CN111477022A - Embedded special vehicle priority running system based on dynamic traffic information network - Google Patents
Embedded special vehicle priority running system based on dynamic traffic information network Download PDFInfo
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- CN111477022A CN111477022A CN202010265524.9A CN202010265524A CN111477022A CN 111477022 A CN111477022 A CN 111477022A CN 202010265524 A CN202010265524 A CN 202010265524A CN 111477022 A CN111477022 A CN 111477022A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/087—Override of traffic control, e.g. by signal transmitted by an emergency vehicle
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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
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
Abstract
The invention discloses an embedded special vehicle priority running system based on a dynamic traffic information network, which comprises a license plate recognition system, a data processing unit, a database unit, a signal lamp control system and a wireless signal transmitting system, wherein the license plate recognition system photographs and recognizes a license plate, sends the license plate to the data processing unit, compares information of a special vehicle, sends an instruction to the signal lamp control system to change the state of a signal lamp, the signal lamp control system receives a signal of the data processing unit to change the state of the signal lamp, and the wireless signal transmitting system transmits a vehicle photograph to a traffic control center for extraction and recognition; the invention embeds the vehicle priority running system into the dynamic traffic information network system, utilizes the original traffic equipment in the dynamic traffic information network system to identify the special vehicle, and changes the signal lamp in time to ensure that the special vehicle such as an ambulance, a fire engine and the like can safely and rapidly pass through the intersection when executing tasks, and has the characteristics of cost saving, convenient use and convenient popularization.
Description
Technical Field
The invention belongs to the technical field of traffic system management, and particularly relates to an embedded special vehicle priority running system based on a dynamic traffic information network.
Background
Red light stop and green light running are the most basic traffic rules, and pedestrians and vehicles need to obey; however, there are exceptions, according to the fifty-third provisions of the national road traffic safety act, special vehicles such as police cars, fire trucks, ambulances, engineering wreckers, etc. have road priority right of way without being limited by driving routes, driving directions, driving speeds and signals on the premise of ensuring safety when performing tasks;
the law gives the special vehicles the priority right to pass on the road, so that the vehicles for executing emergency tasks can arrive at the accident site more quickly and more safely; however, when a special vehicle performs a task, a horn is sounded to pass through the intersection, which is a very dangerous behavior and is a frequent accident;
the existing traffic lights are traditional delayed traffic systems, signal lights cannot be changed according to actual traffic conditions, when a special vehicle executes a task, in order to ensure that the special vehicle reaches a task area in time, the law provides that the special vehicle is not limited by the traffic signal lights, but when a social vehicle in front of the special vehicle is at a red light such as an intersection, a fire truck or an ambulance behind the special vehicle may not be found, even if the opposite side is a green light, traffic flow is avoided everywhere, a new traffic accident is caused, the special vehicle cannot reach the site in time, and the special vehicle is delayed to reach the task area in time:
in 1.2017, 10 months and 10 days, 35 minutes are at the intersection of the great-distance apricot garden in the Tongzhou district century of Nantong city in Jiangsu province, an ambulance in the people hospital in the Tongzhou district goes from north to south to receive patients, and the alarm lamps and alarms are all turned on when the patients pass through the intersection. The ambulance collides with a transversely passing private car and turns over;
at 25/9/2.2018, an intersection in Huai' an, Jiangsu. A120 ambulance carrying a sick newborn does not decelerate when encountering a red light, but still travels through the intersection at a faster speed. The vehicle runs according to the signal lamp, and finally the ambulance and the vehicle collide;
a120 ambulance loaded with an emergency patient is arranged at an intersection of Kun mountain Kun Tai road and cottage road of 10 and 11 am in 3.2018, the 120 ambulance runs from north to south along the cottage road, a traffic light in the running direction is a red light and collides with a white car, and the ambulance turns on one side after being knocked down;
therefore, an embedded special vehicle priority running system based on a dynamic traffic information network is urgently needed, the special vehicle can be identified, the traffic of the road junction can be temporarily controlled by changing the signal lamp in time, and the special vehicles such as an ambulance, a fire truck and the like can safely and quickly pass through the road junction when executing tasks.
Disclosure of Invention
Aiming at the existing problems, the invention aims to provide an embedded type special vehicle priority running system based on a dynamic traffic information network, which comprises a license plate recognition system, a data processing unit, a database unit, a signal lamp control system and a wireless signal transmitting system.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the embedded special vehicle priority running system based on the dynamic traffic information network comprises a license plate recognition system, a data processing unit, a database unit, a signal lamp control system and a wireless signal transmitting system;
license plate identification system: utilizing a camera of a traffic system to photograph the license plate, extracting the license plate number in the photograph and sending the license plate number to a data processing unit;
a data processing unit: the identified license plate number is compared with the information of the special vehicle recorded in the database, and after the comparison is completed, an instruction is sent to a signal lamp control system to change the state of a signal lamp;
the signal lamp control system: the signal of the data processing unit is received and is connected with the existing signal lamp, and the state of the signal lamp is changed according to the guidance information of the data processing unit, so that the special vehicle can pass through the signal lamp quickly and safely;
wireless signal transmitting system: transmitting the vehicle photos of the traffic intersection to a traffic control center of the dynamic traffic information network system for extraction and identification, and transmitting the instructions of the traffic control center of the dynamic traffic information network system to traffic signal lamps;
a database unit: the database used for storing the special license plate can manage the priority right of passage of the special vehicle by adding and deleting license plate information.
Furthermore, the license plate recognition system comprises an embedded operating system EOS, OpenCV software and upper computer software, wherein the control input end of the embedded operating system EOS is connected with the command output end of the upper computer software, and the control output end of the embedded operating system EOS is connected with the control input end of the dynamic traffic information network system; the OpenCV software is connected with the command input end and the command output end of the upper computer software.
Further, the OpenCV software is used for processing the special vehicle pictures shot by the camera and extracting the license plate number; the camera is used for monitoring violation of regulations at the current intersection in the dynamic traffic information network system.
Further, the process of storing and numbering the license plate numbers by the database unit is as follows:
the method comprises the following steps: inputting information and license plate number of a special vehicle, correspondingly generating a data packet of the special vehicle, and naming the data packet by the license plate number;
step two: arranging the data packets in the database unit into a matrix of 2 x 5 according to different sequences of 0-9 initials, and setting the matrix as the matrix
Step three: let 0XXXX be the new matrix a0 and arrange it in a 2 x 5 matrix according to the second letter of the license plate number in a0 in a different sequence from 0 to 9, i.e. a matrix
Step four: let 00XXX be a new matrix B0 and arrange the matrices in 2 x 5 according to the third letter of the license plate number in B0 and different sequences from 0 to 9, namely, the matrix B0
Then, the matrix A-matrix J9 is obtained by arranging the fourth letter and the fifth letter of the license plate in the sequence of 2 x 5 according to different sequences of 0-9.
Further, the specific process of the data processing unit for comparing the identified license plate number with the information of the special vehicle recorded in the database is as follows:
the method comprises the following steps: iteratively searching a matrix corresponding to the license plate number according to the sequence of 1-5 letters of the extracted license plate number and sequentially corresponding to the matrixes A … …, B … … and … … J … …;
step two: after the data packet of the corresponding license plate number is matched in an iterative way, the information of the vehicle is read, and the matrix position where the matched license plate number is located is marked, namely the information comparison process of the identified license plate number and the special vehicle recorded in the database by the data processing unit is completed;
wherein: the iteration number of the iteration process is 5, and after 5 iterations, the corresponding license plate number cannot be matched, namely the license plate number is considered to be a non-special vehicle.
Furthermore, the signal lamp control system comprises a signal control unit and a signal control device, wherein a command input end of the signal control unit is connected with a command output end of the data processing unit, and a command output end of the signal control unit controls the signal control device to be opened or closed so as to change the state of the signal lamp.
Furthermore, the signal control device comprises a controller, a signal lamp mounting plate, a mounting frame, an electric signal control assembly and an electromagnetic signal control assembly, wherein the controller controls the electric signal control assembly and the electromagnetic signal control assembly to work and adjust the color of a signal lamp, and the electric signal control assembly and the electromagnetic signal control assembly are both mounted on the mounting frame; the signal lamp mounting plate comprises a red lamp mounting section, a yellow lamp mounting section and a green lamp mounting section.
Furthermore, the electric signal control assembly comprises a motor, a gear and a rack, wherein the command input end of the motor is connected with the controller, the gear is installed at the transmission end of the motor, teeth on the rack are meshed with tooth grooves on the gear, a connecting bulge, a wire installation groove and a clamping groove are arranged on the rack, the bottom end of the connecting bulge is communicated with the wire installation groove, and a copper guide sheet is arranged on the connecting bulge and connected with the end part of a wire installed in the wire installation groove; the copper guide sheet is matched with a first red light touch reed, a first yellow light touch reed and a first green light touch reed which are arranged on the signal lamp mounting plate for use respectively, and when the copper guide sheet is contacted with any one of the first red light touch reed, the first yellow light touch reed and the first green light touch reed, the indicator lamp is lightened; and the mounting bracket is provided with a rack mounting groove, a clamping bulge is arranged in the groove of the rack mounting groove, and the clamping bulge is matched with the clamping groove for use.
Furthermore, the electromagnetic signal control assembly comprises a valve plate mounting frame, a magnet and a spring, wherein an electromagnetic valve plate is arranged on the valve plate mounting frame, and the magnetic pole of the electrified electromagnetic valve plate is opposite to that of the magnet; the mounting frame is provided with a magnet telescopic groove and a first touch connecting sheet, the magnet is sleeved with a spring and is installed in the magnet telescopic groove, the magnet is also provided with a second touch connecting sheet matched with the first touch connecting sheet for use, when the first touch connecting sheet is contacted with the second touch connecting sheet, a copper guide sheet arranged at the end part of the magnet generates current, the copper guide sheet is matched with a second red light touch reed, a second yellow light touch reed and a second green light touch reed which are arranged on the signal lamp mounting plate for use respectively, and when the copper guide sheet is contacted with any one of the second red light touch reed, the second yellow light touch reed and the second green light touch reed, the indicator lamp is lightened; the magnet is further provided with a limiting protrusion, when the magnet is installed in the magnet telescopic groove, the limiting protrusion limits the right part of the magnet, and the first contact connecting piece is in contact with the second contact connecting piece.
Furthermore, the controller is a multi-output control port STM32 singlechip and comprises a power command output port and an electric signal command output port, the power command output port is communicated with the electric signal control assembly, and the electric signal command output port is communicated with the electromagnetic signal control assembly.
The invention has the beneficial effects that: the invention discloses an embedded special vehicle priority running system based on a dynamic traffic information network, and compared with the prior art, the invention has the improvement that:
(1) the invention designs a special vehicle priority running system which can be fused with the existing dynamic traffic information network system, and fuses the two systems by using an embedded operating system EOS (Ethernet over Ethernet) and identifies the license plate number by using the existing traffic camera, so that the cost is lower, a special sensing device is not required to be installed at the intersection, and a corresponding identification tag is not required to be installed on the special vehicle, therefore, the system is more convenient and more convenient to use and is convenient to popularize;
(2) by the system, when the special vehicle passes through the red light, the state of the traffic signal lamp is changed, so that the special vehicle has enough time to pass through safely and quickly, the working efficiency of the special vehicle is ensured, and meanwhile, the occurrence of traffic accidents is effectively reduced;
(3) in the system, when the special vehicle needs to be updated, the management of the passing priority of the special vehicle can be realized only by adding and deleting corresponding data in the database, and the system is convenient to operate and simple to manage.
Drawings
FIG. 1 is a control flow chart of a priority running system of a special vehicle according to the present invention.
FIG. 2 is a schematic diagram of the license plate recognition system of the present invention.
Fig. 3 is a schematic diagram of the operation of the signal lamp control system of the present invention.
FIG. 4 is a schematic structural diagram of a priority running system of a special vehicle according to the present invention.
FIG. 5 is a schematic structural diagram of an electrical signal control assembly according to the present invention.
FIG. 6 is a schematic view of the structure of the motor and gear of the present invention.
Fig. 7 is a schematic view of the structure of the rack of the present invention.
Fig. 8 is a right side view of the rack of the present invention.
Fig. 9 is a front view of the signal mounting plate of the present invention.
Fig. 10 is a left side view of the signal lamp mounting plate of the present invention.
FIG. 11 is a schematic structural diagram of an electromagnetic signal control assembly according to the present invention.
Fig. 12 is a cross-sectional view of the mounting bracket of the present invention with the magnet installed.
Fig. 13 is a cross-sectional view of a mount of the present invention.
Fig. 14 is a front view of the magnet of the present invention.
Fig. 15 is a schematic structural view of the mounting bracket of the present invention.
Wherein: 1. the electromagnetic valve comprises a motor, 2, a gear, 3, a rack, 31, a connecting protrusion, 32, a wire installing groove, 33, a clamping groove, 4, a signal lamp installing plate, 41, a red lamp installing section, 411, a first red lamp touch reed, 412, a second red lamp touch reed, 42, a yellow lamp installing section, 421, a first yellow lamp touch reed, 422, a second yellow lamp touch reed, 43, a green lamp installing section, 431, a first green lamp touch reed, 432, a second green lamp touch reed, 5, a valve plate installing frame, 51, an electromagnetic valve plate, 6, an installing frame, 61, a magnet telescopic groove, 62, a first touch reed, 63, a rack installing groove, 631, a clamping protrusion, 7, a magnet, 71, a limiting protrusion and 72, and a second touch reed.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.
Referring to fig. 1-15, an embedded special vehicle priority driving system based on a dynamic traffic information network includes a license plate recognition system, a data processing unit, a database unit, a signal lamp control system and a wireless signal transmitting system;
license plate identification system: when a vehicle passes by, a camera of the existing traffic information network system is used for shooting a photo, the photo is submitted to be processed by OpenCV software, a license plate number in the photo is extracted, and the license plate number is sent to the data processing unit;
a data processing unit: the identified license plate number is compared with the information of the special vehicle recorded in the database, and after the comparison is completed, an instruction is sent to a signal lamp control system to change the state of a signal lamp;
the signal lamp control system: the signal of the data processing unit is received and is connected with the existing signal lamp, and the state of the signal lamp is changed according to the guidance information of the data processing unit, so that the special vehicle can pass through the signal lamp quickly and safely;
wireless signal transmitting system: transmitting the vehicle photos of the traffic intersection to a traffic control center of the dynamic traffic information network system for extraction and identification, and transmitting the instructions of the traffic control center of the dynamic traffic information network system to traffic signal lamps;
a database unit: the database used for storing the special license plate can manage the priority right of passage of the special vehicle by adding and deleting license plate information.
The license plate recognition system comprises an embedded operating system EOS, OpenCV software and upper computer software, wherein the control input end of the embedded operating system EOS is connected with the command output end of the upper computer software, and the control output end of the embedded operating system EOS is connected with the control input end of the dynamic traffic information network system; the OpenCV software is connected with the command input end and the command output end of the upper computer software, and the upper computer software is used for controlling the OpenCV software;
the OpenCV software is used for processing special vehicle photos shot by the camera and extracting license plate numbers, and the specific processes of identifying the license plate numbers comprise license plate extraction, character segmentation and character identification processes, namely, the license plate number is firstly found in the collected photos containing the license plate, then the license plate part is segmented, the characters on the license plate are segmented one by one, and finally the segmented characters are identified one by one; the camera is used for monitoring the violation of regulations at the current intersection in the dynamic traffic information network system;
the processes of license plate extraction, character segmentation and character recognition are as follows:
the method comprises the following steps: carrying out binarization processing on the collected image, converting the color image into a gray image, setting the gray value of a pixel point on the image to be 0 or 255, and enabling the image to be obviously only black and white;
step two: then, carrying out shape recognition on the outline of each blank area, judging the rectangularity of the areas according to the ratio of the outline area to the external rectangle, further judging the length-width ratio, and determining the area meeting the conditions as a license plate area;
step three: extracting the part, equally dividing the part into 7 parts (the 7 parts are, for example, SHAAN X), namely, each part comprises a character, and then carrying out single recognition on the character;
step three: the recognized characters are assigned to character type data of each digit, and after all the characters are recognized, the characters are compared with data in a database respectively.
The process of storing and numbering the license plate numbers by the database unit is as follows (the algorithm only numbers the last 5 bits; specifically, if the license plate number is Shaan A, the algorithm only numbers and stores):
the method comprises the following steps: inputting information and license plate number of a special vehicle, correspondingly generating a data packet of the special vehicle, and naming the data packet by the license plate number;
step two: arranging the data packets in the database unit into a matrix of 2 x 5 according to different sequences of 0-9 initials, and setting the matrix as the matrix
Step three: let 0XXXX be the new matrix a0 and arrange it in a 2 x 5 matrix according to the second letter of the license plate number in a0 in a different sequence from 0 to 9, i.e. a matrix
Step four: let 00XXX be a new matrix B0 and arrange the matrices in 2 x 5 according to the third letter of the license plate number in B0 and different sequences from 0 to 9, namely, the matrix B0
Then, the matrix A-matrix J9 is obtained by arranging the fourth letter and the fifth letter of the license plate in the sequence of 2 x 5 according to different sequences of 0-9.
The specific process of the data processing unit for carrying out information comparison on the identified license plate number and the special vehicle recorded in the database is as follows:
the method comprises the following steps: iteratively searching a matrix corresponding to the license plate number according to the sequence of 1-5 letters of the extracted license plate number and sequentially corresponding to the matrixes A … …, B … … and … … J … …;
step two: after the data packet of the corresponding license plate number is matched in an iterative way, the information of the vehicle is read, and the matrix position where the matched license plate number is located is marked, namely the information comparison process of the identified license plate number and the special vehicle recorded in the database by the data processing unit is completed;
wherein: and in order to ensure an iteration result, the iteration times of the iteration process are 5 times, and after 5 times of iteration, the corresponding license plate number is not matched, namely the license plate number is considered to be a non-special vehicle.
The signal lamp control system comprises a signal control unit and a signal control device, wherein the command input end of the signal control unit is connected with the command output end of the data processing unit, and the command output end of the signal control unit controls the signal control device to be opened or closed so as to change the state of a signal lamp;
the signal control device comprises a controller, a signal lamp mounting plate 4, a mounting frame 6, an electric signal control assembly and an electromagnetic signal control assembly, wherein the controller simultaneously controls the electric signal control assembly and the electromagnetic signal control assembly to work, the electric signal control assembly and the electromagnetic signal control assembly are used for adjusting the color of a signal lamp, and the electric signal control assembly and the electromagnetic signal control assembly are both mounted on the mounting frame 6; the electric signal control assembly comprises a motor 1, a gear 2 and a rack 3, wherein a command input end of the motor 1 is connected with a controller, the controller controls the motor 1 to rotate, the gear 2 is installed at a transmission end of the motor 1, teeth on the rack 3 are meshed with tooth grooves on the gear 2, when the controller controls the motor 1 to rotate, the gear 2 rotates under the transmission action of the motor 1, and the rack 3 is driven to move up and down through the meshing force between the tooth grooves on the gear 2 and the teeth on the motor 1; the rack 3 is provided with a connecting bulge 31, a lead wire mounting groove 32 and a clamping groove 33, the bottom end of the connecting bulge 31 is communicated with the lead wire mounting groove 32, and the connecting bulge 31 is provided with a copper guide sheet which is connected with the end part of a lead wire mounted in the lead wire mounting groove 32, so that when the lead wire is electrified, current is synchronously generated on the copper guide sheet; the copper guide sheet is respectively matched with a first red light touch reed 411, a first yellow light touch reed 421 and a first green light touch reed 431 which are arranged on the signal lamp mounting plate 4 for use, namely when the copper guide sheet is contacted with any one of the first red light touch reed 411, the first yellow light touch reed 421 and the first green light touch reed 431, the touch reed forms a channel (electrified), and corresponding indicating lamps are lightened, so that when the copper guide sheet is used, the contact time of the connecting bulge 31 and each touch reed can be preset in the controller (namely after the connecting bulge 31 is contacted with the corresponding melt reed, the stay time of the connecting bulge 31 on the corresponding melt reed is controlled, namely the rotating speed of the motor is controlled); just be provided with rack mounting groove 63 on mounting bracket 6, the inslot of rack mounting groove 63 is provided with the protruding 631 of joint, and the protruding 631 of joint uses with the cooperation of joint groove 33, with 3 joints of rack in rack mounting groove 63 to the protruding 631 joint grooves 33 of joint slides from top to bottom during.
The electromagnetic signal control assembly comprises a valve plate mounting frame 5, a magnet 7 and a spring 8, wherein an electromagnetic valve plate 51 is arranged on the valve plate mounting frame 5, and the magnetic pole of the electrified electromagnetic valve plate 51 is opposite to the magnetic pole of the magnet 7 (namely, when the valve plate is electrified, the magnet 7 is adsorbed by the electromagnetic valve plate 51 due to the principle of opposite attraction); a magnet telescopic groove 61 and a first touch connecting sheet 62 are arranged on the mounting frame 6, a spring 8 is sleeved on the magnet 7 and is mounted in the magnet telescopic groove 61, a second touch connecting sheet 72 matched with the first touch connecting sheet 62 is further arranged on the magnet 7, namely, when the first touch connecting sheet 62 is contacted with the second touch connecting sheet 72, a copper guide sheet arranged at the end part of the magnet 7 generates current, and the copper guide sheet is matched with a second red light touch reed 412, a second yellow light touch reed 422 and a second green light touch reed 432 arranged on the signal lamp mounting plate 4 respectively, namely, when any one of the copper guide sheet is contacted with the second red light touch reed 412, the second yellow light touch reed 422 and the second green light touch reed 432, the corresponding indicating lamp is lightened; the magnet 7 is further provided with a limiting bulge 71, when the magnet 7 is installed in the magnet telescopic groove 61, the limiting bulge 71 limits the right part of the magnet 7, and after the electromagnetic valve plate 51 is disconnected, the magnet 7 is ensured to be in contact with the first touch connecting sheet 62 and the second touch connecting sheet 72 in the process of left, right and lower rebounding of the reset of the spring, namely, the corresponding signal lamp is lightened; the signal lamp mounting plate 4 includes a red lamp mounting section 41, a yellow lamp mounting section 42, and a green lamp mounting section 43.
The controller be many output control port STM32 singlechip, including power command output port and electric signal command output port, power command output port and electronic signal control assembly intercommunication, electric signal command output port and electromagnetic signal control assembly intercommunication, its control process includes:
(1) in the power control process (under normal conditions), according to the set lighting time of the corresponding indicator light, the motor 1 is controlled to rotate at the corresponding set speed, namely the gear 2 drives the rack 3 to move up and down, and the colloid of the connecting protrusion 31 is contacted with the first red light touch reed 411, the first yellow light touch reed 421 and the first green light touch reed 431, so that the yellow light, the yellow light and the green light are alternately changed;
(2) in the electromagnetic control process (under the condition of special vehicle running), after the controller receives the special vehicle priority running command of the signal control unit, namely, the power control process under the normal condition is stopped, the power supply of the electromagnetic valve plates 51 of the corresponding indicator lamps at the road sections in the corresponding direction is cut off according to the requirement (when in the non-working state, the 3 electromagnetic valve plates 51 are kept electrified), so that the corresponding magnet 7 is reset under the action of the spring 8, the first touch connecting sheet 62 is contacted with the second touch connecting sheet 72, the corresponding indicator light is electrified and brightened, when a corresponding special vehicle passes through, the switch of the corresponding electromagnetic valve plate 51 is switched on, stopping the electromagnetic control process, releasing the temporary control of the traffic signal lamp, continuing to execute the power control process under the normal condition, recovering the traffic signal lamp to be normal, and operating according to the preset delay time.
The working process of the embedded special vehicle priority running system based on the dynamic traffic information network comprises the following steps:
s1: the existing traffic cameras at the intersection take pictures of passing vehicles;
s2: the photos of the passing vehicles are transmitted to a traffic control center through a wireless transmitting system;
s3: extracting the license plate number in the photo by using software;
s4: comparing the extracted license plate number with the license plate number of the special vehicle in the database;
s5: after the matching is passed, the traffic signal lamps of corresponding intersections are controlled through the wireless transmitting system, and when the passing direction is a red light, a yellow light flashes to warn and then changes into a green light; when the traffic direction is green, the green time is kept, and the special vehicle has enough time to pass;
s6: after the special vehicle runs through the intersection, the temporary control on the traffic signal lamp is removed, the traffic signal lamp is recovered to be normal, and the special vehicle runs according to the preset delay time.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The embedded type special vehicle priority running system based on the dynamic traffic information network is characterized in that: the system comprises a license plate recognition system, a data processing unit, a database unit, a signal lamp control system and a wireless signal transmitting system;
license plate identification system: utilizing a camera of a traffic system to photograph the license plate, extracting the license plate number in the photograph and sending the license plate number to a data processing unit;
a data processing unit: the identified license plate number is compared with the information of the special vehicle recorded in the database, and after the comparison is completed, an instruction is sent to a signal lamp control system to change the state of a signal lamp;
the signal lamp control system: the signal of the data processing unit is received and is connected with the existing signal lamp, and the state of the signal lamp is changed according to the guidance information of the data processing unit, so that the special vehicle can pass through the signal lamp quickly and safely;
wireless signal transmitting system: transmitting the vehicle photos of the traffic intersection to a traffic control center of the dynamic traffic information network system for extraction and identification, and transmitting the instructions of the traffic control center of the dynamic traffic information network system to traffic signal lamps;
a database unit: the database used for storing the special license plate can manage the priority right of passage of the special vehicle by adding and deleting license plate information.
2. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 1, wherein: the license plate recognition system comprises an embedded operating system EOS, OpenCV software and upper computer software, wherein the control input end of the embedded operating system EOS is connected with the command output end of the upper computer software, and the control output end of the embedded operating system EOS is connected with the control input end of the dynamic traffic information network system; the OpenCV software is connected with the command input end and the command output end of the upper computer software.
3. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 2, wherein: the OpenCV software is used for processing the special vehicle pictures shot by the camera and extracting the license plate number; the camera is used for monitoring violation of regulations at the current intersection in the dynamic traffic information network system.
4. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 1, wherein: the process of storing and numbering the license plate numbers by the database unit is as follows:
the method comprises the following steps: inputting information and license plate number of a special vehicle, correspondingly generating a data packet of the special vehicle, and naming the data packet by the license plate number;
step two: arranging the data packets in the database unit into a matrix of 2 x 5 according to different sequences of 0-9 initials, and setting the matrix A as the matrix A
Step three: let 0XXXX be the new matrix a0 and arrange it in a 2 x 5 matrix according to the second letter of the license plate number in a0 in a different sequence from 0 to 9, i.e. a0 ═ 5
Step four: let 00XXX be a new matrix B0 and arrange the matrices in 2 x 5 according to the third letter of the license plate number in B0 and different sequences from 0 to 9, namely, the matrix B0
Then, the matrix A-matrix J9 is obtained by arranging the fourth letter and the fifth letter of the license plate in the sequence of 2 x 5 according to different sequences of 0-9.
5. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 4, wherein: the specific process of the data processing unit for carrying out information comparison on the identified license plate number and the special vehicle recorded in the database is as follows:
the method comprises the following steps: iteratively searching a matrix corresponding to the license plate number according to the sequence of 1-5 letters of the extracted license plate number and sequentially corresponding to the matrixes A … …, B … … and … … J … …;
step two: after the data packet of the corresponding license plate number is matched in an iterative way, the information of the vehicle is read, and the matrix position where the matched license plate number is located is marked, namely the information comparison process of the identified license plate number and the special vehicle recorded in the database by the data processing unit is completed;
wherein: the iteration number of the iteration process is 5, and after 5 iterations, the corresponding license plate number cannot be matched, namely the license plate number is considered to be a non-special vehicle.
6. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 1, wherein: the signal lamp control system comprises a signal control unit and a signal control device, wherein a command input end of the signal control unit is connected with a command output end of the data processing unit, and a command output end of the signal control unit controls the signal control device to be opened or closed so as to change the state of the signal lamp.
7. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 6, wherein: the signal control device comprises a controller, a signal lamp mounting plate (4), a mounting frame (6), an electric signal control assembly and an electromagnetic signal control assembly, wherein the controller controls the electric signal control assembly and the electromagnetic signal control assembly to work and adjust the color of a signal lamp, and the electric signal control assembly and the electromagnetic signal control assembly are both mounted on the mounting frame (6); the signal lamp mounting plate (4) comprises a red lamp mounting section (41), a yellow lamp mounting section (42) and a green lamp mounting section (43).
8. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 7, wherein: the electric signal control assembly comprises a motor (1), a gear (2) and a rack (3), wherein a command input end of the motor (1) is connected with a controller, the gear (2) is installed at a transmission end of the motor (1), teeth on the rack (3) are meshed with tooth grooves on the gear (2), a connecting bulge (31), a wire installation groove (32) and a clamping groove (33) are arranged on the rack (3), the bottom end of the connecting bulge (31) is communicated with the wire installation groove (32), and a copper guide sheet is arranged on the connecting bulge (31) and connected with the end part of a wire installed in the wire installation groove (32); the copper guide sheet is matched with a first red light touch reed (411), a first yellow light touch reed (421) and a first green light touch reed (431) which are arranged on the signal lamp mounting plate (4) for use, and when the copper guide sheet is contacted with any one of the first red light touch reed (411), the first yellow light touch reed (421) and the first green light touch reed (431), the indicating lamp is lightened; and be provided with rack mounting groove (63) on mounting bracket (6), the inslot of rack mounting groove (63) is provided with joint arch (631), and joint arch (631) uses with joint groove (33) cooperation.
9. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in claim 7, wherein: the electromagnetic signal control assembly comprises a valve plate mounting frame (5), a magnet (7) and a spring (8), an electromagnetic valve plate (51) is arranged on the valve plate mounting frame (5), and the magnetic pole of the electrified electromagnetic valve plate (51) is opposite to that of the magnet (7); a magnet telescopic groove (61) and a first contact connecting sheet (62) are arranged on the mounting rack (6), a spring (8) is sleeved on the magnet (7), and is arranged in the magnet telescopic groove (61), a second contact connecting sheet (72) matched with the first contact connecting sheet (62) is also arranged on the magnet (7), when the first contact connecting sheet (62) is contacted with the second contact connecting sheet (72), the copper guide sheet arranged at the end part of the magnet (7) generates current, and the copper guide sheet is respectively matched with a second red light touch reed (412), a second yellow light touch reed (422) and a second green light touch reed (432) which are arranged on the signal lamp mounting plate (4), when the copper guide sheet is contacted with any one of a second red light touch reed (412), a second yellow light touch reed (422) and a second green light touch reed (432), the indicator light is lightened; the magnet (7) is further provided with a limiting bulge (71), when the magnet (7) is installed in the magnet telescopic groove (61), the limiting bulge (71) limits the right part of the magnet (7), and the first touch connecting piece (62) is in contact with the second touch connecting piece (72).
10. The embedded special vehicle priority running system based on the dynamic traffic information network as claimed in any one of claims 7 to 9, wherein the controller is a multi-output control port STM32 single chip microcomputer and comprises a power command output port and an electric signal command output port, the power command output port is communicated with the electric signal control assembly, and the electric signal command output port is communicated with the electromagnetic signal control assembly.
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