Motor vehicle high temporal-spatial resolution emission list calculation method and system

Abstract

The invention discloses a motor vehicle high temporal-spatial resolution emission list calculation method and system. The method comprises the following steps: firstly, according to traffic flow information data of a target gate, determining emission factors corresponding to motor vehicles passing through the target gate according to the traffic flow information data; then, according to the traffic flow information data, determining the total flow of motor vehicles passing through the target checkpoints, obtaining the total pollutant emission amount in the target time period and the road interval according to the emission factors corresponding to the motor vehicles, and traversing all checkpoints and all time periods of the target area; the total motor vehicle pollutant emission amount of all the road intervals in the target area at different moments is obtained; and finally, carrying out statistical analysis and display on the total emission amount of the motor vehicle pollutants in the target area. According to the method, the emission lists on all road networks in the selected area can be calculated, and the near-real-time motor vehicle emission list covered by the whole road network in the selected area is realized.

Description

Technical Field

[0001] The present invention relates to the field of traffic information technology, and in particular to a method and system for calculating a motor vehicle emission inventory with high temporal and spatial resolution. Background Art

[0002] In recent years, with the rapid development of my country's economy and the continuous improvement of urban roads and transportation facilities, the number of motor vehicles in my country has continued to grow. By the end of 2014, the number of motor vehicles in China reached 246 million. While the rapid growth of motor vehicle ownership has brought convenience to people's lives, it has also seriously affected the quality of environmental air, making the problem of motor vehicle pollution increasingly prominent. In 2014, the total amount of pollutants emitted by motor vehicles nationwide was 45.473 million tons, of which nitrogen oxides (NO X ) emissions were 6.277 million tons, hydrocarbons (HC) emissions were 4.284 million tons, carbon monoxide (CO) emissions were 34.337 million tons, and particulate matter (PM) emissions were 574,000 tons. Motor vehicle exhaust emissions have become the main source of urban air pollution in my country. Motor vehicles not only directly emit primary pollutants, but also directly emit NO X Precursors such as VOCs will undergo secondary reactions in the atmosphere to generate secondary particulate matter and photochemical smog. Therefore, motor vehicle pollution is an important cause of atmospheric haze and photochemical smog pollution. At the same time, since most motor vehicles travel in densely populated areas, exhaust emissions directly threaten people's health.

[0003] Regional transport emissions estimation is mainly based on two approaches: "top-down" and "bottom-up". The "top-down" approach is to first calculate emissions at the regional level based on regional statistical data, and then distribute them to the regional space based on different types of auxiliary data, such as population and land use data. The "bottom-up" approach is more accurate than the "top-down" approach. In the "bottom-up" approach, emissions are quantified at a more granular level, for example, point sources, road line sources, and then aggregated to the desired spatial resolution.

[0004] Activity data obtained based on the "top-down" and "bottom-up" methods include information such as road traffic volume or vehicle travel distance. Activity data are divided into static data and dynamic data. Static data: static data based on most vehicle activities, such as vehicle ownership, fuel consumption, vehicle registration and other information; dynamic data: with the development of smart cities, the availability of actual road monitoring data has been improved to a certain extent. Some studies involving actual measurement of single vehicle activity data have been conducted based on the global positioning system (GPS). Activity levels are then multiplied by emission factors to calculate emissions, and emission factors often use default values.

[0005] At present, motor vehicle emission inventories are generally calculated to the annual emission level, lacking temporal changes; and the estimation process is generally based on regions, cities or counties as spatial units, lacking the ability to characterize the temporal and spatial distribution of automobile emissions. It can only reflect the motor vehicle emission level of a city or region in total, and the spatial accuracy is not high. Summary of the invention

[0006] Based on this, the embodiments of the present application provide a method and system for calculating a motor vehicle emission inventory with high temporal and spatial resolution, which can calculate the emission inventory on all road networks in a selected area, and realize a near real-time motor vehicle emission inventory covering the entire road network in the selected area.

[0007] In a first aspect, a method for calculating a motor vehicle emission inventory with high temporal and spatial resolution is provided, the method comprising:

[0008] Obtaining traffic flow information data passing through the target checkpoint, and determining emission factors corresponding to motor vehicles passing through the target checkpoint according to the traffic flow information data; wherein the emission factors are used to characterize pollutant emission parameters of motor vehicles at different speed ranges under their corresponding emission standards;

[0009] Determine the total flow of motor vehicles passing through the target checkpoint according to the traffic flow information data, and obtain the total amount of pollutant emissions in the target time period and road section according to the emission factors corresponding to the motor vehicles, traverse all checkpoints and all time periods in the target area, and obtain the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times;

[0010] The total amount of motor vehicle pollutant emissions in all road sections in the target area at different times is displayed through statistical analysis of time intervals, checkpoint locations and motor vehicle types.

[0011] Optionally, the total flow rate of motor vehicles passing through the target checkpoint is determined according to the traffic flow information data, and the total amount of pollutant emissions in the target time period and road section is obtained according to the emission factors corresponding to the motor vehicles, including:

[0012] The total amount of motor vehicle pollutant emissions is determined according to the first formula, which specifically includes:

[0013]

[0014] Among them, E represents the total amount of motor vehicle pollutant emissions, v represents the type of motor vehicle, h represents the time interval of motor vehicle travel, l represents the road section interval of motor vehicle travel, p represents the type of pollutant, f represents the fuel type, y represents the age and emission standard of the motor vehicle, ER represents the comprehensive emission rate of the motor vehicle, and VP represents the motor vehicle flow rate.

[0015] Optionally, the emission rate in the first formula is determined by a second formula, and the second formula specifically includes:

[0016] ER f，p，v，y =EF f，p，v，y ·S l

[0017] Where EF is the emission factor at the corresponding speed, S l represents the average speed on the road section l, f represents the fuel type, p represents the type of pollutant, v represents the type of motor vehicle, and y represents the age and emission standard of the motor vehicle.

[0018] Optionally, the number of motor vehicles in the first formula is determined by a third formula, and the third formula specifically includes:

[0019] VP f，v，y =TV h，l，v ·VF f，v，y

[0020] Among them, TV represents the total number of motor vehicles passing through, VF represents the composition of different types of motor vehicles, including fuel type, emission standard and vehicle age, f represents fuel type, v represents motor vehicle type, y represents motor vehicle age and emission standard, h represents motor vehicle travel time interval, and l represents motor vehicle travel section interval.

[0021] Optionally, the total amount of motor vehicle pollutant emissions is also determined according to a fourth formula, which specifically includes:

[0022] E h，l，p，v =∑ f，y 10 -6 ·EF f，p，v，y ·L l TV h，l，v ·VF f，v，y

[0023] Among them, L l =S l h, E represents the total amount of motor vehicle pollutant emissions, v represents the type of motor vehicle, h represents the time interval of motor vehicle travel, l represents the road section interval of motor vehicle travel, p represents the type of pollutant, f represents the fuel type, y represents the age of the motor vehicle and the emission standard, EF represents the emission factor at the corresponding speed, S l It represents the average speed on the road section l, TV represents the total number of motor vehicles passing through, and VF represents the composition of different types of motor vehicles.

[0024] Optionally, before acquiring the traffic flow information data passing through the target checkpoint, the method further includes:

[0025] Obtaining the vehicle passing data of the target checkpoint; wherein the vehicle passing data includes the passing time, the vehicle license plate number and the passing speed;

[0026] Obtaining vehicle information in a motor vehicle information system through the motor vehicle license plate number; wherein the vehicle information at least includes emission standards, vehicle type, fuel type and vehicle age;

[0027] The acquired passing time, passing speed and vehicle information data are calculated and integrated to determine the traffic flow information data of the target checkpoint.

[0028] Optionally, the traffic flow information data includes vehicle model, fuel type, vehicle age and emission standard, driving speed and passing time.

[0029] Optionally, the pollutants specifically include CO, HC, NO X and PM 2.5 .

[0030] Optionally, the motor vehicles specifically include eight types of motor vehicles, including small passenger cars, taxis, buses, medium-sized passenger cars, large passenger cars, motorcycles, light trucks, and heavy trucks, and each type of motor vehicle has corresponding pollutant emission standards.

[0031] In a second aspect, a system for calculating a motor vehicle emission inventory with high temporal and spatial resolution is provided, the system comprising:

[0032] An emission factor determination module, used to obtain traffic flow information data passing through a target checkpoint, and determine the emission factor corresponding to the motor vehicle passing through the target checkpoint according to the traffic flow information data; wherein the emission factor is used to characterize the pollutant emission parameters of the motor vehicle at different speed ranges under its corresponding emission standard;

[0033] A motor vehicle emission calculation module is used to determine the total flow of motor vehicles passing through the target checkpoint according to the traffic flow information data, and obtain the total amount of pollutant emissions in the target time period and road section according to the emission factors corresponding to the motor vehicles, traverse all checkpoints and all time periods in the target area, and obtain the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times;

[0034] The emission inventory display module is used to display the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times through statistical analysis of time intervals, checkpoint locations, and motor vehicle types.

[0035] In the technical solution provided in the embodiment of the present application, traffic flow information data passing through the target checkpoint is first obtained, and the emission factors corresponding to the motor vehicles passing through the target checkpoint are determined based on the traffic flow information data; then the total flow rate of motor vehicles passing through the target checkpoint is determined based on the traffic flow information data, and the total amount of pollutant emissions in the target time period and road section is obtained based on the emission factors corresponding to the motor vehicles, and all checkpoints and all time periods in the target area are traversed to obtain the total amount of pollutant emissions from motor vehicles in all road sections in the target area at different times; finally, the total amount of pollutant emissions from motor vehicles in all road sections in the target area at different times is displayed through statistical analysis of time sections, checkpoint locations and motor vehicle types.

[0036] The beneficial effects brought about by the technical solution provided in the embodiments of the present application include at least: the emissions of motor vehicles are calculated based on dynamic traffic data resources combined with individual vehicle emission parameters, with an accuracy far higher than that of traditional emission inventories, and can better reflect the actual motor vehicle emissions situation; since the emissions of motor vehicles on different road sections are directly calculated, the spatial resolution of the obtained motor vehicle emission inventory is far higher than that of traditional emission inventories; the time resolution of the obtained motor vehicle emission inventory is far higher than that of traditional motor vehicle emission inventories based on the emission inventory calculated according to the traffic flow at different times, thereby realizing the quantification of fine-grained energy consumption and pollutant emissions of vehicles on the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0038] Figure 1 A flow chart of the steps for calculating a high spatiotemporal resolution emission inventory for a motor vehicle provided in an embodiment of the present application;

[0039] Figure 2 A technical roadmap for calculating motor vehicle emissions inventories with high spatiotemporal resolution is provided for the embodiments of this application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] In the description of the present invention, the terms "comprises", "has" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may also include other steps or units that are not explicitly listed but are inherent to these processes, methods, products or apparatuses, or steps or units added based on further optimization schemes conceived by the present invention.

[0042] At present, motor vehicle emission inventories are generally calculated to the annual emission level, lacking temporal changes; and the estimation process is generally based on regions, cities or counties as spatial units, lacking the ability to characterize the temporal and spatial distribution of automobile emissions. It can only reflect the motor vehicle emission level of a city or region in total, and the spatial accuracy is not high.

[0043] Static emission inventories often rely on population and economic grid data in the process of achieving the spatial distribution of high-resolution traffic inventories, which often introduces large uncertainty in the distribution of traffic line sources. In dynamic traffic parameters, only vehicle trajectories of some models (such as taxis, ride-hailing services, heavy trucks, diesel vehicles, and vehicles recorded by specific Internet software) and some types of roads can be captured. The actual emissions of motor vehicles are constantly changing, and the emission factors are significantly affected by the driving speed and the vehicle's own information (detailed information such as the specific fuel, age, and implementation standards of the vehicle). It is difficult to track the specific information of the vehicle during the calculation process to select emission factors in a targeted manner.

[0044] This application aims to solve the technical problems in the above-mentioned existing motor vehicle emission accounting system. The purpose of the present invention is to provide a calculation system for motor vehicle high temporal and spatial resolution emission inventory. It has the following characteristics: it can calculate the emissions of different types of motor vehicles, including light passenger cars, taxis, buses, medium passenger cars, large passenger cars, motorcycles, light trucks, and heavy trucks; it can calculate the emissions of different pollutants, including CO, HC, NO X and PM 2.5 ; It can calculate the emission inventory at different times in near real time, with a minimum time resolution of 5 minutes. It can calculate the emission inventory on all road networks in the selected area, and realize the near real-time motor vehicle emission inventory covering the entire road network in the selected area. For details, please refer to Figure 1 , which shows a flow chart of a method for calculating a motor vehicle emission inventory with high spatiotemporal resolution provided by an embodiment of the present application. The method may include the following steps:

[0045] Step 101, obtaining traffic flow information data passing through a target checkpoint, and determining emission factors corresponding to motor vehicles passing through the target checkpoint according to the traffic flow information data.

[0046] Among them, the emission factor is used to characterize the pollutant emission parameters of motor vehicles in different speed ranges under their corresponding emission standards.

[0047] In this step, the calculation of emission factor data is mainly realized. Specifically, this step determines the emission factor database of different pollutants of different types of motor vehicles; the emission factor data system includes 8 types of motor vehicles, including small passenger cars, taxis, buses, medium-sized passenger cars, large passenger cars, motorcycles, light trucks, and heavy trucks, with different emission standards (National 0, National I, National II, National III, National IV and National V, or National 0, National 1, National 2, National 3, National 4, National 5), CO, HC, NO in different speed ranges. X and PM 2.5 The emission factor database provided by the Motor Vehicle Monitoring Center of the Ministry of Environmental Protection is used. The following parameters are obtained from the traffic flow information data processing system: vehicle model v, fuel type f, vehicle age and emission standard y, driving speed s, passing time h, etc., and input into the emission factor data system to match the corresponding emission factor of the vehicle.

[0048] Step 102, determine the total flow of motor vehicles passing through the target checkpoint based on the traffic flow information data, and obtain the total amount of pollutant emissions in the target time period and road section based on the emission factors corresponding to the motor vehicles, traverse all checkpoints and all time periods in the target area, and obtain the total amount of pollutant emissions from motor vehicles in all road sections in the target area at different times.

[0049] In this step, the calculation of motor vehicle emissions is mainly achieved, specifically:

[0050] The motor vehicle emission calculation system uses traffic flow information data and motor vehicle emission factor information. First, it calculates the total flow rate VP of vehicles passing through the checkpoint, and calculates the travel distance l by combining the vehicle travel time h and the average travel speed S. Combined with the checkpoint position in the traffic flow information data, it calculates and generates the emission of different pollutants of different types of motor vehicles at different locations at the same time; from a transient and microscopic perspective, in a certain time period h, the pollutant emission of a certain type of vehicle on a road section l is equal to the product of the number of all vehicles of that type on the road and the emission rate of the motor vehicle at that moment and time. It can be expressed by the first formula, that is, formula (1):

[0051]

[0052] Among them, E represents the total amount of motor vehicle pollutant emissions (t), v represents the type of motor vehicle, including small passenger cars, taxis, buses, medium-sized passenger cars, large passenger cars, motorcycles, light trucks, and heavy trucks. h represents the time interval of motor vehicle travel (s), l represents the road section interval of motor vehicle travel (m), and p represents the type of pollutant, which includes CO, HC, NO X 、PM 2.5 , f represents the fuel type, which is divided into diesel and gasoline, y represents the age and emission standard of the motor vehicle, ER represents the comprehensive emission rate of the motor vehicle (g / s), and VP represents the motor vehicle flow (vehicles).

[0053] Among them, the emission rate and the number of motor vehicles can be expressed by the second formula and the third formula, namely, formula (2) and (3):

[0054] ER f，P，v，y =EF f，p，v，y ·S l (2)

[0055] Where EF is the emission factor at the corresponding speed (g / km), S l represents the average speed (km / s) on the road section l, f represents the fuel type, p represents the type of pollutant, v represents the type of motor vehicle, and y represents the age and emission standard of the motor vehicle.

[0056] VP f，v，y =TV h，l，v ·VF f，v，y (3)

[0057] Among them, TV represents the total number of motor vehicles passing through (vehicles), VF represents the composition of different types of motor vehicles, including fuel type, emission standards and vehicle age, including fuel type, emission standards and vehicle age, f represents fuel type, v represents motor vehicle type, y represents motor vehicle age and emission standards, h represents motor vehicle travel time interval, and l represents motor vehicle travel section interval.

[0058] Substituting equation (2) and equation (3) into equation (1), we can get equation (4):

[0059] E h，l，p，v =∑ f，y 10 -6 ·EF f，p，v，y ·S l ·h·TV h，l，v ·VF f，v，y (4)

[0060] And because:

[0061] L l =S l·h (5)

[0062] Therefore, formula (6), i.e. the fourth formula, can be used to calculate the pollutant emissions of different types of motor vehicles:

[0063] E h，l，p，v =∑ f，y 10 -6 ·EF f，p，v，y ·L l TV h，l，v ·VF f，v，y (6)

[0064] The parameters have the same meaning as above.

[0065] The pollutant emission calculation system uses formula (6) to calculate the emission amount, where TV h，l，v and VF f，v，y Derived from the traffic flow data processing system, EF f，p，v，y Derived from the Emission Factor Data System, L l The geographical location information is derived from the checkpoints. When calculating, different emission factor data are retrieved from the emission factor system in combination with the driving speed of different vehicles, and then the emission of different pollutants of different types of vehicles at different times on the road network is calculated.

[0066] In an optional embodiment of the present application, the road section also refers to a road section without checkpoints, that is, some minor roads or rural roads.

[0067] The total amount of pollutant emissions on the road section without checkpoints is estimated through traffic flow data. First, obtain the traffic flow data of the road section without checkpoints, including the total flow and speed of motor vehicles passing through the road section. Then, based on these data and the emission factor model, estimate the total amount of pollutant emissions on the road section. The emission factor model can be established based on the type and speed range of motor vehicles on the road section, as well as the corresponding emission standards. Based on the emission factor model and traffic flow data, the total amount of pollutant emissions on the road section can be estimated. Finally, the estimated total amount of pollutant emissions is added to the total amount of pollutant emissions that have been statistically obtained to obtain the total amount of motor vehicle pollutant emissions in all road sections of the complete target area at different times.

[0068] Step 103, the total amount of motor vehicle pollutant emissions in all road sections of the target area at different times is statistically analyzed and displayed by time interval, checkpoint location and motor vehicle type.

[0069] In this step, the emission inventory display is specifically implemented, that is, the emission of different pollutants from different types of motor vehicles at different locations at different times is statistically analyzed and displayed by category. The emission inventory display system is a motor vehicle emission analysis and display system that displays real-time emission inventories on road network maps. Users can choose emission inventory displays of different regional scales, different times, different pollutants, and different types of vehicles according to actual needs.

[0070] like Figure 2 , a technical roadmap for calculating the high spatiotemporal resolution emission inventory of motor vehicles in the above embodiment is given. In summary, it can be seen that this application estimates the emission factor based on the vehicle driving characteristics and technical attribute information (such as speed, acceleration, vehicle type, fuel type, emission standard, etc.), and uses the actual driving vehicle dynamic trajectory information as the motor vehicle emission activity level.

[0071] The present application also provides a motor vehicle high spatiotemporal resolution emission inventory calculation system. The system includes:

[0072] An emission factor determination module, used to obtain traffic flow information data passing through a target checkpoint, and determine the emission factor corresponding to the motor vehicle passing through the target checkpoint according to the traffic flow information data; wherein the emission factor is used to characterize the pollutant emission parameters of the motor vehicle at different speed ranges under its corresponding emission standard;

[0073] A motor vehicle emission calculation module is used to determine the total flow of motor vehicles passing through the target checkpoint according to the traffic flow information data, and obtain the total amount of pollutant emissions in the target time period and road section according to the emission factors corresponding to the motor vehicles, traverse all checkpoints and all time periods in the target area, and obtain the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times;

[0074] The emission inventory display module is used to display the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times through statistical analysis of time intervals, checkpoint locations, and motor vehicle types.

[0075] The motor vehicle high spatiotemporal resolution emission inventory calculation system provided in the embodiment of the present application is used to implement the above-mentioned motor vehicle high spatiotemporal resolution emission inventory calculation method. For the specific limitations of the motor vehicle high spatiotemporal resolution emission inventory calculation system, please refer to the limitations of the motor vehicle high spatiotemporal resolution emission inventory calculation method mentioned above, which will not be repeated here. Each part of the above-mentioned motor vehicle high spatiotemporal resolution emission inventory calculation system can be implemented in whole or in part through software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the device in the form of hardware, or can be stored in the memory in the device in the form of software, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0076] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for calculating motor vehicle emission inventories with high temporal and spatial resolution, It is characterized in that The method comprises: Obtaining traffic flow information data passing through the target checkpoint, and determining emission factors corresponding to motor vehicles passing through the target checkpoint according to the traffic flow information data; wherein the emission factors are used to characterize pollutant emission parameters of motor vehicles at different speed ranges under their corresponding emission standards; Determine the total flow of motor vehicles passing through the target checkpoint according to the traffic flow information data, and obtain the total amount of pollutant emissions in the target time period and road section according to the emission factors corresponding to the motor vehicles, traverse all checkpoints and all time periods in the target area, and obtain the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times; The total amount of motor vehicle pollutant emissions in all road sections in the target area at different times is displayed through statistical analysis of time intervals, checkpoint locations and motor vehicle types.

2. The method for calculating a high spatiotemporal resolution emission inventory of a motor vehicle according to claim 1, It is characterized in that The total flow of motor vehicles passing through the target checkpoint is determined according to the traffic flow information data, and the total amount of pollutant emissions in the target time period and road section is obtained according to the emission factors corresponding to the motor vehicles, including: The total amount of motor vehicle pollutant emissions is determined according to the first formula, which specifically includes: Among them, E represents the total amount of motor vehicle pollutant emissions, v represents the type of motor vehicle, h represents the time interval of motor vehicle travel, l represents the road section interval of motor vehicle travel, p represents the type of pollutant, f represents the fuel type, y represents the age and emission standard of the motor vehicle, ER represents the comprehensive emission rate of the motor vehicle, and VP represents the motor vehicle flow rate.

3. The method for calculating a motor vehicle emission inventory with high temporal and spatial resolution according to claim 2, It is characterized in that The emission rate in the first formula is determined by the second formula, which specifically includes: IS f，p，v，y =EU f，p，v，y ·S l Where EF is the emission factor at the corresponding speed, S l represents the average speed on the road section l, f represents the fuel type, p represents the type of pollutant, v represents the type of motor vehicle, and y represents the age and emission standard of the motor vehicle.

4. The method for calculating a motor vehicle emission inventory with high temporal and spatial resolution according to claim 2, It is characterized in that The number of motor vehicles in the first formula is determined by the third formula, which specifically includes: VP f，v，y =TV h，l，v ·VF f，v，y Among them, TV represents the total number of motor vehicles passing through, VF represents the composition of different types of motor vehicles, including fuel type, emission standard and vehicle age, f represents fuel type, v represents motor vehicle type, y represents motor vehicle age and emission standard, h represents motor vehicle travel time interval, and l represents motor vehicle travel section interval.

5. The method for calculating a motor vehicle emission inventory with high temporal and spatial resolution according to claim 1, It is characterized in that The total amount of motor vehicle pollutant emissions is also determined according to a fourth formula, which specifically includes: E h，l，p，v =∑ f，y 10 -6 ·EF f，p，v，y ·L l ·TV h，l，v ·VF f，v，y Among them, L l =S l h, E represents the total amount of motor vehicle pollutant emissions, v represents the type of motor vehicle, h represents the time interval of motor vehicle travel, l represents the road section interval of motor vehicle travel, p represents the type of pollutant, f represents the fuel type, y represents the age of the motor vehicle and the emission standard, EF represents the emission factor at the corresponding speed, S l It represents the average speed on the road section l, TV represents the total number of motor vehicles passing through, and VF represents the composition of different types of motor vehicles.

6. The method for calculating a motor vehicle emission inventory with high temporal and spatial resolution according to claim 1, It is characterized in that Before acquiring the traffic flow information data passing through the target checkpoint, the method further includes: Obtaining the vehicle passing data of the target checkpoint; wherein the vehicle passing data includes the passing time, the vehicle license plate number and the passing speed; Obtaining vehicle information in a motor vehicle information system through the motor vehicle license plate number; wherein the vehicle information at least includes emission standards, vehicle type, fuel type and vehicle age; The acquired passing time, passing speed and vehicle information data are calculated and integrated to determine the traffic flow information data of the target checkpoint.

7. The method for calculating a motor vehicle emission inventory with high temporal and spatial resolution according to claim 1, It is characterized in that The traffic flow information data includes vehicle model, fuel type, vehicle age and emission standard, driving speed and passing time.

8. The method for calculating a motor vehicle emission inventory with high temporal and spatial resolution according to claim 1, It is characterized in that The pollutants specifically include CO, HC, NO X and PM 2.5 .

9. The method for calculating a motor vehicle emission inventory with high spatiotemporal resolution according to claim 1, It is characterized in that The motor vehicles specifically include eight categories of motor vehicles, namely, small passenger cars, taxis, buses, medium-sized passenger cars, large passenger cars, motorcycles, light trucks, and heavy trucks. Each category of motor vehicle has corresponding pollutant emission standards.

10. A motor vehicle emission inventory calculation system with high temporal and spatial resolution, It is characterized in that The system comprises: An emission factor determination module, used to obtain traffic flow information data passing through a target checkpoint, and determine the emission factor corresponding to the motor vehicle passing through the target checkpoint according to the traffic flow information data; wherein the emission factor is used to characterize the pollutant emission parameters of the motor vehicle at different speed ranges under its corresponding emission standard; A motor vehicle emission calculation module is used to determine the total flow of motor vehicles passing through the target checkpoint according to the traffic flow information data, and obtain the total amount of pollutant emissions in the target time period and road section according to the emission factors corresponding to the motor vehicles, traverse all checkpoints and all time periods in the target area, and obtain the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times; The emission inventory display module is used to display the total amount of motor vehicle pollutant emissions in all road sections in the target area at different times through statistical analysis of time intervals, checkpoint locations, and motor vehicle types.

Images