CN114167461A - Engineering measurement method and CORS system - Google Patents

Engineering measurement method and CORS system Download PDF

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Publication number
CN114167461A
CN114167461A CN202111315841.8A CN202111315841A CN114167461A CN 114167461 A CN114167461 A CN 114167461A CN 202111315841 A CN202111315841 A CN 202111315841A CN 114167461 A CN114167461 A CN 114167461A
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China
Prior art keywords
cors
positioning data
mobile station
station
target
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CN202111315841.8A
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Chinese (zh)
Inventor
梁王彤
杨启超
郜兰
吕辉
张宏飞
王世荣
刘中青
李军
郭永亮
岳福山
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China Railway Sixth Group Co Ltd
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China Railway Sixth Group Co Ltd
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Priority to CN202111315841.8A priority Critical patent/CN114167461A/en
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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
    • 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
    • G01S19/396—Determining accuracy or reliability of position or pseudorange measurements
    • 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
    • G01S19/40—Correcting position, velocity or attitude
    • G01S19/41—Differential correction, e.g. DGPS [differential GPS]

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

The invention relates to the technical field of engineering measurement, and discloses an engineering measurement method which is used for solving the technical problems that the engineering measurement method in the prior art is low in measurement speed and inaccurate in measurement result. The method comprises the following steps: receiving a satellite positioning signal from a GNSS satellite based on a CORS reference station, and analyzing the satellite signal to obtain first positioning data corresponding to the CORS reference station; receiving a satellite positioning signal from a GNSS satellite based on a CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal; when the server receives a measurement request sent by a user, the server performs differential calculation on the first positioning data and the second positioning data to obtain a position coordinate of the CORS mobile station; and determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.

Description

Engineering measurement method and CORS system
Technical Field
The invention relates to the technical field of engineering measurement, in particular to an engineering measurement method and a CORS system.
Background
In the process of building infrastructure such as railways, roads and municipal projects, in order to ensure that the engineering effect reaches the standard, the construction position is required to be ensured to be accurate, and the project size obtained by construction is required to be accurate. In this process, various data measurements are required. In the process of constructing different projects, the environments and time are different during construction surveying and mapping, so that the measurement work in different environments can meet the conditions of a plurality of obstacles such as mountainous areas, forests or standing high buildings around, and the like, and can also meet the conditions of bad weather and the like; moreover, these conditions may cause the topography of the construction area to change during the construction process, so it is important to measure the construction area quickly in real time.
The measurement method adopted in the prior art generally corrects data and obtains a measurement result through a reference station, but the measurement method in the prior art has longer working time and long field operation time; and the positioning precision is not enough, and the influence of the environment is easily caused, so that the measuring speed is low and the measuring result is not accurate enough.
Disclosure of Invention
The invention mainly aims to solve the technical problems that an engineering measurement method in the prior art is low in measurement speed and inaccurate in measurement result.
The invention provides an engineering measurement method, which is applied to a CORS system and is characterized in that the CORS system comprises at least one CORS reference station, at least one CORS mobile station and a server, wherein the CORS reference station and the CORS mobile station are respectively arranged in a construction area corresponding to an engineering project to be measured, the CORS mobile station corresponds to a measurement point in the construction area, and the engineering measurement method comprises the following steps: receiving a satellite positioning signal from a GNSS satellite based on the CORS reference station, and analyzing the satellite signal to obtain first positioning data corresponding to the CORS reference station; receiving a satellite positioning signal from the GNSS satellite based on the CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal; when the server receives a measurement request sent by a user, the server performs differential calculation on the first positioning data and the second positioning data to obtain a position coordinate of the CORS mobile station; and determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.
Optionally, in a first implementation manner of the first aspect of the present invention, when the number of the at least one CORS reference station is at least two and the number of the at least one CORS mobile station is one, the obtaining, by the server, the position coordinate of the CORS mobile station by performing differential calculation on the first positioning data and the second positioning data includes: calculating the distance between the CORS mobile station and each CORS reference station by using the server according to the second positioning data and the first positioning data; selecting a plurality of CORS reference stations meeting the conditions from at least two CORS reference stations according to the distance as target CORS reference stations, and extracting first positioning data corresponding to each target CORS reference station to obtain a target first positioning data set; and carrying out differential calculation according to the first positioning data set and the second positioning data of the target to obtain the position coordinate of the CORS mobile station.
Optionally, in a second implementation manner of the first aspect of the present invention, when the number of the plurality of target CORS reference stations is three, the performing a differential calculation according to the target first positioning data set and the second positioning data to obtain the position coordinate of the CORS mobile station includes: acquiring three synchronous target first positioning data of three target CORS reference stations, wherein the target first positioning data comprises a precise ephemeris and a precise clock error; determining a triangular network area according to the three target CORS reference stations; carrying out difference processing on the three target first positioning data to determine an area correction parameter of the triangular network area; simulating an error correction model of the triangular network area; performing differential calculation according to the first positioning data set and the second positioning data of the target to obtain a calculation result; and correcting the calculation result according to the error correction model of the triangular network area to obtain the position coordinate of the CORS mobile station.
Optionally, in a third implementation manner of the first aspect of the present invention, when the number of the target CORS reference stations is one, the selecting, according to the distance, a plurality of CORS reference stations that satisfy a condition from at least two CORS reference stations as target CORS reference stations, and extracting first positioning data corresponding to each target CORS reference station to obtain a target first positioning data set includes: sequencing at least two CORS reference stations according to the distance to obtain a reference station distance sequence; and extracting the CORS reference station corresponding to the distance with the minimum distance in the reference station distance sequence, and taking the obtained corresponding CORS reference station as a target CORS reference station.
Optionally, in a fourth implementation manner of the first aspect of the present invention, the calculating, according to the position coordinates of each of the measurement points, an engineering measurement result requested by the measurement request includes: acquiring the type of the position coordinate of the CORS mobile station and the type of the plane rectangular coordinate of the construction area; calculating a mathematical transformation relation between the type and the plane rectangular coordinate type; converting the position coordinates of the measuring points according to the mathematical conversion relation to obtain a conversion coordinate result; and calculating an engineering measurement result according to the coordinate conversion result.
Optionally, in a fifth implementation manner of the first aspect of the present invention, before receiving a satellite positioning signal from a GNSS satellite based on the CORS reference station, the method further includes: acquiring a construction design file of an engineering measurement project, and determining the position of a reference point of the CORS reference station to be installed in a construction area according to the construction design file; collecting environmental data of the position of the reference point, and evaluating whether the environment is qualified or not; if the reference point is qualified, building a receiver support at the position of the reference point, and installing an outdoor receiver on the receiver support; installing an indoor server and connecting the indoor server with the outdoor receiver; and calling an indoor server to check the position of the outdoor receiver and a pre-established known position point to obtain a CORS reference station.
Optionally, in a sixth implementation manner of the first aspect of the present invention, the acquiring environmental data of the position of the reference point, and evaluating whether the environment is qualified includes: erecting a ground type choke coil antenna at the position of the reference point, recording observation data of GNSS satellite signals for 24h at a sampling interval of 30s, and calling preset environment detection software to analyze the observation data to obtain a software detection result; if the software detection result is that the environmental data is qualified, judging that the environmental data is qualified; if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complexity and epoch With Data contained in the software detection result are in error, if not, checking the signal-to-noise ratio, and if the signal-to-noise ratio is within a preset signal-to-noise ratio threshold range, considering the environmental Data to be qualified; if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complete and epoch With Data contained in the software detection result are wrong, if so, calling preset environment detection software to analyze and obtain a retest result, and if the retest result is still failed, considering that the environment Data is unqualified.
Optionally, in a seventh implementation manner of the first aspect of the present invention, before analyzing a satellite signal to obtain first positioning data corresponding to the CORS reference station based on a satellite positioning signal from a GNSS satellite received by the CORS reference station, the method further includes: acquiring a construction design file of an engineering project to be measured, determining a test position corresponding to data to be measured according to the engineering to be measured according to the construction design file, and marking the test position as a measurement point; installing the CORS mobile station at the measurement point.
A second aspect of the present invention provides a CORS system, including: the CORS system comprises at least one CORS reference station, at least one CORS mobile station and a server, wherein the CORS reference station, the CORS mobile station and the server are in communication connection based on a network; the CORS mobile station is used for receiving satellite positioning signals from GNSS satellites, analyzing the satellite signals to obtain first positioning data corresponding to the CORS reference station, and sending the first positioning data to a server; the CORS reference station is used for receiving satellite positioning signals from GNSS satellites, analyzing the satellite signals to obtain first positioning data corresponding to the CORS reference station, and sending the first positioning data to a server; the server is used for carrying out differential calculation on the first positioning data and the second positioning data through the server when receiving a measurement request sent by a user to obtain a position coordinate of the CORS mobile station; and determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.
Optionally, in a first implementation manner of the second aspect of the present invention, when the number of the at least one CORS reference station is at least two, and the number of the at least one CORS mobile station is one, the server includes: the distance calculation module is used for calculating the distance between the CORS mobile station and each CORS reference station according to the second positioning data and the first positioning data by using the server; the screening module is used for selecting a plurality of CORS reference stations meeting the conditions from at least two CORS reference stations according to the distance as target CORS reference stations, and extracting first positioning data corresponding to each target CORS reference station to obtain a target first positioning data set; and the difference calculation module is used for performing difference calculation according to the target first positioning data set and the second positioning data to obtain the position coordinate of the CORS mobile station.
Optionally, in a second implementation manner of the second aspect of the present invention, when the number of the target CORS reference stations is three, the difference calculating module includes: the first positioning data extraction unit is used for acquiring three synchronous target first positioning data of the three target CORS reference stations, wherein the target first positioning data comprises a precise ephemeris and a precise clock error; the triangular network determining unit is used for determining a triangular network area according to the three target CORS reference stations; a correction parameter determining unit, configured to perform difference processing on the three target first positioning data, and determine an area correction parameter of the triangular network area; the model simulation unit is used for simulating an error correction model of the triangular network area; the calculation execution unit is used for carrying out differential calculation according to the target first positioning data set and the second positioning data to obtain a calculation result; and the correcting unit is used for correcting the calculation result according to the error correction model of the triangular network area to obtain the position coordinate of the CORS mobile station.
Optionally, in a third implementation manner of the second aspect of the present invention, when the number of the target CORS reference stations is one, the difference calculating module includes: the sequencing unit is used for sequencing at least two CORS reference stations according to the distance to obtain a reference station distance sequence; and the screening unit is used for extracting the CORS reference station corresponding to the distance with the minimum distance in the reference station distance sequence, and taking the obtained corresponding CORS reference station as a target CORS reference station.
Optionally, in a fourth implementation manner of the second aspect of the present invention, the server further includes a coordinate type conversion module, where the coordinate type conversion module includes: the type extraction unit is used for acquiring the type of the position coordinate of the CORS mobile station and the type of the plane rectangular coordinate of the construction area; the conversion relation calculation unit is used for calculating the mathematical conversion relation between the type and the plane rectangular coordinate type; the coordinate conversion unit is used for converting the position coordinates of the measuring points according to the mathematical conversion relation to obtain a conversion coordinate result; and the result calculation unit is used for calculating an engineering measurement result according to the coordinate conversion result.
Optionally, in a fifth implementation manner of the second aspect of the present invention, the CORS system further includes a reference station installation module, where the reference station installation module is specifically configured to: acquiring a construction design file of an engineering measurement project, and determining the position of a reference point of the CORS reference station to be installed in a construction area according to the construction design file; collecting environmental data of the position of the reference point, and evaluating whether the environment is qualified or not; if the reference point is qualified, building a receiver support at the position of the reference point, and installing an outdoor receiver on the receiver support; installing an indoor server and connecting the indoor server with the outdoor receiver; and calling an indoor server to check the position of the outdoor receiver and a pre-established known position point to obtain a CORS reference station.
Optionally, in a sixth implementation manner of the second aspect of the present invention, the reference station installation module further includes an environment evaluation unit, where the environment evaluation unit is specifically configured to: erecting a ground type choke coil antenna at the position of the reference point, recording observation data of GNSS satellite signals for 24h at a sampling interval of 30s, and calling preset environment detection software to analyze the observation data to obtain a software detection result; if the software detection result is that the environmental data is qualified, judging that the environmental data is qualified; if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complexity and epoch With Data contained in the software detection result are in error, if not, checking the signal-to-noise ratio, and if the signal-to-noise ratio is within a preset signal-to-noise ratio threshold range, considering the environmental Data to be qualified; if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complete and epoch With Data contained in the software detection result are wrong, if so, calling preset environment detection software to analyze and obtain a retest result, and if the retest result is still failed, considering that the environment Data is unqualified.
Optionally, in a seventh implementation manner of the second aspect of the present invention, the CORS system is further configured to obtain a construction design file of an engineering project to be measured, determine, according to the construction design file, a test position corresponding to data to be measured according to the engineering to be measured, and mark the test position as a measurement point; installing the CORS mobile station at the measurement point.
In the technical scheme provided by the invention, a satellite positioning signal from a GNSS satellite is received based on a CORS reference station, and the satellite signal is analyzed to obtain first positioning data corresponding to the CORS reference station; receiving a satellite positioning signal from a GNSS satellite based on a CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal; when the server receives a measurement request sent by a user, the server performs differential calculation on the first positioning data and the second positioning data to obtain a position coordinate of the CORS mobile station; the position coordinates of each measuring point in the construction area are determined according to the position coordinates of the CORS mobile station, and the engineering measurement result requested by the measurement request is calculated according to the position coordinates of each measuring point, so that the influence of obstacles and weather on engineering measurement can be reduced, the measurement speed is increased, and the measurement precision is improved.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating a first embodiment of an engineering measurement method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of an engineering measurement method according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a third embodiment of an engineering measurement method according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a CORS system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of information processing of the CORS system in the embodiment of the present invention.
Detailed Description
In the technical scheme provided by the invention, a satellite positioning signal from a GNSS satellite is received based on a CORS reference station, and the satellite signal is analyzed to obtain first positioning data corresponding to the CORS reference station; receiving a satellite positioning signal from a GNSS satellite based on a CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal; when the server receives a measurement request sent by a user, the server performs differential calculation on the first positioning data and the second positioning data to obtain a position coordinate of the CORS mobile station; the position coordinates of each measuring point in the construction area are determined according to the position coordinates of the CORS mobile station, and the engineering measurement result requested by the measurement request is calculated according to the position coordinates of each measuring point, so that the influence of obstacles and weather on engineering measurement can be reduced, the measurement speed is increased, and the measurement precision is improved.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For convenience of understanding, a specific flow of an embodiment of the present invention is described below, and referring to fig. 1, an embodiment of an engineering measurement method in an embodiment of the present invention includes the following contents:
the engineering measurement method of this embodiment is a measurement method applied to a CORS system, where the CORS system includes at least one CORS reference station, at least one CORS mobile station, and a server, where the CORS reference station and the CORS mobile station are respectively disposed in a construction area corresponding to an engineering project to be measured, and the CORS mobile station corresponds to a measurement point in the construction area.
The CORS Reference station is a pre-established Reference station used as a Reference, wherein the CORS is an abbreviation of continuous Operating Reference states and represents a Continuously Operating (satellite positioning service) Reference station established by a multi-base station network RTK technology. The CORS system is a product of a multi-technology set such as a satellite positioning technology, a computer network technology, a digital communication technology and the like, and enlarges the coverage range, reduces the operation cost, improves the positioning precision and reduces the initialization time of positioning in engineering measurement. The RTK technology is Real-time kinematic, namely Real-time differential positioning, is a measuring method capable of obtaining centimeter-level positioning accuracy in Real time in the field, and greatly improves the field operation efficiency.
101. Receiving a satellite positioning signal from a GNSS satellite based on a CORS reference station, analyzing the satellite signal to obtain first positioning data corresponding to the CORS reference station, and sending the first positioning data to a server;
in this embodiment, a CORS single base station technology is taken as an example for explanation, the single base station refers to only one continuously operating CORS reference station, and this base station may also be used as a server to check the satellite state in real time, store static data, send differential information to the internet in real time, and monitor the operation condition of a CORS mobile station through software. The CORS mobile station communicates with the base station server in a GPRS and CDMA network communication mode. Before measurement, a CORS reference station is built in a position range to be subjected to engineering measurement, and the CORS reference station can be built in a small and medium-sized city only by less investment, so that the requirements of local measurement users on different levels of spatial information technology services are met: the method is characterized in that the rapid centimeter-level real-time positioning and post-differentiation are realized in urban areas, suburban areas, urban and rural areas of counties and towns in a range of 30 kilometers by taking the base station as a center along main traffic lines of the urban and suburban areas and urban and rural areas where the base station is located.
The single CORS reference station of this embodiment is constructed in the position scope department of waiting to carry out engineering survey, and this CORS reference station can have enough to meet the need the use many times after once throwing into earlier stage, moves equipment to next building site after the engineering to this has practiced thrift engineering cost when guaranteeing location measurement accuracy.
In the step, the CORS reference station continuously observes satellite signals of GNSS satellites to obtain local precise ephemeris and other correction parameters of the region and the time period, packages and stores static data according to user requirements, and sends the GNSS satellite information of the CORS reference station to a specified position of Eagle software on a server.
In this embodiment, the gnss (global Navigation Satellite system) is an acronym of the global Navigation Satellite system, which is a collective term for all global Navigation Satellite systems and their augmentation systems, and is a global-time radio Navigation system established by using all global Navigation satellites to cover the world. Currently available global satellite navigation systems are GPS in the united states and GLONASS in russia, BDS (beidou) in china and Galileo in europe.
102. Receiving a satellite positioning signal from a GNSS satellite based on a CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal;
determining a measuring point according to data to be measured in the engineering design file, placing a CORS mobile station at the measuring point, calling the CORS mobile station to receive a satellite positioning signal from a GNSS satellite, calculating second positioning data corresponding to the current CORS mobile station according to the satellite positioning signal, and sending the second positioning data to a server through a GPRS/CDMA data communication module.
103. When the server receives a measurement request sent by a user, the server performs differential calculation according to the first positioning data and the second positioning data to obtain a position coordinate of the CORS mobile station;
the user can operate on the CORS mobile station, a positioning acquisition request is sent to the server through a communication unit of the CORS mobile station, the first positioning data provided by the CORS reference station is acquired through the server, and the first positioning data and the second positioning data are input into the user unit for differential calculation to obtain the specific position coordinate of the CORS mobile station.
104. And determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.
After the position coordinates of the CORS mobile station are obtained, the position coordinates of the measuring point where the current mobile station is located can be determined. The position of the measuring point in the step is determined according to the content to be measured in the construction design file. As a specific example, when the content to be measured is the distance between two points, the measurement points are determined according to the positions of the two points, the CORS mobile stations are respectively located at two corresponding measurement points, the position coordinates of the measured measurement points are calculated according to the measurement request, and the specific distance between the two points to be obtained is calculated according to the obtained position coordinates of the two measurement points. In this embodiment, when performing specific measurement, one CORS mobile station may be used to respectively move to multiple measurement points to be measured to obtain position coordinates, or multiple CORS mobile stations may be used to simultaneously set to multiple different measurement points to be measured to obtain position coordinates. When a plurality of CORS mobile stations are arranged at different measuring points to be measured simultaneously to obtain position coordinates, if a plurality of CORS reference stations are included in a construction range, the CORS reference stations can be selected according to a preset reference station selection mode and first positioning data corresponding to the selected reference stations are obtained to obtain the position coordinates of the measuring points.
The method comprises the steps that signal exchange is carried out between a CORS base station and a satellite, and the position coordinates of a CORS mobile station and the position coordinates of a CORS reference station are determined, so that an engineering measurement result is calculated according to the tested position coordinates; the influence of obstacles and weather on engineering measurement can be reduced, and the measurement speed and the measurement precision are improved.
Referring to fig. 2, a second embodiment of the engineering measurement method according to the embodiment of the present invention includes:
201. acquiring a construction design file of an engineering measurement project, and determining the position of a reference point of a CORS reference station to be installed in a construction area according to the construction design file;
in this embodiment, first, a CORS reference station is addressed according to a construction design file, and the position of a reference point is determined.
Specifically, the CORS reference station site selection design principle is as follows:
(1) the distance from tall buildings, trees, water bodies, beaches and water accumulation areas far away from the periphery is not less than 200 m;
(2) the satellite perspective condition of the horizon height angle of more than 10 degrees is set;
(3) far away from electromagnetic interference areas (microwave stations, radio transmitting stations, high-voltage line crossing zones and the like) and lightning stroke areas, and the distance is not less than 200 m;
(4) avoiding places such as railways, roads and the like which are easy to vibrate;
(5) the CORS reference station should avoid the unstable region of the geological structure: the fault fracture zone is a place (such as mining area, oil and gas mining area, underground water funnel settlement area and the like) which is easy to generate local deformation such as landslide and subsidence, and is easy to be subjected to flooding or large underground water level change;
(6) facilitating access to a public communication network;
(7) the alternating current power supply has the advantages of stability, safety and reliability;
(8) and performing reconnaissance to confirm the bearing capacity of the station site, and finally setting the station site on a bearing force column or a bearing wall.
202. Collecting environmental data of the position of the reference point, and evaluating whether the environment is qualified or not;
203. if the standard is qualified, building a receiver bracket at the position of the reference point, and installing an outdoor receiver on the receiver bracket;
after the datum point is determined, the environment of the datum point is evaluated, whether the environment meets the principle or not is evaluated, and the ambient environmental interference is within the threshold range. And if the environmental evaluation result is qualified, building a CORS reference station at the position of the reference point.
The CORS reference station of the embodiment is composed of two parts, namely indoor equipment and outdoor equipment. Mainly comprises the following steps: lightning protection equipment, an external receiver (GNSS antenna), a server (computer), a display, external network equipment and an uninterruptible power supply.
Specifically, first, a receiver holder is mounted with the outdoor receiver. The support of this embodiment can be a cement buttress or a tripod, and this embodiment takes the tripod as an example to explain: the triangular supports are processed and welded by angle steel, the size of the bottom triangle can be set to be a right-angled isosceles triangle of 40 multiplied by 40(cm), the height of the bottom triangle is 40cm, and the triangle at the upper part is welded with a centering disc and fixed at a selected datum point.
And then, the outdoor receiver is connected to the cement pier or the tripod centering plate by using a connecting bolt, one end of the GPS signal line is connected to the outdoor receiver, and the other end of the GPS signal line is connected to the indoor CORS host machine along the edge of the roof. The GPS signal line exposed outdoors must be sleeved with a PVC protective sleeve to prolong the service life of the GPS signal line, the PVC protective sleeve can adopt a PVC pipe with the diameter of 2 cm-5 cm, the connection part adopts a special PVC pipe joint for connection, and the PVC protective sleeve is fixed by a corresponding nail line card.
204. Installing an indoor server and connecting the indoor server with an outdoor receiver;
205. calling an indoor server to check the position of the outdoor receiver and a pre-established known position point to obtain a CORS reference station;
the indoor equipment comprises a server (computer), a display, a CORS host, a UPS relay, a wireless router, a cabinet and the like, and the specific connection relation is as follows:
(1) the server needs to ensure continuous long-time startup operation;
(2) the indoor equipment is collected in a cabinet;
(3) the special network cable is connected to the network interface of the server, one end of the special network cable is connected to the other network interface of the server, and the other end of the special network cable is connected to the network interface of the CORS host. If the computer host is used as a server, a router (or a wireless router) is required to be used as an adapter, a special network cable is connected to a WAN port of the router, one end of each of two network cables is connected to the router, and the other end of each of the two network cables is connected to the computer host and the CORS host respectively;
(4) the cabinet power supply is connected to the UPS relay, so that the server can keep a working state for a period of time after power failure; or a storage battery is connected to the UPS relay for continuous power supply;
(5) the indoor CORS host and the network cable connector are connected to the ground.
And debugging the server after the installation is finished, and obtaining the built CORS reference station after the debugging is finished.
206. Receiving a satellite positioning signal from a GNSS satellite based on a CORS reference station, and analyzing the satellite signal to obtain first positioning data corresponding to the CORS reference station;
in this embodiment, the number of the CORS reference stations is at least two, and each CORS reference station receives a satellite positioning signal from a GNSS satellite and analyzes the satellite signal to obtain first positioning data corresponding to the CORS reference station. The first positioning data correspond to the CORS reference stations one by one, and after the first positioning data are obtained, the first positioning data are sent to the server.
207. Receiving a satellite positioning signal from a GNSS satellite based on a CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal;
determining a measuring point according to data to be measured in the engineering design file, placing a CORS mobile station at the measuring point, calling the CORS mobile station to receive a satellite positioning signal from a GNSS satellite, calculating second positioning data corresponding to the current CORS mobile station according to the satellite positioning signal, and sending the second positioning data to a server through a GPRS/CDMA data communication module.
208. Calculating the distance between the CORS mobile station and each CORS reference station by using the server according to the second positioning data and the first positioning data;
according to the foregoing steps, there are at least two CORS reference stations in this embodiment, and there are at least two first positioning data, then the distance between the CORS mobile station and each CORS reference station in this embodiment is analyzed according to the second positioning data and each first positioning data, and each CORS reference station is sorted according to the distance between the middle CORS mobile station and each CORS reference station, so as to obtain a CORS reference station sequence.
209. Selecting a plurality of CORS reference stations meeting the conditions from at least two CORS reference stations according to the distance as target CORS reference stations, and extracting first positioning data corresponding to each target CORS reference station to obtain a target first positioning data set;
and extracting a target CORS reference station closest to the CORS mobile station from the CORS reference station sequence as a target CORS reference station, extracting first positioning data corresponding to the target CORS reference station to obtain target first positioning data, and performing specific calculation according to the target first positioning data in subsequent steps.
210. Performing differential calculation according to the first positioning data set and the second positioning data of the target to obtain a position coordinate of the CORS mobile station;
and performing difference calculation according to the first positioning data and the second positioning data of the target to determine the position coordinate of the CORS mobile station. Specifically, the specific formula of the calculation is as follows:
Figure BDA0003343614670000121
wherein the content of the first and second substances,
Figure BDA0003343614670000122
representing a phase measurement; ρ represents the geometric distance between the satellites; c represents the speed of light; dTRepresenting the receiver clock error; dtRepresenting the satellite clock error; λ represents the carrier phase wavelength; n represents the whole week unknown number; dtropRepresenting tropospheric refraction effects; dionRepresenting ionospheric refraction effects; dprealThe effect of the relativity theory is shown,
Figure BDA0003343614670000123
representing the observed noise.
211. Acquiring the type of the position coordinate of the CORS mobile station and the type of the plane rectangular coordinate of the construction area;
212. calculating a mathematical transformation relation between the type of the position coordinate and the type of the rectangular coordinate of the local plane;
213. converting the position coordinates of each measuring point according to the mathematical conversion relation to obtain a conversion coordinate result;
214. and calculating an engineering measurement result according to the coordinate conversion result.
The position coordinates of the measurement point are determined according to the position coordinates of the CORS mobile station obtained in the foregoing, wherein the position coordinates include a plurality of different coordinate types, and when the GNSS satellite is the GPS satellite in this embodiment, the position coordinates of the CORS mobile station obtained in this embodiment is WGS84 coordinates. And obtaining the rectangular coordinate type of the local plane to be used in the embodiment, and calculating the mathematical transformation relation between the position coordinate type and the rectangular coordinate type of the local plane
The data collected by the GPS satellite positioning system in engineering applications is WGS84 coordinate system data, and the current work summary measurement result is commonly used in the coordinate data based on the beijing coordinate system or the local (arbitrary or local) independent coordinate system in 1954. It is therefore necessary to convert the WGS84 coordinates to the BJ-54 coordinate system or to a local (arbitrary) independent coordinate system. Converting the GPS coordinate system to our local plane coordinate system includes: reference conversion, projection, horizontal and vertical adjustment. And finally, obtaining a coordinate conversion result, and calculating an engineering measurement result according to the coordinate conversion result.
The method comprises the steps that signal exchange is carried out between a CORS base station and a satellite, and the position coordinates of a CORS mobile station and a target CORS reference station are determined, so that an engineering measurement result is calculated according to the tested position coordinates; the influence of obstacles and weather on engineering measurement can be reduced, and the measurement speed and the measurement precision are improved.
Referring to fig. 3, a third embodiment of the engineering measurement method according to the embodiment of the present invention includes:
301. acquiring a construction design file of an engineering measurement project, and determining the position of a reference point of a CORS reference station to be installed in a construction area according to the construction design file;
the specific content in this step is substantially the same as that in step 201 in the previous embodiment, and therefore, the detailed description thereof is omitted.
302. Collecting environmental data of the position of the reference point, and evaluating whether the environment is qualified or not;
after the specific position of the reference point is determined, the environment of the reference point needs to be evaluated, whether the environment meets the principle or not is evaluated, and the ambient environmental interference is within the threshold range.
Specifically, in the step, a geodetic choke coil antenna is erected at the position of the reference point, is connected with a CORS host, records observation data of GNSS satellite signals for 24h at sampling intervals of 30s, and analyzes the observation data by using preset environment detection software;
if the environmental data are detected by preset environmental detection software, the environmental data are considered to be qualified, wherein the environmental detection software can be QC software;
if the environmental Data are not detected by preset environmental detection software, obtaining a detection result, judging whether four indexes including Cycle Slips, Multipath, Data complexity and epoch With Data contained in the detection result are wrong or not, if the four indexes are not wrong, checking a signal-to-noise ratio by combining NOVATEL CDU software, and if the signal-to-noise ratio is within a preset signal-to-noise ratio threshold range, considering the environmental Data to be qualified;
if the detection is not passed through the preset environment detection software, obtaining a detection result, judging whether the four indexes of Cycle Slips, Multipath, Data Completeness and Epochs With Data contained in the detection result are wrong, if so, retesting and obtaining a retesting result, and if the retesting result is still failed, determining that the environment is not suitable for building the station due to large interference.
303. If the standard is qualified, building a receiver bracket at the position of the reference point, and installing an outdoor receiver on the receiver bracket;
304. installing an indoor server and connecting the indoor server with an outdoor receiver;
305. calling an indoor server to check the position of the outdoor receiver and a pre-established known position point to obtain a CORS reference station;
the contents of steps 303 to 305 in this embodiment are substantially the same as those of steps 203 to 205 in the previous embodiment, and therefore, the description thereof is omitted.
306. Receiving a satellite positioning signal from a GNSS satellite based on a CORS reference station, analyzing the satellite signal to obtain first positioning data corresponding to the CORS reference station, and sending the first positioning data to a server;
the embodiment is described with the number of the CORS reference stations being at least three; each CORS reference station described in this embodiment receives a satellite positioning signal from a GNSS satellite, and analyzes the satellite signal to obtain first positioning data corresponding to the CORS reference station. The first positioning data correspond to the CORS reference stations one by one, and after the first positioning data are obtained, the first positioning data are sent to the server. And forming a triangular network, a geodesic network, a ribbon network, a ring network or a star network and the like according to the ages of the trees of the CORS reference stations so as to improve the positioning accuracy.
In this embodiment, when the number of the CORS reference stations is at least three, the three closest CORS reference stations around the CORS mobile station are determined according to the first positioning data of each CORS reference station, a triangular network area is formed according to the three CORS reference stations, and the position of the subsequent CORS mobile station is specifically determined according to the first positioning information of the three CORS reference stations.
307. Receiving a satellite positioning signal from a GNSS satellite based on a CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal;
determining a measuring point according to data to be measured in the engineering design file, placing a CORS mobile station at the measuring point, calling the CORS mobile station to receive a satellite positioning signal from a GNSS satellite, calculating second positioning data corresponding to the current CORS mobile station according to the satellite positioning signal, and sending the second positioning data to a server through a GPRS/CDMA data communication module.
308. When a server receives a measurement request sent by a user, acquiring three synchronous target first positioning data of three target CORS reference stations;
309. determining a triangular network area according to the three target CORS reference stations;
310. carrying out differential processing on the first positioning data of the three targets to determine area correction parameters of the triangular network area;
311. simulating an error correction model of a triangular network area;
312. performing differential calculation according to the first positioning data set and the second positioning data of the target to obtain a calculation result;
313. correcting the calculation result according to the error correction model of the triangular network area to obtain the position coordinate of the CORS mobile station;
in the embodiment, the triangular network CORS is adopted for measurement, the reference stations can be uniformly and sparsely distributed in a larger range, the real-time observation data of the reference station network is utilized to carry out system error modeling on the coverage area, then the system error of the observation data of the flow user stations in the area is estimated, the influence of the system error is eliminated as far as possible, centimeter-level real-time positioning results are obtained, the precision coverage range of the network RTK technology is greatly enlarged, and the precision distribution is uniform.
Specifically, when a triangulation network is used in measurement calculation, the target first positioning data includes a precise ephemeris and a precise clock error; and acquiring synchronous observed values of three reference stations with the closest distance by adopting a precise ephemeris and a precise clock error for differential processing, generating a group of area correction parameters for each triangle, and simulating a comprehensive error correction model in the area through a triangulation network. The model coverage includes 30 km inside and outside the triangle.
And optimizing comprehensive error models such as an ionosphere, a troposphere, an orbit error and the like by using a plurality of CORS reference station observation data, and continuously monitoring the integrity of the reference station data. During operation, the rover station needs to send point location information (GGA data) to the central control center through a GPRS, CDMA and other types of bidirectional data communication devices. The system calculates the GPS orbit error, the error caused by ionosphere, troposphere and atmospheric refraction of the point according to the position of the rover station, and sends the comprehensive error corrected by the position to the CORS rover station. The effect is equivalent to generating a 'virtual reference station' at the mobile station position to carry out short-baseline solution. The rover station realizes the real-time differential positioning by using the correction number of the comprehensive error sent back by the central control system.
In addition, in the embodiment, when the position coordinates of the CORS mobile station are calculated according to the selected target CORS reference station, when the number of the target CORS reference stations is three, the number of the obtained calculation results is three, and the obtained calculation results are corrected and the offset degree of the obtained results is calculated; and screening the calculation result according to the obtained offset degree to obtain the final position coordinate of the CORS mobile station.
314. And determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.
After the position coordinates of the CORS mobile station are obtained, the position coordinates of the preset measuring points can be determined. The position coordinates of the measuring points in the step are determined according to the content to be measured in the construction design file.
The method and the device have the advantages that the CORS base station and the satellite are used for carrying out signal exchange, the position coordinates of the CORS mobile station and the target CORS reference station are determined, errors are further reduced through the positioning data of the plurality of target CORS reference stations, so that engineering measurement results are calculated according to the tested position coordinates, and results in a required coordinate system can be automatically calculated; the influence of obstacles and weather on engineering measurement can be reduced, and the measurement speed and the measurement precision are improved.
With reference to fig. 4 and 5, the engineering measurement method in the embodiment of the present invention is described above, and a CORS system in the embodiment of the present invention is described below, where an embodiment of the CORS system in the embodiment of the present invention includes:
at least one CORS reference station 401, a server 402 and at least one CORS mobile station 403 which realize communication connection based on a network;
the CORS mobile station 403 is configured to receive a satellite positioning signal from a GNSS satellite, analyze the satellite signal to obtain first positioning data corresponding to the CORS reference station 401, and send the first positioning data to the server 402;
the CORS reference station 401 is configured to receive a satellite positioning signal from a GNSS satellite, analyze the satellite signal to obtain first positioning data corresponding to the CORS reference station 401, and send the first positioning data to the server 402;
the server 402 is configured to perform differential calculation on the first positioning data and the second positioning data through the server 402 when receiving a measurement request sent by a user, so as to obtain a position coordinate of the CORS mobile station 403; and determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station 403, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.
In another embodiment of the present application, when the number of the at least one CORS reference station 401 is at least two, and the number of the at least one CORS mobile station 403 is one, the server 402 includes:
a distance calculating module, configured to calculate, by using the server 402, a distance between the CORS mobile station 403 and each CORS reference station 401 according to the second positioning data and the first positioning data;
the screening module is used for selecting a plurality of CORS reference stations 401 meeting the conditions from at least two CORS reference stations 401 according to the distance as target CORS reference stations 401, and extracting first positioning data corresponding to each target CORS reference station 401 to obtain a target first positioning data set;
and a difference calculation module, configured to perform difference calculation according to the target first positioning data set and the second positioning data, so as to obtain a position coordinate of the CORS mobile station 403.
In another embodiment of the present application, when the number of the plurality of target CORS reference stations 401 is three, the difference calculating module includes:
a first positioning data extracting unit, configured to obtain three synchronous target first positioning data of the target CORS reference station 401, where the target first positioning data includes a precise ephemeris and a precise clock error;
a triangular network determining unit, configured to determine a triangular network area according to the three target CORS reference stations 401;
a correction parameter determining unit, configured to perform difference processing on the three target first positioning data, and determine an area correction parameter of the triangular network area;
the model simulation unit is used for simulating an error correction model of the triangular network area;
the calculation execution unit is used for carrying out differential calculation according to the target first positioning data set and the second positioning data to obtain a calculation result;
and a correcting unit, configured to correct the calculation result according to the error correction model in the triangulation network area, to obtain the position coordinate of the CORS mobile station 403.
In another embodiment of the present application, when the number of the plurality of target CORS reference stations 401 is one, the difference calculating module includes:
the sequencing unit is used for sequencing at least two CORS reference stations 401 according to the distance to obtain a reference station distance sequence;
and the screening unit is used for extracting the CORS reference station 401 corresponding to the distance with the minimum distance in the reference station distance sequence, and taking the obtained corresponding CORS reference station 401 as the target CORS reference station 401.
In another embodiment of the present application, the server 402 further comprises a coordinate type conversion module, which comprises:
a type extraction unit, configured to obtain a type of the position coordinate of the CORS mobile station 403 and a type of a plane rectangular coordinate of the construction area;
the conversion relation calculation unit is used for calculating the mathematical conversion relation between the type and the plane rectangular coordinate type;
the coordinate conversion unit is used for converting the position coordinates of the measuring points according to the mathematical conversion relation to obtain a conversion coordinate result;
and the result calculation unit is used for calculating an engineering measurement result according to the coordinate conversion result.
In another embodiment of the present application, the CORS system further includes a reference station installation module, where the reference station installation module is specifically configured to:
acquiring a construction design file of an engineering measurement project, and determining the position of a reference point of the CORS reference station 401 to be installed in a construction area according to the construction design file;
collecting environmental data of the position of the reference point, and evaluating whether the environment is qualified or not;
if the reference point is qualified, building a receiver support at the position of the reference point, and installing an outdoor receiver on the receiver support;
installing an indoor server and connecting the indoor server with the outdoor receiver;
and calling an indoor server to check the position of the outdoor receiver and a pre-established known position point to obtain a CORS reference station 401.
In another embodiment of the present application, the reference station installation module further includes an environment evaluation unit, where the environment evaluation unit is specifically configured to:
erecting a ground type choke coil antenna at the position of the reference point, recording observation data of GNSS satellite signals for 24h at a sampling interval of 30s, and calling preset environment detection software to analyze the observation data to obtain a software detection result;
if the software detection result is that the environmental data is qualified, judging that the environmental data is qualified;
if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complexity and epoch With Data contained in the software detection result are in error, if not, checking the signal-to-noise ratio, and if the signal-to-noise ratio is within a preset signal-to-noise ratio threshold range, considering the environmental Data to be qualified;
if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complete and epoch With Data contained in the software detection result are wrong, if so, calling preset environment detection software to analyze and obtain a retest result, and if the retest result is still failed, considering that the environment Data is unqualified.
In another embodiment of the application, the CORS system is further configured to obtain a construction design file of an engineering project to be measured, determine a test position corresponding to data to be measured according to the engineering project to be measured according to the construction design file, and mark the test position as a measurement point; the CORS mobile station 403 is installed at the measurement point.
The method and the device have the advantages that the CORS base station and the satellite are used for carrying out signal exchange, the position coordinates of the CORS mobile station and the target CORS reference station are determined, errors are further reduced through the positioning data of the plurality of target CORS reference stations, so that engineering measurement results are calculated according to the tested position coordinates, and results in a required coordinate system can be automatically calculated; the influence of obstacles and weather on engineering measurement can be reduced, and the measurement speed and the measurement precision are improved.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. An engineering measurement method is applied to a CORS system, and is characterized in that the CORS system comprises at least one CORS reference station, at least one CORS mobile station and a server, wherein the CORS reference station and the CORS mobile station are respectively arranged in a construction area corresponding to an engineering project to be measured, the CORS mobile station corresponds to a measurement point in the construction area, and the engineering measurement method comprises the following steps:
receiving a satellite positioning signal from a GNSS satellite based on the CORS reference station, and analyzing the satellite signal to obtain first positioning data corresponding to the CORS reference station;
receiving a satellite positioning signal from the GNSS satellite based on the CORS mobile station, and calculating second positioning data corresponding to the CORS mobile station according to the satellite positioning signal;
when the server receives a measurement request sent by a user, the server performs differential calculation on the first positioning data and the second positioning data to obtain a position coordinate of the CORS mobile station;
and determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.
2. The engineering measurement method according to claim 1, wherein when the number of the at least one CORS reference station is at least two and the number of the at least one CORS mobile station is one, the obtaining, by the server, the position coordinates of the CORS mobile station by performing the differential calculation on the first positioning data and the second positioning data comprises:
calculating the distance between the CORS mobile station and each CORS reference station by using the server according to the second positioning data and the first positioning data;
selecting a plurality of CORS reference stations meeting the conditions from at least two CORS reference stations according to the distance as target CORS reference stations, and extracting first positioning data corresponding to each target CORS reference station to obtain a target first positioning data set;
and carrying out differential calculation according to the first positioning data set and the second positioning data of the target to obtain the position coordinate of the CORS mobile station.
3. The method of claim 2, wherein when the number of the plurality of target CORS reference stations is three, the obtaining the position coordinates of the CORS mobile station by performing the differential calculation according to the target first positioning data set and the second positioning data comprises:
acquiring three synchronous target first positioning data of three target CORS reference stations, wherein the target first positioning data comprises a precise ephemeris and a precise clock error;
determining a triangular network area according to the three target CORS reference stations;
carrying out difference processing on the three target first positioning data to determine an area correction parameter of the triangular network area;
simulating an error correction model of the triangular network area;
performing differential calculation according to the first positioning data set and the second positioning data of the target to obtain a calculation result;
and correcting the calculation result according to the error correction model of the triangular network area to obtain the position coordinate of the CORS mobile station.
4. The engineering measurement method according to claim 2, wherein when the number of the target CORS reference stations is one, the selecting a plurality of CORS reference stations satisfying a condition from at least two CORS reference stations according to the distance as target CORS reference stations, and extracting first positioning data corresponding to each target CORS reference station to obtain a target first positioning data set comprises:
sequencing at least two CORS reference stations according to the distance to obtain a reference station distance sequence;
and extracting the CORS reference station corresponding to the distance with the minimum distance in the reference station distance sequence, and taking the obtained corresponding CORS reference station as a target CORS reference station.
5. The engineering measurement method according to any one of claims 1 to 4, wherein the calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measurement point comprises:
acquiring the type of the position coordinate of the CORS mobile station and the type of the plane rectangular coordinate of the construction area;
calculating a mathematical transformation relation between the type and the plane rectangular coordinate type;
converting the position coordinates of the measuring points according to the mathematical conversion relation to obtain a conversion coordinate result;
and calculating an engineering measurement result according to the coordinate conversion result.
6. The engineering survey method of claim 5, further comprising, prior to receiving satellite positioning signals from GNSS satellites based on the CORS reference station:
acquiring a construction design file of an engineering measurement project, and determining the position of a reference point of the CORS reference station to be installed in a construction area according to the construction design file;
collecting environmental data of the position of the reference point, and evaluating whether the environment is qualified or not;
if the reference point is qualified, building a receiver support at the position of the reference point, and installing an outdoor receiver on the receiver support;
installing an indoor server and connecting the indoor server with the outdoor receiver;
and calling an indoor server to check the position of the outdoor receiver and a pre-established known position point to obtain a CORS reference station.
7. The engineering measurement method of claim 6, wherein the collecting environmental data of the location of the reference point and evaluating whether the environment is qualified comprises:
erecting a ground type choke coil antenna at the position of the reference point, recording observation data of GNSS satellite signals for 24h at a sampling interval of 30s, and calling preset environment detection software to analyze the observation data to obtain a software detection result;
if the software detection result is that the environmental data is qualified, judging that the environmental data is qualified;
if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complexity and epoch With Data contained in the software detection result are in error, if not, checking the signal-to-noise ratio, and if the signal-to-noise ratio is within a preset signal-to-noise ratio threshold range, considering the environmental Data to be qualified;
if the software detection result is failed, analyzing the software detection result, judging whether the four indexes of Cycle Slips, Multipath, Data complete and epoch With Data contained in the software detection result are wrong, if so, calling preset environment detection software to analyze and obtain a retest result, and if the retest result is still failed, considering that the environment Data is unqualified.
8. The surveying method according to claim 7, wherein before the analyzing the satellite signal based on the satellite positioning signal from the GNSS satellite received by the CORS reference station to obtain the first positioning data corresponding to the CORS reference station, the surveying method further comprises:
acquiring a construction design file of an engineering project to be measured, determining a test position corresponding to data to be measured according to the engineering to be measured according to the construction design file, and marking the test position as a measurement point;
installing the CORS mobile station at the measurement point.
9. A CORS system, comprising: the CORS system comprises at least one CORS reference station, at least one CORS mobile station and a server, wherein the CORS reference station, the CORS mobile station and the server are in communication connection based on a network;
the CORS mobile station is used for receiving satellite positioning signals from GNSS satellites, analyzing the satellite signals to obtain first positioning data corresponding to the CORS reference station, and sending the first positioning data to a server;
the CORS reference station is used for receiving satellite positioning signals from GNSS satellites, analyzing the satellite signals to obtain first positioning data corresponding to the CORS reference station, and sending the first positioning data to a server;
the server is used for carrying out differential calculation on the first positioning data and the second positioning data through the server when receiving a measurement request sent by a user to obtain a position coordinate of the CORS mobile station; and determining the position coordinates of each measuring point in the construction area according to the position coordinates of the CORS mobile station, and calculating the engineering measurement result requested by the measurement request according to the position coordinates of each measuring point.
10. A CORS system according to claim 9, characterized in that when the number of said at least one CORS reference stations is at least two and the number of said at least one CORS mobile stations is one, said server comprises:
the distance calculation module is used for calculating the distance between the CORS mobile station and each CORS reference station according to the second positioning data and the first positioning data by using the server;
the screening module is used for selecting a plurality of CORS reference stations meeting the conditions from at least two CORS reference stations according to the distance as target CORS reference stations, and extracting first positioning data corresponding to each target CORS reference station to obtain a target first positioning data set;
and the difference calculation module is used for performing difference calculation according to the target first positioning data set and the second positioning data to obtain the position coordinate of the CORS mobile station.
CN202111315841.8A 2021-11-08 2021-11-08 Engineering measurement method and CORS system Pending CN114167461A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116520367A (en) * 2023-07-04 2023-08-01 深圳市天龙世纪科技发展有限公司 Satellite positioning security method and device based on Internet of things, electronic equipment and medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116520367A (en) * 2023-07-04 2023-08-01 深圳市天龙世纪科技发展有限公司 Satellite positioning security method and device based on Internet of things, electronic equipment and medium
CN116520367B (en) * 2023-07-04 2023-09-08 深圳市天龙世纪科技发展有限公司 Satellite positioning security method and device based on Internet of things, electronic equipment and medium

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