KR102416627B1 - Coordinate Laser Measurement System Central Control Traffic Signal Automatic Controller - Google Patents

Abstract

This invention is a central control traffic light automatic controller installed in the center of the intersection, which uses a coordinate-type laser measurement method to determine the length of the queue of vehicles waiting for each lane at the intersection, and divides the queues in the left turn lane and the straight lane to determine the longest queue. It is a laser traffic signal control system that comprehensively controls the traffic flow at an intersection by giving a long traffic signal to the lane. It is about a coordinate-type laser measurement method central control traffic light automatic controller that includes a moving camera.

Description

Coordinate Laser Measurement System Central Control Traffic Signal Automatic Controller

This invention relates to a method for automatically controlling traffic lights, and there are lanes where vehicles wait for a long time at each intersection, and in some lanes, there are not many waiting vehicles. As a result, the lanes that are congested due to a large number of vehicles continue to get worse. The current traffic light system is a system in which traffic congestion is inevitable unless the police manually adjust the traffic lights of waiting vehicles and congested lanes. Although there is a patent that automatically adjusts the signal according to the number of vehicles waiting for a signal in the left-turning lane, it is a technology that has not yet been put to practical use, such as installing a sensor on the road floor and applying only to the left-turning lane.

Although there is a technology that uses the existing infrared sensor, the infrared sensor can be used at high speed and has high accuracy indoors.

To solve these problems, a laser sensor that can measure the distance is attached to each existing traffic light, and instead of counting the number of vehicles waiting at each intersection, the length of the road where vehicles are waiting for a long time is measured to determine the number of lanes with long waiting lines. It is a traffic light system that controls the flow of traffic by giving traffic signals longer than short lanes. It is an integrated traffic control system that can control the overall traffic flow in the city by sharing information about the congestion measured at each intersection with the automatic controller of laser traffic lights at other intersections.

Laser rangefinder 10-05855580 (May 25, 2006) It is about a laser rangefinder. It shoots a laser and measures the time it takes for the laser to be reflected back to the target. It is about a device that makes it possible.

The present invention was used to measure the queue of vehicles stopped on the road by using the principle of a laser rangefinder, which is a device that converts the time it takes to project a laser to a target and to return it back to a distance.

Real-time traffic control system and method (Patent Registration No. 10-0851564 (2008.08.12)) Considering the matrix size of waiting vehicles at intersections, etc., by varying the lighting time in real time, a real-time traffic control system and method that can significantly reduce traffic congestion The purpose of this invention is to facilitate communication at the intersection by installing a queue measuring terminal at each traffic light at an intersection to increase the lighting time of the green signal on a road with a long queue.

KR10-05855580 (2006.05.25) Laser rangefinder KR10-0851564 (2008.8.12) Real-time traffic control system and method

Existing traffic lights are a system that periodically changes signals at the same time at the same time regardless of whether some lanes are severely congested or the number of vehicles waiting at the intersection. If at an intersection, when there are only 2-3 vehicles waiting in one lane and many vehicles are waiting in the other lane, if the signals are changed at the same time interval, the congested lane will be more congested and there will be no vehicles in the other lane. There may be cases where only a signal is waiting without a signal. In order to solve this problem, it is necessary to have a device that can measure the number of vehicles waiting in each lane or the length of the queue, and a system that can control the signal repetition period flexibly based on the measured data is needed. will be.

If a sensor is attached to the road floor at regular distances to measure the length of the queue, it is too expensive and inefficient. The task is to develop a system that does not require a lot of initial installation cost by using the existing signal system.

In addition, the existing patent real-time traffic control system and method (Patent Registration No. 10-0851564 (Aug. 12, 2008)) requires a queue measuring device to be attached to all traffic lights, and communication errors may occur during the wired or wireless connection process. There is a disadvantage that only one lane can be checked because there is only an up-and-down motor rather than a method of measuring for straight, straight, and right-turning lanes respectively.

When emergency vehicles approach, it is necessary to find a way to control traffic lights and to warn and crack down on vehicles that aggravate congestion by tailgating at the intersection for smooth and rapid progress.

It is difficult to measure the number of vehicles waiting in each lane at an intersection. However, it is possible to measure the length of the queue in which the vehicle is waiting. If you measure the distance by a certain angle (eg 5 degrees, 10 degrees, 15 degrees 20 degrees...) using a laser rangefinder, the distance to the road floor when there is no vehicle and the distance to the vehicle when the vehicle is waiting The measured distance will be shorter than the distance to the road floor by about 1 meter or more depending on the type of vehicle. In this way, by measuring the length of the queue of vehicles waiting in each lane waiting at the intersection, the waiting status and queue of vehicles waiting in the entire lane of the intersection, including the left turn lane, the straight lane, and the right turn lane, can be measured. If all lanes are congested, the signal can be changed at the same waiting interval at once. This signaling system is centrally controlled, with both a traffic light and a control device installed at the center of the crossroad, and when one laser rangefinder is a waiting signal, it measures the queue of vehicles waiting in the left, straight, and right turn lanes. There is no need to install a traffic light, and the cost of installing a range finder at each traffic light can be reduced. In addition, since it acts as a median at the center of the intersection, illegality such as tail biting at intersections can be prevented.

By checking the period and size of the siren sound of emergency vehicles, it is possible to check from which direction the vehicle is approaching with the sound when approaching. There are other ways to notify.

I think the most effective method is to reinforce warnings and enforcement to drivers so that they do not proceed excessively when the traffic signal changes. Therefore, it can be solved by installing an enforcement camera and a speaker for warning broadcasting at the top of the central control unit.

1. By installing a centrally controlled traffic light with a laser range finder installed at the center of the intersection, the cost of installing each traffic light and range finder at an intersection can be reduced, and the effective traffic flow can be controlled.

2. On a road with only two lanes, there are many left-turning vehicles, so both lanes are often congested. In order to prevent all lanes from being congested because of one lane, because the length of vehicles waiting in all lanes of an intersection is measured. For this reason, the entire traffic flow can be controlled by adjusting only the signal in the congested lane for a little longer.

3. There is a traffic light and control device at the center of the crossroads, acting as a center line and separation zone at an intersection where no lines are drawn, reducing the risk of a collision when simultaneously signaling a left turn of an oncoming vehicle, and can prevent congestion with a warning light when tail biting.

4. In case of emergency vehicle sirens such as fire trucks and ambulances from a distance, when sirens and warning lights are approaching, the flashing signal is simultaneously emitted to control the speed.

5. By installing an automatic laser traffic light controller not only at one intersection but throughout the city, the overall traffic status can be grasped and traffic flow can be controlled throughout the city, reducing congestion.

1 is an external view of the coordinate-type laser measurement method central control traffic light automatic controller, (1) firing angle and firing direction control body inside (3) laser distance measuring sensor firing altitude control motor and (5) laser at the bottom Distance measuring sensor firing direction This is a device that sets the direction to be measured using a rotating motor and (2) measures the distance to the road floor with a laser distance sensor to determine the length of the vehicle queue waiting for a signal.
2 is an internal view of the coordinate-type laser measurement method central control traffic light automatic controller, (1) the launch angle and the launch direction control body, (2) the laser distance measuring sensor and (3) the laser distance measuring sensor, the launch height adjusting motor, ( 4) The noise sensor is built-in, and the (5) laser distance measuring sensor firing direction rotation motor rotates the (1) firing angle and firing direction control body to set the direction to be measured. (5) Below the laser range sensor firing direction rotation motor (7) firing angle and firing direction, there is an integrated controller for traffic lights and (8) solar rechargeable battery, and (6) solar panel and (9) traffic light on the outside of the crossroads It is installed in four directions.
3 is a view from above of the coordinate-type laser measurement method central control traffic light automatic controller.
4 is an overall view of a coordinate-type laser measurement method central control traffic light automatic controller, including (11) a support of the road and a (10) cylindrical column penetrating the center, and the traffic lights are located at the top and bottom in each direction of the intersection. It is installed in a place so that the traffic lights can be easily seen by discriminating the traffic lights according to the driver's eye level according to the type of vehicle such as a bus, truck, or passenger car.
5 is a diagram illustrating a method of measuring the length of a queue of vehicles waiting in each lane using a coordinate-type laser measurement method central control traffic light automatic controller. Laser measuring method installed at the center of the intersection The laser distance measuring method of the automatic controller of centrally controlled traffic lights is to measure the direction of A first if A, B, C, and D are each direction of the intersection. The first measurement point in A direction is expressed as (A1.1), and the first measurement point in the second direction is ( A2.1), the first measurement point of the third lane is entered as (A3.1) (crossroad direction, lane number, measurement point), and it is recognized as a fixed point on the coordinate plane. When the distance measured is shorter than the distance to the road floor, it is considered that there is a waiting vehicle, and the degree of traffic congestion figure out

The structure of the coordinate-type laser measurement method central control traffic light automatic controller consists of (12) intersection tail biting enforcement camera, (13) warning broadcasting speaker, (2) laser distance measuring sensor, and (3) laser distance measuring sensor launch altitude on the upper part of the body. (1) There is a body for adjusting the firing angle and firing direction with a control motor, (4) a noise sensor in 4 directions, and (5) a laser distance measuring sensor firing direction rotation motor on the inside of the lower part, (7) Launch altitude and launch direction, traffic light integrated controller, (8) solar rechargeable battery, (6) solar panel, and (9) traffic lights are installed on the outside in 4 directions at the crossroads and 5 directions at the 5th street. (9) One more traffic light is installed at the bottom in the same shape so that the traffic lights can be easily seen by differentiating the traffic lights according to the driver's eye level according to the type of vehicle such as a bus, truck, or passenger car. (10) A cylindrical column is connected through the center from the upper part to the lower part of the (11) support, and (11) the support is installed above and below the road to support the coordinate-type laser measurement method central control traffic light automatic controller.

The shapes shown in the representative diagrams and figures represent the most common crossroads, and the five-way and six-way intersections can be made in the form of pentagons and hexagons, respectively.

In this invention, a centrally controlled traffic light is installed at the center of the intersection where all drivers can visually check at each intersection, and the length of the trains stopped at each lane at each intersection is measured and measured by the laser distance measurement method at the time of a waiting signal. It is a system that automatically controls traffic lights by detecting the degree of congestion in each lane based on numerical values.

The principle of operation of this invention is that the coordinate-type laser measurement method at the center of the crossroads centrally controlled traffic light automatic controller (3)laser distance measurement sensor on the upper body of the automatic controller body turns left with a red stop signal at the crossroad (direction A) and turns left, straight line (2) Measure the length of the queue of vehicles waiting in each lane with a laser distance measuring sensor. When the opposite side (C direction) measured at the crossroads changes to a red stop signal, (5) laser distance measuring sensor firing direction rotating motor (2) setting the laser distance measuring sensor in C direction, and then waiting in each lane in C direction again. Measure the length of the vehicle train, and then measure all directions of the crossroad in the order of B and D directions. . For example, at this time, if the left turn 1 lane, straight line 2, 3 lane, and right turn 4 lane in the direction of crossroad A, and the number of vehicles in the left turn lane was measured to be 10 meters, the second lane 15 meters, the third lane 20 meters, and the fourth lane 3 meters, Enter 20 meters as the maximum value in the A direction as a three-lane long lane. In this way, by comparing the maximum values in the A, B, C, and D directions, the largest value and the smallest value are compared. If the difference is between 5 and 10 meters, the existing signal cycle is maintained and the difference is 10 meters It is a form of giving a long straight or left turn signal period in the direction with the largest value. The above method is given as an example, and the initial input value can be changed according to the size of the intersection or the shape of the lane, such as a left turn, a straight straight lane, or a straight straight, right turn simultaneous lane.

In the coordinate-type measurement method, each direction is divided into A, B, C, D... according to the number of intersections by the laser distance measuring sensor launch height control motor and laser distance measuring sensor installed at the center of the intersection. For example, the first measurement point in the A direction is represented by (A1.1), and the first measurement point in the A direction is expressed as (A1.1), using the value obtained by dividing the number of lanes in the A direction and the maximum length of the vehicle train to be measured by the number of times of measurement, respectively. The point is (A2.1), the third measurement point is (A3.1), and the measured values are (A1,2), (A2,2), ( A3,2), (A4,2).....(A1,5), (A2,5), (A3,5), (A4,5) After measuring all the lanes in A direction sequentially, Measure the B direction, C direction, and D direction according to the set coordinate method.

Since the laser rangefinder measures the distance by receiving the signal that the laser beam is reflected from the object, it is possible to obtain an approximate measurement value with the distance to the first inputted road floor at the same launch angle in the case of a lane without a vehicle. However, when there is a vehicle waiting for a signal, the measured distance is measured less than 1 meter than the measured value when there is no vehicle because the laser beam is reflected from the top surface of the vehicle before it hits the road floor. For example, if the measurement to the floor of the road is 4 meters when there is no vehicle, and 3 meters comes out when measured with the same launch altitude and launch angle, it is recognized that the vehicle is waiting up to that spot. It is possible to determine the length of the queue of vehicles waiting by measuring to a place where there is no vehicle, and to know the lane where the most vehicles are waiting at the crossroads. If there are no vehicles waiting at the crossroads at night or during quiet hours, all intersections can be changed to a lit signal. In places where there are many traffic accidents, the usual signal system can be maintained, but the signal change cycle can be shortened.

Each intersection is connected to another road, and if there is a traffic jam at one intersection, the other intersections will also stop sequentially. Because it is short, it will be able to solve problems such as congestion. In addition, instead of controlling one traffic light, traffic information can be shared with other traffic light systems to control the entire city traffic light.

The traffic light system varies depending on the 3rd or 4th street, and it is necessary to measure all the vehicle rows in all lanes because the traffic light system can be complicatedly changed depending on how many lanes there are in total, and whether the left turn lane is 1 lane or 1 or 2 lanes. There is a need for a traffic light control system that comprehensively judges by reflecting the measured values.

In addition, as an emergency vehicle such as an ambulance or fire engine approaches the intersection, there is a possibility of a collision with a vehicle entering the intersection according to the existing traffic signal. In some cases, it causes

In this case, the siren sound (the sound that gets louder as the regular 90-120db noise gets closer) is detected through the (4) noise sensor attached to the body in 4 directions (1) to adjust the firing degree and direction, and (5) the laser distance. It also has a function to control traffic lights to help emergency vehicles move smoothly and to protect precious lives and property, such as determining the direction of approach through the measuring sensor firing direction and rotating motors and giving a longer signal for the lane. Also, in case of traffic jam at the intersection, (1) firing accident level and firing direction control, (13) warning sound can be sent through the warning broadcasting speaker mounted on the upper part of the body, and (12) tracking and cracking down on tail-biting vehicles with the intersection tail-biting control camera. It is possible.

Traffic lights are supplied with power from the outside, but sometimes intersections are paralyzed due to power outages. At this time, the emergency power system is operated until power is restored using (8) solar rechargeable batteries charged through (6) solar panels during the daytime.

(1) Launch height and launch direction control body
(2) Laser distance measuring sensor
(3) Laser distance measuring sensor launch height control motor
(4) Noise detection sensor
(5) Laser distance measuring sensor firing direction rotation motor
(6) solar panel
(7) Launch altitude, launch direction, and integrated controller for traffic lights
(8) Solar rechargeable battery
(9) traffic lights
(10) Cylindrical column
(11) support
(12) Intersection tail biting enforcement camera
(13) Warning broadcast speaker

Claims (4)

In the coordinate-type laser measurement method central control traffic light automatic controller,
A launch height and launch direction control body installed in the center of the intersection, capable of measuring all lanes of the intersection while one laser distance measuring sensor rotates 360 degrees by a coordinate-type measurement method; a launch altitude, launch direction, and traffic light integrated controller that sequentially measures the set measurement coordinate points of the intersection according to the coordinate measurement method and compares the input values to control the upper and lower integrated traffic lights; Including a solar charge battery that supplies constant power by charging solar heat with a solar panel even when land electricity supply is interrupted A coordinate-type laser measurement method integrated into the central control traffic light automatic controller According to claim 1,
In the coordinate-type measurement method, each direction is divided into A, B, C, D... according to the number of intersections by the laser distance measuring sensor launch height control motor and laser distance measuring sensor installed at the center of the intersection. The first measurement point in A direction is represented by (A1.1), and the first measurement point is (A2.1), The first measurement point in the third lane is (A3.1), and the measured values are (A1,2), (A2,2), (A3,2), (A4, 2).....(A1,5), (A2,5), (A3,5), (A4,5) After measuring all the lanes in A direction in sequence, A coordinate-type laser measurement method that controls traffic lights by determining the lane with the longest length of waiting vehicles by measuring according to the coordinate method determined in the order of direction Central control Automatic traffic light controller delete delete

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