CN105675264A - Test method for luminous flux of LED light strings - Google Patents
Test method for luminous flux of LED light strings Download PDFInfo
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- CN105675264A CN105675264A CN201610040679.6A CN201610040679A CN105675264A CN 105675264 A CN105675264 A CN 105675264A CN 201610040679 A CN201610040679 A CN 201610040679A CN 105675264 A CN105675264 A CN 105675264A
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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
- G01M11/02—Testing optical properties
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Abstract
The invention discloses a test method for the luminous flux of LED light strings. The test method comprises the following steps that 1) test samples are classified according to the light source structure of the light strings, the light strings whose light sources are separated independent units are first type of light strings, and the light strings in which LEDs are assembled on a flexible circuit board or a PCB hard board are second type of light strings; 2) that change of the luminous flux is lower than 0.5% in 30 minutes is set as the stable test condition for the LED light strings, and test is carried out after the condition is satisfied; and 3) for the first type of light strings, light sources of the LED light strings include LED lamps or LED modules connected to a lead in series or parallel, and an integrating sphere system tests the luminous flux of the single LED lamp or module independently; and for the second type of light strings, the test samples are selected in a sample pretreatment method, and a tool is selected for luminous flux test according to the light emitting type. Thus, the luminous flux of the LED light strings can be effectively tested to evaluate the energy efficiency, the operability is high, and the test method is high in evaluation accuracy and repeatability.
Description
Technical field
The present invention relates to LED string performance test field, specifically the method for testing of a kind of LED optical crosstalk flux.
Background technology
Development along with solid state illumination technology, LED promotes rapidly in technology and performance, the illuminating effect of same or higher quality can be provided, and it is more energy-conservation to compare traditional lighting light fixture so that it is be more widely applied in fields such as indoor and outdoor general lighting, decorative lighting, Landscape Lightings. On current market, because of LED light source have energy-conservation, life-span is long, the advantages such as heating is few, the lamp string using LED light source replaces the lamp string of conventional light source gradually, become the major product in lamp string market, and the purposes of LED string is also used not only as decoration and Landscape Lighting, its expanded range being suitable for is to the street illumination on environment, bridge, stadium and airport, the architectural lighting of school, hospital, ancient building, church and company, the field such as the local lighting needed for the environment such as market, family be double; two stops, stage, exhibition.
For promoting the sound development of China's LED illumination Energy Saving Industry, promote energy-saving and emission-reduction, improve the quality level of LED illumination product, real its efficient, energy-conservation feature of embodiment, CQC (CQC) has released LED road/tunnel lamp, LED down, the energy-conservation certification of the products such as self-ballasted LED. But in life, it is widely used LED string product also and excludes the scope of energy-conservation certification. Along with widely using of LED string, the assessment of LED string efficiency level also should be become the concern main points detecting work. And the assessment of LED string efficiency level it is critical only that the test of LED optical crosstalk flux, therefore it provides the method for testing of a kind of LED optical crosstalk flux seems extremely urgent.
Summary of the invention
In view of this, the technical problem to be solved is, thering is provided the method for testing of the LED optical crosstalk flux that a kind of operability is good, evaluation accuracy is high, reproducibility is good, the LED optical crosstalk flux existed to solve prior art tests the technical problem with energy efficiency evaluation.
The technical solution of the present invention is to provide the method for testing of the LED optical crosstalk flux of a kind of following steps, comprises the following steps:
1) test sample classification: be divided into by sample according to lamp optical crosstalk source structure: the light source in lamp string is the separate unit that separates as first kind lamp string, is assembled in LED on flexible circuit board or PCB hardboard as Equations of The Second Kind lamp string using LED;
2) arranging the steady state test condition of LED string: in 30 minutes, light flux variations is less than 0.5%; Test again after reaching above-mentioned condition;
3) for first kind lamp string, the light source in LED string is all the LED on wire in series or in parallel or LED module, integration sphere light source system individually single led lamp or module are carried out luminous flux test; For Equations of The Second Kind lamp string, then adopt sample pretreating method to carry out test sample and choose, and according to emission type, select integration sphere light source system or distribution photometer to carry out luminous flux test;
Described sample pretreating method is: running voltage work intact sample specified according to manufacturer, after working stability, according to the electrical structure of LED string, selects position measurement one section representative in sample;
Length is chosen according to the measurement device used, length selection principle:
To distribution photometer: length measured by sample need to less than the maximum of near field light flux measurement length.
To integrating sphere measurement system: length measured by sample need to less than the 1/2 of integrating sphere diameter.
Measure testing sample electrical quantity, obtain the circuit structure of LED string part to be measured according to the circuit diagram of LED string, measured operating current or the running voltage of this section of LED by oscillograph or digital multimeter, and record related data;
Repeat above-mentioned sample pretreating method step, intercept sample, choose some sections of testing samples.
Adopt above step, the present invention compared with prior art has the advantage that each step of the present invention, two kinds of LED strings are made a distinction, and have employed different method of testing, step and instrument, in particular for Equations of The Second Kind lamp string, before test, sample is carried out special pretreatment, and the emission type according to lamp string selects suitable testing tool, the present invention provides a kind of method of Validity Test LED optical crosstalk flux, for assessment efficiency, operability is good, and can be used for energy-conservation certification, and this method of testing evaluation accuracy is high, reproducibility is good.
As improvement, the emission type according to LED string, is 4 π spaces and two types that light radiation angle is 2 π spaces including light radiation angle; For the LED in emission type to be light radiation angle be 2 π spaces, measurement bar need to be made, use metal bar, and be the BaSO of 95% with reflectance4Material uniformly sprays on metal bar surface, and testing sample is wrapped in the surface of metal bar, and sample light-emitting area is outside, adopts integration sphere light source system to measure luminous flux. Being measured the mode of bar by making, be wound and test, test is more stable and accurate.
As improvement, for with the LED string controlling device, there is luminous controlled and flicker function, then all test for each pattern, the selection of integration sphere light source system method of testing is consistent with the LED string of continuous luminous, but photometer herein then adopts rapid photometer, described rapid photometer to adopt high-speed sampling photometric measure system, configuration optical flare test special-purpose software. This step further defines the Method and kit for of test for the lamp string with flashing function, promotes test accuracy further.
As improvement, setting measurement environment: LED optical crosstalk flux measurement is 25 DEG C ± 1 DEG C in ambient temperature, maximum relative humidity be the wind without convection current of 65% environment in carry out, when sampling reading without air flowing near LED string; Air pressure: 86kPa～106kPa. Environment has material impact for test, is therefore defined necessary for environmental condition, direct correlation test effect.
As improvement, power supply output voltage or electric current or power stability within the scope of the load voltage value of ± 0.2%. Further define the requirement of power supply.
Detailed description of the invention
With regard to specific embodiment, the invention will be further described below, but the present invention is not restricted to these embodiments.
The present invention contains any replacement, amendment, equivalent method and scheme made in the spirit and scope of the present invention. Understand thoroughly to make the public that the present invention to be had, present invention below preferred embodiment describes in detail concrete details, and does not have the description of these details can also understand the present invention completely for a person skilled in the art.
The method of testing of the LED optical crosstalk flux of the present invention, comprises the following steps:
1) test sample classification: be divided into by sample according to lamp optical crosstalk source structure: the light source in lamp string is the separate unit that separates as first kind lamp string, is assembled in LED on flexible circuit board or PCB hardboard as Equations of The Second Kind lamp string using LED;
2) arranging the steady state test condition of LED string: in 30 minutes, light flux variations is less than 0.5%; Test again after reaching above-mentioned condition;
3) for first kind lamp string, the light source in LED string is all the LED on wire in series or in parallel or LED module, integration sphere light source system individually single led lamp or module are carried out luminous flux test; For Equations of The Second Kind lamp string, then adopt sample pretreating method to carry out test sample and choose, and according to emission type, select integrating sphere measurement system or distribution photometer to carry out luminous flux test;
Described sample pretreating method is: running voltage work intact sample specified according to manufacturer, after working stability, according to the electrical structure of LED string, selects position measurement one section representative in sample;
Length is chosen according to the measurement device used, length selection principle:
To distribution photometer: length measured by sample need to less than the maximum of near field light flux measurement length.
To integrating sphere measurement system: length measured by sample need to less than the 1/2 of integrating sphere diameter.
Measure testing sample electrical quantity, obtain the circuit structure of LED string part to be measured according to the circuit diagram of LED string, measured operating current or the running voltage of this section of LED by oscillograph or digital multimeter, and record related data;
Repeat above-mentioned sample pretreating method step, intercept sample, choose some sections of testing samples.
For first kind lamp string sample, the light source in LED string is all the LED on wire in series or in parallel or LED module, and single led lamp or module can individually be tested by this sample. For this type of sample characteristics of for example, choose integrating sphere measurement system and test.
According to emission type, light radiation angle is the center that the lamp string sample in 4 π spaces is placed in integrating sphere measurement system, use as far as possible and calibrate integrating photometer/integration spectral radiometer with LED or the LED module of type as lumen standard lamp, after meeting steady state measurement condition, start to measure, measuring 5 samples, and calculate meansigma methods, the meansigma methods of measurement is
According to emission type, light radiation angle is the lamp string in 2 π spaces, sample irradiating luminous flux without issue, now at the lateral opening of integrating sphere measurement system, can be measured as lateral orifices place by sample, measure 5 samples, and calculate meansigma methods, and the meansigma methods of measurement is
The then total light flux of complete LED stringFor:
N: the quantity of LED or LED module in lamp string
For Equations of The Second Kind sample, need first sample to be carried out test sample by the method for sample pretreatment and choose.
The center of integrating sphere measurement system should be placed in for first kind sample, use the LED with type to calibrate as the fluorescent tube that lumen standard lamp or size are similar, as far as possible after meeting steady state measurement condition, start to measure, measuring 5 samples, and calculate meansigma methods, the meansigma methods of measurement is
According to emission type, light radiation angle is 2 π spaces, and sample size is relatively big, then choose distribution photometer measurement. On the fixture of the distribution photometer fixed by sample, and making light-emitting area straight down, be that sample is powered by electrical quantity measured in pretreatment, after meeting steady state measurement condition, start to measure, measure 5 samples, and calculate meansigma methods, the meansigma methods of measurement is
The then total light flux of complete LED stringFor:
N:LED light bar total length/sample length
With the LED string controlling device, its luminescence is controlled, has the function of flicker. The pattern of flicker is various, and reply each pattern is all tested. Above method is used equally to have the sample of flashing function and measures, but photometer herein should be replaced by rapid photometer, and this photometric sample frequency should be greater than the flicker frequency of measured sample, coordinate special sampling software, measuring 5 samples, and calculate meansigma methods, the meansigma methods of measurement is
The then total light flux of complete LED stringFor:
N: the quantity of LED or LED module/LED total length/sample length in lamp string.
According to the division of emission type, light radiation angle is the LED in 2 π spaces, carries out the measurement of this type of LED, need to make a simple measurement bar. Choosing a length is 0.6m, and diameter is the metal bar of 20mm, and is the BaSO of 95% with reflectance4Material uniformly sprays on metal bar surface. Testing sample is wrapped in the surface of metal bar, and sample light-emitting area is outside, and is wound around without excessively tight. After completing, sample is positioned over the center of integrating sphere measurement system, uses the LED with type to calibrate as the fluorescent tube that lumen standard lamp or size are similar, as far as possible after meeting steady state measurement condition, start to measure, measuring 5 samples, and calculate meansigma methods, the meansigma methods of measurement is
The then total light flux of complete LED stringFor:
N:LED light bar total length/sample length.
The tool parameters related in the present invention is:
Described distributed luminosity is calculated as the quick distribution photometer of the total space: be positioned at the luminosity probe of near-field probe, the full accuracy that the CIE84-1989 illumination integration method recommended realizes total light flux can be used to measure, luminosity probe precision: CLASSL, f1 ' < 1.5%.
Integrating sphere measurement system is integrating sphere spectrogrph test system: ball wall has survey perforate, as light well and the receiver hole placing light receiving element. Accuracy: ± 1%
Rapid photometer: adopt high-speed sampling photometric measure system, configuration optical flare test special-purpose software.
It is described as far as preferred embodiment of the present invention above, but is not to be construed as limitations on claims. The present invention is not only limited to above example, and its concrete structure allows to change. In a word, all various changes made in the protection domain of independent claims of the present invention are all in protection scope of the present invention.
Claims (5)
1. the method for testing of a LED optical crosstalk flux, it is characterised in that: comprise the following steps:
1) test sample classification: be divided into by sample according to lamp optical crosstalk source structure: the light source in lamp string is the separate unit that separates as first kind lamp string, is assembled in LED on flexible circuit board or PCB hardboard as Equations of The Second Kind lamp string using LED;
2) arranging the steady state test condition of LED string: in 30 minutes, light flux variations is less than 0.5%; Test again after reaching above-mentioned condition;
3) for first kind lamp string, the light source in LED string is all the LED on wire in series or in parallel or LED module, integration sphere light source system individually single led lamp or module are carried out luminous flux test; For Equations of The Second Kind lamp string, then adopt sample pretreating method to carry out test sample and choose, and according to emission type, select integration sphere light source system or distribution photometer to carry out luminous flux test;
Described sample pretreating method is: running voltage work intact sample specified according to manufacturer, after working stability, according to the electrical structure of LED string, selects position measurement one section representative in sample;
Length is chosen according to the measurement device used, length selection principle:
To distribution photometer: length measured by sample need to less than the maximum of near field light flux measurement length.
To integrating sphere measurement system: length measured by sample need to less than the 1/2 of integrating sphere diameter.
Measure testing sample electrical quantity, obtain the circuit structure of LED string part to be measured according to the circuit diagram of LED string, measured operating current or the running voltage of this section of LED by oscillograph or digital multimeter, and record related data;
Repeat above-mentioned sample pretreating method step, intercept sample, choose some sections of testing samples.
2. the method for testing of LED optical crosstalk flux according to claim 1, it is characterised in that: the emission type according to LED string, is 4 π spaces and two types that light radiation angle is 2 π spaces including light radiation angle; For the LED in emission type to be light radiation angle be 2 π spaces, measurement bar need to be made, use metal bar, and be the BaSO of 95% with reflectance4Material uniformly sprays on metal bar surface, and testing sample is wrapped in the surface of metal bar, and sample light-emitting area is outside, adopts integration sphere light source system to measure luminous flux.
3. the method for testing of LED optical crosstalk flux according to claim 1 and 2, it is characterized in that: for the LED string controlling device, there is luminous controlled and flicker function, then all test for each pattern, the selection of integration sphere light source system method of testing is consistent with the LED string of continuous luminous, but photometer herein then adopts rapid photometer, described rapid photometer to adopt high-speed sampling photometric measure system, configuration optical flare test special-purpose software.
4. the method for testing of LED optical crosstalk flux according to claim 3, it is characterized in that: setting measurement environment: LED optical crosstalk flux measurement is 25 DEG C ± 1 DEG C in ambient temperature, maximum relative humidity be the wind without convection current of 65% environment in carry out, sample reading time LED string near without air flowing; Air pressure: 86kPa～106kPa.
5. the method for testing of LED optical crosstalk flux according to claim 4, it is characterised in that: power supply output voltage or electric current or power stability within the scope of the load voltage value of ± 0.2%.
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| CN110146131A (en) * | 2019-06-12 | 2019-08-20 | 佛山市南海区联合广东新光源产业创新中心 | A kind of LED lamp product evaluation test method |
| CN111289227A (en) * | 2020-03-20 | 2020-06-16 | 江西照世科技有限公司 | LED lamp string detector based on Internet of things |
| CN115656764A (en) * | 2022-12-27 | 2023-01-31 | 聚灿光电科技（宿迁）有限公司 | Illumination quality detection method for light-emitting diode |
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Application publication date: 20160615 |