Vehicle-mounted sensing device positive pressure dust isolation and reverse blowing dust removal protection device and control method

Abstract

The present application relates to the technical fields of vehicle-mounted equipment protection, in particular to a positive pressure dust isolation and reverse blowing dust removal protection device for vehicle-mounted sensing equipment and a control method, which comprises a sensing equipment mounting bracket and a positive pressure dust isolation component, wherein the sensing equipment mounting bracket comprises a sensing equipment mounting bracket main body; a dynamic protection device is hingedly connected to the sensing equipment mounting bracket, and the dynamic protection device comprises a hydraulic cylinder, a protection assembly, an arc-shaped protection plate and a push rod; the present application can isolate dust in the surrounding environment through physical isolation and positive pressure airflow when an unmanned vehicle is parked and working, so as to avoid dust accumulation on the surface of the sensing equipment, eliminate the negative impact of dust on the sensing ability of the sensing equipment, and reduce the frequency of operation and maintenance and cleaning of the sensing equipment; on the other hand, the present application can protect the sensing equipment in a closed cavity when the unmanned vehicle is loading and unloading, so as to avoid the sensing equipment from being damaged by rolling stones and flying stones.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted equipment protection technology, specifically a positive pressure dust isolation and backflushing dust removal protection device and control method for vehicle-mounted sensing equipment. Background Technology

[0002] Autonomous driving technology is increasingly being used in enclosed environments such as mining areas and construction sites. However, these environments often have high dust concentrations and pose a risk of flying debris, which seriously threatens the vehicle's perception system. As core perception devices, lidar, cameras, and millimeter-wave radar require specific conditions to function properly: lidar must be completely exposed without any physical obstruction; cameras must have clean mirror surfaces; and millimeter-wave radar requires its casing to be made of wave-transparent materials.

[0003] Existing protective measures are mostly simple physical shielding or sealing, which are difficult to meet the three conflicting requirements of "unobstructed perception", "dynamic collision avoidance" and "active dust prevention" under harsh working conditions.

[0004] Therefore, existing vehicle perception systems have two major shortcomings. First, in high-dust environments, fine particulate matter continuously adheres to the sensor surfaces, especially the light-transmitting windows of lidar and cameras, leading to reduced detection range, blurred images, and a significant decrease in perception performance. This necessitates frequent shutdowns for cleaning, impacting operational efficiency. Second, during loading and unloading operations, flying stones or debris can easily directly impact exposed perception equipment, causing physical damage. LiDAR and similar equipment are expensive to manufacture and replace, and the failure of a single perception device can lead to the downtime of the entire vehicle, triggering a chain reaction. Summary of the Invention

[0005] The purpose of this invention is to provide a positive pressure dust isolation and backflushing dust removal protection device and control method for vehicle-mounted sensing equipment, so as to solve the problems mentioned in the background art.

[0006] Specifically, this invention addresses the insufficient protection of onboard sensing equipment in unmanned vehicles operating in harsh environments by providing a protective device for onboard sensing equipment in unmanned vehicles, incorporating positive pressure dust isolation, pulsed airflow backflushing dust removal, and dynamic protection. This device reduces dust accumulation on the surface of the sensing equipment during parking and operation of the unmanned vehicle, preventing obstruction of the sensing field of view; and it protects the sensing equipment from impact damage during loading and unloading processes where there is a risk of falling stones.

[0007] The objective of this invention can be achieved through the following technical measures:

[0008] A vehicle-mounted sensing device with positive pressure dust isolation and backflushing protection device includes a sensing device mounting bracket and a positive pressure dust isolation component, wherein the sensing device mounting bracket includes a sensing device mounting bracket body;

[0009] A dynamic protective device is hinged to the mounting bracket of the sensing device. The dynamic protective device includes a hydraulic cylinder, a protective assembly, an arc-shaped protective plate, and a push rod.

[0010] The hydraulic cylinder's telescopic end and the push rod are rotatably connected. Both ends of the push rod are fixedly connected to protective assemblies. The two protective assemblies are hinged to both sides of the sensing device mounting bracket. The protective assemblies adopt a swing arm design. An arc-shaped protective plate is fixedly connected to the end of the protective assembly away from the hydraulic cylinder. The arc-shaped protective plate is used to block the opening side of the sensing device mounting bracket body, forming a closed protective cavity together with the sensing device mounting bracket body.

[0011] The sensing device mounting bracket body is equipped with dust-proof buffer brushes around the opening, a position sensor is installed on the side of the sensing device mounting bracket body, and a long strip-shaped air inlet is opened on the top of the sensing device mounting bracket body.

[0012] The main body of the sensing device mounting bracket has hinge holes on both sides, and a mounting hole for mounting a position sensor is provided on one side of the main body of the sensing device mounting bracket.

[0013] The protective assembly has a hinge hole for the protective component. One end of the pin is fixed to the hinge hole of the protective component, and the other end is hinged to the hinge hole to realize the hinge connection between the protective assembly and the mounting bracket of the sensing device.

[0014] The hydraulic cylinder is rotatably connected to the external vehicle. The dynamic protection device also includes an electromagnetic hydraulic valve, which is connected to both ends of the hydraulic cylinder body through two hydraulic pipes to adjust the hydraulic pressure at both ends of the hydraulic cylinder body, thereby controlling the extension and retraction of the hydraulic cylinder.

[0015] The positive pressure dust isolation component is used to blow air into the inside of the sensing device mounting bracket and out from the opening side of the main body of the sensing device mounting bracket, forming a positive pressure airflow environment to prevent dust from entering the inside of the main body of the sensing device mounting bracket.

[0016] The positive pressure dust isolation component includes a positive pressure dust isolation component control switch, an air inlet with a filter, a long strip-shaped air outlet, a cross-flow fan body, an air outlet sealing strip, a motor, and a differential pressure sensor;

[0017] The cross-flow fan body is fixed to the top of the sensing device mounting bracket body. The air inlet with filter screen is opened on one side of the cross-flow fan body. The positive pressure dust isolation component control switch is installed on one side of the cross-flow fan body. The elongated air outlet is opened at the bottom of the cross-flow fan body. The air outlet sealing strip is fixedly connected to the inner wall of the elongated air outlet around the perimeter. The motor and differential pressure sensor are both installed on one side of the cross-flow fan body.

[0018] The protection device also includes a pulse airflow backflushing dust removal component, which includes an air compressor, an air tank, an electromagnetic pneumatic valve, and a nozzle. The air compressor, air tank, electromagnetic pneumatic valve, and nozzle are connected in sequence through pipes and are all fixed on the external vehicle. One end of the nozzle extends into the air compressor and is located inside the filter screen on the air inlet with the filter screen.

[0019] The electromagnetic pneumatic valve opens and closes alternately to form a pulsed airflow, which is used to repeatedly backflush the filter screen to remove dust from it.

[0020] The protection device also includes a control unit for controlling the operation of the positive pressure dust isolation and backflushing dust removal protection device of the present invention. The position sensor, differential pressure sensor, positive pressure dust isolation component control switch, electromagnetic hydraulic valve, and electromagnetic pneumatic valve are all electrically connected to the control unit.

[0021] To achieve the aforementioned objectives, the present invention also provides a control method for the above-mentioned vehicle-mounted sensing device with positive pressure dust isolation and backflushing protection, comprising the following steps:

[0022] S1. Obtain vehicle operation status information, including whether the vehicle is stopped, operating normally, or at the loading or unloading point.

[0023] S2. Based on the operation status information, control the extension or retraction of the dynamic protection device, control the start and stop of the positive pressure dust isolation component, and control the pulse backflushing action of the pulse airflow backflushing dust removal component.

[0024] S3. When the vehicle is in a stopped operation, loading or unloading state, enter the protection mode: control the electromagnetic hydraulic valve to extend the hydraulic cylinder, drive the protective assembly to block the opening side of the sensing device mounting bracket, and at the same time close the positive pressure dust isolation component and the pulse airflow back-blowing dust removal component.

[0025] S4. When the vehicle starts or switches from protection mode to working state, it enters the start mode: controls the electromagnetic hydraulic valve to retract the hydraulic cylinder, opens the positive pressure dust isolation component, and controls the electromagnetic pneumatic valve to open intermittently in pulse mode to back-blow the filter screen to remove dust.

[0026] S5. When the vehicle is in normal driving condition, it enters the normal working mode: the dynamic protection device is retracted, the positive pressure dust isolation component continues to operate, and the pulse airflow backflushing dust removal component is turned off.

[0027] The beneficial effects of this invention are as follows:

[0028] This invention can isolate dust from the surrounding environment by physical isolation and positive pressure airflow when the unmanned vehicle is parked and in operation, thereby preventing dust from accumulating on the surface of the sensing device, eliminating the negative impact of dust on the sensing device's sensing capabilities, and reducing the frequency of operation, maintenance, and cleaning of the sensing device.

[0029] On the other hand, the present invention can protect the sensing device in a closed cavity during the loading and unloading of unmanned vehicles, avoiding damage to the sensing device from rolling stones or flying rocks, thereby preventing vehicle downtime caused by damage to the sensing device and ultimately reducing operation and maintenance costs. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 yes Figure 1 Side view of the mounting bracket for the sensing device;

[0033] Figure 3 This is a schematic diagram of the mounting bracket for the sensing device in this invention.

[0034] Figure 4 This is a schematic diagram of the positive pressure dust isolation component in this invention.

[0035] Figure 5 This is a schematic diagram of the dynamic protection device mechanism in this invention.

[0036] Figure 6 This is a schematic diagram of the pulse airflow backflushing dust removal component in this invention.

[0037] Figure 7 This is a schematic diagram of the control unit system in this invention.

[0038] Figure 8 This is a schematic diagram of the intermittent operation of the pulse airflow backflushing dust removal component in this invention.

[0039] The attached figures are labeled as follows:

[0040] 1. Sensing device mounting bracket; 2. Positive pressure dust isolation component; 3. Dynamic protective device; 4. Pulse airflow backflushing dust removal component; 5. Control unit; 11. Sensing device mounting bracket body; 12. Dust-blocking buffer brush; 13. Position sensor; 111. Long strip-shaped air inlet; 112. Hinge hole; 113. Mounting hole; 21. Control switch for positive pressure dust isolation component; 22. Air inlet with filter; 23. Long strip-shaped air outlet; 24. Cross-flow fan body; 25. Air outlet sealing strip; 26. Motor; 27. Differential pressure sensor; 31. Protective assembly; 32. Hydraulic cylinder; 33. Hydraulic pipeline; 34. Electromagnetic hydraulic valve; 35. Pin shaft; 311. Protective component hinge hole; 312. Arc-shaped protective plate; 313. Push rod; 41. Air compressor; 42. Air tank; 43. Electromagnetic pneumatic valve; 44. Nozzle. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] The present invention will be further described below with reference to embodiments (see accompanying drawings):

[0043] like Figure 1 and Figure 2 As shown, the positive pressure dust isolation and backflushing dust removal protection device of the present invention, applied to the on-board sensing equipment of unmanned vehicles, includes a sensing equipment mounting bracket 1, a positive pressure dust isolation component 2 installed on the upper part of the sensing equipment mounting bracket 1, a dynamic protection device 3 hinged to the sensing equipment mounting bracket 1, a pulse airflow backflushing dust removal component 4 for removing dust from the air inlet filter screen of the positive pressure dust isolation component 2, and a control unit 5 for controlling the operation of the entire device.

[0044] like Figure 3 As shown, the sensing device mounting bracket 1 includes a sensing device mounting bracket body 11, a dust-blocking buffer brush 12 installed around the opening of the sensing device mounting bracket body 11, and a position sensor 13 installed on the side of the sensing device mounting bracket body 11. The sensing device mounting bracket body 11 is fixed to an external vehicle and has an elongated air inlet 111. Hinge holes 112 are opened on both sides of the sensing device mounting bracket body 11, and a mounting hole 113 is opened on one side of the sensing device mounting bracket body 11. The position sensor 13 is installed in the mounting hole 113 by a bolt mechanism.

[0045] like Figure 4As shown, the positive pressure dust isolation component 2 is a cross-flow fan, including a positive pressure dust isolation component control switch 21, an air inlet 22 with a filter screen, a long strip-shaped air outlet 23, a cross-flow fan body 24, an air outlet sealing strip 25, a motor 26, and a differential pressure sensor 27.

[0046] The cross-flow fan body 24 is fixed to the top of the sensing device mounting bracket body 11. The air inlet 22 with a filter screen is opened on one side of the cross-flow fan body 24. The positive pressure dust isolation component control switch 21 is installed on one side of the cross-flow fan body 24. The elongated air outlet 23 is opened at the bottom of the cross-flow fan body 24. The air outlet sealing strip 25 is fixedly connected to the four sides of the inner wall of the elongated air outlet 23. The motor 26 and the differential pressure sensor 27 are both installed on one side of the cross-flow fan body 24. The motor 26 is used to drive the impeller in the cross-flow fan body 24 to rotate, generating a continuous airflow, thereby sending air into the sensing device mounting bracket 1 through the elongated air outlet 23 to form a positive pressure airflow environment and prevent external dust from entering.

[0047] The elongated air outlet 23 of the positive pressure dust isolation component 2 corresponds to the elongated air inlet 111 on the main body 11 of the sensing device mounting bracket 1. The air outlet sealing strip 25 serves to seal and prevent air leakage. The control switch 21 of the positive pressure dust isolation component is controlled by the control unit 5. When the positive pressure dust isolation component 2 is working, airflow is evenly blown into the interior of the main body 11 of the sensing device mounting bracket from the elongated air inlet 111, and then blown out from the opening side of the main body 11 of the sensing device mounting bracket, forming a positive pressure airflow environment to prevent dust from entering the interior of the sensing device mounting bracket 1, and thus to prevent dust from falling on the surface of the sensing device and affecting sensing. The differential pressure sensor 27 is used to detect the pressure difference inside and outside the air inlet 22 with filter to determine the degree of filter blockage.

[0048] like Figure 5 As shown, the dynamic protection device 3 includes a protection assembly 31, a hydraulic cylinder 32, a hydraulic pipeline 33, a solenoid hydraulic valve 34, and a pin 35. The hydraulic power comes from the vehicle's hydraulic system, and the action of the solenoid hydraulic valve 34 is controlled by the control unit 5, which in turn controls the extension or retraction of the hydraulic cylinder 32.

[0049] The hydraulic cylinder 32 is rotatably connected to the external vehicle. The electromagnetic hydraulic valve 34 is connected to both ends of the cylinder body of the hydraulic cylinder 32 through two hydraulic pipes 33 respectively. The hydraulic pressure at both ends of the cylinder body of the hydraulic cylinder 32 is adjusted to control the extension and retraction of the hydraulic cylinder 32.

[0050] The protective assembly 31 includes a protective hinge hole 311, an arc-shaped protective plate 312, and a push rod 313;

[0051] The extension end of the hydraulic cylinder 32 is rotatably connected to the push rod 313. Both ends of the push rod 313 are fixedly connected to the protective assembly 31. The protective assembly 31 adopts a swing arm design. The two protective assemblies 31 are symmetrically designed. The protective assembly 31 has a protective hinge hole 311. One end of the pin 35 is fixed at the protective hinge hole 311, and the other end is hinged to the hinge hole 112, so that the protective assembly 31 is hinged to the hinge hole 112 through the pin 35. The end of the protective assembly 31 away from the hydraulic cylinder 32 is fixedly connected to the arc-shaped protective plate 312.

[0052] The dynamic protective device 3 is hinged to the sensing device mounting bracket 1 through the protective component hinge hole 311. The protective assembly 31 rotates around the protective component hinge hole 311 under the pushing or pulling force of the hydraulic cylinder 32. When the hydraulic cylinder 32 extends, it pushes the protective assembly 31 to rotate, and the arc-shaped protective plate 312 can block the opening side of the sensing device mounting bracket 1, forming a closed protective cavity together with the sensing device mounting bracket 1 to protect the sensing device installed inside the sensing device mounting bracket 1. There is a dust-blocking buffer brush 12 between the arc-shaped protective plate 312 and the sensing device mounting bracket 1 to buffer and block the gap, preventing dust from entering. When the hydraulic cylinder 32 retracts, it will pull the protective assembly 31 back, and the arc-shaped protective plate 312 will no longer block the opening side of the sensing device mounting bracket 1, and the sensing device installed inside the sensing device mounting bracket 1 can work normally.

[0053] like Figure 6 As shown, the pulse airflow backflushing dust removal component 4 includes an air compressor 41, an air tank 42, an electromagnetic pneumatic valve 43, and a nozzle 44. The air compressor 41, air tank 42, electromagnetic pneumatic valve 43, and nozzle 44 are connected in sequence by pipes and are all fixed on the external vehicle. One end of the nozzle 44 extends into the air compressor 41 and is located inside the filter screen on the air inlet 22 with the filter screen.

[0054] The air compressor 41 and air tank 42 can reuse the vehicle's compressor and air tank. The electromagnetic pneumatic valve 43 opens or closes under the control of the control unit 5. When the electromagnetic pneumatic valve 43 opens, high-pressure gas in the air tank 42 is ejected through the nozzle 44. The outlet of the nozzle 44 back-blown air onto the filter screen on the air inlet 22 of the positive pressure dust isolation component 2, removing the dust accumulated on the filter screen. Multiple nozzles 44 can be installed depending on the length of the air inlet 22 with the filter screen. By intermittently controlling the opening and closing of the electromagnetic pneumatic valve 43, a pulsed airflow is formed, repeatedly back-blowing the filter screen for more effective dust removal.

[0055] like Figure 7As shown, position sensor 13, differential pressure sensor 27, positive pressure dust isolation component control switch 21, electromagnetic hydraulic valve 34, and electromagnetic pneumatic valve 43 are all electrically connected to control unit 5. Control unit 5 is installed on an external vehicle and is used for the action control of the positive pressure dust isolation backflushing dust removal protection device of the present invention. It can be used as a separate controller or as a module in an unmanned driving controller; essentially, it is a set of control logic. Input is obtained from the unmanned driving system, and signals from position sensor 13 and differential pressure sensor 27 are obtained. According to the vehicle's operating state and position, and following the control logic, the actions of positive pressure dust isolation component control switch 21, electromagnetic hydraulic valve 34, and electromagnetic pneumatic valve 43 are controlled. There are three modes: protection, start-up, and normal operation. The control logic for the three modes is shown in Table 1 below.

[0056] Table 1 Working Mode

[0057]

[0058] Protection Mode: In this mode, the sensing device does not need to operate. To prevent dust accumulation, the electromagnetic hydraulic valve 34 is in the extended position, the hydraulic cylinder 32 extends, and pushes the protective assembly 31 until the opening side of the sensing device mounting bracket 1 is completely blocked. The gap in the middle is filled and blocked by the dust-blocking buffer brush 12, thereby isolating external dust. The positive pressure dust isolation component control switch 21 is closed, the positive pressure dust isolation component 2 stops working, the electromagnetic pneumatic valve 43 is in the closed state, and the pulse airflow backflushing dust removal component 4 does not work.

[0059] Start-up mode: When the autonomous driving system is working, the sensing equipment needs to operate. The system switches from protection mode to start-up mode. At this time, the electromagnetic hydraulic valve 34 is in the retracted position, and the hydraulic cylinder 32 retracts its push rod, pulling back the protective assembly 31, thus ensuring the sensing equipment's field of vision is no longer obstructed by the arc-shaped protective plate 312. Simultaneously, the positive pressure dust isolation component control switch 21 is turned on, and the positive pressure dust isolation component 2 begins to operate. Air is supplied through the elongated air inlet 111 on the sensing equipment mounting bracket body 11, dispersing dust around the sensing equipment and preventing dust from settling. The electromagnetic pneumatic valve 43 opens and closes intermittently, such as... Figure 8 As shown, the electromagnetic pneumatic valve 43 is open for a duration of t1 and then closed for a duration of t2, repeating this process for n cycles. Airflow is intermittently ejected from the nozzle 44 of the pulse airflow backflushing dust removal component 4, backflushing the filter screen on the air inlet 22 with the filter screen, removing accumulated dust, and creating a clean working environment for the sensing device.

[0060] Normal working mode: The unmanned driving system is working normally and the start-up mode ends. At this time, the arc-shaped protective plate 312 of the dynamic protective device 3 is in the retracted state, the sensing equipment is working normally, the positive pressure dust isolation component 2 is working, and the air is continuously supplied, while the pulse airflow back-blowing dust removal component 4 is not working.

[0061] To further explain the operation process of unmanned transport vehicles, their operational states can be divided into normal operation and shutdown operation. Normal operation mainly involves round-trip transportation between the loading and unloading points, which can be either unmanned or manually driven (takeover). Shutdown operation includes returning to the depot for parking, charging, refueling, or maintenance. The control modes used in different operational states are shown in Table 2 below.

[0062] Table 2. Correspondence between Tasks and Modes

[0063]

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A positive pressure dust isolation back blowing dust removal protection device for a vehicle-mounted sensing device, comprising a sensing device mounting bracket (1) and a positive pressure dust isolation component (2), characterized in that, The sensing device mounting bracket (1) comprises a sensing device mounting bracket body (11); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); 2. The positive pressure dust isolation and back flushing dust removal protection device for vehicle-mounted sensing equipment according to claim 1, characterized in that, The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32), a protection assembly (31), an arc-shaped protection plate (312) and a push rod (313); The sensing device mounting bracket (1) is hingedly connected with a dynamic protection device (3), and the dynamic protection device (3) comprises a hydraulic cylinder (32 The both sides of the sensing device mounting bracket body (11) are provided with hinge holes (112), and one side of the sensing device mounting bracket body (11) is provided with a mounting hole (113) for mounting a position sensor (13).

3. The positive pressure dust-proof back-flushing dust removal protection device for a vehicle-mounted sensing device according to claim 2, characterized in that, The protection assembly (31) is provided with a protection piece hinge hole (311), and one end of a pin shaft (35) is fixed to the protection piece hinge hole (311), and the other end is hinged to the hinge hole (112), so as to realize the hinge connection of the protection assembly (31) and the sensing device mounting bracket (1).

4. The positive pressure dust-proof back-flushing dust removal protection device for a vehicle-mounted sensing device according to claim 2, characterized in that, The hydraulic cylinder (32) is rotationally connected to an external vehicle, and the dynamic protection device (3) further comprises an electromagnetic hydraulic valve (34), which is connected to both ends of the cylinder body part of the hydraulic cylinder (32) through two hydraulic pipelines (33) to adjust the hydraulic pressure at both ends of the cylinder body part of the hydraulic cylinder (32), thereby realizing the control of the extension and retraction of the hydraulic cylinder (32).

5. The positive pressure dust-proof back-flushing dust removal protection device for a vehicle-mounted sensing device according to claim 4, characterized in that, The electromagnetic pneumatic valve (43) is alternately opened and closed to form a pulse air flow for repeatedly blowing back the filter screen to remove dust on the filter screen.

6. The positive pressure dust-proof back-flushing dust removal protection device for a vehicle-mounted sensing device according to claim 5, characterized in that, The protection device further comprises a control unit (5) for action control of the positive pressure dust isolation and back blowing dust removal protection device of the application, and the position sensor (13), the differential pressure sensor (27), the positive pressure dust isolation component control switch (21), the electromagnetic hydraulic valve (34) and the electromagnetic pneumatic valve (43) are electrically connected with the control unit (5).

7. The control method of the positive pressure dust separation and blow-off dust removal protection device for the vehicle-mounted sensing device according to claim 6, characterized in that, The method comprises the following steps: S1, obtaining vehicle operation state information, including stopping operation, normal operation, loading point or unloading point state; S2, according to the operation state information, controlling the extension or retraction of the dynamic protection device (3), controlling the start and stop of the positive pressure dust isolation component (2), and controlling the pulse back blowing action of the pulse air flow back blowing dust removal component (4); S3, when the vehicle is in the state of stopping operation, loading or unloading, entering the protection mode: controlling the electromagnetic hydraulic valve (34) to make the hydraulic cylinder (32) extend, driving the protection assembly (31) to shield the opening side of the sensing device mounting bracket (1), and simultaneously closing the positive pressure dust isolation component (2) and the pulse air flow back blowing dust removal component (4); S4, when the vehicle starts or switches from the protection mode to the working state, entering the starting mode: controlling the electromagnetic hydraulic valve (34) to make the hydraulic cylinder (32) retract, opening the positive pressure dust isolation component (2), and controlling the electromagnetic pneumatic valve (43) to intermittently open in pulse mode to back blow and remove dust on the filter screen; S5, when the vehicle is in the normal driving state, entering the normal working mode: keeping the dynamic protection device (3) retracted, continuously operating the positive pressure dust isolation component (2), and closing the pulse air flow back blowing dust removal component (4).

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