A laser radar device heat dissipation structure

Abstract

This utility model discloses a heat dissipation structure for a lidar device, belonging to the field of lidar device technology. It includes a lidar body, a heat dissipation assembly disposed on the outside of the lidar body, and a switch assembly for controlling the heat dissipation assembly. The heat dissipation assembly includes an outer casing, which is fixedly connected to the sides and top of the lidar body by screws. Two sets of air inlet channels are provided on both sides inside the outer casing. This utility model, by setting up air inlet channels, has a simple structure and is convenient and practical. It can guide the high-speed airflow generated by vehicle movement into the interior of the outer casing to dissipate heat from the lidar body and the heat dissipation fins. The switch assembly allows the air inlet plate to be closed, thereby closing the air inlet channels when the temperature is too low, reducing heat exchange with the external environment, ensuring the normal operation of the lidar body and its internal heating elements, and improving its service life.

Description

Technical Field

[0001] This utility model relates to the field of lidar technology, specifically to a lidar heat dissipation structure. Background Technology

[0002] A lidar device is an active remote sensing device that uses laser light as its core detection medium. Its core principle is to scan a target area by emitting a laser beam of a specific wavelength, and then use a receiver to capture the echo signal reflected after the laser encounters an object. Combining the physical property of the constant speed of light, the distance between the device and the target object is accurately calculated by determining the time difference between laser emission and echo reception. During operation, the core components of a lidar device continuously generate heat. If this heat cannot be dissipated in time, the device temperature may become too high, affecting the stability of laser emission power, detection accuracy, and even shortening the lifespan of components. Currently, lidar devices can employ various heat dissipation methods depending on the specific application scenario, such as passive cooling, air cooling, semiconductor cooling, or hybrid cooling.

[0003] When used in automobiles, lidar is usually mounted on the roof. The high-speed airflow generated during vehicle movement facilitates efficient heat exchange with the lidar, improving its heat dissipation performance. However, in the cold winters of northern regions, this efficient heat exchange can lead to excessively low operating temperatures for the lidar and cause its internal heating elements to operate at high power continuously, thus affecting the lidar's lifespan. Current technologies have not solved this problem. Utility Model Content

[0004] The purpose of this invention is to provide a heat dissipation structure for a lidar device. By setting an air intake channel, the high-speed airflow generated by the vehicle's movement can be introduced into the outer casing to dissipate heat from the lidar body and the heat dissipation fins. By setting a switch assembly, the air intake plate can be closed, thereby closing the air intake channel when the temperature is too low, reducing heat exchange with the external environment, ensuring the normal operation of the lidar body and its internal heating elements, and improving its service life, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A heat dissipation structure for a lidar includes a lidar body, a heat dissipation component disposed on the outside of the lidar body, and a switching component for controlling the heat dissipation component.

[0007] The heat dissipation assembly includes an outer casing, which is fixedly connected to the sides and top of the radar body by screws. Two sets of air intake channels are provided on both sides inside the outer casing. An air intake plate is fixedly installed at the air intake of the air intake channel, and air intake slots are equidistantly opened on the surface of the air intake plate.

[0008] The switch assembly includes a switch plate with an air inlet groove identical to the surface of the air inlet plate. The switch plate and the inner side of the air inlet plate are sealed and slidably fitted. The top of the switch plate is fixedly connected to one end of a connecting rod, and the other end of the connecting rod is fixedly installed on both sides of the inclined block. The inclined surface of the inclined block abuts against the unlocking block, and the unlocking block is fixedly connected to the telescopic end of the electric push rod.

[0009] Preferably, the heat dissipation assembly further includes heat dissipation fins, which are disposed on the upper inner side of the outer casing and are fixedly connected to the top of the radar body.

[0010] Preferably, one end of the heat dissipation channel on the surface of the heat dissipation fins faces the air inlet channel, and the other end of the heat dissipation channel faces the air outlet opened on the outer casing.

[0011] Preferably, the air inlet channel has an internal ramp, with the top of the ramp facing the heat dissipation fins.

[0012] Preferably, the bottom of the slope faces the air inlet plate, and the bottom of the air inlet plate and the switch plate are provided with drainage grooves.

[0013] Preferably, two sets of guide seats are fixedly installed on both sides of the switch plate. The guide seats are slidably installed on the surface of the guide rod, and the two ends of the guide rod are fixed to the inner wall of the air inlet channel through mounting seats.

[0014] Preferably, a spring is slidably sleeved on the surface of the guide rod, with the top of the spring abutting against the upper mounting seat and the bottom of the spring abutting against the guide seat.

[0015] Preferably, the electric push rod is fixedly installed on the top of the radar body and electrically connected to the controller, and the unlocking block is slidably engaged with the top of the radar.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model features a simple and convenient air intake channel that directs the high-speed airflow generated by the vehicle's movement into the outer casing to dissipate heat from the radar body and heat dissipation fins. Furthermore, a switch assembly allows the air intake plate to be closed, thereby shutting off the air intake channel when the temperature is too low. This reduces heat exchange with the external environment, ensuring the normal operation of the radar body and its internal heating elements, and extending its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer casing;

[0020] Figure 3 This is a schematic diagram of the switchboard structure;

[0021] Figure 4 This is a schematic diagram of the switch assembly structure;

[0022] Figure 5 This is a schematic diagram of the air outlet structure.

[0023] In the diagram: 1. Radar body; 2. Outer casing; 3. Air inlet channel; 4. Air inlet plate; 5. Air inlet slot; 6. Switch plate; 7. Connecting rod; 8. Inclined block; 9. Unlocking block; 10. Electric push rod; 11. Heat dissipation fins; 12. Heat dissipation channel; 13. Air outlet; 14. Ramp; 15. Drainage trough; 16. Guide seat; 17. Guide rod; 18. Mounting base; 19. Spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 This utility model provides a technical solution:

[0026] A heat dissipation structure for a lidar includes a lidar body 1 and a heat dissipation assembly disposed on the outside of the lidar body 1. The heat dissipation assembly includes an outer casing 2, which is fixedly connected to the sides and top of the lidar body 1 by screws. Two sets of air inlet channels 3 are provided on both sides inside the outer casing 2. An air inlet plate 4 is fixedly installed at the air inlet of the air inlet channel 3. Air inlet grooves 5 are equidistantly opened on the surface of the air inlet plate 4. The heat dissipation assembly also includes heat dissipation fins 11, which are disposed on the upper inner side of the outer casing 2 and are fixedly connected to the top of the lidar body 1. One end of the heat dissipation channel 12 on the surface of the heat dissipation fin 11 faces the air inlet channel 3, and the other end of the heat dissipation channel 12 faces the air outlet 13 opened on the outer casing 2. A ramp 14 is provided inside the air inlet channel 3, with the top of the ramp 14 facing the heat dissipation fin 11 and the bottom of the ramp 14 facing the air inlet plate 4. Drainage grooves 15 are opened at the bottom of the air inlet plate 4 and the switch plate 6.

[0027] By setting up heat dissipation components, the function is to efficiently dissipate the heat generated during the operation of the lidar. The outer shell 2 provides protection for the main body 1 of the lidar and creates a heat dissipation space. In environments with excessively low temperatures, the outer shell 2 can also provide insulation. The air intake channels 3 on both sides of the outer shell 2 can introduce high-speed airflow generated by the vehicle's movement. In conjunction with the heat dissipation fins 11 connected to the top of the lidar body 1, the airflow flows through the heat dissipation channels 12 on the surface of the heat dissipation fins 11 and is discharged from the air outlet 13, quickly removing the heat from the core components. The ramp 14 in the air intake channel 3 can guide the airflow to the heat dissipation fins 11 precisely to enhance the heat exchange efficiency. The drainage grooves 15 at the bottom of the air intake plate 4 and the switch plate 6 can drain the infiltrated rainwater. The whole system achieves efficient heat dissipation by actively utilizing the airflow from the vehicle's movement, while also providing protection.

[0028] It also includes a switch assembly for controlling the heat dissipation components. The switch assembly includes a switch plate 6, which has an air inlet groove 5 that is identical to the surface of the air inlet plate 4. The switch plate 6 and the inner side of the air inlet plate 4 are sealed and slidably engaged. The top of the switch plate 6 is fixedly connected to one end of the connecting rod 7. The other end of the connecting rod 7 is fixedly installed on both sides of the inclined block 8. The inclined surface of the inclined block 8 abuts against the unlocking block 9. The unlocking block 9 is fixedly connected to the telescopic end of the electric push rod 10. Two sets of guide seats 16 are fixedly installed on both sides of the switch plate 6. The guide seats 16 are slidably installed on the surface of the guide rod 17. The two ends of the guide rod 17 are fixed to the inner wall of the air inlet channel 3 through the mounting seat 18. A spring 19 is slidably sleeved on the surface of the guide rod 17. The top of the spring 19 abuts against the upper mounting seat 18, and the bottom of the spring 19 abuts against the guide seat 16. The electric push rod 10 is fixedly installed on the top of the radar body 1 and electrically connected to the controller. The electric push rod 10 is waterproofed. The unlocking block 9 is slidably engaged with the top of the radar.

[0029] By setting up a switch assembly, the function is to dynamically control the opening and closing of the air inlet channel 3 according to the ambient and equipment temperature, so as to realize the intelligent switching between heat dissipation and heat preservation. The switch plate 6 and the air inlet plate 4 are sealed and slidingly engaged. The air inlet groove 5 on its surface can guide airflow when aligned and block the channel when misaligned. The electric push rod 10 pushes the unlocking block 9 under the command of the controller. Through the contact engagement with the inclined block 8, it drives the connecting rod 7 and the switch plate 6 to slide upward along the guide rod 17. The spring 19 provides the reset elasticity when the electric push rod 10 is reset, ensuring that the switch plate 6 resets downward after losing the push force. When the temperature is too low, the switch assembly closes the air inlet channel 3 to reduce heat exchange and avoid the radar body 1 from being too cold and the internal heating element from working too much. When the temperature is high, the channel is opened to ensure heat dissipation, thereby balancing the working stability of the equipment under different temperature environments.

[0030] The controller adopts a modular integrated design, encapsulated in a waterproof and dustproof housing. Its core hardware includes a temperature acquisition module (an automotive-grade NTC thermistor for ambient temperature measurement and a surface-mount PT1000 platinum resistance thermometer for radar body temperature measurement), a main control module composed of an automotive-grade MCU, a driver module composed of H-bridge driver chips, a DC-DC step-down power supply module, and a CAN bus communication module. All modules are connected via an FR-4 PCB board, forming a power supply path (vehicle-grade 12V to 5V and 12V power supply), a signal acquisition path (sensor signals transmitted to the main controller), and a control output path (main controller). The control and drive module controls the electric push rod 10 and the communication path (CAN bus connected to the vehicle system), and the key nodes have filter capacitors to prevent interference; the software is layered. After power-on, it first performs a self-test and opens the air intake channel 3 by default. It collects the temperature every 100ms and controls the electric push rod 10 to open and close the air intake channel 3 according to the preset threshold (e.g., the heat dissipation is turned on when the main body temperature is >45℃ and the heat dissipation is turned off when the ambient temperature is <-10℃). When a fault occurs, it outputs a code to report and resets the push rod. The whole system can monitor the temperature in real time and drive the switching components to achieve automatic opening and closing of the air intake channel 3 to adapt to the heat dissipation requirements of the LiDAR vehicle.

[0031] In practical use, after installing the device in the designated location, the controller will monitor the ambient temperature and the temperature of the radar body 1 in real time through the temperature acquisition module during daily use. When the temperature of the radar body 1 is lower than the preset threshold, the controller will drive the electric push rod 10 to extend, which will drive the unlocking block 9 to push the inclined block 8 upward, so that the connecting rod 7 pulls the switch plate 6 to slide upward along the guide rod 17, so that the switch plate 6 and the air inlet slot 5 of the air inlet plate 4 are completely misaligned, thereby closing the air inlet channel 3, reducing the heat exchange between the radar body 1 and the external low temperature environment, and preventing the internal heating element from working continuously at high power. If the ambient temperature is higher than the preset threshold, the controller will control the electric push rod 10 to retract, the unlocking block 9 to reset, and the switch plate 6 to slide downward along the guide rod 17 under the elastic force of the spring 19, so that the switch plate 6 and the air inlet slot 5 of the air inlet plate 4 are completely aligned. At this time, the high-speed airflow generated by the car will enter the interior of the outer shell 2 through the air inlet channel 3, flow through the heat dissipation channel 12 on the surface of the heat dissipation fins 11 and be discharged from the air outlet 13, achieving efficient heat dissipation.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation structure for a lidar device, comprising a lidar body (1), characterized in that: It also includes a heat dissipation assembly disposed on the outside of the radar body (1), and a switch assembly for controlling the heat dissipation assembly; The heat dissipation assembly includes an outer casing (2), which is fixedly connected to the sides and top of the radar body (1) by screws. Two sets of air intake channels (3) are provided on both sides inside the outer casing (2). An air intake plate (4) is fixedly installed at the air intake of the air intake channel (3). Air intake slots (5) are equidistantly opened on the surface of the air intake plate (4). The switch assembly includes a switch plate (6), which has an air inlet groove (5) that is the same as the surface of the air inlet plate (4). The switch plate (6) and the inner side of the air inlet plate (4) are sealed and slidably fitted. The top of the switch plate (6) is fixedly connected to one end of the connecting rod (7). The other end of the connecting rod (7) is fixedly installed on both sides of the inclined block (8). The inclined surface of the inclined block (8) abuts against the unlocking block (9). The unlocking block (9) is fixedly connected to the telescopic end of the electric push rod (10).

2. The heat dissipation structure for a lidar device according to claim 1, characterized in that: The heat dissipation assembly also includes heat dissipation fins (11), which are disposed on the upper inner side of the outer casing (2) and are fixedly connected to the top of the radar body (1).

3. The heat dissipation structure for a lidar device according to claim 2, characterized in that: One end of the heat dissipation channel (12) on the surface of the heat dissipation fin (11) faces the air inlet channel (3), and the other end of the heat dissipation channel (12) faces the air outlet (13) opened on the outer casing (2).

4. The heat dissipation structure for a lidar device according to claim 1, characterized in that: The air intake channel (3) is provided with a ramp (14) inside, and the top of the ramp (14) faces the heat dissipation fins (11).

5. The heat dissipation structure for a lidar device according to claim 4, characterized in that: The bottom of the ramp (14) faces the air inlet plate (4), and the bottom of the air inlet plate (4) and the switch plate (6) are provided with drainage grooves (15).

6. The heat dissipation structure for a lidar device according to claim 1, characterized in that: Two sets of guide seats (16) are fixedly installed on both sides of the switch plate (6). The guide seats (16) are slidably installed on the surface of the guide rod (17). The two ends of the guide rod (17) are fixed to the inner wall of the air inlet channel (3) through the mounting seat (18).

7. The heat dissipation structure for a lidar device according to claim 6, characterized in that: A spring (19) is slidably sleeved on the surface of the guide rod (17). The top of the spring (19) abuts against the mounting seat (18) above, and the bottom of the spring (19) abuts against the guide seat (16).

8. The heat dissipation structure for a lidar device according to claim 1, characterized in that: The electric push rod (10) is fixedly installed on the top of the radar body (1) and electrically connected to the controller, and the unlocking block (9) is slidably engaged with the top of the radar.

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