CN216978826U

CN216978826U - Retro-reflection measuring device

Info

Publication number: CN216978826U
Application number: CN202220136811.4U
Authority: CN
Inventors: 潘建根; 任辉军; 温莹莹
Original assignee: Hangzhou Everfine Photo E Info Co Ltd
Current assignee: Hangzhou Everfine Photo E Info Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-07-15
Anticipated expiration: 2032-01-19

Abstract

The utility model provides a retro-reflection measuring device which comprises a light source, a sample table for placing a measured sample, an observation table, a control system, a luminosity measuring unit and a color measuring unit, wherein the luminosity measuring unit and the color measuring unit are positioned on the observation table, light emitted by the light source is incident on the measured sample at a certain irradiation angle, and retro-reflection light of the measured sample is received by the luminosity measuring unit and the color measuring unit, so that the measurement of the luminosity and the color characteristics of the retro-reflection of the measured sample is realized.

Description

Retro-reflection measuring device

Technical Field

The utility model relates to the technical field of optical radiation measurement, in particular to a retro-reflection measurement device.

Background

The retro-reflection material is mainly used in the fields of traffic safety warning signs such as road traffic signs, marking lines and various sight line inducing facilities, plays an important role in guaranteeing road traffic and personal safety, and has a key technical index and a key significance in effectively measuring the retro-reflection material. The retro-reflector is one of the most important retro-reflective materials, and test methods and test rules are respectively specified in GB11564-2008 motor vehicle retro-reflector and ECE R3-2005 uniformity correction of the upper of reflection-reflecting devices for power-drive vehicles and the following routers, where the standards indicate that luminosity and chromaticity are the most important detection parameters of the retro-reflector, and luminosity is expressed by using the value of Luminous intensity coefficient CIL (coefficient of luminescence intensity), and the unit is mcd/lx, and chromaticity is expressed by using color coordinates. Currently, the photometric parameters of retroreflectors are more well measured, but the colorimetric parameters are relatively less.

Patent CN105954009B discloses a testing device for a retro-reflector of a motor vehicle, which uses a spectrometer to measure the spectrum of the reflected light of the retro-reflector, and obtains the specular reflection coefficient and the spectral reflectivity curve, thereby obtaining the luminous intensity coefficient and the color coordinate of the retro-reflector under any illumination condition. However, in the actual measurement process, the light source illuminates the retro-reflector under a certain illumination angle, the light retro-reflected by the retro-reflector is received by the spectrometer, the optical path of the illumination light path and the reflection light path in the test process is long, generally 30 meters, the light signal reaching the spectrometer through retro-reflection is weak, and the typical illumination value is 10^-5lx, the sensitivity of the spectrometer is low, and the spectrometer is influenced by external environmental factors, so that the accurate measurement of the spectral characteristics of the retro-reflector and the corresponding photometric and colorimetric parameters is difficult to realize.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the retro-reflection measuring device which not only can realize the measurement of the optical characteristics and the color characteristics of a reflecting material or a retro-reflector, but also has the characteristics of high measuring accuracy, good stability, convenient operation and the like.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a retro-reflection measuring device which comprises a light source, a sample table for placing a sample to be measured, an observation table, a control system, a luminosity measuring unit and a color measuring unit, wherein the luminosity measuring unit and the color measuring unit are positioned on the observation table; the light source is arranged in the observation platform or is independently arranged through the support frame, light emitted by the light source is incident on the tested sample at a certain irradiation angle, and the retro-reflected light of the tested sample is received by the luminosity measurement unit and the color measurement unit, so that the measurement of the retro-reflected luminosity and the color characteristics of the tested sample is realized.

As a technical scheme, a lifting mechanism is arranged on the observation platform and is electrically connected with a control system, the photometric measurement unit is arranged on the lifting mechanism and is controlled to lift to a specified observation angle through the lifting mechanism, so that the retro-reflection characteristic of a measured sample can be conveniently measured, and meanwhile, the accuracy and the stability of a measurement result are ensured.

As a technical scheme, the color measuring unit is arranged behind the luminosity measuring unit. The retro-reflection light of the measured sample firstly enters the luminosity measuring unit, the luminosity measuring unit is controlled to ascend through the lifting mechanism, so that the retro-reflection light can enter the color measuring unit behind the luminosity measuring unit, and the measurement of the retro-reflection luminosity and the color characteristic of the measured sample is realized.

In actual measurement, the measurement of the retro-reflection characteristic includes two optical paths, namely an illumination optical path and an observation optical path, the optical path in which light is emitted by the light source and is incident on the sample to be measured according to a certain illumination angle is the illumination optical path, and the optical path in which the retro-reflection light emitted by the sample to be measured is received by a measurement unit (such as a photometric measurement unit and a color measurement unit) is the observation optical path. The photometric measurement unit is used for measuring photometric characteristics of a measured sample, and comprises but is not limited to a photometric detector or a photometric probe or an illuminance detector; the color measuring unit is used for measuring the color characteristics of the measured sample, including but not limited to a spectrophotometer and a colorimeter, and can obtain color data through measuring the reflectivity spectral curve data of the surface of the measured sample and further calculating. In the technical scheme, the color measuring unit is arranged behind the luminosity measuring unit, and the lifting mechanism is arranged on one side of the observation light path, namely, the retro-reflection light emitted by the measured sample is not shielded. Specifically, the optical characteristics may be measured by the photometric measurement unit, and then the elevation of the elevating mechanism is controlled by the control system, so that the photometric measurement unit is raised to a certain position, and the color characteristics are measured by the color measurement unit. In most cases, the spatial color distribution of the retro-reflector is relatively uniform, so that a larger aperture angle can be adopted in color measurement to obtain more optical signals, thereby improving the measurement accuracy. The technical scheme has the advantages of high measuring speed, high accuracy and good stability. The sample to be measured here may be a retro-reflector, retro-reflective material or generally reflective material.

Furthermore, in the above technical solution, the sample stage further comprises a rotation driving device, the sample stage is connected with the rotation driving device, and the rotation driving device is electrically connected with the control system. Through control system control rotation drive arrangement, and then control by survey sample and rotate to appointed angle, make things convenient for survey by survey sample retro-reflection characteristic's measurement. Furthermore, the rotation can be carried out about two mutually perpendicular axes.

Further, in the above technical solution, the color measuring unit includes an imaging lens, and the color measuring unit receives the light beam from the sample to be measured through the imaging lens. The imaging lens is used for receiving the light beam reflected by the tested sample, so that the color information of the tested sample can be visually recorded and fed back, the color measurement of the reflecting materials made of various materials can be adapted, the measurement accuracy is further ensured, and the finally obtained color data has higher reliability. Furthermore, the color measurement unit further comprises an alignment light path, a light splitter is arranged in the light path behind the imaging lens, and the alignment light path receives the light beam from the light splitter, so that the accuracy of the measurement result is further ensured.

In the above technical solution, the light source may be a tungsten halogen lamp, a high intensity discharge lamp, or an LED lamp, and a collimating light path for collimating light is built in the light source, so that retro-reflection parameters can be accurately measured, and accuracy of a measurement result is ensured.

In the above technical solution, the light source may be a dimmable LED formed by combining LEDs with more than one color. Further, the light source is electrically connected with a control system, the control system controls the light source to emit light in a single color or in a combination of multiple colors, and light beams emitted by the light source irradiate the sample to be measured to measure the retro-reflection characteristics of the sample to be measured. The light source of the present invention can be implemented in various ways, for example, it can be an LED array including a plurality of LEDs with different colors, and the light emitted by each LED with different colors independently or in combination on the LED array directly irradiates on the sample to be measured, so as to implement the measurement of the retro-reflection characteristics of the sample to be measured under different irradiation light sources. The light sources are controlled by the control system to emit light individually or in combination so as to change the spectral power distribution of the incident light source, thereby being suitable for various light sources irradiating the retro reflector in practical application. In real life, for example, on roads, early automobile lights are mostly halogen lamps close to a standard A light source, so that the retro-reflection luminosity and chromaticity parameters in the relevant standards are provided based on the A light source. However, the existing car lights are very abundant, including xenon headlights, LED headlights, laser headlights, etc., and their spectral components are also different, so it is necessary to measure the retro-reflection parameters under different irradiation light source spectrums, and the technical solution can conveniently implement the measurement.

In addition, in the above technical solution, the light blocking device is further included for preventing light emitted by the light source from directly entering the photometric measurement unit and/or the color measurement unit, so as to further ensure accuracy of measurement results and avoid the influence of stray light. Because the light emitted from the light source not only irradiates on the measured sample, but also a part of the light can be directly incident into the measuring unit if the light blocking device is not arranged, thereby influencing the measuring result and increasing the measuring error, and the light blocking device can prevent the part of the light from being directly incident into the measuring unit, thereby avoiding causing the measuring error. The light blocking device and the light source can be designed integrally, such as a directional LED lamp, and the light blocking device is an optical reflecting device in the lamp, so that light beams emitted by the light source are intensively irradiated on a sample to be measured; or the light blocking device and the light source are of two mutually separated independent structures, and if the light blocking device is a reflector, light emitted by the light source and in the direction opposite to the direction of the sample to be measured is reflected to avoid the light from directly entering the measuring unit.

As a technical solution, the above device further includes a laser for aligning the position of the sample to be measured, and an optical axis of the laser coincides with an optical axis of emergent light of the light source; after alignment, the laser is removed and a measurement of the retro-reflection properties can be made. This technical scheme can ensure that the light source sent jets into on being surveyed the sample, and the simplified operation is further convenient to be measured.

Preferably, the light source, the light blocking device, the luminosity measuring unit, the color measuring unit, the laser, the lifting mechanism, the control system and the like are arranged in the observation platform, so that the integration degree is high, the design is integrated, and the operation is further simplified.

The utility model has the beneficial effects that: the utility model provides a retro-reflection measuring device, which adopts a luminosity measuring unit and a color measuring unit to measure the retro-reflection characteristic of a measured sample, can realize the comprehensive measurement of the luminosity and the color of the measured sample, and has the advantages of high measuring speed, high accuracy and good stability.

Drawings

FIG. 1 is a schematic view of one embodiment of the present invention;

in the figure: 1. the device comprises a light source, 2, a sample table, 3, a sample to be detected, 4-1, a luminosity measurement unit, 4-2, a color measurement unit, 5, an observation table, 6, an imaging lens, 7, a lifting mechanism, 8, a control system, 9 and a rotation driving device.

Detailed Description

The following description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but it should be understood by those skilled in the art that the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the following embodiments without departing from the scope and spirit of the utility model. The scope of protection of the utility model is defined by the appended claims.

As shown in fig. 1, the embodiment discloses a retro-reflection measurement device, which comprises a light source (1), a sample stage (2) for placing a sample (3) to be measured, an observation stage (5), a control system (8), and a photometric measurement unit (4-1) and a color measurement unit (4-2) which are positioned on the observation stage (5); the photometric measurement unit (4-1) is arranged on a lifting mechanism (7) of the observation platform (5); the color measuring unit (4-2) is positioned behind the luminosity measuring unit (4-1) and arranged on the observation platform (5); the lifting mechanism (7) is arranged on one side of the observation light path and is electrically connected with the control system (8), and the photometric measurement unit (4-1) is controlled to lift to a specified observation angle through the lifting mechanism (7). The light source (1) is arranged in the observation platform (5), light emitted by the light source (1) is incident on the measured sample (3) at a certain irradiation angle, the retro-reflected light of the measured sample (3) is firstly received by the luminosity measuring unit (4-1), and then the luminosity measuring unit (4-1) is controlled to ascend through the lifting mechanism (7), so that the retro-reflected light is received by the color measuring unit (4-2) at the rear side of the luminosity measuring unit (4-1), and further the measurement of the luminosity and the color characteristic of the retro-reflection of the measured sample (3) is realized. Fig. 1 is a schematic view, in an actual measurement process, the light source (1) irradiates the reference center of the measured sample (3) at a certain distance (e.g., 30.48m), and the distance between the light source (1) and the measured sample (3) can also be adjusted according to the measurement requirement.

Preferably, the device further comprises a rotation driving device (9) electrically connected with the control system (8), the sample stage (2) is connected with the rotation driving device (9), and the rotation driving device (9) is controlled by the control system (8) so as to control the sample (3) to be detected to rotate to a specified angle.

Preferably, the color measuring unit (4-2) further comprises an imaging lens (6), and the color measuring unit (4-2) receives the light beam from the sample (3) through the imaging lens (6).

Preferably, the light source (1) is a tungsten halogen lamp, a high intensity discharge lamp or an LED lamp, and the light source (1) has a built-in collimating light path for collimating light.

Preferably, the light source (1) is a dimmable LED formed by combining LEDs with more than one color. The light source (1) is electrically connected with a control system (8), and the control system (8) controls the light source (1) to emit light singly or in combination to irradiate on the sample (3) to be detected.

Preferably, the device also comprises a laser for aligning the position of the tested sample (3); the optical axis of the laser coincides with the optical axis of the emergent light of the light source, and the alignment (not shown in the figure) of the sample (3) to be measured and the light source (1) is carried out.

Preferably, the device also comprises a light blocking device (not shown in the figure) for preventing the light emitted by the light source (1) from being directly incident on the photometric unit (4-1) and/or the color measuring unit (4-2).

Claims

1. The retro-reflection measuring device is characterized by comprising a light source (1), a sample table (2) for placing a sample (3) to be measured, an observation table (5), a control system (8), a photometric measuring unit (4-1) and a color measuring unit (4-2) which are positioned on the observation table (5); the luminosity measuring unit (4-1) and the color measuring unit (4-2) are arranged on the observation platform (5); the light source (1) is arranged in the observation platform (5) or is independently arranged through the supporting frame, light emitted by the light source (1) is incident on the tested sample (3) at a certain irradiation angle, and retro-reflected light of the tested sample (3) is received by the luminosity measuring unit (4-1) and the color measuring unit (4-2), so that the measurement of the retro-reflected luminosity and the color characteristic of the tested sample (3) is realized.

2. A retro-reflection measuring apparatus according to claim 1, wherein a lifting mechanism (7) is provided on the observation stand (5), and the lifting mechanism (7) is electrically connected to a control system (8), and the photometric measuring unit (4-1) is mounted on the lifting mechanism (7), and the lifting of the lifting mechanism (7) controls the photometric measuring unit (4-1) to be lifted to a specified observation angle.

3. A retro-reflection measuring device according to claim 2, wherein the color measuring unit (4-2) is provided behind the photometric measuring unit (4-1); the retro-reflection light of the tested sample (3) firstly enters the luminosity measuring unit (4-1), the luminosity measuring unit (4-1) is controlled to ascend through the lifting mechanism (7), so that the retro-reflection light enters the color measuring unit (4-2) behind the luminosity measuring unit (4-1), and the measurement of the retro-reflection luminosity and the color characteristic of the tested sample (3) is realized.

4. A retro-reflection measuring apparatus according to claim 1, 2 or 3, further comprising a rotation driving device (9), wherein the sample stage (2) is connected to the rotation driving device (9), the rotation driving device (9) is electrically connected to the control system (8), and the rotation driving device (9) is controlled by the control system (8) to control the rotation of the sample (3) to a designated angle.

5. A retro-reflection measurement device according to claim 1, 2 or 3, wherein the color measurement unit (4-2) comprises an imaging lens (6), and the color measurement unit (4-2) receives the light beam from the sample (3) through the imaging lens (6).

6. A retro-reflection measurement device according to claim 5, wherein the color measurement unit (4-2) further comprises an alignment optical path, and a beam splitter is disposed in the optical path after the imaging lens (6), and the alignment optical path receives the light beam from the beam splitter.

7. A retro-reflection measurement device according to claim 1, 2 or 3, wherein the light source (1) is a tungsten halogen lamp or a high intensity discharge lamp or a LED lamp, and the light source (1) has a built-in collimating light path for collimating light.

8. A retro-reflection measurement device according to claim 1, 2 or 3, wherein the light source (1) is a dimmable LED with a combination of LEDs of more than one color.

9. A retro-reflection measurement device according to claim 8, wherein the light sources (1) are electrically connected to a control system (8), and the control system (8) controls the light sources (1) to emit light, individually or in combination, onto the sample (3) to be measured.

10. A retro-reflection measurement device according to claim 1, 2 or 3, further comprising light blocking means for preventing light emitted by the light source (1) from being directly incident on the photometric measuring unit (4-1) and/or the colour measuring unit (4-2).

11. A retro-reflection measurement device according to claim 1, 2 or 3, further comprising a laser for aligning the position of the sample (3) to be measured; and the optical axis of the laser coincides with the optical axis of emergent light of the light source.