Radar dust removal device for mining vehicles

Abstract

This utility model discloses a radar dust removal device for mining vehicles, belonging to the field of radar equipment technology. The radar dust removal device includes: a driver for extracting fresh air for dust removal; a first dust removal duct, having an internal hollow structure with openings at both ends forming a first air inlet and a first air outlet, the first air inlet being fixedly connected to the output end of the driver via a connecting pipe; and a second dust removal duct, having an internal hollow structure with openings at both ends forming a second air inlet and a second air outlet, the second air inlet being fixedly connected to the first air outlet, the second air outlet being located near the radar sensing surface; the air outlet cross-sectional area of ​​the first hollow structure is smaller than its air inlet cross-sectional area; the air outlet cross-sectional area of ​​the second hollow structure is smaller than the air outlet cross-sectional area of ​​the first hollow structure; the fresh air for dust removal passes through the first and second dust removal ducts and is then blown out from the second air outlet to the radar sensing surface for dust removal. This utility model's radar dust removal device improves dust removal efficiency through its duct structure.

Description

Technical Field

[0001] This utility model relates to the field of radar equipment technology, and in particular to a radar dust removal device for mining vehicles. Background Technology

[0002] Vehicle radar equipment, such as automotive lidar, is constantly exposed to the environment during vehicle use. When dust or dirt accumulates on the radar surface, especially the sensing surface used to detect and receive information, and is not cleaned promptly and effectively, the radar's sensing accuracy will decrease, leading to signal transmission deviations. This is particularly problematic for autonomous mining vehicles, potentially causing misjudgments by the driving system. All of these issues can pose safety risks to mining vehicles during operation, and may even result in accidents.

[0003] Common methods for dust removal or cleaning of vehicle-mounted lidar typically involve designing an external structure around the lidar unit to secure and protect it. One part of this external structure consists of cleaning fluid piping with several cleaning nozzles, while another part consists of gas piping with several air nozzles. When cleaning is required, cleaning fluid is first sprayed through the nozzles to clean the lidar unit, followed by air jets from the nozzles to dry any remaining cleaning fluid.

[0004] Clearly, the aforementioned dust removal or cleaning methods involve liquid and gas pipelines, and these pipelines typically include complex connections between bent and straight sections, valves, and pumps. On the one hand, the high complexity of the pipeline connections increases the number of potential system failure points; on the other hand, in the complex operating environment of mining vehicles, these components or their connections are more prone to damage. Therefore, such cleaning devices are highly susceptible to air or liquid leaks in the pipelines, which in turn affects the normal operation of the radar itself.

[0005] In view of this, there is a need for a new type of radar dust removal device for mining vehicles to solve all or part of the above problems. Utility Model Content

[0006] To address at least one of the aforementioned problems and deficiencies in the existing technology, embodiments of this utility model provide a radar dust removal device for mining vehicles. This device utilizes a motor to deliver fresh air for dust removal, which is then guided out through a dust removal duct to the radar sensing surface to achieve gas dust removal. This eliminates the need for a liquid cleaning circuit, simplifies the structure of the dust removal device, and improves dust removal efficiency. The technical solution is as follows:

[0007] According to one aspect of the present invention, a radar dust removal device for mining vehicles is provided.

[0008] The radar dust removal device includes:

[0009] A drive used to extract fresh air for dust removal;

[0010] The first dust removal air duct has a first hollow structure inside, with openings at both ends forming a first air inlet and a first air outlet; wherein the first air inlet is fixedly connected to the output end of the driver through a connecting pipe.

[0011] The second dust removal duct has a second hollow structure inside, with openings at both ends forming a second air inlet and a second air outlet; the second air inlet is fixedly connected to the first air outlet, and the second air outlet is located near the sensing surface of the radar.

[0012] The air outlet cross-sectional area of ​​the first hollow structure is smaller than its air inlet cross-sectional area; the air outlet cross-sectional area of ​​the second hollow structure is smaller than the air outlet cross-sectional area of ​​the first hollow structure;

[0013] The fresh air for dust removal passes through the first and second dust removal ducts in sequence and is then blown out from the second air outlet to the radar's sensing surface for dust removal.

[0014] In some embodiments, specifically, a bend is provided in the middle of the first dust removal duct, which makes the first hollow structure an L-shaped duct; the first air inlet and the first air outlet are respectively provided at both ends of the L-shaped duct.

[0015] In some embodiments, the air outlet cross-sectional area of ​​the first hollow structure is further 1 / 3 to 1 / 2 of the cross-sectional area of ​​the first hollow structure at the bend.

[0016] In some embodiments, specifically, the second dust removal duct includes a first guide plate and a second guide plate fixedly connected to the first air outlet of the first dust removal duct; the first guide plate and the second guide plate surround to form a second hollow structure; one end of the first guide plate and the second guide plate fixedly connected to the first air outlet surrounds to form a second air inlet, and the other end of the first guide plate and the second guide plate surrounds to form a second air outlet.

[0017] In some embodiments, the first and second guide plates are arc-shaped plates; the air outlet section of the second hollow structure is an arc-shaped section; the second dust removal duct surrounds the radar; and the second air outlet faces the radar's sensing surface.

[0018] In some embodiments, further, along the direction of the fresh air blowing out of the dust removal system, the first guide vane is positioned away from the radar and is set higher than the second guide vane by a preset height difference; the first guide vane is inclined towards the second guide vane at one end of the second air outlet; the air outlet cross-sectional area of ​​the second hollow structure is 1 / 3 to 1 / 2 of the air outlet cross-sectional area of ​​the first hollow structure.

[0019] In some embodiments, specifically, the driver includes a drive motor and a fan; further, the drive motor is a high-speed brushless motor, and the fan is fixedly connected to the input terminal of the high-speed brushless motor.

[0020] In some embodiments, the driver further includes a motor cover covering the drive motor and the fan, and a dustproof window disposed on the motor cover; further, the motor cover is provided with an air outlet corresponding to the output end of the drive motor; further, the dustproof window is disposed on the surface of the motor cover near the input end of the drive motor, and a filter is disposed inside the dustproof window.

[0021] In some embodiments, the radar dust removal device further includes a first bracket and a second bracket arranged together; further, a driver, a connecting pipe, a first dust removal duct and a second dust removal duct are fixedly installed on the first surface of the first bracket, and the second surface of the first bracket is fixedly connected to the third surface of the second bracket; further, a radar is fixedly installed on the third surface of the second bracket and near the second dust removal duct, and the fourth surface of the second bracket is fixedly connected to the mining vehicle.

[0022] In some embodiments, the connecting pipe specifically includes a flexible pipe, one end of which is sealed to the air outlet of the motor cover, and the other end of which is sealed to the first air inlet of the first dust removal duct; further, the connecting pipe also includes at least one pipe clamp with a detachable structure, which is sleeved on the flexible pipe.

[0023] The radar dust removal device for mining vehicles provided by the embodiments of this utility model has at least one or a portion of the following advantages:

[0024] (1) The radar dust removal device for mining vehicles provided in the embodiments of this utility model realizes gas dust removal through the driver and dust removal duct, eliminating the need for liquid cleaning structure and complex pipeline structure, which facilitates the installation of radar dust removal device and improves dust removal efficiency.

[0025] (2) The radar dust removal device for mining vehicles provided in the embodiments of this utility model uses a drive motor to drive a fan to deliver air, which eliminates the need for air pumps, air valves and excessive air pipes, further simplifying the structure of the radar dust removal device. The drive motor and fan can be selected from conventional products, further saving manufacturing and maintenance costs, while extending the overall service life of the radar dust removal device.

[0026] (3) The radar dust removal device for mining vehicles provided in the embodiment of this utility model has a bent structure design for the first dust removal duct, which plays a role in guiding and gathering the dust removal fresh air. Under the condition that the air supply volume remains unchanged, it can effectively increase the flow velocity of the dust removal fresh air and ensure the flow stability.

[0027] (4) The radar dust removal device for mining vehicles provided in the embodiment of this utility model is designed with an arc cross section for the structure of the second dust removal duct and the structure of the radar and its sensing surface, so that the air outlet cross section is greatly reduced and converged to the radar sensing surface, which plays a role in increasing the air outlet speed and improving the dust removal efficiency.

[0028] (5) The radar dust removal device for mining vehicles provided in the embodiments of this utility model can adjust the dust removal fresh air flow performance by uniformly or separately adjusting the cross-sectional structure, cross-sectional area and other parameters of the inlet and outlet of the two dust removal air ducts and the key middle position, and can be matched with different models of radar for personalized design.

[0029] (6) The radar dust removal device for mining vehicles provided in the embodiment of this utility model arranges the first guide plate and the second guide plate of the second dust removal air duct at a high degree of misalignment and forms an arc-shaped second air outlet, so that the final air outlet direction is as close as possible to the radar sensing surface, effectively utilizing the dust removal fresh air and improving the dust removal efficiency.

[0030] (7) The radar dust removal device for mining vehicles provided in the embodiments of this utility model can filter out impurities in the dust removal fresh air in advance by setting a dustproof window and filter on the motor cover, thereby improving the cleanliness of the dust removal fresh air entering the radar dust removal device, protecting the drive motor and radar, ensuring the working stability of the drive motor and radar, extending the service life of the radar dust removal device, and reducing maintenance and repair.

[0031] (8) The radar dust removal device for mining vehicles provided in the embodiments of this utility model fixes the driver and two dust removal ducts together with the radar through the bracket, making the radar dust removal device compact in structure and also convenient for troubleshooting and replacement of parts.

[0032] (9) The radar dust removal device for mining vehicles provided in the embodiments of this utility model connects the driver and the first dust removal duct in a sealed manner through a flexible tube, which can avoid the stress caused by the vibration of the mining vehicle during operation and at the same time buffer the vibration and extend the service life of the radar dust removal device. Attached Figure Description

[0033] These and / or other aspects and advantages of this invention will become apparent and readily understood from the following description of preferred embodiments taken in conjunction with the accompanying drawings, in which:

[0034] Figure 1 This is a schematic diagram of a radar dust removal device according to an embodiment of the present invention;

[0035] Figure 2 for Figure 1 An exploded view of the structure of the radar dust removal device shown.

[0036] Figure 3 for Figure 1 Enlarged longitudinal cross-sectional view of the first and second dust removal ducts in the radar dust removal device shown.

[0037] Figure 4 for Figure 3 The bottom view of the structure of the first and second dust removal ducts shown;

[0038] Figure 5 The diagram shows the simulation results of the flow pattern of the fresh air for dust removal in the first and second dust removal ducts of the radar dust removal device according to Embodiment 1 of this utility model. Detailed Implementation

[0039] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of this utility model with reference to the accompanying drawings is intended to explain the overall inventive concept of this utility model and should not be construed as a limitation thereof.

[0040] Taking various lidar systems used in mining vehicles as an example, during their daily operations, the radar itself is exposed to the working environment. If it is not cleaned, dust, particles, and other contaminants will accumulate on its sensing surface. This will prevent the sensing surface from properly perceiving the surrounding environment, thus severely reducing the radar's sensing accuracy. Decreased radar sensing accuracy or the inability to obtain accurate perception data will affect driving, especially in the scenario of unmanned mining vehicles. If the radar cannot provide accurate perception data in a timely manner, it will seriously affect the autonomous driving system's judgment of road conditions and the environment, potentially leading to serious accidents.

[0041] The contaminants affecting the surface smoothness of lidar mainly include dust, dirt, particulate matter, and other environmental pollutants. Theoretically, gas-blown dust removal can meet the requirements for lidar dust removal. Based on this, this invention proposes a novel lidar dust removal device for mining vehicles. This device uses a blower motor to introduce fresh air into a combined dust removal duct, delivering it to the lidar sensing surface to achieve dust removal. This simplifies the dust removal structure and improves its stability and reliability, thereby increasing dust removal efficiency.

[0042] See Figure 1 This illustration shows a radar dust removal device 100 for mining vehicles, an embodiment of the present invention, used for blowing air to remove dust from a radar 200 installed on a mining vehicle (not shown). See also Figure 2 It shows that according to Figure 1 An exploded view of the structure of the radar dust removal device 100 shown. (Combined with...) Figure 1 and Figure 2 As shown, the radar dust removal device 100 mainly consists of six parts: a driver 10, a connecting pipe 20, a first dust removal duct 30, a second dust removal duct 40, a first bracket 50, and a second bracket 60. Specifically, the driver 10 is fixedly and sealed to the first dust removal duct 30 via the connecting pipe 20, and the first dust removal duct 30 is fixedly connected to the second dust removal duct 40 to form a combined dust removal duct. The driver 10 draws in fresh air for dust removal and sends it into the interconnected air supply channel formed by the first dust removal duct 30 and the second dust removal duct 40. The fresh air delivered from the second dust removal duct 40 removes dust from the sensing surface of the radar 200. The first bracket 50 is used to fix and support the driver 10, the connecting pipe 20, the first dust removal duct 30, and the second dust removal duct 40. The second bracket 60 is fixedly connected to the mining vehicle on one hand, and provides fixed installation positions for the radar 200 and the first bracket 50 on the other hand. After the above-mentioned parts are fixedly assembled together, the overall radar dust removal device 100 and radar 200 can be fixed in the designated position of the mining vehicle (such as the top, front, or rear of the vehicle), and the radar dust removal device 100 can perform gas blowing dust removal on the radar 200.

[0043] Further, see Figure 3 It shows that according to Figure 1 The diagram shows a cross-sectional view of the structure of the radar dust removal device 100, which comprises a first dust removal duct 30 and a second dust removal duct 40 forming a connected air supply channel. (In conjunction with...) Figures 1-3 As shown, the first dust removal duct 30 has a hollow internal structure with openings at both ends forming a first air inlet 31 and a first air outlet 32; the first air inlet 31 is fixedly connected to the output end of the driver 10 via a connecting pipe 20. The second dust removal duct 40 has a hollow internal structure with openings at both ends forming a second air inlet 43 and a second air outlet 44. The second air inlet 43 and the first air outlet 32 ​​are fixed together, thus connecting the first dust removal duct 30 and the second dust removal duct 40 together. The second air outlet 44 is located near the sensing surface of the radar 200.

[0044] Furthermore, in order to effectively regulate the flow performance (such as air volume, air velocity, turbulence pattern, flow resistance, etc.) of the fresh air in the air supply duct, it is necessary to set the cross-sectional area at key sections of the air supply duct. For example... Figure 3As shown, in principle, the air outlet cross-sectional area of ​​the first hollow structure of the first dust removal duct 30 (at the first air outlet 32) should be smaller than its air inlet cross-sectional area (at the first air inlet 31); the air outlet cross-sectional area of ​​the second hollow structure of the second dust removal duct 40 (at the second air outlet 44) should be smaller than the air outlet cross-sectional area of ​​the first hollow structure of the first dust removal duct 30 (the first air outlet 32 ​​is also the second air inlet 43). With the above arrangement, the volume of fresh air sent from the second air outlet 44 after sequentially passing through the first dust removal duct 30 and the second dust removal duct 40 is increased. Simultaneously, the fact that the second air outlet 44 is close to the sensing surface of the radar 200 further ensures that the fresh air can be delivered to the sensing surface of the radar 200 to the maximum extent, thereby achieving efficient gas delivery and dust removal.

[0045] In one example, combined Figure 1 and Figure 2 As shown, the driver 10 includes a drive motor 11 and a fan 12. Alternatively, the drive motor 11 can be a stepper motor, AC motor, DC motor, permanent magnet DC motor, brushless motor, asynchronous motor, etc. Preferably, the drive motor 11 uses a high-speed brushless motor and is equipped with a low-voltage DC power supply. Using a high-speed brushless motor allows for precise current control through its internal electronic controller, and its high efficiency, low noise, and long service life make it more suitable for radar dust removal in mining vehicles operating in complex environments. More preferably, the fan 12 is fixedly connected to the input end of the high-speed brushless motor, such as an axial fan, centrifugal fan, DC fan, etc., with a preferred choice being an axial fan that is low in noise and has good stability. The drive motor 11 drives the fan 12 to rotate, delivering fresh air for dust removal into the air supply channel composed of the first dust removal duct 30 and the second dust removal duct 40. The selection of the drive motor 11 and the fan 12 here are only some illustrative examples and should not be construed as a limitation of this utility model by those skilled in the art.

[0046] In one example, such as Figure 2As shown, the driver 10 further includes a motor cover 13 covering the drive motor 11 and the fan 12, and a dustproof window 14 disposed on the motor cover 13. Specifically, the motor cover 13 has an air outlet 131 corresponding to the output end of the drive motor 11 (right side of the motor cover 13 in the figure). The dustproof window 14 is disposed on the surface of the motor cover 13 near the input end of the drive motor 11 (left side of the motor cover 13 in the figure). In order to effectively filter the dust-removing fresh air and make the dust-removing fresh air entering the radar dust removal device 100 have a high degree of cleanliness, a filter 141 is disposed in the dustproof window 14. Alternatively, such as a mesh filter, paper filter, magnetic filter, electrostatic precipitator, etc., the filter is preferably embedded in the dustproof window 14 through a frame structure. The embedded mesh filter can be one, two or more layers, and each layer can also be set with different filtration densities to improve the filtration effect and maintain the cleanliness of the dust-removing fresh air. This example only provides some illustrative examples of the filter 141, and those skilled in the art should not understand it as a limitation of this utility model.

[0047] In one example, such as Figure 2 As shown, the connecting pipe 20 is used to fix and seal the output end of the driver 10 (the air outlet 131 of the motor cover 13) and the input end (the first air inlet 31) of the first dust removal duct 30. Specifically, the connecting pipe 20 includes a flexible pipe 21, one end of which is sealed to the air outlet 131 of the motor cover 13 of the driver 10, and the other end of which is sealed to the first air inlet 31 of the first dust removal duct 30.

[0048] In one example, the flexible tube 21 can alternatively be, for example, a corrugated pipe, a rubber hose, a hose connector, or a metal pipe with a flexible interface. Preferably, a rubber hose is used as the flexible tube 21. Using the flexible tube 21 can effectively reduce the manufacturing or selection costs of components and maintenance costs caused by rigid connections of metal pipe sections, and can also reduce the weight of the radar dust removal device 100 to a certain extent. Typically, the flexible pipe section or flexible connector itself is elastic. Therefore, when using the flexible tube 21, on the one hand, the seal between the air outlet 131 of the motor cover 13 and the first air inlet 31 of the first dust removal duct 30 can be ensured, and on the other hand, the impact of vibration on the various components and the connections between components in the radar dust removal device 100 during the movement or operation of mining vehicles can be mitigated, such as the detachment or breakage of connections between components caused by the vibration of mining vehicles, thereby reducing maintenance and repair costs.

[0049] In one example, further, to secure the flexible tube 21 and prevent it from detaching from the sealed connection due to vibrations from the movement or operation of mining vehicles, the connecting fitting 20 also includes at least one detachable clamp 22, which is fitted onto the flexible tube 21. Alternatively, Figure 2 A pipe clamp 22 is shown, which is divided into an upper part 221 and a lower part 222, both with a recess in the middle. After the two ends of the flexible tube 21 are connected to the driver 10 and the first dust removal duct 30 respectively, the lower part 222 of the pipe clamp 22 is used to lock the lower part of the flexible tube 21 through its middle recess, and the upper part 221 of the pipe clamp 22 is used to lock the upper part of the flexible tube 21 through its middle recess, corresponding to the position of the lower part 222. Finally, the upper part 221 and the lower part 222 are connected and fixed by, for example, a fixing screw to secure the flexible tube 21. Afterwards, the bottom of the pipe clamp 22 is fixedly mounted on the first bracket 50 to complete the fixation of the flexible tube 21.

[0050] In one example, alternatively, two, three or more pipe clamps 22 may be provided, for example, to clamp the flexible pipe 21 at the sealed connection between the driver 10 or the flexible pipe 21 at the sealed connection between the first dust removal duct 30, in order to prevent the flexible pipe 21 from falling off the sealed connection due to vibration of the mining vehicle.

[0051] In one example, the design of the connecting pipe 20, and the design and layout of, for example, the selection of the flexible pipe 21, the shape, quantity, and position of the pipe clamp 22, are provided only as illustrative examples and should not be construed as a limitation of this utility model. Those skilled in the art will understand that more detailed designs are needed based on the actual usage scenarios of mining vehicles and radar.

[0052] In one example, such as Figure 3 As shown, alternatively, a bend is provided in the middle of the first dust removal duct 30, which makes the first hollow structure an L-shaped duct. In this case, the first air inlet 31 and the first air outlet 32 ​​are respectively located at both ends of the L-shaped duct. According to basic theoretical calculations or empirical calculations of gas flow in the duct, theoretically, in the first dust removal duct 30, the air outlet cross-sectional area of ​​the first hollow structure is usually 1 / 3 to 1 / 2 of the cross-sectional area of ​​the first hollow structure at the bend.

[0053] In one example, further, along the flow direction of the fresh air, a second dust removal duct 40 is connected after the first dust removal duct 30. The second dust removal duct 40 includes a first guide plate 41 and a second guide plate 42 fixedly connected to the first air outlet 32 ​​of the first dust removal duct 30. The first guide plate 41 and the second guide plate 42 surround to form a second hollow structure. One end of the first guide plate 41 and the second guide plate 42 fixedly connected to the first air outlet 32 ​​surrounds to form a second air inlet 43, and the other end of the first guide plate 41 and the second guide plate 42 surrounds to form a second air outlet 44.

[0054] See Figure 4 The image shows a bottom view of the structure of the second dust removal duct 40. Combined with... Figure 3and Figure 4 As shown, alternatively, the first guide vane 41 and the second guide vane 42 are arc-shaped plates, and the air outlet section of the second hollow structure is an arc-shaped section. For example... Figure 3 As shown, the second dust removal duct 40 is arranged around the top of the radar 200 and the second air outlet 44 of the second dust removal duct 40 faces the sensing surface of the radar 200.

[0055] In one example, such as Figure 3 As shown, alternatively, along the direction of the fresh air blowing out of the dust removal system, the first guide vane 41 is positioned away from the radar 200 and higher than the second guide vane 42 by a preset height difference; the first guide vane 41 is inclined towards the second guide vane 42 at one end of the second air outlet 44. Similar to the design of the first dust removal duct 30, based on basic theoretical calculations or empirical calculations of gas flow in the duct, theoretically, the air outlet cross-sectional area of ​​the second hollow structure is 1 / 3 to 1 / 2 of the air outlet cross-sectional area of ​​the first hollow structure. Meanwhile, the preset height difference is not a fixed value or a fixed range; the specific value needs to be precisely designed according to the actual usage scenario of the radar. (A relatively specific design parameter is given below through Example 1.)

[0056] In one example, combined Figure 1 and Figure 2 As shown, alternatively, the radar dust removal device 100 also includes a first bracket 50 and a second bracket 60 arranged together. The first bracket 50 is mainly used for fixing and installing the driver 10, the connecting pipe 20, the first dust removal duct 40, and the second dust removal duct 50, while the second bracket 60 is mainly used for fixing and installing the radar 200. Simultaneously, the first bracket 50 is mounted on the second bracket 60, and the second bracket 60 is mounted on the mining vehicle.

[0057] In one example, such as Figure 2 As shown, specifically, the first bracket 50 has a first surface 51 and a second surface 52, and the second bracket 60 has a third surface 61 and a fourth surface 62. Alternatively, the components of the radar dust removal device 100 can be installed in designated positions by providing positioning holes and using bolts for locking. Of course, those skilled in the art will understand that there are many common methods of mechanical assembly, including plug-in methods, welding methods, adhesive methods, etc., in addition to bolt and positioning hole assembly. This example only provides some illustrative examples and should not be construed as a limitation of this utility model.

[0058] Further, firstly, the driver 10, connecting pipe 20 (including the pipe clamp 22 which can be fixedly installed on the first surface 51 of the first bracket 50), the first dust removal duct 30, and the second dust removal duct 40 are fixedly installed on the first surface 51 of the first bracket 50. Then, the second surface 52 of the first bracket 50 is fixedly connected to the third surface 61 of the second bracket 60. Next, the radar 200 is fixedly installed on the third surface 61 of the second bracket 60 near the second dust removal duct 40. At this time, the second air outlet 44 of the second dust removal duct 40 needs to face the sensing surface of the radar 200 to ensure that the fresh air from the second air outlet 44 can blow across the sensing surface of the radar 200 to the maximum extent. Finally, the fourth surface 62 of the second bracket 60 is fixedly connected to the mining vehicle. The structure after assembly is as follows. Figure 1 As shown.

[0059] In one example, the specific installation position of the fourth surface 62 of the second bracket 60 needs to be determined according to the installation requirements of the mining vehicle for the radar 200, such as the rear, roof, or front of the mining vehicle. Meanwhile, the first bracket 50 and the second bracket 60 can be designed with different shapes according to the actual usage scenarios of the radar or the mining vehicle. Furthermore, the specific installation positions of the radar dust removal device 100 and the radar 200 can be adjusted according to the actual usage scenarios using methods such as bolt assembly. This allows the radar dust removal device 100 to have good adaptability to complex models, modified models, and unmanned mining vehicles.

[0060] Example 1

[0061] The radar dust removal device 100 uses a combined first dust removal duct 30 and second dust removal duct 40 to deliver airflow for dust removal from the radar's sensing surface. Therefore, there are certain requirements for the flow state and performance of the fresh air. In order to achieve the required flow state and performance of the fresh air, the structure of the first dust removal duct 30 and the second dust removal duct 40 needs to be designed specifically according to the actual radar dust removal operating conditions.

[0062] In some embodiments, when the actual radar dust removal conditions, such as the type or model of radar installed on mining vehicles, are different, it is necessary to optimize the design of the specific shape of the first dust removal duct 30 and the second dust removal duct 40 (e.g., whether the cross-section is square, rectangular or trapezoidal, the specific location of the bend in the first dust removal duct 30, the shape of the first guide plate 41 and the second guide plate 42 of the second dust removal duct 40, etc.), the cross-sectional shape and cross-sectional area ratio of multiple key locations (e.g., the first air inlet 31, the bend in the first dust removal duct 30, the first air outlet 32, the second air outlet 44, etc.), and the cross-sectional shape of the second air outlet 44, so that the dust removal fresh air can achieve the required flow rate, air volume, flow pattern, etc. For example, if the installation location of radar on a mining vehicle changes or the number of radars increases, then specific designs are needed for each part of the radar dust removal device 100, especially the first dust removal duct 30 and the second dust removal duct 40, based on factors such as whether the installation of the radar dust removal device 100 near the radar will affect the field of vision of the mining vehicle, whether it will obstruct other vehicle-mounted equipment (such as antennas, positioning systems, etc.), and whether it can simultaneously remove dust from two or more radars. In this embodiment, a commonly used vehicle-mounted lidar (DLR) for mining vehicles is addressed. Figure 1 The radar 200 shown illustrates the structural design of the first dust removal duct 30 and the second dust removal duct 40 of a specific radar dust removal device 100. The basic structure of the radar dust removal device 100 can be combined with... Figures 1-4 Please refer to the foregoing content, which will not be repeated here.

[0063] In one example, the air supply duct is manufactured using a seamless welding process. The first dust collection duct 30 is L-shaped, and the cross-sectional shape of its first hollow structure is square, such as a square, rectangle, or trapezoid. Alternatively, the shapes of each face of the first dust collection duct 30 can be cut from sheet metal parts, and then the faces can be seamlessly welded together to form a shape as shown. Figures 1-3 The shape shown.

[0064] Furthermore, combined Figure 3 and Figure 4 As shown, the second dust removal duct 40 includes an arc-shaped first guide plate 41 and a second guide plate 42, which are seamlessly welded to the first air outlet 32 ​​of the first dust removal duct 30. The first guide plate 41 and the second guide plate 42 are inclined inwards towards the second hollow structure, such that the cross-sectional area of ​​the second air inlet 43 of the second hollow structure is larger than the cross-sectional area of ​​its second air outlet 44. In other words, the inclination of the first guide plate 41 and the second guide plate 42 guides the flow of fresh air for dust removal, gradually reducing the outlet cross-section. Figure 4As shown, a small annular (semi-annular) cross-sectional shape is finally formed at the second air outlet 44. Reducing the cross-sectional area of ​​the second air outlet 44, on the one hand, further avoids possible air leakage during the flow of dust removal fresh air and increases the sealing of the air supply channel; on the other hand, it effectively ensures that, under the same total air volume, the small annular second air outlet 44 can further increase the wind speed and uniform airflow, so that the dust removal fresh air can act on the sensing surface of the radar 200 to the maximum extent and evenly.

[0065] In one example, specifically, combining Figure 1 and Figure 3 As shown, at the second air outlet 44, the lower end face of the second guide plate 42 is slightly lower than the upper surface (i.e., the sensing surface) of the radar 200, so that the second air outlet 44 forms a shape that wraps around the sensing surface of the radar 200 on one side of the second guide plate 42. Simultaneously, there is a gap of 2-5 mm, preferably 3 mm, between the lower end of the second guide plate 42 and the outermost edge of the sensing surface of the radar 200. Further, the first guide plate 41 is higher than the second guide plate 42 by a preset height difference. This preset height difference refers to the vertical distance from the lower end face of the first guide plate 41 to the lower end face of the second guide plate 42. Specifically, the lower end face of the first guide plate 41 is initially slightly higher than the lower end face of the second guide plate 42, while maintaining a distance of 1-5 mm, preferably 2 mm, between the lower end face of the first guide plate 41 and the sensing surface of the radar 200. Therefore, overall, the preset height difference ranges from 3 to 10 mm. By tilting the first guide plate 41 and the second guide plate 42, the minimum gap width d of the small annular cross-section of the second air outlet 44 reaches 1.5~3mm, preferably 2.5mm. The cross-section of this small annular ring can be as follows: Figure 4 The cross-sectional shape shown can be a cross-sectional shape with equal gap width d, or it can be a cross-sectional shape with unequal gap width d.

[0066] In one example, after obtaining the structural parameters of the second air outlet 44 based on the actual situation of the radar 200, the structural parameters of the second dust removal duct 40 and the first dust removal duct 30 can be calculated backward.

[0067] In one example, after obtaining the structural parameters of the first dust removal duct 30 and the second dust removal duct 40 through theoretical calculations, the flow performance of the fresh air in the first dust removal duct 30 and the second dust removal duct 40 can be simulated using fluid dynamics analysis software such as ANSYS and MATLAB. The simulation results are used to determine whether the fresh air meets the requirements for radar dust removal, and the structural parameters of the first dust removal duct 30 and the second dust removal duct 40, or the initial flow rate, velocity, and supply path of the fresh air, are adjusted to obtain the structural parameters of the radar dust removal device 100 under optimal dust removal effect. Finally, actual production and manufacturing are carried out based on the simulation results.

[0068] In one example, see Figure 5 The simulation results show the flow pattern and flow performance of the fresh air entering the first dust removal duct 30 and the second dust removal duct 40 of Example 1 with initial flow rate and velocity, and being delivered to the sensing surface of the radar 200 from the second air outlet 44. Figure 5 The flow path and velocity (wind speed) of the dust-removing fresh air obtained through simulation calculations are shown. It can be seen that when the dust-removing fresh air enters the first dust-removing duct 30 with a relatively low base velocity (blue portion), it first experiences a wind speed increase due to the airflow disturbance, particularly at the bend (the orange, yellow, and green mixed portion at the bend). Subsequently, it experiences a second wind speed increase after passing through the contraction and guidance of the second dust-removing duct 40 (the red portion near the second air outlet 44). Ultimately, this results in a higher wind speed for the dust-removing fresh air delivered to the sensing surface of the radar 200, thereby improving the radar's dust removal efficiency.

[0069] In one example, the radar 200 can typically communicate with the drive motor 11 in the radar dust removal device 100 via a circuit connection or a network connection. For example, when using a high-speed brushless motor, since it has its own internal circuit controller, it can be electrically connected to the circuit control module built into the radar 200. When the circuit control module of the radar 200 detects a decrease in the cleanliness of its sensing surface, it can directly control the drive motor 11 via the circuit connection or indirectly control it via the vehicle control system to start drawing in fresh air for dust removal. After the drive motor 11 starts, outside air is drawn into the radar dust removal device 100 through the dust cover 14 (and filtered by the filter 141), and the airflow is increased by the guidance of the first dust removal duct 30 and the second dust removal duct 40, and fresh air is delivered to the sensing surface of the radar 200 through the second air outlet 44 to complete the air supply and dust removal.

[0070] The radar dust removal device for mining vehicles provided by the embodiments of this utility model has at least one or a portion of the following advantages:

[0071] (1) The radar dust removal device for mining vehicles provided in the embodiments of this utility model realizes gas dust removal through the driver and dust removal duct, eliminating the need for liquid cleaning structure and complex pipeline structure, which facilitates the installation of radar dust removal device and improves dust removal efficiency.

[0072] (2) The radar dust removal device for mining vehicles provided in the embodiments of this utility model uses a drive motor to drive a fan to deliver air, which eliminates the need for air pumps, air valves and excessive air pipes, further simplifying the structure of the radar dust removal device. The drive motor and fan can be selected from conventional products, further saving manufacturing and maintenance costs, while extending the overall service life of the radar dust removal device.

[0073] (3) The radar dust removal device for mining vehicles provided in the embodiment of this utility model has a bent structure design for the first dust removal duct, which plays a role in guiding and gathering the dust removal fresh air. Under the condition that the air supply volume remains unchanged, it can effectively increase the flow velocity of the dust removal fresh air and ensure the flow stability.

[0074] (4) The radar dust removal device for mining vehicles provided in the embodiment of this utility model is designed with an arc cross section for the structure of the second dust removal duct and the structure of the radar and its sensing surface, so that the air outlet cross section is greatly reduced and converged to the radar sensing surface, which plays a role in increasing the air outlet speed and improving the dust removal efficiency.

[0075] (5) The radar dust removal device for mining vehicles provided in the embodiments of this utility model can adjust the dust removal fresh air flow performance by uniformly or separately adjusting the cross-sectional structure, cross-sectional area and other parameters of the inlet and outlet of the two dust removal air ducts and the key middle position, and can be matched with different models of radar for personalized design.

[0076] (6) The radar dust removal device for mining vehicles provided in the embodiment of this utility model arranges the first guide plate and the second guide plate of the second dust removal air duct at a high degree of misalignment and forms an arc-shaped second air outlet, so that the final air outlet direction is as close as possible to the radar sensing surface, effectively utilizing the dust removal fresh air and improving the dust removal efficiency.

[0077] (7) The radar dust removal device for mining vehicles provided in the embodiments of this utility model can filter out impurities in the dust removal fresh air in advance by setting a dustproof window and filter on the motor cover, thereby improving the cleanliness of the dust removal fresh air entering the radar dust removal device, protecting the drive motor and radar, ensuring the working stability of the drive motor and radar, extending the service life of the radar dust removal device, and reducing maintenance and repair.

[0078] (8) The radar dust removal device for mining vehicles provided in the embodiments of this utility model fixes the driver and two dust removal ducts together with the radar through the bracket, making the radar dust removal device compact in structure and also convenient for troubleshooting and replacement of parts.

[0079] (9) The radar dust removal device for mining vehicles provided in the embodiments of this utility model connects the driver and the first dust removal duct in a sealed manner through a flexible tube, which can avoid the stress caused by the vibration of the mining vehicle during operation and at the same time buffer the vibration and extend the service life of the radar dust removal device.

[0080] While some embodiments of the present general technical concept have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the present general technical concept, the scope of which is defined by the claims and their equivalents.

Claims

1. A radar dust removal device for mining vehicles, comprising: A drive used to extract fresh air for dust removal; The first dust removal duct has a first hollow structure inside, and the two ends of the first dust removal duct have openings to form a first air inlet and a first air outlet, wherein the first air inlet is fixedly connected to the output end of the driver through a connecting pipe. The second dust removal duct has a second hollow structure inside. The two ends of the second dust removal duct have openings to form a second air inlet and a second air outlet. The second air inlet is fixedly connected to the first air outlet, and the second air outlet is located near the sensing surface of the radar. The air outlet cross-sectional area of ​​the first hollow structure is smaller than its air inlet cross-sectional area; the air outlet cross-sectional area of ​​the second hollow structure is smaller than the air outlet cross-sectional area of ​​the first hollow structure. The fresh air for dust removal passes through the first dust removal duct and the second dust removal duct in sequence, and is then blown out from the second air outlet to the sensing surface of the radar for dust removal.

2. The radar dust removal device according to claim 1, characterized in that, A bend is provided in the middle of the first dust removal duct, and the bend makes the first hollow structure an L-shaped duct. The first air inlet and the first air outlet are respectively located at both ends of the L-shaped air duct.

3. The radar dust removal device according to claim 2, characterized in that, The air outlet cross-sectional area of ​​the first hollow structure is 1 / 3 to 1 / 2 of the cross-sectional area of ​​the first hollow structure at the bend.

4. The radar dust removal device according to claim 3, characterized in that, The second dust removal duct includes a first guide plate and a second guide plate that are fixedly connected to the first air outlet of the first dust removal duct; The first guide plate and the second guide plate surround each other to form the second hollow structure; The first and second guide plates are fixedly connected to the first air outlet at one end to form the second air inlet, and the other end of the first and second guide plates is fixedly connected to form the second air outlet.

5. The radar dust removal device according to claim 4, characterized in that, The first guide plate and the second guide plate are arc-shaped plates; The air outlet section of the second hollow structure is an arc-shaped section; The second dust removal duct is surrounded by radar; The second air outlet faces the radar's sensing surface.

6. The radar dust removal device according to claim 5, characterized in that, Along the direction of the fresh air blowing out of the dust removal system, the first guide vane is far away from the radar and is set higher than the second guide vane by a preset height difference; The first guide plate is inclined towards the second guide plate at one end of the second air outlet; The air outlet cross-sectional area of ​​the second hollow structure is 1 / 3 to 1 / 2 of the air outlet cross-sectional area of ​​the first hollow structure.

7. The radar dust removal device according to any one of claims 1-6, characterized in that, The driver includes a drive motor and a fan; The drive motor is a high-speed brushless motor, and the fan is fixedly connected to the input of the high-speed brushless motor.

8. The radar dust removal device according to claim 7, characterized in that, The driver also includes a motor cover surrounding the drive motor and the fan, and a dustproof window on the motor cover; wherein... The motor cover is provided with an air outlet corresponding to the output end of the drive motor; The dustproof window is disposed on the surface of the motor cover near the input end of the drive motor, and a filter is disposed inside the dustproof window.

9. The radar dust removal device according to claim 8, characterized in that, The radar dust removal device also includes a first bracket and a second bracket arranged together; wherein... The driver, connecting pipe, first dust removal duct and second dust removal duct are fixedly installed on the first surface of the first bracket. The second surface of the first bracket is fixedly connected to the third surface of the second bracket; The radar is fixedly installed on the third surface of the second bracket and near the second dust removal duct. The fourth surface of the second bracket is fixedly connected to the mining vehicle.

10. The radar dust removal device according to claim 9, characterized in that, The connecting pipe includes a flexible pipe, one end of which is sealed to the air outlet of the motor cover, and the other end of which is sealed to the first air inlet of the first dust removal duct. The connecting pipe fitting also includes a pipe clamp with a detachable structure, which is sleeved on the flexible pipe.

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