CN102045919B - LED light source self-diagnosis protection system - Google Patents
LED light source self-diagnosis protection system Download PDFInfo
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- CN102045919B CN102045919B CN201010261990.6A CN201010261990A CN102045919B CN 102045919 B CN102045919 B CN 102045919B CN 201010261990 A CN201010261990 A CN 201010261990A CN 102045919 B CN102045919 B CN 102045919B
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- led light
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- light source
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Abstract
The invention discloses a light emitting diode (LED) light source self-diagnosis protection system. The system consists of an LED light source and a central controller which is connected with the LED light source, wherein a set of LED light source is provided with a plurality of LED particles; the LED particles are connected with one another by a parallel connection and series connection combination method; each parallel connection group of LED particles serve as an LED light group; a triode is connected in parallel with the side of each parallel connection LED light group, and the resistance R*1 and the resistance R*2 of the triode are adjusted; and the equivalent resistance of the triode after the triode is switched on is the same as the original internal resistance of the LED light group. By the system, the set of LED light source still can be operated normally under the condition that a part of LED particles are damaged, the service life of the entire LED light source is prolonged and the cost for the replacement of the LED light source is saved.
Description
Technical field
The present invention relates to a kind of damage self diagnosis of LED lighting source the system of protection.
Background technology
LED illumination, with its low energy consumption, high-luminous-efficiency, becomes the emerging light source that prospect is unanimously had an optimistic view of.Along with the proposition of national low-carbon economy, LED light source can be widely used undoubtedly and promote.But it is high compared with conventional light source that shortcoming is cost, often a LED light source can cannot normally be worked in the situation that a certain LED particle has damage, causes changing whole LED light source, causes waste.
Summary of the invention
The present invention is for solving the easy wasting difficult problem of above-mentioned LED lighting source in prior art; a kind of LED light source self-diagnosis protection system is proposed; design a set of protective circuit, the in the situation that in a set of LED light source, part LED particle having damage, assurance system still can normally be worked.
The present invention for solving the technical scheme of the deficiencies in the prior art employing is: system is comprised of LED light source part and connected central controller; In a set of LED light source, have several LED particles, LED particle is formed in parallel group, more also joint group is connected; Each and joint group LED particle are a LED light group, a triode in parallel again on each parallel connection LED light group side; When a LED particle in parallel connection LED light group damages, adjust emitter side, the collector electrode side resistance of triode, the equivalent resistance after triode conducting is identical with the former internal resistance of this LED light group; Described central controller comprises microprocessor and peripheral coupled constant current unit, constant voltage unit, fault alarm unit.
Central controller comprises microprocessor and peripheral coupled constant current unit, constant voltage unit, fault alarm unit.Microprocessor adopts freescale8 position single-chip microcomputer 9S08AW32, is that automotive grade chip can meet adverse circumstances job requirement, contains 16 road 10AD conversions, and the PORT COM such as I2C, can meet requirement herein; Constant current unit adopt chip MAX16824 have three road 36V specified, open with Louing, constant current suction fan-out capability. can go here and there independently LED light group to three the drive current up to 150mA is provided, and can provide three road PWM light modulation inputs, for independent control, respectively go here and there the brightness of LED light group, and changeable conducting and shutoff of respectively going here and there LED light group; Constant voltage unit is in order to meet single-chip microcomputer and constant current chip requirements of one's work, and chip used is infineon company's T LE6389, has main output and closes, and exports under-voltage time delay and restarts, the functions such as short-circuit protection.Fault alarm unit comprises buzzer and group of four figures pipe, can demonstrate fault LED light group group number numbering according to predefined.
The invention has the beneficial effects as follows: a set of LED light source has the situation of damage still can normally work at part LED particle, extends the whole LED light source life-span, save the expense of changing LED light source.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and concrete execution mode, the present invention will be further described.
Fig. 1 is system configuration theory diagram of the present invention.
Fig. 2 is the LED light source circuit theory diagrams of the embodiment of the present invention.
Fig. 3 is the theory diagram of central controller of the present invention.
Fig. 4 is constant current element circuit schematic diagram of the present invention.
Fig. 5 is constant voltage element circuit schematic diagram of the present invention.
Fig. 6 is fault alarm unit theory diagram of the present invention.
Embodiment
Below in conjunction with embodiment, illustrate the present invention.
The present embodiment system is comprised of LED light source part and connected central controller; In a set of LED light source, there are 9 LED particles, the method that adopts parallel connection and serial connection to combine between LED particle, each and 3 LED particles of joint group are regarded a LED light group as, a triode in parallel again on each parallel connection LED light group side, adjust triode resistance R a1, Ra2 or Rb1, Rb2 or Rc1, Rc2, can make the equivalent resistance after triode conducting identical with the former internal resistance of this LED light group.
Accompanying drawing 3 is shown in by central controller, comprises microprocessor and peripheral coupled constant current unit, constant voltage unit, fault alarm unit.Microprocessor adopts freescale8 position single-chip microcomputer 9S08AW32, is that automotive grade chip can meet adverse circumstances job requirement, contains 16 road 10AD conversions, and the PORT COM such as I2C, can meet requirement herein; Constant current unit see accompanying drawing 4 adopt chip MAX16824 have three road 36V specified, open with Louing, constant current suction fan-out capability. can go here and there independently LED light group to three the drive current up to 150mA is provided, and can provide three road PWM light modulation inputs, for independent control, respectively go here and there the brightness of LED light group, and changeable conducting and shutoff of respectively going here and there LED light group; Constant voltage unit is in order to meet single-chip microcomputer and constant current chip requirements of one's work, and chip used is infineon company's T LE6389, has main output and closes, and export under-voltage time delay and restart, the functions such as short-circuit protection, non-emphasis of the present invention, with reference to accompanying drawing 5, does not elaborate.Fault alarm unit comprises buzzer and group of four figures pipe, can demonstrate fault LED light group group number numbering according to predefined, non-emphasis of the present invention, and accompanying drawing 6 is shown in by schematic diagram.
During system works, read voltage sample point (Ka during the Chip Microcomputer A/D cause for gossip of microprocessor, Kb, Kc, ) magnitude of voltage, Real-Time Monitoring LED light source working condition, when having a LEDs particle to damage as A1, its place parallel circuits resistance increases, corresponding sample amplitude when reproduced raises, single-chip microcomputer reads corresponding situation, can judge the LED light group at fault LED particle place, corresponding single-chip microcomputer is opened the triode base circuit A of this group, make triode conducting, because the effect of triode has reduced this group resistance again, other int LED particles still can normally be worked according to original design current, buzzer call now, charactron shows fault LED light group #.When system works on, this group LED particle occurs damaging again, system is closed all LED light groups; While having again not LED particle on the same group damage when system works on, this system repeats just now to move, until the LED amounts of particles that breaks down exceeds design, allows the quantity of damaging, and system is closed all LED light groups.
The present invention is not limited to above-described embodiment, and equivalent concepts or change in any technical scope disclosing in the present invention, all classify protection scope of the present invention as.
Claims (2)
1. a LED light source self-diagnosis protection system, is characterized in that: system is comprised of LED light source part and connected central controller, in a set of LED light source, have several LED particles, LED particle is formed in parallel group, more also joint group is connected, each and joint group LED particle are a LED light group, a triode in parallel again on each parallel connection LED light group side, when a LED particle in parallel connection LED light group damages, while being system works, read the magnitude of voltage of voltage sample point during the Chip Microcomputer A/D cause for gossip of microprocessor, Real-Time Monitoring LED light source working condition, when having a LEDs particle to damage, its place parallel circuits resistance increases, corresponding sample amplitude when reproduced raises, single-chip microcomputer reads corresponding situation, can judge the LED light group at fault LED particle place, corresponding single-chip microcomputer is opened the triode base circuit of this group, make triode conducting, because the effect of triode has reduced this group resistance again, other int LED particles still can normally be worked according to original design current, buzzer call now, charactron shows fault LED light group #, emitter side, the collector electrode side resistance of adjusting triode, the equivalent resistance after triode conducting is identical with the former internal resistance of this LED light group, described central controller comprises microprocessor and peripheral coupled constant current unit, constant voltage unit, fault alarm unit.
2. a kind of LED light source self-diagnosis protection system as claimed in claim 1, is characterized in that: described microprocessor adopts freescale8 position single-chip microcomputer 9S08AW32; Described constant current unit adopts chip MAX16824; Described constant voltage unit chip is infineon company's T LE6389; Described fault alarm unit comprises buzzer and group of four figures pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010261990.6A CN102045919B (en) | 2010-08-25 | 2010-08-25 | LED light source self-diagnosis protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010261990.6A CN102045919B (en) | 2010-08-25 | 2010-08-25 | LED light source self-diagnosis protection system |
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| Publication Number | Publication Date |
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| CN102045919A CN102045919A (en) | 2011-05-04 |
| CN102045919B true CN102045919B (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010261990.6A Expired - Fee Related CN102045919B (en) | 2010-08-25 | 2010-08-25 | LED light source self-diagnosis protection system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102448234A (en) * | 2011-10-13 | 2012-05-09 | 长春东铁通信信号设备有限公司 | Method and device for intelligently controlling high-power LED railway signal lamp |
| CN103292184A (en) * | 2013-06-05 | 2013-09-11 | 苏州惠瑞自动化集成有限公司 | Automatic illuminating system |
| CN106409194A (en) * | 2016-08-25 | 2017-02-15 | 广西小草信息产业有限责任公司 | LED lamp detection system and method |
| CN109050393B (en) * | 2018-06-05 | 2023-05-05 | 宁波市富来电子科技有限公司 | Linear control system for vehicle light assembly with combined tail lamp function |
| CN114567948B (en) * | 2022-04-01 | 2024-03-12 | 山东华天电气有限公司 | Energy-saving high-reliability partitioned series light source driving circuit and working method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889803A (en) * | 2005-06-27 | 2007-01-03 | 深圳市中电照明有限公司 | LED load protector line |
| CN101158451A (en) * | 2006-10-02 | 2008-04-09 | 文图文研究及发展公司 | LED lamp string |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070273296A9 (en) * | 1995-06-26 | 2007-11-29 | Jij, Inc. | LED light strings |
| CN101060738A (en) * | 2006-04-19 | 2007-10-24 | 嘉智集团有限公司 | Light string |
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2010
- 2010-08-25 CN CN201010261990.6A patent/CN102045919B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889803A (en) * | 2005-06-27 | 2007-01-03 | 深圳市中电照明有限公司 | LED load protector line |
| CN101158451A (en) * | 2006-10-02 | 2008-04-09 | 文图文研究及发展公司 | LED lamp string |
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| CN102045919A (en) | 2011-05-04 |
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