CN110133693A - Big-dipper satellite positioning terminal and its localization method based on ARM Crotex-M4 and μ CGUI - Google Patents
Big-dipper satellite positioning terminal and its localization method based on ARM Crotex-M4 and μ CGUI Download PDFInfo
- Publication number
- CN110133693A CN110133693A CN201910493140.XA CN201910493140A CN110133693A CN 110133693 A CN110133693 A CN 110133693A CN 201910493140 A CN201910493140 A CN 201910493140A CN 110133693 A CN110133693 A CN 110133693A
- Authority
- CN
- China
- Prior art keywords
- module
- main control
- touch
- beidou
- big
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
Abstract
The invention discloses a kind of big-dipper satellite positioning terminal and its positioning signal reception method based on ARM Crotex-M4 and μ CGUI, it is related to technical field of navigation and positioning, the terminal includes main control chip, " Beidou two " receiver module, human-computer interaction module, touch-control module and power module, " Beidou two " receiver module is communicated with main control chip, the human-computer interaction module carries out control using the LTDC of main control chip and shows, image is filled and is carried using DMA2D, touch-control module inputs touch data to main control module by IIC interface, the power module is main control chip, " Beidou two " receiver module, voltage needed for touch-control module etc. provides work, present system uses modularized design, main control chip, which uses, is based on ARM Cr Otex-M4 high-performance low-power-consumption microcontroller core STM32F429IGT6, and arrange in pairs or groups RGBLCD LCD MODULE and the ATGM336H-5N Beidou navigation module based on AT6558 chip, have collectively constituted the hardware core of this system, can externally carry out hardware expanding.
Description
Technical field
The invention belongs to technical field of navigation and positioning, and in particular to a kind of north based on ARM Crotex-M4 and μ CGUI
Struggle against satellite positioning-terminal and its positioning signal reception method.
Background technique
In recent years, the related terminal device for being positioned and being navigated using Beidou satellite navigation system, which is led, to emerge one after another, more
Come the application of the visible Beidou terminal in more fields, and constantly improve and traffic road with China's Beidou satellite navigation system
The increasingly complexity on road, people require the precision, power consumption, operability etc. of navigation system higher and higher.However China's Beidou is defended
Star navigation terminal generally uses discrete component, at the cores such as programmable logic device therein and digital signal processing device
Device is managed often from external import, causes its substitutability smaller, faces biggish risk, there are security risks, defend in future
It needs to improve its safety in the development of star navigation terminal.And the universal elements of common Beidou satellite navigation terminal are with FPGA
The mode of+DSP is built, and often volume is bigger and energy consumption is also relatively high for the universal elements under this mode.Therefore,
It is compared to GPS, Beidou satellite navigation system is also less in civilian upper application at present, mainly due to Beidou that terminal uses
Chip cost is high, and it still needs further improvement for the kernel component and manufacture level of end product, although the technique of chip is
Reach Nano grade, but power consumption is also larger with volume, under becoming thin in electronic equipment, becoming small trend, end product
There is no advantage in the price and technique of chip.Component is carried out using baseband chip and radio frequency chip to replace becoming trend, it is portable
The development of the mobile terminals such as terminal, handheld terminal also becomes big-dipper satellite positioning terminal future thrust.
Summary of the invention
The purpose of the present invention is to provide a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI, with
It the functions such as realizes high-precision time service, positions, tests the speed, can be widely applied to the multiple fields such as automobile, ship, handheld device.
A kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI, including main control chip, " Beidou two
Number " receiver module, human-computer interaction module, touch-control module and power module, " Beidou two " receiver module and master
Control chip is communicated, and the human-computer interaction module carries out control using the LTDC of main control chip and shows, using DMA2D to figure
As being filled and carrying, touch-control module inputs touch data to main control module by IIC interface, and the power module is master control
Voltage needed for chip, " Beidou two " receiver module, touch-control module etc. provide work.
Preferably, the main control chip, which uses, is based on ARM Crotex-M4 high-performance microcontroller chip
STM32F429IGT6。
Preferably, described " Beidou two " receiver module is using AT6558 as Big Dipper satellite signal receiver chip.
Preferably, described " Beidou two " receiver module is communicated particular by UART with main control chip.
Preferably, the human-computer interaction module is touched using the high-resolution RGBLCD projecting type capacitor of 7 cun of 1024*600
Screen.
Preferably, the touch-control module drives IC to detect capacitance touch using GT911.
Preferably, the power module uses AMS1117 voltage stabilizing chip for main control chip, " Beidou two " receiver mould
Voltage needed for block, touch-control module etc. provide work.
A kind of positioning signal reception method of the big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI, including
Following steps:
(1) big-dipper satellite transmitting radio frequency antenna signal through " Beidou two " receiver module receives and pass through UART and
Main control chip is communicated, after main control chip receives signal, using based on ARM Crotex-M4 microcontroller core
STM32F429IGT6 carries out data processing, output control, graphic plotting etc.；
(2) human-computer interaction module carries out control using the LTDC of main control chip and shows, is filled using DMA2D to image
And carrying, enhance the performance of graphical display, and coordinate information will be positioned accordingly and shown on human-computer interaction interface, meanwhile, touching
Control module drives IC using GT911 to detect capacitance touch, and inputs touch data to main control unit by IIC interface to select
It selects corresponding display interface and carries out the setting of relevant parameter.
The present invention has the advantages that
1, system uses modularized design, and main control chip, which uses, is based on ARM Crotex-M4 high-performance low-power-consumption microcontroller
Device kernel STM32F429IGT6, and arrange in pairs or groups RGBLCD LCD MODULE and the north ATGM336H-5N based on AT6558 chip
Struggle against navigation module, has collectively constituted the hardware core of this system, can externally carry out hardware expanding.
2, using bottom layer driving and μ C/GUI as core on software, bottom layer driving realizes the basic operating of system, μ C/GUI
The interface of system is realized, including time showing, geographical location are shown, movement velocity is shown, and aobvious using its figure
Show function, realizes the figure dynamic display of above- mentioned information.Possess better vision and tactile experience than traditional TFTLCD.
3, can be achieved accurately time service, longitude and latitude, spatial altitude Real time dynamic display and test the speed.
4, with other compared with Terminal Type, which has many advantages, such as that small in size, low in energy consumption, real-time is high.
Detailed description of the invention
Fig. 1 is the control principle drawing of the embodiment of the present invention 1.
Fig. 2 is initial interface schematic diagram in the present invention.
Fig. 3 is real time information display interface schematic diagram in the present invention.
Fig. 4 is super-heterodyne architecture schematic diagram in the present invention.
Fig. 5 is QPSK signal modulation block diagram in the present invention.
Fig. 6 is that QPSK signal demodulates block diagram in the present invention.
Fig. 7 is system flow chart in the present invention.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
As shown in Figures 1 to 7, a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI, including master
Chip, " Beidou two " receiver module, human-computer interaction module, touch-control module and power module are controlled, it is described " Beidou two "
Receiver module is communicated with main control chip, and the human-computer interaction module carries out control using the LTDC of main control chip and shows,
Image is filled and is carried using DMA2D, touch-control module inputs touch data to main control module by IIC interface, described
Power module is voltage needed for main control chip, " Beidou two " receiver module, touch-control module etc. provide work.
In the present embodiment, the main control chip, which uses, is based on ARM Crotex-M4 high-performance microcontroller chip
STM32F429IGT6, STM32F429IGT6 main control chip have TFTLCD controller, i.e. LTDC passes through LTDC, main control chip
Can directly external RGBLCD screen, realize liquid crystal drive.The LTDC of STM32F429IGT6 shares 28 signal wire lines, including 24
Root data line, a pixel clock synchronism output line, a horizontal synchronization line, a vertical synchronization line, radical evidence make energy line.
The LTDC supports RGB888 color format, but to save IO, improves picture and show that speed, the system use RGB565 format.It removes
The outer LTDC controller of signal wire further includes image processing unit, AHB interface, configuration and status register, clock etc..It uses
RGBLCD liquid crystal display increases the ease for use of system as human-computer interaction interface.
In the present embodiment, the chip of described " Beidou two " receiver module is more using a high-performance BDS/GNSS
Mould satellite navigation receiver SOC single-chip AT6558, AT6558 use 55nm CMOS technology, on piece integrated RF front end, number
Baseband processor, 32 risc processors, power management function.Working frequency reaches as high as 150MHz, and makes by oneself not
Dormancy, operational process reduce the function of power consumption automatically.
In the present embodiment, described " Beidou two " receiver module is led to particular by UART and main control chip
Letter, signal, which receives, uses active antenna design scheme.
In the present embodiment, the human-computer interaction module uses the high-resolution RGBLCD projection-type electricity of 7 cun of 1024*600
Hold touch screen, transplants design of the μ C/GUI shape library for human-computer interaction interface.
In the present embodiment, the touch-control module drives IC to detect capacitance touch using GT911, and GT911 is as LCD
Touch controller, possess a large amount of register, for configuring relevant parameter, these parameters are provided by genuine mostly, user only
It need to be by parameter writing controller.The main part of GT911 driver has: controller initialization, contact scanning, read-write are posted
The value of storage sends data etc. to IIC.Since the Hardware I IC stability of STM32F4 is bad, which uses software mould
Quasi- IIC realizes the data interaction of GT911 and main control chip.
In the present embodiment, the power module uses AMS1117 voltage stabilizing chip to receive for main control chip, " Beidou two "
Voltage needed for machine module, touch-control module etc. provide work.
The invention also discloses the positioning of the above-mentioned big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI letters
Number method of reseptance, includes the following steps:
(1) big-dipper satellite transmitting radio frequency antenna signal through " Beidou two " receiver module receives and pass through UART and
Main control chip is communicated, after main control chip receives signal, using based on ARM Crotex-M4 microcontroller core
STM32F429IGT6 carries out data processing, output control, graphic plotting etc.；
(2) human-computer interaction module carries out control using the LTDC of main control chip and shows, is filled using DMA2D to image
And carrying, enhance the performance of graphical display, and coordinate information will be positioned accordingly and shown on human-computer interaction interface, meanwhile, touching
Control module drives IC using GT911 to detect capacitance touch, and inputs touch data to main control unit by IIC interface to select
Corresponding display interface and the setting for carrying out relevant parameter.
It is specifically described concrete operating principle of the invention below:
1. " Beidou two " receiver designs
1.1 " Beidou two " B1 signal structures
The signal of " Beidou two " can be expressed as the product of ranging code, data and quadrature carrier.This terminal uses
" Beidou two " system B1 frequency band signals.Wherein, ranging code uses the common ranging code of the I branch of open service, carrier wave
It uses towards civilian I frequency range carrier wave, frequency 1561.098MHz.
B1 frequency band signals expression formula is as follows:
In formula, subscript j indicates satellite number；AB1IIndicate B1 signal I branch ranging code amplitude；AB1QIndicate B1 signal Q branch
The ranging code amplitude on road；Indicate B1I signal ranging code,Indicate BQ signal ranging code,Expression is modulated at B1I survey
Away from the data on code,Indicating the data being modulated on B1Q ranging code, f indicates signal(-) carrier frequency,Indicate B1I letter
Number carrier wave first phase,Indicate B1Q signal carrier first phase.
1.2 radio-frequency front-end topological structures
Radio-frequency front-end uses super-heterodyne architecture, and super-heterodyne architecture is the most widely used one kind in a communication receiver
Structure is mixed using locally generated Sasser with input signal, and it is predetermined that frequency input signal is transformed to some
Frequency.It uses Armstrong to propose in 1918 at first.Attached drawing 4 is super-heterodyne architecture schematic diagram.
Superhet radio-frequency front-end passes through one or many down coversions, the signal that antenna is received, through radio-frequency filter
Out-of-band noise is filtered out, then by low-noise amplifier, is then mixed again with local oscillation signal, is amplified by intermediate-frequency filter and intermediate frequency
Device is generated to required intermediate-freuqncy signal.
1.3QPSK modulation and demodulation
" Beidou two " uses a kind of novel digital modulation technique QPSK, i.e. quadrature phase shift keying.It inputs base band
Signal is bipolarity non-return-to-zero symbol, generates two-way paralleled code element I channel signal and Q channel signal to serial/parallel transformation, this two
Road symbol signal is multiplied with two-way quadrature carrier respectively, is finally added and obtains QPSK signal.Its functional block diagram is as shown in Fig. 5.
Thus B1 frequency band signals shown in " Beidou two " capable of emitting formula (1).
Equally, need to demodulate QPSK signal in receiving end, QPSK signal be considered as when demodulating two it is orthogonal
The superposition of 2PSK signal, i.e.,With
Superposition, therefore the orthogonal coherent carrier of two-way can be used and go to demodulate, that is, may separate out the orthogonal 2PSK signal of this two-way.Most
Afterwards again by the orthogonal 2PSK signal of this two-way by parallel/serial variation, become serial data output.It demodulates block diagram such as attached drawing 6.
By B1 frequency band signals expression formula it is found that can finally demodulate comprising ranging codeAnd navigation messageIt is serial
Signal.
The design of 2 terminal softwares
The acquisition and parsing of 2.1 satellite datas
AT6558 is a high-performance BDS/GNSS multimodal satellite navigation receiver SOC single-chip, before on piece integrated RF
End, digital baseband processor, power management modules.By the chip can realize the acquisition of " Beidou two " B1 frequency band signals with
Demodulation, and exported by RS232 serial ports.
Receiver and main control chip are exported using UART as main output channel according to the protocol format of NMEA0183.Number
Serial and asynchronous mode transmits accordingly.1st is start bit, is followed by data bit.
Its data mode is as shown in appendix 1.
1 data mode of subordinate list
| Start bit | D0 | D1 | D2 | D3 | D4 | D5 | D6 | D7 | Stop | Position |
Parameter used in data is transmitted as shown in subordinate list 2.
Subordinate list 2 transmits parameter used in data
| Baud rate | 9600bps |
| Data bit | 8 |
| Stop position | Position 1 |
| Check bit | Position nothing |
According to NMEA protocol frame, following data parsing code is designed:
Above-mentioned code mainly differentiates that serial ports receives whether data register is sky, deposits data if non-empty using if sentence
Be put into array BDS_RX_BUF [], then judge that the starting character " $ " of NMEA0183 agreement whether there is again, and if it exists, then after
It is continuous to judge whether the 4th and the 5th be " M " and " C ", for filtering out most simple location information.Its flow chart is as shown in Fig. 7.
3 terminal tests
Terminal booting display is initial to welcome interface, after information to be shown can be selected by touch screen.The use of terminal by
To the influence of environment, preferably tested in spacious outdoor environment.By parsing frame data:
$GNRMC,063944.000,A,3133.6048,N,11841.0848,E,4.152,292.44,141216,,,A*
75
I.e. current UTC time is 063944.000, geographical location 31.336048,118.410848, and movement velocity is
4.152 section.Above data is converted, obtain current UTC time be 8 points 15 seconds 21 minutes, i.e., 16 points of Beijing time 21 minutes 15
Second, geographical location is 31 degree 20 points of north latitude 16 seconds, and 118 degree 24 points of east longitude 19 seconds, movement velocity was 7.6895 kilometer per hours.
Attached drawing 2 is initial interface schematic diagram, and real time information can be entered by clicking " Display real-time information " button
Display interface.Attached drawing 3 is real time information display interface schematic diagram.
Modularized design is used based on above-mentioned, of the invention system, main control chip, which uses, is based on ARM Crotex-M4 high
Can low-power consumption microcontroller core STM32F429IGT6, and the RGBLCD LCD MODULE and based on AT6558 chip of arranging in pairs or groups
ATGM336H-5N Beidou navigation module has collectively constituted the hardware core of this system, can externally carry out hardware expanding.On software
Using bottom layer driving and μ C/GUI as core, bottom layer driving realizes the basic operating of system, and μ C/GUI realizes the interface of system
Design, including time showing, geographical location are shown, movement velocity is shown, and utilize its graphical display function, realize above-mentioned letter
The figure dynamic display of breath.Possess better vision and tactile experience than traditional TFTLCD.Accurately time service, longitude and latitude can be achieved
Degree, spatial altitude Real time dynamic display and test the speed.With other compared with Terminal Type, which has small in size, low in energy consumption, real
The advantages that Shi Xinggao.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.Institute
Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.
Claims (8)
1. a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI, which is characterized in that including main control chip,
" Beidou two " receiver module, human-computer interaction module, touch-control module and power module, " Beidou two " the receiver mould
Block is communicated with main control chip, and the human-computer interaction module carries out control using the LTDC of main control chip and shows, uses DMA2D
Image is filled and is carried, touch-control module inputs touch data to main control module by IIC interface, and the power module is
Voltage needed for main control chip, " Beidou two " receiver module, touch-control module etc. provide work.
2. a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI according to claim 1, special
Sign is: the main control chip, which uses, is based on ARM Crotex-M4 high-performance microcontroller chip STM32F429IGT6.
3. a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI according to claim 2, special
Sign is: " Beidou two " receiver module is using AT6558 as Big Dipper satellite signal receiver chip.
4. a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI according to claim 3, special
Sign is: " Beidou two " receiver module is communicated particular by UART with main control chip.
5. a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI according to claim 4, special
Sign is: the human-computer interaction module uses the high-resolution RGBLCD projection-type capacitive touch screen of 7 cun of 1024*600.
6. a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI according to claim 5, special
Sign is: the touch-control module drives IC to detect capacitance touch using GT911.
7. a kind of big-dipper satellite positioning terminal based on ARM Crotex-M4 and μ CGUI according to claim 6, special
Sign is: the power module uses AMS1117 voltage stabilizing chip for main control chip, " Beidou two " receiver module, touch-control mould
Voltage needed for block etc. provides work.
8. a kind of positioning letter of big-dipper satellite positioning terminal as claimed in claim 7 based on ARM Crotex-M4 and μ CGUI
Number method of reseptance, which comprises the steps of:
(1) radio frequency antenna signal of big-dipper satellite transmitting receives through " Beidou two " receiver module and passes through UART and master control core
Piece is communicated, after main control chip receives signal, using based on ARM Crotex-M4 microcontroller core
STM32F429IGT6 carries out data processing, output control, graphic plotting etc.；
(2) human-computer interaction module carries out control using the LTDC of main control chip and shows, image is filled and is removed using DMA2D
Fortune, enhances the performance of graphical display, and will position accordingly coordinate information and show on human-computer interaction interface, meanwhile, touch-control mould
Block drives IC using GT911 to detect capacitance touch, and inputs touch data to main control unit by IIC interface to select accordingly
Display interface and carry out the setting of relevant parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493140.XA CN110133693A (en) | 2019-06-06 | 2019-06-06 | Big-dipper satellite positioning terminal and its localization method based on ARM Crotex-M4 and μ CGUI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493140.XA CN110133693A (en) | 2019-06-06 | 2019-06-06 | Big-dipper satellite positioning terminal and its localization method based on ARM Crotex-M4 and μ CGUI |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110133693A true CN110133693A (en) | 2019-08-16 |
Family
ID=67580506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910493140.XA Pending CN110133693A (en) | 2019-06-06 | 2019-06-06 | Big-dipper satellite positioning terminal and its localization method based on ARM Crotex-M4 and μ CGUI |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110133693A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108170475A (en) * | 2017-12-21 | 2018-06-15 | 中国船舶重工集团公司第七0七研究所 | A kind of embedded software development method for mobile heading reference equipment |
| CN111221464A (en) * | 2019-12-24 | 2020-06-02 | 太原航空仪表有限公司 | Graphic processing module and method for aeronautical instrument |
| CN115453511A (en) * | 2022-11-09 | 2022-12-09 | 成都四维智慧电子科技有限公司 | Cooperative target accurate distance-fixing method based on millimeter wave radar chip |
| CN115508872A (en) * | 2022-09-27 | 2022-12-23 | 安徽理工大学 | GNSS data acquisition and positioning system based on embedded platform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592668A (en) * | 2013-08-29 | 2014-02-19 | 柳州天运寰通科技有限公司 | Wrist band type Beidou satellite positioning device |
| US20170160095A1 (en) * | 2002-04-10 | 2017-06-08 | Bluestone Ventures, Inc. | Method and System for Dynamic Estimation and Predictive Route Generation |
| CN107219540A (en) * | 2017-07-18 | 2017-09-29 | 东方点石科技（天津）有限责任公司 | A kind of Beidou satellite navigation system selects star location equipment |
| CN107219791A (en) * | 2017-06-02 | 2017-09-29 | 江苏久正光电有限公司 | A kind of embedded board based on ArmCortex M4 kernels |
| US9971307B1 (en) * | 2017-04-14 | 2018-05-15 | Primax Electronics Ltd. | Electronic watch with function of calling for help |
-
2019
- 2019-06-06 CN CN201910493140.XA patent/CN110133693A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170160095A1 (en) * | 2002-04-10 | 2017-06-08 | Bluestone Ventures, Inc. | Method and System for Dynamic Estimation and Predictive Route Generation |
| CN103592668A (en) * | 2013-08-29 | 2014-02-19 | 柳州天运寰通科技有限公司 | Wrist band type Beidou satellite positioning device |
| US9971307B1 (en) * | 2017-04-14 | 2018-05-15 | Primax Electronics Ltd. | Electronic watch with function of calling for help |
| CN107219791A (en) * | 2017-06-02 | 2017-09-29 | 江苏久正光电有限公司 | A kind of embedded board based on ArmCortex M4 kernels |
| CN107219540A (en) * | 2017-07-18 | 2017-09-29 | 东方点石科技（天津）有限责任公司 | A kind of Beidou satellite navigation system selects star location equipment |
Non-Patent Citations (6)
| Title |
|---|
| 王素珍 等: "《通信原理》", 28 February 2010, 北京邮电大学出版社 * |
| 章坚武 等: "《移动通信实验与实训》", 30 September 2017, 西安电子科技大学出版社 * |
| 胡晨阳: "基于数字图像处理的嵌入式山体滑坡监测系统设计与实现", 《中国优秀硕士学位论文全文数据库 基础科学辑》 * |
| 花睿: "基于嵌入式ARM的无人作业船控制系统研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 赵剡 等: "《高精度卫星导航技术》", 31 May 2016, 北京航空航天大学出版社 * |
| 郭玉珍 等: "《测量数据处理及软件应用》", 31 August 2012, 黄河水利出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108170475A (en) * | 2017-12-21 | 2018-06-15 | 中国船舶重工集团公司第七0七研究所 | A kind of embedded software development method for mobile heading reference equipment |
| CN111221464A (en) * | 2019-12-24 | 2020-06-02 | 太原航空仪表有限公司 | Graphic processing module and method for aeronautical instrument |
| CN115508872A (en) * | 2022-09-27 | 2022-12-23 | 安徽理工大学 | GNSS data acquisition and positioning system based on embedded platform |
| CN115508872B (en) * | 2022-09-27 | 2023-08-25 | 安徽理工大学 | GNSS data acquisition and positioning system based on embedded platform |
| CN115453511A (en) * | 2022-11-09 | 2022-12-09 | 成都四维智慧电子科技有限公司 | Cooperative target accurate distance-fixing method based on millimeter wave radar chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110133693A (en) | Big-dipper satellite positioning terminal and its localization method based on ARM Crotex-M4 and μ CGUI | |
| CN103576168A (en) | Beidou satellite signal simulator and implementation method thereof | |
| CN112733688B (en) | House attribute value prediction method and device, terminal device and computer readable storage medium | |
| Sunehra et al. | Children location monitoring on Google Maps using GPS and GSM Technologies | |
| CN106226786A (en) | A kind of Big Dipper based on Godson location terminal | |
| CN108614283A (en) | A kind of Beidou navigation terminal device for vehicle | |
| CN201057823Y (en) | Automatic positioning tracing schoolbag or backpack | |
| CN106019315A (en) | Embedded mode-based Beidou navigation positioning system | |
| CN103925921A (en) | Assistant locating device and method based on electronic compass and pedometer | |
| CN201266236Y (en) | Time service navigation receiver | |
| Aiping | The design of anti-theft device for vehicle based on GSM | |
| CN203894411U (en) | Special-purpose Beidou navigation remote service terminal for engineering vehicle | |
| CN103487814B (en) | Psamminida based on field intensity orientation/satnav identifies other method for searching and device | |
| CN208209954U (en) | A kind of compact automatically just presents portable satellite station | |
| CN203673262U (en) | A Beidou watch with an integration of a watch ring and an antenna | |
| CN203572963U (en) | GNSS positioning circuit based on ARM processor | |
| CN216900944U (en) | Terminal positioning system and hand-held locator based on GPS, big dipper and GSM | |
| Wang et al. | A new solution to GNSS receiver baseband signal processing SOC platform based on OpenRISC processor | |
| Hu et al. | Design of positioning and sensing network system based on BeiDou | |
| CN205280945U (en) | Double mode integration positioner of GPS big dipper | |
| CN202904645U (en) | A three-dimensional GIS urban planning geographic information system | |
| CN202793404U (en) | Vehicle-mounted GPS (Global Positioning System) device | |
| CN203812421U (en) | English teaching device based on wireless communication | |
| CN2906642Y (en) | Rs232 interface geographical location positioning and displaying apparatus | |
| CN202599423U (en) | Vehicle-mounted big dipper navigation positioning device combined with long-range radio navigation |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190816 |
|
| RJ01 | Rejection of invention patent application after publication |