CN101621873B - Intelligent driving system and energy-saving control method of street lamp based on LED array - Google Patents

Abstract

The invention discloses an intelligent drive system for street lamps based on an LED array, which includes a bridge rectifier circuit, a quasi-resonance inter-period DC/DC conversion circuit, an LED lighting module circuit, a current/voltage detection circuit, a photoelectric isolation circuit, a microprocessor and Microprocessor peripheral circuit, compared with the prior art, the street lamp intelligent drive system based on the LED array proposed by the present invention adopts the microprocessor to control and manage the photoelectric and thermal dynamic characteristics of the LED, which improves the working reliability of the LED and realizes Energy-saving purpose; the present invention also proposes a street lamp energy-saving control method, by making the LED street lamp intelligent drive system make real-time adjustments to the changes in light output characteristics caused by changes in external conditions such as working temperature, so as to achieve the best lighting effect and optimize the LED lighting effect. Lighting efficiency of street lighting systems.

Description

LED array-based street lamp intelligent drive system and street lamp energy-saving control method

technical field

The invention relates to an LED array-based street lamp intelligent drive system, and also proposes a street lamp energy-saving control method using the LED array-based street lamp intelligent drive system.

Background technique

With the continuous consumption of energy, the increasing scarcity of resources, and the increasingly significant harm of the greenhouse effect to human beings, the international calls for energy conservation and consumption reduction are getting louder and louder, and energy conservation has become the consensus of all countries. As early as 1996, our country officially launched the green lighting project, and proposed that the lighting project should save resources, prevent pollution, and benefit future generations. Through the joint efforts of all walks of life, semiconductor (LED) lighting products, which are the fourth generation of light sources, have developed by leaps and bounds, and have made remarkable achievements in energy saving.

White light-emitting diode (LED) is a highly efficient and environmentally friendly semiconductor electro-optical conversion light source. Compared with traditional light sources, it has many advantages, and it has received great attention especially in replacing high-power street lighting. At present, taking Chongqing City as an example, there are more than 200,000 street lamps in total, and the daily power consumption exceeds 1 million kWh. The average daily direct operating cost (electricity fee + operation and maintenance cost) of the street lamp system alone exceeds 600,000 yuan. However, if all LED urban lighting street lights are used, the electricity bill saved per day can reach 420,000 yuan, and the annual electricity bill can be saved as high as 150 million yuan. It can be seen that the direct economic benefits generated by the LED street lamp system every year are considerable. Therefore, LEDs street lighting has been listed as one of the important energy-saving and emission-reduction measures currently developed by the country.

High-power white LED lighting has complex driving characteristics: (1) Different LEDs require different operating voltages and driving currents; (2) When the driving current remains unchanged, the luminous flux decreases as the working time increases; (3) When the driving current is constant, the luminous flux decreases as the temperature increases. Therefore, it is of great significance to design an LED drive circuit with self-adaptive function to provide appropriate working voltage and drive current to ensure the relative stability of its output light intensity. The existing white LED street lamp driving technology mainly includes RC step-down and PWM switch constant voltage and constant current drive. Step-down and PWM switch constant voltage and constant current measures cannot be adjusted in time with changes in LED parameters, resulting in low drive efficiency and unstable current sharing.

At the same time, the application requirements for numerically controllable characteristics of LED light sources are also increasing, and traditional LED driving strategies have greatly restricted the application of LEDs in this area.

Contents of the invention

In view of this, the present invention provides an intelligent driving system for street lamps based on LED arrays. The system includes a microprocessor controller, quasi-resonant cross-cycle topology, photoelectric thermal dynamic detection and multiple intelligent outputs to realize constant current driving of LEDs. It has numerical controllability, high efficiency, adaptive constant current regulation and wide voltage input range. , Overvoltage protection function. At the same time, it adopts slow start, junction temperature, external light intensity, traffic statistics information collection and parameter matching procedures, and light attenuation compensation to realize energy-saving control of street lamps.

One of the purposes of the present invention is to propose an intelligent drive system for street lamps based on LED arrays. The isolation circuit, the microprocessor and its peripheral circuits, after the input mains power is rectified by the bridge rectifier circuit, multiple outputs are realized through the quasi-resonant inter-period DC/DC conversion circuit, and the quasi-resonant inter-period DC/DC conversion circuit is passed The feedback circuit is connected to the microprocessor, and the current/voltage detection circuit is connected to the output terminal of the quasi-resonant inter-period DC/DC conversion circuit, and the relevant signals detected by the current/voltage detection circuit are sent to the microprocessor for further processing through the photoelectric isolation circuit. Processing, used to control the quasi-resonant inter-cycle DC/DC conversion circuit to achieve stable output; the LED lighting module circuit has at least two circuits and is connected to the corresponding control port of the microprocessor respectively, and the ambient light detection circuit and the junction temperature The detection circuit detects the intensity of ambient light and the working temperature of the LED module, and sends the detection results to the microprocessor for processing to realize the intelligent energy-saving control of the LED lighting module.

Further, the LED lighting module circuit includes LEDs, MOS tubes, diodes, triodes, collector resistors, base resistors, gate resistors, and source resistors. The emitters of the triodes are directly grounded, and the collectors of the triodes are connected to the input terminal of the auxiliary power supply, the base of the triode is connected to the corresponding control port of the microprocessor through the base resistor, the gate of the MOS tube is connected to the collector of the triode through the grid resistor, and the The source is grounded through a source resistor, the anode of the LED is connected to the input terminal of the main power supply, and the cathode of the LED is connected to the drain of the MOS tube to form a PWM driving circuit for the LED;

Further, the drive circuit also includes a stabilized voltage source low-voltage output circuit, the stabilized voltage source low-voltage output circuit includes a voltage stabilizer, capacitors C1, C2, C3 and C4, and the input terminal of the voltage stabilizer is connected to the quasi-resonant cross-cycle The low-voltage output terminals of the DC/DC conversion circuit are connected, the C1 and C2 are connected in parallel between the input terminal of the voltage regulator and the ground, and the C3 and C4 are connected in parallel between the output terminal of the voltage regulator and the ground. The voltage regulator provides +5V working power to the microcontroller and its peripheral circuit chips;

Further, the microprocessor is a single-chip microcomputer STC2051ad, and the LED lighting module circuit has four circuits, which are respectively connected to the P1.4-P1.7 pins of the single-chip microcomputer STC2051ad, and the P1.4-P1.7 pins are LED The PWM control input port of the lighting module circuit;

Further, the P3.7 pin of the single-chip microcomputer STC2051ad is connected with a light-emitting diode D5, the negative pole of the light-emitting diode D5 is connected with the P3.7 pin, and the positive pole is connected to the working power supply of +5V through the resistor R1, and the light-emitting diode uses To indicate the working status of the LED module;

Further, the junction temperature detection circuit includes a thermistor R3, a resistor R10, and a terminal J6. One end of the thermistor R3 is connected to a +5V working power supply through the terminal, and the other end is grounded through the terminal and the resistor R10. The detected signal is sent to the P1.0 pin of the single-chip microcomputer STC2051ad to realize real-time detection of the LED working temperature;

Further, the ambient light detection circuit includes a light intensity detection chip APD9003 and a resistor R11, the VCC terminal of the light intensity detection chip APD9003 is connected to a +5V working power supply, and the OUT terminal of the light intensity detection chip APD9003 is grounded through the resistor R11 and Send the detected signal to the P1.1 pin of the single chip microcomputer STC2051ad to realize the detection of the ambient light intensity;

Further, the peripheral circuit of the single-chip microcomputer includes a clock circuit, a clock pulse circuit, an infrared communication circuit, and an RS232 serial port communication circuit;

Described clock circuit comprises real-time clock chip DS1302S, crystal oscillator Y1 and standby power supply, and the SCLK pin, I/O pin, RST pin of described real-time clock chip DS1302S are respectively connected with the INT1 pin, T0 pin and T1 pin of single-chip microcomputer STC2051ad The pins are connected, the X1 and X2 pins of the real-time clock chip DS1302S are respectively connected to the two ends of the crystal oscillator Y1, the V _CC2 pin of the clock chip DS1302S is connected to the working power supply of +5V, and the V _CC1 of the clock chip DS1302S The pin is connected to a 3.6V standby power supply, and the clock circuit provides a definite time signal for the energy-saving control of the LED module;

The clock pulse circuit includes a crystal oscillator Y2 and two capacitors, the two ends of the crystal oscillator Y2 are respectively connected to a capacitor, the other end of the capacitor is grounded, and the two ends of the crystal oscillator Y2 are respectively connected to the XTAL1 and XTAL2 pins of the single-chip microcomputer STC2051ad , to provide clock pulses for the microcontroller;

The infrared communication circuit is completed by the infrared communication module 0388, the pin 1 of the external communication module 0388 is connected to the working power supply of +5V, the pin 2 is grounded, and the pin 3 is connected to the P3.2 pin of the single-chip microcomputer STC2051ad for passing Remote control device to realize the debugging of LED street lamps, the emergency switch lighting circuit and the restart of the microprocessor system;

The RS232 serial port communication terminal is connected between the pins P3.0 and P3.1 of the single-chip microcomputer STC2051ad, realizes the serial port communication with the computer, and completes work such as program update and download;

Further, the working mode of the LED lighting module can be set through the resistor R8, one end of the resistor R8 is grounded, the other end is connected to the power supply +5V and connected to the pin 1.2 of the single-chip microcomputer STC2051ad, and the LED non-intelligence is realized through high and low levels. /Smart working mode conversion.

The second object of the present invention is to provide an energy-saving control method for street lamps, which is realized by applying the LED array-based intelligent drive system for street lamps proposed by the first object of the invention. The specific implementation steps are as follows:

1) The microprocessor system is initialized, and the system determines whether to supply power to each LED lighting module circuit according to external instructions;

2) After confirming the power supply, judge whether it is in the intelligent mode. If it is not in the intelligent mode, the system enters the slow start state of starting up, and the output of each channel is gradually increased to the maximum value until the slow start is completed, and the output of each channel is in the state of maintaining the maximum power output. Go to step 4); if it is in smart mode, the system enters the slow start state of starting up, and obtains the external ambient light intensity value through the ambient light detection circuit, and combines this value to supply power to each LED lighting module circuit within the set time. The intensity changes linearly until the power supply intensity reaches the value corresponding to the light intensity value of the external environment;

3) After the slow startup is completed, the external ambient light intensity is continuously detected. When the external ambient light intensity reaches the set threshold, the system enters the full power output state;

4) In the state of full power output, the system detects the temperature of the LED lighting light source, and according to different light source temperatures, the system automatically selects the full power output multiple between 0.6 and 1 times;

5) After a certain period of time (determined by the system's own time system), the traffic volume gradually decreases, and the lamp head alternate working mode is adopted. According to the high-precision time system, the LED module performs constant light intensity alternate conversion work at fixed time intervals;

6) When the set shutdown time is reached, each output goes through the reverse startup process, and the system finishes supplying power to the LED lighting module circuit.

The beneficial effects of the present invention are:

Compared with the prior art, the intelligent driving system of LED array street lamps based on single-chip microcomputer control adopted by the present invention adopts the microprocessor to control and manage the photoelectric and thermal dynamic characteristics of LEDs, which improves the working reliability of LEDs and realizes the lighting of LED street lamps at the same time. further energy saving;

The street lamp energy-saving method proposed by the present invention adopts slow start, junction temperature, external light intensity, traffic statistics information collection, parameter matching procedures and light attenuation compensation method, which not only realizes energy-saving control of street lamps, but also greatly improves the work of LED street lamps Reliability; and make full use of the numerical controllability of LEDs, reflecting the adaptability of the LED street lighting system, so that it can make adaptive adjustments in real time to changes in external conditions such as ambient light intensity and working temperature, so as to achieve the best lighting Effect, and save energy, optimize the lighting efficiency of the LED street lighting system.

Other advantages, objects, and features of the present invention will be set forth in the ensuing description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or can be Learn from the practice of the invention. The objects and other advantages of the invention will be realized and attained by the following description and claims.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural block diagram of the street lamp intelligent drive system based on LED array of the present invention;

Fig. 2 is the circuit diagram of the street lamp intelligent driving system based on LED array of the present invention;

Fig. 3 is the circuit connection diagram of the voltage regulator source low-voltage output circuit;

Fig. 4 is a flow chart of the energy-saving control method for street lamps of the present invention.

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

As shown in Figure 1 and Figure 2, the LED array-based street lamp intelligent drive system of the present invention includes a bridge rectifier circuit, a quasi-resonant cross-cycle DC/DC conversion circuit, a current/voltage detection circuit, a photoelectric isolation circuit, and an LED lighting module Circuit, microprocessor and microprocessor peripheral circuit (the described bridge rectifier circuit, quasi-resonant cross-period DC/DC conversion circuit, current/voltage detection circuit, photoelectric isolation circuit are general circuits, not shown in the circuit diagram of Fig. 2 marked), the input mains power is rectified by a bridge rectifier circuit, and multiple outputs are realized through a quasi-resonant inter-period DC/DC conversion circuit, and the quasi-resonant inter-period DC/DC conversion circuit is connected to a microprocessor through a feedback circuit. The current/voltage detection circuit is connected to the output end of the quasi-resonant inter-period DC/DC conversion circuit, and the relevant signals detected by the current/voltage detection circuit are sent to the microprocessor for processing through the photoelectric isolation circuit.

In this embodiment, four LED lighting module circuits are designed, wherein the first LED lighting module circuit includes LED11, MOS tube Q1, diode D1, triode Q5, collector resistor R4, base resistor R9, gate resistor R12 and Source resistor R13, the positive pole of LED11 is connected to the positive side of the low-voltage output terminal of the quasi-resonant inter-period DC/DC conversion circuit, the negative pole of LED11 is connected to the drain of MOS transistor Q1, and the source of MOS transistor Q1 is connected to the source resistor R13 It is connected to the emitter of the triode Q5 and then grounded. The gate of the MOS transistor Q1 is connected to the secondary side of the low-voltage output terminal through the gate resistor R12 and the collector resistor R4. The junction of the gate resistor R12 and the collector resistor R4 is connected to the transistor Q5 The collectors are connected, and the base of the triode Q5 is connected with the corresponding control port of the microprocessor through the base resistor R9.

The second LED lighting module circuit includes LED2, MOS tube Q2, diode D2, triode Q6, collector resistor R5, base resistor R14, gate resistor R15 and source resistor R16; the third LED lighting module circuit includes LED3, MOS tube Q3, diode D3, triode Q7, collector resistor R6, base resistor R17, gate resistor R18 and source resistor R19; the fourth LED lighting module circuit includes LED4, MOS tube Q4, diode D4, triode Q8, The collector resistor R7, the base resistor R20, the gate resistor R21 and the source resistor R22, the connection structure of electrical components of each circuit is the same as that of the first LED lighting module circuit.

In this embodiment, the microprocessor uses STC2051ad as the single-chip microcomputer, and the 4 LED lighting module circuits are respectively connected to the P1.4-P1.7 pins of the single-chip microcomputer STC2051ad, and the P1.4-P1.7 pins are used as the LED lighting module circuit. PWM control input port.

As shown in Figure 3, the drive circuit also includes a voltage regulator low-voltage output circuit, the voltage regulator low-voltage output circuit includes a voltage regulator, capacitors C1, C2, C3, and C4, and the input terminal of the voltage regulator is connected to the quasi-resonant cross-cycle DC/ The secondary side of the low-voltage output terminal of the DC conversion circuit is connected, C1 and C2 are connected in parallel between the input terminal of the voltage regulator and the primary side of the low-voltage output terminal of the quasi-resonant cross-cycle DC/DC conversion circuit, and C3 and C4 are connected in parallel at the output of the voltage regulator Between the terminal and the main side of the low-voltage output terminal of the quasi-resonant cross-cycle DC/DC conversion circuit, the low-voltage output circuit of the voltage regulator provides a driving voltage of 5V for each chip of the system. The voltage regulator in this embodiment selects the voltage regulator chip 78L05.

The P3.7 pin of the single-chip microcomputer STC2051ad is connected with a light-emitting diode D5, the negative pole of the light-emitting diode D5 is connected with the P3.7 pin, and the positive pole is connected to the working power supply of +5V through the resistor R1. The light-emitting diode is used to indicate the LED module working status.

The peripheral circuits of the single-chip microcomputer include clock circuits, clock pulse circuits, infrared communication circuits, and RS232 serial port communication circuits;

The clock circuit includes a real-time clock chip DS1302S, a crystal oscillator Y1 and a backup power supply. The SCLK pin, I/O pin, and RST pin of the real-time clock chip DS1302S are respectively connected to the INT1 pin, T0 pin, and T1 pin of the single-chip microcomputer STC2051ad , the X1 and X2 pins of the real-time clock chip DS1302S are respectively connected to the two ends of the crystal oscillator Y1, the V _CC2 pin of the clock chip DS1302S is connected to the +5V working power supply, the V _CC1 pin of the clock chip DS1302S is connected to the 3.6V standby power supply, and the clock circuit Provide a definite time signal for LED module energy-saving control;

The clock pulse circuit includes a crystal oscillator Y2 and two capacitors. The two ends of the crystal oscillator Y2 are respectively connected to a capacitor, and the other end of the capacitor is grounded. The two ends of the crystal oscillator Y2 are also connected to the XTAL1 and XTAL2 pins of the single-chip microcomputer STC2051ad to provide clock pulses for the single-chip microcomputer;

The infrared communication circuit is completed by the infrared communication module 0388. The pin 1 of the external communication module 0388 is connected to the +5V working power supply, the pin 2 is connected to the ground, and the pin 3 is connected to the P3.2 pin of the single-chip microcomputer STC2051ad. Debugging of LED street lights and emergency switch lighting circuit and restart of microprocessor system;

The RS232 serial port communication terminal is connected between the pins P3.0 and P3.1 of the single-chip microcomputer STC2051ad to realize the serial port communication with the computer and complete the work of program update and download;

The working mode of the LED lighting module can be set through the resistor R8, one end of the resistor R8 is grounded, the other end is connected to the power supply +5V and connected to the pin 1.2 of the single-chip microcomputer STC2051ad, and the LED non-intelligent/intelligent working mode is realized through the high and low levels. .

The junction temperature detection circuit includes thermistor R3, resistor R10, and terminal J6. One end of the thermistor R3 is connected to +5V working power through the terminal, and the other end is grounded through the terminal and resistor R10. At the same time, the detected signal is sent to The P1.0 pin of the single-chip microcomputer STC2051ad realizes the real-time detection of the LED working temperature.

The ambient light detection circuit includes light intensity detection chip APD9003 and resistor R11. The VCC terminal of the light intensity detection chip APD9003 is connected to the +5V working power supply. The OUT terminal of the light intensity detection chip APD9003 is grounded through the resistor R11 and the detected signal is sent to the microcontroller. The P1.1 pin of STC2051ad realizes the detection of ambient light intensity.

According to the analysis of LED driving characteristics, it can be seen that (1) different LEDs require different operating voltages and driving currents; (2) when the driving current is constant, the luminous flux decreases as the working time increases; (3) When the driving current is constant, the luminous flux decreases with the increase of temperature. As a general lighting, LED must ensure that its output light intensity has relative stability to time and temperature. Therefore, the street lamp intelligent drive system of the present invention provides an appropriate operating voltage and drive current for the LED street lamp array by adopting an LED drive circuit with self-adaptive function, and makes it respond to changes in light output characteristics caused by changes in external conditions such as operating temperature. Adapt to the adjustment to achieve the best lighting effect.

As shown in Figure 4, according to the intelligent street lamp drive system of the present invention, the present invention also proposes a street lamp energy-saving control method, including the following steps:

1) The microprocessor system is initialized, and the system determines whether to supply power to each LED lighting module circuit according to external instructions;

2) After confirming the power supply, judge whether it is in the intelligent mode. If it is not in the intelligent mode, the system enters the slow start state of starting up, and the output of each channel is gradually increased to the maximum value until the slow start is completed, and the output of each channel is in the state of maintaining the maximum power output. Go to step 4); if it is in smart mode, the system enters the slow start state of starting up, and obtains the external ambient light intensity value through the ambient light detection circuit, and combines this value to supply power to each LED lighting module circuit within the set time. The intensity changes linearly until the power supply intensity reaches the value corresponding to the light intensity value of the external environment;

3) After the slow startup is completed, the external ambient light intensity is continuously detected. When the external ambient light intensity reaches the set threshold, the system enters the full power output state;

4) In the state of full power output, the system detects the temperature of the LED lighting light source, and according to different light source temperatures, the system automatically selects the full power output multiple between 0.6 and 1 times;

5) After the full power output state of the set time, the system's own timer time system realizes constant light intensity conversion every fixed time, that is, while the illumination light intensity of some LED lighting module circuits gradually increases, the rest Part of the lighting intensity decreases synchronously, and this conversion is alternately performed between two groups of LED lighting module circuits;

6) After the two groups of LED lighting module circuits work alternately after the set time, each output will go through the reverse boot process, and the system will end the power supply to the LED lighting module circuits.

The energy-saving control method of the present invention has the following characteristics:

1. It has two working modes: intelligent and non-intelligent. Realize the non-smart mode by setting the resistor R8=0, and the default is the smart mode;

2. Formulate and solidify the boot slow start. After the power is turned on, in the non-intelligent working state, the output intensity of each channel gradually increases from 0 to the maximum output value within the set time (customized by the user); in the intelligent working state, the high-performance ambient light detection circuit obtains the power-on time The external light intensity, combined with the ambient light intensity, each output gradually increases from 0 to an appropriate output value within a custom time;

3. Full power output state. In the non-intelligent working state, after the soft start is completed, each output remains at the maximum power output; in the intelligent working state, when the detected external light intensity decreases to the set value, the system enters the maximum power output, and at the same time Detect the temperature of the LED light source, if the working temperature exceeds 45 degrees (customizable), then 0.9 times (customizable) full power output, if it exceeds 50 degrees (customizable), then 0.8 times (customizable) full power output;

4. The lamp head works alternately. In the time period with low traffic volume, the lamp head alternate working mode is adopted, and the light head is alternately switched at regular intervals according to the high-precision time system. In the conversion process, a constant light intensity conversion method is adopted, that is, while the output of two LEDs gradually increases, the other two decrease synchronously.

The street lamp energy-saving method of the present invention fully embodies the adaptability of the LED street lamp lighting system, fully considers the change of light output characteristics caused by changes in external conditions such as external light and working temperature, and adopts "slow start" and "traffic flow statistics time" And the "alternating method between modules based on constant illuminance" can make the street lamps achieve the best utilization effect, save energy, and optimize the lighting efficiency of the LED street lamp system.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should be included in the scope of the claims of the present invention.

Claims (9)

1. based on the road lamp energy-saving control method of the street lamp intelligent driving system of led array; Said street lamp intelligent driving system based on led array; Comprise that bridge rectifier, quasi-resonance stride cycle DC/DC translation circuit, LED lighting module circuit, current/voltage testing circuit, photoelectric isolating circuit, microprocessor and peripheral circuit thereof; The civil power of input is after the bridge rectifier rectification; Stride cycle DC/DC translation circuit through quasi-resonance and realize multichannel output; Said quasi-resonance is striden cycle DC/DC translation circuit and is connected with microprocessor through feedback circuit; The current/voltage testing circuit is connected on the output that quasi-resonance is striden cycle DC/DC translation circuit, and the detected coherent signal of current/voltage testing circuit is sent into microprocessor through photoelectric isolating circuit and handled, and said LED lighting module circuit is at least two-way and is connected with the corresponding control port of microprocessor respectively;

Said drive system also comprises ambient light detection circuit and junction temperature testing circuit, and said ambient light detection circuit is connected with microprocessor with the junction temperature testing circuit;

It is characterized in that: may further comprise the steps:

1) microprocessor system initialization, system determines whether to give to each paths of LEDs lighting module circuit according to external command;

2) confirm to judge whether to be in intelligent mode to behind the electricity, if non intelligent pattern, system gets into the slow starting state of start, and each road output is increased to maximum to slow the startup gradually and accomplishes, and each road output gets into step 4) under the state that keeps maximum power output; If intelligent mode; System gets into the slow starting state of start, through ambient light detection circuit, obtains external environment condition light intensity value; In conjunction with being worth; In setting-up time, give electricity, be linear change, be worth corresponding numerical value until reaching to electric strength with the external environment condition light intensity to electric strength to each paths of LEDs lighting module circuit;

3) after the slow startup of start is accomplished, constantly detect the external environment condition light intensity, after the external environment condition light intensity reached preset threshold, system got into the total power output state;

4) at the total power output state, system detects LED lighting source temperature, and according to different light-source temperature, system selects the total power output multiple between 0.6～1 times automatically;

5) through after the total power output state of setting-up time; Timer time system by system self; Every at a distance from the set time, realize the constant intensity conversion, promptly when the illumination light intensity of partial L ED lighting module circuit increases gradually; The illumination light intensity of remainder reduces synchronously, and this conversion hockets between two groups of LED lighting module circuit;

6) through after two groups of LED lighting module circuit alternation of setting-up time, contrary start process is carried out in each road output, and system finishing is given to LED lighting module circuit.

2. be used to realize the street lamp intelligent driving system based on led array of the said method of claim 1; It is characterized in that: said microprocessor is single-chip microcomputer STC2051ad; Said LED lighting module circuit is four the tunnel; Insert P1.4～P1.7 pin of single-chip microcomputer STC2051ad respectively, said P1.4～P1.7 pin is the PWM control input end mouth of LED lighting module circuit.

3. the street lamp intelligent driving system based on led array as claimed in claim 2; It is characterized in that: said LED lighting module circuit comprises LED, metal-oxide-semiconductor, diode, triode, collector resistance, base resistance, resistance and source resistance; The direct ground connection of the emitter of said triode; Its collector electrode connects the accessory power supply input through collector resistance; The base stage of said triode is connected with the corresponding control port of microprocessor through base resistance, and the grid of said metal-oxide-semiconductor is connected through the collector electrode of resistance and triode, and the source electrode of said metal-oxide-semiconductor is through source resistance ground connection; The positive pole of said LED connects the main power source input, and the negative pole of said LED is connected with the drain electrode of metal-oxide-semiconductor.

4. the street lamp intelligent driving system based on led array according to claim 3; It is characterized in that: said drive system also comprises the source of stable pressure low-voltage output circuit; Said source of stable pressure low-voltage output circuit comprises pressurizer, capacitor C 1, C2, C3 and C4; The input of said pressurizer is striden cycle DC/DC translation circuit low-voltage output with quasi-resonance and is connected; Said C1, C2 are connected in parallel between the input and ground of pressurizer, and said C3, C4 are connected in parallel between the output and ground of pressurizer, and said pressurizer provides+working power of 5V to each chip of native system.

5. the street lamp intelligent driving system based on led array according to claim 4; It is characterized in that: the P3.7 pin of said single-chip microcomputer STC2051ad is connected with light-emitting diode D5; The negative pole of said light-emitting diode D5 is connected with the P3.7 pin; Anodal through resistance R 1 ground connection, be used for the operating state of indication LED lighting module.

6. the street lamp intelligent driving system based on led array according to claim 5; It is characterized in that: said junction temperature testing circuit comprises thermistor R3, resistance R 10, binding post J6; Said thermistor R3 one end connects+working power of 5V through binding post; The other end through resistance R 10 ground connection, is sent into detected signal the P1.0 pin of single-chip microcomputer STC2051ad through binding post J6 simultaneously, realizes that the LED working temperature detects in real time.

7. the street lamp intelligent driving system based on led array according to claim 6; It is characterized in that: said ambient light detection circuit comprises light intensity detection chip APD9003, resistance R 11; The working power of VCC termination+5V of said light intensity detection chip APD9003; The OUT of said light intensity detection chip APD9003 holds the P1.1 pin of also sending into detected signal single-chip microcomputer STC2051ad through resistance R 11 ground connection, realizes that ambient light intensity detects.

8. the street lamp intelligent driving system based on led array according to claim 7 is characterized in that: said SCM peripheral circuit comprises clock circuit, clock-pulse circuit and infrared communication circuit, RS232 serial communication circuit;

Said clock circuit comprises real-time timepiece chip DS1302S, crystal oscillator Y1 and stand-by power supply; The SCLK pin of said real-time timepiece chip DS1302S, I/O pin, RST pin are connected with INT1 pin, T0 pin and the T1 pin of single-chip microcomputer STC2051ad respectively; The X1 of said real-time timepiece chip DS1302S and X2 pin are connected the two ends of crystal oscillator Y1, the V of said clock chip DS1302S respectively _CC2Pin connects+working power of 5V, and the V of said clock chip DS1302S _CC1Pin connects the 3.6V stand-by power supply, and said clock circuit is that LED lighting module Energy Saving Control provides definite time signal;

Said clock-pulse circuit comprises crystal oscillator Y2 and two electric capacity; Said crystal oscillator Y2 two ends connect an electric capacity respectively; The other end ground connection of said electric capacity, the two ends of said crystal oscillator Y2 also connect XTAL1 and the XTAL2 pin of single-chip microcomputer STC2051ad respectively, for single-chip microcomputer provides clock pulse;

Said infrared communication circuit comprises infrared communication module 0388; The pin 1 of said outer communication module 0388 connects+operating voltage of 5V; Pin 2 ground connection, pin 3 connect the P3.2 pin of single-chip microcomputer STC2051ad, realize through the remote control of outside road lamp system being controlled; Said RS232 serial communication terminal is connected between the pin P3.0 and P3.1 of single-chip microcomputer STC2051ad, realizes communicating by letter with computer by serial.

9. the street lamp intelligent driving system based on led array according to claim 8; It is characterized in that: the mode of operation of said LED lighting module is set through resistance R 8; Said resistance R 8 one end ground connection; The working power of pin P1.2 that the other end is connected to single-chip microcomputer STC2051ad and+5V, through high-low level realize LED non intelligent/conversion of intelligent work pattern.

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