CN108320522A - Vehicle speed measuring device and method - Google Patents
Vehicle speed measuring device and method Download PDFInfo
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- CN108320522A CN108320522A CN201810295351.8A CN201810295351A CN108320522A CN 108320522 A CN108320522 A CN 108320522A CN 201810295351 A CN201810295351 A CN 201810295351A CN 108320522 A CN108320522 A CN 108320522A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 57
- 230000015654 memory Effects 0.000 claims description 40
- 238000012544 monitoring process Methods 0.000 claims description 19
- 230000008034 disappearance Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
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Classifications
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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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/56—Context or environment of the image exterior to a vehicle by using sensors mounted on the vehicle
- G06V20/58—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
- G06V20/584—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads of vehicle lights or traffic lights
-
- 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
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
- G06V20/625—License plates
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Traffic Control Systems (AREA)
Abstract
The present embodiments relate to vehicle speed measuring technical fields, a kind of vehicle speed measuring device and method are provided, the vehicle speed measuring device includes image capture module, main control chip and communication module, image capture module, main control chip, communication module is sequentially connected electrically, and communication module with management terminal communications for connecting, image capture module, main control chip and communication module are integrated on same pcb board, compared with prior art, vehicle speed measuring device integrated level provided in an embodiment of the present invention is high, it is small, installation and maintenance is easy, eliminate narrow wave radar simultaneously, product overall cost is relatively low.
Description
Technical field
The present embodiments relate to vehicle speed measuring technical fields, in particular to a kind of vehicle speed measuring device and method.
Background technology
With the development of science and technology, automobile becomes more and more indispensable in people's lives, become important work of riding instead of walk
Tool.In this context, it tests the speed automobile to monitor the part that the automobile driven over the speed limit becomes indispensable in traffic control.
Doppler pulse is ceaselessly usually emitted to the vehicle in traveling using narrow wave radar in the prior art, speed difference is reflected back
Pulse frequency is also different, and narrow wave radar can judge the actual speed of vehicle according to the variation degree for the pulse frequency being reflected back,
If speed is too fast, narrow wave radar notifies video camera to carry out over-speed vehicles candid photograph at once.Due to needing narrow wave radar velocity measurement, and it is narrow
The cost of wave radar is higher, therefore overall product cost is also higher.
Invention content
The embodiment of the present invention is designed to provide a kind of vehicle speed measuring device and method, to improve the above problem.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows：
An embodiment of the present invention provides a kind of vehicle speed measuring device, the vehicle speed measuring device include image capture module,
Main control chip and communication module, described image acquisition module, main control chip, communication module are sequentially connected electrically, and the communication mould
For block for being connect with management terminal communications, described image acquisition module, main control chip and communication module are integrated in same pcb board
On；Described image acquisition module is used for the multiframe vehicle image of real-time collection vehicle, and the multiframe vehicle image is sent
To the main control chip；The main control chip obtains every frame vehicle for carrying out Car license recognition successively to the multiframe vehicle image
License board information in image, then the current vehicle that each vehicle is determined in analysis is carried out to the license board information in multiframe vehicle image
Speed, and the current vehicle speed according to each vehicle judges whether over-speed vehicles, when there are described in control when over-speed vehicles for judgement
The license board information of the over-speed vehicles is sent to the management terminal by communication module；The communication module is additionally operable to described more
Frame vehicle image is compressed to obtain monitoring video, and the monitoring video is sent to the management terminal.
Further, the main control chip includes at least one of FPGA, ASIC..
Further, the vehicle speed measuring device further includes the first memory module and the second memory module, and described first deposits
Storage module and second memory module are electrically connected with the main control chip, and first memory module is used for described image
The multiframe vehicle image that acquisition module acquires in real time is cached；Second memory module is for storing user to the vehicle
The product identification information of arrange parameter and the vehicle speed measuring device that speed measuring device is configured.
Further, first memory module includes at least one of DRAM, SRAM；The second memory module packet
Include at least one of EEPROM and FLASH flash memories.
Further, the vehicle speed measuring device further includes power module, and the power module acquires mould with described image
Block, main control chip and network communication interface are electrically connected, and the power module is used for as described image acquisition module, main control chip
And network communication interface provides supply of electric power.
The embodiment of the present invention additionally provides a kind of vehicle speed measuring method, is applied to above-mentioned vehicle speed measuring device, the vehicle
Speed-measuring method includes：The multiframe vehicle image of the real-time collection vehicle of described image acquisition module, and by the multiframe vehicle figure
As being sent to the main control chip；The main control chip carries out Car license recognition to the multiframe vehicle image and obtains every frame successively
License board information in vehicle image, then analysis is carried out to the license board information in multiframe vehicle image and determines the current of each vehicle
Speed, and the current vehicle speed according to each vehicle judges whether over-speed vehicles, when there are control institute when over-speed vehicles for judgement
It states communication module and the license board information of the over-speed vehicles is sent to the management terminal；The communication module is to the multiframe vehicle
Image is compressed to obtain monitoring video, and the monitoring video is sent to the management terminal.
Further, the license board information in the vehicle image to multiframe carries out the current vehicle that each vehicle is determined in analysis
The step of speed, including：Obtain the first license board information in first frame vehicle image, wherein first license board information is described
Any one license board information in first frame vehicle image；With the other vehicle figures of the continuous multiframe of first frame vehicle image
As in, detect that first license board information disappears or reach the target frame vehicle of another predeterminable area of vehicle image for the first time
Image；According to the frame number between the first frame vehicle image and the target frame vehicle image, the first car plate letter is calculated
Cease the current vehicle speed of corresponding vehicle.
Further, the frame number according between the first frame vehicle image and the target frame vehicle image, meter
The step of calculating the current vehicle speed of the corresponding vehicle of the first license board information, including：According to the first frame vehicle image with it is described
Frame number between target frame vehicle image, calculate between the first frame vehicle image and the target frame vehicle image when
Between be spaced；Default picture width when according to the time interval and the vehicle speed measuring device collection vehicle image, is determined
The current vehicle speed of the corresponding vehicle of first license board information.
Further, the step of current vehicle speed of each vehicle of the foundation judges whether over-speed vehicles, including：By
Whether a current vehicle speed for judging each vehicle is more than preset vehicle speed；When the current vehicle speed of any one vehicle is more than preset vehicle speed
When, judge the vehicle for over-speed vehicles.
Compared with the prior art, a kind of vehicle speed measuring device provided in an embodiment of the present invention and method, the vehicle speed measuring dress
It sets including image capture module, main control chip and communication module, image capture module, main control chip and communication module are integrated in together
On one pcb board, by the multiframe vehicle image of the real-time collection vehicle of image capture module and it is sent to main control chip, main control chip
It carries out Car license recognition successively to multiframe vehicle image and obtains the license board information in every frame vehicle image, then in multiframe vehicle image
License board information carry out analysis and determine the current vehicle speed of each vehicle, communication module will be controlled when there are over-speed vehicles to exceed the speed limit
The license board information of vehicle is sent to management terminal.Compared with prior art, vehicle speed measuring device collection provided in an embodiment of the present invention
High, small at degree, installation and maintenance is easy, while eliminating narrow wave radar, and product overall cost is relatively low.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the structure diagram for the vehicle speed measuring system that the embodiment of the present invention is provided.
Fig. 2 shows the structure diagrams for the vehicle speed measuring device that the embodiment of the present invention is provided.
Fig. 3 shows the internal structure block diagram for the main control chip that the embodiment of the present invention is provided.
Fig. 4 shows the work flow diagram for the vehicle speed measuring device that the embodiment of the present invention is provided.
Icon：100- vehicle speed measuring systems；110- vehicle speed measuring devices；120- networks；130- management terminals；111- images
Acquisition module；112- main control chips；1121-I2C controllers；1122- pre-processes submodule；1123- Car license recognition submodules；
1124- transmits submodule；113- communication modules；The first memory modules of 114-；The second memory modules of 115-；116- power modules.
Specific implementation mode
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Fig. 1 is please referred to, Fig. 1 shows the structure diagram for the vehicle speed measuring system 100 that the embodiment of the present invention is provided.Vehicle
Velocity-measuring system 100 includes vehicle speed measuring device 110 and management terminal 130, and vehicle speed measuring device 110 passes through network 120 and management
Terminal 130 communicates to connect.
Fig. 2 is please referred to, Fig. 2 shows the structure diagrams for the vehicle speed measuring device 110 that the embodiment of the present invention is provided.Vehicle
Speed measuring device 110 is deposited including image capture module 111, main control chip 112, communication module 113, the first memory module 114, second
Module 115 and power module 116 are stored up, image capture module 111, communication module 113, the first memory module 114, second store mould
Block 115 and power module 116 are electrically connected with main control chip 112, and communication module 113 is logical by network 120 and management terminal 130
Letter connection, image capture module 111, main control chip 112, communication module 113, the first memory module 114, the second memory module
115 and power module 116 be integrated on same PCB (Printed Circuit Board, printed circuit board) plate.
In the present embodiment, image capture module 111 is electrically connected with main control chip 112, and is electrically connected with power module 116
It connects, image capture module 111 is used for the multiframe vehicle image of real-time collection vehicle, and multiframe vehicle image is sent to master control
Chip 112.Image capture module 111 includes optical lens and CMOS optical sensors, optical lens and CMOS optical sensors
Connection, CMOS optical sensors are electrically connected with main control chip 112.Specifically, optical lens and CMOS optical sensors can be with
Electrical connection, such as optical lens are tight shot；Optical lens can also be mechanical with CMOS optical sensors and be electrically connected, example
Such as, optical lens is zoom lens.Optical lens is for obtaining extraneous light and projecting CMOS optical sensors, CMOS light
Sensor is learned to be used to export the vision signal of digital form, and the vision signal is encoded, modulate after obtain vehicle image
And it is sent to main control chip 112.
As an implementation, image capture module 111 can be CMOS camera.
In the present embodiment, main control chip 112 obtains every frame vehicle for carrying out Car license recognition successively to multiframe vehicle image
License board information in image, then the current vehicle that each vehicle is determined in analysis is carried out to the license board information in multiframe vehicle image
Speed, and the current vehicle speed according to each vehicle judges whether over-speed vehicles, when there are control communication when over-speed vehicles for judgement
The license board information of over-speed vehicles is sent to management terminal 130 by module 113.
As an implementation, main control chip 112 may be, but not limited to, FPGA (Field-Programmable
Gate Array, field programmable gate array), ASIC (Application Specific Integrated Circuits, specially
With integrated circuit) etc..
Fig. 3 is please referred to, Fig. 3 shows the internal structure block diagram for the main control chip 112 that the embodiment of the present invention is provided.Master control
Chip 112 includes I2C controllers 1121, pretreatment submodule 1122, Car license recognition submodule 1123 and transmission submodule 1124.
I2C controllers 1121 are electrically connected with image capture module 111, pretreatment submodule 1122 and Car license recognition submodule 1123 and figure
As acquisition module 111 is electrically connected, pretreatment submodule 1122, Car license recognition submodule 1123 and transmission submodule 1124 with
First memory module 114 is electrically connected, and is transmitted submodule 1124 and be electrically connected with Car license recognition submodule 1123, communication module 113
It connects.
In the present embodiment, I2C controllers 1121 are electrically connected with image capture module 111, for image capture module
CMOS optical sensors in 111 are configured.
In the present embodiment, pretreatment submodule 1122 is electrically connected with image capture module 111, for receiving Image Acquisition
The crossing ambient image that is sent on the CMOS optical sensors of module 111 simultaneously carries out raw-rgb conversions, then to transformed RGB
Data carry out the pretreatments such as Gaussian Blur, HSV and gray scale color conversion, the extraction of black and white part edge.
In the present embodiment, Car license recognition submodule 1123 is electrically connected with the first memory module 114, for first from first
It is taken out in memory module 114 and passes through pretreated crossing ambient image, and the black and white part for mouthful ambient image of satisfying the need carries out two-value
Change, close loop maneuver, profile are searched and take the processing such as rectangle, and cache car plate image nearby；Then carry out rectangle rotation with it is affine
Convert, remove rivet, license plate area Slant Rectify, uniform sizes, each character outline of pick-up board, each character rectangle of pick-up board etc.
Processing, and store treated character related data；By each character scale to fixed proportion and divide again；Finally into line character
Identification, identifies license board information and corresponding additional information, such as body color, vehicle, car speed etc..
In the present embodiment, transmission submodule 1124 is stored with Car license recognition submodule 1123, communication module 113 and first
Module 114 is electrically connected, for realizing the data transmission between the first memory module 114 and Car license recognition submodule 1123, with
And carry out data exchange with communication module 113.
In the present embodiment, communication module 113 is electrically connected with main control chip 112 and power module 116, and passes through network
120 communicate to connect with management terminal 130.Communication module 113 is used for the car plate of over-speed vehicles under the control of main control chip 112
Information is sent to management terminal 130.Communication module 113 be additionally operable to the multiframe vehicle image that image capture module 111 is acquired into
Row compression obtains monitoring video, and monitoring video is sent to management terminal 130.In the present embodiment, communication module 113 may be used also
To receive the parameter configuration of the transmission of management terminal 130, to control the carrying out practically of main control chip 112.That is, master control
Chip 112 controls the working condition of vehicle speed measuring device 110 according to parameter configuration, for example, startup/stopping, monitoring video
Transmission etc..
As an implementation, communication module 113 can be TI (Texas Instruments, Texas Instrument) Da Fen
Very (DaVinci) series DSP chip, the series DSP chip are at the high-performance in terms of being specifically used to do Image Acquisition and processing
Chip is managed, Video service application is mainly directed towards, is cut out for the application such as digital video, image sampling processing, visual analysis
And optimization.
In the present embodiment, the first memory module 114 is electrically connected with main control chip 112, and is electrically connected with power module 116
It connects.First memory module 114 is for caching the multiframe vehicle image that image capture module 111 acquires in real time, as one
Kind embodiment, the first memory module 114 may be, but not limited to, DRAM, and (Dynamic Random Access Memory are moved
State random access memory), SRAM (Static Random-Access Memory, Static RAM) etc., for example, DDR
(Double Data Rate, Double Data Rate synchronous DRAM).
In the present embodiment, the second memory module 115 is electrically connected with main control chip 112, and is electrically connected with power module 116
It connects.Second memory module 115 is used to store the arrange parameter that user is configured vehicle speed measuring device 110 and vehicle is surveyed
The product identification information of the product identification information of speed variator 110, vehicle speed measuring device 110 includes product export information, product IDs
Etc..As an implementation, the second memory module 115 can be EEPROM (Electrically Erasable
Programmable read only memory, Electrically Erasable Programmable Read-Only Memory), FLASH flash memories etc..
In the present embodiment, power module 116 and image capture module 111, main control chip 112, communication module 113, the
One memory module 114, the second memory module 115 are electrically connected, and power module 116 is used for as image capture module 111, master control core
Piece 112, communication module 113, the first memory module 114, the second memory module 115 provide supply of electric power.
In the present embodiment, network 120 can be cable network or wireless network, for example, Ethernet, WIFI etc..
In the present embodiment, management terminal 130 is communicated to connect with vehicle speed measuring device 110, and management terminal 130 is for receiving
The license board information and monitoring video of the over-speed vehicles that vehicle speed measuring device 110 is sent simultaneously are stored.
In the present embodiment, management terminal 130 can also send parameter configuration to vehicle speed measuring device 110, with right
Vehicle speed measuring device 110 is configured and is controlled, for example, control startup/stopping of vehicle speed measuring device 110, monitoring video
Send etc..
Fig. 4 is please referred to, Fig. 4 shows the work flow diagram for the vehicle speed measuring device 110 that the embodiment of the present invention is provided.Vehicle
The workflow of speed measuring device 110 includes：
Step S1, the multiframe vehicle image of 111 real-time collection vehicle of image capture module, and multiframe vehicle image is sent out
It send to main control chip 112.
Step S2, main control chip 112 carry out multiframe vehicle image Car license recognition and obtain in every frame vehicle image successively
License board information, then the current vehicle speed that each vehicle is determined in analysis, and foundation are carried out to the license board information in multiframe vehicle image
The current vehicle speed of each vehicle judges whether over-speed vehicles, when there are control communication module 113 when over-speed vehicles to incite somebody to action for judgement
The license board information of over-speed vehicles is sent to management terminal 130.
In the present embodiment, main control chip 112 carries out multiframe vehicle image using existing Recognition Algorithm of License Plate successively
Car license recognition obtains the license board information in every frame vehicle image, and details are not described herein.Main control chip 112 identifies every frame vehicle figure
After license board information as in, the current vehicle speed that each vehicle is determined in analysis is carried out to the license board information in multiframe vehicle image
Method may include：
First, the first license board information in the first frame vehicle image in first frame vehicle image is obtained, wherein the first vehicle
Board information is any one license board information in first frame vehicle image, for example, first frame vehicle image includes license board information
A, license board information B and license board information C, then the first license board information can be in license board information A, license board information B and license board information C
Any one.
Then, in the other vehicle images of the continuous multiframe of first frame vehicle image, detect the first license board information head
The target frame vehicle image of secondary disappearance or another predeterminable area in arrival vehicle image, for example, if first frame vehicle
License board information A is detected in image, and in the 30th frame vehicle image, license board information A disappears for the first time, then the 30th frame vehicle figure
As being target frame vehicle image, predeterminable area can be the image-region that user sets in advance, for example, left side in image
1/10 region or the region on right side 1/10.
Finally, according to the frame number between first frame vehicle image and target frame vehicle image, the first license board information is calculated
The current vehicle speed of corresponding vehicle, due to image capture module 111 as CMOS camera secured if when mounted angle with away from
From, therefore distance of the picture width of the vehicle image of the acquisition of image capture module 111 in actual scene is a fixed value
(for example, 10m)；In addition, the frame per second per second for capturing picture of image capture module 111 is also a fixed value (for example, 60fps),
It is then 16.67ms per the interval time between frame vehicle image.It therefore, can be according to first frame vehicle image and target frame vehicle
Frame number between image calculates the time interval between first frame vehicle image and the target frame vehicle image, for example, such as
Fruit target frame vehicle image is the 30th frame vehicle image, then the frame number between first frame vehicle image and target frame vehicle image is
30, time interval 30*16.67ms=0.5s；It is acquired again according to time interval (for example, 0.5s) and vehicle speed measuring device 110
Default picture width (for example, 10m) when vehicle image, determines the current vehicle speed of the corresponding vehicle of the first license board information, example
Such as, vehicle has travelled 10m within the time of 30 frames, that is, the distance of 10m has been travelled in 0.5s, therefore the vehicle is corresponding
Speed is 20m/s namely 72km/h.
In the present embodiment, the method that the current vehicle speed according to each vehicle judges whether over-speed vehicles can be：
Judge whether the current vehicle speed of each vehicle is more than preset vehicle speed (for example, 100km/h) one by one first；When any one vehicle
When current vehicle speed is more than preset vehicle speed, judge the vehicle for over-speed vehicles.
Step S3, communication module 113 compresses multiframe vehicle image to obtain monitoring video, and monitoring video is sent
To management terminal 130.
The operation principle for the vehicle speed measuring device 110 that the embodiment of the present invention is provided is：First, image capture module 111
The multiframe vehicle image of real-time collection vehicle, and multiframe vehicle image is sent to main control chip 112；Then, main control chip
112 pairs of multiframe vehicle images carry out Car license recognition and obtain the license board information in every frame vehicle image successively, then to multiframe vehicle figure
License board information as in carries out the current vehicle speed that each vehicle is determined in analysis, and is according to the judgement of the current vehicle speed of each vehicle
No there are over-speed vehicles, when there are control communication module 113 when over-speed vehicles to be sent to the license board information of over-speed vehicles for judgement
Management terminal 130；Finally, communication module 113 compresses multiframe vehicle image to obtain monitoring video, and monitoring video is sent out
It send to management terminal 130.
In conclusion a kind of vehicle speed measuring device provided in an embodiment of the present invention and method, the vehicle speed measuring device packet
Image capture module, main control chip and communication module are included, image capture module, main control chip, communication module are sequentially connected electrically, and
For communication module for being connect with management terminal communications, image capture module, main control chip and communication module are integrated in same pcb board
On；Image capture module is used for the multiframe vehicle image of real-time collection vehicle, and multiframe vehicle image is sent to master control core
Piece；Main control chip obtains the license board information in every frame vehicle image for carrying out Car license recognition successively to multiframe vehicle image, then
The current vehicle speed that each vehicle is determined in analysis, and working as according to each vehicle, are carried out to the license board information in multiframe vehicle image
Preceding speed judges whether over-speed vehicles, when there are control communication module when over-speed vehicles to believe the car plate of over-speed vehicles for judgement
Breath is sent to management terminal；Communication module is additionally operable to be compressed to obtain monitoring video to multiframe vehicle image, and monitoring is recorded
As being sent to management terminal.Compared with prior art, vehicle speed measuring device integrated level height provided in an embodiment of the present invention, volume
Small, installation and maintenance is easy, while eliminating narrow wave radar, and product overall cost is relatively low, in addition, since FPGA/ASIC is parallel
The calculating speed of the characteristics of calculating, vehicle speed measuring device are higher, can support higher resolution ratio and frame number and higher knowledge
Other precision.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should be noted that：Similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and is explained.
Claims (9)
1. a kind of vehicle speed measuring device, which is characterized in that the vehicle speed measuring device include image capture module, main control chip and
Communication module, described image acquisition module, main control chip, communication module are sequentially connected electrically, and the communication module is used for and pipe
Terminal communication connection is managed, described image acquisition module, main control chip and communication module are integrated on same pcb board；
Described image acquisition module is used for the multiframe vehicle image of real-time collection vehicle, and the multiframe vehicle image is sent
To the main control chip；
The main control chip obtains the vehicle in every frame vehicle image for carrying out Car license recognition successively to the multiframe vehicle image
Board information, then the current vehicle speed that each vehicle is determined in analysis is carried out to the license board information in multiframe vehicle image, and according to every
The current vehicle speed of a vehicle judges whether over-speed vehicles, when there are control the communication module when over-speed vehicles by institute for judgement
The license board information for stating over-speed vehicles is sent to the management terminal；
The communication module is additionally operable to be compressed to obtain monitoring video to the multiframe vehicle image, and by the monitoring video
It is sent to the management terminal.
2. vehicle speed measuring device as described in claim 1, which is characterized in that the main control chip includes in FPGA, ASIC
It is at least one.
3. vehicle speed measuring device as described in claim 1, which is characterized in that the vehicle speed measuring device further includes the first storage
Module and the second memory module, first memory module and second memory module are electrically connected with the main control chip,
First memory module is for caching the multiframe vehicle image that described image acquisition module acquires in real time；Described second
Memory module is used to store the arrange parameter and the vehicle speed measuring device that user is configured the vehicle speed measuring device
Product identification information.
4. vehicle speed measuring device as claimed in claim 3, which is characterized in that first memory module includes DRAM, SRAM
At least one of；Second memory module includes at least one of EEPROM and FLASH flash memories.
5. vehicle speed measuring device as described in claim 1, which is characterized in that the vehicle speed measuring device further includes power supply mould
Block, the power module are electrically connected with described image acquisition module, main control chip and network communication interface, the power module
For providing supply of electric power for described image acquisition module, main control chip and network communication interface.
6. a kind of vehicle speed measuring method, which is characterized in that it is applied to claim 1-5 any one of them vehicle speed measuring devices,
The vehicle speed measuring method includes：
The multiframe vehicle image of the real-time collection vehicle of described image acquisition module, and the multiframe vehicle image is sent to institute
State main control chip；
The main control chip carries out Car license recognition to the multiframe vehicle image and obtains the car plate letter in every frame vehicle image successively
Breath, then the current vehicle speed that each vehicle is determined in analysis is carried out to the license board information in multiframe vehicle image, and according to each vehicle
Current vehicle speed judge whether over-speed vehicles, when judgement there are the communication module is controlled when over-speed vehicles will be described super
The license board information of fast vehicle is sent to the management terminal；
The communication module compresses the multiframe vehicle image to obtain monitoring video, and the monitoring video is sent to
The management terminal.
7. vehicle speed measuring method as claimed in claim 6, which is characterized in that the license board information in the vehicle image to multiframe
The step of current vehicle speed of each vehicle is determined in analysis is carried out, including：
Obtain the first license board information in first frame vehicle image, wherein first license board information is the first frame vehicle
Any one license board information in image；
With the other vehicle images of the continuous multiframe of first frame vehicle image, first license board information is detected for the first time
Disappearance or the target frame vehicle image for reaching another predeterminable area in vehicle image；
According to the frame number between the first frame vehicle image and the target frame vehicle image, the first license board information pair is calculated
The current vehicle speed for the vehicle answered.
8. vehicle speed measuring method as claimed in claim 7, which is characterized in that described according to the first frame vehicle image and institute
The step of stating the frame number between target frame vehicle image, calculating the current vehicle speed of the corresponding vehicle of the first license board information, including：
According to the frame number between the first frame vehicle image and the target frame vehicle image, the first frame vehicle is calculated
Time interval between image and the target frame vehicle image；
Default picture width when according to the time interval and the vehicle speed measuring device collection vehicle image, determines first
The current vehicle speed of the corresponding vehicle of license board information.
9. vehicle speed measuring method as claimed in claim 6, which is characterized in that the current vehicle speed of each vehicle of foundation judges
The step of with the presence or absence of over-speed vehicles, including：
Judge whether the current vehicle speed of each vehicle is more than preset vehicle speed one by one；
When the current vehicle speed of any one vehicle is more than preset vehicle speed, judge the vehicle for over-speed vehicles.
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