Ship collision avoidance radar system

Abstract

This application relates to a ship collision avoidance radar system, applied in the field of ship collision avoidance technology. It includes a radar tower mounted on the hull, a camera device mounted on the radar tower, a receiving platform between the camera device and the radar tower, and a microcontroller, a camera automatic controller, a buzzer, and a data transceiver connected to the microcontroller within the receiving platform. The camera device is connected to the camera automatic controller, and the data transceiver is connected to a control terminal in the bridge. Radar detection devices are arranged around the radar tower. The radar tower has a rotation drive unit and a support arm unit. The radar detection devices are mounted on the support arm unit, and the rotation drive unit drives the support arm unit to rotate the radar detection devices. A radar signal processor connected to the microcontroller is located within the receiving platform, and the radar detection devices are connected to the radar signal processor. This application achieves comprehensive detection of the ship's surrounding environment without requiring multiple radar detection devices, improving the utilization rate of radar detection devices and reasonably controlling the cost of ship equipment.

Description

Technical Field

[0001] This application relates to the field of ship collision avoidance technology, and in particular to a ship collision avoidance radar system. Background Technology

[0002] Given the frequent occurrence of ship collisions, ensuring the safety of ships during their voyages at sea is of paramount importance. Currently, radar technology is widely used on ships to achieve collision avoidance. Common marine radar technologies include ultrasonic radar, millimeter-wave radar, and lidar.

[0003] Chinese Patent CN212341451U discloses a ship collision avoidance radar device. The radar detection device is installed along the outer edge of the ship's hull, with multiple devices distributed around the perimeter to achieve complete detection of the surrounding environment. When the radar detection device detects a ship entering its warning range, it transmits a signal to a radar signal processor. The processor processes the signal and transmits it to a microcontroller. The microcontroller receives the information, determines the ship's position, and issues an alarm command to a buzzer. Based on the position information, the microcontroller also sends a command to an automatic camera controller. The automatic camera controller then controls a camera to capture images of the approaching ship and transmits the image to the microcontroller. The microcontroller then transmits the radar signal and camera image to the bridge control terminal in real time via a data transceiver, allowing the crew to receive timely information, make correct judgments, and reduce the probability of a collision.

[0004] Installing radar detection devices on the outer edge of the ship's hull requires multiple radar detection devices to completely cover the surrounding area, which results in low utilization of the radar detection devices and increased overall equipment costs. Summary of the Invention

[0005] In order to overcome the deficiencies in the prior art, this application provides a ship collision avoidance radar system.

[0006] The ship collision avoidance radar system provided in this application adopts the following technical solution: A ship collision avoidance radar system includes a radar tower mounted on top of the ship's hull. A camera device is mounted on top of the radar tower. A receiving platform is located between the camera device and the radar tower. Inside the receiving platform is a microcontroller, an automatic camera controller, a buzzer, and a data transceiver electrically connected to the microcontroller. The camera device and the automatic camera controller are electrically connected, and the data transceiver is electrically connected to the ship's bridge control terminal. Multiple radar detection devices are distributed around the radar tower. The radar tower has a rotary drive unit and a support arm unit connected to it. The multiple radar detection devices are distributed on the support arm unit. The rotary drive unit can drive the support arm unit to rotate the multiple radar detection devices horizontally around the radar tower. A radar signal processor electrically connected to the microcontroller is also located inside the receiving platform. The radar detection devices are electrically connected to the radar signal processor.

[0007] By adopting the above technical solution, the radar detection device is no longer installed on the outer side of the hull but on a radar tower on the top of the hull. This gives each radar detection device a wider detection range. During the process of the radar detection device detecting the environment around the ship, the rotary drive unit can drive the support arm unit to make each radar detection device rotate horizontally around the radar tower. This allows each radar detection device to conduct comprehensive and blind-spot-free detection of the environment around the ship. This technical solution can achieve comprehensive and blind-spot-free detection of the environment around the ship without installing a large number of radar detection devices, effectively improving the utilization rate of the radar detection device and reasonably controlling the cost of the ship's equipment.

[0008] Optionally, the rotary drive unit includes a drive motor, a drive gear, a driven gear, and a tower sleeve. The radar tower has an internal mounting cavity. The drive motor and the drive gear are both located in the mounting cavity. The drive motor is fixed in the mounting cavity. The drive gear is coaxially fixed on the motor shaft of the drive motor. The tower sleeve is fitted onto the outside of the radar tower and is rotatably connected to the radar tower. The driven gear is a segment fixed to the inner ring of the tower sleeve. The side wall of the radar tower has a gear notch that communicates with the mounting cavity. The length of the gear notch is greater than the length of the driven gear. The driven gear passes through the gear notch and extends into the mounting cavity to mesh with the drive gear.

[0009] By adopting the above technical solution, the drive motor can drive the drive gear to rotate during operation. With the drive gear and driven gear meshing, the turret sleeve can be driven to rotate, thereby causing each radar detection device to rotate horizontally around the radar turret. This enables each radar detection device to perform comprehensive, blind-spot-free detection of the ship's surrounding environment. Due to the limitation of the gear tooth notch, the drive motor can only drive each radar detection device to rotate horizontally within a certain angle range, and this is a reciprocating motion, allowing for continuous and comprehensive detection of the ship's surrounding environment.

[0010] Optionally, the driven gear tooth is located at the upper edge of the inner ring of the tower sleeve, and the gear tooth notch is located at the bottom space of the mounting cavity; the top of the housing of the drive motor is provided with a mounting plate, and the mounting plate is fixed to the inner wall of the mounting cavity by bolts; there is an installation space between the top of the housing of the drive motor and the top wall of the mounting cavity, and when the drive motor moves up into the installation space, the driving gear and the driven gear tooth separate; the side wall of the radar tower is provided with an installation notch that communicates with the mounting cavity, and the drive motor and the driving gear can be moved out of the mounting cavity from the installation notch; the installation notch is provided with a tower side door that can seal the installation notch.

[0011] By adopting the above technical solution, the reserved installation space and installation notch at the top of the installation cavity facilitate the disassembly and assembly of the drive motor and the drive gear, and also make it easier to inspect and maintain the drive motor. The tower side door seals the installation notch to ensure that the installation cavity is in a sealed environment.

[0012] Optionally, the edge of the mounting notch is a first step structure, and the edge of the tower side door is a second step structure. The first step structure and the second step structure are adapted to allow the tower side door to be installed in the mounting notch. The tower side door and the side wall of the radar tower are fixed together by screws.

[0013] By adopting the above technical solution, the setting of the first step structure and the second step structure allows the tower side door to be installed in the installation notch while also limiting the tower side door to prevent it from falling into the installation cavity.

[0014] Optionally, a sealing ring is provided between the first step structure and the second step structure.

[0015] By adopting the above technical solution, a sealing ring is set between the first step structure and the second step structure to ensure the sealing between the tower side door and the installation notch, preventing rainwater from falling into the installation cavity and causing the drive motor to become damp and damaged.

[0016] Optionally, the tower side door is densely covered with heat dissipation holes, which are in a serpentine structure. One end of each heat dissipation hole is located at the top of the tower side door and communicates with the mounting cavity, while the other end is located at the bottom of the tower side door and communicates with the external environment.

[0017] By adopting the above technical solution, the heat dissipation holes of the serpentine structure ensure that the mounting cavity is connected to the external environment and that the heat generated during the operation of the drive motor can be dissipated normally, while preventing rainwater from falling into the mounting cavity through the heat dissipation holes.

[0018] Optionally, the bottom wall of the mounting cavity extends downward to form a drainage channel that penetrates the side wall of the radar tower, connecting the mounting cavity to the external environment.

[0019] By adopting the above technical solution, even if rainwater may enter the installation cavity through the notch in the gear teeth, it will be discharged in time through the drainage channel, thus avoiding water accumulation in the installation cavity and causing the drive motor to be damaged by moisture.

[0020] Optionally, a support sleeve is fitted on the outer side of the radar tower below the tower sleeve, the support sleeve and the radar tower are fixedly connected, and the tower sleeve is placed on the surface of the support sleeve.

[0021] By adopting the above technical solution, the support sleeve provides support for the tower sleeve, ensuring the stable operation of the tower sleeve, the support arm unit, and the radar detection device.

[0022] Optionally, the surface of the support sleeve is fitted with a plurality of balls, and the tower sleeve is in contact with the plurality of balls.

[0023] By adopting the above technical solution, the ball bearings embedded on the surface of the tower sleeve directly contact the support sleeve, which enables the support sleeve to provide support force for the tower sleeve while reducing the friction between the tower sleeve and the support sleeve, thus preventing the tower sleeve from experiencing too much frictional resistance from the support sleeve during rotation.

[0024] Optionally, the support arm unit includes support arms distributed around the tower sleeve and cross braces connecting adjacent support arms. The support arms and the radar detection device are arranged in a one-to-one correspondence. A support plate is provided on the support arm, and the radar detection device is mounted on the support plate.

[0025] By adopting the above technical solution, the support arm unit, which consists of a support arm, a cross brace, and a support plate, can stably support and fix the radar detection device.

[0026] In summary, this application includes the following beneficial technical effects: 1. The radar detection device is installed on the outer side of the ship's hull instead of on the radar tower on the top of the hull. This gives each radar detection device a wider detection range. During the process of the radar detection device detecting the environment around the ship, the drive motor can drive the support arm to make each radar detection device rotate horizontally around the radar tower. This allows each radar detection device to conduct comprehensive and blind-spot-free detection of the environment around the ship. The technical solution of this application does not require the installation of a large number of radar detection devices to achieve comprehensive and blind-spot-free detection of the environment around the ship, effectively improving the utilization rate of the radar detection device and reasonably controlling the cost of the ship's equipment. 2. The reserved installation space and installation notch at the top of the mounting cavity facilitate the disassembly and assembly of the drive motor and drive gear, and also make it easy to inspect and maintain the drive motor. The tower side door seals the installation notch, ensuring that the mounting cavity is in a sealed environment, thereby ensuring the safe and stable operation of the drive motor; 3. The support sleeve provides support for the tower sleeve, ensuring the stable operation of the tower sleeve, support arm unit and radar detection device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the ship collision avoidance radar system in the embodiments of this application.

[0028] Figure 2 This is a partial structural diagram of the top of the radar tower in an embodiment of this application.

[0029] Figure 3 This is a partial structural cross-sectional view of the top of the radar tower in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the tooth notch and mounting notch on the radar tower in an embodiment of this application.

[0031] Figure 5 This is a cross-sectional view of the tower side door in an embodiment of this application.

[0032] Reference numerals: 1. Hull; 2. ; 3. Radar tower; 31. Mounting cavity; 311. Mounting space; 32. Gear tooth notch; 33. Mounting notch; 34. Drainage channel; 4. Receiving platform; 5. Camera device; 6. Radar detection device; 7. Rotary drive unit; 71. Drive motor; 711. Mounting plate; 72. Drive gear; 73. Driven gear tooth; 74. Tower sleeve; 8. Support arm unit; 81. Support arm; 82. Horizontal support rod; 83. Support plate; 9. Tower side door; 91. Heat dissipation hole; 10. Sealing ring; 11. Support sleeve; 12. Ball bearing. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a ship collision avoidance radar system, referring to... Figure 1 and Figure 2 The ship collision avoidance radar system includes a radar tower 3 mounted on top of the deckhouse 2 of the hull 1. A receiving platform 4 is located on top of the radar tower 3, and a camera device 5, capable of 360° rotation, is mounted on top of the receiving platform 4 to capture images of nearby vessels. The receiving platform 4 houses a microcontroller and, electrically connected to the microcontroller, an automatic camera controller, a radar signal processor, a buzzer, and a data transceiver. The camera is electrically connected to the automatic camera controller, and the data transceiver is electrically connected to a control terminal in the bridge of the hull 1. Four radar detection devices 6 are evenly distributed around the radar tower 3, their placement ensuring a wider detection range. Figure 3 Furthermore, a rotary drive unit 7 and a support arm unit 8 are installed on the radar tower 3. The rotary drive unit 7 is located inside the radar tower 3, and the support arm units 8 are distributed around the radar tower 3 for the installation of four radar detection devices 6. The rotary drive unit 7 and the support arm units 8 are connected by a transmission. The rotary drive unit 7 can drive the support arm units 8 to make the four radar detection devices 6 rotate horizontally around the radar tower 3. This application sets the detection range of each radar detection device 6 to 60°, that is, there will be a 30° detection blind spot between adjacent radar detection devices 6. By setting the rotary drive unit 7 to drive the support arm units 8 to make the four radar detection devices 6 rotate back and forth in a 30° motion, the above-mentioned 30° detection blind spot can be compensated, so that the four radar detection devices 6 can make comprehensive and blind-spot-free detection of the environment around the ship. The technical solution of this application can achieve comprehensive and blind-spot-free detection of the environment around the ship without installing a large number of radar detection devices 6, effectively improving the utilization rate of radar detection devices 6, and reasonably controlling the cost of equipment on the hull 1.

[0035] The radar detection device 6 and the radar signal processor are electrically connected. Therefore, when the radar detection device 6 detects a ship entering the radar warning range, it transmits the signal to the radar signal processor. The radar signal processor processes the signal and transmits it to the microcontroller. The microcontroller receives the information, obtains the ship's position, and issues an alarm command to the buzzer. Based on the position information, the microcontroller issues a command to the automatic camera controller. The automatic camera controller controls the camera to take pictures of the approaching ship and transmits the video image to the microcontroller. The microcontroller then transmits the radar signal and the video image to the bridge control terminal in real time via a data transceiver, allowing the crew to receive timely information and make correct judgments, effectively reducing the probability of ship collisions.

[0036] Reference Figure 2 and Figure 3The radar tower 3 has an internal mounting cavity 31. The rotary drive unit 7 includes a drive motor 71 and a drive gear 72 housed in the mounting cavity 31, as well as a driven gear 73 and a tower sleeve 74. The drive gear 72 is located below the drive motor 71 and coaxially fixed to the motor shaft of the drive motor 71. The drive gear 72 is close to the bottom wall of the mounting cavity 31, which creates a mounting space 311 between the top of the drive motor 71 housing and the top wall of the mounting cavity 31. The mounting space 311 allows the drive motor 71 and the drive gear 72 to be adjusted vertically within a certain range in the mounting cavity 31, thus facilitating the installation and removal of the drive motor 71 and the drive gear 72 relative to the mounting cavity 31. However, in actual application, the drive motor 71 does not occupy the aforementioned mounting space 311. The drive gear 72 is close to the bottom wall of the mounting cavity 31. An L-shaped mounting plate 711 is fixed to the top of the drive motor 71 housing. The mounting plate 711 is fixed to the side wall of the mounting cavity 31 by bolts. Figure 4 The side wall of the radar tower 3 has a through-hole, which communicates with the mounting cavity 31. The position of the mounting notch 33 is opposite to the position of the mounting plate 711. When installing the drive motor 71 and the drive gear 72, the drive motor 71 and the drive gear 72 are inserted into the mounting cavity 31 through the mounting notch 33 and moved down so that the drive gear 72 is close to the bottom wall of the mounting cavity 31. Then the mounting plate 711 is installed. When removing the drive motor 71 and the drive gear 72, the mounting plate 711 is removed first, and then the drive motor 71 and the drive gear 72 are moved up and removed from the mounting cavity 31 through the mounting notch 33.

[0037] Reference Figure 3 and Figure 4 The tower sleeve 74 is fitted on the outside of the radar tower 3 and is rotatably connected to the radar tower 3. It should be noted that the tower sleeve 74 is located at the bottom space of the mounting cavity 31. The tower sleeve 74 and the mounting notch 33 do not interfere with each other, so it will not affect the installation and removal of the drive motor 71 and the drive gear 72. The driven gear tooth 73 is integrally formed on the upper edge of the inner ring of the tower sleeve 74, so that the driven gear tooth 73 is at the same height as the driving gear 72. The driven gear tooth 73 is only a small segment. A tooth notch 32 that communicates with the mounting cavity 31 is provided through the side wall of the radar tower 3. The tooth notch 32 is also opened in the bottom space of the mounting cavity 31, corresponding to the positions of the driven gear tooth 73 and the driving gear 72. The driven gear tooth 73 passes through the tooth notch 32 and extends into the mounting cavity 31 to mesh with the driving gear 72. Therefore, during the operation of the drive motor 71, it can drive the driving gear 72 to rotate back and forth. Under the relationship of mutual meshing between the driving gear 72 and the driven gear tooth 73 (the driven gear tooth 73 moves back and forth in the tooth notch 32), the tower sleeve 74 is driven to rotate back and forth.

[0038] Reference Figure 3To ensure the safe and stable operation of the drive motor 71 within the mounting cavity 31, unaffected by rain or other harsh external conditions, a tower side door 9 is installed to seal the mounting notch 33, ensuring the mounting cavity 31 remains in a relatively sealed environment. Specifically, the edge of the mounting notch 33 is designed as a first step structure, while the edge of the tower side door 9 is designed as a second step structure. These two structures are adaptable, allowing the tower side door 9 to be stably installed within the mounting notch 33, sealing it. The tower side door 9 is then secured to the side wall of the radar tower 3 with screws. To further enhance the safety of the drive motor 71's operation, protecting it from rain and other harsh external conditions, a sealing ring 10 made of silicone is installed between the first and second step structures to ensure a tight seal between the tower side door 9 and the mounting notch 33. Figure 5 In addition, the interior of the tower side door 9 is provided with multiple heat dissipation holes 91. The heat dissipation holes 91 have a serpentine structure, with one end located at the top of the tower side door 9 and connected to the mounting cavity 31, and the other end located at the bottom of the tower side door 9 and connected to the external environment. The heat dissipation holes 91 ensure that the heat generated during the operation of the drive motor 71 can be dissipated normally, and their special serpentine structure will not allow rainwater to fall into the mounting cavity 31.

[0039] Reference Figure 3 Because of the tooth notch 32, rainwater can still enter the mounting cavity 31. In order to prevent water from accumulating in the mounting cavity 31 and causing the drive motor 71 to be damaged by moisture, a sloping drainage channel 34 extends downward from the bottom wall of the mounting cavity 31. The drainage channel 34 penetrates the outer wall of the radar tower 3, connecting the mounting cavity 31 with the external environment. Therefore, even if rainwater seeps into the mounting cavity 31 from the tooth notch 32, the rainwater will be discharged in time from the drainage channel 34 and will not accumulate in the mounting cavity 31.

[0040] Reference Figure 3 A support sleeve 11 is also fitted on the outside of the radar tower 3. The support sleeve 11 is located below the tower sleeve 74 and is fixedly connected to the radar tower 3. The upper surface of the support sleeve 11 is densely embedded with ball bearings 12. The tower sleeve 74 and the ball bearings 12 are in contact to provide sufficient support force for the tower sleeve 74, ensuring the stable operation of the tower sleeve 74, the support arm unit 8, and the radar detection device 6. At the same time, it avoids direct contact between the tower sleeve 74 and the support sleeve 11, reduces the friction between the tower sleeve 74 and the support sleeve 11, and prevents the tower sleeve 74 from being subjected to too much frictional resistance from the support sleeve 11 during rotation.

[0041] Reference Figure 2The support arm unit 8 of this application includes support arms 81, cross braces 82, and support plates 83. Four support arms 81, four cross braces 82, and four support plates 83 are provided, corresponding to four radar detection devices 6. The four support arms 81 are evenly distributed around the tower sleeve 74 and fixedly connected to the tower sleeve 74. One cross brace 82 is provided between every two adjacent support arms 81 to connect the two adjacent support arms 81 and ensure the structural stability of the entire support arm unit 8. The support plate 83 is fixed to the end of the support arm 81 away from the tower sleeve 74. The radar detection devices 6 are installed on the support plate 83. During the reciprocating rotation of the tower sleeve 74 driven by the drive motor 71, the above-mentioned support arm unit 8 is driven to reciprocate, thereby realizing the comprehensive and blind-spot-free detection of the surrounding environment of the ship by the four radar detection devices 6.

[0042] The implementation principle of a ship collision avoidance radar system according to an embodiment of this application is as follows: The rotary drive unit 7 drives the support arm unit 8 to drive four radar detection devices 6 to perform horizontal reciprocating rotation around the radar tower 3, enabling the four radar detection devices 6 to perform comprehensive and blind-spot-free detection of the ship's surrounding environment. When a radar detection device 6 detects a ship entering the radar warning range, the radar detection device 6 transmits a signal to the radar signal processor. The radar signal processor processes the signal and transmits it to the microcontroller. The microcontroller receives the information, obtains the ship's position, and issues an alarm command to the buzzer. Based on the position information, the microcontroller issues a command to the automatic camera controller. The automatic camera controller controls the camera to take pictures of the approaching ship and transmits the picture to the microcontroller. The microcontroller transmits the radar signal and the picture to the bridge control terminal in real time through a data transceiver, allowing the crew to receive information in a timely manner and make correct judgments, effectively reducing the probability of ship collisions.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ship collision avoidance radar system, characterized in that, The system includes a radar tower (3) mounted on top of the deckhouse (2) of the hull (1). A camera device (5) is mounted on top of the radar tower (3). A receiving platform (4) is provided between the camera device (5) and the radar tower (3). The receiving platform (4) contains a microcontroller, an automatic camera controller, a buzzer, and a data transceiver, all electrically connected to the microcontroller. The camera device (5) is electrically connected to the automatic camera controller, and the data transceiver is electrically connected to the control terminal in the bridge of the hull (1). The radar tower (3)... Multiple radar detection devices (6) are distributed around the radar tower (3). The radar tower (3) is equipped with a rotary drive unit (7) and a support arm unit (8). The rotary drive unit (7) and the support arm unit (8) are connected. Multiple radar detection devices (6) are distributed on the support arm unit (8). The rotary drive unit (7) can drive the support arm unit (8) to make multiple radar detection devices (6) rotate horizontally around the radar tower (3). The receiving platform (4) is also equipped with a radar signal processor electrically connected to a single-chip microcomputer. The radar detection device (6) and the radar signal processor are electrically connected; the rotary drive unit (7) includes a drive motor (71), a drive gear (72), a driven gear (73), and a tower sleeve (74). The radar tower (3) has an internal mounting cavity (31). The drive motor (71) and the drive gear (72) are both located in the mounting cavity (31). The drive motor (71) is fixed in the mounting cavity (31), and the drive gear (72) is coaxially fixed on the motor shaft of the drive motor (71). The tower sleeve (74) is fitted on the outside of the radar tower (3) and rotatably connected to the radar tower (3). The driven gear tooth (73) is set as a section and fixed to the inner ring of the tower sleeve (74). The side wall of the radar tower (3) is provided with a gear tooth notch (32) that communicates with the mounting cavity (31). The length of the gear tooth notch (32) is greater than the length of the driven gear tooth (73). The driven gear tooth (73) passes through the gear tooth notch (32) and extends into the mounting cavity (31) to mesh with the driving gear (72).

2. The ship collision avoidance radar system according to claim 1, characterized in that, The driven gear tooth (73) is located at the upper edge of the inner ring of the tower sleeve (74), and the gear tooth notch (32) is located at the bottom space of the mounting cavity (31); the top of the housing of the drive motor (71) is provided with a mounting plate (711), and the mounting plate (711) is fixed to the inner wall of the mounting cavity (31) by bolts; there is a mounting space (311) between the top of the housing of the drive motor (71) and the top wall of the mounting cavity (31), when the drive motor ( 71) After moving upward into the installation space (311), the driving gear (72) and the driven gear (73) separate; the side wall of the radar tower (3) is provided with an installation notch (33) that communicates with the installation cavity (31), the drive motor (71) and the driving gear (72) can move out of the installation cavity (31) from the installation notch (33), and a tower side door (9) that can block the installation notch (33) is provided at the installation notch (33).

3. The ship collision avoidance radar system according to claim 2, characterized in that, The edge of the mounting notch (33) is a first step structure, and the edge of the tower side door (9) is a second step structure. The first step structure and the second step structure are adapted to allow the tower side door (9) to be installed in the mounting notch (33). The tower side door (9) and the side wall of the radar tower (3) are fixed together by screws.

4. The ship collision avoidance radar system according to claim 3, characterized in that, A sealing ring (10) is provided between the first step structure and the second step structure.

5. The ship collision avoidance radar system according to claim 2, characterized in that, The tower side door (9) is densely covered with heat dissipation holes (91). The heat dissipation holes (91) have a serpentine structure. One end of the heat dissipation hole (91) is located at the top of the tower side door (9) and communicates with the mounting cavity (31). The other end is located at the bottom of the tower side door (9) and communicates with the external environment.

6. The ship collision avoidance radar system according to claim 1, characterized in that, The bottom wall of the mounting cavity (31) extends downward to form a drainage channel (34), which penetrates the side wall of the radar tower (3) and connects the mounting cavity (31) to the external environment.

7. The ship collision avoidance radar system according to claim 1, characterized in that, A support sleeve (11) is fitted on the outside of the radar tower (3) below the tower sleeve (74). The support sleeve (11) and the radar tower (3) are fixedly connected. The tower sleeve (74) is placed on the surface of the support sleeve (11).

8. The ship collision avoidance radar system according to claim 7, characterized in that, The surface of the support sleeve (11) is fitted with a plurality of balls (12), and the tower sleeve (74) is in contact with the plurality of balls (12).

9. The ship collision avoidance radar system according to claim 1, characterized in that, The support arm unit (8) includes support arms (81) distributed around the tower sleeve (74) and cross braces (82) connecting adjacent support arms (81). The support arms (81) and the radar detection device (6) are arranged in a one-to-one correspondence. A support plate (83) is provided on the support arm (81), and the radar detection device (6) is installed on the support plate (83).

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