CN107132031B - LED maximum radiance measuring device - Google Patents
LED maximum radiance measuring device Download PDFInfo
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- CN107132031B CN107132031B CN201710388083.XA CN201710388083A CN107132031B CN 107132031 B CN107132031 B CN 107132031B CN 201710388083 A CN201710388083 A CN 201710388083A CN 107132031 B CN107132031 B CN 107132031B
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- 238000005259 measurement Methods 0.000 claims abstract description 60
- 238000013519 translation Methods 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 238000003384 imaging method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000000258 photobiological effect Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0242—Control or determination of height or angle information of sensors or receivers; Goniophotometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0403—Mechanical elements; Supports for optical elements; Scanning arrangements
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2604—Test of external equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention discloses a device for measuring the maximum radiance of an LED, which comprises: the system comprises a movable optical platform module, a brightness measurement module, an illuminance feedback measurement module and a control module. The movable optical platform module comprises four sub-modules: the device comprises an electric rotating platform, an electric translation platform, a first stepping motor driving module and a second stepping motor driving module; the central axes of the electric rotating table and the electric translating table are positioned on the same straight line; the detected LED is arranged on the electric rotating table; the brightness measuring module and the illuminance feedback measuring module are arranged on the electric translation table, and the forefront end of the lens of the brightness measuring module and the illuminance feedback measuring module are positioned in the same spatial vertical plane; the control module is connected with the movable optical platform module and the illuminance feedback measurement module in a wired mode. The invention greatly simplifies the maximum radiance measuring system in the LED blue light hazard measurement.
Description
Technical Field
The present invention relates to an optical radiation measuring device, and more particularly, to an LED maximum radiance measuring device.
Background
Light sources and fixtures are closely related to human life, but improper exposure of lighting products can create multiple photo-biological hazards. With the widespread popularity of LED lighting fixtures, people are increasingly focusing on the photo-biological safety that such LED light sources are distinguished from "blue hazard". Manufacturers of LED light sources are in urgent need of a convenient detection instrument to finish the authentication of the safety hazard of blue light, and consumers want to be able to rapidly detect whether the illumination environment in which they are located is safe or not through the relevant instrument. However, the photo-biological safety detection instrument developed according to the related standard is used for carrying out all kinds of photo-biological safety tests on any type of lamp, so that the photo-biological safety detection instrument has the defects of large volume, low speed, inconvenience in daily use and the like.
The invention relates to an LED maximum radiance measuring device which is mainly used for detecting the maximum effective radiance of an LED in a rapid detection method of LED blue light hazard. Because in the LED blue hazard detection method, the measurement of the maximum effective radiance of the LED is required, two problems are involved: firstly, the direction of the maximum radiance generated by the LED needs to be searched, so that the LED faces to the lens of the brightness meter; secondly, it is prescribed in national standards that in the direction of the maximum radiance generated by the LED, the radiance of the LED needs to be detected at the position where the LED generates 500lx illuminance. The LED maximum radiance measuring device fully utilizes the characteristic that the light distribution curve of the LED is generally symmetrical, can greatly simplify a maximum radiance measuring system in LED blue light hazard measurement, and realizes quick and convenient measurement of the maximum radiance of the LED.
Disclosure of Invention
The invention aims to solve the two problems of searching the direction of the maximum radiance generated by an LED and measuring the LED radiance at the position of the LED generating 500lx illuminance in the LED blue light hazard measurement, and provides a simplified, rapid and convenient LED maximum radiance measuring device.
In order to achieve the above purpose, the invention adopts the following technical scheme:
1. an LED maximum radiance measurement device, the device comprising: a movable optical platform module (1) comprising four sub-modules: the device comprises an electric rotating platform 1-1, an electric translation platform 1-2, a first stepping motor driving module 1-3, a second stepping motor driving module 1-4, a brightness measuring module 2, an illuminance feedback measuring module 3 and a control module 4. The central axes of the electric rotating platform 1-1 and the electric translating platform 1-2 are positioned on the same straight line; the detected LEDs are arranged on the electric rotating table 1 and rotate synchronously at the same angle with the electric rotating table 1-1; the brightness measurement module 2 and the illuminance feedback measurement module 3 are arranged on the electric translation table 1-2, move synchronously with the electric translation table 1-2 in the same stroke, and the forefront end of a lens of the brightness measurement module 2 and the illuminance feedback measurement module 3 are arranged in the same spatial vertical plane, are closely adjacent and side by side and are perpendicular to the direction of the detected light; the electric rotating platform 1-1 carries the detected LEDs to rotate in space at certain angle intervals, after the light emitted by the detected LEDs at certain angle is detected by the illuminance feedback measurement module 3, the electric rotating platform 1-2 is controlled to move to the position where 500lx illuminance is generated according to illuminance feedback, and the brightness measurement module 2 measures the brightness of the detected LEDs; the first stepping motor driving module 1-3 controls the rotation direction and the rotation angle of the electric rotating table 1-1 and is connected with a power supply system; the second stepping motor driving module 1-4 controls the moving direction and the travel of the electric translation stage 1-2 and is connected with a power supply system; the control module 4 collects the illuminance value measured by the illuminance feedback measurement module 3, sends control information to the first stepping motor driving module 1-3 and the second stepping motor driving module 1-4, and is connected with a power supply system.
2. The minimum stepping angle of the electric rotating table 1-1 is 1 DEG, and the electric rotating table can continuously rotate in the clockwise or anticlockwise direction.
3. The minimum stepping distance of the electric translation table 1-2 is 0.2mm, and the maximum stroke is not less than 200mm.
4. The stepping motor driving modules 1-3 and 1-4 adopt stepping motor driving chips, the working voltage is 10V-35V, and the output current is not more than 3A.
5. The brightness measurement module 2 adopts an imaging radiance meter, and the measurement wavelength range covers 300-700nm.
6. The illuminance feedback measurement module 3 adopts a digital light intensity sensor, and the illuminance measurement range covers 0-65535lx.
7. The control module 4 adopts a singlechip or an FPGA.
The invention has the advantages that:
1. the method aims at the detection of the radiance in the blue light hazard of the LED, and is convenient to operate and high in detection speed;
2. the basic equipment is quite common, no special processing is needed, and the total cost of the measuring device is reduced;
3. the measuring device can expand the measurement of other optical parameters, such as photometry parameters of irradiance, brightness, illumination, color temperature, color coordinates and the like, and realize a set of multiple purposes.
Drawings
Fig. 1 is a diagram showing the positional relationship and information relationship between main measuring instruments of the present invention.
FIG. 2 is a diagram of a movable optical platform module and its sub-modules according to the present invention.
Fig. 3 is a diagram showing a relationship between a power supply system and related modules according to the present invention.
Fig. 4 is a schematic diagram of a position between the electric rotating table and the electric translating table and a position between the brightness measuring module and the illuminance measuring module according to the present invention.
Fig. 5 is a schematic diagram illustrating a position between a brightness measurement module and an illuminance measurement module according to the present invention.
In the figure, 1 represents a movable optical platform module, 1-1 represents an electric rotating platform, 1-2 represents an electric translation platform, 1-3 represents a first stepping motor driving module, 1-4 represents a second stepping motor driving module, 2 represents a brightness measuring module, 3 represents an illuminance feedback measuring module, and 4 represents a control module.
Detailed Description
The invention will now be further described with reference to the drawings and detailed description, which are given by way of illustration only and not as limitation.
According to the experimental instrument or equipment related to the LED maximum radiance measuring device shown in fig. 1 and 2, the experimental instrument or equipment comprises a movable optical platform module 1, a brightness measuring module 2, an illuminance feedback measuring module 3 and a control module 4, wherein the movable optical platform module comprises an electric rotary table 1-1, an electric translation table 1-2, a first stepping motor driving module 1-3 and a second stepping motor driving module 1-4. The LED light source to be detected is required to be placed on the electric rotating table 1-1 and synchronously rotates at the same angle with the electric rotating table; the brightness measuring module 2 and the illuminance feedback measuring module 3 are required to be placed on the electric translation stage 1-2 and move synchronously with the electric translation stage in the same stroke. The control module 4 is connected with the electric rotating table 1-1, the electric translation table 1-2 and the illuminance feedback measurement module 3 through circuits, receives illuminance information measured by the illuminance feedback measurement module 3, and controls the moving direction, angle or travel of the electric rotating table 1-1 and the electric translation table 1-2.
According to fig. 3, the electric rotating table 1-1 needs to be connected with the first stepping motor driving module 1-3, and the electric translating table 1-2 needs to be connected with the second stepping motor driving module 1-4. The power supply system supplies power to the first stepping motor driving module 1-3, the second stepping motor driving module 1-4 and the control module 4 respectively.
According to fig. 4, the central axes of the electric rotating table 1-1 and the electric translating table 1-2 are positioned on the same straight line, and the illumination feedback measurement module 3 and the forefront end of the lens of the brightness measurement module 2 are positioned in the same spatial vertical plane.
According to fig. 5, the lenses of the illuminance feedback measurement module 3 and the brightness measurement module 2 should be arranged next to each other and perpendicular to the direction of the detected light.
The following takes a typical equipment type and application scenario as an example, and specifically analyzes the usage of the LED maximum radiance measuring device.
In a typical application scenario, the device in the movable optical platform module 1, the electric rotary table 1-1 adopts a ZT201ER100 electric rotary table, the electric translational table 1-2 adopts a CBX1204-100 electric translational table, and the first stepping motor driving module 1-3 and the second stepping motor driving module 1-4 both adopt TB6560 stepping motor driving plates. The brightness measurement module 2 adopts a Kenican Meinada LS150 handheld brightness meter, and can directly read the measured brightness value. The illuminance feedback measurement module 3 employs a digital light intensity sensor BH1750FVI illuminance detection module. The control module 4 adopts an AT89051 singlechip to develop a board suite and is used for controlling the movement of the movable optical platform module and reading and displaying the illuminance value detected by the illuminance module.
LEDs typically emit light in a 2 pi space, and therefore, only the maximum radiance of an LED needs to be measured in this 2 pi space.
The measurement process is divided into a primary mode and a precise mode.
The primary measurement mode steps are as follows:
1. and overlapping the 0-degree angle of the space of 2 pi where the LED light emitting surface is positioned with the center line of the translation table and the rotary table.
2. At this time, the illuminance of the light source is detected by the illuminometer, if the illuminance is less than 490lx, the translation stage is moved 20mm towards the direction approaching the rotating table, if the illuminance is more than 510lx, the translation stage is moved 20mm away from the rotating table until the measured illuminance is within the range of 490lx-510lx, the translation stage is not moved any more, and the brightness value of the light source detected by the brightness meter at this time is recorded.
3. And (3) rotating the LED by 10 degrees towards the space direction of 2 pi where the light emitting surface is positioned, and repeating the step (2) until the measurement in the space of 2 pi is completed.
At this time, brightness values every 10 ° in the 2π space have been recorded.
The accurate measurement mode steps are as follows:
1. and overlapping the angle corresponding to the lower limit of the angle interval of 10 DEG with the angle of the brightness peak value measured in the primary measurement mode as the center with the center lines of the translation stage and the rotary stage.
2. At this time, the illuminance of the light source is detected by the illuminometer, if the illuminance is less than 500lx, the translation stage is moved 2mm towards the direction approaching the rotary table, if the illuminance is more than 500lx, the translation stage is moved 2mm away from the rotary table until the measured illuminance is 500lx, the translation stage does not move any more, and the brightness value of the light source detected by the brightness meter at this time is recorded.
3. The LED is rotated by 1 DEG towards the upper limit direction of the angle interval of 10 DEG with the angle of the brightness peak value measured in the primary measurement mode as the center, and the step 2 is repeated until the measurement in the angle interval of 10 DEG is completed.
4. If a plurality of brightness peaks are detected in the preliminary measurement mode, repeating the steps 1-3 corresponding to each brightness peak, and comparing the maximum brightness in the measurement result to obtain the maximum brightness of the LED.
And after the maximum value of the LED brightness is obtained by measurement, calculating the maximum value of the LED radiance according to the visual efficiency function.
While the invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that the present invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a maximum radiance measuring device of LED, includes movable optical platform module (1) that contains electronic revolving stage (1-1), electronic translation platform (1-2), first step motor drive module (1-3) and second step motor drive module (1-4), luminance measurement module (2), illuminance feedback measurement module (3), control module (4), its characterized in that:
the central axes of the electric rotating platform (1-1) and the electric translating platform (1-2) are positioned on the same straight line; the detected LEDs are arranged on the electric rotating table (1-1) and rotate synchronously at the same angle with the electric rotating table (1-1); the brightness measurement module (2) and the illuminance feedback measurement module (3) are arranged on the electric translation table (1-2) and move synchronously along the same stroke with the electric translation table (1-2), and the forefront end of a lens of the brightness measurement module (2) and the illuminance feedback measurement module (3) are positioned in the same spatial vertical plane, are closely adjacent and arranged side by side and are perpendicular to the direction of detected light rays; the electric rotating platform (1-1) carries the detected LEDs to rotate in a space at certain angle intervals, after the light emitted by the detected LEDs at a certain angle is detected by the illuminance feedback measurement module (3), the electric rotating platform (1-2) is controlled to move to the position generating 500lx illuminance according to illuminance feedback, and the brightness measurement module (2) measures the brightness of the detected LEDs at the position; the first stepping motor driving module (1-3) controls the rotation direction and the rotation angle of the electric rotating table (1-1) and is connected with a power supply system; the second stepping motor driving module (1-4) controls the moving direction and the travel of the electric translation table (1-2) and is connected with a power supply system; the control module (4) collects the illuminance value measured by the illuminance feedback measurement module (3), sends control information to the first stepping motor driving module (1-3) and the second stepping motor driving module (1-4), and is connected with the power supply system.
2. The LED maximum radiance measurement device of claim 1, wherein: the minimum stepping angle of the electric rotating table (1-1) is 1 DEG, and the electric rotating table can continuously rotate in the clockwise or anticlockwise direction.
3. The LED maximum radiance measurement device of claim 1, wherein: the minimum stepping distance of the electric translation table (1-2) is 0.2mm, and the maximum stroke is not less than 200mm.
4. The LED maximum radiance measurement device of claim 1, wherein: the first stepping motor driving module (1-3) and the second stepping motor driving module (1-4) adopt stepping motor driving chips, the working voltage is 10V-35V, and the output current is not more than 3A.
5. The LED maximum radiance measurement device of claim 1, wherein: the brightness measurement module (2) adopts an imaging radiance meter, and the measurement wavelength range covers 300-700nm.
6. The LED maximum radiance measurement device of claim 1, wherein: the illuminance feedback measurement module (3) adopts a digital light intensity sensor, and the illuminance measurement range covers 0-65535lx.
7. The LED maximum radiance measurement device of claim 1, wherein: the control module (4) adopts a singlechip or an FPGA.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720061435 | 2017-01-19 | ||
| CN2017200614356 | 2017-01-19 |
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| CN107132031A CN107132031A (en) | 2017-09-05 |
| CN107132031B true CN107132031B (en) | 2023-05-05 |
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| CN201720603948.5U Withdrawn - After Issue CN206804279U (en) | 2017-01-19 | 2017-05-27 | LED maximum spoke brightness measuring device for camera |
| CN201710388083.XA Active CN107132031B (en) | 2017-01-19 | 2017-05-27 | LED maximum radiance measuring device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206804279U (en) * | 2017-01-19 | 2017-12-26 | 中国科学院上海技术物理研究所 | LED maximum spoke brightness measuring device for camera |
| CN108195569B (en) * | 2017-12-08 | 2020-08-18 | 杭州浙大三色仪器有限公司 | Headlamp illuminance detection method |
| CN109459212A (en) * | 2018-11-07 | 2019-03-12 | 常州工学院 | A kind of LED life appraisal procedure based on blue light harm |
| CN110095261B (en) * | 2019-04-01 | 2021-08-20 | 南京巨鲨显示科技有限公司 | Blue light detection device and method for medical display |
| CN111504611B (en) * | 2020-04-24 | 2022-04-19 | 嘉兴市加宇电器科技有限公司 | LED illuminating lamp brightness detection device and use method thereof |
| CN112187992A (en) * | 2020-09-28 | 2021-01-05 | 广东产品质量监督检验研究院（国家质量技术监督局广州电气安全检验所、广东省试验认证研究院、华安实验室） | Method for testing blue light of mobile phone |
| WO2022109831A1 (en) * | 2020-11-25 | 2022-06-02 | 苏州康孚智能科技有限公司 | Brightness detection device for noctilucent textile |
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| CN107132031A (en) | 2017-09-05 |
| CN206804279U (en) | 2017-12-26 |
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