CN207816806U - A kind of car plate type compartment system - Google Patents
A kind of car plate type compartment system Download PDFInfo
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- CN207816806U CN207816806U CN201721678080.1U CN201721678080U CN207816806U CN 207816806 U CN207816806 U CN 207816806U CN 201721678080 U CN201721678080 U CN 201721678080U CN 207816806 U CN207816806 U CN 207816806U
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Abstract
The utility model discloses a kind of car plate type compartment systems, including：Light source further includes sequentially connected：Optical receiver, optical information analyzer and type identification device；Wherein, light source is used to emit projection light to car plate；Optical information analyzer is used to analyze the spectral power distribution of the reflected light；For type identification device according in the spectral power distribution, the distribution situation of each frequency range light wave judges the type of the car plate.Wherein, optical information analyzer includes：Sequentially connected filter circuit and frequency analysis circuit, the frequency analysis circuit includes sequentially connected light sensor, electric current past circuit and power analysis circuitry, further, circuit obtains circuit can obtain the induced current of light sensor by direct or indirect mode.The system can provide effectively support and reference for the selection of Car license recognition scheme, simple in structure, reliability is high, using effect is good.
Description
Technical field
The utility model is related to Car license recognition field, especially a kind of car plate type compartment system.
Background technology
Increased considerably as national economy is horizontal, people’s lives level also increasingly improves, it is evident that one side,
The car ownership of each department is all to increase steadily on the basis of huge radix.
And increasing with automobile quantity, management workload and management difficulty for automobile just increase therewith, and for
The management aspect of license plate number as identity of automobile mark, just proposes new requirement, wherein and it is most common, it is exactly to car plate
Identification.
It is all made of the car plate of 7 numbers, and for car plate for traditional fossil fuel automobile in China
Size, distribution, character etc. have done Uniform provisions.And in the prior art, a variety of identifying schemes have been formulated also for this kind of car plate,
It is substantially：License Plate, Character segmentation, character recognition, character combination.But this kind of license plate recognition technology is directed to same
The identification of plate template, and for the new energy car plate of nowadays new issue（8）, because tional identification design of scheme is for 7
Car plate（92 formula automotive number plates）Identification, for electric vehicle car plate（New energy car plate）It is None- identified.
Utility model content
The goal of the invention of the utility model is：In view of the above problems, it provides a kind of in identification car plate word
Fu Qian carries out car plate type classification, and then distinguishes scheme for the car plate that Car license recognition selects corresponding scheme to provide foundation.
The technical solution adopted in the utility model is as follows：
A kind of car plate type compartment system, including：Light source further includes sequentially connected：Optical receiver, optical information analyzer
With type identification device；Wherein,
Light source is configured as emitting projection light to car plate；
Optical receiver is configured as the reflected light for receiving the car plate to shown projection light；
Optical information analyzer is configured as analyzing the spectral power distribution of the reflected light；
Type identification device is configured as according in the spectral power distribution, and the distribution situation of each frequency range light wave is judged
The type of the car plate.
Car plate bottom plate accounts for the most areas of car plate, thus, the reflection for light, main concentrate is car plate background color.On
In the power distribution for stating the corresponding each chromatography of reflected light that scheme is directed to car plate, each frequency range light wave（The color that i.e. reflected light includes）
Distribution situation, you can judge the background color of car plate, and according to the background color of car plate, you can confirm the type of number plate of vehicle.
Preferably, system further includes：The filter being connected between optical information analyzer and optical receiver, for filtering out
The reflected light of the car plate lateral middle above section.
Alternatively, system further includes, it is set on the optical receiver, for blocking the car plate lateral middle with top
The reflected light divided blocks device.So that optical receiver does not receive in car plate reflected light, car plate lateral middle above section it is anti-
Penetrate light.This, which is blocked, is interpreted as the reflection to light or absorption.
Said program starting point is：In view of new energy car plate is there are the first half gradual change green situation of kart,
By filtering out the reflected light of the part, frequency range light wave is not influenced reaching（Color）In the case of accounting, hence it is evident that reduce because of color
The calculation amount caused by spectral power distribution dispersion caused by gradual change, and then improve and distinguish efficiency.
Preferably, the above-mentioned type arbiter, according in the spectral power distribution, the distribution accounting of green frequency range light wave
Whether reach preset value, differentiates that the car plate is traditional car plate or new energy car plate.The judgement of the accounting can be used such as simulation electricity
Road or digital circuit（Such as gate circuit）Decision circuitry realize, existing method or program can also be used and realize, such as computer program stored
PLC etc..
Background color distinguishing characteristics of the program based on the existing car plate type in China, i.e., reach preset value for background color green accounting
Car plate, be judged as new energy car plate（Including small-sized new energy car plate and large-scale new energy car plate）.
Further, optical information analyzer includes：
Filter circuit exports the light wave of several frequency ranges for the reflected light received to be filtered；
Spectrum analyzer circuit, the spectral power distribution of the light wave for analyzing several frequency ranges.Such as pass through light power meter
The power of each frequency range light wave is obtained, then by simple statistical method, obtains the power distribution situation of each frequency range light wave.
This programme concentrates the spectral power distribution situation for the light wave for considering several frequency ranges, and then reduces the discreteness because of spectrum
The calculation amount of the power statistic and distribution of the huge frequency range spectrum brought.
Further, above-mentioned filter circuit is：Allow light through the filter of the light wave corresponding frequency band of several frequency ranges.
Further, above-mentioned several frequency ranges are：Yellow frequency range, green frequency range and blue frequency bands.The selection of program frequency range
For the preferred embodiment made based on the main background color of existing China's car plate, for white background（Full spectral reflectance）And black matrix（Full spectrum is inhaled
It receives）Ideal effect can be reached.
Further, above-mentioned preset value is：In standard new energy car plate, small-sized new-energy automobile number plate or large-scale new energy
In License Plate, in the spectral power distribution of the reflected light of the light source, the smaller value of the distribution accounting of green frequency range light wave；
Or subtract preset error amount for the smaller value.
In view of in new energy car plate, green is dominant hue（Including gradual change green and yellowish green mutation background color）, therefore, selecting
In the case of unified decision threshold, it can meet two kinds of not misjudged requirements of car plate, meanwhile, it is played very with non-new energy car plate
Good differentiation effect.
Preferably, above-mentioned spectrum analyzer circuit includes：
Light sensor, the effect of the light wave for receiving several frequency ranges after the filter circuit is filtered；
Current acquisition circuitry connects the light sensor, and the light wave for obtaining several frequency ranges respectively acts on institute
State the induced current on light sensor；
Power analysis circuitry connects the current acquisition circuitry, for according to the light wave for corresponding to several frequency ranges respectively
Induced current, analyze the spectral power distribution of the light wave of several frequency ranges.The power analysis circuitry is according to electric current and frequency
The contrast relationship of rate obtains frequency of light wave, and then calculates the power of each frequency range light wave, then by simple statistical method,
It can obtain the power distribution of each frequency range.
In view of in photoelectric effect, corresponding illumination can be calculated by electric current in the relationship of electric current and illumination frequency
Frequency information realize and determining frequency of light wave achieved the effect that with simple step, and then get the frequency of light wave pair in turn
The spectral power distribution answered.
Further, above-mentioned current acquisition circuitry is：It is series at the ammeter of the light sensor；Or to be series at
The load of light sensor is stated, and the power meter of the connection load calculates the sense by obtaining the power of the load
Induced current.
In conclusion by adopting the above-described technical solution, the utility model has the beneficial effects that：
By this system, car plate type identification is carried out according to the attributive character of car plate color, to ensure that car plate classification
The accuracy and ease for operation of difference.The system can provide effectively support and reference, Jin Erbao for the selection of Car license recognition scheme
Comprehensive covering to Car license recognition in the market is demonstrate,proved, to ensure effective management to automobile.This programme is simple in structure, reliability is high,
Using effect is good.
Description of the drawings
The utility model will illustrate by example and with reference to the appended drawing, wherein：
Fig. 1 is the structural map of car plate type compartment system.
Fig. 2 is another structural map of car plate type compartment system.
Fig. 3 is the structural map of optical information analyzer in Fig. 2.
Fig. 4 is the structural map of frequency analysis circuit in Fig. 3.
Fig. 5 is one embodiment of car plate type compartment system.
Fig. 6 is one embodiment of current acquisition circuitry in Fig. 4.
Fig. 7 is another embodiment of current acquisition circuitry in Fig. 4.
In figure, 100 be light source, and 200 be car plate, and 300 be optical receiver, and 400 be optical information analyzer, and 500 sentence for type
Other device, 4021 be light sensor, and 4022 be load, and 4023 be ammeter, and 4024 be power meter.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
This specification（Including any accessory claim, abstract）Disclosed in any feature, unless specifically stated,
It is replaced by other equivalent or with similar purpose alternative features.That is, unless specifically stated, each feature is a series of
An example in equivalent or similar characteristics.
As described in figures 1 and 5, present embodiment discloses a kind of 200 type compartment systems of car plate, including：Light source 100, is also wrapped
It includes sequentially connected：Optical receiver 300, optical information analyzer 400 and type identification device 500；Wherein,
Light source 100 is used to emit projection light to car plate 200；
Optical information analyzer 400 is used to analyze the spectral power distribution of the reflected light；
For type identification device 500 according in the spectral power distribution, the distribution situation of each frequency range light wave judges the vehicle
The type of board 200.
In one embodiment, light source 100 selects full spectrum light source or visible light light source, such as LED light（Group）, for
Distribution that can be according to each frequency range light wave spectral power after the spectral power distribution for analyzing each frequency range light wave and default spectrum work(
Rate is distributed and the relationship of the table of comparisons of number plate of vehicle type, judges corresponding number plate of vehicle type.
In one embodiment, as shown in Fig. 2, system further includes：It is connected to optical information analyzer 400 and optical receiver
Filter between 300, the reflected light for filtering out 200 lateral middle above section of the car plate.
Alternatively, system further includes, it is set on the optical receiver 300, for blocking 200 lateral middle of the car plate
The reflected light of above section blocks device.So that optical receiver 300 does not receive in 200 reflected light of car plate, in 200 transverse direction of car plate
The reflected light of portion's above section.This, which is blocked, is interpreted as the reflection to light or absorption.
In one embodiment, type identification device 500, according in the spectral power distribution, green frequency range light wave divides
Whether cloth accounting reaches preset value, differentiates that the car plate 200 is traditional car plate 200 or new energy car plate 200.It is specific at one
In embodiment, according in the spectral power distribution, whether the distribution accounting of green frequency range light wave reaches preset value or more, if
It is then to be determined as new energy car plate 200, otherwise, it is determined that for traditional car plate 200.The program is set as based on existing car plate 200
Rules of arrangement, i.e. 92 formula automotive number plates（7 black, white, yellow, blue bottom number plates）With new energy number plate（8 green bottoms of gradual change and
Yellowish green combination bottom）, for No. 200 identification process of car plate, it is only necessary to differentiate that the car plate 200 belongs to 7 car plates 200 or 8 car plates
200.
In one embodiment, as shown in figure 3, optical information analyzer 400 includes：
Filter circuit exports the light wave of several frequency ranges for the reflected light received to be filtered；
Spectrum analyzer circuit, the spectral power distribution of the light wave for analyzing several frequency ranges.
In one embodiment, above-mentioned filter circuit is：Allow light through the light wave corresponding frequency band of several frequency ranges
Filter.Further, above-mentioned several frequency ranges are：Yellow frequency range, green frequency range and blue frequency bands.Corresponding frequency range is chosen as：
503-520 MHz（Yellow light frequency range）, 530（Or 540）-600MHz（Green light frequency range）, 620-680MHz（Blue light frequency range）.
In one embodiment, above-mentioned preset value is：In standard new energy car plate 200, small-sized new-energy automobile number plate or
In large-scale new-energy automobile number plate, in the spectral power distribution of the reflected light of the light source 100, the distribution of green frequency range light wave
The smaller value of accounting；Or subtract preset error amount for the smaller value.The smaller value is under multigroup experiment, multiple environment
The average value or minimum value of experiment value.The embodiment is based in new energy car plate 200, and green is dominant hue, and for large-scale new
There is certain difference in energy automobile and small-sized new-energy automobile, background color color, specifically, large-scale new-energy automobile is yellow+green
The non-gradual change background color of color, small-sized new-energy automobile is green gradual change background color, but the green accounting of the two is bigger.Such as assume small-sized
New-energy automobile car plate 200 is to LED light（Group）In reflected light, green frequency band power be averaged accounting be 80%, large-scale new-energy automobile
Car plate 200 is to LED light（Group）In reflected light, green frequency band power be averaged accounting be 75%, yellow frequency range accounting be 24%（Consider 1%
The other frequency range light waves influenced for environmental noise）, the standard accounting of the present embodiment can by ecotopia respectively to corresponding
Car plate 200 carries out accounting test and obtains.Provide that tolerance value is 3%, then it is preset value to take 72%, in one example, analysis
Go out in the spectral power distribution of " Guangdong B.D12345 " reflected light, green light frequency band power accounting is 79%, is higher than 73%, then judges the vehicle
Board 200 is new energy car plate 200.
In one embodiment, as shown in figure 4, above-mentioned spectrum analyzer circuit includes：
Light sensor 4021, the effect of the light wave for receiving several frequency ranges after the filter circuit is filtered；
Current acquisition circuitry connects the light sensor 4021, and the light wave for obtaining several frequency ranges respectively acts on
Induced current on the light sensor 4021；
Power analysis circuitry connects the current acquisition circuitry, for according to the light wave for corresponding to several frequency ranges respectively
Induced current, analyze the spectral power distribution of the light wave of several frequency ranges.
Specifically, as shown in figs. 6 or 7, above-mentioned current acquisition circuitry is：It is series at the ammeter of the light sensor 4021
4023；Or to be series at the load 4022 of the light sensor 4021, and the connection load 4022 power meter 4024,
By obtaining the power of the load 4022, the induced current is calculated.
The embodiment is illuminated by the light the characteristic of frequency positive correlation influence based on light-sensitive element, by getting induced current（Directly
It connects or indirectly）, you can the corresponding frequency of the illumination is analyzed, and then counts corresponding spectral power, calculates spectral power
Distribution.
The utility model is not limited to specific implementation mode above-mentioned.The utility model expands to any in this specification
The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group
It closes.
Claims (10)
1. a kind of car plate type compartment system, it is characterized in that, including light source（100）, further include sequentially connected：Optical receiver
（300）, optical information analyzer（400）With type identification device（500）；Wherein,
Light source（100）It is configured as to car plate（200）Emit projection light；
Optical receiver（300）It is configured as receiving the car plate（200）To the reflected light of shown projection light；
Optical information analyzer（400）It is configured as analyzing the spectral power distribution of the reflected light；
Type identification device（500）It is configured as according in the spectral power distribution, the distribution situation of each frequency range light wave is judged
The car plate（200）Type.
2. the system as claimed in claim 1, it is characterized in that, further include：It is connected to optical information analyzer（400）And optical receiver
（300）Between filter, for filtering out the car plate（200）The reflected light of lateral middle above section.
3. the system as claimed in claim 1, it is characterized in that, further include being set to the optical receiver（300）On, it is used for
Block the car plate（200）The reflected light of lateral middle above section blocks device.
4. system as described in any one of claims 1-3, it is characterized in that, the type identification device（500）, according to the spectrum work(
In rate distribution, whether the distribution accounting of green frequency range light wave reaches preset value, differentiates the car plate（200）For traditional car plate
（200）Or new energy car plate（200）.
5. system as claimed in claim 4, it is characterized in that, the optical information analyzer（400）Including：
Filter circuit exports the light wave of several frequency ranges for the reflected light received to be filtered；
Spectrum analyzer circuit, the spectral power distribution of the light wave for analyzing several frequency ranges.
6. system as claimed in claim 5, it is characterized in that, the filter circuit is：Allow light through several frequency ranges
The filter of light wave corresponding frequency band.
7. system as claimed in claim 6, it is characterized in that, several frequency ranges are：Yellow frequency range, green frequency range and blue frequency
Section.
8. the system as described in claim 5-7 is any, it is characterized in that, the preset value is：Standard new energy car plate（200）
In, in small-sized new-energy automobile number plate or large-scale new-energy automobile number plate, to the light source（100）Reflected light spectral power
In distribution, the smaller value of the distribution accounting of green frequency range light wave；Or subtract preset error amount for the smaller value.
9. system as claimed in claim 8, it is characterized in that, the spectrum analyzer circuit includes：
Light sensor（4021）, the effect of the light wave for receiving several frequency ranges after the filter circuit is filtered；
Current acquisition circuitry connects the light sensor（4021）, the light wave for obtaining several frequency ranges respectively acts on
The light sensor（4021）On induced current；
Power analysis circuitry connects the current acquisition circuitry, for the sense according to the light wave for corresponding to several frequency ranges respectively
Induced current analyzes the spectral power distribution of the light wave of several frequency ranges.
10. system as claimed in claim 9, it is characterized in that, the current acquisition circuitry is：It is series at the light sensor
（4021）Ammeter（4023）；Or to be series at the light sensor（4021）Load（4022）, and described in connection
Load（4022）Power meter（4024）, by obtaining the load（4022）Power, calculate the induced current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721678080.1U CN207816806U (en) | 2017-12-06 | 2017-12-06 | A kind of car plate type compartment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721678080.1U CN207816806U (en) | 2017-12-06 | 2017-12-06 | A kind of car plate type compartment system |
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| CN207816806U true CN207816806U (en) | 2018-09-04 |
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| CN201721678080.1U Expired - Fee Related CN207816806U (en) | 2017-12-06 | 2017-12-06 | A kind of car plate type compartment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111160073A (en) * | 2018-11-08 | 2020-05-15 | 浙江宇视科技有限公司 | License plate type identification method and device and computer readable storage medium |
| CN112791989A (en) * | 2021-03-29 | 2021-05-14 | 常州三点零智能制造有限公司 | Automatic license plate detection method and device |
-
2017
- 2017-12-06 CN CN201721678080.1U patent/CN207816806U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111160073A (en) * | 2018-11-08 | 2020-05-15 | 浙江宇视科技有限公司 | License plate type identification method and device and computer readable storage medium |
| CN111160073B (en) * | 2018-11-08 | 2023-09-19 | 浙江宇视科技有限公司 | License plate type recognition method and device and computer readable storage medium |
| CN112791989A (en) * | 2021-03-29 | 2021-05-14 | 常州三点零智能制造有限公司 | Automatic license plate detection method and device |
| CN112791989B (en) * | 2021-03-29 | 2021-07-13 | 常州三点零智能制造有限公司 | Automatic license plate detection method and device |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190621 Address after: 510000 First Floor of Jiadu Science and Technology Building, No. 4 Jiagong Road, Tianhe District, Guangzhou City, Guangdong Province, self-compiled A131 (office only) Patentee after: Guangzhou Tianzhi Intelligent Science and Technology Co. Ltd. Address before: 610041 16 1, 1 Tianfu Third Street, Chengdu high tech Zone, Sichuan, China 1610 Patentee before: Sichuan Zhi Chuang space incubator management Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 Termination date: 20201206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |