KR101115736B1 - Traffic signal control device which uses photovoltaic power generation - Google Patents

Abstract

Provided is a wireless traffic signal control apparatus using solar power that selectively receives traffic signals transmitted from a traffic signal controller using solar power and selectively drives traffic signals. The wireless traffic signal control apparatus using solar power is provided with at least two signal lights that are turned on / off by input of an AC lamp signal, and wirelessly converts an AC lamp signal for selectively driving at least two signal lamps installed at different positions. A wireless traffic signal controller converting the signal into a wireless signal and transmitting the registered signal wirelessly; It converts the energy of sunlight into electrical energy and is operated by the voltage charged in the battery, and includes a solar power radio signal lamp that receives the registered signal transmitted wirelessly from the traffic control signal and controls the lighting of the corresponding traffic light. have.

Description

TRAFFIC SIGNAL CONTROL DEVICE WHICH USES PHOTOVOLTAIC POWER GENERATION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic signal control apparatus. More particularly, the present invention relates to a traffic signal controller by receiving a traffic signal transmitted wirelessly from a traffic signal controller using photovoltaic power generation power. The present invention relates to a wireless traffic signal control apparatus using solar power.

Typically, the traffic signal control device is composed of one or more traffic lights and a traffic signal controller for controlling the driving of the traffic lights. The traffic light of the general traffic signal control device is being replaced by a light emitting diode (Light Emitting Diode) which has the advantage of providing high visibility to the driver and reducing power consumption.

Most of the traffic signal control devices using the above LED as a traffic light drive the LED traffic light by a commercial AC power supply (200VAC) due to compatibility with the existing traffic signal control device using an incandescent lamp with a color filter reflector. It is configured to. The traffic signal control device of such an LED traffic light is described in detail in Patent Registration No. 10-0524112, "Traffic Signal Control Device" (hereinafter referred to as "Patent Document").

However, the conventional traffic signal control device disclosed in the patent document is configured to transmit a 220VAC registered signal output from the traffic signal controller to a signal lamp via a cable in order to drive the LED signal lamp. There were a lot of problems. In other words, the traffic light system was paralyzed when power failures were driven by AC voltage transmitted from power plants such as KEPCO, and it was not environmentally friendly by using the power of power plants that generate carbon dioxide (CO ₂ ). In addition, the cable was connected between the traffic signal controller and the traffic light to transmit the 220VAC AC light signal output from the traffic signal controller as a traffic light.

It is therefore an object of the present invention to provide a traffic signal control device for controlling the lighting (on / off) of the traffic lights installed on the road by using the solar power generated as environmentally friendly energy.

Another object of the present invention is to provide a traffic signal control device for controlling the flashing lights of traffic lights with solar-generated power in response to the registered signals transmitted wirelessly from the traffic signal controller.

The present invention for achieving the above object is very usefully applied to a traffic signal control device having a traffic LED signal having at least two traffic lights that are turned on / off by the input of the AC registered signal, The traffic signal control apparatus includes a wireless traffic signal controller for converting an AC registered signal for selectively driving at least two traffic lights installed at different positions into a wireless signal to wirelessly transmit the registered signal; It converts the energy of sunlight into electric energy and is operated by the voltage charged in the battery, and receives the registered signal transmitted wirelessly from the traffic control signal and consists of a solar power radio signal that controls the lights of the corresponding traffic lights. It is done.

The solar power radio signal light is a traffic signal light having at least two traffic lights, a solar battery panel (solar battery panel) for converting the energy of sunlight into electrical energy and outputs a voltage / current corresponding thereto, the power generation output from the solar cell The solar power wireless signal lamp which is operated by a voltage output from a battery charged by a voltage / current which is turned on and controls a signal lamp corresponding to a registered signal transmitted wirelessly from the wireless traffic signal controller by the voltage of the battery. Characterized in that it consists of a controller.

The solar power radio signal lamp includes a registered state detection unit for detecting an abnormal state of a red light as a current flowing through a red light (Red: R) constituting the traffic light, and the wireless traffic light controller responds to the abnormal state detection. It is preferable to operate to stop the manifestation of the traffic lights and to output a registered signal flashing and driving the traffic lights.

The solar power radio signal lamp controller is a battery charging circuit for charging the battery by stabilizing the voltage output from the solar cell, and is operated by the voltage output from the battery and receives the registered signal transmitted from the wireless traffic signal controller wirelessly The traffic light control circuit is configured to control a flashing light of the corresponding traffic light among the traffic lights.

In the above configuration, the traffic light includes a green light (G), a red light (R), a yellow light (Y), and a turn light (arrow: A). The lamp is turned on / off by the input / blocking of the AC registered signals AC_G, AC_R, AC-Y and AC-A.

The traffic light control circuit may include: a battery monitor and an alarm unit configured to monitor whether power (charging voltage) from the battery is normal and output an alarm signal when the signal is below a reference value; An inverter for converting the DC voltage output from the battery into an AC voltage by a control signal and outputting the AC voltage; An AC zero crossing detection circuit for detecting a zero potential of the AC voltage output from the inverter and outputting a zero potential detection signal; A wireless traffic signal transmitter and receiver for transmitting and receiving data to and from the wireless traffic signal controller; A control unit (main control unit) for outputting a registration signal output from the wireless traffic signal transmission and reception unit as a registration control signal in synchronization with the zero potential detection signal; It is connected between the inverter and the traffic lights such as traffic lights, and the luminaire drive unit for outputting and driving the AC etc. signal to the corresponding traffic lights of the traffic lights in response to the registration control signal output from the control unit. It features.

The traffic light control circuit detects an electric current flowing through the red light of the traffic light and registers an abnormality detection unit for detecting whether a red light is broken (abnormal state), and detects the brightness around the traffic light of the traffic light so as to detect the brightness of the traffic light. And a dimming detection < Desc / Clms Page number 5 > control circuit for adjusting (), wherein the control unit is configured to transmit a registered abnormality detection signal output from the registered abnormality detection unit to a wireless traffic signal controller.

The wireless traffic signal controller may be configured to operate to wirelessly transmit a registration control signal for driving all traffic lights to the solar power radio signal in response to transmission of a registration error detection signal from the traffic light control circuit. Do.

As described above, the present invention charges a battery installed in a signal lamp holder installed in a suspension or exponential form at an intersection by electric power generated by a solar cell, and is charged in the battery by a registration control signal wirelessly transmitted from a wireless traffic signal controller. By driving the traffic lights installed in the traffic light holder with voltage, power consumption of the power plant can be reduced, and carbon dioxide can be reduced. In addition, by driving the lamp of the traffic signal by the registration control signal transmitted wirelessly from the wireless traffic signal controller it is possible to simplify the construction when installing the traffic light at the intersection.

1 is a plan view of the intersection application of the traffic signal control apparatus using solar power according to an embodiment of the present invention.
2 is a block diagram of the wireless traffic signal controller shown in FIG. 1.
3 is a schematic view of the solar power radio signal lamp shown in FIG.
Figure 4 is a block diagram of the solar radio signal lamp controller shown in FIG.
5 is an exemplary view of the traffic light control circuit shown in FIG. 4;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be noted that the embodiments of the present invention described below are intended to sufficiently convey the spirit of the present invention to those skilled in the art.

1 is a plan view of an intersection 10 to which a traffic signal control apparatus using solar power according to an embodiment of the present invention is applied. Referring to FIG. 1, each of the lanes of the intersection 10 is provided with solar power radio signals 30a to 30d operated by solar-generated electric power, and one side of the intersection 10 is the solar power radio signal lamps 30a to 30. 30d) and a wireless traffic signal controller (hereinafter referred to as "WTSC") 20 for transmitting and receiving registered signal data to drive traffic signals of solar power radio signal lamps 30a to 30d installed in each lane. It is installed. Although not shown in FIG. 1, a crosswalk for displaying a pedestrian crossing signal is provided at a cross section of each lane.

In addition, each of the solar power radio signal lights 30a to 30d illustrated in FIG. 1 have a predetermined identification code set in advance to receive only a data frame including the corresponding identification code, and to transmit its own unique identification. Send the code in the header of the data frame. In addition, the WTSC 20 is a header of data for transmitting a unique identification code uniquely set for each of the solar power radio signals 30a to 30d in order to control traffic signals of the solar power signal lights 30a to 30d installed in the corresponding lane. Include in the transmission.

The WTSC 20 shown in FIG. 1 supplies an alternating current signal to a general traffic light to turn on and off lights such as green light (G), red light (R), yellow light (Y), and turn signal (A). An AC lamp signal converter for wirelessly outputting a registration control signal to the traffic light controller for controlling is further provided. This will be described below with reference to FIG. 2.

The WTSC 20 shown in FIG. 1 converts an upper rack 21, a lower rack 22, an option rack 23, and an AC registered signal into a wireless data signal to transmit and receive wirelessly. An AC registered signal converter 24 is provided. In the above configuration, the upper rack 21, the lower rack 22, and the option rack 23 are included in the conventional traffic light controller 25, and receive traffic information from the traffic information center and install a plurality of traffic lights at the intersection. Outputs the AC lamps AC_G, AC_R, AC-Y and AC-A which drive the traffic lights (lamps). AC_G is a green light AC signal, AC_R is a red light AC signal, AC-Y is a yellow light AC signal, and AC-A is a turn signal AC signal. In this case, the AC registered signal is different depending on the vehicle driving road of the intersection, but in the case of a normal four lane includes a total of 48 AC registered signals including a crosswalk.

The AC lamp signal converter 24 converts the AC lamp signal output from the traffic light controller 25 into data and wirelessly transmits it to the solar power radio signal lamps 30a to 30d installed in each lane shown in FIG. Receives data transmitted wirelessly from the radio signal lamps 30a to 30d and transmits the data to the traffic light controller 25.

The WTSC 20 configured as described above converts different AC registered signals AC_G, AC_R, AC-Y, and AC-A into wireless data in each of the solar power radio signal lamps 30a to 30d, and then converts the corresponding solar power radio signal lamps into radio data. It can be seen that the registration signals are individually transmitted and received at 30a to 30d.

3 is a schematic diagram of the solar power radio signal lamp 30i (where i denotes a, b, c, and d, and satisfies the condition of a ≠ b ≠ c ≠ d) shown in FIG. Referring to FIG. 3, the solar power radio signal lamp 30i is provided with a traffic light 32 on an upper side of the signal lamp holder 31, and a solar cell 33 to efficiently collect sunlight on the upper part of the signal lamp holder. Is installed.

The solar cell 33 converts the energy of sunlight into electrical energy so as to provide a battery (battery: capacitor) provided inside the Solar Powered Wireless Traffic Signal Lamp Controller (hereinafter referred to as "SPTSC") 35. ).

The SPTSC 35 is input to the battery charging circuit 40 for charging the battery 42 by regulating the voltage output from the solar cell 33 to a constant voltage, as shown in FIG. The charging circuit 40 charges the battery 42 with the solar voltage. The discharge voltage of the battery 42, that is, the output voltage, is supplied to the traffic light control circuit 45 while being supplied to the operating power supply voltage of the battery charging circuit 40.

The traffic light control circuit 45 transmits and receives data related to the registered signal with the AC registered signal converter 24 of the WTSC 20 shown in FIG. 2 to transmit the green light G and the red light R of the traffic light 32. ), Yellow light (Y) and green light / red light / yellow light / turn light (AC_G, AC_R, AC-Y and AC-A) to light up the corresponding light To drive. In addition, the traffic light control circuit 45 detects the abnormality of the red light (R) by detecting the current flowing through the red light (R) of the traffic light 32, and wirelessly configured the WTSC ( 20). At this time, the WTSC 20 which inputs the red light R abnormal signal of the traffic light 32 is an AC lamp signal for driving the traffic light 32 with all the solar power radio light 30i shown in FIG. Outputs AC_G, AC_R, AC-Y and AC-A).

As illustrated in FIG. 5, the traffic light control circuit 45 which performs the above operation detects the level of the charging voltage of the battery 42 provided therein, and the detected output voltage level is equal to or less than the preset reference voltage level. And a battery monitor and an alarm unit 50 for outputting an alarm signal, and an inverter 51 for converting the discharge voltage output from the battery 42 into an AC signal 220VAC.

The zero potential detection unit 53 and the lamp driving unit 55 are connected to the output terminal of the inverter 51. The zero potential detection unit 53 detects a zero potential of 220 VAC and provides a signal to the control unit 54.

At this time, the control unit 54 receives the registered signal transmitted wirelessly from the WTSC 20 configured as shown in FIG. 2 through the wireless traffic signal transmitter / receiver 52, and its own identification code is included in the received data. Search for When the received data includes its own identification code, the control unit 54 analyzes the data output from the WTSC 20 and synchronizes with the zero potential detection signal output from the zero potential detection unit 53. A lamp control signal (LCS) corresponding to the analyzed data is input to the lamp driving unit 55.

The reason why the control unit 54 outputs the registration control signal LCS in synchronization with the zero potential detection signal detected by the zero potential detection unit 53 is that the signal lamp is changed at zero crossing of the AC signal when the signal is changed. This is because the change may not burden the circuit including the lamp driving unit 55.

The luminaire drive section 55 drives the driver C 55a, the driver R 55b, the driver Y 55c and the driver in accordance with the registration control signal LCS output from the control unit 54 in synchronization with the zero potential detection signal. A 55d is selectively driven and the AC light signal (AC) is supplied to the green light (G), red light (R), yellow light (Y) and turn signal (A) of the traffic light 32 connected to the output terminal thereof. -G, AC_R, AC_Y, AC_A) are output and the corresponding traffic light is turned off.

Therefore, the traffic light control circuit 45 according to the preferred embodiment of the present invention is operated by solar-generated power, and analyzes the data related to the registration control transmitted wirelessly from the WTSC 20 installed at the intersection of the traffic light 32. It can be seen that the traffic light is controlled.

Meanwhile, the registered abnormality detection unit 56 connected to the traffic light 32 detects a current flowing through the red light R, which is the most important traffic light in the traffic signal system, and detects whether the red light R is disconnected. red lamp fail). When the registered abnormality detection unit 56 detects an abnormality of a red light, it transmits a message indicating an abnormal state of the red light to the control unit 54.

When the red light abnormal state signal is output from the registered abnormality detecting unit 56, the control unit 54 in the traffic light control circuit 45 has an abnormality with the red light of the traffic light 32 through the wireless traffic signal transmitting unit 52. The abnormal state message is transmitted to the AC registered signal converter 24 of the WTSC 20.

The WTSC 20, which has received an abnormal state message such as a red light from the traffic light control circuit 45 in the SPTSC 35, flashes and drives the traffic light of the traffic light 32 to all the solar power radio light 30i installed at the intersection. The AC lamp control data is output so that all the traffic lights 32 are blinked and driven. At this time, if necessary, only the yellow light (Y) or the red light (R) of the traffic light 32 may be selected and flickered.

The dimming detection control unit 57 shown in FIG. 5 detects the ambient brightness of the traffic light 32 to detect the green light G, the red light R, the yellow light Y, and the like. Adjust the erection of the traffic light by adjusting the voltage input to the turn signal (A). The reason for this is that when the brightness of the traffic light used during the day after the sunset time is maintained as it is, the brightness of the traffic light is displayed too brightly, which may interfere with safe driving and greatly consume power of the battery 40. Dimming control of the dimming detection control unit 57 is preferably adjusted according to the dimming control signal output from the control unit 54.

As described above, the wireless traffic signal control apparatus using solar power according to the preferred embodiment of the present invention controls the flashing lights of traffic signals by using solar power generated by charging the battery, and the wireless traffic signal controller and solar power wireless. By controlling the traffic lights by wirelessly transmitting and receiving data related to the registration signal transmitted and received between the traffic lights, it is possible to simplify the construction while having compatibility with the existing traffic lights.

10: intersection, 20: wireless traffic signal controller,
21: upper rack, 22: lower rack,
23: option rack, 24: AC registered signal converter,
30a ~ 30d: solar power radio signal light, 31: traffic light holder,
32: traffic light, 33: solar cell,
35: solar power radio signal light controller, 40: battery charging circuit.
42: battery, 45: traffic light control circuit,
50: battery monitor and alarm, 51: inverter,
52: wireless traffic signal transmission and reception unit, 53: zero potential detection unit,
54: main controller, 55: luminaire,
56: red lamp failure detector, 57: dimming detection and controller.

Claims (5)

In the wireless traffic signal control device having a traffic signal light that is turned on / off in accordance with the input of the AC lamp signal having a level of 220VAC and at least two or more of the red signal light and a different color signal light,
Converts the AC registered signal that selectively drives at least two traffic lights installed in different positions into a wireless signal to transmit the registered signal wirelessly, and in response to the input of the abnormal signal light signal, the registered signal for driving the flashing light flashes. A wireless traffic signal controller for wireless transmission;
And an inverter for converting the voltage output from the battery charged by the voltage / current outputted from the solar cell into an alternating voltage, and when the potential of the converted alternating voltage is zero potential, to a registered signal wirelessly transmitted from the traffic control signal. Supplying the output voltage of the inverter to the corresponding traffic lights and lighting the lights, and detecting the current flowing through the red traffic lights among the traffic lights, and when the current is not detected, the solar power wireless traffic lights wirelessly transmitting the signal abnormal status signal to the wireless traffic signal controller. Wireless traffic signal control device using solar power, characterized in that comprising a controller.
The system of claim 1, wherein the solar power radio signal lamp controller comprises: a battery monitor and an alarm unit configured to monitor whether power from a battery is normal and to output an alarm signal when the power is below a reference value; A zero potential detection unit for detecting a zero potential of the AC voltage output from the inverter and outputting a zero potential detection signal; A wireless traffic signal transmission and reception unit for receiving a registered signal transmitted wirelessly from the wireless traffic signal controller and wirelessly transmitting the abnormal state signal of the traffic light to the wireless traffic signal controller; A control unit for outputting a registration control signal in synchronization with the zero potential detection signal, and transmitting the registration signal output from the wireless traffic signal transmission / reception unit to the wireless traffic signal controller through the wireless traffic signal transmission / reception unit; and; A wireless traffic signal control using solar power is connected between the inverter and the traffic signal lamp, and comprises a luminaire driving unit for supplying an AC voltage output from the inverter to a signal lamp corresponding to a registration control signal output from the control unit. Device.
The wireless power traffic light controller of claim 2, wherein the solar power wireless signal light controller includes a registered state detection unit configured to detect an abnormal state of a red light by detecting a current flowing through the red traffic light constituting the traffic light. A wireless traffic signal control device using solar power, characterized in that to stop the manifestation of traffic lights such as traffic lights in response to the sensing input and to wirelessly output the registered signals for driving the plurality of traffic lights.
The wireless traffic signal control device according to claim 2 or 3, wherein the solar power signal lamp controller comprises a battery charging circuit for charging the battery by stabilizing a voltage output from the solar cell. delete

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