CN214668573U

CN214668573U - Light source emission assembly of hand-held type contrary reflectance tester

Info

Publication number: CN214668573U
Application number: CN202120448177.3U
Authority: CN
Inventors: 马帅
Original assignee: Zibo Yili Electronics Co ltd
Current assignee: Zibo Yili Electronics Co ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-11-09
Anticipated expiration: 2031-03-02

Abstract

A light source emission assembly of a handheld retroreflection coefficient tester belongs to the technical field of retroreflection coefficient testing. The method is characterized in that: the measuring device comprises a light source (4) and a measuring plate (2), wherein the measuring plate (2) is fixed at the front end of the light source (4), the light source (4) and a measured material are respectively positioned at two sides of the measuring plate (2), a light hole (12) for light rays of the light source (4) to pass through is formed in the measuring plate (2), and a plurality of light intensity sensors (13) are arranged side by side on the end face, facing the measured material, of the measuring plate (2). In the light source emission subassembly of this hand-held type contrary reflectance tester, measure the board through setting up, set up a plurality of light intensity sensors on measuring the board to set up light source and measured material respectively in the both sides of measuring the board, avoided among the prior art through the comparatively complicated defect of semi-transparent semi-reflective component realization of measurement scheme kind structure.

Description

Light source emission assembly of hand-held type contrary reflectance tester

Technical Field

A light source emission assembly of a handheld retroreflection coefficient tester belongs to the technical field of retroreflection coefficient testing.

Background

At present, the application of the retroreflective material in the traffic industry is wider and wider, and the retroreflective material is used in traffic safety facilities such as traffic signs, raised road signs, pavement markings and the like. Whether a retroreflective material is acceptable or not becomes a key factor affecting the engineering quality, and measuring the coefficient of retroreflection of a retroreflective material is an important parameter for determining whether a retroreflective material is acceptable or not.

Currently, the coefficient of retroreflection of retroreflective materials is typically measured in the metrology sector by large retroreflective test systems. During testing, light emitted by the light source irradiates the surface of the retro-reflective material and is reflected by the retro-reflective material, the light returns in the original path, and then the light intensity of the reflected light is measured at different observation angles at specified distances of the light reflection loop, so that the retro-reflective coefficient of the retro-reflective material is finally obtained. With the continuous development of reflection coefficient measuring instruments, handheld reflection coefficient measuring instruments appear on the market, however, in the prior art, the handheld reflection coefficient measuring instruments generally have the following defects:

(1) when measurement at different observation angles is realized, a large-scale retro-reflection test system generally lifts the optical detector to different heights through a precise lifting mechanism so as to realize different observation angles. However, the handheld reflectance tester cannot be provided with a precise lifting mechanism inside to satisfy different observation angles.

(2) In a reflection coefficient tester (test system) in the prior art, the measurement is generally realized by a semitransparent and semitransparent reflective element, after a light source irradiates the semitransparent and semitransparent reflective element, part of incident light is reflected to a measured material, and the measurement of a reflection coefficient is further realized.

(3) In the prior art, the light source is generally realized by adopting optical fibers, but the optical fibers are expensive and difficult to fix, so that the internal structure of the reflectance tester is too complex, and the design cost is increased.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide one kind and measure the board through the setting, set up a plurality of light intensity sensors on measuring the board, and set up the light source respectively with the material that is surveyed in the both sides of measuring the board, shine after the light trap of measuring the board is seen through to the light source, and detect the light intensity of reverberation through the light intensity sensor who sets up on measuring the board, the light source emission subassembly of the handheld contrary reflectance tester of the complicated drawback of structure when having avoided needing to set up half-transparent half-reflecting component to realize contrary reflectance among the prior art.

The utility model provides a technical scheme that its technical problem adopted is: this hand-held type contrary reflectance tester's light source emission subassembly, its characterized in that: the measuring plate is fixed at the front end of the light source, the light source and the measured material are respectively located on two sides of the measuring plate, light holes for light rays of the light source to pass through are formed in the measuring plate, and a plurality of light intensity sensors are arranged on the measuring plate side by side and face to the measured material.

Preferably, the light source comprises a light source backboard, the LED light-emitting element is fixed on the front end face of the light source backboard, a light tube is fixed at the front end of the LED light-emitting element, and the light tube is opposite to the light-transmitting hole.

Preferably, a fixing plate is fixed to the back surface of the light source back plate by a plurality of bolts, and a heat sink is fixed between the light source back plate and the fixing plate.

Preferably, a fixed block is further arranged at the front end of the light source, and the light cylinder penetrates through the fixed block from back to front.

Preferably, the plurality of light intensity sensors are arranged on one side of the light hole side by side, and the other side of the light hole is also provided with a color sensor.

Preferably, the three light intensity sensors form observation angles of 0.2 degrees, 0.5 degrees and 1 degree with the incident optical axis of the measured material respectively.

Preferably, the measuring plate comprises a base plate, and the outer ring of the base plate is provided with a plurality of fixing holes.

Preferably, a data interface is arranged on the back surface of the substrate, and the output ends of the light intensity sensor and the color sensor are connected into the data interface.

Preferably, the substrate is a PCB, and a circuit is disposed on the substrate to connect the output ends of the light intensity sensor and the color sensor to the data interface.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

1. in the light source emission subassembly of this hand-held type contrary reflectance tester, measure the board through setting up, set up a plurality of light intensity sensors on measuring the board, and set up the light source respectively with the material that is surveyed in the both sides of measuring the board, shine after the light inlet that the light source sees through measuring the board to be surveyed the material surface, and detect the light intensity of reverberation through the light intensity sensor that sets up on measuring the board, the drawback that the structure is complicated when having avoided needing to set up half-transparent half-reflection component among the prior art and realizing contrary reflectance.

2. Through setting up color sensor, realized the test to being surveyed material colour simultaneously.

3. The rear part of the light source back plate is provided with a fixing plate, the fixing plate is fixed at the rear part of the light source back plate through a plurality of fixing bolts on the periphery, and a radiator is arranged between the light source back plate and the fixing plate. The heat dissipated by the LED during working is conducted to the radiator through the light source back plate, and further heat dissipation is achieved through the radiator.

4. The LED is directly adopted as a light source to emit light, so that the defects of high price and complex structure when optical fibers are adopted as light emitting elements in the prior art are overcome.

Drawings

FIG. 1 is a front view of a light source emitting assembly of a hand-held retroreflective factor tester.

FIG. 2 is a top view of a light source emitting assembly of a hand-held retroreflective factor tester.

FIG. 3 is a front view of a light source emitting assembly measuring panel of the hand-held retroreflective factor tester.

FIG. 4 is a rear view of a light source emitting assembly measurement plate of the hand-held retroreflective factor tester.

Wherein: 1. light path cassette 2, measuring board 3, lead hole 4, light source 5, light cylinder 6, fixed block 7, light source backplate 8, radiator 9, fixed plate 10, fixed orifices 11, color sensor 12, light trap 13, light intensity sensor 14, base plate 15, data interface.

Detailed Description

Fig. 1 to 4 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 4.

As shown in fig. 1, a light source emitting assembly (hereinafter referred to as light source assembly) of a hand-held retroreflection factor tester includes a light source 4 and a measuring board 2. A notch is arranged at one corner of the light path cassette 1, a groove is arranged on the front end face of the notch, the light source 4 is fixed at the notch of the light path cassette 1, and the measuring plate 2 is fixed in the groove at the front end of the notch and is positioned at the front end of the light source 4. A plurality of reflectors for reflecting light are arranged in the light path cassette 1, and the reflectors are arranged in a staggered mode. In order to satisfy the effect of multiple linear reflections of light, the number, the arrangement position and the inclination angle of the reflectors can be calculated by common general knowledge in the art, and will not be described herein.

As shown in fig. 2, the light source 4 includes a light source back plate 7, an LED light emitting element (hereinafter referred to as LED) is welded on the surface of the light source back plate 7, and a power supply of the LED is connected to the LED through the light source back plate 7. The light source back plate 7 is preferably implemented by an aluminum substrate, and the heat dissipation of the LED aluminum substrate can be realized while the power supply for the LED is realized. The front end of the light source backboard 7 is provided with a fixing block 6, and the light source backboard 7 is fixed at the gap of the light path cassette 1 through the fixing block 6.

A conical light tube 5 is fixed at the front end of the LED, the light emitting area of the light emitted by the light source 4 is limited by the size of the opening at the front end of the light tube 5, a through hole is arranged in the fixed block 6, and the front end of the fixed block 6 of the light tube 5 is LED out after passing through the fixed block 6.

The rear part of the light source back plate 7 is provided with a fixing plate 9, the fixing plate 9 is fixed at the rear part of the light source back plate 7 through a plurality of fixing bolts on the periphery, and a radiator 8 is arranged between the light source back plate 7 and the fixing plate 9. When the LED works, the heat dissipated by the LED is conducted to the radiator 8 through the light source back plate 7, and further heat dissipation is realized through the radiator 8.

As shown in fig. 3 to 4, the measuring plate 2 includes a rectangular base plate 14, and a plurality of fixing holes 10 for fixing the base plate 14 are formed on the periphery of the base plate 14.

A light hole 12 is formed on the front surface of the substrate 14, the outlet of the light cylinder 5 faces the light hole 12, and light emitted from the light cylinder 5 passes through the measurement plate 2 through the light hole 12. Three light intensity sensors 13 are sequentially fixed to one side of the light-transmitting hole 12 along the longitudinal direction of the substrate 14, and a color sensor 11 is disposed on the other side of the light-transmitting hole 12. A data interface 15 is provided at the rear end of the substrate 14. The color sensor 11 may be disposed at other positions on the front surface of the substrate 14.

The substrate 14 can be implemented by a common PCB, and necessary circuits are disposed on the PCB, components and peripheral circuits (not shown) necessary for implementing the operations of the light intensity sensor 13 and the color sensor 11 are connected to corresponding pins of the light intensity sensor 13 and the color sensor 11, and signal output terminals of the light intensity sensor 13 and the color sensor 11 are connected to the data interface 15, so as to implement data transmission. The lateral part of the groove for fixing the measuring plate 2 on the light path cassette 1 is also provided with a lead hole 3, and the signal wire is connected with a data interface 15 through the lead hole 3.

The specific working process and working principle are as follows:

when the retroreflection coefficient is tested, the tested material is placed at the required position of the front end of the light path cassette 1, and when the test is started, the light emitted by the light source 4 enters the light path cassette 1 after passing through the light hole 12. The light rays irradiate the surface of the material to be detected after being reflected for a plurality of times in the light path cassette 1 and are reflected by the material to be detected. The reflected light is reflected and then irradiated on the light intensity sensor 13 and the color sensor 11 on the front surface of the substrate 14.

The three light intensity sensors 13 on the surface of the substrate 14 correspond to the positions of the observation angles of 0.2 °, 0.5 ° and 1 ° respectively, and are used for detecting the light intensities of the reflected light at the observation angles of 0.2 °, 0.5 ° and 1 °, and other numbers of the light intensity sensors 13 may be set as required to meet the requirements of other observation angles.

After the reflected light is irradiated onto the color sensor 11, the reflected light is used for detecting the color of the material to be detected by the color sensor 11. The light intensity sensor 13 and the color sensor 11 send the detected data into a control circuit of the hand-held retroreflection coefficient tester, and the retroreflection coefficient of the tested material is further calculated by the control circuit.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A light source emission subassembly of hand-held type contrary reflectance tester which characterized in that: the measuring device comprises a light source (4) and a measuring plate (2), wherein the measuring plate (2) is fixed at the front end of the light source (4), the light source (4) and a measured material are respectively positioned at two sides of the measuring plate (2), a light hole (12) for light rays of the light source (4) to pass through is formed in the measuring plate (2), and a plurality of light intensity sensors (13) are arranged side by side on the end face, facing the measured material, of the measuring plate (2).

2. The light source emitting assembly of a hand-held coefficient of retroreflection tester of claim 1, wherein: the light source (4) comprises a light source back plate (7), the LED light-emitting element is fixed on the front end face of the light source back plate (7), the light cylinder (5) is fixed at the front end of the LED light-emitting element, and the light cylinder (5) is opposite to the light-transmitting hole (12).

3. The light source emitting assembly of a hand-held coefficient of retroreflection tester of claim 2, wherein: a fixing plate (9) is fixed on the back surface of the light source back plate (7) through a plurality of bolts, and a radiator (8) is fixed between the light source back plate (7) and the fixing plate (9).

4. The light source emitting assembly of a hand-held coefficient of retroreflection tester of claim 2, wherein: the front end of the light source (4) is also provided with a fixed block (6), and the light cylinder (5) penetrates through the fixed block (6) from back to front.

5. The light source emitting assembly of a hand-held coefficient of retroreflection tester of claim 1, wherein: the light intensity sensors (13) are arranged on one side of the light hole (12) side by side, and the color sensor (11) is further arranged on the other side of the light hole (12).

6. The light source emitting assembly of a hand-held reflectance meter according to claim 1 or 5, wherein: the three light intensity sensors (13) are arranged, and the three light intensity sensors (13) and the incident light axis of the material to be detected form observation angles of 0.2 degrees, 0.5 degrees and 1 degree respectively.

7. The light source emitting assembly of a hand-held coefficient of retroreflection tester of claim 1, wherein: the measuring plate (2) comprises a base plate (14), and a plurality of fixing holes (10) are formed in the outer ring of the base plate (14).

8. The light source emitting assembly of a hand-held coefficient of retroreflection tester of claim 7, wherein: the back of the substrate (14) is provided with a data interface (15), and the output ends of the light intensity sensor (13) and the color sensor (11) are connected into the data interface (15).

9. The light source emitting assembly of a hand-held coefficient of retroreflection tester of claim 7, wherein: the base plate (14) is a PCB circuit board, a circuit is arranged on the base plate (14), and the output ends of the light intensity sensor (13) and the color sensor (11) are connected with the data interface (15).