CN214668574U

CN214668574U - Be applied to light intensity compensation subassembly of contrary reflectance tester

Info

Publication number: CN214668574U
Application number: CN202120448197.0U
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

The utility model provides a be applied to light intensity compensation subassembly of contrary reflectance tester, belongs to contrary reflectance measurement technical field. Including light source (6), its characterized in that: the front end of the light source (6) is provided with a measuring plate (4), the end face, facing the measured material, of the measuring plate (4) is provided with a plurality of reflected light intensity sensors which are used for measuring the light intensity of reflected light side by side, and the light path of emergent light of the light source (6) is also provided with an emergent light intensity sensor which is used for measuring the light intensity of emergent light. In this light intensity compensation subassembly that should be used for contrary reflectance tester, through setting up reverberation light intensity sensor and emergent light intensity sensor, at the measurement process each time, all can measure the light intensity of emergent light sum reverberation, consequently all adopt real-time measured value to calculate at the in-process of calculating, consequently can ignore because of the influence that the light source decay caused final measuring result, guaranteed final measurement accuracy.

Description

Be applied to light intensity compensation subassembly of contrary reflectance tester

Technical Field

The utility model provides a be applied to light intensity compensation subassembly of contrary reflectance tester, belongs to contrary reflectance measurement technical field.

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.

The basic principle of the calculation of the coefficient of retroreflection is: during testing, light emitted by the light source irradiates the surface of the retroreflection material and is reflected by the retroreflection material, then the light returns in the original path, the light intensity of the reflected light is measured at the specified distance of the light reflection loop, and the retroreflection coefficient of the retroreflection material is finally calculated by combining a conventional calculation formula according to the light intensity of the reflected light and the light intensity of the emergent light.

In the handheld reflectance tester on the market, the LED is generally used as a light source in cooperation with the optical fiber, however, the light intensity emitted by the LED is attenuated along with the increase of the service time. And the operating temperature also has a large influence on the light intensity of the LED. However, when the control circuit of the currently marketed handheld reflectance tester calculates the retroreflection coefficient, the light intensity of the reflected light is a real-time collection amount, the control circuit updates the light intensity value of the reflected light every time the calculation is performed, and the light intensity of the emitted light is generally a set value, that is, the control circuit adopts a preset value and a real-time measured value. It can be known from the above that the actually emitted light intensity has a larger deviation than the set value, so that a deviation occurs in the actual calculation, and the deviation increases with the increase of the use time, which has a large influence on the measurement accuracy.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the reflected light intensity sensor and the emergent light intensity sensor are arranged, the light intensity of reflected light and the light intensity of emergent light are measured respectively, the influence on the final measurement result due to light source attenuation can be ignored, and the light intensity compensation assembly applied to the retroreflection coefficient tester and ensuring the final measurement precision is provided.

The utility model provides a technical scheme that its technical problem adopted is: should include the light source, its characterized in that: the front end of the light source is provided with a measuring plate, the end face of the measuring plate facing the measured material is provided with a reflected light intensity sensor used for measuring the light intensity of reflected light, an emergent light intensity sensor used for measuring the light intensity of emergent light is also arranged on the light path of emergent light of the light source, and the output ends of the reflected light intensity sensor and the emergent light intensity sensor are simultaneously connected into a control circuit.

Preferably, the light path cassette is arranged, a notch is arranged at one corner of the light path cassette where the light source is arranged, the light source is fixed at the notch, a groove is arranged on the front end face of the notch, and the measuring plate is fixed in the groove at the front end of the notch.

Preferably, a diagonal of the light path cassette with respect to the light source is a light inlet/outlet of the light path cassette, a lens is disposed at the light inlet/outlet, and the emergent light intensity sensor is located at one side of the lens.

Preferably, the light source comprises a light source back plate, the LED light emitting element is fixed on the front end surface of the light source back plate, and a light tube is fixed at the front end of the LED light emitting element.

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 reflected light intensity sensors are provided, a lead hole is further provided at a side portion of the measuring plate, and a signal line of the reflected light intensity sensor passes through the lead hole.

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

1. in this light intensity compensation subassembly that should be used for contrary reflectance tester, through setting up reverberation light intensity sensor and emergent light intensity sensor, at the measurement process each time, all can measure the light intensity of emergent light sum reverberation, consequently all adopt real-time measured value to calculate at the in-process of calculating, consequently can ignore because of the influence that the light source decay caused final measuring result, guaranteed final measurement accuracy.

2. 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.

3. 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 schematic view of a light intensity compensation assembly for use in a retroreflection coefficient measuring apparatus.

FIG. 2 is a schematic view of a light source structure of a light intensity compensation assembly applied to a retroreflection coefficient tester.

Wherein: 1. lens 2, emergent light intensity sensor 3, light path magazine 4, measuring board 5, pin hole 6, light source 7, light section of thick bamboo 8, fixed block 9, light source backplate 10, radiator 11, fixed plate.

Detailed Description

Fig. 1 to 2 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 2.

As shown in fig. 1, a light intensity compensation assembly (hereinafter referred to as light intensity compensation assembly) applied to a retroreflection coefficient tester includes a light source cassette 3, a notch is disposed at one corner of the light path cassette 3, a groove is disposed on a front end surface of the notch, a light source 6 is fixed at the notch of the light path cassette 3, and a measurement plate 4 is fixed in the groove at the front end of the notch and located at the front end of the light source 6. A diagonal line of the light path cassette 3 with respect to the light source 6 is a light ray inlet and outlet of the light path cassette 3, and the lens 1 is provided at the light ray inlet and outlet.

Be provided with the polylith speculum that realizes light reflection in light path magazine 3, polylith speculum is crisscross to be set up, light passes measuring plate 4 entering light path magazine 3 after sending from light source 6, light jets out and shines by the measured material surface from lens 1 with the help of speculum multiple reflection back in light path magazine 3, one side at lens 1 is provided with emergent light intensity sensor 2, the circuit board at emergent light intensity sensor 2 place passes through the form of slot and pegs graft at the lateral part of lens 1, measure the light intensity of light source 6 efflux light through emergent light intensity sensor 2, and send measured data into in the control circuit of handheld retroreflection coefficient tester.

The light is emitted from the lens 1 and then irradiates the surface of the material to be measured, then is reflected by the material to be measured and returns through the lens 1, and is reflected by the reflector in the light path cassette 3 and then irradiates the surface of the measuring plate 4. A plurality of reflected light intensity sensors (not shown) are arranged side by side on the plate surface of the measurement plate 4 facing the light path cassette 3, the reflected light intensity sensors at different positions form different observation angles relative to the reflected light, and the reflected light is measured at different observation angles by the different reflected light intensity sensors. Lead holes 5 are further formed in the side portion of the groove for fixing the measuring plate 4 on the light path cassette 3, and signal lines of the reflected light intensity sensor output light intensity data through the lead holes 5.

As shown in fig. 2, the light source 6 includes a light source back plate 9, an LED light emitting element (hereinafter referred to as LED) is welded on the surface of the light source back plate 9, and a power supply of the LED is connected to the LED through the light source back plate 9. The light source back plate 9 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. A fixing block 8 is arranged at the front end of the light source backboard 9, and the light source backboard 9 is fixed at the gap of the light path cassette 3 through the fixing block 8.

A conical light tube 7 is fixed at the front end of the LED, the light emitting area of the light emitted by the light source 6 is limited by the size of the opening at the front end of the light tube 7, a through hole is arranged in the fixed block 8, and the front end of the fixed block 8 of the light tube 7 is LED out after passing through the fixed block 8.

A fixing plate 11 is arranged at the rear part of the light source back plate 9, the fixing plate 11 is fixed at the rear part of the light source back plate 9 through a plurality of fixing bolts on the periphery, and a heat sink 10 is arranged between the light source back plate 9 and the fixing plate 11. When the LED works, the heat dissipated by the LED is conducted to the heat sink 10 through the light source back plate 9, and further heat dissipation is realized through the heat sink 10.

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 3, and when the test is started, the light emitted by the light source 6 passes through the measuring plate 4 and enters the light path cassette 3. The light is emitted from the lens 1 after being reflected for a plurality of times in the light path cassette 3 by the reflector and irradiates the surface of the measured material, and the light intensity of the emergent light is measured by the emergent light intensity sensor 2 at the side part of the lens 1 when the light is emitted out of the lens 1.

The light rays irradiate the surface of the material to be measured after being reflected for a plurality of times in the light path cassette 3 and are reflected by the material to be measured. The reflected light is reflected and then irradiates on the reflected light intensity sensor on the front surface of the measuring plate 4, the reflected light intensity sensors at different positions form different observation angles relative to the reflected light, the different reflected light intensity sensors measure the light intensity of the reflected light at different observation angles, and a signal wire of the reflected light intensity sensor outputs light intensity data through the lead hole 5 and sends the light intensity data into a control circuit of the handheld retroreflection coefficient tester.

Therefore, in each measurement process, the control circuit measures the light intensity of the emergent light and the reflected light, and the control circuit calculates by adopting a real-time measurement value in the calculation process, so that the influence on the final measurement result due to the attenuation of the light source 6 can be ignored, and the final measurement precision is ensured.

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. An optical intensity compensation assembly for use in a coefficient of retroreflection tester, comprising a light source (6), characterized in that: the light source device is characterized in that a measuring plate (4) is arranged at the front end of a light source (6), a reflected light intensity sensor used for measuring the light intensity of reflected light is arranged on the end face, facing a measured material, of the measuring plate (4), an emergent light intensity sensor (2) used for measuring the light intensity of emergent light is further arranged on the light path of emergent light of the light source (6), and the output ends of the reflected light intensity sensor and the emergent light intensity sensor (2) are simultaneously connected into a control circuit.

2. The light intensity compensation assembly of claim 1, wherein the light intensity compensation assembly comprises: the light path measuring device is provided with a light path cassette (3), a notch is arranged at one corner of the light path cassette (3), the light source (6) is fixed at the notch, a groove is arranged on the front end face of the notch, and the measuring plate (4) is fixed in the groove at the front end of the notch.

3. The light intensity compensation assembly of claim 2, wherein the light intensity compensation assembly comprises: a diagonal of the light path cassette (3) relative to the light source (6) is a light inlet and outlet of the light path cassette (3), a lens (1) is arranged at the light inlet and outlet, and the emergent light intensity sensor (2) is positioned on one side of the lens (1).

4. The light intensity compensation assembly of claim 1, wherein the light intensity compensation assembly comprises: the light source (6) comprises a light source back plate (9), the LED light-emitting element is fixed on the front end face of the light source back plate (9), and the light cylinder (7) is fixed at the front end of the LED light-emitting element.

5. The light intensity compensation assembly of claim 4, wherein the light intensity compensation assembly comprises: a fixing plate (11) is fixed on the back surface of the light source back plate (9) through a plurality of bolts, and a heat sink (10) is fixed between the light source back plate (9) and the fixing plate (11).

6. The light intensity compensation assembly of claim 4, wherein the light intensity compensation assembly comprises: the front end of the light source (6) is also provided with a fixed block (8), and the light cylinder (7) penetrates through the fixed block (8) from back to front.

7. The light intensity compensation assembly of claim 2, wherein the light intensity compensation assembly comprises: the light intensity sensors are provided with a plurality of light intensity sensors, the side part of the measuring plate (4) is also provided with a lead hole (5), and a signal wire of the light intensity sensors penetrates through the lead hole (5).