Front view S area detection system and method

Abstract

The invention relates to a front visual field S area detection system and method, and relates to the technical field of finished automobiles, the front visual field S area detection system comprises a projection device which comprises a body frame provided with a projection plate; the moving device is arranged on the body frame, a distance measuring instrument is fixed to the moving device, and the moving device can move along the body frame so as to adjust the transverse position and the vertical position of the distance measuring instrument relative to the target vehicle; the light-emitting device is used for being arranged on a three-dimensional H-point device located in the target vehicle, the light-emitting device comprises an adjusting mechanism and a light source arranged on the adjusting mechanism, and the adjusting mechanism can adjust the transverse position, the longitudinal position and the vertical position of the light source relative to the target vehicle. According to the invention, the measurement efficiency can be improved, and the projection area calculation mode is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile technology, in particular to a front field of view S area detection system and method. BACKGROUND

[0002] The front field of view performance index of the automobile driver is a mandatory regulatory requirement, which focuses on the direct field of view of the driver and is also an important index of automobile active safety. The 4.4.2 clause of GB11562-2014 newly adds the percentage requirement of the projection of the obstacle in the S area (if the projection of the obstacle from the V2 point in the S area is not more than 20% of the area, the obstacle between the plane passing through the V2 point and the horizontal plane at a downward 1° and the plane passing through the V2 point and the horizontal plane at a downward 4° is allowed. If the steering wheel is adjustable, it should be placed in the normal position marked by the vehicle manufacturer or in the middle position of the adjustable range).

[0003] In view of this newly added mandatory regulatory requirement, in the real vehicle detection, a movable and adjustable S area projection device is placed in front of the vehicle to be detected, and the obstacle is projected onto the projection plate by the light emitting device. According to the obtained S area and the projection area of the obstacle in the S area, the percentage of the projection of the obstacle in the S area is calculated, so as to determine whether the detection index of the vehicle to be detected meets the regulatory requirements.

[0004] However, the relative position requirement of the S area projection device of the prior art to the vehicle to be detected is high, the attitude adjustment takes a long time, and there is a large error. SUMMARY

[0005] The present application provides a front field of view S area detection system and method, which can improve the measurement efficiency and simplify the projection area calculation method.

[0006] In a first aspect, the present application provides a front field of view S area detection system, which comprises: a projection device, comprising: a body frame, on which a projection plate is arranged; a moving device arranged on the body frame, a distance meter being fixed on the moving device, the moving device being movable along the body frame to adjust the lateral and vertical positions of the distance meter relative to the target vehicle; a light emitting device arranged on a three-dimensional H point device located in the target vehicle, the light emitting device comprising an adjusting mechanism and a light source arranged on the adjusting mechanism, the adjusting mechanism being capable of adjusting the lateral, longitudinal and vertical positions of the light source relative to the target vehicle.

[0007] In combination with the first aspect, in an embodiment, the adjusting mechanism comprises: a bracket body, which is arranged on a head space detection rod of the three-dimensional H point device, and is movable and fixable on the head space detection rod; an adjustable platform, which comprises: a fixing seat, which is connected with the bracket body; a sliding table, which carries the light source, and is movable relative to the fixing seat to adjust the lateral and longitudinal positions of the light source relative to the target vehicle.

[0008] In combination with the first aspect, in an embodiment, the adjustable platform further comprises: a universal joint, one end of which is connected with the bracket body, and the other end of which is connected with the fixing seat.

[0009] In combination with the first aspect, in an embodiment, a level is further arranged on the fixing seat.

[0010] In combination with the first aspect, in an embodiment, a positioning device is further arranged on the sliding table, and the positioning device is provided with a mark for assisting the positioning of the light source.

[0011] In combination with the first aspect, in an embodiment, the light source comprises a light-transmitting cover, the light-transmitting cover is provided with a light source and a baffle for light collection inside, and a coating is arranged on a side of the light-transmitting cover close to the positioning device, and a side of the light-transmitting cover away from the positioning device is transparent.

[0012] In combination with the first aspect, in an embodiment, the moving device comprises: two lateral sliding blocks, each of which is arranged on the body frame, and each of which is slidable along the body frame to adjust the lateral position of itself relative to the target vehicle; two longitudinal sliding blocks, each of which is arranged on one of the lateral sliding blocks, each of which is provided with the distance meter, and each of which is slidable along the lateral sliding block to adjust the vertical position of itself relative to the target vehicle.

[0013] In the second aspect, the embodiments of the present application provide a front visual field S area detection method, which comprises: calibrating a measuring point on the target vehicle, measuring the distance from the measuring point by the distance meter, and adjusting the position of the projection device so that the projection device is perpendicular to the target vehicle; adjusting the lateral, longitudinal and vertical positions of the light source relative to the target vehicle by the adjusting mechanism so that the light source coincides with the V2 point; turning on the light source, and projecting the S area boundary marked on the windshield glass and the obstacle onto the projection plate; According to the ratio of the projection area of the obstacle and the S area on the projection board, the obstacle proportion of the S area of the front view field is determined.

[0014] In combination with the second aspect, in an implementation, the mobile device comprises: two lateral sliders, each of which is arranged on the body frame and is slidable along the body frame to adjust the lateral position of itself relative to the target vehicle; two longitudinal sliders, each of which is arranged on one of the lateral sliders, each of which is provided with the distance meter, and the longitudinal slider is slidable along the lateral slider to adjust the vertical position of itself relative to the target vehicle; the calibration of the measurement point on the target vehicle, the measurement of the distance from the measurement point by the distance meter, and the adjustment of the position of the projection device so that the projection device is perpendicular to the target vehicle, comprising: calibration of the measurement point at two rearview mirrors of the target vehicle; adjustment of the two lateral sliders and the two longitudinal sliders, and adjustment of the position of the projection device so that the two distance meters are aligned with the positions of the measurement points and the measured distances are equal.

[0015] In combination with the second aspect, in an implementation, the slide table is further provided with a positioning device, and the positioning device is provided with an identifier for assisting positioning of the light source; the adjustment of the lateral, longitudinal and vertical positions of the light source relative to the target vehicle by the adjustment mechanism so that the light source coincides with the V2 point, comprising: based on the relative position relationship between the identifier on the positioning device and the light source, adjustment of the lateral, longitudinal and vertical positions of the identifier on the positioning device relative to the target vehicle by the adjustment mechanism so that the identifier on the positioning device reaches the target position, thereby making the light source coincide with the V2 point.

[0016] The technical scheme provided by the embodiments of the present application has the following beneficial effects: The front view field S area detection system of the present application comprises a projection device 1 and a light emitting device 2, the projection device 1 comprises a body frame 11 and a mobile device, and the body frame 11 is provided with a projection board 12; the mobile device is arranged on the body frame 11, and the mobile device is fixed with a distance meter 13, and the mobile device is movable along the body frame 11 to adjust the lateral and vertical positions of the distance meter 13 relative to the target vehicle; the light emitting device 2 is arranged on a three-dimensional H point device in the target vehicle, and the light emitting device 2 comprises an adjustment mechanism and a light source 21 arranged on the adjustment mechanism, and the adjustment mechanism can adjust the lateral, longitudinal and vertical positions of the light source 21 relative to the target vehicle.

[0017] This application solves the technical problems of long coordinate measurement and photography, complex and error-prone S-area projection device attitude adjustment, and cumbersome area calculation in traditional real vehicle inspection by directly projecting the boundary and obstacles of the S-area onto the projection board and measuring their length and width to quickly calculate the area. It significantly improves the inspection efficiency, simplifies the calibration process, and ensures ease of operation and measurement accuracy, making the obstacle detection process in the driver's field of vision faster and more reliable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the forward field of view S-region detection system of this application; Figure 2 This is a schematic diagram of the structure of an embodiment of the projection device of this application; Figure 3 This is a schematic diagram illustrating the alignment principle between the target vehicle and the projection board in this application. Figure 4 This is a first schematic diagram of the light-emitting device of this application installed in a three-dimensional H-point device; Figure 5 This is a second schematic diagram of the light-emitting device of this application installed in the three-dimensional H-point device; Figure 6 A schematic diagram defining the range of the projected region S; Figure 7 This is a schematic diagram of a three-dimensional coordinate system; Figure 8 This is a schematic diagram showing the position of point V when the seat back angle is 25°. Figure 9 This is a schematic diagram of the structure of one embodiment of the regulating mechanism of this application; Figure 10 This is a schematic diagram of the in-vehicle projection in this application; Figure 11 This is a schematic diagram of the measurement principle of this application; Figure 12 This is a flowchart illustrating an embodiment of the forward field of view S region detection method of this application.

[0020] In the diagram: 1. Projection device; 11. Main frame; 12. Projection board; 13. Rangefinder; 14. Horizontal slider; 15. Vertical slider; 2. Light-emitting device; 21. Light source; 22. Support body; 221. Bolt; 222. Nut; 23. Fixing seat; 24. Slide table; 25. Universal joint; 26. Positioning device; 3. Target vehicle; 31. Rearview mirror; 4. Platform; 5. Three-dimensional H-point device; 51. Seat plate; 52. Back plate; 53. Head space detection rod. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0022] In a first aspect, embodiments of this application provide a forward field of view S-region detection system.

[0023] In one embodiment, reference is made to Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the forward field-of-view S-region detection system of this application. Figure 1 As shown, the forward field of view S area detection system includes a projection device 1 and a light-emitting device 2.

[0024] Among them, see Figure 2 As shown, the projection device 1 includes a main frame 11 and a moving device. A projection plate 12 is provided on the main frame 11; the moving device is provided on the main frame 11, and a rangefinder 13 is fixed on the moving device. The moving device can move along the main frame 11 to adjust the lateral and vertical positions of the rangefinder 13 relative to the target vehicle 3.

[0025] Specifically, the moving device includes two horizontal sliders 14 and two vertical sliders 15.

[0026] Both lateral sliders 14 are mounted on the main body frame 11. The lateral sliders 14 can slide along the main body frame 11 to adjust their lateral position relative to the target vehicle 3. Each longitudinal slider 15 is mounted on a lateral slider 14. Each longitudinal slider 15 is equipped with a rangefinder 13 and can slide along the lateral sliders 14 to adjust its vertical position relative to the target vehicle 3.

[0027] Understandably, since the transverse slider 14 can move laterally along the main frame 11, it can adapt to vehicles of different widths, making measurement convenient; the longitudinal slider 15 is mounted on the transverse slider 14 and can move up and down along the transverse slider 14, thus adapting to rearview mirrors of different heights; the rangefinder 13 is placed on the longitudinal slider 15 and can measure the distance between the vehicle rearview mirror and the projection board 12, improving the efficiency of vertical calibration between the vehicle and the projection board.

[0028] See Figure 3 As shown, this is a schematic diagram illustrating the alignment principle between the vehicle and the projection board. In this embodiment, the target vehicle 3 and the projection device 1 are placed on the platform 4, and measurement points are symmetrically calibrated at the two rearview mirrors 31 of the target vehicle 3. Then, the two horizontal sliders 14 and the two vertical sliders 15 are adjusted, and the position of the projection device 1 is adjusted so that the two rangefinders 13 are aligned with the measurement points and the measured distances are equal. Figure 3 When H1 and H2 are equal, the projection device 1 can be considered perpendicular to the target vehicle 3. Preferably, the rangefinder 13 is a laser rangefinder, but other types of rangefinders can be selected as needed, and this embodiment does not impose any restrictions.

[0029] See Figure 4 and Figure 5 As shown, the light-emitting device 2 is used to be installed on the three-dimensional H-point device 5 located inside the target vehicle 3. The light-emitting device 2 includes an adjustment mechanism and a light source 21 installed on the adjustment mechanism. The adjustment mechanism can adjust the lateral, longitudinal and vertical positions of the light source 21 relative to the target vehicle 3.

[0030] It should be noted that the three-dimensional H-point device 5 includes a seat plate 51, a back plate 52, and a head space detection rod 53. The entire device is placed on the car seat and is an essential test device for testing the driver's forward visibility performance and calibrating the S-zone. For details on the three-dimensional H-point device 5, please refer to the national standard; this embodiment will not elaborate further.

[0031] For the definition of the forward field of view S area, please refer to [link to relevant documentation]. Figure 6 As shown, in the national standard, the "S" region is a region perpendicular to the X-axis, 1500mm in front of point V2. Figure 1 and Figure 6The quadrilateral vertical region in the plane at point D) is defined by the intersection of a plane inclined 1° downwards and forwards from point V2 with a horizontal vertical plane located 1500mm in front of point V2. The lower boundary of the "S" region is defined by the intersection of a plane inclined 4° downwards and forwards from point V2 with a horizontal vertical plane located 1500mm in front of point V2. The left and right boundaries of the "S" region are defined by the vertical lines formed by the intersections of three planes inclined at 4° and the horizontal vertical plane located 1500mm in front of point V2. If the windshield extends forward beyond 1500mm from point V2, the distance between region "S" and point V2 can be increased accordingly. For the three planes inclined at 4°, all three planes form a 4° angle downwards from the horizontal, with one plane perpendicular to the Y-reference plane and the other two planes perpendicular to the X-reference plane. For information on reference planes, please refer to [link to relevant documentation]. Figure 7 The definition in [the document / reference].

[0032] Regarding point V, the national standard stipulates that within the passenger compartment, it is the longitudinal vertical plane passing through the center line of the front outer seating position, related to point R and the designed seat back angle. This point is used to check whether the vehicle's visibility meets the requirements.

[0033] The R-point seat reference point is a design point specified by the vehicle manufacturer for each seating position, determined relative to a three-dimensional coordinate system. The position of the V-point relative to the R-point is determined by the X, Y, and Z coordinates of the three-dimensional coordinate system. The V-point includes V1 and V2; in this embodiment, V2 is primarily used to determine the forward field of view area S. For more information on V1, V2, and the R-point, please refer to [link to relevant documentation]. Figure 8 The relevant provisions in the national standards will not be repeated here. Figure 8 In the diagram, 1 represents the trace along the longitudinal mid-plane of the car, 2 represents the trace along the longitudinal vertical plane passing through point R, and 3 represents the trace along the longitudinal vertical plane passing through points V1 and V2.

[0034] See Figure 9 As shown, in order to adjust the lateral, longitudinal and vertical positions of the light source 21 relative to the target vehicle 3, in this embodiment, the adjustment mechanism includes a bracket body 22 and an adjustable platform. The adjustable platform includes a fixed base 23 and a slide 24 that carries the light source 21.

[0035] The bracket body 22 is used to be mounted on the head space detection rod 53 of the three-dimensional H-point device 5, and can move along the head space detection rod 53 and be fixed on the head space detection rod 53; the fixed seat 23 is connected to the bracket body 22; the slide table 24 can move relative to the fixed seat 23 to adjust the lateral and longitudinal positions of the light source 21 relative to the target vehicle 3.

[0036] Specifically, in the Z-axis direction, the support body 22 can be adjusted by moving up and down on the head space detection rod 53. In this embodiment, the support body 22 is generally clamp-shaped and can be fitted onto the head space detection rod 53. The ear can then be locked in place by bolts 221 and nuts 222. In the X and Y-axis directions, the slide table 24 can be adjusted by moving the vehicle left and right and forward and backward, thereby realizing the adjustment of the three-dimensional spatial position of the light source 21.

[0037] In addition, in one embodiment, the adjustable platform further includes a universal joint 25, one end of which is connected to the support body 22, and the other end is connected to the fixed base 23. The universal joint 25 allows for adjustment of the levelness of the adjustment mechanism. For ease of observation, a level is also provided on the fixed base 23.

[0038] It should be noted that, in order to facilitate the positioning of the light source 21, a positioning device 26 is also provided on the slide 24. The positioning device 26 is provided with a mark to assist in the positioning of the light source 21. The positioning mark can be a cross-shaped mark or other types of marks. Since it is not convenient to directly observe the light-emitting point of the light source 21, after knowing the relative positional relationship between the positioning mark and the light-emitting point of the light source 21, the positioning mark can be used to help determine whether the light-emitting point of the light source 21 is in place.

[0039] In one embodiment, the light source 21 includes a light-transmitting cover, which contains a point light source and a baffle for focusing light. The side of the light-transmitting cover closest to the positioning device 26 has a coating, while the side furthest from the positioning device 26 is transparent. That is, the light source 21 uses a dedicated bulb, and its light emission point is essentially focused on a single point, thus it can be considered a point light source. Furthermore, since the forward field of view S area detection is typically within a 180° forward region, a coating is provided on one side of the light-transmitting cover to reduce the influence of stray light.

[0040] The following is an introduction to the principle of the forward field of view S-region detection system: First, the light source 21 is kept horizontal with the ground by the adjustment mechanism. Then, the adjustment mechanism is used to adjust the X, Y, and Z directions. Finally, based on the auxiliary judgment of the positioning device 26, the light emission point of the light source 21 is aligned with the measurement point V. ２ coincide.

[0041] After the position adjustment is complete, turn on light source 21. (See below) Figure 1 , Figure 10 and Figure 11 As shown, the boundaries of the S-region, which are pre-marked on the windshield, and obstacles inside the vehicle are projected onto the projection plate 12 of the projection device 1. The boundaries of the S-region are the boundaries defined by the aforementioned forward field of view S-region. After being pre-marked, they are projected similarly to obstacles inside the vehicle.

[0042] Then, the outlines of region S and the obstacles within region S are drawn on projection board 12 to obtain the area of ​​region S and the projected area of ​​the obstacles within region S, and the percentage of the obstacle projection within region S is calculated. The area of ​​region S can be calculated using its length L and width W. In practice, given that the projected image is clearly visible and what you see is what you get, the outline can be drawn with a marker, and then a photo can be taken directly. Photoshop can then be used to automatically calculate the percentage from the photo, which is simple and efficient. No additional processing device or calculation software is required.

[0043] In summary, the forward field of view S-area detection system of this application includes a projection device 1 and a light-emitting device 2. The projection device 1 includes a main frame 11 and a moving device. A projection plate 12 is provided on the main frame 11. The moving device is provided on the main frame 11, and a rangefinder 13 is fixed on the moving device. The moving device can move along the main frame 11 to adjust the lateral and vertical positions of the rangefinder 13 relative to the target vehicle 3. The light-emitting device 2 is used to be set on a three-dimensional H-point device 5 located inside the target vehicle 3. The light-emitting device 2 includes an adjustment mechanism and a light source 21 provided on the adjustment mechanism. The adjustment mechanism can adjust the lateral, longitudinal, and vertical positions of the light source 21 relative to the target vehicle 3.

[0044] This application solves the technical problems of long coordinate measurement and photography, complex and error-prone S-area projection device attitude adjustment, and cumbersome area calculation in traditional real vehicle inspection by directly projecting the boundary and obstacles of the S-area onto the projection board and measuring their length and width to quickly calculate the area. It significantly improves the inspection efficiency, simplifies the calibration process, and ensures ease of operation and measurement accuracy, making the obstacle detection process in the driver's field of vision faster and more reliable.

[0045] Secondly, embodiments of this application provide a method for detecting the forward field of view S region.

[0046] In one embodiment, reference is made to Figure 12 , Figure 12 This is a schematic flowchart of an embodiment of the forward field-of-view S-region detection method of this application. Figure 12 As shown, the forward field of view S region detection method includes: S1. Mark the measurement point on the target vehicle 3, measure the distance to the measurement point using the rangefinder 13, and adjust the position of the projection device 1 so that the projection device 1 is perpendicular to the target vehicle 3. S2. Adjust the lateral, longitudinal, and vertical positions of the light source 21 relative to the target vehicle 3 through the adjustment mechanism so that the light emission point of the light source 21 coincides with point V2; S3. Light up the light source 21 and project the obstacle and the boundary of the S area marked on the windshield onto the projection plate 12; S4. Determine the proportion of obstacles in the forward field of view S region based on the ratio of the projected area of ​​the obstacles on the projection plate 12 to that of the S region.

[0047] Further, in one embodiment, the mobile device includes: Two lateral sliders 14 are both mounted on the main body frame 11. The lateral sliders 14 can slide along the main body frame 11 to adjust their lateral position relative to the target vehicle 3. Two longitudinal sliders 15 are provided, each of which is mounted on a transverse slider 14. Each longitudinal slider 15 is equipped with a rangefinder 13, and the longitudinal slider 15 can slide along the transverse slider 14 to adjust its vertical position relative to the target vehicle 3. The step of marking measurement points on the target vehicle 3, measuring the distance to the measurement points using the rangefinder 13, and adjusting the position of the projection device 1 so that the projection device 1 is perpendicular to the target vehicle 3 includes: The measurement points are symmetrically calibrated at the two rearview mirrors 31 of the target vehicle 3; Adjust the two horizontal sliders 14 and the two vertical sliders 15, and adjust the position of the projection device 1 so that the two rangefinders 13 are aligned with the position of the measurement point and the measured distances are equal.

[0048] Furthermore, in one embodiment, the slide 24 is also provided with a positioning device 26, and the positioning device 26 is provided with a mark for assisting the positioning of the light source 21; The step of adjusting the lateral, longitudinal, and vertical positions of the light source 21 relative to the target vehicle 3 through the adjustment mechanism, so that the light emission point of the light source 21 coincides with point V2, includes: Based on the relative positional relationship between the mark on the positioning device 26 and the light source 21, the adjustment mechanism adjusts the lateral, longitudinal, and vertical positions of the mark on the positioning device 26 relative to the target vehicle 3, so that the mark on the positioning device 26 reaches the target position, thereby making the light-emitting point of the light source 21 coincide with point V2.

[0049] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0050] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 limitations, 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 said element.

[0051] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A forward field-of-view S-region detection system, characterized in that, The forward field of view S-region detection system includes: Projection device (1), comprising: The main frame (11) has a projection panel (12) mounted on it. A mobile device is mounted on the main frame (11), and a rangefinder (13) is fixed on the mobile device. The mobile device can move along the main frame (11) to adjust the lateral and vertical position of the rangefinder (13) relative to the target vehicle. A light-emitting device (2) is used to be installed on a three-dimensional H-point device located inside the target vehicle. The light-emitting device (2) includes an adjustment mechanism and a light source (21) installed on the adjustment mechanism. The adjustment mechanism can adjust the lateral, longitudinal and vertical positions of the light source (21) relative to the target vehicle.

2. The forward field of view S-region detection system as described in claim 1, characterized in that, The adjustment mechanism includes: The bracket body (22) is used to be mounted on the head space detection rod of the three-dimensional H-point device, and can move along the head space detection rod and be fixed on the head space detection rod; Adjustable platform, which includes: A fixing seat (23) is connected to the bracket body (22); A slide (24) that carries the light source (21) is movable relative to the fixed base (23) to adjust the lateral and longitudinal position of the light source (21) relative to the target vehicle.

3. The forward field of view S-region detection system as described in claim 2, characterized in that, The adjustable platform also includes: The universal joint (25) is connected at one end to the bracket body (22) and at the other end to the fixed seat (23).

4. The forward field of view S-region detection system as described in claim 3, characterized in that: A level is also provided on the fixed base (23).

5. The forward field of view S-region detection system as described in claim 2, characterized in that: The slide (24) is also provided with a positioning device (26), and the positioning device (26) is provided with a mark for assisting the positioning of the light source (21).

6. The forward field of view S-region detection system as described in claim 5, characterized in that: The light source (21) includes a light-transmitting cover, which contains a point light source and a baffle for focusing light. The side of the light-transmitting cover near the positioning device (26) is coated, while the side away from the positioning device (26) is transparent.

7. The forward field of view S-region detection system as described in claim 1, characterized in that, The mobile device includes: Two lateral sliders (14) are both set on the main body frame (11). The lateral sliders (14) can slide along the main body frame (11) to adjust their lateral position relative to the target vehicle. Two longitudinal sliders (15) are provided, each of which is mounted on a transverse slider (14). Each longitudinal slider (15) is equipped with a rangefinder (13), and the longitudinal slider (15) can slide along the transverse slider (14) to adjust its vertical position relative to the target vehicle.

8. A method for detecting the forward field of view (S-region) using the forward field of view (S-region) detection system as described in claim 1, characterized in that, The forward field of view S region detection method includes: Mark the measurement point on the target vehicle, measure the distance to the measurement point using the rangefinder (13), and adjust the position of the projection device (1) so that the projection device (1) is perpendicular to the target vehicle; The adjustment mechanism adjusts the lateral, longitudinal and vertical positions of the light source (21) relative to the target vehicle so that the light emission point of the light source (21) coincides with point V2. The light source (21) is turned on, and the obstacles and the boundary of the S area marked on the windshield are projected onto the projection panel (12); The proportion of obstacles in the forward field of view S region is determined based on the ratio of the projected area of ​​the obstacles on the projection plate (12) to the projected area of ​​region S.

9. The forward field of view S region detection method as described in claim 8, characterized in that, The mobile device includes: Two lateral sliders (14) are both set on the main body frame (11). The lateral sliders (14) can slide along the main body frame (11) to adjust their lateral position relative to the target vehicle. Two longitudinal sliders (15), each of the longitudinal sliders (15) is set on a transverse slider (14), each of the longitudinal sliders (15) is provided with a rangefinder (13), and the longitudinal sliders (15) can slide along the transverse slider (14) to adjust their vertical position relative to the target vehicle; The step of marking measurement points on the target vehicle, measuring the distance to the measurement points using the rangefinder (13), and adjusting the position of the projection device (1) so that the projection device (1) is perpendicular to the target vehicle includes: The measurement points were symmetrically calibrated at the two rearview mirrors of the target vehicle. Adjust the two horizontal sliders (14) and the two vertical sliders (15), and adjust the position of the projection device (1) so that the two rangefinders (13) are aligned with the position of the measurement point and the measured distances are equal.

10. The forward field of view S region detection method as described in claim 8, characterized in that: The slide (24) is also provided with a positioning device (26), and the positioning device (26) is provided with a mark for assisting the positioning of the light source (21); The step of adjusting the lateral, longitudinal, and vertical positions of the light source (21) relative to the target vehicle through the adjustment mechanism, so that the light emission point of the light source (21) coincides with point V2, includes: Based on the relative positional relationship between the mark on the positioning device (26) and the light source (21), the adjustment mechanism adjusts the lateral, longitudinal and vertical positions of the mark on the positioning device (26) relative to the target vehicle, so that the mark on the positioning device (26) reaches the target position, thereby making the light source (21) coincide with point V2.

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