CN111613053B - Traffic disturbance detection and analysis method, device, storage medium and terminal - Google Patents
Traffic disturbance detection and analysis method, device, storage medium and terminal Download PDFInfo
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- CN111613053B CN111613053B CN202010314603.4A CN202010314603A CN111613053B CN 111613053 B CN111613053 B CN 111613053B CN 202010314603 A CN202010314603 A CN 202010314603A CN 111613053 B CN111613053 B CN 111613053B
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- G08G1/01—Detecting movement of traffic to be counted or controlled
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Abstract
The invention discloses a traffic disturbance detection and analysis method, a device, a storage medium and a terminal, wherein the method comprises the following steps: calculating and generating a parameter set corresponding to the traffic flow of the road in different time periods according to the road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate; generating a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow in different time periods; and judging whether traffic disturbance occurs or not according to the change trend. Therefore, by adopting the embodiment of the application, the accurate quantitative perception and monitoring of the traffic operation condition can be realized.
Description
Technical Field
The present invention relates to the field of traffic informatization, and in particular, to a method and an apparatus for detecting and analyzing traffic disturbance, a storage medium, and a terminal.
Background
With the continuous expansion of urban scale and the continuous increase of automobile holding capacity, the traffic pressure of various domestic large and medium-sized cities is gradually increased, and solving the traffic problem becomes an important subject for improving the livelihood of various cities. The traffic road network is compared with the blood vessels of a human body, if symptoms such as thrombus and the like appear in the blood vessels, the blood vessels are congested, if the symptoms are not enough, blood flow is not smooth, other pathological changes of the body are caused, if the symptoms are not enough, blood is directly cut off, and fatal diseases such as myocardial infarction and the like are caused. Similarly, various congestion occurs on the traffic network at any moment, for example, road channeling suddenly narrows (bell mouth), sudden traffic accidents, signal intersections, road maintenance or sanitation cleaning, severe weather, road damage caused by geological disasters, and the like, all or part of lanes on a specific time period and a specific road section lose traffic capacity, and queuing and traffic jam are caused under the condition of large traffic flow, and even local road network paralysis is caused.
In the current technical scheme, only the influence of specific factors such as accidents, control, traffic weather and the like on the running condition of the road network is generally concerned, analysis is carried out according to the specific factors and control measures are taken, and the method can not detect the problems of traffic roads in real time, so that traffic queuing and traffic jam occur, and even local road network paralysis is caused.
Disclosure of Invention
The embodiment of the application provides a traffic disturbance detection and analysis method, a traffic disturbance detection and analysis device, a storage medium and a terminal. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
In a first aspect, an embodiment of the present application provides a method for detecting and analyzing a traffic disturbance, where the method includes:
calculating and generating a parameter set corresponding to the traffic flow of the road in different time periods according to the road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate;
generating a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow in different time periods;
and judging whether traffic disturbance occurs or not according to the change trend.
Optionally, the determining whether the traffic disturbance occurs according to the change trend includes:
acquiring the vehicle passing number of a first time period;
calculating based on the vehicle passing number of the first time period, and generating a first parameter set, wherein the first parameter set comprises a first change rate, a first entrance rate and a first entrance rate;
acquiring the vehicle passing number of a second time period, wherein the final time of the second time period is later than the final time of the first time period for the current time;
calculating based on the vehicle passing number in the second time period to generate a second parameter set, wherein the second parameter set comprises a second change rate, a second entrance rate and a second entrance rate;
and when each parameter value in the second parameter set is smaller than each corresponding parameter value in the first parameter set, starting traffic disturbance.
Optionally, after determining whether a traffic disturbance occurs according to the change trend, the method further includes:
when the traffic disturbance starts, according to the influence range of the traffic disturbance and the influenced traffic flow, carrying out disturbance degree grade evaluation on the traffic disturbance, and generating a grade value corresponding to the traffic disturbance.
Optionally, after the generating the level value corresponding to the traffic disturbance, the method further includes:
and establishing a description mechanism for analysis according to the traffic disturbance and the grade value corresponding to the traffic disturbance.
Optionally, the establishing a description mechanism for analysis according to the traffic disturbance and the level value corresponding to the traffic disturbance includes:
and carrying out statistical analysis based on time dimension through the traffic disturbance and the grade value corresponding to the traffic disturbance.
Optionally, the establishing a description mechanism for analysis according to the traffic disturbance and the level value corresponding to the traffic disturbance includes:
and carrying out statistical analysis based on space dimensionality through the traffic disturbance and the grade value corresponding to the traffic disturbance.
Optionally, the establishing a description mechanism for analysis according to the traffic disturbance and the level value corresponding to the traffic disturbance includes:
and analyzing based on the traffic disturbance type according to the traffic disturbance and the grade value corresponding to the traffic disturbance.
In a second aspect, an embodiment of the present application provides a device for detecting and analyzing a traffic disturbance, where the device includes:
the set generation module is used for calculating and generating a parameter set corresponding to the traffic flow of the road in different time periods according to the road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate;
the change rate generation module is used for generating change trends corresponding to the change rate, the entrance rate and the entrance rate based on the parameter sets corresponding to the traffic flow in different time periods;
and the disturbance judgment module is used for judging whether traffic disturbance occurs according to the change trend.
In a third aspect, embodiments of the present application provide a computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the above-mentioned method steps.
In a fourth aspect, an embodiment of the present application provides a terminal, which may include: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the above-mentioned method steps.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the embodiment of the application, a user terminal firstly calculates and generates a parameter set corresponding to traffic flow of a road in different time periods according to a road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate, then generates a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow of different time periods, and finally judges whether traffic disturbance occurs according to the change trend. The invention starts from the phenomenon and essence that various factors influence the traffic network, can more comprehensively sense the disease condition of the road network, covers the factors of road canalization, traffic signals, emergencies, road maintenance, traffic weather and the like, and establishes discovery, tracking, influence evaluation and statistical analysis on traffic disturbance, thereby realizing the grasp of the conventional and unconventional disease condition of the road network and further guiding the targeted treatment.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic flow chart of a method for detecting and analyzing traffic disturbance according to an embodiment of the present application;
FIG. 2 is a graph illustrating a range of traffic disturbances provided by an embodiment of the present application;
FIG. 3 is a diagram comparing the driving-in and driving-out of a vehicle under normal conditions and under disturbance conditions according to an embodiment of the present application;
FIG. 4 is a comparison diagram of scene parameters provided by an embodiment of the present application;
FIG. 5 is a flow chart of traffic disturbance detection provided by an embodiment of the present application;
FIG. 6 is a topological diagram of a disturbance influence range provided by an embodiment of the present application;
FIG. 7 is a schematic flow chart illustrating another method for detecting and analyzing traffic disturbances according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a traffic disturbance detection and analysis device according to an embodiment of the present application;
FIG. 9 is a schematic structural diagram of another traffic disturbance detection and analysis device according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a disturbance determining module according to an embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Until now, for analysis of traffic disturbance, in the current technical solution, only the influence of specific factors such as accidents, control, traffic weather, etc. on the operation condition of the road network is generally concerned, and the analysis and the control measures are performed according to the specific factors, which cannot detect the problem of traffic road in real time, thereby causing traffic queuing and traffic jam, and even causing local road network paralysis. Therefore, the present application provides a method, an apparatus, a storage medium, and a terminal for detecting and analyzing traffic disturbance, so as to solve the problems in the related art. In the technical scheme provided by the application, the invention starts from the phenomenon and essence that various factors influence the traffic network, can more comprehensively sense the disease condition of the traffic network, covers the factors such as road canalization, traffic signals, emergencies, road maintenance, traffic weather and the like, and establishes discovery, tracking, influence evaluation and statistical analysis on traffic disturbance, so that the conventional and unconventional disease conditions of the traffic network can be mastered, and further the specific management can be guided, and the detailed description is given by adopting an exemplary embodiment.
The following describes in detail a method for detecting and analyzing traffic disturbance according to an embodiment of the present application with reference to fig. 1 to 7. The method may be implemented in dependence on a computer program, operable on a von neumann architecture-based traffic disturbance detection and analysis device. The computer program may be integrated into the application or may run as a separate tool-like application. The detection and analysis device for traffic disturbance in the embodiment of the present application may be a user terminal, including but not limited to: personal computers, tablet computers, handheld devices, in-vehicle devices, wearable devices, computing devices or other processing devices connected to a wireless modem, and the like. The user terminals may be called different names in different networks, for example: user equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user equipment, cellular telephone, cordless telephone, Personal Digital Assistant (PDA), terminal equipment in a 5G network or future evolution network, and the like.
Referring to fig. 1, a flow chart of a method for detecting and analyzing traffic disturbance is provided according to an embodiment of the present application. As shown in fig. 1, the method of the embodiment of the present application may include the steps of:
s101, calculating and generating a parameter set corresponding to traffic flow of the road in different time periods according to a road structure, wherein the parameter set comprises a change rate, an entrance rate and an exit rate;
when traffic bottleneck occurs, vehicles in the abnormal lane are gradually queued and move to other normal lanes to cause queuing of the vehicles in the normal lane; after the vehicle passes through the bottleneck, the vehicle inflow is reduced due to the bottleneck as the traffic capacity is increased, and the vehicle speed at the downstream of the bottleneck is greatly increased. Therefore, in the traffic bottleneck, the process of the vehicle speed changing from high to low and then from low to high is generally presented, which is equivalent to the traffic bottleneck causing a disturbance change of the vehicle speed
Generally, the essential phenomenon of traffic disturbance is that a bottleneck exists in a certain node of a road network, as shown in fig. 2(a), along the direction of traffic flow, the traffic capacity has a process from large to small and then from small to large, and the range of the road network with the traffic capacity being small is the bottleneck point. FIG. 2(b) is a road network bottleneck caused by traffic channeling; FIG. 2(c) is a traffic bottleneck caused by a sanitation vehicle driving at a low speed; FIG. 2(d) is a traffic bottleneck caused by road occupation construction; fig. 2(e) illustrates a traffic bottleneck caused by a traffic accident, and other types of bottlenecks may be included, which are not described herein.
For example, as shown in fig. 3(a), in the traffic flow direction, there is no traffic behavior on a normal road section when a disturbance occurs, and it is apparent that the traffic is not affected. Fig. 3(b) to 3(e) are diagrams showing behavior changes of the vehicle when the vehicle enters and exits after the disturbance occurs. When traffic disturbance occurs, the most intuitive expression is that the number of available lanes is reduced, the lane position where the disturbance occurs is in an unavailable state, and fig. 3(b) shows that when the disturbance starts, the traffic flow of the surrounding lanes starts to queue, the speed of the vehicle starts to decrease, and the vehicle in the disturbed lane needs to bypass the disturbed lane and change to another lane, so that the vehicles in the other lane start to queue. Fig. 3(c) shows a disturbance diffusion stage, at this time, the queuing phenomenon is propagated, the queuing distance in the range near the disturbance position is lengthened, the queuing density is increased, the vehicle speed of other lanes is slower, and a congestion behavior occurs. FIG. 3(d) shows the disturbance dissipation phase, where the queue length begins to shorten and the vehicle speed begins to recover. Fig. 3(e) shows the disturbance ending stage, in which the queuing phenomenon disappears and the vehicle speed returns to normal. It can be seen from the figure that, at different stages of disturbance, the flow of the incoming vehicles and the flow of the outgoing vehicles on the road section have obvious changes, at the starting stage of disturbance, the vehicles start to queue, the flow of the incoming vehicles from the upstream is obviously reduced, and the flow of the outgoing vehicles is also reduced under the influence of the incoming flow. At the end of the disturbance phase, the lanes increase, and the traffic flow through and out is obviously increased.
In one possible implementation, in calculating the rate of change of the vehicle flow rate, the entry rate, and the exit rate, a formula needs to be calculated first. In calculating the real-time traffic flow of the road elements, the road elements comprise expressways, high-grade highways and the like. Creating a road section position real-time flow data table, and counting road sections T ═ 1, 2, 3The number of traffic flows, where T is 15 minutes, is obtained by performing matching analysis on the travel characteristic tracks, the time characteristics, and the spatial characteristics of the vehicles at each position according to the vehicle GPS data, obtaining the travel characteristics of each vehicle, such as the time and the traffic speed of passing through the road, and storing the travel characteristics in terms of position. In practical application, the road passed by the vehicle in the driving process can be matched and converted through the GPS track data of the vehicle. Recording the road flow at the current moment
Flow rate flow in time interval by indicating traffic flow rate in timetExpressed as:
in the calculation of the real-time road entrance rate, the entrance rate indicates the entrance capacity of the current road section, and the higher the entrance rate is, the higher the traffic index of the current road is, the smoother the road condition is. Conversely, the lower the value, the lower the traffic index of the current road is, and the road condition tends to be congested. According to the method in the step A1, the traffic flow at the time when T ═ {1, 2, 3. } passes through the current road section and the upstream road section simultaneously is calculated and recorded as
The flow of the flow passing through at the same time in the time periodinExpressed as:
the driving rate pinComprises the following steps:
wherein, flowinIndicating the flow of traffic entering the upstream and the current road simultaneously within a time periodtRepresenting the total flow during the current road segment.
In the calculation of the real-time driving rate of the road section, the driving rate shows the output permission of the current road section, and the higher the value of the driving rate is, the higher the traffic index of the current road is, and the smoother the road condition is. On the contrary, the lower the value is, the lower the traffic index of the current road is, and the road condition quality tends to be congested. Calculating the traffic flow number which passes through the current road and the corresponding downstream simultaneously in the time T ═ {1, 2, 3
Then the flow rate passing through simultaneously in the time period is:
the output rate is:
in calculating the real-time traffic change rate of the road, the traffic change rate reflects the fluctuation amplitude and fluctuation trend of the traffic, and the traffic of the road section at the last moment is recorded:
the rate of change of flow is then:
s102, generating a change trend corresponding to the change rate, the entrance rate and the exit rate based on the parameter set corresponding to the traffic flow in different time periods;
in one possible implementation, for example, as shown in fig. 4, based on the traffic accident disturbance occurring during late peak period of the new high-speed beijing segment, lasting for many hours, large-scale traffic jam of a large number of vehicles is caused spatially, and then the traffic capacity evaluation indexes of the non-disturbance period and the disturbance period are compared respectively to make graphs of the entry rate and the entry rate respectively. As shown in fig. 4, the discontinuous curve shows the change of the index value corresponding to the change of the non-disturbance time period along with the time T, and the non-discontinuous line shows the change of the parameter value of the disturbance time period, and it is found that, at the same time T, the parameter value of the disturbance time period is obviously lower than the value of the non-disturbance time period, and also reflects that the higher the entrance rate and the exit rate when disturbance does not occur, the stronger the traffic capacity, the lower the parameter value when disturbance occurs, the weaker the traffic capacity of the road, and the change trend of the curve is consistent with the actual phenomenon.
And S103, judging whether traffic disturbance occurs or not according to the change trend.
In the embodiment of the present application, based on the parameters calculated in step S101, the parameter value of the current travel section is calculated and compared with the previous parameters to calculate the difference. For example, as shown in fig. 3, when a disturbance occurs, due to congestion and queuing, the distance between vehicles is far lower than the safe distance during normal driving, and for a road section, more vehicles are blocked on the current road section, and the flow of the current road section is lowtThe value begins to increase, the flow rate of change value increases according to the above formula, and the vehicle queue of the current road section occupies the space of the road section, which causes the available space of the road section from the upstream to the current road section to decrease, and the driving flow at this momentinWill begin to decrease, and correspondingly, the entry rate pinReduced, exit flowoutDriven-in flowinInfluence of, the output rate poutDecrease ptCorrespondingly increasing, when disturbance is finished, because the disturbance is cleared, the number of available lanes is increased, the speed of the vehicle is accelerated, the number of queued vehicles is gradually reduced, and the current flow is causedtHas a decreasing trend until the normal flow is recoveredin、flowoutRelative increase, pin、poutIncrease accordingly, ptAnd correspondingly decreases.
The application defines a variation threshold K, if p, for large traffic road sectionsin，poutThe difference value is reduced and is less than the preset K, ptThere is a growing trend, if the corresponding position has been disturbed, the disturbance is continuous, otherwise, the disturbance is provedThe road section has disturbance and is in a starting state of the disturbance. If p isin，poutHas a growing trend and is larger than a preset change threshold value, ptThere is a decreasing trend, and if the position has been disturbed, the corresponding position is in the end state of the disturbance.
For the road section with not particularly large flow, the queuing phenomenon is not obvious enough, when the disturbance occurs at the entrance of the road, the vehicle is difficult to drive in, the influence on the vehicle is obvious, the influence on the driving out is not obvious enough, and at the moment, when p isin，ptWhen there is a decreasing tendency smaller than the threshold value and poutAnd if the current road section is not disturbed, the road section is considered to be in the disturbance starting stage, if the current road section is not disturbed, the road section is considered to be in the diffusion stage, otherwise, the road section is considered to be in the disturbance ending stage if the current road section is disturbed.
When disturbance occurs at the exit of the road, it is relatively difficult for upstream vehicles to leave the current road section, the influence on the driving rate of the vehicles is obvious, the influence on the driving of the vehicles is not obvious enough, the traffic flow is slightly queued, the current section flow is increased, and at the moment, when p isoutThe tendency to decrease is less than the threshold value, ptWhen there is a tendency to increase and pinAnd if the current road section is not disturbed, the road section is considered to be in the disturbance starting stage, if the current road section is disturbed, the road section is considered to be in the diffusion stage, otherwise, the road section is considered to be in the disturbance ending stage if the current road section is disturbed.
For example, as shown in fig. 5, when detecting whether traffic is disturbed, first, the traffic flow, the entry rate, and the entry rate in N minutes are calculated, then the traffic flow, the entry rate, and the entry rate in the previous N minutes are calculated, and finally, whether the traffic disturbance is in the traffic disturbance starting state is determined, when the traffic disturbance starting state is determined, whether there is a trend of increase is determined, when the traffic flow, the entry rate, and the entry rate in the current N minutes are calculated, and are greater than the traffic flow, the entry rate, and the entry rate in the previous N minutes, and the entry rate, and the entry. And judging whether the traffic disturbance has a decreasing trend or not when the traffic disturbance is not in the starting state, wherein the disturbance starts when the flow in the current N minutes is calculated and the entrance rate and the exit rate are smaller than the flow, the entrance rate and the exit rate in the previous N minutes, and otherwise, the disturbance does not start.
In the embodiment of the application, a user terminal firstly calculates and generates a parameter set corresponding to traffic flow of a road in different time periods according to a road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate, then generates a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow of different time periods, and finally judges whether traffic disturbance occurs according to the change trend. The invention starts from the phenomenon and essence that various factors influence the traffic network, can more comprehensively sense the disease condition of the road network, covers the factors of road canalization, traffic signals, emergencies, road maintenance, traffic weather and the like, and establishes discovery, tracking, influence evaluation and statistical analysis on traffic disturbance, thereby realizing the grasp of the conventional and unconventional disease condition of the road network and further guiding the targeted treatment.
Please refer to fig. 7, which is a schematic flow chart illustrating a traffic disturbance detection and analysis according to an embodiment of the present disclosure. The embodiment is exemplified by applying the detection analysis of the traffic disturbance to the user terminal. The detection analysis of the traffic disturbance may comprise the steps of:
s201, calculating and generating a parameter set corresponding to traffic flow of the road in different time periods according to a road structure, wherein the parameter set comprises a change rate, an entrance rate and an exit rate;
s202, generating a change trend corresponding to the change rate, the entrance rate and the exit rate based on the parameter set corresponding to the traffic flow in different time periods;
s203, acquiring the vehicle passing number in the first time period;
s204, calculating based on the vehicle passing number in the first time period to generate a first parameter set, wherein the first parameter set comprises a first change rate, a first entrance rate and a first exit rate;
s205, acquiring the vehicle passing number of a second time period, wherein the final time of the second time period is after the final time of the first time period for the current time;
s206, calculating based on the vehicle passing number in the second time period to generate a second parameter set, wherein the second parameter set comprises a second change rate, a second entrance rate and a second entrance rate;
s207, when each parameter value in the second parameter set is smaller than each corresponding parameter value in the first parameter set, traffic disturbance starts;
s208, when the traffic disturbance starts, according to the influence range of the traffic disturbance and the influenced traffic flow, carrying out disturbance degree grade evaluation on the traffic disturbance to generate a grade value corresponding to the traffic disturbance;
in the embodiment of the present application, as shown in fig. 6, a description of a traffic disturbance influence range describes a topological relation graph of the disturbance influence range, and introduces a road network topological structure influenced in a disturbance duration. FIG. 6 is a road network topology diagram influenced by traffic disturbance occurring in Beijing New high speed Beijing segment. As seen in the figure, the tendency of the disturbance is spreading upstream, causing upstream traffic congestion.
Calculating the disturbance influence time according to the start time t for the road in the disturbance statestartAnd an end time tendThe duration of the perturbation can be found to be:
tcost＝tstart-tend(formula 8)
A6. And (4) evaluating the disturbance severity, namely grading the disturbance severity according to the influence range of the disturbance and the influenced traffic flow, and facilitating a traffic management department to carry out traffic processing according to the priority. The invention makes the downstream flow breaking phenomenon caused by disturbance namely: flow (W)out0, simultaneous take-off rate poutThe first-order disturbance is defined as 0, the catastrophic influence is generated on the road network when the flow is cut off, and the queue length is extremely long in propagation. Will affect the range distaffect>L kilometer and influence flow greater than flowaffect>The disturbance of N is defined as two levels, the influence range is very large at the moment, and the influence on the traffic flow is very much.
Wherein the influence range is as follows:
Diindicating the length of each road affected.
Will distaffect>L or flowaffect>The definition of N is the third level, and the other definitions are the fourth level, and obviously, the influence of the disturbance of the fourth level on the traffic flow is relatively weak, and the queuing length caused by congestion is not very long.
S209, establishing a description mechanism for analysis according to the traffic disturbance and the grade value corresponding to the traffic disturbance.
In the embodiment of the application, a multi-dimensional full-life-cycle description mechanism is established for each disturbance on the basis of the discovery, tracking and influence range and severity evaluation of the disturbance. On cities and intercity road networks, traffic disturbances of different types and different degrees can occur every day, and by carrying out statistical analysis on the disturbance entities of long-term space dimensions, the space-time law of disturbance occurrence and development can be further summarized, so that the method has important significance for preventing and avoiding the occurrence of disturbance in traffic control, reducing the influence of disturbance and the like.
Based on statistical analysis of the time dimension, based on historical data mining, it was found that disturbances occur more frequently during peak hours, both early and late, which is consistent with the actual situation. When the peak is in the morning and at night, the traffic flow of the road network is obviously increased, the traffic demand of a busy road is greater than the bearing capacity of the road network, and the disturbance is more easily caused, so that the congestion phenomenon is caused.
Based on the statistical analysis of the spatial dimension, the disturbance of the trumpet-shaped road, the speed-limiting area and the sharp-turning road section is found out easily. In the actual traffic phenomenon, the horn-shaped route induces disturbance due to lane change; in the sharp turning road section, the road condition is relatively complex, and the vehicle speed is easy to be out of control, so that accident-type disturbance occurs; the speed of the speed-limiting area is suddenly reduced, so that the driving-out capacity of the road is affected, and congestion is very easy to occur.
Type analysis of the disturbance: for the road section with frequent disturbance, the road section is defined as the regular disturbance, such as a tidal lane, a speed-limiting area, a sharp turning road section, a trumpet-shaped road and the like; other occasional disturbances such as vehicle rear-end collisions and the like are defined as irregular disturbances. And the statistical analysis of the disturbance is carried out, the conventional disturbance is excavated, and the method has a strong reference value for improving the traffic planning.
In the embodiment of the application, a user terminal firstly calculates and generates a parameter set corresponding to traffic flow of a road in different time periods according to a road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate, then generates a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow of different time periods, and finally judges whether traffic disturbance occurs according to the change trend. The invention starts from the phenomenon and essence that various factors influence the traffic network, can more comprehensively sense the disease condition of the road network, covers the factors of road canalization, traffic signals, emergencies, road maintenance, traffic weather and the like, and establishes discovery, tracking, influence evaluation and statistical analysis on traffic disturbance, thereby realizing the grasp of the conventional and unconventional disease condition of the road network and further guiding the targeted treatment.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details which are not disclosed in the embodiments of the apparatus of the present invention, reference is made to the embodiments of the method of the present invention.
Fig. 8 is a schematic structural diagram of a traffic disturbance detection and analysis apparatus according to an exemplary embodiment of the present invention. The traffic disturbance detection and analysis device can be realized by software, hardware or a combination of the two to form all or part of the terminal. The device 1 comprises a set generation module 10, a change rate generation module 20 and a disturbance judgment module 30.
The set generating module 10 is configured to calculate and generate a parameter set corresponding to traffic flow of the road in different time periods according to a road structure, where the parameter set includes a change rate, an entrance rate, and an exit rate;
the change rate generation module 20 is configured to generate a change trend corresponding to the change rate, the entrance rate and the exit rate based on the parameter set corresponding to the traffic flow in different time periods;
and the disturbance judging module 30 is configured to judge whether traffic disturbance occurs according to the change trend.
Optionally, as shown in fig. 9, the apparatus 1 further includes:
the grade value generation module 40 is configured to, when traffic disturbance starts, perform disturbance degree grade evaluation on the traffic disturbance according to an influence range of the traffic disturbance and an influenced traffic flow, and generate a grade value corresponding to the traffic disturbance;
and the analysis module 50 is configured to establish a description mechanism for analysis according to the traffic disturbance and the grade value corresponding to the traffic disturbance.
Optionally, as shown in fig. 10, the disturbance determining module 30 includes:
a first number obtaining unit 310 for obtaining the number of vehicles passing in a first time period;
a first set generating unit 320, configured to perform calculation based on the vehicle passing number in the first time period, and generate a first parameter set, where the first parameter set includes a first change rate, a first entrance rate, and a first entrance rate;
a second quantity obtaining unit 330 for obtaining a vehicle passing quantity of a second time period, wherein the second time period final time is after the first time period final time for the current time;
a second set generating unit 340, configured to perform calculation based on the number of vehicle passages in the second time period, and generate a second parameter set, where the second parameter set includes a second rate of change, a second entrance rate, and a second entrance rate;
a parameter value comparing unit 350, configured to start traffic disturbance when each parameter value in the second parameter set is smaller than each corresponding parameter value in the first parameter set.
It should be noted that, when the detection and analysis device for traffic disturbance provided in the foregoing embodiment executes the detection and analysis method for traffic disturbance, the division of the above functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the above described functions. In addition, the detection and analysis device for traffic disturbance and the detection and analysis method for traffic disturbance provided by the above embodiments belong to the same concept, and the detailed implementation process is shown in the method embodiments, which is not described herein again.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the embodiment of the application, a user terminal firstly calculates and generates a parameter set corresponding to traffic flow of a road in different time periods according to a road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate, then generates a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow of different time periods, and finally judges whether traffic disturbance occurs according to the change trend. The invention starts from the phenomenon and essence that various factors influence the traffic network, can more comprehensively sense the disease condition of the road network, covers the factors of road canalization, traffic signals, emergencies, road maintenance, traffic weather and the like, and establishes discovery, tracking, influence evaluation and statistical analysis on traffic disturbance, thereby realizing the grasp of the conventional and unconventional disease condition of the road network and further guiding the targeted treatment.
The present invention also provides a computer readable medium, on which program instructions are stored, and the program instructions, when executed by a processor, implement the method for detecting and analyzing traffic disturbance provided by the above-mentioned method embodiments.
The present invention also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method for detecting and analyzing traffic disturbances according to the various method embodiments described above.
Please refer to fig. 11, which provides a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in fig. 11, the terminal 1000 can include: at least one processor 1001, at least one network interface 1004, a user interface 1003, memory 1005, at least one communication bus 1002.
Wherein a communication bus 1002 is used to enable connective communication between these components.
The user interface 1003 may include a Display screen (Display) and a Camera (Camera), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
The Memory 1005 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 1005 includes a non-transitory computer-readable medium. The memory 1005 may be used to store an instruction, a program, code, a set of codes, or a set of instructions. The memory 1005 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, and the like; the storage data area may store data and the like referred to in the above respective method embodiments. The memory 1005 may optionally be at least one memory device located remotely from the processor 1001. As shown in fig. 11, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a traffic disturbance detection analysis application program.
In the terminal 1000 shown in fig. 11, the user interface 1003 is mainly used as an interface for providing input for a user, and acquiring data input by the user; and the processor 1001 may be configured to invoke the detection analysis application of the traffic disturbance stored in the memory 1005 and specifically perform the following operations:
calculating and generating a parameter set corresponding to the traffic flow of the road in different time periods according to the road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate;
generating a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow in different time periods;
and judging whether traffic disturbance occurs or not according to the change trend.
In one embodiment, when the processor 1001 determines whether a traffic disturbance occurs according to the change trend, the following operations are specifically performed:
acquiring the vehicle passing number of a first time period;
calculating based on the vehicle passing number of the first time period, and generating a first parameter set, wherein the first parameter set comprises a first change rate, a first entrance rate and a first entrance rate;
acquiring the vehicle passing number of a second time period, wherein the final time of the second time period is later than the final time of the first time period for the current time;
calculating based on the vehicle passing number in the second time period to generate a second parameter set, wherein the second parameter set comprises a second change rate, a second entrance rate and a second entrance rate;
and when each parameter value in the second parameter set is smaller than each corresponding parameter value in the first parameter set, starting traffic disturbance.
In one embodiment, the processor 1001, after performing the determining whether the traffic disturbance occurs according to the change trend, further performs the following operations:
when the traffic disturbance starts, according to the influence range of the traffic disturbance and the influenced traffic flow, carrying out disturbance degree grade evaluation on the traffic disturbance, and generating a grade value corresponding to the traffic disturbance.
In one embodiment, the processor 1001 further performs the following operations after the generating of the level value corresponding to the traffic disturbance:
and establishing a description mechanism for analysis according to the traffic disturbance and the grade value corresponding to the traffic disturbance.
In the embodiment of the application, a user terminal firstly calculates and generates a parameter set corresponding to traffic flow of a road in different time periods according to a road structure, wherein the parameter set comprises a change rate, an entrance rate and an entrance rate, then generates a change trend corresponding to the change rate, the entrance rate and the entrance rate based on the parameter set corresponding to the traffic flow of different time periods, and finally judges whether traffic disturbance occurs according to the change trend. The invention starts from the phenomenon and essence that various factors influence the traffic network, can more comprehensively sense the disease condition of the road network, covers the factors of road canalization, traffic signals, emergencies, road maintenance, traffic weather and the like, and establishes discovery, tracking, influence evaluation and statistical analysis on traffic disturbance, thereby realizing the grasp of the conventional and unconventional disease condition of the road network and further guiding the targeted treatment.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory or a random access memory.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.
Claims (9)
1. A method for detecting and analyzing traffic disturbances, the method comprising:
calculating and generating a parameter set corresponding to the traffic flow of the road in different time periods according to the road structure, wherein the parameter set comprises the change rate, the entrance rate and the exit rate of the traffic flow;
generating a change trend corresponding to the change rate, the entrance rate and the exit rate of the traffic flow based on the parameter set corresponding to the traffic flow in different time periods;
judging whether traffic disturbance occurs or not according to the change trend;
wherein, the judging whether the traffic disturbance appears according to the change trend comprises:
acquiring the vehicle passing number of a first time period;
calculating based on the vehicle passing number in the first time period, and generating a first parameter set, wherein the first parameter set comprises a first change rate of the traffic flow, a first entrance rate and a first exit rate;
acquiring the vehicle passing number of a second time period, wherein the final time of the second time period is later than the final time of the first time period for the current time;
calculating based on the vehicle passing number in the second time period to generate a second parameter set, wherein the second parameter set comprises a second change rate of the vehicle flow, a second entrance rate and a second entrance rate;
when each parameter value in the second parameter set is smaller than each corresponding parameter value in the first parameter set, traffic disturbance starts;
the method for calculating the entrance rate of the traffic flow comprises the following steps:
calculating the time traffic flow of the current road section and the upstream road section simultaneously in the time T ═ 1, 2, 3
The flow of the flow passing through at the same time in the time periodinExpressed as:
the calculation mode of the driving rate of the traffic flow is as follows:
calculating the traffic flow number of vehicles passing through the current road and the corresponding downstream simultaneously in the time T ═ {1, 2, 3. }, and recording the traffic flow as
Then the flow rate passing through simultaneously in the time period is:
the calculation mode of the change rate of the traffic flow is as follows:
wherein, the flow of the road section at the last moment is as follows:
wherein i is a road section, T is a time section, and T is a moment.
2. The method according to claim 1, wherein after determining whether the traffic disturbance occurs according to the trend of change, the method further comprises:
when the traffic disturbance starts, according to the influence range of the traffic disturbance and the influenced traffic flow, carrying out disturbance degree grade evaluation on the traffic disturbance to generate a grade value corresponding to the traffic disturbance;
wherein, the performing disturbance degree grade evaluation on the traffic disturbance to generate a grade value corresponding to the traffic disturbance includes:
when the vehicle with traffic disturbance exits the flowout0, simultaneous take-off rate poutWhen the value is 0, the first-order disturbance is defined; alternatively, the first and second electrodes may be,
when the influence range dist of the occurrence of traffic disturbanceaffect>L kilometers and affects flowaffect>The disturbance of N is defined as a secondary disturbance; alternatively, the first and second electrodes may be,
when the influence range dist of the occurrence of traffic disturbanceaffect>L or influence flowaffect>N is defined as three-level disturbance; alternatively, the first and second electrodes may be,
the rest condition is four-stage disturbance; wherein the content of the first and second substances,
and L is a preset influence range value, and N is a preset influence flow value.
3. The method according to claim 2, wherein after generating the level value corresponding to the traffic disturbance, the method further comprises:
and establishing a description mechanism for analysis according to the traffic disturbance and the grade value corresponding to the traffic disturbance.
4. The method according to claim 3, wherein the establishing a description mechanism for analysis according to the traffic disturbance and the level value corresponding to the traffic disturbance comprises:
and carrying out statistical analysis based on time dimension through the traffic disturbance and the grade value corresponding to the traffic disturbance.
5. The method according to claim 3, wherein the establishing a description mechanism for analysis according to the traffic disturbance and the level value corresponding to the traffic disturbance comprises:
and carrying out statistical analysis based on space dimensionality through the traffic disturbance and the grade value corresponding to the traffic disturbance.
6. The method according to claim 3, wherein the establishing a description mechanism for analysis according to the traffic disturbance and the level value corresponding to the traffic disturbance comprises:
and analyzing based on the traffic disturbance type according to the traffic disturbance and the grade value corresponding to the traffic disturbance.
7. A traffic disturbance detection and analysis device, characterized in that the device comprises:
the set generation module is used for calculating and generating a parameter set corresponding to the traffic flow of the road in different time periods according to the road structure, wherein the parameter set comprises the change rate, the entrance rate and the exit rate of the traffic flow;
the change rate generation module is used for generating change rates of the traffic flow, the entrance rate and change trends corresponding to the entrance rate based on the parameter sets corresponding to the traffic flow in different time periods;
the disturbance judgment module is used for judging whether traffic disturbance occurs or not according to the change trend;
the disturbance judgment module is specifically configured to:
acquiring the vehicle passing number of a first time period;
calculating based on the vehicle passing number in the first time period, and generating a first parameter set, wherein the first parameter set comprises a first change rate of the traffic flow, a first entrance rate and a first exit rate;
acquiring the vehicle passing number of a second time period, wherein the final time of the second time period is later than the final time of the first time period for the current time;
calculating based on the vehicle passing number in the second time period to generate a second parameter set, wherein the second parameter set comprises a second change rate of the vehicle flow, a second entrance rate and a second entrance rate;
when each parameter value in the second parameter set is smaller than each corresponding parameter value in the first parameter set, traffic disturbance starts;
the method for calculating the entrance rate of the traffic flow comprises the following steps:
calculating the time traffic flow of the current road section and the upstream road section simultaneously in the time T ═ 1, 2, 3
The flow of the flow passing through at the same time in the time periodinExpressed as:
the calculation mode of the driving rate of the traffic flow is as follows:
wherein, T & lt1, 2, 3 & gt is calculated to simultaneously pass through the current road and the corresponding downstream in timeVehicle flow rate, flow rate record
Then the flow rate passing through simultaneously in the time period is:
the calculation mode of the change rate of the traffic flow is as follows:
wherein, the flow of the road section at the last moment is as follows:
wherein i is a road section, T is a time section, and T is a moment.
8. A computer storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to perform the method steps according to any of claims 1 to 6.
9. A terminal, comprising: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the method steps of any of claims 1 to 6.
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