CN109686100B - Moving vehicle lane position distinguishing method and system based on vehicle electronic identification - Google Patents
Moving vehicle lane position distinguishing method and system based on vehicle electronic identification Download PDFInfo
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- CN109686100B CN109686100B CN201811612331.5A CN201811612331A CN109686100B CN 109686100 B CN109686100 B CN 109686100B CN 201811612331 A CN201811612331 A CN 201811612331A CN 109686100 B CN109686100 B CN 109686100B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
Abstract
The invention discloses a method and a system for distinguishing a lane position of a moving vehicle based on vehicle electronic identification, wherein the method comprises the following steps: capturing a reflected signal sent by an electronic identifier of a moving vehicle according to a preset radio frequency signal in real time through a plurality of signal antennas arranged above a plurality of lanes; the signal antennas correspond to the lanes one to one; demodulating the reflected signals into orthogonal two paths of I/Q signals through orthogonal demodulation; calculating the phase information of the corresponding reflected signals according to the orthogonal two paths of I/Q signals; calculating the phase difference corresponding to the reflected signals of two adjacent moments captured by each of the plurality of signal antennas; comparing the phase difference corresponding to each of the plurality of signal antennas, and determining the lane where the vehicle is located according to the signal antennas; the method and the system have high environmental applicability, and further carry out targeted lane position monitoring on the specific vehicle through the uniqueness of the vehicle electronic identification, thereby providing directions for future traffic management.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a system for distinguishing a lane position of a moving vehicle based on vehicle electronic identification.
Background
The vehicle electronic identification is equivalent to an identity card of a vehicle, is popularized and used nationwide, and is beneficial to the management of traffic control departments on the vehicle, in particular to the identification of illegal behaviors such as traffic violation, fake plate/fake plate and the like. Vehicle electronic identification reading and writing equipment is installed at a high-speed intersection or a traffic monitoring intersection;
in the existing traffic management system, the vehicles are monitored mainly by continuously photographing the same vehicle, confirming the specific position of the vehicle by image recognition and other technologies, and identifying the specific information of the vehicle by recognizing a license plate; and some illegal vehicles pass through fake plates, fake plates and even shielding plates, or the shooting is not clear in special environments such as night, fog and the like, so that the specific positions of the vehicles cannot be effectively identified, and whether the vehicles are on the lanes where the vehicles should run or not cannot be judged.
Disclosure of Invention
In order to solve the problem that the existing method for identifying the vehicle and further judging the position of the vehicle by the image identification technology in the background technology cannot effectively monitor in a special environment or under the condition that the vehicle is intentionally avoided, the invention provides a method and a system for judging the lane position of a moving vehicle based on vehicle electronic identification, wherein the method and the system confirm the identity of the vehicle by identifying the vehicle electronic identification, and solve the difficulty of identifying the vehicle by the image under the special condition; through communication with the electronic identification, the position of a lane where the vehicle is located is further obtained; the method for measuring the speed of the moving vehicle in real time based on the vehicle electronic identification comprises the following steps:
capturing a reflected signal sent by an electronic identifier of a moving vehicle according to a preset radio frequency signal in real time through a plurality of signal antennas arranged above a plurality of lanes; the signal antennas correspond to the lanes one to one;
demodulating the reflected signals into orthogonal two paths of I/Q signals through orthogonal demodulation; calculating the phase information of the corresponding reflected signals according to the orthogonal two paths of I/Q signals;
calculating the phase difference corresponding to the reflected signals of two adjacent moments captured by each of the plurality of signal antennas;
and comparing the phase difference corresponding to each of the plurality of signal antennas, and determining the lane where the vehicle is located according to the signal antennas.
Further, capturing a plurality of reflected signals sent by electronic identifiers of different moving vehicles according to a preset radio frequency signal; the reflected signal includes electronic identification information that transmitted the signal;
classifying the multiple reflection signals according to electronic identification information carried by the reflection signals to obtain multiple reflection signals under the same electronic identification;
calculating the phase difference corresponding to the reflected signals of two adjacent moments under the same electronic identification captured by each of the plurality of signal antennas;
and comparing the phase difference corresponding to each of the plurality of signal antennas, and determining the lane where the vehicle under the electronic identification is located according to the signal antennas.
Further, before capturing, in real time, a reflected signal emitted from the moving vehicle electronic identifier according to a preset radio frequency signal by a plurality of signal antennas arranged above a plurality of lanes, the method further includes:
and transmitting preset radio frequency signals in real time through one or more signal antennas arranged above the vehicle road.
Further, by performing arc tangent operation on the two orthogonal paths of I/Q signals, phase information of reflected signals corresponding to the two orthogonal paths of I/Q signals is obtained.
Further, in the phase difference corresponding to each of the plurality of signal antennas, a lane where the signal antenna corresponding to the maximum value of the phase difference is located is the lane where the vehicle is located.
The moving vehicle lane position distinguishing system based on the vehicle electronic identification comprises:
the electronic identification reading and writing unit is used for capturing a reflected signal sent by the electronic identification of the moving vehicle according to a preset radio frequency signal in real time through a plurality of signal antennas arranged above a plurality of lanes; the signal antennas correspond to the lanes one to one;
the phase calculation unit is used for demodulating the reflected signals into orthogonal two paths of I/Q signals through orthogonal demodulation; calculating the phase information of the corresponding reflected signals according to the orthogonal two paths of I/Q signals;
the phase calculation unit is used for calculating phase differences corresponding to the reflected signals of two adjacent moments captured by each of the plurality of signal antennas;
and the lane judgment unit is used for comparing the phase difference corresponding to each of the plurality of signal antennas output by the phase calculation unit and determining the lane where the vehicle is located according to the signal antennas.
Furthermore, the electronic identification reading and writing unit is used for capturing a plurality of reflected signals sent by electronic identifications of different moving vehicles according to preset radio frequency signals; the reflected signal includes electronic identification information that transmitted the signal;
the phase calculation unit is used for classifying the multiple reflection signals according to electronic identification information carried by the reflection signals to obtain multiple reflection signals under the same electronic identification;
the phase calculation unit is used for calculating the phase difference corresponding to the reflected signals of two adjacent moments under the same electronic identification and captured by each of the plurality of signal antennas;
the lane judging unit is used for comparing the phase difference corresponding to each of the plurality of signal antennas and determining the lane where the vehicle under the electronic mark is located according to the signal antennas.
Furthermore, the electronic identification reading and writing unit is used for sending preset radio frequency signals in real time through one or more signal antennas arranged above a vehicle road.
Further, the phase calculation unit is configured to perform arc tangent operation on the two orthogonal I/Q signals to obtain phase information of the reflected signals corresponding to the two orthogonal I/Q signals.
Further, the lane determination unit selects, as a lane in which the vehicle is located, a lane in which the signal antenna corresponding to the maximum phase difference among the phase differences corresponding to the respective plurality of signal antennas.
The invention has the beneficial effects that: the technical scheme of the invention provides a method and a system for distinguishing the lane position of a moving vehicle based on vehicle electronic identification, wherein the method and the system confirm the identity of the vehicle by identifying the vehicle electronic identification, thereby solving the difficulty of image recognition of the vehicle under special conditions; the position of a lane where the vehicle is located is further judged according to a preset algorithm through the communication between the signal antennas and the vehicle electronic identification; the method and the system have high environmental applicability, and further carry out targeted lane position monitoring on the specific vehicle through the uniqueness of the vehicle electronic identification, thereby providing directions for future traffic management.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flowchart of a method for determining a lane position of a moving vehicle based on electronic vehicle identification according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a method for determining a lane position of a moving vehicle based on electronic vehicle identification according to an embodiment of the present invention;
fig. 3 is a structural diagram of a system for determining a lane position of a moving vehicle based on an electronic vehicle identifier according to an embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including 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. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
FIG. 1 is a flowchart of a method for determining a lane position of a moving vehicle based on electronic vehicle identification according to an embodiment of the present invention; as shown in fig. 1, the method includes:
prior to step 110, the method further comprises: and transmitting preset radio frequency signals in real time through one or more signal antennas arranged above the vehicle road.
The electronic identification of the vehicle is a chip based on RFID technology; reflecting the signal by receiving the radio frequency signal; the preset radio frequency signal can be transmitted by one or more signal antennas, and the vehicle feeds back each received radio frequency signal;
in this embodiment, as shown in fig. 2, each of the multiple signal antennas disposed above the multiple lanes is in one-to-one correspondence with the lane, that is, one signal antenna is disposed above each lane, and each of the multiple signal antennas is controlled by the same electronic tag reader, so that clocks of signals received by each signal antenna are consistent, and it can be determined whether the antennas received by the multiple signal antennas are transmitted at the same time by the same electronic tag according to the signal clock and the signal content.
in the embodiment, two orthogonal paths of I/Q signals capable of carrying out phase information calculation are obtained by carrying out orthogonal adjustment on the reflection signals; and performing arc tangent operation on the two orthogonal I/Q signals to obtain phase information of the reflected signals corresponding to the two orthogonal I/Q signals.
According to the difference of the receiving signal antennas, the reflected signals can be distinguished, and further, phase information corresponding to the reflected signals can be distinguished;
the specific time of the two adjacent times corresponds to the same of each signal antenna because of the same clock signal; and the phase difference is obtained in the same time interval of a plurality of signals; the adjacent time can be two nearest time so as to calculate the latest vehicle lane position judgment.
And 140, comparing the phase difference corresponding to each of the plurality of signal antennas, and determining the lane where the vehicle is located according to the signal antennas.
Furthermore, since the phase information is in a linear relationship with the signal transmission distance (i.e. the linear distance between the electronic tag and the signal antenna), the signal transmission distance is the closest to the phase information with the largest phase difference, and among the phase differences corresponding to the plurality of signal antennas, the lane where the signal antenna with the largest phase difference is located is the lane where the vehicle is located.
Further, considering a case where a plurality of vehicles travel on a road simultaneously, the method includes:
capturing a plurality of reflected signals sent by electronic identifiers of different moving vehicles according to a preset radio frequency signal; the reflected signal includes electronic identification information that transmitted the signal;
classifying the multiple reflection signals according to electronic identification information carried by the reflection signals to obtain multiple reflection signals under the same electronic identification;
calculating the phase difference corresponding to the reflected signals of two adjacent moments under the same electronic identification captured by each of the plurality of signal antennas;
and comparing the phase difference corresponding to each of the plurality of signal antennas, and determining the lane where the vehicle under the electronic identification is located according to the signal antennas.
Fig. 3 is a block diagram of a system for determining lane positions of a moving vehicle based on vehicle electronic identification according to an embodiment of the present invention, as shown in fig. 3, the system includes:
the electronic identification reading and writing unit 310 is used for capturing a reflected signal sent by an electronic identification of a moving vehicle according to a preset radio frequency signal in real time through a plurality of signal antennas arranged above a plurality of lanes; the signal antennas correspond to the lanes one to one;
further, the electronic identification reading and writing unit 310 is configured to send a preset radio frequency signal in real time through one or more signal antennas disposed above the vehicle road.
A phase calculation unit 320, wherein the phase calculation unit 320 is configured to demodulate the reflected signal into two orthogonal I/Q signals through quadrature demodulation; calculating the phase information of the corresponding reflected signals according to the orthogonal two paths of I/Q signals;
further, the phase calculating unit 320 is configured to perform arc tangent operation on the two orthogonal I/Q signals to obtain phase information of the reflected signals corresponding to the two orthogonal I/Q signals.
The phase calculating unit 320 is configured to calculate a phase difference corresponding to the reflected signals at two adjacent time instants captured by each of the multiple signal antennas;
a lane determining unit 330, where the lane determining unit 330 is configured to compare the phase difference corresponding to each of the plurality of signal antennas output by the phase calculating unit 320, and determine a lane where the vehicle is located according to the signal antennas.
Further, the lane determining unit 330 selects, as the lane where the vehicle is located, a lane where the signal antenna corresponding to the maximum phase difference value is located, from among the phase differences corresponding to the plurality of signal antennas.
Further, consider when multiple vehicles are traveling on the lane again at the same time:
further, the electronic identifier reading and writing unit 310 is configured to capture a plurality of reflected signals sent by electronic identifiers from different moving vehicles according to a preset radio frequency signal; the reflected signal includes electronic identification information that transmitted the signal;
the phase calculation unit 320 is configured to classify the multiple reflection signals according to electronic identification information carried by the reflection signals, so as to obtain multiple reflection signals under the same electronic identification;
the phase calculating unit 320 is configured to calculate a phase difference corresponding to the reflected signals of two adjacent moments under the same electronic identifier captured by each of the multiple signal antennas;
the lane determining unit 330 is configured to compare the phase difference corresponding to each of the multiple signal antennas, and determine a lane where the vehicle under the electronic identifier is located according to the signal antenna.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Reference to step numbers in this specification is only for distinguishing between steps and is not intended to limit the temporal or logical relationship between steps, which includes all possible scenarios unless the context clearly dictates otherwise.
Moreover, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the disclosure and form different embodiments. For example, any of the embodiments claimed in the claims can be used in any combination.
Various component embodiments of the disclosure may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. The present disclosure may also be embodied as device or system programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present disclosure may be stored on a computer-readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the disclosure, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The disclosure may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several systems, several of these systems may be embodied by one and the same item of hardware.
The foregoing is directed to embodiments of the present disclosure, and it is noted that numerous improvements, modifications, and variations may be made by those skilled in the art without departing from the spirit of the disclosure, and that such improvements, modifications, and variations are considered to be within the scope of the present disclosure.
Claims (6)
1. A method for vehicle electronic identification based lane position determination for a moving vehicle, the method comprising:
capturing a reflected signal sent by an electronic identifier of a moving vehicle according to a preset radio frequency signal in real time through a plurality of signal antennas arranged above a plurality of lanes; the signal antennas correspond to the lanes one to one;
demodulating the reflected signals into orthogonal two paths of I/Q signals through orthogonal demodulation; calculating the phase information of the corresponding reflected signals according to the orthogonal two paths of I/Q signals;
calculating the phase difference corresponding to the reflected signals of two adjacent moments captured by each of the plurality of signal antennas;
comparing the phase difference corresponding to each of the plurality of signal antennas, and determining the lane where the vehicle is located according to the signal antennas;
capturing a plurality of reflected signals sent by electronic identifiers of different moving vehicles according to a preset radio frequency signal; the reflected signal includes electronic identification information that transmitted the signal;
classifying the multiple reflection signals according to electronic identification information carried by the reflection signals to obtain multiple reflection signals under the same electronic identification;
calculating the phase difference corresponding to the reflected signals of two adjacent moments under the same electronic identification captured by each of the plurality of signal antennas;
comparing the phase difference corresponding to each of the plurality of signal antennas, and determining the lane where the vehicle under the electronic identification is located according to the signal antennas;
in the phase difference corresponding to each of the plurality of signal antennas, the lane where the signal antenna corresponding to the maximum value of the phase difference is located is the lane where the vehicle is located.
2. The method of claim 1, wherein: before capturing, in real time, a reflected signal emitted from the moving vehicle electronic identifier according to a preset radio frequency signal by a plurality of signal antennas arranged above a plurality of lanes, the method further comprises:
and transmitting preset radio frequency signals in real time through one or more signal antennas arranged above the vehicle road.
3. The method of claim 1, wherein: and performing arc tangent operation on the two orthogonal I/Q signals to obtain phase information of the reflected signals corresponding to the two orthogonal I/Q signals.
4. A moving vehicle lane position discrimination system based on vehicle electronic identification, the system comprising:
the electronic identification reading and writing unit is used for capturing a reflected signal sent by the electronic identification of the moving vehicle according to a preset radio frequency signal in real time through a plurality of signal antennas arranged above a plurality of lanes; the signal antennas correspond to the lanes one to one;
the phase calculation unit is used for demodulating the reflected signals into orthogonal two paths of I/Q signals through orthogonal demodulation; calculating the phase information of the corresponding reflected signals according to the orthogonal two paths of I/Q signals;
the phase calculation unit is used for calculating phase differences corresponding to the reflected signals of two adjacent moments captured by each of the plurality of signal antennas;
the lane judging unit is used for comparing the phase difference corresponding to each of the plurality of signal antennas output by the phase calculating unit and determining the lane where the vehicle is located according to the signal antennas;
the electronic identification reading and writing unit is used for capturing a plurality of reflected signals sent by electronic identifications of different moving vehicles according to preset radio frequency signals; the reflected signal includes electronic identification information that transmitted the signal;
the phase calculation unit is used for classifying the multiple reflection signals according to electronic identification information carried by the reflection signals to obtain multiple reflection signals under the same electronic identification;
the phase calculation unit is used for calculating the phase difference corresponding to the reflected signals of two adjacent moments under the same electronic identification and captured by each of the plurality of signal antennas;
the lane judging unit is used for comparing the phase difference corresponding to each of the plurality of signal antennas and determining the lane where the vehicle under the electronic mark is located according to the signal antennas;
the lane determining unit selects a lane where the signal antenna corresponding to the maximum phase difference value is located as a lane where the vehicle is located, among the phase differences corresponding to the plurality of signal antennas.
5. The system of claim 4, wherein: the electronic identification read-write unit is used for transmitting preset radio frequency signals in real time through one or more signal antennas arranged above a vehicle road.
6. The system of claim 4, wherein: the phase calculation unit is used for performing arc tangent operation on the two orthogonal I/Q signals to obtain phase information of the reflected signals corresponding to the two orthogonal I/Q signals.
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