An Adaptive and Precise Coupling Method and System Suitable for Solid Seismic Physical Simulation

Abstract

The present invention relates to a solid seismic physical simulation coupling method and system, belonging to the technical field of seismic physical simulation, and specifically relates to an adaptive and precise coupling method and system applicable to solid seismic physical simulation. The present invention first configures a dual coordinate axis and a seismic source excitation module and a geophone receiving module, and connects the main control system with each sub-module; then connects the seismic source excitation module and the geophone receiving module with a pressure measurement module; then obtains the optimal coupling pressure value; and finally starts the main loop of precise coupling acquisition for seismic physical simulation. The present invention has the advantages of high coupling consistency and high automation degree. The high consistency of coupling at each coordinate point will ensure the high consistency of waveform characteristics such as the frequency and energy of the sub-wave at the excitation end during the physical simulation process, the consistency of energy at the receiving end, and the stability of the vibration modes of the excitation and receiving transducers, ultimately improving the accuracy of the seismic physical simulation results.

Description

Technical Field

[0001] The present invention relates to a solid seismic physical simulation coupling method and system, belonging to the technical field of seismic physical simulation, and particularly relates to an adaptive precise coupling method and system suitable for solid seismic physical simulation. Background Art

[0002] Seismic physical simulation tests are important platforms and means for the research of basic theories and method technologies of seismic exploration, and are also the basis for the design of field observation systems and the processing and interpretation of actual measured data. Therefore, they are widely valued at home and abroad. However, seismic physical simulation is an extremely challenging task, and there are great difficulties in many aspects such as transducer selection, transducer coupling, physical model material selection and proportioning, model construction, and simulated data acquisition.

[0003] Among them, in non-solid seismic physical simulation (the model is placed in a water tank), the liquid is usually used as a coupling medium, and the coupling effect of each coordinate point in the observation system can be made consistent.

[0004] For the solid seismic physical simulation coupling method and system, there are mainly two existing schemes.

[0005] One of the existing technologies in the prior art includes the following steps:

[0006] (1) Move the seismic source excitation module and the geophone receiving module to their respective starting coordinate plane positions;

[0007] (2) Manually couple the seismic source excitation module and the geophone receiving module with the model surface;

[0008] (3) Trigger the seismic source, and at the same time, the geophone records the signal;

[0009] (4) Repeat steps (2) and (3) until signal acquisition is completed at all coordinate positions.

[0010] This scheme adopts an artificial coupling method, with a slow acquisition speed and inconsistent coupling values between measurement points.

[0011] The second of the existing technologies in the prior art includes the following steps:

[0012] (1) Install a spring device at each of the seismic source module and the geophone module;

[0013] (2) Move the seismic source excitation module and the geophone receiving module to their respective starting coordinate plane positions;

[0014] (3) Move the seismic source excitation module and the geophone receiving module downward to couple with the model surface;

[0015] (4) Wait for the spring to be compressed by the pressure, trigger the seismic source, and at the same time, the geophone records the signal;

[0016] (5) Repeat steps (3) and (4) until signal acquisition is completed at all coordinate positions.

[0017] However, when adopting this solution, the coupled pressure values between measurement points are inconsistent.

[0018] Both of the above two solutions in the prior art have the drawback that the coupled pressure values are inconsistent during multiple measurements. This inconsistency will deteriorate the waveform characteristics such as the frequency and energy of the excited wavelet, and will also lead to poor energy consistency at the receiving end, and even affect the vibration modes of the excitation and receiving transducers, ultimately affecting the accuracy of the seismic physical simulation results.

[0019] In summary, providing an adaptive precise coupling method and system applicable to solid seismic physical simulation is an urgent problem to be solved in the field of solid seismic physical simulation technology. Summary of the Invention

[0020] To solve the problems existing in the above prior art, the present invention discloses an adaptive precise coupling method and system applicable to solid seismic physical simulation. The present invention first configures a dual coordinate axis and a seismic source excitation module and a geophone receiving module, and connects the main control system with each sub-module; then connects the seismic source excitation module and the geophone receiving module with a pressure measurement module; then obtains the optimal coupled pressure value; and finally starts the main loop of the precise coupling acquisition for seismic physical simulation.

[0021] To solve the above problems, the solution of the present invention is:

[0022] An adaptive precise coupling system applicable to solid seismic physical simulation, comprising:

[0023] A seismic source excitation module, on which a coupled force measuring device is provided and can move along each coordinate axis in a three-dimensional coordinate system,

[0024] A geophone receiving module, located in the same coordinate system as the seismic source excitation module, on which a coupled force measuring device is provided and can move along each coordinate axis;

[0025] A main control system, connected to the seismic source excitation module and the geophone receiving module, the main control system includes a motion control unit and a synchronization unit;

[0026] Wherein, the main control system is configured to:

[0027] When obtaining the optimal coupling pressure value mode, adjust the relative positions of the source excitation module and / or the detector receiving module with respect to the model surface, and record the coordinate positions where the relative distance between the source excitation module and the detector receiving module in the observation system is the largest, and the optimal coupling force pair when they can cooperate for the first time; among them, for one model, the coupling force pairs of all coordinates in the observation system are the values recorded at the coordinate positions where the relative distance between the source excitation module and the detector receiving module in the observation system is the largest and they can cooperate. Being able to cooperate means that the detector receiving module can receive the signal of the source excitation module under the preset acquisition parameters.

[0028] In the precise coupling acquisition mode, move the source excitation module and / or the detector receiving module to a predetermined position, and synchronously trigger the source excitation module and the detector receiving module to work when the coupling force between the source excitation module and / or the detector receiving module and the model surface reaches the optimal coupling force.

[0029] Preferably, for the above-mentioned adaptive precise coupling system applicable to solid seismic physical simulation, the main control system includes:

[0030] A motion control unit for driving the source excitation module and / or the detector receiving module to move in the three-dimensional coordinate system.

[0031] Preferably, for the above-mentioned adaptive precise coupling system applicable to solid seismic physical simulation, the main control system includes:

[0032] A synchronization unit for simultaneously triggering the source excitation module and the detector receiving module to work when the coupling force measured by the coupling force measuring device provided on the source excitation module and the detector receiving module is greater than zero or reaches the optimal coupling force.

[0033] Preferably, for the above-mentioned adaptive precise coupling system applicable to solid seismic physical simulation, in the mode of obtaining the optimal coupling pressure value, the main control system is configured to:

[0034] When the coupling pressure value of one of the source excitation module or the detector receiving module is greater than zero, the coordinate axis of the module corresponding to the value greater than zero pauses moving. When the coupling pressure value of the other module is greater than zero, the corresponding coordinate axis of the other module also pauses moving;

[0035] When the pressure values of both pressure measurement modules are not zero, simultaneously trigger the source excitation module and the detector receiving module to work, and when it is determined that the detector receiving module cannot receive the signal of the source excitation module, under the preset number of moving times, repeatedly execute the step moving operation, the synchronous measurement operation, and the coupling judgment operation until the detector receiving module can receive the signal of the source excitation module;

[0036] Among them, the step movement operation is the operation of moving the seismic source excitation module and the geophone receiving module towards the surface of the model;

[0037] The synchronous measurement operation is the operation of simultaneously triggering the seismic source excitation module and the geophone receiving module to work;

[0038] The coupling judgment operation is the operation of judging whether the geophone receiving module can receive the signal of the seismic source excitation module.

[0039] Preferably, for the above-mentioned adaptive precise coupling system applicable to solid seismic physical simulation, the main control system also records the Z-axis movement distances of the seismic source excitation module and the geophone receiving module in the three-dimensional coordinate system corresponding to the optimal coupling force pair.

[0040] An adaptive precise coupling method applicable to solid seismic physical simulation includes:

[0041] A coupling force measuring device is respectively arranged on the seismic source excitation module and the geophone receiving module;

[0042] When obtaining the optimal coupling pressure value mode, adjust the relative positions of the seismic source excitation module and / or the geophone receiving module and the surface of the model, and record the coordinate positions of the seismic source excitation module and the geophone receiving module with the largest relative distance between the two in the observation system and the optimal coupling force pair when they can first cooperate to work;

[0043] In the precise coupling acquisition mode, move the seismic source excitation module and the geophone receiving module to the predetermined plane and height position, and then move the seismic source excitation module and the geophone receiving module along the Z-axis towards the surface of the model. When the coupling force between the seismic source excitation module and the geophone receiving module and the surface of the model reaches the optimal coupling force, simultaneously trigger the seismic source excitation module and the geophone receiving module to work, and record the Z-axis movement distance at the same time. After the current point acquisition is completed, move the seismic source excitation module and the geophone receiving module along the Z-axis in the reverse direction of the recorded Z-axis movement distance to the initial plane and height position, and then move to the plane position of the next point and continue to execute the above steps until the data acquisition of all measuring points in the observation system is completed.

[0044] Preferably, for the above-mentioned adaptive precise coupling method applicable to solid seismic physical simulation, in the mode of obtaining the optimal coupling pressure value:

[0045] When the coupling pressure value of one of the seismic source excitation module or the geophone receiving module is greater than zero, the coordinate axis of the module corresponding to the value greater than zero pauses moving. When the coupling pressure value of the other module is greater than zero, the corresponding coordinate axis of the other module also pauses moving;

[0046] When the pressure values of both pressure measurement modules are non-zero, the seismic source excitation module and the geophone receiving module are triggered to work simultaneously. And when it is determined that the geophone receiving module cannot receive the signal of the seismic source excitation module, within a preset number of movement times, the step movement operation, the synchronous measurement operation, and the coupling judgment operation are cyclically executed until the geophone receiving module can receive the signal of the seismic source excitation module;

[0047] Among them, the step movement operation is the operation of moving the seismic source excitation module and the geophone receiving module towards the surface of the model;

[0048] The synchronous measurement operation is the operation of triggering the seismic source excitation module and the geophone receiving module to work simultaneously;

[0049] The coupling judgment operation is the operation of judging whether the geophone receiving module can receive the signal of the seismic source excitation module.

[0050] Preferably, for the above-mentioned adaptive precise coupling method applicable to solid seismic physical simulation, record the Z-axis movement distances of the seismic source excitation module and the geophone receiving module in the three-dimensional coordinate system corresponding to the optimal coupling force pair.

[0051] Preferably, for the above-mentioned adaptive precise coupling method applicable to solid seismic physical simulation, in the precise coupling acquisition mode, move the seismic source excitation module and the geophone receiving module to a predetermined plane and height position, and then move the seismic source excitation module and the geophone receiving module along the Z-axis towards the surface of the model. When the coupling force between the seismic source excitation module and the geophone receiving module and the model surface reaches the optimal coupling force, trigger the seismic source excitation module and the geophone receiving module to work simultaneously, and record the Z-axis movement distance at the same time. After the current point acquisition is completed, move the seismic source excitation module and the geophone receiving module along the Z-axis in the reverse direction of the recorded Z-axis movement distance to the initial plane and height position, and then move to the plane position of the next point and continue to execute the above steps until the data acquisition of all measuring points in the observation system is completed.

[0052] Therefore, compared with the prior art, the present invention has the following advantages:

[0053] 1. High coupling consistency, and the coupling values of all coordinate points where the seismic source excitation module and the geophone receiving module are located in the observation system are the same, achieving the purpose of highly consistent coupling.

[0054] 2. High degree of automation. After the main loop of seismic physical simulation is started, the coupling of each coordinate point in the observation system does not require manual intervention, and the degree of automation is high.

[0055] The high consistency of the coupling of each coordinate point in the observation system will ensure the high consistency of waveform characteristics such as the frequency and energy of the sub-wave excited by the excitation terminal during the physical simulation process, the consistency of the energy at the receiving end, and the stability of the vibration modes of the excitation and receiving transducers; and the overall system has the characteristics of high automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 is a flowchart of a method and system for unifying the accuracy of a dual coordinate system applicable to seismic physical simulation according to the present invention;

[0057] Figure 2 is a schematic diagram of the overall structure of a method and system for unifying the accuracy of a dual coordinate system applicable to seismic physical simulation.

[0058] Figure 3 is an execution explanatory diagram of step 03-1 in a method and system for unifying the accuracy of a dual coordinate system applicable to seismic physical simulation.

[0059] Figure 4 is an execution explanatory diagram of steps 03-2 and 03-3 in a method and system for unifying the accuracy of a dual coordinate system applicable to seismic physical simulation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0061] As Figure 1 shown, a method and system for unifying the accuracy of a dual coordinate system applicable to seismic physical simulation according to the present invention has the following basic steps:

[0062] Step 01: Configure the dual coordinate axes, the seismic source excitation module, and the geophone receiving module, and connect the main control system to each sub-module;

[0063] Step 02: Connect the pressure measurement module;

[0064] Step 03: Obtain the optimal coupling pressure value;

[0065] Step 04: Start the main loop of accurate coupling acquisition for seismic physical simulation.

[0066] The following Figures 2 - 4 will specifically describe the above steps: In the following description, the subscript s represents the seismic source excitation module (which can be abbreviated as the seismic source), and the subscript r represents the geophone receiving module (which can be abbreviated as the geophone).

[0067] In step 01, it specifically includes the following sub-steps:

[0068] Step 01-1: Connect the seismic source excitation module and the geophone receiving module to two Z axes in the coordinate system respectively, Figures 2 - 4▽ represents the seismic source excitation module, and △ represents the geophone receiving module;

[0069] Step 01-2: Connect the main control system to the coordinate system, the seismic source excitation module, and the geophone receiving module. The main control system mainly includes a motion control module, a synchronization module, a signal storage module, etc. The motion control module mainly controls the movement of the seismic source excitation module and the geophone receiving module along the X, Y, and Z coordinate systems; the synchronization module is used to control the seismic source excitation module to emit signals and the geophone receiving module to receive signals; the signal storage module is used to store the energy signals received by the geophone receiving module.

[0070] The connection of the pressure measurement module in Step 02 means connecting the pressure measurement module to the seismic source excitation module and the geophone receiving module respectively and connecting it to the main control system.

[0071] The pressure measurement module is a module that has the function of accurately measuring the coupling pressure generated when the seismic source excitation module and the geophone receiving module are in contact with the model surface respectively. That is, when the seismic source excitation module (or the geophone receiving module) is coupled with the model surface, the pressure measurement module can display the pressure between the two in real time and can transmit the pressure value back to the main control system. Figures 2 - 4 In represents the pressure measurement module.

[0072] The obtaining of the optimal coupling pressure value described in Step 03 includes the following sub-steps:

[0073] Step 03-1: As Figure 3 shown, control the seismic source excitation module and the geophone receiving module to be adjusted to the same height h t , and h t is greater than the highest height h vmax of the model surface;

[0074] Step 03-2: Within the plane coordinate range of the designed observation system, use the motion control module to make the seismic source excitation module and the geophone receiving module in the position with the maximum geometric distance between them. Because it is necessary to ensure that the coupling forces of all the seismic sources in the observation system (the coordinate set of geophones and seismic sources) are a value P A , and the coupling forces of all the geophones are also a value P B (P A and P B can be equal or not equal), that is to say, the coupling force pairs of all the seismic source and geophone coordinates of a model are a pair of values (P A , P B)。Since the surface of the model is generally uneven, the moving distance of the z-axis at each coordinate is different. Therefore, to ensure that the detector can receive the signal from the seismic source when the seismic source excitation module and the detector receiving module are at the position with the maximum geometric distance between them, the other remaining coordinates can receive the signal normally.

[0075] If the boundary of the observation system is a regular rectangle, such as Figure 4 shown, the dashed box is the boundary of the observation system, then move the seismic source excitation module and the detector receiving module to the diagonal vertices of the rectangle respectively.

[0076] If the observation system is irregular, substitute the x and y coordinates of the seismic source excitation module and the detector receiving module in the observation system into the following formula respectively, find the coordinates of the seismic source excitation module and the detector receiving module when d takes the maximum value, and move the seismic source and the detector to the coordinates corresponding to the final calculation results respectively.

[0077] d = sqrt(Δx 2 + Δy 2 )

[0078] where, sqrt(*) represents taking the square root of *, Δx 2 = (x s - x r ) 2 ; Δy 2 = (y s - y r ) 2 ; In the formula, x s , x r represent the x coordinates of the seismic source excitation module and the detector receiving module respectively; y s , y r represent the y coordinates of the seismic source excitation module and the detector receiving module respectively.

[0079] Step 03-3, control the detector transfer module and the seismic source excitation module to slowly move along the positive z-axis through the motion control module, where the positive z-axis refers to the direction in which the distance between the seismic source excitation module, the detector receiving module and the model surface becomes smaller (as shown by the "+" arrow direction in Figure 4 ), and vice versa is the negative z-axis (as shown by the "-" arrow direction in Figure 4 ). When the coupling pressure value of one of the seismic source excitation module or the detector receiving module is greater than zero, the coordinate axis of the module corresponding to the value greater than zero pauses moving. When the coupling pressure value of the other module is greater than zero, the corresponding coordinate axis of the other module also pauses moving;

[0080] Taking the example that the coupling pressure value of the pressure measurement module of the seismic source excitation module is first greater than zero: The geophone pickup module and the seismic source excitation module are controlled by the motion control module to slowly move in the positive z-axis direction. When the coupling pressure value corresponding to the seismic source excitation module is greater than zero, the coordinate axis corresponding to the seismic source excitation module stops moving. At this time, the coordinate axis corresponding to the geophone module continues to move in the positive z-axis direction. When the coupling pressure value corresponding to the geophone pickup module is greater than zero, the coordinate axis corresponding to the geophone pickup module also stops moving.

[0081] Step 03-4, when both pressure values are not zero, trigger the synchronization module in the main control system. The synchronization module simultaneously triggers the seismic source excitation module and the geophone pickup module, that is, at the same moment, the seismic source emits a signal and the pickup module starts to record the signal.

[0082] Step 03-5, under the preset excitation energy and coverage times, determine whether the reflected energy of the deepest target can be recorded by the geophone pickup module. Select to execute Step A or Step B according to the judgment result:

[0083] Step A, if it can be recorded, save the pressure value of the pressure measurement module in the judgment trigger module, denoted as the optimal coupling pressure (p s ,p r ), where p s and p r respectively represent the optimal coupling pressures of the seismic source and the geophone, and at the same time record the descent distances z sh ,z rh of the geophone and the seismic source. Subsequently, execute Step 04;

[0084] Step B, if it cannot be recorded, first move the geophone module and the seismic source module forward by a distance dz, then trigger the synchronization module. Immediately, the seismic source excitation module emits a signal, and at the same time the geophone pickup module starts to store the signal. Finally, return to execute Step 03-5.

[0085] The main loop for starting the precise coupling acquisition of seismic physical simulation in Step 04 includes the following sub-steps:

[0086] Step 04-1, control the seismic source and the geophone to move in the negative z-axis direction by z sh ,z rh , and then move to the initial horizontal position (x s1 ,y s1 ),(x r1 ,y r1 ) of the observation system plane respectively, where the subscript numbers represent the coordinate numbers of the seismic source and the geophone in the observation system.

[0087] Step 04-2: Move the seismic source excitation and geophone reception module along the positive z-axis. When the pressure values of both reach the optimal coupling pressure values obtained in Step 3 (p s , p r ), trigger the synchronization module. The synchronization module controls the operation of the seismic source and geophone, and simultaneously records the positive moving distance along the z-axis (z s1 , z r1 ), where z s1 and z r1 respectively represent the moving distances of the seismic source and geophone along the z-axis.

[0088] Step 04-3: Move the seismic source and geophone along the negative z-axis by z s1 , z r1 to the next planar position of the observation system, and execute Step 04-2. When the step is completed, record the positive moving distance along the z-axis as z s2 , z r2 , where the subscript 2 represents the second pair of coordinates of the seismic source and geophone designed in the observation system. Among them, when reaching the optimal coupling pressure value, the moving distances along the z-axis corresponding to each coordinate (z si , z ri ) are not the same. si and ri respectively represent the coordinate numbers of the seismic source and geophone in the observation system. When the signal acquisition of all measuring points in the observation system is completed in a cycle, move the geophone and seismic source to the initial planar position of the observation system, that is, (x s1 , y s1 , z ht ), (x r1 , y r1 , z ht ).

[0089] From the above description, it can be seen that the solution of this embodiment has the following beneficial effects:

[0090] 1. High coupling consistency: The coupling values of all coordinate points where the seismic source excitation module and geophone reception module are located in the observation system are the same, achieving the goal of high coupling consistency.

[0091] 2. High degree of automation: After the main seismic physical cycle is started, the coupling of each coordinate point in the observation system does not require manual intervention, with a high degree of automation.

[0092] The high coupling consistency of each coordinate point in the observation system will ensure the high consistency of waveform characteristics such as the frequency and energy of the sub-wave at the excitation terminal during the physical simulation process, the consistency of the energy at the receiving end, and the stability of the vibration modes of the excitation and receiving transducers; and the overall system has the characteristic of a high degree of automation.

[0093] Finally, it should be noted that the above embodiments provide further verification of the purpose, technical solutions and beneficial effects of the present invention. This only belongs to the specific implementation examples of the present invention and is not used to limit the protection scope of the present invention. Any modifications, improvements or equivalent replacements made within the spirit and principle of the present invention shall be within the protection scope of the present invention.

Claims

1. An adaptive precise coupling system applicable to solid seismic physical simulation, characterized in that, Including: A seismic source excitation module, on which a coupling force measuring device is provided and can move along each coordinate axis in a three-dimensional coordinate system, A geophone receiving module, located in the same coordinate system as the seismic source excitation module, on which a coupling force measuring device is provided and can move along each coordinate axis; A main control system, connected to the seismic source excitation module and the geophone receiving module, the main control system includes a motion control unit and a synchronization unit; Wherein, the main control system is configured to: In the mode of obtaining the optimal coupling pressure value, adjust the relative positions of the seismic source excitation module and / or the geophone receiving module with respect to the model surface, and record the coordinate positions of the seismic source excitation module and the geophone receiving module where the relative distance between the two in the observation system is the largest, and the optimal coupling force pair when they can cooperate for the first time; In the precise coupling acquisition mode, move the seismic source excitation module and / or the geophone receiving module to a predetermined position, and synchronously trigger the seismic source excitation module and the geophone receiving module to work when the coupling force between the seismic source excitation module and / or the geophone receiving module and the model surface reaches the optimal coupling force.

2. The adaptive precise coupling system applicable to solid seismic physical simulation according to claim 1, wherein The main control system includes: A motion control unit for driving the seismic source excitation module and / or the geophone receiving module to move in the three-dimensional coordinate system.

3. An adaptive precise coupling system applicable to solid seismic physical simulation according to claim 1, characterized in that, The main control system includes: A synchronization unit for simultaneously triggering the seismic source excitation module and the geophone receiving module to work when the coupling force measured by the coupling force measuring devices provided on the seismic source excitation module and the geophone receiving module is greater than zero or reaches the optimal coupling force.

4. An adaptive precise coupling system applicable to solid seismic physical simulation according to claim 1, characterized in that, In the mode of obtaining the optimal coupling pressure value, the main control system is configured to: When the coupling pressure value of one of the seismic source excitation module or the geophone receiving module is greater than zero, the coordinate axis of the module corresponding to the value greater than zero pauses movement. When the coupling pressure value of the other module is greater than zero, the corresponding coordinate axis of the other module also pauses movement; When the pressure values of both pressure measurement modules are not zero, simultaneously trigger the seismic source excitation module and the geophone receiving module to work, and when it is determined that the geophone receiving module cannot receive the signal of the seismic source excitation module, perform a step movement operation, a synchronous measurement operation, and a coupling judgment operation in a loop for a preset number of movement times until the geophone receiving module can receive the signal of the seismic source excitation module; Wherein, the step movement operation is an operation for the seismic source excitation module and the geophone receiving module to move towards the model surface; The synchronous measurement operation is an operation for simultaneously triggering the seismic source excitation module and the geophone receiving module to work; The coupling judgment operation is an operation for judging whether the geophone receiving module can receive the signal of the seismic source excitation module.

5. The adaptive precise coupling system applicable to solid seismic physical simulation according to claim 1, characterized in that, The main control system also records the Z-axis movement distances of the seismic source excitation module and the geophone receiving module corresponding to the optimal coupling force pair in the three-dimensional coordinate system.

6. An adaptive precise coupling method applicable to solid seismic physical simulation, using an adaptive precise coupling system for solid seismic physical simulation according to any one of claims 1-5, characterized in that, Including: A coupling force measuring device is respectively provided on the seismic source excitation module and the geophone receiving module; When obtaining the optimal coupling pressure value mode, adjust the relative positions of the source excitation module and / or the geophone receiving module with respect to the model surface, and record the coordinate positions where the relative distance between the source excitation module and the geophone receiving module in the observation system is the largest, and the optimal coupling force pair when they can cooperate for the first time; In the precise coupling acquisition mode, move the source excitation module and the geophone receiving module to a predetermined plane and height position, and then move the source excitation module and the geophone receiving module along the Z-axis towards the model surface. When the coupling force between the source excitation module and the geophone receiving module and the model surface reaches the optimal coupling force, trigger the source excitation module and the geophone receiving module to work synchronously, and at the same time record the distance moved along the Z-axis. After the current point acquisition is completed, move the source excitation module and the geophone receiving module along the Z-axis in the reverse direction of the recorded Z-axis movement distance to the initial plane and height position, and then move to the plane position of the next point and continue to execute the above steps until the data acquisition of all measurement points in the observation system is completed.

7. An adaptive precise coupling method applicable to solid seismic physical simulation according to claim 6, characterized in that, In the mode of obtaining the optimal coupling pressure value: When the coupling pressure value of one of the source excitation module or the geophone receiving module is greater than zero, the coordinate axis of the module corresponding to the value greater than zero pauses movement. When the coupling pressure value of the other module is greater than zero, the corresponding coordinate axis of the other module also pauses movement; When the pressure values of both pressure measurement modules are non-zero or reach the optimal coupling force, trigger the source excitation module and the geophone receiving module to work simultaneously. And when it is determined that the geophone receiving module cannot receive the signal of the source excitation module, under the preset number of movement times, loop to execute the step movement operation, the synchronous measurement operation, and the coupling judgment operation until the geophone receiving module can receive the signal of the source excitation module; Among them, the step movement operation is the operation of the source excitation module and the geophone receiving module moving towards the model surface; The synchronous measurement operation is the operation of triggering the source excitation module and the geophone receiving module to work simultaneously; The coupling judgment operation is the operation of judging whether the geophone receiving module can receive the signal of the source excitation module.

8. An adaptive precise coupling method applicable to solid seismic physical simulation according to claim 6, characterized in that Record the Z-axis movement distance of the source excitation module and the geophone receiving module corresponding to the optimal coupling force pair in the three-dimensional coordinate system.

9. An adaptive precise coupling method applicable to solid seismic physical simulation according to claim 8, characterized in that In the precise coupling acquisition mode, move the source excitation module and the detector receiving module to a predetermined plane and height position, and then move the source excitation module and the detector receiving module along the Z-axis towards the model surface. When the coupling force between the source excitation module and the detector receiving module and the model surface reaches the optimal coupling force, synchronously trigger the source excitation module and the detector receiving module to work, and at the same time record the distance of the Z-axis movement. After the acquisition of the current point is completed, move the source excitation module and the detector receiving module along the Z-axis in the reverse direction according to the recorded Z-axis movement distance to the initial plane and height position, and then move to the plane position of the next point and continue to execute the above steps until the data acquisition of all measurement points in the observation system is completed.

Images