Optical fiber data acquisition method

Abstract

The invention relates to the technical field of seismic detection data acquisition, and provides an optical fiber data acquisition method. The method comprises the steps that a seismic recorder sends a seismic source preparation signal to a controllable seismic source vehicle and receives a prepared response signal returned by the controllable seismic source vehicle; and the seismic recorder responds to the prepared response signal and sends an acquisition control signal to the optical fiber demodulator. Software and hardware of the integrated optical fiber seismic data acquisition system and the seismic source excitation system are matched through the signal matching machine, and a seismic source scanning signal and a TB signal are transmitted to the seismic recorder. A seismic source scanning signal encoded by the seismic source encoder is transmitted to the vibroseis in a wireless communication mode and excites seismic waves. And carrying out related processing on the seismic signal and the seismic source scanning signal to generate an original shot gather record, and carrying out quality control on seismic data. Through the optical fiber data synchronous acquisition method, the problem of low optical fiber seismic data acquisition efficiency caused by mismatching of an optical fiber seismic data acquisition system and a seismic source excitation system is solved.

Description

Technical Field

[0001] The present application relates to the technical field of seismic detection data acquisition, and in particular to a fiber optic data acquisition method. Background Art

[0002] Because fiber-optic seismic data acquisition systems are incompatible with existing source excitation systems, current joint testing of fiber-optic seismic data acquisition systems and vibrators typically utilizes a continuous recording seismic data acquisition method. Synchronous fiber-optic seismic data acquisition is based on the TB time corresponding to the GPS timing clock of the vibrator encoder. When storing seismic data, the time corresponding to the GPS timing clock of the fiber-optic demodulator is entered into the seismic data file name. Later, the sampling point corresponding to the TB is searched for, and the raw data is intercepted to synchronize source excitation and data storage. However, this continuous data acquisition method is not conducive to real-time quality control of fiber-optic seismic data acquisition, requiring offline processing to screen the collected fiber-optic seismic data, which reduces the efficiency of fiber-optic seismic data acquisition. Summary of the Invention

[0003] In view of this, embodiments of the present application provide a fiber optic data acquisition method, device, electronic device, and computer-readable storage medium to solve the problem of low efficiency in fiber optic seismic data acquisition in the prior art.

[0004] The first aspect of the embodiment of the present application includes: matching the fiber optic seismic data acquisition system and the source excitation system through a signal matching machine to achieve efficient acquisition of fiber optic seismic data, the fiber optic seismic data acquisition system includes a fiber optic detector array, a seismic recorder, a fiber optic demodulator and a signal matching machine, and the source excitation system includes a source setting host computer, a source encoder, a source decoder and a controllable source vehicle; detecting environmental noise through the seismic recorder, and when the environmental noise meets the preset noise requirement, the seismic recorder sends a source preparation signal to the controllable source vehicle, and receives and responds to the source preparation response signal returned by the controllable source vehicle; sending an acquisition control signal to the networked fiber optic demodulator through the seismic recorder to set the acquisition parameters and working status of the fiber optic demodulator node, controlling the fiber optic demodulator to demodulate the seismic waves sensitive to the detector array to obtain a demodulated seismic signal, and the seismic signal is sent to the seismic recorder according to the network transmission protocol, and the seismic signal includes a first Time stamp information, the first time stamp information is obtained based on the first timer in the optical fiber demodulator; the source scanning signal is obtained through the source encoder, and the source scanning signal is sent to the seismic recorder through the signal matching machine, and at the same time, the source encoder sends a second time stamp signal which is transmitted to the seismic recorder through the signal matching machine, and the controllable source vehicle responds to the source scanning signal to generate seismic waves, and the second time stamp signal is obtained based on the second timer; in the seismic recorder, the seismic signal is intercepted in real time according to the source excitation time, and the intercepted seismic signal is correlated with the source scanning signal to obtain an original shot collection record, and the source excitation time is the time when the time stamp signal is issued; if the original shot collection record does not meet the preset data requirements, the original shot collection record is filtered, and if the filtered original shot collection record still does not meet the preset data requirements, the seismic wave is re-issued at the current shot point, and a new shot collection record is collected until a shot collection record that meets the preset data requirements is obtained.

[0005] The second aspect provided by the embodiment of the present application includes: matching the fiber optic seismic data acquisition system and the source excitation system through a signal matching machine to achieve efficient acquisition of fiber optic seismic data, the fiber optic seismic data acquisition system includes a fiber optic detector array, a seismic recorder, a fiber optic demodulator and a signal matching machine, and the source excitation system includes a source setting host computer, a source encoder, a source decoder and a controllable source vehicle; sending an acquisition control signal to the fiber optic demodulator through the seismic recorder, the acquisition control signal includes an intelligent power-saving control instruction, and the intelligent power-saving control instruction is used to control the power consumption of active devices and circuits in the fiber optic demodulator that are in standby or off state; the fiber optic demodulator includes a first timer, a temperature detection circuit and a power status monitoring circuit, and the first timer in the fiber optic demodulator is used to add a first time mark signal to the seismic signal, the first time mark signal is used to calibrate the acquisition time of the fiber optic seismic data, the temperature detection circuit is used to collect current ambient temperature data, and the power status monitoring circuit is used to monitor the power status of the power supply. The data is transmitted to the seismic recorder for intelligent power-saving control. Based on the discharge curve of the power supply, the current voltage of the power supply is compared with the discharge curve to obtain the remaining power of the power supply; a temperature fitting prediction curve is generated according to the current temperature measurement curve and historical ambient temperature data of the power consumption module in the optical fiber demodulator; data on the power attenuation rate of the power consumption module is collected to obtain the current power consumption rate curve, and node trend analysis is performed based on the current power consumption rate curve, the temperature fitting prediction curve, the historical data on the discharge rate of the power supply and the start-up time of the active device to obtain analysis results. The power consumption module includes active devices and circuits; in response to the intelligent power-saving control instruction, combined with the current power usage status and the time difference between different active devices or circuits that can be turned off or on standby and need to be woken up in advance, the Lagrange multiplier method is used according to the convex optimization theory to obtain an intelligent power-saving control method, and intelligent power-saving control is performed based on the intelligent power-saving control method. The current power usage status includes the remaining power, the current temperature measurement curve and the analysis results.

[0006] Compared with the prior art, the embodiments of the present application have the following advantages: an acquisition control signal is sent to the networked fiber optic demodulator via the seismic recorder, which is used to set the acquisition parameters, working status, etc. of the fiber optic demodulator node, control the fiber optic demodulator to demodulate the seismic waves sensitive to the detector array, and send the demodulated seismic signal to the seismic recorder according to the network transmission protocol. The fiber optic demodulator includes a first timer, and the seismic signal transmitted back to the seismic recorder includes a first time mark information, which is used to calibrate the seismic data acquisition time with other time mark information; the fiber optic demodulator also includes a power status monitoring circuit for intelligent power saving control. In order to reduce power consumption and increase the working time of the system, some active components and circuits of the fiber optic demodulator are in standby or off state. Therefore, the acquisition control signal includes an intelligent power saving control instruction, which is used to start the active components in the standby or off state inside the fiber optic demodulator.

[0007] The intelligent power-saving control instructions are combined with the current power usage status (including the remaining power evaluated based on the current power supply voltage, the current power consumption speed curve and power-saving trend analysis, etc.), as well as the time differences in advance wake-up required for different active devices or circuits that can be turned off or on standby. Based on convex optimization theory, the Lagrange multiplier method is used to match the optimal intelligent power-saving control method to ensure device performance and the quality of collected data.

[0008] In the application of the fiber optic seismic data acquisition method, a seismic recorder sends a source preparation signal to a controllable source vehicle, receives a source preparation response signal returned by the controllable source vehicle, and responds to the source preparation response signal through the seismic recorder; a source encoder processes a source scanning signal and a time stamp signal through a signal matching machine and sends them to the seismic recorder, and the source scanning signal is sent to the controllable source vehicle to generate seismic waves, and the time when the time stamp signal is sent is used as the source excitation time; in the seismic recorder, the seismic signal is intercepted in real time according to the source excitation time, and the intercepted seismic signal is correlated with the source scanning signal to obtain an original shot gather record, which is obtained based on the collected seismic wave; if the original shot gather record does not meet the preset data requirements, the original shot gather record is filtered. If the filtered original shot gather record still does not meet the preset data requirements, the seismic wave is re-issued at the current shot point and a new shot gather record is collected until a shot gather record that meets the preset data requirements is obtained.

[0009] In this way, the fiber optic seismic data acquisition system and the source excitation system can be deeply integrated through the signal matching machine to achieve signal matching and synchronous acquisition between the fiber optic seismic data acquisition system and the source excitation system, solving the problem of untimely quality control of seismic data in the continuous acquisition of current fiber optic seismic equipment and the need for subsequent offline data screening, resulting in low efficiency of fiber optic seismic data acquisition. It not only reduces the time of field tests, but also reduces the cost of fiber optic seismic data acquisition tests. It also realizes power-saving control of the fiber optic demodulator through intelligent power-saving instructions, further improves data acquisition efficiency, and enhances the practicality of the fiber optic seismic data acquisition system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0011] Figure 1 This is a schematic diagram of an existing optical fiber seismic data interception and related processing provided by an embodiment of the present application;

[0012] Figure 2 This is a flow chart of a method for collecting optical fiber data provided by an embodiment of the present application;

[0013] Figure 3 This is a schematic diagram of a signal matching mechanism provided in an embodiment of the present application;

[0014] Figure 4 1 is a schematic diagram of another signal matching mechanism provided in an embodiment of the present application;

[0015] Figure 5 This is a schematic diagram of the integration of an optical fiber seismic data acquisition system and a seismic source excitation system provided in an embodiment of the present application;

[0016] Figure 6 This is a signal flow diagram of a fiber optic data acquisition method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0017] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0018] In the field of seismic exploration, explosive pulse sources and large vehicle-mounted controllable vibrators are currently the main methods used to excite seismic waves. Explosives are extremely special (difficult to approve, highly dangerous, and environmentally damaging), while controllable vibrators are safe and environmentally friendly. The output, scanning time, phase, frequency, and other parameters of the scan signal they excite can be adjusted based on the surface conditions and deep seismic geological characteristics of different work areas. As environmental protection and work safety requirements become increasingly stringent, explosive sources are no longer permitted in most cases. This has led to an increasing proportion of vibrator exploration technology as the preferred source of exploration for deep-depth exploration, especially in densely populated areas such as urban economic clusters and areas with important facilities.

[0019] The vibroseis excitation system includes a vibroseis vehicle, a source encoder, a source decoder, an encoder radio, a decoder radio, a vehicle radio, a source setting host computer, etc. The source setting host computer is used to set the source excitation parameters to produce a source scanning signal.

[0020] Currently, domestic energy resource seismic exploration methods primarily utilize dynamic coil sensor technology (flagship products include the French Sercel-428XL system). However, these dynamic coil-based seismic detection systems generally suffer from issues such as small dynamic range, low sensitivity, leakage, power supply difficulties, high electromagnetic interference, and slow data transmission, which to some extent restrict the development of seismic exploration technology. Fiber-optic seismic data acquisition systems based on fiber-optic interferometry offer technical advantages such as high sensitivity, no need for power supply in the acquisition chain, immunity to electromagnetic interference, and fast data transmission speeds. These systems can address these issues with traditional seismic detection systems and have broad application prospects in scenarios such as oil and gas mineral exploration and geological surveys. However, since existing vibrator excitation systems are designed for dynamic coil seismic data acquisition systems, their software and hardware interfaces are incompatible with fiber-optic seismic data acquisition systems, making it impossible to directly integrate fiber-optic seismic data acquisition systems with vibrator excitation systems.

[0021] The existing fiber optic seismic data acquisition system and the joint test acquisition of controllable source usually adopt the data acquisition method of continuous recording earthquakes. The synchronous acquisition of fiber optic seismic data is based on the TB (Time Break) time corresponding to the Global Positioning System (GPS) timing clock of the controllable source encoder. In the field of earthquake detection, it can be used to provide a time reference related to the source. When storing seismic data, the time corresponding to the GPS timing of the fiber optic demodulator is entered into the seismic data file name, and the sampling point corresponding to the TB is searched later. Then, the original data is intercepted to achieve the synchronization of source excitation and data storage. This continuous data acquisition method cannot correlate the scanning signal with the received signal in real time to obtain the reflection signal of the stratum, which is not conducive to the real-time quality control of the collected fiber optic seismic data. Offline processing is required to screen the collected fiber optic seismic data, which reduces the efficiency of fiber optic seismic data acquisition.

[0022] Figure 1 This is a schematic diagram of an existing fiber optic seismic data interception and related processing provided by the embodiment of the present application, combined with Figure 1 A brief description of the existing fiber optic seismic data acquisition is given. The existing fiber optic seismic data capture adopts a continuous recording method, that is, after the software is started, all the connected channels are recorded continuously at the same time. Later, the TB time is used to search for the onset time for capture and redundant data is cut off. The file format formed by the seismic channel record activated by a single fiber optic demodulator is divided into four sections. The first section of the file name is the demodulator number, the second section is the file start time, the third section is the file end time, and the fourth section is the number of all channels of the demodulator contained in the file. The start and end times of the file are written through GPS marking, which are all UTC Beijing time, in the order of month-day-year-hour-minute-second, of which the second section is accurate to 0.0001 second. The source encoder records the GPS-UTC time of the TB signal. Later, the TB time and data GPS time can be used to match the capture of the single shot raw data and then correlate it with the scanning signal to form the shot data. The schematic diagram of fiber optic seismic data capture and related processing is shown in the figure below. Figure 1 As shown. Figure 1 As can be seen in the figure, the starting data point and the ending data point are searched according to the TB absolute time (UTC time), the scanning time and the recording time, and then the time of the starting data point is reset to 0s. The correlated seismic shot gather data is obtained by cross-correlating the scanning signal with it.

[0023] However, this continuous data acquisition mode cannot correlate the scanning signal with the received signal in real time to obtain the reflection signal of the stratum, which is not conducive to timely quality control of the collected fiber optic seismic data. It is necessary to process the collected fiber optic seismic data offline to screen the collected fiber optic seismic data, which reduces the efficiency of fiber optic seismic data acquisition. In high-density, large-scale seismic data acquisition tests, there are generally more people participating in the test. Therefore, the lower the test efficiency, the longer the test time, and the higher the test cost. The present invention adopts a fiber optic data synchronous acquisition method to perform fiber optic seismic data quality control at each measuring point in a timely manner. It can timely control and ensure the data quality of fiber optic seismic data acquisition, so as to improve the efficiency of seismic data acquisition and save the time and test cost of field tests.

[0024] Therefore, the present application provides a fiber optic data acquisition method, that is, performing fiber optic seismic data quality control at each measuring point, which can timely control and ensure the data quality of fiber optic seismic data acquisition, improve the efficiency of fiber optic seismic data acquisition, and save the time and test costs of field tests.

[0025] A method for collecting optical fiber data according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0026] Figure 2 This is a flow chart of a method for collecting optical fiber data provided by an embodiment of the present application. Figure 2 As shown, the optical fiber data acquisition method includes:

[0027] S201, detecting environmental noise through a seismic recorder. When the environmental noise meets the preset noise requirement, the seismic recorder sends a source preparation signal to the controllable vibrator vehicle, receives a source preparation response signal returned by the controllable vibrator vehicle, and responds.

[0028] Specifically, the fiber optic seismic data acquisition system and the source excitation system can be matched through a signal matching machine to achieve software and hardware matching integration of the fiber optic seismic data acquisition system and the source excitation system. The time mark signal and source scanning signal generated by the source excitation system can be processed and transmitted to the fiber optic data acquisition system to achieve interaction and data synchronization between the fiber optic data acquisition system and the source excitation system, as well as efficient acquisition of fiber optic seismic data.

[0029] The fiber-optic seismic data acquisition system includes a fiber-optic geophone array, a seismic recorder, a fiber-optic demodulator, and a signal matching machine. The source excitation system consists of a controllable vibrator vehicle, a source encoder, a source decoder, an encoder radio, a decoder radio, a vehicle radio, and a source configuration host computer. The source configuration host computer is used to set the source excitation parameters to generate the source scanning signal.

[0030] Among them, the fiber optic seismic data acquisition system includes a data acquisition unit and a data synchronization recording unit. The data acquisition unit is composed of a fiber optic detector array, a fiber optic demodulator, etc., and the data synchronization recording unit is composed of a signal matching machine, a switch, a seismic recorder, etc.

[0031] A seismic recorder can be understood as a component that functions as both a quality control computer and a data logging workstation. It includes built-in quality control software and fiber-optic seismic data acquisition software, enabling functions such as data acquisition parameter configuration, intelligent power-saving monitoring and control, survey line management, equipment self-test and status monitoring, data logging, and data quality control. The preset noise requirements can be determined by personnel based on the conditions at the seismic data acquisition site and are not limited here.

[0032] Furthermore, the seismic recorder's built-in fiber-optic seismic data acquisition software enables the setting of blasting schedules and acquisition parameters, as well as current temperature monitoring, power usage monitoring, and intelligent power-saving control. The software consists of a waveform monitoring module, a construction layout module, a blasting control module, an intelligent power-saving module, and a plotting output module, each designed and implemented using the MVC software architecture model. The acquisition parameters are used to control the operating parameters of networked devices such as the fiber-optic demodulator, and the blasting schedule is pre-set according to the test plan. All of these functions are implemented in the blasting control module of the fiber-optic seismic data acquisition software.

[0033] S202, sending an acquisition control signal to the networked fiber optic demodulator through the seismic recorder to set the acquisition parameters and working status of the fiber optic demodulator node, controlling the fiber optic demodulator to demodulate the seismic waves sensitive to the detector array to obtain a demodulated seismic signal, and sending the seismic signal to the seismic recorder according to the network transmission protocol. The seismic signal includes a first time mark information, and the first time mark information is obtained based on the first timer in the fiber optic demodulator.

[0034] Among them, the first timer is a global positioning system timer, and the second timer described below is also a global positioning system timer. The first and second are only used to distinguish different locations. The first time mark information and the second time mark information also only represent the TB signals corresponding to the global positioning system timers at different locations.

[0035] S203, obtain the seismic source scanning signal through the seismic source encoder, and send the seismic source scanning signal to the seismic recorder through the signal matching machine. At the same time, the seismic source encoder sends a second time mark signal which is transmitted to the seismic recorder through the signal matching machine, and the controllable seismic source vehicle responds to the seismic source scanning signal to generate seismic waves. The second time mark signal is obtained based on the second timer.

[0036] Specifically, when the source encoder receives the source ready response signal, it delays for a few seconds to send an encoded source scanning signal to the source vehicle to generate seismic waves, and transmits the source scanning signal and the second time mark signal sent by the source encoder to the seismic recorder through the signal matching machine. At the same time, the recording of seismic data in the seismic recorder is started, and the time when the second time mark signal is sent is used as the source excitation time. The second time mark signal is used to mark the exact time of source excitation, and is used in combination with the GPS timestamp of the data band transmitted by the optical fiber demodulator to calibrate the seismic data acquisition time to ensure the consistency between the actual recording time of the seismic data and the source excitation time.

[0037] S204, in the seismic recorder, the seismic signal is intercepted in real time according to the source excitation time, and the intercepted seismic signal is correlated with the source scanning signal to obtain the original shot gather record, where the source excitation time is the time when the time mark signal is emitted.

[0038] In some embodiments, seismic signals are obtained based on collected seismic waves, including: a fiber optic detector array is sensitive to seismic waves, and the seismic waves are modulated into phase information of an optical interference signal; the interference signal is transmitted to a fiber optic demodulator, and the fiber optic demodulator demodulates the optical signal into seismic information; the seismic information is sent to a seismic recorder through the fiber optic demodulator, and the seismic recorder stores the seismic information.

[0039] Specifically, seismic data is collected through fiber optic vibration detection technology, and a large-scale multiplexed fiber optic detector array can be sensitive to seismic waves. The seismic wave signals are excited by a controllable source and reflected by the stratum.

[0040] After the fiber optic detector array senses the seismic waves, the seismic waves are modulated into the phase information of the optical interference signal. The interference signal is transmitted from the fiber optic detector array to the fiber optic demodulator through the optical fiber, and demodulated into seismic information in the fiber optic demodulator. The seismic information contains relevant information about the seismic waves, such as amplitude, frequency, phase, etc.

[0041] Furthermore, the seismic information can be transmitted to a seismic recorder via optical fiber communication or a network interface. The seismic recorder stores and manages the seismic information to obtain a seismic signal, which can serve as the basis for subsequent seismic exploration and data analysis.

[0042] According to the technical solution provided in the above embodiment, high-precision acquisition and storage of seismic wave signals are achieved through fiber-optic vibration detection technology, which combines the advantages of fiber-optic detector arrays, fiber-optic demodulators and seismic recorders to provide an efficient and stable technical solution for earthquake detection.

[0043] After obtaining the seismic signal, the recorded seismic signal can be first intercepted in real time according to the source excitation time, and then correlated with the source scanning signal to obtain the original shot gather record.

[0044] S205: If the original shot gather record does not meet the preset data requirements, the original shot gather record is filtered. If the filtered original shot gather record still does not meet the preset data requirements, seismic waves are re-emitted at the current shot point and new shot gather records are collected until a shot gather record that meets the preset data requirements is obtained.

[0045] Specifically, before collecting optical fiber data, a blasting schedule may be set up to record relevant information of the blasting points.

[0046] After obtaining the original shot gather records, they can be observed (i.e., seismic data quality monitoring) to determine whether the original shot gather records meet the preset data requirements. For example, whether parameters such as the event axis and signal-to-noise ratio meet the requirements. Specific preset data requirements can be formulated based on actual conditions.

[0047] If the requirements are met, the system proceeds to the next shot point according to the preset shot schedule. If not, the original shot gather data is filtered and the filtered data is observed to see if it meets the requirements. If so, the system proceeds to the next shot point. If not, the system re-fires at that shot point (i.e., the source vehicle restarts the seismic), collects data, and performs quality control until the seismic data at that shot point meets the requirements. The system then proceeds to the next shot point. The firing parameters of each shot point (including shot point location, scan frequency, scan time, sampling rate, shot sequence number or time) are recorded to filter out the original shot gather data that meets the requirements based on the shot time or sequence.

[0048] It should be noted that the record diagram can be printed out by a plotter, which can be connected to a switch to print the original seismic data record or the filtered shot gather data record, so that technicians can perform quality control based on the data record.

[0049] In this way, the deep integration of the fiber optic seismic data acquisition system and the controllable vibrator is completed by matching the software and hardware through the signal matching machine, and the synchronous online acquisition of the fiber optic seismic data acquisition system and the vibrator excitation system is realized, which solves the problem of untimely quality control of seismic data in the offline acquisition of current fiber optic seismic equipment and the need for subsequent offline data screening, resulting in low efficiency of seismic data acquisition. It reduces the time of field tests, reduces the cost of seismic data acquisition tests, and enhances the practicality of the fiber optic seismic data acquisition system.

[0050] In the above embodiment, based on the efficient acquisition of optical fiber seismic data by the signal matching machine, the optical fiber demodulator can also be intelligently controlled to save power. The solution is as follows:

[0051] In some embodiments, a fiber optic seismic data acquisition system and a source excitation system are matched by a signal matching machine to achieve efficient acquisition of fiber optic seismic data. The fiber optic seismic data acquisition system includes a fiber optic detector array, a seismic recorder, a fiber optic demodulator, and a signal matching machine. The source excitation system includes a source setting host computer, a source encoder, a source decoder, and a controllable vibrator vehicle.

[0052] An acquisition control signal is sent to the optical fiber demodulator through the seismic recorder, and the acquisition control signal includes an intelligent power-saving control instruction, which is used to control the power consumption of active devices and circuits in the optical fiber demodulator that are in standby or off state; the optical fiber demodulator includes a first timer, a temperature detection circuit, and a power status monitoring circuit. The first timer in the optical fiber demodulator is used to add a first time mark signal to the seismic signal, and the first time mark signal is used to calibrate the acquisition time of the optical fiber seismic data. The temperature detection circuit is used to collect current ambient temperature data, and the power status monitoring circuit is used to transmit the power status of the power supply to the seismic recorder, so as to obtain the remaining power of the power supply by intelligent power-saving control based on the discharge curve of the power supply and by comparing the current voltage of the power supply with the discharge curve;

[0053] Generate a temperature fitting prediction curve based on the current temperature measurement curve and historical ambient temperature data of the power consumption module in the optical fiber demodulator; obtain a current power consumption rate curve based on the power consumption module's power attenuation rate data; perform node trend analysis based on the current power consumption rate curve, the temperature fitting prediction curve, historical data on the power supply discharge rate, and the startup time of the active device to obtain analysis results. The power consumption module includes active devices and circuits;

[0054] In response to the intelligent power-saving control instruction, combined with the current power usage status and the difference in the time required to wake up in advance for different active devices or circuits that can be turned off or on standby, the Lagrange multiplier method is used according to convex optimization theory to obtain an intelligent power-saving control method, and intelligent power-saving control is performed based on the intelligent power-saving control method. The current power usage status includes the remaining power, the current temperature measurement curve and the analysis results.

[0055] Specifically, the fiber optic demodulator includes a first timer. The seismic signal transmitted back to the seismic recorder includes a first time stamp, which is used to calibrate the seismic data acquisition moment (for matching and calibrating with the second time stamp). The fiber optic demodulator also includes a temperature monitoring circuit for collecting current ambient temperature data. The fiber optic demodulator also includes a power status monitoring circuit that transmits the power status of the power supply (such as the current voltage value) to the seismic recorder for intelligent power saving control. Using the power supply's discharge curve as a reference, the remaining power of the power supply can be assessed by comparing the current voltage with the discharge curve.

[0056] Since some active components of the optical fiber demodulator are in standby or off state in order to reduce power consumption and increase system working time, the acquisition control signal should include intelligent power-saving control instructions for intelligently controlling the startup of active components in the optical fiber demodulator that are in standby or off state.

[0057] Since the main power-consuming modules of a fiber optic demodulator include the laser light source, acousto-optic modulator, optical amplifier, and demodulation circuit, different modules require different startup times for normal operation to ensure device performance and data quality. Furthermore, the power supply's power consumption rate varies in different environments (such as high and low temperatures). Based on the current measured temperature curve and local historical temperature data, a high and low temperature (least squares) fitting prediction envelope curve, i.e., a temperature fitting prediction curve, can be generated. This results in a high temperature maximum prediction curve, a low temperature minimum prediction curve, and a normal temperature prediction curve. The normal temperature fitting curve is simply the mean of the corresponding envelope curve data at that temperature point. The normal temperature range is set to 10°C to 30°C, the high temperature unit is set to above 30°C, and the low temperature unit is set to below 10°C. Based on the power decay rate data collected, a current power consumption rate curve can be generated. Node trend analysis can be performed based on the current power consumption rate curve, the temperature fitting prediction curve, historical data on power supply discharge rates in high and low temperature environments, and the startup time of different components (or circuits) at different temperatures.

[0058] Therefore, the intelligent power-saving control instructions are combined with the current power usage status (including the remaining power evaluated based on the current power supply voltage, the current temperature measured curve and power-saving trend analysis, etc.), as well as the time differences in advance awakening required for different active devices or circuits that can be turned off or on standby. Based on convex optimization theory and the Lagrange multiplier method, the optimal intelligent power-saving control method is matched.

[0059]

[0060] In the above formula, P j is the power consumption, T i is the measured temperature change curve, SC is the current remaining power, T maxis the maximum gradient of the temperature fitting prediction curve at the current temperature, t1 is the delayed startup time of the first device (or circuit), t n is the delayed start-up time of the nth device (or circuit), f1(·) is the node control function of the first device (or circuit), f n (·) is the node control function of the nth device (or circuit), q 1max is the longest startup time of the first device (or circuit) at the estimated maximum value at high temperature (or the estimated minimum value at low temperature), q nmax It is the longest startup time of the nth device (or circuit) with the maximum estimated high temperature value (or the minimum estimated low temperature value).

[0061] In some embodiments, data acquisition timing is controlled by circuitry within the fiber demodulator. Sampling pulses are output via an FPGA, and internally controlled by these pulses to ensure that optical signal acquisition and carrier generation (the carrier is generated in the demodulator board's signal demodulation module) occur simultaneously. This addresses the issue of unstable demodulated signal amplitudes caused by asynchronous acquisition and carrier timing.

[0062] During signal demodulation, to minimize the impact of phase delay, optical signal acquisition and carrier generation must occur simultaneously. If the carrier signal and the acquired signal are out of sync during frequency multiplication with the interference signal, random phase differences will be introduced during mixing, leading to unstable demodulated signal amplitude and even signal blanking.

[0063] Multiply the modulated interference signal with Gcosω0t and Hcos2ω0t. If they are not synchronized, assume that the time delays between the carrier frequency Gcosω0t and the doubled frequency Hcos2ω0t and the interference signal are τ1 and τ2 respectively (that is, they become Gcos[ω0(t+τ1)] and Hcos[2ω0(t+τ2)]). After filtering the high-frequency terms through a low-pass filter, the output result is:

[0064]

[0065] Therefore, it can be seen that compared with the synchronous signal (no time delay), the result has two more terms, cosω0τ1 and cos2ω0τ2. This formula will be reflected as a coefficient in the final output result, causing the amplitude-frequency characteristics of the output result to be affected by the delay time. The wider the measured signal bandwidth, the greater the impact, which will cause trouble when calibrating the D value. If ω0τ1 or 2ω0τ2 is When , it will also cause one signal to be blanked, making the output zero.

[0066] Therefore, it is necessary to perform timing control of data acquisition. The sampling pulse is output through the FPGA. The sampling pulse is used to control the acquisition timing to ensure that the acquisition of the optical signal and the generation of the carrier are simultaneous, solving the problem of unstable amplitude of the demodulated signal caused by the asynchronous acquisition and carrier timing.

[0067] In some embodiments, it is necessary to match and compare moving-coil and fiber-optic data acquisition systems. Because moving-coil and fiber-optic geophones have different sensing mechanisms and dimensions, data acquisition requires calibration and matching for sources of different frequencies. Using a single-frequency vibration signal as an example, a comparison of these two types of geophones is performed.

[0068] The speed of a single-frequency vibration signal is:

[0069]

[0070] Then the acceleration is:

[0071]

[0072] When the vibration signal frequency is 40Hz, the maximum velocity is 100 Am / s², and the maximum acceleration is 251.2 Am / s². When the vibration signal has other frequencies, the corresponding differences in velocity and acceleration also change. The data collected by the system is compensated and corrected based on the frequency range of the vibrator.

[0073] In some embodiments, because the fiber optic data acquisition system uses fiber optic communication to transmit data at a very high transmission rate, the following data acquisition method can be used, ignoring the transmission delay of the command issued by the seismic recorder and the command execution delay of the fiber optic demodulator relative to the allowable deviation. The source encoder sends the source excitation time to the seismic recorder via a signal matching machine. The seismic recorder simultaneously transmits the acquisition command to each fiber optic demodulator on the survey line, initiating data acquisition. The starting time of data acquisition can be approximately considered to be the source excitation time, which is also the data recording time. This data acquisition method has high requirements for the response speed of the seismic recorder and fiber optic demodulator. Its advantage is that it can eliminate the step of data interception based on the GPS timing, thereby improving execution efficiency.

[0074] In some embodiments, the source scanning signal is sent to the seismic recorder through a signal matching machine, and at the same time, the source encoder sends a second time mark signal and transmits it to the seismic recorder through the signal matching machine, including: sending the source scanning signal and the second time mark signal to the seismic recorder through the signal matching machine; when the source encoder is connected to the second timer, and the source scanning signal and the second time mark signal are both digital signals, the signal matching machine includes a field programmable gate array (FPGA) and a network communication sub-circuit, and the signal matching machine is respectively connected to the switch and the source encoder, wherein the switch represents a transit connector connecting the seismic recorder and the signal matching machine; when the source encoder is not connected to the second timer, and the source scanning signal and the second time mark signal are both analog signals, the signal matching machine includes an analog-to-digital converter, an FPGA and a network communication sub-circuit, and the signal matching machine is respectively connected to the second timer, the switch and the source encoder.

[0075] Specifically, the signal matching machine can be used to realize the software and hardware matching integration of the fiber optic seismic data acquisition system and the source excitation system, thereby solving the problem of mismatch between the existing source excitation system and the fiber optic seismic data acquisition system due to differences in software and hardware interfaces.

[0076] Among them, the components and connection components of the signal matching machine can be adaptively adjusted based on whether the source encoder is connected to the GPS timer or whether the source encoder is connected to the GPS interface. The switch and the signal matching machine can be connected through a network cable, so that the software and hardware interfaces can be matched through the signal matching machine to realize real-time signal acquisition.

[0077] In other embodiments, when the source encoder is connected to a second timer and the source scanning signal and the second time mark signal are both digital signals, the source scanning signal and the second time mark signal are sent to the seismic recorder through a signal matching machine, including: completing the conversion of the network communication interface protocol (such as TCP / IP protocol or UDP protocol) matching the source encoder and the seismic recorder through FPGA; outputting to the switch through the network communication sub-circuit with an RJ45 interface, and forwarding the source scanning signal and the second time mark signal to the seismic recorder through the switch.

[0078] like Figure 3 As shown, Figure 3 This is a schematic diagram of a signal matching mechanism provided in an embodiment of the present application. Figure 3 This embodiment will be described.

[0079] When the source encoder is connected to the second timer (GPS timer) and the source scanning signal and the second time mark signal (TB signal) are both digital signals, the signal matching machine is composed of FPGA and network communication sub-circuit, and the source encoder and network communication interface protocol (such as TCP / IP protocol or UDP protocol) can be converted by FPGA. At this time, the signal matching machine is connected to the switch and the source encoder respectively, receiving the TB time and source scanning signal of the source encoder, which is used to provide the TB time and source scanning signal to the seismic recorder.

[0080] According to the technical solution provided in the above embodiment, the signal matching machine uses the hardware interface and software protocol matched with the source encoder and seismic recorder to enable the source scanning signal and TB signal to be transmitted in a standardized manner, avoiding the problem of data asynchrony, so that both signals can be reliably received and analyzed by the seismic recorder. The use of standardized protocols supported by the RJ45 interface and network communication sub-circuit enhances compatibility with existing equipment and improves the stability of signal transmission.

[0081] In other embodiments, when the source encoder is not connected to the second timer and the source scanning signal and the second time mark signal are both analog signals, the source scanning signal and the second time mark signal are sent to the seismic recorder through a signal matching machine, including: performing analog-to-digital conversion on the source scanning signal and the second time mark signal through an analog-to-digital converter to obtain a digitized source scanning signal and a digitized second time mark signal; performing falling edge triggering on the digitized time mark signal through a falling edge triggered timing module in the FPGA, and recording the clock signal from the second timer to obtain a second time mark signal with a time mark; encapsulating the second time mark signal with a time mark and the digitized source scanning signal through a network communication sub-circuit according to the network communication protocol, and transmitting the encapsulated second time mark signal with a time mark and the digitized source scanning signal to the seismic recorder through a switch.

[0082] Figure 4 This is another schematic diagram of a signal matching mechanism provided in an embodiment of the present application. Figure 4 This embodiment will be described.

[0083] Specifically, when the source encoder is not connected to the second time signal receiver (GPS time signal receiver), the signal matching machine can be designed and optimized, and the signal can be transmitted in combination with the analog-to-digital converter, FPGA and network communication sub-circuit. At this time, the signal matching machine can be connected to the GPS time signal receiver, the switch and the source encoder respectively, where the GPS time signal receiver can add a time stamp to the second time mark signal (TB signal), so that even if the source encoder is not connected to the GPS time signal receiver, the system can still record the TB signal with the time stamp, reducing the dependence on direct access to the GPS time signal receiver and improving the flexibility and robustness of the system operation.

[0084] The source scanning signal and TB signal are converted into digital form by an analog-to-digital converter, and the analog signal is digitized. This can avoid noise interference caused by analog signal transmission and improve the integrity and accuracy of data transmission.

[0085] Furthermore, the falling-edge-triggered timing module in the FPGA can time-stamp the source sweep signal and TB signal based on the falling edge of the TB signal, combined with the clock signal provided by the GPS timer. Even if the source encoder is not directly connected to the GPS timer, a time reference can be obtained through the signal matching module to ensure signal timing consistency. The communication protocol conversion module converts the time-stamped TB signal and the source sweep signal into a communication protocol. The time-stamped TB signal and the source sweep signal are then packaged and transmitted via the network communication subcircuit. The packaged time-stamped TB signal and the digitized source sweep signal are then transmitted to the seismic recorder via the network communication subcircuit and a switch. The source sweep signal output by the source encoder undergoes A / D conversion and is returned to the seismic recorder. It is then cross-correlated with the original seismic data to synthesize raw shot gather data for seismic data quality control. This not only improves transmission reliability but also reduces the risk of data loss or bit errors.

[0086] The technical solutions provided in the above embodiments, through analog-to-digital conversion, time stamping, and protocol encapsulation, ensure that even when the source encoder is not connected to a GPS timer, the entire system can still achieve high-precision, low-latency, and highly stable signal transmission and recording. This flexible architectural design provides the system with broader adaptability and higher reliability, making it suitable for seismic exploration missions in complex environments.

[0087] In some embodiments, a controllable vibrator vehicle responds to the source scanning signal to generate seismic waves, including: wirelessly transmitting the source scanning signal to a decoder radio of the controllable vibrator vehicle via an encoder radio, the encoder radio being used to realize wireless communication between the source encoder and the controllable vibrator vehicle; transmitting the received source scanning signal to the controllable vibrator in the controllable vibrator vehicle via the decoder radio, and the controllable vibrator starting the source device based on the received source scanning signal to excite seismic waves.

[0088] Specifically, wireless communication between the encoder radio and the decoder radio can simplify device deployment and signal transmission paths, eliminating the limitations of traditional wired connections.

[0089] In this way, through the comprehensive application of wireless communication, modular design and efficient signal transmission, the system operation is simple, adaptable and reliable, and the overall performance and practicality of the seismic wave generation system are greatly improved.

[0090] In some embodiments, shot gather records that meet preset data requirements are stored in SEG-D format.

[0091] Among them, SEG-D can be used to store and transmit multi-channel seismic exploration data. It has flexibility and high-precision storage capabilities, which can help the system efficiently store and preliminarily process original shot gather records.

[0092] Figure 5 This is a schematic diagram of an integrated optical fiber data acquisition system and a source excitation system provided in an embodiment of the present application. Figure 5 Further explanation of this application.

[0093] In the fiber-optic data acquisition system and source excitation system, the source encoder can be equipped with GPS to record the time of source TB as the source excitation time. The source encoder is connected to the encoder radio, which communicates with the decoder radio on the controllable source vehicle via wireless communication to send source scanning signals, etc. The switch serves as a transit connector, connecting to the seismic recorder, fiber-optic seismograph line interface, plotter, NSAA disk, and signal matching machine to implement functions such as command transmission and information exchange. The source setting host computer is connected to the source encoder, and the source scanning signal is generated by the source-specific software and sent to the source encoder. The seismic recorder has the functions of a quality control computer and data recording workstation, with built-in quality control software and seismic data acquisition software, which can realize functions such as data acquisition parameter configuration, line management, data recording, data quality control, current temperature monitoring, power status monitoring and intelligent power saving control.

[0094] The fiber-optic seismograph line interface can be used to receive commands from the recorder and upload seismic data. A plotter can be used to print raw seismic data or filtered shot gather data, facilitating quality control based on the data. The NASS disk can be connected to a switch via an Ethernet interface to back up stored seismic data. The signal matching engine can be used to integrate the software and hardware of the seismic recorder with the source encoder, achieving deep integration of fiber-optic seismic data acquisition and the source excitation system.

[0095] In this way, the deep integration of the fiber optic seismic data acquisition system and the controllable source system is completed through the matching of software and hardware, and the synchronization of fiber optic data acquisition and source excitation is achieved. The problem of low efficiency of seismic data acquisition caused by untimely quality control of seismic data due to the mismatch between the fiber optic seismic data acquisition system and the existing source excitation system is solved, the time of field tests is reduced, the cost of seismic data acquisition tests is reduced, and the practicality of the fiber optic seismic data acquisition system is enhanced.

[0096] The above equipment is located inside the data acquisition vehicle. The onboard radio in the vehicle is used to communicate with the onboard radio in the vibrator vehicle to confirm readiness and other status.

[0097] Figure 6 This is a signal flow diagram of a fiber optic data acquisition method provided by an embodiment of the present application. Figure 6 Further explanation of this application.

[0098] like Figure 6 As shown, the fiber optic seismic data acquisition system and the source excitation system can be integrated through a signal matching machine, and the instrument vehicle and the controllable source vehicle can exchange information through wireless communication of the vehicle radio.

[0099] Specifically, a fiber-optic detector array senses seismic wave signals and transmits this information to a fiber-optic demodulator. The fiber-optic demodulator and seismic recorder exchange information via optical communication. The seismic recorder sends acquisition control signals to the fiber-optic demodulator and receives seismic wave pickup signals sent back by the fiber-optic demodulator. The seismic recorder and encoder are interconnected via a signal matching machine. The vibrator vehicle includes an onboard radio, a decoder radio, a source decoder, and the vibrator. Wireless communication between it and the instrument vehicle enables interaction between source scanning signals, source preparation signals, and source response signals.

[0100] In the specific signal transmission process, the upper computer can first stimulate the source scanning signal through the source setting, and the seismic recorder sends an acquisition control signal to all networked fiber optic demodulators in the survey line. After receiving the source ready signal, the seismic recorder receives the earthquake information transmitted from the fiber optic demodulator.

[0101] The instrument vehicle sends a source sweep signal to the vibrator vehicle. This process is achieved through wireless communication between the encoder and decoder radios. In the vibrator vehicle, the decoder radio receives the source sweep signal, decodes it on the source decoder, and then sends the decoded source sweep signal to the vibrator to stimulate seismic waves.

[0102] After the source scanning signal, TB signal and seismic information are sent to the seismic recorder, the original signal of the seismic wave can be intercepted in real time according to the source excitation time. Then, the intercepted seismic signal is correlated with the source scanning signal to obtain the original shot gather record for data quality control.

[0103] It should be noted that during operation, the equipment can be adaptively powered to the equipment that needs power, for example, 220V AC power can be provided to the seismic recorder and 12V DC power can be provided to the optical fiber demodulator.

[0104] In this way, efficient coordination between the software and hardware of the fiber optic seismic data acquisition system and the source excitation system can be achieved through means such as signal matching machines, thereby realizing synchronous data acquisition and real-time data quality control, greatly improving the efficiency of seismic data acquisition.

[0105] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present application, and will not be described in detail here.

[0106] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0107] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for collecting optical fiber data, characterized in that: include: The fiber-optic seismic data acquisition system and the source excitation system are matched by a signal matching machine to achieve efficient acquisition of fiber-optic seismic data. The fiber-optic seismic data acquisition system includes a fiber-optic detector array, a seismic recorder, a fiber-optic demodulator, and a signal matching machine. The source excitation system includes a source setting host computer, a source encoder, a source decoder, and a controllable vibrator vehicle. detecting environmental noise through a seismic recorder, and when the environmental noise meets a preset noise requirement, transmitting a source preparation signal to the vibrator vehicle through the seismic recorder, and receiving and responding to a source preparation response signal returned by the vibrator vehicle; Sending an acquisition control signal to a fiber optic demodulator in the network through the seismic recorder to set acquisition parameters and working status of the fiber optic demodulator node, controlling the fiber optic demodulator to demodulate seismic waves sensitive to the detector array to obtain a demodulated seismic signal, and sending the seismic signal to the seismic recorder according to a network transmission protocol, wherein the seismic signal includes first time stamp information, and the first time stamp information is obtained based on a first timer in the fiber optic demodulator; A source scanning signal is obtained by a source encoder, and the source scanning signal is sent to a seismic recorder through a signal matching machine. At the same time, a second time mark signal is sent by the source encoder and transmitted to the seismic recorder through the signal matching machine, and a controllable vibroseis vehicle responds to the source scanning signal to generate seismic waves, wherein the second time mark signal is obtained based on a second timer; In a seismic recorder, the seismic signal is intercepted in real time according to the source excitation time, and the intercepted seismic signal is correlated with the source scanning signal to obtain an original shot gather record, wherein the source excitation time is the time when the time mark signal is emitted; If the original shot gather record does not meet the preset data requirements, the original shot gather record is filtered. If the filtered original shot gather record still does not meet the preset data requirements, seismic waves are re-emitted at the current shot point and new shot gather records are collected until a shot gather record that meets the preset data requirements is obtained.

2. The method according to claim 1, characterized in that The method of sending the source scanning signal to the seismic recorder via a signal matching machine and simultaneously sending a second time mark signal from the source encoder to the seismic recorder via the signal matching machine includes: sending the source scanning signal and the second time mark signal to a seismic recorder via a signal matching machine; When the source encoder is connected to the second timer, and the source scanning signal and the second time mark signal are both digital signals, the signal matching machine includes a field programmable gate array FPGA and a network communication subcircuit, and the signal matching machine is connected to the switch and the source encoder respectively, wherein the switch represents a transfer connector connecting the seismic recorder and the signal matching machine; When the source encoder is not connected to the second timer, and the source scanning signal and the second time mark signal are both analog signals, the signal matching machine includes an analog-to-digital converter, an FPGA, and a network communication sub-circuit, and the signal matching machine is respectively connected to the second timer, the switch, and the source encoder.

3. The method according to claim 2, characterized in that When the source encoder is connected to the second timer, and the source scanning signal and the second time mark signal are both digital signals, the source scanning signal and the second time mark signal are sent to the seismic recorder through the signal matching machine, including: Performing protocol conversion on the source scanning signal and the second time mark signal through FPGA to obtain the converted source scanning signal and the converted second time mark signal; The converted source scanning signal and the converted second time mark signal are output to the switch via the RJ45 interface through the network communication sub-circuit, and the converted source scanning signal and the converted second time mark signal are forwarded to the seismic recorder through the switch.

4. The method according to claim 2, characterized in that When the source encoder is not connected to the second timer, and the source scanning signal and the second time mark signal are both analog signals, the step of sending the source scanning signal and the second time mark signal to the seismic recorder through a signal matching machine includes: Performing analog-to-digital conversion on the source scanning signal and the second time mark signal by the analog-to-digital converter to obtain a digitized source scanning signal and a digitized second time mark signal; Performing falling-edge triggering on the digitized second time-stamp signal through a falling-edge triggered timing module in the FPGA, and recording the clock signal from the second timer to obtain a second time-stamp signal with a time identifier; The second time-stamped signal with a time stamp and the digitized source scanning signal are encapsulated according to the network communication protocol through the network communication sub-circuit, and the encapsulated second time-stamped signal with a time stamp and the digitized source scanning signal are transmitted to the seismic recorder through the switch.

5. The method according to claim 1, wherein The step of generating seismic waves by using a controllable vibrator vehicle in response to the source scanning signal comprises: Wirelessly transmitting the source scanning signal to a decoder radio of the vibrator vehicle via an encoder radio, wherein the encoder radio is used to realize wireless communication between the source encoder and the vibrator vehicle; The decoder radio transmits the received source scanning signal to the controllable vibrator in the controllable vibrator vehicle, and the controllable vibrator starts the source equipment to excite the seismic wave based on the received source scanning signal.

6. The method according to claim 1, characterized in that The controlling the optical fiber demodulator to demodulate the seismic waves to which the detector array is sensitive to obtain a demodulated seismic signal comprises: The optical fiber detector array senses the seismic waves and converts the seismic waves into phase information in the optical interference signal; The optical interference signal is sent to a fiber demodulator via optical fiber transmission, and the fiber demodulator demodulates the phase information of the optical interference signal into seismic information. The data acquisition unit of the fiber optic seismic data acquisition system includes the fiber optic detector array and the networked fiber optic demodulator, and the data synchronization recording unit includes the signal matching machine, the switch, and the seismic data recorder; The earthquake information is sent to a earthquake recorder via an optical fiber demodulator, and the earthquake recorder stores the earthquake information to generate the earthquake signal.

7. The method according to claim 1, characterized in that The shot gather records that meet the preset data requirements are stored in SEG-D format.

8. An intelligent power saving control method, characterized in that: include: The fiber-optic seismic data acquisition system and the source excitation system are matched by a signal matching machine to achieve efficient acquisition of fiber-optic seismic data. The fiber-optic seismic data acquisition system includes a fiber-optic detector array, a seismic recorder, a fiber-optic demodulator, and a signal matching machine. The source excitation system includes a source setting host computer, a source encoder, a source decoder, and a controllable vibrator vehicle. Sending an acquisition control signal to the optical fiber demodulator through the seismic recorder, wherein the acquisition control signal includes an intelligent power-saving control instruction, and the intelligent power-saving control instruction is used to control the power consumption of active devices and circuits in the optical fiber demodulator that are in a standby or off state; The optical fiber demodulator includes a first timer, a temperature detection circuit, and a power status monitoring circuit. The first timer in the optical fiber demodulator adds a first time mark signal to the seismic signal. The first time mark signal is used to calibrate the acquisition time of the optical fiber seismic data. The temperature detection circuit is used to collect current ambient temperature data. The power status monitoring circuit is used to transmit the power status of the power supply to the seismic recorder. Based on the discharge curve of the power supply, the remaining power of the power supply is obtained by comparing the current voltage of the power supply with the discharge curve through intelligent power saving control. Generating a temperature fitting prediction curve based on a current temperature measurement curve and historical ambient temperature data of a power consumption module within a fiber optic demodulator; obtaining a current power consumption rate curve based on collected data on the power attenuation rate of the power consumption module; performing a node trend analysis based on the current power consumption rate curve, the temperature fitting prediction curve, historical data on the power supply discharge rate, and the startup time of active components to obtain an analysis result, wherein the power consumption module includes active components and circuits; In response to the intelligent power-saving control instruction, combined with the current power usage status and the difference in time required to wake up in advance for different active devices or circuits that can be turned off or on standby, according to convex optimization theory, the Lagrange multiplier method is used to obtain an intelligent power-saving control method, and intelligent power-saving control is performed based on the intelligent power-saving control method. The current power usage status includes the remaining power, the current temperature measured curve and the analysis results.

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