CN208027569U - A kind of license plate recognition device and system - Google Patents
A kind of license plate recognition device and system Download PDFInfo
- Publication number
- CN208027569U CN208027569U CN201820492241.6U CN201820492241U CN208027569U CN 208027569 U CN208027569 U CN 208027569U CN 201820492241 U CN201820492241 U CN 201820492241U CN 208027569 U CN208027569 U CN 208027569U
- Authority
- CN
- China
- Prior art keywords
- controller
- license plate
- plate recognition
- recognition device
- angle value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Traffic Control Systems (AREA)
Abstract
The utility model provides a kind of license plate recognition device and system, is related to technical field of electronic control.The license plate recognition device includes ambient light sensor, controller and imaging sensor, and ambient light sensor, imaging sensor are electrically connected with the controller；Ambient light sensor is used to acquire the environment bright angle value of current environment, and environment bright angle value is sent to controller；Controller is used to be worth to the time for exposure according to environmental light brightness, and controls imaging sensor collection vehicle image information according to the time for exposure；Controller is additionally operable to obtain the vehicle image information of imaging sensor acquisition, and identifies license board information according to vehicle image information.The application acquires environment bright angle value by ambient light sensor, improves the accuracy of detection of environment bright angle value, and then improves the accuracy rate of license board information identification.
Description
Technical field
The utility model is related to technical field of electronic control, in particular to a kind of license plate recognition device and system.
Background technology
Existing Vehicle License Plate Recognition System detects environmental light brightness usually using photo resistance, and then realizes automatic exposure, by
It is not high and can be influenced by factors such as temperature in photo resistance measurement accuracy, thus can cause to spectrum assignment inaccuracy into
And influence the accuracy rate of Car license recognition.
Utility model content
The purpose of this utility model is to provide a kind of license plate recognition device and system, which uses environment
Optical sensor acquires the environment bright angle value of current environment, improves the accuracy of detection of environment bright angle value, and then improve vehicle
The recognition accuracy of board information.
The utility model is realized in this way：
In a first aspect, the utility model embodiment provides a kind of license plate recognition device, including ambient light sensor, control
Device and imaging sensor, the ambient light sensor, described image sensor are electrically connected with the controller；The ambient light
Sensor is used to acquire the environment bright angle value of current environment, and the environment bright angle value is sent to the controller；Institute
Controller is stated for being worth to the time for exposure according to the environmental light brightness, and described image is controlled according to the time for exposure and is passed
Sensor collection vehicle image information；The controller is additionally operable to obtain the vehicle image letter of described image sensor acquisition
Breath, and license board information is identified according to the vehicle image information.
Second aspect, the utility model embodiment provide a kind of Vehicle License Plate Recognition System, including server, gate and such as the
License plate recognition device described in one side, the server are communicated to connect with the license plate recognition device and the gate；Institute
License plate recognition device is stated for the license board information to be sent to the server；The server is used to be believed according to the car plate
Breath controls the gate with default license board information and is turned on and off.
Compared with the prior art, the utility model has the advantages that：A kind of Car license recognition provided by the utility model
Apparatus and system, the license plate recognition device acquire the environment bright angle value of current environment, controller by ambient light sensor
It is worth to the time for exposure according to environmental light brightness, and imaging sensor collection vehicle image information is controlled according to the time for exposure.By
There is higher acquisition precision in ambient light sensor, and will not be affected by temperature, there is higher stability, with ring
The raising of the accuracy of detection and stability of border brightness values, the time for exposure that the controller obtains is more accurate, and described image passes
The vehicle image information of sensor acquisition can be also more clear, the license board information meeting that the controller is extracted according to vehicle image information
It is more accurate, improve the discrimination of license plate recognition device.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment cited below particularly, and
The appended attached drawing of cooperation, is described in detail below.
Description of the drawings
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.Therefore, below to attached
The detailed description of the embodiments of the present invention provided in figure is not intended to limit claimed the scope of the utility model,
But it is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without creative efforts belongs to the model of the utility model protection
It encloses.
Fig. 1 shows the structure diagram of Vehicle License Plate Recognition System provided by the utility model；
Fig. 2 shows the structure diagrams of license plate recognition device provided by the utility model；
Fig. 3 shows the circuit connection diagram of ambient light sensor provided by the utility model；
Fig. 4 shows the circuit connection diagram of imaging sensor provided by the utility model.
Icon：1- Vehicle License Plate Recognition Systems；10- license plate recognition devices；11- ambient light sensors；111- photodiodes；
112- amplifiers；113- analog-digital converters；114- filters；115-I2C interface modules；12- imaging sensors；13- controllers；
14- light compensating lamps；15- memories；16- communication modules；17- power modules；20- servers；30- gate；40- terminal devices.
Specific implementation mode
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.Therefore, the detailed description of the embodiments of the present invention to providing in the accompanying drawings is not intended to limit below
Claimed the scope of the utility model, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, the every other embodiment that those skilled in the art are obtained without making creative work, all
Belong to the range of the utility model protection.
As shown in Figure 1, for the structure diagram of Vehicle License Plate Recognition System 1 provided by the utility model, the Vehicle License Plate Recognition System 1
It can be used for the scenes such as parking lot, cell, highway and urban road, can fast and accurately be known by Vehicle License Plate Recognition System 1
The license board information of other vehicular traffic.
The Vehicle License Plate Recognition System 1 includes license plate recognition device 10, server 20 and gate 30, the server 20 and institute
It states license plate recognition device 10 and the gate 30 communicates to connect.
In the present embodiment, the license plate recognition device 10 is used to license board information being sent to the server 20；It is described
Server 20 is used to control the gate 30 with default license board information according to the license board information and be turned on and off.
In the present embodiment, the Vehicle License Plate Recognition System 1 still further comprises terminal device 40, and terminal device 40 is for showing
Show the license board information that the server 20 is sent, is additionally operable to be manually entered failure license board information.It is appreciated that the failure
License board information refers to the license board information that the license plate recognition device 10 is not identified from vehicle image information.
In the present embodiment, mobile phone, tablet computer or low-end computer may be used in the terminal device 40.
As shown in Fig. 2, the license plate recognition device 10 includes ambient light sensor 11, controller 13 and imaging sensor
12, the ambient light sensor 11, described image sensor 12 are electrically connected with the controller 13.
In the present embodiment, the ambient light sensor 11 is used to acquire the environment bright angle value of current environment, and by institute
It states environment bright angle value and is sent to the controller 13.It is installed it is appreciated that current environment refers to the ambient light sensor 11
The environment of position.
As shown in figure 3, the ambient light sensor 11 includes photodiode 111, amplifier 112, filter 114 and mould
Number converter 113 (Analog-to-Digital Converter, ADC), the photodiode 111, amplifier 112, filtering
Device 114 and the analog-digital converter 113 are sequentially connected electrically, and the analog-digital converter 113 is electrically connected with the controller 13.
In the present embodiment, the photodiode 111 is used to the optical signal of the current environment being converted into electric signal.
In the present embodiment, the amplifier 112, which is used to the electric signal being amplified processing, obtains amplification electric signal,
Current amplifier may be used in the amplifier 112.
In the present embodiment, the filter 114 is used to be filtered the amplification electric signal to obtain filtering letter
Number, the filter 114 filters out the interference wave in the amplified signal, for example, the direct current signal that the amplification electric signal is 5V,
The interference wave is the AC signal that frequency is 100Hz, then the filter 114 carries out the AC signal that frequency is 100Hz
It filters out, retains the direct current signal of 5V, low-pass filter (Low Pass Filter, LPF) may be used in the filter 114.
In the present embodiment, the analog-digital converter 113 is used to the filtering signal carrying out analog-to-digital conversion, obtains described
Environment bright angle value, and the environment bright angle value is sent to the controller 13.
Further, the ambient light sensor 11 further includes I2C interface module 115, and the analog-digital converter 113 passes through
The I2C interface module 115 is electrically connected with the controller 13.The ambient light sensor 11 passes through the I2C interface module
The environment bright angle value is sent to the controller 13 by 115.
The I2C interface module 115 includes the first data terminal SDA and the first clock end SCL, the first data terminal SDA
It is electrically connected with controller 13 with the first clock end SCL.The I2C interface module 115 passes through the first data terminal SDA
The environment bright angle value is sent to the controller 13 with the first clock end SCL.
For example, when the I2C interface module 115 is idle, the first data terminal SDA and the first clock end SCL are
High level, when the first clock end SCL is between high period, the first data terminal SDA is changed from high level to low level
Indicate initial signal, then the I2C interface module 115 starts to transmit environment bright angle value to the controller 13, when described the
For one clock end SCL between high period, the first data terminal SDA changes from low level to high level indicates termination signal, institute
I2C interface module 115 is stated to finish to the transmission of the controller 13 environment bright angle value.
In another embodiment, the ambient light sensor 11 can also pass through universal asynchronous receiving-transmitting (Universal
Asynchronous Receiver/Transmitter, UART) interface module or serial peripheral (Serial Peripheral
Interface, SPI) environment bright angle value is sent to the controller 13 by interface module.
In the present embodiment, environment bright angle value pass corresponding with the time for exposure can be pre-set in the controller 13
System, the controller 13, can be according to pre-set right when getting the environment bright angle value of the transmission of ambient light sensor 11
It should be related to and obtain the environment bright angle value corresponding time for exposure, and the time for exposure is sent to imaging sensor 12.At this
In embodiment, if the environment bright angle value of current environment is larger, the corresponding time for exposure is shorter；If the environment of current environment
Brightness values are smaller, then its corresponding time for exposure is longer.If for example, the local environment at this time of the ambient light sensor 11 is bright
Degree is partially dark, and the obtained environment bright angle value is 2, the environment bright angle value and set in advance that the controller 13 is 2 according to value
The correspondence set obtain the corresponding time for exposure be 6；If the brightness of the local environment at this time of the ambient light sensor 11 is partially bright,
The obtained environment bright angle value is 6, environment bright angle value and pre-set correspondence of the controller 13 according to value for 6
Relationship obtain the corresponding time for exposure be 2.
In the present embodiment, the imaging sensor 12 according to the time for exposure of reception can control shutter opening after it is lasting when
Between.For example, the acquisition of imaging sensor 12 is 1 second when former frame vehicle image information needs the time, if the brightness of current environment is inclined
Secretly, the time for exposure of reception is 1 second, then imaging sensor 12 works as the entire period of former frame vehicle image information in acquisition,
Control shutter is always maintained at opening state, to increase light inlet；If the brightness of current environment is partially bright, the time for exposure of reception
It it is 0.2 second, then described image sensor 12 in acquisition when the entire period of former frame vehicle image information, open by control shutter
Duration be 0.2 second, duration of closing is 0.8 second, to reduce light inlet.Therefore, described image sensor
12 can control the inlet of light in the environment of different brightness according to the different time for exposure so that the vehicle image of acquisition
Information is more accurate.
As shown in figure 4, described image sensor 12 includes output end DOUT, the second data terminal SDATA and second clock end
SCLK, the output end DOUT, the second data terminal SDATA and the second clock end SCLK are electric with the controller 13
Connection.
In the present embodiment, described image sensor 12 is received by the second data terminal SDATA and second clock end SCLK
The time for exposure that the controller 13 is sent.
For example, when imaging sensor 12 is idle, the second data terminal SDATA and second clock end SCLK are high electricity
Flat, when second clock end SCLK is between high period, the second data terminal SDATA is indicated from high level to low level variation
Beginning signal, then controller 13 start to described image sensor 12 transmit the time for exposure, when the second clock end SCLK be height
During level, the second data terminal SDATA changes from low level to high level indicates termination signal, and the controller 13 is to institute
State imaging sensor 12 transmit the time for exposure finish.
In the present embodiment, described image sensor 12 is sent the vehicle image information by the output end DOUT
To the controller 13.It is appreciated that the output end DOUT is set as multiple, for example, DOUT0, DOUT1 in Fig. 4,
DOUT2, DOUT3, DOUT4, DOUT5, DOUT6, DOUT7, DOUT8, DOUT9, DOUT10 and DOUT11.
In the present embodiment, described image sensor 12 may be used cmos sensor, and the cmos sensor can be by
The devices such as light-sensitive element, amplifier element, A/D converter, memory element, digital signal processor and Computer interface circuit are integrated
It is formed on one piece of silicon chip.
In other embodiments, described image sensor 12 can also receive the exposure by UART buses or spi bus
Between light time.
In the present embodiment, the controller 13 is additionally operable to obtain the vehicle image that described image sensor 12 acquires
Information, and license board information is identified according to the vehicle image information.
In the present embodiment, the controller 13 is handled including but not limited to following place to the vehicle image information
Reason mode, the controller 13 first carry out raw-rgb format conversion processings to the vehicle image information and obtain the reality of rgb formats
When image information；Gaussian Blur, HSV and gray scale color conversion, black and white part edge is carried out to the real-time image information again to carry
It the pretreatments such as takes, and binaryzation, close loop maneuver, profile will be carried out by the black and white part of pretreated real-time image information and searched
Processing license plate image information is obtained after the processing such as rectangle with taking；The license plate image information is cached again；Then square is carried out
Shape rotate with affine transformation, go rivet, license plate area Slant Rectify, uniform sizes, each character outline of pick-up board, pick-up board each
The processing such as a character rectangle, and store treated character related data；By each character scale to fixed proportion and divide again；
Character recognition is finally carried out, license board information is obtained.
In the present embodiment, field programmable gate array (Field-may be used in the controller 13
Programmable Gate Array, FPGA) chip, application-specific integrated circuit (Application Specific
Integrated Circuit, ASIC) chip, micro-control unit (Microcontroller Unit, MCU) chip or number letter
Number processing (Digital Signal Processing, DSP) chip.
In the present embodiment, the license plate recognition device 10 still further comprises light compensating lamp 14, the light compensating lamp 14 and institute
State the electrical connection of controller 13.
The controller 13, which is additionally operable to control the light compensating lamp 14 according to the environment bright angle value, to be turned on and off.
In the present embodiment, when environment bright angle value is less than or equal to preset value (for example, 4), controller 13 controls institute
The unlatching of light compensating lamp 14 is stated, to improve the brightness of 11 local environment of ambient light sensor；When environment bright angle value is more than the preset value
When, controller 13 controls the closing of the light compensating lamp 14.
In the present embodiment, the license plate recognition device 10 still further comprises memory 15, the memory 15 and institute
State the electrical connection of controller 13.
The memory 15 is used to cache the vehicle image information of the reception of the controller 13.It is appreciated that described
Memory 15 is used for caching process license plate image information, and the controller 13 first believes the treated processing license plate image
Breath be buffered in the memory 15, the controller 13 to the processing license plate image information progress in the subsequent processing, again from
The processing license plate image information is extracted in the memory 15.It can increase the controller 13 by the memory 15
Data buffer storage capacity, and then improve the processing speed of the controller 13.
The memory 15 may be used Double Data Rate synchronous DRAM 15 (Double Data Rate,
DDR)。
In the present embodiment, the license plate recognition device 10 still further comprises communication module 16, the communication module 16
It is electrically connected with the controller 13, the communication module 16 is communicated to connect with the server 20.
The communication module 16 includes communication chip and communication interface, the communication chip and the controller 13, described
Communication interface is electrically connected, and the communication interface is communicated to connect with the server 20.
The communication chip is for compressing the license board information, and by the communication interface by compressed institute
It states license board information and is sent to the server 20.
Digital Signal Processing (Digital Signal Processing, DSP) core can be used in the communication chip
The chip of TI companies Leonardo da Vinci's series can be used in piece, the dsp chip.
Network interface can be used in the communication interface or universal serial bus (Universal Serial Bus, USB) connects
Mouthful.
In the present embodiment, the license plate recognition device 10 still further comprises power module 17, the power module 17
With the ambient light sensor 11, the controller 13, described image sensor 12, light compensating lamp 14, memory 15, communication module
16 are electrically connected.
In the present embodiment, the power module 17 may include battery supply and system power supply, the battery supply and
System power supply is electrically connected with the ambient light sensor 11, the controller 13, described image sensor 12, the system electricity
Source is also electrically connected with the battery supply；It is appreciated that the system power supply is connect with power grid, if the power grid is in energization shape
State, the system power supply are that the license plate recognition device 10 provides operating voltage, and charges to the battery supply；If the electricity
Net is in off-position, and the battery supply is that the license plate recognition device 10 provides operating voltage.
In conclusion the license plate recognition device acquires the environment bright angle value of current environment by ambient light sensor,
And the environment bright angle value is sent to the controller, when the controller is worth to exposure according to the environmental light brightness
Between, and described image sensor collection vehicle image information is controlled according to the time for exposure, the controller obtains the figure
As the vehicle image information that sensor acquires, and license board information is identified according to the vehicle image information.Due to environment
Optical sensor has higher acquisition precision, and will not be affected by operating temperature, has higher stability, with environment
The raising of the accuracy of detection and stability of brightness values, the time for exposure that the controller obtains is more accurate, described image sensing
The vehicle image information of device acquisition can be also more clear, and the controller can be more according to the license board information that vehicle image information is extracted
It is accurate to add, and improves the discrimination of license plate recognition device.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, can also be electrical connection；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in 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.
In the description of the present invention, it should be noted that term "upper", "lower", "left", "right", "inner", "outside" etc.
The orientation or positional relationship of instruction be based on the orientation or positional relationship shown in the drawings or the utility model product use when
The orientation or positional relationship usually put, is merely for convenience of describing the present invention and simplifying the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the utility model.The above descriptions are merely preferred embodiments of the present invention, and it is new to be not limited to this practicality
Type, for those skilled in the art, the present invention may have various modifications and changes.All essences in the utility model
God and principle within, any modification, equivalent replacement, improvement and so on, should be included in the scope of protection of the utility model it
It is interior.
Claims (10)
1. a kind of license plate recognition device, which is characterized in that including ambient light sensor, controller and imaging sensor, the ring
Border optical sensor, described image sensor are electrically connected with the controller；
The ambient light sensor is used to acquire the environment bright angle value of current environment, and the environment bright angle value is sent to
The controller；
The controller is used to be worth to the time for exposure according to the environmental light brightness, and according to described in time for exposure control
Imaging sensor collection vehicle image information；
The controller is additionally operable to obtain the vehicle image information of described image sensor acquisition, and according to the vehicle figure
As information identifies license board information.
2. license plate recognition device as described in claim 1, which is characterized in that the ambient light sensor includes two pole of photoelectricity
Pipe, amplifier, filter and analog-digital converter, the photodiode, amplifier, filter and the analog-digital converter are successively
Electrical connection, the analog-digital converter are electrically connected with the controller；
The photodiode is used to the optical signal of the current environment being converted into electric signal；
The amplifier, which is used to the electric signal being amplified processing, obtains amplification electric signal；
The filter is for being filtered the amplification electric signal to obtain filtering signal；
The analog-digital converter is used to the filtering signal carrying out analog-to-digital conversion, obtains the environment bright angle value, and by institute
It states environment bright angle value and is sent to the controller.
3. license plate recognition device as claimed in claim 2, which is characterized in that the ambient light sensor further includes I2C interface
Module, the analog-digital converter are electrically connected by the I2C interface module with the controller.
4. license plate recognition device as claimed in claim 3, which is characterized in that the I2C interface module includes the first data terminal
With the first clock end, first data terminal and first clock end are electrically connected with the controller.
5. license plate recognition device as claimed in claim 2, which is characterized in that the ambient light sensor further includes UART interface
Module or SPI interface module, the analog-digital converter pass through the UART interface module or the SPI interface module and the control
Device electrical connection processed.
6. license plate recognition device as described in claim 1, which is characterized in that the license plate recognition device further includes light compensating lamp,
The light compensating lamp is electrically connected with the controller；
The controller is additionally operable to be turned on and off according to the environment bright angle value control light compensating lamp.
7. license plate recognition device as described in claim 1, which is characterized in that the license plate recognition device further includes power supply mould
Block, the power module are electrically connected with the ambient light sensor, the controller, described image sensor.
8. license plate recognition device as described in claim 1, which is characterized in that the license plate recognition device further includes memory,
The memory is electrically connected with the controller；
The memory is used to cache the vehicle image information that the controller receives.
9. license plate recognition device as described in claim 1, which is characterized in that the controller is using fpga chip, ASIC cores
Piece, MCU chip or dsp chip.
10. a kind of Vehicle License Plate Recognition System, which is characterized in that including server, gate and such as claim 1-9 any one of them
License plate recognition device, the server are communicated to connect with the license plate recognition device and the gate；
The license plate recognition device is used to the license board information being sent to the server；
The server is used to control the gate with default license board information according to the license board information and be turned on and off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820492241.6U CN208027569U (en) | 2018-04-04 | 2018-04-04 | A kind of license plate recognition device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820492241.6U CN208027569U (en) | 2018-04-04 | 2018-04-04 | A kind of license plate recognition device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208027569U true CN208027569U (en) | 2018-10-30 |
Family
ID=63908714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820492241.6U Expired - Fee Related CN208027569U (en) | 2018-04-04 | 2018-04-04 | A kind of license plate recognition device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208027569U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114125316A (en) * | 2021-11-27 | 2022-03-01 | 深圳市天启时代科技有限公司 | Remote image processing method and system |
-
2018
- 2018-04-04 CN CN201820492241.6U patent/CN208027569U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114125316A (en) * | 2021-11-27 | 2022-03-01 | 深圳市天启时代科技有限公司 | Remote image processing method and system |
| CN114125316B (en) * | 2021-11-27 | 2024-04-05 | 深圳市天启时代科技有限公司 | Remote image processing method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2003521768A (en) | Wireless remote meter reading system of integrating meter and wireless remote meter reading method | |
| CN101976512B (en) | System and method for automatically responding vehicle position in underground parking garage | |
| CN205102880U (en) | All -weather monitoring system of gauge and device based on image | |
| CN107123275A (en) | Road side equipment based on geomagnetic wake-up radar ranging technology and application method thereof | |
| CN208027569U (en) | A kind of license plate recognition device and system | |
| CN210244508U (en) | Sharing treasured device and system of renting that charges | |
| CN208027571U (en) | A kind of vehicle speed measuring equipment | |
| CN207008867U (en) | Roadside equipment based on ground magnetism awakens radar range finding technique up | |
| CN105868704A (en) | Smart electricity meter based on image detection | |
| CN202795750U (en) | Embedded image processing based license plate indentifying WSN (wireless sensor network) node | |
| CN110956814A (en) | ETC portal license plate accurate identification method, system and equipment | |
| CN208722268U (en) | Intelligent parking taximeter based on Internet of Things | |
| CN108320531A (en) | A kind of speed measuring equipment and velocity-measuring system | |
| CN111599029A (en) | Simplified parking lot type road side equipment | |
| CN113569599A (en) | Vehicle charging alignment method, charging device and storage medium | |
| CN208027376U (en) | A kind of peccancy detection device and monitoring device | |
| CN208027572U (en) | A kind of speed measuring equipment and velocity-measuring system | |
| CN203012798U (en) | Full-automatic expressway vehicle charging system | |
| CN108171991A (en) | A kind of identification controller and Vehicle License Plate Recognition System | |
| CN112379362B (en) | Event self-adaptive acquisition equipment and method based on multi-source data fusion | |
| CN201946113U (en) | License plate recognition device with high-definition image snapshot function | |
| CN213483108U (en) | Low-power-consumption parking management system based on combination of video and geomagnetism | |
| CN208029009U (en) | Its net monitoring device and system | |
| CN208027568U (en) | A kind of detection device and monitoring device | |
| CN107228962A (en) | A kind of intelligent type ammeter based on image detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181030 Termination date: 20210404 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |