WO2018161605A1

WO2018161605A1 - Continuously operating reference station system

Info

Publication number: WO2018161605A1
Application number: PCT/CN2017/107412
Authority: WO
Inventors: 叶雷; 王浩
Original assignee: 泛太通信导航有限公司
Priority date: 2017-03-09
Filing date: 2017-10-24
Publication date: 2018-09-13
Also published as: CN206505179U

Abstract

A continuously operating reference station system comprises: a reference station subsystem (10). The reference station subsystem (10) comprises a plurality of reference stations (101). The reference station (101) comprises: a 220-channel GNSS receiver compatible with bands B1 and B3 of the Beidou-2 satellite navigation system, in which the receiver transmits received satellite positioning data to a data center subsystem (11). The data center subsystem (11) comprises: a data storage device (111) storing reference station data; a data processing device (112) obtaining, according to the reference station data, correction data of the satellite positioning data; and a network device (113) transmitting the satellite positioning data to the data processing device (112), and transmitting the correction data to a data communication subsystem (12). The data communication subsystem (12) comprises: a mobile communication device (121) transmitting the correction data to a client application subsystem (13) via a mobile data network; and an Internet communication device (122) transmitting the correction data to the client application subsystem (13) via the internet. The client application subsystem (13) comprises a plurality of terminal devices (131) displaying, according to the correction data, a positioning result.

Description

Continuous operation of the reference station system

The present application claims priority to Chinese Patent Application Serial No. No. No. No. No. No. No. No. No. No.

Technical field

The present application relates to the field of satellite communications, and more particularly to a continuous operation reference station system.

Background technique

Differential positioning technology is an important geospatial infrastructure. The differential positioning technology system is to deploy a number of global navigation satellite systems (GNSS) continuous operation base stations in a certain area (usually the administrative level above the county level) to model the regional GNSS positioning error as a whole, through the wireless data communication network. The user broadcasts the positioning enhancement information to increase the positioning accuracy of the user terminal from 3-10 meters to 2-3 cm, and the positioning accuracy is evenly distributed, the real-time performance is high, and the reliability is high; meanwhile, the differential positioning technology system is regional high-precision and dynamic. An effective means of establishing and maintaining a three-dimensional coordinate reference frame network to provide a unified positioning reference for users in the area.

The current GNSS has evolved from a single satellite constellation GPS navigation system to a multi-satellite constellation GNSS navigation system. GNSS includes the US GPS, GLONASS in Russia, Compass in China, and Galileo in the European Union, as well as the Satellite-Based Augmentation System. SBAS), including the US Wide Area Augmentation System (WAAS), Europe's European Geostationary Navigation Overlay Service (EGNOS), Russia's Differential Correction and Monitoring System Station (SDCM), Japan Quasi-Zenith Satellite System (QZSS) and Multi-Functional Satellite Augmentation System (MSAS), India's Indian Regional Navigation Satellite System (IRNSS) and GPS-assisted static orbit enhancement The navigation system (GAGAN) and Nigeria's Nigerian Communication Satellite-1 (NiComSat-1), etc., so that the number of satellites available for the GNSS system can reach more than 100.

The Beidou satellite navigation system is a self-developed, independent global satellite navigation system being implemented in China. Beidou satellite navigation system can be compatible with GPS, GLONASS and other systems. The 120-channel receiver in the continuous operation of the reference station system is not fully compatible with the Beidou satellite navigation system.

Summary of the invention

In view of this, the embodiment of the present application provides a continuous operation reference station system, which is used to solve the technical problem that the continuous operation reference station system in the prior art cannot be fully compatible with the Beidou satellite navigation system.

According to an aspect of an embodiment of the present application, a continuously operating reference station system is provided, including: a reference station subsystem, a data center subsystem, a data communication subsystem, and a client application subsystem; the reference station subsystem includes a plurality of reference stations The reference station includes: a 220-channel GNSS receiver compatible with the frequency band B1 and the frequency band B3 of the Beidou-2 satellite navigation system, and transmits the received satellite positioning data to the data center subsystem; the data center subsystem includes: a data storage device, Preserving global IGS and GNSS reference station data; the data processing device obtaining correction data of the satellite positioning data according to the global IGS and GNSS reference station data; and the network device transmitting the satellite positioning data to the data processing device and transmitting The correction data to the data communication subsystem; the data communication subsystem comprises: a mobile communication device, transmitting the correction data to the client application subsystem through the mobile data network; and the internet communication device transmitting the correction data to the client application via the Internet System; the client application subsystem includes multiple terminal devices, root The correction result is displayed according to the correction data.

The beneficial effects of the embodiments of the present application include: the GNSS receiver of the continuous operation reference station system is compatible with all frequency points of the Beidou-2 satellite navigation system (BD2) frequency band B1 and the frequency band B3, and the GNSS receiver signal processing reaches 220 channels and can receive GPS L1/L2/L5 full-cycle carrier, GLONASS L1/L2 full-cycle carrier, wide-area differential SBAS (MSAS/WAAS/EGNOS) and Galileo and other four GNSS navigation systems make the measurement data in the field more accurate and reliable.

DRAWINGS

The above and other objects, features and advantages of the present application will become more apparent from

1 is a schematic structural diagram of a continuous operation reference station system provided by an embodiment of the present application;

2 is a schematic structural diagram of a continuous operation reference station system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a continuous operation reference station system provided by an embodiment of the present application.

detailed description

The present application is described below based on the embodiments, but the present application is not limited to only these embodiments. In the following detailed description of the application, some specific details are described in detail. For those skilled in the art The description can be fully understood without the description of these details. In order to avoid obscuring the essence of the application, well-known methods, procedures, procedures, components and circuits are not described in detail.

In addition, the drawings are provided for the purpose of illustration, and the drawings are not necessarily to scale.

Also, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one component or subcircuit by electrical or electromagnetic connection. When an element or circuit is referred to as "connected to" another element or the element / circuit is "connected" between the two means, it may be directly coupled or connected to the other element or Connections can be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is meant that there are no intervening elements.

Unless explicitly required by the context, the words "including", "comprising", and the like in the claims and the claims should be interpreted as meanings of meaning rather than exclusive or exhaustive meaning; that is, "including but not limited to" The meaning.

In the description of the present application, it is to be understood that the terms "first", "second" and the like are used for the purpose of description only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" is two or more unless otherwise stated.

The GNSS receiver of the Continuous Operational Reference System (CORS) provided by the embodiment of the present application is compatible with all frequency points of the B1 and B3 of the Beidou-2 satellite navigation system (BD2), and the signal processing of the GNSS receiver is achieved. 220 channels, capable of receiving GPS L1/L2/L5 full-cycle carrier, GLONASS L1/L2 full-cycle carrier, wide-area differential SBAS (MSAS/WAAS/EGNOS) and Galileo and other four GNSS navigation systems, making measurement data more accurate in the field ,reliable. CORS data processing equipment can also use a distributed processing server cluster to collect information such as ephemeris, clock error, ionospheric correction information, and positioning deviation from multiple information sources for information fusion and joint solution, and to calculate correction data (Correction Data) faster and more accurate.

1 is a schematic structural diagram of a CORS provided by an application embodiment, including a reference station subsystem 10, a data center subsystem 11, a data communication subsystem 12, and a client application subsystem 13.

The reference station subsystem 10 includes a plurality of reference stations 101, each located in a different area, and the reference station 101 is also referred to as a differential positioning reference station. Each reference station 101 internally includes a GNSS receiver that receives satellite positioning data from the satellite. The GNSS receiver is compatible with all frequency points of Band B1 and Band B3 of BD2, and the signal processing reaches 220 channels, which is fully compatible with the satellite positioning function of BD2. The GNSS receiver transmits the received satellite positioning data to the data center subsystem 11.

The data center subsystem 11 includes a data storage device 111, a data processing device 112, and a network device 113. The storage capacity of the data storage device 111 is capable of storing 24-day 1 second sampling rate data and corresponding value-added service data for preserving global International GPS Service (IGS) and GNSS reference station data. The data processing device 112 obtains corrected data of the satellite positioning data according to the global IGS and GNSS reference station data and through a preset algorithm. The network device 113 transmits the satellite positioning data received by the GNSS receiver to the data processing device 112 and transmits the corrected data to the data communication subsystem 12.

The data communication subsystem 12 includes a mobile communication device 121 and an internet communication device 122. The mobile communication device 121 transmits the correction data to the client application subsystem 13 via the mobile data network; the internet communication device 122 transmits the correction data to the client application subsystem 13 via the Internet. The client application subsystem 13 includes a plurality of terminal devices 131 that use the received correction data to display corresponding positioning results. The terminal device 131 may be one or more of a computer, a mobile phone, a tablet computer, a mapping device, and a handheld device.

The CORS of this embodiment is fully compatible with the satellite positioning function of BD2. The satellite positioning function of BD2 has various advantages: (1) has positioning and communication functions, and does not require support from other communication systems, and GPS can only be positioned; (2) coverage The scope is large. At present, BD2 seamlessly covers the Asia-Pacific region, and the coverage effect is better than GPS; (3) It is especially suitable for large-scale monitoring management and data collection of group users; (4) China's autonomous system is safe, reliable, stable, and has strong confidentiality. Suitable for key department applications. Compared with GPS, the BD2 satellite navigation system not only designs 27 global satellites, but also designs 5 geosynchronous satellites and 3 geostationary orbit satellites over the country (using the Earth as a reference, centering on China, going back and forth to the north and south hemispheres). Rotating), so that the application of BD2 in the Asia-Pacific region is far better than GPS, especially in high-occlusion areas or occlusion environments.

The CORS provided in this embodiment can also be compatible with positioning systems such as BD2, GPS, GLONASS, and Galileo. The design of the BD2 signal is mainly compatible with GPS, GLONASS and Galileo signals, which is conducive to improving the reliability of constellations in China and surrounding coverage. The principle of star selection is: BD2 is preferred, followed by GPS, GLONASS, Galileo and other constellation satellites. In this basic principle, the balance between positioning accuracy and calculation amount is maintained during the actual star selection, which not only ensures the selection of the satellite combination with the smallest Geometric Dilution of Precision (GDOP), but also the calculation amount and operation speed. At this time, the GNSS receivers in each reference station 101 are full-band GNSS receivers compatible with BD2, GPS, GLONASS, and Galileo, so the GNSS receiver supporting the four-star full-band requires a better-performance processor and motherboard. The processor is preferably a Cortex-M3 processor, using ARM's latest instruction set architecture, which uses Thumb-2 technology to reduce GNSS receiver memory utilization by 31%, performance by 38%, and enable smaller chip area. , to facilitate the integration of more features. The motherboard is fully compatible with BD2 system signals, supports Samsung solution, and reserves the Galileo signal channel. Tracking GIOVE-A and GIOVE-B test satellites for signal processing, experimental purposes, compact package, low power consumption (1.5W only), and support for Ethernet, USB, RS232 and CAN interface connections.

In one embodiment, as shown in FIG. 2, the client application subsystem 13 further includes a Beidou RDSS user machine 132 (which may also be a Beidou RNSS user machine or a dual mode user machine that is compatible with both RDSS and RNSS). When the CORS provided by the embodiment of the present application is applied to surveying and mapping in a field environment, the location of the user (the surveying and mapping staff) is likely to have no mobile communication network and internet communication network signals, so the customer application subsystem 13 needs to be equipped with the Beidou RDSS. The user machine 132 receives the corrected data from the data communication subsystem 12, at which time the data communication subsystem 12 also transmits the data to the Beidou RDSS user machine 132 of the client application subsystem 13 by the corresponding RF transceiver 123. The Beidou RDSS user machine can establish a communication connection with the terminal device 131 through the RS232 interface, and send the received correction data to the terminal device 131 for display. Beidou RDSS user machine 132 has low power consumption and small size, which can be used in handheld mode. It is suitable for working conditions in harsh outdoor environments, waterproof, dustproof, stable and reliable.

In one embodiment, since the reference station 101 is exposed to the outdoor environment for a long period of time, and sometimes is placed in a relatively harsh field environment, it is necessary to provide high protection to the GNSS receiver and circuit inside the reference station 101. Ensure that its work is stable and reliable. Therefore, the inner cavity formed by the outer casing of the GNSS receiver is filled with argon gas, which is an inert gas. Under normal conditions, it is difficult to participate in the reaction with other elements or compounds, and the contact between the internal components of the GNSS receiver and the outside can be isolated. It prevents oxidation of internal components, maintains stable parameters, and is easy to detect and control, thereby improving the stability of the instrument, and argon is easy to prepare and low in cost.

In one embodiment, data processing device 112 of data center subsystem 11 is a distributed data processing server cluster. Using Differential Positioning Data to Solve Differential Correction Data If a single processor is used, methods such as computational speed and hardware and software requirements have limitations. The distributed data processing server cluster is used to solve the differential correction data, and the information such as ephemeris, clock error, ionospheric correction information, and positioning deviation from multiple information sources are collected for information fusion and joint solution, and the correction data is calculated faster and more accurately. . Cloud server computing is a large-scale distributed computing platform that integrates storage and computing. It has good scalability. It can adjust the size of sub-cluster and change the evolution strategy according to the size of the server cluster and the calculation of tasks. Means to further optimize the performance of the algorithm.

In one embodiment, as shown in FIG. 3, the CORS also includes a value added service subsystem 14. Value-added services include one or more of navigation, meteorology, and geology. The value-added service subsystem 14 further includes a value-added service data storage device 141 and a network device 142; the value-added service data storage device 141 is configured to store the continuously updated value-added service data, and send the updated value-added service data to the data center through the network device 142. Data storage device 111 of system 11. The data center subsystem 11 establishes a pair of correction data and value-added service data according to the location information. The relationship between the corresponding correction data and the value-added service data is sent to the client application subsystem 13 through the data communication subsystem 12, so that the CORS has the ability to provide customers with value-added services such as navigation, weather, and geological conditions.

The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. Various changes and modifications may be made to the present application. Any modifications, equivalents, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

A continuous operation reference station system, comprising: a reference station subsystem, a data center subsystem, a data communication subsystem, and a client application subsystem;

The reference station subsystem comprises a plurality of reference stations, the reference station comprising: a 220 channel GNSS receiver compatible with the frequency band B1 and the frequency band B3 of the Beidou-2 satellite navigation system, and transmitting the received satellite positioning data to the data center subsystem;

The data center subsystem includes: a data storage device that stores global IGS and GNSS reference station data; a data processing device that obtains corrected data of the satellite positioning data according to the global IGS and GNSS reference station data; and a network device that transmits the satellite Locating data to the data processing device, transmitting the modified data to a data communication subsystem;

The data communication subsystem includes: a mobile communication device that transmits the modified data to a client application subsystem through a mobile data network; and an internet communication device that transmits the revised data to a client application subsystem via the Internet;

The client application subsystem includes a plurality of terminal devices, and displays the positioning result according to the correction data.
The continuously operating reference station system of claim 1 wherein said GNSS receiver is a full band GNSS receiver compatible with BD2, GPS, GLONASS and Galileo.
The continuously operating reference station system of claim 2 wherein said GNSS receiver employs a Cortex-M3 processor.
The continuously operating reference station system of claim 1 wherein said client application subsystem further comprises a Beidou RDSS user machine for transmitting said correction data in an area not covered by the mobile communication network.
The continuously operating reference station system of claim 1 wherein said data processing device is a distributed data processing server cluster.
The continuous operation reference station system according to claim 1, wherein the terminal device comprises one or more of a computer, a mobile phone, a tablet computer, a surveying device, and a handheld device.
The continuously operating reference station system of claim 1 wherein said continuously operating reference station system further comprises a value added service subsystem for transmitting value added service data corresponding to said satellite positioning data to said data center subsystem; Value-added services include one or more of navigation, meteorology, and geology.