CN102665351B

CN102665351B - Self-learning LED (Light-Emitting Diode) navigation aiding lamplight strength control device

Info

Publication number: CN102665351B
Application number: CN201210147265.5A
Authority: CN
Inventors: 谢一明; 禇衍波
Original assignee: ANBANG ELECTRIC Co Ltd WUXI
Current assignee: WUXI ANBANG ELECTRIC CO Ltd
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2014-05-07
Anticipated expiration: 2032-05-11
Also published as: CN102665351A

Abstract

The invention relates to a self-learning LED navigation light intensity control device, which comprises a transformer and a current transformer whose input ends are connected in series to the secondary side of the isolation transformer in the navigation light circuit, and the output end of the transformer is the same as the input of a power supply unit. The output terminal of the power supply unit is connected with the power input terminal of the control unit and the drive unit, the output terminal of the current transformer is connected with the input terminal of the detection unit, the output terminal of the detection unit is connected with the input terminal of the control unit, and the control unit outputs The terminal is connected with the input terminal of the drive unit, and the output terminal of the drive unit is connected with the LED light source. Its advantages are: the LED navigation lights composed of the present invention can directly replace the original traditional navigation lights of the airport without modifying the original dimming system; It has the characteristics of pure light color, low power consumption, long life and strong adaptability.

Description

Self-learning type LED navigation lamp light intensity control device

Technical field

The present invention relates to airfield aid light device, specifically a kind of self-learning type LED navigation lamp light intensity control device.

Background technology

The widely used navaid light adjusting system in current civil aviation airport, the light intensity of light is divided into 5 grades.By constant-current dimmer, the light intensity of airfield aid light is adjusted to required light intensity grade.The secondary aid-to-navigation light loop that is connected to of step-up transformer T1.Aid-to-navigation light loop is the suspension loop being together in series by a series of isolating transformer T2, as shown in Figure 1.The electric current that flows through all isolating transformer T2 in this loop is identical, and aid-to-navigation light L is connected to the secondary of isolating transformer T2, and the electric current of isolating transformer T2 primary and secondary remains 1:1 relation, and the luminous intensity of lamp is directly proportional to the electric current in loop.The size that changes like this electric current in loop just can regulate the brightness of aid-to-navigation light.Meanwhile, during current constant in loop, the brightness of aid-to-navigation light also will remain on steady state.So also identical with regard to the brightness of all aid-to-navigation lights in assurance system.The national standard (MH/T 6010-1999) of aid-to-navigation light constant-current dimmer is stipulated at present: dimmer (1-5 level) at different levels output current is respectively: 6.6A, 5.2A, 4.1A, 3.4A, 2.8A.Concrete as table 1.

The nominal value of table 1 dimmer output currents at different levels and permission excursion thereof

Current level	Nominal value (A)	Allow excursion (A)
			5	6.6	6.40~6.70
4	5.2	5.04~5.36
			3	4.1	3.98~4.22
2	3.4	3.30~3.50
			1	2.8	2.72~2.88

At present, the aid-to-navigation light light source on airport is mostly incandescent lamp, tungsten halogen lamp, and this class lamp power is large, efficiency is low.The shortcomings such as the life-span is short, and in use, need to adopt colour filter to obtain required color of light, not only utilance is low, and photochromic impure.While using LED as light source, cannot directly be connected in light modulation loop, need additional drives control circuit device.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of self-learning type LED navigation lamp light intensity control device is provided, need not add extra light intensity to locking equipment, need not existing dimmer be transformed or be changed.

According to technical scheme provided by the invention, described self-learning type LED navigation lamp light intensity control device comprises: transformer, after the input series connection of current transformer, be connected to the secondary of isolating transformer in aid-to-navigation light loop, the output of transformer connects with the input of power subsystem, the same control unit of output of power subsystem, the power input of driver element connects, the output of current transformer connects with the input of detecting unit, the output of detecting unit connects with the input of control unit, control unit output connects with the input of driver element, the output of driver element connects LED light source, described power subsystem includes DC/DC converter, operating voltage is provided and provides driving LED required voltage to driver element respectively to control unit, current transformer detects the light modulation electric current of dimmer output, by detecting unit, current signal is converted to voltage signal, after filtering interference signals, for control unit, carries out AD sampling, control unit is converted into analog quantity after digital quantity, then the light intensity class information comparison that this digital quantity is stored with self, judges current light adjusting grade, and to driver element, exports the pwm control signal of corresponding brightness, described driver element is used current constant mode driving LED light source, and by PWM mode, LED light source is carried out to brilliance control.

Further, described control unit adopts a microprocessor.

Described control unit carries out timing AD sampling to the signal of detecting unit output, draws the data after quantification, and the data that quantize are carried out to digital filtering, further removes disturbing factor.

Described control unit carries out after AD sampling, judges in stored record, whether have light intensity grade and current information record; If there is no record, to store this current information (fluctuation range of size of current, electric current), and start that dimmer is exported to different light adjusting grades and carry out self study, in learning process, light source is put minimum brightness; If there is record, according to the current information of sampling, carry out the judgement of light adjusting grade, LED light source is in corresponding brightness; Described self study refers to: at dimmer, exports under each light adjusting grade, and the current information that control unit minute book grade is corresponding, after the current stabilization of a grade, complete to the study of this grade; Treat that 5 grade study are complete, control unit automatic analysis is learnt the current information of 5 grades, and current information according to light intensity grade classification is the current range of 5 grades of correspondence.

When dimmer or aid-to-navigation light access aid-to-navigation light loop first, LED navigation lamp light intensity control device need to carry out the process of a self study: at dimmer, export under each light intensity grade, the current information that control unit minute book grade is corresponding, after the current stabilization of a grade, complete to the study of this grade; Treat that 5 grade study are complete, control unit automatic analysis is learnt the current information of 5 grades, and current information according to light intensity grade classification is the current range of 5 grades of correspondence.

Described driver element comprises: the brightness regulation pwm control signal that drives the light modulation input connection control unit output of control chip, drive the current sample end of control chip to connect LED current sense resistor to ground, drive the output of control chip to connect the base stage that drives triode, drive transistor collector to connect power supply, emitter connects the positive pole of LED light source; Described LED current sense resistor is serially connected in the loop of LED light source, drives control chip to detect the electric current that current flowing detects resistance, and controls and drive triode to realize the brightness adjustment control of LED light source, and LED light source is remained under constant current state work.

Control unit continue to detect the electric current of light intensity grade of living in, as electric current in aid-to-navigation light loop detected and fluctuate, and after current stabilization, records current electric current, the current information of the light intensity grade of living in of storing is upgraded simultaneously.

Advantage of the present invention is: without extra independent intensity control holding wire is provided, only according to the size of current (isolating transformer secondary current size) that detects dimmer output, automatically adjust light light intensity; The LED aid-to-navigation light of the present invention's design can directly be replaced the original traditional aid-to-navigation light in airport, need not transform original light adjusting system; It is light source that the light fixture of designing adopts great power LED, with traditional light fixture, compare and there is the features such as photochromic pure, low in energy consumption, life-span length, strong adaptability, meet the fundamental policy that national energy-saving reduces discharging, significant for the operation supportability that promotes Civil Aviation Airport.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of voyage aid of the airport circuit for lamp.

Fig. 2 is circuit structure block diagram of the present invention.

Fig. 3 is workflow diagram of the present invention.

Fig. 4 is driver element circuit theory diagrams.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

As shown in Figure 2, circuit structure of the present invention comprises: transformer 1, after the input series connection of current transformer 2, be connected to the secondary of isolating transformer in aid-to-navigation light loop, the output of transformer 1 connects with the input of power subsystem 3, the output of power subsystem 3 is with control unit 5, the power input of driver element 6 connects, the output of current transformer 2 connects with the input of detecting unit 4, the output of detecting unit 4 connects with the input of control unit 5, control unit 5 outputs connect with the input of driver element 6, the output of driver element 6 connects LED light source 7.

Described power subsystem 3 includes DC/DC converter, work+5V voltage is provided and provides driving LED required voltage to driver element 6 respectively to control unit 5; Current transformer detects the light modulation electric current of dimmer output, by detecting unit 4, current signal is converted to voltage signal, after filtering interference signals, for control unit 5, carries out AD (analog to digital converter) sampling; Control unit 5 contains microprocessor (MCU), the voltage signal of detecting unit 4 outputs is carried out to AD sampling, analog quantity is converted into after digital quantity, the light intensity class information comparison of again this digital quantity being stored with self, judge current light adjusting grade, and to driver element 6, export PWM (pulse-width modulation) control signal of corresponding brightness; Described driver element 6 is used current constant mode driving LED light source 7, and by PWM mode, LED light source 7 is carried out to brilliance control.Make LED in corresponding bright grade.

The circuit theory of driver element 6 as shown in Figure 4.In figure, VCC, GND are power input.PWM is control unit 5 output brightness conditioning signals.Driving control chip U1 model is MAX16803.Drive the light modulation input DIM of control chip U1 to connect pwm control signal, drive the current sample end CS+ of control chip U1 to connect LED current sense resistor R1 to ground, drive the output of control chip U1 to connect the base stage that drives triode Q1, drive triode Q1 collector electrode to meet power supply VCC, emitter connects the positive pole of LED light source; Described LED current sense resistor R1 is serially connected in the loop of LED light source.Drive control chip U1 to detect the electric current that current flowing detects resistance R 1, and control and drive triode Q1 to realize the brightness adjustment control of LED, and LED is remained under constant current state work.

Aid-to-navigation light constant-current dimmer is accepted the light modulation instruction of airfield control central, and the light intensity of airfield aid light is adjusted to required light intensity grade.And for each light intensity grade, aid-to-navigation light constant-current dimmer is exported different electric currents, light intensity grade is one to one with the electric current in aid-to-navigation light loop like this.So can judge residing light intensity grade according to size of current in aid-to-navigation light loop.

There is error, fluctuation in the electric current of exporting due to constant-current dimmer, so the corresponding size of current of each light intensity grade is a scope, rather than certain fixing value; Because on-the-spot sailing-assisting lamp system and wiring can not change, the electric current of output loop (isolating transformer primary return) that cannot direct-detection light adjusting system, can only detect isolating transformer secondary current; The current transfer ratio of isolating transformer primary and secondary there are differences because of Product Process problem; The secondary load meeting variation when aid-to-navigation light light modulation of isolating transformer, has influence on isolating transformer primary and secondary current transfer ratio.Due to above reason, the output loop electric current of light adjusting system and isolating transformer secondary current are not steady state values, if the accurate judgement to dimmer current class when aid-to-navigation light not by self study mode, is difficult to adapt to actual use.So the designed aid-to-navigation light of the present invention can detect the electric current of (isolating transformer is secondary) in loop automatically, and constantly according to the current range that electric current correction grade of living in detected.Aid-to-navigation light is stored in learnt current range in inner memory, and power down is not lost.After powering on next time, can directly enter corresponding light intensity grade according to loop current.

Constant-current dimmer (aid-to-navigation light) accesses aid-to-navigation light loop (navaid light adjusting system), the process that need to carry out a self study first.

Such as: first constant-current dimmer is exported the electric current of corresponding grade 1, and aid-to-navigation light is by current information (fluctuation range of size of current, electric current) corresponding to minute book grade.After grade 1 is stable, the study of aid-to-navigation light In Grade 1 is also complete, next the output of dimmer can be adjusted to grade 2.Learning process ad eundem 1 is the same.Until learnt 5 grades.Treat that the 5th grade study is complete, aid-to-navigation light is learnt automatic analysis the current information of 5 grades, and according to light intensity grade classification, is 5 corresponding grades to current information.After the data analysis that completes current information is processed, aid-to-navigation light automatically switches to corresponding light intensity grade by output intensity.

In course of normal operation, the aid-to-navigation light of the present invention's design still detects the electric current of light intensity grade of living in always.As electric current in aid-to-navigation light loop detected and fluctuate, after current stabilization, record current size of current, the current information of the corresponding light intensity grade of storage is carried out to synchronous renewal, to guarantee the current information accuracy of storage simultaneously.

When dimmer output intensity grade changes, curent change is larger, and aid-to-navigation light contrasts the electric current detecting with each grading current information of storing, judge residing light intensity grade, and export corresponding light intensity brightness.

It is below the workflow of a specific embodiment.

1, as shown in Figure 3, after control device powers on, microprocessor (MCU) first carries out the initialization of self.

2, MCU carries out timing AD sampling to the signal of detecting unit 4 outputs, draws the data after quantification.And the data that quantize are carried out to digital filtering, further remove disturbing factor.Draw stable, data message accurately.

3, MCU judges the data of sampling, whether judges in stored record current information record.Whether learnt the brightness degree of dimmer.

A: if there is no learning records, next dimmer is exported to different light adjusting grades and learn.First store this current information, until study is to the current information of 5 light adjusting grades.In learning process, light source is put minimum brightness.

B: if there is learning records, next enter normal workflow.According to the current information of sampling, carry out the judgement of brightness degree, LED light source 7 is in corresponding brightness.According to current light modulation current information, judge whether to carry out suitable correction to the electric current record of storage simultaneously.To guarantee the accuracy of each grading current information of record.

Claims

1. The self-learning LED navigation light intensity control device is characterized in that it includes a transformer (1) connected in series with the input end of a current transformer (2) and then connected to the secondary side of the isolation transformer in the navigation light circuit, and the transformer ( The output terminal of 1) is connected with the input terminal of the power supply unit (3), the output terminal of the power supply unit (3) is connected with the power input terminal of the control unit (5) and the drive unit (6), and the output terminal of the current transformer (2) The terminal is connected with the input terminal of the detection unit (4), the output terminal of the detection unit (4) is connected with the input terminal of the control unit (5), the output terminal of the control unit (5) is connected with the input terminal of the drive unit (6), and the driving The output end of the unit (6) is connected to the LED light source (7); the power supply unit (3) contains a DC/DC converter, which supplies the operating voltage to the control unit (5) and the drive unit (6) to drive the LED. The current transformer detects the dimming current output by the dimmer, and the detection unit (4) converts the current signal into a voltage signal, and after filtering out the interference signal, the control unit (5) performs AD sampling; the control unit (5) ) converts the analog quantity into a digital quantity, then compares the digital quantity with the light intensity level information stored by itself, determines the current dimming level, and outputs a PWM control signal corresponding to the brightness to the drive unit (6); The driving unit (6) drives the LED light source (7) in a constant current mode, and controls the brightness of the LED light source (7) in a PWM mode;

When the dimmer or navigation light is connected to the navigation light circuit for the first time, a self-learning process is required: at each light intensity level output by the dimmer, the control unit (5) records the current information corresponding to this level, After the current of one level is stable, the learning of the level is completed; after the learning of the five levels is completed, the control unit (5) automatically analyzes the current information of the five levels learned, and divides the current information into corresponding levels according to the light intensity level. 5 levels of current range.

2. The self-learning type LED navigation light intensity control device according to claim 1, wherein the control unit (5) adopts a microprocessor.

3. self-learning type LED navigation light intensity control device as claimed in claim 1, is characterized in that, described control unit (5) carries out timing AD sampling to the signal output by detection unit (4), obtains the data after quantization , and digitally filter the quantized data to further remove interference factors.

4. self-learning type LED navigation aid light intensity control device as claimed in claim 1, is characterized in that, after described control unit (5) carries out AD sampling, judge whether there is light intensity level and electric current information record in storage record; If If there is no record, store the current information of this time, and start self-learning for different dimming levels output by the dimmer. During the learning process, the light source is set to the lowest brightness; if there is a record, judge the dimming level according to the sampled current information , so that the LED light source (7) is on the corresponding brightness.

5. The self-learning LED navigation light intensity control device according to claim 1 or 4, wherein the current information includes: current magnitude and current fluctuation range.

6. The self-learning type LED navigation light intensity control device according to claim 1, wherein the drive unit (6) comprises: the dimming input terminal (DIM) of the drive control chip (U1) is connected to the control unit ( 5) The output brightness adjustment PWM control signal, the current sampling terminal (CS+) of the drive control chip (U1) is connected to the LED current detection resistor (R1) to ground, and the output terminal of the drive control chip (U1) is connected to the drive triode (Q1) The base, the collector of the drive triode (Q1) is connected to the power supply (VCC), and the emitter is connected to the positive pole of the LED light source; the LED current detection resistor (R1) is connected in series in the circuit of the LED light source, and the drive control chip (U1) detects the current The current of the overcurrent detection resistor (R1) is controlled to drive the triode (Q1) to realize the dimming control of the LED light source, and to keep the LED light source working in a constant current state.

7. The self-learning type LED navigation light intensity control device as claimed in claim 1, wherein the control unit (5) continuously detects the current at the light intensity level, and if it is detected that the current in the navigation light circuit fluctuates, After the current is stable, record the current current, and update the stored current information of the light intensity level at the same time.