CN104125694B - The method of testing of LED drive power output short circuit protection defect and device - Google Patents
The method of testing of LED drive power output short circuit protection defect and device Download PDFInfo
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- CN104125694B CN104125694B CN201310157171.0A CN201310157171A CN104125694B CN 104125694 B CN104125694 B CN 104125694B CN 201310157171 A CN201310157171 A CN 201310157171A CN 104125694 B CN104125694 B CN 104125694B
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Abstract
The embodiment of the invention discloses the method for testing of a kind of LED drive power output short circuit protection defect, including removing short-circuit condition after short circuit between positive pole and the negative pole of LED drive power outfan；The running parameter detecting described LED drive power is the most normal, if normally, respectively and positive pole and the negative pole of described LED drive power outfan is removed after short circuit between ground short-circuit condition；Whether the running parameter detecting described LED drive power is normal, if normally, will remove short-circuit condition between the negative pole of the LED load of described LED drive power and ground after short circuit；The running parameter detecting described LED drive power is the most normal, if normally, it is determined that the test of described LED drive power is passed through.The invention also discloses a kind of test device.Use the present invention, can effectively be diagnosed to be the fault of LED drive power, reduce maintenance cost.
Description
Technical field
The present invention relates to field tests, particularly relate to the test side of LED drive power output short circuit protection defect
Method and device.
Background technology
Light fixture, as a kind of lighting electric, is widely used.Wherein LED(Light Emitting Diode, luminous
Diode, is called for short LED) light fixture, because its volume is little, lightweight, light efficiency is high, low in energy consumption, life-span length,
Feature that fault is few and obtain the accreditation of users, in the substantial amounts of use in each row various places.
In LED lamp uses, the probability that LED drive power breaks down is the highest, and outfan short circuit is just
It it is one of reason causing LED driving damage.Because present great power LED drives, the LED of outfan bears
Carrying is all that series system connects (parallel way easily burns LED, unreliable), is heater element because of LED again,
The heat sink of LED directly contacts to dispel the heat with metal shell, and the track of LED is again directly to print
On heat sink, such structure, in actual use, the outfan of LED drive power is possible to
Multiple short-circuit condition occurs.In real work, it is necessary to light fixture of distinguishing one from the other during normal use occurs
Short-circuit condition, or both feelings that are short-circuit and that the most just find occur under light fixture is in dead status
Condition.In the case of every kind of difference, the short-circuit condition of appearance is likely to the damage causing LED drive power different
Bad phenomenon, and LED drive power about the detection method of short-circuit protection is now: first by LED drive power
Connecting with LED load, then input rated voltage work is to stable, then by LED drive power output lead
Between short circuit 1 hour, then go short circuit, check that LED drive power properties is the most normal.This kind of method,
The short-circuit conditions not being likely to occur LED drive power in actual use is all verified, causing can not be
The design phase of light fixture looks up out LED and drives flimsy hidden danger in output short-circuit, adds and takes after sale
Business cost, and affect client's use.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, it is provided that a kind of LED drive power output short-circuit
The method of testing of protection defect and device.Short-circuit protection detection method in prior art can be solved multiple for considering
Short-circuit conditions, causes the deficiency that cannot find the defect of LED drive power.
In order to solve above-mentioned technical problem, the invention provides a kind of LED drive power output short circuit protection and lack
The method of testing fallen into, including:
Short-circuit condition will be removed after short circuit between positive pole and the negative pole of LED drive power outfan；
The running parameter detecting described LED drive power is the most normal, if normally,
Positive pole and the negative pole of described LED drive power outfan respectively and are removed short circuit shape after short circuit between ground
State；
The running parameter detecting described LED drive power is the most normal, if normally,
Short-circuit condition is removed by after short circuit between the negative pole of the LED load of described LED drive power and ground；
The running parameter detecting described LED drive power is the most normal, if normally, it is determined that described LED
Driving power supply test passes through.
Correspondingly, present invention also offers the test device of a kind of LED drive power output short circuit protection defect,
Including:
First short block, for removing after short circuit between positive pole and the negative pole of LED drive power outfan
Short-circuit condition；
First judge module, the most normal for detecting the running parameter of described LED drive power,
Second short block, for the judged result of described first judge module for being time, described LED is driven
The positive pole of galvanic electricity source output terminal and negative pole respectively and remove short-circuit condition after short circuit between ground；
Second judge module, the most normal for detecting the running parameter of described LED drive power,
3rd short block, for the judged result of described second judge module for being time, described LED is driven
Short-circuit condition is removed after short circuit between the negative pole of the LED load in galvanic electricity source and ground；
3rd judge module is the most normal for detecting the running parameter of described LED drive power；
Result determines module, for the judged result of described 3rd judging unit for being time, it is determined that described LED
Driving power supply test passes through.
Implement the embodiment of the present invention, have the advantages that
The various short-circuit conditions that are likely to occur according to actually used situation analysis LED drive power also carry out there is pin
Short-circuit test to property, just can be diagnosed to be in the short-circuit protection performance of LED drive power at Design Stage
Defect, effectively prevent design, thus reduce and the product containing hidden danger is sent in client's hands
Probability, reduces after-sales service cost.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method for testing of a kind of LED drive power output short circuit protection defect of the embodiment of the present invention
Schematic flow sheet；
Fig. 2 is the test device of a kind of LED drive power output short circuit protection defect of the embodiment of the present invention
Schematic flow sheet；
Fig. 3 is the structural representation of the first short block in Fig. 2；
Fig. 4 is the structural representation of the second short block in Fig. 2；
The structural representation of the 3rd short block in Fig. 5 midway 2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
See Fig. 1, for the test of a kind of LED drive power output testing current defect of the embodiment of the present invention
The schematic flow sheet of method, the method includes:
Step 101, will after short circuit between positive pole and the negative pole of LED drive power outfan remove short-circuit condition.
Concrete, LED drive power accesses power supply and LED load, and test device is by LED drive power
Carrying out short circuit between positive pole and the negative pole of outfan, then remove short circuit state, concrete short circuit method may is that
1, test device is short by carrying out after the short circuit scheduled time between positive pole and the negative pole of LED drive power outfan
Connect, such as, by short circuit between output head anode and negative pole 1 hour, it is also possible to be 2, test device is by LED
Drive the transient state carrying out pre-determined number according to predetermined connection speed between positive pole and the negative pole of power output end short
Connect, such as, with 1 connection speed per second by positive pole and negative pole short circuit 20 times, it is also possible to be short by two kinds
The method that connects uses simultaneously, i.e. test device is first by short circuit between positive pole and the negative pole of LED drive power output point
The scheduled time, then will carry out the connection of pre-determined number between positive pole and negative pole by predetermined connection speed, this
Bright not being restricted, after carrying out above-mentioned short-circuit operation, test device removes short circuit state.
Step 102, the running parameter detecting described LED drive power are the most normal.
Concrete, the running parameter of LED power includes output voltage, output electric current and output, test
Device detection LED power after the short circuit of step 101 running parameter whether within normal range, if it is,
Then perform step 103, if it has not, perform step 107.
Step 103, positive pole and the negative pole of described LED drive power outfan respectively and are gone after short circuit between ground
Except short-circuit condition.
Concrete, test device by the positive pole of described LED drive power outfan and negative pole respectively and between ground short
Removing short-circuit condition behind road, concrete short circuit method may is that test device is by defeated for described LED drive power
Remove short-circuit condition after the plus earth scheduled time going out to hold power supply, such as, will remove after plus earth 1 hour
Short circuit state, removes short-circuit condition by after the short circuit scheduled time between the negative pole of described LED drive power and ground,
Such as minus earth 1 was as a child removed short circuit state, by the positive pole of described LED drive power outfan with
Remove short-circuit condition carry out the transient state short circuit of pre-determined number between ground according to predetermined connection speed after, such as, incite somebody to action
Negative pole carries out 20 ground connection with 1 connection speed per second, then removes short-circuit condition.
Step 104, detect described LED start power supply running parameter the most normal.
Concrete, the running parameter of LED power includes output voltage, output electric current and output, test
Device detection LED power after the short circuit of step 103 running parameter whether within normal range, if it is,
Then perform step 105, if it has not, perform step 107.
Remove after short circuit between step 105, the negative pole that the LED driving of described LED drive power is loaded and ground
Short-circuit condition.
Concrete, short between the negative pole of the LED load that LED drive power outfan is connected by test device and ground
Road, LED load is for being connected in series, and concrete short circuit method is it may be that each by described LED drive power
The negative pole of LED load short circuit successively and between ground, detects the operating current before each LED load short circuit and short circuit
After the difference of operating current；Choose the maximum LED load of difference as target LED load；By described mesh
Short-circuit condition is removed after the short circuit scheduled time between the negative pole of mark LED load and ground；By described target LED load
Negative pole and ground between carry out the transient state short circuit of pre-determined number according to predetermined connection speed after remove short-circuit condition.
Assume that LED drive power outfan connects and has 4 LED load connected, respectively LED1,
LED2, LED3 and LED4, owing to 4 LED load are series connection, then their operating current is equal,
Being assumed to be I, successively by short circuit between the negative pole of LED1 and ground, the operating current measuring now LED1 is I1；
By short circuit between the negative pole of LED2 and ground, the operating current measuring now LED2 is I2, according to said method obtains
Take the operating current after LED3 short circuit be the operating current after I3, LED4 short circuit be I4, calculate each LED
Operating current before load short circuit and the difference of operating current after short circuit, it is assumed that the value of LED3's | I-I3 | is
Greatly, then LED3 is target LED load, is as a child disconnected by short circuit 1 between the negative pole of LED3 and ground, then
With 1 with connection speed ground connection per second 20 times.
Step 106, the running parameter detecting described LED drive power are the most normal.
Concrete, the running parameter of LED power includes output voltage, output electric current and output, test
Device detection LED power after the short circuit of step 105 running parameter whether within normal range, if it is,
Then perform step 108, if it has not, perform step 107.
Step 107, get rid of the job failure of described LED drive power.
Concrete, position the job failure of described LED drive power side by side according to there is abnormal running parameter
Except this fault.
Step 108, determine described LED drive power test pass through.
Concrete, test device shows information that test passes through on a display screen or sends sound and light alarm and carry
The mode such as show is to determine that LED drive power test is passed through.
Preferably, above-mentioned test can be pre-with power down after described LED drive power powers on the scheduled time respectively
Carry out after fixing time, to test LED drive power running parameter under two states after short circuit.
Implement embodiments of the invention, according to actually used situation analysis LED drive power be likely to occur each
Plant short-circuit conditions and carry out short-circuit test targetedly, can just be diagnosed to be LED at Design Stage and drive
Defect in the short-circuit protection performance of power supply, effectively prevents design, thus reduces containing hidden danger
Product send to the probability in client's hands, reduce after-sales service cost.
See Fig. 2-Fig. 5, for a kind of LED drive power output short circuit protection defect of the embodiment of the present invention
The structural representation of test device, hereinafter referred to as device 1, this device 1 includes:
First short block 11, for going after short circuit between positive pole and the negative pole of LED drive power outfan
Except short-circuit condition.
Concrete, LED drive power accesses power supply and LED load, and LED is driven by the first short block 11
Carry out short circuit between positive pole and the negative pole of galvanic electricity source output terminal, then remove short circuit state, concrete short circuit method
May is that the 1, first short block 11 is by pre-for short circuit between positive pole and the negative pole of LED drive power outfan
Short circuit is carried out, such as, by short circuit between output head anode and negative pole 1 hour after fixing time, it is also possible to be 2,
First short block 11 will enter according to predetermined connection speed between positive pole and the negative pole of LED drive power outfan
The transient state short circuit of row pre-determined number, such as, with 1 connection speed per second by positive pole and negative pole short circuit 20 times,
Can also be two kinds of short circuit methods to be used, LED drive power be first exported by the i.e. first short block 11 simultaneously
The short circuit scheduled time between positive pole and the negative pole of point, then will enter by predetermined connection speed between positive pole and negative pole
The connection of row pre-determined number, the present invention is not restricted, after carrying out above-mentioned short-circuit operation, the first short block 11
Remove short circuit state.
First judge module 12 is the most normal for detecting the running parameter of described LED drive power.
Concrete, the running parameter of LED power includes output voltage, exports electric current and output, and first
Judge module 12 detect LED power after the short circuit of the first short block 11 running parameter whether normally
In the range of.
Second short block 13, for the judged result of the first judge module 12 for being time, by described LED
The positive pole and the negative pole that drive power output end respectively and remove short-circuit condition after short circuit between ground.
Concrete, positive pole and the negative pole of described LED drive power outfan are distinguished by the second short block 13
And removing short-circuit condition between ground after short circuit, concrete short circuit method may is that the second short block 13 is by described
Remove short-circuit condition after the plus earth scheduled time of LED drive power output end power, such as, positive pole is connect
Short circuit state is removed on ground after 1 hour, after the short circuit scheduled time between the negative pole of described LED drive power and ground
Remove short-circuit condition, such as, minus earth 1 was as a child removed short circuit state, by described LED drive power
Short circuit is removed carry out the transient state short circuit of pre-determined number between the positive pole of outfan and ground according to predetermined connection speed after
State, such as, carries out 20 ground connection by negative pole with 1 connection speed per second, then removes short-circuit condition.
Second judge module 14 is the most normal for detecting the running parameter of described LED drive power.
Concrete, the running parameter of LED power includes output voltage, exports electric current and output, and second
Judge module 14 detect LED power after the short circuit of the second short block 13 running parameter whether normally
In the range of.
3rd short block 15, for the judged result of the second judge module 14 for being time, by described LED
Drive and between the negative pole of the LED load of power supply and ground, after short circuit, remove short-circuit condition.
Concrete, the negative pole of the LED load that LED drive power outfan is connected by the 3rd short block 15
And short circuit between ground, LED load is for being connected in series, and concrete short circuit method is it may be that drive electricity by described LED
The negative pole of each LED load in source short circuit successively and between ground, detects the electricity of the work before each LED load short circuit
The difference of the operating current after stream and short circuit；Choose the maximum LED load of difference as target LED load；
Short-circuit condition is removed by after the short circuit scheduled time between the negative pole of described target LED load and ground；By described target
Remove short carry out the transient state short circuit of pre-determined number between the negative pole of LED load and ground according to predetermined connection speed after
Line state.
Assume that LED drive power outfan connects and has 4 LED load connected, respectively LED1,
LED2, LED3 and LED4, owing to 4 LED load are series connection, then their operating current is equal,
Being assumed to be I, successively by short circuit between the negative pole of LED1 and ground, the operating current measuring now LED1 is I1；
By short circuit between the negative pole of LED2 and ground, the operating current measuring now LED2 is I2, according to said method obtains
Take the operating current after LED3 short circuit be the operating current after I3, LED4 short circuit be I4, calculate each LED
Operating current before load short circuit and the difference of operating current after short circuit, it is assumed that the value of LED3's | I-I3 | is
Greatly, then LED3 is target LED load, is as a child disconnected by short circuit 1 between the negative pole of LED3 and ground, then
With 1 with connection speed ground connection per second 20 times.
3rd judge module 16 is the most normal for detecting the running parameter of described LED drive power.
Concrete, the running parameter of LED power includes output voltage, exports electric current and output, and the 3rd
Judge module 16 detect LED power after the short circuit of the 3rd short block 15 running parameter whether normally
In the range of.
Result determines module 17, for the judged result of the 3rd judging unit 16 for being time, it is determined that described
LED drive power test is passed through.
Concrete, result determines that module 17 shows on a display screen and tests the information passed through or send acousto-optic
The modes such as alarm determine that LED drive power test is passed through.
Implement embodiments of the invention, according to actually used situation analysis LED drive power be likely to occur each
Plant short-circuit conditions and carry out short-circuit test targetedly, can just be diagnosed to be LED at Design Stage and drive
Defect in the short-circuit protection performance of power supply, effectively prevents design, thus reduces containing hidden danger
Product send to the probability in client's hands, reduce after-sales service cost.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method,
Can be by computer program and complete to instruct relevant hardware, described program can be stored in a calculating
In machine read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.
Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory,
Or random store-memory body (Random Access Memory, RAM) etc. ROM).
Above disclosed only one preferred embodiment of the present invention, can not limit this with this certainly
Bright interest field, one of ordinary skill in the art will appreciate that all or part of stream realizing above-described embodiment
Journey, and according to the equivalent variations that the claims in the present invention are made, still fall within the scope that invention is contained.
Claims (8)
1. the method for testing of a LED drive power output short circuit protection defect, it is characterised in that including:
Described LED drive power is powered on the scheduled time or the power down scheduled time；
Short-circuit condition will be removed after short circuit between positive pole and the negative pole of LED drive power outfan；
The running parameter detecting described LED drive power is the most normal, if normally,
Positive pole and the negative pole of described LED drive power outfan respectively and are removed short circuit shape after short circuit between ground
State；
The running parameter detecting described LED drive power is the most normal, if normally,
Short-circuit condition is removed by after short circuit between the negative pole of the LED load of described LED drive power and ground；
The running parameter detecting described LED drive power is the most normal, if normally, it is determined that described LED
Driving power supply test passes through.
2. method of testing as claimed in claim 1, it is characterised in that described by LED drive power output
The step removing short-circuit condition between positive pole and the negative pole of end after short circuit specifically includes:
Short circuit shape will be removed after the short circuit scheduled time between positive pole and the negative pole of described LED drive power outfan
State；
The positive pole of described LED drive power outfan is carried out predetermined time with negative pole according to predetermined speed of connecting
Short-circuit condition is removed after the transient state short circuit of number.
3. method of testing as claimed in claim 2, it is characterised in that described by described LED drive power
The positive pole of outfan and negative pole respectively and are removed the step of short-circuit condition and are specifically included after short circuit between ground:
Short-circuit condition is removed by after the short circuit scheduled time between the positive pole of described LED drive power outfan and ground；
Short-circuit condition is removed by after the short circuit scheduled time between the negative pole of described LED drive power outfan and ground；
Predetermined time will be carried out according to predetermined connection speed between the positive pole of described LED drive power outfan and ground
Short-circuit condition is removed after the transient state short circuit of number.
4. method of testing as claimed in claim 3, it is characterised in that described by described LED drive power
The negative pole of LED load and ground between remove the step of short-circuit condition after short circuit and specifically include:
By the negative pole of each LED load of described LED drive power short circuit successively and between ground, detect each
Operating current before LED load short circuit and the difference of the operating current after short circuit；
Choose the maximum LED load of difference as target LED load；
Short-circuit condition is removed by after the short circuit scheduled time between the negative pole of described target LED load and ground；
The wink of pre-determined number will be carried out according to predetermined connection speed between the negative pole of described target LED load and ground
Short-circuit condition is removed after state short circuit.
5. the test device of a LED drive power output short circuit protection defect, it is characterised in that including:
Pretreatment module, for powering on described LED drive power the scheduled time or the power down scheduled time；
First short block, for removing after short circuit between positive pole and the negative pole of LED drive power outfan
Short-circuit condition；
First judge module, the most normal for detecting the running parameter of described LED drive power,
Second short block, for the judged result of described first judge module for being time, described LED is driven
The positive pole of galvanic electricity source output terminal and negative pole respectively and remove short-circuit condition after short circuit between ground；
Second judge module, the most normal for detecting the running parameter of described LED drive power,
3rd short block, for the judged result of described second judge module for being time, described LED is driven
Short-circuit condition is removed after short circuit between the negative pole of the LED load in galvanic electricity source and ground；
3rd judge module is the most normal for detecting the running parameter of described LED drive power；
Result determines module, for the judged result of described 3rd judging unit for being time, it is determined that described
LED drive power test is passed through.
6. device as claimed in claim 5, it is characterised in that described first short block includes:
First fixes short circuit test cell, for by the positive pole of described LED drive power outfan and negative pole it
Between remove short-circuit condition after the short circuit scheduled time；
First transient state short circuit test cell, for pressing positive pole and the negative pole of described LED drive power outfan
Short-circuit condition is removed carry out the transient state short circuit of pre-determined number according to predetermined connection speed after.
7. device as claimed in claim 6, it is characterised in that described second short block includes:
Positive pole short circuit test cell, for by pre-for short circuit between the positive pole of described LED drive power outfan and ground
Short-circuit condition is removed after fixing time；
Negative pole short circuit test cell, for by pre-for short circuit between the negative pole of described LED drive power outfan and ground
Short-circuit condition is removed after fixing time；
Second transient state short circuit test cell, for pressing between the positive pole of described LED drive power outfan and ground
Short-circuit condition is removed carry out the transient state short circuit of pre-determined number according to predetermined connection speed after.
8. device as claimed in claim 7, it is characterised in that described 3rd short-circuit unit includes:
Current differential computing unit, for by the negative pole of each LED load of described LED drive power successively
And short circuit between ground, detects the operating current before each LED load short circuit and the difference of the operating current after short circuit
Value；
Targeted loads determines unit, for choosing the maximum LED load of difference as target LED load；
Second fixes short circuit test cell, for being made a reservation for by short circuit between the negative pole of described target LED load and ground
Short-circuit condition is removed after time；
3rd transient state short circuit test cell, for by between the negative pole of described target LED load and ground according to predetermined
Connection speed carry out the transient state short circuit of pre-determined number after remove short-circuit condition.
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| CN201310157171.0A CN104125694B (en) | 2013-04-28 | 2013-04-28 | The method of testing of LED drive power output short circuit protection defect and device |
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| CN201310157171.0A CN104125694B (en) | 2013-04-28 | 2013-04-28 | The method of testing of LED drive power output short circuit protection defect and device |
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| CN104125694B true CN104125694B (en) | 2016-08-24 |
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| CN101534594A (en) * | 2008-03-12 | 2009-09-16 | 奇美电子股份有限公司 | Circuit and method for short-circuit protection of light-emitting diode (LED) lightbars |
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| Publication number | Publication date |
|---|---|
| CN104125694A (en) | 2014-10-29 |
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