CN105527633B - One kind is based on the portable Big Dippeves of USB/GPS navigation time service device and method - Google Patents
One kind is based on the portable Big Dippeves of USB/GPS navigation time service device and method Download PDFInfo
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- CN105527633B CN105527633B CN201610030008.1A CN201610030008A CN105527633B CN 105527633 B CN105527633 B CN 105527633B CN 201610030008 A CN201610030008 A CN 201610030008A CN 105527633 B CN105527633 B CN 105527633B
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Classifications
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- 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
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/256—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to timing, e.g. time of week, code phase, timing offset
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention is that one kind is based on the portable Big Dippeves of USB/GPS navigation time service device and method, the device includes the Big Dipper/GPS receiver module, usb protocol modular converter, usb interface module and portable computer, by the Data Format Transform of RS232 agreements into the data format for meeting usb protocol transmission requirement in the usb protocol modular converter, and it is transferred to by USB interface in portable computer, special decoding window is used in portable computer, the navigation informations such as time, position are extracted into display and are supplied to application layer to develop.The present invention use the Big Dipper/gps satellite receiving module, safe and small volume, portable, and USB interface is simple in construction, and required aerial lug is few, and transmission rate is fast, and more accurate, stably development and application data are provided for portable computer.
Description
Technical field
The invention belongs to real-time satellite navigation time service field of locating technology, and in particular to one kind is given using USB transport protocol
Portable computer transmits the device and method of precise time location information.
Background technology
In information-based and digitlization high speed development today, in military weapon positioning, auto navigation and traffic administration, electric power
With the network time synchronization etc. such as communication, the precise method of engineering construction is ensured with the Big Dipper/GPS dual-mode time service positioning
Through obtaining the accreditation of many countries, the Big Dipper/GPS navigation data needs the mode by decoding to extract the information of needs, this
A little information are all the different code streams that satellite is sent before decoding, are received, are transferred in the Big Dipper/GPS chip by antenna, are passed
The decoding process of system is to implement decoding function outside computer by using different microprocessors, this decoding process
Weak point is the increase in engineering cost, and whole system volume can all increase, and reduces the convenience of this system.In science and technology
Found in the heuristic process of work, the Big Dipper/GPS dual-mode time service location information is transmitted for portable to computer using usb protocol
Formula computer is more applicable, is convenient.
Closest prior art is to be delivered by comrades such as the Suzhou Institute of Science and Technology poplar meeting tinkling of pieces of jade in March, 2014 with the present invention
" Big Dipper/GPS dual-mode based on PCI-E is awarded for the 1st 68-70 pages of phase entitled in " Suzhou Institute of Science and Technology journal engineering technology version "
When system design " article, its technical scheme is as shown in Figure 1：Including the Big Dipper/GPS dual-mode time service module 1, B codes decoder module 2,
Dual port RAM module 3, PCI-E bus hardware interfaces module 4 and host computer 5, in the Big Dipper/GPS dual-mode time service module 1 or time
In the case that code IRIG-B inputs to B codes decoder module 2, relevant information in code stream is extracted, then it is hard by PCI-E buses
Part interface module 4 sends host computer 5 to and shown for function, and is used within hardware.
The Big Dipper/subject matter existing for the GPS satellite navigation information transmission system is：The scope of application is limited only to have
The desktop computer of PCI slot, in face of the current information age, portable computer sharply increases, this dependence PCI-E transmission
The system of pattern can not be applied in portable computer, and be decoded using external hardware, and module volume is larger, portable
Property is poor.
The content of the invention
The defects of in order to overcome above-mentioned technology, it is an object of the invention to meet the transmission of the Big Dipper/GPS satellite navigation information
It is required that designing a kind of portable transmission means based on usb protocol for portable computer, and pass through computer application software
The satellite information received to the Big Dipper/GPS dual-mode navigation chip is decoded and shown.
To realize above-mentioned technical purpose and the technique effect, the present invention is achieved through the following technical solutions：
One kind be based on the portable Big Dippeves of USB/GPS navigation time service device, the device including the Big Dipper/GPS dual-mode time service module,
USB interface modular converter and computer decoding module, wherein：
The Big Dipper/GPS dual-mode time service module is configured to receive the electromagnetic wave of satellite transmission and converts thereof into NMEA
The satellite navigation data of agreement；
The data output end of the USB interface modular converter connection Big Dipper/GPS dual-mode time service module, is configured to read
The satellite navigation data form taken is from RS232 protocol conversions into the data for meeting usb protocol；
The computer decoding module by a serial ports receiving module connect USB interface modular converter, be configured to
The satellite navigation data that usb protocol transmits is decoded and is extracted information entrained in code stream.
Further, the USB interface modular converter is connect by RS232 protocol conversion modules, usb protocol modular converter, USB
Mouth mold block and external crystal-controlled oscillation module composition, wherein：
The data output end of the input connection Big Dipper/GPS dual-mode time service module of the RS232 protocol conversion modules, is used
RS232 agreements are connected with the satellite navigation data of RS232 agreements transmission, the input of the usb protocol modular converter in receiving
The output end of modular converter, for the satellite navigation data transmitted with RS232 agreements to be converted into the satellite transmitted with usb protocol
Navigation data, the input of the external crystal-controlled oscillation module connection usb protocol modular converter, for providing reference frequency, the USB
Interface module connects the output port of usb protocol modular converter, for the satellite navigation data transmitted with usb protocol to be transferred to
Computer decoding module.
Further, the Big Dipper/GPS dual-mode time service module uses UM220 chips.
Further, the RS232 protocol conversion modules use MAX232 chips.
Further, the usb protocol modular converter uses PL2303.
One kind is based on the portable Big Dippeves of USB/GPS navigation time service method, satellite navigation data by serial ports receiving module with
Usb protocol carries out serial ports reading data initialization after being transferred to computer decoding module and satellite navigation data is decoded, including
Following steps：
Step 1）Serial ports reads data initialization；
Step 1.1）SetCommport () function setup port, it is with the specified initial port of in class function storehouse function
COM1；
Step 1.2）SetlnputMode () function setup input mode, input data mode are binary form；
Step 1.3）SetSetting () function setup configured transmission, baud rate are set to 9600bps；
Step 1.4）SetOutbuffersize () function setup output buffer, output spatial cache are assigned as 512 words
Section；
Step 1.5）Setlnput () function setup region of acceptance data length, be arranged to no parity check position, 8 data bit, 1
Stop position；
Step 1.6）Setlnbuffersize () function setup input block, input-buffer space are assigned as 1024 words
Section；
Step 2）Satellite navigation data decodes；
Step 2.1）Data are cached after having received data, then differentiate the data selected using $ GPRMC as frame head,
Discriminant approach is whether resulting number framing head symbol is " $ ", if so, the array then to be entered to the judgement of next step, if it is not, then
Give up the array, continue the judgement of this step；
Step 2.2）With comma, " every kind of parameter in array is separated, pass through the number of remembered comma to do foundation, tease
The change of number number is the change of data type, and when counting down to 1, and serial ports receives corresponding numerical value in array and is not this moment
ASCLL codes 0x24, you can determine that time numerical value is placed in inside array, extracted；
Step 2.3）The variable of a CString type is defined, with this variable come the numerical value of storage time, time numerical value
Extract rear logarithm value to be separated, by the hour, minute, the order of second extracted and cached to array successively；
Step 2.4）The resulting time is done into time zone conversion, the Green that will be passed on inside the Big Dipper/GPS dual-mode time service module
The time that Buddhist nun controls time zone is changed into Beijing time, is obtained accurately along with 8 hours on the resulting time after will decoding
Beijing time.
The beneficial effects of the invention are as follows:
The present invention provides reliable satellite navigation using the portability of USB interface and UM220 chips for portable computer
Data, the application layer exploitation to portable computer provide time and the positional information of reasonable accuracy.
Brief description of the drawings
Fig. 1 is the structured flowchart of " Big Dipper based on PCI-E/GPS dual-mode time dissemination system " in the prior art；
Fig. 2 is the hardware block diagram of the present invention；
Fig. 3 is USB interface modular converter structural schematic block diagram in Fig. 2；
Fig. 4 is that serial ports of computers receiving module reads data initialization flow chart；
Fig. 5 is computer decoding module to satellite navigation data decoding process figure.
Label declaration in figure：1st, 6. Big Dippeves/GPS dual-mode time service module, 2.B code decoder modules, 3. dual port RAM modules,
4.PCI-E bus hardware interface modules, 5. host computers, 7.USB interface modular converters, 8. serial ports receiving modules, 9. calculate aircraft window
Mouth display module, 10.RS232 protocol conversion modules, 11.USB protocol conversion modules, 12.GPRMC location informations, 13.USB connect
Mouth mold block, 14. computer decoding modules.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the present invention is described in detail.
Shown in reference picture 2, one kind is based on the portable Big Dippeves of USB/GPS navigation time service device, and the device includes the Big Dipper/GPS
Bimodulus time service module 6, USB interface modular converter 7 and computer decoding module 14, wherein：
The Big Dipper/GPS dual-mode time service module 6 is configured to receive the electromagnetic wave of satellite transmission and converts thereof into NMEA
The satellite navigation data of agreement；
The USB interface modular converter 7 connects the data output end of the Big Dipper/GPS dual-mode time service module 6, be configured to by
The satellite navigation data form of reading is from RS232 protocol conversions into the data for meeting usb protocol；
The computer decoding module 14 connects USB interface modular converter 7 by a serial ports receiving module 8, is configured to
The satellite navigation data transmitted with usb protocol is decoded and is extracted information entrained in code stream；
In the present embodiment, the output end of computer decoding module 14 is connected with computer interface display module 9, for showing
Show the data decoded.
Shown in reference picture 3, the USB interface modular converter 7 is by RS232 protocol conversion modules 10, usb protocol modular converter
11st, usb interface module 12 and external crystal-controlled oscillation module 13 form, wherein：
The data output end of the input connection Big Dipper/GPS dual-mode time service module 6 of the RS232 protocol conversion modules 10,
For receiving the satellite navigation data transmitted with RS232 agreements, the input connection RS232 of the usb protocol modular converter 11
The output end of protocol conversion module 10, transmitted for the satellite navigation data transmitted with RS232 agreements to be converted to usb protocol
Satellite navigation data, the external crystal-controlled oscillation module 13 connects the input of usb protocol modular converter 11, for providing benchmark frequency
Rate, the usb interface module 12 connects the output port of usb protocol modular converter 11, for the satellite that will be transmitted with usb protocol
Navigation data is transferred to computer decoding module 14.
The Big Dipper/GPS dual-mode time service module 6 uses UM220 chips.
The RS232 protocol conversion modules 10 use MAX232 chips.
The usb protocol modular converter 11 uses PL2303.
Shown in reference picture 4 and Fig. 5, one kind is based on the portable Big Dippeves of USB/GPS navigation time service method, and satellite navigation data leads to
Cross serial ports receiving module and be transferred to usb protocol after computer decoding module and carry out serial ports and read data initialization and satellite is led
Data of navigating decoding, comprises the following steps：
Step 1）Serial ports reads data initialization；
Step 1.1）SetCommport () function setup port, it is with the specified initial port of in class function storehouse function
COM1；
Step 1.2）SetlnputMode () function setup input mode, input data mode are binary form；
Step 1.3）SetSetting () function setup configured transmission, baud rate are set to 9600bps；
Step 1.4）SetOutbuffersize () function setup output buffer, output spatial cache are assigned as 512 words
Section；
Step 1.5）Setlnput () function setup region of acceptance data length, be arranged to no parity check position, 8 data bit, 1
Stop position；
Step 1.6）Setlnbuffersize () function setup input block, input-buffer space are assigned as 1024 words
Section；
Step 2）Satellite navigation data decodes；
Step 2.1）Data are cached after having received data, then differentiate the data selected using $ GPRMC as frame head,
Discriminant approach is whether resulting number framing head symbol is " $ ", if so, the array then to be entered to the judgement of next step, if it is not, then
Give up the array, continue the judgement of this step；
Step 2.2）With comma, " every kind of parameter in array is separated, pass through the number of remembered comma to do foundation, tease
The change of number number is the change of data type, and when counting down to 1, and serial ports receives corresponding numerical value in array and is not this moment
ASCLL codes 0x24, you can determine that time numerical value is placed in inside array, extracted；
Step 2.3）The variable of a CString type is defined, with this variable come the numerical value of storage time, time numerical value
Extract rear logarithm value to be separated, by the hour, minute, the order of second extracted and cached to array successively；
Step 2.4）The resulting time is done into time zone conversion, the Green that will be passed on inside the Big Dipper/GPS dual-mode time service module
The time that Buddhist nun controls time zone is changed into Beijing time, is obtained accurately along with 8 hours on the resulting time after will decoding
Beijing time.
The principle of the invention
Outside dual-mode antenna and satellite bimodulus navigation time service chip UM220（That is the Big Dipper/GPS dual-mode time service module 6）It is connected
Connect, the receiving terminal of the Big Dipper/GPS dual-mode time service module 6 receives the electromagnetic wave of satellite transmission by antenna, is converted into electric signal and passes through
Wire transmission after treatment, can be read from the COM port or COM device or COM1 of UM220 chips on module port and meet that the satellite of NMEA agreements is led
Boat data；Need to be changed data format after reading data, the data on minimum system plate simply meet RS232 agreements
Data flow, it is necessary to which usb protocol modular converter 11 carries out protocol conversion, by bit stream to RS232 agreements on UM220 system boards
On modular converter 10, then the output port of RS232 protocol conversion modules 10 is connected on usb protocol modular converter 11, data
After protocol conversion, a usb interface module 12 will be connected on the output port of usb protocol modular converter 11.Use usb interface module
Satellite navigation information is transferred in computer and processed by 12.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (5)
1. one kind is based on the portable Big Dippeves of USB/GPS navigation time service device, it is characterised in that the device includes the Big Dipper/GPS dual-mode
Time service module（6）, USB interface modular converter（7）With computer decoding module（14）, wherein：
The Big Dipper/GPS dual-mode time service module（6）It is configured to receive the electromagnetic wave of satellite transmission and converts thereof into NMEA associations
The satellite navigation data of view；
The USB interface modular converter（7）Connect the Big Dipper/GPS dual-mode time service module（6）Data output end, be configured to by
The satellite navigation data form of reading is from RS232 protocol conversions into the data for meeting usb protocol；
The computer decoding module（14）Pass through a serial ports receiving module（8）Connect USB interface modular converter（7）, configuration use
Decoded in the satellite navigation data to being transmitted with usb protocol and extracted information entrained in code stream；
The satellite navigation data carries out serial ports reading after being transferred to computer decoding module by serial ports receiving module with usb protocol
Take data initialization and satellite navigation data is decoded, comprise the following steps：
Step 1）Serial ports reads data initialization；
Step 1.1）SetCommport () function setup port, it is COM1 to specify initial port with class function storehouse function；
Step 1.2）SetlnputMode () function setup input mode, input data mode are binary form；
Step 1.3）SetSetting () function setup configured transmission, baud rate are set to 9600bps；
Step 1.4）SetOutbuffersize () function setup output buffer, output spatial cache are assigned as 512 bytes；
Step 1.5）Setlnput () function setup region of acceptance data length, it is arranged to no parity check position, 8 data bit, 1 stopping
Position；
Step 1.6）Setlnbuffersize () function setup input block, input-buffer space are assigned as 1024 bytes；
Step 2）Satellite navigation data decodes；
Step 2.1）Data are cached after having received data, the data selected using $ GPRMC as frame head is then differentiated, differentiates
Mode is whether resulting number framing head symbol is " $ ", if so, the array then to be entered to the judgement of next step, if it is not, then giving up
The array, continue the judgement of this step；
Step 2.2）With comma, " every kind of parameter in array is separated, pass through the number of remembered comma to do foundation, comma
Several changes is the change of data type, and when counting down to 1, and corresponding numerical value is not in the array of serial ports reception this moment
ASCLL codes 0x24, you can determine that time numerical value is placed in inside array, extracted；
Step 2.3）The variable of a CString type is defined, with this variable come the numerical value of storage time, the extraction of time numerical value
Logarithm value is separated after out, and by the hour, minute, the order of second extracted and cached to array successively；
Step 2.4）The resulting time is done into time zone conversion, the Greenwich that will be passed on inside the Big Dipper/GPS dual-mode time service module
The time in time zone is changed into Beijing time, and accurate Beijing is obtained along with 8 hours on the resulting time after will decoding
Time.
2. according to claim 1 be based on the portable Big Dippeves of USB/GPS navigation time service device, it is characterised in that the USB
Interface modular converter（7）By RS232 protocol conversion modules（10）, usb protocol modular converter（11）, usb interface module（12）With
External crystal-controlled oscillation module（13）Composition, wherein：
The RS232 protocol conversion modules（10）Input connection the Big Dipper/GPS dual-mode time service module（6）Data output end,
For receiving the satellite navigation data transmitted with RS232 agreements, the usb protocol modular converter（11）Input connection
RS232 protocol conversion modules（10）Output end, for the satellite navigation data transmitted with RS232 agreements to be converted to USB
The satellite navigation data of agreement transmission, the external crystal-controlled oscillation module（13）Connect usb protocol modular converter（11）Input, use
In offer reference frequency, the usb interface module（12）Connect usb protocol modular converter（11）Output port, for will be with
The satellite navigation data of usb protocol transmission is transferred to computer decoding module（14）.
3. according to claim 1 be based on the portable Big Dippeves of USB/GPS navigation time service device, it is characterised in that the north
Bucket/GPS dual-mode time service module（6）Using UM220 chips.
4. according to claim 2 be based on the portable Big Dippeves of USB/GPS navigation time service device, it is characterised in that described
RS232 protocol conversion modules（10）Using MAX232 chips.
5. according to claim 2 be based on the portable Big Dippeves of USB/GPS navigation time service device, it is characterised in that the USB
Protocol conversion module（11）Using PL2303.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610030008.1A CN105527633B (en) | 2016-01-18 | 2016-01-18 | One kind is based on the portable Big Dippeves of USB/GPS navigation time service device and method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106095704A (en) * | 2016-08-05 | 2016-11-09 | 江苏星宇芯联电子科技有限公司 | A kind of Multifunctional adapting box supporting USB OTG pattern |
| CN107942361A (en) * | 2017-11-28 | 2018-04-20 | 安徽天立泰科技股份有限公司 | Big Dipper positioning and communicating portable terminal device system |
| CN108375898B (en) * | 2018-03-15 | 2023-04-14 | 福建师范大学 | Computer high-precision time service control method |
| CN108873041A (en) * | 2018-05-10 | 2018-11-23 | 芜湖航飞科技股份有限公司 | A kind of aviation positioning device based on Beidou navigation technology |
| CN113114346B (en) * | 2021-06-11 | 2021-08-31 | 飞天诚信科技股份有限公司 | Method and device for synchronizing time by analyzing satellite navigation data |
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