CN116660953B - City CORS intelligent monitoring system - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
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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
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
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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
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/43—Determining position using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses an intelligent monitoring system for urban CORS, and relates to the technical field of CORS monitoring. The intelligent monitoring system for the urban CORS monitors the running state, the space availability and the positioning accuracy of the urban CORS in all weather, gives early warning in time and gives suggestions for an administrator to rapidly treat problems when the problem occurs in the running state of the CORS, fully digs potential problems of the urban CORS, provides better reference suggestions for various accuracy requirement users, and continuously improves and improves the service quality of the urban CORS; according to the urban CORS intelligent monitoring system, a certain number of differential data quality monitoring stations are built, automatic RTK positioning monitoring equipment is deployed, monitoring results are transmitted to the urban CORS data center in real time, and the results are analyzed and evaluated in real time, so that the urban CORS intelligent monitoring system has very important significance in improving the service quality of urban CORS and strengthening urban mapping geographic information service.
Description
Technical Field
The invention relates to the technical field of CORS monitoring, in particular to an intelligent monitoring system for urban CORS.
Background
The continuous operation reference station system (Continuously Operating Reference Stations, CORS) serves as an important infrastructure, serves the establishment and maintenance of a national and regional coordinate frame, meets the requirements of users in different industries on high-precision, quick and real-time positioning and navigation, provides services for various modern informatization management, becomes one of hotspots for application development of urban GNSS technology, is more and more in the current domestic built regional reference station network, cannot monitor the operation state of the regional reference station network in real time, has hysteresis in the aspect of operation and maintenance management of a reference station network platform, and consumes large manpower and material resources.
For monitoring of the urban CORS, all-weather continuous monitoring needs to be considered, when the problem occurs in the operation of the CORS, early warning is timely carried out, suggestions are given for an administrator to rapidly handle the problem, potential problems of the urban CORS are fully excavated, better reference suggestions are provided for users with various precision requirements, however, the prior art has defects, and the purpose cannot be achieved.
Disclosure of Invention
The invention aims to provide an intelligent monitoring system for urban CORS, which is provided with a plurality of differential data quality monitoring stations, is provided with automatic RTK positioning monitoring equipment, transmits monitoring results to an urban CORS data center in real time, and performs real-time analysis and evaluation on the results, thereby having very important significance for improving the service quality of the CORS and strengthening urban mapping geographic information service.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
an intelligent monitoring system for urban CORS evenly distributes a plurality of continuously operating monitoring stations according to the number and the density of the coverage area of the urban CORS, accesses the urban CORS, receives differential corrections, transmits the observation data of a high-precision geodetic GNSS receiver and the connection information and differential results of the monitoring stations to an urban CORS management service platform, and a platform manager or a user checks the operation condition of the monitoring stations through a platform interface;
the monitoring system consists of a monitoring station, a data processing center, a mobile terminal and a mobile network;
the data transmission adopts a 4G or 5G mobile network to carry out data bidirectional transmission, and a special line network can be accessed in a conditional area;
the city CORS management service platform comprises a visual information analysis and output module.
Further, the monitoring station is composed of a large-scale GNSS receiver, a GNSS antenna, a transmission module, an observation pier and a power supply module.
Further, the urban CORS intelligent monitoring system comprises a monitoring station configuration module, a data receiving and storing service module, a data analysis processing module and a differential quality visualization module;
the monitoring station configuration module is used for carrying out bidirectional interaction with the data receiving and storing service module, the data analysis and processing module and the differential quality visualization module to configure the transmission of naming parameters and state result parameters; and meanwhile, data sending and data fetching can be realized.
Furthermore, the urban CORS intelligent monitoring system adopts a three-layer B/S technical architecture and is divided into a representation layer, a logic layer and a data layer;
the data layer stores monitoring station state data, static observation data and GNSS RTK differential information data;
the logic layer realizes user management and monitoring and data transmission;
the presentation layer realizes the check of the monitoring information by the administrator and the user, and the management configuration and data exchange of the monitoring station by the service monitoring.
Furthermore, in the urban CORS intelligent monitoring system, the data communication center and the data analysis center are respectively and independently deployed, and meanwhile, the two centers simultaneously provide multistage services for RTK users, mobile terminal users, manager users, other real-time users and the like.
Further, the urban CORS intelligent monitoring system comprises monitoring station information management, monitoring station data analysis and service quality monitoring;
the monitoring station information management comprises equipment addition, equipment management, equipment center setting and data source management;
the monitoring station data analysis comprises real-time displacement analysis, real-time positioning analysis and real-time differential state analysis;
the service quality monitoring comprises fixed monitoring, positioning accuracy monitoring, data delay monitoring and satellite state monitoring.
The invention further aims to provide an application of the urban CORS intelligent monitoring system in urban CORS real-time state monitoring.
The invention further aims to provide an application of the urban CORS intelligent monitoring system in differential coordinate monitoring analysis;
the monitoring station coordinates are accurate coordinates of the monitoring station obtained through real-time dynamic calculation of long-time observation data, and the real-time coordinates are compared with the calculated coordinates; the coordinates are updated to the system configuration of the monitoring station in real time; the coordinate sequence analysis is to utilize a linear system state equation, output coordinate observation data through system input and output, optimally estimate the system state, quantitatively infer random quantity according to the coordinate data, analyze the coordinate change value of the monitoring station in real time, analyze and pre-judge the positioning result of the differential monitoring station, and complete the coordinate monitoring analysis of the differential monitoring station through a data chart and set an early warning value.
Another object of the present invention is to provide an application of the urban cor s intelligent monitoring system in time availability analysis and space availability analysis;
the differential service time availability analysis is divided into single-station time availability analysis and regional time availability analysis;
the space availability analysis is such that the space availability of the entire CORS coverage area can be viewed.
Another object of the present invention is to provide an application of the intelligent monitoring system for urban CORS in an intelligent service compensation mechanism, where the application is that when a problem occurs in a reference station around a monitoring station, the reference station cannot provide a positioning service market, the monitoring station can be modified into a reference station mode, participate in the calculation of a reference station network, and timely switch into a reference station positioning mode to provide a positioning service.
The invention further aims to provide an application of the urban CORS intelligent monitoring system in external coincidence precision detection.
The beneficial effects of the invention are as follows:
the invention relates to an urban CORS intelligent monitoring system, wherein a monitoring station is a simplified CORS reference station, and in order to solve the problem of high cost of a fixed IP network, data transmission adopts a 4G or 5G mobile network to carry out data bidirectional transmission, and a special line network can be accessed in a conditional area; meanwhile, based on a KMCORS reference station network service management platform, a corresponding module is developed, analysis and visual output of monitoring information are realized, and an administrator and a user can check the running condition of the monitoring station through corresponding interfaces;
the intelligent monitoring system for the urban CORS monitors the urban CORS in all weather, gives early warning in time and gives suggestions for an administrator to rapidly handle problems when the problem occurs in the operation of the CORS, fully digs potential problems of the urban CORS, provides better reference suggestions for various precision requirement users, and continuously improves and improves the service quality of the urban CORS;
according to the urban CORS intelligent monitoring system, a certain number of differential data quality monitoring stations are built, automatic RTK positioning monitoring equipment is deployed, monitoring results are transmitted to the urban CORS data center in real time, and the results are analyzed and evaluated in real time, so that the urban CORS intelligent monitoring system has very important significance in improving the service quality of urban CORS and strengthening urban mapping geographic information service.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
FIG. 1 is a diagram of the overall architecture of a system according to an embodiment of the present invention;
FIG. 2 is a distribution diagram of the location of a KMCORS reference station and a monitoring station according to an embodiment of the present invention;
FIG. 3 is a diagram of the overall architecture of a monitoring system according to an embodiment of the present invention;
FIG. 4 is a diagram of a technical architecture according to an embodiment of the present invention;
FIG. 5 is a system deployment framework according to an embodiment of the present invention;
FIG. 6 is a functional architecture diagram of a monitoring system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating real-time status monitoring according to an embodiment of the present invention;
FIG. 8 is a diagram of RTK coordinate changes of a monitoring station according to an embodiment of the present invention;
FIG. 9 is a graph of RTK coordinate change of a 24-hour monitoring station according to an embodiment of the present invention;
Detailed Description
In order to more clearly describe the technical scheme of the embodiment of the present invention, the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1:
in this embodiment, urban CORS is exemplified by Kunming, hereinafter abbreviated as KMCORS;
in order to realize real-time monitoring of the running state and the service quality of the KMCORS, an all-weather intelligent satellite comprehensive positioning monitoring system in Kunming city is built based on the KMCORS. The general idea is to uniformly arrange a certain number and density of continuously-operated monitoring stations in a KMCORS coverage area, access the KMCORS, receive differential corrections, transmit GNSS observation data, connection information and differential results of the monitoring stations to a KMCORS management service platform, and check the operation condition of the monitoring stations through a platform interface by a platform manager or a user so as to achieve the purpose of real-time monitoring. The monitoring system mainly comprises a monitoring station, a data processing center, a mobile terminal and a mobile network, and the overall structure of the system is as shown in figure 1.
In this embodiment, the monitoring station is a simplified reference station for CORS, and is composed of a ground-based GNSS receiver, a GNSS antenna, a transmission module, an observation pier, and a power supply module. In order to solve the problem of high cost of the fixed IP network, a mobile 4G network is adopted for data bidirectional transmission. Meanwhile, based on a KMCORS reference station network service management platform, a corresponding module is developed, analysis and visual output of monitoring information are achieved, and an administrator and a user can check the operation condition of the monitoring station through a corresponding interface.
In order to practice the invention:
the construction of the intelligent monitoring system mainly comprises the processes of data collection, point location design, point investigation and selection, installation and debugging, coordinate calculation, system research and development and the like.
In this embodiment, dot location design
The KMCORS reference station network consists of 46 reference stations, wherein 33 reference stations in the city domain range are simultaneously connected with 13 peripheral provincial CORS stations, the average base line length is 34.8km, and the reference station network covers 2.1 ten thousand square kilometers of Kunming full city domain. In order to effectively monitor the operation state of the KMCORS, 26 monitoring stations are designed according to the distribution condition of the reference stations, the monitoring stations are distributed in the center of a triangle formed by the reference stations and are uniformly distributed in the range of a city domain, and the distribution condition of the points is shown in figure 2.
Point of investigation
In order to achieve the purpose of effective monitoring, besides the monitoring stations are arranged in the triangle center formed by the reference stations as much as possible, the monitoring station points should also consider the observation conditions, such as selecting electromagnetic interference areas with small multipath effect, far away from the microwave stations and wireless transmitting towers, and the like. In addition, in order to facilitate the installation of the monitoring station and the long-term stable operation and maintenance, the monitoring station should also consider the factors of traffic convenience, small recent change of the station building environment, good mobile network signal, convenient access of commercial power, easy installation of equipment, safe operation environment and the like. Through on-site survey, the positions of 26 monitoring stations are finally determined by comprehensively considering the above point selection principles, and most point positions are selected on the roof of an office building of a village and town committee and are arranged on parapet walls on the roof.
Installation and debugging
The installation of the monitoring station mainly comprises the installation of an integrated observation pier, the installation of a lightning rod, the access of commercial power, the installation of a rainproof chassis, the installation of a GNSS antenna and a GNSS receiver, and the like, and the installation steps of the monitoring station are as follows: 1) The integral observation pier is installed on the parapet wall, the upright rod of the observation pier needs to be stable, and large shaking cannot occur; 2) Each monitoring station is provided with a lightning rod, the lightning rod takes grounding measures, and lightning protection grounding resistance detection is completed; 3) The antenna of the monitoring station is installed at an angle, the horizontal installation deviation and the vertical installation deviation are not more than 3 degrees, and the antenna is firmly fixed; 4) The GNSS receiver and the charge-discharge controller are arranged in the rainproof case, so that equipment protection is achieved.
The monitoring station debugging comprises network debugging, port configuration, parameter setting and the like, the network adopts mobile 4G network transmission, and the network signal quality and the network stability are mainly debugged; the port configuration mainly comprises the steps of configuring a data transmission port; the parameter setting mainly sets the site codes of the monitoring stations, the data transmission file formats and the like. Finally, checking whether the monitoring station is connected and acquires fixed differential decomposition or not and whether continuous observation data are used as the basis of successful installation and debugging through the KMCORS online service platform.
Coordinate solution
And uniformly networking 26 monitoring stations with the KMCORS reference station, and carrying out coordinate calculation according to the precision requirement of the GNSS C level point by utilizing 24-hour synchronous static observation data. The baseline processing software adopts GAMIT10.71 software, the adjustment processing software adopts COSA GPS6.0 software, the horizontal component of error in the baseline classification of adjacent points is 1.0mm, the vertical component is 3.3mm, the horizontal component and the vertical component are respectively smaller than the standard requirements of 10mm and 20mm, the error in the weakest edge relative center is 1/28111000, and other various precision indexes meet the standard requirements. The coordinate result calculated by the monitoring station can be used as a true value for monitoring the accuracy of the coincidence outside the monitoring station.
System development
The monitoring system is a key for realizing the monitoring of the KMCORS service quality, and the KMCORS monitoring subsystem is developed based on a KMCORS management service platform. The system adopts a modularized design, forms an integral system in a micro-service mode, comprises a monitoring station configuration module, a data receiving and storing service module, a data analysis and processing module and a differential quality visualization module, and has an integral architecture shown in figure 3.
The system adopts a three-layer B/S technical architecture, and is divided into a representation layer, a logic layer and a data layer, as shown in figure 4. The data layer stores monitoring station state data, static observation data and GNSS RTK differential information data; the logic layer realizes user management and monitoring and data transmission; the presentation layer realizes the check of monitoring information by an administrator and a user, and the management configuration, data exchange and the like of the monitoring station by service monitoring.
The monitoring system is deployed in an independent deployment and synchronous multistage service mode. The independent deployment divides the system into a data communication center and a data analysis center for independent deployment, simultaneously provides multistage services for RTK users, mobile terminal users, manager users, other real-time users and the like, and the system deployment scheme is shown in figure 5:
the monitoring system mainly comprises the following functional implementation aspects
The monitoring system mainly comprises monitoring station information management, monitoring station data analysis, service quality monitoring and the like, and can realize monitoring station information management, real-time precision evaluation of station coordinates and system service quality monitoring, and the monitoring platform functional system is shown in figure 6.
Example 2
An application of an urban CORS intelligent monitoring system in urban CORS real-time state monitoring;
as shown in fig. 7, the real-time monitoring of the kmcor running state and the service quality is performed, and the satellite integrated positioning all-weather intelligent monitoring system in kunming city is built based on kmcor, wherein red color represents abnormality.
Example 3
An application of an urban CORS intelligent monitoring system in differential coordinate monitoring analysis;
differential coordinate monitoring analysis
The monitoring station coordinates are accurate coordinates of the monitoring station obtained through real-time dynamic calculation of long-time observation data, and the coordinates are updated to the system configuration of the monitoring station in real time; the coordinate sequence analysis is to utilize a linear system state equation, input and output coordinate observation data through a system, perform optimal estimation on the system state, quantitatively infer random quantity according to the coordinate data, analyze and pre-judge the positioning result of the differential monitoring station, and complete the coordinate monitoring analysis of the differential monitoring station through a data chart and a set pre-warning value, as shown in fig. 8, the RTK coordinate change diagram of the No. 26 monitoring station is superior to 2cm in most of time plane precision and superior to 5cm in ground high precision.
The monitoring station coordinates are accurate coordinates of the monitoring station obtained through real-time dynamic calculation of long-time observation data, and the coordinates are updated to the system configuration of the monitoring station in real time; the coordinate sequence analysis is to utilize a linear system state equation, output coordinate observation data through system input and output, optimally estimate the system state, quantitatively infer random quantity according to the coordinate data, analyze the coordinate change value of the monitoring station in real time, analyze and pre-judge the positioning result of the differential monitoring station, and complete the coordinate monitoring analysis of the differential monitoring station through a data chart and set an early warning value.
As shown in FIG. 8, the RTK coordinate change diagram of the No. 26 monitoring station is superior to 2cm in most time plane precision and superior to 5cm in ground high precision.
FIG. 9 is a graph of RTK coordinate changes for a 24-hour monitoring station;
example 4
An application of an urban CORS intelligent monitoring system in time availability analysis;
differential service time availability analysis is divided into single-site time availability analysis and regional time availability analysis.
The time availability analysis is mainly characterized in that continuous observation data of a monitoring station are obtained, a floating solution without ionosphere combination ambiguity can be continuously calculated by utilizing Kalman filtering, a fixed solution with wide lane ambiguity is obtained by utilizing Melbourne-Hubbena combination, so that a differential fixed result of the monitoring station is obtained, a differential monitoring station coordinate change value is obtained in real time by utilizing a differential coordinate monitoring analysis method, a result time sequence is counted by utilizing a data statistics method, the sequence is analyzed by utilizing an ARIMA model to give a single-station time availability result, and finally the result is visually displayed by utilizing a visual analysis method, and a single-station time availability statistics table is drawn.
The single station time availability analysis module is used for analyzing a single station area to obtain continuous observation data of a monitoring station, continuously resolving floating solutions without ionosphere combination ambiguity by utilizing Kalman filtering, obtaining fixed solutions with wide lane ambiguity by utilizing Melbourne-Hubbena combination, obtaining a differential fixed result of the monitoring station, obtaining a coordinate change value of the differential monitoring station in real time by utilizing a differential coordinate monitoring analysis method, counting a result time sequence by utilizing a data statistics method, analyzing the sequence by utilizing an ARIMA model to give a single station time availability result, finally visually displaying the result by utilizing a visual analysis method, and drawing a single station time availability statistics table.
The regional time availability analysis module is used for carrying out differential modeling on the region by acquiring single-station results of all differential monitoring stations in the region and utilizing a space Kriging interpolation method and combining level distribution to form a regional differential precision model, and drawing a regional precision contour line by utilizing a three-dimensional visual drawing method to simultaneously provide regional differential service time availability.
Example 5
An application of an intelligent monitoring system of urban CORS in an intelligent service compensation mechanism.
The intelligent service compensation mechanism is used for accessing and evaluating the precision in real time for the Kunming CORS service, and simultaneously, when the high-precision position service capability of the area where the equipment is detected is low, the equipment is automatically switched from the mobile reference station mode to the fixed reference station to participate in the high-precision position service calculation and provide the high-precision position service in the coverage area, so that the compensation function of the high-precision position service is realized. The intelligent monitoring station device mode switching part mainly reflects the intelligent monitoring station device mode switching part, and the device can adopt different modes such as a single base station, RTK and the like to compensate services according to different terrain service requirements. In addition, the monitoring station can be converted into a reference station mode according to the needs, so that the differential service of remote mountain areas in Kunming city is effectively made up, the investment cost is saved, and the purpose of one machine for one monitoring station is realized.
Example 6
An application of an urban CORS intelligent monitoring system in external coincidence precision detection.
In order to reduce the cost of the precision detection of the KMCORS, the real-time positioning function of the monitoring station can be utilized to replace the conventional field precision detection, and the efficiency is greatly improved.
The comparison between the calculation result of the monitoring station and the RTK result of the monitoring station can be used for real-time dynamic positioning accuracy test analysis and research of Kunming CORS.
Based on the embodiment, the Kunming CORS builds a first city CORS monitoring system nationwide, establishes an objective and scientific high-precision service quality evaluation system, and realizes intelligent all-weather monitoring of Kunming CORS operation. And the 26 monitoring stations built have the reference station attribute, can realize real-time data stream transmission, can also realize the all-weather real-time mobile reference station function, and the construction of the Kunming CORS monitoring system greatly improves the operation and maintenance management efficiency, and has higher use value for the research of related fields.
In the future, kunming CORS further solves the expansion and optimization of functions and designs of the monitoring system, simultaneously improves related services of the Kunming CORS monitoring system aiming at Beidou reconstruction of a reference station and a data center, and finally builds the Kunming satellite positioning integrated service system into a GNSS integrated service system with high precision, high space-time resolution, high efficiency and high coverage rate.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (1)
1. An intelligent monitoring system for urban CORS, which is characterized in that: uniformly arranging a plurality of continuous operation monitoring stations in the coverage area of the urban CORS according to the number and the density, accessing the urban CORS, receiving differential corrections, transmitting the observation data of the high-precision geodetic GNSS receiver and the connection information and differential results of the monitoring stations to an urban CORS management service platform, and checking the operation condition of the monitoring stations by a platform manager or a user through a platform interface;
the monitoring system consists of a monitoring station, a data processing center, a mobile terminal and a mobile network;
the data transmission adopts a 4G or 5G mobile network to carry out data bidirectional transmission, and the network has the conditional area and can be accessed to a private line network;
the city CORS management service platform comprises a visual information analysis and output module;
the monitoring station consists of a ground GNSS receiver, a GNSS antenna, a transmission module, an observation pier and a power supply module;
the urban CORS intelligent monitoring system comprises a monitoring station configuration module, a data receiving and storing service module, a data analysis and processing module and a differential quality visualization module;
the monitoring station configuration module is used for carrying out bidirectional interaction with the data receiving and storing service module, the data analysis and processing module and the differential quality visualization module to configure the transmission of naming parameters and state result parameters; meanwhile, data sending and data fetching can be realized;
the urban CORS intelligent monitoring system adopts a three-layer B/S technical architecture and is divided into a representation layer, a logic layer and a data layer;
the data layer stores monitoring station state data, static observation data and GNSS RTK differential information data;
the logic layer realizes user management and monitoring and data transmission;
the presentation layer realizes the check of the monitoring information by the administrator and the user, and the management configuration and data exchange of the monitoring station by the service monitoring;
according to the urban CORS intelligent monitoring system, a data communication center and a data analysis center are respectively and independently deployed, and simultaneously, the two centers simultaneously provide multi-level services for RTK users, mobile terminal users, manager users and other real-time users;
the urban CORS intelligent monitoring system comprises monitoring station information management, monitoring station data analysis and service quality monitoring;
the monitoring station information management comprises equipment addition, equipment management, equipment center setting and data source management;
the monitoring station data analysis comprises real-time displacement analysis, real-time positioning analysis and real-time differential state analysis;
the service quality monitoring comprises fixed monitoring, positioning accuracy monitoring, data delay monitoring and satellite state monitoring;
differential coordinate monitoring analysis of the urban CORS intelligent monitoring system:
the monitoring station coordinates are accurate coordinates of the monitoring station obtained through real-time dynamic calculation of long-time observation data, and the coordinates are updated to the system configuration of the monitoring station in real time; the coordinate sequence analysis is to utilize a linear system state equation, output coordinate observation data through system input and output, optimally estimate the system state, quantitatively infer random quantity according to the coordinate data, analyze the coordinate change value of the monitoring station in real time, analyze and pre-judge the positioning result of the differential monitoring station, and complete the coordinate monitoring analysis of the differential monitoring station through a data chart and a set early warning value;
time availability analysis of urban CORS intelligent monitoring system:
the method mainly comprises the steps of obtaining continuous observation data of a monitoring station, continuously resolving a floating solution without ionosphere combined ambiguity by utilizing Kalman filtering, obtaining a fixed solution of widelane ambiguity by utilizing Melbourne-Hubbena combination, obtaining a differential fixed result of the monitoring station, obtaining a coordinate change value of the differential monitoring station in real time by utilizing a differential coordinate monitoring analysis method, carrying out statistics on a result time sequence by utilizing a data statistics method, analyzing the sequence by utilizing an ARIMA model to give a single station time availability result, finally carrying out visual display on the result by utilizing a visual analysis method, and drawing a single station time availability statistics table;
intelligent service compensation mechanism of urban CORS intelligent monitoring system:
the intelligent service compensation mechanism is used for accessing and evaluating the precision of the urban CORS service in real time, and simultaneously, when the high-precision position service capability of the area where the equipment is detected is low, the equipment is automatically switched from the mobile reference station mode to the fixed reference station to participate in the high-precision position service calculation and provide the high-precision position service in the coverage area, so that the compensation function of the high-precision position service is realized.
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