Key vehicle track restoration method and system

Abstract

The invention discloses a key vehicle track restoration method and system. The key vehicle track restoration method comprises the steps of obtaining a license plate and a color of a vehicle from an ETC door frame; obtaining static information from a high-speed intelligent management platform; obtaining dynamic information from the key operating vehicle dynamic information public exchange platform; vehicle tracks are updated regularly based on the key vehicle static information and dynamic information; the step of updating the key vehicle track comprises obtaining an actual pile number corresponding to the current time through a road pile coordinate table based on the longitude and latitude of the key vehicle; if the position of the key vehicle is not updated after the regular query time value, estimating an estimated stake number at the next moment based on the previous stake number, the real-time speed, the driving direction and the regular query time value; correcting the estimated stake number based on the actual stake number obtained at the next moment; and obtaining a key vehicle track based on the obtained stake number. The vehicle form track can be accurately given through combination of the static information and the dynamic information of the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of dust cleaning technology, and in particular to a method and system for restoring key vehicle tracks. Background Art

[0002] "Two passengers and one dangerous goods" include chartered vehicles for tourism, regular passenger buses of Class III or above, and special road vehicles for transporting dangerous chemicals, fireworks, and civilian explosives. Since this project is a full bridge, dynamic monitoring of "two passengers and one dangerous goods" is particularly important. The "two passengers and one dangerous goods" dynamic monitoring system uses data from the national key operating vehicle networking and joint control system to track hazardous chemical vehicles in an all-round or vehicle-by-vehicle manner to achieve accident warnings; it is linked to the off-site monitoring equipment of the highway. Once a vehicle is detected to be illegally parked or speeding, it can quickly call the surrounding high-definition cameras to view the on-site situation, reduce the risk of accidents involving hazardous chemical vehicles, achieve active traffic safety, improve the response speed of emergency rescue, and reduce casualties and economic losses caused by accidents.

[0003] With the elimination of provincial toll stations on national highways and the implementation of networked toll collection, a new "one network" operation pattern has been formed across the country, and the toll collection model has undergone major changes. Vehicle tolls will be converted from the original point-to-point fixed charges to charges based on actual driving trajectories, and the visual restoration of vehicle driving trajectories has also become a focus of attention for highway operators.

[0004] Since vehicle trajectory restoration needs to collect the number of vehicle entrances, gantry transaction data, gantry license plate recognition data, exit data, etc. generated during vehicle passage, the above data needs to have a fixed timeliness to eliminate the interference of data delay. At the same time, the longitude and latitude of the gantries and toll stations and related information need to be collected. In the actual generation environment, the gantry time jump phenomenon (clock asynchrony) may occur, and trajectory restoration is sorted by time, which will interfere with the trajectory restoration data. Summary of the invention

[0005] In view of the shortcomings existing in the above problems, the present invention provides a method and system for restoring key vehicle trajectories.

[0006] To achieve the above object, the present invention provides a method for restoring key vehicle trajectories, comprising:

[0007] Obtain the vehicle's license plate, license plate color and time from the ETC gantry;

[0008] Input the vehicle's license plate and license plate color into the highway smart management platform to obtain static information of key vehicles;

[0009] Input the vehicle identification code into the public exchange platform for dynamic information of key operating vehicles to obtain dynamic information, the dynamic information including the coordinate table of road stakes, real-time speed, driving direction, latitude and longitude of the vehicle and regular query time value;

[0010] Regularly updating the vehicle trajectory based on the static information and dynamic information of the key vehicles;

[0011] Wherein, updating the key vehicle trajectory includes:

[0012] Based on the latitude and longitude of the key vehicle, the actual stake number corresponding to the current time is obtained through the road stake coordinate table;

[0013] If the key vehicle position is not updated after the periodic query time value, the estimated stake number at the next moment is estimated based on the previous stake number, real-time speed, driving direction and the periodic query time value;

[0014] Correcting the estimated pile number based on the actual pile number obtained at the next moment;

[0015] The key vehicle trajectory is obtained based on the obtained stake number.

[0016] Preferably, the key vehicles are two passenger and one hazardous vehicle.

[0017] Preferably, the key vehicle static information includes vehicle status, vehicle type, issuing agency, road transport number, vehicle brand model, validity start and end dates, business scope, business operator information, name of person in charge, certificate status and transport type.

[0018] Preferably, only vehicles with yellow license plates are queried.

[0019] Preferably, the license plate that has not been queried on a set date is queried.

[0020] Preferably, the query is performed only after the ETC gantry detects a yellow license plate.

[0021] Preferably, the dynamic information also includes abnormal behaviors of key vehicles.

[0022] The present invention also provides a key vehicle trajectory restoration system, comprising:

[0023] ETC gantry module, used to obtain the vehicle's license plate, license plate color and time from the ETC gantry;

[0024] The static information acquisition module is used to input the vehicle license plate and license plate color into the highway intelligent management platform to obtain the static information of key vehicles;

[0025] A dynamic information acquisition module is used to input the vehicle identification code into the public exchange platform for dynamic information of key operating vehicles to obtain dynamic information, wherein the dynamic information includes a road stake coordinate table, real-time speed, driving direction, latitude and longitude of the vehicle, and regular query time value;

[0026] A trajectory updating module, used for regularly updating the vehicle trajectory based on the static information and dynamic information of the key vehicle;

[0027] Wherein, updating the key vehicle trajectory includes:

[0028] Based on the latitude and longitude of the key vehicle, the actual stake number corresponding to the current time is obtained through the road stake coordinate table;

[0029] If the key vehicle position is not updated after the periodic query time value, the estimated stake number at the next moment is estimated based on the previous stake number, real-time speed, driving direction and the periodic query time value;

[0030] Correcting the estimated pile number based on the actual pile number obtained at the next moment;

[0031] The key vehicle trajectory is obtained based on the obtained stake number.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention can accurately give the vehicle form trajectory by combining the static information and dynamic information of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flow chart of the key vehicle trajectory restoration method of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The following is combined with Figure 1 The present invention is further described in detail:

[0039] In this embodiment, the key vehicles are two passenger and one hazardous materials vehicles, which include chartered vehicles for tourism, regular passenger buses of Class 3 or above, and special road vehicles for transporting dangerous chemicals, fireworks and firecrackers, and civilian explosives.

[0040] Reference Figure 1 ,The present invention provides a key vehicle trajectory restoration method, including obtaining the vehicle's license plate, license plate color and time from the ETC gantry;

[0041] Specifically, the ETC gantry will take a snapshot of each passing vehicle. The way to determine whether a passing vehicle is a key vehicle is to query the license plate through the highway intelligent management platform. However, it is unrealistic to use the highway intelligent management platform to query in this way when the traffic volume is very large. The following screening work needs to be done: only query vehicles with yellow license plates; only query license plates that have not been queried recently (tentatively set to be one month). The queried vehicles (regardless of whether they are two passenger and one dangerous goods) will be stored in an independent public vehicle information database. When the same vehicle is detected again after a period of time, the data needs to be overwritten and updated.

[0042] Input the vehicle's license plate and license plate color into the highway smart management platform to obtain static information of key vehicles;

[0043] Specifically, the vehicle static information is detailed in Table 1.

[0044] Table 1

[0045]

[0046]

[0047] Input the vehicle identification code into the public exchange platform for dynamic information of key operating vehicles to obtain dynamic information, which includes the coordinate table of road stakes, real-time speed, driving direction, vehicle latitude and longitude, and regular query time value;

[0048] Specifically, the dynamic information is detailed in Table 2.

[0049] Table 2

[0050]

[0051]

[0052] Regularly update vehicle trajectories based on static and dynamic information of key vehicles;

[0053] Among them, updating key vehicle trajectories includes:

[0054] Based on the latitude and longitude of the key vehicle, the actual stake number corresponding to the current time is obtained through the road stake coordinate table;

[0055] If the key vehicle position is not updated after the periodic query time value, the estimated pile number at the next moment is estimated based on the previous pile number, real-time speed, driving direction and the periodic query time value;

[0056] The estimated pile number is corrected based on the actual pile number obtained at the next moment;

[0057] The key vehicle trajectory is obtained based on the obtained stake number.

[0058] Example

[0059] The essence of vehicle trajectory is the stake number, speed and driving direction of a license plate at different times. The following method of recording trajectory takes the interface 1.2 that is queried once every 5 seconds and the target vehicle is in the matched state as an example.

[0060] There are two situations when the target vehicle can be accurately located:

[0061] The vehicle's license plate is detected by the ETC gantry or high-definition camera;

[0062] Interface 1.2 updates the location of the vehicle (the location update time here is not 5 seconds, but uncertain, averaging about once a minute, that is, the vehicle may be queried several times and still be shown at the same location, and the timestamp is not updated).

[0063] The trajectory of the target vehicle starts from the first time it is detected by the device and is recorded after matching as shown in Table 3.

[0064] Table 3

[0065]

[0066] If the position of interface 1.2 is not updated after 5 seconds, its stake number is calculated by multiplying the speed by the time difference (the "estimate" field in this row is 1), see Table 4:

[0067] Table 4

[0068]

[0069]

[0070] If the position is updated by interface 1.2 after 5 seconds, the latitude and longitude provided by interface 1.2 shall be converted into the pile-by-pile coordinate table and the speed shall also be updated, see Table 5:

[0071]

[0072] If the ETC gantry or high-definition camera detects a target vehicle at any time, the current time and the equipment's stake number shall prevail (speed does not need to be adjusted), see Table 6:

[0073]

[0074] See Table 7 after correction:

[0075]

[0076]

[0077] In this embodiment, the pile number may be calculated according to the speed. For example, a vehicle is traveling in the Nansha direction of the main line (downward), and the point No. 20 in the track shows that it is at K18+50 at 13:01:40 (estimated), and theoretically the pile number at 13:01:45 should be smaller than K18+50.

[0078] In fact, interface 1.2 updated the position of the vehicle at 13:01:45, with the pile number K18+150, which is recorded in sequence number 21. It is possible that the vehicle decelerated, resulting in an incorrect estimate.

[0079] At this time, the trajectory should be corrected. Pay attention to the last column, find the second to last 0 (that is, serial number 18), and correct the pile numbers of serial numbers 19 and 20 according to the duration:

[0080] From serial number 18 to serial number 21, it moves from K18+450 to K18+150;

[0081] 300 meters is covered in 15 seconds, and the speed is 20m / s, or 72km / h. Change the speed of numbers 19 and 20 to this value;

[0082] According to the speed calculation, the pile numbers of sequence number 19 and sequence number 20 should be K18+350 and K18+250.

[0083] The present invention also provides a key vehicle trajectory restoration system, comprising:

[0084] ETC gantry module, used to obtain the vehicle's license plate, license plate color and time from the ETC gantry;

[0085] The static information acquisition module is used to input the vehicle license plate and license plate color into the highway intelligent management platform to obtain the static information of key vehicles;

[0086] A dynamic information acquisition module is used to input the vehicle identification code into the public exchange platform for dynamic information of key operating vehicles to obtain dynamic information, including a road stake coordinate table, real-time speed, driving direction, vehicle latitude and longitude, and regular query time values;

[0087] A trajectory update module, used to regularly update vehicle trajectories based on static and dynamic information of key vehicles;

[0088] Among them, updating key vehicle trajectories includes:

[0089] Based on the latitude and longitude of the key vehicle, the actual stake number corresponding to the current time is obtained through the road stake coordinate table;

[0090] If the key vehicle position is not updated after the periodic query time value, the estimated pile number at the next moment is estimated based on the previous pile number, real-time speed, driving direction and the periodic query time value;

[0091] The estimated pile number is corrected based on the actual pile number obtained at the next moment;

[0092] Based on the obtained stake number, the key vehicle trajectory screen is obtained.

[0093] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for restoring key vehicle trajectories, characterized in that: include: Obtain the vehicle's license plate, license plate color and time from the ETC gantry; Input the vehicle's license plate and license plate color into the highway smart management platform to obtain static information of key vehicles; Input the vehicle identification code into the public exchange platform for dynamic information of key operating vehicles to obtain dynamic information, the dynamic information including the coordinate table of road stakes, real-time speed, driving direction, latitude and longitude of the vehicle and regular query time value; Regularly updating the vehicle trajectory based on the static information and dynamic information of the key vehicles; Wherein, updating the key vehicle trajectory includes: Based on the latitude and longitude of the key vehicle, the actual stake number corresponding to the current time is obtained through the road stake coordinate table; If the key vehicle position is not updated after the periodic query time value, the estimated stake number at the next moment is estimated based on the previous stake number, real-time speed, driving direction and the periodic query time value; Correcting the estimated pile number based on the actual pile number obtained at the next moment; The key vehicle trajectory is obtained based on the obtained stake number.

2. The method for restoring the track of a key vehicle according to claim 1, characterized in that: The key vehicles mentioned are two passenger vehicles and one hazardous vehicle.

3. The method for restoring the track of a key vehicle according to claim 2, characterized in that: The key vehicle static information includes vehicle status, vehicle type, issuing agency, road transport number, vehicle brand model, validity start and end dates, business scope, business operator information, name of person in charge, certificate status and transport type.

4. The method for restoring the track of a key vehicle according to claim 3, characterized in that: Only vehicles with yellow license plates are queried.

5. The method for restoring the track of a key vehicle according to claim 4, characterized in that: A query is performed on the license plate that has not been queried on the set date.

6. The method for restoring the track of a key vehicle according to claim 5, characterized in that: The query will only be carried out after the ETC gantry detects a yellow license plate.

7. The method for restoring the track of a key vehicle according to claim 6, characterized in that: The dynamic information also includes abnormal behaviors of key vehicles.

8. A key vehicle trajectory restoration system, characterized in that: include: ETC gantry module, used to obtain the vehicle's license plate, license plate color and time from the ETC gantry; The static information acquisition module is used to input the vehicle license plate and license plate color into the highway intelligent management platform to obtain the static information of key vehicles; A dynamic information acquisition module is used to input the vehicle identification code into the public exchange platform for dynamic information of key operating vehicles to obtain dynamic information, wherein the dynamic information includes a road stake coordinate table, real-time speed, driving direction, latitude and longitude of the vehicle, and regular query time value; A trajectory updating module, used for regularly updating the vehicle trajectory based on the static information and dynamic information of the key vehicle; Wherein, updating the key vehicle trajectory includes: Based on the latitude and longitude of the key vehicle, the actual stake number corresponding to the current time is obtained through the road stake coordinate table; If the key vehicle position is not updated after the periodic query time value, the estimated stake number at the next moment is estimated based on the previous stake number, real-time speed, driving direction and the periodic query time value; Correcting the estimated pile number based on the actual pile number obtained at the next moment; The key vehicle trajectory is obtained based on the obtained stake number.

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