KR20000030581A - Femaining time display device of traffic light - Google Patents

Abstract

PURPOSE: A remaining time indication lamp of a signal lamp for a pedestrian and a moving vehicle is provided to blink sequentially each lamp of a blinker according to a remaining time by using a photo diode for generating an electrical signal. CONSTITUTION: A remaining time indication lamp of a signal lamp for a pedestrian and a moving vehicle comprises a reference clock generator portion(3), a light receiving portion(1), a signal period time setting portion(2), a clock divider portion(4), a buffer portion(5), a memory portion(6), a memory control portion(7), a driving control portion(8), a lamp driving portion(9), and a group of lamp(10).

Description

Remaining time indicators for pedestrian and driving vehicle traffic lights {Femaining time display device of traffic light}

Remaining time of warning lights for pedestrians and driving vehicles to prevent traffic lights.In particular, a plurality of light emitting lamps are sequentially generated according to the lighting time of green lights by automatically detecting / remembering flashing times of pedestrians and driving vehicles traffic lights, ie, green lights. It is configured to blink in order to make it easier for pedestrians and driving vehicles to recognize the remaining time of the green light. The present invention relates to the remaining time warning lights of pedestrian and driving vehicle traffic lights that can effectively prevent traffic accidents at intersections.

A general traffic light installed at a crosswalk is a green walking light and a red stop light, and a general traffic light at an intersection is a red stop light, a left turn of a green direction sign, and a green running light.

Such a conventional traffic light is operated in such a way that a green walking light and a vehicle driving signal light are turned on and a red stop light is turned on again after a predetermined time has elapsed.

However, these pedestrian traffic lights were very uncomfortable and dangerous in terms of pedestrians.

For example, if you waited for a signal in front of a crossing and crossed the street after the pedestrian lights were on, the pedestrian could not know when the pedestrian lights would turn off and the stop lights would turn on while crossing the roadway. In addition, pedestrians crossing the crosswalk late after seeing a light that is already lit may become more anxious and rush in a hurry and cause a big accident.

For this reason, the green pedestrian lights are turned on and then flashing after a certain time has been devised.However, the blinking of the pedestrian lights cannot inform the general pedestrians of the remaining time of the pedestrian traffic lights. It could not help much in preventing accidents.

Proposed to overcome this problem is the remaining time indicators of pedestrian traffic lights attached to the test next to some traffic lights in the city.

The remaining time indicator of the conventional pedestrian traffic light is formed so that a plurality of light emitting lamps are arranged vertically, so that the pedestrian lights are sequentially turned on at regular time intervals after the pedestrian light is turned on. Therefore, this allows pedestrians to know the remaining time of the pedestrian lights by looking at the flashing lamps in turn and to effectively prevent pedestrian crossing traffic accidents caused by unknown duration of the pedestrian lights. The preventable effect can be expected.

However, the remaining time indicator of such a conventional pedestrian traffic light has been fixed / set the blinking time interval of the lamp, and if it is necessary to change the lighting time of the pedestrian lamp, if necessary, the remaining time indicator of the time indicator is arbitrarily changed accordingly. Even if it is difficult or possible to do it, there are disadvantages that can only be achieved through extremely demanding and cumbersome hardware work.

In addition, the remaining time indicator of a conventional pedestrian traffic signal is difficult to reliably determine the number of unlit lamps for a pedestrian at a relatively long distance or a pedestrian with poor visual acuity. There are inadequate disadvantages in providing information.

The present invention has been proposed to solve the problems of the prior art, by using a photodiode that receives the light of red and green light and generates an electric signal accordingly to recognize the lighting time of the vehicle driving signal and the pedestrian traffic light and the memory Pedestrian and vehicle traffic lights that memorize the blinking cycles of pedestrian traffic lights and driving vehicle traffic lights automatically based on this after one normal pedestrian traffic light and vehicle driving traffic signal flashes. Its purpose is to provide the remaining time indicator light.

The remaining time warning light of the pedestrian and the vehicle traffic light of the present invention to achieve the above object includes a reference clock generator for generating an arbitrary reference clock; A light-receiving unit for receiving light that is inclined from the red light and the green light of the traffic light to generate detection signals of red light and green light, respectively; A signal cycle time setting unit for receiving a red light detection signal and a green light detection signal from a light receiving unit and recognizing a flashing cycle of a traffic light based on a reference clock; A clock divider which receives a reference clock from the reference clock generator and outputs a clock for controlling the memory; A buffer unit which outputs the signal period setting value output from the signal period time setting unit in synchronization with the reference clock; A memory unit for storing the signal period setting value output from the buffer unit; A memory control unit which receives a clock for controlling the memory unit from the clock divider and controls input / output of the memory unit; A driving controller which receives a signal period setting value from the memory unit and outputs a control signal in synchronization with a clock output from the ramp unit; A lamp driver for outputting a lamp drive signal in synchronization with a reference clock according to a control signal output from the drive controller; And a lamp group consisting of a plurality of warning lamps flashing in accordance with the lamp drive signal output from the lamp driver.

1 is a block diagram showing the configuration of the present invention;

2 is a use state diagram showing an embodiment in which the present invention is installed in a crosswalk.

3 is a use state diagram illustrating an embodiment in which the present invention is installed at an intersection.

Explanation of symbols on the main parts of the drawings

1: light receiver 2: signal cycle time setting unit

3: reference clock generator 4: clock divider

5: buffer section 6: memory section

7: memory control unit 8: driving control unit

9: lamp driving unit 10: lamp group

Hereinafter, the technical configuration and operation of the present invention will be described with reference to FIGS. 1, 2, and 3.

1 is a block diagram showing the internal configuration of the remaining time warning lights of the pedestrian and the vehicle traffic light according to the present invention.

The remaining time warning indicators for pedestrian and traveling vehicle traffic lights according to the present invention include a reference clock generator 3 for generating an arbitrary reference clock; A light-receiving unit 1 for receiving the light that is inclined from the red light (stop light) and the green light (walking light) of the traffic light to generate detection signals of red light and green light, respectively; A signal cycle time setting section 2 for receiving the red light detection signal and the green light detection signal from the light receiving section 1, respectively, based on the reference clock generated by the reference clock generation section 3, and recognizing the blinking period of the walking light; A clock divider 4 which receives a reference clock from the reference clock generator 3 and outputs a clock for controlling the memory; A buffer unit 5 which outputs the signal period setting value output from the signal period time setting unit 2 in synchronization with a reference clock; A memory unit 6 for storing the signal period setting value output from the buffer unit 5; A memory control unit 7 which receives a memory control clock from the clock divider 4 and controls input and output of the memory unit 6; A driving controller 8 which receives a signal period setting value from the memory unit 6 and outputs a control signal in synchronization with a clock output from the buffer unit 5; A lamp driver 9 for outputting a lamp drive signal in synchronization with a reference clock in accordance with a control signal output from the drive controller 8; It consists of a lamp group 10 consisting of a plurality of light lamps flashing in accordance with the lamp drive signal output from the lamp driver 9.

The light-receiving part 1 of this invention is comprised using the optical sensor, such as the photodiode, etc. which respond to red light and green light of a traffic light, respectively. That is, the first photodiode reacts when the green light is received and the second photodiode reacts when the red light is received, which generates an electric signal related to the blinking of a traffic light.

In addition, the signal cycle time setting unit 2 of the present invention receives the information related to the blinking of the traffic light from the light receiving unit 1 and operates to recognize the blinking period of the traffic light. That is, the detection signal of the red and green light generated from the first and second photodiodes responding to the flashing of the walking light and the stop light, respectively, is recognized. Therefore, the signal cycle time setting unit 2 causes the reference voltage generator 3 to be detected. The generation and maintenance periods of the detection signals such as walking and stopping can be recognized based on the reference clock input from the controller.

The clock divider 4 of the present invention receives a reference clock from the reference clock generator 3, shapes a waveform, and outputs a clock for memory control.

Further, the buffer unit 5 of the present invention outputs the signal period setting value output from the signal period time setting unit 2 to the input of the memory unit 6 in synchronization with the reference clock.

Therefore, the memory unit 6 stores the signal period setting value output from the buffer unit 5, that is, information corresponding to the lighting cycles of the walking light and the driving vehicle signal. At this time, the lighting cycle of the pedestrian light and the traveling vehicle traffic signal stored in the memory unit 6 is not an arbitrary value but an experimental value of the existing traffic light, and the pedestrian lighting of the traffic light and the stop light blinking time of the traveling vehicle traffic light are necessary. Even if it depends, the cycle is always stored correctly in the memory unit 6 through one experiment.

The memory controller 7 receives a clock for memory control from the clock divider 4 to control input / output of the memory unit 6, and the driving controller 8 corresponds to a signal period setting value output from the memory unit 6. It is determined to match the signal output from the buffer unit 5 with the signal to be output and a control signal for controlling the ramp driver 9 is output.

In this way, in response to the control signal output from the drive control unit 8, the lamp drive unit 9 lights a plurality of warning lamps constituting the lamp group 10 in synchronization with the reference clock and the lighting period of the walking signal light and the traveling vehicle signal light. While blinking at regular time intervals.

As described above, according to the present invention, even if the flashing period of the traffic light is arbitrarily changed, the pedestrian light and the remaining time warning light of the traveling vehicle can be sequentially operated in accordance with the lighting cycle of the pedestrian light and the vehicle running light without any extra effort. do.

In addition, some of the beacon lamps flickering at the last point of the lamp group of the present invention, which is composed of a plurality of beacon lamps, are configured to be lamps that warn other lights from the remaining beacons, and cause pedestrians and vehicles to drive. It has the effect of causing alarm.

2 and 3 is a state diagram showing an embodiment of the remaining time warning lights of the pedestrian and driving vehicle traffic lights according to the present invention.

As shown in Figs. 2 and 3, for example, in the case of a lamp group consisting of nine warning lamps, pedestrians are relieved while six green lamps out of the nine lamps flash in sequence at regular time intervals. You can cross the road with ease, and the vehicle will pass through the crossroads. When configured with a ramp, pedestrians and crossroads entering the road can safely cross the street and pass through it, and other pedestrians and vehicles can wait for the next signal without forcibly crossing the road. . In addition, if a lamp that is turned on at the last point of time by using lamps of the same color is configured, even the pedestrians and drivers whose vision of the pedestrian or the driving vehicle at a relatively long distance do not have good vision, By providing the information on the remaining time of the pedestrian traffic light and the driving vehicle traffic light not only by the color of the lamp, but also to provide information on the remaining time of the pedestrian traffic light and the traveling vehicle traffic signal more accurately than before.

As described above, the remaining time warning light of the pedestrian and the vehicle traffic light according to the present invention can automatically adjust the lighting interval of the remaining time indicator lamp in response to the flashing cycle of the traffic light to reduce the inconvenience of resetting the lighting interval There is a convenient effect that can be given, and the lamp which is lit at the last time among the plurality of warning lamps is more noticeable to pedestrians, and by using a lamp of the same color as the other lamps so as to cause an alarm, As a result, it is possible to provide information on the remaining time of the correct pedestrian traffic light and the driving vehicle traffic light in advance.

Claims (2)

A reference clock generator for generating an arbitrary reference clock; A light-receiving unit for receiving light that is inclined from the red light and the green light of the traffic light to generate detection signals of red light and green light, respectively; A signal cycle time setting unit for receiving a red light detection signal and a green light detection signal from the light receiving unit and recognizing a flashing cycle of a traffic light based on the reference clock; A clock divider which receives a reference clock from the reference clock generator and outputs a clock for controlling a memory; A buffer unit which outputs the signal period setting value output from the signal period time setting unit in synchronization with a reference clock; A memory unit for storing the signal period setting value output from the sound buffer unit; A memory controller which receives a memory control clock from the clock divider and controls input / output of the memory unit; A driving controller which receives a signal period setting value from the memory unit and outputs a control signal in synchronization with a clock output from the ramp unit; A lamp driver for outputting a lamp driving signal in synchronization with the reference clock according to a control signal output from the driving controller; And a lamp group comprising a plurality of warning lamps which flash in sequence according to the lamp driving signal output from the lamp driver. The method according to claim 1, Among the plurality of warning lamps constituting the lamp group, the remaining lamps of the pedestrian and driving vehicle traffic light, characterized in that some of the lamps that are turned on at the last time is made of a lamp of the same color as the remaining lamps.