KR100564207B1 - Traffic signal control system that use rain laying type vehicles perception sensor - Google Patents

Abstract

The present invention relates to a traffic signal control system using an embedded sensor.

At T- or + -shaped intersections where the traffic entering the secondary roads is very small compared to the traffic going straight on the main road, the vehicle entering the intersection in all directions except the straight vehicle on the main road (the straight or left turn waiting vehicle entering the stop line of the secondary road, The left turn vehicle of the main road is automatically detected by the non-contact non-embedded vehicle detection sensor, and the traffic signal can be automatically controlled by using the non-embedded vehicle detection sensor. When the vehicle detects a stop line waiting vehicle for access to a road, it changes to a signal in the direction of waiting for the vehicle, and the flow of a straight vehicle is stopped due to a traffic signal on the road, or it is stagnated by receiving a signal more than necessary. To improve the problem, for drivers passing through the main street, if the traffic light on the main road is red, It jinchulip remind of the fact that the vehicle is a road to prevent vehicles parking in advance at intersections.

Description

Traffic signal control system that use rain laying type vehicles perception sensor

1 is a block diagram showing a schematic configuration of the present invention.

Figure 2 is a block diagram showing the configuration of the central processing unit of the present invention.

Figure 3 is a table showing the functional state of the present invention sensitive control traffic signal.

Figure 4 is a table showing the definition of the flow and the appearance order and appearance combination definition in the intersection according to an embodiment of the present invention.

5 is a schematic diagram showing the mobile flow at the intersection of the present invention in the state of the dual ring;

Figure 6 is a schematic diagram showing a manifestation system that can be generated in a dual ring for the mobile flow at the intersection of the present invention.

7 is a schematic diagram showing a state of a national road according to an embodiment of the present invention.

8 is a schematic diagram showing the present state when there is no call signal from the vehicle sensor in the left direction and the negative direction at the intersection according to the embodiment of the present invention.

9 is a schematic diagram showing the present state when there is a call signal from the vehicle detectors of the first and second main roads in the intersection according to the embodiment of the present invention.

Figure 10 is a schematic diagram showing the present state when there is a call signal from the vehicle detectors of the third and fourth main road in the intersection according to an embodiment of the present invention.

Figure 11 is a graph showing the operating state of the left turn sensitive control in accordance with an embodiment of the present invention.

12 is a schematic diagram showing a manifestation state that is operated in combination according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

A: induction control traffic signal 1: central processing unit

2: contradiction detection unit 3: traffic light driving unit

6 central computer 13 signal control unit

14, 16: central processing unit 15: signal driver

17: detector interface device 23: modem

25: the flasher

The present invention relates to a traffic signal control system using a non-embedded vehicle detection sensor. Particularly, a traffic signal control system using a non-embedded vehicle detection sensor, except for a straight vehicle on a main road, at a T-shaped or + -shaped intersection having a very small amount of traffic entering and exiting a secondary road compared to a straight road traffic. Automatically detects the stop line waiting vehicle using the non-contact non-embedded vehicle detecting sensor for vehicles entering the intersection in all directions (forward or left turn waiting vehicles entering the stop line of the sub-road, and the left turn vehicle for the main road). It is possible to control the vehicle automatically, so that the straight signal of the main road is continuously turned on and operated in normal times, and it is a non-burying type that changes the signal to the direction in which the vehicle waits only when it detects a stop line waiting vehicle for access to the road. The present invention relates to a traffic signal control system using a vehicle detection sensor.

In general, most of Korea's national roads have a naturally occurring form and composition, and thus have various characteristics for each area.The characteristics of these roads have a characteristic of crackdowns that are cut off by traffic lights, but the distance between intersections is somewhat different. It is well known that it has a characteristic of continuous flow because of its long length.

In addition, most intersections of national roads are connected to small village roads, and these roads have very little traffic, but some national roads are in serious traffic problems due to the lack of proper traffic system due to large factories and new town development. Information collection and proper signal control become very important.

Currently, traffic lights at T-shaped or + -shaped intersections with low traffic on and off roads from the national highway are operated by a fixed signal cycle during the day, and are operated by a traffic signal with the function of blinking yellow at night. It is commercially available.

However, this causes problems such as stopping the flow of the straight vehicle by the left turn signal at the intersection or congestion by receiving a signal more than necessary during the day. There is an inherent risk of an accident.

Therefore, at the T-shaped or + -shaped intersection where the traffic entering the secondary road is very small compared to the straight traffic on the main road, the straight or left turn waiting vehicle entering the stop line of the secondary road except the straight vehicle on the main road, the left turning vehicle on the main road, etc. It is necessary to automatically detect the traffic entering the intersection in all directions using the non-contact non-embedded vehicle detection sensor and to control the traffic signal automatically.

Patent application No. 10-1997-003570 dated February 5, 1997 (Method for controlling the response of a traffic signal controller using an image detector) was proposed, which was applied to the inside of an image detector connected to a camera for photographing traffic conditions on the road. A video card for converting the image signal input from the camera into a video signal, a video compression transmission device for compressing and transmitting the video signal, a storage device for storing the compressed video signal and various traffic information, and processing the video signal to convert it into traffic information. And a first central processing unit for transmitting the converted signal,

The traffic signal controller connected to the image detector may include a second central processing apparatus and a traffic control center configured to perform inductive control based on the traffic signal transmitted from the first central processing apparatus while executing the original traffic signal control program. Modem for communicating information or control programs between the second central processing units, an input / output unit for receiving a manual operation command or performing an output command of the second central processing unit, and power according to the output of the input / output unit Register driver for applying current or current), contradiction detector for checking whether each signal combination is in error, flasher for continuously flashing one signal in case of failure of traffic signal controller, and registered terminal block for direct output of traffic lights Composed of

Therefore, when the straight traffic light for one direction of the intersection is turned on, the signal of one car passing through the front clogging detection unit is processed by the video signal and calculated at a speed according to a predetermined calculation method. If the above process is repeated until five cars are passed and the average passage speed is 10 km or less, it is judged that a blockage has occurred and the straight ahead after the minimum lighting time of the pedestrian passing traffic signal to be considered while the straight traffic light is turned on. Turn off the traffic lights early and end the control.

If it is not less than 10Km or the minimum lighting time of the pedestrian passing traffic light has not elapsed during the above process, the process returns to the process for calculating the speed, and if the lighting time of the straight traffic light has elapsed while performing the anti-blocking response control method. When the light is turned off, the controller waits until the straight traffic light turns on again to perform the response control again from the beginning.

If the left turn signal is turned on in one direction of the intersection, it is determined whether there is a vehicle in the left turn detection unit, and if there is a vehicle, the road non-occupancy time of the left turn vehicle is calculated. As it was judged that there was no problem, the left turn signal lamp was turned off early and the left turn response control was completed.

However, according to the sensitivity control method of the traffic signal controller using the conventional image detector as described above, it is necessary to recognize the driving speed again while recognizing the presence and the number of vehicles in progress with a plurality of cameras. When this occurred, there was a problem that the proper response is not possible.

Therefore, the present invention was devised to solve the above problems, and the traffic volume of the road to the secondary road is very small compared to the straight traffic of the main road, at the T-shaped or + -shaped intersection, except all vehicles except the straight road to the main road The vehicle entering the intersection in the direction (direct or left turn waiting vehicle entering the stop line of the road, the left turn vehicle on the main road) is automatically detected by the non-embedded vehicle detection sensor, and the traffic signal is automatically detected. The non-embedded vehicle detection system is designed to change the signal to the direction in which the vehicle waits only when the vehicle detects the stop line waiting for entrance and exit. It is an object of the present invention to provide a traffic signal control system using a sensor.

In addition, another object of the present invention is to use a non-contact vehicle detection sensor, there is no road damage, to simplify the maintenance in the event of a failure to automatically detect a stable stop line entry vehicle.

Traffic signal control system using a non-embedded vehicle detection sensor according to the present invention for achieving the above object is a system for the use of a non-buried non-embedded vehicle detection sensor to go straight and left turn vehicles and left turn vehicle on the main road It is possible to establish a more rational and advanced vehicle detection system and signal control system by minimizing delay and waiting on national roads and preventing accidents by flexibly performing traffic control according to the detection and detection.

Inductively controlled traffic signals are installed at intersections or crossings to control traffic lights. The central processing unit (CPU) has intelligence by using a microprocessor in a enclosure equipped with waterproof facilities,                         

An interface unit for processing an input signal from a non-embedded vehicle sensor;

Conflit Monitor, which can monitor abnormal operation of the response control traffic signal,

Solid state relay unit (SSU) for driving traffic light,

It consists of manual control switches that can be operated by traffic police.

The inductively controlled traffic signal transmits the state information of the inductively controlled traffic signal and the traffic information collected by the inductively controlled traffic signal from the vehicle detector to the central computer by using a dedicated or exchange line, and the central computer is optimized for the site traffic conditions. When the signal control variables and control patterns are determined and remotely commanded, they can be operated by them, or immediate response control can be performed by vehicle sensor information in the field.

The sensitive control traffic signal stores programs and data in a programmable read only memory (ROM) and a random access memory (RAM), while the control program is easy to modify when upgrading various functions (Up-Grade). Design by module, use erasable and programmable storage (EEPROM).

In addition, random access memory (RAM), which stores various data such as TOD (time of day) and plan (PLAN), includes a backup battery circuit therein in case of power failure.

The signal control function of the response control traffic signal includes a response control method in which a signal period for each direction is changed based on information collected from a vehicle sensor installed at an intersection, and a time control method controlled by signal time data set by pre-investigated traffic volume information. In addition, all data and clocks stored in the local controller body have a function such as a reference time interlocking control method capable of controlling signals at adjacent intersections and lights.

The signal control and related data can be easily changed, and each of the signal controller and the signal driver have separate central processing units so as to divide and process functions, and the data transmission between them uses a serial communication method. It is done.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

1 is a schematic view showing the overall configuration of the present invention,

By using the non-contact non-embedded vehicle sensor, it detects straight and left turn vehicles and left turn vehicles on the main road and flexibly controls traffic accordingly, minimizing delay and waiting on national roads and preventing accidents. To build a more rational and advanced vehicle detection system and signal control system,

Inductively controlled traffic signal (A) is installed at the intersection or crossing road to control the traffic light, the central processing unit (CPU) (1) and intelligent using the microprocessor in the enclosure with waterproof facilities, and

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Conflit Monitor (2) for monitoring abnormal operation of the sensitive control traffic signal (A),

Solid state relay unit (SSU) (3) for driving the traffic light,

It consists of manual control switches 4 which can be operated by the traffic police officer.

The sensitive control traffic signal A uses the dedicated or switched circuit 5 to transmit the state information of the sensitive control traffic signal A and the traffic information collected from the vehicle sensor by the sensitive control traffic signal to the central computer 6. Send it,

The central computer 6 determines the optimal signal control variable and control pattern suitable for the on-site traffic conditions and remotely instructs the sensitive control traffic signal A to operate by this, or the sensitive control traffic signal A Enables immediate response control based on vehicle sensor information on site.

The inductively controlled traffic signal (A) stores a program and data in a programmable read only memory (ROM) 7 and a first random access memory RAM1 8, while the control program has various functions. In order to easily modify during the upgrade (Up-Grade) to store in the read-only memory (7) for each module (module),

Erasable and programmable storage (EEPROM) 9 is used.

In addition, the second random access memory (RAM2) 10 that stores various data such as a time of day (TOD) and a plan (PLAN) includes a backup battery circuit 11 therein in preparation for volatility during power failure.

The signal control function of the sensitive control traffic signal A includes a response control method in which a signal period for each direction is changed based on information collected from a vehicle detector 12 installed at an intersection, and signal time data set by pre-investigated traffic volume information. It is configured to have a function such as a reference time control method that can control signals of adjacent intersections and lanterns by the time control method controlled by the control system and all data and clocks stored in the local controller body.

The CPU 1 includes a timer that accurately counts time and a reliable real time clock that is not affected by temperature, humidity, vibration, and the like.

2 is a block diagram showing a more detailed configuration of the present invention,

The signal control unit 13 and the signal driver 15 forming the central processing unit 1 of the sensitive control traffic signal A and the signal control and related data of the sensitive control traffic signal A are easily changed. Each of them has a separate central processing unit (14) and (16) to share the function to process, and the data transmission between them to use a serial communication method.

The signal control unit 13 mainly comprises a detector interface device 17 for receiving information of a vehicle from the vehicle detectors 12 of infrared rays and microwaves,

A GPS satellite signal receiver 18 for receiving GPS satellite signals;

Pedestrian push button receiving unit 20 for recognizing the state that the pedestrian on the push button 19 to cross the crossing,

A railroad crossing interface unit 22 that receives a signal from the railroad crossing breaker 22 about whether a train passes through the railroad crossing;

A central processing unit 14 for performing such collected traffic situation information processing and traffic response control, communication with a central center, and connection to a main machine interface (MMI);

Under the control of the central processing unit 14, the state information and the collected traffic information are transmitted to the central computer 6 through a dedicated or exchange line, or the optimum determined by the central computer 6 to meet the site traffic conditions. The modem 23 is configured to remotely receive signal control variables and commands of the control pattern.

In addition, the signal driver 15 includes a central processing unit 16 which checks whether the signal lamp 24 is turned on and off while performing a double safety function,

Solid state relay unit (SSU) (3) for driving a traffic light 24 under the control of the central processing unit (16),

Under the control of the central processing unit 16, it consists of a pusher (25) for outputting a signal for a cycle of blinking to repeatedly turn on and off the signal lamp 24.

The main machine interface (MMI) included in the central processing unit 14 of the signal control unit 13 transmits data input from a key attached to the front surface or data input for modification to the central processing unit 14. The status of the operation is displayed on the liquid crystal display so that it can be seen from the outside.

The vehicle detector 12 is a vehicle detector of infrared rays and microwaves. When a vehicle is detected on a roadway or a left turn lane at an intersection, information about an on / off state is centrally processed by the signal controller 13 through the sensor interface device 17. It transmits to the device 14 to receive the command through the upper central computer 6 or to control the lighting or turning off of the signal light 24 by self-sensitive control.

The GPS satellite signal received through the GPS satellite signal receiver 18 extracts a real time clock signal related to a real time clock from many satellite signals transmitted from the satellites, and time information through a timer of the inductive control traffic signal A. It can be installed in the inductive control traffic signal (A) that supports the VME bus system to correct the standard time, as well as a high frequency receiver for receiving a signal, a digital signal processor for processing a signal, and processed signal data. It performs a function by the configuration including the microcomputers for outputting the location information by using.

The central processing unit 16 of the signal driving unit 15 detects an abnormality by an input from a conflict monitor 2 which detects an inconsistent lighting state of the signal lamp 24 and an abnormal state of the input voltage. In the judged state, the output signal is received from the central processing unit 14 of the signal control unit 13 to drive the traffic light driver 3 to control the present state.

The crasher 25 of the signal driver 15 causes an inconsistency in the lit state of the signal lamp 24 or an inconsistency in the input voltage due to an output signal transmitted from the central processing unit 14 of the signal controller 13. When a signal of a state recognized by the contradiction detecting unit 2 is transmitted through the central processing unit 16, the red signal flashes under control and at the same time outputs an output for driving an alarm device around the traffic light. .

In the traffic signal control system using the non-embedded vehicle detecting sensor of the present invention configured as described above, when power is first supplied to the sensitive control traffic signal A, the traffic signal control system is configured for the time specified in the start-up table. Flashing yellow or red traffic light

Traffic sensor A of the present invention (A) is to set the time for operation or to correct the error,

The time used for the inductively controlled traffic signal (A) is based on the power frequency (60 Hz), and in some cases, may be used based on the clock frequency of the crystal oscillator. Ensures that one cycle error does not exceed 100 msec.

The response control traffic signal A can set a time in the range as shown in the table of FIG. 3 according to each manifestation function and can be set to a value sufficiently necessary in the range of minimum and maximum time.

If there is some error in the set time, it is possible to correct the error time in the field by remote control or using a portable computer.

In the central computer 6 connected via the modem 23, the administrator remotely transmits a control command to correct an error in time.

Alternatively, the portable computer is connected to the central processing unit 14 of the signal processor 13 through the main machine interface MMI to transmit a control command so as to correct an error in time.

The sensitive control traffic signal A of the present invention is controlled by the central computer 6, which is a remote host system.

In other words, the host system determines whether to perform all control parameters and various functions, and performs the following functions as a mode for controlling the sensitive control traffic signal A through the communication medium.

1) Display management function: Display management function by control command from central computer 6, which is the upper system.

2) points. OFF and Blink: A function to turn on, turn off, or flash the signal lamp 24 by a command from the central computer 6, which is an upper system.

However, even when the traffic light 24 is turned off or blinks, communication with the central computer 6, which is the upper system, is normally performed, and information about the state of the traffic light 24 can be provided to the upper system.

3) Responsive control traffic signal reset (reset): There must be a function to reset the response control traffic signal (A) by the command of the upper system, the response control traffic signal (A) is operated from the initialization process. .

4) Phase hold: It is a function that is performed under special circumstances such as VIP path control, fire, etc. to hold the green signal at the time specified by the command of the upper system. In this state, the phase hold function is When released, the sensitive control traffic signal A must be held and then proceed in the order of normal signal presentation from the phase.

5) Remote reset: If flashing is selected by the contradiction detector (2), there is a problem in operation and remote reset by the upper control system is possible.

6) Date / Time Information Function: It is possible to update the clock in the local AMS by the command of the upper system to a specific date and time.

7) Dimming control function: It is possible to adjust the brightness level of traffic light more than 2 levels by command of higher system.

8) Induction control function: In case that there is allowance of induction control from the upper system, it is possible to perform the appropriate induction control mode for each traffic situation.

The inductively controlled traffic signal A of the present invention controls the control parameters specified in the table of TOD (time of day) and DOW (day of week) and whether the various functions are performed (TBC: time-based coordination control).

1) TOD control plan: Establish a signal control plan according to traffic conditions for each time zone to perform control.

2) Induction control: The appropriate induction control mode should be executed for each traffic situation only when it is allowed during induction control by TOD function.

3) Dimming control function: When the signal lamp 24 is turned on or flashing by the TOD function, the level of brightness can be adjusted in two or more levels.

4) points. Turn off and blink function: The function of turning on, turning off or flashing the traffic light 24 is enabled by the TOD function.

5) Consideration of offset synchronization time in TBC control: When entering into TBC control, there is a function to compensate the offset synchronization time due to the difference between the entry time into TBC mode and the start time of the selected TOD program. Have it.

When the sensitive control traffic signal A of the present invention is no longer able to be normally controlled due to a fatal system abnormality or is required during the late night time, the yellow traffic light of all access paths is controlled.

1) When a fatal abnormal condition occurs in the system CPU, signal driver, etc., the yellow traffic light should blink.

2) When the contradiction caused by the contradiction detector is detected, the yellow traffic light blinks.

3) In case of receiving command from upper system, yellow light should blink.

4) By the TOD function, all traffic lights will flash yellow at night if necessary during the late night hours.

The sensitive control traffic signal A of the present invention enables real time control at an independent intersection.

That is, when the communication with the central computer 6 is interrupted at the congested intersection or when the intersection is not related to the traffic flow of the adjacent intersection, the algorithm and built-in signal control parameters of the period and the manifestation rate are real-time. It generates itself so that traffic lights operate while ignoring interlocking with adjacent intersections.

The sensitive control traffic signal A of the present invention enables the sensitive control by a program built in the self.

1) Left turn response control method

If the traffic volume of the left turn and the secondary road is large, it is possible to maximize the use of the green signal time of the main road and the second road by terminating or omitting the unnecessary left turn signal early, and to go straight by the residual vehicle for the left turn. Minimize interference with traffic on vehicles.

2) Looking at the inductive control method recommended by the conventional NEMA standard, in order to use the clearing time of the main road as efficiently as possible, the vehicle detector is installed only on the roadway, so that the green light assigned to the roadway is omitted or terminated early. Use the anti-response control function to make it possible, or adjust the clearing time in each direction based on the traffic information collected by the vehicle detectors installed on the main road and the roadway. Allows the use of a full inductive control function that allows control.

The inductively controlled traffic signal A of the present invention should be capable of manual control by an operation unit or a button for a traffic policeman by a manual operation button of a traffic police officer, and can be operated by a switch of a manual control unit of a main controller.

1) After changing the manual / auto switch to the manual position, operate the switch so that each display time can be progressed.

2) After changing the manual / auto switch to the manual position, the red or yellow traffic light can be flickered by the manual flashing switch.

3) After changing the manual / auto switch to the manual position, operate the on / off switch to turn off all traffic lights so that the main controller operates normally.

4) In the case of a dual ring, the present body of the first ring (ring-1) and the second ring (ring-2) are simultaneously made.

Induction control traffic signal (A) of the present invention should have its own countermeasures when the system is abnormal.

That is, when a system abnormality occurs during the control mode operation, as a countermeasure, wirelessly report relevant information to the upper system at the time of abnormality occurrence, and prepare a countermeasure of several steps according to the criticality of the abnormality occurrence module.

1) In case of normal control or point control, check the sensor for abnormality, disconnection of signal lamp, or model error.

2) During constant cycle control or flashing, check for abnormalities in the read only memory (ROM) and random access memory (RAM) or the central processing unit of the signal driver.

3) During flashing control, check whether there is an abnormality in the central processing unit, signal lamp driver, or contradiction detector of the signal driver.

4) When control stops, check whether AC power input is interrupted.

Induction control traffic signal (A) of the present invention is to perform the present system in combination with the present order to operate the system according to the current situation.

The present order is based on the dual-ring recommended by NEMA, but applies to the single-ring concept in the case of a multi-directional intersection where it is difficult to apply the dual ring.

The basic manifestation can be divided into four types depending on when the end of the left turn begins. If the east-west and north-south directions consist of different manifestations, the movement is not crossed the starting manifestation and the barrier in the dual ring. The combination of Ryu gives a total of 16 present order.

Once the present order is determined, the present association for this present order can be automatically determined. In case of dual ring, timers are separately managed for each ring, so in case of inductive control, it is possible to operate while changing the present combination automatically according to the traffic flow situation without specifying the present combination.

Note, however, that if the next manifestation crosses the barrier, the barrier must be crossed only when both rings terminate.

In case of non-inductive control and operation by single ring, present combination code should be designated separately. Under central control and TBC control, control can be made while variably selecting one manifestation combination of manifestation combination codes.

There are two ways to operate the selected present combinations: the case of inductive control and the case of not.

The definition of the movement flow and the present order and the combination of the movements at the intersection are as shown in FIG. 4, and the sinusoidal movement flow (①) on the first road, the straight movement flow (②) on the third road, and the fourth road. Straight moving flow (③), straight moving flow (④) on the second road, straight rotating flow (⑤) on the third road, straight moving flow (⑥) on the first road, It can be defined as a clockwise rotational movement (⑦) and a clockwise rotational movement (⑧) on the fourth road.

In addition, when the flow at the intersection is expressed by the state of the dual ring, as shown in FIGS. 4 and 5, the sin-turn movement (①) on the first road and the left-turn movement (⑤) on the third road are shown. , Straight moving flow on the third road (②) and straight moving flow on the first road (⑥), sin-turn moving flow on the fourth road (⑧) and left turning moving flow on the second road (⑦), It can be expressed as a straight moving flow (④) on the second road and a straight moving flow (③) on the fourth road.

Therefore, as shown in FIG. 6 with reference to FIG. 4, the present system that can be generated in the dual ring for the mobile flow at the intersection is shown in FIG. Left turn movements on the first road and left turn movements on the first road (b), straight flow on the first road and straight movements on the third road (c), straight and left turn flows on the third road (d ), Straight and sinusoidal movements on the fourth road (e), left turn movements on the fourth road and left turn movements on the second road (f), straight movements on the second road and the fourth road It can be expressed as a straight moving flow in (g), a straight and left turn moving flow (h) on the second road.

According to an embodiment of the present invention, the presenting of the variable signal is a system applied to a T-shaped or + -shaped intersection with a large traffic deviation between the main road and the secondary road, and is usually operated as a main signal of the main road while driving the vehicle signal or the main road of the secondary road. When the left turn of the road vehicle is detected, after waiting for a predetermined time to express the main signal to communicate the vehicle is as follows.

That is, at the intersection of the national road having the general first road, the main road of the third road and the second road, and the secondary road of the fourth road as shown in FIG. 7, the first road, the left turn of the third road, and the second road When there is no call signal according to the detection of the vehicle from the vehicle detector 12 of the negative direction detector on the fourth road, as shown in FIG. 8, such as the straight movement on the first road and the straight movement on the third road, as shown in FIG. 8. It runs straight in all directions. Here, the first, second, third, and fourth roads are provided with first, second, third, and fourth vehicle detectors for detecting vehicles of each road.

If there is a call signal in the first and third vehicle detectors 12 in this state, as shown in FIG. 9, the linear movement on the first road, the linear movement on the third road, and the sinus turn on the first road are shown. The manifestations of movement and straight movements, straight movements and slewing movements on the third road, slewing movements on the first road and left turning movements on the third road may occur.

When the second and fourth vehicle detectors 12 have a call signal, as shown in FIG. 10, the linear movement on the first road, the linear movement on the third road, the linear movement on the first road, and the first signal are shown. 3 Representation may occur due to the straight movement on the road, the sin-turn movement and the straight movement on the second road, the left turn movement and the straight movement on the fourth road.

In the case of large traffic changes on the left turn and side roads, the early termination and omission of unnecessary left turn signals maximizes the use of green time on the main road and side roads, and the left turn vehicle does not disturb the traffic of the straight vehicles.

Since there is a call signal according to the detection of the vehicle from the vehicle detector 12, when the signal is changed to the signal manifestation to communicate the vehicle in the corresponding direction, the left turn signal may be shortened or lengthened depending on the existence of the vehicle. This allows the signal to be operated by the dual ring.

That is, as shown in FIG. 11, when the vehicle is basically operated at the minimum green time, and the vehicle continues to exist, the signal is extended by extending the unit time by the maximum green time to increase the signal efficiency.

Therefore, as shown in FIG. 12, a call signal generated by the presence of a vehicle is generated in the vehicle detector 12 and the vehicle detector 12 on the third road and replaced by a left turn display. The left turn signal of the third road may be more mixed than the left turn signal of the third road so that only the left turn signal of the first road may be extended in the terminated state.

As described above, according to the traffic signal control system using the non-embedded vehicle detection sensor of the present invention, at the T-shaped or + -shaped intersection with a very small amount of traffic entering and going to the secondary road compared to the straight traffic of the main road, the road goes straight to the main road. Automatically detects the stop line waiting vehicle by using the non-contact non-embedded vehicle detection sensor for vehicles entering the intersection in all directions except for the vehicle (forward or left turn waiting vehicle entering the stop line of the road, and the left turn vehicle for the main road). By allowing traffic signals to be controlled automatically through normal operation, the straight signal of the main road is continuously turned on and operated, and the signal is changed to the direction of the vehicle waiting direction only when the vehicle detects a stop line waiting for access. The traffic signal of the road stops or the traffic signal is no longer needed. If and improve problems such as body, the traffic lights led to drivers to pass the led red to be sure to ventilate the fact that jinchulip vehicles in bankruptcy has the effect of preventing the garage at the intersection in advance.

Claims (4)

Control the internal operation by the central processing unit using a microprocessor in the enclosure equipped with waterproof facilities, Abnormal operation of the response control traffic signal (A) is monitored by the contradiction detection unit, Under the control of the central processing unit to drive a traffic light in the traffic light driver, When the manual control switch is operated by the traffic police officer, manual control is possible. The sensitive control traffic signal (A) transmits the state information and the traffic information collected from the vehicle detector to the central computer by using a dedicated or exchange line, The central computer determines the optimal signal control variables and control patterns suitable for the on-site traffic conditions and remotely instructs the inductive control traffic signal A to operate by the remote control or the inductive control traffic signal A in the field. Enable immediate response control based on vehicle sensor information, The central processing unit stores programs and data in a programmable read only memory (ROM) and a first random access memory (RAM1), while the control program is easily modified by modules when upgrading various functions. The information is stored in an erasable and programmable memory device (EEPROM) while the memory device is stored in the read-only memory device. The second random access memory RAM2, which is connected to the central processing unit and stores various data such as a time of day (TOD) and a plan (PLAN), is configured to include a backup battery circuit therein in case of power failure. Traffic signal control system using a non-embedded vehicle detection sensor. The method of claim 1, While the central processing unit is configured as a signal control unit and a signal driver, each having a separate central processing unit to transmit data to each other using a serial communication method, The signal control unit is mainly a sensor interface device for receiving information of the vehicle from the vehicle detectors of the infrared and microwave, A GPS satellite signal receiver for receiving a GPS satellite signal; A pedestrian push button receiver for recognizing a state in which a pedestrian turns on a push button to cross a crossing; A railroad crossing interface unit that receives a signal from the railroad crossing breaker 22 about whether the train passes through the railroad crossing, A central processing unit for performing the collected traffic situation information processing and traffic response control, communication with a central center, and connection to a main machine interface (MMI); Under the control of the central processing unit, the state information and the collected traffic information are transmitted to the central computer through a dedicated or exchange line, or the command of the optimal signal control variables and control patterns determined according to the site traffic conditions from the central computer is transmitted. Include modems receiving remotely, The signal drive unit performs a double safety function and checks the lighting and turning off of the signal lamp, and Solid state relay unit (SSU) for driving a traffic light under the control of the central processing unit, Traffic signal control system using a non-embedded vehicle sensor, characterized in that it comprises a pusher for outputting a signal for a cycle of blinking to repeatedly turn on and off the traffic light under the control of the central processing unit. delete delete

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