CN111798679B - Signalized intersection lane green light loss time calculation method and system - Google Patents
Signalized intersection lane green light loss time calculation method and system Download PDFInfo
- Publication number
- CN111798679B CN111798679B CN202010723179.9A CN202010723179A CN111798679B CN 111798679 B CN111798679 B CN 111798679B CN 202010723179 A CN202010723179 A CN 202010723179A CN 111798679 B CN111798679 B CN 111798679B
- Authority
- CN
- China
- Prior art keywords
- time
- green light
- traffic flow
- vehicle
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/081—Plural intersections under common control
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention relates to the technical field of urban road traffic signal control, and particularly discloses a signalized intersection lane green light loss time calculation method, which comprises the following steps: generating the passing state information of the lane according to the corresponding relation between the intersection signal lamp and the lane; receiving the release state information of each entrance lane and sending the release state information to the data analysis unit in real time; detecting traffic flow running information on an entrance lane of the current intersection in real time and sending the traffic flow running information to a data analysis unit; and the data analysis unit calculates the corresponding green light loss time in different traffic scenes according to the release state information and the traffic flow running information of each entrance lane and sends the green light loss time to the traffic signal controller. The invention also discloses a system for calculating the green light loss time of the lane at the signalized intersection. The method for calculating the green light loss time of the lane of the signalized intersection can accurately acquire the green light loss time of the signalized intersection, so that data support is provided for scientific evaluation of control benefits of the signalized intersection.
Description
Technical Field
The invention relates to the technical field of urban road traffic signal control, in particular to a method and a system for calculating green light loss time of a lane at a signalized intersection.
Background
In an urban signalized intersection, due to improper setting of a signal timing scheme, vehicles cannot pass or green lights are discharged during phase discharging, valuable green light time is greatly wasted, and in order to reduce green light loss time of the signalized intersection, a traffic management department collects traffic flow data on a lane in real time by arranging a detector on an intersection entrance lane and dynamically adjusts the green light time of a signal phase in an induction control mode, so that the green light loss time of an intersection signal lamp is effectively reduced, and the passing efficiency of the intersection is improved; the green light loss time is used as an effective evaluation index, the utilization rate of the signal phase green light time can be intuitively reflected, the utilization balance degree of the phase green light time is quantized, and the defects and the optimization potential of the existing timing scheme are analyzed, so that the aim of improving the crossing traffic efficiency is fulfilled; however, the existing green light lost time acquisition mainly depends on a manual mode, the workload is large, the acquisition process is complicated, and the accuracy of data is difficult to guarantee.
In the prior art, by acquiring the green light time of a signal phase in advance, under the condition of ensuring that pedestrians safely cross the street, the idle time of an actual detector is compared with the preset maximum idle time, so that the green light loss time is acquired; the method is only suitable for timing control, and when the intersection adopts an induction control mode and a self-adaptive control mode, the signal phase time is dynamically adjusted along with the change of the traffic flow, so that the phase green time cannot be predicted in advance, and meanwhile, the green time loss caused by the fact that the vehicle occupies a road section for a long time is not considered in the prior art; therefore, the prior art has low applicability to collecting green light loss time in different signal control modes, and cannot meet the application requirements under the development of the existing intelligent traffic technology.
Therefore, how to conveniently and accurately acquire the green light loss time of the signalized intersection lane under various signal control modes becomes a technical problem which needs to be solved urgently at present.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a signalized intersection lane green light loss time calculation method and system, which can accurately acquire signalized intersection green light loss time, thereby providing data support for scientific evaluation of signalized intersection control benefits.
As a first aspect of the present invention, there is provided a signalized intersection lane green light loss time calculation method, including:
controlling the running state of a current intersection signal lamp through a main control unit, and generating release state information of each entrance lane according to the corresponding relation between the intersection signal lamp and the lanes when the color of the intersection signal lamp changes, wherein the release state information comprises a passing state and a forbidden state;
receiving the release state information of each entrance lane through a data interaction control unit, and sending the release state information of each entrance lane to a data analysis unit through a data communication unit in real time;
detecting traffic flow running information on an entrance lane of the current intersection in real time through a traffic flow detection unit, and sending the traffic flow running information to the data analysis unit;
and calculating the corresponding green light loss time in different traffic scenes according to the release state information of each entrance lane and the traffic flow running information by the data analysis unit, and sending the green light loss time to a traffic signal controller by the data communication unit.
Further, when the data analysis unit receives the traffic state information of each entrance lane, the traffic flow detection unit is controlled to start detecting traffic flow running information on the entrance lane of the current intersection; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils;
and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information.
Further, the calculating the total green light loss time of each entrance lane during the green light passing period according to the traffic flow operation information includes:
respectively acquiring the time when each vehicle enters the detection coil and the time when each vehicle leaves the detection coil;
the time when the vehicle leaves the detection coil is subtracted by the time when the vehicle enters the detection coil, and the time when the vehicle occupies the detection coil is used as the time length of the detection coil;
the difference value obtained by subtracting the critical coil occupancy time length from the vehicle occupancy detection coil time length is used as the vehicle occupancy green light loss time;
the detection coil occupancy time length calculation formula is as follows:
Ti possess of＝Ti Go out-Ti Into
Wherein, Ti Possess ofDuration of occupancy detection coil for i-th vehicle, Ti Go outIs the ith vehicleMoment of vehicle leaving detection coil, Ti IntoThe moment when the ith vehicle enters the detection coil;
the calculation formula of the green light occupation lost time is as follows:
wherein, Ti Occupation of green spaceThe time lost for the ith vehicle to occupy the green light,
occupying the coil for a critical length of time.
Further, the minimum green light time of an entrance lane is set through the main control unit, and the minimum green light time is sent to the data interaction control unit;
the received minimum green light time is sent to the data analysis unit in real time through the data communication unit through the data interaction control unit;
when the data analysis unit receives the traffic state information of each entrance lane, controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils;
and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information and the minimum green light time.
Further, the calculating, according to the traffic flow operation information and the minimum green light time, a total green light loss time of each entrance lane during a current green light passing period includes:
after the minimum green light time, starting to acquire a workshop time interval between two adjacent vehicles, wherein the workshop time interval is the difference value obtained by subtracting the moment when the former vehicle leaves the detection coil from the moment when the latter vehicle enters the detection coil;
taking the difference value obtained by subtracting the coil idle discharge critical time length from the workshop time interval as the idle discharge green light loss time of the vehicle;
the time interval T between two adjacent vehiclesi Time interval between workshopsThe calculation formula is as follows:
wherein the content of the first and second substances,
time at which the i +1 th vehicle enters the detection coil, Ti Go outThe moment when the ith vehicle leaves the detection coil;
the formula for calculating the lost time of the vacant green lamp is as follows:
wherein, Ti Loss of greenness in airTime is lost for the empty green light of the ith vehicle,
the coil is left empty for a critical duration.
As a second aspect of the present invention, there is provided a system for calculating green light loss time of a lane at a signalized intersection, comprising a traffic signal controller and a green light loss time acquisition system, wherein the traffic signal controller comprises a main control unit and a data interaction control unit connected to the main control unit, the green light loss time acquisition system comprises a data analysis unit, and a traffic flow detection unit and a data communication unit respectively connected to the data analysis unit, and the data communication unit is connected to the data interaction control unit, wherein,
the main control unit is used for controlling the running state of a current intersection signal lamp, and generating the passing state information of each entrance lane according to the corresponding relation between the intersection signal lamp and the lane when the color of the intersection signal lamp changes, wherein the passing state information comprises a passing state and a forbidden state;
the data interaction control unit is used for receiving the release state information of each entrance lane and sending the release state information of each entrance lane to the data analysis unit in real time through the data communication unit;
the traffic flow detection unit is used for detecting traffic flow running information on an entrance lane of the current intersection in real time and sending the traffic flow running information to the data analysis unit;
and the data analysis unit is used for calculating corresponding green light loss time in different traffic scenes according to the release state information of each entrance lane and the traffic flow running information, and sending the green light loss time to the traffic signal controller through the data communication unit.
Further, the data analysis unit is further configured to control the traffic flow detection unit to start detecting traffic flow operation information on an entrance lane of the current intersection when the traffic state information of each entrance lane is received; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils; and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information.
Further, the data analysis unit is, in particular,
respectively acquiring the time when each vehicle enters the detection coil and the time when each vehicle leaves the detection coil;
the time when the vehicle leaves the detection coil is subtracted by the time when the vehicle enters the detection coil, and the time when the vehicle occupies the detection coil is used as the time length of the detection coil;
the difference value obtained by subtracting the critical coil occupancy time length from the vehicle occupancy detection coil time length is used as the vehicle occupancy green light loss time;
the detection coil occupancy time length calculation formula is as follows:
Ti possess of＝Ti Go out-Ti Into
Wherein, Ti Possess ofDuration of occupancy detection coil for i-th vehicle, Ti Go outFor the ith vehicle leaving detection coil time, Ti IntoThe moment when the ith vehicle enters the detection coil;
the calculation formula of the green light occupation lost time is as follows:
wherein, Ti Occupation of green spaceThe time lost for the ith vehicle to occupy the green light,
occupying the coil for a critical length of time.
Furthermore, the main control unit is further configured to set a minimum green light time of an entrance lane, and send the minimum green light time to the data interaction control unit;
the data interaction control unit is also used for sending the received minimum green light time to the data analysis unit in real time through the data communication unit;
the data analysis unit is further used for controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection when the traffic state information of each entrance lane is received; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils; and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information and the minimum green light time.
Further, the data analysis unit is, in particular,
after the minimum green light time, starting to acquire a workshop time interval between two adjacent vehicles, wherein the workshop time interval is the difference value obtained by subtracting the moment when the former vehicle leaves the detection coil from the moment when the latter vehicle enters the detection coil;
taking the difference value obtained by subtracting the coil idle discharge critical time length from the workshop time interval as the idle discharge green light loss time of the vehicle;
the time interval T between two adjacent vehiclesi Time interval between workshopsThe calculation formula is as follows:
wherein the content of the first and second substances,
time at which the i +1 th vehicle enters the detection coil, Ti Go outThe moment when the ith vehicle leaves the detection coil;
the formula for calculating the lost time of the vacant green lamp is as follows:
wherein, Ti Loss of greenness in airTime is lost for the empty green light of the ith vehicle,
the coil is left empty for a critical duration.
The method and the system for calculating the green light loss time of the lane at the signalized intersection have the following advantages:
(1) by acquiring the lane release state information in real time, the lane green light loss time acquisition method is not only suitable for timing control modes such as multi-period and multi-scheme and the like, but also suitable for acquiring lane green light loss time of which the phase green light time cannot be predicted in advance under dynamic optimization control modes such as induction control, adaptive control and the like, and has wider application range;
(2) green light waste caused by long-time occupation of a lane section by a vehicle and empty discharge of green lights is comprehensively considered, so that green light lost time is calculated more comprehensively and accurately, and accurate data support is provided for visually reflecting the utilization rate of signal phase green light time, quantizing the utilization balance degree of green light time of an imported lane and improving road traffic capacity;
(3) the acquisition mode of the green light lost time is diversified, and the method is not only suitable for non-contact detection modes such as videos and microwaves, but also can use contact detection modes such as traditional annular coils and geomagnetism.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is an overall flowchart of a method for calculating green light loss time of a lane at a signalized intersection in the embodiment of the invention.
Fig. 2 is a specific flowchart of a method for calculating green light loss time of a lane at a signalized intersection according to an embodiment of the present invention.
Fig. 3 is a structural diagram of a system for calculating green light loss time of a lane at a signalized intersection according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a method for calculating the occupied green light loss time in scenario one in the embodiment of the present invention.
Fig. 5 is a schematic diagram of a method for calculating a loss time of a hollow green light in scene two according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of an embodiment of a method for calculating green light loss time of a lane at a signalized intersection according to the embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined purpose, the following detailed description will be given to the method and system for calculating green light loss time of a lane at a signalized intersection, and the specific implementation, structure, features and effects thereof according to the present invention, with reference to the accompanying drawings and preferred embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In this embodiment, a method for calculating green light loss time of a lane at a signalized intersection is provided, and as shown in fig. 1, the method for calculating green light loss time of a lane at a signalized intersection includes:
step S110: controlling the running state of a current intersection signal lamp through a main control unit, and generating release state information of each entrance lane according to the corresponding relation between the intersection signal lamp and the lanes when the color of the intersection signal lamp changes, wherein the release state information comprises a passing state and a forbidden state;
step S120: receiving the release state information of each entrance lane through a data interaction control unit, and sending the release state information of each entrance lane to a data analysis unit through a data communication unit in real time;
step S130: detecting traffic flow running information on an entrance lane of the current intersection in real time through a traffic flow detection unit, and sending the traffic flow running information to the data analysis unit;
step S140: and calculating the corresponding green light loss time in different traffic scenes according to the release state information of each entrance lane and the traffic flow running information by the data analysis unit, and sending the green light loss time to a traffic signal controller by the data communication unit.
Specifically, the release state information of each entrance lane is used for informing the green light loss time acquisition system, the currently detected entrance lane is in a passing state or a forbidden state, and the sent data structure is as follows: { lane number, release status }; wherein, the lane serial numbers are numbered from the north entrance according to the clockwise; the release state comprises a pass state and a forbid state; the traffic signal controller sends the passing state information of the entrance lane once every 0.5 second.
The following describes the calculation method of green light loss time of the lane at the signalized intersection in detail with reference to fig. 2; the calculation of the green light loss time of the signalized intersection comprises two scenes, wherein when the current signalized intersection passes through the lane, vehicles at a downstream intersection overflow to an upstream intersection, so that the vehicles at an entrance lane of the upstream intersection (namely the current signalized intersection lane) cannot pass through, and the green light is wasted; and in the second scenario, when the signal lamp release time exceeds the minimum green lamp time, after the previous vehicle passes through the detection section, the subsequent vehicle passes through the detection section at a longer interval, so that the green lamp is released in an empty state.
As shown in fig. 2, first, a lane clearance state is acquired; secondly, judging whether the current lane is released, if the current lane is in a release state, namely when the current lane passes, calculating green light occupation loss time corresponding to a scene one and vacant green light release loss time corresponding to a scene two, and caching the calculated green light loss time; continuously judging whether the current lane is released, and when the current lane is released, calculating the green light occupation loss time corresponding to the scene one and the vacant green light loss time corresponding to the scene two again until the lane is in a forbidden state; and then, calculating the total green light loss time of the lane during the green light release period.
Preferably, when the data analysis unit receives the traffic state information of each entrance lane, the traffic flow detection unit is controlled to start detecting traffic flow running information on the entrance lane of the current intersection; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils;
and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information.
Specifically, as shown in fig. 4, the calculating, according to the traffic flow operation information, a total green light loss time of each entrance lane during the current green light passing period, that is, calculating a green light occupation loss time corresponding to a scene, includes:
respectively acquiring the time when each vehicle enters the detection coil and the time when each vehicle leaves the detection coil;
the time when the vehicle leaves the detection coil is subtracted by the time when the vehicle enters the detection coil, and the time when the vehicle occupies the detection coil is used as the time length of the detection coil;
the difference value obtained by subtracting the critical coil occupancy time length from the vehicle occupancy detection coil time length is used as the vehicle occupancy green light loss time;
the lane is at TsThe passage is started at the moment TeForbidding operation at the moment, wherein the detection coil occupation time length calculation formula is as follows:
Ti possess of＝Ti Go out-Ti Into
Wherein, Ti Possess ofDuration of occupancy detection coil for i-th vehicle, Ti Go outFor the ith vehicle leaving detection coil time, Ti IntoThe moment when the ith vehicle enters the detection coil;
the calculation formula of the green light occupation lost time is as follows:
wherein, Ti Occupation of green spaceThe time lost for the ith vehicle to occupy the green light,
occupying the coil for a critical length of time.
Preferably, the traffic flow detection unit judges the time length of the detection coil occupied by the vehicle once every 0.1 second, and the data analysis unit judges the traffic state information of the lane once every 0.1 second.
Preferably, the minimum green light time of the entrance lane is set through the main control unit, and the minimum green light time is sent to the data interaction control unit;
the received minimum green light time is sent to the data analysis unit in real time through the data communication unit through the data interaction control unit;
when the data analysis unit receives the traffic state information of each entrance lane, controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils;
and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information and the minimum green light time.
It should be noted that the minimum green time of the entrance lane is used to ensure the stable operation of the traffic flow of the lane, and the signal configuration scheme within a period of time corresponds to the minimum green time of one lane, so that the minimum green time of the lane needs to be sent only when the signal configuration scheme is switched; for example, different time periods correspond to different minimum green time periods, the minimum green time period is longer when the user gets on or off duty peak, and the minimum green time period is shorter when the user gets on or off duty peak.
Specifically, as shown in fig. 5, the calculating, according to the traffic flow operation information and the minimum green light time, a total green light loss time of each entrance lane during the current green light passing period, that is, calculating an idle green light loss time corresponding to a scene two includes:
after the minimum green light time, starting to acquire a workshop time interval between two adjacent vehicles, wherein the workshop time interval is the difference value obtained by subtracting the moment when the former vehicle leaves the detection coil from the moment when the latter vehicle enters the detection coil;
taking the difference value obtained by subtracting the coil idle discharge critical time length from the workshop time interval as the idle discharge green light loss time of the vehicle;
the lane is at TsThe passage is started at the moment TeForbidding at any moment, wherein the workshop time interval T between two adjacent vehiclesi Time interval between workshopsThe calculation formula is as follows:
wherein the content of the first and second substances,
time at which the i +1 th vehicle enters the detection coil, Ti Go outThe moment when the ith vehicle leaves the detection coil;
the formula for calculating the lost time of the vacant green lamp is as follows:
wherein, Ti Loss of greenness in airTime is lost for the empty green light of the ith vehicle,
the coil is left empty for a critical duration.
Preferably, the detection position of the traffic flow detection unit is arranged at a position 2-3 meters away from the stop line on the entrance lane of the current intersection; the detection method can be a contact detection method such as a ring coil and geomagnetism, and can also be a non-contact detection method such as video and microwave, and the detection can be carried out by arranging a virtual detection coil.
As shown in fig. 6, fig. 6 is a specific example of a method for calculating green light loss time of a lane at a signalized intersection according to an embodiment of the present invention, where an initial vehicle at the intersection passes slowly due to overflow of a downstream intersection, and after a period of time, the vehicle passes gradually return to normal;
the minimum green time of the lane at the intersection is 15s, timing is started when a lane 'pass' message is received, a lane 'no-pass' message is received at 40s, and C exists during the green light release period1To C7A total of 7 vehicles pass the stop line, and the time when each vehicle enters and leaves the detection coil can be seen in fig. 6, which is shown as C in the following table1To C77 vehicles enter the detection coil, leave the detection coil, occupy the detection coil duration and the specific numerical value corresponding table of the workshop time interval;
assuming that the critical coil occupancy time period is 2 seconds and the critical coil idle time period is 3 seconds, it can be seen from the above table that the occupancy detection coil time periods of the C1 and C2 vehicles exceed 2 secondsIf the time interval (idle time) between vehicles exceeds 3 seconds after the vehicles C5, C6 and C7 are released, the total green light loss time of the current phase release is CTotal green loss＝COccupation of green space+CLoss of greenness in airWhen the total green light loss time is 14.4s and the actual effective green light time is C, the total green light loss time is 14.4s, and the total green light loss time is 14.6-2) + (5.1-2) + (4.9-3) + (5.2-3) + (6.6-3): 14.4sEffective green40-14.4-25.6 s, and 25.6/40-64.0%.
As another embodiment of the present invention, as shown in fig. 3, a system for calculating green light loss time of a lane at a signalized intersection is provided, which includes a traffic signal controller and a green light loss time acquisition system, wherein the traffic signal controller includes a main control unit and a data interaction control unit connected to the main control unit, the green light loss time acquisition system includes a data analysis unit, and a traffic flow detection unit and a data communication unit respectively connected to the data analysis unit, and the data communication unit is connected to the data interaction control unit, wherein,
the main control unit is used for controlling the running state of a current intersection signal lamp, and generating the passing state information of each entrance lane according to the corresponding relation between the intersection signal lamp and the lane when the color of the intersection signal lamp changes, wherein the passing state information comprises a passing state and a forbidden state;
the data interaction control unit is used for receiving the release state information of each entrance lane and sending the release state information of each entrance lane to the data analysis unit in real time through the data communication unit;
the traffic flow detection unit is used for detecting traffic flow running information on an entrance lane of the current intersection in real time and sending the traffic flow running information to the data analysis unit;
and the data analysis unit is used for calculating corresponding green light loss time in different traffic scenes according to the release state information of each entrance lane and the traffic flow running information, and sending the green light loss time to the traffic signal controller through the data communication unit.
Preferably, the traffic signal controller and the green light lost time acquisition system are in data communication through RJ45 or RS485 electric connection.
Preferably, the data analysis unit is further configured to control the traffic flow detection unit to start detecting traffic flow running information on an entrance lane of a current intersection when the traffic state information of each entrance lane is received; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils; and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information.
In particular, the data analysis unit is particularly adapted to,
respectively acquiring the time when each vehicle enters the detection coil and the time when each vehicle leaves the detection coil;
the time when the vehicle leaves the detection coil is subtracted by the time when the vehicle enters the detection coil, and the time when the vehicle occupies the detection coil is used as the time length of the detection coil;
the difference value obtained by subtracting the critical coil occupancy time length from the vehicle occupancy detection coil time length is used as the vehicle occupancy green light loss time;
the detection coil occupancy time length calculation formula is as follows:
Ti possess of＝Ti Go out-Ti Into
Wherein, Ti Possess ofDuration of occupancy detection coil for i-th vehicle, Ti Go outFor the ith vehicle leaving detection coil time, Ti IntoThe moment when the ith vehicle enters the detection coil;
the calculation formula of the green light occupation lost time is as follows:
wherein, Ti Occupation of green spaceThe time lost for the ith vehicle to occupy the green light,
occupying the coil for a critical length of time.
Preferably, the main control unit is further configured to set a minimum green light time of an entrance lane, and send the minimum green light time to the data interaction control unit;
the data interaction control unit is also used for sending the received minimum green light time to the data analysis unit in real time through the data communication unit;
the data analysis unit is further used for controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection when the traffic state information of each entrance lane is received; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils; and calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information and the minimum green light time.
In particular, the data analysis unit is particularly adapted to,
after the minimum green light time, starting to acquire a workshop time interval between two adjacent vehicles, wherein the workshop time interval is the difference value obtained by subtracting the moment when the former vehicle leaves the detection coil from the moment when the latter vehicle enters the detection coil;
taking the difference value obtained by subtracting the coil idle discharge critical time length from the workshop time interval as the idle discharge green light loss time of the vehicle;
the time interval T between two adjacent vehiclesi Time interval between workshopsThe calculation formula is as follows:
wherein the content of the first and second substances,
is the (i + 1) th vehicleMoment of vehicle entering detection coil, Ti Go outThe moment when the ith vehicle leaves the detection coil;
the formula for calculating the lost time of the vacant green lamp is as follows:
wherein, Ti Loss of greenness in airTime is lost for the empty green light of the ith vehicle,
the coil is left empty for a critical duration.
According to the method and the system for calculating the green light loss time of the lane at the signalized intersection, provided by the invention, the lane release state information is obtained in real time, so that the method and the system are not only suitable for timing control modes such as multi-period and multi-scheme and the like, but also suitable for collecting the green light loss time of the lane, the phase green light time of which cannot be predicted in advance, under dynamic optimization control modes such as induction control, adaptive control and the like, and the application range is wider; green light waste caused by long-time occupation of a lane section by a vehicle and empty discharge of green lights is comprehensively considered, so that green light loss time is calculated more accurately, and accurate data support is provided for visually reflecting the utilization rate of signal phase green light time, quantizing the utilization balance degree of green light time of an imported lane and improving road traffic capacity; the acquisition mode of the green light lost time is diversified, and the method is not only suitable for non-contact detection modes such as videos and microwaves, but also can use contact detection modes such as traditional annular coils and geomagnetism.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A signalized intersection lane green light loss time calculation method is characterized by comprising the following steps:
controlling the running state of a current intersection signal lamp through a main control unit, and generating release state information of each entrance lane according to the corresponding relation between the intersection signal lamp and the lanes when the color of the intersection signal lamp changes, wherein the release state information comprises a passing state and a forbidden state;
receiving the release state information of each entrance lane through a data interaction control unit, and sending the release state information of each entrance lane to a data analysis unit through a data communication unit in real time;
detecting traffic flow running information on an entrance lane of the current intersection in real time through a traffic flow detection unit, and sending the traffic flow running information to the data analysis unit;
calculating corresponding green light loss time in different traffic scenes according to the release state information of each entrance lane and the traffic flow running information through the data analysis unit, and sending the green light loss time to a traffic signal controller through the data communication unit;
the traffic scene one:
when the data analysis unit receives the traffic state information of each entrance lane, controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils;
calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information;
respectively acquiring the time when each vehicle enters the detection coil and the time when each vehicle leaves the detection coil;
the time when the vehicle leaves the detection coil is subtracted by the time when the vehicle enters the detection coil, and the time when the vehicle occupies the detection coil is used as the time length of the detection coil;
the difference value obtained by subtracting the critical coil occupancy time length from the vehicle occupancy detection coil time length is used as the vehicle occupancy green light loss time;
the detection coil occupancy time length calculation formula is as follows:
Ti possess of＝Ti Go out-Ti Into
Wherein, Ti Possess ofDuration of occupancy detection coil for i-th vehicle, Ti Go outFor the ith vehicle leaving detection coil time, Ti IntoThe moment when the ith vehicle enters the detection coil;
the calculation formula of the green light occupation lost time is as follows:
wherein, Ti Occupation of green spaceThe time lost for the ith vehicle to occupy the green light,
occupying a critical time period for the coil;
and a second traffic scene:
setting the minimum green light time of an entrance lane through the main control unit, and sending the minimum green light time to the data interaction control unit;
the received minimum green light time is sent to the data analysis unit in real time through the data communication unit through the data interaction control unit;
when the data analysis unit receives the traffic state information of each entrance lane, controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils;
calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information and the minimum green light time;
after the minimum green light time, starting to acquire a workshop time interval between two adjacent vehicles, wherein the workshop time interval is the difference value obtained by subtracting the moment when the former vehicle leaves the detection coil from the moment when the latter vehicle enters the detection coil;
taking the difference value obtained by subtracting the coil idle discharge critical time length from the workshop time interval as the idle discharge green light loss time of the vehicle;
the time interval T between two adjacent vehiclesi Time interval between workshopsThe calculation formula is as follows:
wherein the content of the first and second substances,
time at which the i +1 th vehicle enters the detection coil, Ti Go outThe moment when the ith vehicle leaves the detection coil;
the formula for calculating the lost time of the vacant green lamp is as follows:
wherein, Ti Loss of greenness in airTime is lost for the empty green light of the ith vehicle,
the coil is left empty for a critical duration.
2. A signalized intersection lane green light loss time calculation system is characterized by comprising a traffic signal controller and a green light loss time acquisition system, wherein the traffic signal controller comprises a main control unit and a data interaction control unit connected with the main control unit, the green light loss time acquisition system comprises a data analysis unit, a traffic flow detection unit and a data communication unit, the traffic flow detection unit and the data communication unit are respectively connected with the data analysis unit, the data communication unit is connected with the data interaction control unit, and the traffic flow detection unit and the data communication unit are respectively connected with the data analysis unit,
the main control unit is used for controlling the running state of a current intersection signal lamp, and generating the passing state information of each entrance lane according to the corresponding relation between the intersection signal lamp and the lane when the color of the intersection signal lamp changes, wherein the passing state information comprises a passing state and a forbidden state;
the data interaction control unit is used for receiving the release state information of each entrance lane and sending the release state information of each entrance lane to the data analysis unit in real time through the data communication unit;
the traffic flow detection unit is used for detecting traffic flow running information on an entrance lane of the current intersection in real time and sending the traffic flow running information to the data analysis unit;
the data analysis unit is used for calculating corresponding green light loss time in different traffic scenes according to the release state information of each entrance lane and the traffic flow running information, and sending the green light loss time to the traffic signal controller through the data communication unit;
the traffic scene one:
the data analysis unit is further used for controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection when the traffic state information of each entrance lane is received; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils; calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information;
the data analysis unit is, in particular,
respectively acquiring the time when each vehicle enters the detection coil and the time when each vehicle leaves the detection coil;
the time when the vehicle leaves the detection coil is subtracted by the time when the vehicle enters the detection coil, and the time when the vehicle occupies the detection coil is used as the time length of the detection coil;
the difference value obtained by subtracting the critical coil occupancy time length from the vehicle occupancy detection coil time length is used as the vehicle occupancy green light loss time;
the detection coil occupancy time length calculation formula is as follows:
Ti possess of＝Ti Go out-Ti Into
Wherein, Ti Possess ofDuration of occupancy detection coil for i-th vehicle, Ti Go outFor the ith vehicle leaving detection coil time, Ti IntoThe moment when the ith vehicle enters the detection coil;
the calculation formula of the green light occupation lost time is as follows:
wherein, Ti Occupation of green spaceThe time lost for the ith vehicle to occupy the green light,
occupying a critical time period for the coil;
and a second traffic scene:
the main control unit is also used for setting the minimum green light time of the entrance lane and sending the minimum green light time to the data interaction control unit;
the data interaction control unit is also used for sending the received minimum green light time to the data analysis unit in real time through the data communication unit;
the data analysis unit is further used for controlling the traffic flow detection unit to start detecting traffic flow running information on the entrance lane of the current intersection when the traffic state information of each entrance lane is received; the traffic flow detection unit comprises detection coils, and the traffic flow operation information comprises the time when each vehicle enters the detection coils and the time when each vehicle leaves the detection coils; calculating the total green light loss time of each entrance lane during the current green light passing period according to the traffic flow operation information and the minimum green light time;
the data analysis unit is, in particular,
after the minimum green light time, starting to acquire a workshop time interval between two adjacent vehicles, wherein the workshop time interval is the difference value obtained by subtracting the moment when the former vehicle leaves the detection coil from the moment when the latter vehicle enters the detection coil;
taking the difference value obtained by subtracting the coil idle discharge critical time length from the workshop time interval as the idle discharge green light loss time of the vehicle;
the time interval T between two adjacent vehiclesi Time interval between workshopsThe calculation formula is as follows:
wherein the content of the first and second substances,
time at which the i +1 th vehicle enters the detection coil, Ti Go outThe moment when the ith vehicle leaves the detection coil;
the formula for calculating the lost time of the vacant green lamp is as follows:
wherein, Ti Loss of greenness in airTime is lost for the empty green light of the ith vehicle,
the coil is left empty for a critical duration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010723179.9A CN111798679B (en) | 2020-07-24 | 2020-07-24 | Signalized intersection lane green light loss time calculation method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010723179.9A CN111798679B (en) | 2020-07-24 | 2020-07-24 | Signalized intersection lane green light loss time calculation method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111798679A CN111798679A (en) | 2020-10-20 |
| CN111798679B true CN111798679B (en) | 2021-10-22 |
Family
ID=72828795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010723179.9A Active CN111798679B (en) | 2020-07-24 | 2020-07-24 | Signalized intersection lane green light loss time calculation method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111798679B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113643537B (en) * | 2021-08-11 | 2022-08-05 | 公安部交通管理科学研究所 | Method and system for detecting characteristic parameters of traffic state of import lane |
| CN113763727A (en) * | 2021-09-16 | 2021-12-07 | 公安部交通管理科学研究所 | Traffic signal on-line control method for road intersection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331170A (en) * | 2017-09-01 | 2017-11-07 | 山东创飞客交通科技有限公司 | The intersection signal timing evaluation method and system of time is lost based on green light |
| CN108269400A (en) * | 2018-01-25 | 2018-07-10 | 山东交通学院 | A kind of trunk roads signalized crossing delay evaluation method and device |
| CN109754619A (en) * | 2017-11-02 | 2019-05-14 | 杭州海康威视数字技术股份有限公司 | Single-point traffic signal control method, device, traffic signaling equipment and storage medium |
| CN110956804A (en) * | 2019-11-19 | 2020-04-03 | 中电海康集团有限公司 | Intersection signal timing diagnosis method |
-
2020
- 2020-07-24 CN CN202010723179.9A patent/CN111798679B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331170A (en) * | 2017-09-01 | 2017-11-07 | 山东创飞客交通科技有限公司 | The intersection signal timing evaluation method and system of time is lost based on green light |
| CN109754619A (en) * | 2017-11-02 | 2019-05-14 | 杭州海康威视数字技术股份有限公司 | Single-point traffic signal control method, device, traffic signaling equipment and storage medium |
| CN108269400A (en) * | 2018-01-25 | 2018-07-10 | 山东交通学院 | A kind of trunk roads signalized crossing delay evaluation method and device |
| CN110956804A (en) * | 2019-11-19 | 2020-04-03 | 中电海康集团有限公司 | Intersection signal timing diagnosis method |
Non-Patent Citations (1)
| Title |
|---|
| 基于第一辆车辆到达的进口道延误计算方法分析;杨林玉;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20190115;C034-2400 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111798679A (en) | 2020-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111798679B (en) | Signalized intersection lane green light loss time calculation method and system | |
| CN110570670B (en) | Road section pedestrian crossing signal system and method based on video pedestrian detection | |
| CN110264717B (en) | Urban intelligent traffic regulation and control system | |
| CN110728844B (en) | Traffic light self-adaptive control method and device, traffic control equipment and storage medium | |
| CN111882894A (en) | Intelligent traffic signal lamp control method and system | |
| CN111028523A (en) | Signal lamp control method, device and equipment | |
| KR101666086B1 (en) | traffic light control and rest time indicate control apparatus | |
| CN109584583B (en) | Intelligent refined control system and method for same-phase right-turn vehicles and street-crossing pedestrians | |
| CN109308810A (en) | A kind of motor vehicle and slow-moving traffic Conflict solving intelligence control system and method | |
| CN108597252A (en) | A kind of traffic light intersection pedestrian and vehicle safety passing intelligent decision-making system and method | |
| CN111564046B (en) | Self-adaptive channel borrowing left-turn system and method based on video detection | |
| CN113409596A (en) | Full-automatic intelligent flow control traffic system and intelligent traffic flow control method | |
| CN109003460A (en) | Traffic lights Optimization Scheduling and system | |
| CN114694393B (en) | Method and device for adjusting phase duration, storage medium and electronic equipment | |
| CN115938141A (en) | Sidewalk traffic signal lamp with dynamic identification and intelligent adjustment functions | |
| CN111951570A (en) | Control method, device and system of traffic signal lamp | |
| CN110992684B (en) | Active prediction type signal control method and system based on video detection | |
| CN108513417B (en) | Low-energy-consumption underground parking garage illumination system and control method | |
| CN116567891A (en) | Intelligent street lamp dimming control method and system | |
| CN114241794B (en) | Traffic light automatic control and adjustment method | |
| CN116246478A (en) | Vehicle parking system and implementation method thereof | |
| CN113538948B (en) | Parking space navigation system and method based on wireless sensing technology of Internet of things | |
| CN110910631A (en) | Pedestrian crossing control system and pedestrian crossing control method based on multi-source triggering | |
| CN115424459B (en) | Trunk line coordination method and storage medium | |
| CN218038288U (en) | Self-adaptive dynamic signal lamp display system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |