entitled “Internal Surveillance Vision Tube”, is equipped with a block lens that blocks the lens, and a small camera for capturing an image inside the furnace. Disclosed is a structure in which compressed air supplied from a box passes through the front part and is sprayed to the front part, and a handle for adjusting focus is provided at the front end of the small camera.

U.S. Pat.No. 6,229,563, entitled 'camera insertion into a furnace', has a monitor mounted on a worker's helmet with a camera mounted at the end of a lance held by the operator to monitor the furnace. Disclosed is a structure having a control device including a monitor and a recorder for allowing a worker to adjust the lance by making the camera image visible and communicating with the camera.

However, these patents disclose that the air-cooled or water-cooled fluid flow structure that cools the high temperature around the camera device is a fragmentary flow that does not sufficiently cool the internal parts including the camera, resulting in shorter device life, poor image quality, and often to cool the high temperature. There was a problem that the shooting must be stopped. In addition, a system including a central station for continuously monitoring and automatically controlling a photographed image of a camera is not disclosed. For example, there is a limit in supervising a large furnace process that is operated for 24 hours.

Applicant, in order to solve this disadvantage, in Korean Patent No. 1711373, in the furnace monitoring camera device 1 'shown in Figure 1, it is inserted into the observation hole (h') formed in the wall (W) of the furnace A tube 3 'into which an image is incident, a converter disposed at the rear end of the tube 3', a head mounted at the rear end of the converter, a lens assembly, and mounted inside the body 7 ', A camera 5 'for converting an image of an incident subject into image data, and a control board 16' mounted on the camera 5 'and controlled remotely can be disclosed.

The patent is advantageous in that there is no camera in the tube 3 'and the camera is spaced apart inside the hot furnace to prevent camera loss and increase the cooling effect. However, there is a burden of installing a part that transmits the light incident from the observation hall h 'to the camera, and as the camera moves away from the furnace, the optical path is precisely focused on the camera when the tube 3' moves. There is a limit that it is difficult to match.

Therefore, an object of the present invention is to provide a furnace camera device for acquiring an accurate image, excellent heat resistance and durability, and easy to manufacture and install.

An object of the present invention is to provide a brazier camera device that is excellent in cooling and thermal insulation effect and that is easily operated by a camera.

An object of the present invention is to provide a user-centered converter and hub system that can control a furnace camera device and enables bidirectional communication.

In order to achieve the above object, a camera apparatus for a furnace according to an embodiment of the present invention comprises: a tube assembly incorporating a camera; A tunnel internal installation structure for mounting the tube assembly in a tunnel of a furnace wall; A guide device comprising a guard rail for guiding the tube assembly outside the tunnel; And a temperature control device for cooling the tube assembly, wherein the camera discloses a camera apparatus for a brazier disposed adjacent to the center of the brazier in the furnace wall.

In addition, a furnace camera apparatus according to an embodiment of the present invention includes: a tube assembly, the tube assembly, the longitudinally extending primary housing, which forms the outer frame of the tube assembly; A secondary housing having a diameter smaller than the primary housing in a longitudinally extending columnar shape, constituting the inner frame of the tube assembly; And a camera module installed inside the secondary housing, the camera module including an inner case having a camera and a rod extending in a horizontal direction from the camera, wherein the camera is disposed adjacent to the center of the furnace in the furnace wall. Disclosed is a hearth camera device.

According to an embodiment of the present invention, the camera module may further include an outer case disposed between the outside of the inner case and the secondary housing.

According to an embodiment of the present invention, the camera is an electric camera capable of remote driving, the camera module further comprises a camera control unit, the rod may connect the camera and the camera control unit.

According to one embodiment of the invention, it may further comprise a tunnel installed penetrating from the furnace wall inlet to the outlet facing the furnace, and a casing provided between the inside of the tunnel and the outside of the primary housing of the tube assembly.

According to an embodiment of the present invention, the guide rail extending in the horizontal direction at the inlet of the furnace wall and a rolling roller mounted on the guide rail and connected to the outer surface of the primary housing, the rolling roller is left and right on the guide rail You can go to

According to an embodiment of the present invention, the first fluid inlet is provided on the outer surface of the casing, the second fluid inlet is provided on the outer surface of the primary housing, the cooling fluid flowing through the primary fluid inlet is casing and primary The cooling fluid flowing through the space between the housing and forward and flowing through the secondary fluid inlet may flow through the empty space inside the secondary housing and through the camera module.

According to one embodiment of the invention, it may further include a heat insulating material embedded between the primary housing and the secondary housing.

According to another embodiment of the present invention, a converter capable of simultaneously or separately controlling one or more furnace camera devices by wired or wireless connection with the furnace camera device, the converter comprising: a control unit, a guardrail driving unit, A converter including a temperature controller drive unit, a camera drive unit, a display unit, a receiver unit, and a communication unit is disclosed.

According to another embodiment of the present invention, the guardrail driving unit may move the tube assembly from side to side based on the transmission signal of the controller.

According to another embodiment of the present invention, the temperature control device may supply cooling fluid to at least one or more fluid inlets.

According to another embodiment of the present invention, the camera driver may perform the forward, backward and rotation operations and / or zoom in and zoom out functions of the camera based on the transmission signal of the controller.

According to another embodiment of the present invention, the display unit may display an image captured by the brazier camera device based on the signal transmitted from the controller.

According to another embodiment of the present invention, the video is displayed in real-time streaming video, the video output is a transport video interface (TVI), analog high definition (AHD), composite video interface (CVI), composite video blanking (CVBS) and sync) and IP (internet protocol) schemes.

According to yet another embodiment of the present invention, there is provided a hub system for centrally controlling a furnace camera device, wherein the hub system is connected to the furnace camera device by wire or wirelessly to simultaneously or separately connect one or more furnace camera devices. Converter can be controlled by; And a central station configured to bidirectionally communicate with the one or more converters, wherein the central station initiates a hub system that receives a video in a brazier captured by a camera of a brazier camera device through a converter and displays the image in a monitor in real time. .

According to another embodiment of the present invention, the converter and the central station of the hub system are one of the following functions: (a) The converter has active control over the furnace camera device, and the central station controls the converter. (B) the converter receives the information of the brazier camera device and transmits it to the central station, the central station transmits the necessary control commands to the converter, and the converter uses the brazier based on the received commands. Controlling the camera or (c) the converter and the central station can be performed in parallel to actively control the furnace camera device.

According to another embodiment of the present invention, the central station may drive a camera provided in the furnace camera apparatus, or control ON / OFF of the cooling device provided in the furnace camera apparatus.

According to an embodiment of the present invention, since the camera is installed as close to the center of the furnace as possible, more accurate images can be obtained, and the tube assembly can be mass-produced in a compact and compact module.

According to one embodiment of the present invention, since the shielding structure is multi-blocking heat of the furnace, it is possible to protect the components from the furnace high temperature, to prevent deformation and loss due to heat, and to improve the durability.

According to one embodiment of the present invention, it is possible to control the brazier camera device and to check and manage the overall plant situation, which is safe, efficient and contributes to process automation.

1 is a view of a brazier monitoring camera device of the prior art.
2 is a side cross-sectional view of a furnace camera apparatus according to an embodiment of the present invention.
3 is a side cross-sectional view of adding a temperature control device to the furnace camera device of FIG.
Figure 4 is a perspective view showing the outside of the tube assembly and the casing according to an embodiment of the present invention.
5 is a configuration diagram of a converter for controlling a camera apparatus for a furnace according to an embodiment of the present invention.
6 is a block diagram of a hub system of the present invention.

Some embodiments of the invention will now be described in detail with reference to the accompanying drawings. In adding reference numerals to the elements of each drawing, it should be noted that the same elements are designated by the same reference numerals as much as possible even though they are shown in different drawings. In describing the present embodiment, when it is determined that a detailed description of a related well-known configuration or function may obscure the gist of the present embodiment, the detailed description thereof will be omitted.

In describing the components of the present embodiment, symbols such as first, second,?),?), A), and b) may be used. These symbols are only to distinguish the components from other components, and the nature, order or order of the components are not limited by the symbols. In addition, when a part of the specification is said to include or include any component, this means that it may further include other components, except to exclude other components unless expressly stated to the contrary. do. In addition, the term 'connection', 'installation' or 'attachment' in the specification does not only mean direct connection or direct installation or attachment between components, but also includes connection, installation or attachment through indirect or other components. As broadly as possible.

2 is a side cross-sectional view of the furnace camera apparatus 1 according to the embodiment of the present invention.

The furnace camera device 1 includes a tube assembly 2, an installation structure for mounting the tube assembly 2 in the tunnel T, a guide device for guiding the tube assembly 2 outside the tunnel T, And a thermostat to cool and insulate the tube assembly 2.

1. Tube assembly

The tube assembly 2 is largely provided with the camera module containing a lens group, and the housing which protects a camera.

Specifically, the tube assembly 2 comprises a primary housing 4 extending longitudinally, which forms the outer frame of the tube assembly 2. The front end 4a of the primary housing 4 is bent downward to close a part of the tube assembly 2, the rear end 4c is closed at its entire surface, and the front end 4c is provided with a partition 4b at the rear end 4c. The space 4s is formed between and. The camera control unit 10c described later may be installed in the space 4s.

The secondary housing 6 is shorter in diameter and length than the primary housing 4 in a column shape extending in the longitudinal direction forming the inner frame of the tube assembly 2. The front end 6a of the secondary housing 6 is folded to leave an opening for in-image imaging, and the rear end is hermetically closed to the partition 4b by the plug 24. About half of the length of the primary housing 4 and the secondary housing 6 is installed in the furnace wall inner tunnel T.

Camera module according to an embodiment of the present invention is installed in the secondary housing (6). The camera module includes an outer case 8, an inner case 10 having a built-in camera 12, and a rod 20 extending in the horizontal direction from the camera 12 to the space 4s. It is preferable that an opening is formed in the rear surface 8a of the outer case 8 so that a cooling fluid flows to cool the inside as described later.

Unlike the Korean Patent No. 1711373, the camera 12 is disposed adjacent to the center of the furnace in the housing inside the furnace wall W. Since the camera 12 is protected by at least the primary and secondary housings 4 and 6 and the outer and inner cases 8 and 10, the camera 12 is excellent in heat resistance and fire resistance and can prevent deterioration and deformation of parts. It is preferable to heat-treat the lens of the camera 12 and to add a filter in front of the lens to protect the lens.

Camera 12 according to an embodiment of the present invention may be a remote-driven electric camera. To this end, a cable (not shown) is mounted inside the rod 20 to connect the camera 12 and the camera controller 10c. The camera 12 may receive a driving signal from the camera controller 10c to perform forward, backward and rotation operations, zoom in, and zoom out functions.

Since the camera 12 is installed as close to the center of the furnace as possible, a more accurate image can be obtained. Further, due to the reduction in the length of the tube assembly 2, the tube assembly 2 can be mass-produced in a compact and compact module.

Reference numeral 18 is a data input / output port for communicating with the camera control unit 10c.

2. Installation structure inside the tunnel

Next, the internal structure of the tunnel T of the tube assembly 2 according to the embodiment of the present invention described above will be described.

First, the tunnel T penetrates from the inlet of the furnace wall W to the outlet facing the core part of the furnace. The tunnel T has a cross-sectional area that can sufficiently accommodate the tube assembly 2. The rear end of the tunnel T is divided into a flange T1 extended outward and a flange T2 having a diameter slightly larger than the flange T1, and the flanges T1 and T2 are fastened to a fastening member 200 such as a bolt. Fasten tightly over the inlet of the furnace wall (W) through).

A casing 40 is provided between the inside of the tunnel T and the outside of the tube assembly 2 to protect the tube assembly 2. The cross section of the casing 40 is larger than the tube assembly 2, but the length is made somewhat shorter. The casing 40 is installed radially spaced apart from the primary housing 4 so as to provide a space through which the cooling fluid flows.

The front surface 40a of the casing 40 is folded to form an opening in the front, and the rear surface 40b is closed by the clamp 22 surrounding the outer surface of the primary housing 4.

The casing 40 has been described in the installation structure inside the tunnel T for convenience, but may be treated as a configuration included in the tube assembly 2. In this case, the casing 40 may be manufactured in a structure detachable from the outside of the primary housing 4 or may be integrated into the primary housing 4 by welding or the like.

The above-described tunnel internal installation structure not only sufficiently protects the tube assembly 2 from external force and high temperature, but also allows the quick and easy operation of mounting the tube assembly 2 in the tunnel T and detaching it from the tunnel T. Make sure

3. Tunnel external guide device

Next, the tunnel T external guide device of the tube assembly 2 according to the embodiment of the present invention described above will be described.

The tunnel T external guide device includes a guide rail 34 extending in the horizontal direction from the flange T2 and a suspension cable 38 mounted on the guide rail 34 to the outer surface of the primary housing 4. And a pair of rolling rollers 36 connected to the tube assembly 2 via. The rolling roller 36 is movable from side to side on the guide rail 34.

The rail controller 50 may be installed at the rear end of the guide rail 34. The rolling roller 36 automatically moves forward or backward by the operation of the rail controller 50. Alternatively, an operator may manually move the rolling roller 36 or the primary housing 4 to move the tube assembly 2 from side to side. In this way the tube assembly 2 further enters into the furnace wall W, is spaced apart from the furnace core or separated from the furnace wall W. Thus, the installation, movement, manipulation and disassembly of the tube assembly 2 is easy.

4. Thermostat

The temperature control device according to an embodiment of the present invention includes a cooling device and a heat insulating device. 3 is a side cross-sectional view in which a temperature adjusting device is added to the furnace camera device 1 of FIG. 2 for convenience of description.

First, the cooling device includes a primary fluid inlet 14 installed on the outer surface of the casing 40 and a secondary fluid inlet 16 installed on the outer surface of the primary housing 4. The fluid can be pressurized air or water.

Cooling fluid flowing through the primary fluid inlet 14 flows forward through the space between the casing 40 and the primary housing 4, as indicated by dashed lines in the figure, through the furnace h. Discharged. The cooling fluid flowing through the secondary fluid inlet 16 includes an empty space inside the secondary housing 6, an outer case 8 constituting the camera module, and a camera 12, as shown by a dotted line in the drawing. Passed between one inner case 10 is discharged through the brazier (h).

Cooling fluid flows into and out of the outer case 8 of the camera 12, thereby minimizing heat transferred to the inner case 10. The inner case 10 is finally radiated and cooled by the cooling fluid. The inner case 10 is completely waterproof and is designed to prevent impairment of camera functions and performances such as dirt, oil, and moisture contained in the cooling fluid.

Thus, the cooling device according to an embodiment of the present invention is characterized in that it provides a flow path that can evenly cool the entire space of the casing and the housing, and especially the inside and outside of the module housing the camera.

The heat insulating device of the present invention includes a heat insulating material 100 embedded between the primary housing 4 and the secondary housing 6. The heat insulator 100 may employ any existing one. The heat insulator 100 protects the camera 12 and the inner and outer cases 10 and 12 from the high temperature of the furnace.

According to one embodiment of the present invention, the heat of the furnace is cooled by the cooling fluid through the primary fluid inlet 14, blocked by the heat insulating material 100, and then cooled through the secondary fluid inlet 16. By taking the triple heat shield structure cooled by the fluid, it is possible to protect the components from the high temperature of the furnace, to prevent deformation and loss due to heat, and to improve the durability.

In addition, according to one embodiment of the present invention, in order to measure the temperature inside and outside the furnace camera 1, a temperature sensor is installed at a suitable place such as the guard rail 34, the primary and secondary housings 4, 6, and the like. Can be.

4 shows the exterior of the tube assembly 2 and the casing 40 according to one embodiment of the invention.

The exterior of the tube assembly 2 is surrounded by a primary housing 4, and a secondary fluid inlet 16 is formed. The casing 40 is separated from the tube assembly 2, and a primary fluid inlet 14 is formed on the outer surface.

<Control of Furnace Camera Unit>

5 is a configuration diagram of a converter C for controlling the furnace camera apparatus 1 according to the embodiment of the present invention. The converter C may be connected to the at least one furnace camera device 1 by wire or wirelessly to control a plurality of devices simultaneously or separately.

The converter C is designed to store and distribute information, such as an image from a camera, and to minimize a programmable logic controller (PLC), an inverter, an induced voltage, and electronic noise (noise) that interfere with the image.

The converter C may be installed in an application of a computer, a small workstation, or a smartphone, such as a PC, which is located outside the furnace camera apparatus 1.

The converter C includes a controller 300, a guardrail driver 310, a cooling device driver 320, a camera driver 330, a display 340, a receiver 350, and a communicator 360. do.

The guardrail driver 310 is connected to the rail controller 50 to drive the rail controller 50 based on the transmission signal of the controller 300 to move the rolling roller 36 to the left and right.

The cooler driver 320 is connected to a fluid controller (not shown) to drive the fluid controller based on the transmission signal of the controller 300 to supply fluid to the primary fluid inlet 14 or / and the secondary fluid inlet 16. Turn ON / OFF.

The camera driver 330 is connected to the camera controller 10C to drive the camera controller 10C based on the transmission signal of the controller 300 to perform forward, backward and rotation operations, zoom in and zoom out functions of the camera.

The display unit 340 is a screen captured by the furnace camera device 1 based on a signal transmitted from the controller 300, a temperature detected by a temperature sensor installed inside or outside the furnace camera device 1, and a guard rail ( 34) and various working conditions such as cooling device status are displayed on the monitor.

An image captured by the camera 12 may be displayed as a video of a real time streaming method. The video output may be output through a transport video interface (TVI), analog high definition (AHD), composite video interface (CVI) and composite video blanking and sync (CVBS) as well as an internet protocol (IP) scheme.

The color temperature can be detected through the screen displayed on the monitor or video, so that the numerical value can be displayed together.

The receiver 350 captures a screen shot by the camera device 1 from the camera controller 10c, a temperature detected by a temperature sensor installed inside or outside the camera device 1, the guard rail 34, and cooling. Various information such as device status is received and transmitted to the controller 300.

Any information transmission method such as a screen can be adopted, such as an optical cable, a wired cable, a wireless analog, or a wireless digital method, and these are controlled by a converting mix (frequency mixing) circuit.

The communication unit 360 is for transmitting a signal with the central station 502 described later.

Converter C according to an embodiment of the present invention described above, the one or more furnace camera device (1) can be directly controlled in the field and the operator can monitor the work situation.

According to another embodiment of the present invention, one or more converters C may be connected to the central station 502 and the central station 502 may be configured to serve as a control tower.

Figure 6 shows a schematic diagram of a hub system 500 of the present invention for this purpose.

The hub system 500 according to an embodiment of the present invention includes a central station 502 in communication with a plurality of converters (C).

The furnace camera device 1a is connected to the converter C1 by SD (standard definition), and the furnace camera device 1b, 1c is connected to the converter C1 by TVI, AHD, CVI or CVBS. The converter Cn connected to the other furnace camera is connected to the converter C1. The converters C1, Cn can communicate bi-directionally, wired or wirelessly, and in SD, high definition (IP) and IP.

The central station 502 is connected with the converters C1, Cn and bidirectionally communicates with the converters C1, Cn. The designated manager 504 is an authenticated manager and manages the entire central station 502 through unique authority. In the data storage unit 506, main information transmitted from the converters C1, Cn is recorded and stored.

FIG. 6 shows an example in which the in-hearth image I captured by the brazier camera apparatuses 1a, 1b, and 1c is transferred to the central station 502 through a converter and displayed on a monitor. The monitor displays the image I together with the numerical temperature value detected by the color temperature.

According to the hub system 500 of the present invention, it is possible to monitor and manage the overall plant equipment with a furnace. For example, the designated manager 504 may monitor images of all the furnaces and the cooling state in real time.

The roles of converters C1, Cn and central station 502 can be divided into the following three.

First, the converters C1, Cn are converters as shown in FIG. 5, which generally control the furnace camera device 1, transmit necessary information to the central station 502, and provide management instructions. Receive The central station 502 performs mainly information monitoring and recording functions, rather than directly controlling the brazier camera device 1.

Second, the converters C1, Cn receive the information of the brazier camera 1 and transmit the information to the central station 502. The central station 502 transmits all necessary control commands to the converters C1, Cn. The converters C1 and Cn control the furnace camera 1 based on the received command. The converters C1, Cn control the furnace camera 1 on the basis of the command of the central station 502, and act as a mediator of information rather than controlling the furnace camera 1 independently.

Third, the converters C1, Cn and the central station 502 simultaneously control the furnace camera 1 in parallel. For example, the converters C1, Cn and the central station 502 both drive the camera 12, control ON / OFF of the cooling device based on temperature information of the temperature sensor, or roll rollers 36 Can be moved. Alternatively, some of the control functions of the furnace camera 11 may be distributed so that the converters C1, Cn are dedicated, and some of the central station 502 is dedicated.

In factories including furnaces, it is important to note that the type of system actually applied is determined in consideration of the size of the plant, the number of furnaces, and the status of the plant.

The hub system 500 according to an embodiment of the present invention may be utilized when an abnormality occurs in the furnace camera 1 or when separation for cleaning is required.

For example, the camera 12 can be moved remotely from the central station 502 when an abnormality occurs when no fluid is supplied to the cooling device, and can be separated if the purpose of cleaning and maintenance occurs in the same way. .

As mentioned above, specific embodiments of the present invention have been described with reference to the accompanying drawings, but these are merely illustrative and do not limit the scope of the present invention, and various changes can be made to those skilled in the art.

It is apparent that the scope of the present invention extends to the same or similar area as the claims described below.

(1): camera unit for the furnace (2): tube assembly (4): primary housing
(6): secondary housing (8): outer case (10): inner case
(12): camera (34): guide rail (36): rolling roller (40): casing
(100): insulation (C): converter (300): control unit (500): hub system
(502): central station (504): designated administrator

Claims (8)

delete A hub system for monitoring and controlling a space in which a furnace camera device is installed, wherein the hub system is connected to each converter connected to the furnace camera device and bidirectionally communicates with each converter to monitor and control each camera device. Includes a central station,
The camera device comprises: a tube assembly, the tube assembly comprising: a primary housing elongated in the longitudinal direction, the outer frame of the tube assembly; A secondary housing having a diameter smaller than the primary housing in a longitudinally extending columnar shape, constituting the inner frame of the tube assembly; And a camera module installed inside the secondary housing, the camera module including an inner case having a camera and a rod extending in a horizontal direction from the camera, wherein the camera is disposed adjacent to the center of the furnace in the furnace wall. Become,
The camera device further comprises an outer case disposed between the outside of the inner case and the secondary housing of the camera module, the camera is a remotely driveable electric camera, the camera module further comprises a camera controller, The rod connects the camera and the camera control unit, and further includes a tunnel installed through the furnace wall inlet to the outlet facing the furnace, and a casing installed between the inside of the tunnel and the outside of the primary housing of the tube assembly. A guide rail extending in the horizontal direction at an inlet of the inlet, and a rolling roller mounted on the guide rail and connected to the outer surface of the primary housing, the rolling roller being movable left and right on the guide rail,
The converter includes a control unit, a guard rail driving unit for driving a guard rail for moving the camera device, a cooling device driver for driving a cooling device of the camera device, a screen photographed by the camera device, and an inside of the camera device. Or a receiving unit which receives information of a temperature, guard rail, and cooling device detected by an externally installed temperature sensor and transmits the information to a control unit.
The converter is in bidirectional communication with another converter,
Information of the converter is transmitted to the central station,
The central station includes a display for displaying all images captured by each camera device, such that a plurality of converters are connected to the central station and the central station serves as a control tower.
The converter and the central station of the hub system are one of the following functions: (a) The converter receives the information of the brazier camera device and sends it to the central station, and the central station sends the necessary control commands to the converter, The converter controls the furnace camera based on the received command or (b) the converter and the central station to actively control the furnace camera device in parallel. delete delete delete delete The method of claim 2,
It includes a primary fluid inlet provided on the outer surface of the casing, and a secondary fluid inlet provided on the outer surface of the primary housing, the cooling fluid flowing through the primary fluid inlet passes forward between the casing and the space of the primary housing forward And a cooling fluid flowing through the secondary fluid inlet flows forward through the camera module and the void inside the secondary housing. The method of claim 7, wherein
The hub system further comprising a thermal insulation embedded between the primary housing and the secondary housing.

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