CN102967448A - LED (Light Emitting Diode) performance test box, calibrating method and performance test method - Google Patents
LED (Light Emitting Diode) performance test box, calibrating method and performance test method Download PDFInfo
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- CN102967448A CN102967448A CN2012104715837A CN201210471583A CN102967448A CN 102967448 A CN102967448 A CN 102967448A CN 2012104715837 A CN2012104715837 A CN 2012104715837A CN 201210471583 A CN201210471583 A CN 201210471583A CN 102967448 A CN102967448 A CN 102967448A
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- 238000011056 performance test Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000013307 optical fiber Substances 0.000 claims abstract description 22
- 238000002955 isolation Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 28
- 230000005540 biological transmission Effects 0.000 abstract 5
- 230000033001 locomotion Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The invention discloses an LED (Light Emitting Diode) performance test box, a calibrating method and a performance test method. The test case comprises a box body, a motor and a light taking device, and also comprises a transmission mechanism and an optical fiber, wherein the box body is provided with an opening, and the transmission mechanism and the optical fiber pass through the opening; the light taking device is arranged inside the box body, and the motor is arranged outside the box body; one end of the transmission mechanism is connected with a shaft of the motor, and the other end the transmission mechanism is connected with the light taking device; the motor drives the light taking device to move in the box body through the transmission mechanism; and a first end of the optical fiber is connected with the light taking device, and a second end of the optical fiber is outside the box body. The LED performance test box is simple in structure, and easy and simple to operate, and can detect LED performance parameters on line.
Description
Technical field
The present invention relates to the LED field tests, be specifically related to a kind of LED performance test case, scaling method and performance test methods.
Background technology
At present current LED reliability test method is: same model, with batch the LED product in, extracting the sample of some tests, measure its performance parameter, the LED life-span of extrapolating this model, this batch according to corresponding life-span algorithm before test and in the process of the test.Because the theoretical life-span of LED reaches tens thousand of hours, therefore need to adopt the strenuous test method of strengthening stress to accelerate whole process of the test.
In order to raise the efficiency and the Optimum Experiment result, common practice is simultaneously a plurality of LED samples to be carried out fail-test.Pallet of common sampling in the existing LED reliability test system, fix a plurality of LED samples at this pallet, again whole pallet is placed in the strenuous test case, in process of the test when need measuring the performance parameter of LED sample, just the LED sample on the pallet is pulled down successively, be positioned in the integrating sphere one by one and measure, measure and again the LED sample is reinstalled on the pallet after complete, put back to and continue follow-up test in the strenuous test case.The problem of its existence is:
1, in whole process of the test, need to repeatedly install, dismantle the LED sample, increased a large amount of manpowers and time cost;
2 and installing, existing in the unloading process and cause the labile factor of test specimen performance change and affect final testing result.
Summary of the invention
In order to solve the prior art problem, the invention provides a kind of LED test box, scaling method and performance test methods of simple in structure and dependable performance.
A kind of LED performance test case, comprise casing, motor and get electro-optical device, also comprise gear train and optical fiber, described casing is provided with opening, described gear train and optical fiber pass described opening, the described electro-optical device of getting is arranged on described box house, it is outside that described motor is arranged on described casing, described gear train one end is connected with the axle of described motor, the other end is connected with the described electro-optical device of getting, described motor drives by described gear train and gets electro-optical device and move in casing, the first end of described optical fiber with described get that electro-optical device is connected and the second end outside described casing.
In more excellent scheme, also comprise connecting link, described opening is through hole, described gear train is rotating shaft, described rotating shaft one end is connected with the axle of motor, the first end of the other end and described connecting link is fixed, and the second end of described connecting link is fixed the described electro-optical device of getting, and described motor drives the described electro-optical device of getting by described rotating shaft and moves at the setting circumference.
In more excellent scheme, described rotating shaft has axial rotating shaft through hole, and described optical fiber passes described rotating shaft through hole.
In more excellent scheme, the seal that described opening part is provided with in the isolation casing and casing is outer.
In more excellent scheme, comprise that also the output signal end of described rotary encoder is electrically connected with described controller be used to the rotary encoder that feeds back described electric machine rotation angle with for the controller of controlling described motor rotation.
In more excellent scheme, also comprise photometer, the second end of described optical fiber is connected with described photometer.
In more excellent scheme, also comprise the LED shaft collar, described LED shaft collar has a plurality of LED fixed bits that are distributed on the circumference, and the center of circle of described circumference is on the residing straight line of described rotating shaft, so that the described LED that aims at when electro-optical device rotates on each LED fixed bit that gets.
In more excellent scheme, described get electro-optical device can near or away from described LED shaft collar.
The present invention also provides a kind of LED scaling method, adopts described LED performance test case, comprises the steps:
1) motor-driven is got electro-optical device and is moved setting circumference;
2) when getting electro-optical device and aim at certain LED, the output signal of record rotary encoder is set up the corresponding relation of the position of this output signal and LED.
In more excellent scheme,
In step 1), comprise that also photometer detects the light intensity of sending from getting LED that electro-optical device transmits;
In step 2) in, judge as follows whether get electro-optical device aims at certain LED: whether the light intensity that photometer detects peak value occurs; Output signal is the output signal at light intensity peak rotary encoder constantly.
The present invention also provides a kind of LED performance test methods, it is characterized in that: utilize described LED scaling method, comprise the steps:
Controller receives the control signal with the LED set position information, and makes driven by motor get the position that electro-optical device rotates to correspondence;
Controller receives the output signal of rotary encoder, if corresponding LED physical location and the LED desired location of this output signal is inconsistent, then controls motor and rotates towards the LED desired location.
The invention has the beneficial effects as follows: adopt the less electro-optical device of getting namely can the light of a plurality of LED samples to be gathered, so that the structure of whole LED performance test case is comparatively simple, simultaneously, when needs are changed the different LED shaft collar in interval between the LED fixed bit, only need to adjust and get the electro-optical device motion and aim at corresponding LED sample, and do not need other too much operations, thereby operation is comparatively simple, good to multiple LED shaft collar applicability, can avoid motor under the extreme test environment of inner chamber, to break down, reduce mission life; Especially get in the situation of electro-optical device rotation by rotating shaft and connecting link driving when motor, can also improve the sealing property of whole LED performance test case; Can detect online the timesharing of a plurality of LED properties of sample parameter simultaneously, need not repeatedly to install, dismantle the LED test specimen in the testing process, and do not interrupt putting on whole stress conditions of LED test specimen, thereby avoid the test error that changes and introduce because repeatedly installing, dismantle LED test specimen and stress condition.
Description of drawings
Fig. 1 is the partial schematic sectional view of the LED performance test case of an embodiment of the present invention;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the schematic perspective view of the LED shaft collar of Fig. 1.
Embodiment
Below with reference to accompanying drawing, specific embodiments of the invention are described further.
As illustrated in fig. 1 and 2, the LED performance test case of a kind of embodiment, comprise casing 1, motor 11, get electro-optical device 13, gear train 16 and optical fiber 14, casing 1 is provided with and is communicated with outside the casing and the opening 12 of the inner chamber 19 of casing, gear train 16 and optical fiber 14 pass opening 12, get the inner chamber 19 that electro-optical device 13 is arranged on casing 1, motor 11 is arranged on the outside of casing 1, one end of gear train 16 is connected with the through-drive of motor 11, the other end with get electro-optical device 13 and be connected, motor 11 can drive and gets electro-optical device 13 and move in the inner chamber 19 of casing 1 by driving gear train 16, opening 12 places are provided with the seal 18 of the outside of isolation inner chamber 19 and casing, the first end of optical fiber 14 with get electro-optical device 13 and be connected, the second end is connected with photometer 15 in the outside of casing 1.
Be provided with LED shaft collar 2 in the inner chamber 19, shaft collar 2 is provided with a plurality of LED fixed bits 21, motor 11 rotates under the control of controller and drives and get electro-optical device 13 motion, gets like this electro-optical device 13 and can aim at each LED fixed bit 21, the light that sends with the LED that receives on the LED fixed bit 21.
The LED shaft collar can adopt aluminium base, and LED can be welded on the corresponding LED fixed bit.
Like this, adopt and less get electro-optical device 13(such as one) namely can the light of a plurality of LED samples be gathered, so that the structure of whole LED performance test case is comparatively simple, simultaneously, when needs are changed the different LED shaft collar 2 in interval between the LED fixed bit 21, only need to adjust and get electro-optical device 13 motions and aim at corresponding LED sample, and do not need other too much operations, thereby operation is comparatively simple, and is good to multiple LED shaft collar applicability; Simultaneously motor 11 is placed on the outside of casing 1, can avoids motor 11 (high temperature, low temperature, high humidity etc.) under the extreme test environment of inner chamber 19 to break down, reduce mission life.
In a kind of more excellent embodiment, LED performance test case also comprises connecting link 17, opening 12 is through holes, gear train 16 is rotating shafts, rotating shaft 16 1 ends are connected with the axle of motor 11, the first end 171 of the other end and connecting link 17 is fixing, the second end 172 of connecting link is fixedly got electro-optical device 13, motor 11 is got electro-optical device 13 by rotating shaft 16 drives and is rotated at the circumference of setting, and a plurality of LED samples that distributing on the corresponding circumference on the LED shaft collar 2 can be aimed at each LED sample (geometric center of getting optical lens of for example getting electro-optical device 13 is aimed at the LED sample) when getting electro-optical device 13 rotation.Adopt such scheme; only need to adopt the through hole 12 of small diameter; namely can drive and get electro-optical device 13 and rotate on a large scale; to gather the light of a plurality of LED samples; thereby can adopt less seal 18 with the inner chamber 19 of realization casing 1 and outside isolation; otherwise; get electro-optical device 13 moving linearlies if adopt the motor 11 that is arranged on outside the casing 1 to drive; in order to detect more LED sample; then need to corresponding long opening 12 be set at casing 1; because the inner chamber 19 of LED performance test case can adopt high temperature usually; low temperature; the test environment of high humidity; the movement of gear train 16 is so that seal 18 is difficult to form closely sealing effectiveness with the wall of inner chamber 19, and sealed open 12 is difficulty very.
In addition, rotating shaft 16 can have the rotating shaft through hole 161 along rotor shaft direction, and optical fiber 14 passes rotating shaft through hole 161, one ends and puts in inner chamber 19 and get electro-optical device 13 and be connected, the other end passes casing 1 and is connected with photometer 15, can avoid like this rotation of rotating shaft 16 and coiling optical fiber 14 as far as possible.
LED performance test case can also comprise the rotary encoder 111 for feedback motor 11 rotational angles, with the controller that is used for 11 rotations of control motor, the axle of motor 11 turns to different angles, the output signal end of rotary encoder 111 is exported corresponding electric signal, the output signal end of rotary encoder 111 is electrically connected with controller, controller receives the instruction of the rotation set angle of the computing machine that is connected with controller, perhaps rotate set angle according to the setting of controller internal processes, receive the output electrical signals of rotary encoder 111 with Time Controller, controller judges whether this output electrical signals (the actual anglec of rotation of a corresponding motor 11) is corresponding with set angle, if it is not corresponding, then controller is further controlled motor 11 towards the position rotation of set angle, thereby realized the FEEDBACK CONTROL to motor 11, improved the running accuracy of motor 11.
Certainly, gear train 16 is not limited to the form of rotating shaft, and for example, motor 11 rotarily drives the screw mandrel motion, and connecting link one end is connected with wire rod thread, and the other end is fixedly got electro-optical device 13, can be with the connecting link rectilinear motion thereby get electro-optical device 13.
When LED performance test case also will be finished LED vibration-testing function, rotating shaft 16 can along rotating shaft axially near or away from LED shaft collar 2, get electro-optical device 13 corresponding sports thereby drive, when preventing 2 vibration of LED shaft collar with get electro-optical device 13 collisions.
The LED scaling method of a kind of embodiment, it adopts rotating shaft 16 as gear train, comprises the steps:
Get electro-optical device 13 center of circle rotation around this circumference on the circumference of setting 1-1. motor 11 drives: for example, computing machine sends the location position instruction to the controller of motor 11, and motor 11 namely begins driving and gets electro-optical device 13 rotations;
1-2. simultaneously, photometer 15 detects the light intensity of sending from getting LED that electro-optical device 13 transmits through optical fiber 14;
If 1-3. within certain time period, the light intensity that photometer 15 detects reaches a peak value, be to begin to reduce after light intensity increases gradually, what this maximum light intensity was corresponding namely is a peak value, at this moment, read and record the output signal (the corresponding different rotational angle of different output signals) of rotary encoder 111 from the computing machine (perhaps photometer 15) that photometer 15 connects, and set up the position of this LED and the corresponding relation of this output signal, can accurately aim at corresponding LED like this, certainly, also can in a single day detect light intensity by photometer 15, namely be considered as having aimed at certain LED.
1-4. drive motor 11 rotates a circle, and has namely finished the demarcation to all LED, has set up the corresponding relation of each LED position and corresponding output electrical signals.
When needs are changed other LED shaft collar 2, even the interval between the LED fixed bit is not identical, after above-mentioned demarcating steps, also can set up easily the output signal corresponding relation of each LED position and rotary encoder 111, adopt compared to existing technology the fixing electro-optical device of getting, structure is simpler, operates easier.
The LED performance test methods of a kind of embodiment comprises the steps:
2-1. when needing to detect the LED of assigned address, computing machine sends control signal with assigned address (desired location) to controller, and (user can manually input the coordinate figure of LED sample, computing machine can be converted to according to coordinate figure the encoded radio of corresponding rotary encoder), after controller receives this control signal, drive 11 drives of control motor and get the position that electro-optical device 13 rotates to correspondence;
2-2. controller receives the output signal of rotary encoder 111, if corresponding LED physical location and the LED assigned address of this output signal is inconsistent, then controls motor 11 towards the rotation of LED assigned address, until the LED physical location is consistent with the LED assigned address;
After 2-3. the light that corresponding LED sends is got electro-optical device 13 and is gathered, through optical fiber 14 be transferred to photometer 15, photometer 15 can detect the parameters such as the light intensity, spectrum, colourity of this LED.
LED performance test case, lighting system (comprise and get electro-optical device 13, optical fiber 14) and photometer 15 all can be controlled by the computing machine automatic synchronization, automatically record the case temperature, electric current, voltage, electric power of environmental parameter in test period, the LED performance test case, LED test specimen, relative parameters such as luminous power or light intensity, spectrum, colourity by computing machine follow procedure set model, according to the attenuation of test specimen performance parameter, calculate the estimated performance of test specimen by related algorithm.
Claims (10)
1. LED performance test case, comprise casing, motor and get electro-optical device, it is characterized in that: also comprise gear train and optical fiber, described casing is provided with opening, described gear train and optical fiber pass described opening, the described electro-optical device of getting is arranged on described box house, it is outside that described motor is arranged on described casing, described gear train one end is connected with the axle of described motor, the other end is connected with the described electro-optical device of getting, described motor is got electro-optical device by described gear train drive and is moved in casing, and the first end of described optical fiber is connected with the described electro-optical device of getting, and the second end is outside described casing.
2. LED performance test case as claimed in claim 1, it is characterized in that: also comprise connecting link, described opening is through hole, described gear train is rotating shaft, described rotating shaft one end is connected with the axle of motor, the first end of the other end and described connecting link is fixed, and the second end of described connecting link is fixed the described electro-optical device of getting, and described motor drives the described electro-optical device of getting by described rotating shaft and moves at the setting circumference.
3. LED performance test case as claimed in claim 2, it is characterized in that: described rotating shaft has axial rotating shaft through hole, and described optical fiber passes described rotating shaft through hole.
4. LED performance test case as claimed in claim 1 is characterized in that: the seal that described opening part is provided with in the isolation casing and casing is outer.
5. LED performance test case as claimed in claim 2, it is characterized in that: comprise that also the output signal end of described rotary encoder is electrically connected with described controller be used to the rotary encoder that feeds back described electric machine rotation angle with for the controller of controlling described motor rotation.
6. such as the arbitrary described LED performance test case of claim 1 to 5, it is characterized in that: also comprise photometer, the second end of described optical fiber is connected with described photometer.
7. such as the arbitrary described LED performance test case of claim 6, it is characterized in that: also comprise the LED shaft collar, described LED shaft collar has a plurality of LED fixed bits that are distributed on the circumference, the center of circle of described circumference is on the residing straight line of described rotating shaft, so that the described LED that aims at when electro-optical device rotates on each LED fixed bit that gets.
8. LED performance test case as claimed in claim 7 is characterized in that: described get electro-optical device can near or away from described LED shaft collar.
9. a LED scaling method is characterized in that: adopt LED performance test case as claimed in claim 8, comprise the steps:
1) motor-driven is got electro-optical device and is moved setting circumference;
2) when getting electro-optical device and aim at certain LED, the output signal of record rotary encoder is set up the corresponding relation of the position of this output signal and LED.
10. a LED performance test methods is characterized in that: utilize as claimed in claim 8 or 9 LED scaling method, comprise the steps:
Controller receives the control signal with the LED set position information, and makes driven by motor get the position that electro-optical device rotates to correspondence;
Controller receives the output signal of rotary encoder, if corresponding LED physical location and the LED desired location of this output signal is inconsistent, then controls motor and rotates towards the LED desired location.
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| CN201210471583.7A CN102967448B (en) | 2012-11-20 | 2012-11-20 | A kind of LED performance test case, scaling method and performance test methods |
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Cited By (1)
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| CN106291304A (en) * | 2016-07-29 | 2017-01-04 | 深圳清华大学研究院 | A kind of LED test device and method of testing |
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