Rainfall simulation device for testing automobile combined driving assistance system

Abstract

The invention discloses a rainfall simulation device for testing an automobile combined driving assistance system, which comprises a test square and at least one rainfall module device, an annular point distribution substrate is fixed on the test square, and each rainfall module device is mounted on the annular point distribution substrate; each rainfall module device comprises a lifting mechanism, a rainfall mechanism and an adjusting mechanism, and the rainfall mechanism is mounted on the lifting mechanism and used for watering to simulate a rainfall environment; the lifting mechanism is installed on the annular point distribution base plate and used for driving the rainfall mechanism to ascend and descend. The adjusting mechanism is mounted on the rainfall mechanism and is used for adjusting the water flow of the rainfall mechanism so as to adjust the water sprinkling amount, so that different rainfall environments are simulated; through the multiple rainfall module devices, water can be controllably sprinkled in the area of the annular point distribution base plate to simulate a real rainfall natural scene, large-range and high-uniformity rainfall is achieved, the flexibility is high, the modes are diversified, the performance of the system under various rainfall conditions can be comprehensively and accurately evaluated, and the reliability and the confidence coefficient are high.

Description

Technical Field

[0001] This invention relates to the field of automotive performance testing technology, and in particular to a rainfall simulation device for testing automotive combined driving assistance systems. Background Technology

[0002] Advanced Driver Assistance Systems (ADAS) are key technologies for improving vehicle safety and intelligence, and their performance directly affects road traffic safety and the development of intelligent vehicles. However, the performance of ADAS systems varies significantly under different rainfall conditions. Specifically, rainfall can interfere with the sensors in ADAS systems' perception of the surrounding environment, affecting the accuracy and reliability of functions such as adaptive cruise control, automatic emergency braking, and lane keeping assist. To ensure that ADAS systems can operate stably and safely under various complex weather conditions, comprehensive and rigorous testing and verification are essential.

[0003] Currently, testing in real-world natural environments is the primary means of verifying the performance of automotive ADAS systems. However, natural rainfall conditions are difficult to control and are uncertain, failing to meet the precise requirements of automotive ADAS system testing for specific rainfall environments. Furthermore, existing rainfall simulation systems typically conduct rainfall simulation tests on real straight roads, resulting in a relatively simple test scenario. This prevents the addition of unexpected road conditions during testing, such as simulating complex traffic situations involving pedestrians, bicycles, and two-wheeled electric vehicles crossing the road, thus hindering a comprehensive evaluation of the performance of automotive ADAS systems in handling such emergencies. Consequently, test results deviate significantly from actual road scenarios. In addition, existing rainfall simulation systems have significant deficiencies in rainfall uniformity, with substantial differences in rainfall intensity and distribution across different areas. This affects the accuracy and consistency of test data, failing to meet the stringent high-confidence requirements for automotive ADAS system verification. Summary of the Invention

[0004] The purpose of this invention is to provide a rainfall simulation device for testing automotive combined driving assistance systems, in order to solve the problems in the prior art, such as the difficulty in controlling and uncertainty of natural rainfall conditions, which cannot meet the requirements for accurate testing; the limited test scenarios of existing rainfall simulation systems, which cannot simulate sudden road conditions and thus lead to large deviations in test results; and the insufficient uniformity of rainfall, which affects the accuracy and consistency of test data and cannot meet the requirements for high confidence.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A rainfall simulation device for testing a combined driver assistance system for automobiles includes:

[0007] A test square and at least one rain module device, wherein an annular dot substrate is fixed on the test square and each rain module device is mounted on the annular dot substrate.

[0008] Each of the aforementioned rain module devices includes a lifting mechanism, a rain-spraying mechanism, and an adjustment mechanism. The rain-spraying mechanism is installed on the lifting mechanism and is used to spray water to simulate a rainy environment. The lifting mechanism is installed on the annular dotted base plate and is used to drive the rain-spraying mechanism to rise and fall. The adjustment mechanism is installed on the rain-spraying mechanism and is used to adjust the water flow rate of the rain-spraying mechanism to adjust the amount of water sprayed, thereby simulating different rainy environments.

[0009] Based on the aforementioned technical means, by arranging multiple rain module devices on a ring-shaped substrate, each rain module device can controllably spray water within the area of ​​the ring-shaped substrate to simulate real natural rainfall scenarios, thereby achieving large-scale and highly uniform rainfall to meet the performance testing requirements of automotive ADAS. Specifically, the lifting mechanism drives the rain mechanism to rise and fall, flexibly adjusting the rainfall height of each rain mechanism. Combined with the precise control of the water flow of the rain mechanism by the adjustment mechanism, it can simulate various rainfall environments with different amounts, intensities, and ranges. This overcomes the limitations of traditional rainfall simulation scenarios that are singular and cannot be flexibly adjusted. Moreover, within the controllable range of the ring-shaped substrate, it can cover rainfall requirements in any direction, thus facilitating the addition of simulations of complex traffic conditions such as pedestrians, bicycles, and two-wheeled electric vehicles crossing the road. It solves the difficulty of the rainfall range not being able to cover laterally moving targets on conventional straight roads, reduces the rainfall intensity gradient error within the test area, and provides a richer and more realistic test environment for automotive combined driving assistance systems. This helps to comprehensively and accurately evaluate the system's performance under various rainfall conditions, improve the reliability and confidence of test results, and thus promote the further development and improvement of automotive driving assistance system technology.

[0010] Furthermore, the lifting mechanism includes a fixed base, a mounting frame, a threaded rod, a guide rod, a first driving device, and a lifting block. The fixed base is mounted on an annular dotted base plate, the mounting frame is fixed on the fixed base, the threaded rod and the guide rod are arranged in parallel, the threaded rod is rotatably mounted on the mounting frame, the guide rod is fixed on the mounting frame, the lifting block is slidably mounted on the guide rod and threadedly connected to the threaded rod, the first driving device is mounted on the mounting frame and connected to one end of the threaded rod, used to drive the threaded rod to rotate, thereby driving the lifting block to rise and fall along the axial direction of the guide rod, and the rain mechanism is mounted on the lifting block.

[0011] According to the above technical means, the fixed seat is detachably installed on the annular layout base plate by bolts. The mounting frame provides the mounting foundation for each component. With the cooperation of the parallel threaded rod and guide rod, when the first driving device drives the threaded rod to rotate, the lifting block converts the rotation into linear movement under the guidance of the guide rod, so as to smoothly and accurately lift and lower along the axial direction of the guide rod, thereby driving the rainfall mechanism to lift and lower, realizing height adjustment to meet the rainfall simulation needs at different heights. The structure is simple, stable, easy to adjust, and highly flexible.

[0012] Furthermore, the rainfall mechanism includes an inlet pipe, a connecting pipe, and an arc-shaped pipe. The inlet pipe is rotatably mounted on the lifting block. One end of the inlet pipe is connected to one end of the connecting pipe, and the other end is used to connect to an external water source. The other end of the connecting pipe is connected to one end of the arc-shaped pipe, and a spray nozzle is installed on the arc-shaped pipe.

[0013] Based on the aforementioned technical means, by rotating the water inlet pipe onto the lifting block, the spray angle of the water nozzle can be flexibly adjusted to simulate rainfall in different directions, thus adapting to different scenario requirements. One end of the water inlet pipe is connected to an external water source, and the other end is connected to the arc-shaped pipe through a connecting pipe, ensuring the smooth introduction of water flow. Furthermore, based on the arc-shaped structure of the arc-shaped pipe, the water flow can be sprayed out with a specific arc and range, simulating an effect closer to natural rainfall. The overall structure is simple and practical, effectively improving the diversity and realism of rainfall simulation.

[0014] Furthermore, the number of water nozzles is two or more, and each water nozzle is evenly distributed along the length direction of the arc-shaped tube.

[0015] Based on the aforementioned technical means, the rainfall is more evenly distributed through multiple uniformly distributed nozzles, simulating an effect closer to natural rainfall.

[0016] Furthermore, the rainfall mechanism also includes a second driving device, a driving gear, and a driven gear. The second driving device is mounted on the lifting block, the driving gear is drivingly connected to the second driving device, and the driven gear is coaxially mounted on the water inlet pipe and meshes with the driving gear.

[0017] Based on the above-mentioned technical means, the second drive device is installed on the lifting block to provide a power source. Through the meshing of the drive gear and the driven gear installed on the water inlet pipe, the water inlet pipe can be driven to rotate smoothly and accurately. This allows for flexible adjustment of the angle of the entire rainfall mechanism, simulating rainfall effects in different directions and angles. This greatly enriches the scenarios and functions of rainfall simulation, improves the practicality and adaptability of the device, and makes it highly flexible and easy to adjust.

[0018] Furthermore, the adjustment mechanism includes a connecting plate installed between the water inlet pipe and the connecting pipe. A through groove is formed on the connecting plate to connect the water inlet pipe and the connecting pipe. At least one fan blade is rotatably connected to the connecting plate. Each fan blade is evenly distributed along the circumference of the through groove. Each fan blade is configured to rotate on the connecting plate to adjust the size of the through groove, thereby adjusting the water spray volume of the spray nozzle.

[0019] Based on the aforementioned technical means, a connecting plate is installed between the inlet pipe and the connecting pipe, and the water passage between the inlet pipe and the connecting pipe is connected by the through groove on it. This facilitates the control of water entering the connecting pipe from the inlet pipe. The structure is simple and the connection is stable. Specifically, in practical applications, the evenly distributed fan blades can rotate flexibly on the connecting plate to adjust the size of the through groove, thereby precisely controlling the amount of water entering the connecting pipe. Ultimately, this achieves the adjustment of the water spray volume from the nozzle, which can meet the diverse needs for rainfall in different scenarios and enhances the practicality and controllability of the device.

[0020] Furthermore, the adjustment mechanism also includes a gear ring, which is rotatably mounted between the water inlet pipe and the connecting pipe and is coaxially arranged with the through groove. At least one limiting groove is formed on the gear ring along its circumference, and the limiting grooves are evenly distributed along the circumference of the gear ring. At least one connecting rod is fixed on the water inlet pipe, and the end of each connecting rod away from the water inlet pipe slides through the corresponding limiting groove and is fixed to one end of the connecting pipe. Each fan blade is rotatably connected to a connecting strip, and the end of each connecting strip away from the fan blade is rotatably mounted on the gear ring. The gear ring is configured to rotate along its circumference to drive the fan blade to rotate through the connecting strips.

[0021] Based on the aforementioned technical means, a gear ring is rotatably installed between the inlet pipe and the connecting pipe, and is coaxial with the through groove. The evenly distributed limiting grooves on the gear ring cooperate with the connecting rod on the inlet pipe, providing stable support and guidance for the gear ring. Each fan blade is connected to the gear ring through a connecting strip. Specifically, when the gear ring rotates circumferentially, the connecting strip drives the fan blades to rotate synchronously, so that each fan blade can gather or disperse on the through groove, thereby accurately and efficiently controlling the area of ​​the through groove, and thus realizing flexible control of the water spray volume of the nozzle. This allows for the adjustment of the rainfall volume, simulating rainfall environments such as light rain, moderate rain, heavy rain, rainstorm, torrential rain, and extremely heavy rain, greatly improving the precision and controllability of rainfall simulation.

[0022] Furthermore, the adjustment mechanism also includes a third driving device and a transmission gear. The third driving device is installed on the water inlet pipe, and the transmission gear is driven by the third driving device and meshes with a gear ring.

[0023] Based on the above technical means, the power source is provided by the third drive device. Through the precise meshing of the transmission gear and the gear ring, the power can be smoothly and accurately transmitted to the gear ring, enabling it to rotate circumferentially. Then, the fan blade is rotated flexibly through the connecting strip to adjust the size of the through groove, realizing the automatic and precise adjustment of the water spray volume of the spray nozzle. This greatly improves the ease of operation and adjustment accuracy of the device. The structure is simple and easy to adjust.

[0024] Furthermore, annular sealing grooves are formed on the two side walls of the gear ring near the water inlet pipe and the connecting pipe, and sealing rings are fixed at one end of the water inlet pipe and the connecting pipe near the gear ring, with the two sealing rings rotatably installed in the corresponding annular sealing grooves.

[0025] Based on the above technical means, by setting annular sealing grooves on both sides of the gear ring and installing sealing rings at the corresponding ends of the inlet pipe and connecting pipe, the sealing rings are rotatably installed in the annular sealing grooves, forming a reliable dynamic sealing structure. This prevents water leakage at the connection between the gear ring and the inlet pipe and connecting pipe, ensuring the sealing performance of the water system, avoiding water waste and equipment failures that may be caused by leakage, while not affecting the normal rotation of the gear ring, thus improving the stability and reliability of the entire regulating mechanism.

[0026] Furthermore, a control box and a rainfall monitoring module are also installed on the test square. The rainfall monitoring module is connected to the rainfall mechanism to monitor the amount of water sprayed by the rainfall mechanism. The control box is connected to the adjustment mechanism and the rainfall monitoring module respectively. The control box is configured to control the adjustment mechanism to adjust the water flow of the rainfall mechanism according to the amount of water sprayed monitored by the rainfall monitoring module.

[0027] Based on the aforementioned technical means, by setting up a control box and a rainfall monitoring module on the test square, the rainfall monitoring module can accurately monitor the amount of water sprayed by communicating with the rainfall mechanism. The control box is connected to both the adjustment mechanism and the rainfall monitoring module, and can automatically and accurately control the adjustment mechanism to adjust the water flow of the rainfall mechanism based on the monitored water spray data. This achieves real-time monitoring and intelligent control of rainfall, greatly improving the automation and accuracy of rainfall simulation testing, and making the test results more reliable and scientific.

[0028] The beneficial effects achieved by this invention are as follows:

[0029] 1. This invention arranges multiple rain module devices on a ring-shaped dotted substrate. Each rain module device can controllably spray water within the area of ​​the ring-shaped dotted substrate to simulate real natural rainfall scenarios, thereby achieving large-scale and highly uniform rainfall, meeting the performance testing requirements of automotive ADAS. Moreover, within the controllable range of the ring-shaped dotted substrate, it can cover rainfall requirements in any direction, thus facilitating the addition of simulations of complex traffic conditions such as pedestrians, bicycles, and two-wheeled electric vehicles crossing the road. It solves the difficulty that the rainfall range on conventional straight roads cannot cover laterally moving targets, reduces the rainfall intensity gradient error in the test area, and provides a richer and more realistic test environment for automotive combined driving assistance systems.

[0030] 2. This invention uses a lifting mechanism to drive the rain-generating mechanism to rise and fall, allowing for flexible adjustment of the rainfall height of each rain-generating mechanism. Combined with the precise control of water flow in the rain-generating mechanism by the adjustment mechanism, it can simulate various rainfall environments with different amounts, intensities, and ranges. This breaks through the limitations of traditional rainfall simulation scenarios, which are limited to a single scenario and cannot be flexibly adjusted. It helps to comprehensively and accurately evaluate the system's performance under various rainfall conditions, improves the reliability and confidence of test results, and thus promotes the further development and improvement of automotive driver assistance system technology. Attached Figure Description

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

[0032] Figure 2 This is a schematic diagram of the overall structure of the rain module device of the present invention;

[0033] Figure 3 This is a schematic diagram of the overall structure of the rainfall mechanism of the present invention;

[0034] Figure 4 For the present invention Figure 3 Enlarged view of A in the middle;

[0035] Figure 5 This is a schematic diagram of the adjustment mechanism of the present invention;

[0036] Figure 6 This is an exploded view of the adjusting mechanism of the present invention;

[0037] Figure 7 This is a schematic diagram of the rainfall area when the present invention is applied.

[0038] The components are as follows: 1-Testing plaza; 2-Annular layout substrate; 3-Lifting mechanism; 301-Fixed base; 302-Mounting frame; 303-Threaded rod; 304-Guide rod; 305-First driving device; 306-Lifting block; 4-Rainfall mechanism; 401-Water inlet pipe; 4011-Connecting rod; 402-Connecting pipe; 403-Arc-shaped pipe; 404-Water nozzle; 405-Second driving device; 406-Drive gear; 407-Driven gear; 5-Adjusting mechanism; 501-Connecting plate; 5011-Through groove; 502-Fan blade; 503-Gear ring; 5031-Limiting groove; 504-Connecting strip; 505-Third driving device; 506-Transmission gear.

[0039] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0042] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0043] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0044] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0045] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0046] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] This embodiment relates to a rainfall simulation device for testing a combined driving assistance system for automobiles, such as... Figures 1-4 As shown, it includes: a test plaza 1 and at least one rain module device. A ring-shaped dotted substrate 2 is fixed on the test plaza 1, and each rain module device is installed on the ring-shaped dotted substrate 2. Each rain module device includes a lifting mechanism 3, a rain mechanism 4, and an adjustment mechanism 5. The rain mechanism 4 is installed on the lifting mechanism 3 and is used to spray water to simulate a rain environment. The lifting mechanism 3 is installed on the ring-shaped dotted substrate 2 and is used to drive the rain mechanism 4 to rise and fall. The adjustment mechanism 5 is installed on the rain mechanism 4 and is used to adjust the water flow rate of the rain mechanism 4 to adjust the amount of water sprayed, thereby simulating different rain environments.

[0048] This embodiment arranges multiple rain module devices on a ring-shaped substrate 2, with adjustable spacing between each rain module device. This allows for the spraying of water within the area of ​​the ring-shaped substrate 2 to simulate different real-world rainfall scenarios, achieving large-scale, highly uniform, and controllable rainfall to meet the performance testing requirements of automotive ADAS systems. Specifically, in practical applications, each lifting mechanism 3 drives the corresponding rain mechanism 4 to rise and fall, flexibly adjusting the rainfall height of each rain mechanism 4 according to actual needs. This allows for varying or identical heights of each rain mechanism, simulating different rainfall environments. Combined with the precise control of water flow by the adjusting mechanism 5, this simulates... The system can simulate various rainfall environments with different amounts, intensities, and ranges, offering ease of control, high flexibility, multiple modes, and strong practicality. It can cover rainfall requirements in any direction within the area of ​​the annular base plate 2, making it easy to add simulations of complex traffic conditions such as pedestrians, bicycles, and two-wheeled electric vehicles crossing the road. This solves the problem that the rainfall range on conventional straight roads cannot cover laterally moving targets, providing a richer and more realistic test environment for automotive combined driving assistance systems. This helps to comprehensively and accurately evaluate the system's performance under various rainfall conditions, improve the reliability and confidence of test results, and thus promote the further development and improvement of automotive driving assistance system technology.

[0049] like Figure 2 As shown, in this embodiment, the lifting mechanism 3 includes a fixed base 301, a mounting frame 302, a threaded rod 303, a guide rod 304, a first driving device 305, and a lifting block 306. The fixed base 301 is mounted on the annular dotted base plate 2, and the mounting frame 302 is fixed on the fixed base 301. The threaded rod 303 and the guide rod 304 are arranged in parallel. The threaded rod 303 is rotatably mounted on the mounting frame 302, and the guide rod 304 is fixed on the mounting frame 302. The lifting block 306 is slidably mounted on the guide rod 304 and threadedly connected to the threaded rod 303. The first driving device 305 is mounted on the mounting frame 302 and connected to one end of the threaded rod 303, and is used to drive the threaded rod 303 to rotate, so as to drive the lifting block 306 to rise and fall along the axial direction of the guide rod 304. The rain mechanism 4 is mounted on the lifting block 306.

[0050] In this embodiment, the fixed base 301 is detachably mounted on the annular dotted base plate 2 by bolts, which facilitates the adjustment of the spacing between each rainfall mechanism 4 to simulate the rainfall environment according to actual test requirements. Specifically, in actual application, the first driving device 305 drives the threaded rod 303 to rotate, and the lifting block 306 converts the rotation into linear movement under the guidance of the guide rod 304, so as to drive the rainfall mechanism 4 to rise and fall smoothly and accurately along the axial direction of the guide rod 304, thereby realizing height adjustment to meet the rainfall simulation requirements at different heights. The structure is simple, stable, easy to adjust, and highly flexible. The first driving device 305 can be a stepper motor.

[0051] like Figure 3 and Figure 4 As shown, in this embodiment, the rainfall mechanism 4 includes a water inlet pipe 401, a connecting pipe 402, and an arc-shaped pipe 403. The water inlet pipe 401 is rotatably mounted on the lifting block 306. One end of the water inlet pipe 401 is connected to one end of the connecting pipe 402, and the other end is used to connect to an external water source. The other end of the connecting pipe 402 is connected to one end of the arc-shaped pipe 403. A water nozzle 404 is installed on the arc-shaped pipe 403.

[0052] In this embodiment, the water inlet pipe 401 is rotatably mounted on the lifting block 306, facilitating flexible adjustment of the spray angle of the spray nozzle 404 to simulate rainfall in different directions, thus adapting to different scenario requirements. One end of the water inlet pipe 401 is connected to an external water source, and the other end is connected to the arc-shaped pipe 403 via a connecting pipe 402, ensuring smooth water flow. Furthermore, based on the arc-shaped structure of the arc-shaped pipe 403, the water flow can be sprayed out with a specific arc and range, specifically, as shown below. Figure 7 As shown, in practical applications, multiple arc-shaped tubes 403 work together, with the end of each arc-shaped tube 403 away from the water inlet pipe 401 located on the central axis of the annular dotted substrate 2. During rainfall operation, as the water inlet pipe 401 rotates, the trajectories of each arc-shaped tube 403 form a "petal"-shaped area, simulating an effect closer to natural rainfall. The overall structure is simple and practical, effectively improving the diversity and realism of rainfall simulation.

[0053] Furthermore, as a preferred embodiment of this invention, the number of water nozzles 404 is two or more, and each water nozzle 404 is evenly distributed along the length direction of the arc-shaped tube 403; through multiple evenly distributed water nozzles 404, the rainfall is more uniform, simulating an effect closer to natural rainfall.

[0054] like Figure 3 As shown, in this embodiment, the rainfall mechanism 4 also includes a second driving device 405, a driving gear 406 and a driven gear 407. The second driving device 405 is mounted on the lifting block 306, the driving gear 406 is drivenly connected to the second driving device 405, and the driven gear 407 is coaxially mounted on the water inlet pipe 401 and meshes with the driving gear 406.

[0055] In this embodiment, a second drive device 405 is installed on the lifting block 306 to provide a power source. The drive gear 406 meshes with the driven gear 407 coaxially installed on the water inlet pipe 401 to drive the water inlet pipe 401 to rotate smoothly and accurately. This allows for flexible adjustment of the angle of the entire rainfall mechanism, simulating rainfall effects from different directions and angles. This greatly enriches the scenarios and functions of rainfall simulation, improves the practicality and adaptability of the device, and makes it highly flexible and easy to adjust. The second drive device 405 can be a motor.

[0056] like Figure 5 As shown, in this embodiment, the adjustment mechanism 5 includes a connecting plate 501, which is installed between the water inlet pipe 401 and the connecting pipe 402. A through groove 5011 is formed on the connecting plate 501, which is used to connect the water inlet pipe 401 and the connecting pipe 402. At least one fan blade 502 is rotatably connected to the connecting plate 501. Each fan blade 502 is evenly distributed along the circumference of the through groove 5011. Each fan blade 502 is configured to be able to rotate on the connecting plate 501 to adjust the size of the through groove 5011, thereby adjusting the water spray volume of the spray nozzle 404.

[0057] This embodiment uses a connecting plate 501 between the inlet pipe 401 and the connecting pipe 402, and utilizes the through groove 5011 on it to connect the water passages between the inlet pipe 401 and the connecting pipe 402. This facilitates the control of water entering the connecting pipe 402 from the inlet pipe 401. The structure is simple and the connection is stable. Specifically, in practical applications, the evenly distributed fan blades 502 can rotate flexibly on the connecting plate 501 to adjust the size of the through groove 5011, thereby precisely controlling the amount of water entering the connecting pipe 402. Ultimately, this achieves the adjustment of the water spray volume of the spray nozzle 404, which can meet the diverse needs of rainfall in different scenarios and enhance the practicality and controllability of the device.

[0058] like Figure 5 and Figure 6 As shown, in this embodiment, the adjusting mechanism 5 further includes a gear ring 503, which is rotatably installed between the water inlet pipe 401 and the connecting pipe 402 and is coaxially arranged with the through groove 5011. At least one limiting groove 5031 is formed on the gear ring 503 along its circumference, and each limiting groove 5031 is evenly distributed along the circumference of the gear ring 503. At least one connecting rod 4011 is fixed on the water inlet pipe 401, and the end of each connecting rod 4011 away from the water inlet pipe 401 slides through the corresponding limiting groove 5031 and is fixed to one end of the connecting pipe 402. Each fan blade 502 is rotatably connected to a connecting strip 504, and the end of each connecting strip 504 away from the fan blade 502 is rotatably installed on the gear ring 503. The gear ring 503 is configured to be able to rotate along its circumference so as to drive the fan blade 502 to rotate through each connecting strip 504.

[0059] In this embodiment, a gear ring 503 is rotatably installed between the water inlet pipe 401 and the connecting pipe 402 and is coaxial with the through groove 5011. The evenly distributed limiting grooves 5031 on the gear ring 503 cooperate with the connecting rod 4011 on the water inlet pipe 401, providing stable support and guidance for the gear ring 503. Each fan blade 502 is connected to the gear ring 503 through a connecting strip 504. Specifically, when the gear ring 503 rotates circumferentially, the connecting strip 504 drives the fan blades 502 to rotate synchronously, so that each fan blade 502 can gather or disperse on the through groove 5011, so as to accurately and efficiently control the area of ​​the through groove 5011, thereby realizing flexible control of the water spray volume of the spray nozzle 404, realizing the adjustment of the amount of rainfall, simulating rainfall environments such as light rain, moderate rain, heavy rain, rainstorm, heavy rainstorm, and extremely heavy rainstorm, greatly improving the precision and controllability of rainfall simulation.

[0060] like Figure 5 and Figure 6 As shown, in this embodiment, the adjustment mechanism 5 further includes a third driving device 505 and a transmission gear 506. The third driving device 505 is installed on the water inlet pipe 401, and the transmission gear 506 is drivenly connected to the third driving device 505. The transmission gear 506 meshes with the gear ring 503.

[0061] In this embodiment, a third drive device 505 provides a power source. Through the precise meshing of the transmission gear 506 and the gear ring 503, the power can be smoothly and accurately transmitted to the gear ring 503, enabling it to rotate circumferentially. This, in turn, allows the connecting strip 504 to flexibly drive the fan blade 502 to rotate and adjust the size of the through groove 5011, thereby achieving automated and precise adjustment of the water spray volume of the spray nozzle 404. This greatly improves the ease of operation and adjustment accuracy of the device, and the structure is simple and easy to adjust. The third drive device 505 can be an electric motor.

[0062] Furthermore, as a preferred embodiment of this invention, annular sealing grooves are formed on the two side walls of the gear ring 503 near the water inlet pipe 401 and the connecting pipe 402, respectively. Sealing rings are fixed to one end of the water inlet pipe 401 and the connecting pipe 402 near the gear ring 503, and the two sealing rings are rotatably installed in the corresponding annular sealing grooves. By setting annular sealing grooves on the two side walls of the gear ring 503 and installing sealing rings at the corresponding ends of the water inlet pipe 401 and the connecting pipe 402, the sealing rings are rotatably installed in the annular sealing grooves, forming a reliable dynamic sealing structure. This prevents water leakage at the connection between the gear ring 503 and the water inlet pipe 401 and the connecting pipe 402, ensuring the sealing performance of the water system, avoiding water waste and equipment failures that may be caused by water leakage, and at the same time not affecting the normal rotation of the gear ring 503, thus improving the stability and reliability of the entire regulating mechanism 5. The annular sealing grooves and sealing rings are not shown in the figures, but their results are well known to those skilled in the art.

[0063] Furthermore, as a preferred embodiment of this example, a control box and a rainfall monitoring module are also installed on the test square 1. The rainfall monitoring module is communicatively connected to the rainfall mechanism 4 and is used to monitor the water spraying volume of the rainfall mechanism 4. The control box is communicatively connected to both the adjustment mechanism 5 and the rainfall monitoring module. The control box is configured to control the adjustment mechanism 5 to adjust the water flow of the rainfall mechanism 4 according to the water spraying volume monitored by the rainfall monitoring module. In this embodiment, by setting a control box and a rainfall monitoring module on the test square 1, the rainfall monitoring module can accurately monitor the water spraying volume of the rainfall mechanism 4 through its communicative connection. The control box, which is communicatively connected to both the adjustment mechanism 5 and the rainfall monitoring module, can automatically and accurately control the adjustment mechanism 5 to adjust the water flow of the rainfall mechanism 4 according to the monitored water spraying volume signal. This achieves real-time monitoring and intelligent control of rainfall, greatly improving the automation and accuracy of rainfall simulation testing, and making the test results more reliable and scientific.

[0064] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A rainfall simulation device for testing a combined driving assistance system for automobiles, characterized in that, include: A test square (1) and at least one rain module device, wherein an annular dot substrate (2) is fixed on the test square (1), and each of the rain module devices is mounted on the annular dot substrate (2); Each of the aforementioned rain module devices includes a lifting mechanism (3), a rain mechanism (4), and an adjustment mechanism (5). The rain mechanism (4) is installed on the lifting mechanism (3) and is used to spray water to simulate a rain environment. The lifting mechanism (3) is installed on the annular dotted base plate (2) and is used to drive the rain mechanism (4) to rise and fall. The adjustment mechanism (5) is installed on the rain mechanism (4) and is used to adjust the water flow of the rain mechanism (4) to adjust the amount of water sprayed, thereby simulating different rain environments.

2. The rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 1, characterized in that, The lifting mechanism (3) includes a fixed base (301), a mounting bracket (302), a threaded rod (303), a guide rod (304), a first driving device (305), and a lifting block (306). The fixed base (301) is mounted on the annular dotted base plate (2), and the mounting bracket (302) is fixed on the fixed base (301). The threaded rod (303) and the guide rod (304) are arranged in parallel, and the threaded rod (303) is rotatably mounted on the mounting bracket (302). The guide rod (304) is fixed on the mounting bracket (302). The lifting block (306) is slidably mounted on the guide rod (304) and threadedly connected to the threaded rod (303). The first driving device (305) is mounted on the mounting bracket (302) and connected to one end of the threaded rod (303) to drive the threaded rod (303) to rotate, thereby driving the lifting block (306) to rise and fall along the axial direction of the guide rod (304). The rain mechanism (4) is mounted on the lifting block (306).

3. The rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 2, characterized in that, The rainfall mechanism (4) includes an inlet pipe (401), a connecting pipe (402), and an arc-shaped pipe (403). The inlet pipe (401) is rotatably mounted on the lifting block (306). One end of the inlet pipe (401) is connected to one end of the connecting pipe (402), and the other end is used to connect to an external water source. The other end of the connecting pipe (402) is connected to one end of the arc-shaped pipe (403). A spray nozzle (404) is installed on the arc-shaped pipe (403).

4. The rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 3, characterized in that, The number of the water nozzles (404) is two or more, and each of the water nozzles (404) is evenly distributed along the length direction of the arc-shaped tube (403).

5. The rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 3, characterized in that, The rainfall mechanism (4) further includes a second drive device (405), a drive gear (406), and a driven gear (407). The second drive device (405) is mounted on the lifting block (306). The drive gear (406) is drivenly connected to the second drive device (405). The driven gear (407) is coaxially mounted on the water inlet pipe (401) and meshes with the drive gear (406).

6. The rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 3, characterized in that, The adjusting mechanism (5) includes a connecting plate (501) installed between the water inlet pipe (401) and the connecting pipe (402). A through groove (5011) is formed on the connecting plate (501) for connecting the water inlet pipe (401) and the connecting pipe (402). At least one fan blade (502) is rotatably connected to the connecting plate (501). Each fan blade (502) is evenly distributed along the circumference of the through groove (5011). Each fan blade (502) is configured to rotate on the connecting plate (501) to adjust the size of the through groove (5011), thereby adjusting the water spray volume of the spray nozzle (404).

7. The rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 6, characterized in that, The adjusting mechanism (5) further includes a gear ring (503), which is rotatably mounted between the water inlet pipe (401) and the connecting pipe (402) and is coaxially arranged with the through groove (5011). At least one limiting groove (5031) is formed on the gear ring (503) along its circumference. Each of the limiting grooves (5031) is evenly distributed along the circumference of the gear ring (503). At least one connecting rod (4011) is fixed on the water inlet pipe (401). (4011) The end away from the water inlet pipe (401) slides through the corresponding limiting groove (5031) and is fixed to one end of the connecting pipe (402); each of the fan blades (502) is rotatably connected to a connecting strip (504), and the end of each connecting strip (504) away from the fan blade (502) is rotatably mounted on a gear ring (503). The gear ring (503) is configured to rotate circumferentially to drive the fan blade (502) to rotate through each connecting strip (504).

8. The rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 7, characterized in that, The adjustment mechanism (5) further includes a third drive device (505) and a transmission gear (506). The third drive device (505) is installed on the water inlet pipe (401). The transmission gear (506) is driven to connect with the third drive device (505). The transmission gear (506) meshes with the gear ring (503).

9. A rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 7, characterized in that, The gear ring (503) has annular sealing grooves formed on both sides of the water inlet pipe (401) and the connecting pipe (402). A sealing ring is fixed at one end of the water inlet pipe (401) and the connecting pipe (402) near the gear ring (503). The two sealing rings are rotatably installed in the corresponding annular sealing grooves.

10. A rainfall simulation device for testing a combined driving assistance system for automobiles according to claim 1, characterized in that, The test square (1) is also equipped with a control box and a rainfall monitoring module. The rainfall monitoring module is connected to the rainfall mechanism (4) for monitoring the amount of water sprayed by the rainfall mechanism (4). The control box is connected to the adjustment mechanism (5) and the rainfall monitoring module respectively. The control box is configured to control the adjustment mechanism (5) to adjust the water flow of the rainfall mechanism (4) according to the amount of water sprayed monitored by the rainfall monitoring module.

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