CN207231498U - The positioner and roadside unit of vehicle carried electronic label - Google Patents
The positioner and roadside unit of vehicle carried electronic label Download PDFInfo
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- CN207231498U CN207231498U CN201720637754.7U CN201720637754U CN207231498U CN 207231498 U CN207231498 U CN 207231498U CN 201720637754 U CN201720637754 U CN 201720637754U CN 207231498 U CN207231498 U CN 207231498U
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- vehicle carried
- electronic label
- carried electronic
- positioning result
- deviations
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Abstract
The utility model provides a kind of positioner and roadside unit of vehicle carried electronic label.Wherein, positioner includes：Phased array antenna, signal processing unit, FPGA processing units and DSP operation unit；Phased array antenna is connected with signal processing unit and FPGA processing units respectively, and signal processing unit is connected with FPGA processing units and DSP operation unit respectively, and FPGA processing units are connected with DSP operation unit；FPGA processing units, for obtaining the first positioning result of vehicle carried electronic label by beam scanning location algorithm；DSP operation unit, for obtaining the second positioning result of vehicle carried electronic label by ultrahigh resolution location algorithm based on MUSIC algorithms, and determines according to the first positioning result and the second positioning result the position of vehicle carried electronic label.The positioner of vehicle carried electronic label provided by the utility model, improves the positioning accuracy of vehicle carried electronic label.
Description
Technical field
It the utility model is related to technical field of intelligent traffic, more particularly to a kind of positioner of vehicle carried electronic label and road
Side unit.
Background technology
In order to save the time that vehicle pays high speed travelling expenses, freeway toll station passes through no-stop charging system
(Electronic Toll Collection, ETC) realizes non-parking charge.ETC system includes the car being arranged on vehicle
Carry electronic tag (On board Unit, OBU) and be arranged on the roadside unit (Road Side Unit, RSU) of charge station.When
When vehicle is by expressway charge station, roadside unit can be by the vehicle carried electronic label on vehicle, automatically from vehicle electronics mark
Sign and high speed travelling expenses are deducted on the Payment Card that can be read, so as to fulfill non-parking charge.
With the development of urbanization, the vehicle flowrate in ETC tracks is continuously increased, in the very big website of some vehicle flowrates,
There is the application model of multilane in the same direction., can be in this track when an ETC vehicle drives into a wherein ETC track
ETC vehicles in other ETC vehicles and adjacent ETC tracks interfere, i.e., with car interference or monkey chatter.At this time, such as
Fruit roadside unit cannot accurately distinguish the position of each ETC vehicles, will result in misplace and go or repeat problem of deducting fees.Such as：
Two ETC vehicles positioned at two neighboring track, if the position of ETC vehicles in this track is positioned in another track
On, then high speed travelling expenses may be deducted from the Payment Card that the vehicle carried electronic label of this track ETC vehicles can be read, but by another
ETC vehicles on track misplace row.And the ETC vehicles in this track will repeat to deduct fees when current.
As it can be seen that the interests of ETC vehicle car owners are seriously affected with car interference or monkey chatter problem, therefore, such as
The position that ETC vehicles are accurately positioned in what is urgently to be resolved hurrily.
Utility model content
The utility model provides a kind of positioner and roadside unit of vehicle carried electronic label, improves vehicle carried electronic label
Positioning accuracy.
The positioner of vehicle carried electronic label provided by the utility model, including：Phased array antenna, signal processing unit,
FPGA processing units and DSP operation unit；
The phased array antenna is connected with the signal processing unit and the FPGA processing units respectively, at the signal
Reason unit is connected with the FPGA processing units and the DSP operation unit respectively, and the FPGA processing units are transported with the DSP
Calculate unit connection；
The phased array antenna, for receiving the radiofrequency signal of vehicle carried electronic label transmission；
The signal processing unit, for the radiofrequency signal to be converted to digital signal；
The FPGA processing units, it is described vehicle-mounted for being obtained according to the digital signal by beam scanning location algorithm
First positioning result of electronic tag；
The DSP operation unit, for being positioned according to the digital signal by the ultrahigh resolution based on MUSIC algorithms
Algorithm obtains the second positioning result of the vehicle carried electronic label, and is tied according to first positioning result and second positioning
Fruit determines the position of the vehicle carried electronic label.
Optionally, the DSP operation unit is specifically used for：
The deviations of the vehicle carried electronic label are obtained according to first positioning result and second positioning result；
If the deviations are located in the range of predetermined deviation, by the position of first positioning result instruction or institute
State position of the position of the second positioning result instruction as the vehicle carried electronic label.
Optionally, first positioning result be the vehicle carried electronic label the first coordinate value (X1, Y1), described second
Positioning result is the second coordinate value (X2, Y2) of the vehicle carried electronic label.
Optionally, the deviations include：The first deviation in X-direction | X1-X2 | and the second deviation in Y-direction |
Y1-Y2|；
The deviations are located in the range of predetermined deviation, including：
First deviation is less than the first predetermined threshold value, and second deviation is less than the second predetermined threshold value.
Optionally, the deviations are the distance between first coordinate value and second coordinate value.
Optionally, first positioning result be the radiofrequency signal the first direction of arrival, second positioning result
For the second direction of arrival of the radiofrequency signal；The deviations are first direction of arrival and second direction of arrival
Difference.
Roadside unit provided by the utility model, including the vehicle carried electronic label of the utility model any embodiment offer
Positioner.
The utility model provides a kind of positioner and roadside unit of vehicle carried electronic label.Car provided by the utility model
The positioner of electronic tag is carried, FPGA processing units obtain vehicle electronics according to digital signal by beam scanning location algorithm
First positioning result of label, DSP operation unit are used to pass through the super-resolution calibration based on MUSIC algorithms according to digital signal
Position algorithm obtains the second positioning result of vehicle carried electronic label.FPGA beam scannings positioning is positioned into phase with DSP ultrahigh resolutions
Fusion, effectively increases the antijamming capability of phased array antenna, improves the positional accuracy of vehicle carried electronic label.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram of the positioner for the vehicle carried electronic label that the utility model embodiment provides；
Fig. 2 is the flow chart of the localization method for the vehicle carried electronic label that the utility model embodiment provides.
Description of reference numerals：
11：Phased array antenna； 12：Signal processing unit；
13：FPGA processing units； 14：DSP operation unit.
Embodiment
It is new below in conjunction with this practicality to make 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 part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, those of ordinary skill in the art's all other embodiments obtained without making creative work, belongs to
The scope of the utility model protection.
Fig. 1 is the structure diagram of the positioner for the vehicle carried electronic label that the utility model embodiment provides.Such as Fig. 1 institutes
Show, the positioner of vehicle carried electronic label provided in this embodiment, can include：Phased array antenna 11, signal processing unit 12,
Field programmable gate array (Field-Programmable Gate Array, FPGA) processing unit 13 and Digital Signal Processing
(Digital Signal Processing, DSP) arithmetic element 14.
Phased array antenna 11 is connected with signal processing unit 12 and FPGA processing units 13 respectively, and signal processing unit 12 divides
It is not connected with FPGA processing units 13 and DSP operation unit 14, FPGA processing units 13 are connected with DSP operation unit 14.
Phased array antenna 11, for receiving the radiofrequency signal of vehicle carried electronic label transmission.
Signal processing unit 12, for radiofrequency signal to be converted to digital signal.
FPGA processing units 13, for obtaining vehicle carried electronic label by beam scanning location algorithm according to digital signal
First positioning result.
DSP operation unit 14, for being passed through according to digital signal based on Multiple Signal Classification (multiple signal
Classification, MUSIC) algorithm ultrahigh resolution location algorithm obtain vehicle carried electronic label the second positioning result,
And the position of vehicle carried electronic label is determined according to the first positioning result and the second positioning result.
The positioner of vehicle carried electronic label provided in this embodiment, in structure, including at phased array antenna 11, signal
Manage unit 12, FPGA processing units 13 and DSP operation unit 14.Phased array antenna 11 is list can be radiated in antenna by controlling
The current feed phase of member changes the antenna of pattern shapes.In the present embodiment, each radiating element in phased array antenna 11
Current feed phase can be controlled by FPGA processing units 13.Phased array antenna 11 forms certain covering model in ETC tracks region
Enclose.Coverage can according to the difference of phased array antenna 11, ETC tracks region it is different and different.Such as：Cover model
2.5~4 meters of road width direction, 0~10 meter of road travel direction can be included by enclosing.FPGA processing units 13 can be to include
The peripheral circuit of fpga chip.DSP operation unit 14 can be the peripheral circuit for including dsp chip.
The positioner of vehicle carried electronic label provided in this embodiment, realizes that the principle of vehicle location is as follows：
After ETC vehicles drive into ETC tracks region, the vehicle carried electronic label on ETC vehicles will send radiofrequency signal, radio frequency letter
The mark of vehicle carried electronic label can be carried in number, which can uniquely distinguish different vehicle carried electronic labels.It is to be appreciated that
The present embodiment is not limited for the other information carried in radiofrequency signal.Correspondingly, phased array antenna 11 receives vehicle electronics
The radiofrequency signal that label is sent, and radiofrequency signal is sent to signal processing unit 12.Signal processing unit 12 can be to radio frequency
Signal carries out the processing such as local oscillator, mixing, filtering, radiofrequency signal is converted to digital signal, and digital signal is sent to FPGA
Processing unit 13 and DSP operation unit 14.FPGA processing units 13 are obtained according to digital signal by beam scanning location algorithm
First positioning result of vehicle carried electronic label, and the first positioning result is sent to DSP operation unit 14.First positioning result refers to
The position of the vehicle carried electronic label obtained by beam scanning location algorithm is shown.DSP operation unit 14, for being believed according to numeral
The second positioning result of vehicle carried electronic label number is obtained by ultrahigh resolution location algorithm based on MUSIC algorithms.Second is fixed
Position result indicates the position of the vehicle carried electronic label obtained by the ultrahigh resolution location algorithm based on MUSIC algorithms.By
In two positioning results that vehicle carried electronic label is obtained by two kinds of algorithms, therefore, DSP operation unit 14 can be according to first
Positioning result and the second positioning result finally determine the position of vehicle carried electronic label.
As it can be seen that the positioner of vehicle carried electronic label provided in this embodiment, on the one hand realizes beam scanning using FPGA
Positioning, on the other hand realizes that the ultrahigh resolution based on MUSIC positions using the high operational capability of DSP.Signal relatively stablize,
When interference is smaller, the positioning result of the ultrahigh resolution positioning of FPGA beam scannings positioning and DSP based on MUSIC should basic one
Cause, two kinds of technologies can be mutually authenticated, and can preferably improve positioning accuracy.And when jitter, interference are larger, FPGA
Beam scanning positions and the inconsistency of the positioning result of ultrahigh resolution positioning of the DSP based on MUSIC will increase, and passes through first
Positioning result and the second positioning result can determine that this can not accurately determine the position of vehicle carried electronic label.Therefore, this implementation
The positioner for the vehicle carried electronic label that example provides, FPGA beam scannings positioning and the positioning of DSP ultrahigh resolutions are blended, had
Effect improves the antijamming capability of phased array antenna, improves the positional accuracy of vehicle carried electronic label.
It should be noted that the positioner of vehicle carried electronic label provided in this embodiment, is sent with an ETC vehicle
Radiofrequency signal is illustrative.In actual scene, there may be multiple ETC vehicles in the region of ETC tracks.In same a period of time
Between, multiple ETC vehicles may send radiofrequency signal at the same time.Correspondingly, phased array antenna 11 can be from each side in the same time
To the radiofrequency signal for receiving multiple ETC vehicles transmissions.Since the mark of vehicle carried electronic label can be carried in radiofrequency signal, the mark
Different vehicle carried electronic labels can uniquely be distinguished.Therefore, after FPGA processing units 13 handle digital signal, can obtain
Obtain the mark of multiple vehicle carried electronic labels and the first positioning result corresponding with each mark.DSP operation unit 14 is to numeral
After signal is handled, the mark of multiple vehicle carried electronic labels and the second positioning knot corresponding with each mark can be obtained
Fruit.For the mark of same vehicle carried electronic label, DSP operation unit 14 can be according to corresponding with the vehicle carried electronic label
One positioning result and the second positioning result finally determine the position of the vehicle carried electronic label.
It should be noted that the present embodiment is not specially limited for type, the model of phased array antenna 11, can basis
Need to be configured.
It should be noted that the present embodiment is not limited for the implementation of FPGA processing units 13, DSP operation unit 14
It is fixed.The type and type for the dsp chip that fpga chip, the DSP operation unit 14 included for FPGA processing units 13 includes
Number do not limit, be configured as needed.
It should be noted that radiofrequency signal is converted to the realization of digital signal for signal processing unit 12 by the present embodiment
Mode does not limit, and can use any one existing signal transfer algorithm.
It should be noted that the present embodiment is not limited for the implementation of beam scanning location algorithm, can use
Any one existing beam scanning location algorithm.Beam scanning location algorithm is based on beam scanning theory, passes through antenna beam
Azimuth scan overlay area, so that it is determined that position of the target in overlay area.As an example, beam scanning location algorithm
Can be：FPGA processing units 13 set the corresponding direction coefficient of different directions for each a period of time in phased array antenna 11 in advance.
FPGA processing units 13 do inner product operation according to digital signal and the default direction coefficient of all directions, and the direction of inner product minimum is
Work as front direction for vehicle carried electronic label, it is hereby achieved that the first positioning result, realizes positioning.
It should be noted that implementation of the present embodiment for the ultrahigh resolution location algorithm based on MUSIC algorithms
Do not limit, any one existing ultrahigh resolution location algorithm based on MUSIC algorithms can be used.Wherein, MUSIC is calculated
Method is a kind of method based on matrix character spatial decomposition.Said from geometric angle, the observation space of signal processing can be decomposed into
Signal subspace and noise subspace, it is clear that the two spaces are orthogonal.Signal subspace by array received to data assist
Feature vector composition corresponding with signal in variance matrix, noise subspace is then by all minimal eigenvalues in covariance matrix
(noise variance) corresponding feature vector composition.As an example, the ultrahigh resolution location algorithm based on MUSIC algorithms can
Think：FPGA processing units 13 carry out covariance computing to digital signal, reconstruct Toeplitz matrixes.DSP operation unit 14 is right
Toeplitz matrixes carry out Eigenvalues Decomposition, by spectrum peak search algorithm construction signal subspace and noise subspace, ensure
In the case of being influenced from signal correlation, correct estimation is made to signal subspace and noise subspace, estimates direction of arrival,
The second positioning result is obtained, realizes positioning.
Optionally, DSP operation unit 14 can be specifically used for：
The deviations of vehicle carried electronic label are obtained according to the first positioning result and the second positioning result.
If deviations are located in the range of predetermined deviation, the position of the first positioning result instruction or the second positioning are tied
Position of the position of fruit instruction as vehicle carried electronic label.
Specifically, the deviations of the vehicle carried electronic label obtained according to the first positioning result and the second positioning result, can
To reflect the inconsistent of the positioning result positioned by FPGA beam scannings positioning with ultrahigh resolutions of the DSP based on MUSIC
Degree.If deviations are located in the range of predetermined deviation, illustrate that the positioning result of two kinds of technologies is basically identical, at this time, signal
Stabilization, interference are smaller relatively, and positioning result is accurate.Therefore, the position that the first positioning result can be indicated or the second positioning
As a result position of the position indicated as vehicle carried electronic label, improves the positional accuracy of ETC vehicles.
It should be noted that the present embodiment is not limited for predetermined deviation scope, can be according to the specific of deviations
Implementation is configured.
Optionally, the first positioning result can be the first coordinate value (X1, Y1) of vehicle carried electronic label, the second positioning result
For the second coordinate value (X2, Y2) of vehicle carried electronic label.
Optionally, can include as the first implementation, deviations：The first deviation in X-direction | X1-X2 | and
The second deviation in Y-direction | Y1-Y2 |.
Correspondingly, deviations are located in the range of predetermined deviation, can include：
First deviation is less than the first predetermined threshold value, and the second deviation is less than the second predetermined threshold value.
Wherein, the present embodiment is not limited for the first predetermined threshold value, the specific value of the second predetermined threshold value, can basis
Need to be configured.
Optionally, can be between the first coordinate value and the second coordinate value as second of implementation, deviations
Distance.
Optionally, the first positioning result can be the first direction of arrival of radiofrequency signal, and the second positioning result is believed for radio frequency
Number the second direction of arrival.Deviations are the difference of the first direction of arrival and the second direction of arrival.
Wherein, direction of arrival (Direction of arrival, DOA) refers to that spacing wave reaches the direction of bay
Angle, abbreviation direction of arrival.
The present embodiment provides a kind of positioner of vehicle carried electronic label, including phased array antenna, signal processing unit,
FPGA processing units and DSP operation unit.The positioner of vehicle carried electronic label provided in this embodiment, FPGA processing unit roots
The first positioning result of vehicle carried electronic label is obtained by beam scanning location algorithm according to digital signal, DSP operation unit is used for
The second positioning that vehicle carried electronic label is obtained by the ultrahigh resolution location algorithm based on MUSIC algorithms according to digital signal is tied
Fruit.FPGA beam scannings positioning and the positioning of DSP ultrahigh resolutions are blended, effectively increase the anti-interference energy of phased array antenna
Power, improves the positional accuracy of vehicle carried electronic label.
The utility model embodiment also provides a kind of roadside unit, including the vehicle electronics mark that embodiment illustrated in fig. 1 provides
The positioner of label.
Wherein, the technical principle of the positioner of vehicle carried electronic label and technique effect are similar with embodiment illustrated in fig. 1, this
Place repeats no more.
Fig. 2 is the flow chart of the localization method for the vehicle carried electronic label that the utility model embodiment provides.The present embodiment carries
The localization method of the vehicle carried electronic label of confession, executive agent can be determining for the vehicle carried electronic label that embodiment illustrated in fig. 1 provides
Position device.As shown in Fig. 2, the localization method of vehicle carried electronic label provided in this embodiment, can include：
S101, receive the radiofrequency signal that vehicle carried electronic label is sent.
S102, by radiofrequency signal be converted to digital signal.
S103, the first positioning result according to digital signal by beam scanning location algorithm acquisition vehicle carried electronic label.
S104, according to digital signal obtain vehicle carried electronic label by ultrahigh resolution location algorithm based on MUSIC
Second positioning result.
S105, the position for determining according to the first positioning result and the second positioning result vehicle carried electronic label.
Optionally, S105, determine according to the first positioning result and the second positioning result the position of vehicle carried electronic label, can be with
Including：
The deviations of vehicle carried electronic label are obtained according to the first positioning result and the second positioning result.
If deviations are located in the range of predetermined deviation, the position of the first positioning result instruction or the second positioning are tied
Position of the position of fruit instruction as vehicle carried electronic label.
Optionally, the first positioning result is the first coordinate value (X1, Y1) of vehicle carried electronic label, and the second positioning result is car
Carry the second coordinate value (X2, Y2) of electronic tag.
Optionally, deviations include：The first deviation in X-direction | X1-X2 | and the second deviation in Y-direction | Y1-Y2
|。
Deviations are located in the range of predetermined deviation, can include：
First deviation is less than the first predetermined threshold value, and the second deviation is less than the second predetermined threshold value.
Optionally, deviations are the distance between the first coordinate value and the second coordinate value.
Optionally, the first positioning result is the first direction of arrival of radiofrequency signal, and the second positioning result is radiofrequency signal
Second direction of arrival.Deviations are the difference of the first direction of arrival and the second direction of arrival.
The localization method of vehicle carried electronic label provided in this embodiment, executive agent can provide for embodiment illustrated in fig. 1
Vehicle carried electronic label positioner, its technical principle is similar with technique effect, and details are not described herein again.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The relevant hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, execution the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above only illustrating the technical solution of the utility model embodiment, rather than
It is limited；Although the utility model embodiment is described in detail with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It can still modify the technical solution described in foregoing embodiments, or to wherein
Some or all of technical characteristic carries out equivalent substitution；And these are changed or are replaced, the essence of appropriate technical solution is not made
Depart from the scope of the utility model embodiment technical solution.
Claims (7)
- A kind of 1. positioner of vehicle carried electronic label, it is characterised in that including：Phased array antenna, signal processing unit, scene Programmable gate array FPGA processing unit and Digital Signal Processing DSP operation unit；The phased array antenna is connected with the signal processing unit and the FPGA processing units respectively, the signal processing list Member is connected with the FPGA processing units and the DSP operation unit respectively, the FPGA processing units and the DSP operation list Member connection；The phased array antenna, for receiving the radiofrequency signal of vehicle carried electronic label transmission；The signal processing unit, for the radiofrequency signal to be converted to digital signal；The FPGA processing units, for obtaining the vehicle electronics by beam scanning location algorithm according to the digital signal First positioning result of label；The DSP operation unit, for passing through the super-resolution based on Multiple Signal Classification MUSIC algorithms according to the digital signal Rate location algorithm obtains the second positioning result of the vehicle carried electronic label, and according to first positioning result and described second Positioning result determines the position of the vehicle carried electronic label.
- 2. device according to claim 1, it is characterised in that the DSP operation unit is specifically used for：The deviations of the vehicle carried electronic label are obtained according to first positioning result and second positioning result；If the deviations are located in the range of predetermined deviation, by the position of first positioning result instruction or described the Position of the position of two positioning results instruction as the vehicle carried electronic label.
- 3. the apparatus of claim 2, it is characterised in that first positioning result is the vehicle carried electronic label First coordinate value (X1, Y1), second positioning result are the second coordinate value (X2, Y2) of the vehicle carried electronic label.
- 4. device according to claim 3, it is characterised in that the deviations include：The first deviation in X-direction | X1-X2 | and the second deviation in Y-direction | Y1-Y2 |；The deviations are located in the range of predetermined deviation, including：First deviation is less than the first predetermined threshold value, and second deviation is less than the second predetermined threshold value.
- 5. device according to claim 3, it is characterised in that the deviations are first coordinate value and described the The distance between two coordinate values.
- 6. the apparatus of claim 2, it is characterised in that first positioning result is the first of the radiofrequency signal Direction of arrival, second positioning result are the second direction of arrival of the radiofrequency signal；The deviations are described first The difference of direction of arrival and second direction of arrival.
- A kind of 7. roadside unit, it is characterised in that including：Such as determining for claim 1-6 any one of them vehicle carried electronic labels Position device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720637754.7U CN207231498U (en) | 2017-06-02 | 2017-06-02 | The positioner and roadside unit of vehicle carried electronic label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720637754.7U CN207231498U (en) | 2017-06-02 | 2017-06-02 | The positioner and roadside unit of vehicle carried electronic label |
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| Publication Number | Publication Date |
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| CN207231498U true CN207231498U (en) | 2018-04-13 |
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ID=61839104
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720637754.7U Active CN207231498U (en) | 2017-06-02 | 2017-06-02 | The positioner and roadside unit of vehicle carried electronic label |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101638A (en) * | 2017-06-02 | 2017-08-29 | 北京聚利科技股份有限公司 | Positioner, method and the drive test unit of vehicle carried electronic label |
| CN112802357A (en) * | 2020-12-21 | 2021-05-14 | 航天信息股份有限公司 | Vehicle identification and positioning device based on RFID |
-
2017
- 2017-06-02 CN CN201720637754.7U patent/CN207231498U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101638A (en) * | 2017-06-02 | 2017-08-29 | 北京聚利科技股份有限公司 | Positioner, method and the drive test unit of vehicle carried electronic label |
| CN112802357A (en) * | 2020-12-21 | 2021-05-14 | 航天信息股份有限公司 | Vehicle identification and positioning device based on RFID |
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Address after: 101300 room 015, building 8, No. 1, Linkong Second Road, Shunyi Park, Zhongguancun Science and Technology Park, Shunyi District, Beijing Patentee after: BEIJING JULI TECHNOLOGY Co.,Ltd. Address before: 102206, B, 504, Xinyuan Science Park, 97 Changping Road, Beijing, Changping District Patentee before: BEIJING JULI SCIENCE & TECHNOLOGY Co.,Ltd. |