A direct visual field testing device

Abstract

The application discloses a direct visual field testing device, and relates to the technical field of testing, which comprises a video auxiliary device and a marker device; the video auxiliary device is provided with a height adjusting mechanism, an angle adjusting mechanism and a holder adjusting mechanism, and realizes three-dimensional positioning of a preset eye point and real-time video acquisition; the marker device is provided with a height adjusting rod, a joint bearing and laser auxiliary positioning, and realizes accurate adjustment and stable positioning of the marker in a testing area; the direct visual field testing device is suitable for accurate measurement of a driver's visual field range, can efficiently collect and record testing data, has the advantages of convenient operation, strong adaptability, high precision and the like, and is widely applied to the fields of vehicle design, driving training and safety research and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of testing, and in particular to a direct visual field testing device. Background Art

[0002] With the rapid development of the automotive industry, vehicle driving safety has gradually become a focus of social attention. The driver's field of vision directly affects their ability to perceive the vehicle's surroundings. As an important means of evaluating driver operational safety, visual field testing is widely used in driver training, vehicle design, and safety research.

[0003] Existing visual field testing equipment typically relies on a single measurement method, such as a fixed coordinate pole or a simple camera device. This type of equipment has the following major shortcomings:

[0004] Lack of flexibility: Most devices only support marker settings at fixed heights or fixed angles, making it difficult to adapt to different driving environments or diverse testing needs.

[0005] Insufficient precision: The marker position adjustment of traditional devices is relatively rough, and accurate three-dimensional positioning cannot be achieved, resulting in reduced reliability of test data.

[0006] Low testing efficiency: Existing equipment often requires repeated manual adjustment of marker positions or viewing angles, making the entire testing process time-consuming and complex to operate. Summary of the Invention

[0007] The purpose of the present invention is to provide a direct visual field testing device to achieve high-precision measurement, real-time acquisition and efficient recording of the driver's visual field, thereby improving the accuracy, convenience and applicability of the test.

[0008] The technical solution of the present invention is: providing a direct visual field testing device, the direct visual field testing device comprising: a video auxiliary device and a marker device;

[0009] The video assistance device is installed on the driver's seat of the vehicle, and the posture of the video assistance device is adjusted according to the spatial positions of the preset eye points E1, E2, and E3 required;

[0010] The marker device simulates a reference target within the vehicle's field of view and can be continuously adjusted between different marker height ranges to cover all test heights required in the standard test. The marker device emits a laser downward to indicate the projected position of the marker on the ground.

[0011] The camera of the video assistance device is adjusted to observe the markers and record the vehicle's observable field of view.

[0012] In any of the technical solutions above, further, the video auxiliary device comprises a bottom plate, an angle adjustment support rod, an angle adjustment fixed block, a main body support rod, a height adjustment mechanism, a holder adjustment mechanism, a holder camera, a holder fixed seat and a coordinate confirmation rod;

[0013] The bottom plate is located at the bottom of the video auxiliary device, and fixes and supports the main body structure above, and is installed on the driver seat of the vehicle;

[0014] The angle adjustment support rod is connected to the bottom plate, and the angle adjustment support rod is connected to the main body support rod through the angle adjustment fixed block; one end of the angle adjustment fixed block is connected to the main body support rod through a fixed point, the angle adjustment fixed block can rotate around the fixed point, and the other end of the angle adjustment fixed block has a hollow sliding groove, the sliding groove is slidably connected to the angle adjustment support rod, and the main body support rod is hinged to the bottom plate;

[0015] The height adjustment mechanism is a telescopic structure installed above the main body support rod, and the top end of the height adjustment mechanism can move up and down along the main body support rod;

[0016] The holder adjustment mechanism is fixed at the top of the height adjustment mechanism, the holder fixed seat is installed at the top of the holder adjustment mechanism, the upper surface of the holder fixed seat has three hole positions, which are installation hole positions corresponding to E1, E2 and E3 eye points, wherein E1 is used for observing the left side area of the cab, E2 is used for observing the front side area of the cab, and E3 is used for observing the right side area of the cab;

[0017] The holder camera is installed on any hole position on the upper surface of the holder fixed seat, and the lens position of the holder camera is consistent with the height of the E1, E2 and E3 eye points;

[0018] The coordinate confirmation rod is installed on the installation hole position corresponding to the E2 eye point on the upper surface of the holder fixed seat, the height of the coordinate confirmation rod is consistent with the height of the lens of the holder camera, and the top point of the coordinate confirmation rod coincides with the E2 eye point after installation, thereby providing an accurate reference point.

[0019] In any of the technical solutions above, further, the holder adjustment mechanism comprises a Y-direction sliding plate, an X-direction sliding plate and an angle adjustment structure;

[0020] The Y-direction sliding plate is slidably connected to the top of the height adjustment mechanism through a sliding rail, and a fixed point pulley is arranged at the top of the height adjustment mechanism, so that the structure above can displace in the Y direction, and the Y direction is the left-right direction of the cab; a fixed point pulley is arranged at the top of the Y-direction sliding plate, and the X-direction sliding plate is connected above the Y-direction sliding plate through a sliding rail at the bottom of the X-direction sliding plate, so that the structure above can displace in the X direction, and the X direction is the front-rear direction of the cab;

[0021] The angle adjustment structure is fixed on the top of the X-axis sliding plate. The angle adjustment structure includes a horizontal bearing, a vertical bearing and an operating lever. The shaft core of the horizontal bearing is fixed to the X-axis sliding plate, and the shaft core of the vertical bearing is fixedly connected to the shaft wheel of the horizontal bearing. The operating lever and the gimbal fixed seat are both fixed to the shaft wheel of the vertical bearing. By controlling the operating lever, the gimbal fixed seat can be rotated in all directions.

[0022] In any of the above technical solutions, further, the video assistance device further includes: a laser level;

[0023] The laser level is installed in the mounting hole corresponding to the E2 eye point on the upper surface of the pan / tilt mount. The laser level can project a plane beam; the laser emission port of the laser level can be rotated relative to the mounting surface of the pan / tilt mount.

[0024] In any of the above technical solutions, further, the marker device includes: a base, an adjustment rod fixing seat, a height adjustment rod, a marker carrying mechanism and a marker;

[0025] The base is the supporting structure of the marker device. It consists of a rectangular metal plate with casters. A caster is installed at each corner of the base. These casters can rotate around the mounting axis to move the marker device in various directions. These casters are equipped with a locking function to fix the position of the marker device. The upper surface of the base is designed with a circle of screw holes for fixing the adjustment rod fixing base.

[0026] The adjusting rod fixing seat is installed on the upper surface of the base. The adjusting rod fixing seat is an upright segmented metal cylindrical structure. The bottom of the adjusting rod fixing seat is connected to the screw hole on the upper surface of the base through bolts;

[0027] The height adjustment rod is inserted from above into the adjustment rod fixing seat to complete the connection. The height adjustment rod is a hollow metal cylindrical rod. The marker carrying mechanism slides into the outer ring of the height adjustment rod from above. The outer surface of the rod body is engraved with scale lines; the marker is set on the marker carrying mechanism.

[0028] In any of the above technical solutions, further, the marker carrying mechanism includes: a fixing seat, a guide shaft, a marker fixing plate, an adjustment screw, a marker fixing rod, a joint bearing, a laser mounting seat, a laser emitter, and a laser adjustment seat;

[0029] The fixing seat is sleeved on the outer surface of the height adjustment rod, and the fixing seat clamps the height adjustment rod by tightening a bolt on one side, so that the fixing seat is fixed at a specific position on the height adjustment rod;

[0030] One side of the two guide shafts is embedded in the fixed seat, and the other side extends from the upper surface of the fixed seat, and the end of the extended part is embedded in the marker fixing plate; the adjusting screw is screwed into the through hole of the marker fixing plate, and the adjusting screw has a certain length, and the length of the screwing part is greater than the distance between the fixed seat and the marker fixing plate; by rotating the adjusting screw, the adjusting screw can fine-tune the marker fixing plate;

[0031] The joint bearing is embedded in the marker fixing plate, and the joint bearing is a spherical sliding bearing, and the sliding contact surface is an inner spherical surface and an outer spherical surface, and can rotate and swing at any angle during movement; the outer spherical surface of the joint bearing is fixed with the marker fixing plate, and the inner spherical surface of the joint bearing is inserted into the marker fixing rod;

[0032] The top end of the marker fixing rod is provided with a marker, and the bottom end of the marker fixing rod is connected with the laser emitter mounting seat;

[0033] The bottom end of the laser emitter mounting seat is in contact with the laser emitter, the emission direction of the laser emitter is downward, and one end of the non-emission direction of the laser emitter is a press switch;

[0034] The laser emitter adjusting seat is a cylindrical structure, the laser emitter is located in the inside of the laser emitter adjusting seat, the inner diameter of the upper part of the laser emitter adjusting seat is wide and is connected with the laser emitter mounting seat through threads, the inner diameter of the middle part is slightly larger than the diameter of the laser emitter, and the inner diameter of the bottom part is smaller than the diameter of the laser emitter but larger than the diameter of the laser;

[0035] Tighten the laser emitter adjusting seat, the press switch of the laser emitter is triggered, the laser emitter emits laser, and vice versa, loosen the laser emitter adjusting seat, and the laser emitter stops emitting laser.

[0036] In any of the above technical solutions, further, the test process of the direct visual field test device comprises:

[0037] First, install the video auxiliary device on the driver's seat of the vehicle, install the coordinate confirmation rod on the installation hole corresponding to the E2 eye point of the video auxiliary device, and adjust the angle adjustment fixing block, the height adjustment mechanism and the holder adjustment mechanism in sequence to make the top end of the coordinate confirmation rod coincide with the target E2 eye point;

[0038] Remove the coordinate confirmation rod, install the laser level on the installation hole corresponding to the E2 eye point of the video auxiliary device, adjust the laser emission port angle of the laser level, make the laser level emit plane light beams to both sides of the vehicle head, and form a reference line on the ground, which is parallel to the Y direction and represents the coordinates of the video auxiliary device in the X direction; take the reference line as the starting point, draw a line parallel to the reference line on the ground at a position 1m away from the vehicle head in the direction of the vehicle tail as a cut-off line; draw grid lines in the area towards the vehicle head direction of the cut-off line, and the length of each grid of the grid lines is 0.1m;

[0039] Remove the laser level and install the pan / tilt camera at the mounting holes corresponding to the E1, E2, and E3 eye points of the video assist device to observe the left, front, and right areas of the cab respectively;

[0040] The marker device enters the grid line area, and the laser emitter of the marker device is activated to emit laser light toward the ground, confirming the projection position of the marker on the ground, so that the irradiation point of the laser light is located on the grid line;

[0041] The marker device is moved from far to near in the left, front, and right areas of the cab, respectively, to keep the laser emitted by the laser transmitter always on the same grid line. When the pan / tilt camera of the video assist device just loses sight of the marker, the position of the laser emitted by the laser transmitter at this time is recorded. The test is repeated until the laser position on each grid line is recorded. Then, the height of the marker is adjusted to other specified heights and the above test steps are repeated until the data for all test heights are recorded.

[0042] After all the above tests are completed, the complete field of view measurement data is obtained.

[0043] The beneficial effects of the present invention are:

[0044] The present invention provides a direct visual field testing device, which has the following beneficial effects:

[0045] High test accuracy: The device uses laser-assisted positioning, joint bearing design and precise marker adjustment mechanism to ensure high-precision positioning of the marker within the test area, reducing deviations caused by uneven ground or manual operation errors, and improving the reliability of test data.

[0046] Strong adaptability: The height adjustment mechanism, angle adjustment mechanism and pan / tilt adjustment mechanism of the video auxiliary device support flexible adjustment in three directions. The marker device can adapt to various testing needs through the height adjustment rod and replaceable markers, which can meet the diverse requirements of different vehicles, drivers and test environments.

[0047] High test efficiency: Through modular design, video auxiliary devices and marker devices can be quickly installed and adjusted, and the pan-tilt camera realizes real-time image acquisition and recording, which greatly reduces test preparation time and data collection time, and improves overall test efficiency.

[0048] Easy to operate: The marker device is equipped with bottom casters, which allows for quick movement and locking of the position within the test area. The video assist device is ergonomically designed and easy to adjust, reducing the operator's usage threshold and learning cost.

[0049] Result visualization: The status and position of markers are collected in real time by the pan-tilt camera. Combined with the baseline generated by the laser level, the distribution of markers within the driver's field of view can be intuitively recorded, facilitating later analysis and data application.

[0050] Modularity and scalability: The device is designed with a modular structure. The video auxiliary device and marker device can be installed and used independently. It is easy to disassemble and maintain, supports functional expansion based on existing equipment, and has good compatibility and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The advantages of the above and additional aspects of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0052] Figure 1 is a schematic diagram of a test environment of a direct visual field testing device according to an embodiment of the present invention;

[0053] Figure 2 is a schematic diagram of a video-assisted device for a direct visual field testing device according to an embodiment of the present invention;

[0054] Figure 3 is a schematic diagram of a marker device of a direct visual field testing device according to one embodiment of the present invention;

[0055] Figure 4 4 is a cross-sectional schematic diagram of a visual marker mechanism of a direct visual field testing device according to an embodiment of the present invention.

[0056] Among them, 1- video auxiliary device, 2- marker device, 11- base plate, 12- angle adjustment support rod, 13- angle adjustment fixed block, 14- main body support rod, 15- height adjustment mechanism, 16- pan-tilt adjustment mechanism, 17- pan-tilt camera, 18- pan-tilt fixed seat, 19- coordinate confirmation rod, 21- base, 22- adjustment rod fixed seat, 23- height adjustment rod, 24- marker bearing mechanism, 25- marker, 241- fixed seat, 242- guide shaft, 243- marker fixing plate, 244- adjustment screw, 245- marker fixing rod, 246- joint bearing, 247- laser mounting seat, 248- laser emitter, 249- laser adjustment seat. DETAILED DESCRIPTION

[0057] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0059] like Figure 1 As shown, this embodiment provides a direct visual field testing device, which is mainly used to test the driver's visible range when driving a motor vehicle, including: a video auxiliary device 1 and a marker device 2.

[0060] The video assist device 1 includes: a base plate 11, an angle adjustment support rod 12, an angle adjustment fixing block 13, a main body support rod 14, a height adjustment mechanism 15, a pan / tilt adjustment mechanism 16, a pan / tilt camera 17, a pan / tilt fixing seat 18, a coordinate confirmation rod 19 and a laser level.

[0061] The base plate 11 is located at the bottom of the video auxiliary device 1 and is used to fix and support the main structure above. The base plate 11 can be directly installed on the driver's seat of the vehicle to ensure that the device is firmly combined with the vehicle.

[0062] The angle adjustment support rod 12 is connected to the base plate 11 and is connected to the main support rod 14 through the angle adjustment fixing block 13; one end of the angle adjustment fixing block 13 is connected to the main support rod 14 through a fixed point, and the angle adjustment fixing block 13 can rotate around the fixed point. The other end of the angle adjustment fixing block 13 has a hollow slide groove, which is slidably connected to the angle adjustment support rod 12. When the slide groove slides, the main support rod 14 tilts accordingly, thereby adjusting the angle of the video auxiliary device 1 on the XZ plane (the straight line where the projection of the angle adjustment fixing block 13 on the base plate 11 is located is the X-axis, the vertical direction is the Z-axis, and the direction perpendicular to the X and Z axes is the Y-axis) to adapt to different tilt angles of the vehicle seat.

[0063] The main support rod 14 is hinged on the bottom plate 11. The main support rod 14 serves as the main skeleton of the video auxiliary device 1, supports the main structure of the video auxiliary device 1, and provides installation support points for various components.

[0064] The height adjustment mechanism 15 is a telescopic structure installed above the main support rod 14. The top of the height adjustment mechanism 15 can move up and down along the main support rod 14. The main function of the height adjustment mechanism 15 is to adjust the height coordinate of the eye point to meet the needs of different vehicles or tests.

[0065] The pan-tilt adjustment mechanism 16 is fixed on the top of the height adjustment mechanism 15 , and a pan-tilt fixing seat 18 is installed on the top of the pan-tilt adjustment mechanism 16 . The pan-tilt adjustment mechanism 16 includes: a Y-direction sliding plate, an X-direction sliding plate and an angle adjustment structure.

[0066] The Y-direction sliding plate is slidably connected to the top of the height adjustment mechanism 15 through a slide rail. A fixed pulley is provided on the top of the height adjustment mechanism 15 so that the structure above it can be displaced along the Y direction. A fixed pulley is provided on the top of the Y-direction sliding plate, and the X-direction sliding plate is connected to the top of the Y-direction sliding plate through its own bottom slide rail so that the structure above it can be displaced along the X direction.

[0067] The angle adjustment structure is fixed on the top of the X-axis sliding plate, and the angle adjustment structure includes a horizontal bearing, a vertical bearing and an operating lever; the shaft core of the horizontal bearing is fixed to the X-axis sliding plate, and the shaft core of the vertical bearing is fixedly connected to the shaft wheel of the horizontal bearing. The operating lever and the pan-tilt fixing seat 18 are both fixed to the shaft wheel of the vertical bearing. By controlling the operating lever, the pan-tilt fixing seat 18 can be rotated in all directions.

[0068] There are three holes on the upper surface of the pan-tilt fixing seat 18, which are the installation holes corresponding to the eye points E1, E2, and E3. E1 is used to observe the left area of ​​the cab, E2 is used to observe the front area of ​​the cab, and E3 is used to observe the right area of ​​the cab. The three holes are used to install the coordinate confirmation rod 19, the laser level, and the pan-tilt camera 17 according to the test progress.

[0069] The pan-tilt camera 17 is installed on any hole on the upper surface of the pan-tilt fixing seat 18. The lens position of the pan-tilt camera 17 is consistent with the eye point heights of E1, E2, and E3. The pan-tilt camera 17 can capture the status and position of the marker in real time and display the image through a mobile phone or other device for easy observation and recording.

[0070] The coordinate confirmation rod 19 is installed on the mounting hole corresponding to the E2 eye point on the upper surface of the pan-tilt mounting base 18. The height of the coordinate confirmation rod 19 is consistent with the lens height of the pan-tilt camera 17. After the coordinate confirmation rod 19 is installed, its vertex coincides with the E2 eye point, thereby providing an accurate reference point.

[0071] The laser level is installed on the mounting hole corresponding to the E2 eye point on the upper surface of the pan-tilt mount 18. The laser level is a measuring tool that can project a straight line or a plane light beam and is used to accurately calibrate reference lines or reference points. In this embodiment, it is used to generate reference lines to help draw grid lines in the test area. The laser emission port of the laser level can be rotated relative to the mounting surface of the pan-tilt mount 18.

[0072] The video assist device 1 can be flexibly installed on the driver's seat of a vehicle or independently installed on a dedicated base plate; the device uses displacement adjustment functions in the X, Y, and Z directions, as well as angle adjustment functions around the X, Y, and Z axes to ensure that the spatial positions of the three eye points E1, E2, and E3 can be accurately determined.

[0073] The marker device 2 includes a base 21 , an adjustment rod fixing seat 22 , a height adjustment rod 23 , a marker carrying mechanism 24 and a marker 25 .

[0074] The base 21 is the supporting structure of the marker device 2 and consists of a rectangular metal plate with casters. A caster is installed at each corner of the base 21. These casters can rotate around the installation axis to move the marker device 2 in various directions. These casters are equipped with a locking function to fix the position of the marker device 2; a circle of screw holes is designed on the upper surface of the base 21 for fixing the adjustment rod fixing base 22.

[0075] The adjusting rod fixing seat 22 is installed on the upper surface of the base 21. The adjusting rod fixing seat 22 is an upright segmented metal cylindrical structure. The bottom of the adjusting rod fixing seat 22 is connected to the screw hole on the upper surface of the base 21 through bolts.

[0076] The height adjustment rod 23 is inserted from above into the adjustment rod fixing seat 22 to complete the connection with it. The height adjustment rod 23 is a hollow metal cylindrical rod. The marker carrying mechanism 24 slides into the outer ring of the height adjustment rod 23 from above. The surface of the rod body is engraved with scale lines to facilitate the operator to observe and set the specific height of the marker carrying mechanism 24.

[0077] The marker carrying mechanism 24 includes: a fixing seat 241, a guide shaft 242, a marker fixing plate 243, an adjustment screw 244, a marker fixing rod 245, a joint bearing 246, a laser mounting seat 247, a laser emitter 248, and a laser adjustment seat 249.

[0078] The fixing seat 241 is sleeved on the outer surface of the height adjustment rod 23 . The fixing seat 241 clamps the height adjustment rod 23 by tightening a bolt on one side, so that the fixing seat 241 is fixed at a specific position on the height adjustment rod 23 .

[0079] One side of the two guide shafts 242 is embedded in the fixing seat 241, and the other side extends from the upper surface of the fixing seat 241, and the end of the extended part is embedded in the marker fixing plate 243; the adjusting screw 244 is screwed into the through hole of the marker fixing plate 243, and the adjusting screw 244 has a certain length, and the length of the screwable part is greater than the distance between the fixing seat 241 and the marker fixing plate 243; by rotating the adjusting screw 244, the adjusting screw 244 can fine-tune the marker fixing plate 243.

[0080] The joint bearing 246 is embedded in the marker fixing plate 243. The joint bearing 246 is a spherical sliding bearing whose sliding contact surface is an inner sphere and an outer sphere. It can rotate and swing at any angle during movement; the outer sphere of the joint bearing 246 is fixed to the marker fixing plate 243, and the marker fixing rod 245 is inserted into the inner sphere of the joint bearing 246; the joint bearing 246 ensures that the marker fixing rod 245 and the object fixedly connected to the marker fixing rod 245 are always consistent with the direction of gravity to prevent interference caused by factors such as uneven road surface.

[0081] A marker 25 is set at the top of the marker fixing rod 245. In this embodiment, the marker 25 is a sphere with a diameter of 30 mm and can be replaced with 5 colors. The appropriate color can be selected according to the test environment for easy identification; the bottom end of the marker fixing rod 245 is connected to the laser mounting seat 247.

[0082] The bottom end of the laser mounting base 247 contacts the laser emitter 248 , the emission direction of the laser emitter 248 faces downward, and the end of the laser emitter 248 facing the non-emission direction is a push-type switch.

[0083] The laser adjustment seat 249 is a cylindrical structure, and the laser emitter 248 is located inside the laser adjustment seat 249. The inner diameter of the upper part of the laser adjustment seat 249 is wider and is connected to the laser mounting seat 247 by threads. The inner diameter in the middle is slightly larger than the diameter of the laser emitter 248, and the inner diameter at the bottom is smaller than the diameter of the laser emitter 248 but larger than the laser diameter.

[0084] When the laser adjustment seat 249 is tightened, the push switch of the laser emitter 248 is triggered, and the laser emitter 248 emits laser. Conversely, when the laser adjustment seat 249 is loosened, the laser emitter 248 stops emitting laser.

[0085] Marker Device 2 simulates a reference target within the field of view. Its design allows for continuous adjustment across a range of marker heights, covering all required test heights in standard testing. To ensure the marker remains vertical, the device incorporates an articulated bearing design. A bottom-mounted laser emitter ensures that the marker's central axis is coaxial with the laser beam. In practice, the laser aids in confirming the marker's ground projection, effectively reducing measurement errors even on uneven surfaces.

[0086] During the test of the direct visual field test device, the video auxiliary device 1 is first installed on the driver's seat of the vehicle, and the coordinate confirmation rod 19 is installed on the mounting hole corresponding to the E2 eye point of the video auxiliary device 1. The angle adjustment fixing block 13, the height adjustment mechanism 15 and the pan / tilt adjustment mechanism 16 are adjusted in sequence to make the top of the coordinate confirmation rod 19 coincide with the target E2 eye point.

[0087] Remove the coordinate confirmation rod 19, install a laser level on the mounting hole corresponding to the E2 eyepoint of the video auxiliary device 1, adjust the angle of the laser emission port of the laser level so that the laser level emits a plane light beam to both sides of the front of the vehicle, forming a reference line on the ground. The reference line is parallel to the Y-axis and represents the coordinate of the video auxiliary device 1 on the X-axis; starting from the reference line, draw a line parallel to the reference line on the ground at a position 1m from the front of the vehicle to the rear of the vehicle as the end line; draw grid lines in the area where the end line is facing the front of the vehicle, and the side length of each grid is 0.1m.

[0088] Remove the laser level and install the pan / tilt camera 17 on the mounting holes corresponding to the E1, E2, and E3 eye points of the video auxiliary device 1 to observe the left, front, and right areas of the cab respectively.

[0089] The marker device 2 enters the grid line area, and the laser emitter 248 of the marker device 2 is activated to emit laser light toward the ground, confirming the projection position of the marker 25 on the ground, so that the irradiation point of the laser is located on the grid line.

[0090] The marker device 2 is moved from far to near in the left, front and right areas of the cab respectively, so as to keep the laser emitted by the laser emitter 248 always located on the same grid line.

[0091] When the pan / tilt camera 17 of the video assist device 1 just fails to see the marker 25 , the position of the laser emitted by the laser emitter 248 is recorded; the test is repeated until the laser position on each grid line is recorded.

[0092] Subsequently, the marker height is adjusted to other specified heights and the above test steps are repeated until the data of all test heights are recorded.

[0093] After completing all the above tests, we obtained complete field of view measurement data. This data comprehensively considers the test results in different directions and can effectively reflect the driver's actual field of view, ensuring the accuracy of the measurement and the reliability of the test results.

[0094] In summary, the present invention proposes a direct visual field testing device, comprising: a video auxiliary device 1 and a marker device 2 .

[0095] The video assistance device 1 is installed on the driver's seat of the vehicle, and the posture of the video assistance device 1 is adjusted according to the required spatial positions of the preset eye points E1, E2, and E3.

[0096] The marker device 2 simulates a reference target within the vehicle's field of view and can be continuously adjusted between different marker height ranges to cover all test heights required in the standard test. The marker device 2 emits a laser downward to indicate the projected position of the marker on the ground.

[0097] The camera of the video assistance device is adjusted to observe the markers and record the vehicle's observable field of view.

[0098] In the present invention, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; and "connected" may refer to a direct connection or an indirect connection via an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0099] The shapes of the various components in the drawings are schematic, and certain differences from their actual shapes are not excluded. The drawings are only used to illustrate the principles of the present invention and are not intended to limit the present invention.

[0100] Although the present invention has been disclosed in detail with reference to the accompanying drawings, it should be understood that these descriptions are merely illustrative and are not intended to limit the application of the present invention. The scope of the present invention is defined by the appended claims and includes various modifications, variations, and equivalents made to the invention without departing from the scope and spirit of the present invention.

Claims

1. A direct visual field testing device, characterized in that: The direct visual field testing device comprises: a video auxiliary device (1) and a marker device (2); The video auxiliary device (1) is installed on the driver's seat of the vehicle, and the posture of the video auxiliary device (1) is adjusted according to the spatial positions of the preset eye points E1, E2, and E3 as required; The marker device (2) simulates a reference target within the vehicle's field of view and can be continuously adjusted between different marker height ranges to cover all test heights required in the standard test. The marker device (2) emits a laser downward to indicate the projected position of the marker on the ground. By adjusting the camera of the video assist device to observe the marker, the observable field of view of the vehicle is recorded; The video auxiliary device (1) comprises: a base plate (11), an angle adjustment support rod (12), an angle adjustment fixing block (13), a main body support rod (14), a height adjustment mechanism (15), a pan / tilt adjustment mechanism (16), a pan / tilt camera (17), a pan / tilt fixing seat (18) and a coordinate confirmation rod (19); The bottom plate (11) is located at the bottom of the video auxiliary device (1), fixing and supporting the main structure above, and the bottom plate (11) is installed on the driver's seat of the vehicle; The angle adjustment support rod (12) is connected to the bottom plate (11), and the angle adjustment support rod (12) is connected to the main support rod (14) through the angle adjustment fixing block (13); one end of the angle adjustment fixing block (13) is connected to the main support rod (14) through a fixed point, and the angle adjustment fixing block (13) rotates around the fixed point. The other end of the angle adjustment fixing block (13) has a hollow slide groove, which is slidably connected to the angle adjustment support rod (12), and the main support rod (14) is hinged on the bottom plate (11); The height adjustment mechanism (15) is a telescopic structure installed above the main body support rod (14), and the top end of the height adjustment mechanism (15) moves up and down along the main body support rod (14); The pan / tilt adjustment mechanism (16) is fixed on the top of the height adjustment mechanism (15), and a pan / tilt fixing seat (18) is installed on the top of the pan / tilt adjustment mechanism (16). The upper surface of the pan / tilt fixing seat (18) has three holes, which are mounting holes corresponding to eye points E1, E2, and E3, respectively. E1 is used to observe the left side area of ​​the cab, E2 is used to observe the front side area of ​​the cab, and E3 is used to observe the right side area of ​​the cab; The pan-tilt camera (17) is mounted on any hole on the upper surface of the pan-tilt fixing seat (18), and the lens position of the pan-tilt camera (17) is consistent with the eye point heights of E1, E2, and E3; The coordinate confirmation rod (19) is installed on the mounting hole corresponding to the E2 eye point on the upper surface of the pan-tilt mounting base (18). The height of the coordinate confirmation rod (19) is consistent with the lens height of the pan-tilt camera (17). After the coordinate confirmation rod (19) is installed, its vertex coincides with the E2 eye point, thereby providing an accurate reference point.

2. The direct visual field testing device according to claim 1, wherein The pan / tilt adjustment mechanism (16) comprises: a Y-direction sliding plate, an X-direction sliding plate and an angle adjustment structure; The Y-direction sliding plate is slidably connected to the top of the height adjustment mechanism (15) through a slide rail, and a fixed pulley is provided on the top of the height adjustment mechanism (15) so that the structure above it is displaced in the Y direction, where the Y direction is the left and right direction of the cab; a fixed pulley is provided on the top of the Y-direction sliding plate, and the X-direction sliding plate is connected to the top of the Y-direction sliding plate through its own bottom slide rail so that the structure above it is displaced in the X direction, where the X direction is the front and rear direction of the cab; The angle adjustment structure is fixed on the top of the X-direction sliding plate, and the angle adjustment structure includes a horizontal bearing, a vertical bearing and an operating rod; the shaft core of the horizontal bearing is fixed to the X-direction sliding plate, the shaft core of the vertical bearing is fixedly connected to the shaft wheel of the horizontal bearing, and the operating rod and the pan / tilt fixing seat (18) are both fixed to the shaft wheel of the vertical bearing. By controlling the operating rod, the pan / tilt fixing seat (18) can be rotated in all directions.

3. The direct visual field testing device according to claim 1, wherein The video assistance device (1) further comprises: a laser level; The laser level is mounted on a mounting hole corresponding to the E2 eye point on the upper surface of the pan / tilt mount (18), and the laser level can project a plane beam; the laser emission port of the laser level rotates relative to the mounting surface of the pan / tilt mount (18).

4. The direct visual field testing device according to claim 1, wherein The marker device (2) comprises: a base (21), an adjustment rod fixing seat (22), a height adjustment rod (23), a marker carrying mechanism (24) and a marker (25); The base (21) is a supporting structure for the marker device (2) and is composed of a rectangular metal plate with casters. A caster is installed at each of the four corners of the base (21). These casters rotate around the mounting axis to move the marker device (2) in various directions. These casters are equipped with a locking function to fix the position of the marker device (2). A circle of screw holes is designed on the upper surface of the base (21) for fixing the adjustment rod fixing seat (22); The adjusting rod fixing seat (22) is mounted on the upper surface of the base (21). The adjusting rod fixing seat (22) is an upright segmented metal cylindrical structure. The bottom of the adjusting rod fixing seat (22) is connected to the screw hole on the upper surface of the base (21) through a bolt. The height adjustment rod (23) is inserted from above into the adjustment rod fixing seat (22) to complete the connection therewith. The height adjustment rod (23) is a hollow metal cylindrical rod. The marker carrying mechanism (24) slides into the outer ring of the height adjustment rod (23) from above. The outer surface of the rod body is engraved with scale lines. The marker (25) is set on the marker carrying mechanism (24).

5. The direct visual field testing device according to claim 4, characterized in that: The marker bearing mechanism (24) comprises: a fixing seat (241), a guide shaft (242), a marker fixing plate (243), an adjustment screw (244), a marker fixing rod (245), a joint bearing (246), a laser mounting seat (247), a laser emitter (248), and a laser adjustment seat (249); The fixing seat (241) is sleeved on the outer surface of the height adjustment rod (23), and the fixing seat (241) clamps the height adjustment rod (23) by tightening a bolt on one side, so that the fixing seat (241) is fixed at a specific position on the height adjustment rod (23); One side of the two guide shafts (242) is embedded in the fixing seat (241), and the other side extends from the upper surface of the fixing seat (241), and the end of the extended portion is embedded in the marker fixing plate (243); the adjusting screw (244) is screwed into the through hole of the marker fixing plate (243), and the adjusting screw (244) has a certain length, and the length of the screwable portion thereof is greater than the distance between the fixing seat (241) and the marker fixing plate (243); by rotating the adjusting screw (244), the adjusting screw (244) fine-tunes the marker fixing plate (243); The joint bearing (246) is embedded in the marker fixing plate (243). The joint bearing (246) is a spherical sliding bearing whose sliding contact surface is an inner spherical surface and an outer spherical surface, and rotates and swings at any angle during movement. The outer spherical surface of the joint bearing (246) is fixed to the marker fixing plate (243), and the marker fixing rod (245) is inserted into the inner spherical surface of the joint bearing (246). A marker (25) is provided at the top of the marker fixing rod (245), and a bottom end of the marker fixing rod (245) is connected to a laser mounting seat (247); The bottom end of the laser mounting seat (247) contacts the laser emitter (248), the emission direction of the laser emitter (248) faces downward, and the end of the laser emitter (248) in the non-emission direction is a push-type switch; The laser adjustment seat (249) is a cylindrical structure, the laser emitter (248) is located inside the laser adjustment seat (249), the inner diameter of the upper portion of the laser adjustment seat (249) is wider and is connected to the laser mounting seat (247) by a thread, the inner diameter of the middle portion is slightly larger than the diameter of the laser emitter (248), and the inner diameter of the bottom portion is smaller than the diameter of the laser emitter (248) but larger than the laser diameter; When the laser adjustment seat (249) is tightened, the push switch of the laser emitter (248) is triggered, and the laser emitter (248) emits laser light. Conversely, when the laser adjustment seat (249) is loosened, the laser emitter (248) stops emitting laser light.

6. The direct visual field testing device according to any one of claims 1 to 5, characterized in that: The testing process of the direct visual field testing device includes: First, the video assist device (1) is mounted on the driver's seat of the vehicle, and a coordinate confirmation rod (19) is mounted on the mounting hole corresponding to the E2 eye point of the video assist device (1). The angle adjustment fixing block (13), the height adjustment mechanism (15), and the pan / tilt adjustment mechanism (16) are adjusted in sequence so that the top of the coordinate confirmation rod (19) coincides with the target E2 eye point. Remove the coordinate confirmation rod (19), install a laser level on the mounting hole corresponding to the E2 eye point of the video auxiliary device (1), adjust the laser emission port angle of the laser level so that the laser level emits a plane beam toward both sides of the vehicle head, forming a reference line on the ground, the reference line is parallel to the Y direction, and represents the coordinate of the video auxiliary device (1) in the X direction; starting from the reference line, draw a line parallel to the reference line on the ground at a position 1m from the vehicle head to the vehicle tail as the end line; draw grid lines in the area where the end line faces the vehicle head, and the side length of each grid is 0.1m; Remove the laser level and install the pan / tilt camera (17) at the mounting holes corresponding to the E1, E2, and E3 eye points of the video auxiliary device (1) to observe the left, front, and right areas of the cab respectively; When the marker device (2) enters the grid line area, the laser emitter (248) of the marker device (2) is activated to emit laser light toward the ground, confirming the projection position of the marker (25) on the ground so that the irradiation point of the laser light is located on the grid line; The marker device (2) is moved from far to near in the left, front, and right areas of the cab, respectively, to keep the laser emitted by the laser emitter (248) always located on the same grid line; when the pan / tilt camera (17) of the video auxiliary device (1) just loses sight of the marker (25), the position of the laser emitted by the laser emitter (248) is recorded; the test is repeated until the laser position on each grid line is recorded; then, the height of the marker is adjusted to other specified heights, and the above test steps are repeated until the data of all test heights are recorded; After all the above tests are completed, the complete field of view measurement data is obtained.

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