CN102045920A

CN102045920A - System for intelligently controlling energy efficiency of LED lighting source

Info

Publication number: CN102045920A
Application number: CN201010262002XA
Authority: CN
Inventors: 李志明; 叶威
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-25
Filing date: 2010-08-25
Publication date: 2011-05-04

Abstract

The invention relates to a system for intelligently controlling energy efficiency of LED lighting sources. More than 20% additional LED lighting sources with required lighting brightness in a certain region are needed, and all LED lighting sources are connected to an LED energy efficiency intelligent controller and controlled by the LED energy efficiency intelligent controller. The LED energy efficiency intelligent controller comprises a microprocessor, a temperature sampling unit, a current sampling unit, a constant voltage unit, a fault alarming unit and a constant current unit, wherein the periphery of the temperature sampling unit, the periphery of the current sampling unit, the periphery of the constant voltage unit and the periphery of the fault alarming unit are connected with the microprocessor; and the constant current unit is connected with the current sampling unit. Through the system, the power consumption distribution of the LED lighting sources is more scientific, and further the heat dissipation of the LED lighting sources is more uniform, the problem of heat dissipation in the application process of the LED lighting sources is solved, and the service life of the LED lighting sources is prolonged.

Description

LED lighting source efficiency intelligence control system

Technical field

The present invention relates to a kind of radiating treatment system of LED lighting source, relate in particular to the cooling system of Based Intelligent Control.

Background technology

The LED illumination becomes prospect by the consistent emerging light source of having an optimistic view of with its low energy consumption, high-luminous-efficiency.Along with the proposition of national low-carbon economy, the LED lighting source can be used widely and be promoted undoubtedly.The bottleneck of high-power LED illumination application at present is radiating treatment, and the theoretical life-span of LED lighting source can reach 50000 hours, and it is because heat dissipation problem fails to be solved at all that most LED lighting sources damage.

Summary of the invention

The present invention is for solving the difficult problem of LED lighting source heat radiation in the prior art, a kind of LED lighting source heat radiation solution is proposed, it is not to realize by seeking new heat sink material, but by improving LED lighting source drive circuit, allow the power consumption profile science more of LED lighting source, and then make the heat radiation of LED lighting source more even, heat can not in time be discharged in the LED lighting source application process thereby solve, in cumulative process, reach or break through LED lighting source heat balance point, and the problem that causes the LED lighting source to damage.

The concrete scheme of LED lighting source efficiency intelligence control system of the present invention is: at first the LED lighting source quantity design with required brightness of illumination in the zone has more 20%, and whole LED lighting sources linked to each other with LED efficiency intelligent controller controlled by it.

Described LED efficiency intelligent controller comprises microprocessor and peripheral coupled temperature sampling unit, current sampling unit, constant voltage unit, fault alarm unit, and the constant current unit that links to each other with current sampling unit.Microprocessor adopts 8 single-chip microcomputer 9S08AW32 of freescale, is that the automotive grade chip can satisfy the adverse circumstances job requirement, contains 16 tunnel 10 AD conversions, and PORT COM such as I2C, SPI can satisfy requirement herein; The constant current unit adopt chip MAX16824 have three road 36V specified, open with Louing, constant current suction fan-out capability, can going here and there independently to three, the drive current that provides up to 150mA be provided LED, and can provide three road PWM light modulations input, respectively go here and there the brightness of LED combination to be used for independent control, and changeable conducting and shutoff of respectively going here and there the LED combination; The temperature sampling unit comprises the temperature sensor on the aluminium base radiator, and be connected on thermistor in the LED illuminating lamp circuit, what link to each other with thermistor is conventional, electric-resistance, the numerical value of temperature sensor passes to single-chip microcomputer as calculating reference value a, thermistor equates because of series current with conventional, electric-resistance simultaneously, so its voltage difference has promptly reflected the difference of resistance, these data pass to single-chip microcomputer as calculating reference value b; Current sampling unit is known whole system power consumption situation at input termination sampling resistor by the voltage that records on it, and these data pass to single-chip microcomputer as calculating reference value c; The constant voltage unit is that DC changes chip operate as normal such as DC module assurance single-chip microcomputer; The fault alarm unit comprises buzzer and group of four figures pipe, can demonstrate fault LED lighting source group number numbering according to predefined.

Single-chip microcomputer is determined the entire system energy consumption by reference value c, determine this paths of LEDs lighting source energy consumption by reference value b, compare and determine whether this paths of LEDs lighting source is in normal operating conditions with reference value a (LED lighting source heat radiation this moment numerical value), single-chip microcomputer writes down each paths of LEDs lighting source operating state situation, and discharge working stability sequence list, relative one group of least stable LED lighting source cuts out, this process of circulation after a period of time, close for one group that this moment is least stable, that group that to close last time is opened simultaneously, this process designs fix a period of time circulation primary.System no longer checks judgment task when single-chip microcomputer has detected one group of LED lighting source and thoroughly damages, buzzer becomes alarm condition 1, charactron shows fault LED lighting source group #, the while single-chip microcomputer will remain several groups of LED lighting sources and all open, to guarantee that light fixture still can operate as normal, until there being two groups of LED lighting source light fixtures thoroughly to damage, buzzer becomes alarm condition 2, and other groups LED lighting source all turn-offs.

The invention has the beneficial effects as follows: by the power consumption profile of LED lighting source science more, and then make the heat radiation of LED lighting source more even by native system, dispel the heat, prolong LED lighting source useful life thereby solve in the LED lighting source application process.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and concrete execution mode.

Fig. 1 is a system configuration theory diagram of the present invention.

Fig. 2 is a constant current element circuit schematic diagram of the present invention.

Fig. 3 is a temperature sampling of the present invention unit theory diagram.

Fig. 4 is a constant voltage element circuit schematic diagram of the present invention.

Fig. 5 is a fault alarm of the present invention unit theory diagram.

Among Fig. 3,1, the aluminium base radiator, 2, temperature sensor, 3, thermistor, 4, conventional, electric-resistance.

Embodiment

Specify the present invention below in conjunction with embodiment.

Suppose that when design in certain zone need the brightness of 5 groups of LED lighting sources, then design this moment is with 6 groups of LED lighting sources, and the one group of LED lighting source that has more as an alternative.And whole LED lighting sources linked to each other with LED efficiency intelligent controller controlled by it.

Described LED efficiency intelligent controller comprises microprocessor and peripheral coupled temperature sampling unit, current sampling unit, constant voltage unit, fault alarm unit, and the constant current unit that links to each other with current sampling unit.Microprocessor adopts 8 single-chip microcomputer 9S08AW32 of freescale, is that the automotive grade chip can satisfy the adverse circumstances job requirement, contains 16 tunnel 10 AD conversions, and PORT COM such as I2C, SPI can satisfy requirement herein; The constant current unit see accompanying drawing 2 adopt chip MAX16824 have three road 36V specified, open with Louing, constant current suction fan-out capability, can going here and there independently to three, the drive current that provides up to 150mA be provided LED, and can provide three road PWM light modulations input, respectively go here and there the brightness of LED combination to be used for independent control, and changeable conducting and shutoff of respectively going here and there the LED combination; Accompanying drawing 3 is seen in the temperature sampling unit, comprise the temperature sensor 2 on the aluminium base radiator 1, and be connected on 1 Ω thermistor 3 in the LED illuminating lamp circuit, what link to each other with 1 Ω thermistor is 1 Ω conventional, electric-resistance 4, the numerical value of temperature sensor 2 passes to single-chip microcomputer as calculating reference value a, thermistor 3 equates with conventional, electric-resistance 4 because series current simultaneously, so its voltage difference has promptly reflected the difference of resistance, these data pass to single-chip microcomputer as calculating reference value b; Current sampling unit at input termination 0.1 Ω sampling resistor, is known whole system power consumption situation by the voltage that records on it referring to accompanying drawing 2, and these data pass to single-chip microcomputer as calculating reference value c; The constant voltage unit is that DC changes chip operate as normal such as DC module assurance single-chip microcomputer, and non-emphasis event of the present invention is omited, referring to accompanying drawing 4; The fault alarm unit comprises buzzer and group of four figures pipe, can demonstrate fault LED lighting source group number numbering according to predefined, non-emphasis of the present invention, and schematic diagram is seen accompanying drawing 5.

Single-chip microcomputer is determined the entire system energy consumption by reference value c, determine this paths of LEDs lighting source energy consumption by reference value b, compare and determine whether this paths of LEDs lighting source is in normal operating conditions with reference value a (LED lighting source heat radiation this moment numerical value), single-chip microcomputer writes down each paths of LEDs lighting source operating state situation, and discharge working stability sequence list, relative one group of least stable LED lighting source cuts out, this process of circulation after 5 minutes, close for one group that this moment is least stable, that group that to close last time is opened simultaneously, and this process does not have five minutes circulation primary.System no longer checks judgment task when single-chip microcomputer has detected one group of LED lighting source and thoroughly damages, buzzer becomes alarm condition 1, charactron shows fault LED lighting source group #, the while single-chip microcomputer will remain 5 groups of LED lighting sources and all open, to guarantee that light fixture still can operate as normal, until there being two groups of LED lighting source light fixtures thoroughly to damage, buzzer becomes alarm condition 2, and other groups LED lighting source all turn-offs.The present invention is not limited to the foregoing description, and protection scope of the present invention is all classified in any equivalent concepts or change in the technical scope that the present invention discloses as.

Claims

1. LED lighting source efficiency intelligence control system is characterized in that: the LED lighting source quantity of required brightness of illumination has more 20% in certain zone, and whole LED lighting sources linked to each other with LED efficiency intelligent controller controlled by it; Described LED efficiency intelligent controller comprises microprocessor and peripheral coupled temperature sampling unit, current sampling unit, constant voltage unit, fault alarm unit, and the constant current unit that links to each other with current sampling unit; Microprocessor adopts 8 single-chip microcomputer 9S08AW32 of freescale; The constant current unit adopts chip MAX16824; The temperature sampling unit comprises the temperature sensor (2) on the aluminium base radiator (1), and is connected on the thermistor (3) in the LED illuminating lamp circuit, and what link to each other with thermistor (3) is conventional, electric-resistance (4); Current sampling unit is at input termination sampling resistor; The constant voltage unit is that DC changes the DC module; The fault alarm unit comprises buzzer and group of four figures pipe.