CN108092678A - A kind of variable beam Bluetooth Low Energy beacon apparatus and its implementation - Google Patents
A kind of variable beam Bluetooth Low Energy beacon apparatus and its implementation Download PDFInfo
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- CN108092678A CN108092678A CN201810113485.3A CN201810113485A CN108092678A CN 108092678 A CN108092678 A CN 108092678A CN 201810113485 A CN201810113485 A CN 201810113485A CN 108092678 A CN108092678 A CN 108092678A
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- bluetooth
- antenna
- beacon
- module
- communication unit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention relates to a kind of variable beam Bluetooth Low Energy beacon apparatus and its implementation.A kind of wireless transmission mode of the variable beam of Bluetooth beacon, i.e. when Bluetooth beacon emits wireless signal, the tier or omnidirectional antenna units of different beams direction can be switched to by master control module controls RF switch, that is, constitutes the Bluetooth beacon device of variable beam radiation pattern.Bluetooth signal receives terminal and is handled and judged by the signal of the same beacon different beams to receiving (as having the mobile phone of Bluetooth function), the opposite radial distance with beacon of terminal can not only be obtained, it can also obtain receiving the basic azimuth information of azimuth information of the terminal compared with beacon, particularly front, rear, left and right etc..
Description
Technical field
The invention belongs to bluetooth positioning fields, are related to a kind of variable beam Bluetooth beacon devices and methods therefor.
Background technology
As the application based on location-based service (LBS-Location Based Service) is more and more extensive.Except utilizing
Satellite positioning, such as the Big Dipper, GPS system are provided outside location information, the system that indoor and outdoor local positions are provided using Bluetooth beacon
Research and development also progressively become a hot fields, wherein, the low-power consumption bluetooth beacon based on more than 4.0 version of bluetooth is designed to
One key technology of indoor locating system.
It is that one kind is based on RSSI (RSSI to be currently based on the most common of low-power consumption bluetooth alignment system：Received
Signal Strength Indicator) location technology.Specifically, that utilize is low-power consumption bluetooth device (BLE-
Bluetooth Low Energy) periodically emit the broadcast frame of entitled " announcement frame " (Advertising), as long as it supports
The equipment of BLE can receive.First, when system can set BLE Bluetooth beacons device and receive between device (such as mobile phone) at a distance of 1m
Reception Bluetooth beacon announcement frame reference signal strength.Receiver can according to this with reference to RSSI with receive signal intensity come
Calculate the distance of sending module and receiver.
This RSSI beacons localization method can only provide simple radial distance instruction between receiver and beacon.The system
The receiver is only able to display using Bluetooth beacon as the center of circle, to calculate distance as on the circle of radius；It and again can not the side of further providing for
The more valuable location information such as position, angle.This limitation greatly limits the application and popularization of Bluetooth beacon location technology.
In view of this, the instruction of RSSI radial distances can be provided by how designing one kind, and can provide the contra of receiver (such as mobile phone)
The new Bluetooth beacon device of position information is then the place of the emphasis of the present invention.
The content of the invention
The technical problem to be solved in the present invention is a kind of Bluetooth beacon for making up the deficiencies in the prior art part and proposition
Variable beam wireless transmission mode, i.e., when Bluetooth beacon emit wireless signal when, master control module controls radio frequency can be passed through
The tier or omnidirectional antenna units that switching to different beams are directed toward, that is, constitute variable beam radiation pattern
Bluetooth beacon device.It is different by the same beacon to receiving that Bluetooth signal receives terminal (as having the mobile phone of Bluetooth function)
The signal of wave beam is handled and judged, can not only be obtained the opposite radial distance with beacon of terminal, can also be received
Terminal compared with the azimuth information, particularly front, rear, left and right etc. of beacon basic azimuth information.
The present invention realizes that the device of the function can be realized by using following technical scheme：
The present invention provides a kind of implementation method of the Bluetooth beacon device of variable beam, the Bluetooth beacon device of variable beam
Including main control module, switching module and multi-antenna module.Main control module is mainly by processor unit, bluetooth-communication unit group
Into switching module is made of the cascade structure of single pole multiple throw, and multi-antenna module is by omnidirectional antenna and orientation day
Line forms；When the processor unit in main control module by control signal control single pole multiple throw carry out switching, will select
Fixed antenna element radio frequency conducting；Then will be emitted by digital signal communication between processor unit and bluetooth-communication unit
Parameter passes to bluetooth-communication unit, and specific broadcast frame is controlled hilted broadsword to throw out by bluetooth-communication unit more by processor unit
The antenna element that concern changes gating is launched.
The directional aerial or omnidirectional antenna of multi-antenna module are connected respectively with switch conduction pin in switching module.
Multiple directional aerials of multi-antenna module are distributed in the horizontal plane, according to certain angle around the center of circle.It is if more
There is omnidirectional antenna (omnidirectional antenna refers generally to horizontal plane omnidirectional) in antenna, then omnidirectional antenna is placed on center location.
To realize the work characteristics of Bluetooth Low Energy, the processor unit in main control module is located always with bluetooth-communication unit
In periodic Low-power-consumptiodormancy dormancy and the switch mode of work.Processor unit in main control module at the end of sleep interval,
Bluetooth-communication unit can be waken up；Processor unit can be cut by control signal switching module to be controlled to carry out switch at this time
It changes, selected antenna element radio frequency is turned on；Emission parameter is passed to bluetooth by processor unit by digital signal interface again
Communication unit；Bluetooth-communication unit can load in the broadcast frame of transmitting corresponding digital information according to messaging parameter and pass through and cut
The antenna element for changing gating is launched；Bluetooth-communication unit can be again introduced into low-power consumption mould with processor unit after transmitting
Formula dormancy；Processor unit repeats above operation again after waiting until next dormancy.The work of apparatus described above
Principle is addressed further under as follows：
(1) when working, the bluetooth-communication unit in main control module is in Low-power-consumptiodormancy dormancy state, the processor of main control module
Unit also carries out Low-power-consumptiodormancy dormancy according to certain period distances；
(2) at the end of the processor unit current period dormancy in main control module, can automatically wake up into operating mode,
At this point, processor unit can control the RF switching unit in single pole multiple throw handover module by control signal so that blue
Tooth communication unit is switched by single pole multiple throw to be turned on the given antenna radio frequency in multi-antenna module；
(3) processor unit in main control module is by digital signal interface, by bluetooth-communication unit from low-power consumption mode
It wakes up to operating mode, and transfers emission parameter, bluetooth-communication unit is packed into phase according to the emission parameter received in broadcast frame
Data message is answered, the specific broadcast frame information of antenna element transmitting turned on by single pole multiple throw switching control, the broadcast
Frame information mainly includes beacon and numbers, the antenna element number currently chosen, the information for the antenna element type chosen；
(4) after the bluetooth-communication unit transmitting in main control module, bluetooth-communication unit and processor unit can
Into low-power consumption mode dormancy；
(5) processor unit of main control module carries out dormancy according to pre-set sleep interval duration, and dormancy terminates
Afterwards, processor unit can wake up the stage for entering this flow (2) again.The antenna element turned at this time can be according to certain rule
Then rotation is carried out (such as cumulative rule)；
(6) main working process of the present apparatus is in (2) to cycle operation between (5), when N number of antenna element is according to certain
Rule all switching after the completion of, initial antenna unit will be automatically switched to, restart to follow according to the step of from (2) to (5)
Ring.
Beneficial effects of the present invention：The present apparatus realizes the broadcast of Bluetooth beacon variable beam, is that existing bluetooth at present is believed
The brand-new improvement of positioner is marked, makes Bluetooth beacon that can not only emit the beacon signal of omni-beam, but also can be according to one
The beacon signal for N number of directional beam that set pattern rule transmitting is differently directed.
The use of the present apparatus can be such that single Bluetooth beacon is promoted to from the emitter of ' one-dimensional ' beacon signal ' N-dimensional '
The emitter of beacon signal.The reception terminal of mobile phone etc., after receiving ' multidimensional ' beacon signal that this beacon apparatus emits, warp
It crosses corresponding signal processing and judges, can not only obtain the location information of the radial distance of this opposite beacon, but also can be with
The azimuth information of this opposite beacon is obtained, a certain range of two-dimensional localization is can be carried out so as to fulfill using a beacon.
The application of the device can largely improve the precision of indoor Bluetooth beacon positioning, and bluetooth positions in expansion chamber
Application field；And due to that can realize a certain range using the Bluetooth beacon of a variable beam described in the invention
Interior two-dimensional localization can greatly reduce the deployment quantity of beacon, reduce enforcement difficulty and cost.
Description of the drawings
Fig. 1 is the implementation structure of switch unit in the switching switch module being embodied
Fig. 2 is the method flow diagram in specific embodiment
Fig. 3 is the implementation structure of antenna element in multi-antenna module in specific embodiment
Fig. 4 is the method explanation for carrying out orientation judgement in specific embodiment according to variable beam Bluetooth beacon
As shown in the figure：10th, main control module；101st, bluetooth-communication unit；102nd, processor unit；11st, switching module；
110th, single-pole double-throw switch (SPDT)；111st, four throw switch of hilted broadsword；12nd, multi-antenna module；121st, omnidirectional antenna；122nd, the first orientation day
Line；123rd, the second directional aerial；124th, the 3rd directional aerial；125th, the 4th directional aerial.
Specific embodiment
Below in conjunction with attached drawing 1, attached drawing 2, attached drawing 3, the present invention will be further described for attached drawing 4, but the protection model of the present invention
It encloses and is not limited thereto.
Embodiment：
As shown in Figure 1, the device includes：Main control module 10, switching module 11 and multi-antenna module 12.Wherein, it is main
Control plate is mainly made of bluetooth-communication unit 101, processor unit 102；Switching module 11 is by a single-pole double-throw switch (SPDT)
110 and four throw switch 111 of hilted broadsword form；Multi-antenna module 12 is by horizontal plane omnidirectional antenna (hereinafter referred to as omnidirectional antenna)
121 and first directional aerial 122, the second directional aerial 123, the 3rd directional aerial 124, the 4th directional aerial 125 form.
In main control module 10, communicated between processor unit 102 and bluetooth-communication unit 101 by digital signal realization
With control function.Our selection processor units and the integrated SOC (system- of bluetooth-communication unit in the present embodiment
On-chip systems on chip) chip (such as nRF51822, CC2540 chip) realization.
In switching module 11, the cascade structure of four throw switch 111 of single-pole double-throw switch (SPDT) 110 and hilted broadsword is used with reality
The function of existing " hilted broadsword five is thrown ".
As shown in figure 3, in multi-antenna module 12, the first directional aerial 122, the second directional aerial 123, the 3rd directional aerial
124th, the 4th directional aerial 125, in the horizontal direction with an angle of 90 degrees interval, is evenly distributed on omnidirectional centered on omnidirectional antenna 121
Around antenna.
To realize the work characteristics of Bluetooth Low Energy, processor unit 102 and bluetooth-communication unit in main control module 10
101 are constantly in periodic Low-power-consumptiodormancy dormancy and the switch mode of work.Processor unit 102 in main control module 10 is stopped
It sleeps at the end of interval, bluetooth-communication unit 102 can be waken up；Processor 102 can control switching by control signal at this time
Single-pole double-throw switch (SPDT) 110 and four throw switch 111 of hilted broadsword in module 11 carry out switching, and selected antenna element radio frequency is led
It is logical；Emission parameter is passed to bluetooth-communication unit 101 by processor unit 102 by digital signal interface again；Bluetooth communication list
Member 101 can load in the broadcast frame of transmitting corresponding digital information according to messaging parameter and pass through switching module 11 and gate
121 and first directional aerial 122 of omnidirectional antenna, the second directional aerial 123, the 3rd directional aerial 124, the 4th directional aerial
Antenna element in 125 is launched；Bluetooth-communication unit 101 can be again introduced into low with processor unit 102 after transmitting
Power consumption mode dormancy；Processor unit 102 repeats above operation again after waiting until next dormancy.
As shown in Fig. 2, the operation principle of apparatus described above be addressed further under it is as follows：
(1) when working, the bluetooth-communication unit 101 in main control module 10 is periodically in Low-power-consumptiodormancy dormancy state, processing
Device unit 102 also carries out Low-power-consumptiodormancy dormancy according to certain period distances.
(2) at the end of the 102 current period dormancy of processor unit in main control module 10, can automatically wake up into work
Pattern.At this point, processor unit 102 can control 110 He of single-pole double-throw switch (SPDT) in switching module 11 by control signal
Four throw switch 111 of hilted broadsword makes bluetooth-communication unit 101 pass through the given antenna in switching module 11 and multi-antenna module 12
Radio frequency turns on (such as being turned on omnidirectional antenna units 121).
(3) processor unit 102 in main control module 10 is by digital signal interface, control bluetooth-communication unit 101 from
Low-power consumption mode is waken up to operating mode, and transfers emission parameter.Bluetooth-communication unit 101 according to the emission parameter received,
Corresponding data information is packed into broadcast frame, emitting specific information by the antenna element (such as omnidirectional antenna units 121) of conducting
Broadcast frame information.The broadcast frame information mainly includes beacon and numbers, the antenna element number currently chosen, the antenna element class chosen
The information such as type.
(4) after the bluetooth-communication unit 101 in main control module 10 emits, bluetooth-communication unit 101 and processor
102 can enter low-power consumption mode dormancy.
(5) processor unit 102 of main control module 10 carries out dormancy according to pre-set sleep interval duration.Dormancy
After, processor unit can wake up the stage for entering this flow (2) again.The antenna element turned at this time can be according to certain
Rule carry out rotation (being to switch to the first tier 122 according to cumulative rule in present embodiment).
(6) main working process of the present apparatus is in (2) to cycle operation between (5), when antenna element is according to cumulative rule
Rule be switched to after the completion of the 4th tier 125, will automatically switch to starting omnidirectional antenna units 121, according to from (2) to
(5) the step of, restarts to cycle.
According to above-mentioned job order, as shown in figure 4, after the bluetooth receivers such as mobile phone receive present apparatus signal, it can
To carry out orientation assessment in the following manner.
(1) signal strength that can emit signal by receiving omnidirectional antenna 121 carries out radial distance judgement.
It (2) can be fixed by receiving the first directional aerial 122, the second directional aerial 123, the 3rd directional aerial the 124, the 4th
Horizontal direction judgement is carried out to the signal strength of 125 signal of antenna, specific determination methods are described as follows：
A) P122, P123, P124, P125 are followed successively by receiver and receive the variable beam Bluetooth beacon first in same position
Directional aerial 122, the second directional aerial 123, the 3rd directional aerial 124, the RSSI value (Received of the 4th directional aerial 125
Signal Strength Indication- received signal strengths).
B) maximum and secondary big two values are taken in the RSSI value of P122, P123, P124, P125 as level orientation judgment value.
When two maximum and time big values for diagonally oriented antenna when (such as P122 and P124, P123 and P125), then it is assumed that this measurement
There are the disturbing effects such as multipath for value；This time RSSI acquisitions are invalid, continue next RSSI value acquisition.
C) maximum and secondary big two values are taken in the RSSI value of P122, P123, P124, P125, as maximum and time greatly two
Be worth for adjacent antenna when, once judged.When maximum and time big RSSI differs by more than given threshold, (threshold value setting is generally
1-10dB is set to 3dB in the implementation case), judge that receiver is in the corresponding directional aerial pointing direction of maximum；Work as maximum
When value and second largest value difference are less than given threshold, then it is assumed that receiver is in the corresponding directional aerial of maximum and second largest value corresponds to
Directional aerial intermediate orientation.
D) above-mentioned judgment rule illustrated below.
When receiver receives following data：P122=-50dBm；P123=-60dBm；P124=-80dBm, P125=-
61dBm
P122, second largest value P123 when receiving signal maximum at this time；Two values differ by more than threshold value 3dB, then judge to receive
Machine is in front of the beacon.
When receiver receives following data：P122=-80dBm；P123=-52dBm；P124=-53dBm, P125=-
71dBm
P123, second largest value P124 when receiving signal maximum at this time；Two value differences are less than threshold value 3dB,
Then judge receiver in the left back of the beacon.
When receiver receives following data：P122=-60dBm；P123=-70dBm；P124=-61dBm, P125=-
81dBm
P122, second largest value P124 when receiving signal maximum at this time；Two emitting antennas 122 and 124 is in diagonal, then
Judge that this time receiving RSSI has mushing error, this group of numerical value needs to exclude.
The above is specific embodiments of the present invention, is not intended to limit the scope of the present invention, all foundations
Technical scheme makees any subtle modifications, equivalent variations and modifications to the present invention, belongs to the protection model of the present invention
It encloses.
Claims (4)
1. a kind of variable beam Bluetooth Low Energy beacon apparatus, it is characterised in that：The Bluetooth beacon device of variable beam includes master
Control module, switching module and multi-antenna module.Main control module is mainly made of processor unit, bluetooth-communication unit, is opened
It closes handover module to be made of the cascade structure of single pole multiple throw, multi-antenna module is by omnidirectional antenna and directional aerial group
Into；It, will be selected when the processor unit in main control module controls single pole multiple throw to carry out switching by control signal
Antenna element radio frequency turns on；Then by digital signal communication between processor unit and bluetooth-communication unit, by emission parameter
Bluetooth-communication unit is passed to, specific broadcast frame information is controlled hilted broadsword to throw out by bluetooth-communication unit more by processor unit
The antenna element that concern changes gating is launched.
2. a kind of variable beam Bluetooth Low Energy beacon apparatus according to claim 1, it is characterised in that：Multi-antenna module
Directional aerial or omnidirectional antenna be connected respectively with switch conduction pin in switching module.
3. a kind of variable beam Bluetooth Low Energy beacon apparatus according to claim 1, it is characterised in that：Multi-antenna module
Multiple directional aerials in the horizontal plane, according to certain angle around the center of circle be distributed, have omnidirectional antenna (omnidirectional in multiple antennas
Antenna refers generally to horizontal plane omnidirectional), then omnidirectional antenna is placed on center location.
4. a kind of implementation method of the Bluetooth beacon device of variable beam, it is characterised in that：
This method comprises the following steps：
(1) when working, the bluetooth-communication unit in main control module is in Low-power-consumptiodormancy dormancy state, the processor unit of main control module
Also Low-power-consumptiodormancy dormancy is carried out according to certain period distances；
(2) at the end of the processor unit current period dormancy in main control module, can automatically wake up into operating mode, this
When, processor unit can control the RF switching unit in single pole multiple throw handover module by control signal so that bluetooth
Communication unit is switched by single pole multiple throw to be turned on the given antenna radio frequency in multi-antenna module；
(3) processor unit in main control module is waken up bluetooth-communication unit from low-power consumption mode by digital signal interface
To operating mode, and emission parameter is transferred, bluetooth-communication unit is packed into respective counts according to the emission parameter received in broadcast frame
It is believed that breath, the specific broadcast frame information of antenna element transmitting turned on by single pole multiple throw switching control, broadcast frame letter
Breath mainly includes beacon and numbers, the antenna element number currently chosen, the information for the antenna element type chosen；
(4) after the bluetooth-communication unit transmitting in main control module, bluetooth-communication unit and processor unit can enter
Low-power consumption mode dormancy；
(5) processor unit of main control module carries out dormancy according to pre-set sleep interval duration, after dormancy, place
Reason device unit can wake up the stage for entering this flow (2) again.The antenna element turned at this time can be according to certain rule (such as
Cumulative rule) carry out rotation；
(6) main working process of the present apparatus is in (2) to cycle operation between (5), when N number of antenna element is according to certain rule
Rule all after the completion of switching, will automatically switch to initial antenna unit, restart to cycle according to the step of from (2) to (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113485.3A CN108092678A (en) | 2018-02-06 | 2018-02-06 | A kind of variable beam Bluetooth Low Energy beacon apparatus and its implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113485.3A CN108092678A (en) | 2018-02-06 | 2018-02-06 | A kind of variable beam Bluetooth Low Energy beacon apparatus and its implementation |
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| Publication Number | Publication Date |
|---|---|
| CN108092678A true CN108092678A (en) | 2018-05-29 |
Family
ID=62194225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810113485.3A Pending CN108092678A (en) | 2018-02-06 | 2018-02-06 | A kind of variable beam Bluetooth Low Energy beacon apparatus and its implementation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114294A1 (en) * | 2018-12-07 | 2020-06-11 | 华为技术有限公司 | Antenna panel and wave beam management method and device |
| CN111586652A (en) * | 2020-04-09 | 2020-08-25 | 出门问问信息科技有限公司 | Communication switching method and device and computer readable storage medium |
| CN112532257A (en) * | 2020-11-06 | 2021-03-19 | 深圳市有方科技股份有限公司 | Broadcast signal control method, apparatus, signal transmitting device and storage medium |
| CN112996107A (en) * | 2021-04-13 | 2021-06-18 | 普天信息工程设计服务有限公司 | Antenna device, mobile communication interference signal positioning method and system |
| CN115296712A (en) * | 2022-10-08 | 2022-11-04 | 天津讯联科技有限公司 | Data link device with annular directional antenna array switching function and switching method thereof |
| CN116930857A (en) * | 2023-06-30 | 2023-10-24 | 东土科技(宜昌)有限公司 | Label positioning method and device, storage medium and electronic equipment |
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| US20150296476A1 (en) * | 2014-04-10 | 2015-10-15 | BluFlux RF Technologies, LLC | Positioning beacon and method |
| US20170026794A1 (en) * | 2015-07-21 | 2017-01-26 | IP Funding Group, LLC | Determining relative position with a ble beacon |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114294A1 (en) * | 2018-12-07 | 2020-06-11 | 华为技术有限公司 | Antenna panel and wave beam management method and device |
| CN111586652A (en) * | 2020-04-09 | 2020-08-25 | 出门问问信息科技有限公司 | Communication switching method and device and computer readable storage medium |
| CN111586652B (en) * | 2020-04-09 | 2023-08-18 | 出门问问信息科技有限公司 | Communication switching method, device and computer readable storage medium |
| CN112532257A (en) * | 2020-11-06 | 2021-03-19 | 深圳市有方科技股份有限公司 | Broadcast signal control method, apparatus, signal transmitting device and storage medium |
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| CN112996107A (en) * | 2021-04-13 | 2021-06-18 | 普天信息工程设计服务有限公司 | Antenna device, mobile communication interference signal positioning method and system |
| CN112996107B (en) * | 2021-04-13 | 2021-08-17 | 普天信息工程设计服务有限公司 | Antenna device, mobile communication interference signal positioning method and system |
| CN115296712A (en) * | 2022-10-08 | 2022-11-04 | 天津讯联科技有限公司 | Data link device with annular directional antenna array switching function and switching method thereof |
| CN116930857A (en) * | 2023-06-30 | 2023-10-24 | 东土科技(宜昌)有限公司 | Label positioning method and device, storage medium and electronic equipment |
| CN116930857B (en) * | 2023-06-30 | 2024-03-12 | 东土科技(宜昌)有限公司 | Label positioning method and device, storage medium and electronic equipment |
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