A method and system for optimizing and controlling air quality in extra-long highway tunnels

Abstract

The present invention discloses a method and system for optimizing and controlling the air quality of a highway extra-long tunnel, which relates to the field of intelligent control technology. The key points of the technical solution are: establishing a concentration change curve and a displacement change curve; determining the contribution concentration of the real-time operating state in combination with a concentration reference value and a real-time vehicle speed; determining the contribution displacement of the real-time operating state in combination with a displacement reference value and a real-time vehicle flow; calculating the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period to obtain a maximum concentration estimation value and a displacement estimation value; and starting and stopping the ventilation equipment in the target tunnel according to the maximum concentration estimation value and the displacement estimation value. The present invention adaptively selects ventilation equipment and determines the working power of each ventilation equipment according to the maximum concentration estimation value and the displacement estimation value, which can effectively improve the working efficiency of tunnel air quality control and reduce the energy consumption of ventilation control in the tunnel.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and more specifically, to a method and system for optimizing and controlling air quality in a highway extra-long tunnel. Background Art

[0002] With the continuous development of economy, traffic roads are constantly being built in mountainous areas. In complex areas such as mountains and hills, high-grade highways can be built by building highway tunnels to overcome terrain restrictions and shorten driving distances, which has led to an increasing proportion of highway tunnels. For highway tunnels, especially long tunnels, in order to ensure the air quality inside the tunnel, it is necessary to ventilate emissions such as carbon monoxide and smoke emitted by vehicles, which leads to high energy consumption of the ventilation control system in the tunnel.

[0003] At present, the ventilation control method in highway tunnels mainly uses sensor equipment to detect the concentration of emissions in highway tunnels. When the detected concentration value exceeds the preset value, the fan in the highway tunnel is controlled to start running; or, a certain number of fans in the highway tunnel are directly controlled to start running according to the detected concentration value. However, under the influence of the operating conditions of different vehicle speeds and traffic volumes, not only the emission concentration in the highway tunnel varies greatly, but also the emission concentration distribution in various parts of the highway tunnel varies greatly, which leads to poor ventilation effect of multiple ventilation fans in different locations running synchronously; in addition, affected by the free diffusion of emissions, it is not meaningful to ventilate low-concentration emissions; in addition, in order to obtain the detailed distribution of emissions in the highway tunnel, multiple sensor devices need to be arranged along the extension direction of the highway tunnel, which not only has high requirements on network communication performance, but also has high actual operating costs.

[0004] Therefore, how to study and design a method and system for optimizing and controlling the air quality in extra-long highway tunnels that can overcome the above-mentioned defects is a problem that we urgently need to solve. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a method and system for optimizing and controlling the air quality in an extra-long highway tunnel. The present invention adaptively selects ventilation equipment and determines the working power of each ventilation equipment based on the maximum concentration estimation value and the displacement estimation value, which can effectively improve the working efficiency of tunnel air quality control and reduce the energy consumption of ventilation control in the tunnel.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] In a first aspect, a method for optimizing and controlling air quality in a highway extra-long tunnel is provided, comprising the following steps:

[0008] Simulate and analyze the maximum concentration value and the displacement value corresponding to the maximum concentration value of the index items in the target tunnel under various operating conditions where the traffic volume and speed change synchronously, and establish the concentration change curve and the displacement change curve;

[0009] Collect the real-time operation status in the target tunnel, including real-time traffic flow and real-time vehicle speed;

[0010] The concentration reference value is obtained by matching the concentration change curve according to the real-time vehicle flow, and the contribution concentration of the real-time operating state is determined by combining the concentration reference value and the real-time vehicle speed;

[0011] The displacement reference value is obtained by matching the displacement change curve according to the real-time vehicle speed, and the contribution displacement of the real-time operating state is determined by combining the displacement reference value and the real-time vehicle flow;

[0012] The acquisition calculus algorithm calculates the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period, and obtains the maximum concentration estimation value of the indicator item within the preset period and the displacement estimation value corresponding to the maximum concentration estimation value;

[0013] The ventilation equipment in the target tunnel is started and stopped according to the maximum concentration estimate and displacement estimate.

[0014] Furthermore, the establishment process of the concentration change curve and the displacement change curve is specifically as follows:

[0015] The critical value of vehicle flow and the critical value of vehicle speed are determined by simulating when the maximum concentration value of the indicator item is at the midpoint of the target tunnel and the maximum concentration value of the indicator item reaches the control threshold;

[0016] According to the critical value of vehicle flow, the upper limit of vehicle flow, the critical value of vehicle speed and the upper limit of vehicle speed, the change quantity of synchronous change of vehicle flow and vehicle speed is determined, and multiple operation states are constructed;

[0017] Simulate and analyze the target tunnel for a preset period of continuous operation under a single operation state, and determine the maximum concentration value of the indicator item in the target tunnel and the displacement value corresponding to the maximum concentration value;

[0018] The maximum concentration values ​​of the indicator items under various operating conditions are interpolated and fitted to obtain a concentration change curve, and the displacement change curve is obtained by interpolating and fitting the displacement values ​​corresponding to the maximum concentration values ​​under various operating conditions.

[0019] Furthermore, the formula for calculating the change amount of the synchronous change of the vehicle flow and vehicle speed is specifically:

[0020]

[0021]

[0022] Wherein, k1 represents the step length of vehicle speed change; k2 represents the step length of vehicle flow change; m represents the number of changes in vehicle flow and vehicle speed; m, k1, k2 are all positive integers; V0 represents the critical value of vehicle speed; V max Indicates the upper speed limit; Indicates the critical value of traffic flow; Indicates the upper limit of traffic flow.

[0023] Furthermore, the vehicle flow rate in the operating state corresponding to the concentration reference value is the same as the real-time vehicle flow rate;

[0024] And / or, the vehicle speed of the operating state corresponding to the displacement reference value is the same as the real-time vehicle speed.

[0025] Furthermore, the calculation formula for the contribution concentration of the real-time operating state is specifically:

[0026]

[0027] Where ΔC represents the contribution concentration of the real-time operating state; C b represents the concentration reference value; P(·) represents the mapping function between the emission of the index item and the vehicle speed; T represents the preset period; V s Indicates the real-time vehicle speed; V b Indicates the vehicle speed of the operating state corresponding to the concentration reference value.

[0028] Furthermore, the contribution displacement calculation formula of the real-time operating state is specifically:

[0029]

[0030] Where ΔX represents the contribution displacement of the real-time operating state; X b represents the displacement reference value; T represents the preset period; Indicates real-time traffic flow; Indicates the vehicle flow rate of the operating status corresponding to the displacement reference value.

[0031] Furthermore, the process of starting and stopping the ventilation equipment in the target tunnel according to the maximum concentration estimation value and the displacement estimation value is specifically as follows:

[0032] When the maximum concentration estimate is greater than or equal to the control threshold, the total power of ventilation control in the target tunnel is determined according to the maximum concentration estimate, and the total power of ventilation control is positively correlated with the maximum concentration estimate;

[0033] Determine a determined position of a maximum concentration estimation value in a target tunnel according to a displacement estimation value, wherein the displacement estimation value is a distance of the maximum concentration estimation value from a midpoint of the target tunnel, and the maximum concentration estimation value is located on a side of the midpoint of the target tunnel facing a direction in which the vehicle exits;

[0034] Screen out ventilation equipment whose distance from the determined position is less than a preset distance as the starting equipment;

[0035] The total power of ventilation control is distributed according to the ratio of the distance between each starting device and the determined position to obtain the distributed power of each starting device;

[0036] The air in the target tunnel is ventilated and controlled according to the allocated power of each starting device.

[0037] In the second aspect, a highway extra-long tunnel air quality optimization and control system is provided, comprising:

[0038] A simulation analysis module is used to simulate and analyze the maximum concentration value and the displacement value corresponding to the maximum concentration value of the index item in the target tunnel under various operating conditions where the traffic volume and speed change synchronously, and establish a concentration change curve and a displacement change curve;

[0039] A data collection module is used to collect the real-time operation status in the target tunnel, including the real-time traffic flow and real-time vehicle speed;

[0040] The concentration analysis module is used to obtain a concentration reference value from the concentration change curve according to the real-time vehicle flow, and determine the contribution concentration of the real-time operating state by combining the concentration reference value and the real-time vehicle speed;

[0041] The displacement analysis module is used to match the displacement reference value from the displacement change curve according to the real-time vehicle speed, and determine the contribution displacement of the real-time operating state by combining the displacement reference value and the real-time vehicle flow;

[0042] The estimation and analysis module is used to collect the calculus algorithm to calculate the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period, and obtain the maximum concentration estimation value of the indicator item within the preset period and the displacement estimation value corresponding to the maximum concentration estimation value;

[0043] The optimization control module is used to start and stop the ventilation equipment in the target tunnel according to the maximum concentration estimation value and the displacement estimation value.

[0044] In a third aspect, a computer terminal is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for optimizing and controlling the air quality in a highway extra-long tunnel as described in any one of the first aspects is implemented.

[0045] In a fourth aspect, a computer-readable medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement a method for optimizing and controlling the air quality in a highway extra-long tunnel as described in any one of the first aspects.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. The present invention provides a method for optimizing and controlling the air quality of a highway extra-long tunnel. It only simulates and analyzes a variety of operating states in which the vehicle flow and vehicle speed change synchronously. It can expand and analyze the changes of index items under other operating states based on the established concentration change curve and displacement change curve, and collects a calculus algorithm to calculate the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period. It can obtain the maximum concentration estimation value of the index item within the preset period and the displacement estimation value corresponding to the maximum concentration estimation value without the need for sensor equipment, and can adapt to complex and changeable operating states. In addition, the present invention adaptively selects ventilation equipment and determines the working power of each ventilation equipment based on the maximum concentration estimation value and the displacement estimation value, which can effectively improve the working efficiency of tunnel air quality control and reduce the energy consumption of ventilation control in the tunnel.

[0048] 2. When establishing the concentration change curve and the displacement change curve, the present invention determines the number of changes in the synchronous changes of the vehicle flow and the vehicle speed according to the vehicle flow critical value, the vehicle flow upper limit value, the vehicle speed critical value and the vehicle speed upper limit value, so that the concentration change curve and the displacement change curve can cover all possible operating states more evenly, ensuring the stability and reliability of the contribution concentration and contribution displacement analysis;

[0049] 3. When analyzing the contribution concentration, the present invention takes into account that the concentration of the index item is positively correlated with the vehicle speed when the vehicle flow is consistent, so the vehicle flow in the operating state corresponding to the reference value is the same as the real-time vehicle flow, and the contribution concentration in the real-time operating state can be estimated through the contribution concentration calculation formula without the need for complex theoretical analysis;

[0050] 4. When analyzing the contribution displacement, the present invention takes into account that the forward position of the maximum concentration of the index item is positively correlated with the vehicle flow rate when the vehicle speed is consistent, so the vehicle speed of the running state corresponding to the displacement reference value is the same as the real-time vehicle speed, and the contribution displacement of the real-time running state can be estimated through the contribution displacement calculation formula, without the need for complex theoretical analysis;

[0051] 5. The present invention distributes the total power of ventilation control according to the ratio of the distance between each starting device and the determined position, which can flexibly control the start and stop and operating time of each ventilation device, effectively reducing the energy consumption of highway tunnel ventilation control. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0053] Figure 1is a flow chart of Embodiment 1 of the present invention;

[0054] Figure 2 It is a system block diagram in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0055] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0056] Example 1: A method for optimizing and controlling air quality in a highway extra-long tunnel, such as Figure 1 As shown, the following steps are included:

[0057] S1: Simulate and analyze the maximum concentration value and the displacement value corresponding to the maximum concentration value of the index items in the target tunnel under various operating conditions where the traffic volume and speed change synchronously, and establish a concentration change curve and a displacement change curve;

[0058] S2: Collect the real-time operation status in the target tunnel, including real-time traffic flow and real-time vehicle speed;

[0059] S3: obtaining a concentration reference value from the concentration change curve according to the real-time vehicle flow, and determining the contribution concentration of the real-time operating state by combining the concentration reference value and the real-time vehicle speed;

[0060] S4: obtaining a displacement reference value from the displacement change curve according to the real-time vehicle speed, and determining the contribution displacement of the real-time operating state by combining the displacement reference value and the real-time vehicle flow;

[0061] S5: Calculate the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period by using a collection calculus algorithm, and obtain the maximum concentration estimation value of the indicator item within the preset period and the displacement estimation value corresponding to the maximum concentration estimation value;

[0062] S6: Start and stop the ventilation equipment in the target tunnel according to the maximum concentration estimation value and the displacement estimation value.

[0063] The displacement value corresponding to the maximum concentration value recorded in the present invention is the distance that the maximum concentration value deviates from the midpoint position of the target tunnel. The acquisition of the real-time operation status can be achieved by using image recognition technology, which is not limited here.

[0064] The establishment process of the concentration change curve and the displacement change curve is as follows: the maximum concentration value of the indicator item is at the midpoint of the target tunnel and the maximum concentration value of the indicator item reaches the control threshold to simulate and determine the critical value of the traffic flow and the critical value of the vehicle speed; the number of changes in the synchronous changes of the traffic flow and the vehicle speed is determined according to the critical value of the traffic flow, the upper limit of the traffic flow, the critical value of the vehicle speed and the upper limit of the vehicle speed, and a variety of operating states are constructed; the target tunnel is simulated and analyzed to continuously operate for a preset period under a single operating state, and the maximum concentration value of the indicator item in the target tunnel and the displacement value corresponding to the maximum concentration value are determined; the maximum concentration values ​​of the indicator items under various operating states are interpolated and fitted to obtain the concentration change curve, and the displacement change curve is interpolated and fitted to obtain the displacement value corresponding to the maximum concentration value under various operating states.

[0065] The specific calculation formula for the change quantity of synchronous changes in traffic flow and vehicle speed is:

[0066]

[0067]

[0068] Wherein, k1 represents the step length of vehicle speed change; k2 represents the step length of vehicle flow change; m represents the number of changes in vehicle flow and vehicle speed; m, k1, k2 are all positive integers; V0 represents the critical value of vehicle speed; V max Indicates the upper speed limit; Indicates the critical value of traffic flow; Indicates the upper limit of traffic flow.

[0069] For example, when the determined vehicle speed critical value is 30km / h and the vehicle speed upper limit value is 80km / h; and the vehicle flow critical value is 15 vehicles / min and the vehicle flow upper limit value is 60 vehicles / min, then the solution is that m can take values ​​of 1, 2, or 5. Generally, m takes the maximum value, so the various operating states are: (30km / h, 15 vehicles / min), (40km / h, 24 vehicles / min), (50km / h, 33 vehicles / min), (60km / h, 42 vehicles / min), (70km / h, 51 vehicles / min), and (80km / h, 60 vehicles / min). The situation below the vehicle speed critical value and the vehicle flow critical value is not considered. When the corresponding reference situation cannot be matched from the concentration change curve or the displacement change curve based on the real-time vehicle flow, it is directly deemed that the ventilation equipment does not need to be started.

[0070] In addition, the maximum concentration value of the index item obtained by the above fitting and the displacement value corresponding to the maximum concentration value are both discrete points. After interpolation fitting, a curve composed of continuous points can be obtained, so the movement state between the critical value and the upper limit value can be matched successfully.

[0071] It should be noted that the vehicle flow rate in the operating state corresponding to the concentration reference value is the same as the real-time vehicle flow rate; and the vehicle speed in the operating state corresponding to the displacement reference value is the same as the real-time vehicle speed.

[0072] In this embodiment, the calculation formula of the contribution concentration of the real-time operation state is specifically:

[0073]

[0074] Where ΔC represents the contribution concentration of the real-time operating state; C b represents the concentration reference value; P(·) represents the mapping function between the emission of the index item and the vehicle speed; T represents the preset period; V s Indicates the real-time vehicle speed; V b Indicates the vehicle speed of the operating state corresponding to the concentration reference value.

[0075] In this embodiment, the contribution displacement calculation formula of the real-time operating state is specifically:

[0076]

[0077] Where ΔX represents the contribution displacement of the real-time operating state; X b represents the displacement reference value; T represents the preset period; Indicates real-time traffic flow; Indicates the vehicle flow rate of the operating status corresponding to the displacement reference value.

[0078] As an optional implementation, the process of starting and stopping the ventilation equipment in the target tunnel based on the maximum concentration estimate and the displacement estimate is as follows: when the maximum concentration estimate is greater than or equal to the control threshold, the total power of the ventilation control in the target tunnel is determined based on the maximum concentration estimate, and the total power of the ventilation control is positively correlated with the maximum concentration estimate; the determined position of the maximum concentration estimate in the target tunnel is determined based on the displacement estimate, the displacement estimate is the distance from the maximum concentration estimate to the midpoint of the target tunnel, and the maximum concentration estimate is located on the side of the midpoint of the target tunnel facing the direction of vehicle exit; the ventilation equipment whose distance from the determined position is less than a preset distance is selected as the starting equipment; the total power of the ventilation control is distributed according to the ratio of the distance between each starting equipment and the determined position to obtain the distributed power of each starting equipment; the air in the target tunnel is ventilated and controlled based on the distributed power of each starting equipment.

[0079] As another optional implementation, power values ​​of different gradients may be pre-set according to the distance, and the relevant power values ​​may be directly matched according to the distance between each starting device and the determined position.

[0080] Embodiment 2: A system for optimizing and controlling air quality in a long highway tunnel, the system is used to implement a method for optimizing and controlling air quality in a long highway tunnel as described in Embodiment 1, such as Figure 2 As shown, it includes a simulation analysis module, a data acquisition module, a concentration analysis module, a displacement analysis module, an estimation analysis module and an optimization control module.

[0081] Among them, the simulation analysis module is used to simulate and analyze the maximum concentration value and the displacement value corresponding to the maximum concentration value of the indicator item in the target tunnel under various operating conditions where the traffic flow and the speed change synchronously, and establish a concentration change curve and a displacement change curve; the data acquisition module is used to collect the real-time operating status in the target tunnel, and the real-time operating status includes the real-time traffic flow and the real-time speed; the concentration analysis module is used to match the concentration reference value from the concentration change curve according to the real-time traffic flow, and determine the contribution concentration of the real-time operating status in combination with the concentration reference value and the real-time speed; the displacement analysis module is used to match the displacement reference value from the displacement change curve according to the real-time speed, and determine the contribution displacement of the real-time operating status in combination with the displacement reference value and the real-time traffic flow; the estimation analysis module is used to collect the calculus algorithm to calculate the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period, and obtain the maximum concentration estimation value of the indicator item within the preset period and the displacement estimation value corresponding to the maximum concentration estimation value; the optimization control module is used to start and stop the ventilation equipment in the target tunnel according to the maximum concentration estimation value and the displacement estimation value.

[0082] Working principle: The present invention only simulates and analyzes various operating states in which vehicle flow and vehicle speed change synchronously, and can expand the analysis of changes in index items under other operating states based on the established concentration change curve and displacement change curve, and collects calculus algorithms to calculate the sum of contribution concentrations and the sum of contribution displacements of multiple real-time operating states within a preset period. It can obtain the maximum concentration estimate value of the index item within the preset period and the displacement estimate value corresponding to the maximum concentration estimate value without the need for sensor equipment, and can adapt to complex and changeable operating states; in addition, the present invention adaptively selects ventilation equipment and determines the working power of each ventilation equipment based on the maximum concentration estimate value and the displacement estimate value, which can effectively improve the work efficiency of tunnel air quality control and reduce the energy consumption of ventilation control in the tunnel.

[0083] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0084] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0085] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0086] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0087] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for optimizing and controlling air quality in a long highway tunnel, characterized in that: The following steps are involved: Simulate and analyze the maximum concentration value and the displacement value corresponding to the maximum concentration value of the index items in the target tunnel under various operating conditions where the traffic volume and speed change synchronously, and establish the concentration change curve and the displacement change curve; Collect the real-time operation status in the target tunnel, including real-time traffic flow and real-time vehicle speed; The concentration reference value is obtained by matching the concentration change curve according to the real-time vehicle flow, and the contribution concentration of the real-time operating state is determined by combining the concentration reference value and the real-time vehicle speed; The displacement reference value is obtained by matching the displacement change curve according to the real-time vehicle speed, and the contribution displacement of the real-time operating state is determined by combining the displacement reference value and the real-time vehicle flow; The acquisition calculus algorithm calculates the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period, and obtains the maximum concentration estimation value of the indicator item within the preset period and the displacement estimation value corresponding to the maximum concentration estimation value; Start and stop the ventilation equipment in the target tunnel according to the estimated value of maximum concentration and displacement; The establishment process of the concentration change curve and the displacement change curve is specifically as follows: The critical value of vehicle flow and the critical value of vehicle speed are determined by simulating when the maximum concentration value of the indicator item is at the midpoint of the target tunnel and the maximum concentration value of the indicator item reaches the control threshold; According to the critical value of vehicle flow, the upper limit of vehicle flow, the critical value of vehicle speed and the upper limit of vehicle speed, the change quantity of synchronous change of vehicle flow and vehicle speed is determined, and multiple operation states are constructed; Simulate and analyze the target tunnel for a preset period of continuous operation under a single operation state, and determine the maximum concentration value of the indicator item in the target tunnel and the displacement value corresponding to the maximum concentration value; The maximum concentration values ​​of the indicator items under various operating conditions are interpolated and fitted to obtain a concentration change curve, and the displacement values ​​corresponding to the maximum concentration values ​​under various operating conditions are interpolated and fitted to obtain a displacement change curve; The specific calculation formula for the change amount of the synchronous change of vehicle flow and vehicle speed is: Wherein, k1 represents the step length of vehicle speed change; k2 represents the step length of vehicle flow change; m represents the number of changes in vehicle flow and vehicle speed synchronously; m, k1, k2 are all positive integers; V0 represents the critical value of vehicle speed; Vmax represents the upper limit of vehicle speed; Indicates the critical value of traffic flow; Indicates the upper limit of traffic flow; The specific calculation formula of the contribution concentration of the real-time operation state is: Wherein, ΔC represents the contribution concentration of the real-time operating state; Cb represents the concentration reference value; P(·) represents the mapping function between the emission of the index item and the vehicle speed; T represents the preset period; Vs represents the real-time vehicle speed; Vb represents the vehicle speed of the operating state corresponding to the concentration reference value; The specific calculation formula of the contribution displacement of the real-time operation state is: Wherein, ΔX represents the contribution displacement of the real-time operation state; Xb represents the displacement reference value; T represents the preset period; Indicates real-time traffic flow; Indicates the vehicle flow rate of the operating status corresponding to the displacement reference value.

2. The method for optimizing and controlling air quality in a highway extra-long tunnel according to claim 1 is characterized in that: The vehicle flow rate in the operating state corresponding to the concentration reference value is the same as the real-time vehicle flow rate; And / or, the vehicle speed of the operating state corresponding to the displacement reference value is the same as the real-time vehicle speed.

3. The method for optimizing and controlling air quality in a highway extra-long tunnel according to claim 1 is characterized in that: The process of starting and stopping the ventilation equipment in the target tunnel according to the maximum concentration estimation value and the displacement estimation value is specifically as follows: When the maximum concentration estimate is greater than or equal to the control threshold, the total power of ventilation control in the target tunnel is determined according to the maximum concentration estimate, and the total power of ventilation control is positively correlated with the maximum concentration estimate; Determine a position of a maximum concentration estimate value in a target tunnel according to a displacement estimate value, wherein the displacement estimate value is a distance of the maximum concentration estimate value from a midpoint of the target tunnel, and the maximum concentration estimate value is located on a side of the midpoint of the target tunnel facing a direction in which the vehicle exits; Screen out ventilation equipment whose distance from the determined position is less than a preset distance as the starting equipment; The total power of ventilation control is distributed according to the ratio of the distance between each starting device and the determined position to obtain the distributed power of each starting device; The air in the target tunnel is ventilated and controlled according to the allocated power of each starting device.

4. A highway extra-long tunnel air quality optimization and control system, characterized in that: The system is used to implement a method for optimizing and controlling air quality in a highway extra-long tunnel as described in any one of claims 1 to 3, comprising: A simulation analysis module is used to simulate and analyze the maximum concentration value and the displacement value corresponding to the maximum concentration value of the index item in the target tunnel under various operating conditions where the traffic volume and speed change synchronously, and establish a concentration change curve and a displacement change curve; A data collection module is used to collect the real-time operation status in the target tunnel, including the real-time traffic flow and real-time vehicle speed; The concentration analysis module is used to obtain a concentration reference value from the concentration change curve according to the real-time vehicle flow, and determine the contribution concentration of the real-time operating state by combining the concentration reference value and the real-time vehicle speed; The displacement analysis module is used to match the displacement reference value from the displacement change curve according to the real-time vehicle speed, and determine the contribution displacement of the real-time operating state by combining the displacement reference value and the real-time vehicle flow; The estimation and analysis module is used to collect the calculus algorithm to calculate the sum of the contribution concentrations and the sum of the contribution displacements of multiple real-time operating states within a preset period, and obtain the maximum concentration estimation value of the indicator item within the preset period and the displacement estimation value corresponding to the maximum concentration estimation value; The optimization control module is used to start and stop the ventilation equipment in the target tunnel according to the maximum concentration estimation value and the displacement estimation value.

5. A computer terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for optimizing and controlling air quality in a highway extra-long tunnel as described in any one of claims 1 to 3 is implemented.

6. A computer readable medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement a method for optimizing and controlling air quality in a highway extra-long tunnel as described in any one of claims 1 to 3.

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