CN105955013B - Portable big-dipper satellite time service equipment - Google Patents
Portable big-dipper satellite time service equipment Download PDFInfo
- Publication number
- CN105955013B CN105955013B CN201610427550.0A CN201610427550A CN105955013B CN 105955013 B CN105955013 B CN 105955013B CN 201610427550 A CN201610427550 A CN 201610427550A CN 105955013 B CN105955013 B CN 105955013B
- Authority
- CN
- China
- Prior art keywords
- module
- big dipper
- interface
- big
- input
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention relates to a kind of portable big-dipper satellite time service equipments, including Beidou antenna module, Big Dipper message processing module, interface modular converter, power module and the interface module being assemblied in USB flash disk formula shell cavity, Beidou antenna module is for receiving Big Dipper satellite signal, the output of Beidou antenna module is connected to the input terminal of Big Dipper message processing module, the input/output end of Big Dipper message processing module passes to the input/output terminal of interface module through interface modular converter, and interface module realizes the connection with user equipment.Compared with prior art, the present invention has the characteristics that high integration, pocket, interface generality and super low-power consumption, high-precision, micromation, improves timing equipment application range, reduces use cost, improves the suitability with used time equipment.
Description
Technical field
The content of present invention belongs to satellite navigation application apparatus technical field, is related to a kind of portable big-dipper satellite time service and sets
It is standby.
Background technology
Beidou satellite navigation system is the Global Satellite Navigation System that China voluntarily develops, the system on December 27th, 2012
It rises and formally provides passive location, navigation, time service service to the Asian-Pacific area.With the development of Beidou satellite navigation technology, the Big Dipper is whole
End equipment also to multi-functional, high-precision, develop by the directions such as highly integrated, has been widely used in hydrology change, and fishing boat monitoring is gloomy
The fields such as woods fire prevention.
Existing big-dipper satellite time service equipment mainly has Big Dipper timing type subscriber computer, Big Dipper indicating clock currently on the market
It is that satellite-signal is received by antenna Deng, operation principle, radio frequency baseband processing module solves the satellite ephemeris received
It calculates, finally exports the temporal information calculated by serial ports.It is current all kinds of in the market however, in the actual use environment
Time service type product shows more disadvantage and inconvenience, and the major defect concluded during use is as follows：1) traditional time service class
Equipment volume is larger, takes split-type design, is connected by RF cable between antenna and host, in use and installation
It needs to carry out using special place, carrier (such as fixed cabinet) and tool, cannot be satisfied burst scene or fast reserve ring
Time service demand under border；2) it interconnects in mode with external device, existing equipment need to use serial communication form to carry out, and lead to
Cross the connection of serial ports cable, it is desirable that must have serial ports using equipment, cannot dock and interact with other equipment, have one to use environment
Fixed limitation cannot meet the needs of equipment is with satellite time synchronization work in the environment such as fast reserve；3) existing equipment
Power consumption it is larger, subscriber computer power consumption be tens watts, need high-power battery or powered by direct current, be not suitable with field time service.
Invention content
It is an object of the invention to be solved to problem of the existing technology, provide it is a kind of it is reasonable for structure, low in energy consumption,
It is small, easy to carry, timing tracking accuracy is high, can directly be connected with general information equipment, to realize quick time service
The portable big-dipper satellite time service equipment of function, also the defending party to the application is referred to as " Big Dipper time service V disks " to the big-dipper satellite time service equipment.
The technical solution used for achieving the above object is as follows：
A kind of portable big-dipper satellite time service equipment includes a Portable U disc formula shell cavity and assembly with fastening lid
Beidou antenna module, Big Dipper message processing module, interface modular converter, power module and interface mould in USB flash disk formula shell cavity
Block, for Beidou antenna module for receiving Big Dipper satellite signal, the output of Beidou antenna module is connected to Big Dipper message processing module
Input terminal, the input/output end of Big Dipper message processing module passes to the input/output of interface module through interface modular converter
End, interface module realize with the connection of user equipment, power module be used for Big Dipper Anneta module, Big Dipper message processing module and
Interface modular converter provides working power.
In above-mentioned portable big-dipper satellite time service equipment, Big Dipper message processing module is by Big Dipper chip and arm processor
(ARM chips) forms, and after Big Dipper chip receives the output signal of Beidou antenna module, input/output end passes to arm processor
Input/output terminal, the input/output end of arm processor passes to the input/output terminal of interface module through interface modular converter.
In above-mentioned portable big-dipper satellite time service equipment, Big Dipper chip is by radio-frequency channel circuit, baseband signal processing circuit
With navigation information processing circuit composition, the input terminal of radio-frequency channel circuit is used to receive the output signal of Beidou antenna module, penetrates
The output end of frequency channel circuit is followed by through baseband signal processing circuit to navigation information handling the input terminal of circuit, at baseband signal
The output end of the ARM signal input parts and arm processor of managing circuit connects.
In above-mentioned portable big-dipper satellite time service equipment, Big Dipper chip uses the device of model T305, arm processor to adopt
With the device of model STM32F207.
In above-mentioned portable big-dipper satellite time service equipment, Beidou antenna module uses ceramic material, model Z-STAR
The device of (12*12) B1/L1.
In above-mentioned portable big-dipper satellite time service equipment, interface modular converter converts core using the USB of model CH340T
Piece.
In above-mentioned portable big-dipper satellite time service equipment, interface module uses the device of model USB2.0 (A types female seat).
In above-mentioned portable big-dipper satellite time service equipment, power module uses the device of model LT1963EST.
There is high integration according to the portable big-dipper satellite time service equipment of above-mentioned technical proposal design, pocket, connect
The characteristics of mouthful versatility and super low-power consumption, high-precision, micromation, improve timing equipment application range, reduce use at
This, improves the suitability with used time equipment.Compared with time service equipment traditional at present, main advantage of the invention is：
One, high integration, integration, miniaturized design
Traditional big-dipper satellite time service equipment composition includes mainly antenna, cable, host, peripheral hardware cable etc., and system connection is multiple
It is miscellaneous, volume is larger, be not suitable in the field environment quickly to portable device carry out time service.For this problem, the present invention adopts
Being miniaturized of equipment, integration, portability are realized with the time service chip of high integration, improve the scope of application.Wherein, Big Dipper day
Wire module is designed using ceramic material, under the premise of appearance miniaturized structure, ensures more preferably receptivity；Big Dipper information processing
Module adds the combination of arm processor (ARM chips) using Big Dipper chip, has not only ensured the excellent function of complete machine, performance, but also ensures to set
It is standby to have powerful information processing capability；Interface modular converter turns USB interface conversion core using more stable, reliable serial ports
Piece so that equipment is suitable for more carriers and uses.
Two, USB inserts i.e. time service design
The cable of traditional big-dipper satellite time service equipment connects complicated, generally use serial ports output time signal.Mainstream at present
The equipment such as countryside portable computer are not equipped with serial ports, are not suitable with tradition Timing Receiver.To increase the available of time service equipment
Property, the present invention is provided with integration USB conversion chip, the rs 232 serial interface signal exported inside equipment is directly converted to usb signal, for tool
There is the use of the general informations equipment such as portable computer of USB interface, in this way promotes traditional serial communication mode to USB
Communication level supports hot plug, plug and play to realize quick timing function, improve the versatility and convenience of equipment.
Three, low power dissipation design
Traditional big-dipper satellite time service equipment power consumption is tens watts, and when work needs high-power battery or powered by direct current,
It is not suitable with field time service.The power consumption of product of the present invention is only tens milliwatts, using USB power supply can normal use, saved electricity
Can, it improves field and uses ability and adaptability.
Four, low-cost design
Traditional Big Dipper time service subscriber computer is differed according to precision difference, RMB cost from tens of thousands of members to ten tens of thousands of yuan.This
Time service chip of the invention product based on high integration carries out integrated design, by Beidou antenna module, Big Dipper message processing module,
Interface module etc. is integrated in the equipment of similar USB flash disk size, is designed using chip, is substantially reduced equipment volume and have
Effect reduces cost (reduction amplitude reaches 10 times or more), and time service application charges are also greatly saved.
Description of the drawings
Fig. 1 is the complete machine structure figure of the present invention；
Fig. 2 is that the module of the present invention couples block diagram；
Fig. 3 is the signal flow graph of the present invention；
Fig. 4 is the aerial signal flow chart of the present invention；
Fig. 5 is the radio-frequency module signal flow graph of the present invention；
Fig. 6 is the base-band information processing module signal flow graph of the present invention；
Fig. 7 is that the navigation information of the present invention handles module by signal process chart.
Each numeral mark is entitled in figure：1- Beidou antenna modules；2- Big Dipper message processing modules, 21- Big Dipper cores
Piece, the radio-frequency channels 211- circuit, 212- baseband signal processing circuits, 213- navigation informations handle circuit；22-ARM processing
Device (ARM chips)；3- interface modular converters；4- power modules；5- interface modules；6-U disc type shell cavitys.
Specific implementation mode
As depicted in figs. 1 and 2, portable big-dipper satellite time service equipment of the present invention includes being assemblied in USB flash disk formula shell chamber
Beidou antenna module 1, Big Dipper message processing module 2, interface modular converter 3, power module 4 in body and interface module 5, the Big Dipper
For Anneta module 1 for receiving Big Dipper satellite signal, the output of Beidou antenna module 1 is connected to the defeated of Big Dipper message processing module 2
Entering end, the input/output end of Big Dipper message processing module 2 passes to the input/output terminal of interface module 5 through interface modular converter 3,
Interface module 5 realizes that the connection with user equipment, power module 4 are used for Big Dipper Anneta module 1, Big Dipper message processing module 2
Working power is provided with interface modular converter 3.
In above-mentioned time service equipment, Big Dipper message processing module 2 is by 22 groups of Big Dipper chip 21 and arm processor (ARM chips)
At after Big Dipper chip 21 receives the output signal of Beidou antenna module 1, input/output end passes to the defeated of arm processor 22
Enter/output end, the input/output end of arm processor 22 passes to the input/output terminal of interface module 5 through interface modular converter 3..
2 further composed structure of Big Dipper message processing module as shown in figure 3, Big Dipper chip therein 21 by radio-frequency channel
Circuit 211, baseband signal processing circuit 212 and navigation information processing circuit 213 form, the input terminal of radio-frequency channel circuit 211
Output signal for receiving Beidou antenna module, the output end of radio-frequency channel circuit 211 is after baseband signal processing circuit 212
It is connected to the input terminal of navigation information processing circuit 213, the ARM signal input parts and arm processor of baseband signal processing circuit 212
22 output end connection.
In concrete structure setting of the present invention, Beidou antenna module 1 uses the model Z-STAR (12*12) of ceramic material
The device of B1/L1；Big Dipper message processing module 2 includes Big Dipper chip 21 and arm processor (ARM chips) 22, wherein Big Dipper core
Piece 21 is using the device of model T305, and Big Dipper chip 21 is mainly for the treatment of radiofrequency signal, extracting time information in work；
Arm processor 22 uses the device of model STM32F207, for controlling data flow；Interface modular converter 3 is used for realizing serial ports
Temporal information is converted to USB temporal informations, and the USB conversion chips of model CH340T can be used；Power module 4 uses model
The device of LT1963EST；Interface module 5 is set using the device of model USB2.0 (A types female seat) for realizing with user the used time
Standby connection.
The groundwork flow of the present invention is as follows：Beidou antenna module 1 receives Big Dipper satellite signal, by signal power into
After row amplification, Big Dipper message processing module 2 is given, Big Dipper message processing module 2 completes signal, the processing of information, resolving, and presses
Temporal information is exported according to standard agreement, the temporal information of output is converted to original serial port protocol through interface modular converter 3
Usb protocol, and exported outward by interface module 5.Power module 4 provides power supply support for all modules of complete machine, will be external defeated
After the 5V power supplys entered are converted to 3.3V, it is supplied to interface modular converter and message processing module.
The specific workflow of the present invention referring to Fig. 4-Fig. 7, subscriber computer antenna receive No. two satellites of the Big Dipper (including B1 and
B3 frequency points) on the RNSS navigation signals broadcast, after pre-filtering, low noise amplification, down coversion, intermediate frequency filtering and the amplification
To analog intermediate frequency signal.Corresponding intermediate-freuqncy signal can be expressed from the next：
Wherein, AcIndicate the common ranging code amplitude for being modulated to B1 or B3 frequency point carrier waves, ApExpression is modulated to B1 or B3 frequency points
The precision code amplitude of carrier wave, C (t) indicate that common ranging code, P (t) indicate precision code, Dc(t) common ranging is indicated
The data modulated on code, Dp(t) data modulated on precision code, f are indicatedoIndicate IF carrier frequency, fdIndicate Doppler
Frequency displacement,Indicate the IF carrier first phase of common ranging code,Indicate that the IF carrier first phase of precision code, n (t) indicate high
This white noise.
Above-mentioned signal is converted into digital signal by A/D Sampling devices, in the baseband signal processing unit point of receiver according to
CDMA carries out digital channel division, and is de-spread, demodulated respectively.If sampling signal first with local pseudo-code signal C
(t- τ) and local carrier signalMultiplying processing is carried out, is obtained：
It filters out with after frequency component, obtains：
When local carrier signal frequency and phase in above-mentioned signal carrier frequency and phase reach consistent, i.e. f=
fo+fd,And the common ranging code that ought locally generate realizes phase alignment with the common ranging code in above-mentioned signal
When, i.e. τ=0, c (t) c (t- τ)=1 can get local signal and maximal correlation of the above-mentioned signal about common ranging code,
To form correlation magnitude peak.
Under the tracking mode of pseudo-code, local pseudo-random sequence will be synchronous with sequence phase is received, then will it is local pseudo- with
Machine sequence transformation reads this pulse at the pulse (such as frame synchronization head) for being convenient for time measurement on the time shaft of user local
It counts, while interpreting the emission time of the pulse from text, time difference τ between the two just arrives satellite corresponding to user
Pseudorange ρ, so-called pseudorange, which can be understood as, to be same dimension with distance and includes range information, but is not distance merely
Physical measuring quantity.Specifically mathematical definition is：
ρ=r+ Δs r (4)
In formula, r is true distance, Δ r be introduced by various factors be deterministic or randomness away from
From distortion.For example, common Δ r can consider including the clock correction Δ t between user and satellitesu, the ionosphere of satellite-signal is prolonged
When, troposphere delay, measure thermal noise etc..The factor of consideration is more, and model is more accurate, and positioning accuracy is higher.
Receiver receives the pseudorange of four or more satellites, and can (such as poor Modifying model, double frequency are repaiied with certain means
Just etc.) propagation delay of pseudorange is corrected, then user can obtain following measurement equation group：
(x, y, z) therein is the position of user, (xsi,ysi,zsi) be i-th satellite position, can pass through demodulate number
It is obtained in the navigation message included in.
There is above-mentioned observational equation that can resolve the clock correction Δ for obtaining the position (x, y, z) and satellite and user of user
T, Δ t are the time difference of user time and satellite standard time.The method of resolving has least-squares algorithm and Kalman filtering to calculate
Method, wherein Kalman filtering algorithm have higher noise inhibiting ability.
The information such as the time that Big Dipper information processing chip obtains can convert usb interface module by serial ports and provide user,
Can also temporal information be subjected to storage record, be convenient for subsequent processing and assessment of performance.
Claims (3)
1. a kind of portable big-dipper satellite time service equipment, it is characterised in that：The Portable U disc formula shell chamber for carrying fastening lid including one
Body (6) and the Beidou antenna module (1) being assemblied in USB flash disk formula shell cavity (6), Big Dipper message processing module (2), interface conversion mould
Block (3), power module (4) and interface module (5), Beidou antenna module (1) is for receiving Big Dipper satellite signal, Beidou antenna mould
The output of block (1) is connected to the input terminal of Big Dipper message processing module (2), the input/output end of Big Dipper message processing module (2)
The input/output terminal of interface module (5) is passed to through interface modular converter (3), interface module (5) realizes the company with user equipment
It connects, power module (4) is used to provide to Big Dipper Anneta module (1), Big Dipper message processing module (2) and interface modular converter (3)
Working power；The Big Dipper message processing module (2) is made of Big Dipper chip (21) and arm processor (22), Big Dipper chip
(21) after the output signal for receiving Beidou antenna module (1), input/output end passes to the input/output of arm processor (22)
End, the input/output end of arm processor (22) passes to the input/output terminal of interface module (5) through interface modular converter (3).
2. portable big-dipper satellite time service equipment according to claim 1, it is characterised in that：Big Dipper chip (21) is by radio frequency
Channel circuit (211), baseband signal processing circuit (212) and navigation information processing circuit (213) form, radio-frequency channel circuit
(211) input terminal is used to receive the output signal of Beidou antenna module (1), and the output end of radio-frequency channel circuit (211) is through base
Band signal processing circuit (212) is followed by the input terminal of navigation information processing circuit (213), baseband signal processing circuit (212)
ARM signal input parts connect with the output end of arm processor (22).
3. portable big-dipper satellite time service equipment according to claim 1, it is characterised in that：Big Dipper chip (21) uses type
Number be T305 device, arm processor (22) use model STM32F207 device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427550.0A CN105955013B (en) | 2016-06-16 | 2016-06-16 | Portable big-dipper satellite time service equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427550.0A CN105955013B (en) | 2016-06-16 | 2016-06-16 | Portable big-dipper satellite time service equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105955013A CN105955013A (en) | 2016-09-21 |
| CN105955013B true CN105955013B (en) | 2018-08-24 |
Family
ID=56907261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610427550.0A Active CN105955013B (en) | 2016-06-16 | 2016-06-16 | Portable big-dipper satellite time service equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105955013B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107529629A (en) * | 2017-09-25 | 2018-01-02 | 西安康帕斯电子科技有限公司 | Big Dipper indicating clock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558828A (en) * | 2013-11-08 | 2014-02-05 | 北京四方继保自动化股份有限公司 | Ship collectivizing supervisory system based on mobile communication and satellite positioning |
| CN103926593A (en) * | 2014-04-25 | 2014-07-16 | 株洲时代日望信息科技有限公司 | Big Dipper positioning and communication integrated terminal based on locomotive security |
| CN204515362U (en) * | 2015-03-16 | 2015-07-29 | 江苏北斗卫星应用产业研究院有限公司 | Beidou II/GPS dual-mode tight coupling time service module |
| CN105511371A (en) * | 2016-02-26 | 2016-04-20 | 电卫士智能电器（北京）有限公司 | Programmable logic controller and control system thereof |
| CN205691957U (en) * | 2016-06-16 | 2016-11-16 | 西安航光卫星测控技术有限公司 | Portable big-dipper satellite time service equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006208006A (en) * | 2003-04-14 | 2006-08-10 | Nec Corp | Ultra-low power consumption communication module using clock, communication system, its power consumption reduction method |
-
2016
- 2016-06-16 CN CN201610427550.0A patent/CN105955013B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558828A (en) * | 2013-11-08 | 2014-02-05 | 北京四方继保自动化股份有限公司 | Ship collectivizing supervisory system based on mobile communication and satellite positioning |
| CN103926593A (en) * | 2014-04-25 | 2014-07-16 | 株洲时代日望信息科技有限公司 | Big Dipper positioning and communication integrated terminal based on locomotive security |
| CN204515362U (en) * | 2015-03-16 | 2015-07-29 | 江苏北斗卫星应用产业研究院有限公司 | Beidou II/GPS dual-mode tight coupling time service module |
| CN105511371A (en) * | 2016-02-26 | 2016-04-20 | 电卫士智能电器（北京）有限公司 | Programmable logic controller and control system thereof |
| CN205691957U (en) * | 2016-06-16 | 2016-11-16 | 西安航光卫星测控技术有限公司 | Portable big-dipper satellite time service equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105955013A (en) | 2016-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105093247A (en) | BeiDou based ground-based navigation signal networking system | |
| CN201707440U (en) | High-dynamic GNSS multimode satellite navigation receiver integrated module device | |
| CN103327450B (en) | Centralized calculation GPS receiver and localization method thereof based on mobile communications network | |
| CN107153207A (en) | Beidou satellite navigation receiver | |
| US20230258825A1 (en) | Satellite signal processing method and satellite positioning apparatus | |
| CN203351756U (en) | Communication antenna system | |
| CN103018760B (en) | Tri-mode positioning and navigation system based on BD-1 (Beidou-1)/BD-2 (Beidou-2)/GPS (global position system) | |
| CN105955013B (en) | Portable big-dipper satellite time service equipment | |
| CN207396745U (en) | A kind of double antenna high dynamic gnss receivers | |
| CN212275985U (en) | Low-power-consumption sub-meter-level communication navigation positioning device based on narrowband Internet of things | |
| CN205691957U (en) | Portable big-dipper satellite time service equipment | |
| CN113238255A (en) | Satellite navigation signal receiving system | |
| CN109116380A (en) | A kind of GNSS receiver, positioning system and method based on GNSS receiver | |
| CN203191541U (en) | Novel portable electronic tracking and positioning system | |
| CN105242290A (en) | Beidou miniaturized transceiver | |
| CN104320156B (en) | Impulse radio ultra wide band module | |
| CN206684303U (en) | A kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks | |
| CN203352573U (en) | Communication antenna | |
| CN202421501U (en) | Handheld geographic information system (GIS) receiver | |
| CN206235741U (en) | A kind of portable navigation positioning terminal and smart mobile phone for strengthening mobile phone positioning precision | |
| CN207782883U (en) | A kind of Big Dipper/GPS dual mode satellite orientation and communication mobile phones | |
| CN208621761U (en) | A kind of pigeon based on MT2503 chip positions circuit and pigeon Real Time Localizer in real time | |
| CN208588827U (en) | A kind of non real-time positioning circuit of the pigeon based on MT2503 chip and the non real-time locator of pigeon | |
| CN203632662U (en) | Accurate underground coal mine range measuring device based on spread spectrum technique | |
| CN206314005U (en) | A kind of integrated circuit modules and electronic equipment with 2G communications with positioning function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |