CN105188181A - LED illumination control system for railway vehicle - Google Patents
LED illumination control system for railway vehicle Download PDFInfo
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- CN105188181A CN105188181A CN201410251217.XA CN201410251217A CN105188181A CN 105188181 A CN105188181 A CN 105188181A CN 201410251217 A CN201410251217 A CN 201410251217A CN 105188181 A CN105188181 A CN 105188181A
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Abstract
The invention relates to an LED illumination control system for a railway vehicle, and belongs to the field of electrical engineering. The system makes the most of advantages of LED illumination: high efficiency, long service life, good resistance to shock and environment protection. The system is used in a car of the railway vehicle, and meets the requirements of the railway vehicle for a current illumination control system. The system can collect the ambient brightness information in the car, and can calculate the brightness suitable for the illumination of the car through processing, thereby achieving the intelligent regulation and control of the light intensity of the system. The system is novel in design, is innovative and unique, is sensitive in action, is low in manufacturing cost, and is good in use effect.
Description
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.
as a kind of novel illumination light source, there is the advantage of energy-conserving and environment-protective, and its excellent anti-seismic performance is applicable to railway carriage illumination very much.Not yet be applied to rail vehicle transportation aspect be due to
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 ADC0809202 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, 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 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 vehicle environment brightness of vehicle environment brightness is carried out by daylighting module.Devise constant current mode LED alternating-current driver based on PT4107 driving chip, 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. 1;
Fig. 4 is LED drive circuit figure in Fig. 1;
embodiment:
Embodiment one: 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 (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.
Embodiment two: consult Fig. 2, Single Chip Microcomputer (SCM) system (1) selects STC89C51 single-chip microcomputer (101); STC89C51 single-chip microcomputer (101) is the ISP(InSystemProgramming of employing 8051 core) programmable chip of system, most high workload clock frequency is 80MHz, what sheet included 8KBytes can the Flash read-only program memory of erasable 1000 times repeatedly, general 8 central processing units and ISPFlash memory cell is integrated with in chip, there is the characteristic of in-system programmable components (ISP), coordinate the control program of PC end the program code of user can be downloaded into single-chip microcomputer inside, eliminate purchase universal programmer, and speed is faster.
Embodiment three: consult 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 ADC0809202, provides 4 frequency dividing circuit 74LS74203 of pulse signal for ADC0809; 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 ADC0809202 and converts digital quantity to, then modulus conversion chip ADC0809202 will send the P0 mouth of single-chip microcomputer STC89C511 to by D0 ~ D7 pin; Because single-chip microcomputer STC89C511 external crystal-controlled oscillation fixed frequency used is 2MHZ.The requirement that ADC0809202 operating frequency is hundreds of HZ can not be met, therefore adopt the circuit 74LS74203 of 4 frequency divisions to produce the pulse signal of 500KHZ; 74LS74203 is actually an integrated double D trigger, and is that rising edge clock triggers; ADC0809202 is 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, and 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.
Embodiment four: consult Fig. 4, LED drive circuit 3 is made up of driving chip PT4107301 and peripheral circuit; Driving chip PT4107301 is a high pressure step-down LED drived control chip, supports the voltage range of 18V to 450V, can at the frequency ranges of operation of 20KHZ ~ 300KHZ; Controlled the conducting of outside metal-oxide-semiconductor by driving chip, single-chip microcomputer STC89C511 is exported dimming information, the namely PWM digit pulse of variable duty ratio imports Enable Pin, can realize the dimming function to LED.
Claims (4)
1. claim 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. claim 2: rail vehicle LED illumination control system according to claim 1, is characterized in that Single Chip Microcomputer (SCM) system (1) selects STC89C51 single-chip microcomputer (101); STC89C51 single-chip microcomputer (101) is the ISP(InSystemProgramming of employing 8051 core) programmable chip of system, most high workload clock frequency is 80MHz, what sheet included 8KBytes can the Flash read-only program memory of erasable 1000 times repeatedly, general 8 central processing units and ISPFlash memory cell is integrated with in chip, there is the characteristic of in-system programmable components (ISP), coordinate the control program of PC end the program code of user can be downloaded into single-chip microcomputer inside, eliminate purchase universal programmer, and speed is faster.
3. claim 3: 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), 4 frequency dividing circuit 74LS74(203 of pulse signal are provided for ADC0809); 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 (1) by D0 ~ D7 pin; Due to single-chip microcomputer STC89C51(1 used) external crystal-controlled oscillation fixed frequency is 2MHZ, can not meet ADC0809(202) operating frequency is the requirement of hundreds of HZ, 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, and 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.
4. claim 4: rail vehicle LED illumination control system according to claim 1, is characterized in that LED drive circuit (3) is made up of driving chip PT4107 (301) and peripheral circuit; Driving chip PT4107 (301) is a high pressure step-down LED drived control chip, supports the voltage range of 18V to 450V, can at the frequency ranges of operation of 20KHZ ~ 300KHZ; The conducting of outside metal-oxide-semiconductor is controlled, by single-chip microcomputer STC89C51(1 by driving chip) export dimming information, the namely PWM digit pulse of variable duty ratio imports Enable Pin, can realize the dimming function to LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251217.XA CN105188181A (en) | 2014-06-09 | 2014-06-09 | LED illumination control system for railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251217.XA CN105188181A (en) | 2014-06-09 | 2014-06-09 | LED illumination control system for railway vehicle |
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| Publication Number | Publication Date |
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| CN105188181A true CN105188181A (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410251217.XA Pending CN105188181A (en) | 2014-06-09 | 2014-06-09 | LED illumination control system for railway vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263210A (en) * | 2014-07-15 | 2016-01-20 | 长春职业技术学院（长春市职业技术教育中心长春市财政学校） | LED illumination control system for railway vehicles |
| CN108023513A (en) * | 2016-11-04 | 2018-05-11 | 德昌电机(深圳)有限公司 | Motor driving integrated circuit and electric machine |
| CN108055729A (en) * | 2017-12-27 | 2018-05-18 | 河南辉煌软件有限公司 | A kind of intelligent illuminating system on train |
-
2014
- 2014-06-09 CN CN201410251217.XA patent/CN105188181A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263210A (en) * | 2014-07-15 | 2016-01-20 | 长春职业技术学院（长春市职业技术教育中心长春市财政学校） | LED illumination control system for railway vehicles |
| CN108023513A (en) * | 2016-11-04 | 2018-05-11 | 德昌电机(深圳)有限公司 | Motor driving integrated circuit and electric machine |
| CN108055729A (en) * | 2017-12-27 | 2018-05-18 | 河南辉煌软件有限公司 | A kind of intelligent illuminating system on train |
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Application publication date: 20151223 |
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| WD01 | Invention patent application deemed withdrawn after publication |