CN107578629B - Intelligent signal lamp control method based on urban main and secondary road intersection - Google Patents
Intelligent signal lamp control method based on urban main and secondary road intersection Download PDFInfo
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- CN107578629B CN107578629B CN201710740846.2A CN201710740846A CN107578629B CN 107578629 B CN107578629 B CN 107578629B CN 201710740846 A CN201710740846 A CN 201710740846A CN 107578629 B CN107578629 B CN 107578629B
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Abstract
The invention relates to an intelligent signal lamp control method based on an urban main road and secondary road intersection, wherein a main road inlet channel of the intersection can be turned left, straightly moved and turned right, and a geomagnetic induction coil A is arranged on the main road inlet channel of the intersection1Sensor B01Sensor B03And a sensor C, wherein a geomagnetic induction coil A is arranged at an exit way of a main road at the intersection2(ii) a Microprocessor M pair earth induction coil A1、A2Sensor B01Sensor B03And processing and analyzing the data acquired by the sensor C, and determining the green light extension time of the main road of the intersection according to the green light delay method. The invention fully utilizes signal timing to evacuate vehicles at the intersection, thereby saving time and reducing congestion.
Description
Technical Field
The invention relates to an intelligent signal lamp technology, in particular to an intelligent signal lamp control method based on urban main and secondary road intersections.
Background
Nowadays, with the development of the social and economic level, the quantity of private cars is increased year by year, the urbanization level is higher and higher, and the traffic jam of urban roads is more and more severe. In urban road intersections, the situation that signal timing cannot adapt to actual traffic demands is frequently stored, main road vehicles are queued for delay, congestion is serious, no vehicle passes through the urban road in green time, green time cannot be fully utilized, signal timing is wasted, and congestion cannot be evacuated. According to the system control method, the traffic signal control system is of the type having a fixed timing scheme control system and an adaptive control system, i.e., inductive control. The signal lamp parameters of the fixed timing scheme are preset according to historical data and do not change along with the traffic condition, and the induction control can monitor data according to the change of the traffic flow of the intersection, analyze and process the data and form a corresponding control scheme according to a certain control rule.
In the existing intelligent signal lamp technology, a mode of using a rotary probe to perform camera shooting and feed back traffic flow information to perform signal lamp control is mainly used, but the mode is not high in video recognition accuracy, is not as mature as a sensor in the technical aspect, and still has technical bottlenecks.
Disclosure of Invention
The invention aims to provide an intelligent signal lamp control method based on urban main and secondary road intersections, which is an intelligent signal lamp control method for realizing counting of vehicles at an entrance of a main road of an intersection based on a ground sensor, determining the number of the vehicles in line for going straight and turning left, determining the green time required to be prolonged by the main road according to a green time prolonging method and providing signals of the main and secondary main road intersections.
The technical scheme for realizing the purpose of the invention is as follows: an intelligent signal lamp control method based on urban main and secondary road intersections is suitable for urban main and secondary road intersections, a main road inlet channel of the intersection can be turned left, straightly moved and turned right, and a geomagnetic induction coil A is mounted on the main road inlet channel of the intersection1Sensor B01Sensor B03And a sensor C, wherein a geomagnetic induction coil A is arranged at an outlet channel of a main road of the intersection2(ii) a Geomagnetic induction coil A1The exit lane is arranged at the previous intersection and covers all lanes; sensor B01Arranged on a right-turn lane, a sensor B03The sensor C is a distance sensor and is arranged on the central separation belt; geomagnetic induction coil A2The exit lane is arranged at the current intersection and covers all lanes;
taking the phase of the main road signal of the intersection as a reference, starting when the phases are all red lights, and recording as a period until the next time when the phases are all red lights; dividing a period into three phases, wherein when the signal phases of the main trunk at the intersection are all red lights, the state is 1, namely the initial state; when the signal phase of the trunk road at the intersection is a straight green light, the state is 2; when the signal phase of the trunk road at the intersection is a left-turning green light, the state is 3;
in state 1, the geomagnetic induction coil A1Collecting the number a of vehicles entering a main road entrance way of an intersection1The sensor C acquires the vehicle queuing length C of a left-turn lane at a main road entrance of the intersection03；
In state 2, the geomagnetic induction coil A2Collecting the number a of vehicles entering an exit way of a main road2；
In state 3, the sensor B03Collecting the passing number b of vehicles passing through a left-turn lane of a main road entrance way at an intersection03；
In states 1, 2 and 3, the sensor B01Collecting the passing number b of right-turn lanes of a main road entrance way at an intersection01；
The geomagnetic induction coil A1Geomagnetic induction coil A2Sensor B01Sensor B03And the sensor C is completely reset and continuously acquires data when in the state 1, and transmits the data to the microprocessor M, and the microprocessor M intercepts instantaneous data according to the time sequence change point of the signal lamp and is used for calculating the number M of the vehicles in straight line queuing in one period2Left-turn queuing vehicle number m3And the number of vehicles staying in b0'；
Determining the threshold m according to a fuzzy logic method02And m03Respectively used for judging the number m of straight-line queuing vehicles2Left-turn queuing vehicle number m3Whether the green time of the corresponding state phase needs to be prolonged or not;
the intelligent traffic signal control method comprises the following steps:
step 1, starting at T morning in one day, and starting to record a at state 11，c03，b01The number of vehicles staying is b due to the initial state0Number m of vehicles in straight line in state 1 as 01＝a1+b0-b01-c03Sh, the time interval of the vehicle head is used as sh, and delay control is carried out according to a green light delay method;
step 2, trunk in State 2The number of vehicles passing through the primary and secondary main road intersections is a2+b01When the left turn queue length is c03I.e. number m of left-turn queued vehicles3＝c03The/sh is used for carrying out delay control according to a green light delay method;
step 3, before the state 3 is changed into the state 1, the number b of the vehicles staying at the main road entrance lane of the main and secondary urban road intersection is counted0'＝a1+b0-a2-b01-b03；
Step 4, mixing b0Is assigned to b0And re-entering the state 1, simultaneously resetting all the sensors and acquiring data again, and skipping to the step 1.
Compared with the prior art, the invention has the following remarkable advantages:
(1) compared with video detection, the sensor has high identification precision and relatively mature technology;
(2) the phase duration of the trunk road is prolonged according to the green light delay method, the timing time is fully utilized, the resource waste caused by the state that the vehicle is less or no vehicle passes in the green light state of the secondary trunk road is reduced, the time cost is saved, and the congestion is reduced;
(3) the sensor is reset before acquiring data each time, and then data is acquired, so that the acquisition error is small.
Drawings
FIG. 1 is a sensor distribution diagram of the present invention at an intersection of a primary and secondary main road in a city.
Fig. 2 is a schematic diagram of the control structure of the present invention.
FIG. 3 is a flow chart of an intelligent signal lamp control method based on urban main and secondary road intersections.
Detailed Description
With reference to fig. 1 and 3, the intelligent signal lamp control method based on the urban main and secondary road intersection is suitable for the urban main and secondary road intersection, a main road inlet channel of the intersection can be turned left, straightly and rightly, and a geomagnetic induction coil A is installed on the main road inlet channel of the intersection1Sensor B01Sensor B03And a sensor C, wherein the main road outlet channel of the intersection is provided with geomagnetismInduction coil A2(ii) a Geomagnetic induction coil A1The exit lane is arranged at the previous intersection and covers all lanes; sensor B01Arranged on a right-turn lane, a sensor B03The sensor C is a distance sensor and is arranged on the central separation belt; geomagnetic induction coil A2The exit lane is arranged at the current intersection and covers all lanes;
taking the phase of the main road signal of the intersection as a reference, starting when the phases are all red lights, and recording as a period until the next time when the phases are all red lights; dividing a period into three phases, wherein when the signal phases of the main trunk at the intersection are all red lights, the state is 1, namely the initial state; when the signal phase of the trunk road at the intersection is a straight green light, the state is 2; when the signal phase of the trunk road at the intersection is a left-turning green light, the state is 3;
in state 1, the geomagnetic induction coil A1Collecting the number a of vehicles entering a main road entrance way of an intersection1The sensor C acquires the vehicle queuing length C of a left-turn lane at a main road entrance of the intersection03；
In state 2, the geomagnetic induction coil A2Collecting the number a of vehicles entering an exit way of a main road2；
In state 3, the sensor B03Collecting the passing number b of vehicles passing through a left-turn lane of a main road entrance way at an intersection03；
In states 1, 2 and 3, the sensor B01Collecting the passing number b of right-turn lanes of a main road entrance way at an intersection01；
The geomagnetic induction coil A1Geomagnetic induction coil A2Sensor B01Sensor B03And the sensor C is completely reset and continuously acquires data when in the state 1, and transmits the data to the microprocessor M, and the microprocessor M intercepts instantaneous data according to the time sequence change point of the signal lamp and is used for calculating the number M of the vehicles in straight line queuing in one period2Left-turn queuing vehicle number m3And the number of vehicles staying in b0'；
According to the mouldFuzzy logic method for determining threshold m02And m03Respectively used for judging the number m of straight-line queuing vehicles2Left-turn queuing vehicle number m3Whether the green time of the corresponding state phase needs to be prolonged or not;
the green light time delay method comprises the following steps:
setting the maximum number of queued vehicles at a certain time of a required delay lane to be N in a peak period, setting the effective green time to be T when the queued vehicles pass through an intersection and setting the effective green time to be T when a secondary trunk road is in a green state, and when m is in a period2>m02Or m3>m03The phase of the green light is extended for a period of time
The phase left-turn green light has an extended time of
The maximum delay time is controlled within 10s, so that overlarge influence on intersection signal lamp timing is avoided;
based on the parameters and the green light delay method, the intelligent traffic signal control method comprises the following steps:
step 1, starting at T morning in one day, and starting to record a at state 11，c03，b01The number of vehicles staying is b due to the initial state0Number m of vehicles in straight line in state 1 as 01＝a1+b0-b01-c03Sh, the time interval of the vehicle head is used as sh, and delay control is carried out according to a green light delay method;
step 2, the number of vehicles passing through the intersection of the primary and secondary trunk roads in the state 2 is a2+b01When the left turn queue length is c03I.e. number m of left-turn queued vehicles3＝c03The/sh is used for carrying out delay control according to a green light delay method;
step 3, before the state 3 is changed into the state 1, the number b of the vehicles staying at the main road entrance lane of the main and secondary urban road intersection is counted0'＝a1+b0-a2-b01-b03；
Step 4B is mixing0Is assigned to b0And re-entering the state 1, simultaneously resetting all the sensors and acquiring data again, and skipping to the step 1.
Furthermore, the opening time T is set according to each situation and is 6:00-7: 00.
The present invention will be described in detail with reference to specific examples.
Examples
As shown in figure 1, the road junction is a main and secondary trunk road, the east-west road is a main trunk road, and a geomagnetic induction coil A is arranged at an east-west road1Sensor B01Sensor B03And a sensor C, wherein a geomagnetic induction coil A is arranged at an outlet channel of a main road of the intersection2。
Fig. 2 is a schematic diagram of a control structure of this embodiment, in which the sensor in fig. 1 transmits the acquired data to a microprocessor, and the microprocessor is connected to a signal control system to send a control signal.
With reference to fig. 3, an intelligent signal lamp control method based on urban main and secondary road intersections includes the following processes:
step 1, starting at 6:30 in the morning of a day, and starting to record a in the state 11，c03，b01The number of vehicles staying is b due to the initial state0Number m of vehicles in straight line in state 1 as 01＝a1+b0-b01-c03Sh, sh is the locomotive headway, and the delay control is carried out according to the green light delay method;
step 2, the number of vehicles passing through the intersection of the primary and secondary trunk roads in the state 2 is a2+b01When the left turn queue length is c03I.e. number m of left-turn queued vehicles03＝c03The/sh is used for carrying out delay control according to a green light delay method;
step 3, before the state 3 is changed into the state 1, the number b0' of the vehicles staying at the main road entrance lane of the urban main and secondary intersection is equal to a1+b0-a2-b01-b03；
Step 4, assigning b0' to b0Re-enter state 1, asAnd all sensors are reset and acquire data again, and the step 1 is skipped.
Claims (3)
1. An intelligent signal lamp control method based on urban main and secondary road intersections is characterized in that the control method is suitable for urban main and secondary road intersections, a main road inlet channel of the intersection can be turned left, straightly moved and turned right, and a geomagnetic induction coil A is mounted on the main road inlet channel of the intersection1Sensor B01Sensor B03And a sensor C, wherein a geomagnetic induction coil A is arranged at an outlet channel of a main road of the intersection2(ii) a Geomagnetic induction coil A1The exit lane is arranged at the previous intersection and covers all lanes; sensor B01Arranged on a right-turn lane, a sensor B03The sensor C is a distance sensor and is arranged on the central separation belt; geomagnetic induction coil A2The exit lane is arranged at the current intersection and covers all lanes;
taking the phase of the main road signal of the intersection as a reference, starting when the phases are all red lights, and recording as a period until the next time when the phases are all red lights; dividing a period into three phases, wherein when the signal phases of the main trunk at the intersection are all red lights, the state is 1, namely the initial state; when the signal phase of the trunk road at the intersection is a straight green light, the state is 2; when the signal phase of the trunk road at the intersection is a left-turning green light, the state is 3;
in state 1, the geomagnetic induction coil A1Collecting the number a of vehicles entering a main road entrance way of an intersection1The sensor C acquires the vehicle queuing length C of a left-turn lane at a main road entrance of the intersection03；
In state 2, the geomagnetic induction coil A2Collecting the number a of vehicles entering an exit way of a main road2；
In state 3, the sensor B03Collecting the passing number b of vehicles passing through a left-turn lane of a main road entrance way at an intersection03；
In states 1, 2 and 3, the sensor B01Collection crossRight-turn lane passing number b of main trunk entrance way of mouth01；
The geomagnetic induction coil A1Geomagnetic induction coil A2Sensor B01Sensor B03And the sensor C is completely reset and continuously acquires data when in the state 1, and transmits the data to the microprocessor M, and the microprocessor M intercepts instantaneous data according to the time sequence change point of the signal lamp and is used for calculating the number M of the vehicles in straight line queuing in one period2Left-turn queuing vehicle number m3And the number of vehicles staying in b0'；
Determining the threshold m according to a fuzzy logic method02And m03Respectively used for judging the number m of straight-line queuing vehicles2Left-turn queuing vehicle number m3Whether the green time of the corresponding state phase needs to be prolonged or not;
the intelligent traffic signal control method comprises the following steps:
step 1, in the morning of a day T0Is on, and starts to record a in state 11，c03，b01The number of vehicles staying is b due to the initial state0Number m of vehicles in straight line in state 1 as 01＝a1+b0-b01-c03Sh, the time interval of the vehicle head is used as sh, and delay control is carried out according to a green light delay method;
step 2, the number of vehicles passing through the intersection of the primary and secondary trunk roads in the state 2 is a2+b01When the left turn queue length is c03I.e. number m of left-turn queued vehicles3＝c03The/sh is used for carrying out delay control according to a green light delay method;
step 3, before the state 3 is changed into the state 1, the number b of the vehicles staying at the main road entrance lane of the main and secondary urban road intersection is counted0'＝a1+b0-a2-b01-b03；
Step 4, mixing b0Is assigned to b0And re-entering the state 1, simultaneously resetting all the sensors and acquiring data again, and skipping to the step 1.
2. The intelligent signal lamp control method based on the urban main road and secondary road intersection as claimed in claim 1, wherein the green light delay method is as follows:
setting the maximum number of queued vehicles at a certain time of a required delay lane to be N in a peak period, setting the effective green time to be T when the queued vehicles pass through an intersection and setting the effective green time to be T when a secondary trunk road is in a green state, and when m is in a period2>m02Or m3>m03The phase of the green light is extended for a period of time
The phase left-turn green light has an extended time of
The maximum delay time is controlled within 10 s.
3. The intelligent signal lamp control method based on urban main and secondary road intersections according to claim 1, characterized in that the turn-on time T is0The value is 6:00-7:00 according to the setting of each situation.
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| CN109003444B (en) * | 2018-07-02 | 2020-09-18 | 北方工业大学 | Urban intersection overflow control method based on wide area radar microwave detector |
| CN110796753B (en) * | 2019-11-01 | 2022-05-13 | 山东中创软件工程股份有限公司 | Road vehicle detection device and detection method |
| CN115223378B (en) * | 2022-07-07 | 2024-05-14 | 河南工业大学 | Method for judging priority control of primary and secondary roads at plane intersection |
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