CN113313080A - Dynamic monitoring method, equipment and system for motor vehicle emission - Google Patents
Dynamic monitoring method, equipment and system for motor vehicle emission Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/41—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
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- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
Abstract
The invention relates to a dynamic monitoring method, equipment and a system for motor vehicle emission, wherein the monitoring method comprises the following steps: s1, acquiring detection information of the motor vehicle tail gas pollutants in the first measurement area and corresponding trigger time t1Vehicle snapshot information of each lane and corresponding trigger time t n2‑(ii) a S2, judging triggering time t corresponding to vehicle snapshot information of the lane n2‑And a trigger time t1Whether the difference value between the first preset interval and the second preset interval is within a first preset interval or not; if yes, go to step S3; if not, discarding the corresponding information; s3, judging whether the difference value between the trigger times corresponding to the vehicle snapshot information of different lanes is within a second preset interval or not; if yes, the parallel vehicles exist, and corresponding information is discarded; if not, go to step S4; s4, removing pollutants from motor vehicle exhaustThe detection information is associated with the vehicle snapshot information according to the identifier. The invention avoids the problems of missed shooting, false detection and the like when multiple lanes pass in parallel and improves the accuracy of information association.
Description
Technical Field
The invention belongs to the technical field of motor vehicle emission monitoring, and particularly relates to a method, equipment and a system for dynamically monitoring motor vehicle emission.
Background
Mobile pollution sources such as automobiles and the like become important sources of air pollution, and pollutants such as nitrogen oxides, particulate matters, hydrocarbons and the like emitted by the mobile pollution sources are important causes of pollution caused by fine particulate matters and photochemical smog. The traditional supervision modes of the motor vehicle exhaust emission are mainly annual inspection and road inspection, but the traditional means can not meet the requirement of high-efficiency supervision of the motor vehicle exhaust.
The existing on-line monitoring equipment comprises a motor vehicle exhaust remote sensing monitor and a black smoke vehicle remote sensing instrument, and usually an auxiliary road camera unit is used for associating image or video information of a motor vehicle with motor vehicle exhaust emission information of the on-line monitoring equipment, for example, a motor vehicle exhaust information processing method, a device, a system, a terminal and a storage medium disclosed in patent document with publication number CN 110598031A. The traditional association method adopts time sequence association of acquiring tail gas emission information and a target image, but in the actual use process, misdetection and missing detection caused by association errors are caused by the following factors:
(1) the road camera unit has delay time, and association errors can be caused according to the sequence of the queues;
(2) the motor vehicle has lane change condition in road running, and association errors can be caused according to the sequence of the queues;
(3) the problems of missed shooting, false detection and the like exist when multiple lanes pass in parallel, and accurate data cannot be associated.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a dynamic monitoring method, device and system for vehicle emissions that meets one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dynamic monitoring method for motor vehicle emissions, comprising the steps of:
s1, acquiring detection information of the motor vehicle tail gas pollutants in the first measurement area and corresponding trigger time t1Vehicle snapshot information of each lane and corresponding trigger time t n2-，nSequentially taking values as integers between 1 and N, wherein N is the total number of lanes in the first measuring area;
s2, judging triggering time t corresponding to vehicle snapshot information of the lane n2-And a trigger time t1Whether the difference value between the first preset interval and the second preset interval is within a first preset interval or not; if yes, go to step S3; if not, discarding the vehicle snapshot information of the corresponding lane;
s3, judging whether the difference value between the trigger times corresponding to the vehicle snapshot information of different lanes is within a second preset interval or not; if so, the vehicles running in parallel exist, and vehicle snapshot information of the corresponding lane is discarded; if not, go to step S4;
s4, the detection information of the motor vehicle exhaust pollutants is associated with the vehicle snapshot information according to the identifier, and the identifier is the lane and the corresponding trigger time t n2-。
Preferably, the method for dynamically monitoring the emission of the motor vehicle further comprises the following steps:
s5, black smoke emission detection information of each lane in the first measurement area and corresponding trigger time t thereof are obtained n3-；
S6, judging trigger time t corresponding to the same lane n2-And a trigger time t n3-Whether the difference value between the first preset interval and the second preset interval is within a third preset interval or not; if yes, go to step S7; if it isIf not, discarding vehicle snapshot information and black smoke emission detection information of the corresponding lane;
s7, associating the black smoke emission detection information of the corresponding lane according to the identifier;
s8, according to the trigger time t in the identifier n2-And associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information and the black smoke emission detection information.
Preferably, the method for dynamically monitoring the emission of the motor vehicle further comprises the following steps:
s5, black smoke emission detection information of each lane in the second measurement area and corresponding trigger time t thereof are obtained n3-The second measuring area is positioned at the downstream of the first measuring area along the traveling direction of the motor vehicle, and the lanes of the second measuring area correspond to the lanes of the first measuring area one by one;
s6, judging trigger time t corresponding to the same lane n2-And a trigger time t n3-Whether the difference value between the first preset interval and the second preset interval is within a third preset interval or not; if yes, go to step S7; if not, discarding vehicle snapshot information and black smoke emission detection information of the corresponding lane;
s7, associating the black smoke emission detection information of the corresponding lane according to the identifier;
s8, according to the trigger time t in the identifier n2-And associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information and the black smoke emission detection information.
Preferably, in step S8, the associated information after association is further processed according to the trigger time t n2-The sequence of (a) is sorted by queue.
Preferably, the vehicle snapshot information includes a picture containing a license plate and/or a video containing the license plate.
Preferably, the method for dynamically monitoring the emission of the motor vehicle further comprises the following steps:
s9, video monitoring information of each lane in the third measuring area and corresponding trigger time t thereof are obtained n4-(ii) a The third measuring area is located in the first measuring area or the second measuring area along the motor vehicleOn the downstream of the advancing direction, the lanes of the third measuring area correspond to the lanes of the first measuring area one by one;
s10, carrying out license plate recognition on the video monitoring information to obtain a license plate;
s11, judging trigger time t corresponding to target motor vehicle corresponding to license plate n4-And a trigger time t n2-Whether the difference value between the first preset interval and the second preset interval is within a fourth preset interval or not; if yes, go to step S12; if not, discarding the corresponding video monitoring information;
s12, associating the video monitoring information with the license plate;
and S13, associating the motor vehicle tail gas pollutant detection information, the vehicle snapshot information, the black smoke emission detection information and the video monitoring information according to the license plate to obtain target information.
Preferably, after the step S13, the method further includes the following steps:
s14, judging whether the emission of the motor vehicle exceeds the standard or not according to the type of the motor vehicle and the corresponding emission standard based on the target information; if yes, storing the target information in an overproof vehicle database; if not, the target information is stored in the qualified vehicle database.
Preferably, after the step S14, the method further includes the following steps:
and S15, pushing the target information of the standard exceeding vehicle database to a driver side corresponding to the standard exceeding vehicle.
The invention also provides a dynamic monitoring device for motor vehicle emissions, comprising:
an acquisition module for acquiring the detection information of the motor vehicle exhaust pollutants in the first measurement area and the corresponding trigger time t1Vehicle snapshot information of each lane and corresponding trigger time t n2-，nSequentially taking values as integers between 1 and N, wherein N is the total number of lanes in the first measuring area;
a judging module for judging the triggering time t corresponding to the vehicle snapshot information of the lane n2-And a trigger time t1Whether the difference value between the first preset interval and the second preset interval is within a first preset interval or not; and also used for judging the triggering time corresponding to the vehicle snapshot information of different lanesWhether the difference value between the first and second preset intervals is within a second preset interval or not;
the execution module is used for associating the detection information of the motor vehicle tail gas pollutants with the vehicle snapshot information according to identifiers, wherein the identifiers are lanes and corresponding trigger time t thereof n2-(ii) a But also to discard vehicle snapshot information for the corresponding lane.
The invention also provides a dynamic monitoring system for motor vehicle emissions, comprising:
the motor vehicle tail gas pollutant detection terminal is used for detecting the motor vehicle tail gas in the first measurement area to obtain the motor vehicle tail gas pollutant detection information and the corresponding trigger time t1；
A vehicle snapshot end for snapshot of the motor vehicles in each lane in the first measurement area to obtain vehicle snapshot information of each lane and corresponding trigger time t n2-，nSequentially taking values as integers between 1 and N, wherein N is the total number of lanes in the first measuring area;
the device also comprises a motor vehicle emission dynamic monitoring device according to the scheme, wherein the motor vehicle emission dynamic monitoring device is respectively communicated and interacted with the motor vehicle tail gas pollutant detection end and the vehicle snapshot end.
Compared with the prior art, the invention has the beneficial effects that:
the dynamic monitoring method for the motor vehicle emission judges the trigger time t acquired in the same measuring area1And a trigger time t n2-Whether the difference value between the first and second information is within a first preset interval or not is judged, and the accuracy of subsequent information association is ensured; whether the parallel vehicles exist is determined by judging whether the difference value between the triggering times corresponding to the vehicle snapshot information of different lanes is within a second preset interval, so that the problems of missing shooting, error detection and the like when multiple lanes pass through in parallel are avoided, and the accuracy of information association is further improved.
Drawings
FIG. 1 is a schematic view of a dynamic monitoring system for motor vehicle emissions in a motor vehicle road layout according to embodiment 1 of the present invention;
FIG. 2 is a hardware interaction diagram of a dynamic monitoring system for vehicle emissions according to embodiment 1 of the present invention;
FIG. 3 is a schematic block diagram of a dynamic monitoring apparatus for vehicle emissions according to embodiment 1 of the present invention;
FIG. 4 is a flowchart of a dynamic monitoring method for vehicle emissions according to embodiment 1 of the present invention;
FIG. 5 is a schematic view of a dynamic monitoring system for motor vehicle emissions in a motor vehicle road layout according to embodiment 2 of the present invention;
FIG. 6 is a flowchart of a dynamic monitoring method for vehicle emissions according to embodiment 2 of the present invention;
FIG. 7 is a schematic view of a dynamic monitoring system for motor vehicle emissions in a motor vehicle road layout according to embodiment 3 of the present invention;
fig. 8 is a schematic diagram of a dynamic monitoring system for motor vehicle emissions in a motor vehicle road layout according to embodiment 4 of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1:
as shown in fig. 1, the motor vehicle road includes three lanes, and isolation zones are provided on both sides of the road. A first measuring area I and a second measuring area II are sequentially divided on the motor vehicle road along the advancing direction of the motor vehicle.
As shown in fig. 2, the dynamic monitoring system for motor vehicle emission of the embodiment includes a motor vehicle exhaust pollutant detection end, a vehicle capture end 2, a black smoke vehicle optical remote detection end 3, a video camera end 4, a dynamic monitoring device for motor vehicle emission, and a cloud server.
The tail gas pollutant detection end of the motor vehicle is used for detecting tail gas pollutants of the motor vehicle entering the first measurement area I, and specifically comprises a main machine 1-1 and an auxiliary machine 1-2, wherein the main machine and the auxiliary machine are respectively arranged on isolation belts 0 on two sides of the first measurement area I of a motor vehicle road, and the specific framework of the main machine and the auxiliary machine can refer to the specific framework with the publication number of CN212872231U, the disclosure of which is incorporated herein by reference, is not repeated herein. By using the detection end for the motor vehicle exhaust pollutants of the embodiment, the detection information for the motor vehicle exhaust pollutants in the first measurement area I and the corresponding trigger time t can be obtained1。
The vehicle capturing end 2 is used for capturing vehicles of the motor vehicles entering the first measuring area to obtain vehicle capturing information of each lane and corresponding triggering time t n2-，nThe values are sequentially integers between 1 and N, wherein N is the total number of lanes in the first measurement area, and N is 3 in this embodiment. The vehicle snapshot information comprises a picture containing a license plate and/or a video containing the license plate. The vehicle capturing end is mounted on a first monitoring rod 5 of a motor vehicle road, the first monitoring rod 5 is located at the downstream of a first measuring area I along the motor vehicle traveling direction and located at the upstream of a second measuring area II along the motor vehicle traveling direction, and namely the first monitoring rod 5 is located between the first measuring area I and the second measuring area II.
The black smoke vehicle optical remote measuring end 3 (namely the black smoke vehicle optical remote measuring instrument) is positioned above the first measuring area I and is used for detecting tail gas black smoke of the motor vehicle entering the first measuring area. Specifically, three black smoke car optical remote measuring ends are installed on a U-shaped monitoring rod 6 of the motor vehicle road, so that each lane corresponds to one black smoke car optical remote measuring end respectively. The black smoke emission detection information of each lane in the first measurement area and the corresponding trigger time t can be obtained by utilizing the optical remote measurement end of the black smoke vehicle of the embodiment n3-。
The video camera end 4 is arranged on the first monitoring rod 5 and is used for carrying out video camera shooting on the motor vehicle entering the second measuring area II so as to obtain video monitoring information of each lane and corresponding trigger time t thereof n4-。
The dynamic monitoring equipment for motor vehicle emission is respectively in communication interaction with a motor vehicle tail gas pollutant detection end, a black smoke vehicle optical remote detection end, a vehicle snapshot end and a video camera end. Specifically, as shown in fig. 3, the dynamic monitoring device for vehicle emissions comprises:
an acquisition module for acquiring data within a first measurement area IMotor vehicle exhaust pollutant detection information and corresponding trigger time t1Vehicle snapshot information of each lane and corresponding trigger time t n2-Black smoke emission detection information of each lane and corresponding trigger time t n3-And the video monitoring system is also used for acquiring the video monitoring information of each lane in the second measurement area II and the corresponding trigger time t thereof n4-；
The recognition module is in communication connection with the acquisition module and is used for recognizing license plates in the vehicle snapshot information and the video monitoring information;
the judging module is in communication connection with the acquiring module and is used for judging the triggering time t corresponding to the vehicle snapshot information of the lane n2-And a trigger time t1Whether the difference value between the two is within a first preset interval or not, whether the difference value between the triggering times corresponding to the vehicle snapshot information of different lanes is within a second preset interval or not and whether the triggering time t corresponding to the same lane is within a second preset interval or not are judged n2-And a trigger time t n3-Whether the difference value between the first preset interval and the second preset interval is within a third preset interval or not; and is also used for judging the trigger time t corresponding to the target motor vehicle corresponding to the license plate n4-And a trigger time t n2-Whether the difference value between the first preset interval and the second preset interval is within a fourth preset interval or not; among them, more specifically:
the first preset interval is determined by the position of a license plate snapshot defense deployment trigger line and is generally set to be less than 0.5 s;
the second preset interval is determined by the response time of the license plate snapshot defense deployment trigger line and is generally set to be less than 0.6 s;
the third preset interval is determined by the position of a license plate snapping defense triggering line and the position of a triggering point of a black smoke optical telemeter, the distance between the license plate snapping defense triggering line and the triggering point of the black smoke optical telemeter is generally 1-3 m, and the third preset interval is generally set to be less than 0.4s according to the highest vehicle speed of 80km/h and the lowest vehicle speed of 30 km/h;
the fourth preset interval is determined by the position of a triggering line for snapping a rear license plate and the position of a triggering point of the black smoke optical telemeter, the distance between the triggering line and the triggering point is generally 15-25 m, and the fourth preset interval is generally set within 0.6s and 3s according to the highest vehicle speed of 80km/h and the lowest vehicle speed of 30 km/h.
The execution module is in communication connection with the identification module and the judgment module and is used for associating the detection information of the motor vehicle tail gas pollutants with the vehicle snapshot information or abandoning the vehicle snapshot information of the corresponding lane according to the identifier, wherein the identifier is the lane and the corresponding trigger time t n2-(ii) a The vehicle snapshot information and the black smoke emission detection information of the corresponding lane are also used for associating or abandoning the black smoke emission detection information of the corresponding lane according to the identifier; the system is also used for associating the video monitoring information with the license plate or discarding the corresponding video monitoring information; the system is also used for associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information, the black smoke emission detection information and the video monitoring information according to the license plate to obtain target information;
the judging module of the embodiment is also used for judging whether the emission of the motor vehicle exceeds the standard or not according to the type of the motor vehicle and the corresponding emission standard thereof based on the target information; correspondingly, the execution module is also used for storing the target information in an overproof vehicle database or a qualified vehicle database;
the cloud server of the embodiment is in wireless communication interaction with the dynamic motor vehicle emission monitoring equipment, and is used for pushing target information (namely, overproof vehicle information) in an overproof vehicle database to a driver end corresponding to an overproof vehicle so as to inform the driver of a tail gas monitoring result of the motor vehicle driven by the driver, and the overproof informing notification is realized.
As shown in fig. 4, the method for dynamically monitoring emissions of a motor vehicle of the present embodiment specifically includes the following steps:
s1, acquiring detection information of the motor vehicle tail gas pollutants in the first measurement area and corresponding trigger time t1Vehicle snapshot information of each lane and corresponding trigger time t n2-Black smoke emission detection information of each lane and corresponding trigger time t n3-；nSequentially taking values as 1, 2 and 3;
s2, judging triggering time t corresponding to vehicle snapshot information of the lane n2-And a trigger time t1Whether the difference value between the first preset interval and the second preset interval is within a first preset interval or not; if yes, go to step S3; if not, discarding the vehicle snapshot information of the corresponding lane; wherein the content of the first and second substances,the first preset interval is determined by the position of a license plate snapshot defense deployment trigger line and is generally set to be less than 0.5 s;
s3, judging whether the difference value between the trigger times corresponding to the vehicle snapshot information of different lanes is within a second preset interval or not; if so, the vehicles running in parallel exist, and vehicle snapshot information of the corresponding lane is discarded; if not, go to step S4; wherein the second preset interval is determined by the response time of the license plate snapshot defense deployment trigger line and is generally set to be less than 0.6 s;
s4, the detection information of the motor vehicle exhaust pollutants is associated with the vehicle snapshot information according to the identifier, and the identifier is the lane and the corresponding trigger time t n2-；
S5, judging trigger time t corresponding to the same lane n2-And a trigger time t n3-Whether the difference value between the first preset interval and the second preset interval is within a third preset interval or not; if yes, go to step S6; if not, discarding vehicle snapshot information and black smoke emission detection information of the corresponding lane; the step S5 and the foregoing steps S2-S4 have no necessary sequence relationship, and a corresponding sequence may be designed according to actual situations; the third preset interval is determined by the position of a license plate snapshot defense triggering line and the position of a triggering point of a black smoke optical telemeter, the distance between the license plate snapshot defense triggering line and the triggering point of the black smoke optical telemeter is generally 1-3 m, and the third preset interval is generally set to be less than 0.4s according to the highest vehicle speed of 80km/h and the lowest vehicle speed of 30 km/h;
s6, associating the black smoke emission detection information of the corresponding lane according to the identifier; the identifier being a lane and its corresponding trigger time t n2-；
S7, according to the trigger time t in the identifier n2-Associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information and the black smoke emission detection information;
s8, acquiring video monitoring information of each lane in the second measurement area and corresponding trigger time t n4-(ii) a The step S8 and the foregoing steps S2-S7 have no necessary sequence relationship, and a corresponding sequence may be designed according to actual situations;
s9, carrying out license plate recognition on the video monitoring information to obtain a license plate;
s10, judging trigger time t corresponding to target motor vehicle corresponding to license plate n4-And a trigger time t n2-Whether the difference value between the first preset interval and the second preset interval is within a fourth preset interval or not; if yes, go to step S11; if not, discarding the corresponding video monitoring information; the fourth preset interval is determined by the position of a triggering line for snapshotting and preventing the rear license plate and the position of a triggering point of the black smoke optical telemeter, the distance between the triggering line and the black smoke optical telemeter is generally 15-25 m, the fourth preset interval is generally set to be 0.6s and 3s according to the highest vehicle speed of 80km/h and the lowest vehicle speed of 30km/h]Within.
S11, associating the video monitoring information with the license plate;
s12, associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information, the black smoke emission detection information and the video monitoring information according to the license plate to obtain target information;
s13, judging whether the emission of the motor vehicle exceeds the standard or not according to the type of the motor vehicle and the corresponding emission standard based on the target information; if yes, storing the target information in an overproof vehicle database; if not, storing the target information in a qualified vehicle database;
and S14, the target information (i.e. the standard exceeding vehicle information) of the standard exceeding vehicle database can be pushed to the driver end corresponding to the standard exceeding vehicle by the supervision department or other relevant departments so as to send a standard exceeding notification to the driver end.
Example 2:
the dynamic monitoring system for vehicle emissions of the present embodiment is different from embodiment 1 in that:
as shown in fig. 5, the vehicle road of the present embodiment is divided into a first measurement area I, a second measurement area II, and a third measurement area III in sequence along the traveling direction of the vehicle.
Correspondingly, the black smoke vehicle optical remote measuring end 30 is arranged above the second measuring area II for performing the tail gas black smoke detection on the motor vehicle entering the second measuring area II. Specifically, three black smoke vehicle optical remote measuring ends are mounted on the U-shaped monitoring rod 60 located in the second measuring area of the motor vehicle road, so that each lane corresponds to one black smoke vehicle optical remote measuring end respectively. Black using this exampleThe optical remote measurement end of the smoke vehicle can obtain black smoke emission detection information of each lane in the second measurement area and corresponding trigger time t n3-。
In addition, a vehicle snapshot end and a video camera end are further arranged on the U-shaped monitoring rod 60, so that the vehicle snapshot end can snapshot the motor vehicle entering the first measurement area I conveniently, the video camera end can shoot the motor vehicle entering the third measurement area III conveniently, and the monitoring rod is not required to be additionally arranged to install the vehicle snapshot end and the video camera end.
Along with the adjustment of the measurement area, each corresponding preset interval needs to be correspondingly adjusted, and the method specifically comprises the following steps:
the first preset interval is determined by the position of a license plate snapshot defense deployment trigger line and is generally set to be less than 0.5 s;
the second preset interval is determined by the response time of the license plate snapshot defense deployment trigger line and is generally set to be less than 0.6 s;
the third preset interval is determined by the position of a license plate snapping defense triggering line and the position of a triggering point of a black smoke optical telemeter, the distance between the license plate snapping defense triggering line and the triggering point of the black smoke optical telemeter is generally 15-25 m, and the fourth preset interval is generally set within 0.6s and 3s according to the highest vehicle speed of 80km/h and the lowest vehicle speed of 30 km/h;
the fourth preset interval is determined by the position of a triggering line for snapshotting and preventing the rear license plate and the position of a triggering point of the black smoke optical telemeter, the distance between the triggering line and the black smoke optical telemeter is generally 15-25 m, and the fourth preset interval is generally set within 0.6s and 3s according to the highest vehicle speed of 80km/h and the lowest vehicle speed of 30 km/h;
the dynamic monitoring device for vehicle emission and other structures of the system can refer to embodiment 1, and are not described herein.
As shown in fig. 6, the method for dynamically monitoring emissions of a motor vehicle of the present embodiment is substantially the same as the method for dynamically monitoring emissions of a motor vehicle of embodiment 1, and specifically includes the following steps:
s1, acquiring detection information of motor vehicle exhaust pollutants in the first measurement area I and corresponding trigger time t1Vehicle snapshot information of each lane and corresponding trigger time t n2-；nSequentially taking values as 1, 2 and 3;
S2、judging triggering time t corresponding to vehicle snapshot information of lane n2-And a trigger time t1Whether the difference value between the first preset interval and the second preset interval is within a first preset interval or not; if yes, go to step S3; if not, discarding the vehicle snapshot information of the corresponding lane; wherein, the first preset interval is determined by the position of a license plate snapshot defense deployment trigger line and is generally set to be less than 0.5 s;
s3, judging whether the difference value between the trigger times corresponding to the vehicle snapshot information of different lanes is within a second preset interval or not; if so, the vehicles running in parallel exist, and vehicle snapshot information of the corresponding lane is discarded; if not, go to step S4; the difference value between the triggering times corresponding to the vehicle snapshot information of different lanes is the difference value between the triggering times corresponding to the vehicle snapshot information of any two different lanes; the second preset interval is determined by the response time of the license plate snapshot defense deployment trigger line and is generally set to be less than 0.6 s;
s4, the detection information of the motor vehicle exhaust pollutants is associated with the vehicle snapshot information according to the identifier, and the identifier is the lane and the corresponding trigger time t n2-；
S5, acquiring black smoke emission detection information of each lane in the second measurement area II and corresponding trigger time t n3-(ii) a Wherein the content of the first and second substances,nsequentially taking values as 1, 2 and 3; the step S5 and the foregoing steps S2-S4 have no necessary sequence relationship, and a corresponding sequence may be designed according to actual situations;
s6, judging trigger time t corresponding to the same lane n2-And a trigger time t n3-Whether the difference between the first and second measurement ranges is within a third preset interval, namely whether the motor vehicle arriving at the second measurement range is the target motor vehicle is determined based on the speed of the motor vehicle; if yes, go to step S7; if not, discarding vehicle snapshot information and black smoke emission detection information of the corresponding lane; wherein the third preset interval is determined by the position of a license plate snapping prevention trigger line and the position of a trigger point of a black smoke optical telemeter, the distance between the third preset interval and the trigger point is generally 15-25 m, the fourth preset interval is generally set to be 0.6s and 3s according to the maximum vehicle speed of 80km/h and the minimum vehicle speed of 30km/h]Within;
s7, associating the black smoke emission detection information of the corresponding lane according to the identifier; the identifier being a lane and its corresponding trigger time t n2-；
S8, according to the trigger time t in the identifier n2-Associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information and the black smoke emission detection information;
s9, acquiring video monitoring information of each lane in the third measuring area and corresponding trigger time t n4-(ii) a The step S9 and the foregoing steps S2-S8 have no necessary sequence relationship, and a corresponding sequence may be designed according to actual situations;
s10, carrying out license plate recognition on the video monitoring information to obtain a license plate;
s11, judging trigger time t corresponding to target motor vehicle corresponding to license plate n4-And a trigger time t n2-Whether the difference value between the first preset interval and the second preset interval is within a fourth preset interval or not; if yes, go to step S12; if not, discarding the corresponding video monitoring information; the fourth preset interval is determined by the position of a triggering line for snapshotting and preventing the rear license plate and the position of a triggering point of the black smoke optical telemeter, the distance between the triggering line and the black smoke optical telemeter is generally 15-25 m, the fourth preset interval is generally set to be 0.6s and 3s according to the maximum vehicle speed of 80km/h and the minimum vehicle speed of 30km/h]Within;
s12, associating the video monitoring information with the license plate;
s13, associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information, the black smoke emission detection information and the video monitoring information according to the license plate to obtain target information;
s14, judging whether the emission of the motor vehicle exceeds the standard or not according to the type of the motor vehicle and the corresponding emission standard based on the target information; if yes, storing the target information in an overproof vehicle database; if not, storing the target information in a qualified vehicle database;
and S15, the target information (i.e. the standard exceeding vehicle information) of the standard exceeding vehicle database can be pushed to the driver end corresponding to the standard exceeding vehicle by the supervision department or other relevant departments so as to send a standard exceeding notification to the driver end.
Example 3:
the dynamic monitoring system for vehicle emissions of the present embodiment is different from embodiment 1 in that:
as shown in fig. 7, the black smoke vehicle optical remote measuring end 300 is arranged above the second measuring region; correspondingly, in the dynamic monitoring method for the motor vehicle emission, the triggering time t corresponding to the same lane is judged n2-And a trigger time t n3-A step of determining whether the vehicle reaching the second measurement area is the target vehicle based on the vehicle speed of the vehicle; the dynamic monitoring system realizes the diversification of the motor vehicle emission dynamic monitoring system framework and meets the requirements of different application occasions.
Other steps can be referred to example 1.
Example 4:
the dynamic monitoring system for vehicle emissions of the present embodiment differs from embodiment 2 in that:
as shown in fig. 8, the detection end of the motor vehicle exhaust pollutants is also arranged in the second measurement area II, so that the diversification of the motor vehicle emission dynamic monitoring system framework is realized, and the requirements of different application occasions are met.
Other steps can be referred to example 1.
The three-lane design of the automobile road in the above embodiment is only an example, and is not limited to three lanes, and may be adjusted accordingly according to the lane design of the actual automobile road, for example, two lanes, four lanes, five lanes, and the like.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. A method for dynamically monitoring emissions from a motor vehicle, comprising the steps of:
s1, acquiring detection information of the motor vehicle tail gas pollutants in the first measurement area and corresponding trigger time t1And each vehicleRoad vehicle snapshot information and corresponding trigger time t n2-，nSequentially taking values as integers between 1 and N, wherein N is the total number of lanes in the first measuring area;
s2, judging triggering time t corresponding to vehicle snapshot information of the lane n2-And a trigger time t1Whether the difference value between the first preset interval and the second preset interval is within a first preset interval or not; if yes, go to step S3; if not, discarding the vehicle snapshot information of the corresponding lane;
s3, judging whether the difference value between the trigger times corresponding to the vehicle snapshot information of different lanes is within a second preset interval or not; if so, the vehicles running in parallel exist, and vehicle snapshot information of the corresponding lane is discarded; if not, go to step S4;
s4, the detection information of the motor vehicle exhaust pollutants is associated with the vehicle snapshot information according to the identifier, and the identifier is the lane and the corresponding trigger time t n2-。
2. The dynamic motor vehicle emissions monitoring method of claim 1, further comprising the steps of:
s5, black smoke emission detection information of each lane in the first measurement area and corresponding trigger time t thereof are obtained n3-；
S6, judging trigger time t corresponding to the same lane n2-And a trigger time t n3-Whether the difference value between the first preset interval and the second preset interval is within a third preset interval or not; if yes, go to step S7; if not, discarding vehicle snapshot information and black smoke emission detection information of the corresponding lane;
s7, associating the black smoke emission detection information of the corresponding lane according to the identifier;
s8, according to the trigger time t in the identifier n2-And associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information and the black smoke emission detection information.
3. The dynamic motor vehicle emissions monitoring method of claim 1, further comprising the steps of:
s5, black smoke emission detection information of each lane in the second measurement area and corresponding trigger time t thereof are obtained n3-The second measuring area is positioned at the downstream of the first measuring area along the traveling direction of the motor vehicle, and the lanes of the second measuring area correspond to the lanes of the first measuring area one by one;
s6, judging trigger time t corresponding to the same lane n2-And a trigger time t n3-Whether the difference value between the first preset interval and the second preset interval is within a third preset interval or not; if yes, go to step S7; if not, discarding vehicle snapshot information and black smoke emission detection information of the corresponding lane;
s7, associating the black smoke emission detection information of the corresponding lane according to the identifier;
s8, according to the trigger time t in the identifier n2-And associating the detection information of the motor vehicle tail gas pollutants, the vehicle snapshot information and the black smoke emission detection information.
4. A dynamic monitoring method for emissions from motor vehicles according to claim 2 or 3, characterized in that in step S8, the associated information after association is further processed according to the triggering time t n2-The sequence of (a) is sorted by queue.
5. The method according to claim 2 or 3, wherein the vehicle snapshot information includes a picture containing a license plate and/or a video containing a license plate.
6. The dynamic motor vehicle emissions monitoring method of claim 5, further comprising the steps of:
s9, video monitoring information of each lane in the third measuring area and corresponding trigger time t thereof are obtained n4-(ii) a The third measuring area is positioned at the downstream of the first measuring area or the second measuring area along the traveling direction of the motor vehicle, and the lanes of the third measuring area correspond to the lanes of the first measuring area one by one;
s10, carrying out license plate recognition on the video monitoring information to obtain a license plate;
s11, judging trigger time t corresponding to target motor vehicle corresponding to license plate n4-And a trigger time t n2-Whether the difference value between the first preset interval and the second preset interval is within a fourth preset interval or not; if yes, go to step S12; if not, discarding the corresponding video monitoring information;
s12, associating the video monitoring information with the license plate;
and S13, associating the motor vehicle tail gas pollutant detection information, the vehicle snapshot information, the black smoke emission detection information and the video monitoring information according to the license plate to obtain target information.
7. The dynamic monitoring method for emissions from motor vehicles according to claim 6, further comprising the following steps after step S13:
s14, judging whether the emission of the motor vehicle exceeds the standard or not according to the type of the motor vehicle and the corresponding emission standard based on the target information; if yes, storing the target information in an overproof vehicle database; if not, the target information is stored in the qualified vehicle database.
8. The dynamic monitoring method for emissions from motor vehicles as claimed in claim 7, further comprising the following steps after step S14:
and S15, pushing the target information of the standard exceeding vehicle database to a driver side corresponding to the standard exceeding vehicle.
9. An automotive emissions dynamics monitoring apparatus, comprising:
an acquisition module for acquiring the detection information of the motor vehicle exhaust pollutants in the first measurement area and the corresponding trigger time t1Vehicle snapshot information of each lane and corresponding trigger time t n2-，nSequentially taking values as integers between 1 and N, wherein N is the total number of lanes in the first measuring area;
a judging module for judging the triggering time t corresponding to the vehicle snapshot information of the lane n2-And a trigger time t1Whether the difference value between the first preset interval and the second preset interval is within a first preset interval or not; the vehicle snapshot information acquisition device is also used for judging whether the difference value between the triggering times corresponding to the vehicle snapshot information of different lanes is within a second preset interval or not;
the execution module is used for associating the detection information of the motor vehicle tail gas pollutants with the vehicle snapshot information or abandoning the vehicle snapshot information of the corresponding lane according to the identifier; wherein, the identifier is a lane and a corresponding trigger time t n2-。
10. A dynamic motor vehicle emissions monitoring system, comprising:
the motor vehicle tail gas pollutant detection terminal is used for detecting the motor vehicle tail gas in the first measurement area to obtain the motor vehicle tail gas pollutant detection information and the corresponding trigger time t1；
A vehicle snapshot end for snapshot of the motor vehicles in each lane in the first measurement area to obtain vehicle snapshot information of each lane and corresponding trigger time t n2-，nSequentially taking values as integers between 1 and N, wherein N is the total number of lanes in the first measuring area;
the dynamic monitoring device for the vehicle emission is further comprised according to claim 9, and is respectively in communication interaction with the vehicle exhaust pollutant detection terminal and the vehicle snapshot terminal.
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