Beidou-based airborne geophysical prospecting data transmission system and method

Abstract

The invention relates to the related technical field of airborne geophysical prospecting, in particular to an airborne geophysical prospecting data transmission system and method based on Beidou. The Beidou-based airborne geophysical prospecting data transmission system comprises an antenna, a Beidou main control unit, a data acquisition system and a ground difference module, wherein the antenna, the Beidou main control unit and the data acquisition system are arranged on the detection equipment; the antenna is used for receiving and transmitting Beidou satellite signals; the Beidou main control unit processes Beidou satellite signals; the antenna, the Beidou main control unit and the ground differential module realize positioning and time service of the detection equipment by means of a Beidou satellite; and the data acquisition system is used for acquiring detection data and sending the detection data to a preset communication opposite end through a Beidou satellite.

Description

Technical Field

[0001] The present application relates to the technical field related to aerial geophysical exploration, and specifically to a Beidou-based aerial geophysical exploration data transmission system and method. Background Art

[0002] Airborne geophysical prospecting is a geophysical prospecting method that uses detection instruments and equipment carried by aircraft to measure changes in geophysical fields from the air in order to conduct geological structure surveys and mineral resource exploration. With the advancement of technology, airborne geophysical prospecting has become an important technical means in the fields of uranium exploration. The navigation and positioning system of airborne geophysical prospecting flight operations has also developed and updated, from the initial visual navigation and Doppler navigation systems to today's airborne geophysical field that mainly relies on the GPS system. There is a lack of airborne geophysical prospecting methods that are independent of the GPS system. Summary of the invention

[0003] In view of this, the embodiments of the present application are directed to providing a Beidou-based aerial geophysical data transmission system and method.

[0004] This application provides an aerial geophysical data transmission system based on Beidou, including:

[0005] Antenna, Beidou main control unit, data acquisition system and ground differential module;

[0006] Wherein, the antenna, Beidou main control unit and data acquisition system are arranged on the detection equipment;

[0007] The antenna is used to transmit and receive Beidou satellite signals;

[0008] The Beidou main control unit processes Beidou satellite signals;

[0009] The antenna, the Beidou main control unit and the ground differential module realize the positioning and timing of the detection equipment with the help of Beidou satellites;

[0010] The data acquisition system is used to collect detection data and send the detection data to a preset communication peer via a Beidou satellite.

[0011] In some embodiments, the Beidou main control unit includes: a Beidou short message chip, a Beidou positioning and timing chip, and a main control module;

[0012] The Beidou short message chip is used to assist the main control module in providing communication functions;

[0013] The Beidou positioning and timing chip is used to assist the main control module in achieving high-precision positioning and time synchronization functions.

[0014] In some embodiments, it further includes: a GPRS module;

[0015] The Beidou-based aerial geophysical data transmission system is based on the GPRS module and the preset communication peer communication connection.

[0016] In some embodiments, the Beidou main control unit further includes: a storage module and a host computer module;

[0017] The storage module is used to store positioning and timing data;

[0018] The host computer module is used to convert the positioning and timing data format into the standard data format required for aerial geophysical exploration, and analyze and process the detection data.

[0019] In some embodiments, the detection equipment is an aerial aeromagnetic measurement system.

[0020] The present application provides an aerial geophysical data transmission method based on Beidou, characterized in that it is applied to the above-mentioned aerial geophysical data transmission system based on Beidou, and the aerial geophysical data transmission method based on Beidou includes:

[0021] The antenna receives the signal sent by the Beidou satellite and transmits it to the Beidou positioning and timing chip, which further transmits the signal to the main control module;

[0022] The main control module analyzes the collected signals to obtain information such as the geographical coordinates of the detection equipment, the current accurate time, and the number of Beidou satellites that can be searched at the current location;

[0023] The main control module converts information such as the geographical coordinates of the detection equipment, the current accurate time, and the number of Beidou satellites that can be searched at the current location into a preset standard format required for aerial geophysical exploration for use.

[0024] In some embodiments, it also includes:

[0025] The main control module uses the PPP-B2b method to achieve centimeter-level positioning, and uses the ground differential station and real-time dynamic carrier phase differential technology to perform clock correction and positioning correction on the collected signals and generate correction numbers.

[0026] In some embodiments, it also includes:

[0027] Based on the GPRS module and the preset communication peer communication connection: at the same time, the detection data is sent to the preset communication peer via the Beidou satellite.

[0028] In some embodiments, it also includes:

[0029] Perform self-startup self-test, antenna inspection and collection of related parameters.

[0030] In some embodiments, the self-startup self-check, antenna check and collection of related parameters include:

[0031] Perform parameter initialization and initialization;

[0032] The information sent back by the Beidou chip will be analyzed to determine whether the antenna is working normally, whether a short circuit or open circuit occurs, and the inspection results will be displayed in the preset acquisition system interface; the interface display is real-time, thereby preventing the abnormal working state of the antenna from causing a lagging effect on the airborne geophysical data acquisition system;

[0033] When more than two satellites are stably searched, the Beidou positioning and timing chip obtains the current time data;

[0034] When more than three satellites are stably searched, the Beidou positioning and timing chip can obtain the current position data, extract the longitude and latitude information, calculate the current central longitude, and convert the longitude and latitude into kilometer network data;

[0035] Obtain external control instructions, and control the operating status and collection content of the system based on the external control instructions.

[0036] The present application provides a Beidou-based airborne geophysical data transmission system, including: an antenna, a Beidou main control unit, a data acquisition system and a ground differential module; wherein the antenna, the Beidou main control unit and the data acquisition system are arranged on the detection equipment; the antenna is used to send and receive Beidou satellite signals; the Beidou main control unit processes Beidou satellite signals; the antenna, the Beidou main control unit and the ground differential module use Beidou satellites to achieve positioning and timing of the detection equipment; the data acquisition system is used to collect detection data and send the detection data to a preset communication peer via Beidou satellites. With such a setting, in areas such as uranium exploration involving important national resources and security, the use of an autonomous and controllable Beidou system can better protect sensitive data such as mineral information, prevent the risk of data leakage or malicious interference due to reliance on foreign technology, and ensure the country's information security and independence in the field of airborne geophysical exploration. When faced with changes in the international situation or other emergencies that make the traditional navigation and positioning system unavailable, the Beidou-based aerogeophysical data transmission system can serve as a reliable backup plan to ensure that aerogeophysical work continues to be completed with high quality and efficiency, enhancing the emergency support capability of aerogeophysical operations in a complex international environment, and helping to maintain the country's strategic stability in resource exploration and other aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0038] Figure 1 It is a structural diagram of a Beidou-based aerial geophysical data transmission system provided by an embodiment of the present application.

[0039] Figure 2 It is a partial structural diagram of a Beidou-based aerial geophysical data transmission system provided by an embodiment of the present application.

[0040] Figure 3 It is a flowchart of a Beidou-based aerial geophysical data transmission method provided by an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Application Overview

[0043] Airborne geophysical prospecting refers to the use of special detection instruments and equipment carried by aircraft to measure the changes of various physical fields of the earth from the air to conduct geological structure surveys and find mineral deposits. It is an important technical means for uranium exploration. After more than 60 years of development, domestic airborne geophysical prospecting has formed an airborne geophysical prospecting technology system with Chinese characteristics (method theory-instrument development-system integration-data acquisition-data processing-data interpretation and application), and has formed airborne geophysical prospecting operation capabilities covering all regions from oceans to plateaus. The navigation and positioning system for airborne geophysical prospecting flight operations has also developed and updated accordingly. The development of airborne geophysical GPS can be traced back to the successful launch of the first GPS satellite in 1983. As time goes by, the GPS system has gradually matured and begun to open up to the civilian field. In the 1980s, the GPS system began to be introduced into my country's airborne geophysical prospecting field, and gradually replaced the original navigation and positioning equipment, providing strong support for my country's airborne geophysical prospecting field. At present, the airborne geophysical prospecting positioning system is basically completely dependent on foreign technology, and the airborne geophysical prospecting positioning system with independent and autonomous capabilities is still in its infancy. Therefore, it is necessary to develop an autonomous and controllable airborne geophysical prospecting navigation and positioning system.

[0044] The Global Navigation Satellite System (GNSS) refers to a navigation and positioning system that uses navigation satellites in space to provide users with all-weather three-dimensional coordinates, three-dimensional speed and time information at any location on the Earth's surface, near-Earth space and Earth orbit. The main functions of GNSS include establishing and maintaining a high-precision global coordinate reference frame based on a series of station observation data. Currently, GNSS has been widely used in many fields such as space science, aerospace engineering, and earthquake disaster warning. At present, GNSS mainly includes China's BeiDou Navigation Satellite System (BDS), the United States' Global Positioning System (GPS), Russia's Global Navigation Satellite System (GLONASS) and the European Union's Galileo Navigation Satellite System (GALILEO).

[0045] In summary, the application of the domestic Beidou satellite navigation system in the field of aerogeophysical prospecting is still in a relatively early stage. Most of the global navigation and positioning systems used in existing aerogeophysical surveying systems are GPS, which is essentially a US military technology. Over-reliance on it is not conducive to national information security. In addition, in the field of uranium exploration, the location information of minerals, mineral distribution, etc. are highly sensitive information. The use of a completely autonomous and controllable Beidou system can better protect mineral information. At the same time, a new technical solution and means are provided for aerogeophysical navigation and positioning work, ensuring the high-quality and efficient completion of aerogeophysical work, and ensuring the independence and security of the country in the field of aerogeophysical uranium exploration. Therefore, the present invention studies the "Beidou III" positioning, timing and short message system, designs its software and hardware, and loads it to realize the application of the Beidou satellite navigation system in aerogeophysical prospecting.

[0046] After introducing the basic principles of the present application, various non-limiting embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0047] Exemplary Systems

[0048] Figure 1 FIG. 1 is a flowchart of a Beidou-based airborne geophysical data transmission system provided by an embodiment of the present application. Figure 1 As shown, the method includes the following contents.

[0049] Antenna 1, Beidou main control unit 2, data acquisition system 3 and ground differential module 4;

[0050] Wherein, the antenna is arranged outside the aircraft cabin, and the Beidou main control unit and the data acquisition system are arranged in the aerial aeromagnetic measurement system;

[0051] The antenna is used to transmit and receive Beidou satellite signals;

[0052] The Beidou main control unit processes Beidou satellite signals;

[0053] The antenna, the Beidou main control unit and the ground differential module realize the positioning and timing of the detection equipment with the help of Beidou satellites;

[0054] The data acquisition system is used to collect detection data and send the detection data to a preset communication peer via a Beidou satellite.

[0055] Specifically, the airborne geophysical data transmission system is a comprehensive architecture, with multiple key components working together to achieve efficient collection and transmission of airborne geophysical data and accurate positioning and timing of detection equipment. Among them, the antenna, Beidou main control unit and data acquisition system are placed outside the aircraft cabin and on the aeromagnetic measurement system, forming an airborne core data processing and transmission unit. The ground differential module is located on the ground and communicates and cooperates with the airborne part through Beidou satellites to jointly complete the entire data transmission and positioning and timing tasks.

[0056] As the front-end interface for the system to communicate with external Beidou satellites, the antenna has a vital signal receiving and sending function. It can keenly receive signals from Beidou satellites, which contain the satellite's location information, time information, and data used for positioning and communication. At the same time, the antenna is also responsible for sending data generated by the airborne system (such as location request information from detection equipment, data collected by the data acquisition system, etc.) to Beidou satellites, thereby realizing data interaction between air and ground. The performance of the antenna directly affects the quality of communication between the entire system and Beidou satellites, and its good signal reception and transmission capabilities are the basis for ensuring the stable operation of the system.

[0057] The Beidou main control unit is the core control and signal processing center of the system. It mainly processes the Beidou satellite signals received by the antenna, and contains multiple key chips and modules, such as the Beidou short message chip, Beidou positioning and timing chip, and the main control module. The Beidou short message chip provides a special communication capability for the main control module. Even in areas with poor communication network coverage, a certain degree of information transmission can be achieved through short messages, which is of great significance for emergency communication and key information transmission in aerogeophysical exploration operations in remote areas or complex flight environments. The Beidou positioning and timing chip focuses on assisting the main control module to achieve high-precision positioning and time synchronization functions. Through accurate analysis and processing of satellite signals, the chip can accurately calculate the geographic location coordinates of the detection equipment and obtain the current accurate time information. The main control module is responsible for coordinating and controlling the operation of the entire Beidou main control unit, integrating and managing data from the positioning and timing chip and other components, ensuring the coordinated work between the various parts of the system, and accurate processing and transmission of data.

[0058] The ground differential module, antenna, and Beidou main control unit work together with Beidou satellites to achieve high-precision positioning and timing of the detection equipment. The ground differential module receives satellite signal data from multiple reference stations and compares and analyzes the signals received by the airborne system. It can calculate the signal deviation caused by factors such as atmospheric propagation delay and satellite orbit error, and generate corresponding correction numbers. These correction numbers are transmitted back to the airborne system via Beidou satellites, and the Beidou main control unit uses these correction numbers to correct the positioning and timing data, thereby greatly improving the positioning accuracy and achieving centimeter-level precise positioning. At the same time, accurate timing is also crucial for the time synchronization of airborne geophysical data acquisition and the coordinated operation of the entire system, and the ground differential module plays a key auxiliary and correction role in it.

[0059] The data acquisition system focuses on the collection of detection data. It is equipped with a variety of professional sensors and acquisition equipment, and can accurately obtain relevant physical field data in the detection area, such as the earth's magnetic field intensity, radioactivity intensity, etc., according to the specific needs of aerial geophysical exploration. After collecting the data, the data acquisition system will preliminarily process and organize the data to ensure the accuracy and completeness of the data. Then, these detection data are sent to the preset communication counterpart, such as the ground monitoring center or data processing server, through the Beidou satellite. During the data transmission process, the data acquisition system will follow specific communication protocols and data formats to ensure that the data can reach the destination accurately and can be effectively identified and processed by the receiving end. At the same time, the data acquisition system may also have some data caching and retransmission functions to cope with possible communication interruptions or signal interference, and ensure the reliability and stability of data transmission.

[0060] Reference Figure 2, the Beidou main control unit includes: Beidou short message chip, Beidou positioning and timing chip, GPRS module and main control module; the Beidou short message chip is used to assist the main control module in providing communication functions; the Beidou positioning and timing chip is used to assist the main control module in achieving high-precision positioning and time synchronization functions. GPRS module; the Beidou-based airborne geophysical data transmission system is based on the communication connection between the GPRS module and the preset communication peer. The Beidou short message chip, Beidou positioning and timing chip, and GPRS module are respectively connected to the main control module; the Beidou main control unit also includes: a storage module and a host computer module; the storage module is used to store positioning and timing data; the host computer module is used to convert the positioning and timing data format into the standard data format required for airborne geophysical exploration, and analyze and process the detection data.

[0061] The Beidou short message chip has a unique communication auxiliary function in the system. It is closely connected to the main control module and exchanges data with the main control module through a specific serial port. When the main control module needs to send short message information, such as sending emergency reports, equipment status information or short data summaries to the ground monitoring center, the Beidou short message chip is responsible for encoding and modulating the information provided by the main control module according to the Beidou short message protocol, and then sending it to the Beidou satellite through the antenna, and then forwarded by the Beidou satellite to the ground receiving station or other receiving equipment. When receiving short messages, the Beidou short message chip receives the satellite signal from the antenna, parses the short message data from it, and passes it to the main control module for processing. This short message communication function is very practical in some special scenarios. For example, when flying in remote areas, when other communication means (such as GPRS network) have poor coverage or are unavailable, the Beidou short message chip can ensure the transmission of key information and guarantee the basic communication needs of aerial geophysical exploration operations.

[0062] The Beidou positioning and timing chip is a key component for achieving high-precision positioning and time synchronization. It receives signals from multiple Beidou satellites, uses positioning algorithms such as signal arrival time difference (TDOA), and combines information such as satellite ephemeris and orbital parameters to accurately calculate the geographical location coordinates of the detection equipment, including longitude, latitude, and altitude. At the same time, the chip can also extract accurate time information from satellite signals, achieve time synchronization with the Beidou satellite system, and provide an accurate time reference for the main control module. The Beidou positioning and timing chip and the main control module transmit data via the SPI high-speed data bus, and the calculated positioning and timing data are transmitted to the main control module in real time. The main control module performs subsequent processing based on these data, such as using positioning information for navigation, using time information for time stamping of data acquisition, and coordinating time synchronization with other systems.

[0063] The GPRS module provides the system with another way to communicate with the preset communication peer. It is connected to the main control module. When the system is within the coverage of the GPRS network, the main control module can choose to send data to the preset communication peer through the GPRS module, such as the server or other data processing platform of the ground monitoring center. The GPRS module supports relatively high-speed data transmission and can transmit a large amount of detection data, equipment status information and other related data. Compared with Beidou short message communication, it has certain advantages in data transmission volume and transmission speed. At the same time, the GPRS module can also receive control instructions, configuration information, etc. from the preset communication peer, and pass it to the main control module to realize two-way communication between the ground and airborne systems. In actual applications, the system can flexibly choose to use Beidou satellite communication or GPRS communication, or a combination of the two, according to the network environment and communication requirements to ensure the reliability and efficiency of data transmission.

[0064] The storage module plays an important role in data storage in the Beidou main control unit. It is connected to the main control module and is used to store positioning and timing data and other related system operation data. The storage module is usually in the form of a memory card to ensure that the data will not be lost after the system is powered off or restarted. The storage module manages the data according to a certain storage structure and format, such as storing data of different times and types in different files or data blocks. When the main control module obtains new positioning and timing data, it will write it to the storage module for storage in a timely manner. The data in the storage module can be read by the main control module at any time for system status monitoring, data analysis, and historical data query functions. For example, during the flight, the ground monitoring center can request to obtain the historical positioning data in the storage module of the airborne system through the communication link in order to review and analyze the flight trajectory and evaluate the execution of the aerogeophysical exploration operation.

[0065] The host computer module plays a key role in conversion and analysis in the entire data processing process. It interacts with the main control module. When the main control module obtains positioning and timing data from the storage module or other data sources, the host computer module will convert the format of these data. It converts the original positioning and timing data format collected by the Beidou main control unit into the standard data format required in the field of airborne geophysical exploration, such as converting the coordinate data in the satellite coordinate system into the longitude and latitude representation in the geographic coordinate system, and adjusting the timestamp format to a format that conforms to the airborne geophysical data recording specification. The converted standard format data is easy to integrate and work with other airborne geophysical equipment or software systems. In addition, the host computer module also has powerful data analysis and processing capabilities. It can perform various analysis operations on the detection data, such as data filtering, outlier detection, geological feature extraction, etc. Through the analysis of a large amount of detection data, the host computer module can help geological experts and scientific researchers better understand the geological structure and mineral distribution of the detection area, provide valuable decision support for airborne geophysical operations, and improve exploration efficiency and accuracy.

[0066] In some embodiments, the detection equipment is an aeromagnetic survey system. As a detection equipment, the combination of an aeromagnetic aircraft and the Beidou system has significant synergistic advantages. The Beidou satellite navigation system provides aircraft with high-precision positioning and timing functions, ensuring that the aircraft can accurately determine its own position during flight, and the error can be controlled within the centimeter range. This is crucial for accurately mapping the detection area and accurately recording the geographical location information of the detection data. At the same time, the precise timing function enables the data acquisition system on the aircraft to collect data under a unified time reference, ensuring the synchronization of data collected by different sensors in time, and facilitating subsequent data fusion and analysis. For example, when collecting magnetic field and radioactive data at the same time, accurate time synchronization can help researchers better analyze the correlation between the changes in the two physical fields, thereby more accurately inferring geological structures and mineral deposit characteristics. In addition, through the Beidou satellite for data transmission, the aeromagnetic aircraft can send the collected data to the ground monitoring center in real time, realizing efficient data interaction between air and ground, and ground personnel can monitor and guide flight operations and data quality in a timely manner to ensure the smooth progress of the detection mission.

[0067] Among them, the preset communication counterpart is the ground monitoring center.

[0068] Exemplary Methods

[0069] The method embodiment of the present application can be applied to the system embodiment of the present application. For details not disclosed in the method embodiment of the present application, please refer to the system embodiment of the present application.

[0070] Reference Figure 3The present application provides a Beidou-based aerogeophysical data transmission method, which is applied to the above-mentioned Beidou-based aerogeophysical data transmission system. The Beidou-based aerogeophysical data transmission method includes:

[0071] Step 310, the antenna receives the signal sent by the Beidou satellite and transmits it to the Beidou positioning and timing chip, and the Beidou positioning and timing chip further transmits the signal to the main control module;

[0072] As the front end of the system's communication with Beidou satellites, the antenna's ability to receive Beidou satellite signals is the starting point of the entire data transmission process. Beidou satellites continuously transmit signals containing a variety of information to the ground, which are transmitted in a specific frequency and coding method. The antenna can effectively capture these signals through its designed frequency band and highly sensitive receiving circuit. Once the signal is received, the antenna converts it into an electrical signal form suitable for transmission within the airborne system, and transmits the signal to the Beidou positioning and timing chip through a coaxial cable or other suitable transmission medium. The Beidou positioning and timing chip is a core component specially designed to process Beidou satellite signals to obtain positioning and timing information. It has powerful signal processing capabilities and specific algorithms, and can perform preliminary filtering, amplification and digital processing on the signals transmitted from the antenna, extract the key data parts related to positioning and timing, and then further transmit these processed signals to the main control module. The establishment of this transmission link ensures the accurate transmission of signals from the satellite to the airborne system, laying the foundation for subsequent data analysis and application.

[0073] Step 320, the main control module analyzes the collected signals to obtain the geographical coordinates of the detection device, the current accurate time, and the number of Beidou satellites that can be searched at the current location;

[0074] After receiving the signal from the Beidou positioning and timing chip, the main control module begins to perform complex parsing work. It uses built-in algorithms and software programs to decode and analyze the encoded data in the signal. First, by parsing the satellite ephemeris data and ranging code in the signal, combined with the known satellite orbit model, the main control module can calculate the distance between the detection equipment and multiple Beidou satellites. Then, using the principle of triangulation, based on the position information of multiple satellites and the calculated distance, the geographical coordinates of the detection equipment are accurately determined, including longitude, latitude and altitude information. At the same time, the signal also contains accurate time information, and the main control module can extract the current accurate time from it. This time information is not only used to record the moment of data collection, but also plays a role in time synchronization in the entire aerogeophysical exploration system, ensuring that each sensor and device works under the same time reference. In addition, the main control module will also count the number of Beidou satellites that can be searched at the current position. The number of satellites directly affects the accuracy and reliability of positioning. By monitoring the number of satellites, the system can evaluate the quality of the current positioning and take corresponding measures when necessary, such as adjusting the antenna direction or waiting for better satellite signal conditions.

[0075] Step 330, the main control module converts the geographical coordinates of the detection device, the current accurate time, and the number of Beidou satellites that can be searched at the current location into a preset standard format required for aerial geophysical exploration for use.

[0076] After obtaining key information such as the geographic location coordinates, time, and number of satellites of the detection equipment, the main control module needs to convert this information into the preset standard format required for airborne geophysical exploration. The field of airborne geophysical exploration usually has specific data format requirements to facilitate data storage, transmission, and subsequent analysis and processing. The main control module will reorganize and encode the data according to these requirements. For example, the geographic location coordinates may need to be converted from the specific format inside the chip to the latitude and longitude representation commonly used in the geographic information system (GIS), and the corresponding geographic reference system information should be added; the time information may need to be adjusted to conform to the international standard time format (such as UTC time) and be accurate to the millisecond or microsecond level to meet the time accuracy requirements of airborne geophysical exploration data; the number of satellites may be converted into a specific encoding format to record and identify the current positioning satellite conditions. The converted standard format data can be easily integrated and interacted with other airborne geophysical exploration equipment, ground monitoring systems, or data analysis software, which improves the versatility and usability of the data. These data can be used to draw flight trajectories, compare and analyze with geological databases, and monitor the progress and quality of airborne geophysical exploration operations in real time, providing important basic data support for the entire airborne geophysical exploration project.

[0077] In some embodiments, the main control module uses the PPP-B2b method to achieve centimeter-level positioning, and uses a ground differential station and real-time dynamic carrier phase differential technology to perform clock correction and positioning correction on the collected signals and generate correction numbers.

[0078] PPP-B2b (Precise Point Positioning-BeiDou B2b) is a high-precision positioning technology in the BeiDou satellite navigation system. It is based on carrier phase observations and uses precision products such as satellite orbits and clock errors to achieve high-precision absolute positioning. In this technology, the main control module obtains carrier phase observation information by receiving the B2b frequency band signal transmitted by BeiDou satellites. By performing complex mathematical processing on the carrier phase observations of multiple satellites, combined with accurate satellite orbits and clock error models, the position of detection equipment (such as airborne geophysical aircraft) can be accurately calculated. Compared with traditional positioning methods, the PPP-B2b method can effectively eliminate the influence of multiple error sources such as atmospheric delay and satellite orbit errors, thereby achieving centimeter-level high-precision positioning. For example, in airborne geophysical exploration, for tasks that require accurate determination of geological structures and mineral deposits, centimeter-level positioning can provide more accurate spatial information, which helps to improve the accuracy and efficiency of exploration. Ground differential stations play a key auxiliary and correction role in the entire positioning process. The ground differential station consists of multiple reference stations distributed in a certain area. These reference stations are equipped with high-precision Beidou receivers and can receive Beidou satellite signals in real time. The signal received by the reference station contains the distance information from the satellite to the reference station and various error factors (such as atmospheric propagation delay, satellite orbit error, etc.). By comparing with the known precise position of the reference station, the ground differential station can calculate the specific values ​​of these errors, that is, generate correction numbers. These correction numbers contain clock correction information and positioning correction information, which are used to compensate for the errors in the satellite signals received by the airborne system. The ground differential station transmits the correction numbers to the airborne main control module in real time through a communication link (such as a data link or network).

[0079] Real-time dynamic carrier phase differential technology (RTK-Carrier Phase Differential) is a method of real-time dynamic positioning using carrier phase observations. In the airborne geophysical data transmission system, after the main control module receives the correction number from the ground differential station, it combines the satellite signal carrier phase observation value collected by itself to perform real-time differential calculations. By comparing the difference in carrier phase observations between the airborne system and the ground reference station and applying the correction number, the main control module can further improve the positioning accuracy and achieve more accurate centimeter-level positioning. At the same time, for clock correction, this technology can keep the clock of the airborne system highly synchronized with the clock of the Beidou satellite system to ensure the accuracy of time information. In airborne geophysical operations, accurate positioning and synchronized time are of vital importance for data acquisition, flight trajectory control, and subsequent data processing and analysis, and can improve the quality and reliability of the entire airborne geophysical project.

[0080] Specifically, the real-time data transmission process includes: placing the Beidou card transmitter and receiver in the airborne measurement system and the ground monitoring center respectively. The transmitter transmits information and transmits the information through the Beidou satellite, the communication module and the Beidou communication card. The short message is received and processed by the information receiving and processing module. If the sender does not receive a response within the waiting time, it is considered that the information transmission has failed. After receiving the information, the receiving and processing module first obtains the frame from the Beidou satellite through the antenna. The data frame is transmitted to the communication module through the serial port and sent to the receiving terminal. The data frame is further verified and deframed according to the protocol format to obtain the encoded data stream, thereby completing the real-time transmission of data.

[0081] In some embodiments, based on the communication connection between the GPRS module and the preset communication peer, the detection data is sent to the preset communication peer via the Beidou satellite.

[0082] In some embodiments, the method further includes: performing self-startup self-test, antenna inspection and collection of related parameters. Specifically, the method includes:

[0083] Perform parameter initialization and initialization;

[0084] The information sent back by the Beidou chip will be analyzed to determine whether the antenna is working normally, whether a short circuit or open circuit occurs, and the inspection results will be displayed in the preset acquisition system interface; the interface display is real-time, thereby preventing the abnormal working state of the antenna from causing a lagging effect on the airborne geophysical data acquisition system;

[0085] When more than two satellites are stably searched, the Beidou positioning and timing chip obtains the current time data;

[0086] When more than three satellites are stably searched, the Beidou positioning and timing chip can obtain the current position data, extract the longitude and latitude information, calculate the current central longitude, and convert the longitude and latitude into kilometer network data;

[0087] Obtain external control instructions, and control the operating status and collection content of the system based on the external control instructions.

[0088] Detailed explanation of system communication and self-test parameter collection process

[0089] Communication connection method and data transmission path

[0090] GPRS module communication: The GPRS (General Packet Radio Service) module provides the system with a communication method based on the mobile communication network. When the system is within the coverage of the GPRS network, it can establish a connection with the preset communication peer (such as the ground monitoring center server). The main control module encapsulates the data to be transmitted according to the GPRS protocol, and then sends it to the mobile communication network through the GPRS module, and then the network routes the data to the preset communication peer. This communication method is suitable for transmitting large amounts of data and has high real-time requirements, such as transmitting detailed detection data, equipment status reports, etc.

[0091] Beidou satellite communication: At the same time, the system uses Beidou satellites for data transmission, especially in some remote areas or when the GPRS network signal is poor, Beidou satellite communication is used as a reliable backup or supplementary method. The detection data collected by the data acquisition system is sent to the Beidou satellite via the antenna through Beidou short messages or other suitable Beidou communication methods, and then forwarded by the Beidou satellite to the preset communication peer. Beidou satellite communication has the advantages of wide coverage and no terrain restrictions, ensuring the possibility of data transmission in various complex environments and ensuring information interaction between aerial geophysical operations and ground monitoring centers.

[0092] System self-check and parameter collection process

[0093] Parameter initialization and startup self-test: When the system starts, the parameters are initialized first. This includes setting the basic operating parameters of the system, such as communication protocol parameters, data acquisition frequency, positioning mode, etc., to ensure that each component of the system operates according to the predetermined configuration. During the startup self-test, the system will test each key component, such as checking whether the Beidou main control unit, data acquisition system, storage module, etc. are working properly, verifying the integrity and correctness of the system software, and testing whether the power supply is stable. Through self-test, the system can promptly detect potential faults or abnormal conditions, providing guarantee for subsequent normal operation.

[0094] Antenna inspection mechanism: Checking the working status of the antenna is an important part of ensuring normal communication of the system. The system analyzes the information sent back by the Beidou chip, which contains relevant data such as the strength and quality of the antenna receiving signal. Through specific algorithms and threshold judgments, it is determined whether the antenna is working properly and whether there is a short circuit or open circuit. For example, if the antenna receives a signal strength far below the normal level or an abnormal resistance value is detected, it may indicate that there is a problem with the antenna. The inspection results will be displayed in real time in the preset acquisition system interface so that the operator can understand the antenna status in a timely manner. Real-time display can avoid the lagging effects such as inaccurate data collection or communication interruption caused by the failure to discover antenna problems in time. Operators can take corresponding measures based on the display results, such as checking the antenna connection, replacing the antenna, etc.

[0095] Satellite signal acquisition and data processing

[0096] Time data acquisition: When the system stably searches for more than two Beidou satellites, the Beidou positioning and timing chip is able to obtain the current time data. The chip parses and processes the time code in the satellite signal to obtain accurate time information and converts it into the time format required by the system, such as the 24-hour month / day / year format, to provide an accurate time reference for the main control module, which is used for time marking of data collection, time synchronization of various system components, and time coordination with other devices.

[0097] Position data acquisition and conversion: When more than three satellites are stably searched, the Beidou positioning and timing chip can use the principle of multi-star positioning to calculate the current position data, including longitude and latitude information. Then, the chip will further process the longitude and latitude information, calculate the current central longitude, and convert the longitude and latitude data into kilometer network data. Kilometer network data is more convenient to use in conjunction with geographic information systems (GIS) in airborne geophysical exploration for operations such as map drawing, regional analysis, and geological feature location, which improves the practicality and visualization of the data and helps geological experts better understand the geographical location relationship and geological structure characteristics of the detection area.

[0098] External command response and system control: The system has the ability to receive external control commands, and receives commands from the preset communication counterpart (such as the ground monitoring center) through the communication module (such as the GPRS module or the Beidou communication module). These commands can include adjusting data acquisition parameters (such as changing the acquisition frequency, sensor sensitivity, etc.), controlling the flight trajectory (such as changing the heading, altitude, etc.), starting or stopping specific data acquisition tasks, etc. After receiving the command, the main control module will control the operating status and acquisition content of the system according to the command content, ensuring that the aerial geophysical exploration operation can be flexibly adjusted according to actual needs and on-site conditions, improving the adaptability and efficiency of the operation, and also ensuring the safe and reliable operation of the system under remote control.

[0099] The workflow of the data acquisition system is as follows: When the module is running, it will perform relevant parameter initialization, open the corresponding serial port and external interrupt, and complete the initialization of the acquisition system software interface; Antenna inspection, in this process, the information sent back by the Beidou chip will be analyzed first, and the antenna working state will be judged whether it is normal, whether there is a short circuit or a break, etc., and the inspection results will be displayed in the acquisition system interface. The interface display is real-time, so as to prevent the abnormal working state of the antenna from causing a lag effect on the aerospace geophysical data acquisition system; After the self-check is normal, the data transmitted by the Beidou chip will be parsed, and the result of the parsed data will be used to judge whether the satellite search is successful and the number of satellites searched. When more than two satellites can be stably searched, the Beidou positioning and timing chip can obtain the current time data and convert the time information format into the Chinese regional time, and the data format is the 24-hour month / day / year; When more than three satellites can be stably searched, the Beidou positioning and timing chip can obtain the current position data, extract the longitude and latitude information, calculate the current central longitude, and convert the longitude and latitude into kilometer network data; In the data acquisition software, the software running status and data acquisition content are controlled by commands.

[0100] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps in the Beidou-based aerial geophysical data transmission system according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0101] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0102] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes the steps in the Beidou-based aerial geophysical data transmission system according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0103] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A Beidou-based aerial geophysical data transmission system, characterized in that: include: Antenna, Beidou main control unit, data acquisition system and ground differential module; Wherein, the antenna, Beidou main control unit and data acquisition system are arranged on the detection equipment; The antenna is used to transmit and receive Beidou satellite signals; The Beidou main control unit processes Beidou satellite signals; The antenna, the Beidou main control unit and the ground differential module realize the positioning and timing of the detection equipment with the help of Beidou satellites; The data acquisition system is used to collect detection data and send the detection data to a preset communication peer via a Beidou satellite.

2. The Beidou-based aerial geophysical data transmission system according to claim 1 is characterized in that: The Beidou main control unit includes: a Beidou short message chip, a Beidou positioning and timing chip and a main control module; The Beidou short message chip is used to assist the main control module in providing communication functions; The Beidou positioning and timing chip is used to assist the main control module in achieving high-precision positioning and time synchronization functions.

3. The Beidou-based aerial geophysical data transmission system according to claim 2 is characterized in that: Also includes: GPRS module; The Beidou-based aerial geophysical data transmission system is based on the GPRS module and the preset communication peer communication connection.

4. The Beidou-based aerial geophysical data transmission system according to claim 2 is characterized in that: The Beidou main control unit also includes: a storage module and a host computer module; The storage module is used to store positioning and timing data; The host computer module is used to convert the positioning and timing data format into the standard data format required for aerial geophysical exploration, and analyze and process the detection data.

5. The Beidou-based aerial geophysical data transmission system according to claim 1 is characterized in that: The detection equipment is an aerial aeromagnetic measurement system.

6. A Beidou-based aerial geophysical data transmission method, characterized in that: Applied to the Beidou-based aerogeophysical data transmission system according to claim 2, 3 or 4, the Beidou-based aerogeophysical data transmission method comprises: The antenna receives the signal sent by the Beidou satellite and transmits it to the Beidou positioning and timing chip, which further transmits the signal to the main control module; The main control module analyzes the collected signals to obtain the geographical coordinates of the detection equipment, the current accurate time, and the number of Beidou satellites that can be searched at the current location; The main control module converts the geographical coordinates of the detection equipment, the current accurate time and the number of Beidou satellites that can be searched at the current location into a preset standard format required for aerial geophysical exploration for use.

7. The Beidou-based aerial geophysical data transmission method according to claim 6, characterized in that: Also includes: The main control module uses the PPP-B2b method to achieve centimeter-level positioning, and uses the ground differential station and real-time dynamic carrier phase differential technology to perform clock correction and positioning correction on the collected signals and generate correction numbers.

8. The Beidou-based aerial geophysical data transmission method according to claim 6, characterized in that: Also includes: Based on the GPRS module and the preset communication peer communication connection: at the same time, the detection data is sent to the preset communication peer via the Beidou satellite.

9. The Beidou-based aerial geophysical data transmission method according to claim 6, characterized in that: Also includes: Perform self-startup self-test, antenna inspection and collection of related parameters.

10. The Beidou-based aerial geophysical data transmission method according to claim 9, characterized in that: The self-startup self-check, antenna check and collection of related parameters include: Perform parameter initialization and initialization; The information sent back by the Beidou chip will be analyzed to determine whether the antenna is working normally, whether a short circuit or open circuit occurs, and the inspection results will be displayed in the preset acquisition system interface; the interface display is real-time, thereby preventing the abnormal working state of the antenna from causing a lagging effect on the airborne geophysical data acquisition system; When more than two satellites are stably searched, the Beidou positioning and timing chip obtains the current time data; When more than three satellites are stably searched, the Beidou positioning and timing chip can obtain the current position data, extract the longitude and latitude information, calculate the current central longitude, and convert the longitude and latitude into kilometer network data; Obtain external control instructions, and control the operating status and collection content of the system based on the external control instructions.

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