CN105785435B - Seismic physical model experimental system and its analog data acquisition method and apparatus - Google Patents

Abstract

The invention provides an earthquake physics model experiment system and its simulation data acquisition method and device, and relates to the technical field of earthquake physics model acquisition. The system includes: an earthquake physical model, an analog acquisition control system, an exciting transducer, a receiving transducer, and a liquid tank device. The bottom surface of the seismic physical model is a plane, and it is placed in a liquid tank device filled with liquid; the liquid tank The liquid plane in the device is higher than the seismic physical model; the excitation transducer and the receiving transducer are in full contact with the liquid plane, and the contact plane is at the same height as the liquid plane; both the excitation transducer and the receiving transducer are connected to the analog acquisition control system connect. The present invention can solve the problem of ultrasonic energy attenuation in the current traditional earthquake physics simulation experiment, which is not enough to detect the internal conditions of the earthquake physics model, and the signal-to-noise ratio of the collected data is low, and the experimental process requires a lot of manual intervention, and the data acquisition time of the earthquake physics model is long. long and low collection efficiency.

Description

Earthquake physics model experiment system and its simulation data acquisition method and device

technical field

The invention relates to the technical field of earthquake physics model acquisition, in particular to an earthquake physics model experiment system and a simulation data acquisition method and device thereof.

Background technique

At present, with the development of oil and gas exploration technology, the key target areas of oil and gas exploration and development in my country at the present stage almost all involve undulating surface terrain, such as Qaidam Basin, Sichuan Basin and Tarim Basin. In the undulating surface area, due to the large elevation change of the terrain, the signal-to-noise ratio of the seismic data collected by field seismic exploration is low and the wave field is complex, which increases the period and difficulty of later seismic data processing and interpretation. The difficulty of regional oil and gas exploration.

Seismic physical simulation through seismic physical model is an effective means of mutual verification of theory and practice in seismic exploration technology. It is useful for studying the propagation law of seismic wave field in undulating surface areas and solving complex surface seismic exploration technology problems that urgently need to be studied in oil and gas exploration. etc. are of great significance. The current traditional way of carrying out earthquake physics simulation experiments through earthquake physics models is shown in Figure 1. The excitation transducer 101 and the receiving transducer 102 are placed on a certain point on the surface of the earthquake physics model 103 by computer control, and then the excitation transducer is controlled to Transducer 101 emits ultrasonic waves (simulating the excitation of explosive source in the field seismic exploration), receives and records the ultrasonic waves reflected from the inside of the physical model through the receiving transducer 102 (simulating the field geophone receiving the seismic wave field reflected back from the interface of the underground formation), Therefore, the collection process similar to that in actual field exploration can be completed in the laboratory.

Both the excitation transducer 101 and the reception transducer 102 are currently in direct contact with the surface of the seismic physics model 103 . For the seismic physical model with undulating surface, the excitation transducer and the receiving transducer are coupled with the surface of the seismic physical model in a hard contact coupling mode, which may easily lead to poor contact between the excitation transducer and the receiving transducer and the surface of the seismic physical model. The ultrasonic energy is attenuated when it passes through the contact surface, and the ultrasonic energy is not enough to detect the internal conditions of the seismic physical model, and the signal-to-noise ratio of the collected data is low. In addition, due to the uneven surface of the seismic physical model, it is difficult to place the excitation transducer and the receiving transducer on the surface of the seismic physical model. The experimental process may require a lot of manual intervention, resulting in long data acquisition time and low acquisition efficiency of the seismic physical model.

Contents of the invention

Embodiments of the present invention provide an earthquake physics model experiment system and its simulation data acquisition method and device, to solve the problem that the ultrasonic energy attenuation in the current traditional earthquake physics simulation experiment is not enough to detect the internal conditions of the earthquake physics model, and the collected data The signal-to-noise ratio is low, and the experimental process requires a lot of manual intervention, the seismic physical model data acquisition time is long, and the acquisition efficiency is low.

To achieve the above object, the present invention adopts the following technical solutions:

An earthquake physics model experimental system, comprising: an earthquake physics model, an analog acquisition control system, an exciting transducer, a receiving transducer, and a liquid tank device, the bottom surface of the earthquake physics model is a plane, and the earthquake physics model is placed In the liquid tank device filled with liquid; the liquid level in the liquid tank device is higher than the seismic physics model; the excitation transducer and the receiving transducer are in full contact with the liquid plane, and contact The plane is at the same height as the liquid plane; both the exciting transducer and the receiving transducer are connected to the analog acquisition control system;

the excitation transducer is configured to transmit a first ultrasonic signal to the seismic physics model;

The receiving transducer is used to receive the second ultrasonic signal reflected by the seismic physics model;

The analog acquisition control system is used to control the ultrasonic transmitting end of the excitation transducer to be at the preset excitation point coordinates, and control the ultrasonic receiving end of the receiving transducer to be at the preset receiving point coordinates, and from the second Time information is collected from the ultrasonic signal to form a first discrete time sequence.

Specifically, the liquid in the liquid tank device is water at a preset constant temperature.

A simulation data acquisition method of an earthquake physics model experiment system, applied to the above-mentioned earthquake physics model experiment system, said method comprising:

Establish a plane Cartesian coordinate system in the horizontal direction;

receiving experimental coordinate information of an experiment, the experimental coordinate information including excitation point coordinates and receiving point coordinates on the liquid plane;

controlling the ultrasonic transmitting end of the excitation transducer to be at the coordinates of the excitation point, and controlling the ultrasonic receiving end of the receiving transducer to be at the coordinates of the receiving point;

controlling the excitation transducer to transmit a first ultrasonic signal to the seismic physics model;

controlling the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model;

collecting time information from the second ultrasonic signal with a preset sampling interval and number of sampling points to form a first discrete time sequence;

correcting the first discrete time series to generate a second discrete time series;

The earthquake physical model experiment simulation data is generated according to the second discrete time series of multiple experiments.

Further, the simulation data acquisition method of the earthquake physics model experiment system also includes:

determining the first elevation data of the surface of the physical earthquake model at the coordinates of the excitation point, and determining the second elevation data of the surface of the physical earthquake model at the coordinates of the receiving point;

Determine the third elevation data of the current liquid level.

Further, the simulation data acquisition method of the earthquake physics model experiment system also includes:

Determines the current propagation speed of the ultrasonic signal in the liquid of the liquid tank assembly.

In addition, the simulation data acquisition method of the earthquake physics model experiment system also includes:

According to the first elevation data, the third elevation data and the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device, determine the first wave caused by the liquid layer between the ultrasonic transmitting end of the current excitation transducer and the surface of the seismic physics model - ultrasonic travel time difference;

The first ultrasonic travel time difference is: Wherein, h ₀ is the third elevation data; v ₀ is the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device; (sx _i , sy _i ) is the excitation point coordinates of the current i-th experiment; is the first elevation data of the i-th experiment.

In addition, the simulation data acquisition method of the earthquake physics model experiment system also includes:

According to the second elevation data, the third elevation data and the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device, determine the first wave caused by the liquid layer between the ultrasonic receiving end of the current receiving transducer and the surface of the seismic physics model Two ultrasound travel time difference;

The second ultrasonic travel time difference is: Among them, (rx _i , ry _i ) is the receiving point coordinates of the current i-th experiment; is the second elevation data of the i-th experiment.

Specifically, correcting the first discrete time series to generate a second discrete time series, including:

A correction parameter is determined according to the first ultrasonic travel time difference, the second ultrasonic travel time difference and the sampling interval; the correction parameter is: Wherein, dt is described sampling interval; express The value of is rounded to an integer;

Generate the second discrete time series according to the first discrete time series and the correction parameters; the second discrete time series is:

Among them, s _i ′(j) is the discrete time value of the jth sampling point of the second discrete time series of the i-th experiment; s _i (j+k) is the first discrete time series of the i-th experiment Discrete time values of j+k sampling points; M is the number of sampling points.

An analog data acquisition device of an earthquake physics model experiment system, applied to the above earthquake physics model experiment system, said device comprising:

The coordinate system establishment unit is used to establish a plane Cartesian coordinate system in the horizontal direction;

The experimental coordinate information receiving unit is used to receive the experimental coordinate information of an experiment, and the experimental coordinate information includes the coordinates of the excitation point and the coordinates of the receiving point on the liquid plane;

The transducer position control unit is used to control the ultrasonic transmitting end of the exciting transducer to be at the excitation point coordinates, and control the ultrasonic receiving end of the receiving transducer to be at the receiving point coordinates;

An ultrasonic signal transmitting control unit, configured to control the excitation transducer to transmit a first ultrasonic signal to the seismic physical model;

The ultrasonic signal receiving control unit is used to control the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model;

A first discrete time series generating unit, configured to collect time information from the second ultrasonic signal with a preset sampling interval and number of sampling points to form a first discrete time series;

a correction unit, configured to correct the first discrete time series to generate a second discrete time series;

The earthquake physics model experiment simulation data generating unit is configured to generate the earthquake physics model experiment simulation data according to the second discrete time series of multiple experiments.

Further, the analog data acquisition device of the earthquake physics model experiment system also includes:

An elevation data determining unit, configured to determine the first elevation data of the surface of the seismic physics model at the coordinates of the excitation point, determine the second elevation data of the surface of the earthquake physics model at the coordinates of the receiving point, and determine the first elevation data of the current liquid level Three elevation data.

Further, the analog data acquisition device of the earthquake physics model experiment system also includes:

The propagation velocity determining unit is used for determining the propagation velocity of the current ultrasonic signal in the liquid of the liquid tank device.

Further, the analog data acquisition device of the earthquake physics model experiment system also includes:

The first ultrasonic travel time difference determination unit is used to determine the current ultrasonic transmitting end of the excitation transducer to the seismic physics according to the first elevation data, the third elevation data and the propagation speed of the ultrasonic signal in the liquid of the liquid tank device The first ultrasonic travel time difference caused by the liquid layer between the model surfaces;

The first ultrasonic travel time difference is: Wherein, h ₀ is the third elevation data; v ₀ is the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device; (sx _i , sy _i ) is the excitation point coordinates of the current i-th experiment; is the first elevation data of the i-th experiment.

Further, the analog data acquisition device of the earthquake physics model experiment system also includes:

The second ultrasonic travel time difference determining unit is used to determine the current ultrasonic receiving end of the receiving transducer to the seismic physics The second ultrasonic travel time difference caused by the liquid layer between the model surfaces;

The second ultrasonic travel time difference is: Among them, (rx _i , ry _i ) is the receiving point coordinates of the current i-th experiment; is the second elevation data of the i-th experiment.

In addition, the calibration unit includes:

A correction parameter determination module, configured to determine a correction parameter according to the first ultrasonic travel time difference, the second ultrasonic travel time difference and the sampling interval; the correction parameter is: Wherein, dt is described sampling interval; express The value of is rounded to an integer;

The second discrete time series generation module is used to generate the second discrete time series according to the first discrete time series and the correction parameters; the second discrete time series is:

Among them, s _i ′(j) is the discrete time value of the jth sampling point of the second discrete time series of the i-th experiment; s _i (j+k) is the first discrete time series of the i-th experiment Discrete time values of j+k sampling points; M is the number of sampling points.

The embodiment of the present invention provides an earthquake physics model experiment system and its simulation data acquisition method and device. The liquid layer is separated from the seismic physics model. In this way, the simulated data of the earthquake physics model experiment finally formed by the earthquake physics model experiment system has a high signal-to-noise ratio and relatively accurate results. In the analog data acquisition method of the earthquake physics model experiment system, the excitation transducer is used to transmit the first ultrasonic signal to the earthquake physics model, and the receiving transducer is controlled to receive the second ultrasonic signal reflected by the earthquake physics model; according to the second The time information collected by the ultrasonic signal forms a first discrete time series; furthermore, the first discrete time series needs to be corrected to overcome the influence of the liquid layer on ultrasonic propagation, and generate a second discrete time series; then according to the first discrete time series of multiple experiments Two discrete time series can generate the experimental simulation data of the earthquake physical model. It can be seen that the present invention can avoid the attenuation of the ultrasonic energy in the current traditional earthquake physics simulation experiment due to the poor contact of the hard contact mode, which is not enough to detect the internal situation of the earthquake physics model, and the signal-to-noise ratio of the collected data is low, and the experimental process requires A large number of manual interventions, long data acquisition time for seismic physical models, and low acquisition efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of the deployment of a traditional earthquake physics simulation experiment using an earthquake physics model in the prior art;

Fig. 2 is the structural representation of a kind of earthquake physics model experiment system provided by the embodiment of the present invention;

Fig. 3 is the flow chart one of the simulation data acquisition method of a kind of earthquake physics model experiment system provided by the embodiment of the present invention;

Fig. 4 is the flow chart two of the simulation data acquisition method of a kind of earthquake physics model experiment system provided by the embodiment of the present invention;

Fig. 5 is the schematic diagram of the experimental result data of earthquake physics model in the embodiment of the present invention and the experimental result data of prior art;

Fig. 6 is a structural schematic diagram 1 of an analog data acquisition device of an earthquake physics model experiment system provided by an embodiment of the present invention;

Fig. 7 is a second structural schematic diagram of an analog data acquisition device of an earthquake physics model experiment system provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 2 , an embodiment of the present invention provides an earthquake physics model experiment system 20 , including: an earthquake physics model 201 , a simulation acquisition control system 202 , an exciting transducer 203 , a receiving transducer 204 , and a liquid tank device 205 . The bottom surface of the earthquake physics model 201 is a plane, and the earthquake physics model 201 is placed in a liquid tank device 205 filled with liquid 206 and placed on a horizontal plane; the liquid level in the liquid tank device 205 is higher than the earthquake physics model 201; The exciting transducer 203 and the receiving transducer 204 are in full contact with the liquid plane, and the contact plane is at the same height as the liquid plane; both the exciting transducer 203 and the receiving transducer 204 are connected to the analog acquisition control system 202 .

The excitation transducer 203 can transmit the first ultrasonic signal to the seismic physics model 201 .

The receiving transducer 204 can receive the second ultrasonic signal reflected by the seismic physics model 201 .

The analog acquisition control system 202 can control the ultrasonic transmitting end of the excitation transducer 203 to be at the preset excitation point coordinates, and control the ultrasonic receiving end of the receiving transducer 204 to be at the preset receiving point coordinates, and from the second Time information is collected from the ultrasonic signal to form a first discrete time sequence.

Here, the exciting transducer 203 and the receiving transducer 204 are in full contact with the liquid plane, and the contact plane is at the same height as the liquid plane, in order to ensure that both the exciting transducer 203 and the receiving transducer 204 can be well coupled with the liquid plane , and does not invade the liquid plane, which is conducive to the accuracy of elevation data.

The earthquake physical model 201 involved in the embodiment of the present invention can refer to the actual geological body structure in the field and the surface relief elevation data obtained by actual measurement, which is in a certain ratio to the actual address body structure, such as 1:5000 or 1:10000, etc. But it's not limited to that.

It should be noted that the liquid 206 in the liquid tank device 205 can be water at a preset constant temperature. The preset constant temperature is greater than 0° C. to ensure that the water does not freeze. In addition, the liquid 206 can also use other liquids with lower viscosity, which will not be repeated here.

An embodiment of the present invention provides an experimental system for an earthquake physics model, wherein the applied excitation transducer and receiving transducer are not in hard contact with the earthquake physics model, but are in contact with the earthquake physics model through a liquid layer in the middle. Model interval. In this way, the simulated data of the earthquake physics model experiment finally formed by the earthquake physics model experiment system has a high signal-to-noise ratio and relatively accurate results. To avoid the attenuation of ultrasonic energy in the current traditional earthquake physics simulation experiment due to poor contact in the hard contact method, it is not enough to detect the internal conditions of the earthquake physics model, and the signal-to-noise ratio of the collected data is low, and the experimental process requires a lot of manual intervention. The collection time of physical model data is long and the collection efficiency is low.

In addition, as shown in FIG. 3, an embodiment of the present invention provides a simulated data acquisition method for an earthquake physics model experiment system, which is applied to the earthquake physics model experiment system shown in FIG. 2 above. The method includes:

Step 301, establishing a plane Cartesian coordinate system in the horizontal direction.

Step 302: Receive experimental coordinate information of an experiment, where the experimental coordinate information includes the coordinates of the excitation point and the coordinates of the receiving point on the liquid plane.

Step 303 , controlling the ultrasonic transmitting end of the exciting transducer to be at the excitation point coordinates, and controlling the ultrasonic receiving end of the receiving transducer to be at the receiving point coordinates.

Step 304, controlling the excitation transducer to transmit the first ultrasonic signal to the seismic physical model.

Step 305: Control the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model.

Step 306: Collect time information from the second ultrasonic signal with a preset sampling interval and number of sampling points to form a first discrete time sequence.

Step 307. Correct the first discrete time series to generate a second discrete time series.

Step 308 , generating earthquake physical model experimental simulation data according to the second discrete time series of multiple experiments.

The embodiment of the present invention provides a simulated data acquisition method for an earthquake physics model experiment system. The applied excitation transducer and receiving transducer are not in hard contact with the earthquake physics model, but through a liquid layer set in the middle to be spaced from the earthquake physics model. In this way, by controlling the excitation transducer to transmit the first ultrasonic signal to the seismic physical model, and controlling the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model; the first discrete time series is formed according to the time information collected by the second ultrasonic signal ; and furthermore, the first discrete time series needs to be corrected to overcome the influence of the liquid layer on ultrasonic propagation, and generate a second discrete time series; then, the earthquake physical model experimental simulation can be generated according to the second discrete time series of multiple experiments data. It can be seen that the present invention can avoid the attenuation of the ultrasonic energy in the current traditional earthquake physics simulation experiment due to the poor contact of the hard contact mode, which is not enough to detect the internal situation of the earthquake physics model, and the signal-to-noise ratio of the collected data is low, and the experimental process requires A large number of manual interventions, long data acquisition time for seismic physical models, and low acquisition efficiency.

In order to enable those skilled in the art to better understand the present invention, a more detailed embodiment is enumerated below, as shown in Figure 4, the embodiment of the present invention provides a kind of simulation data collection method of earthquake physics model experiment system, is applied to The earthquake physics model experiment system shown in above-mentioned Fig. 2, this method comprises:

Step 401, establishing a plane Cartesian coordinate system in the horizontal direction.

The origin of the plane Cartesian coordinate system here can be arbitrarily selected in the liquid tank device.

Step 402: Receive experimental coordinate information of an experiment, where the experimental coordinate information includes the coordinates of the excitation point and the coordinates of the receiving point on the liquid plane.

Specifically, every time an experiment is performed, it is necessary to obtain the experimental coordinate information once, so that the positions of the exciting transducer and the receiving transducer can be controlled subsequently by using the experimental coordinate information.

Step 403: Determine the first elevation data of the surface of the seismic physics model at the coordinates of the excitation point, determine the second elevation data of the surface of the seismic physics model at the coordinates of the receiving point, and determine the third elevation data of the current liquid level.

Step 404. Determine the propagation velocity of the current ultrasonic signal in the liquid in the liquid tank device.

Step 405, according to the first elevation data, the third elevation data and the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device, determine the current wave caused by the liquid layer between the ultrasonic transmitting end of the excitation transducer and the surface of the seismic physics model First ultrasound travel time difference.

Here, the first ultrasonic travel time difference is: Among them, h ₀ is the third elevation data; v ₀ is the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device; (sx _i , sy _i ) is the excitation point coordinates of the current i-th experiment; is the first elevation data of the i-th experiment.

Step 406, according to the second elevation data, the third elevation data and the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device, determine the current wave caused by the liquid layer between the ultrasonic receiving end of the receiving transducer and the surface of the seismic physics model Second ultrasound travel time difference.

Here, the second ultrasonic travel time difference is: Among them, (rx _i , ry _i ) is the receiving point coordinates of the current i-th experiment; is the second elevation data of the i-th experiment.

Step 407 , controlling the ultrasonic transmitting end of the exciting transducer to be at the excitation point coordinates, and controlling the ultrasonic receiving end of the receiving transducer to be at the receiving point coordinates.

Step 408, controlling the excitation transducer to transmit the first ultrasonic signal to the seismic physical model.

Step 409, controlling the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model.

Step 410: Collect time information from the second ultrasonic signal with a preset sampling interval and number of sampling points to form a first discrete time series.

The first discrete time series here can be expressed as: {S _i (j),j=1,2,...,M; i=1,2,...,N}; where i represents the i-th is the number of experiments, j represents the jth sampling, M is the number of sampling points mentioned above, and N is the total number of experiments.

Step 411. Determine a correction parameter according to the first ultrasonic travel time difference, the second ultrasonic travel time difference and the sampling interval.

Among them, the correction parameters are: Among them, dt is the sampling interval; express The value of is rounded to an integer.

Step 412: Generate a second discrete time series according to the first discrete time series and the correction parameters.

Wherein, the second discrete time series is:

Among them, s _i ′(j) is the discrete time value of the jth sampling point of the second discrete time series of the i-th experiment; s _i (j+k) is the first discrete time series of the i-th experiment Discrete time values of j+k sampling points; M is the number of sampling points.

After step 412, return to step 402 for the next experiment, and if the number of experiments meets the preset number threshold, continue to execute step 413.

Step 413 , generating earthquake physical model experimental simulation data according to the second discrete time series of multiple experiments.

In order to illustrate the effect of the simulation data acquisition method of a kind of earthquake physics model experiment system that the embodiment of the present invention provides, can refer to as shown in Fig. 5, wherein the part (a) of Fig. 5 is the traditional earthquake physics simulation experiment in the prior art The data schematic diagram that is gathered; The (b) part of Fig. 5 is the data schematic diagram that adopts the simulated data acquisition method of the earthquake physics model experiment system that the embodiment of the present invention provides; The (c) part of Fig. 5 is that adopts the embodiment of the present invention The simulation data acquisition method of the earthquake physics model experiment system is provided, but the liquid layer influence correction process is not performed, and the final data schematic diagram is obtained. In Fig. 5, the ordinate is time, and the abscissa is the seismic data track number. Comparing the seismic wavefields at the same positions indicated by the oval box 51 and the rectangular box 52 in Fig. 5, it can be seen that the seismic reflection signal corresponding to the internal structure of the seismic physical model can be obtained by the method provided by the present invention. Comparing the information in the oval frame 51 in Fig. 5 shows that the seismic signal continuity in the seismic record obtained in part (b) of Fig. 5 is stronger; and by comparing the information in the rectangular frame 52 in Fig. 5, it can be seen that The vertical resolution of seismic records obtained in part (b) of 5 is stronger. The arrows in Fig. 5 have pointed out the different seismic information obtained by the two acquisition methods of part (a) and part (b) of Fig. 5, wherein, arrow 53 in Fig. 5 has pointed out the difference in the seismic records obtained by traditional analog acquisition Direct wave interference. The second arrow 54 in Fig. 5 points out the multiple waves generated by the existence of the water layer in the seismic records obtained by the simulated acquisition of the present invention, which should be paid attention to when analyzing the data. The position indicated by the third arrow 55 in Fig. 5 is the seismic wave field signal without post-correction processing. It can be seen that the seismic wave field signal without post-correction processing shifts with the track number.

The embodiment of the present invention provides a simulated data acquisition method for an earthquake physics model experiment system. The applied excitation transducer and receiving transducer are not in hard contact with the earthquake physics model, but through a liquid layer set in the middle to be spaced from the earthquake physics model. In this way, by controlling the excitation transducer to transmit the first ultrasonic signal to the seismic physical model, and controlling the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model; the first discrete time series is formed according to the time information collected by the second ultrasonic signal ; and furthermore, the first discrete time series needs to be corrected to overcome the influence of the liquid layer on ultrasonic propagation, and generate a second discrete time series; then, the earthquake physical model experimental simulation can be generated according to the second discrete time series of multiple experiments data. It can be seen that the present invention can avoid the attenuation of the ultrasonic energy in the current traditional earthquake physics simulation experiment due to the poor contact of the hard contact mode, which is not enough to detect the internal situation of the earthquake physics model, and the signal-to-noise ratio of the collected data is low, and the experimental process requires A large number of manual interventions, long data collection time for seismic physical models, and low collection efficiency.

Corresponding to the above method embodiments shown in Fig. 3 and Fig. 4, as shown in Fig. 6, an embodiment of the present invention provides an analog data acquisition device for an earthquake physics model experiment system, which is applied to the above earthquake physics model experiment system, the Devices include:

The coordinate system establishing unit 61 is configured to establish a plane Cartesian coordinate system in the horizontal direction.

The experimental coordinate information receiving unit 62 is configured to receive the experimental coordinate information of an experiment, the experimental coordinate information includes the excitation point coordinates and the receiving point coordinates on the liquid plane.

The transducer position control unit 63 is used to control the ultrasonic transmitting end of the exciting transducer to be at the excitation point coordinates, and control the ultrasonic receiving end of the receiving transducer to be at the receiving point coordinates.

The ultrasonic signal transmission control unit 64 is configured to control the excitation transducer to transmit the first ultrasonic signal to the seismic physical model.

The ultrasonic signal receiving control unit 65 is configured to control the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model.

The first discrete time sequence generating unit 66 is configured to collect time information from the second ultrasonic signal at a preset sampling interval and number of sampling points to form a first discrete time sequence.

A correction unit 67, configured to correct the first discrete time series to generate a second discrete time series.

The earthquake physics model experiment simulation data generation unit 68 is configured to generate the earthquake physics model experiment simulation data according to the second discrete time series of multiple experiments.

Further, as shown in Figure 7, the analog data acquisition device of the earthquake physics model experiment system may also include:

The elevation data determination unit 69 can determine the first elevation data of the surface of the seismic physical model at the coordinates of the excitation point, the second elevation data of the surface of the seismic physical model at the coordinates of the receiving point, and the third elevation data of the current liquid level.

Further, as shown in Figure 7, the analog data acquisition device of the earthquake physics model experiment system may also include:

The propagation velocity determining unit 70 can determine the propagation velocity of the current ultrasonic signal in the liquid of the liquid tank device.

Further, as shown in Figure 7, the analog data acquisition device of the earthquake physics model experiment system also includes:

The first ultrasonic travel time difference determination unit 71 can determine the current ultrasonic transmitting end of the excitation transducer to the surface of the seismic physics model according to the first elevation data, the third elevation data and the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device The difference in travel time of the first ultrasonic wave is caused by the liquid layer between.

The first ultrasonic travel time difference is: Among them, h ₀ is the third elevation data; v ₀ is the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device; (sx _i , sy _i ) is the excitation point coordinates of the current i-th experiment; is the first elevation data of the i-th experiment.

The second ultrasonic travel time difference determination unit 72 can determine the current ultrasonic receiving end of the receiving transducer to the surface of the seismic physics model according to the second elevation data, the third elevation data and the propagation velocity of the ultrasonic signal in the liquid of the liquid tank device The second ultrasonic travel time difference is caused by the liquid layer in between.

The second ultrasonic travel time difference is: Among them, (rx _i , ry _i ) is the receiving point coordinates of the current i-th experiment; is the second elevation data of the i-th experiment.

In addition, as shown in FIG. 7, the correction unit 67 may include:

The correction parameter determination module 671 is used to determine a correction parameter according to the first ultrasonic travel time difference, the second ultrasonic travel time difference and the sampling interval; the correction parameter is: Among them, dt is the sampling interval; express The value of is rounded to an integer.

The second discrete time series generation module 672 is used to generate a second discrete time series according to the first discrete time series and correction parameters; the second discrete time series is:

Among them, s _i ′(j) is the discrete time value of the jth sampling point of the second discrete time series of the i-th experiment; s _i (j+k) is the first discrete time series of the i-th experiment Discrete time values of j+k sampling points; M is the number of sampling points.

It is worth noting that, for the specific implementation manner of the analog data acquisition device of the earthquake physics model experiment system provided by the embodiment of the present invention, reference may be made to the above-mentioned method embodiment, which will not be repeated here.

The embodiment of the present invention provides an analog data acquisition device for an earthquake physics model experiment system. The applied excitation transducer and receiving transducer are not in hard contact with the earthquake physics model, but through a liquid layer arranged in the middle to be spaced from the earthquake physics model. In this way, by controlling the excitation transducer to transmit the first ultrasonic signal to the seismic physical model, and controlling the receiving transducer to receive the second ultrasonic signal reflected by the seismic physical model; the first discrete time series is formed according to the time information collected by the second ultrasonic signal ; and furthermore, the first discrete time series needs to be corrected to overcome the influence of the liquid layer on ultrasonic propagation, and generate a second discrete time series; then, the earthquake physical model experimental simulation can be generated according to the second discrete time series of multiple experiments data. It can be seen that the present invention can avoid the attenuation of the ultrasonic energy in the current traditional earthquake physics simulation experiment due to the poor contact of the hard contact mode, which is not enough to detect the internal situation of the earthquake physics model, and the signal-to-noise ratio of the collected data is low, and the experimental process requires A large number of manual interventions, long data acquisition time for seismic physical models, and low acquisition efficiency.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

In the present invention, specific examples have been applied to explain the principles and implementation methods of the present invention, and the descriptions of the above examples are only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to this The idea of the invention will have changes in the specific implementation and scope of application. To sum up, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. a kind of analog data acquisition method of seismic physical model experimental system, which is characterized in that be applied to a kind of earthquake object Model experimental systems are managed, including：Seismic physical model, excitation energy converter, receives energy converter and liquid at analog acquisition control system The bottom surface of slot device, the seismic physical model is plane, and the seismic physical model is placed in the liquid filled with liquid In body slot device；Fluid level in the liquid slot device is higher than the seismic physical model；It the excitation energy converter and connects It receives energy converter to completely attach to the fluid level, and contact plane is identical as the fluid level height；The excitation transducing Device and reception energy converter are connect with the analog acquisition control system；

The excitation energy converter, for emitting the first ultrasonic signal to the seismic physical model；

The reception energy converter, the second ultrasonic signal for receiving the seismic physical model reflection；

The analog acquisition control system, the ultrasonic wave transmitting terminal for controlling excitation energy converter are in pre-set shot point Coordinate, and the ultrasonic wave receiving terminal for controlling and receiving energy converter is in pre-set reception point coordinates, and it is ultrasonic from described second Acquisition time information in wave signal forms the first discrete-time series；

Liquid in the liquid slot device is the water of a pre-set constant temperature；

The method includes：

Plane right-angle coordinate is established in the horizontal direction；

Receive the experiment coordinate information once tested, the experiment coordinate information include excitation point coordinates on fluid level and Receive point coordinates；

The ultrasonic wave transmitting terminal of control excitation energy converter is in the excitation point coordinates, and the ultrasonic wave for controlling and receiving energy converter connects Receiving end is in the reception point coordinates；

It controls the excitation energy converter and emits the first ultrasonic signal to seismic physical model；

Control and receive the second ultrasonic signal that energy converter receives seismic physical model reflection；

Acquisition time information, formation first from second ultrasonic signal with pre-set sampling interval and sampling number Discrete-time series；

First discrete-time series are corrected, the second discrete-time series are generated；

Seismic physical model experimental simulation data are generated according to second discrete-time series of many experiments；

First discrete-time series are corrected, the second discrete-time series are generated, including：

According to the first ultrasonic wave hourage is poor, the second ultrasonic wave hourage difference and the sampling interval determine that a correction is joined Number；The correction parameter is：Wherein, dt is the sampling interval；It indicatesValue using rounding up mode round numbers；

According to first discrete-time series and the correction parameter, second discrete-time series are generated；Described second Discrete-time series are：

Wherein, s_i' (j) is the discrete time value of j-th of sampled point of the second discrete-time series of ith experiment；s_i(j+k) For the discrete time value of+k sampled points of jth of the first discrete-time series of ith experiment；M is the sampling number.

2. the analog data acquisition method of seismic physical model experimental system according to claim 1, which is characterized in that also Including：

It determines first altitude data on the seismic physical model surface at the excitation point coordinates, and determines the reception point coordinates Second altitude data on the seismic physical model surface at place；

Determine the third altitude data of current liquid plane.

3. the analog data acquisition method of seismic physical model experimental system according to claim 2, which is characterized in that also Including：

Determine spread speed of the current ultrasonic signal in the liquid of liquid slot device.

4. the analog data acquisition method of seismic physical model experimental system according to claim 3, which is characterized in that also Including：

According to the propagation speed of first altitude data, third altitude data and ultrasonic signal in the liquid of liquid slot device Degree determines first caused by the ultrasonic wave transmitting terminal to the liquid level between seismic physical model surface of current excitation energy converter Ultrasonic wave hourage is poor；

The first ultrasonic wave hourage difference is：Wherein, h₀For the third altitude data；v₀ For spread speed of the ultrasonic signal in the liquid of liquid slot device；(sx_i,sy_i) it is that the shot point that current ith is tested is sat Mark；For the first altitude data of ith experiment.

5. the analog data acquisition method of seismic physical model experimental system according to claim 4, which is characterized in that also Including：

According to the propagation speed of second altitude data, third altitude data and ultrasonic signal in the liquid of liquid slot device Degree determines second caused by the ultrasonic wave receiving terminal to the liquid level between seismic physical model surface of current reception energy converter Ultrasonic wave hourage is poor；

The second ultrasonic wave hourage difference is：Wherein, (rx_i,ry_i) it is that current ith is real The reception point coordinates tested；For second altitude data of ith experiment.

6. a kind of analog data acquisition device of seismic physical model experimental system, which is characterized in that be applied to a kind of earthquake object Model experimental systems are managed, including：Seismic physical model, excitation energy converter, receives energy converter and liquid at analog acquisition control system The bottom surface of slot device, the seismic physical model is plane, and the seismic physical model is placed in the liquid filled with liquid In body slot device；Fluid level in the liquid slot device is higher than the seismic physical model；It the excitation energy converter and connects It receives energy converter to completely attach to the fluid level, and contact plane is identical as the fluid level height；The excitation transducing Device and reception energy converter are connect with the analog acquisition control system；

The excitation energy converter, for emitting the first ultrasonic signal to the seismic physical model；

The reception energy converter, the second ultrasonic signal for receiving the seismic physical model reflection；

The analog acquisition control system, the ultrasonic wave transmitting terminal for controlling excitation energy converter are in pre-set shot point Coordinate, and the ultrasonic wave receiving terminal for controlling and receiving energy converter is in pre-set reception point coordinates, and it is ultrasonic from described second Acquisition time information in wave signal forms the first discrete-time series；

Liquid in the liquid slot device is the water of a pre-set constant temperature；

Described device includes：

Establishment of coordinate system unit, for establishing plane right-angle coordinate in the horizontal direction；

Coordinate information receiving unit is tested, for receiving the experiment coordinate information once tested, the experiment coordinate information includes Excitation point coordinates on fluid level and reception point coordinates；

Transducer position control unit, the ultrasonic wave transmitting terminal for controlling excitation energy converter are in the excitation point coordinates, and The ultrasonic wave receiving terminal for controlling and receiving energy converter is in the reception point coordinates；

Ultrasonic signal emission controlling unit emits the first ultrasonic wave for controlling the excitation energy converter to seismic physical model Signal；

Ultrasound signal receipt control unit receives the second ultrasonic wave of seismic physical model reflection for controlling and receiving energy converter Signal；

First discrete-time series generation unit, for pre-set sampling interval and sampling number from second ultrasound Acquisition time information in wave signal forms the first discrete-time series；

Unit is corrected, for being corrected to first discrete-time series, generates the second discrete-time series；

Seismic physical model experimental simulation data generating unit, for being given birth to according to second discrete-time series of many experiments At seismic physical model experimental simulation data；

The correction unit, including：

Correction parameter determining module, for according to the first ultrasonic wave hourage is poor, the second ultrasonic wave hourage is poor and described Sampling interval determines a correction parameter；The correction parameter is：Wherein, dt is between the sampling Every；It indicatesValue using rounding up mode round numbers；

Second discrete-time series generation module, for according to first discrete-time series and the correction parameter, generating Second discrete-time series；Second discrete-time series are：

Wherein, s_i' (j) is the discrete time value of j-th of sampled point of the second discrete-time series of ith experiment；s_i(j+k) For the discrete time value of+k sampled points of jth of the first discrete-time series of ith experiment；M is the sampling number.

7. the analog data acquisition device of seismic physical model experimental system according to claim 6, which is characterized in that also Including：

Altitude data determination unit, the first high number of passes for determining the seismic physical model surface at the excitation point coordinates According to determining second altitude data on the seismic physical model surface at the reception point coordinates, and determine current liquid plane Third altitude data.

8. the analog data acquisition device of seismic physical model experimental system according to claim 7, which is characterized in that also Including：

Spread speed determination unit, for determining spread speed of the current ultrasonic signal in the liquid of liquid slot device.

9. the analog data acquisition device of seismic physical model experimental system according to claim 8, which is characterized in that also Including：

First ultrasonic wave hourage difference determination unit, for according to first altitude data, third altitude data and ultrasound Spread speed of the wave signal in the liquid of liquid slot device determines the ultrasonic wave transmitting terminal of current excitation energy converter to earthquake First ultrasonic wave hourage caused by liquid level between physical model surface is poor；

The first ultrasonic wave hourage difference is：Wherein, h₀For the third altitude data；v₀ For spread speed of the ultrasonic signal in the liquid of liquid slot device；(sx_i,sy_i) it is that the shot point that current ith is tested is sat Mark；For the first altitude data of ith experiment.

10. the analog data acquisition device of seismic physical model experimental system according to claim 9, which is characterized in that Further include：

Second ultrasonic wave hourage difference determination unit, for according to second altitude data, third altitude data and ultrasound Spread speed of the wave signal in the liquid of liquid slot device determines the current ultrasonic wave receiving terminal for receiving energy converter to earthquake Second ultrasonic wave hourage caused by liquid level between physical model surface is poor；

The second ultrasonic wave hourage difference is：Wherein, (rx_i,ry_i) it is that current ith is real The reception point coordinates tested；For second altitude data of ith experiment.