Indoor channel signal combination method, device, equipment, medium and product

Abstract

The embodiment of the present invention provides a method, device, equipment, medium and product for combining indoor channel signals. The method includes: obtaining the shot offset corresponding to each channel in the target shot set, the stacking velocity of the target shot point and a plurality of channel signal data to be combined; for each channel to be combined, determining the channel to be combined as the target center channel, determining a plurality of channels adjacent to the target center channel as the target stacking channel, determining the corresponding target time difference between the target center channel and each target stacking channel according to the shot offset and the stacking velocity of each target stacking channel, combining the signal data of the target center channel and the signal data of the plurality of target stacking channels according to the target time difference, and generating target combined channel signal data; processing the target combined channel signal data corresponding to each channel to be combined to generate indoor channel combined signal data. The method of the embodiment of the present invention can improve the signal-to-noise ratio of the indoor channel combined signal data finally generated.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of seismic exploration technology, and in particular to an indoor channel signal combination method, device, equipment, medium and product. Background Art

[0002] In reflection wave seismic exploration, the reflection of the target layer mainly propagates to the surface in an approximately vertical direction, and surface waves, scattering, linear waves, secondary source interference, etc. are mostly propagated along the surface or at a small angle to the surface. Different propagation directions lead to differences in energy and time when the sub-waves reach the detector. On the one hand, the seismic waves propagating at a small angle along the surface have a short travel distance and small energy attenuation, which is manifested as strong noise energy on a single shot record; on the other hand, the apparent velocity propagating along the surface is closer to the true velocity of the surface, and the time difference reaching adjacent detectors is also large, which is manifested as a large time difference between the strong noise energy on the single shot record and the adjacent channels. However, because the reflected wave propagates a longer distance and has a larger apparent velocity, the energy in the seismic record is weaker and the adjacent time difference is smaller. When the surface is a strong absorption medium, the reflected wave energy is further weakened, and the signal-to-noise ratio of the seismic record is extremely low.

[0003] The detector combination superimposes the signals received in a small part of the space to suppress noise and highlight effective reflections. It is widely used in field acquisition construction. The effect of the combination superposition depends on the time difference between the effective signal and noise in the adjacent data of the combination. The smaller the time difference, the better the phase, the more obvious the superposition enhancement effect, and vice versa. The greater the degree of suppression. Indoor combination is a data processing method that further combines the data in the later stage to suppress noise and improve the signal-to-noise ratio of the data based on the single detection reception without combination in the field or the data that has been combined and received in the field. Compared with the field combination, the noise time difference will be larger due to the larger internal distance of the group, and the noise suppression effect will be more obvious, but the low-pass effect of the effective signal caused by the increase in the time difference will also be more obvious, and the signal-to-noise ratio of the seismic record will be lower.

[0004] Therefore, the current indoor combination method causes greater damage to the effective signal during combination due to the large time difference of the effective signal, resulting in a low signal-to-noise ratio in the seismic record. Summary of the invention

[0005] The present invention provides an indoor channel signal combination method, device, equipment, medium and product to solve the problem that the current indoor combination method causes large damage to the effective signal during combination due to the large time difference of the effective signal, thereby resulting in a low signal-to-noise ratio of the seismic record.

[0006] A first aspect of an embodiment of the present invention provides an indoor channel signal combination method, comprising:

[0007] Obtain the corresponding offset of each channel in the target shot set, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined;

[0008] For each track to be combined, the track to be combined is determined as a target center track, a plurality of tracks adjacent to the target center track are determined as target stacking tracks, a target time difference corresponding to the target center track and each target stacking track is determined according to the offset and the stacking velocity of each target stacking track, and signal data of the target center track and signal data of the plurality of target stacking tracks are combined according to the target time difference to generate signal data of the target combined track;

[0009] The target combined channel signal data corresponding to each channel to be combined is processed to generate indoor channel combined signal data.

[0010] Furthermore, in the method as described above, the step of determining the corresponding target time difference between the target center track and each target stacking track according to the offset of each target stacking track and the stacking velocity comprises:

[0011] Determine the time relationship between the target center track and each target stacking track according to the offset of each target stacking track and the corresponding stacking velocity;

[0012] The target time difference is determined according to the time relationship.

[0013] Furthermore, in the above method, the determining the time relationship between the target center track and each target stacking track according to the offset of each target stacking track and the corresponding stacking velocity comprises:

[0014] The time relationship between the target center track and each target stacking track is determined by a preset time difference algorithm according to the offset of each target stacking track and the stacking speed; wherein the time difference algorithm is:

[0015]

[0016] Among them, T i，j is the signal receiving time corresponding to the target superposition channel, T0 is the signal receiving time corresponding to the target center channel, SRD i，j is the offset corresponding to the target stacking trace, and V is the stacking velocity.

[0017] Furthermore, in the above method, the step of combining the signal data of the target center channel and the signal data of multiple target superimposed channels according to the target time difference comprises:

[0018] Dividing the signal data of the target center channel into a plurality of time window signal data to be combined with a preset combination time window length, and arranging them according to a preset time window combination order;

[0019] For each time window signal data to be combined, determining the time window signal data to be combined as the central time window signal data;

[0020] Determine the superimposed time window signal data corresponding to each target superimposed channel according to the target time difference and the central time window signal data; wherein the combined time window length of the superimposed time window signal data is the same as the combined time window length of the central time window signal data;

[0021] The central time window signal data and the corresponding superimposed time window signal data are combined.

[0022] Furthermore, the method as described above, before combining the central time window signal data and the corresponding superimposed time window signal data, further includes:

[0023] Performing a cross-correlation operation on the central time window signal data and each superimposed time window signal data to determine final superimposed signal data corresponding to the maximum correlation between each superimposed time window signal data and the central time window signal data;

[0024] The combining of the central time window signal data and the corresponding superimposed time window signal data comprises:

[0025] Combine the central time window signal data and each final superimposed signal data.

[0026] Furthermore, the method as described above, after combining the central time window signal data and the corresponding superimposed time window signal data, further comprises:

[0027] Determine the final time difference between the target center track and each target superimposed track according to the combined time window position corresponding to the final superimposed signal data and the combined time window position corresponding to the central time window signal data;

[0028] The final time difference is determined as the target time difference.

[0029] A second aspect of an embodiment of the present invention provides an indoor channel signal combination device, comprising:

[0030] An acquisition module is used to acquire the shot offset corresponding to each channel in the target shot set, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined;

[0031] a target track combination generating module, for each track to be combined, determining the track to be combined as a target center track, determining a plurality of tracks adjacent to the target center track as target stacking tracks, determining a corresponding target time difference between the target center track and each target stacking track according to the offset and the stacking velocity of each target stacking track, combining signal data of the target center track with signal data of the plurality of target stacking tracks according to the target time difference, and generating target combination track signal data;

[0032] The indoor channel combination generation module is used to process the target combined channel signal data corresponding to each channel to be combined to generate indoor channel combined signal data.

[0033] Further, in the above-mentioned device, when determining the corresponding target time difference between the target center track and each target stacking track according to the offset of each target stacking track and the stacking velocity, the target track combination generation module is specifically used to:

[0034] The time relationship between the target center track and each target stacking track is determined according to the offset of each target stacking track and the corresponding stacking velocity; and the target time difference is determined according to the time relationship.

[0035] Further, in the above-mentioned device, when determining the time relationship between the target center track and each target stacking track according to the offset of each target stacking track and the corresponding stacking velocity, the target track combination generation module is specifically used to:

[0036] The time relationship between the target center track and each target stacking track is determined by a preset time difference algorithm according to the offset of each target stacking track and the stacking speed; wherein the time difference algorithm is:

[0037]

[0038] Among them, T i，j is the signal receiving time corresponding to the target superposition channel, T0 is the signal receiving time corresponding to the target center channel, SRD i，j is the offset corresponding to the target stacking trace, and V is the stacking velocity.

[0039] Furthermore, in the above-mentioned device, when the target track combination generation module combines the signal data of the target center track and the signal data of the plurality of target superimposed tracks according to the target time difference, it is specifically used to:

[0040] The signal data of the target center channel is divided into a plurality of time window signal data to be combined with preset combination time window lengths, and arranged according to a preset time window combination order; for each time window signal data to be combined, the time window signal data to be combined is determined as the center time window signal data; the superimposed time window signal data corresponding to each target superimposed channel is determined according to the target time difference and the center time window signal data; wherein the combined time window length of the superimposed time window signal data is the same as the combined time window length of the center time window signal data; and the center time window signal data and the corresponding superimposed time window signal data are combined.

[0041] Furthermore, in the above device, the target track combination generating module is also used for:

[0042] Performing a cross-correlation operation on the central time window signal data and each superimposed time window signal data to determine final superimposed signal data corresponding to the maximum correlation between each superimposed time window signal data and the central time window signal data;

[0043] The target track combination generation module is specifically used to combine the central time window signal data and the corresponding superimposed time window signal data:

[0044] Combine the central time window signal data and each final superimposed signal data.

[0045] Furthermore, the above device further comprises:

[0046] The target time difference determination module is used to determine the corresponding final time difference between the target central track and each target superimposed track according to the combined time window position corresponding to the final superimposed signal data and the combined time window position corresponding to the central time window signal data; and determine the final time difference as the target time difference.

[0047] A third aspect of an embodiment of the present invention provides an electronic device, including: a memory, a processor;

[0048] Memory; Memory for storing instructions executable by the processor;

[0049] The processor is configured to execute the indoor channel signal combination method as described in any one of the first aspects.

[0050] A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the indoor channel signal combination method described in any one of the first aspects.

[0051] A fifth aspect of the embodiments of the present invention provides a computer program product, including a computer program, which, when executed by a processor, implements the indoor channel signal combination method described in any one of the first aspects.

[0052] The embodiment of the present invention provides a method, device, equipment, medium and product for combining indoor channel signals. The method includes: obtaining the offset corresponding to each channel in the target shot set, the stacking velocity of the target shot point and the signal data of multiple channels to be combined; for each channel to be combined, determining the channel to be combined as the target center channel, and determining multiple channels adjacent to the target center channel as the target stacking channels, determining the target time difference corresponding to the target center channel and each target stacking channel according to the offset and the stacking velocity of each target stacking channel, combining the signal data of the target center channel and the signal data of multiple target stacking channels according to the target time difference to generate target combined channel signal data; processing the target combined channel signal data corresponding to each channel to be combined to generate indoor channel combined signal data. The indoor channel signal combination method of the embodiment of the present invention obtains the offset corresponding to each channel, the stacking velocity of the target shot point and the signal data of multiple channels to be combined, and for each channel to be combined, the channel to be combined is used as the target center channel and the multiple channels adjacent to the target stacking channel as the target stacking channel. The time difference between the target center channel and the target stacking channel is determined according to the offset and the stacking velocity corresponding to the target stacking channel. The time difference between the signal data corresponding to the target superimposed channel and the target center channel is adjusted accordingly by determining the time difference, so that when the target superimposed channel and the target center channel are combined, the time difference when the effective signal is combined is reduced, which can highlight the effective signal. At the same time, the effective signal characteristics can be protected to the greatest extent, thereby improving the signal-to-noise ratio of the final generated indoor channel combined signal data. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0054] Figure 1 A scene diagram for implementing the indoor channel signal combination method of an embodiment of the present invention;

[0055] Figure 2 A schematic diagram of a flow chart of an indoor channel signal combination method provided by a first embodiment of the present invention;

[0056] Figure 3 A schematic diagram of a flow chart of an indoor channel signal combination method provided in a second embodiment of the present invention;

[0057] Figure 4 A schematic diagram of seismic exploration in an indoor channel signal combination method provided by a third embodiment of the present invention;

[0058] Figure 5a A schematic diagram of seismic exploration signal recording of an indoor channel signal combination method provided by a third embodiment of the present invention;

[0059] Figure 5bA local enlarged diagram of the seismic exploration signal recording schematic diagram of the indoor channel signal combination method provided in the third embodiment of the present invention;

[0060] Figure 5c Another partially enlarged diagram of the schematic diagram of seismic exploration signal recording of the indoor channel signal combination method provided in the third embodiment of the present invention;

[0061] Figure 6a An enlarged view of the far offset of the indoor channel signal combination method provided by the third embodiment of the present invention;

[0062] Figure 6b An enlarged view of the far offset of the indoor channel signal combination method provided by the third embodiment of the present invention after combination;

[0063] Figure 7 This is a diagram showing the recording effect of the exploration signal after indoor channel combination in the indoor channel signal combination method provided in the third embodiment of the present invention;

[0064] Figure 8 A schematic diagram of the structure of an indoor channel signal combination device provided by a fourth embodiment of the present invention;

[0065] Fig. 9 A schematic structural diagram of an electronic device provided in a fifth embodiment of the present invention.

[0066] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0067] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0068] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0069] First of all, in order to more clearly understand the technical solution of the present application, the terms in the technical solution of the present application will be explained.

[0070] Shot point: refers to the location where the earthquake source is formed by explosion in seismic exploration.

[0071] Channel: refers to the data channel that changes with time and is received by a detector or a set of detectors. Adjacent channels are the data channels received by adjacent detectors (when a single detector receives data) or detector sets (when a field combination detector receives data).

[0072] Shot gather: A shot gather is a collection of data received by all detectors that are fired from the same shot.

[0073] Combined time window: refers to the concept of time with time and number of channels as the vertical axis and horizontal axis respectively. The data within the combined time window is a collection of data.

[0074] Shot offset: refers to the distance between the shot point and the detector.

[0075] In order to clearly understand the technical solution of the present application, the solution of the prior art is first introduced in detail. In reflection wave seismic exploration, the reflection of the target layer is mainly propagated to the surface in an approximately vertical direction, and surface waves, scattering, linear, secondary source interference, etc. are mostly propagated along the surface or at a small angle to the surface. Various noise components are superimposed on the effective signal waveform, thereby affecting the signal-to-noise ratio of the reflection wave in the seismic record.

[0076] In order to improve the signal-to-noise ratio of reflected waves in seismic records, the geophone combination superimposes the signals received in a small part of the space to suppress noise and highlight effective reflections. This method is widely used in field acquisition construction. The effect of the combination superposition depends on the time difference between the effective signal and noise in the adjacent data channels participating in the combination. The smaller the time difference, the better the phase coherence, the more obvious the superposition enhancement effect, and vice versa. In field construction, in order to ensure the phase coherence of effective reflections, the combination base distance (the distance between the two farthest geophones in the combination) and the size of the height difference within the group are limited during parameter design demonstration. In areas where the surface undulations change dramatically, the placement range of the geophones is often further compressed on this basis. After the range is compressed, the arrival time difference of the noise is also reduced synchronously, and the effect of improving the signal-to-noise ratio is greatly reduced. Indoor combination is a data processing method that further combines the data in the later stage to suppress noise and improve the signal-to-noise ratio of the data based on the single detection reception without combination in the field or the data that has been combined in the field. Compared with the field combination, the distance within the group is generally an integer multiple of the track spacing. Compared with the field combination, the spacing is larger, the noise time difference will also be larger, and the noise suppression effect will be more obvious, but the effective signal has a lower signal-to-noise ratio due to the increased time difference.

[0077] Therefore, in order to protect the effective signal, it is necessary to try to reduce the combined time difference when combining indoors. The combined time difference of effective reflection comes from two aspects. One is the receiving time difference caused by the surface undulation, which can be solved by static correction. The other is the propagation time difference caused by the spherical propagation of seismic waves.

[0078] Therefore, in view of the fact that the indoor combination method in the prior art has a large time difference of the effective signal, which leads to a large damage to the effective signal during combination, thus resulting in a low signal-to-noise ratio of the seismic record, the inventors have found in their research that in order to solve the problem that the current indoor combination method has a large time difference of the effective signal, the propagation time difference caused by the spherical propagation of seismic waves can be targeted to reduce the propagation time difference caused by the spherical propagation of seismic waves, thereby reducing the time difference of the effective signal. The spherical propagation of seismic waves is a fixed law when the seismic wave propagates signals. The inventors have found through research that there is a certain correlation between the time when the effective signal is received between each channel. Therefore, in the technical solution of the present application, the shot offset corresponding to each channel, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined are first obtained. For each channel to be combined, the channel to be combined is used as the target center channel, and the adjacent multiple channels are used as the target stacking channels. The time difference between the target center channel and the target stacking channel is determined according to the shot offset and stacking velocity corresponding to the target stacking channel. The time difference between the signal data corresponding to the target superimposed channel and the target center channel is adjusted accordingly by determining the time difference, so that when the target superimposed channel and the target center channel are combined, the time difference when the effective signal is combined is reduced, which can highlight the effective signal and thus improve the signal-to-noise ratio of the indoor channel combined signal data finally generated.

[0079] Based on the above creative findings, the inventor proposed the technical solution of the present application.

[0080] The following describes the application scenarios of the indoor channel signal combination method provided by the embodiment of the present invention. Figure 1As shown, 1 is a first electronic device, 2 is a second electronic device, and 3 is a third electronic device. The network architecture of the application scenario corresponding to the indoor channel signal combination method provided by the embodiment of the present invention includes: a first electronic device 1, a second electronic device 2 and a third electronic device 3. The second electronic device 2 stores relevant data of seismic exploration, such as the shot offset corresponding to each channel in the shot set, the stacking velocity of the shot point and the signal data of each channel. When indoor channel signal combination is required, first, the first electronic device 1 obtains the shot offset corresponding to each channel in the target shot set to be combined, the stacking velocity of the target shot point and the signal data of multiple channels to be combined from the second electronic device 2. Then the first electronic device 1 takes each channel to be combined as the target center channel and the adjacent multiple channels as the target stacking channels. The time difference between the target center channel and the target stacking channel is determined according to the shot offset and the stacking velocity corresponding to the target stacking channel. The time difference between the signal data corresponding to the target stacking channel and the target center channel is adjusted accordingly by the determined time difference, so that when the target stacking channel and the target center channel are combined, the time difference when the effective signal is combined is reduced, and the effective signal can be more prominent, thereby improving the signal-to-noise ratio of the indoor channel combined signal data finally generated. Finally, the target combined channel signal data corresponding to each channel to be combined is processed to generate indoor channel combined signal data, and the indoor channel combined signal data is output to the third electronic device 3. The third electronic device 3 can identify the effective signal, that is, the curve of the reflection wave, according to the indoor channel combined signal data. Each reflection layer corresponds to a reflection wave curve, and the curve shape is usually in the form of a hyperbola. The third electronic device 3 can calculate the stratigraphic position of each reflection layer, the approximate speed of the reflection wave, etc. according to the curve of the effective signal for subsequent seismic exploration research.

[0081] The embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0082] Figure 2 A schematic diagram of a flow chart of an indoor channel signal combination method provided by the first embodiment of the present invention, as shown in FIG. Figure 2 As shown, in this embodiment, the execution subject of the embodiment of the present invention is an indoor channel signal combination device, and the indoor channel signal combination device can be integrated into an electronic device. Then the indoor channel signal combination method provided by this embodiment includes the following steps:

[0083] Step S101, obtaining the shot offset corresponding to each channel in the target shot gather, the stacking velocity of the target shot point, and a plurality of channel signal data to be combined.

[0084] In this embodiment, the stacking velocity refers to the velocity information of the underground strata at a certain position on the surface generated in the process of seismic data velocity analysis and processing, and can generally be obtained by calculation through the received seismic signal data.

[0085] In this embodiment, the plurality of channel signal data to be combined refers to the channel signal data that needs to be combined. The shot offset corresponding to each channel in the target shot set, the stacking velocity of the target shot point, and the plurality of channel signal data to be combined can be obtained from a preset database or from relevant instruments at the seismic exploration site, which is not limited in this embodiment.

[0086] Step S102: for each track to be combined, the track to be combined is determined as the target center track, and multiple tracks adjacent to the target center track are determined as target stacking tracks. The target time difference between the target center track and each target stacking track is determined according to the offset and stacking velocity of each target stacking track. The signal data of the target center track and the signal data of the multiple target stacking tracks are combined according to the target time difference to generate signal data of the target combined track.

[0087] In this embodiment, the target superimposed track is an adjacent track to the target center track. For example, if the target center track is the 5th track, the target superimposed tracks may be the 4th and 6th tracks, or the 3rd, 4th, 6th, 7th tracks, etc. The number of target superimposed tracks may be set according to actual needs.

[0088] In this embodiment, there is a time difference between the target center channel and each target superposition channel. After determining the corresponding target time difference between the target center channel and each target superposition channel, the time relationship between the signal data of the target superposition channel and the target center channel can be adjusted during combination, so that the time difference between the target superposition channel and the target center channel is as small as possible, or even zero. In addition, during combination, the superposition effect of the effective signal in the generated target combination channel signal data is improved, and the signal-to-noise ratio of the effective signal is improved.

[0089] Step S103, processing the target combined channel signal data corresponding to each channel to be combined to generate indoor channel combined signal data.

[0090] In this embodiment, there are many channels to be combined. After each channel to be combined is combined, indoor channel combined signal data, i.e., the overall signal data of seismic exploration corresponding to the target shot point, can be obtained. At the same time, the indoor channel combined signal data can form a seismic exploration effect diagram in the form of time on the vertical axis and channels on the horizontal axis. After each channel to be combined is combined, the reflected wave in the seismic exploration effect diagram is more prominent and the signal-to-noise ratio is higher.

[0091] An embodiment of the present invention provides a method for combining indoor channel signals, the method comprising: obtaining the offset corresponding to each channel in the target shot set, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined. For each channel to be combined, the channel to be combined is determined as the target center channel, and multiple channels adjacent to the target center channel are determined as target stacking channels, the target time difference corresponding to the target center channel and each target stacking channel is determined according to the offset and stacking velocity of each target stacking channel, and the signal data of the target center channel and the signal data of the multiple target stacking channels are combined according to the target time difference to generate target combined channel signal data. The target combined channel signal data corresponding to each channel to be combined is processed to generate indoor channel combined signal data. The indoor channel signal combination method of the embodiment of the present invention obtains the offset corresponding to each channel, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined, and for each channel to be combined, the channel to be combined is used as the target center channel, and multiple adjacent channels are used as target stacking channels. The time difference between the target center channel and the target stacking channel is determined according to the offset and stacking velocity corresponding to the target stacking channel. The time difference between the signal data corresponding to the target superimposed channel and the target center channel is adjusted accordingly by determining the time difference, so that when the target superimposed channel and the target center channel are combined, the time difference when the effective signal is combined is reduced, which can highlight the effective signal and thus improve the signal-to-noise ratio of the indoor channel combined signal data finally generated.

[0092] Figure 3 A schematic diagram of a flow chart of an indoor channel signal combination method provided by a second embodiment of the present invention, as shown in FIG. Figure 3 As shown, the indoor channel signal combination method provided in this embodiment is a further refinement of each step based on the indoor channel signal combination method provided in the previous embodiment of the present invention. The indoor channel signal combination method provided in this embodiment includes the following steps.

[0093] Step S201, obtaining the shot offset corresponding to each channel in the target shot gather, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined.

[0094] In this embodiment, the implementation of step 201 is similar to the implementation of step 101 in the previous embodiment of the present invention, and will not be described in detail here.

[0095] Step S202: for each track to be combined, the track to be combined is determined as the target center track, multiple tracks adjacent to the target center track are determined as target stacking tracks, and the time relationship between the target center track and each target stacking track is determined according to the offset and corresponding stacking velocity of each target stacking track.

[0096] In this embodiment, the target time difference between the target central track and each target superimposed track can be further determined by determining the time relationship between the target central track and each target superimposed track.

[0097] Optionally, in this embodiment, determining the time relationship between the target center track and each target stacking track according to the offset and the corresponding stacking velocity of each target stacking track includes:

[0098] According to the offset and stacking speed of each target stacking channel, the time relationship between the target center channel and each target stacking channel is determined by a preset time difference algorithm. The time difference algorithm is:

[0099]

[0100] Among them, T i，j is the signal receiving time corresponding to the target superposition channel, T0 is the signal receiving time corresponding to the target center channel, SRD i，j is the offset corresponding to the target stacking trace, and V is the stacking velocity.

[0101] In this embodiment, the square difference between the signal receiving time of the target center track and the signal receiving time corresponding to the target stacking track is equal to the square of the quotient between the offset corresponding to the target stacking track and the stacking velocity. The time relationship between the target center track and each target stacking track can be determined by the correlation between the signal receiving time of the target center track and the signal receiving time corresponding to the target stacking track in the time difference algorithm.

[0102] Step S203, determining the target time difference according to the time relationship.

[0103] In this embodiment, the time difference between the target central track and each target superimposed track can be obtained by calculation based on the time relationship between the target central track and each target superimposed track, thereby determining the target time difference.

[0104] Step S204 , dividing the signal data of the target central channel into a plurality of time window signal data to be combined with a preset combination time window length, and arranging them according to a preset time window combination sequence.

[0105] In this embodiment, the signal data of the target center channel is divided into a plurality of time window signal data to be combined with a preset combination time window length. The signal data of the target center channel is the signal data between the time when the shot point is excited and the time when the detector completes receiving the signal. Therefore, the unit of the combination time window length is a time unit, such as milliseconds. The combination time window length can be set according to actual needs, and this embodiment does not limit this.

[0106] In this embodiment, the preset time window combination order can be arranged in sequence. For example, when the length of the combined time window is 50 milliseconds, it can be arranged in the order of 0-50 milliseconds, 25-75 milliseconds, or it can be arranged in the order of 0-50 milliseconds, 51-100 milliseconds. The preset time window combination order can be set according to actual needs, and this embodiment does not limit this.

[0107] Step S205: for each time window signal data to be combined, determine the time window signal data to be combined as the central time window signal data.

[0108] In this embodiment, when signal data is combined, signal data of a combination time window length and a combination time window length are combined in the signal data of the target center channel. Therefore, in the actual combination, the time window signal data to be combined of the target center channel can be determined as the center time window signal data. After combining each center time window signal data with the corresponding superimposed time window signal data, the target combined channel signal data can be obtained.

[0109] Step S206, determining the superimposed time window signal data corresponding to each target superimposed channel according to the target time difference and the central time window signal data, wherein the combined time window length of the superimposed time window signal data is the same as the combined time window length of the central time window signal data.

[0110] In this embodiment, since the time difference between the target central track as a whole and each target superimposed track is the same as the time difference between the target central track and the partial signal data corresponding to each target superimposed track in partial signal data, the time difference between the central time window signal data and each corresponding superimposed time window signal data is also the target time difference. Therefore, the superimposed time window signal data corresponding to each target superimposed track can be determined according to the target time difference and the central time window signal data.

[0111] Step S207: combining the central time window signal data and the corresponding superimposed time window signal data to generate target combined channel signal data.

[0112] In this embodiment, the generated target combined channel signal data is shown in FIG. 5 . Assuming that the target center channel is channel 41 , the target combined channel signal data is data with the horizontal axis at channel 41 and the vertical axis from 0 to 600 milliseconds.

[0113] Optionally, in this embodiment, before combining the central time window signal data and the corresponding superimposed time window signal data, the process further includes:

[0114] A cross-correlation operation is performed on the central time window signal data and each superimposed time window signal data to determine the final superimposed signal data corresponding to the maximum correlation between each superimposed time window signal data and the central time window signal data.

[0115] Combining the central time window signal data with the corresponding superimposed time window signal data includes:

[0116] Combine the central time window signal data and each final superimposed signal data.

[0117] In the present embodiment, the cross-correlation operation is performed on the central time window signal data and each superimposed time window signal data to determine the final superimposed signal data corresponding to the maximum correlation with the central time window signal data in each superimposed time window signal data. Since the target time difference is calculated by the time difference algorithm, it is easy to produce corresponding fluctuations due to the actual seismic exploration situation. Under the condition of the combined time window length, the cross-correlation operation is performed on the central time window signal data and each superimposed time window signal data to further determine the time difference size and the final superimposed signal data when the correlation between the central time window signal data and the superimposed time window signal data is the maximum through the actual waveform data. Thereby, the time difference size of the central time window signal data and the superimposed time window signal data when combined can be further reduced, and the signal-to-noise ratio of the target combined channel signal data finally generated can be improved.

[0118] Optionally, in this embodiment, after combining the central time window signal data and the corresponding superimposed time window signal data, the process further includes:

[0119] The final time difference between the target central track and each target superimposed track is determined according to the combined time window position corresponding to the final superimposed signal data and the combined time window position corresponding to the central time window signal data.

[0120] The final time difference is determined as the target time difference.

[0121] In this embodiment, the cross-correlation operation is performed on the central time window signal data and each superimposed time window signal data, and the final superimposed signal data when the correlation is maximum can be further determined through the actual waveform data. The final time difference determined at this time is more accurate than the target time difference calculated only by the time difference algorithm. Therefore, the final time difference can be determined as the target time difference, thereby improving the signal-to-noise ratio of the target combined channel signal data finally generated when the subsequent related signal data is combined.

[0122] Step S208: Process the target combined channel signal data corresponding to each channel to be combined to generate indoor channel combined signal data.

[0123] In this embodiment, the implementation of step 208 is similar to the implementation of step 103 in the previous embodiment of the present invention, and will not be described in detail here.

[0124] An embodiment of the present invention provides an indoor channel signal combination method. The method obtains the shot offset corresponding to each channel, the stacking velocity of the target shot point and a plurality of channel signal data to be combined. For each channel to be combined, the channel to be combined is used as the target center channel and the adjacent channels are used as the target stacking channels. The target time difference between the target center channel and the target stacking channel is determined according to the shot offset and stacking velocity corresponding to the target stacking channel. At the same time, the target center channel is divided into a plurality of center time window signal data, and the center time window signal data and each stacking time window signal data are further cross-correlated to determine the final stacking signal data corresponding to the maximum correlation with the center time window signal data in each stacking time window signal data. Since the target time difference is calculated by the time difference algorithm, it is easy to produce corresponding fluctuations due to the actual seismic exploration situation. By cross-correlating the center time window signal data and each stacking time window signal data, the time difference between each stacking time window signal data and the center time window signal data and the final stacking signal data when the correlation is maximum can be further determined through the actual waveform data. This can further reduce the time difference between the central time window signal data and the superimposed time window signal data when they are combined, and improve the signal-to-noise ratio of the target combined channel signal data finally generated.

[0125] Figure 4 Schematic diagram of seismic exploration in the indoor channel signal combination method provided by the third embodiment of the present invention. Figure 4 As shown, in order to more clearly understand the indoor channel signal combination method provided by this embodiment, it will be further explained with an actual earthquake exploration scenario.

[0126] As shown in the figure, during seismic exploration, when the blast point is excited, it becomes a seismic source. The geophones are arranged at equal intervals on the surface according to the topography of the surface to receive various signals from the seismic source, including scattered waves, reflected waves reflected by the reflection layer, surface waves, etc. Figure 4 In the figure, V1 refers to the seismic wave propagation velocity at the first reflection layer. Similarly, V2 refers to the second reflection layer, V3 refers to the third reflection layer, and V4 refers to the fourth reflection layer.

[0127] During seismic exploration, when each detector receives complete signal data, preparation for indoor channel combination can begin.

[0128] First, in order to meet the needs of indoor channel combination, it is necessary to prepare an SPS file that describes the field shot detection coordinate relationship, a stacking velocity file at the shot point location, a signal data file to be combined, and a combination parameter file that needs to predetermine the combination time window size and sliding time window size information.

[0129] Among them, the SPS file of the field shot-detector coordinate relationship includes the coordinate positions of the shot point and the detector, and the shot offset of each detector can be calculated.

[0130] After obtaining the relevant file data, the necessary pre-processing can be done on the acquired signal data files to be combined, such as targeted short-wavelength static correction and abnormal strong energy amplitude suppression to further remove the impact of the height difference problem of the detector caused by terrain problems and abnormal energy problems in the seismic exploration process. At the same time, various files and various signal data can be arranged in order to improve the efficiency of the combination when combining indoor channel signals.

[0131] After preliminary processing of relevant file data, you can start indoor channel combination processing. The specific steps are as follows:

[0132] (1) Determine the target shot point that needs to be combined with the indoor channel, and obtain the spatial coordinates Sx, Sy of the shot point from the corresponding SPS file.

[0133] (2) The spatial coordinates Rx and Ry of each channel in the shot gather are obtained through the relationship file and the detection point file in the SPS.

[0134] (3) Calculate the offset of each channel in the shot gather

[0135] (4) The track to be combined is determined as the target center track, and multiple tracks adjacent to the target center track are determined as target stacking tracks. The target time difference between the target center track and each target stacking track is determined according to the offset and the corresponding stacking velocity of each target stacking track. At the same time, the target center track is divided into multiple time window signal data to be combined with an arrangement order. For each time window signal data to be combined in the target center track, the time window signal data to be combined is determined as the center time window signal data. The center time of the center time window signal data is used as the self-excitation and self-receiving T0 time. According to the time difference algorithm, the combined time window position Ti,j corresponding to each stacking time window signal data is calculated, that is, the time of receiving the signal data.

[0136]

[0137] (5) Cross-correlate the central time window signal data with the superimposed time window signal data to determine the final time difference.

[0138] (6) The center time window signal data and the corresponding superimposed time window signal data are combined according to the final time difference until all signal data of the target center channel are combined, and the combined target combined channel signal data is placed in the time window generated by the final indoor channel combined signal data.

[0139] (8) Repeat steps 4, 5, 6, and 7 until all the channels to be combined are combined, thereby generating indoor channel combined signal data and corresponding exploration signal recording effect diagrams.

[0140] In the prior art, the exploration signal recording effect diagram after indoor combination is as follows: Figure 5a As shown, the first curve from top to bottom is the direct wave, the second curve is the reflected wave of the first reflection layer, the third curve is the reflected wave of the second reflection layer, and the fourth curve is the reflected wave of the third reflection layer. As can be seen from the figure, due to the influence of the noise data in the figure, it is difficult to clearly distinguish which of the three reflection wave curves is the signal data of the noise and which is the signal data of the reflection wave curve.

[0141] If you zoom in on a part of the image, Figure 5b and Figure 5c Similarly, it can more effectively show the situation where the effective signal is "polluted" by noise. The lower the layer, the weaker the reflected signal itself, so the effective signal is more difficult to distinguish after being interfered by noise, and the signal-to-noise ratio is lower.

[0142] The target combined channel signal data generation process of this embodiment is as follows: Figure 6a and Figure 6b shown. Figure 6a This is a local image of the first layer of reflection waves from a long-range inspection. Figure 6a and Figure 6b The vertical axis is time, and the horizontal axis is the number of channels. This embodiment takes the combination of the signal data of channel 7 as an example for explanation. If the number of combined channels is set to 13, when the signal data of channel 7 needs to be combined, 1-6 and 8-13 can be selected as the target superposition channels for superposition. The effect after superposition is as follows Figure 6b As shown. Figure 6b It can be clearly seen that the signal-to-noise ratio is significantly enhanced after superposition. After all the combinations, the exploration signal recording effect diagram is as follows: Figure 7 As shown in the figure, the effect of exploration signal recording without combined processing is Figure 5a It can be clearly seen that the signal-to-noise ratio is higher, and the curves of the three reflected waves can be identified more clearly and accurately.

[0143] Figure 8 A schematic diagram of the structure of an indoor channel signal combination device provided by a fourth embodiment of the present invention is shown in FIG. Figure 8 As shown, in this embodiment, the indoor channel signal combination device 300 includes:

[0144] The acquisition module 301 is used to acquire the shot offset corresponding to each channel in the target shot gather, the stacking velocity of the target shot point, and a plurality of channel signal data to be combined.

[0145] The target track combination generating module 302 is used for determining, for each track to be combined, the track to be combined as the target center track, determining multiple tracks adjacent to the target center track as target stacking tracks, determining the corresponding target time difference between the target center track and each target stacking track according to the offset and stacking velocity of each target stacking track, combining the signal data of the target center track with the signal data of the multiple target stacking tracks according to the target time difference, and generating target combination track signal data.

[0146] The indoor channel combination generating module 303 is used to process the target combined channel signal data corresponding to each channel to be combined to generate indoor channel combined signal data.

[0147] The indoor channel signal combination device provided in this embodiment can be executed Figure 2 The technical solution of the method embodiment shown in the figure has the same implementation principle and technical effect as Figure 2 The method embodiments shown are similar and will not be described in detail here.

[0148] Meanwhile, another embodiment of the indoor channel signal combination device provided by the present invention further refines the indoor channel signal combination device 300 based on the indoor channel signal combination device provided by the previous embodiment.

[0149] Optionally, when determining the target time difference corresponding to the target center track and each target stacking track according to the offset and stacking velocity of each target stacking track, the target track combination generating module 302 is specifically used to:

[0150] The time relationship between the target center track and each target stacking track is determined based on the offset of each target stacking track and the corresponding stacking velocity. The target time difference is determined based on the time relationship.

[0151] Optionally, in this embodiment, when determining the time relationship between the target center trace and each target stack trace according to the offset and the corresponding stacking velocity of each target stack trace, the target trace combination generating module 302 is specifically configured to:

[0152] According to the offset and stacking speed of each target stacking channel, the time relationship between the target center channel and each target stacking channel is determined by a preset time difference algorithm. The time difference algorithm is:

[0153]

[0154] Among them, T i，j is the signal receiving time corresponding to the target superposition channel, T0 is the signal receiving time corresponding to the target center channel, SRD i，j is the offset corresponding to the target stacking trace, and V is the stacking velocity.

[0155] Optionally, in this embodiment, when combining the signal data of the target center channel and the signal data of multiple target superposition channels according to the target time difference, the target channel combination generation module 302 is specifically used to:

[0156] The signal data of the target center channel is divided into a plurality of time window signal data to be combined with a preset combination time window length, and arranged according to a preset time window combination order. For each time window signal data to be combined, the time window signal data to be combined is determined as the center time window signal data. The superimposed time window signal data corresponding to each target superimposed channel is determined according to the target time difference and the center time window signal data. Among them, the combined time window length of the superimposed time window signal data is the same as the combined time window length of the center time window signal data. The center time window signal data and the corresponding superimposed time window signal data are combined.

[0157] Optionally, in this embodiment, the target track combination generating module 302 is further used for:

[0158] A cross-correlation operation is performed on the central time window signal data and each superimposed time window signal data to determine the final superimposed signal data corresponding to the maximum correlation between each superimposed time window signal data and the central time window signal data.

[0159] At the same time, the target channel combination generation module is specifically used to combine the central time window signal data and the corresponding superimposed time window signal data:

[0160] Combine the central time window signal data and each final superimposed signal data.

[0161] Optionally, in this embodiment, the indoor channel signal combination device 300 further includes:

[0162] The target time difference determination module is used to determine the corresponding final time difference between the target central track and each target superimposed track according to the combined time window position corresponding to the final superimposed signal data and the combined time window position corresponding to the central time window signal data, and determine the final time difference as the target time difference.

[0163] The indoor channel signal combination device provided in this embodiment can be executed Figure 2-Figure 3 The technical solution of the method embodiment shown in the figure has the same implementation principle and technical effect as Figure 2-Figure 3 The method embodiments shown are similar and will not be described in detail here.

[0164] According to an embodiment of the present invention, the present invention also provides an electronic device, a computer-readable storage medium and a computer program product.

[0165] like Fig. 9 As shown, Fig. 91 is a schematic diagram of the structure of an electronic device provided by the fifth embodiment of the present invention. The electronic device is intended to be various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0166] like Fig. 9 As shown, the electronic device includes: a processor 401 and a memory 402. The various components are connected to each other using different buses and can be installed on a common mainboard or in other ways as required. The processor can process instructions executed in the electronic device.

[0167] The memory 402 is a non-transitory computer-readable storage medium provided by the present invention. The memory stores instructions executable by at least one processor to enable at least one processor to execute the indoor channel signal combination method provided by the present invention. The non-transitory computer-readable storage medium of the present invention stores computer instructions, which are used to enable a computer to execute the indoor channel signal combination method provided by the present invention.

[0168] The memory 402 is a non-transient computer-readable storage medium that can be used to store non-transient software programs, non-transient computer executable programs and modules, such as program instructions / modules corresponding to the indoor channel signal combination method in the embodiment of the present invention (for example, the attached Figure 8 The processor 401 executes various functional applications and data processing of the server by running the non-transient software programs, instructions and modules stored in the memory 402, that is, the indoor channel signal combination method in the above method embodiment is implemented.

[0169] Those skilled in the art will readily appreciate other implementations of the embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the embodiments of the present invention that follow the general principles of the embodiments of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the embodiments of the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the embodiments of the present invention are indicated by the following claims.

[0170] It should be understood that the embodiments of the present invention are not limited to the precise structures described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present invention is limited only by the appended claims.

Claims

1. A method for combining indoor channel signals, characterized in that: include: Obtain the corresponding offset of each channel in the target shot set, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined; For each track to be combined, the track to be combined is determined as a target center track, a plurality of tracks adjacent to the target center track are determined as target stacking tracks, a target time difference corresponding to the target center track and each target stacking track is determined according to the offset and the stacking velocity of each target stacking track, and signal data of the target center track and signal data of the plurality of target stacking tracks are combined according to the target time difference to generate signal data of the target combined track; Processing target combined channel signal data corresponding to each channel to be combined to generate indoor channel combined signal data; Wherein, determining the corresponding target time difference between the target center track and each target stacking track according to the offset of each target stacking track and the stacking velocity comprises: According to the offset of each target stacking track and the stacking speed, the time relationship between the target center track and each target stacking track is determined by a preset time difference algorithm; according to the time relationship, the target time difference is determined; wherein the time difference algorithm is: Among them, T i，j is the signal receiving time corresponding to the target superposition channel, T0 is the signal receiving time corresponding to the target center channel, SRD i，j is the offset corresponding to the target stack trace, V is the stacking velocity; The step of combining the signal data of the target central channel and the signal data of multiple target superimposed channels according to the target time difference comprises: The signal data of the target center channel is divided into a plurality of time window signal data to be combined with preset combination time window lengths, and arranged according to a preset time window combination order; for each time window signal data to be combined, the time window signal data to be combined is determined as the center time window signal data; the superimposed time window signal data corresponding to each target superimposed channel is determined according to the target time difference and the center time window signal data; wherein the combined time window length of the superimposed time window signal data is the same as the combined time window length of the center time window signal data; and the center time window signal data and the corresponding superimposed time window signal data are combined.

2. The method according to claim 1, characterized in that Before combining the central time window signal data and the corresponding superimposed time window signal data, the method further includes: Performing a cross-correlation operation on the central time window signal data and each superimposed time window signal data to determine final superimposed signal data corresponding to the maximum correlation between each superimposed time window signal data and the central time window signal data; Combining the central time window signal data with the corresponding superimposed time window signal data includes: Combine the central time window signal data and each final superimposed signal data.

3. The method according to claim 2, characterized in that After combining the central time window signal data and the corresponding superimposed time window signal data, the method further includes: Determine the final time difference between the target center track and each target superimposed track according to the combined time window position corresponding to the final superimposed signal data and the combined time window position corresponding to the central time window signal data; The final time difference is determined as the target time difference.

4. An indoor channel signal combination device, characterized in that: include: An acquisition module is used to acquire the shot offset corresponding to each channel in the target shot set, the stacking velocity of the target shot point, and the signal data of multiple channels to be combined; a target track combination generating module, for each track to be combined, determining the track to be combined as a target center track, determining a plurality of tracks adjacent to the target center track as target stacking tracks, determining a corresponding target time difference between the target center track and each target stacking track according to the offset and the stacking velocity of each target stacking track, combining signal data of the target center track with signal data of the plurality of target stacking tracks according to the target time difference, and generating target combination track signal data; An indoor channel combination generation module is used to process target combination channel signal data corresponding to each channel to be combined to generate indoor channel combination signal data; Wherein, when determining the corresponding target time difference between the target center track and each target stacking track according to the offset and stacking velocity of each target stacking track, the target track combination generation module is specifically used to: According to the offset of each target stacking track and the stacking speed, the time relationship between the target center track and each target stacking track is determined by a preset time difference algorithm; the target time difference is determined according to the time relationship; wherein the time difference algorithm is: Among them, T i，j is the signal receiving time corresponding to the target superposition channel, T0 is the signal receiving time corresponding to the target center channel, SRD i，j is the offset corresponding to the target stack trace, V is the stacking velocity; The target track combination generation module is specifically used to combine the signal data of the target center track and the signal data of multiple target superposition tracks according to the target time difference: The signal data of the target center channel is divided into a plurality of time window signal data to be combined with preset combination time window lengths, and arranged according to a preset time window combination order; for each time window signal data to be combined, the time window signal data to be combined is determined as the center time window signal data; the superimposed time window signal data corresponding to each target superimposed channel is determined according to the target time difference and the center time window signal data; wherein the combined time window length of the superimposed time window signal data is the same as the combined time window length of the center time window signal data; and the center time window signal data and the corresponding superimposed time window signal data are combined.

5. An electronic device, characterized in that: include: Memory, processor; Memory; a memory for storing instructions executable by the processor; The processor is configured to execute the indoor channel signal combination method according to any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the indoor channel signal combination method according to any one of claims 1 to 3.

7. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the indoor channel signal combination method according to any one of claims 1 to 3 is implemented.

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