CN104931231B - A kind of device and method of testing for being used to test light engine radiation parameter - Google Patents
A kind of device and method of testing for being used to test light engine radiation parameter Download PDFInfo
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- CN104931231B CN104931231B CN201510246108.3A CN201510246108A CN104931231B CN 104931231 B CN104931231 B CN 104931231B CN 201510246108 A CN201510246108 A CN 201510246108A CN 104931231 B CN104931231 B CN 104931231B
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Abstract
The invention discloses a kind of device and method of testing for being used to test light engine radiation parameter, hemispherical cavity including a closing, the radiator positioned at chamber central position, the hygrosensor being evenly distributed on cavity inner wall, two power meters being connected respectively with temperature heater and light engine to be measured and a potentiometer being connected with heat-flow meter, heat-flow meter and temperature heater are arranged on the lateral surface of radiator.By simulating the real operating environments of light engine and taking into full account the influence of convection current and radiation to environment temperature, realize the accurate measurement for treating light-metering engine radiation parameter and calculating, influence of the confined space to heat distribution is grasped, foundation is provided for designers and developers' analysis product heat dissipation characteristics, meets the contrast test needs of the different light engine radiation parameters under equal-wattage.
Description
Technical field
It is more particularly to a kind of to be used to testing the light engines such as LED and radiate in use ginseng the present invention relates to a kind of test device
Number distribution and the device and its method of testing of situation of change, belong to light fixture test equipment field.
Background technology
Because LED industry lacks unified and standard light, mechanical, electrical, hot interface, and each enterprise equipment facility, working foundation
With technical merit development it is unbalanced, cause various in the market LED illumination light engine species, different properties, interchangeability difference etc.
Shortcoming, the development to whole industry, which is brought, to have a strong impact on and challenges.
In recent years, association of the alliance ZHAGA being made up of the top LED manufacturers in the whole world has issued a set of LED light engine mark
Standard, it covers the main standards such as physical size, optics, electric, luminous intensity distribution, radiating, finally realizes different in ZHAGA alliances
The compatible and exchange of product between manufacturer.
For LED light engine in the application of reality, its reliability depends on radiating efficiency, meanwhile, in relative closure
LED light engine is used in space, its Temperature Distribution formed after radiating in space, temperature extreme difference, mean temperature etc. all can be to them
Middle electronic component or light engine cause significant impact in itself, can all lose product in bulk temperature or too high local temperature
Effect, causes reliability to reduce, product quality is severely impacted.
At present, do not have also directly against the measuring method of LED illumination product radiating efficiency.In actual production, LM-80 is utilized
Product is placed in high temperature, high humidity environment by method, and it is a kind of universal method to test its product failure rate and reliability.This side
Method is using more in other types of product, but this method is when measuring LED illumination product radiating efficiency, the high temperature residing for it
Environment make it that the radiating efficiency of heat abstractor has not been the key factor for determining product reliability, directly affects the survey of such product
The accuracy of examination.In addition, also have when being lighted using the instrument direct measurement light fixture such as thermocouple each point temperature on product, so as to
Radiator, the illuminating module back side, the temperature of light-emitting area when being worked to product, to judge radiating efficiency, exist because product generates heat
Inhomogeneities, this method can not accurately draw the parameters such as product heat radiation power, and for the follow-up heat of product in space
It is distributed and also has no way of learning, test result is severely limited.Also a kind of method used, that is, utilize the mode of software emulation
Simulation calculates heat radiation power, each point temperature and the space heat distribution of product, considers various factors to radiating to greatest extent
The influence of process, simulation reconstruction lighting process, although its mentality of designing and implementation are simple, conveniently, because of simulation process and
Temperature variations are complex, and analog simulation data and actual effect deviation are larger, and accuracy is poor.
Test process how is accurately realized, ensures the accuracy and integrality of the test of light engine radiation parameter, just turns into this
The subject matter solved is wanted in invention.
The content of the invention
In view of above-mentioned existing situation and deficiency, the present invention is intended to provide a kind of test mode is simple, effective, simulation process is accurate
Really, the real device and its method of testing for being used to test LED light engine radiation parameter.
In order to obtain light engine radiation parameter, it is necessary to being put down before and after product to heat radiation power, spatial temperature distribution, space
The parameters such as equal temperature carry out accurate measurement, and final data when being changed over time to above-mentioned parameter and reaching thermal balance is carried out
Record in detail, this just needs to design a specific device, and it must include power meter, heat-flow meter, photoradiometer, multi way temperature
The devices such as detector, therefore, the present invention is realized using following technical scheme：
It is a kind of to be used to testing the device of light engine radiation parameter, including the hemispherical cavity of closing and be evenly distributed on
Hygrosensor on cavity inner wall, the center of hemispherical cavity are provided with a radiator, on the lateral surface of radiator according to
It is secondary to be provided with heat-flow meter and temperature heater；Also include two power meters and a potentiometer, two power meters add with temperature respectively
Hot device is connected with light engine to be measured；The potentiometer is connected with heat-flow meter.
A kind of device for being used to test light engine radiation parameter, in addition to multiple photoradiometers, photoradiometer are used to measure
The radiation energy flux of light engine to be measured on the outside of hemispherical cavity.
The hygrosensor is uniformly distributed on hemispherical inwall with 45 degree of longitude interval, 30 degree of latitude interval；
Planar with 45 degree of progress radial direction divisions on wall, symmetrical 4 hygrosensors on each radial direction dividing line.
A kind of method of testing for being used to test light engine radiation parameter device, it is characterised in that specific steps include：
In step 1, measurement process, test environment temperature Ta is kept between [Ta-1 DEG C, Ta+1 DEG C]；
Step 2, by light engine to be measured by screw connection on temperature heater；
Step 3, opening temperature heater, power P0, after hygrosensor stable reading, read potentiometer reading V
(P0)；The hygrosensor stable reading refers to that temperature rise is less than 0.5% in 5 minutes；
Step 4, repeat the above steps 3, increase temperature heater power P every times, record after n times heat and correspond to respectively
Potentiometer reading V (P0+Ps), V (P0+2Ps), V (P0+NPs)；
Step 5, linear regression calculating is carried out to the power of temperature heater and the voltage of heat-flow meter, obtain power and voltage
Relation β(W/V)；
Step 6, closing temperature heater, after device cooling, light engine is opened, the company of reading after light engine temperature stabilization
The power meter being connected on light engine to be measured, obtain light engine power consumption Pe, meanwhile, read each temperature sensing in hemispherical cavity body
The number of degrees T of devicei, at interval of tsThe temperature T of time record at that timesi, treat TsiWhen stable, you can calculate the average temperature in cavity
Degree, maximum temperature difference and rendering space temperature distribution history；The light engine temperature and hygrosensor stable reading refer to 5 points
Temperature rise is less than 0.5% in clock；
Step 7, pass through integrating sphere or the optical radiation power P of photoradiometer measurement light engine1；
Step 8, the potentiometer reading V for reading heat-flow meter, i.e. the backward heat radiation power P of light enginer=V × β, treats light-metering
The forward direction heat radiation power P of enginer=Pe-P1-Pr, test process completion.
A kind of device and method of testing for being used to test light engine radiation parameter of the present invention, by simulating light engine
Real operating environments, consider that the influence of light-metering engine working environment is treated in convection current and radiation, utilize hygrosensor, heat-flow meter
The accurate measurement for treating light-metering engine radiation parameter and calculating are realized with photoradiometer, has obtained light engine in the course of work
Forward, backward heat radiation power, and the mean temperature of surrounding working environment, the temperature difference and spatial temperature profile, have been grasped close
Influence of the space to heat distribution is closed, foundation is provided for designers and developers' analysis product heat dissipation characteristics, preferably to design
Help is provided with using the illuminating product with light engine, the contrast of the different light engine radiation parameters of equal-wattage can be met
Test needs.
Brief description of the drawings
Fig. 1 is a kind of structural representation for being used to test the device of light engine radiation parameter of the present invention.
Embodiment
The center of the present invention is：For the use environment of fully simulation light engine, ensure the reasonability of test process and accurate
Property, and the integrality of test parameter, it is of the invention to be arranged on the simulation process of light engine in the environment of one relative closure, together
When, the influence that light radiation is brought to light engine itself and ambient temperature is taken into full account, to the forward and backward radiating work(of light engine
Rate accurately calculate and measure, so as to obtain an effective, reliable, comprehensive test result.Wherein, forward, backward is scattered
Thermal power just represents the heat dispersion of light engine to be measured.
A kind of 1 pair of device for being used to test light engine radiation parameter of the present invention is further retouched below in conjunction with the accompanying drawings
State：
A kind of device for being used to test light engine radiation parameter of the present invention, include the hemispherical cavity of a closing
8th, multiple hygrosensors 7, radiator 1, heat-flow meter 2, temperature heater 3, multiple photoradiometers, two power meters 6 and one
Individual potentiometer 5.
Multiple hygrosensors 7 are evenly distributed on the inwall of hemispherical cavity 8, wherein, the temperature on hemispherical inwall
Detector 7 is uniformly distributed with 45 degree of longitude interval, 30 degree of latitude interval；Planar the hygrosensor on wall is with 45 degree
Radial direction division is carried out, symmetrical 4 hygrosensors on each radial direction dividing line, so as in the closed-loop of hemispherical cavity 8
The collection of environment temperature parameter in any direction is realized in border, is become for environment mean temperature, the temperature difference, Temperature Distribution is calculated
The information such as change situation provide accurate foundation and conveniently.
Radiator 1 is arranged on the center of hemispherical cavity 8, and hot-fluid is connected with turn on the lateral surface of radiator 1
Meter 2 and temperature heater 3, light engine 4 to be measured are connected directly between on temperature heater 3 by screw, light engine 4 to be measured, temperature
Heater 3 and heat-flow meter 2 are located at the outside of hemispherical cavity 8, and radiator 1 treats the backward of light-metering engine 4 and carries out simulation radiating.
Two power meters 6 are connected with temperature heater 3 and light engine to be measured 4 respectively, and power meter 6 can displays temperature heater 3 at any time
With the power output of light engine 4 to be measured.Potentiometer 5 is connected on heat-flow meter 2, the real-time display in a manner of magnitude of voltage of potentiometer 5
Changes of heat flux situation.And the light engine to be measured 4 that multiple photoradiometers then uniformly correspond on the outside of hemispherical cavity, at any time measurement are treated
The radiation energy flux in the outside of light-metering engine 4, to eliminate light radiation process to environment temperature or the shadow of the power of light engine to be measured 4
Ring, improve the accuracy of simulation test process.The quantity of photoradiometer can be evenly distributed according to radiation event progress, accurate with energy
It is measured as standard, such as 2 conventional, 4,6 photoradiometers.
Below a kind of above-mentioned method of testing for being used to test the device of light engine radiation parameter is made further to retouch in detail
State, specific steps include：
Step 1, establish stable measuring environment, keep in measurement process test environment temperature Ta [Ta-1 DEG C, Ta+1
DEG C] between.
Step 2, by light engine to be measured by screw connection on temperature heater, light engine to be measured is realized by radiator
Backward external radiating.
Wherein, between radiator and light engine to be measured, temperature heater is used to imitate for temperature heater and heat-flow meter
Temperature-rise period, realize the demarcation for treating light-metering engine.Heat-flow meter is used to show electricity corresponding to temperature heater power at this temperature
Pressure, establish the corresponding relation of voltage and power, so that it may which the forward, backward heat radiation power that light engine to be measured is calculated for the later stage provides side
Help.
Step 3, opening temperature heater, power P0, after hygrosensor stable reading, read potentiometer reading V
(P0)；
In this step, the temperature environment of light engine to be measured is simulated by temperature heater, and then determine by heat-flow meter
The coefficient of relationship of light engine power and voltage to be measured.Wherein, hygrosensor stable reading refers to that temperature rise is less than in 5 minutes
0.5%.
Step 4, repeat the above steps 3, increase temperature heater power Ps, record corresponding electric respectively after n times heat
Pressure meter reading V (P0+Ps), V (P0+2Ps), V (P0+NPs), pass through the power and the electricity of heat-flow meter to temperature heater
Pressure carries out linear regression calculating, obtains the relation β of power and voltage(W/V)。
Step 5, closing temperature heater, after device cooling, carry out the actual radiation parameter test of light engine to be measured.
Step 6, light engine is opened, the power meter being connected on light engine to be measured is read after light engine temperature stabilization, is obtained
To light engine power consumption Pe, meanwhile, the number of degrees T of each hygrosensor in reading hemispherical cavity bodyi, at interval of tsTime records
Temperature T at that timesi, treat TsiWhen stable, you can calculate mean temperature, maximum temperature difference and the rendering space temperature in cavity
Distribution curve.
Wherein, light engine temperature and hygrosensor stable reading refer to that temperature rise is less than 0.5% in 5 minutes.Due to
Hygrosensor is evenly distributed in hemispherical cavity body, so, the temperature value for detecting to obtain represents each in hemispherical cavity body
The true temperature of position, so as to be provided accurately to calculate mean temperature, maximum temperature difference and rendering space temperature distribution history
Data foundation.
Step 7, pass through integrating sphere or the optical radiation power P of photoradiometer measurement light engine1。
For fully simulation lighting process, light radiation is avoided to being directly affected caused by environment temperature and light engine power, this
The uniform measurement of light engine radiant power to be measured is carried out in method using multiple photoradiometers, is eliminated irradiated in actual use
Journey directly affects to measurement result.
Step 8, the potentiometer reading V for reading heat-flow meter, the power being calculated with reference to preceding step and voltage relationship system
Number, i.e. the backward heat radiation power P of light enginer=V × β, and the forward direction heat radiation power P of light engine to be measuredr=Pc-P1-Pr。
Whole test and calculating process are completed.
Claims (4)
1. a kind of be used to test the device of light engine radiation parameter, it is characterised in that hemispherical cavity including closing and
The hygrosensor being evenly distributed on cavity inner wall, the center of the hemispherical cavity are provided with a radiator, radiating
Heat-flow meter and temperature heater are sequentially provided with the lateral surface of device；Also include two power meters and a potentiometer, it is described two
Power meter is connected with temperature heater and light engine to be measured respectively；The potentiometer is connected with heat-flow meter.
2. a kind of device for being used to test light engine radiation parameter according to claim 1, it is characterised in that also include more
Individual photoradiometer, the photoradiometer are used for the radiation energy flux for measuring the light engine to be measured on the outside of hemispherical cavity.
3. a kind of device for being used to test light engine radiation parameter according to claim 1 or 2, it is characterised in that described
Hygrosensor is uniformly distributed on hemispherical inwall with 45 degree of longitude interval, 30 degree of latitude interval；Planar on wall
With 45 degree of progress radial direction divisions, symmetrical 4 hygrosensors on each radial direction dividing line.
It is 4. a kind of based on any described test side for being used to test light engine radiation parameter device in the claims 1 to 3
Method, it is characterised in that specific steps include：
In step 1, measurement process, test environment temperature Ta is kept between [Ta-1 DEG C, Ta+1 DEG C]；
Step 2, by light engine to be measured by screw connection on temperature heater；
Step 3, opening temperature heater, power P0, after hygrosensor stable reading, read potentiometer reading V (P0)；
The hygrosensor stable reading refers to that temperature rise is less than 0.5% in 5 minutes；
Step 4, repeat the above steps 3, increase temperature heater power P every times, record voltage corresponding to distinguishing after n times heat
Count reading V (P0+Ps), V (P0+2Ps), V (P0+NPs)；
Step 5, linear regression calculating is carried out to the power of temperature heater and the voltage of heat-flow meter, obtain the pass of power and voltage
It is β(WV)；
Step 6, closing temperature heater, after device cooling, light engine is opened, reads and is connected to after light engine temperature stabilization
Power meter on light engine to be measured, obtain light engine power consumption Pe, meanwhile, read each hygrosensor in hemispherical cavity body
Number of degrees Ti, at interval of tsThe temperature T of time record at that timesi, treat TsiWhen stable, you can calculate mean temperature in cavity, most
The big temperature difference and rendering space temperature distribution history；The light engine temperature and hygrosensor stable reading referred in 5 minutes
Temperature rise is less than 0.5%；
Step 7, the optical radiation power P by photoradiometer measurement light engine1；
Step 8, the potentiometer reading V for reading heat-flow meter, i.e. the backward heat radiation power P of light enginer=V × β, light engine to be measured
Forward direction heat radiation power Pf=Pe-Pl-Pr, test process completion.
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| CN201510246108.3A CN104931231B (en) | 2015-05-15 | 2015-05-15 | A kind of device and method of testing for being used to test light engine radiation parameter |
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| CN104931231A CN104931231A (en) | 2015-09-23 |
| CN104931231B true CN104931231B (en) | 2017-12-01 |
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| US7318671B1 (en) * | 2004-09-23 | 2008-01-15 | Atec, Inc. | Heat-flux based emissivity/absorptivity measurement |
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| CN103630851A (en) * | 2013-12-09 | 2014-03-12 | 天津工大瑞工光电技术研究院有限公司 | Method and system for measuring entire thermal resistance of LED (light emitting diode) radiating module |
| CN103822940A (en) * | 2014-03-12 | 2014-05-28 | 南京航空航天大学 | Method and device for testing thermal performance of LED radiator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003017789A (en) * | 2001-06-29 | 2003-01-17 | Fujitsu Quantum Devices Ltd | Optical-module test apparatus and measurement method of optical module characteristics |
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2015
- 2015-05-15 CN CN201510246108.3A patent/CN104931231B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7318671B1 (en) * | 2004-09-23 | 2008-01-15 | Atec, Inc. | Heat-flux based emissivity/absorptivity measurement |
| CN101699240A (en) * | 2009-10-30 | 2010-04-28 | 中山大学 | Device and method for testing radiation performance of semiconductor lighting product |
| CN102680106A (en) * | 2012-05-21 | 2012-09-19 | 南京汉德森科技股份有限公司 | Photoelectric measurement method and device for utilizing thermocouple to monitor SSL (Secure Socket Layer) lighting products |
| CN102829860A (en) * | 2012-08-17 | 2012-12-19 | 重庆大学 | Device and method for quickly measuring space chromaticity and light distribution of lamp |
| CN103630851A (en) * | 2013-12-09 | 2014-03-12 | 天津工大瑞工光电技术研究院有限公司 | Method and system for measuring entire thermal resistance of LED (light emitting diode) radiating module |
| CN103822940A (en) * | 2014-03-12 | 2014-05-28 | 南京航空航天大学 | Method and device for testing thermal performance of LED radiator |
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