CN109946581A - A kind of LED test automatic control system - Google Patents
A kind of LED test automatic control system Download PDFInfo
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- CN109946581A CN109946581A CN201910296820.2A CN201910296820A CN109946581A CN 109946581 A CN109946581 A CN 109946581A CN 201910296820 A CN201910296820 A CN 201910296820A CN 109946581 A CN109946581 A CN 109946581A
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- 238000012360 testing method Methods 0.000 title claims abstract description 107
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- 238000007639 printing Methods 0.000 claims description 5
- 230000002123 temporal effect Effects 0.000 claims description 5
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- 230000032683 aging Effects 0.000 description 11
- 238000001514 detection method Methods 0.000 description 8
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Abstract
The invention discloses a kind of LED to test automatic control system, carries out energizing test, and output test electric current to one group of concatenated LED sample；When occurring failure sample in one group of LED sample, automatic short circuit failure sample, and number and the out-of-service time of failure sample are recorded, until reaching test cut-off condition.Control logic of the present invention is simple, and test protection is good, and system is reliable and stable, use very conducive to promotion.
Description
Technical field
The invention belongs to photoelectric device the field of test technology more particularly to a kind of LED to test automatic control system.
Background technique
Light emitting diode, i.e. luminous LED device are one kind of semiconductor diode, electric energy can be converted to luminous energy.LED
With high-efficient, photochromic pure, the flexible in application, excellent characteristics such as light quality is high, light emitting diode is in many photoelectric control equipments
In be used as light source, in the electronic device be used as Signal Monitor.
However LED is in use, and due to the influence of electric current and external environment, aging can inevitably occur.
The aging of LED mainly includes the aging of aging and the encapsulation of chip.The agine mechaism of chip, including heat caused by thermal accumlation
Mechanical stress is reinforced, die crack expands, and chip adhesive layer caused by technique is bad completely disengages adhesive surface etc..The aging of encapsulation
Mechanism is mainly that high temperature with humidity causes encapsulating material to deteriorate, and steam penetrates into inside encapsulating material, leads to that lead is rotten, PCB copper
Line corrosion can reside in chip surface with the movable conductive ion that steam introduces, to cause to leak electricity.The LED light of aging shines
Efficiency will be greatly reduced, photochromic purity decline, or even burn.
But the aging of LED is not easy directly to observe judgement, since number of applications is huge, not easily passs through all detections also to sentence
It is disconnected.As energy-saving and environment-friendly lamps and lanterns are modernized, once aging occurs or burns, circuit will lose instruction function, to maintenance work
Bring tremendous influence.This phenomenon is for certain Important Circuits, and there are great security risks.
In the prior art, LED measuring technology includes LED voltage measurement, current measurement, light splitting detection technique etc..These inspections
The main purpose of survey is that manufacturer is tested for the property and screens to new LED product, and is not concerned with the ageing state of LED.Mesh
There are the following problems for preceding LED ageing management:
1) time of degradation is very long, needs in real time to carry out LED light the detection of ageing parameter.
2) to keep test current consistent, the test loop LED is cascade, and after some LED open circuit, other LED are lost
Power supply is removed, manual reversion must be waited to can continue to test.If break time is too long, the accurate of life appraisal result will affect
Property.
In consideration of it, the invention proposes a kind of reliable, efficient LED to test automatic control system, it can be successfully
It solves the above problems.
Summary of the invention
Goal of the invention: the present invention proposes a kind of LED test automatic control system, can automatically adjust the output of power module
Electric current is capable of the working condition of each LED of real-time monitoring, can judge automatically failure mode and be shorted the individual of failure, thus
Make other LED sample automatic recovery of power supply, to solve problems of the prior art.
Summary of the invention: a kind of LED test automatic control system, the automatic control system is to one group of concatenated LED sample
Carry out energizing test, and output test electric current；When occurring failure sample in one group of LED sample, automatic short circuit failure sample, and
The number of record failure sample and out-of-service time, until reaching test cut-off condition.The program can automatic short circuit fail sample, it is extensive
Retrial is tested, convenient and reliable.
Preferably, the automatic control system carries out energizing test to one group of concatenated LED sample, and permanent with may be programmed
Stream source output test electric current.Programmable constant-current source controlled current flow constant current, it is ensured that the accuracy and continuity of test.
Specifically, comprising: input module, power module, current sampling module, monitoring and isolation module, control module, drive
Dynamic model block, execution module；
Input module: connecting with control module, to input test current preset value, is supplied to control module；
Power module: connecting with control module, provides test current for LED sample；LED sample has after leading to test current
Status information；The status information includes the number information of LED sample；
Current sampling module: obtaining the test current of LED sample, when test current variation, feeds back to control module, controls
Molding block restores power module Adjustment Tests electric current to electric current preset value；
Monitoring and isolation module: being monitored the state of each LED sample, will when having monitored LED sample fails
The status information feedback of corresponding LED sample fails is to control module；And to the electric signal of control module and LED sample sets carry out every
From to protect control module；
Control module: monitoring, the test current for adjusting power module；Receive the LED sample that monitoring is issued with isolation module
Failure state information, and issue electric signal to drive module, read simultaneously the temporal information of LED sample fails；
Drive module: connecting with control module, receives the electric signal that control module issues, and execution module is driven to act；
Execution module: being driven by drive module, is shorted the LED sample of failure.The scheme of materialization has more reliability and company
Continuous property has the characteristics that automatically test, information are comprehensive.
Further, further include display module: being connect with control module, the size for the test current that display power module provides
And the status information of LED sample.Display module facilitates real-time display status information, improves human-computer interaction, makes experimenter just
In operation and feedback.
Further, further include storage and print module: being connect with control module, receive the electric signal that control module issues,
The number information and out-of-service time information of storage and the LED sample of printing failure.Storage extremely facilitates record to lose with print module
The information for imitating sample, accelerates the efficiency to form test archive.
Further, current sampling module feeds back to control module, control module makes power module when test current drifts about
Adjustment Tests electric current restores to electric current preset value.
Specifically, when the luminous flux of the LED sample reduces 50% or more, which is failure LED sample.Failure
The mode of LED sample detection luminous flux judgement failure, has the characteristics that sensitive reliable.
Specifically, when the LED test automatic control system reaches test cut-off condition, the LED test is automatically controlled
System stalls.Stop working saving test energy consumption.
Further, the test cut-off condition are as follows: the LED sample size of failure accounts for the 2/3 of LED total number of samples amount.Test
Cut-off condition meets the judgment criteria of objective reality using the quantitative proportion for the sample that fails as judgment basis.
Further, the status information includes number information, current information, the luminous flux information of LED sample.Number letter
Breath, current information, luminous flux information are the information that can directly read during testing, and are searched convenient for retrospect.
Compared to the prior art, the beneficial effects of the present invention are: LED provided by the invention tests automatic control system,
Device is full-automatic, and experimental condition is simple and convenient, and output result is reliable.Input module, current sampling module ensure the stabilization of electric current
Property, monitoring timely feedbacks the fail message of LED sample with isolation module, and protects control module to electric signal isolation；Drive mould
Block and execution module specifically execute short circuit failure sample and facilitate in time；Display module and storage and print module enhance man-machine friendship
Mutually, the process and result data for testing experimenter in time.Control logic of the present invention is simple, and test protection is good, system
It is reliable and stable, use very conducive to promotion.
Detailed description of the invention
Fig. 1 is the whole control structure schematic diagram of the embodiment of the present invention one.
Fig. 2 is the overall structure diagram of the embodiment of the present invention two.
In figure: 1- input module, 2- power module, 3- current sampling module, 4-LED sample, 40-LED sample sets, 5- prison
Survey and isolation module, 6- control module, 7- drive module, 8- execution module, 9- display module, 10- storage and print module；
100-LED test mechanism, 11- testboard bay, 110- original point position hole, 111- Infrared Projector, 12- are mechanical
Arm, 121- short circuit mechanism, 122- infrared signal receiver, 81- rotary actuator, 82- stretch executing agency, and 130- detects mould
Block.
Specific embodiment
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, letter will be made to embodiment below
Single introduction.
Embodiment one
Such as Fig. 1, a kind of LED test automatic control system, the automatic control system carries out one group of concatenated LED sample
Energizing test, and output test electric current preferably use programmable constant-current source output test electric current；It is lost in one group of LED sample
When imitating sample, automatic short circuit failure sample, and number and the out-of-service time of failure sample are recorded, until reaching test cut-off item
Part.The program can automatic short circuit fail sample, restore test, it is convenient and reliable.
Specifically, it includes: input module 1, power module 2, current sampling module 3, display that LED, which tests automatic control system,
Module 4, monitoring and isolation module 5, control module 6, drive module 7, execution module 8；Subjects include one group of concatenated LED
Sample 4 is combined into LED sample sets 40；
Input module 1: connecting with control module 6, to input test current preset value, is supplied to control module 6；
Power module 2: connecting with control module 6, provides test current for LED sample sets 40；For other all need electricity
Module for power supply；Each LED sample 4 has status information after leading to test current；The status information includes the number of LED sample 4
Information further includes current information, luminous flux information；
Current sampling module: obtaining the test current of LED sample 4, and when test current variation, usually test current is sent out
When raw drift, control module 6 is fed back to, the drift is drift caused by temperature drift or other environmental factors, wherein electric current
Sampling is to connect a precision resister in the loop LED sample is calculated according to Ohm's law by reading its end voltage
4 test current；Control module 6 restores 2 Adjustment Tests electric current of power module to electric current preset value；
Monitoring with isolation module 5: the state of each LED sample 4 is monitored, when monitored LED sample 4 fail
When, the status information feedback that corresponding LED sample 4 is failed is to control module 6；And to the electricity of control module 6 and LED sample sets 40
Signal is isolated, to protect control module 6；
Control module 6: monitoring, the test current for adjusting power module 2；Receive the LED sample that monitoring is issued with isolation module 5
The failure state information of product 4, and electric signal is issued to drive module 7, read simultaneously the temporal information of LED sample fails；Control
Module 6 is PLC or single-chip microcontroller；
Drive module 7: connecting with control module 6, receives the electric signal that control module 6 issues, and drives execution module 8 dynamic
Make；Execution module 8: being driven by drive module 8, is shorted the LED sample 4 of failure.
Further, the LED test automatic control system further includes display module 9: being connect with control module 6, display electricity
The size for the test current that source module 2 provides and the status information of each LED sample 4；The LED tests automatic control system
Further include storage with print module 10: being connect with control module 6, receive the electric signal that control module 6 issues, storage is lost with printing
The test current of test loop, the temporal information of test, the temporal information of failure and the sample number into spectrum information of the LED sample 4 of effect,
Luminous flux parameter information etc..Display module 9 facilitates real-time display status information, improves human-computer interaction；Storage and print module
The information for extremely facilitating record failure sample, accelerates the efficiency to form test archive.
The judgement of failure LED sample: when the luminous flux of the LED sample 4 reduces 50% or more, determine that the LED sample is
Fail LED sample 4.
Specifically, when the LED test automatic control system reaches test cut-off condition, the LED test is automatically controlled
System stalls, the test cut-off condition are as follows: the quantity of the LED sample 4 of failure accounts for the 2/3 of 4 total quantity of LED sample.
Embodiment two
Such as Fig. 2, embodiment two on the basis of example 1, has been expanded with lower module: LED test mechanism 100, detects mould
Block 130；The LED test mechanism 100 includes horizontal positioned testboard bay 11, the mechanical arm being set on testboard bay 11
12；The execution module 8 includes rotary actuator 81, flexible executing agency 82；The LED sample 4 is placed in testboard bay
On 11, the testboard bay 11 is provided with short circuit mechanism 121 in 4 side of LED sample, and the short circuit mechanism 121 is suitable for carrying out LED
It is shorted.
Specifically, the testboard bay 11 is disc, and is provided with original point position hole 110；LED sample sets 30 are that series connection connects
Connect, and according to one heart, etc. radiuses, homogeneous angular be mounted on testboard bay 11 disk corresponding position；The executing agency 8 wraps
Include rotary actuator 81, flexible executing agency 82, short circuit mechanism 121, the rotary actuator 81 and flexible executing agency
82 are respectively arranged on mechanical arm 12, and rotary actuator 81 drives the rotation process of mechanical arm 12；It is equipped on mechanical arm 12
Detection module 130, mechanical arm 12 itself do not do stretching motion, it is therefore an objective to be examined at detectable position (close to LED sample)
It surveys；The control module 6 controls drive module 7 and 121 pairs of failure LED samples of short circuit mechanism is driven to be shorted, short circuit mechanism 121
Structure is simple, and the conducting wire that only 4 both ends of LED sample of failure need to be connected is shorted, and can be the execution units such as relay.
The original point position hole 110 is equipped with Infrared Projector 111, and 12 corresponding position of mechanical arm installs infrared signal
Receiver 122, for mechanical arm 12 when rotation is to 110 top of original point position hole every time, infrared signal receiver 122 receives infrared letter
Number, and sending infrared signal to control module 6, control module 6 makes drive module 7 send reset drives signal, and rotation executes
Mechanism 81 resets once, to eliminate accumulated error；Similarly, the flexible executing agency 82 often stretches primary, and control module 6 makes
Drive module 7 sends a reset drives signal, resets flexible executing agency 82, to eliminate accumulated error, is equivalent to and often stretches
Contracting 1 time-one LED sample 4- of test withdraws and resets-turns over certain angle and stretches 1 time again, so recycles；And rotate one week,
Rotary actuator 81 resets once；
The detection module 130 includes luminous flux tester, to measure the luminous flux of LED sample 4, the parameter of luminous flux
The test of electrical property is compared in test, and the interference being subject to is small, and stability and directive property are more clear, and control module more easily determines failure
Sample；When detection module 130 detects the luminous flux of some LED sample 4 less than preset value, then failure LED sample is determined that it is
Product, control module 6 drive short circuit mechanism 121 to be shorted failure LED sample 4 immediately, with ensure other LED samples 4 after
Continuous proper testing.
In addition, the control module 6 issues electric signal to drive module 7, drive module 7 drives executing agency 8, particularly as
It is that driving rotary actuator 81 is rotated according to preset speed or angle, preset value is to be pre-set in control module 6, is revolved
When going to 4 top of sample LED, control module 6 controls drive module 7 and rotary actuator 81 is driven to stop rotating；Control module 6
Control drive module 7 drives flexible executing agency 82 to will test module 130 and pushes to predeterminated position near LED sample 4, this is pre-
If position be detect the characteristic parameter of corresponding LED sample 4 convenient for operating above the position such as LED of LED sample 4, and with storage with
The record of print module 10 and printing；When detection module 130 detects that luminous flux reduces by 50% or more LED sample 4, it is determined
Failure, control module 6 control drive module 7 and short circuit mechanism 121 are driven to be shorted failure LED sample 4；When failure
When 4 quantity of LED sample accounts for LED 4 total quantity of sample, then reach test cut-off condition.Wherein the rotary actuator 81 includes
The coaxial rotating electric machine with testboard bay 11, the rotating electric machine driving mechanical arm 12 carry out rotation process；The flexible execution
Mechanism 82 includes telescope motor 82 or linear motor, and the telescope motor driving screw body or linear motor driving are straight
The mechanism of line sliding rail, preferably telescope motor driving screw rod；The rotating electric machine, telescope motor are servo motor.
Above embodiments are only to illustrate the preferred technical solution of the present invention, it is noted that for the general of the art
For logical technical staff, without departing from the principle of the present invention, several improvement made or equivalent replacement are accordingly to be regarded as this
The protection scope of invention should be covered within the scope of the claims of the present invention.
Claims (10)
1. a kind of LED tests automatic control system, which is characterized in that the automatic control system is to one group of concatenated LED sample
Carry out energizing test, and output test electric current；When occurring failure sample in one group of LED sample, automatic short circuit failure sample, and
The number of record failure sample and out-of-service time, until reaching test cut-off condition.
2. a kind of LED according to claim 1 tests automatic control system, which is characterized in that the automatic control system
Energizing test carried out to one group of concatenated LED sample, and with programmable constant-current source output test electric current.
3. a kind of LED according to claim 1 or 2 tests automatic control system characterized by comprising input module,
Power module, current sampling module, monitoring and isolation module, control module, drive module, execution module；
Input module: connecting with control module, to input test current preset value, is supplied to control module；
Power module: connecting with control module, provides test current for LED sample；LED sample has state after leading to test current
Information；The status information includes the number information of LED sample；
Current sampling module: obtaining the test current of LED sample, when test current variation, feeds back to control module, controls mould
Block restores power module Adjustment Tests electric current to electric current preset value；
Monitoring and isolation module: being monitored the state of each LED sample, will be corresponding when having monitored LED sample fails
The status information feedback of LED sample fails is to control module；And control module is isolated with the electric signal of LED sample, from
And protect control module；
Control module: monitoring, the test current for adjusting power module；Receive the mistake for the LED sample that monitoring is issued with isolation module
Status information is imitated, and issues electric signal to drive module, reads simultaneously the temporal information of LED sample fails；
Drive module: connecting with control module, receives the electric signal that control module issues, and execution module is driven to act；
Execution module: being driven by drive module, is shorted the LED sample of failure.
4. a kind of LED according to claim 3 tests automatic control system, which is characterized in that further include display module: with
Control module connection, the size for the test current that display power module provides and the status information of LED sample.
5. a kind of LED according to claim 3 tests automatic control system, which is characterized in that further include storage and printing
Module: connecting with control module, receives the electric signal that control module issues, and storage and the number of the LED sample of printing failure are believed
Breath and out-of-service time information.
6. a kind of LED according to claim 3 tests automatic control system, which is characterized in that current sampling module is being tried
When galvanoscope drifts about, control module is fed back to, control module restores power module Adjustment Tests electric current to electric current preset value.
7. a kind of LED according to claim 1 tests automatic control system, which is characterized in that the light of the LED sample is logical
When amount reduces 50% or more, which is failure LED sample.
8. a kind of LED according to claim 1 tests automatic control system, which is characterized in that the automatic control of LED test
When system processed reaches test cut-off condition, the LED test automatic control system stops working.
9. a kind of LED according to claim 8 tests automatic control system, which is characterized in that the test cut-off condition
Are as follows: the LED sample size of failure accounts for the 2/3 of LED total number of samples amount.
10. a kind of LED according to claim 6 tests automatic control system, which is characterized in that the status information includes
Number information, current information, the luminous flux information of LED sample.
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| CN201910296820.2A CN109946581A (en) | 2019-04-14 | 2019-04-14 | A kind of LED test automatic control system |
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| CN201910296820.2A CN109946581A (en) | 2019-04-14 | 2019-04-14 | A kind of LED test automatic control system |
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| CN210376578U (en) * | 2019-04-14 | 2020-04-21 | 苏州科技大学 | LED test automatic control system |
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2019
- 2019-04-14 CN CN201910296820.2A patent/CN109946581A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101793943A (en) * | 2010-02-26 | 2010-08-04 | 苏州热工研究院有限公司 | Intelligent type test system for service life of fuses |
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