CN109194352A - A kind of ranging intercom and its distance measuring method - Google Patents
A kind of ranging intercom and its distance measuring method Download PDFInfo
- Publication number
- CN109194352A CN109194352A CN201811033782.3A CN201811033782A CN109194352A CN 109194352 A CN109194352 A CN 109194352A CN 201811033782 A CN201811033782 A CN 201811033782A CN 109194352 A CN109194352 A CN 109194352A
- Authority
- CN
- China
- Prior art keywords
- intercom
- ranging
- distance
- tested
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000523 sample Substances 0.000 claims abstract description 15
- 238000005259 measurement Methods 0.000 claims description 8
- 230000006854 communication Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
-
- 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
- H04W4/024—Guidance services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention relates to wireless telecommunications system technical fields, specifically, it is that be related to a kind of ranging intercom and distance measuring method, the present invention include antenna port, RF transmit-receive circuit assembly, BDS&GPS dual-mode antenna, bimodulus navigation positioning module, microprocessor unit, audio frequency processing circuit assembly, microphone, loudspeaker, power supply unit, display unit and push-button unit.This ranging intercom may be implemented in during communicating talkback according to different applications obtain other side's distance and bearing information, according to the distance and bearing information of contacts list timing probe other side, the distance and bearing information of manual dialup timing probe other side, under range channel timing probe other side distance and bearing information.Further this ranging intercom can support Beidou satellite navigation system and GPS navigation system.
Description
Technical field
The present invention relates to wireless telecommunications system technical fields, and in particular to a kind of ranging intercom and its distance measuring method.
Background technique
Nowadays, intercom is widely used in team appointments, such as fleet, mountaineering party, tourism, exploration etc., conventional
Intercom solves communication problem, but a problem is often encountered in team appointments: where is my teammate?
In view of this, applicant furthers investigate intercom, a kind of intercom with distance measurement function is invented, then
There is this case generation.
Summary of the invention
The object of the present invention is to provide a kind of ranging intercom and its distance measuring methods, can say in Liang Tai and obtain phase between machine
Mutual distance and bearing information.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of ranging intercom, host circuit include antenna port, RF transmit-receive circuit assembly, microprocessor unit,
Audio frequency processing circuit assembly, microphone, loudspeaker, power supply unit, display unit and push-button unit；It is entire right by power supply unit
Say that machine provides working power, microphone is connected to the audio input end of audio frequency processing circuit assembly, and loudspeaker is connected at audio
The audio output of circuit assembly is managed, display unit is connected to the display output end of microprocessor unit, and push-button unit is connected to
The key-press input end of microprocessor unit, audio frequency processing circuit assembly and RF transmit-receive circuit assembly respectively with microprocessor unit
It is bi-directionally connected, antenna port is connected to the antenna connection terminal of RF transmit-receive circuit assembly；The RF transmit-receive circuit assembly
Further include BDS&GPS dual-mode antenna using the RF transmit-receive circuit assembly of the modulation system based on 4FSK, and support Beidou and
The bimodulus navigation positioning module of GPS, the bimodulus navigation positioning module are connected to the data receiver of the microprocessor unit,
The BDS&GPS dual-mode antenna is connected to the antenna connection terminal of the bimodulus navigation positioning module.
The BDS&GPS dual-mode antenna is using the double frequency that can support Beidou satellite navigation system and GPS navigation system simultaneously
Section antenna.
A kind of distance measuring method of ranging intercom, the intercom of ranging side send the short message of request ranging by short message protocol
Onto the intercom of tested side, the intercom for being tested side receives pair that the location information of itself is returned to after the short message ranging side
It says machine, the distance between two intercoms and orientation is calculated by the intercom of ranging side.
The distance measuring method is realized especially by following steps:
S1: according to different applications, distance measurement function is divided into: other side's distance and bearing letter is obtained in communication process
It ceases, according to the distance and bearing information of contacts list timing probe other side, the distance of manual dialup timing probe other side and side
Position information, under range channel timing probe other side distance and bearing information；In use, the intercom of ranging side passes through key
Unit enters menu setting, according to corresponding application set be tested side intercom id information, CC code information and when
Gap information；
S2: the short message content for requesting ranging is filled into basis in note data transmission buffer area and worked as by the intercom of ranging side
Preceding setting is sent, and waits the response for being tested the intercom of side；
S3: the intercom for being tested side judges whether to belong to ranging information after receiving data and parsing, if then will be current
The location information of itself replys the intercom that format transmission returns to ranging side with the ranging set；
S4: the intercom of tested side wherein included is parsed after the intercom of ranging side has successfully received the location information
Latitude and longitude information after, the location information of itself and itself is calculated, according to formula AB=Rarccos [cos β 1cos β
2cos (α 1- α 2)+sin β 1sin β 2] calculate the distance of both sides；
Wherein, AB is the distance for representing ranging both sides, and R is the mean radius of the earth；α 1 is the warp of the intercom of ranging side
Angle value, β 1 are the latitude value of the intercom of ranging side, and α 2 is the longitude for being tested the intercom of side, and β 2 is the intercom for being tested side
Latitude value, wherein according to the benchmark of 0 degree of warp, east longitude is positive note, west longitude is negative, north latitude is positive, south latitude is negative；
S5: judge the intercom of ranging side using the intercom for the side of being tested as the list of origin by the latitude and longitude information of both sides
Thus there be intercom of the intercom of bipartite distance and tested side relative to ranging side in position in circle of position
Orientation；
S6: if ranging success, then a unit circle is shown in the display unit of the intercom of ranging side, i.e. plane is straight
Angular coordinate is fastened, and the center of circle is that origin is ranging side, and radius is that unit length is bipartite distance, and according to calculating
The angle come shows that a point indicates in corresponding position；
S7: if ranging failure then shows corresponding failure cause in the display unit of the intercom of ranging side.
Ranging in the step S7 unsuccessfully includes the following two kinds situation:
The intercom of side is tested in the short message for the intercom request ranging for receiving ranging side, if being tested the intercom of side
GPS is not opened, then the information for not opening GPS is fed back to the intercom of ranging side, and ranging Fang Wei opens GPS function and receives this
Then show that other side does not open GPS on its display unit after information；
The intercom of side is tested in the short message for the intercom request ranging for receiving ranging side, if being tested the intercom of side
Itself goes back no-fix, then the information of itself also no-fix is fed back to the intercom of ranging side, and the intercom of ranging side receives
Then show other side without GPS positioning on its display unit after this information.
After adopting the above scheme, ranging intercom of the invention, when work, the intercom of ranging side passes through its microprocessor
Short message protocol in unit sends the short message of request ranging to pair of tested side through its RF transmit-receive circuit assembly and antenna port
It says on machine, is tested the intercom of side after its antenna port, RF transmit-receive circuit assembly receive the short message, which is sent to quilt
The microprocessor unit of the intercom of survey side, the microprocessor unit for being tested the intercom of side receive this short message and parse in it
Rong Hou receives itself GPS positioning information (obtaining by its BDS&GPS dual-mode antenna and bimodulus navigation positioning module) through its radio frequency
Power Generation Road assembly and antenna port are sent to the intercom of ranging side, and the intercom of ranging side is received by its antenna port and radio frequency
Power Generation Road assembly receives the GPS positioning information for being tested the intercom of side, this GPS positioning information is sent to the intercom of ranging side
Microprocessor unit obtains the distance between two intercoms by the microprocessor unit analytical calculation of the intercom of ranging side
And orientation, and distance and azimuth information between two intercoms are being shown in the display unit of the intercom of ranging side.
Detailed description of the invention
Fig. 1 is circuitry functional block diagram of the invention；
Fig. 2 is the display schematic diagram of distance measurement function in the present invention；
Fig. 3 is the control flow chart of distance measurement function in the present invention.
Specific embodiment
A kind of ranging intercom of the invention, as shown in Figure 1, its host circuit includes antenna port 1, RF transmit-receive circuit
Assembly 2, BDS&GPS dual-mode antenna 3, bimodulus navigation positioning module 4, microprocessor unit 5, audio frequency processing circuit assembly 6, Mike
Wind 7, loudspeaker 8, power supply unit 9, display unit 10 and push-button unit 11.Each part mentioned above is all made of known general in industry
Circuit element or module.Wherein:
Working power is provided for entire intercom by power supply unit 9, microphone 7 is connected to audio frequency processing circuit assembly 6
Audio input end, loudspeaker 8 are connected to the audio output of audio frequency processing circuit assembly 6, and display unit 10 is connected to micro process
The display output end of device unit 5, push-button unit 11 are connected to the key-press input end of microprocessor unit 5, and audio frequency processing circuit is total
It is bi-directionally connected respectively with microprocessor unit 5 at 6 and RF transmit-receive circuit assembly 2, antenna port 1 is connected to radio-frequency receiving-transmitting
The antenna connection terminal of circuit assembly 2, bimodulus navigation positioning module 4 are connected to the data receiver of microprocessor unit 5, BDS&
GPS dual-mode antenna 3 is connected to the antenna connection terminal of bimodulus navigation positioning module 4.
In the present invention, using the MCU chip of model GD32F303VGT6, which has powerful microprocessor unit 5
Operation efficiency and Peripheral Interface abundant, highest dominant frequency is up to 120MHz and supports DSP ordering calculation, and it is high that kernel accesses flash memory
Fast zero-waiting.Wherein, the I2C interface of the chip supports quick Plus (Fm+) mode, frequency to reach as high as 1MHz (1MB/s), be
Twice of previous speed, to be adapted to bandwidth applications occasion with higher message transmission rate.SPI interface has also been supported
Four-wire system facilitates extension Quad SPI NOR Flash and realizes high speed access.
In the present invention, related intercom is the digital walkie-talkie of the modulation system based on 4FSK, radio-frequency receiving-transmitting electricity
Road assembly 2 uses the RF transmit-receive circuit assembly of the modulation system based on 4FSK, such as DMR DPMR number format can be used
It is sent and received.
The present embodiment is illustrated by taking DMR format as an example, is supported between intercom by DMR short message protocol with messaging format
Data transmission.
Bimodulus navigation positioning module 4 has high heel using the bimodulus navigation positioning module for supporting Beidou and GPS in the present invention
Track, high acquisition sensitivity, high position precision, low-power consumption, low cost advantage.
In the present invention BDS&GPS dual-mode antenna 3 use dual-band antenna, can support simultaneously Beidou satellite navigation system and
GPS navigation system.
As shown in Fig. 2, the information that display unit 10 is used to provide distance and bearing for distance measurement function is shown.Specifically, believe
Breath C represents the azimuth information for being tested the intercom of side in a manner of orientation diagram, and information D represents the ID letter for being tested the intercom of side
Breath, information E represent the relative bearing and range information of the intercom of ranging side and the intercom for being tested side.
In the present invention, including antenna port 1, RF transmit-receive circuit assembly 2, microprocessor unit 5, audio frequency processing circuit are total
Basic communication frame at 6, microphone 7, loudspeaker 8, power supply unit 9 and display unit 10, the intercom of push-button unit 11 is
Techniques known is not developed in details herein.
The main innovative point of the present invention is distance measurement function, and when work, the intercom of ranging side passes through its microprocessor list
DMR short message protocol in member 5 is sent through its RF transmit-receive circuit assembly and antenna port requests the short message of ranging to tested side
On intercom, be tested side intercom after its antenna port, RF transmit-receive circuit assembly receive the short message, by the short message send to
It is tested the microprocessor unit of the intercom of side, the microprocessor unit for being tested the intercom of side receives this short message and parses it
After content, by itself GPS positioning information (being obtained by its BDS&GPS dual-mode antenna and bimodulus navigation positioning module) through its radio frequency
Transmission circuit assembly and antenna port are sent to the intercom of ranging side, and the intercom of ranging side passes through its antenna port and radio frequency
Transmission circuit assembly receives the GPS positioning information for being tested the intercom of side, this GPS positioning information is sent to the intercom of ranging side
Microprocessor unit, by the microprocessor unit analytical calculation of the intercom of ranging side obtain between two intercoms away from
From and orientation, and in the display unit of the intercom of ranging side show two intercoms between distance and azimuth information.
In the present invention, as shown in figure 3, the distance measuring method of ranging intercom is realized especially by following steps:
S1: according to different applications, distance measurement function is divided into: other side's distance and bearing letter is obtained in communication process
It ceases, according to the distance and bearing information of contacts list timing probe other side, the distance of manual dialup timing probe other side and side
Position information, under range channel timing probe other side distance and bearing information；In use, the intercom of ranging side passes through key
Unit 11 enter menu setting, according to corresponding application (in communication process obtain other side's distance and bearing information, according to
The distance and bearing information of contacts list timing probe other side, the distance and bearing information of manual dialup timing probe other side,
Or under range channel timing probe other side distance and bearing information) set be tested side intercom id information, CC code
Information and gap information；
S2: the intercom of ranging side by push-button unit 11 by the short message content for requesting ranging (short message content be it is fixed, be
The intercom of ranging side intercepts latitude and longitude portion from the RMV format location information that bimodulus navigation positioning module 4 receives
Head character string: QX CMD 004 is answered in add-back) be filled into DMR note data send buffer area in sent out according to current setting
It goes, and waits the response for being tested the intercom of side；
S3: the intercom for being tested side judges whether to belong to ranging information after receiving data and parsing, if then will be current
The location information (intercom for being tested side, which positions, can reply default information when failure) of itself replys format hair with the ranging of setting
Send the intercom for returning to ranging side；Wherein, the ranging of setting is replied format and specifically be can be used: replying head character string QX CMD
004+ latitude+longitude；
S4: the intercom of tested side wherein included is parsed after the intercom of ranging side has successfully received the location information
Latitude and longitude information after, the location information of itself and itself is calculated, according to formula AB=Rarccos [cos β 1cos β
2cos (α 1- α 2)+sin β 1sin β 2] calculate the distance of both sides；
Wherein, AB is the distance of ranging both sides, and R is the mean radius of the earth；α 1 is the longitude of the intercom of ranging side,
β 1 is the latitude value of the intercom of ranging side, and α 2 is the longitude for being tested the intercom of side, and β 2 is the latitude for being tested the intercom of side
Angle value, wherein east longitude is positive note, west longitude is negative, north latitude is positive, south latitude is negative according to the benchmark of 0 degree of warp；
S5: judge the intercom of ranging side using the intercom for the side of being tested as the list of origin by the latitude and longitude information of both sides
Position (for example then its ordinate is negative when being tested the south for the intercom that square intercom is located at ranging side) in circle of position, in this way
Just there is bipartite distance and is tested orientation of the square intercom relative to the intercom of ranging side；
S6: if ranging success, then a unit circle is shown in the display unit of the intercom of ranging side, i.e. plane is straight
Angular coordinate is fastened, and the center of circle is that origin is ranging side, and radius is that unit length is bipartite distance, and according to calculating
The angle come shows that a point indicates in corresponding position；
S7: if ranging failure then shows corresponding failure cause in the display unit of the intercom of ranging side.
Ranging in the step S7 unsuccessfully includes the following two kinds situation:
The intercom of side is tested in the short message for the intercom request ranging for receiving ranging side, if being tested the intercom of side
GPS is not opened, then the information for not opening GPS is fed back to the intercom of ranging side, and ranging Fang Wei opens GPS function and receives this
Then show that other side does not open GPS on its display unit after information；
The intercom of side is tested in the short message for the intercom request ranging for receiving ranging side, if being tested the intercom of side
Itself goes back no-fix, then the information of itself also no-fix is fed back to the intercom of ranging side, and the intercom of ranging side receives
Then show other side without GPS positioning on its display unit after this information.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
The restriction of embodiment can also make on the basis of the above description for those of ordinary skill in the art
The variation or variation of other different structure forms.There is no necessity and possibility to exhaust all the enbodiments.And these belong to
It is still in the protection scope of this invention in the obvious changes or variations that spirit of the invention is extended out.
Claims (5)
1. a kind of ranging intercom, host circuit includes antenna port, RF transmit-receive circuit assembly, microprocessor unit, sound
Frequency processing circuit assembly, microphone, loudspeaker, power supply unit, display unit and push-button unit；It is entire intercommunication by power supply unit
Machine provides working power, and microphone is connected to the audio input end of audio frequency processing circuit assembly, and loudspeaker is connected to audio processing
The audio output of circuit assembly, display unit are connected to the display output end of microprocessor unit, and push-button unit is connected to micro-
The key-press input end of processor unit, audio frequency processing circuit assembly and RF transmit-receive circuit assembly respectively with microprocessor unit into
Row is bi-directionally connected, and antenna port is connected to the antenna connection terminal of RF transmit-receive circuit assembly；It is characterized by: the radio-frequency receiving-transmitting
Circuit assembly uses the RF transmit-receive circuit assembly of the modulation system based on 4FSK, further includes BDS&GPS dual-mode antenna, Yi Jizhi
Beidou and the bimodulus navigation positioning module of GPS are held, the bimodulus navigation positioning module is connected to the number of the microprocessor unit
According to receiving end, the BDS&GPS dual-mode antenna is connected to the antenna connection terminal of the bimodulus navigation positioning module.
2. a kind of ranging intercom according to claim 1, it is characterised in that: the BDS&GPS dual-mode antenna uses can
The dual-band antenna of Beidou satellite navigation system and GPS navigation system is supported simultaneously.
3. a kind of distance measuring method of ranging intercom as claimed in claim 1 or 2, it is characterised in that: the intercom of ranging side passes through
Short message protocol is sent in the short message to the intercom of tested side of request ranging, and the intercom for being tested side receives itself after the short message
Location information return to the intercom of ranging side, by the intercom of ranging side be calculated the distance between two intercoms and
Orientation.
4. a kind of distance measuring method of ranging intercom according to claim 3, it is characterised in that: the distance measuring method tool
Body is achieved by the steps of:
S1: according to different applications, distance measurement function is divided into: other side's distance and bearing information, root are obtained in communication process
Believe according to the distance and bearing of the distance and bearing information of contacts list timing probe other side, manual dialup timing probe other side
Breath, under range channel timing probe other side distance and bearing information；In use, the intercom of ranging side passes through push-button unit
Into menu setting, the id information for being tested the intercom of side, CC code information and time slot letter are set according to corresponding application
Breath；
S2: the short message content for requesting ranging is filled into note data and sent in buffer area according to current by the intercom of ranging side
Setting is sent, and waits the response for being tested the intercom of side；
S3: the intercom for being tested side judges whether to belong to ranging information after receiving data and parsing, if then will it is current itself
Location information format replied with the ranging that sets send and return to the intercom of ranging side；
S4: the warp of the intercom of tested side wherein included is parsed after the intercom of ranging side has successfully received the location information
After latitude information, the location information of itself and itself is calculated, according to formula AB=Rarccos [cos β 1cos β 2cos (α
1- α 2)+sin β 1sin β 2] calculate the distance of both sides；
Wherein, AB represents the distance of ranging both sides, and R is the mean radius of the earth；α 1 is the longitude of the intercom of ranging side, β 1
For the latitude value of the intercom of ranging side, α 2 is the longitude for being tested the intercom of side, and β 2 is the latitude for being tested the intercom of side
Value, wherein east longitude is positive note, west longitude is negative, north latitude is positive, south latitude is negative according to the benchmark of 0 degree of warp；
S5: judge the intercom of ranging side using the intercom for the side of being tested as the unit circle of origin by the latitude and longitude information of both sides
Thus there is bipartite distance in interior position and is tested side of the square intercom relative to the intercom of ranging side
Position；
S6: if ranging success, then show that a unit circle, i.e. flat square are sat in the display unit of the intercom of ranging side
Mark is fastened, and the center of circle is that origin is ranging side, radius is that unit length is bipartite distance, and according to calculating
Angle shows that a point indicates in corresponding position；
S7: if ranging failure then shows corresponding failure cause in the display unit of the intercom of ranging side.
5. a kind of distance measuring method of ranging intercom according to claim 4, it is characterised in that: the survey in the step S7
Away from unsuccessfully including the following two kinds situation:
The intercom of side is tested in the short message for the intercom request ranging for receiving ranging side, if the intercom for being tested side is not opened
GPS is opened, then the information for not opening GPS is fed back to the intercom of ranging side, ranging Fang Wei opens GPS function and receives this information
Then show that other side does not open GPS on its display unit afterwards；
The intercom of side is tested in the short message for the intercom request ranging for receiving ranging side, if being tested the intercom itself of side
The information of itself also no-fix, then is fed back to the intercom of ranging side by also no-fix, and the intercom of ranging side receives this letter
Then show other side without GPS positioning on its display unit after breath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033782.3A CN109194352A (en) | 2018-09-05 | 2018-09-05 | A kind of ranging intercom and its distance measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033782.3A CN109194352A (en) | 2018-09-05 | 2018-09-05 | A kind of ranging intercom and its distance measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109194352A true CN109194352A (en) | 2019-01-11 |
Family
ID=64914690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811033782.3A Pending CN109194352A (en) | 2018-09-05 | 2018-09-05 | A kind of ranging intercom and its distance measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109194352A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2896702Y (en) * | 2006-04-27 | 2007-05-02 | 陈建民 | Wakie-talkie with positioning function |
| CN2904479Y (en) * | 2006-03-14 | 2007-05-23 | 邓新文 | Satellite positioning interphone device |
| CN201114592Y (en) * | 2007-07-02 | 2008-09-10 | 庆邦电子（深圳）有限公司 | Mobile phone for location information exchange via SMS |
| CN203504636U (en) * | 2013-09-17 | 2014-03-26 | 湖州致远科技股份有限公司 | Mobile phone with interphone function |
| CN103746716A (en) * | 2013-11-30 | 2014-04-23 | 成都兆益科技发展有限责任公司 | Interphone with GPS positioning |
| CN208623658U (en) * | 2018-09-05 | 2019-03-19 | 泉州市琪祥电子科技有限公司 | A kind of intercom |
-
2018
- 2018-09-05 CN CN201811033782.3A patent/CN109194352A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2904479Y (en) * | 2006-03-14 | 2007-05-23 | 邓新文 | Satellite positioning interphone device |
| CN2896702Y (en) * | 2006-04-27 | 2007-05-02 | 陈建民 | Wakie-talkie with positioning function |
| CN201114592Y (en) * | 2007-07-02 | 2008-09-10 | 庆邦电子（深圳）有限公司 | Mobile phone for location information exchange via SMS |
| CN203504636U (en) * | 2013-09-17 | 2014-03-26 | 湖州致远科技股份有限公司 | Mobile phone with interphone function |
| CN103746716A (en) * | 2013-11-30 | 2014-04-23 | 成都兆益科技发展有限责任公司 | Interphone with GPS positioning |
| CN208623658U (en) * | 2018-09-05 | 2019-03-19 | 泉州市琪祥电子科技有限公司 | A kind of intercom |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10021669B2 (en) | Techniques for tracking destinations on a mobile computing device | |
| US9125165B2 (en) | WLAN-based positioning system | |
| JP2009526226A (en) | Internet-based assisted global positioning system | |
| CN101950027A (en) | Navigational satellite signal receiving module and information processing method applied to same | |
| CN109151210A (en) | Mobile terminal, information display method and related product | |
| CN103945331A (en) | Positioning method using WIFI field intensity for departure angle estimation | |
| CN115176449B (en) | High-end device assisted low-end device group delay calibration for NR positioning | |
| CN113784276A (en) | Positioning method, relay equipment, Internet of things equipment and network equipment | |
| CN215495174U (en) | Electronic student identity card and positioning system for students | |
| Ma et al. | The design of vehicle tracking and positioning system | |
| CN105163383A (en) | Indoor information push method based on Bluetooth | |
| CN208623658U (en) | A kind of intercom | |
| CN107613099A (en) | Load the method and device of emergency numbers | |
| CN109194352A (en) | A kind of ranging intercom and its distance measuring method | |
| JP3601355B2 (en) | GPS-based information system | |
| CN110769498A (en) | Method and system for positioning lost population based on low-power-consumption Bluetooth | |
| KR101043539B1 (en) | Mobile communication terminal with survey function and method of controlling the same | |
| WO2022268197A1 (en) | Positioning processing method, positioning reference signal sending method, apparatus, and device | |
| CN203313196U (en) | Radio monitoring system suitable for portable radio monitoring integrated machine having receiving terminal | |
| CN215678791U (en) | Wireless communication module, positioning system and shared vehicle | |
| CN113242097B (en) | Underwater positioning method and related device | |
| CN101515034A (en) | Positioning device and method for measuring distance | |
| CN108768501A (en) | A kind of oil field Data transfer system and method based on Beidou satellite communication | |
| RU68821U1 (en) | MOBILE NAVIGATION TERMINAL | |
| CN102752449A (en) | Method and terminal for indicating direction and position of contact person objects in mobile communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |