KR101065437B1 - A signal generating device for traffic signal apparatus - Google Patents

Abstract

The present invention relates to a signal driving device of a traffic signal controller for controlling dimming of an emergency blinking light in accordance with a dimming control state of lighting normally in a traffic signal having a traffic light and a main control device. A signal lighting driver for lighting a signal lamp; A signal lighting controller which receives signal driving data from the main controller and controls the signal lighting driver according to the signal driving data, and receives a dimming control command from the main controller to control the dimming of the signal lighting driver; An emergency flashing driver for controlling a power different from the first power (hereinafter, referred to as a second power) to flash a traffic light; And an input / output bus having at least one connection pin terminal having a bus connection function for connecting the signal lighting control unit and the emergency flashing driving unit, wherein the signal lighting control unit has one connection pin terminal (hereinafter referred to as a first connection pin terminal). Transmits a signal regarding dimming control (hereinafter referred to as a second status signal) to the emergency flashing drive unit, and the emergency flashing drive unit is receiving the second status signal by the first connecting pin terminal when the traffic light flashes, or for a predetermined time. If it was receiving before, the structure which controls the flashing of a traffic light and flashes is provided.
By the signal driving device of the traffic signal as described above, even if the control device to operate normally when the dimming control module is stopped, it is possible to control the dimming even when the flashing of the traffic lights operating in an emergency.

Description

A signal generating device for traffic signal apparatus

The present invention relates to a signal driving device of a traffic signal for controlling the dimming of the flashing in an emergency in accordance with the dimming control state of the steady lighting in the traffic signal. In particular, the present invention relates to a signal driving device for controlling dimming of an emergency flashing of a traffic light in a traffic signal according to the "traffic signal controller standard standard" prescribed by the National Police Agency.

Traffic lights installed in intersections or pedestrian crossings have conventionally used incandescent lamps, but in recent years, the use of light emitting diode (LED) lamps, in which power consumption has been drastically reduced, is increasing. The National Police Agency is also encouraging the dissemination of LED lamp traffic signals by notifying minimum basic standards such as traffic lights with LED lamps.

The standard specification includes the construction of the traffic signal in the field, the construction of the traffic signal and the construction of the traffic signal in the process, and the communication protocol part of the central equipment related to the communication function. It includes specifications for the hardware of the traffic signal and the software for driving it, as well as the minimum communication specifications between the traffic signal and the central unit and between internal standalone devices.

The standard also specifies that optional features can be added to adjust the brightness of the traffic lamp to prevent glare and reduce power consumption in dark surroundings. When the traffic signal controller is set to the dimming control state, the brightness of the traffic light is reduced to a specified range, and when the dimming control is released, the brightness of the traffic light is reduced to before the dimming control. In the dimming control state, the brightness of the traffic light is maintained in the range of 50 to 70% of the brightness of the steady state, and the light output frequency is controlled to 60 Hz or more. The dimming control function may be selectively performed for each point by the operator, and the brightness of the day may be maintained as it is in an area where the reduction of the brightness of the traffic light is not desired, such as a high speed road or a bright downtown area.

Techniques for controlling the dimming of traffic lights according to the above standard specifications are Korean Patent No. 10-0528439, Korean Patent Publication No. 10-2011-0014846, Korean Patent Publication No. 10-2011-0019050, Korean Patent Registration No. 10-0961675 and many others are disclosed. The prior arts are technologies related to dimming control using day / night information, such as weather conditions in a surrounding area of a traffic light, the amount of a car being driven, and dimming control at day and night boundaries. That is, techniques mainly on how to control traffic light dimming.

However, the prior art only suggests a technique for controlling the dimming of the traffic light assuming only the state in which the traffic light operates normally, and does not present the dimming control for the flashing traffic light in an emergency.

In general, the control equipment for lighting a traffic light in normal state and the control equipment (or flasher, emergency flasher) for flashing a traffic light in an emergency are configured independently of each other. The reason for this is that it is natural to configure the normal operating equipment independently of the normal operating equipment since it must be designed to operate even in the event of a faulty emergency.

The dimming control module, which collects data from various sensors and controls dimming, is generally designed to be mounted on a control device that operates normally. Therefore, if the control equipment to operate in normal operation, the dimming control module also does not operate, there is a problem that can not control the dimming of traffic lights. If the dimming of the traffic light is not controlled in a situation where the traffic light does not operate normally, it may cause glare at the time of emergency flashing of the traffic light, which may cause a dangerous situation for the driver, and if the emergency flashing proceeds for a long time, it causes energy waste.

Even in this problem, the reason why the separate dimmer control module is not mounted on the flasher that operates the blinker in an emergency is that the manufacturing cost of the traffic signal is increased. Therefore, even without an additional dimming control module, a technology that can control the dimming of the traffic light even in the emergency signal lamp flasher is urgently needed.

Republic of Korea Patent Office Publication No. 10-0993636, Korea Patent Office Registered Patent Publication No. 10-0528439, Korean Patent Office Publication No. 10-2011-0014846, Korean Patent Office Publication No. 10-2011-0019050, Korea Patent Office Registered Patent Publication No. 10-0961675

An object of the present invention is to solve the problems described above, and to provide a signal driving device of a traffic signal for controlling the dimming of the emergency flashing in accordance with the dimming control state of the normal lighting in the traffic signal.

In particular, the object of the present invention is to record the dimming control state of the signal light control unit for controlling the lighting of the traffic light in the emergency flashing drive, and to control the dimming for the flashing of the traffic light according to the recorded dimming control state when the emergency flashing It is to provide a signal driving device of a traffic signal.

In addition, an object of the present invention is to provide a signal driving device of a traffic signal transmitting the dimming control state information by using a signal of varying the frequency of the connection pin terminal for transmitting the steady state of the traffic light control unit.

In order to achieve the above object, the present invention relates to a signal driving device of a traffic signal for controlling the dimming of the emergency flashing in accordance with the dimming control state of normal lighting in the traffic signal having a traffic light and the main control device, which is supplied to the traffic light A signal lighting driver for controlling power (hereinafter, referred to as first power) to turn on the signal lamp; A signal lighting controller which receives signal driving data from the main controller and controls the signal lighting driver according to the signal driving data, and receives a dimming control command from the main controller to control the dimming of the signal lighting driver; An emergency flashing driver for controlling the power different from the first power (hereinafter, referred to as a second power) to flash the traffic light; And an input / output bus having at least one connection pin terminal having a bus connection function for connecting the signal lighting control unit and the emergency flashing driving unit, wherein the signal lighting control unit has one connection pin terminal (hereinafter referred to as a first connection). Through the pin terminal) transmits a signal (hereinafter referred to as a second state signal) relating to the control of dimming control to the emergency flashing driving unit, and the emergency flashing driving unit is connected to the second state by the first connecting pin terminal when the traffic light flashes. If the signal is being received or is being received before a predetermined time, it is characterized in that the flashing by controlling the dimming of the traffic light.

In addition, the present invention is a signal driving device of a traffic signal, wherein the first connecting pin terminal is connected to the emergency flashing drive unit to the emergency flashing signal (hereinafter referred to as a first status signal) relating to the normal operation of the traffic light control unit; It is characterized in that the connection pin terminal to be transmitted to the drive unit.

In addition, the present invention is a signal driving device of the traffic signal, the first connecting pin terminal is characterized in that for transmitting the second state signal using a frequency higher than the frequency of the first state signal.

In addition, the present invention is a signal driving device of a traffic signal, characterized in that the frequency of the second state signal is 1.5 to 2.5 times the frequency of the first state signal.

In addition, the present invention in the signal driving device of the traffic signal, the emergency flashing drive unit flashes by controlling the dimming of the traffic light only when the previous signal is the second state signal, if the first or second state signal is not received It is characterized by.

As described above, according to the signal driving device of the traffic signal according to the present invention, it is possible to control the dimming even in the event of flashing of the traffic lights operating in an emergency, thereby obtaining an effect that enables safer driving of the traffic lights. In particular, it is possible to prevent glare caused by the flashing of the traffic light too bright after sunset, and to save energy by lowering the brightness of the flashing traffic light.

 In addition, according to the signal driving device of the traffic signal according to the present invention, by controlling the dimming in the emergency flashing driving unit by using the dimming control state of the traffic light control unit that operates in normal, the emergency light of the traffic lights without having an additional dimming control module An effect capable of controlling dimming is obtained.

In addition, according to the signal driving device of the traffic signal according to the present invention, by transmitting the dimming control state information by using the connection pin terminal for transmitting the normal state of the traffic light control unit operating in normal, the hardware of the control module of the traffic signal The effect of controlling the dimming of the emergency light flasher is obtained without making any changes.

1 is a block diagram of a configuration of a traffic signal including a signal driving device according to an embodiment of the present invention.
2 is a configuration diagram of hardware mounting of a traffic signal for implementing the present invention.
3 is a block diagram of a signal driving device according to an embodiment of the present invention.
4 is a table showing standards of connection pin terminals of an input / output bus according to an embodiment of the present invention.
FIG. 5 illustrates a traffic light signal connected to a connection pin of a traffic light on signal according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

In addition, in describing this invention, the same code | symbol is attached | subjected and the repeated description is abbreviate | omitted.

First, the configuration of a traffic signal for implementing the present invention will be described with reference to FIG.

As shown in Figure 1, the traffic signal for implementing the present invention is the main control unit (or signal main control unit, MCU, Main Control Unit) 100, the signal driving device (or traffic light driving unit, SCU, Signal Control Unit) 200, and a traffic light 400. Additionally, the guitar device 300 may be further included.

The main controller 100 and the signal driver 200 are separated and each adopts a separate central computing unit (CPU). The main control unit 100 performs functions such as traffic situation information processing such as detector data, control algorithm processing, communication with the control center central unit, and connection to an operator input device (MMI: Man Machine Interface) 140, and further function expansion is performed. Make it possible. The signal driving device 200 is dedicated to turning on and off the signal lamp according to the command of the main control device 100, and provides a fail-safe control function to perform basic signal output control when a failure of the main control device 100 occurs. Improve the stability of the system.

As shown in FIG. 2, the main controller 100, the signal driving device 200, and the other device unit 300 are mounted inside the traffic signal. In particular, the circuit board of the control devices is inserted into the interior of the traffic signal in the form of a slot.

The size of each device is 6U (unit) of the main control unit 100, the signal driving device 200 3U, and the other device unit 300 is 3U. And the terminal part of the terminal box (T / F) can be operated in a variety of internal arrangements within the range that satisfies the specifications of the entire enclosure, located at the bottom. The main controller 100, the signal driving device 200 and the other device 300 may be mounted in a different order depending on the installation conditions (such as the height of the seat) of the site. The location of internal components (main control device, signal driver, other device parts, etc.) can be appropriately positioned according to the ease of maintenance according to the installation conditions such as the height of the seat and the design form of the controller enclosure.

The main control unit 100 is a unit computing system that plays a pivotal role as a traffic signal, and at least one central processing unit board, one to eight loop detector boards and a DC power supply device, a communication modem and various option boards as one bus system if necessary. The connected device.

As shown in FIG. 1, the main controller 100 includes a CPU board 110, a modem 120, a detector board 130, an operator input device 140, an option board 150, a VME bus 160, and a power supply. Device 170 or the like.

The controller board (CPU board) 110 plays a pivotal role in preparing and operating a signal plan, managing a database, processing detection information, and communicating with external devices, and important data related to signal operation are memory backup functions. This ensures that data is always maintained even during a power outage.

Modem (modulator-demodulator) (120) is a frequency modulation and demodulation device is a card-type communication device that enables data communication in the traffic signal period with the control center central device.

The loop detection unit (LDU) 130 controls the vehicle's presence, speed, and other information to be installed in the traffic signal after installing the vehicle detection sensor by road laying, roadside or structure installation. Say the device. In addition, the interface with the controller board 110 should be able to be processed through the VME bus 160.

The man-machine interface (MMI) 140 is a device capable of inputting or modifying data necessary for a traffic signal by operating a keyboard installed at the front side, so that an operator can easily check data through a screen display device.

Option board (OPT) 150 refers to various VME bus compatible control boards that can be additionally mounted in addition to the detector board to perform not only control functions but also additional functions considering future expandability and compatibility. These option boards (or OPTs) must comply with the standard VME bus conventions and are produced in SLAVE mode if there is an independent process. Applicable to the option board 150 is a time signal receiving unit for setting an internal timer of a traffic signal by receiving a time signal generated from a radio, and a voice generator unit having a voice transmission function for the visually impaired. ), A pedestrian pushbutton input device having a button input function for pedestrian input.

The VERSA Module Eurocard Bus (VME) bus 160 is a 32-bit and 64-bit system bus standard for small computers, and is a bus standardized by IEC 821 and IEEE 1014 and implemented by a bus standard according to international standards. In the main controller 100, power is supplied between the controller board 110, the modem 120, the detector board 130, and the option board 150 through the VME bus 160, which is designed for industrial devices and proven to be stable. Signaling takes place.

The power supply device (or PWR) 170 receives an AC power supplied from the outside and converts it into a stable DC power supply for operating the device and supplies the same to the traffic signal.

Next, the signal control unit (SCU) 200 refers to a series of devices for receiving the signal progress command of the main controller 100 (MCU) to perform electrical output of a traffic light and to monitor the output result. Signal light control unit 210 for indicating the registration output (or output of the signal lamp lighting signal) by the progress, the signal light control unit 220 for controlling and monitoring the output for driving the signal light 400, performing flashing control in case of emergency The emergency flashing driving unit 230 is a device connected to one system bus 250.

The signal driving device 100 includes a feedback circuit (FEEDBACK, hereinafter referred to as a feedback signal) circuit for physically evaluating a power controller and a traffic light output result. In addition, the signal driving device 200 includes a series of input means (not shown) for accommodating a police officer's manual operation and a pedestrian input means, and the like, and an internal communication means (RS232C, etc.) for communication with the main controller 100. It includes.

Meanwhile, the other device unit 300 refers to a mounting space in which a control device having an independent computing system may be located inside the traffic signal. The independent control device that can be mounted in the other device unit 300 includes a wireless vehicle information collection device, a vehicle as well as a control device related to signal control functions such as a wireless input / output device, an independent image processing system, an alternative detector control system, and an independent real-time control system. Equipment used as field devices in recognition systems and other Intelligent Transportation Systems (ITS) can be mounted.

The devices mounted in the other device unit 300 may share the power signal and the communication line with the traffic signal, and can not be connected to other devices of the traffic signal by other physical methods other than the main control device 100 and the digital communication function, and the traffic signal function Should not cause disability.

Next, the traffic light 400 is composed of a light indicator 410 that displays red, green, yellow, arrows. The traffic light 400 includes a four-color equalizer with four indicator lights 410, a three-color equalizer with three, and the like.

The terminal box box (or T / F) of FIG. 2 refers to a facility space including a device for supplying power to a traffic signal and a terminal block for connecting a power line with a detector cable and a communication line. It connects devices and protects traffic signals from electrical noise and shock.

A cabinet is a protective cabinet whose purpose is to protect the equipment that makes up the traffic signal. The housing of the traffic signal should be designed in terms of ergonomics that can be installed on the seat to securely fix the traffic signal built-in devices and to block external shocks. The structure is largely composed of a cabinet, a support, a subrack, and a terminal facility.

Bus (BUS) refers to a circuit or a configuration method for configuring the electrical passage in the main board so that hardware devices can send and receive electrical signals, the main control unit 100 of the traffic signal is a standard VME BUS standard, the signal driving device ( 200) applies the general input / output bus (I / O BUS) standard which is constructed by the method specified in the standard specification.

Next, the configuration of the signal driving apparatus 200 according to an embodiment of the present invention will be described in more detail with reference to FIGS. 1 and 3.

As shown in FIG. 1 and FIG. 3, the signal driver 200 includes a signal light driver 210, a signal light controller 220, an emergency light driver 230, and an input / output bus 240.

The traffic light driver 210 controls the power (hereinafter, referred to as first power) supplied to the traffic light to turn on the traffic light.

The signal lighting driver (or LSU) 210 is a light switch unit (LSU: load switch unit) that directly controls the power supplied to the signal lamp, and generates a feedback signal for the control result of the signal lighting controller. Perform the function provided in 220. Signal light driver 210 should be available for 110V and 220V, and should not be affected by irregular changes in the driving environment.

In the power control circuit of the signal lamp driving unit 210, a dimming control function for adjusting the brightness of the lamp should be provided, and heat dissipation should be considered. In addition, for convenient maintenance, it is desirable to have a condition in which the faulty traffic light driver 210 may be partially (substrate) replaced during normal operation of the traffic signal.

In the actual dimming control, the dimming control by the on-off control is executed in the signal lighting control unit 220.

The signal lighting controller 220 receives the signal driving data from the main controller 100, controls the signal lighting driver 210 according to the signal driving data, and receives a dimming control command from the main controller 100. Control the dimming of the traffic light driver 210.

The signal lighting controller 220 includes a control circuit unit using a microprocessor, a ROM storing a program and initial data, a RAM for executing a program, a communication circuit for serial communication, a circuit for detecting a disconnection and contradiction, and a manual operation switch (Police). Panel switch) and an input circuit for accommodating a pedestrian input switch.

Based on the signal driving data of the main control device 100, the signal lamp driving unit 210 is directly controlled according to the time course to drive the lamp (lighting of the signal lamp), and when a contradiction of the signal lamp lighting condition occurs, a red or yellow signal lamp is generated. Flashes. By verifying the data necessary for driving traffic lights, the emergency flashing driver 230 is operated when an abnormal output or contradiction of the traffic signal occurs.

The signal lighting controller 220 controls the lighting state contradiction of the intersection signal light and abnormal output detection of the appearance light bulb, abnormal red light inspection, power failure, control of the emergency flashing driver 230 and the signal lighting driver 210, and a signal driving device ( 200) It has functions such as power management. Through the serial communication terminal receives the information on the present combination of the current progress from the main control unit 100 to express the manifestation, and performs the function of monitoring the output state of the bulb to determine the contradiction state.

On the other hand, when the dimming control command for adjusting the brightness (or dimming) of the back light comes from the main controller 100, the signal light controller 220 controls the light on and off the on-off signal to the signal light driver 210 to illuminate Perform the command.

Next, the emergency flashing driver 230 controls the electric power different from the first electric power (hereinafter, the second electric power) to flash the traffic light. That is, the signal light driver 210 controls the power different from the first power to turn on the signal lamp.

The emergency flashing driving unit 230 is a flasher unit (FLU) board, and includes a DC power supply abnormality, a signal lighting control unit 220 or more, a flashing instruction from the signal lighting control unit 220, and a flashing signal from the signal light driving unit 210. When there is a flashing traffic light by an independent power supply.

The normal control of the traffic light is referred to as " traffic light on ", and the control of the traffic light in emergency is referred to as " flashing light ".

Next, the input / output bus 250 is a bus for transmitting and receiving data between the components (or devices), that is, the signal lighting driver 210, the signal lighting controller 220, and the emergency flashing driver 230. (BUS). The bus connection standard for each device is defined in the input / output bus 250, and each connection pin terminal connects each element to the bus and performs data communication with other elements. An example of a bus connection standard for each device of the signal driver 200 (SCU) is shown in FIG. 4.

In FIG. 4, 30D RXD, 30B TXD, and 30Z GND are specifications for the main controller 100 interface, and 32D RXD1, 32B TXD1, and 32Z GND are for allocating front panel port pins of the enclosure.

The + 5V / GND (power supply) indicates the logic drive power supply, and the + 12V / GND (power supply) indicates the LSU's primary power / manual control unit bias power supply. Even if AC output is Off, LED operates as Logic. + 12V-O / GND (Power) is the primary power source for TRIAC driving of LSU.

D0 to D5 (3-STATE) are the luminaire driving signals (or the signal lamp lighting signals) of the LSU (signal light driver), where 1 is the registered output (light) ON and 0 is the registered output OFF. The signals are output as a lighting signal of the indicator 410 of each traffic light 400, as shown in FIG.

SEL0 to SEL7 are LSU register (signal) selection signals, and F0 to F5 (3-STATE) are LSU register output feedback signals.

SCU-RUN (OPEN-COLLECTOR, TOGGLE signal) (or the first connection pin terminal signal) is a signal for determining the SCU function is connected to the emergency flashing driver 230 to determine whether the signal light control unit 210 operates normally to be.

That is, the SCU-RUN (or the first connection pin terminal signal) is 50HZ or more in the normal state and 50HZ or less in the abnormal state. On the other hand, the first connection pin terminal signal is also a signal relating to whether or not the signal lighting control unit 210 is performing dimming control. That is, if it is 100 Hz or more, the dimming control is in a state, and if it is 100 Hz or less and 50 Hz or less, the dimming control is not performed, but the lighting of the signal lamp is normally controlled.

FLASH (OPEN-COLLECTOR, ACTIVE HIGH) is a signal for contradiction command, the normal state is 0, the contradiction state is -1, and the WRITE * (3-STATE, ACTIVE LOW) signal is a signal for designating LSU registered output / feedback input. (Linked with SEL signal).

SRESET (System reset Open-COLLECTOR, ACTIVE LOW) is the connection pin terminal to clear the LSU registered output, and CRESET (Conflict Reset, Open-COLLECTOR, ACTIVE LOW) indicates the status of the contradiction processing enable / disable (SCU output). CONF (Conflict, Open-COLLECTOR, ACTIVE LOW) relates to the signal contradiction state (LSU output), and it is a connection pin that compares the signal input state and the output state within the LSU by H / W and outputs it when there is a contradiction. .

POD (Power Of Disable, ACTIVE LOW) is an SCU output stop request (FLASH output) when FLASH is flashing, and disables the output of the SCU when entering flash control from FLASH.

Meanwhile, Z / C (Zero Cross Signal, OPEN-COLLECTOR, ACTIVE LOW) is an AC reference signal (ZERO CROSS) for determining whether the AC reference signal and the emergency flashing driver 230 operate normally in the signal lighting controller 220. use.

The Z / C connecting pin terminal (hereinafter referred to as a second connecting pin terminal) is a terminal for transmitting between the signal lighting control unit 220 and the emergency flashing driving unit 230 together with the first connecting pin terminal. Between the signal lighting control unit 220 and the emergency flashing driving unit 230 is a terminal for transmitting a signal only by the first and second connection pin terminal.

In addition, RXD, TXD, GND are for MCU Link, RXD1, TXD1, GND are for MMI Link (Option), and PRO / PGO / RO / YO / AO / GO (AC110 / 220 registered output) is LSU AC registered Output signal, ACF1 ~ ACF8 (AC110 / 220 registered output) is FLASH AC blink output signal, AC + / AC- / FG (AC110 / 220 AC input) is LSU / FLASH luminaire AC input signal. ACN + / ACN- (AC110 / 220 AC input) is a separate power AC input signal for driving FLASH.

DFM (Data Feedback Mode, ACTIVE LOW) is a selection signal of data feedback and lamp feedback. The DFM signal is set to 0 or 1 at CONT and the feedback is read. The LSU sets the feedback value to 0 or 1 according to the DFM. That is, when 0, data received in the feedback signal is set, and when 1, LAMP feedback is set in the feedback signa. If the data and data-feedback contents are different, CONT drives the flasher and treats it as a contradiction due to BUS ERROR.

SOFF (Signal Off, ACTIVE HIGH) relates to the LSU light output off, and FMODE (Flash active signal, ACTIVE LOW) refers to the flashing start and end signals of Flash.

Next, a method of performing dimming control when the traffic light blinks by the emergency flashing driver 230 will be described in more detail.

The signal lighting controller 220 transmits a signal (hereinafter referred to as a second status signal) relating to dimming control to the emergency flashing driver 230 through one connection pin terminal (or first connection pin terminal).

Therefore, the emergency flashing driver 230 checks whether the traffic light 400 is controlled by dimming through the second state signal. In this case, "no light control" means lighting (or blinking) at a normal lamp brightness, and "lighting control" means that the signal lamp is lit (or at a different lamp brightness than the normal lamp brightness). Flashing).

Preferably, the emergency flashing driver 230 records a signal of the first connecting pin terminal. In particular, the latest terminal signal is recorded for a predetermined time. For example, by setting a specific time such as 5 minutes, 10 minutes, 30 minutes, the latest terminal signal is recorded, and the previous signals are deleted. The first connection pin terminal signal is intended to eliminate this error because the frequency magnitude of the signal may change due to a temporary failure. In addition, a method such as storing an average value for a predetermined time may be applied.

An emergency situation in which the traffic light does not operate normally is when a DC power supply fault, a signal light control unit 220 or more, a flashing instruction from the signal light control unit 220, a flashing signal from the signal light drive unit 210, or the like are received. In this case, emergency flashing is required.

When an emergency flashing situation occurs, that is, when the traffic light flashes, the emergency flashing drive unit 230 receives the second status signal by the first connecting pin terminal, or if the second status signal is being received until a predetermined time ago. Flashes by controlling dimming. That is, when the signal currently being received is the second state signal or the recorded state confirms the second state signal and is confirmed as the second state signal, the traffic light blinks together with the dimming control.

Meanwhile, as described above, the first connection pin terminal of the input / output bus 250 is connected to the emergency flashing driving unit 230 so as to emergencyly output a signal (hereinafter referred to as a first status signal) regarding whether the signal lighting controller 220 is normally operated. It is a connection pin terminal to transmit to the flashing driver 230.

Accordingly, the first connection pin terminal may transmit both a first state signal indicating whether the signal lighting controller 220 is normally operated and a second state signal regarding whether dimming control is performed.

As described above, the input / output bus 250 transmits a signal only between the first and second connection pin terminals between the signal lighting controller 220 and the emergency flashing driver 230. In this case, the second connection pin terminal is connected to the signal lighting controller 220 to transmit a signal on whether the emergency flashing driver 230 is normally operated to the signal lighting controller 220. Therefore, by using the only connection pin terminal transmitted from the traffic light control unit 200 to the emergency point-specific driving unit 230, it is possible to send the first and second status signals.

Preferably, the first connecting pin terminal transmits the second state signal using a frequency higher than that of the first state signal. In the above example, the frequency of the first state signal is 50 Hz to 100 Hz, and the frequency of the second state signal is 100 Hz or more. In addition, when the 50Hz or less, it can be seen that the signal light control unit 220 is not in a normal operating state.

That is, if the emergency flashing driver 230 does not receive the first or second status signal, the emergency flashing driver 230 controls the flashing of the traffic light only when the previous signal is the second status signal. In this case, the immediately preceding signal refers to the recorded signal described above or a signal received for a predetermined time.

Preferably, the frequency of the second state signal is set from 1.5 times to 2.5 times the frequency of the first state signal. In other words, it is desirable to set a sufficient frequency difference to reduce the error.

As mentioned above, although the invention made by the present inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

100: main controller 110: CPU board
120: modem 130: detector board
140: operator input device 150: option board
160: VME bus
200: signal driving device 210: signal light driving unit
220: signal light control unit 230: emergency flashing drive unit
250: I / O bus 300: other device
400: traffic light 410: light, indicator light

Claims (6)

In a signal driving device of a traffic signal control device for controlling the dimming of the emergency flashing in accordance with the dimming control state of normal lighting in a traffic signal having a traffic light and a main control device,
A signal lighting driver to control the power supplied to the signal lamp (hereinafter, referred to as first power) to turn on the signal lamp;
A signal lighting controller which receives signal driving data from the main controller and controls the signal lighting driver according to the signal driving data, and receives a dimming control command from the main controller to control the dimming of the signal lighting driver;
An emergency flashing driver for controlling the power different from the first power (hereinafter, referred to as a second power) to flash the traffic light; And,
And an input / output bus having at least one connection pin terminal having a bus connection function for connecting the signal light control unit and the emergency flashing drive unit.
The signal lighting control unit transmits a signal (hereinafter referred to as a second status signal) relating to the control of dimming control through the one connecting pin terminal (hereinafter referred to as a first connecting pin terminal) to the emergency flashing driving unit,
The emergency flashing driving unit controls the dimming of the traffic light to blink when the second status signal is being received by the first connecting pin terminal or received before a predetermined time when the traffic light blinks. Signal driving device of signal.
The method of claim 1,
The first connecting pin terminal is a traffic signal terminal, which is connected to the emergency flashing driving unit and transmits a signal (hereinafter referred to as a first status signal) relating to the normal operation of the signal lighting control unit to the emergency flashing driving unit. Signal driving device.
The method of claim 2,
The input / output bus transmits a signal only between first and second connecting pin terminals between the signal lighting control unit and the emergency flashing driving unit.
The second connecting pin terminal is connected to the traffic light control unit signal driving device of the traffic signal, characterized in that for transmitting a signal relating to the normal operation of the emergency flashing drive unit to the traffic light control.
The method of claim 2,
The first connection pin terminal is a signal driving device of the traffic signal, characterized in that for transmitting the second state signal using a frequency higher than the frequency of the first state signal.
The method of claim 4, wherein
The frequency of the second state signal is a signal driving device of the traffic signal, characterized in that 1.5 to 2.5 times the frequency of the first state signal.
The method of claim 2,
If the emergency flashing drive unit does not receive the first or second state signal, the signal driving device of the traffic signal, characterized in that by controlling the flashing of the traffic light only if the previous signal is the second state signal.

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