CN109342371B - Light path system of retroreflection coefficient testing device - Google Patents
Light path system of retroreflection coefficient testing device Download PDFInfo
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- CN109342371B CN109342371B CN201811174334.5A CN201811174334A CN109342371B CN 109342371 B CN109342371 B CN 109342371B CN 201811174334 A CN201811174334 A CN 201811174334A CN 109342371 B CN109342371 B CN 109342371B
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- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 230000007935 neutral effect Effects 0.000 claims abstract description 37
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims description 17
- 210000000078 claw Anatomy 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N2021/551—Retroreflectance
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- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The application provides an optical path system of a retroreflection coefficient testing device, which comprises: a frame; a reference photosensitive sensor is arranged on one side surface of the sample table; the light condensing cylinder is internally provided with a point light source, a first optical filter and a convex lens; the observation angle moving shaft is provided with a movable sliding seat; the photosensitive sensor is arranged on the sliding seat, and a motor is arranged at one side of the photosensitive sensor; the neutral filter device is connected to the rotating shaft of the motor and is provided with a plurality of neutral filter components; wherein, neutral filter assembly has: a lower cover; an upper cover; a special filter; at least three outer clamping pieces, wherein the outer clamping pieces are used for axially clamping the special optical filter in the mounting cavity; and the radial positioning assemblies are used for radially positioning and radially clamping the special optical filter in the mounting cavity, so that the special optical filter is stably and reliably mounted between the upper cover and the lower cover.
Description
Technical Field
The present invention relates to an optical path system of a retroreflection coefficient testing device, and more particularly, to an optical path system of a retroreflection coefficient testing device.
Background
The retroreflection is also called as retroreflection, and is a reflection that reflected light returns from a direction approaching to the opposite direction of incident light, and a reflective material with a retroreflection function comprises a reflective film, a reflector, a reflective marking line, reflective clothing and the like, so that the retroreflection material is widely applied to the fields of road traffic marks, marking lines, vehicle reflective marks, special operation clothes, fire fighting marks, railway marks, mining area marks and the like, plays a significant role in ensuring traffic safety and the like, but the existing retroreflection coefficient system for detecting the reflective marks is far behind actual demands, and has the defects of complex testing process, low detection precision and the like.
In summary, how to provide a retroreflection coefficient testing device with convenient testing and high testing precision is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an optical path system of a retroreflection coefficient testing device, which solves the problems of complex testing process and low detection precision of the existing testing device.
In order to solve the technical problems, the invention provides the following technical scheme: an optical path system of a retroreflection coefficient testing apparatus, comprising: a frame; the sample table is arranged on one side of the rack, a reference photosensitive sensor or a sample is arranged on one side surface of the sample table, and the reference photosensitive sensor is used for measuring the intensity of incident light; the light condensation cylinder is arranged on the other side of the frame, and a point light source, a first optical filter and a convex mirror are arranged in the light condensation cylinder; the observation angle moving shaft is provided with a movable sliding seat; the photosensitive sensor is arranged on the sliding seat, and a motor is arranged on one side of the photosensitive sensor; the neutral filter device is connected to the rotating shaft of the motor and is provided with a plurality of neutral filter components, and light beams reflected by the sample are transmitted to the photosensitive sensor through the neutral filter components; wherein the neutral filter assembly has: a lower cover; the upper cover is in threaded connection with the lower cover; a special filter which is arranged between the upper cover and the lower cover, wherein one end of the special filter is blocked on the inner bottom surface of the mounting cavity of the lower cover; the outer clamping pieces are used for axially clamping the special optical filter in the mounting cavity; and the radial positioning assemblies are used for radially positioning and radially clamping the special optical filter in the mounting cavity.
Further, the neutral density filter further has: the circular ring is connected to the rotating shaft of the motor; one end of each connecting rod is connected to the periphery of the circular ring through welding; the lower cover is connected to the other end of the corresponding connecting rod through welding, and a second round hole is formed in the bottom of the lower cover; the screw thread portion threaded connection of upper cover is in corresponding lower cover, first round hole has been seted up at the top of upper cover.
Still further, the neutral filter assembly further has at least three hook members for axially positioning the special filter and preventing the special filter from rotating about an axis of the special filter.
Still further, the outer fastener has first fixed plate portion, arc plate portion and the support slide plate portion that connects gradually, first fixed plate portion is followed in the lower cover passes the first perforation of lower cover is fixed in the first perforation, one side of arc plate portion supports and presses on the purpose-made light filter, the opposite side of arc plate portion supports and presses on the terminal surface of screw thread portion, support slide plate portion supports and prop on the inside wall of lower cover, support slide plate portion's free end along the axis of lower cover is to the interior bottom surface orientation extension of installation cavity.
Further, the free end of the supporting and sliding plate part is provided with a plugboard part, the plugboard part penetrates through the plughole of the first fixed plate part to extend to the inner bottom surface of the mounting cavity, and the plugboard part is in sliding fit with the plughole.
Further, the radial positioning assembly comprises: the front end of the limiting cylinder sequentially penetrates through the threaded hole and the second through hole on the side wall of the lower cover to extend into the lower cover; the top bead is movably arranged in the limiting cylinder, and the top of the top bead can extend out of the front end of the limiting cylinder and is propped against the peripheral wall of the special optical filter; the blocking piece is fixed in the threaded hole, and the blocking piece presses the bottom ring part of the limit cylinder against the bottom wall of the threaded hole; and the extrusion spring is arranged in the limiting cylinder and is positioned between the top bead and the plugging piece.
Still further, the spacing section of thick bamboo has a plurality of spacing claw, and a plurality of spacing claw interval sets up on the bottom ring portion, and a plurality of spacing claw passes the second perforation extends to the inside of lower cover, the front end of spacing claw has the inturned arc portion, and the aperture of the hole that a plurality of inturned arc portion encloses is less than the diameter of top pearl.
Still further, the hook piece has second fixed plate portion, bedplate portion, straight board portion and the curved board portion that connects gradually, second fixed plate portion from in the lower cover pass the third perforation on the bottom of lower cover and fixed connection is in on the third perforation, bedplate portion is embedded in the embedded groove of the interior bottom surface of installation cavity, straight board portion passes from one side of special light filter draw-in groove on the special light filter periphery to the opposite side of special light filter, just the part of straight board portion supports and presses on the bottom surface of draw-in groove, curved board portion is in the opposite side of special light filter is contradicted.
Furthermore, the clamping groove is provided with an arc guide surface, so that the arc plate part can pass through the clamping groove to be clamped on the other side of the special optical filter.
Further, the center points of the reference photosensor, the first optical filter, the convex mirror and the point light source are on the same horizontal line.
As can be seen from the technical scheme, the invention has the following beneficial effects:
The light path system of the retroreflection coefficient testing device provided by the invention can be used for measuring the retroreflection coefficient of the retroreflection material at a distance of more than 15 meters, can truly reflect the retroreflection condition of the retroreflection material in actual use, improves the existing relative measurement method, and improves the testing precision;
In the invention, the motor can control the neutral filter device to rotate so as to switch the special filters with different passing rates on the neutral filter device, thereby achieving the purpose of adjusting the light intensity entering the photosensitive sensor and greatly improving the measuring range;
In the invention, the photosensitive sensor can move up and down along the observation angle moving shaft, the observation angle is changed, and the retroreflection coefficient of the sample under different observation angles is measured;
In the invention, the special optical filter is reliably axially clamped in the mounting cavity by the outer clamping piece, the special optical filter is reliably radially positioned and radially clamped in the mounting cavity by the radial positioning assembly, the special optical filter is reliably axially positioned in the mounting cavity by the clamping hook piece, the special optical filter can be prevented from rotating around the axis of the special optical filter in the mounting cavity, and the special optical filter is firmly and reliably arranged between the upper cover and the lower cover under the combined action of the outer clamping piece, the radial positioning assembly and the clamping hook piece.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of a neutral filter according to the present invention.
Fig. 3 is a schematic view of the structure in the direction A-A in fig. 2.
Fig. 4 is an enlarged schematic view of the structure at D in fig. 3.
Fig. 5 is a schematic view of the structure in the B-B direction in fig. 2.
Fig. 6 is an enlarged schematic view of the structure at E in fig. 5.
Fig. 7 is a schematic structural diagram of the C-C direction in fig. 2.
Fig. 8 is an enlarged schematic view of the structure at F in fig. 7.
Fig. 9 is a schematic front view of the outer clip of the present invention.
Fig. 10 is a schematic left-view structure of the outer clip of the present invention.
Fig. 11 is a schematic structural view of a limiting cylinder according to the present invention.
Reference numerals illustrate: the device comprises a rack 1, a sample stage 2, a reference photosensitive sensor 3, a light collecting cylinder 4, a first light filter 5, a convex mirror 6, a point light source 7, a neutral filter device 8, a neutral filter component 8A, a circular ring 81, a connecting rod 82, an upper cover 83, a first round hole 831, a threaded portion 832, a lower cover 84, a second round hole 841, a first through hole 842, a second through hole 843, a threaded hole 844, a third through hole 845, an embedded groove 846, a mounting cavity 847, a special light filter 85, a clamping groove 851, an arc guide surface 852, an outer clamping piece 86, a first fixed plate portion 861, a jack 8611, a first bending portion 8612, an arc plate portion 862, a supporting plate portion 863, an inserting plate portion 8631, a radial positioning component 87, a limiting cylinder 871, a bottom ring portion 8711, a limiting claw portion 8712, an inner bending arc portion 87121, a top bead 872, a pressing spring 873, a blocking piece 874, a clamping hook 88, a second fixed plate portion 881, a second bending portion 8811, a straight plate portion 883, a motor bending portion 884, a motor bending portion 9, a photosensitive shaft sensor 10 and a sliding seat 11.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
The present invention will be further described with reference to fig. 1 to 11, wherein an optical path system of a retroreflection coefficient testing apparatus shown in fig. 1 includes: the light-sensitive device comprises a rack 1, a sample table 2, a light-gathering barrel 4, an observation angle moving shaft 11, a photosensitive sensor 10 and a neutral filter device 8, wherein the sample table 2 is arranged on one side of the rack 1, a reference photosensitive sensor 3 or a sample is arranged on one side surface of the sample table 2, the light-gathering barrel 4 is arranged on the other side of the rack 1, a point light source 7, a first optical filter 5 and a convex mirror 6 are arranged in the light-gathering barrel 4, the first optical filter 5 is arranged on one side of the light-gathering barrel 4 close to the reference photosensitive sensor 3, the convex mirror 6 is arranged between the point light source 7 and the first optical filter 5, the center points of the reference photosensitive sensor 3, the first optical filter 5, the convex mirror 6 and the point light source 7 are arranged on the same horizontal line, the point light source 7 is arranged on the focal point of the convex mirror 6, a light beam 7 is gathered on the convex mirror 6 through the light-gathering barrel 4, the convex mirror 6 can form parallel beams by the light-gathering barrel, the first optical filter 5 can enable the parallel beams to be distributed more uniformly, the observation angle moving shaft 11 is arranged above the light-gathering barrel 4, a photosensitive sensor 12 capable of moving up and down is arranged on the light-gathering barrel 11, a photosensitive sensor 10 is arranged on one side of the light-gathering barrel, a motor 10 is arranged on the light-gathering barrel 6, a motor 10 is arranged between the light-gathering barrel 6, a neutral sensor 10 is arranged on the light-gathering barrel 8, a neutral sensor 8 is arranged on the light-gathering seat, a neutral sensor 8 is arranged on the light-sensitive sensor 8, a neutral filter device is arranged on the light-sensitive device, a neutral filter device 9 is connected to the neutral filter device, a neutral filter device 9 is arranged on the light-sensitive device is arranged, a neutral filter device is arranged, a neutral light filter device is arranged, the light sensor is arranged on the light sensor 8, the light sensor is and has a light sensor 8, and has a light sensor device and has a light sensor device, and a light sensor device and has a device.
In this embodiment, as shown in fig. 1 and 2, the neutral filter device 8 further has a ring 81 and four connecting rods 82, the ring 81 is connected to the rotating shaft of the motor 9, the four connecting rods 82 are uniformly disposed on the periphery of the ring 81, one end of each connecting rod 82 is connected to the periphery of the ring 81 by welding, and four neutral filter components 8A are connected to the other end of the corresponding connecting rod 82 by welding, and in addition, the number of the neutral filter components 8A may be three or five.
In this embodiment, as shown in fig. 2, 3,5, and 7, the neutral filter assembly 8A includes: the lower cover 84, an upper cover 83, a specially-made optical filter 85, three outer clamping pieces 86, three radial positioning assemblies 87 and three clamping hook pieces 88, wherein the lower cover 84 is connected to the corresponding connecting rod 82 through welding, a second round hole 841 is formed in the bottom of the lower cover 84, the upper cover 83 is connected to the lower cover 84 through threads, a threaded portion 832 of the upper cover 83 is connected to the corresponding lower cover 84 through threads, a first round hole 831 is formed in the top of the upper cover 83, the specially-made optical filter 85 is detachably arranged between the upper cover 83 and the lower cover 84, one end of the specially-made optical filter 85 is blocked on the inner bottom surface of an installation cavity 847 of the lower cover 84, the first round hole 831 and the second round hole 841 can keep light beams to the specially-made optical filter 85, when the specially-made optical filter 85 needs to be removed, the upper cover 83 is firstly removed from the lower cover 84, and then the specially-made optical filter 85 is pushed from the second round hole 841 of the lower cover 84.
In this embodiment, as shown in fig. 2,3, 4, 9 and 10, the outer clip 86 has a first fixing plate portion 861, an arc plate portion 862 and a supporting and sliding plate portion 863 connected in this order, the first fixing plate portion 861 passes through a first through hole 842 of the lower cover 84 from inside the lower cover 84, a portion of the first fixing plate portion 861 extending out of the first through hole 842 is folded to abut against an outer wall of the lower cover 84 to form a first folded portion 8612, one end of the arc plate portion 862 is connected to the first fixing plate portion 861, the arc plate portion 862 is arched away from an inner wall surface of the lower cover 84, the supporting and sliding plate portion 863 is connected to the other end of the arc plate portion 862, the supporting and sliding plate portion 863 abuts against an inner wall of the lower cover 84, a free end of the supporting and sliding plate portion 863 extends along an axis of the lower cover 84 toward an inner bottom surface of the mounting cavity 847, the free end of the supporting and sliding plate portion 863 has a plugboard portion 8631 extending through the plughole 861 of the first fixing plate portion 861 toward the inner bottom surface of the mounting cavity 847, and the insert plate portion 8631 is in sliding fit with the insert hole 8611, when the special filter 85 is installed, the edge of the special filter 85 abuts against the arc plate portion 862, so that the arc plate portion 862 is deformed, the support slide plate portion 863 slides on the inner side wall of the lower cover 84 in the opening direction of the lower cover 84 until one end of the special filter 85 abuts against the inner bottom surface of the installation cavity 847 of the lower cover 84, then the upper cover 83 is installed, the threaded portion 832 of the upper cover 83 presses one side of the arc plate portion 862, so that the arc plate portion 862 is deformed, the support slide plate portion 863 slides on the inner side wall of the lower cover 84, the insert plate portion 8631 slides in the insert hole 8611 towards the inner bottom surface of the installation cavity 847, so that the other side of the deformed arc plate portion 862 tightly abuts against the special filter 85, the special filter 85 is reliably and axially clamped in the installation cavity 847, the three outer clamping pieces 86 are uniformly arranged at intervals along the circumferential direction of the lower cover 84, and the three outer clamping pieces 86 can be used for clamping the special optical filter more reliably under the combined action of the three outer clamping pieces 86, and in addition, the number of the outer clamping pieces 86 can be four or five.
In this embodiment, as shown in fig. 2, 5, 6 and 11, the radial positioning assembly 87 includes: the limiting cylinder 871, the top bead 872, the blocking piece 874 and the extrusion spring 873, the limiting cylinder 871 is provided with a bottom ring 8711 and a plurality of limiting claw 8712, the plurality of limiting claw 8712 is arranged on the bottom ring 8711 at intervals, the plurality of limiting claw 8712 extends to the inside of the lower cover 84 through a second perforation 843 on the side wall of the lower cover 84, the front end of the limiting claw 8712 is provided with an inward curved arc 87121, the top bead 872 is movably arranged in the limiting cylinder 871, the top of the top bead 872 can extend out of the front end of the limiting cylinder 871 and is pressed against the peripheral wall of the special filter 85, the aperture of a hole surrounded by the plurality of inward curved arc 87121 is smaller than the diameter of the top bead 872, the blocking piece 874 can be effectively prevented from falling from the front end of the limiting cylinder 871, the blocking piece 874 is fixed in the threaded hole 844, the blocking piece 874 presses the bottom ring 8711 of the limiting cylinder 871 against the bottom wall 844, the pressing spring 873 is disposed in the limiting cylinder 871 and is located between the top bead 872 and the blocking member 874, when the special filter 85 is installed, the edge of the special filter 85 will press the top bead 872, so that the top bead 872 is pressed into the limiting cylinder 871, the pressing spring 873 is compressed, when one end of the special filter 85 is pressed against the inner bottom surface of the installation cavity 847 of the lower cover 84, the deformed pressing spring 873 will press the top bead 872, so that the top of the top bead 872 is tightly pressed against the peripheral wall of the special filter 85, the three radial positioning assemblies 87 are uniformly spaced along the circumferential direction of the lower cover 84, and the three radial positioning assemblies 87 together radially position and radially clamp the special filter 85 in the installation cavity 847, in addition, the number of the radial positioning assemblies 87 can be four or five.
In this embodiment, as shown in fig. 2, 7 and 8, the hook member 88 has a second fixing plate portion 881, a seat plate portion 882, a straight plate portion 883 and an arc bent plate portion 884 connected in this order, the second fixing plate portion 881 passes through a third through hole 845 on the bottom of the lower cover 84 from inside the lower cover 84, a portion of the second fixing plate portion 881 extending out of the third through hole 845 is bent to abut against the outer wall of the lower cover 84 to form a second bent portion 8811, the seat plate portion 882 is embedded in the embedded groove 846 of the inner bottom surface of the mounting cavity 847, the straight plate portion 883 is disposed obliquely, and one end of the straight plate portion 883 connected to the arc bent plate portion 884 extends toward the center direction of the lower cover 84, one end of the arc bent plate portion 884 is connected to the straight plate portion 883, the other end of the arc bent plate portion 884 abuts against the straight plate portion 883, when the special filter 85 is installed, the straight plate 883 passes through the clamping groove 851 on the periphery of the special filter 85 from one side of the special filter 85 to the other side of the special filter 85, and part of the straight plate 883 is pressed against the bottom surface of the clamping groove 851, the arc bending plate 884 is pressed against the other side of the special filter 85, the clamping hook 88 axially positions the special filter 85 in the mounting cavity 847 and can prevent the special filter 85 from rotating around the axis of the special filter 85 in the mounting cavity 847, the three clamping hook 88 can enable the special filter 85 to be axially positioned in the mounting cavity 847 more reliably, in addition, the number of the clamping hook 88 can be four or five, and the clamping groove 851 is provided with an arc guiding surface 852 so that the arc bending plate 884 passes through the clamping groove 851 to be clamped on the other side of the special filter 85.
In this embodiment, as shown in fig. 1, the working principle is as follows: the light beam emitted by the point light source 7 forms approximately parallel light after passing through the convex mirror 6, the parallel light irradiates the reference photosensitive sensor 3 on the sample table 2 through the first optical filter 5, the reference photosensitive sensor 3 measures the intensity of incident light, the reference photosensitive sensor 3 is detached after the measurement of the incident light intensity is completed, a sample is placed on the position of the reference photosensitive sensor 3, the incident light irradiates the sample, the light beam reflected by the sample passes through the neutral filter components 8A with different attenuation rates on the neutral filter device 8 and then is transmitted to the photosensitive sensor 10, when the light intensity is reflected, the light entering the photosensitive sensor 10 can be made to be weakened by the special optical filter 85 with high switching attenuation rate, so that the measurement range and the measurement precision are improved, the photosensitive sensor 10 can move up and down along the observation angle moving shaft 11, the observation angle is changed, and the retroreflection coefficient of the sample under different observation angles is measured.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An optical path system of a retroreflection coefficient testing apparatus, comprising:
a frame (1);
the sample table (2), the sample table (2) is arranged on one side of the frame (1), a reference photosensitive sensor (3) or a sample is arranged on one side surface of the sample table (2), and the reference photosensitive sensor (3) is used for measuring the intensity of incident light;
The light condensation cylinder (4), the light condensation cylinder (4) is arranged on the other side of the frame (1), and a point light source (7), a first optical filter (5) and a convex mirror (6) are arranged in the light condensation cylinder (4);
An observation angle moving shaft (11), wherein a movable slide seat (12) is arranged on the observation angle moving shaft (11);
the photosensitive sensor (10) is arranged on the sliding seat (12), and a motor (9) is arranged on one side of the photosensitive sensor (10);
The neutral filter device (8) is connected to the rotating shaft of the motor (9), the neutral filter device (8) is provided with a plurality of neutral filter components (8A), and light beams reflected by a sample are transmitted to the photosensitive sensor (10) through the neutral filter components (8A);
Wherein the neutral filter assembly (8A) has:
A lower cover (84);
An upper cover (83), said upper cover (83) being threadably connected to said lower cover (84);
a special filter (85), the special filter (85) has a large attenuation rate, and is arranged between the upper cover (83) and the lower cover (84), one end of the special filter (85) is abutted against the inner bottom surface of the mounting cavity (847) of the lower cover (84);
At least three outer clips (86), the outer clips (86) being configured to axially clamp the custom filter (85) within the mounting cavity (847);
And at least three radial positioning assemblies (87), wherein the radial positioning assemblies (87) are used for radially positioning and radially clamping the special optical filter (85) in the mounting cavity (847).
2. The optical path system of the retroreflection coefficient testing device according to claim 1, characterized in that the neutral filter (8) further has:
a ring (81), the ring (81) being connected to the rotation shaft of the motor (9);
One end of each connecting rod (82) is connected to the periphery of the corresponding circular ring (81) through welding;
wherein, the lower cover (84) is connected with the other end of the corresponding connecting rod (82) through welding, and a second round hole (841) is formed at the bottom of the lower cover (84); the threaded part (832) of the upper cover (83) is in threaded connection with the corresponding lower cover (84), and a first round hole (831) is formed in the top of the upper cover (83).
3. The light path system of the retroreflection coefficient testing device according to claim 2, characterized in that the neutral filter assembly (8A) further has at least three hook pieces (88), the hook pieces (88) being used to axially position the special filter (85) and prevent the special filter (85) from rotating around the axis of the special filter (85).
4. The optical path system of a retroreflection coefficient testing apparatus according to claim 3, wherein the outer clip (86) has a first fixing plate portion (861), an arc plate portion (862) and a stay plate portion (863) connected in this order, the first fixing plate portion (861) passing through a first through hole (842) of the lower cover (84) from inside the lower cover (84) and being fixed inside the first through hole (842), one side of the arc plate portion (862) being pressed against the special filter (85), the other side of the arc plate portion (862) being pressed against an end face of the screw portion (832), the stay plate portion (863) being pressed against an inner side wall of the lower cover (84), a free end of the stay plate portion (863) extending in a direction of an axis of the lower cover (84) toward an inner bottom face of the mounting chamber (847).
5. The optical path system of the retroreflection coefficient testing apparatus according to claim 4, characterized in that the stay plate portion (863) has a plug plate portion (8631) on a free end thereof, the plug plate portion (8631) extends toward an inner bottom surface of the mounting cavity (847) through a plug hole (8611) of the first fixing plate portion (861), and the plug plate portion (8631) is slidably fitted with the plug hole (8611).
6. The optical path system of a retroreflection coefficient testing apparatus according to claim 1, wherein the radial positioning assembly (87) includes:
a limiting cylinder (871), wherein the front end of the limiting cylinder (871) sequentially passes through a threaded hole (844) and a second perforation (843) on the side wall of the lower cover (84) to extend into the lower cover (84);
The top bead (872) is movably arranged in the limit cylinder (871), and the top of the top bead (872) can extend out of the front end of the limit cylinder (871) and is propped against the peripheral wall of the special optical filter (85);
a blocking piece (874), wherein the blocking piece (874) is fixed in the threaded hole (844), and the blocking piece (874) presses a bottom ring part (8711) of the limiting cylinder (871) against the bottom wall of the threaded hole (844);
And a pressing spring (873), wherein the pressing spring (873) is arranged in the limiting cylinder (871) and is positioned between the top bead (872) and the blocking piece (874).
7. The optical path system of the retroreflection coefficient testing device according to claim 6, wherein the limiting cylinder (871) is provided with a plurality of limiting claw portions (8712), the plurality of limiting claw portions (8712) are arranged on the bottom ring portion (8711) at intervals, the plurality of limiting claw portions (8712) extend to the inside of the lower cover (84) through the second through holes (843), the front end of the limiting claw portion (8712) is provided with an inward curved portion (87121), and the aperture of a hole surrounded by the plurality of inward curved portions (87121) is smaller than the diameter of the top bead (872).
8. A light path system of a retroreflection coefficient testing apparatus according to claim 3, wherein the hook member (88) has a second fixing plate portion (881), a seat plate portion (882), a straight plate portion (883) and an arc bending plate portion (884) connected in this order, the second fixing plate portion (881) passes through a third through hole (845) on the bottom of the lower cover (84) from inside the lower cover (84) and is fixedly connected to the third through hole (845), the seat plate portion (882) is embedded in an embedded groove (846) of the inner bottom surface of the installation cavity (847), the straight plate portion (883) passes through a clamping groove (851) on the outer circumference of the special filter (85) from one side of the special filter (85) to the other side of the special filter (85), and a portion of the straight plate portion (883) is pressed against the bottom surface of the clamping groove (841) and the arc bending plate portion (884) is pressed against the special filter (85) on the other side of the special filter (85).
9. The optical path system of the retroreflection coefficient testing apparatus according to claim 8, wherein the clamping groove (851) has an arc-shaped guide surface (852) so that the arc-shaped plate portion (884) is clamped on the other side of the special filter (85) through the clamping groove (851).
10. The optical path system of the retroreflection coefficient testing device according to claim 1, wherein the center points of the reference photosensor (3), the first optical filter (5), the convex mirror (6) and the point light source (7) are on the same horizontal line.
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| CN112557348B (en) * | 2021-01-04 | 2023-12-19 | 中交国通公路工程技术有限公司 | Convenient-to-use retroreflection coefficient tester |
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