KR20030091583A - A control method and displaying system for lighting uptime of traffic signal - Google Patents

Abstract

PURPOSE: An apparatus for displaying the remaining time of a traffic signal and a method for controlling the same are provided to easily install without changing or reconstructing the control box of a conventional traffic signal device. CONSTITUTION: An apparatus for displaying the remaining time of a traffic signal includes a voltage detection unit(32), a microcomputer(P), a memory device(34), an output controller(36) and a light emission display(LED)(38). The voltage detection unit(32) detects a stop light(22), a yellow light(24), a blue light(26) and a left turn light(28) of the traffic light(20), respectively. The microcomputer(P) calculates the remaining time of the traffic signal(20). The memory device(34) memorizes the time to be turn off and the time turned off and supplies the memorized data to the microcomputer(P). The output controller(36) controls the light emission display(LED)(38). And, the LED(38) is capable of counting the control of the output controller(36) by the blue light and the red light in response to the type of the signal and capable of displaying the signal in the form of character.

Description

A control method and displaying system for lighting uptime of traffic signal

The present invention relates to a display device and a method for controlling the remaining time of lighting of a traffic signal by displaying the signal lamp lighting time of the traffic signal, so that drivers and pedestrians can accurately recognize the timing of signal switching and prevent traffic accidents. In particular, the present invention relates to a lighting remaining time display device for a traffic signal displaying a remaining lighting time by learning a detection time of a voltage generated when a traffic light is turned on, and a control method thereof.

In general, traffic signals are installed at intersections or roads that require the control of vehicles and pedestrians. For example, intersection intersections include blue lights (left turn and straight), yellow lights, and red lights (stop).

Looking at the configuration of the general crossroad traffic signal in detail with reference to Figure 5, the traffic lights installed in each direction of the crossroad is controlled by a control box, the control box is a manual control or traffic volume change by the traffic police officer on site The controller is configured to control the remote control by the automatic control or road traffic control station applying the input signal period according to the set time period, and a relay for controlling the power supplied to each traffic light by the controller.

However, the general traffic signal causes a traffic accident because the driver and the pedestrian are not able to know exactly when the signal is switched. For example, when a vehicle driving at a high speed is approaching an intersection by a straight signal, the signal is changed. There was a problem of causing a crash accident by sudden braking, or driving by ignoring a signal and causing a crash accident.

On the other hand, in order to solve the above problems, a device for displaying the lighting remaining time of the traffic signal has been proposed several times, which will be described in more detail with reference to FIG.

In the case of the conventional display of the lighting time remaining of the traffic signal and its control method, the traffic light 120 is installed in each direction of the crossroad is controlled by the control box 110, the control box 110 is a manual control or automatic control Or a controller 115 that is remotely controlled, and a relay to control the power supplied to each traffic light 120 by the controller 115, and the controller 115 includes one side of each traffic light 120. The microcomputer 115a for counting the remaining lighting time is provided in the installed remaining time display device 130.

In addition, the controller 115 applies a signal lamp lighting period set appropriately according to the traffic volume and time zone by remote control or automatic control, and displays the remaining time of displaying the remaining signal lighting time corresponding to the signal lamp lighting cycle. The microcomputer 115a for controlling the 130 is controlled by the remote control or automatically controlled controller 115 or directly controlled from the remote or automatic control unit.

However, in this case, the microcomputer 115a for controlling the remaining time display device 130 is organically coupled with the controller 115 for controlling the traffic light lighting cycle, so that the remaining time display device 130 is applied to the existing traffic signal system. In order to install the conventional controller 115 had to replace or modify the problem.

In addition, since a wire provided to transmit a signal output from the microcomputer 115a to the remaining time display device 130 is connected to one or more remaining time display devices 130 from one control box 110, Considering that one control box 110 controls each direction traffic light 120 or more adjacent traffic lights (not shown) at a crossroad intersection and the wiring is buried underground, the wiring work is time-consuming and expensive. There was also a problem.

Therefore, according to the conventional device for indicating the remaining time of lighting of the traffic signal and the control method thereof, the control box 110 of the existing traffic signal must be replaced or modified, even though the necessity and the effect are recognized. Low, it consumes a lot of time and money, there is a problem that can not be practical.

On the other hand, the microcomputer 115a may be mounted inside the remaining time display device 130, but the time that the microcomputer 115a should be turned on from the controller 115 to be automatically controlled or remotely controlled, or is turned on separately. Receiving a period switching signal, or the time to be turned on directly from the remote or automatic control unit or the lighting cycle switching signal, the problem of enormous time and cost due to the wiring work is not solved, the control box 110 inside The controller 115 does not fundamentally solve the problem of modifying the control box 110 by receiving a time to be turned on or a lighting cycle switching signal.

An object of the present invention for solving the problems of the lighting remaining time display device and the control method of the conventional traffic signal as described above, the control box and the microcomputer to control the remaining time display device is mounted inside the remaining time display device The controller does not receive the time to turn on or turn on the switching cycle from the controller and automatic control unit or manual control unit or remotely provided, and detects the voltage applied to each signal from the power line of the signal line that is already wired. Another object of the present invention is to provide a lighting remaining time display apparatus and a control method of a traffic signal indicating a remaining lighting time of a traffic light by continuously learning the lighting time of a traffic light based on the time when the voltage is detected.

1 is a block diagram of a device for displaying the remaining lighting time of a traffic signal according to the present invention

2 is a block diagram of a device for displaying a lighting remaining time of a traffic signal according to the present invention;

3 is a control block diagram of a lighting remaining time display device of a traffic signal according to the present invention;

4A is a flowchart illustrating a control method according to an embodiment of the present invention.

Figure 4b is a flow chart showing a control method according to another embodiment of the present invention

4C is a flow chart showing a control method according to another embodiment of the present invention.

5 is a block diagram showing a general traffic signal

Figure 6 is a block diagram showing a lighting remaining time display device of a conventional traffic signal

* Description of the symbols for the main parts of the drawings *

S: Time to light up S ': Time to light up

10: control box 15: controller

20: traffic light 30: remaining time display device

32: voltage detector 34: memory device

36: output control unit 38: LED display board

P: Micom

With reference to the drawings the configuration of the display device and the control method of the remaining time of lighting of the traffic signal according to the present invention will be described in more detail.

1 is a block diagram showing a lighting remaining time display device of the traffic signal according to the present invention, Figure 2 is a block diagram showing a configuration of the remaining light display time of the traffic signal according to the present invention, Figure 3 is a traffic signal according to the present invention Is lit. Control block of remaining time display.

First, referring to FIG. 1, a configuration of a display device for displaying a lighting remaining time of a traffic signal according to the present invention is provided in a control box 10 and is input according to a manual control by a traffic police officer in a field or a change in traffic volume. The controller 15 receives remote control by an automatic control or a road traffic control station applying a predetermined signal cycle according to a set time period, and a plurality of traffic lights 20 supplied with power through a relay intermittent by the controller 15. And, the remaining time display device 30 is provided on each side of each of the traffic lights 20 independently.

On the other hand, in the case of the general range traffic light 20, as shown in the drawing, the traffic light 20 is composed of a stop light 22, a yellow light 24, a straight light 26, a left turn light 28.

Looking at the configuration of the remaining time display device is installed in each of the traffic lights independently with reference to Figure 2, the remaining time display device 30 is a stop light 22, yellow light 24 of the traffic light 20 When the straight light 26 and the left turn light 28 are turned on, the voltage detection unit 32 for detecting the voltage applied separately and the detection time of the voltage detected by the voltage detection unit 32 should be turned on. Recognize the time S, but the stop light 22 is "S1", the yellow light 24 is "S0", the straight light 26 is "S2", the left turn lamp 28 is "S3" voltage detection The microcomputer (P) for calculating the remaining lighting time by calculating the time of learning and recognizing the signal for each signal and learning the learned time (time to be turned on; S) and the learned time (lighted time: S '), and the micom (P). The memory device 34 which stores the time S to be turned on and the time S 'to be turned on, and provides the stored data to the microcomputer P, and the microcomputer P. The output control unit 36 which receives the calculated remaining lighting time and the type of signal output by the control panel) and controls the LED display panel, which will be described later, and counts blue and red according to the type of the signal under the control of the output control unit 36. The remaining time display device 30 may be configured as an LED display panel 38 capable of displaying a figure such as “O” and “X” when the arrow and the counter are not counted.

With reference to Figures 2 and 3 will be described for the step of performing the control in the following display device and the method of controlling the remaining lighting time of the traffic signal.

In the first step, the voltage detector 32 provided in the remaining time display device 30 installed independently of each traffic light 20 detects a voltage applied to each signal separately and transmits the voltage to the microcomputer P.

In the second step, the microcomputer P recognizes the detected voltage as the time S at which each signal should be turned on, but the stop light 22 is S1, the yellow light 24 is S0, and the straight light 26 is S2. The left turn lamp 28 recognizes S3 and checks whether the time S to be turned on for each signal is the initial value (0) or if there is a set time value. The time S is learned and stored in the storage device 34.

When the time S to be turned on for the signal whose voltage is detected is set by the third step and the second step, the microcomputer P continuously learns the turned on time S 'to be turned on. The lighting time S 'is subtracted and the value and type of the signal are sent to the output control unit 36, and the output control unit 36 displays the appropriate lighting time on the LED display board 38 in color and figure. Is displayed with.

In the fourth step, when the voltage detection of the signal is completed, the time S to be turned on is synchronized with the time S 'turned on, and then the time S' turned on is initialized (0).

According to the present invention acted as described above, the setting of the time S to be turned on does not depend on the controller of the traffic signal and the automatic control unit or the manual control unit or the remote site, and the power of each signal wired to each signal lamp 20. Detects the voltage applied to the line, learns the voltage detection time to set the lighting time, and the time (S) to be turned on by learning continuously is always the time (S ') that is finally turned on, Therefore, even if the signal period changes, the remaining lighting time of each signal can be displayed without controlling the traffic box control box or providing data.

According to an embodiment of the present invention, traffic signal cycles of a stop-going-left turn signal, a stop-direct / left simultaneous signal, and a stop-direct / left simultaneous signal after-going signal, which are typical signal cycles of a crossroad traffic signal, will be described below. It looks at with reference to Figures 4a to 4c.

Figure 4a is a flow chart showing a control method according to an embodiment of the present invention, Figure 4b is a flow chart showing a control method according to another embodiment of the present invention, Figure 4c is a control method according to another embodiment of the present invention It is a flow chart showing.

First, an embodiment of the present invention will be described with reference to FIG. 4A below as an example of a traffic signal having a stop-going-left turn signal, in which the stop-going-left turn signal is individually turned on as in the example. In this case, the algorithm for performing each signal is the same, and thus, the stop light will be mainly described.

Initially, when the remaining time display device is driven, the time (S) at which each signal should be turned on, that is, S1 (stop light), S2 (direct light), S3 (left turn light), S0 (yellow light), S0 '(yellow) Etc.), the time that S0 '' (yellow light) should be turned on and the time that each signal has been lit (S '), that is, S'1 (stop light), S'2 (direct light), S'3 (left turn light) ) Is the initial value of "on".

Assuming that the voltage of the stop light is detected from the initial value, the voltage of the first stop light is detected, but since the time to be turned on is the initial value (0) (step P10), it is again checked whether the voltage of the stop light is detected (P15). Step) As the voltage is detected, the time S1 to be turned on by the stop light is set in the initial learning stage, which is the next step (P16). S1 = S1 + time, that is, the preset time to turn on (S1). + Continuously repeats learning the unit time as the time to be turned on (S1) and initializes the accumulated unit time to the total time to be turned on (S1) until no voltage is detected. If the yellow light turns on 2 ~ 3 seconds before the stop light goes out (P17), the yellow light should be turned on in the same way as the learning method (S0 = S0 + time). The initial time S0 is learned by initial setting (step P18).

On the other hand, the initial setting step of the time (S1) when the stop light is to be turned on and the time when the yellow light is to be turned on (S0), the initial setting step of the time to turn on the straight light (S2) and the yellow light between the straight lights The same applies to the initial time setting of the time S0 'to be turned on, the time S3' to be left turned on and the time S0 'to be turned on between yellow lights turned to the left.

In the drawing, step P90, which is not described, is a step of erasing afterimages generated due to characteristics of the LED display panel.

When the signal cycle is repeated in the state where the initial time setting is completed and the voltage of the stop light is detected again, the time to be turned on is not “0”, and thus the remaining time is displayed (step P24 in step P10). The red light is displayed by subtracting the lighted time S'1 from the time S1 to be turned on (P24 step; in the case of straight and left turn lights), the value is greater than 99 seconds. In the case of stop light, the remaining time may not be displayed. In case of stop light, "X" is displayed in red (P22). In case of straight light, "O" is displayed in blue. In case of left turn light, blue "O" is displayed. A separate blue arrow figure is displayed along with the mark.

Therefore, assuming that the time S1 to be turned on is 200 seconds, the "X" indication is output on the LED display board until the remaining time reaches 100 seconds, and the count is output on the LED display board from 99 seconds.

On the other hand, the time at which the voltage of the signal is detected, that is, the lit time S'1, continuously accumulates the unit time at S'1 = S'1 + time (steps P22 and P24).

When the lighting is completed (step P30), the time S1 to be turned on is synchronized with the lighted time S'1 and the lighted time S'1 is initialized to "0" (step P32). Set the learned time as the time to be turned on (S1), and this applies equally to the straight and left turn light.

As another embodiment of the present invention, a traffic signal having a stop-going / left turn simultaneous signal will be described with reference to FIG. 4B as an example. In the drawings, the same reference numerals as in FIG. 4A denote like numerals to avoid duplication of description. Represented by

In the case of a traffic signal that provides a stop-going / left turn simultaneous signal, the algorithm for learning the lighting time of the stop light and the straight light is the same as the case where the stop-going-left turn signal described above is individually turned on. Since it is a simultaneous right and left simultaneous signal, it is not necessary to detect the voltage applied when the left turn light is turned on. The above configuration can be applied to a signal of a three-way or straight road or a crosswalk without a left line signal.

Hereinafter, referring to FIG. 4C below as an example of a traffic signal having a stop-direct / left simultaneous signal-to-direct signal as an example of the present invention, the algorithm for learning the lighting time of the stop light is stop- Same as when the straight-left turn signal is individually turned on, but simultaneously detects the voltage applied when the straight light turns on and the voltage applied when the left turn lights turn on, and the configuration thereof will be described in more detail below. Like reference numerals designate like reference numerals to avoid duplication of description.

Assuming that the voltages of the straight and the left turn light are detected at the initial value, the voltage of the first straight and the left turn light is detected, but the time to be turned on is the initial value (0) (step P100). Is detected (P150), and the voltage is detected, so that the time to turn on the straight and the left turn light is set in the initial learning stage, which is the next step, so that the time to be turned on (S2) (S3) is continuously maintained. Initially set the accumulated unit time (time) to the time to be totally lit (S2) (S3), but if the voltage of the left turn light is not detected (P190), only the lighting time of the straight light continues. Stored as a time (S2) to be accumulated and lit (step P195).

Then, if the yellow light is turned on 2-3 seconds before the turn-off of the turn signal and 2-3 seconds before the turn-off of the straight light (steps P170 and P175), the same method as the method for learning the time S to be turned on for each signal (S0 '' = S0 '' + time, S0 '= S0' + time) Initially learns the time (S0 '', S0 ') that the yellow light should be turned on (P180, P185).

When the signal cycle is repeated in the state of the initial setting is completed and the voltage of the straight and the left turn light is detected again, the time to be turned on is not "0" to display the remaining time (step P240 to P240), The remaining time is displayed by subtracting the lit time (S'3) of the left turn light from the time (S3) to turn on the left turn light (1) and displaying it with an arrow mark in blue (step P240). If it is more than 99 seconds (step P200), the remaining time may not be displayed, and a blue separate “O” mark and a separate arrow are displayed (P220).

On the other hand, the lighting time (S'2) (S'3) continuously accumulate the unit time as S'2 = S'2 + time, S'3 = S '3 + time (steps P220 and P240) .

When the left turn light is turned on (step P300), the time to be turned on (S3) is synchronized with the lighted time (S'3) and the lighted time (S'3) is initialized to "0" (step P320). ) Always set the last learned time as the time to be lit (S3).

Since the left turn light is turned off and only the straight light is turned on, the algorithm for calculating the remaining time by learning the lighting time of the straight light is similar to the case where the stop-go-right-left turn signal described above is individually turned on. The same, except that the initial setting step is omitted.

Therefore, according to the control method of the present invention as described above, the setting of the time S to be turned on is not performed by the controller and the automatic control unit or the manual control unit or the remote location of the traffic signal, but the wires are connected to the respective traffic lights 20. Detects the voltage applied to the power line of the signal, learns the voltage detection time to set the lighting time, and the time (S) to be turned on continuously by learning is always the time (S ') that is finally turned on, There is no need to replace or modify the control box of the traffic signal, it is simple to install, and it can be put to practical use with relatively little time and cost compared to the prior art.

Meanwhile, according to the above, the remaining time displayed on the LED display is a value obtained by subtracting the lighting time S 'from the time S to be turned on, and the time S to be turned on is the last time S turned on. ') If the lighting time of the traffic light is changed according to the increase or decrease of traffic volume or the set time zone, the lighting time of the actual traffic light does not match the remaining time displayed on the LED signboard. Although it can be ignored as one or two occurrences during the rush hour of an intersection with a lot of traffic, a configuration to compensate for the above defects in order to display a more perfect remaining time will be described with reference to FIGS. 4A to 4C. see.

First, let's look at the case where the signal lighting time is shorter than the lighting time of the last cycle. For example, the time S0 (S0 ') (S0' ') that the yellow light should be lit is learned by 3 seconds and is initially set. If the signal lighting time is 30 seconds shorter than the last signal lighting time, when the remaining time is 33 seconds on the LED display (actually 3 seconds before turning off) When the voltage of the yellow light is detected (step P40) (step P400), the remaining time (S-S ') of the signal light is 33 seconds and the time (S0) (S0') that the yellow light should be lit. (S0 ''), which is greater than 3 seconds, the signal lighting time is regarded as being shortened (P42 step) (P420 step) .The LED signboard stops counting and displays an arrow or "X" or "O" indication in red or blue. By doing so (step P22) (step P220), confusion of drivers and pedestrians is prevented.

On the other hand, if the remaining time is less than 3 seconds, it is assumed that the signal lighting time is unchanged and the remaining time is normally displayed (step P24) (step P240).

In the following case, the lighting time of the signal is longer, but as an example, if 100 seconds is longer, the lighting time (S ') increases as the learning is repeated, and eventually the lighting time (S') is longer than the time (S) to be turned on. When it is large (P50 step) (P500 step), the count is stopped and the lighting time is increased, i.e., 100 seconds by red or blue arrow or "X" or "O" indication (P22 step) (P220 step) until the signal is turned off. Avoid confusion while in the driver and pedestrians.

As described above, the control method that stops counting when the signal lighting time is shortened or extended is applied in the same way as stop light, straight light and left turn light. In the case of straight light, "O" is displayed in blue, and in the case of left turn light, "O" is displayed in blue with a separate arrow.

According to the above-described remaining time display device for lighting a traffic signal and a control device thereof, a microcomputer controlling the remaining time display device is mounted inside the remaining time display device, and detected from a power line of a signal wire that has been previously wired. By continuously learning the signal lighting time based on the voltage detection time and displaying the remaining lighting time of the traffic light, there is no need to replace or modify the control box of the existing traffic signal, it is simple to install, and it is relatively small compared to the prior art. In addition to the effect that can be put to practical use in time and cost, when the lighting time of the traffic light changes, it stops the counting without controlling the control box of the traffic signal, thereby preventing confusion of drivers and pedestrians.

Claims (6)

A remaining time display apparatus of lighting of a traffic light; A voltage detector 32 for separately detecting a voltage applied when the stop light 22, the yellow light 24, the straight light 26, and the left turn light 28 of the traffic light 20 are turned on; The detection time of the voltage detected by the voltage detector 32 is recognized as the time (S) to be turned on by learning, the stop light 22 is "S1", the yellow light 24 is "S0", straight light Reference numeral 26 denotes "S2" and the left turn lamp 28 "S3" to learn and recognize the voltage detection time for each signal, and calculate the remaining lighting time by calculating the time S to be turned on and the time S 'to be turned on. A microcomputer P for calculating; A storage device 34 for storing the time S to be turned on learned by the microcomputer P and the time S 'turned on and providing the stored data to the microcomputer P; An output control unit 36 which receives the calculated remaining lighting time and the type of the signal output by the microcomputer P and controls the LED display board to be described later; Residual time display device of the traffic signal, characterized in that the control of the output control unit 36 and can be counted in blue and red according to the type of the signal, it is composed of an LED signboard 38 capable of displaying the figure. A control method of a lighting time remaining display device of a traffic light; A first step of separately detecting a voltage applied to each signal and transmitting it to the microcomputer P; The detected voltage is recognized as a time (S) at which each signal should be turned on, but the stop light 22 is S1, the yellow light 24 is S0, the straight light 26 is S2, and the left turn light 28 is S3. Recognize that the time (S) of each signal to be turned on is the initial value (0), check whether there is a set time value, and if the initial value (0) to learn the time (S) that each signal should be turned on Setting a second step; When the time S to be turned on of the signal in which the voltage is detected by the second step is set, the microcomputer P continuously learns the turned on time S 'to turn on the time S to be turned on. One hour S 'is subtracted and the numerical value and signal type are sent to the output controller 36, and the remaining time is displayed on the LED display board 38 with the appropriate color and figure by the output controller 36. A third step of becoming; When the voltage detection of the signal is completed, the fourth step of initializing (0) the lit time S 'is performed after synchronizing the time S to be lit with the lit time S'. Control method of lighting remaining time display device of traffic signal. The method of claim 2; In the case of a traffic signal in which the period of lighting of the traffic signal is a period of the straight signal after the simultaneous simultaneous left / left signal after the stop signal; The first step detects the voltages of the straight and left turn lights simultaneously; In the second step, after initializing and learning the time to be turned on (S2) (S3) of the straight and the left turn lights, if the voltage of the left turn light is not detected, only the lighting time of the straight lights must be accumulated and turned on ( Initializing to S2); In the third step, the remaining time obtained by subtracting the lit time S'3 of the left turn light from the time S3 to be turned on first of the left turn light is displayed in blue with an arrow mark; In the fourth step, when the lighting of the left turn light is completed, the time S3 to be turned on is synchronized with the lighting time S'3 and the lighting time S'3 is initialized to "0"; After performing the fourth step, the third step is performed again, but the third step is a remaining time obtained by subtracting the lighting time (S'3) of the straight light from the time (S2) to be turned on in the straight line to blue. Display; After performing the third step, perform the fourth step again, wherein the fourth step is time to be turned on when the straight light is completed (S2) is synchronized with the lighted time (S'2) (S'2) is a control method of the lighting remaining time display device of the traffic signal, characterized in that to perform the step of initializing to "0" sequentially. The method of claim 2 or 3; In the third step, the lighting time S 'is subtracted from the time S to be lit, and when the remaining time exceeds 99, a red "X" mark or a blue "O" mark is displayed. Control method of the lighting remaining time display device of the traffic signal comprising the step of performing. The method of claim 2 or 3; In the second step, the lighting time of the yellow light which is turned on with the extinguishing of each signal is imminent is initially set to the time S0 (S0 ') (S0' ') to be lit by the yellow light which is lit between each signal light; When the voltage of yellow light is detected in the third step, when the remaining time (S1-S'1) of the signal light is larger than the time S0 (S0 ') (S0' ') to be lit by the yellow light, the count is displayed. And stopping the display and performing a red or blue figure display. The method of claim 2 or 3; If the time S'1 lit in the third step is greater than the time S1 to be lit, displaying the remaining time of lighting of the traffic signal, including stopping the count display and performing a red or blue figure display. Control method of the device.