CN204259207U

CN204259207U - Rail vehicle led illumination control system

Info

Publication number: CN204259207U
Application number: CN201420386971.XU
Authority: CN
Inventors: 田园; 于向和; 周佩秋; 王珊珊; 徐作华; 王育波; 王敬艳
Original assignee: Changchun Vocational Institute Of Technology (changchun Vocational And Technical Education Center Changchun Finance School)
Current assignee: Changchun Vocational Institute Of Technology (changchun Vocational And Technical Education Center Changchun Finance School)
Priority date: 2014-07-15
Filing date: 2014-07-15
Publication date: 2015-04-08
Anticipated expiration: 2024-07-15

Abstract

The utility model relates to a kind of rail vehicle LED illumination control system, with Single Chip Microcomputer (SCM) system (1) for control core, vehicle environment brightness information brightness Acquisition Circuit (201) in ambient brightness acquisition module (2) collected converts analog quantity to digital quantity by modulus conversion chip ADC0809 (202) and sends Single Chip Microcomputer (SCM) system (1) to, the information obtained is stored row relax of going forward side by side by STC89C51 single-chip microcomputer (101), according to the strong and weak information of the exterior light received calculate applicable carlighting light luminance after, externally LED drive circuit (3) sends dimming information, outside LED driver PT4107(301) digital information received is processed after, carry out the light modulation to LED, and then control the LED illumination brightness of whole compartment.This system takes full advantage of that the efficiency that LED illumination has is high, the life-span long, resistance to shock is good and the advantage of environmental protection, is applied to railway carriage inside, meets the requirement of rail vehicle to present lighting control system; Its control system ambient brightness information that can gather in compartment row relax of going forward side by side calculates the light luminance of applicable carlighting, achieves the luminous intensity intelligent control of LED illumination System.Rail vehicle LED illumination control system involved by the utility model is novel in design, innovates original, is quick on the draw, low cost of manufacture, use respond well.

Description

Rail vehicle LED illumination control system

Technical field:

The present invention relates to a kind of electrical apparatus controlling system, especially for rail vehicle LED illumination device control system, belong to electrical engineering field.

Background technology:

At present, urban rail transit in China enters the high-speed developing period, and the subway line built in recent years, motor-car line and light rail increase rapidly.Because its special line is exercised, can avoid the factor such as traffic congestion, time delays, taking trolley coach trip becomes the popular first-selected vehicles.LED, as a kind of novel illumination light source, has the advantage of energy-conserving and environment-protective, and its excellent anti-seismic performance is applicable to railway carriage illumination very much.Not yet being applied to rail vehicle transportation aspect is because LED can not directly use electric main to power, if can develop special control system realize its on vehicle illumination application, at electric energy saving, the income in environmental protection will be known no measure.Given this, a kind of rail vehicle LED illumination control system is urgent need in the industry.

Summary of the invention:

The present invention relates to a kind of rail vehicle LED illumination control system, its composition comprises with Single Chip Microcomputer (SCM) system 1 for control core, vehicle environment brightness information brightness Acquisition Circuit 201 in ambient brightness acquisition module 2 collected converts analog quantity to digital quantity by modulus conversion chip ADC0809 202 and sends Single Chip Microcomputer (SCM) system 1 to, the information obtained is stored row relax of going forward side by side by STC89C51 single-chip microcomputer 101, according to the strong and weak information of the exterior light received calculate applicable carlighting light luminance after, externally LED drive circuit 3 sends dimming information, after the digital information received processes by outside LED driver PT4107301, carry out the light modulation to LED, and then control the LED illumination brightness of whole compartment, advantage of the present invention and effect are that this system takes full advantage of that the efficiency that LED illumination has is high, the life-span long, resistance to shock is good and the advantage of environmental protection, meets the requirement of rail vehicle to present lighting control system.With STC89C51 single-chip microcomputer 101 for control core, carry out main frame by serial ports and from the communication between machine, achieve the good interchange of information.The control of collection realization to carlighting brightness of vehicle environment brightness is carried out by ambient brightness acquisition module 2.Devise constant current mode LED alternating-current driver based on PT4107 driving chip 301, meet the driving requirement of LED illumination.

Accompanying drawing illustrates:

Fig. 1 is rail vehicle LED illumination control system structural representation of the present invention;

Fig. 2 is Systematical control core circuit figure in Fig. 1;

Fig. 3 is signal acquisition circuit figure in Fig. 2;

Fig. 4 is LED drive circuit figure in Fig. 1;

Embodiment:

1. consult Fig. 1, Fig. 2, Fig. 3, Fig. 4, rail vehicle LED illumination control system involved in the present invention with Single Chip Microcomputer (SCM) system 1 for control core, vehicle environment brightness information brightness Acquisition Circuit 201 in ambient brightness acquisition module 2 collected converts analog quantity to digital quantity by modulus conversion chip ADC0809 202 and sends Single Chip Microcomputer (SCM) system 1 to, the information obtained is stored row relax of going forward side by side by STC89C51 single-chip microcomputer 101, according to the strong and weak information of the exterior light received calculate applicable carlighting light luminance after, externally LED drive circuit 301 sends dimming information, after the digital information received processes by outside LED driver PT4107 301, carry out the light modulation to LED, and then control the LED illumination brightness of whole compartment.

2. consult Fig. 2, Fig. 3, ambient brightness acquisition module 2 is a kind of signal acquisition circuit mainly, circuit includes altogether three parts, brightness Acquisition Circuit 201, modulus conversion chip ADC0809 202, provides 4 frequency dividing circuit 74L,S74 203 of pulse signal for ADC0809 202; The course of work of this ambient brightness acquisition module 2 is after the light intensity signal that collects in compartment of brightness Acquisition Circuit 201, this analog signal is passed to modulus conversion chip ADC0809 202 and converts digital quantity to, then the digital quantity of conversion will be sent to the P0 mouth of single-chip microcomputer STC89C51 101 by modulus conversion chip ADC0809 202 by D0 ~ D7 pin; Because single-chip microcomputer STC89C51 101 external crystal-controlled oscillation fixed frequency used is 2MHZ, can not meet the requirement that ADC0809 202 operating frequency is hundreds of KHZ, therefore the pulse signal adopting the circuit 74L,S74 203 of 4 frequency divisions to produce 500KHZ uses for ADC0809.

3. consult Fig. 4, driver PT4107 301 realizes the regulation and control to LED luminosity, specific works process is that the PWM digit pulse dimming information of the variable duty ratio that single-chip microcomputer STC89C51 101 P3 mouth exports is input in driving chip PT4107 301 pin 6 light modulation Enable Pin PWMD, realizes regulating LED luminosity by controlling variable duty ratio; Meanwhile, controlled the conducting of outside metal-oxide-semiconductor by driving chip PT4107 301, realize the control of the light on and off of LED; In order to prevent abnormal overvoltage to the infringement of circuit, devising the anti-surge protection circuit in Fig. 4, utilizing the valve characteristic of piezo-resistance, can well achieve superpotential protection; Because LED driver PT4107 301 is switching circuit, this just inevitably produces the problem of electromagnetic interference, in addition, rectification circuit, high frequency transformer etc. all easily cause the problem of electromagnetic interference, therefore devise filter circuit in Fig. 4 to eliminate electromagnetic interference.

Claims

1. rail vehicle LED illumination control system is characterized in that with Single Chip Microcomputer (SCM) system (1) for control core, vehicle environment brightness information brightness Acquisition Circuit (201) in ambient brightness acquisition module (2) collected converts analog quantity to digital quantity by modulus conversion chip ADC0809 (202) and sends Single Chip Microcomputer (SCM) system (1) to, the information obtained is stored row relax of going forward side by side by STC89C51 single-chip microcomputer (101), according to the strong and weak information of the exterior light received calculate applicable carlighting light luminance after, externally LED drive circuit (3) sends dimming information, outside LED driver PT4107(301) digital information received is processed after, carry out the light modulation to LED, and then control the LED illumination brightness of whole compartment.

2. rail vehicle LED illumination control system according to claim 1, it is characterized in that ambient brightness acquisition module (2) mainly a kind of signal acquisition circuit, circuit includes altogether three parts, brightness Acquisition Circuit (201), modulus conversion chip ADC0809(202), be ADC0809(202) 4 frequency dividing circuit 74LS74(203 of pulse signal are provided); The course of work of this ambient brightness acquisition module (2) is after brightness Acquisition Circuit (201) collects the light intensity signal in compartment, this analog signal is passed to modulus conversion chip ADC0809(202) and convert digital quantity to, then modulus conversion chip ADC0809(202) will be sent to the P0 mouth of single-chip microcomputer STC89C51 (101) by D0 ~ D7 pin; Due to single-chip microcomputer STC89C51(101 used) external crystal-controlled oscillation fixed frequency is 2MHZ, can not meet ADC0809(202) operating frequency is the requirement of hundreds of KHZ, therefore adopts the circuit 74LS74(203 of 4 frequency divisions) produce the pulse signal of 500KHZ; 74LS74(203) be actually an integrated double D trigger, and be that rising edge clock triggers; ADC0809(202) be made up of 8 path analoging switch, an address latch and decoder, an A/D converter and a ternary output latch, variable connector can gating 8 analog channels, allow 8 tunnel analog quantity timesharing inputs, sharing A/D transducer is changed, the digital quantity that ternary output latch converts for latching A/D, when OE end is for high level, just can take from ternary output latch the data converted away.