CN113674531A - License plate recognition all-in-one machine and accurate recognition method - Google Patents
License plate recognition all-in-one machine and accurate recognition method Download PDFInfo
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- CN113674531A CN113674531A CN202110963996.6A CN202110963996A CN113674531A CN 113674531 A CN113674531 A CN 113674531A CN 202110963996 A CN202110963996 A CN 202110963996A CN 113674531 A CN113674531 A CN 113674531A
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
- F16M11/045—Allowing translations adapted to left-right translation movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
- F16M11/08—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a vertical axis, e.g. panoramic heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
- F16M11/28—Undercarriages for supports with one single telescoping pillar
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/10—Movable barriers with registering means
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/27—Individual registration on entry or exit involving the use of a pass with central registration
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
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- Physics & Mathematics (AREA)
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
Abstract
The invention discloses a license plate recognition all-in-one machine which comprises a license plate recognition device, a license plate information processing system and a gate mechanism, wherein the license plate recognition device comprises an adjusting groove seat mechanism arranged on the ground, a fixed upright post and a translation upright post which are respectively arranged at two ends of the adjusting groove seat mechanism, and a license plate image acquisition mechanism arranged at the upper ends of the fixed upright post and the translation upright post, and the license plate information processing system comprises a license plate information receiving and processing unit, a communication unit, a main controller and a storage unit. The license plate recognition device is arranged to collect images of license plates on the head and the tail of the vehicle respectively, and the license plates are compared with the license plate information receiving and processing unit simultaneously, so that the accuracy of license plate recognition is improved.
Description
Technical Field
The invention relates to the technical field of intelligent transportation, in particular to a license plate recognition all-in-one machine and an accurate recognition method.
Background
The license plate number of the vehicle is the only 'identity' mark of the vehicle, the license plate recognition technology can realize the automatic registration and verification of the 'identity' of the vehicle under the condition that the vehicle is not changed, the technology is applied to various occasions such as road charging, parking management, weighing systems, traffic guidance, traffic law enforcement, road inspection, vehicle scheduling, vehicle detection and the like, the traditional license plate recognition system mainly comprises a license plate positioning module, a character segmentation module and a character recognition module, wherein the license plate positioning module is mainly used for positioning the position of the license plate in a picture to be recognized; the character segmentation module is used for segmenting the license plate to obtain a plurality of character pictures; the character recognition module is used for recognizing characters in the character picture.
In the practical parking lot application, the license plate recognition device has the following problems,
(1) because the field installation position and the field factor influence, the license plate recognition accuracy is unstable, the recognition capability of the existing license plate recognition camera equipment is analyzed in better weather and field environment, the recognition effect is better, but the accuracy of the license plate recognition device can not be basically ensured in poorer environment (thunderstorm days or night), and the night is an accident high-incidence time period, so that the license plate needs to be strictly monitored, and the accident caused by the wrong license plate recognition is avoided;
(2) the existing license plate recognition device carries out integral shooting on a vehicle head and extracts license plate information in the vehicle head, in the extraction process, other characters except the license plate may appear on part of vehicles, the extraction process is complex and is easy to make mistakes, the recognition effect is poor, and the recognition efficiency is low.
Disclosure of Invention
Therefore, the invention provides the license plate recognition all-in-one machine and the accurate recognition method, and effectively solves the problems that the accuracy of a license plate recognition device cannot be ensured, the process of extracting the license plate by overall shooting of a vehicle head is complex and errors are easy to occur in the prior art.
In order to solve the technical problems, the invention specifically provides the following technical scheme: a license plate recognition all-in-one machine comprises a license plate recognition device, a license plate information processing system in communication connection with the license plate recognition device, and a gate mechanism in control connection with the license plate information processing system;
the license plate recognition device comprises an adjusting groove seat mechanism arranged on the ground, a fixed upright post and a translation upright post which are respectively arranged at two ends of the adjusting groove seat mechanism, and a license plate image acquisition mechanism arranged at the upper ends of the fixed upright post and the translation upright post;
the license plate information processing system comprises a license plate information receiving and processing unit, a communication unit, a main controller and a storage unit, wherein the output end of the storage unit is electrically connected with the input end of the main controller, the main controller is electrically connected with the communication unit in a bidirectional mode, the input end of the communication unit is electrically connected with the output end of the license plate information receiving and processing unit, and the output end of the communication unit is in communication connection with the license plate recognition device;
the license plate image acquisition mechanism comprises a fixed upright post, a translation upright post, an adjusting groove seat mechanism and a control mechanism, wherein the fixed upright post and the translation upright post adjust the rotation direction and the overall height of the license plate image acquisition mechanism, and the adjusting groove seat mechanism adjusts the translation position of the translation upright post;
license plate information receiving and processing unit are used for receiving the license plate information that license plate image acquisition mechanism gathered and discern license plate information, communication unit with the information transmission who handles in main control unit with storage data among the memory cell compares the processing, main control unit according to the comparison result to communication unit send instruction, communication unit with the instruction transmission who receives extremely floodgate machine structure, floodgate machine structure carries out alarm processing or clearance according to receiving the instruction and handles.
As a preferred scheme of the present invention, the fixed upright comprises a fixed column body, a first rotating column body arranged on the fixed column body, and a first adjusting chamber arranged in the fixed column body, wherein a first rotating driving member and a first lifting driving member are arranged in the first adjusting chamber;
the first rotary driving piece is used for controlling the first rotary cylinder to rotate so as to adjust the collecting direction of the license plate image collecting mechanism, and the first lifting driving piece is used for controlling the first rotary cylinder to lift so as to adjust the collecting height of the license plate image collecting mechanism.
As a preferable scheme of the present invention, the first rotary driving member includes a first driving threaded cylinder disposed in the first adjustment chamber, a first threaded connection column threadedly connected in the first driving threaded cylinder, and a first driving motor connected to a lower end of the first driving threaded cylinder, and an upper end of the first threaded connection column is connected to a lower end of the first rotary cylinder;
first lift driving piece is including setting up internal first spacing frame of fixed column and setting are in first drive gear in the first spacing frame, the confession has been seted up on the first screw thread spliced pole the first vertical caulking groove of gear part embedding on the first drive gear, the confession has been seted up in the first spacing frame the first joint groove of first drive gear joint, the confession has been seted up to first regulation cabin up end first spacing frame carries out the gliding first spout of translation, joint tooth continuous distribution on the first drive gear is in part surface on the first drive gear, first drive gear side is connected with second driving motor.
As a preferable scheme of the present invention, the translation column includes a translation cylinder, a second rotation cylinder disposed on the translation cylinder, and a second adjustment chamber disposed in the translation cylinder, and a second rotation driving member and a second lifting driving member are disposed in the second adjustment chamber;
the second rotary driving piece is used for controlling the second rotary cylinder to rotate so as to adjust the collecting direction of the license plate image collecting mechanism, and the second lifting driving piece is used for controlling the second rotary cylinder to lift so as to adjust the collecting height of the license plate image collecting mechanism.
As a preferable scheme of the present invention, the second rotary driving member includes a second driving threaded cylinder disposed in the second adjustment chamber, a second threaded connection column threadedly connected in the second driving threaded cylinder, and a third driving motor connected to a lower end of the second driving threaded cylinder, and an upper end of the second threaded connection column is connected to a lower end of the second rotary cylinder;
second lift driving piece is including setting up spacing frame of second in the translation post and setting are in second drive gear in the spacing frame of second, offer the confession on the second screw thread spliced pole the vertical caulking groove of second of gear part embedding on the second drive gear, the confession has been seted up in the spacing frame of second the second joint groove of second drive gear joint, the confession has been seted up to second regulation cabin up end the spacing frame of second carries out the gliding second spout of translation, joint tooth continuous distribution on the second drive gear is in the last part surface of second drive gear, second drive gear side is connected with fourth driving motor.
As a preferable scheme of the present invention, the adjusting groove seat mechanism includes a fixed groove embedded in the ground, a connecting partition plate disposed in the fixed groove, and a closed partition plate vertically disposed below the connecting partition plate, an adjusting screw is disposed along a length direction of the fixed groove, the adjusting screw penetrates the closed partition plate, one end of the adjusting screw is connected to a fifth driving motor, the adjusting screw is threadedly connected to a threaded connection bolt, an upper end of the threaded connection bolt is connected to the translation cylinder, and a translation groove for the threaded connection bolt to slide is disposed on the connecting partition plate.
As a preferred scheme of the present invention, the license plate image capturing mechanism includes a sub-controller, license plate recognition cameras disposed on the first rotating cylinder and the second rotating cylinder, a first limit seat structure disposed in the fixed cylinder, a second limit seat structure disposed in the translation cylinder, two sets of trigger elements disposed on the side edge of the fixed cylinder and connected to the threaded connection bolt, and a detection element disposed on one side edge of the translation column away from the fixed column;
the detection element measures the shortest distance between a vehicle head license plate and the license plate recognition camera, the trigger element is used for detecting vehicle head and vehicle tail position signals and transmitting shortest distance information and position information to the secondary controller, the secondary controller sends a shooting instruction to the license plate recognition camera, and the first limiting seat structure and the second limiting seat structure respectively carry out limiting control on the rotation angles of the first rotating cylinder and the second rotating cylinder.
As a preferable scheme of the invention, the first limiting seat structure comprises a first fixed ring seat rotatably arranged in the fixed column body, a first fixed groove seat fixedly connected in the first fixed ring seat, a first adjusting groove seat sleeved in the first fixed groove seat, and a first limiting adjusting cabin arranged on the side edge of the fixed column body, the inside of the first limiting adjusting cabin is communicated with the inside of the fixed column body, a first main triangular adjusting tooth is arranged around the outer ring of the first fixed ring seat, a first adjusting gear meshed with the first main triangular adjusting tooth is arranged in the first limiting adjusting cabin, a first secondary triangular adjusting tooth is arranged around the outer ring of the first adjusting groove seat, a second adjusting gear meshed with the first secondary triangular adjusting tooth is arranged in the first limiting adjusting cabin, and a first adjusting motor and a second adjusting motor are respectively connected on the first adjusting gear and the second adjusting gear, the first adjusting motor and the second adjusting motor are in communication connection with the secondary controller.
As a preferable scheme of the invention, the second limiting seat structure comprises a second fixed ring seat rotatably arranged in the translation cylinder, a second fixed groove seat fixedly connected in the second fixed ring seat, a second adjusting groove seat sleeved in the second fixed groove seat, and a second limiting adjusting cabin arranged on the side edge of the translation cylinder, the inside of the second limiting adjusting cabin is communicated with the inside of the translation cylinder, a second main triangular adjusting tooth is arranged around the outside of the second fixed ring seat, a third adjusting gear meshed with the second main triangular adjusting tooth is arranged in the second limiting adjusting cabin, a second secondary triangular adjusting tooth is arranged around the outside of the second adjusting groove seat, a fourth adjusting gear meshed with the second secondary triangular adjusting tooth is arranged in the second limiting adjusting cabin, and a third adjusting motor and a fourth adjusting motor are respectively connected on the third adjusting gear and the fourth adjusting gear, and the third adjusting motor and the fourth adjusting motor are in communication connection with the secondary controller.
As a preferred scheme of the invention, the accurate identification method of the license plate identification all-in-one machine comprises the following steps,
step one, limiting and adjusting the license plate recognition camera: the detection element detects the shortest distance between the vehicle head license plate and the license plate recognition camera, transmits data to the secondary controller, and adjusts the first limiting seat structure and the second limiting seat structure into a specific initial angle and a specific limiting space through the operation of the secondary controller;
step two, image data acquisition and transmission: the trigger element checks the positions of the head and the tail of the vehicle and transmits position information to the secondary controller, the secondary controller sends a shooting instruction to the license plate recognition camera, the license plate recognition camera carries out license plate shooting, and license plate images detected twice are transmitted to the license plate information receiving and processing unit;
step three, image primary comparison: the license plate information receiving and processing unit compares two groups of vehicle head and tail license plate image information, if the results are consistent, one item of image data is sent, if the results are inconsistent, different items of image data are sent, and the sent data are all sent to the communication unit;
step four: and (3) image secondary comparison: the communication unit transmits the received image information to the main controller, and the storage unit takes the stored license plate sample data as a comparison sample to compare with the processed license plate information;
step five, instruction control and instruction implementation: under the condition that the image information is compared and consistent, the main controller sends a release instruction to the gate mechanism through the communication unit; and sending a shooting instruction to the license plate recognition device through the communication unit under the condition that the image information comparison is inconsistent, and re-performing the second step, the third step and the fourth step, if the image comparison result is inconsistent, sending an alarm instruction to the gate mechanism through the communication unit, and manually checking the vehicle by a worker according to the alarm instruction.
Compared with the prior art, the invention has the following beneficial effects:
(1) the license plate recognition device is arranged, the two groups of trigger elements are arranged, so that the license plate recognition camera respectively collects images of license plates at the head and the tail of the vehicle, and the license plates are simultaneously compared through the license plate information receiving and processing unit, the accuracy of license plate recognition is improved, the condition that inconsistency occurs once is subjected to repeated verification, an alarm is given, then manual verification is carried out, the safety of parking is ensured, and accidents caused by wrong license plate recognition are avoided;
(2) according to the invention, the first limiting seat structure and the second limiting seat structure are arranged on the fixed column body and the translation column body, the initial angle of the rotation space of the license plate recognition camera is adjusted to enable the license plate recognition camera to be over against the license plate, and the radian of the rotation space of the license plate recognition camera is adjusted to enable the license plate recognition camera to be still over against the license plate after the vehicle moves, so that the license plate information filtering process is reduced, the recognition efficiency is improved, and the recognition effect is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a license plate recognition all-in-one machine provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a license plate recognition device and a license plate information processing system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a stationary cylinder or a translating cylinder in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first stopper seat structure and a second stopper seat structure in an embodiment of the invention.
The reference numerals in the drawings denote the following, respectively:
1-a license plate recognition device; 2-a license plate information processing system; 3-a gate mechanism;
11-adjusting the groove seat mechanism; 12-fixing the upright post; 13-a translation column; 14-license plate image acquisition mechanism;
21-license plate information receiving and processing unit; 22-a communication unit; 23-a master controller; 24-a storage unit;
111-fixing the trough body; 112-connecting the partition; 113-a closed separator; 114-adjusting screw; 115-a fifth drive motor; 116-threaded connection bolt; 117-translation slots;
121-a stationary cylinder; 122-a first rotating cylinder; 123-a first conditioning compartment; 124-a first rotary drive; 125-a first lifting drive;
131-a translation cylinder; 132-a second rotating cylinder; 133-a second conditioning pod; 134-a second rotary drive; 135-a second lifting drive;
141-order controller; 142-license plate recognition camera; 143-a first limit seat structure; 144-a second limit seat structure; 145-a trigger element; 146-a detection element;
1241-a first drive screw barrel; 1242-first threaded connection post; 1243-a first drive motor;
1251-a first stop frame; 1252 — a first drive gear; 1253-a first vertical caulking groove; 1254-first clip groove; 1255-a first runner;
1341-a second drive threaded barrel; 1342-a second threaded connection post; 1343-a third drive motor;
1351-a second limit frame; 1352-second drive gear; 1353-second vertical caulking groove; 1354-second clip groove; 1355-second chute;
1431 — a first retaining ring seat; 1432 — a first fixed socket; 1433 — a first adjustment socket; 1434-first limit adjustment compartment; 1435-first key triangle tooth; 1436 — first adjustment gear; 1437-first triangular teeth; 1438-a second adjustment gear;
1441-second stationary ring seat; 1442-second fixed nest; 1443 — second adjustment socket; 1444-second limit adjustment capsule; 1445 — second key triangle teeth; 1446 — third adjustment gear; 1447-second set of triangular teeth; 1448-fourth adjustment gear.
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.
As shown in fig. 1, the invention provides a license plate recognition all-in-one machine, which comprises a license plate recognition device 1, a license plate information processing system 2 in communication connection with the license plate recognition device 1, and a gate mechanism 3 in control connection with the license plate information processing system 2.
The invention adopts the adjustable license plate recognition device 1 to collect images and transmit the collected image information to the license plate information processing system 2, and the license plate information processing system 2 controls the gate mechanism 3 to send out an alarm or release the vehicle according to the information.
The gate mechanism is not specifically designed in the invention, and with reference to the gate in the prior art, an alarm is additionally added to the gate mechanism 3 of the invention, so that the alarm is given out when the image information is in a problem.
The main parts of the invention are an image acquisition part and an image processing and control part, the two parts are used for extracting, transmitting and comparing images in a combined mode, and the following is a specific implementation mode of the main parts.
A first part: in the image acquisition part, the license plate recognition device 1 is adopted to acquire the license plate, and the accuracy of license plate recognition cannot be completely guaranteed by acquiring the image of the vehicle head part, so that the license plate recognition device 1 mainly acquires the images of both the front license plate and the rear license plate in the embodiment.
The front and the back are respectively provided with a fixed upright post 12 and a translation upright post 13, in order to adapt to vehicles with different lengths, the translation upright post 13 in the embodiment can slide in the moving range of the adjusting slot seat mechanism 11, the fixed upright post 12 is fixedly arranged on the end part of the adjusting slot seat mechanism 11 close to the gate mechanism 3, and license plate image acquisition mechanisms 14 are arranged on the fixed upright post 12 and the translation upright post 13 to acquire license plate images.
In this embodiment, the fixed upright post 12 and the translation upright post 13 can both adjust the rotation direction and the overall height of the license plate image acquisition mechanism 14, the translation upright post 31 can adjust the position, and the translation position of the translation upright post 13 is adjusted by the adjusting slot seat mechanism 11.
First, the fixed column 12 is designed, as shown in fig. 2, the fixed column 12 includes a fixed cylinder 121, a first rotating cylinder 122 disposed on the fixed cylinder 121, and a first adjustment chamber 123 disposed in the fixed cylinder 121, and a first rotating driving member 124 and a first lifting driving member 125 are disposed in the first adjustment chamber 123.
In the fixed upright post 12, the first rotating cylinder 122 can rotate by an angle, so that the license plate image acquisition mechanism 14 rotates along with the first rotating cylinder, and the angle is converted during the running process of the vehicle, so that the acquired image is more accurate.
In addition, different vehicles perform license plate recognition, and the heights of the license plates are different, so that the first lifting driving part 125 is adopted to control the first rotating cylinder 122 to perform lifting movement so as to adjust the collecting height of the license plate image collecting mechanism 14.
In this embodiment, the first rotary driving member 124 is a preferred embodiment, and the first rotary driving member 124 includes a first driving threaded cylinder 1241 disposed in the first adjustment chamber 123, a first threaded connection post 1242 threaded in the first driving threaded cylinder 1241, and a first driving motor 1243 connected to a lower end of the first driving threaded cylinder 1241, and an upper end of the first threaded connection post 1242 is connected to a lower end of the first rotary cylinder 122.
The driving source of the first rotary driving member 124 is a first driving motor 1243, the first driving motor 1243 is controlled by the license plate image collecting mechanism 14, the first driving motor 1243 drives a first driving threaded cylinder 1241 to rotate so as to drive a first threaded connecting column 1242 to rotate, the first threaded connecting column 1242 drives a first rotary column 122 to rotate, so as to drive the license plate image collecting mechanism 14 above to rotate, and therefore, the angle of the license plate image collecting mechanism 14 is changed.
In addition, we provide and design the first lifting driving element 125 to control the first rotating cylinder 122 to lift, as shown in fig. 3, the first lifting driving element 125 includes a first limiting frame 1251 disposed in the fixed cylinder 121 and a first driving gear 1252 disposed in the first limiting frame 1251, a first vertical caulking groove 1253 for partially embedding a gear on the first driving gear 1252 is formed on the first threaded connecting column 1242, a first clamping groove 1254 for clamping the first driving gear 1252 is formed in the first limiting frame 1251, a first sliding groove 1255 for sliding the first limiting frame 1251 in a horizontal direction is formed on an upper end surface of the first adjusting chamber 123, clamping teeth on the first driving gear 1252 are continuously distributed on a partial outer surface of the first driving gear 1252, and a second driving motor (not shown in the figure) is connected to a side edge of the first driving gear 1252.
Second driving motor is unanimous with first driving motor 1243, receive license plate image acquisition mechanism 14 control, when needs carry out elevating movement, second driving motor operation drives first drive gear 1252 and rotates, drive first vertical caulking groove 1253 in the first threaded connection post 1242 of first spacing frame 1251 slip embedding, carry on spacingly to first threaded connection post 1242, thereby drive first driving motor 1243 this moment and drive first drive screw thread section of thick bamboo 1241 and rotate and drive inside threaded connection's first threaded connection post 1242 and move up and down.
As a more preferable embodiment of this embodiment, the first vertical caulking groove 1253 may be replaced by a gear groove, and a gear clamped by the gear groove is disposed outside the first limiting frame 1251, so as to prevent the first vertical caulking groove 1253 from not facing the first limiting frame 1251 and limiting the first threaded connection post 1242.
In this embodiment, the first driving motor 1243 is used as a motor for rotating and adjusting the angle, a stepping motor may be used, and the control is performed by inputting a pulse signal, that is, the total rotation angle of the motor is determined by the number of input pulses, and the rotation speed of the motor is determined by the frequency of the pulse signal, and in addition, the motor is also used as a height-adjusting motor, the first threaded connection post 1242 needs to be controlled to go up and down by forward and reverse rotation, the stepping motor is used, the given working mode is positive sequence phase-change energization, the stepping motor is positive rotation, and phase-change is performed by reverse sequence energization, the motor is just reverse rotation, the second driving motor 1243 may be a common rotating motor, or may be a stepping motor, when the first limiting frame 1251 is embedded in the slot, the rotation speed of the first driving gear 1252 is slowed down or the motor is directly stopped, and the motor is not started after height adjustment is performed, so that the first limiting frame 1251 is reset to the initial position.
In the present invention, the design principle of the translation column 13 is the same as that of the fixed column 12, and is not described herein again, and the specific design of the translation column 13 is as follows: the translation upright column 13 comprises a translation cylinder 131, a second rotation cylinder 132 arranged on the translation cylinder 131, and a second adjustment cabin 133 arranged in the translation cylinder 131, a second rotation driving member 134 and a second lifting driving member 135 are arranged in the second adjustment cabin 133, the second rotation driving member 134 is used for controlling the second rotation cylinder 132 to rotate so as to adjust the collection direction of the license plate image collection mechanism 14, and the second lifting driving member 135 is used for controlling the second rotation cylinder 132 to lift so as to adjust the collection height of the license plate image collection mechanism 14.
The second rotary driving member 134 includes a second driving threaded barrel 1341 disposed in the second adjustment chamber 133, a second threaded connection post 1342 threadedly connected to the second driving threaded barrel 1341, and a third driving motor 1343 connected to the lower end of the second driving threaded barrel 1341, wherein the upper end of the second threaded connection post 1342 is connected to the lower end of the second rotary cylinder 132.
The second lifting driving element 135 comprises a second limiting frame 1351 arranged in the translation cylinder 131 and a second driving gear 1352 arranged in the second limiting frame 1351, a second vertical caulking groove 1353 for partial embedding of a gear on the second driving gear 1352 is formed in the second threaded connecting column 1342, a second clamping groove 1354 for clamping the second driving gear 1352 is formed in the second limiting frame 1351, a second sliding groove 1355 for translational sliding of the second limiting frame 1351 is formed in the upper end face of the second adjusting cabin 133, clamping teeth on the second driving gear 1352 are continuously distributed on partial outer surface of the second driving gear 1352, and a fourth driving motor is connected to the side edge of the second driving gear 1352.
In the embodiment, the difference between the translation upright column 13 and the fixed upright column 12 is that the translation upright column 13 can translate, the invention mainly adopts an adjusting groove seat mechanism 11 to adjust the position of the translation upright column 13, a main sliding medium is set as a fixed groove body 111, the fixed groove body 111 is arranged on the ground and protrudes out of a part of the ground, a connecting partition plate 112 is arranged in the fixed groove body 111 to mainly protect an internal driving piece, a sealing partition plate 113 is vertically arranged below the connecting partition plate 112 to further protect the internal driving piece, and thus rainwater is prevented from entering and causing short circuit; the main driving piece is exactly set up fifth driving motor 115 in the closed partition 113, be provided with adjusting screw 114 on the length direction of fixed cell body 111, adjusting screw 114 runs through the setting on closed partition 113, fifth driving motor 115 drives adjusting screw 114 and rotates, threaded connection has threaded connection bolt 116 on the adjusting screw 114 (in order to prevent that the rainwater from getting into rusty, threaded connection bolt 116 and adjusting screw 114 all adopt stainless steel material), it controls about (only controlling about in the figure) to drive threaded connection bolt 116 when adjusting screw 114 rotates, threaded connection bolt 116 upper end is connected with translation cylinder 131 and is driven translation cylinder 131 translation, set up on the connection partition 112 and supply the gliding translation groove 117 of threaded connection bolt 116.
Rainwater enters the connecting partition plate 112 through the translation groove 117 to prevent rainwater accumulation, and the bottom of the fixed groove body 111 can be communicated with a sewer so as to be convenient for discharging rainwater in the fixed groove body 111.
In addition, in the present invention, the license plate image capturing mechanism 14 is mainly used to capture the image of the license plate, and the main structure includes a secondary controller 141 (the aforementioned first driving motor 1243, second driving motor, third driving motor 1243 and fourth driving motor are all controlled by the secondary controller), a license plate recognition camera 142, a first limit seat structure 143, a second limit seat structure 144, a trigger element 145 and a detection element 146, in the above structure, the license plate recognition camera 142 is disposed on the first rotating column 122 and the second rotating column 122, the first limit seat structure 143 and the second limit seat structure 144 are disposed in the fixed column 121 and the translational column 131, and the trigger element 145 has two sets, which are disposed on the side of the fixed 111 and connected to the threaded connection bolt 116 (moving along with the movement of the threaded connection bolt 116).
In this embodiment, the detecting element 146 measures the shortest distance between the vehicle head license plate and the license plate recognition camera 142, the triggering element 145 is configured to detect vehicle head and vehicle tail position signals, and transmit the shortest distance information and the position information to the secondary controller 141, the secondary controller 141 sends a shooting instruction to the license plate recognition camera 142, and the first limiting seat structure 143 and the second limiting seat structure 144 respectively perform limiting control on the rotation angles of the first rotating cylinder 122 and the second rotating cylinder 132.
Wherein, trigger component 145 and detecting element 146 all can adopt supplementary detection facilities such as installation pre-buried ground induction coil, infrared sensor.
The present embodiment is mainly designed as a first position-limiting base structure 143, and the first position-limiting base structure 143 limits the initial rotation position and the rotation angle of the first rotating cylinder 122, as shown in fig. 3, the preferred embodiment of the present invention mainly adopts, the first position-limiting base structure 143 includes a first fixed ring base 1431 rotatably disposed in the fixed cylinder 121, a first fixed groove base 1432 fixedly connected in the first fixed ring base 1431, a first adjusting groove base 1433 sleeved in the first fixed groove base 1432, and a first position-limiting adjusting compartment 1434 disposed at a side of the fixed cylinder 121, an interior of the first position-limiting adjusting compartment 1434 is communicated with an interior of the fixed cylinder 121, an outer ring of the first fixed ring base 1431 is provided with a first main triangular adjusting tooth 1435, an inner ring of the first position-limiting adjusting compartment 1434 is provided with a first adjusting gear 1436 engaged with the first main triangular adjusting tooth 1435, an outer ring of the first adjusting groove base 1433 is provided with a first triangular adjusting tooth 1437, a second adjusting gear 1438 engaged with the first triangular adjusting tooth 1437 is arranged in the first limiting adjusting cabin 1434, a first adjusting motor and a second adjusting motor (not shown in the figure) are respectively connected to the first adjusting gear 1436 and the second adjusting gear 1438, and both the first adjusting motor and the second adjusting motor are in communication connection with the secondary controller 141.
As a preferable scheme of this embodiment, a limiting plate may be disposed at a side of the first rotating cylinder 122, the limiting plate is located between the first fixing groove 1432 and the first adjusting groove 1433, an initial rotation angle of the first rotating cylinder 122 is first adjusted, and the first adjusting motor (which is a stepping motor as the above motor) drives the first adjusting gear 1436 to rotate so as to drive the first fixing ring 1431 to rotate a certain angle, so that a position of the side of the first fixing groove 1432 is changed; secondly, thereby the second adjustment motor drives second adjusting gear 1438 and rotates and drive first adjustment slot 1433 and rotate certain angle for the side of first adjustment slot 1433 changes, and then initial rotational position and the interval angle of rotation between first fixed slot 1432 and the first adjustment slot 1433 change, makes license plate discernment camera 142 make a video recording (make the data of gathering draw better) perpendicularly the license plate all the time, and is applicable to the vehicle of different length and uses.
In the license plate image capturing mechanism 14, the first limiting seat structure 143 and the second limiting seat structure 144 have the same structural principle, and the specific working principle is not described again, and the second limiting seat structure 144 is designed as follows: the second limit seat structure 144 includes a second fixed ring seat 1441 rotatably disposed in the translation cylinder 131, a second fixed groove seat 1442 fixedly connected in the second fixed ring seat 1441, a second adjusting groove seat 1443 sleeved in the second fixed groove seat 1442, and a second limit adjusting cabin 1444 disposed at a side of the translation cylinder 131, an inside of the second limit adjusting cabin 1444 is communicated with an inside of the translation cylinder 131, a second main triangular tooth 1445 is disposed around an outer ring of the second fixed ring seat 1441, a third adjusting gear 1446 engaged with the second main triangular tooth 1445 is disposed in the second limit adjusting cabin 1444, a second secondary triangular tooth 1447 is disposed around an outer ring of the second limit adjusting cabin 1443, a fourth adjusting gear 1448 engaged with the second secondary triangular tooth 1447 is disposed in the second limit adjusting cabin 1444, and a third adjusting motor and a fourth adjusting motor are respectively connected to the third adjusting gear 1446 and the fourth adjusting gear 1448, the third adjusting motor and the fourth adjusting motor are both in communication connection with the secondary controller 141.
A second part: an image processing control section: in the embodiment, the license plate information processing system 2 is adopted to extract, transmit and compare license plate image information, and alarm processing is performed on unqualified license plates, so that certain safety is ensured.
The main part is a license plate information receiving and processing unit 21, a communication unit 22, a main controller 23 and a storage unit 24, and the specific connection mode sequence is as follows:
the output end of the storage unit 24 is electrically connected with the input end of the main controller 23, the main controller 23 is electrically connected with the communication unit 22 in a bidirectional mode, the input end of the communication unit 22 is electrically connected with the output end of the license plate information receiving and processing unit 21, and the output end of the communication unit 22 is in communication connection with the license plate recognition device 1.
In this embodiment, the license plate information receiving and processing unit 21 is configured to receive license plate information collected by the license plate image collection mechanism 14 and identify the license plate information, the communication unit 22 transmits the processed information to the main controller 23 to compare the processed information with stored data in the storage unit 24, the main controller 23 sends an instruction to the communication unit 22 according to a comparison result, the communication unit 22 transmits the received instruction to the gate mechanism 3, and the gate mechanism 3 performs alarm processing or release processing according to the received instruction.
In addition, the main controller 23 may be further provided with an input unit and an output unit, the input unit may be configured as a data input system (specifically, may be configured as a computer keyboard, and the vehicle information is input into the storage unit 24 through the computer keyboard), and the output unit may be configured as a display, and the image acquisition is performed while the result of the image acquisition is displayed on the display, and the comparison result is displayed on the display, so that manual sampling and checking are facilitated.
In summary, the precise identification method for the license plate identification all-in-one machine provided by the invention mainly comprises the following steps,
step one, limiting and adjusting a license plate recognition camera: the detecting element 146 detects the shortest distance between the vehicle head license plate and the license plate recognition camera 142, transmits data to the secondary controller 141, and adjusts the first limiting seat structure 143 and the second limiting seat structure 144 into a specific initial angle and a specific limiting space through the operation of the secondary controller 141;
step two, image data acquisition and transmission: the trigger element 145 checks the position of the vehicle head and the vehicle tail and transmits the position information to the secondary controller 141, the secondary controller 141 sends a shooting instruction to the license plate recognition camera 142, the license plate recognition camera 142 performs license plate shooting, and transmits the two detected license plate images to the license plate information receiving and processing unit 21;
step three, image primary comparison: the license plate information receiving and processing unit 21 compares the two sets of vehicle head and tail license plate image information, if the results are consistent, one item of image data is sent, if the results are inconsistent, different items of image data are sent, and the sent data are all sent to the communication unit 22;
step four: and (3) image secondary comparison: the communication unit 22 transmits the received image information to the main controller 23, and the storage unit 24 compares the stored license plate sample data serving as a comparison sample with the processed license plate information;
step five, instruction control and instruction implementation: when the image information is compared and consistent, the main controller 23 sends a release instruction to the gate mechanism 3 through the communication unit 22; and if the image information comparison result is not consistent, an alarm instruction is sent to the gate mechanism 3 through the communication unit 22, and a worker manually checks the vehicle according to the alarm instruction.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. The license plate recognition all-in-one machine is characterized by comprising a license plate recognition device (1), a license plate information processing system (2) in communication connection with the license plate recognition device (1), and a gate mechanism (3) in control connection with the license plate information processing system (2);
the license plate recognition device (1) comprises an adjusting groove seat mechanism (11) arranged on the ground, a fixed upright post (12) and a translation upright post (13) which are respectively arranged at two ends of the adjusting groove seat mechanism (11), and a license plate image acquisition mechanism (14) arranged at the upper ends of the fixed upright post (12) and the translation upright post (13);
the license plate information processing system (2) comprises a license plate information receiving and processing unit (21), a communication unit (22), a main controller (23) and a storage unit (24), wherein the output end of the storage unit (24) is electrically connected with the input end of the main controller (23), the main controller (23) is electrically connected with the communication unit (22) in a two-way manner, the input end of the communication unit (22) is electrically connected with the output end of the license plate information receiving and processing unit (21), and the output end of the communication unit (22) is in communication connection with the license plate recognition device (1);
the fixed upright post (12) and the translation upright post (13) adjust the rotation direction and the overall height of the license plate image acquisition mechanism (14), and the adjusting groove seat mechanism (11) adjusts the translation position of the translation upright post (13);
license plate information receiving and processing unit (21) are used for receiving the license plate information that license plate image acquisition mechanism (14) gathered just discerns license plate information, communication unit (22) with the information transmission who has handled in main control unit (23) with storage data in storage unit (24) compare the processing, main control unit (23) according to the comparison result to communication unit (22) send instruction, communication unit (22) with the instruction transmission who receives extremely floodgate machine mechanism (3), floodgate machine mechanism (3) are according to receiving the instruction and are reported to the police and handle or release the processing.
2. The integrated license plate recognition machine of claim 1, wherein the fixed upright (12) comprises a fixed cylinder (121), a first rotating cylinder (122) arranged on the fixed cylinder (121), and a first adjusting cabin (123) arranged in the fixed cylinder (121), and a first rotating driving member (124) and a first lifting driving member (125) are arranged in the first adjusting cabin (123);
the first rotary driving part (124) is used for controlling the first rotary cylinder (122) to rotate so as to adjust the collecting direction of the license plate image collecting mechanism (14), and the first lifting driving part (125) is used for controlling the first rotary cylinder (122) to lift so as to adjust the collecting height of the license plate image collecting mechanism (14).
3. The integrated license plate recognition machine of claim 2, wherein the first rotary driving member (124) comprises a first driving threaded cylinder (1241) arranged in the first adjusting cabin (123), a first threaded connection post (1242) threaded in the first driving threaded cylinder (1241), and a first driving motor (1243) connected to a lower end of the first driving threaded cylinder (1241), and an upper end of the first threaded connection post (1242) is connected to a lower end of the first rotary cylinder (122);
first lift driving piece (125) is including setting up first spacing frame (1251) in fixed cylinder (121) and setting are in first drive gear (1252) in first spacing frame (1251), the confession has been seted up on first threaded connection post (1242) first vertical caulking groove (1253) of gear part embedding on first drive gear (1252), set up the confession in first spacing frame (1251) first joint groove (1254) of first drive gear (1252) joint, confession has been seted up to first regulation cabin (123) up end first spacing frame (1251) carries out the gliding first spout (1255) of translation, the joint tooth on first drive gear (1252) distributes in succession on the part surface on first drive gear (1252), first drive gear (1252) side is connected with second driving motor.
4. The integrated license plate recognition machine of claim 3, wherein the translation column (13) comprises a translation cylinder (131), a second rotation cylinder (132) arranged on the translation cylinder (131), and a second regulation cabin (133) arranged in the translation cylinder (131), and a second rotation driving member (134) and a second lifting driving member (135) are arranged in the second regulation cabin (133);
the second rotary driving part (134) is used for controlling the second rotary cylinder (132) to rotate so as to adjust the collecting direction of the license plate image collecting mechanism (14), and the second lifting driving part (135) is used for controlling the second rotary cylinder (132) to lift so as to adjust the collecting height of the license plate image collecting mechanism (14).
5. The license plate recognition all-in-one machine of claim 4, characterized in that the second rotary driving member (134) comprises a second driving threaded barrel (1341) arranged in the second adjusting cabin (133), a second threaded connection post (1342) threaded in the second driving threaded barrel (1341), and a third driving motor (1343) connected to the lower end of the second driving threaded barrel (1341), the upper end of the second threaded connection post (1342) is connected to the lower end of the second rotary column (132);
the second lifting driving piece (135) comprises a second limiting frame (1351) arranged in the translation cylinder (131) and a second driving gear (1352) arranged in the second limiting frame (1351), a second vertical caulking groove (1353) for partial embedding of the gear on the second driving gear (1352) is formed in the second threaded connecting column (1342), a second clamping groove (1354) for clamping the second driving gear (1352) is formed in the second limiting frame (1351), a second sliding groove (1355) for translational sliding of the second limiting frame (1351) is formed in the upper end face of the second adjusting cabin (133), clamping teeth on the second driving gear (1352) are continuously distributed on the partial outer surface of the second driving gear (1352), and a fourth driving motor is connected to the side of the second driving gear (1352).
6. The license plate recognition all-in-one machine of claim 5, wherein the adjusting groove seat mechanism (11) comprises a fixed groove body (111) embedded on the ground, a connecting partition plate (112) arranged in the fixed groove body (111), and a closed partition plate (113) vertically arranged below the connecting partition plate (112), an adjusting screw rod (114) is arranged along the length direction of the fixed groove body (111), the adjusting screw rod (114) is arranged on the closed partition plate (113) in a penetrating way, one end of the adjusting screw rod (114) is connected with a fifth driving motor (115), a threaded connection bolt (116) is connected to the adjusting screw rod (114) in a threaded manner, the upper end of the threaded connection bolt (116) is connected with the translation column (131), and a translation groove (117) for the threaded connection bolt (116) to slide is formed in the connection partition plate (112).
7. The integrated license plate recognition machine of claim 6, wherein the license plate image capturing mechanism (14) comprises a secondary controller (141), license plate recognition cameras (142) arranged on the first rotating cylinder (122) and the second rotating cylinder (122), a first limit seat structure (143) arranged in the fixed cylinder (121), a second limit seat structure (144) arranged in the translation cylinder (131), two sets of trigger elements (145) arranged on the side of the fixed groove body (111) and connected with the threaded connection bolt (116), and a detection element (146) arranged on the side of the translation column (13) far away from the fixed column (12);
the detection element (146) measures the shortest distance between a vehicle head license plate and the license plate recognition camera (142), the trigger element (145) is used for detecting vehicle head and vehicle tail position signals and transmitting shortest distance information and position information to the secondary controller (141), the secondary controller (141) sends a shooting instruction to the license plate recognition camera (142), and the first limiting seat structure (143) and the second limiting seat structure (144) respectively carry out limiting control on the rotation angles of the first rotating cylinder (122) and the second rotating cylinder (132).
8. The integrated license plate recognition machine of claim 7, wherein the first limit seat structure (143) comprises a first fixed ring seat (1431) rotatably disposed in the fixed cylinder (121), a first fixed groove seat (1432) fixedly connected in the first fixed ring seat (1431), a first adjusting groove seat (1433) sleeved in the first fixed groove seat (1432), and a first limit adjusting cabin (1434) disposed at a side of the fixed cylinder (121), an interior of the first limit adjusting cabin (1434) is communicated with an interior of the fixed cylinder (121), an outer ring of the first fixed ring seat (1431) is disposed with a first triangular adjusting tooth (1435), a first adjusting gear (1436) engaged with the first triangular adjusting tooth (1435) is disposed in the first limit adjusting cabin (1434), an outer ring of the first adjusting groove seat (1433) is disposed with a first secondary triangular adjusting tooth (1437), a second adjusting gear (1438) meshed with the first secondary triangular adjusting gear (1437) is arranged in the first limiting adjusting cabin (1434), a first adjusting motor and a second adjusting motor are connected to the first adjusting gear (1436) and the second adjusting gear (1438) respectively, and the first adjusting motor and the second adjusting motor are in communication connection with the secondary controller (141).
9. The integrated license plate recognition machine of claim 8, wherein the second limit seat structure (144) comprises a second fixed ring seat (1441) rotatably disposed in the translation cylinder (131), a second fixed groove seat (1442) fixedly connected in the second fixed ring seat (1441), a second adjusting groove seat (1443) sleeved in the second fixed groove seat (1442), and a second limit adjusting cabin (1444) disposed at a side of the translation cylinder (131), the interior of the second limit adjusting cabin (1444) is communicated with the interior of the translation cylinder (131), a second main triangle tooth (1445) is disposed around the outer ring of the second fixed ring seat (1441), a third adjusting gear (1446) engaged with the second main triangle tooth (1445) is disposed in the second limit adjusting cabin (1444), and a second secondary triangle tooth (1447) is disposed around the outer ring of the second adjusting groove seat (1443), a fourth adjusting gear (1448) meshed with the second secondary triangular adjusting gear (1447) is arranged in the second limiting adjusting cabin (1444), a third adjusting motor and a fourth adjusting motor are connected to the third adjusting gear (1446) and the fourth adjusting gear (1448) respectively, and the third adjusting motor and the fourth adjusting motor are in communication connection with the secondary controller (141).
10. The accurate identification method of the license plate identification all-in-one machine according to any one of claims 1 to 9, characterized by comprising the following steps,
step one, limiting and adjusting the license plate recognition camera: the detection element detects the shortest distance between the vehicle head license plate and the license plate recognition camera, transmits data to the secondary controller, and adjusts the first limiting seat structure and the second limiting seat structure into a specific initial angle and a specific limiting space through the operation of the secondary controller;
step two, image data acquisition and transmission: the trigger element checks the positions of the head and the tail of the vehicle and transmits position information to the secondary controller, the secondary controller sends a shooting instruction to the license plate recognition camera, the license plate recognition camera carries out license plate shooting, and license plate images detected twice are transmitted to the license plate information receiving and processing unit;
step three, image primary comparison: the license plate information receiving and processing unit compares two groups of vehicle head and tail license plate image information, if the results are consistent, one item of image data is sent, if the results are inconsistent, different items of image data are sent, and the sent data are all sent to the communication unit;
step four: and (3) image secondary comparison: the communication unit transmits the received image information to the main controller, and the storage unit takes the stored license plate sample data as a comparison sample to compare with the processed license plate information;
step five, instruction control and instruction implementation: under the condition that the image information is compared and consistent, the main controller sends a release instruction to the gate mechanism through the communication unit; and sending a shooting instruction to the license plate recognition device through the communication unit under the condition that the image information comparison is inconsistent, and re-performing the second step, the third step and the fourth step, if the image comparison result is inconsistent, sending an alarm instruction to the gate mechanism through the communication unit, and manually checking the vehicle by a worker according to the alarm instruction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110963996.6A CN113674531A (en) | 2021-08-21 | 2021-08-21 | License plate recognition all-in-one machine and accurate recognition method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110963996.6A CN113674531A (en) | 2021-08-21 | 2021-08-21 | License plate recognition all-in-one machine and accurate recognition method |
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| CN113674531A true CN113674531A (en) | 2021-11-19 |
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Application publication date: 20211119 |