Intelligent induction system and method based on ramp free flow

Abstract

The invention discloses an intelligent guidance system and method based on ramp free flow, and the system comprises a ramp free flow transaction subsystem, a roadside guidance subsystem, an island head guidance subsystem, and a rapid release subsystem. The ramp free flow transaction subsystem comprises a ramp free flow guide module deployed on a toll server, a portal induction display screen arranged between a toll station and a ramp free flow portal, and portal license plate recognition equipment arranged on the ramp free flow portal; the roadside guiding subsystem comprises a roadside guiding module deployed on a charging server, and roadside guiding display screens and roadside guiding license plate recognition equipment which are arranged on two sides of an entrance of a charging plaza between a ramp free flow portal and an island head; the island head guiding subsystem comprises an island head guiding module deployed in the charging server, an island head guiding display screen arranged at the position of an island head and island head license plate recognition equipment; the rapid release subsystem comprises an ETC lane antenna; and multi-stage intelligent induction operation can be realized through each subsystem.

Description

Technical Field

[0001] The present application relates to the field of smart highway technology, and in particular to an intelligent induction system and method based on ramp free flow. Background Art

[0002] The abolition of provincial highway toll booths has led to a significant increase in the number of ETC vehicles, and a notable rise in the proportion of vehicles using ETC lanes. However, some toll plazas with high traffic volumes have been difficult to expand and renovate due to various restrictions. With the exponential growth in ETC users, the existing scale of toll plazas and ETC lanes has led to increasing congestion and reduced traffic efficiency, placing significant pressure on front-end lane operations.

[0003] Therefore, how to maximize the travel speed of ETC vehicles and shorten the travel time of ETC vehicles under the existing ETC lane scale has become an urgent problem that needs to be solved. Summary of the Invention

[0004] To address the problems of existing ETC lanes often requiring vehicles to back out of lanes when faced with complex traffic conditions involving special vehicles, severely impacting traffic efficiency and posing certain safety risks, the present invention provides an intelligent guidance system based on ramp free flow. This system, through a multi-level guidance system, can guide transaction vehicles to the correct lane in real time, effectively improving traffic efficiency, avoiding queues of ETC vehicles at toll stations during periods of heavy traffic, and reducing safety risks. The present invention also relates to an intelligent guidance method based on ramp free flow.

[0005] The technical solutions of the present invention are as follows:

[0006] An intelligent guidance system based on ramp free flow, including a ramp free flow transaction subsystem, a roadside guidance subsystem, an island guidance subsystem and a rapid release subsystem;

[0007] The ramp free-flow transaction subsystem includes a ramp free-flow guidance module deployed on a toll collection server, a gantry guidance display screen disposed between the toll booth and the ramp free-flow gantry, and a gantry license plate recognition device disposed on the ramp free-flow gantry. After a vehicle enters the toll collection area, the ramp free-flow guidance module automatically receives the license plate information recognized by the gantry license plate recognition device, confirms the vehicle's identity based on the recognized license plate information, and then triggers the corresponding free-flow transaction operation for the vehicle. If the free-flow transaction is successful, no guidance operation is performed. If the free-flow transaction fails, the ramp free-flow guidance module controls the gantry guidance display screen to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane.

[0008] The roadside guidance subsystem includes a roadside guidance module deployed on the toll collection server, a roadside guidance display screen and a roadside guidance license plate recognition device arranged on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head; when a vehicle reaches the toll plaza entrance, the roadside guidance module automatically receives the license plate information recognized by the roadside guidance license plate recognition device; upon receiving the free-flow transaction failure result corresponding to the license plate pushed by the ramp free-flow transaction subsystem, the roadside guidance module controls the roadside guidance display screen to display a second guidance message in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane;

[0009] The island head guidance subsystem includes an island head guidance module deployed on the toll collection server, an island head guidance display screen and an island head license plate recognition device set at the island head position; when a vehicle drives to the island head, the island head guidance module automatically receives the license plate information recognized by the island head license plate recognition device, and when receiving the free flow transaction failure result corresponding to the license plate pushed by the ramp free flow transaction subsystem, the island head guidance module controls the island head guidance display screen to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane;

[0010] When a vehicle arrives at the ETC lane, the fast release subsystem receives the vehicle tag information through the ETC lane antenna and matches the free-flow transaction result corresponding to the vehicle tag information. When the free-flow transaction success result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received, the vehicle is directly released to pass by the barrier. When the free-flow transaction failure result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received or the free-flow transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is not received, the ETC transaction processing is entered.

[0011] Preferably, the ramp free-flow transaction subsystem also includes a ramp free-flow transaction result push module deployed on the toll server, and the ramp free-flow transaction result push module pushes the ramp free-flow transaction result corresponding to the identified license plate to the roadside guidance subsystem, the island guidance subsystem and the fast release subsystem in real time through the toll network; and the pushed data format is a unified standard format, including license plate information, transaction results, pass information, transaction information, and failure reasons.

[0012] Preferably, in the ramp free-flow transaction subsystem, when the free-flow transaction fails, the ramp free-flow guidance module intelligently plans and generates first guidance information based on real-time traffic flow and congestion conditions in surrounding lanes, and then controls the gantry guidance display screen to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane;

[0013] In the roadside guidance subsystem, upon receiving the result of the failed free-flow transaction corresponding to the license plate pushed by the ramp free-flow transaction subsystem, the roadside guidance module intelligently plans and generates a second guidance message based on the traffic situation at the toll plaza entrance area at that time, and then controls the roadside guidance display screen to display the second guidance message in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane;

[0014] In the island head guidance subsystem, when the free flow transaction failure result corresponding to the license plate pushed by the ramp free flow transaction subsystem is received, the island head guidance module intelligently plans and generates the third guidance information based on the real-time traffic conditions around the island head, and then controls the island head guidance display screen to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane.

[0015] Preferably, in the ramp free-flow transaction subsystem, the gantry induction display screen is arranged at a first distance from the ramp free-flow gantry close to the toll booth side;

[0016] In the roadside guidance subsystem, the roadside guidance display screen is arranged at the junction of the expressway and the toll plaza, and the roadside guidance license plate recognition device is arranged at a second distance from the roadside guidance display screen to the toll plaza side;

[0017] In the island head guidance subsystem, the island head license plate recognition device is set at the front of the island head, the recognition area is set in the range of two adjacent lanes at the third distance in front of the island head, and the island head induction display screen is set in the middle of the island head, outside the ETC lane antenna transaction range and at the fourth distance from the island head license plate recognition device.

[0018] Preferably, the ramp free-flow transaction result push module communicates with other subsystems through UDP messages of the toll network to push messages of transaction results. All devices connected to the toll network are configured with intranet IP. The communication message format is a json data packet. The message content includes license plate number, license plate color, vehicle tag MAC address, vehicle tag contract serial number, card number, entry station, entry time, vehicle model, vehicle type, transaction time, amount, transaction result, failure reason, and transaction serial number, and each field in the message content has a clear type and length limit.

[0019] Preferably, the corresponding guidance information of the gantry guidance display screen, the roadside guidance display screen and the island head guidance display screen will be refreshed to the default content after being displayed for a maximum of the first preset time; the gantry guidance display screen supports the simultaneous display of multiple guidance information; in the case of congestion in the ETC lane, the lane congestion information will be displayed through the roadside guidance display screen to prompt subsequent vehicles to pass through other normal lanes.

[0020] Preferably, the quick release subsystem is used to receive vehicle tag information through the ETC lane antenna and match the free-flow transaction result corresponding to the vehicle tag information. When a successful free-flow transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received within the second preset time, the barrier is directly raised to release the vehicle. When a failure transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received within the second preset time or when the free-flow transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is not received within the second preset time, the ETC transaction processing is entered.

[0021] An intelligent induction method based on ramp free flow includes the following steps:

[0022] Free-flow gantry transaction steps: After a vehicle enters the toll area, the gantry license plate recognition device installed on the ramp free-flow gantry automatically recognizes the license plate information and confirms the vehicle's identity based on the recognized license plate information, thereby triggering the corresponding free-flow transaction operation for the vehicle and pushing the free-flow transaction result to the toll network. If the free-flow transaction is successful, no guidance operation is performed; if the free-flow transaction fails, the gantry guidance display screen installed between the toll station and the ramp free-flow gantry is controlled to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane;

[0023] Roadside guidance step: When a vehicle reaches the toll plaza entrance, the license plate information is automatically recognized by the roadside guidance license plate recognition equipment installed on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head. When a free-flow transaction failure result corresponding to the license plate is received from the toll network, the roadside guidance display screens installed on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head are controlled to display a second guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane;

[0024] Island head guidance step: When a vehicle reaches the island head, the license plate information is automatically recognized by the license plate recognition device installed at the island head position. When a free-flow transaction failure result corresponding to the license plate is received from the toll network, the island head guidance display screen installed at the island head position is controlled to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane;

[0025] Lane quick release steps: When a vehicle arrives at the ETC lane, the vehicle tag information is automatically received through the ETC lane antenna, and the free-flow transaction result corresponding to the vehicle tag information is matched. When the free-flow transaction success result corresponding to the vehicle tag information is received from the toll network, the barrier is directly raised to release the vehicle to pass. When the free-flow transaction failure result corresponding to the vehicle tag information is received from the toll network or the free-flow transaction result corresponding to the vehicle tag information is not received from the toll network, the ETC transaction processing is entered.

[0026] Preferably, in the free-flow gantry transaction step, when the free-flow transaction fails, first guidance information is intelligently planned and generated based on real-time traffic flow and congestion conditions in surrounding lanes, and the gantry guidance display screen is controlled to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane;

[0027] In the roadside guidance step, when a result indicating a failed free-flow transaction corresponding to the license plate is received from the toll network, a second guidance message is intelligently planned and generated based on the traffic situation at the toll plaza entrance area at that time, and the roadside guidance display screen is controlled to display the second guidance message in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane;

[0028] In the island head guidance step, when the free flow transaction failure result corresponding to the license plate is received from the toll network, the third guidance information is intelligently planned and generated based on the real-time traffic conditions around the island head, and then the island head guidance display screen is controlled to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane.

[0029] Preferably, the charging network communicates based on the UDP protocol to push messages about transaction results. All devices connected to the charging network are configured with an intranet IP. The communication message format is a json data packet. The message content includes the license plate number, license plate color, vehicle tag MAC address, vehicle tag contract serial number, card number, entry station, entry time, vehicle model, vehicle type, transaction time, amount, transaction result, reason for failure, and transaction serial number, and each field in the message content has a clear type and length limit.

[0030] The beneficial effects of the present invention are as follows:

[0031] The present invention provides an intelligent guidance system based on ramp free flow, including a ramp free flow transaction subsystem, a roadside guidance subsystem, an island head guidance subsystem and a fast release subsystem, wherein the ramp free flow transaction subsystem includes a ramp free flow guidance module deployed on a toll collection server, a gantry guidance display screen arranged between a toll station and a ramp free flow gantry, and a gantry license plate recognition device arranged on the ramp free flow gantry. After a vehicle enters the toll area, the ramp free flow guidance module automatically receives the license plate information recognized by the gantry license plate recognition device, and confirms the vehicle identity based on the recognized license plate information, thereby triggering the free flow transaction operation corresponding to the vehicle. When the flow transaction fails, the ramp free-flow guidance module controls the gantry induction display screen to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane. In this way, the gantry license plate recognition device set on the ramp free-flow gantry can identify the license plate and complete the free-flow pre-transaction of the ETC vehicle. When the transaction fails, the induction screen is triggered in real time to display the first guidance information, and the special-situation vehicle is diverted to the mixed lane in advance to avoid it from mistakenly entering the ETC lane and causing congestion; the roadside guidance subsystem includes a roadside guidance module deployed on the toll server, and a roadside on both sides of the toll plaza entrance set between the ramp free-flow gantry and the island head. The induction display screen and the roadside induction license plate recognition device. When the vehicle drives to the toll plaza entrance, the roadside guidance module automatically receives the license plate information recognized by the roadside induction license plate recognition device. When the license plate corresponding to the free flow transaction fails, the roadside guidance module controls the roadside induction display screen to display the second guidance information in real time. The second guidance information is displayed on the roadside induction screen at the toll plaza entrance to ensure that the vehicle can see the corresponding induction information before entering the toll plaza, and gives a second reminder to the vehicle that fails the ramp transaction to ensure that the special situation vehicle adjusts its driving path in time; the island head guidance subsystem includes the island head guidance module deployed on the toll server, the island head induction module set at the island head position, and the island head guidance module deployed on the toll server. Display screen and island head license plate recognition device. When a vehicle drives to the island head, the island head guidance module automatically receives the license plate information recognized by the island head license plate recognition device. When the free flow transaction corresponding to the license plate fails, the island head guidance module controls the island head guidance display screen to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane, and give a third reminder to the vehicle whose ramp transaction failed. The third guidance information is displayed when the vehicle approaches the island head position where the lane is diverged. It can specifically guide the vehicle whose transaction failed to enter the mixed lane to avoid lane selection error, thereby preventing the special situation vehicle from entering the ETC lane and having to reverse across the toll plaza due to inability to pass.The quick release subsystem is used to receive vehicle tag information through the ETC lane antenna when the vehicle arrives at the ETC lane, and match the free-flow transaction result corresponding to the vehicle tag information. When the free-flow transaction is successful, the barrier is directly raised to allow the vehicle to pass. Compared with the existing ETC lane, it only needs to read the OBU, which reduces the card reading, transaction and other links, speeds up the barrier raising speed, realizes the zero-waiting passage experience, and gives full play to the high efficiency advantage of the ETC lane. When the free-flow transaction fails, it will enter the ETC transaction processing to avoid congestion caused by vehicles reselecting lanes. The present invention utilizes a multi-level guidance subsystem, jointly constructed with a ramp free-flow transaction subsystem, a roadside guidance subsystem, and an island guidance subsystem. Based on the transaction results of the gantry guidance display screen, the toll plaza roadside guidance display screen, and the toll lane island guidance display screen, the special situation vehicles are intelligently guided to pass directly through mixed lanes. This achieves full-process, multi-level guidance for special situation vehicles, guiding transaction vehicles to the correct lane in real time, effectively preventing special situation vehicles from blocking ETC lanes. If the ETC lane is already congested, subsequent vehicles are prompted to use other normal lanes, avoiding queues and reverse queues after entering the abnormal lane. This maximizes the speed of ETC vehicles and reduces the travel time of ETC vehicles within the existing ETC lane scale, thereby improving lane traffic efficiency, effectively alleviating traffic pressure in toll lanes and toll plazas, and avoiding queues of ETC vehicles at toll stations during heavy traffic, thus reducing safety hazards.

[0032] The ramp free-flow transaction subsystem provided by the present invention also includes a ramp free-flow transaction result push module deployed on the toll server. After a vehicle completes a free-flow transaction, the ramp free-flow transaction result push module will push information including license plate information, transaction results, passage information, transaction information, failure reasons, etc. to the roadside guidance subsystem, island head guidance subsystem, and rapid release subsystem in real time through the toll network. In this way, when the vehicle travels to the toll plaza entrance, island head, or ETC lane, each subsystem can match the vehicle information in the toll network based on the recognized license plate. If the transaction fails, multi-level induction processing will be performed.

[0033] The gantry induction display screen of the present invention is arranged at the first distance of the ramp free flow gantry close to the toll station side, the roadside induction display screen is arranged at the connection between the highway and the toll plaza, the roadside induction license plate recognition equipment is arranged at the second distance of the roadside induction display screen away from the toll station side, the island head license plate recognition equipment is arranged at the front of the island head, and the recognition area is arranged in the range of two adjacent lanes at the third distance in front of the island head. The island head induction display screen is arranged in the middle of the island head, and is located outside the transaction range of the ETC lane antenna at the fourth distance from the island head license plate recognition equipment. In this way, the vehicle can be induced and prompted multiple times according to the vehicle's driving path when it enters the toll area, drives to the toll plaza entrance, drives to the island head and other different positions in sequence, providing multiple guarantees for guiding the transaction vehicles to pass through the correct lane, effectively improving the traffic efficiency, avoiding the situation where ETC vehicles queue up at the toll station when the traffic is dense, and reducing safety hazards.

[0034] The ramp free-flow transaction result push module of the present invention communicates with other subsystems through UDP messages of the toll network to push transaction result messages. UDP communication does not require complex verification processes such as three-way handshakes, thereby improving communication efficiency. All devices connected to the toll network are configured with an intranet IP, which makes up for the security issues of the UDP protocol and improves the security of the toll network. The lightweight and easy-to-parse JSON format is used as the message format to reduce the complexity of docking between systems.

[0035] The guidance information displayed on each guidance display screen provided by the present invention is displayed for a maximum of a first preset time, after which it is refreshed to the default content. This prevents the prolonged display of invalid guidance information. In the event of congestion in an ETC lane, the lane congestion information can be displayed on the roadside guidance display screen of that lane, prompting subsequent vehicles to use other normal lanes, thereby preventing subsequent vehicles from entering the abnormal lane and being forced to queue for reverse, effectively improving traffic efficiency and reducing safety hazards.

[0036] When the fast release subsystem of the present invention receives the free-flow transaction success result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem within the second preset time, it directly lifts the barrier to release the vehicle to pass, reducing the card reading and writing process and speeding up the ETC transaction speed; when the transaction failure result corresponding to the vehicle tag information is received within the second preset time or when the free-flow transaction result corresponding to the vehicle tag information is not received within the second preset time, it enters the ETC transaction processing, and the transaction is carried out normally according to the original ETC process. The second preset time is set to limit the validity of the transaction information, which can avoid the result of the vehicle's previous passage affecting the current passage and causing transaction confusion.

[0037] The present invention also provides an intelligent induction method based on ramp free flow, which corresponds to the above-mentioned intelligent induction system based on ramp free flow, and can be understood as an implementation method of the above-mentioned intelligent induction system based on ramp free flow. The method includes a free flow gantry transaction step, a roadside guidance step, an island head guidance step and a lane quick release step. After the vehicle enters the toll area, the free flow transaction of the vehicle is completed through the free flow gantry transaction step, and the first induction is performed on the vehicle that failed the free flow transaction, reminding the vehicle to pass through the mixed lane; when the vehicle reaches the entrance of the toll plaza, the free flow transaction is completed through the roadside guidance step. Failed vehicles are guided a second time, intelligently directing them to the mixed lane. When they reach the island, they are guided a third time through the island guidance process, intelligently directing them to the mixed lane. This prevents vehicles with special circumstances from entering the ETC lane and being forced to reverse across the toll plaza due to impassability. When vehicles reach the ETC lane, vehicles with failed free-flow transactions are quickly released through the lanes, allowing them to enter the ETC transaction process. Meanwhile, vehicles with successful free-flow transactions are directly released, achieving a zero-wait experience and fully leveraging the efficiency of the ETC lane. By directing vehicles with special circumstances (such as removed tags, blacklisted vehicles, insufficient balances, or abnormal routes) to the manual lane, toll collectors will manually handle these vehicles. If a vehicle with special circumstances has already entered the ETC lane, the multi-level intelligent guidance system, which follows its route through the first, second, and third inductions, can guide subsequent vehicles to other normal lanes for rapid passage, effectively improving traffic efficiency and reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a preferred architecture diagram of the intelligent induction system based on ramp free flow of the present invention.

[0039] Figure 2 This is a schematic diagram of the layout of the induction equipment of the present invention.

[0040] Figure 3 This is the device network topology diagram of the present invention.

[0041] Figure 4 This is a schematic diagram of the lane rapid toll display content of the present invention.

[0042] Figure 5 This is a schematic diagram of the ramp free flow gantry fee display content of the present invention.

[0043] Figure 6 This is a schematic diagram of the roadside guidance display content of the present invention.

[0044] Figure 7 This is a schematic diagram of the island head induction display content of the present invention.

[0045] Figure 8 This is a flow chart of the intelligent induction method based on ramp free flow of the present invention. DETAILED DESCRIPTION

[0046] In order to more clearly understand the content of the present invention, it will be described in detail with reference to the accompanying drawings and embodiments.

[0047] The crux of the congestion in ETC lanes lies in the inadequate mechanism for handling vehicles in special situations. There is a lack of dynamic guidance and emergency response plans for vehicles in special situations such as those with removed labels, blacklisted accounts, insufficient balances, and abnormal path information, which results in vehicles having to reverse out of lanes or even cross the plaza. Moreover, if the transaction with the vehicle in front fails, the vehicle entering the lane behind will also be unable to complete the transaction, which not only easily leads to congestion in the lanes and toll plazas, but also poses a huge safety hazard. In order to solve the above problems, further improve the quality of ETC traffic, and enhance user experience, a ramp ETC free-flow intelligent induction mechanism is set up at the toll station to improve the overall traffic capacity of the toll plaza. The present invention proposes an intelligent induction system based on ramp free flow, including a ramp free-flow transaction subsystem, a roadside guidance subsystem, an island guidance subsystem, and a fast release subsystem. Each subsystem constitutes a multi-level induction system. The induction information of special-situation vehicles is displayed on a multi-level induction display screen to guide special-situation vehicles to pass through mixed lanes, effectively improving traffic efficiency, avoiding the situation where ETC vehicles queue up at toll stations when traffic is dense, and reducing safety hazards. Specifically, Figure 1 and Figure 2 As shown, the intelligent guidance system of ramp free flow includes a ramp free flow transaction subsystem, a roadside guidance subsystem, an island guidance subsystem and a fast release subsystem, wherein the ramp free flow transaction subsystem includes a ramp free flow guidance module and a ramp free flow transaction result push module deployed on the toll server, a gantry guidance display screen set at a first distance from the ramp free flow gantry close to the toll station side, and a gantry license plate recognition device set on the ramp free flow gantry, and the roadside guidance subsystem includes a roadside guidance module deployed on the toll server, a ramp free flow The roadside induction display screens on both sides of the toll plaza entrance between the gantry and the island head and the roadside induction license plate recognition device set at the second distance from the roadside induction display screen to the toll station side, the island head guidance subsystem includes the island head guidance module deployed on the toll server, the island head license plate recognition device set at the front of the island head and the recognition area is set in the adjacent two lanes at the third distance in front of the island head and the island head induction display screen set in the middle of the island head and is located outside the transaction range of the ETC lane antenna at the fourth distance from the island head license plate recognition device, the fast release subsystem includes the ETC lane antenna.

[0048] Furthermore, if Figure 2The schematic diagram of the guidance equipment layout is shown. The guidance equipment includes a gantry license plate recognition device, a gantry guidance display screen, a roadside guidance license plate recognition device, a roadside guidance display screen, an island license plate recognition device, and an island guidance display screen, forming a multi-level guidance mechanism of gantry guidance, roadside guidance, and island guidance. The gantry guidance display screen is located 50-100 meters (preferably a first distance) behind the ramp free-flow gantry, the roadside guidance display screen is located at the junction of the expressway and the toll plaza, and the roadside guidance license plate recognition device is located 100-150 meters (preferably a second distance) in front of the roadside guidance display screen to ensure that vehicles can see the corresponding guidance information before entering the toll plaza. The recognition area of the island license plate recognition device is located within the adjacent two lanes 30-50 meters (preferably a third distance) in front of the island, ensuring that vehicles can see the guidance information before entering the lane. The island guidance display screen is located outside the ETC lane antenna transaction range, 5-10 meters (preferably a fourth distance) from the island license plate recognition device to avoid misjudgment when a special vehicle appears in the lane and subsequent normal vehicles enter the antenna transaction range. Based on the transaction results of the free-flow gantry and in combination with the license plate recognition equipment arranged at various locations in the toll plaza, the present invention sends the guidance information to the various arranged guidance display screens, and guides drivers and passengers to choose the correct lane to pass through through the guidance display screens, thereby increasing the speed of vehicles that successfully complete the free-flow transaction and reducing the congestion in the ETC lanes caused by special vehicles.

[0049] like Figure 3 As shown, in the intelligent guidance system for ramp free flow in an embodiment of the present invention, a toll collection server is connected to corresponding devices of various subsystems distributed around a free flow gantry (ramp free flow gantry) through a toll network. These devices include toll lanes (including ETC lanes and mixed lanes), toll island guidance display screens (island guidance display screens), island license plate recognition devices, roadside guidance display screens, roadside guidance license plate recognition devices, gantry guidance display screens, gantry license plate recognition devices, etc. After a vehicle enters the toll area, the ramp free flow guidance module automatically receives the license plate information recognized by the gantry license plate recognition device and confirms the vehicle identity based on the recognized license plate information, thereby triggering the corresponding free flow transaction operation for the vehicle and pushing the free flow transaction results to the toll network for other subsystems to perform intelligent guidance processing based on the free flow transaction results through a multi-level guidance system, thereby effectively improving traffic efficiency, avoiding the situation where ETC vehicles wait in queues at toll stations when traffic is dense, and reducing safety hazards.

[0050] like Figure 2As shown in the figure, when a vehicle enters the toll area, the ramp free-flow transaction subsystem identifies the license plate through the gantry license plate recognition device. The ramp free-flow guidance module confirms the vehicle's identity based on the identified license plate information, thereby triggering the corresponding free-flow transaction operation for the vehicle. The ramp free-flow transaction result corresponding to the identified license plate, such as license plate number, license plate color, vehicle tag MAC address, vehicle tag contract serial number, card number, entry station, entry time, vehicle model, vehicle type, transaction time, amount, transaction result, failure reason, transaction serial number, etc., is pushed to the roadside guidance subsystem, island guidance subsystem, and rapid release subsystem in real time through the free-flow transaction result push module in a unified JSON format (each field in the message content has a clear type and length limit) via the toll network based on the UDP protocol. When the free-flow transaction is successful, no guidance operation is performed; when the free-flow transaction fails, the ramp free-flow guidance module intelligently plans and generates the first guidance information based on the real-time traffic flow and congestion of the surrounding lanes, controls the gantry guidance display screen to display the first guidance information in real time, and performs the first guidance to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane.

[0051] If the vehicle does not follow the first guidance and continues to move forward, when the vehicle drives to the toll plaza entrance, the roadside guidance module automatically receives the license plate information recognized by the roadside guidance license plate recognition device. When the free-flow transaction failure result corresponding to the license plate is received from the ramp free-flow transaction subsystem, the roadside guidance module intelligently plans and generates a second guidance information based on the traffic situation in the toll plaza entrance area at this time, and then controls the roadside guidance display screen to display the second guidance information in real time, and conducts a second guidance to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane.

[0052] If the vehicle still does not respond to the first two inductions and continues to move forward, when the vehicle reaches the island head, the island head guidance module automatically receives the license plate information recognized by the island head license plate recognition device. When the free flow transaction failure result corresponding to the license plate pushed by the ramp free flow transaction subsystem is received, the island head guidance module intelligently plans and generates the third guidance information based on the real-time traffic conditions around the island head, and then controls the island head induction display screen to display the third guidance information in real time, and conducts the third induction to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane, and ensures that the vehicle selects the correct lane through a multi-stage induction mechanism.

[0053] When a vehicle arrives at the ETC lane, the fast release subsystem receives the vehicle tag information through the ETC lane antenna (the vehicle tag information is received through the on-board unit (OBU) in the vehicle), and matches the vehicle tag information with the free flow transaction result within the second preset time (such as 40 minutes). When the free flow transaction success result corresponding to the vehicle tag information pushed by the ramp free flow transaction subsystem is received, the barrier is directly raised to allow the vehicle to pass. Figure 4 The prompt information of successful free-flow transaction shown includes license plate number, toll, etc. Compared with the existing ETC lane, the fast release subsystem only needs to read the OBU, which reduces the card reading, transaction and other links, speeds up the barrier lifting speed, and realizes zero-waiting passage experience; when the vehicle tag information pushed by the ramp free-flow transaction subsystem corresponds to the free-flow transaction failure result within the second preset time (such as 40 minutes) or the free-flow transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is not received, the ETC transaction processing is entered, and the transaction is carried out normally according to the original ETC process to avoid congestion caused by vehicles reselecting lanes.

[0054] Furthermore, all devices connected to the toll network are configured with an intranet IP, which improves the security of the toll network.

[0055] Furthermore, the corresponding guidance information of the gantry guidance display screen, roadside guidance display screen and island head guidance display screen in the embodiment of the present invention will be refreshed to the default content after being displayed for a maximum of a first preset time (such as 20 seconds). The gantry guidance display screen supports the simultaneous display of multiple guidance information, such as Figure 5 As shown, the license plate number is displayed on the top and the reason for the free flow transaction failure is displayed on the bottom. The default display content shows the ETC logo on the top and the pre-transaction on the bottom. Figure 6 As shown, the roadside guidance display screen displays the license plate number and the reason for the license plate transaction failure. If the transaction result corresponding to the license plate identified by the roadside guidance license plate recognition device is successful, the roadside guidance display screen will also be refreshed to display the lane opening style. Figure 7 As shown, the island-head guidance display screen displays the license plate number and lane selection information. If the transaction result corresponding to the license plate recognized by the island-head license plate recognition device is successful, the island-head license plate recognition device will also be refreshed to display the lane opening mode. In the case of congestion in the ETC lane, the lane congestion information will be displayed on the roadside guidance display screen to prompt subsequent vehicles to use other normal lanes.

[0056] Based on the same inventive concept, one or more embodiments of this specification also provide an intelligent induction method based on ramp free flow. Since the principle of the problem solved by the intelligent induction method based on ramp free flow is similar to that of the aforementioned intelligent induction system based on ramp free flow, the implementation of the intelligent induction method based on ramp free flow can refer to the implementation of the intelligent induction system based on ramp free flow, and the repeated parts will not be repeated. Specifically, Figure 8 As shown, the following steps are included:

[0057] The free-flow gantry transaction step involves automatically identifying the vehicle's license plate information after the vehicle enters the toll area through a gantry license plate recognition device installed on the ramp free-flow gantry. The vehicle's identity is confirmed based on the identified license plate information, triggering a free-flow transaction operation corresponding to the vehicle and pushing the free-flow transaction result to the toll collection network. If the free-flow transaction is successful, no guidance operation is performed. If the free-flow transaction fails, the gantry guidance display screen installed between the toll booth and the ramp free-flow gantry is controlled to display the first guidance information in real time, intelligently guiding the special-situation vehicle corresponding to the license plate to pass through the mixed lane.

[0058] A roadside guidance step, when a vehicle drives to the toll plaza entrance, the license plate information is automatically recognized by the roadside guidance license plate recognition equipment installed on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head; when a free-flow transaction failure result corresponding to the license plate is received from the toll network, the roadside guidance display screens installed on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head are controlled to display a second guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane;

[0059] In an island head guidance step, when a vehicle reaches the island head, the license plate information is automatically recognized by the license plate recognition device installed at the island head position. When a free-flow transaction failure result corresponding to the license plate is received from the toll network, the island head guidance display screen installed at the island head position is controlled to display a third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane;

[0060] Lane quick release step: when a vehicle arrives at the ETC lane, the vehicle tag information is automatically received through the ETC lane antenna, and the free-flow transaction result corresponding to the vehicle tag information is matched. When the free-flow transaction success result corresponding to the vehicle tag information is received from the toll network, the barrier is directly raised to release the vehicle to pass. When the free-flow transaction failure result corresponding to the vehicle tag information is received from the toll network or the free-flow transaction result corresponding to the vehicle tag information is not received from the toll network, the ETC transaction processing is entered.

[0061] Furthermore, in the free-flow gantry transaction step, when the free-flow transaction fails, based on the real-time traffic flow and the congestion of the surrounding lanes, the first guidance information is intelligently planned and generated, and then the gantry guidance display screen is controlled to display the first guidance information in real time, and the first guidance is performed to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane;

[0062] In the roadside guidance step, when a result indicating a failed free-flow transaction corresponding to the license plate is received from the toll network, a second guidance message is intelligently planned and generated based on the traffic situation at the toll plaza entrance area at that time, and the roadside guidance display screen is controlled to display the second guidance message in real time, thereby performing a second guidance to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane;

[0063] In the island head guidance step, when the free flow transaction failure result corresponding to the license plate is received from the toll network, the third guidance information is intelligently planned and generated based on the real-time traffic conditions around the island head, and then the island head guidance display screen is controlled to display the third guidance information in real time, and a third guidance is performed to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane.

[0064] Furthermore, the charging network communicates based on the UDP protocol to push messages of transaction results. All devices connected to the charging network are configured with an intranet IP. The communication message format is a json data packet. The message content includes license plate number, license plate color, vehicle tag MAC address, vehicle tag contract serial number, card number, entry station, entry time, vehicle model, vehicle type, transaction time, amount, transaction result, failure reason, transaction serial number, and each field in the message content has a clear type and length limit.

[0065] The present invention provides an intelligent guidance system and method based on ramp free flow, which constructs a multi-level linkage intelligent guidance mechanism. Through precise phased guidance and efficient transaction processing, it solves the problem of vehicle communication and vehicle guidance after ramp free flow transactions, significantly improves the traffic efficiency of special situation vehicles, and effectively avoids vehicle stagnation, lane changes, etc. caused by transaction failures, thereby reducing congestion in toll lanes and squares, reducing safety hazards, providing users with a smooth traffic experience, and also greatly improving the overall operational efficiency of toll stations.

[0066] It should be noted that the specific embodiments described above can enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Therefore, although this specification has described the present invention in detail with reference to the drawings and embodiments, those skilled in the art should understand that the present invention can still be modified or replaced with equivalents. In short, all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of protection of the patent for the present invention.

Claims

1. An intelligent guidance system based on ramp free flow, characterized in that: It includes ramp free-flow transaction subsystem, roadside guidance subsystem, island guidance subsystem and rapid release subsystem; The ramp free-flow transaction subsystem includes a ramp free-flow guidance module deployed on a toll collection server, a gantry guidance display screen disposed between the toll booth and the ramp free-flow gantry, and a gantry license plate recognition device disposed on the ramp free-flow gantry. After a vehicle enters the toll collection area, the ramp free-flow guidance module automatically receives the license plate information recognized by the gantry license plate recognition device, confirms the vehicle's identity based on the recognized license plate information, and then triggers the corresponding free-flow transaction operation for the vehicle. If the free-flow transaction is successful, no guidance operation is performed. If the free-flow transaction fails, the ramp free-flow guidance module controls the gantry guidance display screen to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane. The roadside guidance subsystem includes a roadside guidance module deployed on the toll collection server, a roadside guidance display screen and a roadside guidance license plate recognition device arranged on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head; when a vehicle reaches the toll plaza entrance, the roadside guidance module automatically receives the license plate information recognized by the roadside guidance license plate recognition device; upon receiving the free-flow transaction failure result corresponding to the license plate pushed by the ramp free-flow transaction subsystem, the roadside guidance module controls the roadside guidance display screen to display a second guidance message in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane; The island head guidance subsystem includes an island head guidance module deployed on the toll collection server, an island head guidance display screen and an island head license plate recognition device set at the island head position; when a vehicle drives to the island head, the island head guidance module automatically receives the license plate information recognized by the island head license plate recognition device, and when receiving the free flow transaction failure result corresponding to the license plate pushed by the ramp free flow transaction subsystem, the island head guidance module controls the island head guidance display screen to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane; When a vehicle arrives at the ETC lane, the fast release subsystem receives the vehicle tag information through the ETC lane antenna and matches the free-flow transaction result corresponding to the vehicle tag information. When the free-flow transaction success result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received, the vehicle is directly released to pass by the barrier. When the free-flow transaction failure result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received or the free-flow transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is not received, the ETC transaction processing is entered.

2. The system according to claim 1, wherein: The ramp free-flow transaction subsystem also includes a ramp free-flow transaction result push module deployed on the toll server. The ramp free-flow transaction result push module pushes the ramp free-flow transaction result corresponding to the identified license plate to the roadside guidance subsystem, island guidance subsystem and fast release subsystem in real time through the toll network; and the pushed data format is a unified standard format, including license plate information, transaction results, pass information, transaction information, and failure reasons.

3. The system according to claim 1 or 2, characterized in that In the ramp free-flow transaction subsystem, when the free-flow transaction fails, the ramp free-flow guidance module intelligently plans and generates first guidance information based on real-time traffic flow and congestion in surrounding lanes, and then controls the gantry guidance display to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane; In the roadside guidance subsystem, upon receiving the result of the failed free-flow transaction corresponding to the license plate pushed by the ramp free-flow transaction subsystem, the roadside guidance module intelligently plans and generates a second guidance message based on the traffic situation at the toll plaza entrance area at that time, and then controls the roadside guidance display screen to display the second guidance message in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane; In the island head guidance subsystem, when the free flow transaction failure result corresponding to the license plate pushed by the ramp free flow transaction subsystem is received, the island head guidance module intelligently plans and generates the third guidance information based on the real-time traffic conditions around the island head, and then controls the island head guidance display screen to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane.

4. The system according to claim 1, wherein: In the ramp free-flow transaction subsystem, the gantry induction display screen is arranged at a first distance from the ramp free-flow gantry to the toll booth side; In the roadside guidance subsystem, the roadside guidance display screen is arranged at the junction of the expressway and the toll plaza, and the roadside guidance license plate recognition device is arranged at a second distance from the roadside guidance display screen to the toll plaza side; In the island head guidance subsystem, the island head license plate recognition device is set at the front of the island head, the recognition area is set in the range of two adjacent lanes at the third distance in front of the island head, and the island head induction display screen is set in the middle of the island head, outside the ETC lane antenna transaction range and at the fourth distance from the island head license plate recognition device.

5. The system according to claim 2, wherein: The ramp free-flow transaction result push module communicates with other subsystems through UDP messages of the toll network to push transaction result messages. All devices connected to the toll network are configured with an intranet IP. The communication message format is a JSON data packet. The message content includes license plate number, license plate color, vehicle tag MAC address, vehicle tag contract serial number, card number, entry station, entry time, vehicle model, vehicle type, transaction time, amount, transaction result, failure reason, and transaction serial number. Each field in the message content has a clear type and length limit.

6. The system according to claim 1, wherein: The corresponding guidance information of the gantry guidance display screen, the roadside guidance display screen and the island head guidance display screen will be refreshed to the default content after being displayed for a maximum of the first preset time; the gantry guidance display screen supports the simultaneous display of multiple guidance information; in the case of congestion in the ETC lane, the lane congestion information will be displayed through the roadside guidance display screen to prompt subsequent vehicles to pass through other normal lanes.

7. The system according to claim 1, wherein: The quick release subsystem is used to receive vehicle tag information through the ETC lane antenna and match the free-flow transaction result corresponding to the vehicle tag information. If a successful free-flow transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received within the second preset time, the vehicle is directly released to pass by lifting the barrier. If a failed transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is received within the second preset time or if the free-flow transaction result corresponding to the vehicle tag information pushed by the ramp free-flow transaction subsystem is not received within the second preset time, the ETC transaction process is entered.

8. An intelligent induction method based on ramp free flow, characterized in that: The following steps are involved: Free-flow gantry transaction steps: After a vehicle enters the toll area, the gantry license plate recognition device installed on the ramp free-flow gantry automatically recognizes the license plate information and confirms the vehicle's identity based on the recognized license plate information, thereby triggering the corresponding free-flow transaction operation for the vehicle and pushing the free-flow transaction result to the toll network. If the free-flow transaction is successful, no guidance operation is performed; if the free-flow transaction fails, the gantry guidance display screen installed between the toll station and the ramp free-flow gantry is controlled to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane; Roadside guidance step: When a vehicle reaches the toll plaza entrance, the license plate information is automatically recognized by the roadside guidance license plate recognition equipment installed on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head. When a free-flow transaction failure result corresponding to the license plate is received from the toll network, the roadside guidance display screens installed on both sides of the toll plaza entrance between the ramp free-flow gantry and the island head are controlled to display a second guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane; Island head guidance step: When a vehicle reaches the island head, the license plate information is automatically recognized by the license plate recognition device installed at the island head position. When a free-flow transaction failure result corresponding to the license plate is received from the toll network, the island head guidance display screen installed at the island head position is controlled to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane; Lane quick release steps: When a vehicle arrives at the ETC lane, the vehicle tag information is automatically received through the ETC lane antenna, and the free-flow transaction result corresponding to the vehicle tag information is matched. When the free-flow transaction success result corresponding to the vehicle tag information is received from the toll network, the barrier is directly raised to release the vehicle to pass. When the free-flow transaction failure result corresponding to the vehicle tag information is received from the toll network or the free-flow transaction result corresponding to the vehicle tag information is not received from the toll network, the ETC transaction processing is entered.

9. The method according to claim 8, characterized in that In the free-flow gantry transaction step, when the free-flow transaction fails, first guidance information is intelligently planned and generated based on real-time traffic flow and congestion conditions in surrounding lanes, and the gantry guidance display screen is controlled to display the first guidance information in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane; In the roadside guidance step, when a result indicating a failed free-flow transaction corresponding to the license plate is received from the toll network, a second guidance message is intelligently planned and generated based on the traffic situation at the toll plaza entrance area at that time, and the roadside guidance display screen is controlled to display the second guidance message in real time, so as to intelligently guide the special-situation vehicle corresponding to the license plate to pass through the mixed lane; In the island head guidance step, when the free flow transaction failure result corresponding to the license plate is received from the toll network, the third guidance information is intelligently planned and generated based on the real-time traffic conditions around the island head, and then the island head guidance display screen is controlled to display the third guidance information in real time, so as to intelligently guide the special situation vehicle corresponding to the license plate to pass through the mixed lane.

10. The method according to claim 9, characterized in that The charging network communicates based on the UDP protocol to push messages about transaction results. All devices connected to the charging network are configured with an intranet IP. The communication message format is a json data packet. The message content includes the license plate number, license plate color, vehicle tag MAC address, vehicle tag contract serial number, card number, entry station, entry time, vehicle model, vehicle type, transaction time, amount, transaction result, failure reason, and transaction serial number. Each field in the message content has a clear type and length limit.

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