Road surface brightness coefficient measuring device adopting high-power light source

Abstract

The utility model discloses a road surface brightness coefficient measuring device adopting a high-power light source. The road surface brightness coefficient measuring device comprises a shading shell, a high-power lighting device, two cameras and a computer, the shading shell comprises a 1 / 4 spherical panel with the sphere center being a point O, and the inner face of the shading shell is a light receiving screen which is formed by a matte white coating and conforms to Lambert cosine reflection characteristics. The light receiving screen is divided into a plurality of areas by the shading plates which are arranged in a latticed manner; the high-power lighting device comprises a shell, a high-power LED lamp and a light source light emitting pipeline, a concave curved surface reflector, an illuminometer and a concave lens are arranged in the shell, a downward 1-degree included angle is formed between the light emitting direction of the light source light emitting pipeline and the horizontal plane, and the light emitting direction passes through a point O; the concave lens is perpendicular to the light emitting direction. Diaphragm groups are sequentially arranged in the light source light emitting pipeline along the light emitting direction; and the two cameras transmit the shot images on the light receiving screen to the computer. The device is used for rapidly and accurately measuring the brightness coefficient of any point on the road surface.

Description

Technical Field

[0001] The utility model relates to an automatic measuring device, in particular to a measuring device for road surface brightness coefficient. Background Art

[0002] The brightness of the road surface plays an important role in the visual function and visual comfort of the driver. Its magnitude is determined by the intensity of light emitted by the lamp to the road surface and the reflective characteristics of the road surface. Usually, the reflection of the road surface shows significant anisotropy, and its reflective characteristics depend on the paved materials, the degree of wetness of the road surface, etc. Due to differences in pavement materials and processes, traffic volume, length of time vehicles or pedestrians use, and the use and aging of different color pigments, the road surface brightness reflection characteristics and monochromatic reflection conditions are also different, making the evaluation of road lighting and brightness performance extremely complex and changeable. Before lighting design, construction and maintenance of roads, tunnels, squares, etc., the actual light reflection conditions of the road surface or ground should be tested.

[0003] At present, there are two structures of test devices commonly used for measuring the road brightness coefficient: 1) A single lamp that meets the beam width requirements is installed on an arc-shaped cantilever structure, and the transmission mechanism rotates the lamp around the horizontal axis and the vertical axis to the required 396 angle positions in turn, turns on the lamp, measures the road brightness and illumination, and further obtains the brightness coefficient until all angle positions are measured; 2) A white light source is installed at each of the 377 angles to be measured, and is turned on in turn until all angles are measured. Since the light source needs to be switched on and off at each position or angle, the brightness measurement is limited by the stable measurement response time of the light source, and the light emission is unstable or inconsistent; the transmission mechanism has a complex structure, high requirements for rotation control and positioning accuracy, and is heavy, resulting in a long measurement time. The road traffic is blocked for a long time during measurement, and it is difficult to meet the needs of rapid on-site measurement of the road surface. Utility Model Content

[0004] In view of the above-mentioned prior art, the utility model proposes a novel road surface brightness coefficient measurement application device, which is used to quickly and accurately measure the brightness coefficient at any point on the road surface, and then quickly obtain a brightness coefficient table of the measured road surface.

[0005] In order to solve the above technical problems, the utility model proposes a road surface brightness coefficient measuring device using a high-power light source, including a light-shielding shell, a high-power lighting device, two cameras and a computer; the light-shielding shell includes a wall panel and a connecting bottom plate; the wall panel is formed by a 1 / 4 spherical panel S1, a semi-cylindrical arc plate S2 and a semi-circular flat plate S3 connected in sequence, the center of the 1 / 4 spherical panel S1 is point O, and the radius of the semi-cylindrical arc plate S2 and the radius of the semi-circular flat plate S3 are the same as the radius of the 1 / 4 spherical panel S1; the connecting The bottom plate includes an arc-shaped flat plate connected to the bottom and a rectangular plate arranged between the two ends of the bottom of the semi-cylindrical arc-shaped plate S2; in the inner surface of the wall plate, the area of ​​the 1 / 4 spherical panel S1 is a light-receiving screen composed of a matte white coating, and the remaining area is provided with a matte black coating; the light-receiving screen conforms to the Lambert cosine reflection characteristics, and the reflection characteristics are isotropic; the light-receiving screen is provided with a grid-shaped shielding plate protruding from the surface of the light-receiving screen by h; the high-power lighting device includes a shell, a high-power LED lamp and a light source light outlet pipe, the shell The housing comprises a first supporting housing arranged in a vertical direction and a second supporting housing arranged in a horizontal direction. The high-power LED lamp is arranged at the top of the first supporting housing. The bottom of the first supporting housing is connected with one end of the second supporting housing to form a curved space. The other end of the second supporting housing is connected with one end of the light emitting pipe of the light source. The other end of the light emitting pipe of the light source penetrates into the interior of the light shading housing. A concave curved reflector is arranged at the outer corner of the curved space, and an illuminometer is arranged at the inner corner of the curved space. The second supporting housing is provided with a concave lens on one side of the light emitting pipe of the light source. The light emitting direction of the light emitting pipe of the light source is at an angle of 1° downward with the horizontal plane, and the light emitting direction passes through point O. The concave lens is perpendicular to the light emitting direction. The light emitting pipe of the light source is provided with a first light bar and a second light bar in sequence along the light emitting direction. The two cameras are arranged in the light shading housing and on the rectangular plate. The two cameras are used to shoot images on the light receiving screen and transmit them to the computer.

[0006] Furthermore, the road surface brightness coefficient measuring device using a high-power light source described in the utility model, wherein:

[0007] The 1 / 4 spherical panel S1 is obtained by being located at the upper part of the sphere and intercepted by a horizontal plane and a vertical plane respectively passing through the center of the sphere.

[0008] The inner cavity of the first supporting shell is a cylindrical cavity, and the inner cavity of the second supporting shell is a truncated cone cavity, whose cross section gradually decreases from the curved space to one side of the light emitting pipe of the light source.

[0009] The grid-shaped shading plate divides the light receiving screen into several areas centered at point (β, tanγ), the vertex of the 1 / 4 spherical panel S1 is recorded as the positioning point A, the center point of each area is recorded as the positioning point B, the connecting line from point O to the positioning point B is recorded as the straight line L, the plumb plane where the straight line L is located is recorded as the light incident surface P, and the plumb plane where the 1 / 4 spherical panel S1 and the semi-cylindrical arc plate S2 are connected is recorded as the observation surface P 0 , the β is the observation plane P 0 When the angle β with the light incident surface P is 0° or 180°, the light incident surface P and the observation surface P 0 Overlap; the γ is the angle between the straight line L corresponding to the positioning point B and the plumb line passing through the positioning point B.

[0010] The values ​​of β and tanγ are determined according to Appendix A "Road Surface Brightness Coefficient and Simplified Brightness Coefficient Table" in "Urban Road Lighting Design Standard" CJJ45-2015.

[0011] The grid-shaped shading plates divide the light-receiving screen into several areas with the point (β, tanγ) as the center: 20 light incident surfaces P are made through point O, and β is 0°, 2°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, 165° and 180° respectively; each light incident surface P has an intersection line with the light-receiving screen, and the number of positioning points B determined from point A downward on each intersection line and the corresponding tanγ value are as follows:

[0012] a) When the β angle is 0°, 2°, 5°, 10° and 15° respectively, 29 positioning points B are determined on the corresponding 5 intersection lines from point A downwards;

[0013] b) When the angle β is 20°, 27 positioning points B are determined on the intersection line from point A downward;

[0014] c) When the angle β is 25°, 22 positioning points B are determined on the intersection line from point A downward;

[0015] d) When the angle β is 30°, 19 positioning points B are determined on the intersection line from point A downward;

[0016] e) When the angle β is 35°, 17 positioning points B are determined from point A downward on the intersection line;

[0017] f) When the β angle is 40°, 16 positioning points B are determined on the intersection line from point A downward;

[0018] g) When the β angle is 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, 165° and 180°, 15 positioning points B are determined on the 10 intersection lines from point A downwards;

[0019] In the above situations a) to g), the tanγ value corresponding to each positioning point B is selected from the following 29 data in order from the number of positioning points B included in each situation: 0, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12.

[0020] The light-receiving screen is divided into two parts by the light incident surface P when the β angle is 90°, and the value of h and the determination of the placement positions of the two cameras simultaneously satisfy: the shading plate can block the mutual influence of scattered light between adjacent areas on the light-receiving screen; and the two cameras do not block each other when shooting images on each 1 / 2 of the light-receiving screen.

[0021] The computer is installed with control and processing software for controlling the opening or closing of the high-power LED light source and starting two cameras for shooting, and extracting image data of all areas on the light-receiving screen, and obtaining brightness data of each area after processing; and respectively calculating the standard white light brightness coefficient and monochromatic light brightness coefficient corresponding to each area.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] The utility model relates to a road surface brightness coefficient measuring device, which utilizes a computer control program and a matching light source to control the switch of a standard light source, and uses a camera to record a high dynamic range image (HDR) on a light-receiving screen. The standard light source used in the test has a fast response speed and stable light emission, simplifies the measurement steps, simplifies the measurement device, reduces the measurement time, reduces the influence of external interference on the measurement result, and improves the measurement accuracy of the road surface brightness coefficient. At the same time, not only the reflection coefficient of white light but also the reflection coefficient of RGB monochromatic light can be calculated, and has the characteristics of light weight, simple structure, convenient adjustment, and little influence on traffic during measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the appearance of the road surface brightness coefficient measuring device of the utility model;

[0025] Figure 2 yes Figure 1 The schematic diagram of the internal structure of the road surface brightness coefficient measuring device shown;

[0026] Figure 3yes Figure 1 Schematic diagram of the internal structure of the high-power lighting device shown in.

[0027] In the figure:

[0028] 1- High-power lighting device 2- Light-shielding housing 3- Light-receiving screen 4- Light-shielding plate

[0029] 5-first camera 6-second camera 7-high-power LED lamp 8-concave reflector 9-concave lens 10-first light barrier 11-second light barrier 12-illuminance meter

[0030] 13-first supporting shell 14-second supporting shell 15-light source light outlet pipe DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0032] The utility model provides a road surface brightness coefficient measuring device using a high-power light source, comprising a high-power lighting device 1, a light shielding shell 2, a light shielding plate 4, two cameras (5 and 6) and a computer.

[0033] The light-shielding shell 2 is used to isolate the natural light outside the device during the day or other lights at night to avoid affecting the measurement of the brightness coefficient inside the light-shielding shell 2. It is made of opaque material, and the inner surface is coated with a matte black coating. The light-shielding shell 2 includes a wall panel and a connecting bottom plate; the wall panel is formed by a 1 / 4 spherical panel S1, a semi-cylindrical arc plate S2 and a semi-circular flat plate S3 connected in sequence. The center of the 1 / 4 spherical panel S1 is point O, and the 1 / 4 spherical panel S1 is obtained by intercepting a horizontal plane and a plumb plane located at the upper part of the sphere and passing through the center of the sphere respectively. The radius of the semi-cylindrical arc plate S2 and the radius of the semi-circular flat plate S3 are the same as the radius of the 1 / 4 spherical panel S1; the connecting bottom plate includes an arc-shaped flat plate connected to the bottom and a rectangular plate arranged between the two ends of the bottom of the semi-cylindrical arc plate S2, such as Figure 1 As shown. In the inner surface of the wall panel, the area of ​​the 1 / 4 spherical panel S1 is a light receiving screen 3 composed of a matte white coating; the light receiving screen 3 conforms to the Lambert cosine reflection characteristics, and the reflection characteristics are isotropic; the light receiving screen 3 is provided with the light shielding plate 4 protruding from the surface of the light receiving screen 3 by a grid layout of h, as shown Figure 2 shown.

[0034] like Figure 3As shown, the high-power lighting device 1 includes a high-power LED lamp 7, a shell, a concave curved reflector 8, an illuminometer 12, a concave lens 9, a light source light outlet pipe 15 and two light bars (10 and 11). The shell is arranged outside the light-shielding shell 2, and the shell includes a first support shell 13 arranged in a vertical direction and a second support shell 14 arranged in a horizontal direction. The inner cavity of the first support shell 13 is a cylindrical cavity, and the inner cavity of the second support shell 14 is a truncated cone cavity. The high-power LED lamp 7 is arranged at the top of the first support shell 13. The bottom end of the first support shell 13 is connected with one end of the second support shell 14 to form a curved space. The other end of the second support shell 14 is connected to one end of the light source light outlet pipe 15. The second support shell The cross section 14 gradually decreases from the curved space to the side of the light source light outlet pipe 15, and the other end of the light source light outlet pipe 15 penetrates into the interior of the light-shielding shell 2; the concave curved reflector 8 is arranged at the outer corner of the curved space, and the illuminometer 12 is arranged at the inner corner of the curved space and corresponds to the pipeline position of the concave curved reflector 8; the concave lens 9 is arranged in the second supporting shell 14 on one side of the light source light outlet pipe 15; the light emitting direction of the light source light outlet pipe 15 is at a downward angle of 1° with the horizontal plane, and the light emitting direction passes through point O, such as Figure 2 The concave lens 9 is perpendicular to the light emitting direction, and the light source light emitting pipe 15 is provided with a first light barrier 10 and a second light barrier 11 in sequence along the light emitting direction, as shown in FIG. Figure 3 The two cameras are both arranged in the light shielding housing 2 and located on the rectangular plate. The two cameras are used to capture the image on the light receiving screen 3 and transmit it to the computer. Figure 2 shown.

[0035] like Figure 2 As shown, the grid-shaped shading plate 4 divides the light receiving screen 3 into several areas centered at the point (β, tanγ). In the present invention, the vertex of the 1 / 4 spherical panel S1 is recorded as the positioning point A, the center point of each area is recorded as the positioning point B, the connecting line from point O to the positioning point B is recorded as the straight line L, the plumb plane where the straight line L is located is recorded as the light incident surface P, and the plumb plane where the 1 / 4 spherical panel S1 and the semi-cylindrical arc plate S2 are connected is recorded as the observation surface P 0 , the β is the observation plane P 0 When the angle β with the light incident surface P is 0° or 180°, the light incident surface P and the observation surface P 0 The γ is the angle between the straight line L corresponding to the positioning point B and the plumb line passing through the positioning point B. The values ​​of β and tanγ are determined according to Appendix A "Road Surface Brightness Coefficient and Simplified Brightness Coefficient Table" in "Urban Road Lighting Design Standard" CJJ45-2015.

[0036] In this embodiment, the grid-shaped shading plate 4 divides the light receiving screen 3 into several areas with the point (β, tanγ) as the center: 20 light incident surfaces P are made through point O, and β is 0°, 2°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, 165° and 180° respectively; each light incident surface P has a cut line with the light receiving screen 3, and there are 20 cut lines in total. The number of positioning points B determined from point A on each cut line and the corresponding tanγ value are as follows:

[0037] a) When the β angle is 0°, 2°, 5°, 10° and 15° respectively, 29 positioning points B are determined on the corresponding 5 intersection lines from point A downwards;

[0038] b) When the angle β is 20°, 27 positioning points B are determined on the intersection line from point A downward;

[0039] c) When the angle β is 25°, 22 positioning points B are determined on the intersection line from point A downward;

[0040] d) When the angle β is 30°, 19 positioning points B are determined on the intersection line from point A downward;

[0041] e) When the angle β is 35°, 17 positioning points B are determined from point A downward on the intersection line;

[0042] f) When the β angle is 40°, 16 positioning points B are determined on the intersection line from point A downward;

[0043] g) When the β angle is 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, 165° and 180°, 15 positioning points B are determined on the 10 intersection lines from point A downwards;

[0044] In the above cases a) to g), the tanγ value corresponding to each positioning point B is selected from the 29 data shown in Table 1 according to the number of positioning points B included in each intersection line in each case and the sequence of the positioning points B from top to bottom, as shown in Table 2. Thus, the grid-shaped light shielding plate divides the inner surface of the 1 / 4 spherical panel S1 (that is, the range of the light receiving screen 3) into 377 areas centered on the point (β, tanγ).

[0045] Table 1

[0046]

[0047]

[0048] Table 2

[0049] β angle (°) Number of anchor points B a) 0, 2, 5, 10 and 15; 29 b) 20； 27 c) 25； 22 d) 30； 19 e) 35； 17 f) 40； 16 g) 45, 60, 75, 90, 105, 120, 135, 150, 165 and 180; 15

[0050] In this embodiment, the high-power LED lamp 7 can emit three monochromatic lights of red, green and blue and white light. The shell is composed of a cylindrical first supporting shell 13 and an approximately conical first supporting shell 14. The shell is made of opaque material and its inner surface is painted black. The axis of the first supporting shell 13 is perpendicular to the ground. The high-power LED lamp 7 is placed on the top of the cylindrical first supporting shell 13 of the shell, and the axis of the light beam emitted by it coincides with the axis of the first supporting shell 13. The two ends of the approximately conical second supporting shell 14 are respectively connected to the second supporting shell 13 and the light source light outlet pipe 15; the axis direction of the light source light outlet pipe 15 is in a plane with a β angle of 180°, and the angle between the axis and the horizontal plane is (downward) 1°. The light source light outlet pipe 15 is also made of opaque material and its inner surface is painted black; the concave curved reflector 8 is placed on the outside of the corner where the second supporting shell 13 and the second supporting shell 14 intersect, such as Figure 3As shown, it is used to reflect the horizontal light projected by the high-power LED lamp 7 and make the light converge to the concave lens 9; the concave lens 9 is placed in a second support shell 14 that is approximately conical, with an angle of 89° with the horizontal plane (and perpendicular to the axis of the light source light outlet pipe 15), and the light converged by the concave curved reflector 8 is horizontally emitted, and the range of the emitted light beam is less than 1°; the light bar group composed of the first light bar 10 and the second light bar 11 is placed in the light source light outlet pipe 15, and both form an angle of 89° with the horizontal plane (and perpendicular to the axis of the light source light outlet pipe 15). vertical), both light bars have through holes coaxial with the axis of the light source; the illuminometer 12 is placed inside the corner where the second support shell 13 and the second support shell 14 intersect, and in the groove facing the concave reflector 8, the illuminometer 12 is used to measure the illuminance reflected by the concave reflector 8 onto the illuminometer 12, the illuminance value projected to point O by the high-power lighting device 1 is proportional to the illuminance value scattered by the concave reflector 8 onto the illuminometer 12, and the illuminance value projected to point O can be obtained by obtaining the illuminance value scattered onto the illuminometer 12. When arranging the device of the utility model, the high-power lighting device 1 is arranged at the bottom edge of the outside of the 1 / 4 spherical panel S1 and at a position where the angle β is 180°; the axis of the light beam emitted by the high-power lighting device 1 passes through point O, and the angle between the axis of the light beam and the horizontal plane is (downward) 1°. The light beam emitted by the high-power LED lamp 7 as a light source is a narrow light beam with an angle less than 1° and a luminous intensity of I; the opening and closing of the high-power lighting device 1 is controlled by a computer. During measurement, the device is placed on the road surface to be measured, and the center point O of the 1 / 4 spherical light receiving screen 3 is the measuring point. The high-power lighting device 1 is turned on, and the light beam is projected at point O and reflected onto the light receiving screen 3.

[0051] In this embodiment, the light receiving screen 3 is divided into two parts by the light incident surface P when the angle β is 90°, and the h value and the determination of the placement positions of the two cameras simultaneously meet the following conditions: the light shielding plate 4 can block the mutual influence of scattered light between adjacent areas on the light receiving screen 3; the two cameras do not block each other when taking images on each 1 / 2 of the light receiving screen 3. The two cameras are used to take images of the inner surface of the light receiving screen 3, and the taken pictures include all points on the inner surface of the light receiving screen 3. The images of the inner surface of the light receiving screen 3 taken by the cameras are high dynamic images (HDR images).

[0052] The computer is installed with control and processing software, which is used to control the opening or closing of the high-power LED light source 7 and start two cameras for shooting. The high-power LED lamp 7 is turned on once for each measurement. After the lighting is stable, the two cameras are started to shoot images of all areas on the inner surface of the light-receiving screen 3. After shooting, the images taken by the cameras are transmitted to the computer; the control and processing software processes the image, extracts the image data of the 377 areas in turn, and obtains the brightness data of each area after processing; and calculates the standard white light brightness coefficient and the monochromatic light brightness coefficient corresponding to each area respectively. After sorting the data, the brightness coefficient table of the standard white light and the brightness coefficient table of the RGB monochromatic light are obtained. For the above-mentioned control and processing software, ordinary technicians in this field can complete programming according to the functions realized. The programming content belongs to the conventional technical means in this technical field and will not be repeated here.

[0053] The working process of the road surface brightness coefficient measuring device of the utility model is as follows:

[0054] 1) Place the road surface brightness coefficient measuring device of the utility model on the road surface to be measured, align the O point position with the point to be measured on the road surface, and place the 0° direction of the β angle along the driving direction, and turn on the power switch and computer switch;

[0055] 2) Turn on the high-power LED lamp 7 through computer control and processing program. After the lighting is stable, start the two cameras 5 and 6 through the computer control program to shoot the brightness distribution on the light-receiving screen 2.

[0056] 3) The photographed photos are transferred to a computer, and the images are further processed by the computer control and processing software, and the image data of 377 areas on the light-receiving screen 3 are extracted in sequence to obtain the brightness data of each area.

[0057] 4) According to the brightness data obtained from each area, the brightness coefficient of the standard white light and the brightness coefficient of the monochromatic light corresponding to each area are calculated respectively, thereby forming a standard white light brightness coefficient table and a RGB monochromatic light brightness coefficient table.

[0058] Although the utility model has been described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the utility model, ordinary technicians in this field can make many modifications without departing from the purpose of the utility model, all of which are within the protection of the utility model.

Claims

1. A road surface brightness coefficient measuring device using a high-power light source, comprising a light-shielding housing (2), a high-power lighting device (1), two cameras and a computer, characterized in that: The light shielding housing (2) comprises a wall panel and a connecting bottom plate; the wall panel is formed by sequentially connecting and enclosing a quarter spherical panel S1, a semi-cylindrical arc-shaped panel S2 and a semi-circular flat plate S3, the center of the quarter spherical panel S1 is point O, and the radius of the semi-cylindrical arc-shaped panel S2 and the radius of the semi-circular flat plate S3 are both the same as the radius of the quarter spherical panel S1; the connecting bottom plate comprises an arc-shaped flat plate connected to the bottom and a rectangular plate arranged between the two ends of the bottom of the semi-cylindrical arc-shaped panel S2; In the inner surface of the wall panel, the area of ​​the 1 / 4 spherical panel S1 is a light receiving screen (3) composed of a matte white coating, and the remaining area is provided with a matte black coating; the light receiving screen (3) conforms to the Lambert cosine reflection characteristics, and the reflection characteristics are isotropic; the light receiving screen (3) is provided with a grid-shaped shielding plate (4) protruding from the surface of the light receiving screen (3) by a length h; The high-power lighting device (1) comprises a shell, a high-power LED lamp (7) and a light source light outlet pipe (15); the shell is arranged outside the light-shielding shell (2); the shell comprises a first supporting shell (13) arranged in a vertical direction and a second supporting shell (14) arranged in a horizontal direction; the high-power LED lamp (7) is arranged at the top of the first supporting shell (13); the bottom end of the first supporting shell (13) and one end of the second supporting shell (14) are connected to form a curved space; the other end of the second supporting shell (14) is connected to one end of the light source light outlet pipe (15); the light source The other end of the light outlet pipe (15) penetrates into the interior of the light shielding shell (2); a concave curved reflector (8) is provided at the outer corner of the curved space, and an illuminance meter (12) is provided at the inner corner of the curved space; the second supporting shell (14) is provided with a concave lens (9) on one side of the light outlet pipe (15) of the light source, the light outlet direction of the light outlet pipe (15) of the light source forms a downward angle of 1° with the horizontal plane, and the light outlet direction passes through point O; the concave lens (9) is perpendicular to the light outlet direction; a first light barrier (10) and a second light barrier (11) are provided in sequence in the light outlet pipe (15) of the light source along the light outlet direction; The two cameras are both arranged in the light-shielding housing (2) and located on the rectangular plate, and the two cameras are used to capture images on the light-receiving screen (3) and transmit the images to the computer; The grid-shaped shading plate (4) divides the light receiving screen (3) into a plurality of areas centered at the point (β, tanγ); the vertex of the 1 / 4 spherical panel S1 is recorded as the positioning point A, the center point of each area is recorded as the positioning point B, the connecting straight line from point O to the positioning point B is recorded as the straight line L, the plumb plane where the straight line L is located is recorded as the light incident surface P, the plumb plane where the 1 / 4 spherical panel S1 and the semi-cylindrical arc plate S2 are connected is recorded as the observation surface P0, β is the angle between the observation surface P0 and the light incident surface P, and when β is 0° or 180°, the light incident surface P coincides with the observation surface P0; γ is the angle between the straight line L corresponding to the positioning point B and the plumb line passing through the positioning point B; The light receiving screen (3) is divided into two parts by a light incident surface P when the angle β is 90°, and the h value and the determination of the placement positions of the two cameras are simultaneously satisfied: the shading plate (4) can block the mutual influence of scattered light between adjacent areas on the light receiving screen (3); and the two cameras do not block each other when shooting images on each 1 / 2 of the light receiving screen (3).

2. The road surface brightness coefficient measuring device using a high-power light source according to claim 1, characterized in that: The 1 / 4 spherical panel S1 is obtained by being located at the upper part of the sphere and intercepted by a horizontal plane and a vertical plane respectively passing through the center of the sphere.

3. The road surface brightness coefficient measuring device using a high-power light source according to claim 1, characterized in that: The inner cavity of the first supporting shell (13) is a cylindrical cavity, and the inner cavity of the second supporting shell (14) is a truncated cone cavity, the cross section of which gradually decreases from the curved space to the side of the light source light outlet pipe (15).

4. The road surface brightness coefficient measuring device using a high-power light source according to claim 1, characterized in that: The light shielding plates (4) arranged in a grid shape respectively divide the light receiving screen (3) into a plurality of areas with the point (β, tanγ) as the center: Through point O, 20 light incident surfaces P are made, with β being 0°, 2°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, 165° and 180° respectively; each light incident surface P has an intersection line with the light receiving screen (3), and the number of positioning points B determined on each intersection line from point A downward and the corresponding tanγ values ​​are as follows: a) When the β angle is 0°, 2°, 5°, 10° and 15° respectively, 29 positioning points B are determined on the corresponding 5 intersection lines from point A downwards; b) When the angle β is 20°, 27 positioning points B are determined on the intersection line from point A downward; c) When the angle β is 25°, 22 positioning points B are determined on the intersection line from point A downward; d) When the angle β is 30°, 19 positioning points B are determined on the intersection line from point A downward; e) When the β angle is 35°, 17 positioning points B are determined on the intersection line from point A downward; f) When the β angle is 40°, 16 positioning points B are determined on the intersection line from point A downward; g) When the β angle is 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, 165° and 180°, 15 positioning points B are determined on the 10 intersection lines from point A downwards; In the above cases a) to g), the tanγ value corresponding to each positioning point B is selected from the following 29 data in order from the front to the back according to the number of positioning points B included in each case: 0、0.25、0.5、0.75、1、1.25、1.5、1.75、2、2.5、3、3.5、4、4.5、5、5.5、6、6.5、7、7.5、8、8.5、9、9.5、10、10.5、11、11.5、12。

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