CN202475859U - Current measuring controller for LED light fixture - Google Patents
Current measuring controller for LED light fixture Download PDFInfo
- Publication number
- CN202475859U CN202475859U CN2012200127117U CN201220012711U CN202475859U CN 202475859 U CN202475859 U CN 202475859U CN 2012200127117 U CN2012200127117 U CN 2012200127117U CN 201220012711 U CN201220012711 U CN 201220012711U CN 202475859 U CN202475859 U CN 202475859U
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- light fixture
- led light
- voltage stabilizing
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Abstract
The utility model discloses a current measuring controller for an LED light fixture, comprising an isolation transformer, a rectification circuit, a constant current voltage stabilizing circuit, an LED drive circuit, a current sampling circuit, a signal conditioning circuit and a signal processor, wherein one end of the rectification circuit is connected with the secondary side of the isolation transformer, the other side of the isolation transformer is connected with the input end of the constant current voltage stabilizing circuit, the output end of the constant current voltage stabilizing circuit is connected with the input end of the LED drive circuit, the current sampling circuit is connected with the secondary side of the isolation transformer, sample signals are amplified and shifted through the signal conditioning circuit, and processed into PWM signals by the signal processor, and the PWM signals are input into the LED drive circuit. The current measuring controller for an LED light fixture has the beneficial effects of being simple in structure and reliable in working, realizing accurate current control, and being suitable to LED light fixture control on airport runway and taxiway, etc.
Description
Technical field
The utility model relates to a kind of lamp control device, particularly a kind ofly realizes controller that the LED light fixture is controlled through measuring electric current.
Background technology
The airfield aid photosystem is to ensure aircraft under night, low visibility or other complicated weather condition, the necessary visual navigational aid that takes off normally, lands, slides in the air harbor.The light source of Halogen lamp LED as navigational lighting aid generally adopted on the airport, shortcomings such as light efficiency is low, the life-span is short, easy damage.LED navigational lighting aid system newly developed, have efficient height, energy-saving and environmental protection, etc. advantage, but original navigational lighting aid electric power system and is not suitable for the light control of LED light fixture.
The utility model content
The goal of the invention of the utility model is: the problem to above-mentioned existence, a kind of LED light fixture flow measurement controller is provided, and be used for supporting use with the LED light fixture.
The technical scheme that the utility model adopts is such: a kind of LED light fixture flow measurement controller; Comprise isolating transformer, rectification circuit, constant current voltage stabilizing circuit, led drive circuit, current sampling circuit, signal conditioning circuit and signal processor; Said rectification circuit one end is connected with the secondary of isolating transformer; Another side is connected with the input of constant current voltage stabilizing circuit, and the output of constant current voltage stabilizing circuit is connected with the input of led drive circuit, and said current sampling circuit inserts the secondary of isolating transformer; Signal after the sampling amplifies through signal conditioning circuit and moves, after the signal processor processes, produces pwm signal input led drive circuit.
In sum; Owing to adopted technique scheme, the beneficial effect of the utility model is: through detection to size of current, and the PWM waveform of output different duty; Led drive circuit is different according to the PWM waveform; Control LED lamp end electric current, thereby the brightness of control LED light fixture, realization LED light fixture no color differnece is accurately controlled; Simple in structure, reliable operation has realized the accurate control to electric current, is applicable to the control to LED light fixtures such as airfield runway, taxiways.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
As shown in Figure 1; A kind of LED light fixture flow measurement controller comprises isolating transformer, rectification circuit, constant current voltage stabilizing circuit, led drive circuit, current sampling circuit, signal conditioning circuit and signal processor, and said rectification circuit one end is connected with the secondary of isolating transformer; Another side is connected with the input of constant current voltage stabilizing circuit; The output of constant current voltage stabilizing circuit is connected with the input of led drive circuit, and said current sampling circuit inserts the secondary of isolating transformer, the signal after the sampling amplify through signal conditioning circuit and move, after the signal processor processes; Produce pwm signal input led drive circuit, the output of led drive circuit is connected on the LED lamp.
It is direct current with the rectification of isolating transformer secondary alternating current that rectification circuit adopts rectifier bridge.
In the current sampling circuit, the isolating transformer secondary connects current sensor, realizes the transformation of current signal to voltage signal; Signal conditioning circuit carries out the current sensor output voltage that signal amplifies and voltage is moved, with voltage input signal be adjusted into the 0V that signal processor can normally receive～+ voltage signal of 3V.
Signal processor has the FLASH of 1K byte, the 16 bit timing counter RAM of 2 768B, and 1 PWM, 1 tunnel 16 ADC is to satisfy the demands.
The ADC of signal processor is converted into digital quantity with the analog signal of signal conditioning circuit output, and according to the difference of digital quantity, the signal processor software program is provided with the output duty cycle of pwm signal.
The alternating current that rectification circuit is exported the isolating transformer secondary carries out rectifying and wave-filtering and becomes direct current, and the direct current after the rectification outputs to the input of constant current voltage stabilizing circuit; In the constant current voltage stabilizing circuit,, accomplish the effect of current limliting and voltage stabilizing through the effect of three-terminal voltage-stabilizing diode and metal-oxide-semiconductor.
Led drive circuit adopts the LED chip for driving, and this chip has the PWM dimming function, in up to the dimming scope of 3000:1, keeps constant led color.
The pwm signal of signal processor output is input in the led drive circuit, through the PWM dimming function of LED chip for driving in the led drive circuit, realizes the light intensity regulating of LED color constancy.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (1)
1. LED light fixture flow measurement controller; It is characterized in that: comprise isolating transformer, rectification circuit, constant current voltage stabilizing circuit, led drive circuit, current sampling circuit, signal conditioning circuit and signal processor; Said rectification circuit one end is connected with the secondary of isolating transformer; Another side is connected with the input of constant current voltage stabilizing circuit, and the output of constant current voltage stabilizing circuit is connected with the input of led drive circuit, and said current sampling circuit inserts the secondary of isolating transformer; Signal after the sampling amplifies through signal conditioning circuit and moves, after the signal processor processes, produces pwm signal input led drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200127117U CN202475859U (en) | 2012-01-12 | 2012-01-12 | Current measuring controller for LED light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200127117U CN202475859U (en) | 2012-01-12 | 2012-01-12 | Current measuring controller for LED light fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202475859U true CN202475859U (en) | 2012-10-03 |
Family
ID=46923978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200127117U Expired - Lifetime CN202475859U (en) | 2012-01-12 | 2012-01-12 | Current measuring controller for LED light fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202475859U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470149A (en) * | 2014-12-25 | 2015-03-25 | 东莞卫光电子科技有限公司 | Dimming circuit suitable for multiple dimming modes |
-
2012
- 2012-01-12 CN CN2012200127117U patent/CN202475859U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470149A (en) * | 2014-12-25 | 2015-03-25 | 东莞卫光电子科技有限公司 | Dimming circuit suitable for multiple dimming modes |
| CN104470149B (en) * | 2014-12-25 | 2017-04-12 | 东莞卫光电子科技有限公司 | Dimming circuit suitable for multiple dimming modes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |