CN113411713A - Positioning method and system based on box and double earphones - Google Patents
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- 238000004891 communication Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000001413 cellular effect Effects 0.000 claims abstract description 4
- 230000009977 dual effect Effects 0.000 claims description 10
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- 238000010586 diagram Methods 0.000 description 16
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000004807 localization Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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Abstract
The invention provides a positioning method and a positioning system based on a box and double earphones, and relates to the technical field of wireless earphone positioning. The method comprises the following steps: determining a location of an undiseased device; the distance and the orientation among the three are measured through the positioning of the device without loss: the Bluetooth module is connected with Bluetooth equipment nearby the equipment in a pairing mode in a Bluetooth communication mode and used for data interaction through the control module and the positioning module used for determining the position of the equipment; the detection module is used for detecting the strength of the radio frequency signal; a communication module in communication with a remote control device over a cellular network; the algorithm module is used for calculating the relative direction or angle among the three modules; therefore, the position relation and the distance and the direction between the three can be displayed on the software, the small program or the webpage link provided by the intelligent earphone finally, and the purpose of finding the lost equipment is achieved.
Description
Technical Field
The invention relates to the technical field of wireless earphone positioning, in particular to a positioning method and a positioning system based on a box and double earphones.
Background
Earphones, also known as earmuffs or headphones, are a pair of conversion units that receive electrical signals from a media player or receiver and convert them into audible sound waves using speakers near the ears.
The wireless earphone is an audio playing device which receives audio data transmitted by an audio signal source (host) in a radio wave form, processes the audio data into an analog audio signal and pushes a loudspeaker to sound. Wireless headsets are becoming more widely used than traditional wired headsets due to their good portability. The TWS intelligent earphone is widely used at present, and consists of a left earphone, a right earphone and a charging box, namely, the left earphone and the right earphone can be charged when being positioned in the charging box, and are convenient to carry; the left and right earphones need to be taken out of the charging bin for use, however, the separation of the earphones and the charging bin can cause some users to forget or not put the earphones back to the box in the first time after the earphones are used up, and the earphones can be easily lost. However, there is currently no good solution to find the box and the earphones.
Therefore, how to design a positioning method and system based on a box and double earphones is an urgent need to solve at present.
Disclosure of Invention
The invention aims to provide a positioning method and a positioning system based on a box and double earphones, so as to solve the problems in the background technology.
The embodiment of the invention is realized by the following steps:
in one aspect, an embodiment of the present application provides a positioning method based on a box and dual earphones, which includes the following steps:
determining a location of an undiseased device;
the distance and the orientation between the three are measured through the positioning of the device which is not lost.
In some embodiments of the present invention, the above-mentioned measuring the distance and the orientation between the three by positioning the device without loss includes the following steps:
the device that is not lost is used as a locator and receives the RF signal of the lost device.
In some embodiments of the present invention, the above-mentioned measuring the distance and the orientation between the three by positioning the device without loss further comprises the following steps:
measuring the strength of the received radio frequency signal;
the angle and distance between any two are measured by the strength of the radio frequency signal.
In some embodiments of the present invention, measuring the directional angle between any two of the above includes:
and calculating the relative orientation or angle between the receiving node and the anchor node of the three nodes by using an AOA positioning algorithm.
In some embodiments of the present invention, the measuring the directional angle between any two further comprises:
the location of the receiving node or anchor node of the lost device is calculated using triangulation.
In another aspect, an embodiment of the present application provides a positioning system based on a box and dual earphones, including:
the positioning module is used for determining the position of the equipment;
the Bluetooth module is connected with Bluetooth equipment nearby in a pairing mode in a Bluetooth communication mode and interacts data;
the detection module is used for detecting the strength of the radio frequency signal;
a communication module for communicating with a remote control device via a cellular network;
the algorithm module is used for calculating the relative direction or angle among the three and calculating the specific positions of the three;
the control module receives a pairing or searching instruction issued by the remote control equipment through the communication module: the method comprises the steps that a Bluetooth module is controlled to scan Bluetooth equipment near an earphone, the Bluetooth module is connected with the scanned Bluetooth equipment in a matching mode, data used for positioning the earphone are obtained from the matched Bluetooth equipment, and the data are sent to remote control equipment; or control the Bluetooth modules to send and receive radio frequency signals mutually.
In some embodiments of the present invention, the positioning module comprises a GPS positioning unit; the GPS positioning unit transmits the position information of the equipment to the remote control equipment through the communication module under the control of the control module.
In some embodiments of the present invention, the detecting module includes a radio frequency signal detecting unit, and the radio frequency signal detecting unit detects the intensity of the radio frequency signal received by the bluetooth module and feeds the intensity back to the algorithm module through the control module.
In some embodiments of the present invention, the algorithm module comprises a positioning algorithm unit; and the positioning algorithm unit calculates the relative direction or angle among the three after receiving the feedback of the detection module.
In some embodiments of the present invention, the algorithm module further comprises a triangulation unit; and the triangulation unit calculates and constructs a triangular graph among the three according to the result of the positioning algorithm unit.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects: the whole device comprises a charging box, a left earphone and a right earphone, when one or two devices are lost, the position of the lost device is determined by a remote control device, the remote control device can be a mobile phone, a tablet and the like, and the whole device can be opened by the remote control device, namely software, an applet or a webpage link and the like provided by the intelligent earphone; i.e. by which the location of the device that has not been lost can be seen.
Through the arrangement of the charging box, the left earphone and the right earphone, the position relation between the charging box and the left earphone and the distance and the direction between the charging box and the right earphone can be displayed on software, small programs or webpage links provided by the intelligent earphone finally, and therefore the purpose of finding lost equipment is achieved.
And this can be achieved whether the charging box or either or both of the right and left earphones are lost.
And under the condition that the three devices are lost, any one of the devices can be found out firstly through positioning, and then the other two devices can be found out more easily through the method.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a method in an embodiment of the invention;
FIG. 2 is a connection block diagram in an embodiment of the invention;
FIG. 3 is a schematic diagram of a positioning module in an embodiment of the invention;
FIG. 4 is a schematic diagram of a detection module according to an embodiment of the invention;
FIG. 5 is a schematic diagram of an algorithm module in an embodiment of the invention;
FIG. 6 is a schematic diagram of an AOA localization algorithm in an embodiment of the present invention;
FIG. 7 is a diagram showing the results of the algorithm in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.
Examples
Referring to fig. 1-7, fig. 1 is a flow chart of a method according to an embodiment of the invention; FIG. 2 is a connection block diagram in an embodiment of the invention; FIG. 3 is a schematic diagram of a positioning module in an embodiment of the invention; FIG. 4 is a schematic diagram of a detection module according to an embodiment of the invention; FIG. 5 is a schematic diagram of an algorithm module in an embodiment of the invention; FIG. 6 is a schematic diagram of an AOA localization algorithm in an embodiment of the present invention; FIG. 7 is a diagram showing the results of the algorithm in the embodiment of the present invention.
In one aspect, an embodiment of the present application provides a positioning method based on a box and dual earphones, which includes the following steps:
s1, determining the position of the device which is not lost;
and S2, measuring the distance and the orientation among the three through the positioning of the device which is not lost.
The whole device comprises a charging box, a left earphone and a right earphone, when one or two devices are lost, the position of the lost device is determined by a remote control device, the remote control device can be a mobile phone, a tablet and the like, and the whole device can be opened by the remote control device, namely software, an applet or a webpage link and the like provided by the intelligent earphone; i.e. by which the location of the device that has not been lost can be seen.
Through the arrangement of the charging box, the left earphone and the right earphone, the position relation between the charging box and the left earphone and the distance and the direction between the charging box and the right earphone can be displayed on software, small programs or webpage links provided by the intelligent earphone finally, and therefore the purpose of finding lost equipment is achieved.
And this can be achieved whether the charging box or either or both of the right and left earphones are lost.
And under the condition that the three devices are lost, any one of the devices can be found out firstly through positioning, and then the other two devices can be found out more easily through the method.
In this embodiment, the above-mentioned measuring the distance and the orientation between the three by the positioning of the device without loss includes the following steps:
the device that is not lost is used as a locator and receives the RF signal of the lost device.
In this embodiment, the above-mentioned measuring the distance and the orientation between the three by the positioning of the device that is not lost further includes the following steps:
measuring the strength of the received radio frequency signal;
the angle and distance between any two are measured by the strength of the radio frequency signal.
For example, when two devices, namely the charging box, the left earphone and the right earphone, are lost, the devices which are not lost are firstly positioned through the remote control device, the position information of the devices is displayed through software, small programs or webpage links and the like opened by the remote control device, then after a searching command is sent out through the remote control device, radio frequency signals are mutually sent out and received among the charging box, the left earphone and the right earphone, then the charging box, the left earphone and the right earphone respectively detect the intensity of the received radio frequency signals, simultaneously judge the sent direction, and calculate the position relation and the distance relation among the charging box, the left earphone and the right earphone according to the detected signal intensity.
In this embodiment, measuring the direction angle between any two of the above-mentioned directions includes the following steps:
and calculating the relative orientation or angle between the receiving node and the anchor node of the three nodes by using an AOA positioning algorithm.
In this embodiment, measuring the direction angle between any two of the above directions further includes:
the location of the receiving node or anchor node of the lost device is calculated using triangulation.
In another aspect, an embodiment of the present application provides a positioning system based on a box and dual earphones, including:
the positioning module is used for determining the position of the equipment;
the Bluetooth module is connected with Bluetooth equipment nearby in a pairing mode in a Bluetooth communication mode and interacts data;
the detection module is used for detecting the strength of the radio frequency signal;
a communication module for communicating with a remote control device via a cellular network;
the algorithm module is used for calculating the relative direction or angle among the three and calculating the specific positions of the three;
the control module receives a pairing or searching instruction issued by the remote control equipment through the communication module: the method comprises the steps that a Bluetooth module is controlled to scan Bluetooth equipment near an earphone, the Bluetooth module is connected with the scanned Bluetooth equipment in a matching mode, data used for positioning the earphone are obtained from the matched Bluetooth equipment, and the data are sent to remote control equipment; or control the Bluetooth modules to send and receive radio frequency signals mutually.
Firstly, the charging box is provided with a communication module and a positioning module, so that a specific position can be positioned, then data is sent to a server background through the communication module, namely, software, an applet or a webpage link and the like opened through remote control equipment, and a user acquires positioning information and map information of the charging box or other two earphones through the software, the applet or the webpage link and the like opened through the remote control equipment and displays the position information on a map. Thus also allowing the bluetooth module to be used as a beacon and bluetooth positioning engine.
The Bluetooth modules of the left and right earphones can be used as Bluetooth beacons. The specific scheme is as follows: the distance and direction between the charging box and the 3 bluetooth devices of the left and right earphones are measured and positioned by each other, and the three bluetooth devices can be used as a positioner to receive radio frequency signals (RSSI) of the other two beacons and Receive Signal Strength Indicators (RSSI) to measure the signal strength of the received signals to obtain the approximate distance between RX and TX, namely the distance between the two devices of the left and right earphones and the charging box.
The specific method for measuring the direction angle between the other two Bluetooth devices is as follows: the AOA positioning algorithm is called arrival angle ranging, is a positioning algorithm based on signal arrival angles, senses the arrival direction of a transmitting node signal through certain base station hardware equipment, calculates the relative direction or angle between a receiving node and an anchor node, and then calculates the position of an unknown node by utilizing a triangulation method or other methods.
That is, the AOA positioning algorithm is used to calculate the relative position or angle between the receiving node and the anchor node, as shown in fig. 6, the principle is as follows: when the included angle alpha 1 between the connecting line from the beacon 1 to the device which is not lost and the reference direction is known, a ray L1 can be drawn; also knowing the angle α 2 between the connection line from the beacon 2 to the device that has not been lost and the reference direction, a ray L2 can be drawn. Then the intersection of month L2 at L1 is the location of the device.
According to the principle, the specific position relation among the three devices can be obtained through the measurement of the three devices.
And then triangulation is used to send the image to the user's remote control device as shown in figure 7, so that the lost device can be found.
In this embodiment, the positioning module includes a GPS positioning unit; the GPS positioning unit transmits the position information of the equipment to the remote control equipment through the communication module under the control of the control module.
In this embodiment, the detecting module includes a radio frequency signal detecting unit, and the radio frequency signal detecting unit detects the intensity of the radio frequency signal received by the bluetooth module and feeds the intensity back to the algorithm module through the control module.
In this embodiment, the algorithm module includes a positioning algorithm unit and a triangulation unit; and the positioning algorithm unit calculates the relative direction or angle among the three after receiving the feedback of the detection module.
In this embodiment, the triangulation unit calculates and constructs a triangular graph among the three according to the result of the positioning algorithm unit.
A positioning method and system based on a box and double earphones have the working principle that: when two of the charging box, the left earphone and the right earphone are lost, the devices which are not lost are firstly positioned through the remote control device, the position information of the devices is displayed through software, small programs or webpage links and the like opened by the remote control device, then after a searching command is sent out through the remote control device, radio frequency signals are mutually sent out and received among the charging box, the left earphone and the right earphone, then the charging box, the left earphone and the right earphone respectively detect the intensity of the received radio frequency signals, simultaneously judge the sent direction, and calculate the position relation and the distance relation among the charging box, the left earphone and the right earphone according to the detected signal intensity.
The control module may be an integrated circuit chip having signal processing capabilities. The control module may be a general control module, including a Central Processing Unit (CPU), a Network control module (NP), and the like; but also Digital Signal Processing (DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
It will be appreciated that the configurations shown in fig. 2-5 are merely illustrative and may include more or fewer components than shown in fig. 2-5 or have different configurations than shown in fig. 2-5. The components shown in fig. 2-5 may be implemented in hardware, software, or a combination thereof.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A positioning method based on a box and double earphones is characterized by comprising the following steps:
determining a location of an undiseased device;
the distance and the orientation between the three are measured through the positioning of the device which is not lost.
2. The method for positioning based on box and double earphone as claimed in claim 1, wherein the step of measuring the distance and orientation between the three by positioning the device without loss comprises the following steps:
the device that is not lost is used as a locator and receives the RF signal of the lost device.
3. The method of claim 2, wherein the step of measuring the distance and orientation between the three devices by positioning the device without loss further comprises the steps of:
measuring the strength of the received radio frequency signal;
the angle and distance between any two are measured by the strength of the radio frequency signal.
4. The box and dual earphone based positioning method as claimed in claim 1, wherein measuring the directional angle between any two comprises the steps of:
and calculating the relative orientation or angle between the receiving node and the anchor node of the three nodes by using an AOA positioning algorithm.
5. The box and dual earphone based positioning method of claim 1, wherein measuring the directional angle between any two further comprises the steps of:
the location of the receiving node or anchor node of the lost device is calculated using triangulation.
6. A box and dual earpiece based positioning system, comprising:
the positioning module is used for determining the position of the equipment;
the Bluetooth module is connected with Bluetooth equipment nearby in a pairing mode in a Bluetooth communication mode and interacts data;
the detection module is used for detecting the strength of the radio frequency signal;
a communication module for communicating with a remote control device via a cellular network;
the algorithm module is used for calculating the relative direction or angle among the three and calculating the specific positions of the three;
the control module receives a pairing or searching instruction issued by the remote control equipment through the communication module: controlling the Bluetooth module to scan Bluetooth equipment near the earphone, connecting the Bluetooth module with the scanned Bluetooth equipment in a matching way, acquiring data for positioning the earphone from the matched Bluetooth equipment, and sending the data to the remote control equipment; or controlling the Bluetooth modules to send and receive radio frequency signals mutually.
7. The box and dual headset based positioning system of claim 6, wherein the positioning module comprises a GPS positioning unit; the GPS positioning unit transmits the position information of the equipment to the remote control equipment through the communication module under the control of the control module.
8. The box-and-headset-based positioning system according to claim 6, wherein the detection module comprises a radio frequency signal detection unit, and the radio frequency signal detection unit detects the intensity of the radio frequency signal received by the bluetooth module and feeds the intensity back to the algorithm module through the control module.
9. The box and dual earpiece based positioning system of claim 6, wherein the algorithm module comprises a positioning algorithm unit; and the positioning algorithm unit calculates the relative direction or angle between the three modules after receiving the feedback of the detection module.
10. A box and dual earpiece based positioning system as set forth in claim 9, wherein the algorithm module further comprises a triangulation unit; and the triangulation unit calculates and constructs a triangular graph among the three according to the result of the positioning algorithm unit.
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| CN116847239A (en) * | 2023-08-09 | 2023-10-03 | 青岛柯锐思德电子科技有限公司 | TWS earphone system with UWB positioning and searching functions and searching method |
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| CN111436040A (en) * | 2019-10-29 | 2020-07-21 | 珠海市杰理科技股份有限公司 | Method for triangularly positioning and retrieving Bluetooth device, Bluetooth device and positioning system |
| CN110972058A (en) * | 2019-11-29 | 2020-04-07 | 歌尔科技有限公司 | Method and device for determining position of wireless communication device |
| CN211352418U (en) * | 2020-03-10 | 2020-08-25 | 深圳市功夫龙实业有限公司 | Anti-lost wireless earphone charging box |
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| CN116847239A (en) * | 2023-08-09 | 2023-10-03 | 青岛柯锐思德电子科技有限公司 | TWS earphone system with UWB positioning and searching functions and searching method |
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