CN204374419U - Differential reference station, satellite navigation ground - Google Patents
Differential reference station, satellite navigation ground Download PDFInfo
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- CN204374419U CN204374419U CN201520026648.6U CN201520026648U CN204374419U CN 204374419 U CN204374419 U CN 204374419U CN 201520026648 U CN201520026648 U CN 201520026648U CN 204374419 U CN204374419 U CN 204374419U
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Abstract
The utility model discloses differential reference station, a kind of satellite navigation ground, the technical matters that solve reduces the complexity of base station construction, improves the processing power of differential reference system.The utility model is by the following technical solutions: differential reference station, a kind of satellite navigation ground, is provided with base station, and described base station and long-range data processing centre (DPC) network.The utility model compared with prior art, the complexity that effective reduction base station is built, can build a station under the terrain environment of complexity, heart settling signal process in data handling, by the computing power that high in the clouds is powerful, obtain more high-precision observation data and differential correcting data, thus improve the treatment effeciency of satellite navigation ground differential reference station construction efficiency and differential correcting data.
Description
Technical field
The utility model relates to a kind of satellite navigation equipment for user, particularly differential reference station, a kind of satellite navigation ground.
Background technology
Differential reference station, satellite navigation ground is the important component part of high precision satellite navigation and location system, the high-precision difference provided by means of differential reference station, satellite navigation ground corrects data, and the real time dynamic differential locator meams based on satellite navigation can obtain the centimetre-sized even positioning precision of inferior centimeter order.The fixing high precision satellite navigation receiver in the employing position, differential reference station, satellite navigation ground of prior art, as base station, by obtaining differential correcting data to the Continuous Tracking of satellite-signal, and is sent to rover station and completes Differential positioning.Because high precision satellite navigation receiver volume is comparatively large, power consumption is serious, proposes high requirement to the construction of base station and addressing, and inadequate by the processing power of base station hardware resource restriction differential reference system.
Summary of the invention
The purpose of this utility model is to provide differential reference station, a kind of satellite navigation ground, and the technical matters that solve reduces the complexity of base station construction, improves the processing power of differential reference system.
The utility model is by the following technical solutions: differential reference station, a kind of satellite navigation ground, is provided with base station, and described base station and long-range data processing centre (DPC) network.
Base station of the present utility model is networked through fiber optic network and data processing centre (DPC).
Base station of the present utility model is provided with antenna, and antenna is connected with radio-frequency (RF) acquisition device.
Radio-frequency (RF) acquisition device of the present utility model is made up of the wave filter be linked in sequence, RF mixer, digital to analog converter, frequency mixer, buffer and network communication controller.
Data processing centre (DPC) of the present utility model is provided with high in the clouds and resolves server and high in the clouds data server, described radio-frequency (RF) acquisition device resolves server through fiber optic network and high in the clouds and is connected, the continuous print high-precision difference reduction data that server process obtains are resolved in high in the clouds, transfer to high in the clouds data server and store.
Network communication controller of the present utility model resolves server through fiber optic network and high in the clouds and is connected.
Data processing centre (DPC) of the present utility model and rover station are networked.
Data processing centre (DPC) of the present utility model and rover station adopt data network to network.
High in the clouds of the present utility model data server and rover station adopt data network to network.
Base station of the present utility model is at least one, and rover station is at least one.
The utility model compared with prior art, radio-frequency (RF) acquisition device and data processing centre (DPC) is adopted to replace base station process satellite navigation signals, obtain high-precision difference reduction, the volume of radio-frequency (RF) acquisition device is little, low in energy consumption, effectively can reduce the complexity that base station is built, can build a station under the terrain environment of complexity, heart settling signal process in data handling, by the computing power that high in the clouds is powerful, obtain more high-precision observation data and differential correcting data, thus improve the treatment effeciency of satellite navigation ground differential reference station construction efficiency and differential correcting data.
Accompanying drawing explanation
Fig. 1 is the structured flowchart at differential reference station, satellite navigation ground of the present utility model.
Fig. 2 is the structured flowchart of radio-frequency (RF) acquisition device of the present utility model.
Fig. 3 is differential reference station, satellite navigation ground of the present invention cut-away view.
Fig. 4 is that server workflow diagram is resolved in high in the clouds of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Differential reference station, satellite navigation ground of the present utility model, utilizes the data processing centre (DPC) in radio-frequency (RF) acquisition device and high in the clouds that process satellite navigation signals and high-precision difference are corrected data calculation process and transfers to data processing centre (DPC) (high in the clouds) realization.
As shown in Figure 1, differential reference station, satellite navigation ground of the present utility model, be provided with at least one base station, base station is networked through fiber optic network and data processing centre (DPC) (high in the clouds), and data processing centre (DPC) and at least one rover station adopt data network to network.Base station be arranged on broad view and exact position known build a station a little, data processing centre (DPC) is arranged on the control center in remote equipment room, and rover station is the position (customer location) that required mapping is measured.
Base station is provided with antenna, and antenna is connected with radio-frequency (RF) acquisition device, and antenna receives the radio frequency satellite navigation signals that Navsat wireless transmission is come, and radio frequency satellite navigation signals is converted to digital intermediate frequency sampling signal so that record is preserved by radio-frequency (RF) acquisition device.
Data processing centre (DPC) is provided with high in the clouds and resolves server and high in the clouds data server.Digital intermediate frequency sampling Signal transmissions is resolved server to high in the clouds through fiber optic network by radio-frequency (RF) acquisition device.High in the clouds is resolved after server receives digital intermediate frequency sampling signal, treated acquisition continuous print high-precision difference reduction data, cable-network transmission is used to preserve to high in the clouds data server, high in the clouds data server stores continuous print high-precision difference reduction data, and by Ntrip protocol format, continuous print high-precision difference reduction data is sent to rover station by data network.
Rover station receives after continuous print high-precision difference reduction data through data network, use real-time kinetic-control system RTK (Real-time kinematic) fair copy rover station in the Pseudo-range Observations of satellite navigation signals because of the margin of error that atmospheric propagation delay and satellite clock drift cause, complete location, thus realize high-precision difference location.
As shown in Figure 2, radio-frequency (RF) acquisition device is made up of the wave filter be linked in sequence, RF mixer, digital to analog converter, frequency mixer, buffer and network communication controller.After the radio frequency satellite navigation signals sent from Navsat is received by antenna, through wave filter filter out-band external noise, downloaded by RF mixer and be converted to 16.38MHz intermediate frequency, digital to analog converter is sampled and is converted into digital intermediate frequency sampling signal, base band is downconverted to via intermediate frequency mixer (frequency mixer), and deliver to buffer buffer memory, under the control of network communication controller through fiber optic network to data processing centre's transmission of digital if sampling signal.
As shown in Figure 3, differential reference station, satellite navigation ground of the present utility model, mixer module, buffer module and network communication controller module is provided with in base station, resolve beyond the clouds in server and be provided with high-precision difference data and resolve processing module, be provided with data memory module, Data dissemination module and User Access Module beyond the clouds in data server, in rover station, be provided with data reception module and high-precision difference locating module.
Mixer module receives the digital intermediate frequency sampling signal that digital to analog converter exports, and is mixed to base band, and the base-band digital if sampling signal after mixing is sent to buffer module, be sent to network communication controller module after buffer module buffer memory.
The base-band digital if sampling signal that buffer module receiving mixer module exports, buffer memory, to mate sampling rate and the fiber optic network transfer rate of mixer module output, form buffered signal by sample time order arrangement, and send buffered signal to network communication controller module.
After the buffered signal that network communication controller module reception buffer module is sent, read base-band digital if sampling signal, the data transmission package of length 8192 byte is packaged as by the data layout received, to realize the error free transmission in fiber optic network, complete data packing (compression) and transmission control work, the base-band digital if sampling signal after packing is transferred to high-precision difference data by fiber optic network and resolves processing module.
High-precision difference data resolve the base-band digital if sampling signal that processing module receives packing, obtain continuous print high-precision difference reduction data, be sent to data memory module after decompression processing.
As shown in Figure 4, high-precision difference data resolve processing module to after the base-band digital if sampling signal decompress(ion) of packing, process, comprise the following steps:
One, in base-band digital if sampling signal, by the sequential search visible satellite signal departing from centre frequency-10kHz to+10kHz, the initial value of the carrier phase of visible satellite signal, carrier Doppler frequency, ranging code phase place and signal carrier-to-noise ratio is obtained.
In the present embodiment, centre frequency is 1575.24MHz, 1227.60MHz, 1561.098MHz and/or 1207.14MHz, and visible satellite is gps satellite and Beidou II satellite, and visible satellite signal is GPS L1/L2 signal and Beidou II B1/B2 signal.
If do not search visible satellite signal, keep performing step one, search visible satellite signal.
Two, in the digital intermediate frequency sampling signal of the visible satellite signal received, follow the tracks of visible satellite signal, follow the tracks of by the observed quantity of the carrier phase of 20Hz frequency acquisition from digital intermediate frequency sampling signal section start, carrier Doppler frequency, ranging code phase place and signal carrier-to-noise ratio.
If to satellite navigation digital intermediate frequency sampling signal losing lock, return step one, restart search visible satellite signal.
Three, from the digital intermediate frequency sampling signal of Continuous Tracking, use binary phase shift keying BPSK (Binary Phase Shift Keying) hard-decision method (document 1: " GPS principle and Receiver Design ", Xie Gangzhu, Electronic Industry Press, on July 1st, 2009, ISBN:7121090775/9787121090776, section 12.3,330-331 page) demodulation navigation message, navigation message is the almanac data of satellite, clock correction data and almanac information.
Four, according to the carrier phase obtained, carrier Doppler frequency, ranging code phase place, the observed quantity of signal carrier-to-noise ratio and navigation message, triangle polyester fibre method is adopted to calculate the base station position coordinates (1: the 5.2 section, document, 98-100 page) being positioned at fixed observer point.
Five, the base station position coordinates calculated and base station accurate position coordinates are compared, calculate the high-precision difference reduction data (1: the 7.1 section, document, 158-160 page) of each satellite-signal of current time.
Repeat above-mentioned steps three to step 5, obtain continuous print high-precision difference reduction data, transfer to data memory module and preserve.
Data memory module receives continuous print high-precision difference reduction data, and store, namely instruction is stored to the hard disk of high in the clouds data server.
The data requesting instructions of Data dissemination module receives user access module, reads the continuous print high-precision difference reduction data of having preserved, is sent to User Access Module from data memory module.
User Access Module receives the information of the request access that user sends through data reception module, the information of request access is incoming instruction, customer location rough coordinates, user name, access pin and differential data request, User Access Module is after receiving incoming instruction, authentication of users name also mates access pin, access pass signal is sent to data reception module when access pin mates, User Access Module recording user information, after completing access, the rough coordinates of customer location and differential data request instruction are sent to Data dissemination module; Receive the continuous print high-precision difference reduction data that Data dissemination module is sent, transfer to data reception module.The user name of user's registration and access pin input to User Access Module by data reception module in advance and store.Rough coordinates is for obtaining high-precision difference reduction data corresponding to this coordinate.
Data reception module, according to the request of user, sends request the information of access to User Access Module; Receive the continuous print high-precision difference reduction data that User Access Module sends, be forwarded to high-precision difference locating module.
After high-precision difference locating module receives continuous print high-precision difference reduction data, complete high-precision difference location (1: the 7.2 section, document, 169-171 page).
In the present embodiment, antenna adopts choking coil antenna, and frequency of operation covers 1.1 ~ 1.3GHz and 1.5 ~ 1.6GHz, and impedance 50 ohm, standing-wave ratio is less than 1.5:1, and gain is not less than 19dB.Wave filter adopts the BGU7007 chip of grace intelligence Pu semiconductor N XP company.RF mixer adopts the RFC253 module of limited liability ChipStar company of Xing Xin Trend Micro of Shenzhen.Digital to analog converter adopts the ADS61JB46 chip of TI company of Texas Instrument, and adopt IQ sample mode, sample frequency is not less than 100MHz, and sampling bit wide is not less than 4 bits.Frequency mixer, buffer and network communication controller adopt the programming device Spartan-6XC6SL150T of Xilinx company of match SEL.High in the clouds is resolved server and is adopted Hewlett-Packard HP ProOne600G integrated computer.High in the clouds data server adopts Hewlett-Packard HP ProOne600G1 integrated computer.Rover station adopts NovAtel Propak-v6 receiver.Fiber optic network transmission speed is not less than 150MBps.Data network uses GPRS network or 3G network.
Structure of the present utility model reduces the complexity that differential reference station, satellite navigation ground is built, and makes full use of the computational resource that server is resolved in high in the clouds, effectively improves the treatment effeciency of difference research station construction efficiency and differential correcting data.
Claims (10)
1. a satellite navigation ground differential reference station, is provided with base station, it is characterized in that: described base station and long-range data processing centre (DPC) network.
2. differential reference station, satellite navigation ground according to claim 1, is characterized in that: described base station is networked through fiber optic network and data processing centre (DPC).
3. differential reference station, satellite navigation ground according to claim 2, it is characterized in that: described base station is provided with antenna, antenna is connected with radio-frequency (RF) acquisition device.
4. differential reference station, satellite navigation ground according to claim 3, is characterized in that: described radio-frequency (RF) acquisition device is made up of the wave filter be linked in sequence, RF mixer, digital to analog converter, frequency mixer, buffer and network communication controller.
5. differential reference station, satellite navigation ground according to claim 4, it is characterized in that: described data processing centre (DPC) is provided with high in the clouds and resolves server and high in the clouds data server, described radio-frequency (RF) acquisition device resolves server through fiber optic network and high in the clouds and is connected, the continuous print high-precision difference reduction data that server process obtains are resolved in high in the clouds, transfer to high in the clouds data server and store.
6. differential reference station, satellite navigation ground according to claim 5, is characterized in that: described network communication controller resolves server through fiber optic network and high in the clouds and is connected.
7. differential reference station, satellite navigation ground according to claim 6, is characterized in that: described data processing centre (DPC) and rover station are networked.
8. differential reference station, satellite navigation ground according to claim 7, is characterized in that: described data processing centre (DPC) and rover station adopt data network to network.
9. differential reference station, satellite navigation ground according to claim 8, is characterized in that: described high in the clouds data server and rover station adopt data network to network.
10. differential reference station, satellite navigation ground according to claim 9, is characterized in that: described base station is at least one, and rover station is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520026648.6U CN204374419U (en) | 2015-01-15 | 2015-01-15 | Differential reference station, satellite navigation ground |
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| CN201520026648.6U CN204374419U (en) | 2015-01-15 | 2015-01-15 | Differential reference station, satellite navigation ground |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977596A (en) * | 2015-06-08 | 2015-10-14 | 深圳北斗应用技术研究院有限公司 | High-accuracy position correction positioning system based on cloud computing |
| CN107872516A (en) * | 2017-10-23 | 2018-04-03 | 千寻位置网络有限公司 | Centimeter Level real-time positioning system and implementation method based on mixed cloud |
| CN113819837A (en) * | 2021-11-24 | 2021-12-21 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-power-consumption low-cost high-precision navigation satellite surface deformation monitoring system |
-
2015
- 2015-01-15 CN CN201520026648.6U patent/CN204374419U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977596A (en) * | 2015-06-08 | 2015-10-14 | 深圳北斗应用技术研究院有限公司 | High-accuracy position correction positioning system based on cloud computing |
| CN107872516A (en) * | 2017-10-23 | 2018-04-03 | 千寻位置网络有限公司 | Centimeter Level real-time positioning system and implementation method based on mixed cloud |
| CN113819837A (en) * | 2021-11-24 | 2021-12-21 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-power-consumption low-cost high-precision navigation satellite surface deformation monitoring system |
| CN113819837B (en) * | 2021-11-24 | 2022-03-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-power-consumption low-cost high-precision navigation satellite surface deformation monitoring system |
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Granted publication date: 20150603 Termination date: 20170115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |