Power transmission line video monitoring terminal adapted to severe rain and snow weather

Abstract

The invention discloses a power transmission line video monitoring terminal adapted to severe rain and snow weather, which comprises an upper cover and a lower housing in sealed connection, a camera is mounted in the lower housing, a centrifugal fan and an axial fan are arranged on the outer side of front glass of the camera, and the axial fan is located on the outer side of the centrifugal fan; the centrifugal fan is used for forming an air curtain on the surface of the front glass of the camera to blow away raindrops or snowflakes falling to a visual area of the camera, and an air blowing area of the centrifugal fan is larger than the visual area of the camera; the axial flow fan is used for generating outward airflow in front of the visual area of the camera and pushing raindrops or snowflakes to the outer side of the terminal. Strong airflow is adopted to disperse raindrops and snowflakes which shield the visual area of the front glass of the camera, high-quality collection of video images is guaranteed, and meanwhile the camera has good waterproof sealing performance.

Description

Technical Field

[0001] The invention relates to a power transmission line video monitoring terminal, in particular to a power transmission line video monitoring terminal adaptable to severe rainy and snowy weather. Background Art

[0002] Transmission line video surveillance terminals are usually installed on towers along the transmission lines. Affected by bad weather such as rain and ice, as well as dust and sand, the cameras of the video surveillance terminals will be blocked by rain, ice and dust, affecting the clarity and continuity of the collected video images, thereby reducing the accuracy and reliability of the online monitoring background data analysis, and may not be able to respond in time to take protective actions at critical moments.

[0003] In order to solve the problem of camera visible area occlusion and obtain good video image acquisition quality, the following two methods are currently used:

[0004] (1) Install a motor in the monitoring terminal and drive the wiper through the transmission shaft to clean the front glass of the camera. This solution specifically connects the motor, electronic controller and power adapter to the bottom wall of the device box, sets a transparent window on the outer surface of the box monitoring camera, and connects the motor output end to the wiper. The wiper rubber strip is in close contact with the outer surface of the transparent window. The motor drives the wiper to clean the camera's visible area (i.e., the transparent window) in time to prevent dust and rain accumulation.

[0005] The existing problems are: when the motor and the wiper shaft are in use, the motion bearing is long and needs to reciprocate within the travel angle range. Under long-term operating conditions, the structural parts are prone to wear and tear, especially the rubber strips on the wipers, which are at risk of aging and deformation. Secondly, since the shaft is a moving component and is close to the wiper on the outer wall of the lens, the waterproof sealing performance of the component structure is difficult to ensure. In addition, the sealing ring of the waterproof sealing structure of the shaft has a life limit. On rainy days, the humidity difference between the inside and outside of the device is large, which can easily increase the stress of the sealing ring and accelerate the aging of the sealing ring. In severe cold weather, if rainwater penetrates in, it is easy to freeze at the wiper drive shaft, resulting in limited driving and steering functions, reduced cleaning area, and reduced cleaning ability, which cannot guarantee the normal operation of the wiper.

[0006] (2) A heater is installed at the front glass of the surveillance terminal camera, and the heat generated by the heater melts the ice on the visible area of ​​the lens. Specifically, this solution is to install a lens housing on the device body, set a temperature sensor and a heating plate on the inside of the lens housing, and set a temperature sensor on the outside of the lens housing. When the device starts the de-icing function, the heating plate is activated to heat the surface of the lens body to remove ice and mist. The temperature sensor detects the temperature of the lens housing. If the measured temperature is higher than the set upper temperature limit, the heating plate is turned off. If the measured temperature is lower than the set lower temperature limit, the heating is activated.

[0007] The problem is that the heater installation structure is complex and requires additional power supply. Once damaged, the equipment needs to be completely disassembled and opened for component repair and replacement. The transmission line video surveillance terminal is mostly used on the towers along the transmission line. The tower distribution area has diverse and complex terrain, and the terminal is installed at a high height. These factors have certain requirements on the work ability and physical fitness of maintenance personnel. These factors increase the complexity and difficulty of maintenance and replacement, and reduce work efficiency. In addition, the lens heater of this device can only passively solve the problem of camera icing, and cannot meet the video monitoring work requirements such as timely wiping rain off the lens in rainy environments. Summary of the invention

[0008] Purpose of the invention: The purpose of the invention is to provide a transmission line video surveillance terminal that is highly reliable, easy to install and maintain, and can ensure image acquisition quality and is adaptable to severe rainy and snowy weather.

[0009] Technical solution: The present invention provides a power transmission line video surveillance terminal that is adaptable to severe rainy and snowy weather, comprising an upper cover and a lower cover shell that are sealed and connected, a camera is installed in the lower cover shell, a centrifugal fan and an axial flow fan are arranged on the outside of the camera front glass, and the axial flow fan is located on the outside of the centrifugal fan; the centrifugal fan is used to form an air curtain on the surface of the camera front glass to blow away raindrops or snowflakes that fall into the visible area of ​​the camera, and the blowing area of ​​the centrifugal fan is larger than the visible area of ​​the camera; the axial flow fan is used to generate an airflow from the terminal to the outside in front of the visible area of ​​the camera to push raindrops or snowflakes to the outside of the terminal.

[0010] Furthermore, the power transmission line video surveillance terminal adapted to severe rain and snow weather also includes a partition, which is fixed to the inner circle step surface of the upper cover by screws; the camera includes a front camera and a rear camera, and the two cameras are fixed to the bottom of the partition by a camera fixing bracket.

[0011] Furthermore, a power supply assembly and a PCB assembly are installed on the upper part of the partition; an aviation plug is provided on the top of the upper cover, and the aviation plug is connected to the electrical interface on the PCB board; a fan aviation plug is provided on the lower cover for connecting the fan and the PCB board; and the camera transmission line is connected to the PCB board.

[0012] Furthermore, the camera fixing bracket is threadedly connected to the rivet on the partition.

[0013] Furthermore, the front camera is connected and fixed to the camera fixing bracket via the front camera slot and screws; the rear camera is connected and fixed to the camera fixing bracket via the rear camera slot and screws; the angle of the camera can be adjusted within a certain range via the screws.

[0014] Furthermore, the angle range of the front camera is -5° to +5° in the left and right direction, and the angle range of the rear camera is -5° to +5° in the up and down direction.

[0015] Furthermore, two fan slots are respectively provided on the outer surface of the lower cover shell parallel to the two cameras, and the inner side of the centrifugal fan is fixed close to the inner wall of the fan slot; the air outlet of the centrifugal fan shell is inclined, and the air outlet direction is toward the front glass of the camera; the axial flow fan is connected and fixed to the outer fan cover net through a motor clamp, the fan cover net is threadedly fixed to the fan slot, and the side panel of the fan cover net has a shutter air inlet.

[0016] Furthermore, the axial flow fan has two blades, and the camera's shooting frequency is higher than the countdown of the time when the adjacent blades leave and enter the visible area; the host starts the fan after determining that it is rainy or snowy weather through image recognition, and deletes the image of the blades rotating during the operation of the axial flow fan that blocks the camera's field of view according to the fixed shooting frequency.

[0017] Furthermore, a hydrophobic coating is provided on the front glass surface of the camera, which ensures that water droplets do not stay in front of the lens.

[0018] Furthermore, the upper cover is connected to the lower casing by screws, and the circular platform on the upper part of the lower casing presses the sealing strip on the step surface of the outer ring of the upper cover; and a hanging ear is arranged on the top of the upper cover.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0020] (1) Two lines of defense are adopted, using axial flow fans and centrifugal fans to blow the camera front glass, realizing active anti-fouling before rain, snow and dust fall into the camera's visual area, effectively preventing rain and snow from contaminating the lens field of view. The monitoring terminal can work normally in harsh environments such as rain, snow and ice, and has high-quality image monitoring functions.

[0021] (2) Compared with the wiper solution, the present invention has no transmission components, travel control components and easily failed rubber parts, and has a low product failure rate, a long maintenance cycle and a low maintenance cost.

[0022] (3) Compared with the heater solution, the present invention is equipped with an external fan. When a component fails, there is no need to disassemble the device body, which simplifies the installation and disassembly operations of the device on the power pole tower, facilitates installation and maintenance, and reduces the complexity and difficulty of component repair and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a power transmission line video monitoring terminal adapted to severe rainy and snowy weather provided by an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 AA cross-section diagram;

[0025] Figure 3 yes Figure 1 BB cross-section diagram;

[0026] Figure 4 yes Figure 1 Exploded diagram of . DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Attached Figures 1 to 4 The reference numerals in the figures are as follows:

[0029] 1. Upper cover; 2. Partition; 3. Camera fixing bracket; 4. Screws; 5. Rear camera; 6. Rear camera slot; 7. Fan cover; 8. Lower cover; 9. Fan connector; 10. Screws; 11. Front camera; 12. Front camera slot; 13. Rivets; 14. Axial fan; 15. First magnet; 16. Motor clamp; 17. Second magnet; 18. Centrifugal fan; 19. Connector; 20. Power supply assembly; 21. PCB assembly; 22. Mounting ears.

[0030] like Figures 1 to 4 As shown, an embodiment of the present invention provides a power transmission line video monitoring terminal that can adapt to severe rainy and snowy weather. The monitoring terminal is an integrated structure, including an upper cover 1, a partition 2 and a lower cover shell 8. The upper cover 1 has four screw holes on the outermost side of the bottom end. The upper cover 1 is connected to the lower cover shell 8 by screws. The upper circular platform of the lower cover shell 8 presses the sealing strip on the outer step surface of the upper cover 1 to form a sealing structure.

[0031] There are four screw holes on the inner step surface of the upper cover 1, and the partition 2 is fixed to the inner step surface of the upper cover 1 by screws, and the upper part of the partition 2 forms a mainframe compartment. The partition 2 is installed with a power supply component 20 and a PCB component 21, and an aviation plug 19 is provided on the top of the upper cover 1. Signal lines such as power supply, measurement, image, and wireless signal transmission are connected to the corresponding electrical interfaces of the PCB board through the aviation plug 19.

[0032] Two hanging ears 22 are arranged on the top of the upper cover 1 for mounting the monitoring terminal on a power pole.

[0033] The front camera 11 and the rear camera 5 are installed in the lower housing 8. The camera fixing bracket 3 is threadedly connected and fixed with the rivet 13 on the partition 2, and the camera transmission line is connected to the PCB board through the central through hole of the partition 2. The front camera 11 is connected and fixed to the camera fixing bracket 3 through the front camera card slot 12 and the screw 10, and the rear camera 5 is connected and fixed to the camera fixing bracket 3 through the rear camera card slot 6 and the screw 4. The angle of the camera can be adjusted within a certain range by the screws. In this embodiment, the angle range of the front camera 11 is -5° to +5° in the left and right direction, and the angle range of the rear camera 5 is -5° to +5° in the up and down direction.

[0034] A centrifugal fan 18 and an axial flow fan 14 are arranged outside the front glass of the camera, and the axial flow fan 14 is located outside the centrifugal fan 18; the centrifugal fan 18 is used to form an air curtain on the surface of the front glass of the camera to blow away raindrops or snowflakes falling into the visible area of ​​the camera, and the blowing area of ​​the centrifugal fan 18 is larger than the visible area of ​​the camera; the axial flow fan 14 is used to generate an airflow from the terminal to the outside in front of the visible area of ​​the camera to push raindrops or snowflakes to the outside of the terminal (that is, to blow raindrops or snowflakes falling into the visible area of ​​the camera away from the terminal). Specifically:

[0035] Two fan slots are respectively molded on the outer side of the lower square shell of the lower cover 8 and parallel to the two cameras, and the inner side of the centrifugal fan 18 is fixed to the inner wall of the fan slot by structural adhesive. The air outlet of the centrifugal fan 18 shell is inclined, and after being assembled to the fan slot, a narrow rectangular air outlet is formed on the surface of the lower cover 8. The long side of the rectangular air outlet is larger than the horizontal width of the camera's visible area, and the air outlet direction is toward the camera's front glass.

[0036] The axial flow fan 14 is connected and fixed to the bottom plate of the L-shaped fan cover net 7 through a motor clamp 16 with a first magnet 15 and a second magnet 16 on both sides, and the motor clamp 16 is connected to the fan cover net 7 by screws. The four corners of the side plate of the fan cover net 7 are preset with screw holes, which are connected and fixed to the fan slot by screws. The side plate of the fan cover net 7 has a shutter air inlet to prevent rainwater from entering from the air inlet.

[0037] The axial flow fan 14 has two blades. The rotation of the axial flow fan blades will enter the visible area of ​​the camera. Therefore, the camera's shooting frequency must be higher than the countdown of the time it takes for adjacent blades to leave and enter the visible area.

[0038] A fan connector 9 is provided on the lower housing 8 for connecting the external centrifugal fan 18 and the axial flow fan 14 via the PCB board.

[0039] In addition, a hydrophobic coating is provided on the surface of the front glass of the camera. The lower part of the upper cover 1 is a drip-proof eaves structure, which can prevent water from accumulating on the top and upper side walls from sliding down along the front glass of the camera.

[0040] When the lower cover 8 is formed by using a transparent material, it is not necessary to specially provide a camera front glass.

[0041] The working principle of the present invention is:

[0042] Based on the real-time image information collected by the camera monitoring, the host determines whether there is rain or snow through the image recognition algorithm (existing technology). Once it rains or snows, the centrifugal fan 18 and the axial flow fan 14 are started. The outer axial flow fan 14 serves as the first line of defense to blow away the rain or snow close to the lens, while the centrifugal fan 18 serves as the second line of defense, which can form a strong airflow in the local area of ​​the camera front glass to produce an air curtain effect. The air curtain prevents raindrops and snowflakes from contacting the front glass, keeping the outer surface of the front glass clean. In this way, rain and snow can be prevented from polluting the lens field of view, ensuring that the camera can continuously and high-quality image acquisition.

[0043] After the fan is started, the host first determines the complete image frame in the video (there are no fan blades in the image) through image recognition, and then automatically deletes the image of the axial flow fan 14 14 blades rotating during operation and blocking the camera's field of view according to the set fan fixed frequency to ensure the validity of the image.

Claims

1. A power transmission line video monitoring terminal adapted to severe rain and snow weather, characterized in that: The invention comprises an upper cover (1) and a lower cover shell (8) which are sealed and connected, wherein a camera is installed in the lower cover shell (8), and a centrifugal fan (18) and an axial flow fan (14) are arranged outside the front glass of the camera, wherein the axial flow fan (14) is located outside the centrifugal fan (18); the centrifugal fan (18) is used to form an air curtain on the surface of the front glass of the camera to blow away raindrops or snowflakes falling on the visible area of ​​the camera, and the blowing area of ​​the centrifugal fan (18) is larger than the visible area of ​​the camera; and the axial flow fan (14) is used to generate an airflow from the terminal to the outside in front of the visible area of ​​the camera to push raindrops or snowflakes to the outside of the terminal.

2. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 1 is characterized in that: It also includes a partition (2), which is fixed to the inner circle step surface of the upper cover (1) by screws; the camera includes a front camera (11) and a rear camera (5), and the two cameras are fixed to the bottom of the partition (2) by a camera fixing bracket (3).

3. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 2 is characterized in that: A power supply assembly (20) and a PCB assembly (21) are installed on the upper part of the partition (2); an aviation plug (19) is arranged on the top of the upper cover (1), and the aviation plug (19) is connected to the electrical interface on the PCB board; a fan aviation plug (9) is arranged on the lower cover (8) and is used to connect the fan and the PCB board; and a camera transmission line is connected to the PCB board.

4. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 2 is characterized in that: The camera fixing bracket (3) is threadedly connected to the rivet (13) on the partition plate (2).

5. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 2 is characterized in that: The front camera (11) is connected and fixed to the camera fixing bracket (3) via the front camera card slot (12) and screws; the rear camera (5) is connected and fixed to the camera fixing bracket (3) via the rear camera card slot (6) and screws; and the angle of the camera can be adjusted within a certain range via the screws.

6. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 5 is characterized in that: The angle range of the front camera (11) is -5° to +5° in the left-right direction, and the angle range of the rear camera (5) is -5° to +5° in the up-down direction.

7. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 2 is characterized in that: Two fan slots are respectively arranged on the outer side of the lower cover shell (8) and parallel to the two cameras, and the inner side of the centrifugal fan (18) is fixed in close contact with the inner wall surface of the fan slot; the air outlet of the outer shell of the centrifugal fan (18) is inclined, and the air outlet direction is toward the front glass of the camera; the axial flow fan (14) is connected and fixed to the outer fan cover net (7) through a motor clamp (16), the fan cover net (7) is threadedly connected and fixed to the fan slot, and the side plate of the fan cover net (7) has a shutter air inlet.

8. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 7 is characterized in that: The axial flow fan (14) has two blades, and the camera's photographing frequency is higher than the countdown of the time when adjacent blades leave and enter the visible area; the host computer starts the fan after judging that it is rainy or snowy weather through image recognition, and deletes images of the blades rotating and blocking the camera's field of view during the operation of the axial flow fan (14) according to the fixed photographing frequency.

9. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 1 is characterized in that: The camera front glass surface is provided with a hydrophobic coating.

10. The power transmission line video monitoring terminal adapted to severe rain and snow weather according to claim 1 is characterized in that: The upper cover (1) is connected to the lower cover shell (8) by screws, and the upper circular platform of the lower cover shell (8) presses the sealing strip on the outer step surface of the upper cover (1); and a hanging ear (22) is arranged on the top of the upper cover (1).

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