CN114241785A - Method, system and equipment for recognizing and recording illegal lane occupation behaviors of non-motor vehicles - Google Patents
Method, system and equipment for recognizing and recording illegal lane occupation behaviors of non-motor vehicles Download PDFInfo
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Abstract
The invention relates to the technical field of radio frequency identification, and discloses periodic checking radio frequency tag information, wherein the distance between a vehicle and an antenna is determined according to the radio frequency tag information, a radio frequency node is triggered when the distance reaches a preset radio frequency triggering distance, the antenna closest to the tag is obtained, a lane in which the vehicle runs and camera information corresponding to the lane are determined through the antenna closest to the tag, whether the vehicle can be illegal or not is judged, if yes, a snapshot node is triggered, and the vehicle is snapshot to obtain illegal picture records. The scheme adopts a multi-antenna design, the radio frequency module periodically checks the radio frequency tags in the front range of the antenna, whether the vehicle has illegal behaviors is finally determined through the mutual conversion relation among the touch antenna number, the antenna direction, the camera number and the lane type, and the video recognition of the illegal behaviors of the non-motor vehicle is assisted, so that the recognition rate and the success rate can be improved under the influence of objective factors.
Description
Technical Field
The invention relates to the technical field of radio frequency identification, in particular to a method, a system and equipment for identifying and recording illegal lane occupation behaviors of a non-motor vehicle.
Background
The characteristics of flexibility, convenience, rapidness and cheapness of non-motor vehicles such as electric bicycles and the like enable the non-motor vehicles to occupy a considerable proportion in urban transportation vehicles, but due to the characteristics, the control of the non-motor vehicles has certain difficulty. Common unlawful behaviors of non-motor vehicles include: the method comprises the following steps of occupying motor vehicle lanes, running in the wrong direction, running red light, carrying people, not wearing helmets and the like, wherein the lane occupation and the red light running are most likely to cause serious traffic accidents.
At present, road conditions are more complicated, illegal behaviors of running vehicles cannot be judged only by manpower, and all-weather lane monitoring and data uploading by using road surface equipment are needed. Generally, a video image recognition device can meet the requirement, but the driving route of the non-motor vehicle is complex, the non-motor vehicle is easy to be stuck, and when the non-motor vehicle occupies the road, the visual field is often blocked by the motor vehicle due to the height difference, so that the objective condition easily causes the problem of the reduction of the video recognition rate.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for discriminating the illegal behavior of occupying lanes by discriminating the lanes of the running non-motor vehicles through radio frequency identification, and provides equipment for acquiring the information of the non-motor vehicles by combining the visual radio frequency.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for recognizing and recording illegal lane occupation behavior of non-motor vehicles comprises
The method comprises the steps of periodically checking radio frequency tag information, determining the distance between a vehicle and an antenna according to the radio frequency tag information, triggering a radio frequency node when the distance reaches a preset radio frequency triggering distance, obtaining the antenna closest to the tag, determining a vehicle running lane and camera information corresponding to the lane through the antenna closest to the tag, judging whether the vehicle is illegal, and if so, triggering a snapshot node to complete the snapshot of the vehicle to obtain illegal picture records.
In the invention, further, the lane in which the vehicle runs is determined by the antenna closest to the tag, and the camera information corresponding to the lane comprises
Step S1: performing radio frequency node triggering when the tag distance reaches a preset radio frequency triggering distance, determining a triggering antenna, performing first round conversion between antenna-antenna deployment directions by taking the antenna number of the triggering antenna as input, and screening out the antennas with the same deployment direction as the triggering antenna;
step S2: and determining the antenna closest to the tag in the antennas in the same deployment direction of the trigger antennas, performing second-round conversion of antenna-camera number-vehicle type by taking the antenna number of the antenna closest to the tag as input, and determining a driving lane corresponding to the antenna closest to the tag and a camera number corresponding to the driving lane.
In the present invention, further, the determining whether the vehicle is illegal, and if yes, triggering a snapshot node, and completing the snapshot of the vehicle through a camera includes:
step S3: and judging whether the non-motor vehicle forms road occupation illegal behaviors or not by comparing whether the lane type corresponding to the camera number is consistent with the vehicle type in the label information or not, if so, forming illegal behaviors, and if so, performing third-round conversion by taking the camera number as input, determining the quantity of law enforcement pictures snapshoted by the road occupation behaviors, and entering a snapshotting node.
In the invention, further, the antenna closest to the tag is judged according to the maximum RSSI value or the maximum times of the antenna for checking the tag.
In the invention, further, a corresponding relation between a preset antenna and a lane type and the number of illegal candid shots of the camera are included, wherein the corresponding relation comprises a mutual conversion relation among an antenna number, an antenna direction, a camera number and the lane type.
In the present invention, the radio frequency tag information further includes vehicle information and radio frequency phase information, where the vehicle information includes a license plate number, a vehicle type, a vehicle body color, a tag card number, and a vehicle delivery date, and the radio frequency phase information is used to calculate phase data to obtain a distance between the vehicle and the antenna.
In the invention, the snapshot node is further divided into a command non-issuing state, a command issuing ending state and a snapshot ending state according to the number of the snapshot law enforcement pictures and the snapshot command issuing time, and after the snapshot ending state.
In the invention, further, after the snapshot is finished, the tag information, the camera information and the illegal picture record of the vehicle are integrated, and the Ethernet link is reported to the background management software.
A system for recognizing and recording illegal lane occupation behavior of non-motor vehicles comprises
The radio frequency module is used for periodically checking radio frequency tag information, determining the distance between the vehicle and the antenna according to the radio frequency tag information, triggering a radio frequency node when the distance reaches a preset radio frequency triggering distance, acquiring the antenna closest to the tag, determining a lane where the vehicle runs and camera information corresponding to the lane through the antenna closest to the tag, judging whether the vehicle can be illegal or not, and generating an illegal snapshot signal if the vehicle is illegal;
and the snapshot module is used for receiving the illegal snapshot signal of the radio frequency module, completing the snapshot of the vehicle according to the preset snapshot data and the snapshot time node, and uploading the snapshot picture to the radio frequency module.
And the recording module is used for integrating and storing the label information of the vehicle of the radio frequency module, the corresponding camera information and the illegal picture record and reporting the integrated information to the management module.
And the management module is used for receiving the data reported by the recording module and analyzing and managing the data.
A device for recognizing and recording illegal road occupation behaviors of non-motor vehicles is based on the method and comprises
Each radio frequency antenna is opposite to the lane and is used for periodically checking the radio frequency tag information;
the camera is arranged between any two radio frequency antennas and used for capturing illegal vehicles.
Compared with the prior art, the invention has the beneficial effects that:
the method and the device have the advantages that the corresponding relation of the antenna, the lane type and other parameters is preset in the pavement equipment, the radio frequency tag information is checked through the antenna, the distance from the radio frequency tag to the antenna can be further calculated, the lane can be judged, when the radio frequency tag of the non-motor vehicle finishes the lane judgment, the type of lane on which the tag runs can be determined according to the preset relation, and whether the vehicle has lane occupation illegal behaviors or not is finally determined. After the lane occupation is determined, the radio frequency module informs the camera to carry out illegal behavior snapshot, and after the snapshot is finished, the recording module integrates the radio frequency information, the position information, illegal picture records and the like of the non-motor vehicle and reports the integrated information to the management module through the Ethernet link to serve as law enforcement basis, so that the problem that information is missed due to objective defects of a pure video equipment technical route is solved.
Meanwhile, the scheme adopts a lane distinguishing method of radio frequency triggering and the maximum RSSI or the maximum times of antenna checking labels, adopts a multi-antenna design, and a radio frequency module periodically checks the radio frequency labels in the front range of the antenna, finally determines whether vehicles have illegal behaviors or not through the mutual conversion relation among the touch antenna number, the antenna direction, the camera number and the lane type, and assists videos to identify the illegal behaviors of non-motor vehicles, so that the identification rate and the success rate can be improved under the objective factor influence.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow chart of a method for recognizing and recording illegal lane occupation behaviors of non-motor vehicles according to the invention;
FIG. 2 is a schematic flow chart of steps S1 and S2 in the method for recording the illegal lane occupation behavior of the non-motor vehicle according to the invention;
FIG. 3 is a schematic flow chart illustrating step S3 of the method for recording the illegal lane occupation behavior of the non-motor vehicle according to the present invention;
FIG. 4 is a schematic diagram illustrating a radio frequency tag node scheduling process according to the present invention;
FIG. 5 is a schematic structural diagram of a system for recognizing and recording illegal lane occupation behavior of a non-motor vehicle according to the present invention;
FIG. 6 is a schematic view of the disposition of the recording device for recognizing the illegal road occupation behavior of the non-motor vehicle according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a preferred embodiment of the present invention provides a method for identifying and recording illegal lane occupation behavior of a non-motor vehicle, including:
firstly, when the antenna is deployed, presetting a corresponding relation between the antenna and the lane type and the illegal snapshot number of the camera, wherein the corresponding relation comprises a mutual conversion relation between an antenna number, an antenna direction, a camera number and the lane type.
Checking radio frequency tag information when a vehicle enters a radio frequency range (distance threshold value 1 in an attached drawing), determining the distance between the vehicle and an antenna according to the radio frequency tag information, triggering a radio frequency node when the distance reaches a preset radio frequency triggering distance (distance threshold value 2 in the attached drawing), acquiring the antenna closest to the tag, determining a lane where the vehicle runs and camera information corresponding to the lane through the antenna closest to the tag, judging whether the vehicle can be illegal, if so, triggering a snapshot node, and completing the snapshot of the vehicle to acquire illegal picture records.
And after the snapshot is finished, integrating the label information, the camera information and the illegal picture record of the vehicle, and reporting the label information, the camera information and the illegal picture record to background management software through an Ethernet link.
The scheme is based on a GB37987 protocol, and radio frequency equipment receives and records vehicle information of non-motor vehicles recorded by all radio frequency tags in a field, namely, parts in the radio frequency tag information, the information coverage is wider, and the information can include owner names, vehicle delivery dates, license plate numbers, vehicle types, vehicle body colors, tag card numbers and the like which are not possessed by video identification.
The method and the device have the advantages that the corresponding relation of the antenna, the lane type and other parameters is preset in the pavement equipment, the radio frequency tag information is checked through the antenna, the distance from the radio frequency tag to the antenna can be further calculated, the lane can be judged, when the radio frequency tag of the non-motor vehicle finishes the lane judgment, the type of lane on which the tag runs can be determined according to the preset relation, and whether the vehicle has lane occupation illegal behaviors or not is finally determined. After the lane occupation is determined, the radio frequency module informs the camera to carry out illegal behavior snapshot, and after the snapshot is finished, the recording module integrates the radio frequency information, the position information, illegal picture records and the like of the non-motor vehicle and reports the integrated information to the management module through the Ethernet link to serve as law enforcement basis, so that the problem that information is missed due to objective defects of a pure video equipment technical route is solved.
Specifically, in the radio frequency range of the vehicle entering the radio frequency range, the radio frequency tag information is checked, the radio frequency tag information comprises the vehicle information and the radio frequency phase information, the distance between the radio frequency tag and the antenna is obtained through calculation of radio frequency phase data, and when the distance reaches a preset radio frequency triggering distance, the vehicle carrying the radio frequency tag can be considered to reach a preset position of a camera frame, so that the vehicle enters a lane distinguishing stage.
Specifically, the radio frequency signal is modulated and transmitted by a sine wave, and the signal of the sine wave can be determined by three factors of amplitude, frequency and phase. The state of a sine wave can be represented by using a complex plane with an intensity vector and polar coordinates, and In a polar coordinate system, two components can be represented, wherein the X axis represents an I (In-phase) component, and the Y axis represents a Q (Quadrature) component. The IQ components are 90 degrees out of phase. In the IQ diagram, the length of a vector represents the amplitude of the signal, and the angle θ between the vector and the I component is the phase. If the IQ value of the antenna transmission signal is obtained, the phase of the signal can be obtained. The distance between the radio frequency tag and the antenna can be obtained through the frequency and phase calculation of the signal. When phase information is obtained, the positioning can be generally performed by using a phase difference method, i.e. the distance is reflected by using the change of the phase. The three commonly used phase difference methods are: time Domain Phase Difference of Arrival (TDPDOA), frequency Domain Phase Difference of Arrival (FDPDOA), and Spatial Phase Difference of Arrival (SDPDOA). These methods directly calculate the relative position from the frequency information of the signal. When the phase information is accurate, the three methods can provide accurate distance measurement results.
In the lane identification stage, when one rf tag is in the field, generally, the rf tag is covered by multiple antennas at the same time, and each antenna stores and updates the tag information maintained by the antenna at each round of inventory, but due to the position difference between different antennas and the rf tag, the rf indexes maintained by the same tag by each antenna are also different. Therefore, at this stage, it is necessary to specifically determine under which antenna the radio frequency tag is located.
Specifically, as shown in fig. 2, the determining, by the antenna closest to the tag, the lane in which the vehicle is traveling and the camera information corresponding to the lane include:
step S1: performing radio frequency node triggering when the tag distance reaches a preset radio frequency triggering distance, determining a triggering antenna, performing a first round of conversion between antenna-antenna deployment directions by taking an antenna number of the triggering antenna as input, and screening out antennas which are consistent with the deployment directions of the triggering antenna, namely co-directional antennas;
therefore, the antennas different from the deployment direction of the trigger antenna are screened out through the first-wheel conversion, the interference of subsequent data processing conversion is reduced, the burden of data processing and transmission can be reduced, and the system response is improved.
Step S2: and determining the antenna closest to the tag in the antennas in the same deployment direction of the trigger antennas, performing second-round conversion of antenna-camera number-vehicle type by taking the antenna number of the antenna closest to the tag as input, and determining a driving lane corresponding to the antenna closest to the tag, a camera number corresponding to the lane and a lane type corresponding to the camera number.
The method judges the antenna closest to the tag through the RSSI maximum value or the maximum times of checking the tag by the antenna.
In one embodiment provided by the invention, the antenna closest to the tag is determined by the maximum RSSI value. The RSSI value indicates the strength of a received signal, and is an important indicator of a radio frequency signal, and it can be generally considered that if the maximum RSSI value of one radio frequency tag read by a certain antenna is greater than the maximum RSSI value of the tag read by other antennas, it indicates that the distance from the tag to the antenna is shortest. By utilizing the rule, the antenna closest to the triggered radio frequency tag is screened according to the updated RSSI maximum value of each round of inventory, so that the non-motor vehicle carrying the radio frequency tag can be regarded as passing from the place closest to the antenna once, namely passing on the lane corresponding to the antenna.
In another embodiment provided by the invention, the antenna closest to the tag is judged by using the maximum times of the antenna for checking the tag. The time of each antenna wheel point is the same, and the hardware configuration and the radio frequency performance of each antenna are also the same, so when the tag enters a radio frequency triggering stage, the times of counting the tag by different antennas are compared, the antenna with the most times represents the nearest average distance to the tag, and a non-motor vehicle carrying the tag can also be considered to pass through a lane corresponding to the antenna.
In the present invention, as shown in fig. 3, the determining whether the vehicle is illegal, and if yes, triggering a snapshot node, and completing the snapshot of the vehicle through a camera includes:
step S3: judging whether the non-motor vehicle forms road occupation illegal behaviors or not by comparing whether the lane type corresponding to the camera number is consistent with the vehicle type in the label information or not, if so, forming illegal behaviors, performing third-round conversion by taking the camera number as input, triggering a snapshot signal through the camera number, determining the quantity of law enforcement pictures snapshot by the road occupation behaviors, and entering a snapshot node. If not, the illegal action is not formed, and the program is directly quitted.
In the present invention, as shown in fig. 4, further, the radio frequency tag information recorded in the process of checking multiple antennas of the road surface device exists in the form of linked list nodes in software, each wheel point creates a node or updates the existing node state, and when the node meets the distance or speed TRIGGER threshold and determines the track occupation behavior, the node enters a TRIGGER state (TRIGGER) and is converted into a snapshot node.
The snapshot node is divided into a command non-issuing state (NULL), a command issuing state (CMD), a command issuing ending state (CMDEND) and a snapshot ending state (END) according to the quantity of the snapshot law enforcement pictures and the snapshot command issuing time, and after the snapshot ending state. Specifically, the snapshot signal triggers the snapshot node to generate a snapshot command, the snapshot command is sequentially converted through the four states, after the command is issued, all the snapshot pictures of the camera are completed, and then the pictures are transmitted back to the radio frequency antenna, namely the snapshot is completed. And finally, integrating the label information, the camera information and the illegal picture records of the vehicle, and reporting the label information, the camera information and the illegal picture records to background management software through an Ethernet link. Therefore, the recognition and recording of the illegal lane occupation behaviors of the non-motor vehicles are completed.
In another embodiment provided by the present invention, as shown in fig. 5, there is further provided a system for identifying and recording illegal lane occupation behavior of non-motor vehicles, comprising
The radio frequency module is used for periodically checking radio frequency tag information, determining the distance between the vehicle and the antenna according to the radio frequency tag information, triggering a radio frequency node when the distance reaches a preset radio frequency triggering distance, acquiring the antenna closest to the tag, determining a lane where the vehicle runs and camera information corresponding to the lane through the antenna closest to the tag, judging whether the vehicle can be illegal or not, and generating an illegal snapshot signal if the vehicle is illegal;
and the snapshot module is used for receiving the illegal snapshot signal of the radio frequency module, completing the snapshot of the vehicle according to the preset snapshot data and the snapshot time node, and uploading the snapshot picture to the radio frequency module.
And the recording module is used for storing the data of the radio frequency module and the snapshot module, and integrating and reporting the label information of the vehicle of the radio frequency module, the corresponding camera information and the illegal picture record to the management module.
And the management module is used for receiving the data reported by the recording module and analyzing and managing the data.
In another embodiment provided by the law, the law also provides a device for identifying and recording illegal road occupation behaviors of the non-motor vehicles, and the method comprises the following steps
Each radio frequency antenna is opposite to the lane and is used for periodically checking the radio frequency tag information;
the camera is arranged between any two radio frequency antennas and used for capturing illegal vehicles.
Specifically, as shown in fig. 6, the road surface equipment carries 4 antennas to collect radio frequency data facing multiple lanes, and carries 2 cameras to capture law enforcement pictures. The lane 4 is used as a non-motor vehicle lane, the equipment cannot judge that the non-motor vehicle occupies the lane illegally when the non-motor vehicle normally runs, if the non-motor vehicle enters the lane 1-3 and runs for a certain distance, illegal snapshot of the camera is triggered, the camera V covers the lane 1 and the lane 2, and the camera RV covers the lane 3 and the lane 4.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (10)
1. A method for recognizing and recording illegal lane occupation behavior of non-motor vehicles is characterized by comprising
The method comprises the steps of periodically checking radio frequency tag information, determining the distance between a vehicle and an antenna according to the radio frequency tag information, triggering a radio frequency node when the distance reaches a preset radio frequency triggering distance, obtaining the antenna closest to the tag, determining a vehicle running lane and camera information corresponding to the lane through the antenna closest to the tag, judging whether the vehicle is illegal, and if so, triggering a snapshot node to complete the snapshot of the vehicle to obtain illegal picture records.
2. The method as claimed in claim 1, wherein the lane in which the vehicle is traveling is determined by the antenna closest to the tag and the camera information corresponding to the lane comprises
Step S1: performing radio frequency node triggering when the tag distance reaches a preset radio frequency triggering distance, determining a triggering antenna, performing first round conversion between antenna-antenna deployment directions by taking the antenna number of the triggering antenna as input, and screening out the antennas with the same deployment direction as the triggering antenna;
step S2: and determining the antenna closest to the tag in the antennas in the same deployment direction of the trigger antennas, performing second-round conversion of antenna-camera number-vehicle type by taking the antenna number of the antenna closest to the tag as input, and determining a driving lane corresponding to the antenna closest to the tag, a camera number corresponding to the lane and a lane type corresponding to the camera number.
3. The method as claimed in claim 2, wherein the step of determining whether the vehicle is illegal, and if so, triggering a snapshot node, and completing the snapshot of the vehicle through a camera comprises:
step S3: and judging whether the non-motor vehicle forms road occupation illegal behaviors or not by comparing whether the lane type corresponding to the camera number is consistent with the vehicle type in the label information or not, if so, forming illegal behaviors, and if so, performing third-round conversion by taking the camera number as input, determining the quantity of law enforcement pictures snapshoted by the road occupation behaviors, and entering a snapshotting node.
4. The method as claimed in claim 1, wherein the antenna closest to the tag is determined by the maximum RSSI value or the maximum number of times the tag is checked by the antenna.
5. The method as claimed in claim 1, further comprising presetting a correspondence relationship between an antenna and a lane type and the number of illegal shots taken by the camera, wherein the correspondence relationship includes a mutual conversion relationship between an antenna number, an antenna direction, a camera number and a lane type.
6. The method as claimed in claim 1, wherein the rf tag information includes vehicle information and rf phase information, wherein the vehicle information includes license plate number, vehicle type, vehicle color, tag card number, and vehicle date of leaving factory, and the rf phase information is used to calculate phase data to obtain the distance between the vehicle and the antenna.
7. The method as claimed in claim 3, wherein the snapshot node is divided into a command non-issuing state, a command issuing ending state and a snapshot ending state according to the number of the snapshot law enforcement pictures and the snapshot command issuing time, and the snapshot ending state is followed.
8. The method as claimed in claim 1, further comprising integrating tag information, camera information and illegal picture records of the vehicle after the snapshot is completed, and reporting the tag information, the camera information and the illegal picture records to the background management software through an ethernet link.
9. A recognition and recording system for illegal lane occupation of non-motor vehicles is characterized by comprising
The radio frequency module is used for periodically checking radio frequency tag information, determining the distance between the vehicle and the antenna according to the radio frequency tag information, triggering a radio frequency node when the distance reaches a preset radio frequency triggering distance, acquiring the antenna closest to the tag, determining a lane where the vehicle runs and camera information corresponding to the lane through the antenna closest to the tag, judging whether the vehicle can be illegal or not, and generating an illegal snapshot signal if the vehicle is illegal;
and the snapshot module is used for receiving the illegal snapshot signal of the radio frequency module, completing the snapshot of the vehicle according to the preset snapshot data and the snapshot time node, and uploading the snapshot picture to the radio frequency module.
And the recording module is used for integrating and storing the label information of the vehicle of the radio frequency module, the corresponding camera information and the illegal picture record and reporting the integrated information to the management module.
And the management module is used for receiving the data reported by the recording module and analyzing and managing the data.
10. An equipment for recognizing and recording illegal road occupation behavior of non-motor vehicles, which is characterized in that the method based on any one of claims 1 to 8 comprises
Each radio frequency antenna is opposite to the lane and is used for periodically checking the radio frequency tag information;
the camera is arranged between any two radio frequency antennas and used for capturing illegal vehicles.
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