CN112198557B - Data correction method, device, terminal equipment and storage medium - Google Patents
Data correction method, device, terminal equipment and storage medium Download PDFInfo
- Publication number
- CN112198557B CN112198557B CN202010975258.9A CN202010975258A CN112198557B CN 112198557 B CN112198557 B CN 112198557B CN 202010975258 A CN202010975258 A CN 202010975258A CN 112198557 B CN112198557 B CN 112198557B
- Authority
- CN
- China
- Prior art keywords
- time
- electromagnetic
- temperature
- preset
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/38—Processing data, e.g. for analysis, for interpretation, for correction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Electric Clocks (AREA)
Abstract
The application is applicable to the technical field of data processing, and provides a data correction method, a device, terminal equipment and a storage medium, wherein the method comprises the following steps: according to the electromagnetic time sequence data and the temperature data acquired by the submarine electromagnetic acquisition station, determining the time period temperature corresponding to each time period of the electromagnetic time sequence data; determining a time error corresponding to the temperature of each time period according to a preset time correction template, wherein the preset time correction template is used for representing the change condition of the time error of a clock on the submarine electromagnetic acquisition station due to the duration of different temperatures; and correcting the electromagnetic time sequence data based on the time error corresponding to the temperature of each time period. Therefore, the clock time of each acquisition station can be corrected, the electromagnetic time sequence data synchronization precision of each acquisition station is ensured, and the application effect of the submarine electromagnetic remote reference synchronization technology is improved.
Description
Technical Field
The present application belongs to the technical field of data processing, and in particular, to a data correction method, apparatus, terminal device, and storage medium.
Background
Subsea electromagnetic surveying is an important part of geophysical surveying. At present, a seabed electromagnetic acquisition station acquires seabed electromagnetic signals, but because the seabed environment is complex and the seabed electromagnetic acquisition station acquires seabed electromagnetic signals containing a large amount of seabed noise, the signal quality of the seabed electromagnetic signals acquired by the seabed electromagnetic acquisition station is poor.
In the related art, in order to improve the signal quality of the subsea electromagnetic signal, a subsea electromagnetic far reference synchronization technology is used to acquire the subsea electromagnetic signal. Specifically, seabed electromagnetic signals are acquired at an exploration measuring point and a reference point through a plurality of acquisition stations respectively, the seabed electromagnetic signals acquired by the reference point are used as reference signals, and auxiliary denoising is carried out on the seabed electromagnetic signals acquired by the exploration measuring point. However, the auxiliary denoising process requires that the data acquired by the exploration measuring points and the data acquired by the reference points are completely synchronized, i.e., the time synchronization of each acquisition station is required. When the GPS time synchronization is adopted during the acquisition of electromagnetic signals on the land, the time synchronization can be frequently performed in a short time, and the time of an acquisition station can be ensured to meet the requirement of remote reference synchronization. However, the submarine magnetotelluric cannot adopt GPS synchronous time setting, only a crystal oscillator clock can be arranged in the acquisition station, an atomic clock is developed as the clock of the acquisition station at present, and because the crystal oscillator clock has error accumulation, the clock accumulation error is very large after the submarine acquires data for a long time, and the magnetotelluric remote reference processing synchronization requirement cannot be met. And the error of the atomic clock is also influenced by the temperature, and the errors of different temperature clocks are different, so that the data synchronization of the submarine magnetotelluric acquisition station is difficult. It can be seen that the current subsea electromagnetic far reference synchronization technology cannot be implemented due to the fact that the time between the acquisition station and the reference station cannot reach the synchronization accuracy.
Disclosure of Invention
The embodiment of the application provides a data correction method, a data correction device, terminal equipment and a storage medium, and can solve the problem of low synchronization precision of the current submarine electromagnetic remote reference synchronization technology.
In a first aspect, an embodiment of the present application provides a data correction method, including:
according to the electromagnetic time sequence data and the temperature data acquired by the submarine electromagnetic acquisition station, determining the time period temperature corresponding to each time period of the electromagnetic time sequence data;
determining a time error corresponding to the temperature of each time period according to a preset time correction template, wherein the preset time correction template is used for representing the change condition of the time error of a clock on the submarine electromagnetic acquisition station according to the duration of different temperatures;
and correcting the electromagnetic time sequence data based on the time error corresponding to the temperature of each time segment.
According to the data correction method provided by the embodiment of the application, the temperature of the electromagnetic time sequence data in the time period corresponding to each time period is determined through the electromagnetic time sequence data and the temperature data acquired by the submarine electromagnetic acquisition station, so that the temperature change of the submarine electromagnetic acquisition station in the data acquisition process can be determined; then, according to a preset time correction template, determining a time error corresponding to the temperature in each time period, so that the adverse effect of the temperature on the clock of the acquisition station can be represented as a specific influence parameter value, and the time sequence correction of the data acquired by the acquisition station can be conveniently carried out on the basis of the influence parameter value; and finally, correcting the time sequence of the electromagnetic time sequence data based on the time error corresponding to the temperature of each time period, so that the clock time of each acquisition station can be corrected, the synchronization of the electromagnetic time sequence data of a plurality of acquisition stations is ensured, and the synchronization precision of the submarine electromagnetic remote reference synchronization technology is improved.
In a second aspect, an embodiment of the present application provides a data correction apparatus, including:
the first determining module is used for determining the time period temperature corresponding to the electromagnetic time sequence data in each time period according to the electromagnetic time sequence data and the temperature change curve acquired by the submarine electromagnetic acquisition station;
the second determining module is used for determining a time error corresponding to the temperature of each time period according to a preset time correction template, and the preset time correction template is used for representing the change situation of the time error of a clock on the submarine electromagnetic acquisition station according to the duration of different temperatures;
and the correction module is used for correcting the electromagnetic time sequence data based on the time error corresponding to each time period temperature.
In a third aspect, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor, when executing the computer program, implements the data correction method according to any one of the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the data correction method according to any one of the first aspect.
In a fifth aspect, an embodiment of the present application provides a computer program product, which, when run on a terminal device, causes the terminal device to execute the data correction method described in any one of the above first aspects.
It is to be understood that, for the beneficial effects of the second aspect to the fifth aspect, reference may be made to the relevant description in the first aspect, and details are not described herein again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart diagram illustrating a data correction method according to an embodiment of the present application;
fig. 2 is a schematic flowchart of step S101 in a data correction method according to an embodiment of the present application;
FIG. 3 is a schematic flow chart diagram illustrating a data correction method according to another embodiment of the present application;
FIG. 4 is a schematic structural diagram of a data correction apparatus according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing a relative importance or importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically stated.
As described in the related art, the auxiliary denoising process requires that the data collected at the survey points and the data collected at the reference points are completely synchronized, i.e., the time synchronization of each collection station is required. When the GPS time synchronization is adopted during the acquisition of electromagnetic signals on the land, the time synchronization can be frequently performed in a short time, and the time of an acquisition station can be ensured to meet the requirement of remote reference synchronization. However, the submarine magnetotelluric cannot adopt GPS synchronous time setting, only a crystal oscillator clock can be arranged in the acquisition station, an atomic clock is developed as the clock of the acquisition station at present, and because the crystal oscillator clock has error accumulation, the clock accumulation error is very large after the submarine acquires data for a long time, and the magnetotelluric remote reference processing synchronization requirement cannot be met. And the error of the atomic clock is also influenced by the temperature, and the errors of different temperature clocks are different, so that the data synchronization of the submarine magnetotelluric acquisition station is difficult. It can be seen that the current subsea electromagnetic far reference synchronization technology cannot be implemented due to the fact that the time between the acquisition station and the reference station cannot reach the synchronization accuracy.
In view of this, the embodiment of the present application provides a data correction method, which determines a time period temperature corresponding to each time period of electromagnetic time sequence data through electromagnetic time sequence data and temperature data acquired by a submarine electromagnetic acquisition station, so as to determine a temperature change of the submarine electromagnetic acquisition station in a data acquisition process; then, according to a preset time correction template, determining a time error corresponding to the temperature in each time period, so that the adverse effect of the temperature on the clock of the acquisition station can be represented as a specific influence parameter value, and the time sequence correction of the data acquired by the acquisition station can be conveniently carried out on the basis of the influence parameter value; and finally, correcting the time sequence of the electromagnetic time sequence data based on the time error corresponding to the temperature of each time period, so that the clock time of each acquisition station can be corrected, the synchronization of the electromagnetic time sequence data of a plurality of acquisition stations is ensured, and the synchronization precision of the submarine electromagnetic remote reference synchronization technology is improved.
Fig. 1 shows a schematic flowchart of a data correction method provided in an embodiment of the present application. The execution main body of the data correction method provided by the application is terminal equipment, and the terminal equipment comprises but is not limited to mobile terminals such as smart phones, notebook computers, tablet computers, supercomputers and personal digital assistants, and can also comprise terminal equipment such as desktop computers and servers. The method for processing the electromagnetic signals on the sea floor as shown in fig. 1 includes steps S101 to S103, which are described in detail below.
S101, according to the electromagnetic time sequence data and the temperature data acquired by the submarine electromagnetic acquisition station, determining the time period temperature corresponding to each time period of the electromagnetic time sequence data.
In this embodiment, the terminal device acquires the electromagnetic time series data and the temperature data in advance. The electromagnetic time sequence data are seabed electromagnetic signals obtained by the seabed electromagnetic acquisition station through actual detection on the seabed, and the seabed electromagnetic detection signals comprise seabed electromagnetic signals and seabed noise signals. The submarine electromagnetic signal is an electromagnetic signal of a submarine earth, and the main signal sources of the submarine electromagnetic signal comprise an ionized layer, a magnetic storm and geomagnetic pulsation; the sea floor noise signal is noise generated by marine environment or human activities, for example, electromagnetic noise generated by cutting earth magnetic field by sea floor ocean current, electromagnetic signal generated by naval vessel activities, and electromagnetic signal generated by electric equipment on naval vessel. The temperature data is environmental temperature data of the environment where the submarine electromagnetic acquisition station is located, the environmental temperature data is temperature time sequence data with the temperature changing along with the time change, and the environmental temperature data comprises environmental temperature data of the submarine electromagnetic acquisition station on a deck, environmental temperature data of the submarine electromagnetic acquisition station in the process of submerging to a submarine target position, environmental temperature data of the submarine electromagnetic acquisition station in the submarine target position, and environmental temperature data of the submarine electromagnetic acquisition station in the process of recovering to the deck.
The submarine electromagnetic acquisition station is equipment for detecting submarine electromagnetic detection signals by submerging the submarine electromagnetic acquisition station, and the structural components of the equipment comprise but are not limited to an electromagnetic data recorder, an electric field sensor, a magnetic field sensor, a beacon, a clock, a releaser, an azimuth and CTD recorder, a thermometer, a floating ball, an anchor system and a frame. In order to improve data stability, the clock is an atomic clock, the electromagnetic data recorder is used for recording electromagnetic time sequence data, and the thermometer is used for recording the temperature of the environment where the submarine electromagnetic acquisition station is located. It can be understood that the terminal equipment can be in communication connection with the submarine electromagnetic acquisition station so as to acquire electromagnetic time sequence data and temperature data acquired by the submarine electromagnetic acquisition station in real time; the terminal equipment can also be in communication connection with the server, the server is in communication connection with the seabed electromagnetic acquisition station so as to upload the seabed electromagnetic time sequence data and the temperature data acquired by the seabed electromagnetic acquisition station to the server, and the terminal equipment downloads the electromagnetic time sequence data and the temperature data from the server.
The temperature of the time period is a numerical value representing a constant temperature of the electromagnetic time series data in the time period, and it is understood that the temperature is regarded as the constant temperature within a preset error range, for example, the temperature T ± 0.1 ℃. It should be noted that the residence time of the electromagnetic acquisition station on the seabed during the deck, the submergence process, the seabed and the recovery process is long, and the temperature of the environment in which the electromagnetic acquisition station stays is constant and is also bound to be changed.
And the terminal equipment determines the time period temperature corresponding to each time period of the electromagnetic time sequence data according to the electromagnetic time sequence data and the temperature data. Illustratively, since the electromagnetic time-series data and the temperature data are both time-series data, the electromagnetic time-series data and the temperature data are time-aligned to obtain a corresponding relationship of the electromagnetic time-series data and the temperature data in time, and the electromagnetic time-series data corresponding to a time period is determined based on the time period with constant temperature, so as to obtain a time period temperature of the electromagnetic time-series data in the time period.
And S102, determining a time error corresponding to the temperature of each time period according to a preset time correction template, wherein the preset time correction template is used for representing the change condition of the time error of a clock on the submarine electromagnetic acquisition station according to the duration of different temperatures.
In this embodiment, the time error is an offset of a time offset of a clock of the subsea electromagnetic acquisition station occurring at different temperatures for different durations. The terminal device stores a pre-constructed preset time correction template in advance. The preset time correction template is used for representing the corresponding relation among the temperature, the temperature duration and the time error, and particularly represents the condition that the time error of a clock on the submarine electromagnetic acquisition station changes along with the duration of different temperatures. It can be understood that the clock of the subsea electromagnetic acquisition station is shifted in time at different temperatures to different extents, and as time increases, the time error caused by the time shift also increases.
Illustratively, when the clock of the subsea electromagnetic acquisition station is at 5 ℃ and the offset of the time offset occurring every 1 hour is 0.1 microsecond, when the subsea electromagnetic acquisition station is placed at 5 ℃ for 2 days, the time offset of the clock of the subsea electromagnetic acquisition station is 4.8 microseconds, so that the time error variation curve of 2 hours at 5 ℃ is represented by the preset time correction template. In the practical application process, based on the preset time correction template, a time error change curve with the time period temperature of 5 ℃ is inquired, and according to the time length of the time period, a time error corresponding to the time length in the time error change curve is inquired.
Furthermore, the submarine electromagnetic acquisition station is located in an environment comprising a deck environment, an environment in the submergence and recovery process and a submarine environment, the submarine electromagnetic acquisition station is placed in each environment for different time ranges, and the submarine electromagnetic acquisition station is placed in each environment for different temperature ranges, so that the preset time correction templates in the three environments are respectively constructed. Still further, before determining a time error corresponding to each time interval temperature according to the preset time correction template, the method further includes: determining an acquisition procedure corresponding to the electromagnetic time sequence data; and acquiring a preset time correction template corresponding to the acquisition process. The collection process is a process corresponding to the seabed electromagnetic collection station in different environments, for example, a preparation process corresponding to a deck environment, a submergence process environment corresponding to a submergence process, a recovery process corresponding to a recovery process environment and a detection process corresponding to a seabed environment. And performing time sequence correction on the electromagnetic time sequence data obtained in the corresponding acquisition process according to the preset time correction template corresponding to each acquisition process, thereby further improving the stability of the data result.
And S103, correcting the electromagnetic time series data based on the time error corresponding to each time period temperature.
In this embodiment, the terminal device performs timing correction on the electromagnetic timing data based on the time error corresponding to each time zone temperature. Specifically, the terminal device corrects the time length of the time period corresponding to the time period temperature based on the time error corresponding to each time period temperature, adds the corrected time lengths of all the time periods to obtain a total time length, and uses the total time length as the time sequence of the electromagnetic time sequence data. Based on the method, the sequence correction is carried out on the submarine electromagnetic acquisition stations of the acquisition point and the reference point. It can be understood that the throwing time of the submarine electromagnetic acquisition stations of the acquisition point and the reference point is the same, that is, the starting time of the submarine electromagnetic acquisition stations for acquiring electromagnetic time sequence data and temperature data is the same, so that after subsequent time correction, the clock time of the acquisition stations of the acquisition point and the reference point is synchronous, the electromagnetic time sequence data of a plurality of acquisition stations are ensured to be synchronous, and the stability of the submarine electromagnetic remote reference synchronization technology is improved.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating step S101 in a data correction method according to an embodiment of the present application. Compared with the embodiment of fig. 1, step S101 in the processing method of the seafloor electromagnetic signal provided by the present embodiment specifically includes steps S201 to S202. The details are as follows:
s201, according to the electromagnetic time sequence data and the temperature data, determining a time period of the electromagnetic time sequence data when the temperature is constant.
In the present embodiment, the constant temperature means that the constant temperature is 5 ℃ when the temperature is within a predetermined error range, for example, 5 ± 0.5 ℃. It will be appreciated that the time duration of the time period for each constant temperature is different, that is, the time duration of the time period for each time period temperature is different. It should be noted that, because the electromagnetic time sequence data and the temperature data are both acquired by the subsea electromagnetic acquisition station, the electromagnetic time sequence data and the temperature data are both acquired in the same temperature environment, that is, the time sequences of the electromagnetic time sequence data and the temperature data are the same. In one embodiment, however, the start times of the electromagnetic timing data and the temperature data may be aligned in order to ensure that the timing of the electromagnetic timing data and the temperature data is identical.
The terminal equipment carries out time alignment on the starting time of the electromagnetic time sequence data and the starting time of the temperature data, and determines the time period of the electromagnetic time sequence data when the temperature is constant based on the electromagnetic time sequence data and the temperature data after the time alignment. The time point when the seabed electromagnetic acquisition station is thrown into the sea is used as a starting point, namely the starting time of the electromagnetic time sequence data and the starting time of the temperature data. It will be appreciated that the electromagnetic acquisition stations on the seafloor are recorded at the start time of entry into each environment. For example, recording a point in time when a subsea electromagnetic acquisition station is thrown; when the submarine electromagnetic acquisition station reaches the submarine target position, recording a time point; when the seabed electromagnetic acquisition station starts to ascend and recover, a time point is recorded; a point in time is also recorded when the subsea electromagnetic acquisition station leaves the water. It should be noted that because the electromagnetic acquisition stations are submerged, on the sea bottom and during the recovery process for a long time (e.g. half a year on the sea bottom), the error at each time point is negligible.
And S202, taking the temperature when the temperature is constant as the time period temperature corresponding to the time period of the electromagnetic time sequence data.
In this embodiment, the terminal device uses the temperature at the time of temperature constant as the time period temperature corresponding to the time period of the electromagnetic time series data.
On the basis of the embodiment shown in fig. 1, determining the time error corresponding to each time period temperature according to the preset time correction template includes: determining a time error change curve corresponding to the time period temperature in a preset time correction template; and determining the time error corresponding to each time length in the time error change curve according to the time length of the time section in which the temperature of each time section is positioned, and obtaining the time errors corresponding to the temperatures of the multiple time sections.
In this embodiment, since the clock has different time offsets at different temperatures, it is necessary to set corresponding time error variation curves at different temperatures, which are used to represent the time error of the clock as the duration of the temperature increases. And the terminal equipment determines the time error corresponding to each time length in the time error change curve according to the time length of the time section where the temperature of each time section is located, and obtains the time errors corresponding to the temperatures of a plurality of time sections. It can be understood that, for different acquisition procedures, a preset time correction template corresponding to the acquisition procedure may be called to determine a time error variation curve corresponding to the time period temperature, and a time error corresponding to the time period temperature is obtained based on the time error variation curve.
Referring to fig. 3, fig. 3 is a schematic flow chart of a data correction method according to another embodiment of the present application. Compared with the embodiment of fig. 1, the method for processing the electromagnetic signal on the seafloor provided by the present embodiment further includes steps S301 to S302 before step S102. The details are as follows:
s301, simulating the placement of the submarine electromagnetic acquisition station in a temperature environment with a plurality of preset temperatures for preset time, and acquiring time errors of the submarine electromagnetic acquisition station after the placement of the submarine electromagnetic acquisition station at each preset temperature for the preset time.
In this embodiment, the temperature environment may be a thermostatic chamber environment. The terminal equipment simulates a submarine electromagnetic acquisition station to be placed in a temperature environment with a plurality of preset temperatures for preset time, specifically, the terminal equipment controls a temperature regulator of a thermostatic chamber where the submarine electromagnetic acquisition station is located to regulate the temperature of the thermostatic chamber to the preset temperature, when the temperature of the thermostatic chamber reaches the preset temperature, an initial time point of a clock on the submarine electromagnetic acquisition station is recorded, and after the preset time, an ending time point of the clock is recorded. In a theoretical case, a time difference between the initial time point and the ending time point should be equal to a preset time length, and since the clock generates time offset due to temperature, in an actual case, the time difference between the initial time point and the ending time point should not be equal to the preset time length, so that a difference value between the time difference between the initial time point and the ending time point and the preset time length is taken as a time error.
In a possible implementation manner, simulating that the subsea electromagnetic acquisition station places a preset time duration in a temperature environment with a plurality of preset temperatures, and acquiring a time error after the subsea electromagnetic acquisition station places the preset time duration at each preset temperature respectively includes: simulating a temperature environment in which the seabed electromagnetic acquisition station is placed at each preset temperature, and acquiring current first GPS time and a first time point corresponding to a clock of the seabed electromagnetic acquisition station when the seabed electromagnetic acquisition station is at the preset temperature; after the preset time length, acquiring the current second GPS time and a second time point corresponding to the clock of the seabed electromagnetic acquisition station again; and calculating to obtain a time error of the seabed electromagnetic acquisition station after the seabed electromagnetic acquisition station is placed at each preset temperature for a preset time according to the first GPS time, the second GPS time, the first time point and the second time point corresponding to each preset temperature.
In this embodiment, all the submarine electromagnetic acquisition stations are subjected to assisted GPS timing to obtain first GPS time, and the terminal device adjusts the temperature of the thermostatic chamber to a preset temperature; at GPS time T 0GPS The auxiliary GPS is switched off, the clock of the acquisition station starts to time, wherein the starting time of the clock is T 0CLOCK Then T is 0GPS ＝T 0CLOCK . At a preset time length T G Then, reading the time point T of the clock of the acquisition station GCLOCK Simultaneously connecting an auxiliary GPS for time synchronization to obtain GPS time T GGPS . Therefore, the time length of the clock and the GPS time length can be calculated as: delta T CLOCK ＝T GCLOCK -T 0CLOCK ，ΔT GPS ＝T GGPS -T 0GPS (ii) a The starting times being the same, i.e. T 0GPS ＝T 0CLOCK So that T G The time error of the acquisition station clock after the time is: ER T (N,M)＝ΔT GPS -ΔT CLOCK Where ERT is the time error, N is the time, and M is the temperature point.
Optionally, a pre-set time error template for deck-launch-seafloor-recovery etc. processes is constructed. In practical cases, the time of standing on the deck for the acquisition is approximately 48 hours, the temperature is from 5 to 45 ℃; the time for launching and recovering is not more than 1 hour, and the temperature is 3-45 ℃; the maximum seabed collection time can reach 30 days, and the temperature is 3-4 ℃; therefore, three working procedures of clock drift testing, namely deck, launch/recovery and seafloor collection procedures, are required.
Optionally, when the temperature clock drift test is performed indoors, the GPS cannot be directly used indoors, and an auxiliary GPS is required to be used for timing, and the first GPS time and the second GPS time are acquired through an auxiliary global positioning system a-GPS, that is, timing is performed in a manner of "base station + remote ephemeris data + GPRS transmission + GPS".
S302, constructing a preset time correction template according to a plurality of preset temperatures, preset durations and time errors.
In this embodiment, the terminal device draws a preset time correction template of the clock of the acquisition station according to a plurality of preset temperatures, preset durations and time errors. Optionally, in timeThe error curve of the clock over time is plotted on the horizontal axis: ER (ethylene-propylene copolymer) T (N time )＝ΔT GPS -ΔT CLOCK (ii) a And (3) drawing an error curve of the clock along with the temperature change by taking the temperature as a horizontal axis: ER T (M temp )＝ΔT GPS -ΔT CLOCK (ii) a And (3) drawing a clock error distribution diagram of each acquisition station by taking the temperature as a horizontal axis and the time as a vertical axis: ER T (N time ，M temp )＝ΔT GPS -ΔT CLOCK 。
It will be appreciated that due to differences in the clocks of each undersea electromagnetic acquisition station, a preset time correction template is constructed for each acquisition station that is appropriate for that acquisition station. Preferably, the acquisition stations needing to construct the preset time correction template are all placed in the same thermostatic chamber for time drift testing.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Fig. 4 shows a block diagram of a data correction device provided in an embodiment of the present application, corresponding to the data correction method described in the above embodiment, and only the relevant parts of the embodiment of the present application are shown for convenience of description.
Referring to fig. 4, the apparatus includes:
the first determining module 401 is configured to determine a time period temperature corresponding to each time period of the electromagnetic time sequence data according to the electromagnetic time sequence data and the temperature change curve acquired by the submarine electromagnetic acquisition station;
a second determining module 402, configured to determine a time error corresponding to the temperature in each time period according to a preset time correction template, where the preset time correction template is used to represent a change condition of the time error of the clock in the seafloor electromagnetic acquisition station according to durations of different temperatures;
and a correcting module 403, configured to correct the electromagnetic time series data based on the time error corresponding to the temperature in each time period.
According to the data correction device provided by the embodiment of the application, the temperature of the electromagnetic time sequence data in the time period corresponding to each time period is determined through the electromagnetic time sequence data and the temperature data acquired by the submarine electromagnetic acquisition station of the first determination module 401, so that the temperature change of the submarine electromagnetic acquisition station in the data acquisition process can be determined; then, the second determining module 402 determines a time error corresponding to the temperature in each time period according to a preset time correction template, so that the adverse effect of the temperature on the clock of the acquisition station can be characterized as a specific influence parameter value, and the time sequence correction of the data acquired by the acquisition station based on the influence parameter value can be conveniently performed; finally, the correction module 403 corrects the time sequence of the electromagnetic time sequence data based on the time error corresponding to the temperature of each time segment, so that the clock time of each acquisition station can be corrected, the synchronization of the electromagnetic time sequence data of a plurality of acquisition stations is ensured, and the synchronization precision of the submarine electromagnetic far reference synchronization technology is improved.
As an embodiment of the present application, the first determining module 401 is further configured to:
time-aligning a start time of the electromagnetic time sequence data with a start time of the temperature data;
determining the time period of the electromagnetic time sequence data when the temperature is constant according to the electromagnetic time sequence data and the temperature data after time alignment;
and taking the temperature when the temperature is constant as the time period temperature corresponding to the time period of the electromagnetic time sequence data.
As an embodiment of the present application, the second determining module 402 is further configured to:
determining a time error change curve corresponding to the time period temperature in a preset time correction template;
and determining the time error corresponding to each time length in the time error change curve according to the time length of the time section in which the temperature of each time section is positioned, and obtaining the time errors corresponding to the temperatures of the multiple time sections.
As an embodiment of the present application, the data correction apparatus further includes:
the third determining module is used for determining an acquisition process corresponding to the electromagnetic time sequence data;
and the acquisition module is used for acquiring the preset time correction template corresponding to the acquisition procedure.
As an embodiment of the present application, the data correction apparatus further includes:
the simulation module is used for simulating the placing preset time of the submarine electromagnetic acquisition station in the temperature environments with a plurality of preset temperatures and acquiring the time error of the submarine electromagnetic acquisition station after the placing of the preset time at each preset temperature;
and the construction module is used for constructing a preset time correction template according to the plurality of preset temperatures, the preset duration and the time errors.
As an embodiment of the present application, the simulation module is further used for
Simulating a temperature environment of the seabed electromagnetic acquisition station placed at each preset temperature, and acquiring current first GPS time and a first time point corresponding to a clock of the seabed electromagnetic acquisition station when the seabed electromagnetic acquisition station is at the preset temperature;
after the preset time length, acquiring the current second GPS time and a second time point corresponding to the clock of the seabed electromagnetic acquisition station again;
and calculating to obtain a time error of the seabed electromagnetic acquisition station after the seabed electromagnetic acquisition station is placed at each preset temperature for a preset time according to the first GPS time, the second GPS time, the first time point and the second time point corresponding to each preset temperature.
As an embodiment of the present application, the first GPS time and the second GPS time are acquired by an assisted global positioning system A-GPS.
It should be noted that, for the information interaction, execution process, and other contents between the above devices/units, the specific functions and technical effects thereof based on the same concept as those of the method embodiment of the present application can be specifically referred to the method embodiment portion, and are not described herein again.
It should be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is only used for illustration, and in practical applications, the above function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the apparatus may be divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 5, the terminal device 5 of this embodiment includes: at least one processor 50 (only one shown in fig. 5), a memory 51, and a computer program 52 stored in the memory 51 and executable on the at least one processor 50, the processor 50 implementing the steps of any of the above-described method embodiments when executing the computer program 52.
The terminal device 5 may be a mobile phone, a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 50, a memory 51. Those skilled in the art will appreciate that fig. 5 is only an example of the terminal device 5, and does not constitute a limitation to the terminal device 5, and may include more or less components than those shown, or combine some components, or different components, such as an input-output device, a network access device, and the like.
The Processor 50 may be a Central Processing Unit (CPU), and the Processor 50 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may in some embodiments be an internal storage unit of the terminal device 5, such as a hard disk or a memory of the terminal device 5. The memory 51 may also be an external storage device of the terminal device 5 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the terminal device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the terminal device 5. The memory 51 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer program. The memory 51 may also be used to temporarily store data that has been output or is to be output.
The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the above-mentioned method embodiments.
The embodiments of the present application provide a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above method embodiments when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal apparatus, a recording medium, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other ways. For example, the above-described apparatus/network device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (8)
1. A method of correcting data, comprising:
when the seabed electromagnetic acquisition station is at a preset temperature, acquiring current first GPS time and a first time point corresponding to a clock of the seabed electromagnetic acquisition station;
after the preset time length, acquiring the current second GPS time and a second time point corresponding to the clock of the submarine electromagnetic acquisition station again;
calculating to obtain a time error of the seabed electromagnetic acquisition station after the preset time is placed at each preset temperature according to the first GPS time, the second GPS time, the first time point and the second time point corresponding to each preset temperature;
constructing a preset time correction template according to the plurality of preset temperatures, the preset time and the time errors;
according to the electromagnetic time sequence data and the temperature data acquired by the submarine electromagnetic acquisition station, determining the time period temperature corresponding to each time period of the electromagnetic time sequence data;
determining a time error corresponding to each time period temperature according to the preset time correction template, wherein the preset time correction template is used for representing the change condition of the time error of the clock on the seabed electromagnetic acquisition station according to the duration of different temperatures;
and correcting the electromagnetic time sequence data based on the time error corresponding to each time period temperature.
2. The data correction method of claim 1, wherein the determining the time period temperature corresponding to the electromagnetic time sequence data in each time period according to the electromagnetic time sequence data and the temperature data collected by the submarine electromagnetic collection station comprises:
according to the electromagnetic time sequence data and the temperature data, determining a time period of the electromagnetic time sequence data when the temperature is constant;
and taking the temperature when the temperature is constant as the time period temperature corresponding to the time period of the electromagnetic time sequence data.
3. The data correction method of claim 1, wherein the determining a time error corresponding to each of the time segment temperatures according to a preset time correction template comprises:
determining a time error change curve corresponding to the time period temperature in the preset time correction template;
and determining the time error corresponding to each time length in the time error change curve according to the time length of the time section where each time section temperature is located, so as to obtain the time errors corresponding to a plurality of time section temperatures.
4. The data correction method of any one of claims 1 to 3, wherein before determining the time error corresponding to each of the time segment temperatures according to the preset time correction template, the method further comprises:
determining an acquisition process corresponding to the electromagnetic time sequence data;
and acquiring the preset time correction template corresponding to the acquisition process.
5. The data correction method of claim 1, wherein the first GPS time and the second GPS time are acquired by an assisted global positioning system a-GPS.
6. A data correction apparatus, characterized by comprising:
the simulation module is specifically configured to:
when the seabed electromagnetic acquisition station is at a preset temperature, acquiring current first GPS time and a first time point corresponding to a clock of the seabed electromagnetic acquisition station;
after the preset time length, acquiring the current second GPS time and a second time point corresponding to the clock of the submarine electromagnetic acquisition station again;
calculating to obtain a time error of the seabed electromagnetic acquisition station after the seabed electromagnetic acquisition station is placed at each preset temperature for the preset time according to the first GPS time, the second GPS time, the first time point and the second time point corresponding to each preset temperature;
the construction module is used for constructing a preset time correction template according to the plurality of preset temperatures, the preset duration and the time errors;
the first determining module is used for determining the time period temperature corresponding to each time period of the electromagnetic time sequence data according to the electromagnetic time sequence data and the temperature change curve acquired by the submarine electromagnetic acquisition station;
the second determining module is used for determining a time error corresponding to each time period temperature according to the preset time correcting template, and the preset time correcting template is used for representing the change situation of the time error of the clock on the seabed electromagnetic acquisition station according to the duration of different temperatures;
and the correction module is used for correcting the electromagnetic time sequence data based on the time error corresponding to each time period temperature.
7. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 5 when executing the computer program.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975258.9A CN112198557B (en) | 2020-09-16 | 2020-09-16 | Data correction method, device, terminal equipment and storage medium |
| PCT/CN2021/096088 WO2022057304A1 (en) | 2020-09-16 | 2021-05-26 | Data correction method and apparatus, terminal device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975258.9A CN112198557B (en) | 2020-09-16 | 2020-09-16 | Data correction method, device, terminal equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112198557A CN112198557A (en) | 2021-01-08 |
| CN112198557B true CN112198557B (en) | 2022-10-11 |
Family
ID=74015186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010975258.9A Active CN112198557B (en) | 2020-09-16 | 2020-09-16 | Data correction method, device, terminal equipment and storage medium |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112198557B (en) |
| WO (1) | WO2022057304A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112198557B (en) * | 2020-09-16 | 2022-10-11 | 南方科技大学 | Data correction method, device, terminal equipment and storage medium |
| CN113391040B (en) * | 2021-07-12 | 2023-09-15 | 北京清环宜境技术有限公司 | Automatic calibration method for data artificial intelligence of atmospheric micro station |
| CN113922908B (en) * | 2021-09-30 | 2023-11-14 | 西安诺瓦星云科技股份有限公司 | GPS timing precision improvement and synchronous playing method, storage medium and equipment thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702033B (en) * | 2009-10-23 | 2011-11-09 | 重庆大学 | Method for generating global positioning system (GPS) synchronous control signal detected by electromagnetic method detection |
| US20110141850A1 (en) * | 2009-12-15 | 2011-06-16 | Pgs Onshore, Inc. | Electromagnetic system for timing synchronization and location determination for seismic sensing systems having autonomous (NODAL) recording units |
| CN103091717B (en) * | 2013-01-09 | 2015-10-21 | 中国科学院电工研究所 | A kind of electromagnetic exploration method receiving and dispatching automatic synchronization frequency conversion |
| CN104459802B (en) * | 2014-12-01 | 2017-01-11 | 中国地质大学（北京） | Emission device for electrical prospecting system |
| CN106909065B (en) * | 2017-04-19 | 2019-07-19 | 中国科学院地质与地球物理研究所 | A kind of real-time clock clock deviation bearing calibration of prospecting instrument |
| CN107526111B (en) * | 2017-08-15 | 2019-03-19 | 中国科学院电子学研究所 | The method with removal is extracted for the sky noise of half airborne electromagnetic system |
| CN108037656A (en) * | 2017-11-13 | 2018-05-15 | 深圳还是威健康科技有限公司 | Real-time timepiece chip calibration method, device and terminal device |
| CN110058319B (en) * | 2019-01-16 | 2020-11-27 | 南方科技大学 | Magnetotelluric data acquisition method and device and terminal equipment |
| CN110212863B (en) * | 2019-05-31 | 2024-02-13 | Oppo广东移动通信有限公司 | Method, apparatus, electronic device and storage medium for calibrating crystal oscillator |
| CN110596763B (en) * | 2019-08-23 | 2021-04-23 | 南方科技大学 | Three-dimensional acquisition method and device for magnetotelluric data and terminal equipment |
| CN112198557B (en) * | 2020-09-16 | 2022-10-11 | 南方科技大学 | Data correction method, device, terminal equipment and storage medium |
-
2020
- 2020-09-16 CN CN202010975258.9A patent/CN112198557B/en active Active
-
2021
- 2021-05-26 WO PCT/CN2021/096088 patent/WO2022057304A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN112198557A (en) | 2021-01-08 |
| WO2022057304A1 (en) | 2022-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112198557B (en) | Data correction method, device, terminal equipment and storage medium | |
| JP5663621B2 (en) | Navigation bit boundary determination device and method therefor | |
| CN105849589B (en) | Global Navigation Satellite System, positioning terminal, localization method and recording medium | |
| Kebkal et al. | Underwater acoustic modems with integrated atomic clocks for one-way travel-time underwater vehicle positioning | |
| CN107272038B (en) | High-precision positioning method and device | |
| CN104197939A (en) | Multi-reference-point under-water vehicle combination navigation method based on underwater information network | |
| CN109313271A (en) | One kind is for making digital signal and the relevant method, apparatus of associated code, computer program, chipset or data structure | |
| CN103364799A (en) | Apparatus and method for determining navigation bit boundary, receiving machine, mobile equipment and method for satellite navigation and positioning | |
| CN111948686A (en) | Time synchronization method and device | |
| US20120010811A1 (en) | Route information generation device and route information generation method | |
| CN111103566B (en) | Course angle determining method, course angle determining system, electronic equipment and storage medium | |
| Waserman et al. | A mixed-integer least-squares formulation of the GNSS snapshot positioning problem | |
| CN110568458B (en) | Ionosphere VTEC closed-loop test system and method based on GNSS | |
| Iizuka et al. | Improving the 3D model accuracy with a post-processing kinematic (PPK) method for UAS surveys | |
| CN103685944A (en) | Positioning photography method for photography equipment | |
| CN113552619A (en) | Deep seismic phase automatic matching-based deep fine positioning technology for remote seismic origin | |
| CN117055323A (en) | Star-based precise time service method and system based on Beidou/Galileo system fusion | |
| JP2010164346A (en) | Method and system for correcting measurement time of data logger | |
| RU2619443C2 (en) | Method of error estimating of three-axis gyroscope | |
| SG175818A1 (en) | Relative time measurement system with nanosecond level accuracy | |
| TWI451115B (en) | Satellite positioning method, satellite pesudorange calculation apparatus and satellite pesudorange calculation method | |
| CN112639630A (en) | Method and system for estimating clock drift for dating seismic data samples | |
| CN108303753A (en) | Ground magnetic vector field observes data consistency bearing calibration | |
| CN115314142B (en) | Time calibration method, device, electronic equipment and storage medium | |
| CN103954979A (en) | System and method for detecting noise inside GNSS receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |