CN216249547U - Accurate license plate shaft recognition device of ETC portal - Google Patents
Accurate license plate shaft recognition device of ETC portal Download PDFInfo
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- CN216249547U CN216249547U CN202122885066.1U CN202122885066U CN216249547U CN 216249547 U CN216249547 U CN 216249547U CN 202122885066 U CN202122885066 U CN 202122885066U CN 216249547 U CN216249547 U CN 216249547U
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Abstract
The utility model relates to an accurate license plate shaft recognition device of ETC portal, it is including shooting the subassembly, it includes the camera part to shoot the subassembly, the camera part includes camera and silica gel piece that generates heat, the silica gel piece that generates heat is fixed in the camera lens department of camera, the silica gel piece that generates heat is fixed around the periphery of the camera lens of camera outward, the silica gel piece that generates heat is coupled with heating circuit, heating circuit is used for detecting ambient temperature and exports executive signal and gets electric with the control silica gel piece that generates heat. This application has when the camera is lower at ambient temperature, can keep the effect of the definition of shooing of camera.
Description
Technical Field
The application relates to the field of traffic monitoring equipment, in particular to an ETC portal accurate license plate axle recognition device.
Background
At present, ETC portal is equipped with the camera that is used for discerning license plate and statistics number of axles, because the camera is used for outdoors, current camera mainly relies on outside safety cover to resist bad weather, nevertheless when outside temperature is located under zero, the easy frost of camera's camera lens is perhaps frozen, and then leads to the camera to shoot the definition of picture lower.
SUMMERY OF THE UTILITY MODEL
In order to keep the definition of shooing of camera when the camera is lower at external temperature, this application provides an accurate license plate shaft recognition device of ETC portal.
The application provides a pair of accurate license plate shaft recognition device of ETC portal adopts following technical scheme:
the utility model provides an accurate license plate arbor wheel recognition device of ETC portal, includes the shooting subassembly, the shooting subassembly includes the camera part, the camera part includes camera and silica gel piece that generates heat, the silica gel piece that generates heat is fixed in the camera lens department of camera, the silica gel piece that generates heat winds outward the periphery of the camera lens of camera is fixed, the silica gel piece that generates heat is coupled with heating circuit, heating circuit is used for detecting ambient temperature and exports execution signal in order to control the silica gel piece that generates heat gets electricity.
By adopting the technical scheme, when the external temperature is higher, the heating circuit does not output an execution signal, and the silica gel heating sheet is not electrified; when ambient temperature is lower, the heating circuit output execution signal control silica gel generates heat the piece and generates heat, and the heat transfer that the silica gel generates heat the piece and produce to the camera lens department of camera, and then the camera lens department temperature of camera risees and prevents that the camera lens department of camera from frosting or freezing to when the temperature is lower, the camera keeps shooting the definition.
Optionally, the heating circuit includes a detection module, a comparison module, a switch module, a processing module and an execution module; the detection module is coupled with the comparison module and is used for detecting the outside temperature and outputting a detection signal; the comparison module is coupled with the switch module, a reference value is arranged in the comparison module, when the received detection signal is greater than the reference value, the comparison module outputs a comparison signal, and when the received detection signal is less than the reference value, the comparison module does not output the comparison signal; the switch module is coupled with the processing module and is used for receiving the comparison signal and outputting a switch signal; the processing module is coupled with the execution module and is used for receiving the switch signal and outputting a processing signal; the execution module is coupled with the silica gel heating sheet, the execution module is used for receiving the processing signal and outputting the execution signal, and the silica gel heating sheet receives the execution signal and then gets electricity.
By adopting the technical scheme, when the detection signal output by the detection module is smaller than the reference value, the comparison module does not output the comparison signal, the switch module does not output the switch signal, the processing module does not output the processing signal, the execution module does not output the execution signal, and further the silica gel heating sheet is not electrified; when the detection signal output by the detection module is larger than the reference value, the comparison module outputs a comparison signal, the switch module outputs a switch signal, the processing module outputs a processing signal, the execution module outputs an execution signal, and the silica gel heating sheet is electrified.
Optionally, the detection module includes a thermistor RT, one end of the thermistor RT is coupled with the power VCC, a fourth resistor R4 is coupled to the other end of the thermistor RT, the other end of the fourth resistor R4 is grounded, and the thermistor RT is coupled with a connection node of the fourth resistor R4 and the comparison module.
By adopting the technical scheme, when the external temperature rises, the resistance value of the thermistor RT is increased, the voltage of a connecting node between the thermistor RT and the fourth resistor R4 is reduced, and the detection signal output by the thermistor RT is reduced; when the external temperature is reduced, the resistance value of the thermistor RT is reduced, the voltage of the connection node between the thermistor RT and the fourth resistor R4 is increased, and the detection signal output by the thermistor RT is increased.
Optionally, the comparison module includes a comparator N1, a first signal input terminal of the comparator N1 is coupled to the thermistor RT, a second signal input terminal of the comparator N1 is used for inputting a reference value, a third resistor R3 is coupled to a second signal input terminal of the comparator N1, a first resistor R1 is coupled to the other terminal of the third resistor R3, the other terminal of the first resistor R1 is coupled to a power source VCC, a second resistor R2 is coupled to a connection node between the first resistor R1 and the third resistor R3, the other terminal of the second resistor R2 is grounded, and a voltage at a connection node between the first resistor R1 and the second resistor R2 is the reference value; a signal output of the comparator N1 is coupled to the switch module to output a comparison signal.
By adopting the technical scheme, when the detection signal input by the first signal input end of the comparator N1 is smaller than the reference value, no comparison signal is output by the signal output end of the comparator N1, and when the detection signal input by the comparator N1 is larger than the reference value, the comparison signal is output by the signal output end of the comparator N1.
Optionally, the switch module includes a first transistor Q1, a base of the first transistor Q1 is coupled to the comparator N1, an emitter of the first transistor Q1 is grounded, a collector of the first transistor Q1 is coupled to a first relay KM1, a coil of the first relay KM1 is coupled to the first transistor Q1, another end of the coil of the first relay KM1 is coupled to a power source VCC, the first relay KM1 includes a first normally open contact switch KM1-1, one end of the first normally open contact switch KM1-1 is grounded, and another end of the first normally open contact switch KM1-1 is coupled to the processing module to output a switching signal.
By adopting the technical scheme, when the base electrode of the first triode Q1 does not receive the comparison signal, the collector electrode and the emitter electrode of the first triode Q1 are kept cut off, the coil of the first relay KM1 is not electrified, the first normally open contact switch KM1-1 is kept disconnected, and no switching signal is output; when the base of the first triode Q1 receives the comparison signal, the collector and the emitter of the first triode Q1 are conducted, the coil of the first relay KM1 is electrified, the first normally open contact switch KM1-1 is closed, and a switching signal is output.
Optionally, the processing module includes a chip U1, the chip U1 includes eight pins, the first pin of the chip U1 is grounded, the fifth pin of the chip U1 is coupled with a second capacitor C2, the other end of the second capacitor C2 is coupled with the first pin of the chip U1, one end of the second capacitor C2 away from the chip U1 is simultaneously coupled with the first normally-open contact switch KM1-1, the other end of the first normally-open contact switch KM1-1 is coupled with the second pin of the chip U1, the sixth pin of the chip U1 is coupled with the second pin of the chip U1, the sixth pin of the chip U1 is simultaneously coupled with a fifth resistor R5, the other end of the fifth resistor R5 is coupled with the fourth pin of the chip U1, the eighth pin of the chip U1 is coupled with the fourth pin of the chip U1, the eighth pin of the chip U1 is coupled with the power supply VCC pin, the third pin of the chip U1 is coupled to an execution module to output a processed signal.
By adopting the technical scheme, when the first normally open contact switch KM1-1 is kept to be switched off, the second pin and the sixth pin of the chip U1 are kept at a high level, the third pin of the chip U1 is kept at a low level, and no processing signal is output from the third pin of the chip U1; when the first normally-open contact switch KM1-1 is closed, the second pin and the sixth pin of the chip U1 are kept at a low level, the third pin of the chip U1 outputs a high level, and the third pin of the chip U1 outputs a processing signal.
Optionally, the camera shooting component further comprises a protection cover, a sun shade and a solar panel, the top of the camera is fixedly connected with the protection cover, the sun shade is located at the top of the protection cover, and the solar panel is fixed at the top of the sun shade; the camera is inside to be equipped with and to shoot module and battery module, battery module's input is used for being coupled with the commercial power, battery module's input is coupled with solar panel through the cable simultaneously.
Through adopting above-mentioned technical scheme, solar panel utilizes photoelectric effect, converts solar radiation into the electric energy, and the retransmission is stored to battery module, and then saves the electric power resource.
Optionally, an arrester is coupled to an input end of the battery module.
Through adopting above-mentioned technical scheme, when the camera is used for outdoor, the lightning arrester can prevent that the circuit of camera from suffering the thunderbolt, and then increases the life of camera.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the external temperature is higher, the heating circuit does not output an execution signal, and the silica gel heating sheet is not powered; when the external temperature is low, the heating circuit outputs an execution signal to control the silica gel heating sheet to heat, the heat generated by the silica gel heating sheet is transferred to the lens of the camera, and then the temperature of the lens of the camera is raised to prevent the lens of the camera from frosting or freezing, so that the camera keeps shooting definition when the temperature is low;
2. when the detection signal output by the detection module is smaller than the reference value, the comparison module does not output the comparison signal, the switch module does not output the switch signal, the processing module does not output the processing signal, the execution module does not output the execution signal, and then the silica gel heating sheet is not powered on; when the detection signal output by the detection module is larger than the reference value, the comparison module outputs a comparison signal, the switch module outputs a switch signal, the processing module outputs a processing signal, the execution module outputs an execution signal, and the silica gel heating sheet is electrified;
3. when the external temperature rises, the resistance value of the thermistor RT is increased, the voltage of a connecting node between the thermistor RT and the fourth resistor R4 is reduced, and a detection signal output by the thermistor RT is reduced; when the external temperature is reduced, the resistance value of the thermistor RT is reduced, the voltage of the connection node between the thermistor RT and the fourth resistor R4 is increased, and the detection signal output by the thermistor RT is increased.
Drawings
Fig. 1 is an overall structure diagram of an accurate license plate wheel axle recognition device of ETC portal in the embodiment of the application.
Fig. 2 is an enlarged view of a in fig. 1 of an ETC portal accurate license plate axle recognition device according to an embodiment of the present application.
Fig. 3 is an explosion diagram of a camera shooting component in the ETC portal accurate license plate axle recognition device according to the embodiment of the application.
Fig. 4 is a circuit diagram of a heating circuit in the accurate license plate axle recognition device of the ETC portal according to the embodiment of the application.
Description of reference numerals: 1. an ETC portal; 2. a first lane of traffic; 3. a second lane of traffic; 4. an emergency lane; 11. a solar panel; 12. a sun shade; 13. a protective cover; 14. a silica gel heating sheet; 15. a universal joint; 16. a camera; 17. a light supplement lamp; 111. a screw; 112. a gasket; 113. a cushion column; 161. a detection module; 162. a comparison module; 163. a switch module; 164. a processing module; 165. and executing the module.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses accurate license plate shaft recognition device of ETC portal.
Referring to fig. 1, the ETC portal accurate license plate axle recognition device comprises an ETC portal 1 and three sets of shooting assemblies; the ETC portal frame 1 is used for being installed on two sides of a lane, the lane comprises a first traffic lane 2, a second traffic lane 3 and an emergency traffic lane 4, the shooting assemblies are fixed on the ETC portal frame 1, two sets of shooting assemblies are installed above the second traffic lane 3, one set of shooting assembly is installed above the emergency traffic lane 4, three sets of shooting assemblies are arranged in an inclined mode, the two sets of shooting assemblies above the second traffic lane 3 are respectively inclined towards the first traffic lane 2 and the emergency traffic lane 4 to be used for shooting the first traffic lane 2 and the emergency traffic lane 4, and the shooting assembly above the emergency traffic lane 4 is inclined towards the second traffic lane to be used for shooting the second traffic lane 3;
referring to fig. 2 and 3, the shooting assembly includes a shooting component and a light supplement lamp 17, the bottom of the shooting component and the bottom of the light supplement lamp 17 are both fixed on the ETC portal 1 through a universal joint 15, the universal joint 15 is used for adjusting the shooting direction and the light supplement direction of a camera 16, the shooting component includes a camera 16, a protective cover 13, a sunshade 12 and a solar panel 11, the top of the camera 16 is fixedly connected with the protective cover 13, the length direction of the protective cover 13 is parallel to the length direction of the camera 16, two pad columns 113 are respectively fixed at two ends of the top of the protective cover 13, the pad columns 113 are arranged in the inner portion of the pad columns 113, the sunshade 12 is located at the top of the protective cover 13, the sunshade 12 is provided with a first round hole and a second round hole, the pad columns 113 at two ends of the sunshade 12 penetrate through the sunshade 12 through the first round hole and the second round hole, a gasket 112 is penetrated at one end of the pad columns 113 far away from the protective cover 13, a screw 111 penetrates through the gasket 112 and the sunshade 12 and is in threaded connection with the pad columns 113, thereby fixing the sunshade 12; the top of the sunshade 12 is fixed with a solar panel 11;
a shooting module (not shown in the figure) and a battery module (not shown in the figure) are arranged inside the camera 16, the input end of the battery module is used for being coupled with mains supply, the input end of the battery module is simultaneously coupled with the solar panel 11 through a cable, the input end of the battery module is coupled with a lightning arrester (not shown in the figure), the output end of the battery module is coupled with the shooting module through a cable, the shooting module is used for converting shot image information into a trigger signal, the output end of the shooting module is coupled with a light supplement lamp 17 through a cable, the input end of the light supplement lamp 17 comprises a power input end (not shown in the figure) and a trigger signal input end (not shown in the figure), a plastic partition plate (not shown in the figure) is arranged between the power input end and the trigger signal input end, and the plastic partition plate is used for preventing the power input end from being contacted with the trigger signal input end; the power supply input end is used for being coupled with commercial power, meanwhile, the power supply input end is coupled with a lightning arrester, the trigger signal input end is coupled with the shooting module through a cable to receive shooting signals, after the shooting module shoots a vehicle, the shooting module outputs trigger signals to the light supplement lamp 17, and the light supplement lamp 17 is powered on when receiving the trigger signals; the outside of the cable is sleeved with a hose (not shown in the figure) which is used for protecting the cable.
Referring to fig. 2, a lens of the camera 16 is fixed with a silica gel heating plate 14, the silica gel heating plate 14 is fixed at the periphery of the lens of the camera 16, the silica gel heating plate 14 is used for increasing the temperature of the lens of the camera 16 to defrost or snow, the silica gel heating plate 14 is coupled with a heating circuit, and the heating circuit is used for detecting the external temperature and outputting an execution signal to control the silica gel heating plate 14 to be powered on.
Referring to fig. 4, the heat generation circuit includes a detection module 161, a comparison module 162, a switching module 163, a processing module 164, and an execution module 165; the detection module 161 is configured to detect an external temperature and output a detection signal, the detection module 161 includes a thermistor RT, one end of the thermistor RT is coupled to the power VCC, the other end of the thermistor RT is coupled to the fourth resistor R4, the other end of the fourth resistor R4 is grounded, and a connection node between the thermistor RT and the fourth resistor R4 is coupled to the comparison module 162;
a reference value is set inside the comparison module 162, the comparison module 162 is configured to output a comparison signal when the input detection signal is greater than the reference value, the comparison module 162 includes a comparator N1, a first signal input terminal of the comparator N1 is a positive phase input terminal, a first signal input terminal of the comparator N1 is coupled to a connection node between the thermistor RT and the fourth resistor R4, a second signal input terminal of the comparator N1 is a negative phase input terminal, a second signal input terminal of the comparator N1 is coupled to a third resistor R3, the other end of the third resistor R3 is coupled to a first resistor R1, the other end of the first resistor R1 is coupled to the power source VCC, a connection node between the third resistor R3 and the first resistor R1 is coupled to the second resistor R2, the other end of the second resistor R2 is grounded, and a connection node between the first resistor R1 and the second resistor R2 is the reference value input by the comparator N1; a signal output of the comparator N1 is coupled to the switch module 163 to output a comparison signal;
the switch module 163 is configured to output a switch signal when receiving the comparison signal, the switch module 163 includes a first triode Q1, the first triode Q1 is an NPN triode, a base of the first triode Q1 is coupled to a signal output end of the comparator N1, an emitter of the first triode Q1 is grounded, a collector of the first triode Q1 is coupled to a first relay KM1, a coil of the first relay KM1 is coupled to a collector of the first triode Q1, the other end of the coil of the first relay KM1 is coupled to a power source VCC, the first relay KM1 includes a first normally open contact switch KM1-1, one end of the first normally open contact switch KM1-1 is grounded, and the other end of the first normally open contact switch KM1-1 is coupled to the processing module 164 to output the switch signal;
the processing module 164 is configured to receive the switching signal and output a processing signal, the processing module 164 includes a chip U1 with a model NE555, the chip U1 includes eight pins, a first pin of the chip U1 is grounded, a fifth pin of the chip U1 is coupled with a second capacitor C2, the other end of the second capacitor C2 is coupled with the first pin of the chip U1, one end of the second capacitor C2 away from the chip U1 is coupled with the first normally-open contact switch KM1-1, the other end of the first normally-open contact switch KM1-1 is coupled with the second pin of the chip U1, a sixth pin of the chip U1 is coupled with the second pin of the chip U1, a sixth pin of the chip U1 is coupled with a fifth resistor R5, the other end of the fifth resistor R5 is coupled with the fourth pin of the chip U1, the eighth pin of the chip U1 is coupled with the fourth pin of the chip U365, the eighth pin of the chip U1 is coupled with the VCC power supply, and the third pin of the chip U58165 is coupled with the processing module to output a signal processing module;
the execution module 165 is configured to receive the processing signal and output an execution signal, the execution module 165 includes a second triode Q2, the second triode Q2 is an NPN triode, a base of the second triode Q2 is coupled to a third pin of the chip U1, a collector of the second triode Q2 is coupled to an eighth pin of the chip U1, an emitter of the second triode is coupled to a second relay KM2, a coil of the second relay KM2 is coupled to an emitter of the second relay KM2, the other end of the coil of the second relay KM2 is grounded, the second relay KM2 includes a second normally-open contact switch KM2-1, one end of the second normally-open contact switch KM2-1 is coupled to a power source VCC, the other end of the second normally-open contact switch KM2-1 is coupled to the silicone heater 14, and the other end of the silicone heater 14 is grounded.
The implementation principle of the accurate license plate wheel axle recognition device of ETC portal of the embodiment of this application is: when the external temperature is lower, the thermistor RT detects that the external temperature is reduced, the output detection signal is increased, the detection signal is larger than a reference value, the signal output end of the comparator N1 outputs a comparison signal, the collector of the first triode Q1 is conducted with the emitter, the coil of the first relay KM1 is electrified, the first normally-open contact switch KM1-1 is closed and outputs a switch signal, the second pin and the sixth pin of the chip U1 become low levels, the third pin of the chip U1 outputs high levels, the collector of the second triode Q2 is conducted with the emitter, the coil of the second relay KM2 is electrified, the second relay KM2 controls the second normally-open contact switch KM2-1 to be closed, and the silica gel heating sheet 14 is electrified and heated.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides an accurate license plate shaft recognition device of ETC portal, its characterized in that: including shooting the subassembly, it includes the camera part to shoot the subassembly, the camera part includes camera (16) and silica gel heating plate (14), silica gel heating plate (14) are fixed in the camera lens department of camera (16), silica gel heating plate (14) winds outward the periphery of the camera lens of camera (16) is fixed, heating circuit is coupled to silica gel heating plate (14), heating circuit is used for detecting ambient temperature and output execution signal in order to control silica gel heating plate (14) gets electricity.
2. The accurate license plate shaft recognition device of ETC portal according to claim 1, characterized in that: the heating circuit comprises a detection module (161), a comparison module (162), a switch module (163), a processing module (164) and an execution module (165); the detection module (161) is coupled with the comparison module (162), and the detection module (161) is used for detecting the outside temperature and outputting a detection signal; the comparison module (162) is coupled to the switch module (163), a reference value is set inside the comparison module (162), when the received detection signal is greater than the reference value, the comparison module (162) outputs a comparison signal, and when the received detection signal is less than the reference value, the comparison module (162) does not output the comparison signal; the switch module (163) is coupled with the processing module (164), and the switch module (163) is used for receiving the comparison signal and outputting a switch signal; the processing module (164) is coupled with the execution module (165), and the processing module (164) is used for receiving the switching signal and outputting a processing signal; execution module (165) with silica gel heating sheet (14) are coupled, execution module (165) are used for receiving processing signal and output execution signal, silica gel heating sheet (14) receive behind the execution signal and get electric.
3. The accurate license plate shaft recognition device of ETC portal according to claim 2, characterized in that: the detection module (161) comprises a thermistor RT, one end of the thermistor RT is coupled with a power supply VCC, a fourth resistor R4 is coupled to the other end of the thermistor RT, the other end of the fourth resistor R4 is grounded, and the thermistor RT is coupled with a connection node of the fourth resistor R4 and the comparison module (162).
4. The accurate license plate shaft recognition device of ETC portal according to claim 3, characterized in that: the comparison module (162) comprises a comparator N1, a first signal input end of the comparator N1 is coupled with the thermistor RT, a second signal input end of the comparator N1 is used for inputting a reference value, a second signal input end of the comparator N1 is coupled with a third resistor R3, the other end of the third resistor R3 is coupled with a first resistor R1, the other end of the first resistor R1 is coupled with a power supply VCC, a connection node of the first resistor R1 and the third resistor R3 is coupled with a second resistor R2, the other end of the second resistor R2 is grounded, and the voltage of the connection node of the first resistor R1 and the second resistor R2 is the reference value; a signal output of the comparator N1 is coupled to the switch module 163 to output a comparison signal.
5. The accurate license plate shaft recognition device of ETC portal according to claim 4, characterized in that: the switch module (163) comprises a first transistor Q1, a base of the first transistor Q1 is coupled with the comparator N1, an emitter of the first transistor Q1 is grounded, a collector of the first transistor Q1 is coupled with a first relay KM1, a coil of the first relay KM1 is coupled with the first transistor Q1, the other end of the coil of the first relay KM1 is coupled with a power source VCC, the first relay KM1 comprises a first normally open contact switch KM1-1, one end of the first normally open contact switch KM1-1 is grounded, and the other end of the first normally open contact switch KM1-1 is coupled with the processing module (164) to output a switch signal.
6. The accurate license plate shaft recognition device of ETC portal according to claim 5, characterized in that: the processing module (164) comprises a chip U1, the chip U1 comprises eight pins, the first pin of the chip U1 is grounded, the fifth pin of the chip U1 is coupled with a second capacitor C2, the other end of the second capacitor C2 is coupled with the first pin of the chip U1, one end of the second capacitor C2 far away from the chip U1 is coupled with the first normally open contact switch KM1-1, the other end of the first normally open contact switch KM1-1 is coupled with the second pin of the chip U1, the sixth pin of the chip U1 is coupled with the second pin of the chip U1, the sixth pin of the chip U1 is coupled with a fifth resistor R5, the other end of the fifth resistor R5 is coupled with the fourth pin of the chip U1, the eighth pin of the chip U1 is coupled with the fourth pin of the chip U1, the eighth pin of the chip U1 is coupled with the VCC, the third pin of the chip U1 is coupled to the execution module 165 to output a processed signal.
7. The accurate license plate shaft recognition device of ETC portal according to claim 1, characterized in that: the camera shooting component further comprises a protective cover (13), a sunshade (12) and a solar panel (11), the top of the camera (16) is fixedly connected with the protective cover (13), the sunshade (12) is located at the top of the protective cover (13), and the solar panel (11) is fixed at the top of the sunshade (12); camera (16) inside shooting module and the battery module of being equipped with, battery module's input is used for coupling with the commercial power, battery module's input is coupled with solar panel (11) through the cable simultaneously.
8. The accurate license plate shaft recognition device of ETC portal according to claim 7, characterized in that: an arrester is coupled to an input end of the battery module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122885066.1U CN216249547U (en) | 2021-11-23 | 2021-11-23 | Accurate license plate shaft recognition device of ETC portal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122885066.1U CN216249547U (en) | 2021-11-23 | 2021-11-23 | Accurate license plate shaft recognition device of ETC portal |
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| Publication Number | Publication Date |
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| CN216249547U true CN216249547U (en) | 2022-04-08 |
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| CN202122885066.1U Active CN216249547U (en) | 2021-11-23 | 2021-11-23 | Accurate license plate shaft recognition device of ETC portal |
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