CN202677623U

CN202677623U - Novel device for realizing automatic control of traffic light brightness

Info

Publication number: CN202677623U
Application number: CN 201220074213
Authority: CN
Inventors: 陈乙周
Original assignee: SHENZHEN RONGHENG ENGINEERING Co Ltd
Current assignee: SHENZHEN RONGHENG ENGINEERING Co Ltd
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2013-01-16
Anticipated expiration: 2022-03-01

Abstract

The utility model discloses a novel device for realizing automatic control of traffic light brightness. The device comprises traffic lights, an MCU controller, a power supply circuit, a light-operated and reset circuit, wherein the MCU controller is connected with the traffic lights through the power supply circuit. The device is further provided with a real-time clock circuit. Display performance of the traffic signal lights can be improved greatly without highly increasing the cost of hardware circuit design, and brightness display of the traffic lights is enabled to better meet time requirements of human eyes, thereby improving the safety of transportation, and realizing energy conservation and emission reduction; and meanwhile, the traditional simple installation and debugging mode of the traffic signal lights can be maintained, thereby realizing a qualitative leap in performance without increasing additional cost.

Description

Implement device is controlled in a kind of Novel traffic light brightness automatically

Technical field

The utility model relates to the traffic control field of road traffic, is specifically related to a kind of Novel traffic light brightness and automatically controls implement device.

Background technology

Existing traffic lights are generally the lattice luminous dish that the LED luminotron forms, and its inside is by direct voltage drive; Because the direct supply voltage of existing traffic lights inside is normally fixed, so traffic lights display brightness at any time all makes fixing, when leading outdoor light dimmed night, the luminosity of traffic lights does not reduce, therefore the brightness meeting of traffic lights is excessive, easily cause the dazzling sensation of automobile driver vision, have hidden trouble of traffic; Simultaneously, the brightness that the traffic lights at night are excessive also can cause unnecessary waste of energy, is unfavorable for energy-saving and emission-reduction.For the shortcoming of existing traffic lights display brightness, following improvement is proposed:

A) improve the automatic control mode that is controlled to be that the brightness of traffic lights lamp shows.

B) automatically according to the brightness output of sun set/raise time control traffic lights, brightness raises at sunrise, and post sunset brightness reduces.

To the auxiliary photosensitive control of time of post sunset, reduce gradually according to the brightness that reduces gradually meticulous control traffic lights of the outdoor optical line strength of post sunset.

The utility model content

The utility model addresses the above problem provides a kind of Novel traffic light brightness automatically to control implement device, different and the different date in season for the residing longitude and latitude in different geographic position, sun set/raise time also different the present invention adopts the RTC Real Time Clock System automatically to calculate local road time sunrise day, according to the variation that sun set/raise time replaces, the traffic lights brightness control system more carries out brightness with the variation of road time sunrise day and automatically controls.

For addressing the above problem, the utility model is realized by following scheme: implement device is controlled in a kind of Novel traffic light brightness automatically, this device comprises traffic lights, the MCU controller, power circuit, light-operated and reset circuit, described MCU controller connects traffic lights by power circuit, this device also is equipped with real-time timepiece chip, this device is transformed into the digital signal that the MCU controller can be identified by the light intensity signal of simulation, calculate the driving voltage of the LED luminous component needs of traffic lights according to the current environment light intensity meter, the output voltage of the LED luminous component of traffic lights is controlled accurately.

Be connected with photoresistance on the described light-operated and reset circuit.

Described traffic lights comprise several LED assemblies.

Described real-time timepiece chip connects clock circuit.

The utility model namely can improve the display performance of traffic lights traffic lights greatly on the cost that need not increase too large hardware circuit design, make the brightness of traffic lights show the time requirement that better meets human eye, improve the security of traffic trip, and realize energy-saving and emission-reduction; Simultaneously, can keep again the succinct installment and debugging mode of traditional traffic lights constant, realize qualitative leap on the performance thereby realize not increasing extra cost.

Below be in conjunction with embodiment and description of drawings the utility model to be further described:

Description of drawings

Fig. 1 is the utility model process flow diagram;

Fig. 2 is the utility model control flow chart;

Fig. 3 is the utility model circuit theory diagrams.

Embodiment

As shown in Figure 1, implement device is controlled in a kind of Novel traffic light brightness automatically, this device comprises traffic lights, MCU controller, power circuit, light-operated and reset circuit, described MCU controller connects traffic lights by power circuit, this device also is equipped with real-time timepiece chip, this device is transformed into the digital signal that the MCU controller can be identified by the light intensity signal of simulation, calculate the driving voltage of traffic lights LED luminous component needs according to the current environment light intensity meter, the output voltage of the LED luminous component of traffic lights is controlled accurately.

Behind the starter gear, read real-time timepiece chip time system data, according to the date time inquiring database that reads, calculate the sun set/raise time point by the MCU controller again:

When sunrise during the time period, outside light intensity grow, the MCU controller is adjusted the Control of Voltage pwm signal of signal lamp efferent, and output voltage is strengthened gradually, and traffic lights brightness is adjusted automatically.

When sunrise during the time period, outside light intensity dies down, and the MCU controller is adjusted the Control of Voltage pwm signal of signal lamp efferent, and output voltage is reduced gradually, and traffic lights brightness is adjusted automatically.

Such as Fig. 2, shown in Figure 3, read the current date and time of real-time timepiece chip U4 inside by MCU U3 Simulation with I 2C bus, go out the sunrise sunset moment point in current traffic lights geographic position of living in by MCU U3 internal database query count, judge that traffic lights are about to enter the pattern of working by day or are about to enter the mode of operation at night.

By resistance R 9, R7, RL1 (photoresistance), the bleeder circuit that R10 consists of, when environmental light intensity changes, the resistance of RL1 can change, light intensity is stronger, the resistance of RL1 is less, then the RL1 resistance is larger on the contrary, therefore namely react the light intensity of external environment condition at R9 upper end sampled voltage by the AD ALT-CH alternate channel ADC0 of MCU U3, when outside light intensity larger, the voltage of R9 upper end is less, otherwise then larger, reads this magnitude of voltage and passes through the in house software intelligence computation by MCU, traffic light system can the illumination of self-perception external environment condition intensity, for traffic lights brightness automatically control the data foundation is provided.

The brilliance control of traffic lights depends on that traffic lights show the input voltage of LED dot matrix " VLEDOUT " size of value, voltage is larger, and the brightness of traffic lights is higher, and voltage is less, and the brightness of traffic lights is lower.

By the AD of MCU U3 conversion by ADC1 by divider resistance R3, the voltage that R4 gathers the R4 upper end calculates the input voltage that traffic lights show the LED dot matrix by software again " VLEDOUT " value; Control voltage " VADJ " the control U1 output dc voltage that the RC network that the P1.3 of MCU U3 output PWM modulation signal forms to resistance R 11 and capacitor C 13 produces " VLEDOUT ".

Method and software: by the communication of MCU to RTC chip U4, obtain the current time on date, software is found out the sun set/raise time point of current geographic position, the traffic lights control model that enters day and night according to current date time comparison internal database; Enter the pattern of working by day when arriving sunrise time traffic lights, software increases the input voltage that traffic lights show the LED dot matrix gradually according to the outside light intensity data that obtains; Enter the mode of operation at night when arriving the sunset time traffic lights, software reduces the input voltage that traffic lights show the LED dot matrix gradually according to the outside light intensity data that obtains.

Claims

1. implement device is controlled in a Novel traffic light brightness automatically, it is characterized in that: this device comprises traffic lights, MCU controller, power circuit, light-operated and reset circuit, described MCU controller connects traffic lights by power circuit, and this device also is equipped with real-time timepiece chip.

2. implement device is controlled in Novel traffic light brightness according to claim 1 automatically, it is characterized in that: be connected with photoresistance on the described light-operated and reset circuit.

3. implement device is controlled in Novel traffic light brightness according to claim 1 automatically, it is characterized in that: described traffic lights comprise several LED assemblies.

4. implement device is controlled in Novel traffic light brightness according to claim 1 automatically, it is characterized in that: described real-time timepiece chip connects clock circuit.