CN115148020B - Monitoring system and method based on traffic flow in unit time of expressway - Google Patents
Monitoring system and method based on traffic flow in unit time of expressway Download PDFInfo
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- G08G1/00—Traffic control systems for road vehicles
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- G08G1/00—Traffic control systems for road vehicles
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- G—PHYSICS
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- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
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Abstract
The invention relates to a monitoring system and a method based on traffic flow in unit time of a highway, which is technically characterized in that: the system comprises a monitoring center and section traffic flow information acquisition equipment arranged on the expressway, wherein the outlet section traffic flow information acquisition equipment is arranged at each outlet position of the expressway and used for acquiring traffic flow information of the outlet position; the road section traffic flow information acquisition equipment is arranged at a position between two outlets of the expressway and is used for acquiring traffic flow information on the road. The section traffic flow information acquisition equipment transmits the acquired traffic flow information and related information to the monitoring center through the communication network, and the monitoring center stores, analyzes and displays the acquired traffic flow information and related information. The invention has reasonable design, can completely provide road section level traffic flow data, can accurately analyze the traffic load of each road section in unit time, and provides data support for traffic management and highway maintenance.
Description
Technical Field
The invention belongs to the technical field of traffic monitoring, relates to expressway flow monitoring, and in particular relates to a system and a method for monitoring traffic flow in unit time based on an expressway.
Background
In order to facilitate traffic management, road condition monitoring and intelligent road construction, traffic authorities need to accurately grasp traffic flow conditions of highways. At present, the monitoring method for the traffic flow information of the expressway is mainly realized by a section information acquisition method, and mainly comprises the following three schemes:
(1) Based on coil technology: the method of burying the pavement is used, a metal annular induction coil is arranged under each lane, and the change of inductance caused by the iron material of the vehicle body when the vehicle passes through the coil area is used for monitoring the traffic flow of the section.
(2) Based on video technology: the method is characterized in that a portal or a beam is used for installing, a video camera is positively installed above each lane, a vehicle driving video passing through the lane is shot, and the traffic flow of the section is monitored in a video intelligent analysis mode.
(3) Based on microwave technology: the mode of using the pole setting to install is with microwave radar side direction in outside lane limit, and the electromagnetic wave that sends out through monitoring radar antenna is reflected by passing through the vehicle, monitors section traffic flow.
All three methods have a common problem that the traffic flow passing through the monitoring section can be obtained only, and the traffic flow condition of the whole expressway can not be accurately integrated and analyzed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a monitoring system and a monitoring method based on the traffic flow in the unit time of the expressway, which are reasonable in design and can rapidly and accurately analyze the traffic flow of the whole expressway.
The invention solves the technical problems in the prior art by adopting the following technical scheme:
the utility model provides a monitoring system based on traffic flow in highway unit time, includes the control center and installs the section traffic flow information acquisition equipment on the highway, section traffic flow information acquisition equipment includes arterial road section traffic flow information acquisition equipment and export section traffic flow information acquisition equipment, export section traffic flow information acquisition equipment installs at every exit position of highway for gather the traffic flow information of exit position, arterial road section traffic flow information acquisition equipment installs the position between two exports of highway for gather the traffic flow information on the arterial road, section traffic flow information acquisition equipment passes through communication network with the traffic flow information and the relevant information that gathers and sends to the control center, is stored, analysis and shows by the control center.
Further, the section traffic flow information acquisition equipment adopts millimeter wave radar to acquire traffic flow information.
Further, the traffic flow information collected by the section traffic flow information collection device includes: medium and small bus traffic flow, small truck traffic flow, medium truck traffic flow, large truck traffic flow, extra large truck traffic flow, container truck traffic flow and motorcycle traffic flow through the section; the related information comprises a section traffic flow information acquisition equipment identity identification code, a traffic data processing period and a time sequence number.
Further, the monitoring center comprises a data acquisition and storage server, a data analysis and display server, a time sequence database, a monitoring terminal and a firewall which are connected together through a computer network;
the data acquisition and storage server is connected with the section traffic flow information acquisition equipment through a firewall, receives traffic flow information and related information sent by the section traffic flow information acquisition equipment, establishes a section traffic flow information acquisition equipment information table in a time sequence database, establishes a time main key by using a traffic data processing period and a time sequence number according to a sub-table rule of an equipment identity identification code, an equipment type, an equipment pile number and an uplink and downlink mark, and respectively inserts the received information into a corresponding equipment information table in the time sequence database;
the time sequence database is used for storing time sequence data processed by the data acquisition and storage server and is used for analysis by the data analysis and display server;
the data analysis and display server receives an analysis request of the monitoring terminal, finds out the section traffic flow information acquisition equipment information of the main road, which belongs to the start-stop pile number, and all the section traffic flow information acquisition equipment information of the exit in the road section in a time sequence database according to the start-stop pile number and the start-stop time of the road section in the analysis request, sums the traffic flow, which belongs to the start-stop pile number, according to the section traffic flow information acquisition equipment information table, obtains the traffic flow in unit time of the road section, formats the result and returns the result to the monitoring terminal;
the monitoring terminal is connected with the data analysis and display server, selects the start-stop pile number and the start-stop time of the road section to be counted, sends an analysis request to the data analysis and display server, and displays the traffic flow obtained by the data analysis and display server.
Further, the traffic flows calculated by the data analysis and display server include medium and small bus traffic flows, large bus traffic flows, small truck traffic flows, medium truck traffic flows, large truck traffic flows, oversized truck traffic flows, container truck traffic flows and motorcycle traffic flows.
Further, the monitoring terminal sends an analysis request to the data analysis and display server through the WEB browser, and the traffic flow is displayed through the WEB browser.
A monitoring method of a monitoring system based on traffic flow in a unit time of a highway comprises the following steps:
step 1, a main road section traffic flow information acquisition device and an exit section traffic flow information acquisition device which are arranged on a highway acquire traffic flow information of a point where the traffic flow information is located in real time, and periodically transmit the acquired traffic flow information and related information to a monitoring center;
step 2, after the data acquisition and storage server of the monitoring center receives traffic flow information and related information periodically sent by the section traffic flow information acquisition equipment, time sequence data comprising the section traffic flow information are stored in a time sequence database;
step 3, the monitoring terminal sends an analysis request to the data analysis and display server, wherein the analysis request comprises a road section start-stop pile number and start-stop time which need to be counted;
step 4, the data analysis and display server reads the traffic flow information of the road section traffic flow information acquisition equipment included by the start-stop pile number and the traffic flow information of all the exit section traffic flow information acquisition equipment in the road section from the time sequence database according to the road section start-stop pile number and the start-stop time in the analysis request, calculates according to the start-stop time, and sends the calculation result to the monitoring terminal;
and 5, the monitoring terminal displays the traffic flow in unit time according to the calculation result of the data analysis and display server.
Further, the traffic flow information sent by the traffic flow information acquisition device to the monitoring center in the step 1 includes: medium and small bus traffic flow, small truck traffic flow, medium truck traffic flow, large truck traffic flow, extra large truck traffic flow, container truck traffic flow and motorcycle traffic flow; the related information comprises a section traffic flow information acquisition equipment identity identification code, a traffic data processing period and a time sequence number.
Further, the specific implementation method of the step 2 is as follows: after receiving traffic flow information and related information periodically sent by the section traffic flow information acquisition equipment, the data acquisition and storage server establishes a section traffic flow information acquisition equipment information table in a time sequence database, establishes a time master key by using a traffic data processing period and a time sequence number according to the sub-table rule of equipment identity identification codes, equipment types, equipment stake numbers and uplink and downlink marks, and respectively inserts the received information into a corresponding equipment information table in the time sequence database to complete the time sequence data storage function of the traffic flow information.
Further, the specific implementation method of the step 4 is as follows: the data analysis and display server finds out the main road section traffic flow information acquisition equipment information to which the start-stop pile number belongs and all the exits in the road section through the section traffic flow information acquisition equipment information table in the time sequence database according to the road section start-stop pile number in the analysis requestTraffic flow information acquisition equipment information of the section of the opening; determining the table name of a time sequence database through the section traffic flow information acquisition equipment information, filtering the start-stop time according to the start-stop time, summing the traffic flow of each acquisition equipment to obtain the last main road section traffic flow Rn and each outlet section traffic flow Em-En, and calculating according to the following formula to obtain the traffic flow of the road section in unit time:
the method comprises the steps of carrying out a first treatment on the surface of the And finally, formatting the calculation result and returning the calculation result to the monitoring terminal.
The invention has the advantages and positive effects that:
1. the system and the method are based on the road section traffic flow information acquisition equipment and the exit section traffic flow information acquisition equipment which are arranged on the expressway, respectively acquire the road traffic flow and the exit traffic flow and periodically send the road traffic flow and the exit traffic flow to the monitoring center, and the monitoring center stores, analyzes and displays the data, integrates the section data, realizes the accurate acquisition and analysis processing functions of the road section level traffic flow of the expressway, can completely provide the road section level traffic flow data, can accurately analyze the traffic load of each road section in unit time, and provides data support for traffic management, maintenance and operation and maintenance.
2. The millimeter wave radar is adopted as the section traffic flow information acquisition equipment to acquire traffic flow information, so that the vehicle type and the flow information can be accurately acquired, and the analysis and statistics functions of the flows of different vehicle types are realized.
3. The monitoring system has reasonable design, simple structure and convenient installation, use and maintenance, and the algorithm adopted by the monitoring method is simple, practical and easy to realize, and can be widely used for monitoring and managing the traffic flow of the expressway.
Drawings
FIG. 1 is a schematic diagram of a monitoring system connection of the present invention;
FIG. 2 is a schematic diagram of the installation point and traffic flow monitoring of the cross-section traffic flow information acquisition device of the present invention;
fig. 3 is a process flow diagram of the monitoring method of the present invention.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
The utility model provides a monitoring system based on traffic flow in highway unit time, as shown in fig. 1, includes the monitoring center and installs the section traffic flow information acquisition equipment on the highway, section traffic flow information acquisition equipment includes trunk section traffic flow information acquisition equipment R1~ Rn and export section traffic flow information acquisition equipment E1~ En, trunk section traffic flow information acquisition equipment R1~ Rn and export section traffic flow information acquisition equipment E1~ En are all connected with the monitoring center through communication network. The traffic flow information acquisition equipment E1-En of the outlet section is arranged at each outlet position of the expressway and used for acquiring traffic flow information of the outlet position; the road section traffic flow information acquisition devices R1-Rn are arranged at the middle positions of two outlets of the expressway and are used for acquiring traffic flow information on the road. The section traffic flow information acquisition equipment transmits the acquired traffic flow information and related information to the monitoring center through the communication network, and the monitoring center stores, analyzes and displays the acquired traffic flow information and related information. Under the practical application environment, the section traffic flow information acquisition equipment can interact data with the monitoring center through a wired communication network, a wireless communication network or a wired and wireless communication combination mode, so that the monitoring function of traffic flow in the unit time of the expressway is realized.
In the embodiment, the traffic flow information acquisition devices R1-Rn of the sections of the arterial roads and the traffic flow information acquisition devices E1-En of the sections of the exits are all used for acquiring traffic flow information by adopting millimeter wave radars. Because millimeter wave radar is generally integrated with the camera for use, therefore, section traffic flow information acquisition equipment can realize vehicle type recognition and flow judgment through the mounting point. Each section traffic flow information acquisition device can acquire the following traffic flow information: medium and small bus traffic flow, small truck traffic flow, medium and large truck traffic flow, oversized truck traffic flow, container truck traffic flow, motorcycle traffic flow, and the like.
The section traffic flow information acquisition equipment can set a traffic data processing period according to the monitoring requirement of the monitoring center, and the acquired traffic flow information and related information are sent to the monitoring center in the set traffic data processing period. The related information sent by the section traffic flow information acquisition equipment comprises an identification code of the section traffic flow information acquisition equipment, a traffic data processing period (unit: minutes) and a time sequence number. Since 24h is 1440 minutes, the integer number between time numbers 1 to (1440/recording period length) corresponds to the traffic data processing period between 1 st to (1440/recording period length) in 24 h.
The monitoring center comprises a data acquisition and storage server, a data analysis and display server, a time sequence database, a monitoring terminal and a firewall which are connected together through a computer network.
The data acquisition and storage server is connected with all section traffic flow information acquisition devices through a firewall, and establishes a section traffic flow information acquisition device information table in a time sequence database, wherein the section traffic flow information acquisition device information table stores device identity identification codes, device types (R/E), device stake numbers and uplink and downlink marks. After receiving traffic flow information and related information sent by the section traffic flow information acquisition equipment, the data acquisition and storage server establishes a time master key by using a traffic data processing period and a time sequence number according to a rule of a device identity identification code, a device type, a device stake number and a sub-table of an uplink and downlink mark, and respectively inserts the received information into a corresponding device information table in a time sequence database to complete a time sequence data storage function of the traffic flow information.
The time sequence database is used for storing time sequence data processed by the data acquisition and storage server, and the time sequence data of the section traffic flow information is stored according to the table division rules of the equipment identity identification code, the equipment type, the equipment pile number and the uplink and downlink marks. The time sequence database is used for data analysis and display server analysis.
The data analysis and display server receives an analysis request of the monitoring terminal, wherein the analysis request is used for counting traffic flow of a road section in unit time, and the analysis request comprises a road section start-stop pile number and start-stop time information. The data analysis and display server receives the road section traffic flow information acquisition equipment information of the road section and the exit section traffic flow information acquisition equipment information in the road section, the road section traffic flow information acquisition equipment information of which the start-stop pile number belongs is found out by the monitoring terminal according to the start-stop pile number of the road section through a section traffic flow information acquisition equipment information table in the time sequence database, the table name of the time sequence database is determined through the equipment information, then the start-stop time filtration is carried out, and the traffic flows of all acquisition equipment are summed up to obtain the traffic flow in unit time of the road section; and finally formatting the result and returning the result to the monitoring terminal.
The monitoring terminal is connected with the data analysis and display server, and one or more monitoring terminals can be installed according to the requirement. And a monitoring person opens a monitoring system page through a WEB browser of the monitoring terminal, selects a road section start-stop pile number and start-stop time which need to be counted, sends an analysis request to a data analysis and display server, and displays traffic flow obtained by the data analysis and display server through the WEB browser.
The working principle of the monitoring system is described below by using the installation point of the section traffic flow information acquisition equipment shown in fig. 2. The road section comprises two main road section traffic flow information acquisition devices R1 and R2 and two outlet section traffic flow information acquisition devices E1 and E2, wherein the two main road section traffic flow information acquisition devices R1 and R2 are respectively arranged near the middle position of a first inlet to a second outlet and between the second inlet and a road section terminal, and the two outlet section traffic flow information acquisition devices E1 and E2 are respectively arranged near the starting point of a first outlet ramp and the starting point of a second outlet ramp. It can be seen that the selected road section necessarily comprises a main road section traffic flow information acquisition device near one end point and a plurality of exit section traffic flow information acquisition devices.
As can be seen from fig. 2, the overall traffic flow per unit time on this road section is n1+n2+n3+n4+n5+n6. Wherein n1 is the number of vehicles exiting from the road section starting point trunk via the first exit, n2 is the number of vehicles exiting from the road section starting point trunk via the second exit, n3 is the number of vehicles exiting from the road section starting point trunk via the road section ending point trunk, n4 is the number of vehicles exiting from the first entrance via the second exit, n5 is the number of vehicles exiting from the first entrance via the road section ending point trunk, and n6 is the number of vehicles exiting from the second entrance via the road section ending point trunk. The traffic flow of all section traffic flow information acquisition equipment on the road section is as follows: traffic flow observation value of acquisition device E1=n1, traffic flow of acquisition device R1=n2+n3+n4+n5, traffic flow of acquisition device E2=n2+n4, traffic flow of acquisition device R2=n3+n5+n6. Therefore, the whole traffic flow per unit time on the road section can be obtained by using the traffic flows of the acquisition devices R2, E1 and E2, and the calculation formula is as follows: traffic flow of R2+traffic flow of E1+traffic flow of E2= (n3+n5+n6) +n1+ (n2+n4).
This can be achieved by: and the sum of the section traffic flow of the last main road monitoring point on the road section and the section traffic flow of all the outlet monitoring points on the road section is the whole traffic flow of the road section. Expanding, if the main road section traffic flow information acquisition devices Rm-Rn and the outlet section traffic flow information acquisition devices Em-En are arranged from the starting point to the ending point of the statistical road section, the road section traffic flow is as follows:
。
according to the system for monitoring traffic flow in unit time based on the expressway, the invention also provides a method for monitoring traffic flow in unit time based on the expressway, as shown in fig. 3, which comprises the following steps:
step 1, traffic flow information of the point where traffic flow information of the main road section is collected by traffic flow information collection equipment R1-Rn of the main road section and traffic flow information of the exit section are collected by traffic flow information collection equipment E1-En of the exit section, and the collected traffic flow information and related information are sent to a monitoring center periodically.
In this step, the traffic flow information collected by the trunk section traffic flow information collection devices R1 to Rn and the exit section traffic flow information collection devices E1 to En each include: medium and small bus traffic flow, small truck traffic flow, medium and large truck traffic flow, oversized truck traffic flow, container truck traffic flow, motorcycle traffic flow, and the like. The related information includes: the method comprises the steps of identifying codes, traffic data processing cycles and time serial numbers of the section traffic flow information acquisition equipment.
And step 2, after the data acquisition and storage server of the monitoring center receives traffic flow information and related information periodically sent by the section traffic flow information acquisition equipment, time sequence data comprising the section traffic flow information is stored in a time sequence database.
In the step, after receiving traffic flow information and related information periodically sent by the section traffic flow information acquisition equipment, the data acquisition and storage server establishes a time master key by using a traffic data processing period and a time sequence number according to the rule of the equipment identity identification code, the equipment type, the equipment stake number and the sub-table of the uplink and downlink marks, and respectively inserts the received information into a corresponding equipment information table in a time sequence database, thereby completing the time sequence data storage function of traffic flow information according to the time sequence data of the section traffic flow information stored by the equipment point position and the lane sub-table.
And 3, the monitoring terminal sends an analysis request to the data analysis and display server, wherein the analysis request comprises the start-stop pile numbers and the start-stop time of the road sections to be counted.
And 4, reading traffic flow information of the road section traffic flow information acquisition equipment and the traffic flow information of all the exit section traffic flow information acquisition equipment in the road section, which are included in the start-stop pile number, from a time sequence database by the data analysis and display server according to the start-stop pile number and the start-stop time of the road section in the analysis request, calculating according to the start-stop time, and sending a calculation result to the monitoring terminal.
In the step, the data analysis and display server finds out the road section traffic flow information acquisition equipment information of the start-stop pile number and all the exit section traffic flow signals in the road section according to the road section start-stop pile number in the analysis request through the section traffic flow information acquisition equipment information table in the time sequence databaseCollecting equipment information; determining the table name of a time sequence database through the equipment information, then carrying out start-stop time filtration according to the start-stop time, summing the traffic flow of each acquisition equipment to obtain the traffic flow R of the last main road section and the traffic flow Em-En of each outlet section, and finally calculating according to the following formula to obtain the traffic flow of the road section in unit time:
the method comprises the steps of carrying out a first treatment on the surface of the And finally formatting the result and returning the result to the monitoring terminal.
And 5, the monitoring terminal displays the traffic flow in unit time according to the calculation result of the data analysis and display server.
In the step, the monitoring terminal displays the traffic flow in the unit time of the counted road section by using a WEB browser.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention includes, but is not limited to, the examples described in the detailed description, as other embodiments derived from the technical solutions of the invention by a person skilled in the art are equally within the scope of the invention.
Claims (9)
1. The utility model provides a monitoring system based on traffic flow in highway unit time which characterized in that: the system comprises a monitoring center and section traffic flow information acquisition equipment arranged on a highway, wherein the section traffic flow information acquisition equipment comprises a main road section traffic flow information acquisition equipment and an outlet section traffic flow information acquisition equipment, the outlet section traffic flow information acquisition equipment is arranged at each outlet position of the highway and used for acquiring traffic flow information of the outlet position, the main road section traffic flow information acquisition equipment is arranged at a position between two outlets of the highway and used for acquiring traffic flow information on a main road, and the section traffic flow information acquisition equipment sends the acquired traffic flow information and related information to the monitoring center through a communication network and is stored, analyzed and displayed by the monitoring center;
the monitoring center comprises a data acquisition and storage server, a data analysis and display server, a time sequence database, a monitoring terminal and a firewall which are connected together through a computer network;
the data acquisition and storage server is connected with the section traffic flow information acquisition equipment through a firewall, receives traffic flow information and related information sent by the section traffic flow information acquisition equipment, establishes a section traffic flow information acquisition equipment information table in a time sequence database, establishes a time main key by using a traffic data processing period and a time sequence number according to a sub-table rule of an equipment identity identification code, an equipment type, an equipment pile number and an uplink and downlink mark, and respectively inserts the received information into a corresponding equipment information table in the time sequence database;
the time sequence database is used for storing time sequence data processed by the data acquisition and storage server and is used for analysis by the data analysis and display server;
the data analysis and display server receives an analysis request of the monitoring terminal, finds out the road section traffic flow information acquisition equipment information of the start-stop pile number and all the exit section traffic flow information acquisition equipment information in the road section in a time sequence database according to the road section start-stop pile number and the start-stop time in the analysis request, sums the traffic flow of the start-stop pile number according to the section traffic flow information acquisition equipment information table, and obtains the traffic flow Rn of the last road section and the traffic flows Em-En of each exit section, and the traffic flow of the road section in unit time is calculated according to the following formula:
obtaining the traffic flow in the unit time of the road section, formatting the result and returning the result to the monitoring terminal;
the monitoring terminal is connected with the data analysis and display server, selects the start-stop pile number and the start-stop time of the road section to be counted, sends an analysis request to the data analysis and display server, and displays the traffic flow obtained by the data analysis and display server;
the traffic flow information acquired by the section traffic flow information acquisition device comprises: medium and small bus traffic flow, small truck traffic flow, medium truck traffic flow, large truck traffic flow, oversized truck traffic flow, container truck traffic flow and motorcycle traffic flow.
2. The highway traffic flow based monitoring system according to claim 1 wherein: the section traffic flow information acquisition equipment adopts millimeter wave radar to acquire traffic flow information.
3. The highway traffic flow based monitoring system according to claim 1 wherein: the related information comprises a section traffic flow information acquisition equipment identity identification code, a traffic data processing period and a time sequence number.
4. A highway traffic flow based monitoring system according to any one of claims 1-3 wherein: the traffic flow calculated by the data analysis and display server comprises medium and small bus traffic flow, large bus traffic flow, small truck traffic flow, medium truck traffic flow, large truck traffic flow, extra-large truck traffic flow, container truck traffic flow and motorcycle traffic flow.
5. A highway traffic flow based monitoring system according to any one of claims 1-3 wherein: and the monitoring terminal sends an analysis request to the data analysis and display server through the WEB browser, and displays the traffic flow through the WEB browser.
6. A monitoring method based on the monitoring system of traffic flow per unit time of expressway according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
step 1, a main road section traffic flow information acquisition device and an exit section traffic flow information acquisition device which are arranged on a highway acquire traffic flow information of a point where the traffic flow information is located in real time, and periodically transmit the acquired traffic flow information and related information to a monitoring center;
step 2, after the data acquisition and storage server of the monitoring center receives traffic flow information and related information periodically sent by the section traffic flow information acquisition equipment, time sequence data comprising the section traffic flow information are stored in a time sequence database;
step 3, the monitoring terminal sends an analysis request to the data analysis and display server, wherein the analysis request comprises a road section start-stop pile number and start-stop time which need to be counted;
step 4, the data analysis and display server reads the traffic flow information of the road section traffic flow information acquisition equipment included by the start-stop pile number and the traffic flow information of all the exit section traffic flow information acquisition equipment in the road section from the time sequence database according to the road section start-stop pile number and the start-stop time in the analysis request, calculates according to the start-stop time, and sends the calculation result to the monitoring terminal;
and 5, the monitoring terminal displays the traffic flow in unit time according to the calculation result of the data analysis and display server.
7. The method for monitoring the system for monitoring traffic flow per unit time on the expressway according to claim 6, wherein: the traffic flow information sent to the monitoring center by the traffic flow information acquisition equipment of the interruption surface in the step 1 comprises the following steps: medium and small bus traffic flow, small truck traffic flow, medium truck traffic flow, large truck traffic flow, extra large truck traffic flow, container truck traffic flow and motorcycle traffic flow through the section; the related information comprises a section traffic flow information acquisition equipment identity identification code, a traffic data processing period and a time sequence number.
8. The method for monitoring the system for monitoring traffic flow per unit time on the expressway according to claim 6, wherein: the specific implementation method of the step 2 is as follows: after receiving traffic flow information and related information periodically sent by the section traffic flow information acquisition equipment, the data acquisition and storage server establishes a section traffic flow information acquisition equipment information table in a time sequence database, establishes a time master key by using a traffic data processing period and a time sequence number according to the sub-table rule of equipment identity identification codes, equipment types, equipment stake numbers and uplink and downlink marks, and respectively inserts the received information into a corresponding equipment information table in the time sequence database to complete the time sequence data storage function of the traffic flow information.
9. The method for monitoring the system for monitoring traffic flow per unit time on the expressway according to claim 6, wherein: the specific implementation method of the step 4 is as follows: the data analysis and display server finds out the main road section traffic flow information acquisition equipment information to which the start-stop pile number belongs and all the exit section traffic flow information acquisition equipment information in the road section according to the road section start-stop pile number in the analysis request through a section traffic flow information acquisition equipment information table in the time sequence database; determining the table name of a time sequence database through the section traffic flow information acquisition equipment information, filtering the start-stop time according to the start-stop time, summing the traffic flow of each acquisition equipment to obtain the last main road section traffic flow Rn and each outlet section traffic flow Em-En, and calculating according to the following formula to obtain the traffic flow of the road section in unit time:
and finally, formatting the calculation result and returning the calculation result to the monitoring terminal. />
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210660289.4A CN115148020B (en) | 2022-06-13 | 2022-06-13 | Monitoring system and method based on traffic flow in unit time of expressway |
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