CN114236536B - Railway roadbed ground penetrating radar data processing system and method thereof - Google Patents
Railway roadbed ground penetrating radar data processing system and method thereof Download PDFInfo
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- 230000000149 penetrating effect Effects 0.000 title claims abstract description 21
- 238000004458 analytical method Methods 0.000 claims abstract description 118
- 230000002159 abnormal effect Effects 0.000 claims abstract description 110
- 238000012937 correction Methods 0.000 claims abstract description 34
- 230000007547 defect Effects 0.000 claims description 66
- 230000003595 spectral effect Effects 0.000 claims description 49
- 238000001914 filtration Methods 0.000 claims description 29
- 238000010606 normalization Methods 0.000 claims description 19
- 238000007781 pre-processing Methods 0.000 claims description 19
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/885—Radar or analogous systems specially adapted for specific applications for ground probing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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Abstract
The invention discloses a railway subgrade ground penetrating radar data processing system and a method thereof, wherein the system comprises: the system comprises a data processing module, a mileage correction module, an automatic analysis module, an abnormal area analysis module and a horizon tracking module; the method comprises the following steps: s1, processing data; s2, mileage correction; s3, automatic analysis; and S4, analyzing abnormal areas. The invention can effectively improve the processing speed and the accuracy of the data detected by the railway roadbed and solves the technical problem of low manual interpretation efficiency in the prior art.
Description
Technical Field
The invention relates to the technical field of railway roadbed ground penetrating radar, in particular to a railway roadbed ground penetrating radar data processing system and a method thereof.
Background
In the process of rapidly detecting the railway subgrade ground penetrating radar, the data volume of the railway subgrade detection is large, wherein the data volume mainly comprises 3 measuring lines, about 26GB per 30km, the current mature ground penetrating radar processing software in the market cannot meet the data processing requirement, the manual interpretation efficiency is low, and a large amount of manpower and time are consumed for horizon tracking and mileage correction.
Therefore, how to provide a railway subgrade ground penetrating radar data processing system and a method thereof are problems to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of this, the present invention provides a system and a method for processing data of a railroad bed ground penetrating radar, which aims to improve the processing speed and accuracy of data detected by a railroad bed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a railroad bed ground penetrating radar data processing system, comprising: the system comprises a data processing module, a mileage correction module, an automatic analysis module, an abnormal area analysis module and a horizon tracking module;
the data processing module is used for determining a proper frequency range of band-pass filtering, completing digital filtering and whole-course background filtering, analyzing the characteristics of waveforms at a defect position, a bridge position and a tunnel position, and sending the processed data to the mileage correction module;
the mileage correction module is used for determining the mileage corresponding to each spectral line according to the processed data, correcting the mileage corresponding to each line in the data through a bridge with a known center position and length, carrying out normalization check, generating a data file containing mileage information after meeting the normalization check, and marking the positions of the bridge and the tunnel;
the automatic analysis module is used for selectively carrying out automatic abnormal area analysis on the data under the plurality of sub-paths to obtain a preliminary abnormal area analysis result and sending the preliminary abnormal area analysis result to the abnormal area analysis module;
the abnormal area analysis module is used for displaying a preliminary abnormal area analysis result and known positions of the bridge and the tunnel and providing a mode for selecting the abnormal area, so that abnormal area analysis is performed on data of measuring points at the left side, the center and the right side of the track to obtain the type of the abnormal area, the initial spectral line position, the cutoff spectral line position, the initial depth and the cutoff depth of the abnormal area, and the abnormal area analysis result is obtained.
Preferably, the mileage correction module comprises a marked mileage file acquisition unit, an accurate mileage positioning unit and a normalization check unit;
the marked mileage file acquiring unit is used for acquiring marked mileage setting recorded in a test process to obtain approximate initial mileage and mileage direction;
the accurate mileage positioning unit is used for finding a spectral line corresponding to the center mileage of the bridge according to the center mileage of the known bridge, and completing accurate mileage positioning;
in the equidistant mileage marking mode, accurate mileage correction is carried out according to the distance of the marking spectral lines and the initial mileage;
generating a mileage sign file; the mileage mark file contains the identified central mileage of the bridge, the corresponding spectral line position, the corresponding bridge length, the central mileage of the tunnel, the corresponding spectral line position, the corresponding tunnel length, the initial mileage of a long chain or a short chain, the spectral line position corresponding to the initial mileage and the corresponding long chain or short chain length;
calculating the accurate mileage corresponding to each waveform from the original data file according to the mileage sign file;
the normalization checking unit is used for checking whether the spectral line spacing between the bridges is consistent with the standard spacing, if not, calculating and displaying the number of the phase difference spectral lines, and allowing the serial number of the central spectral line corresponding to the bridge to be changed.
Preferably, the data processing module comprises a preprocessing unit, a corrected data processing unit and a data backup unit;
the preprocessing unit is used for checking whether the data lengths of the three measuring points of the same road section are consistent or not, aligning the data lengths when the data lengths are inconsistent, and preprocessing the data before mileage correction;
the corrected data processing unit is used for carrying out time domain or frequency domain analysis on a certain waveform, a continuous multi-channel waveform or an average curve of the continuous multi-channel waveform to process data;
wherein processing the data comprises: compressing or expanding the sampled data, and uniformly selecting and extracting or averaging the waveform data; setting the data of the designated track to zero; carrying out digital filtering and whole-course background filtering; performing integral or differential transformation according to the setting; analyzing the characteristics of the waveform of the defective area or the waveform of the bridge tunnel;
the data backup unit is used for storing the data processed by the preprocessing unit and the corrected data processing unit and backing up the original data.
Preferably, the automatic analysis module comprises a path selection unit, a parameter selection unit and an automatic abnormal area analysis unit;
the path selection unit is used for selecting and changing data under a plurality of sub paths;
the parameter selection unit is used for selecting a depth range of automatic analysis in a parameter bar;
the automatic abnormal region analysis unit is used for preliminarily and automatically analyzing the defects and sending the preliminary abnormal region analysis result to the abnormal region analysis module.
Preferably, the abnormal region analysis module includes an abnormal region positioning unit, a defect property selection unit, a defect analysis unit, a gain adjustment unit and a result output unit;
the abnormal area positioning unit is used for determining the upper, lower, left and right boundaries of the abnormal area and positioning the abnormal area;
the defect property selection unit is used for selecting the defect property of the determined abnormal region and supplementing the description of the defect property through remarks under the condition that the defect property needs to be supplemented;
the defect analysis unit is used for selecting measuring points at different positions to carry out defect analysis and acquiring data corresponding to the defects;
the gain adjusting unit is used for selecting a gain mode and adjusting the gain according to the gain mode, wherein an initial depth, a cut-off depth, a target depth and a target gain are set, local gain adjustment is carried out, and the local gain is multiplied by the original global gain to realize global gain adjustment;
the result output unit is used for exporting the table and outputting the analysis report.
Preferably, the table derived by the result output unit includes an uplink defect list, a downlink defect list, and defect properties;
outputting single-channel display and multi-channel display in an analysis report:
the output analysis report of the single-channel display comprises a defect data table of the current channel measuring point and all abnormal area bitmaps;
the output analysis report of the multi-channel display comprises: and (3) uniformly integrating multiple channels of defects, unifying starting and ending mileage, unifying starting depth and ending depth when more than two defect local areas are overlapped, outputting a defect data table and an abnormal area bitmap according to one defect, and indicating a channel corresponding to the defect in the defect data table and the abnormal area bitmap.
Preferably, the system also comprises a horizon tracking module, wherein the horizon tracking module comprises a layer number determining unit and an automatic layering unit;
the layer number determining unit is used for selecting the layer number which needs to be determined currently;
and the automatic layering unit is used for finishing automatic layering of the track foundation data according to the determined layer number and the input starting depth and the input ending depth.
A railway subgrade ground penetrating radar data processing method comprises the following steps:
s1, data processing; determining a proper frequency range of band-pass filtering, completing digital filtering and whole-course background filtering, and analyzing the characteristics of waveforms at the defect position, the bridge position and the tunnel position;
s2, mileage correction; determining the mileage corresponding to each spectral line according to the processed data, correcting the mileage corresponding to each path in the data through a bridge with known center position and length, carrying out normalization check, generating a data file containing mileage information after meeting the normalization check, and marking the positions of the bridge and the tunnel;
s3, automatic analysis; selecting data under a plurality of sub-paths to perform automatic abnormal area analysis to obtain a primary abnormal area analysis result;
s4, analyzing abnormal areas; and (4) combining the preliminary abnormal area analysis result, skipping the bridge and the tunnel according to the known positions of the bridge and the tunnel, and analyzing the abnormal area of the data of the measuring points at the left side, the center and the right side of the track to obtain the type of the abnormal area, the initial spectral line position, the cutoff spectral line position, the initial depth and the cutoff depth of the abnormal area, so as to obtain the abnormal area analysis result.
Compared with the prior art, the invention discloses a railway roadbed ground penetrating radar data processing system and a method thereof, which have the following beneficial effects:
according to the invention, mileage correction can be further carried out by analyzing the geological radar measurement data in the original file format, so that the processing of ground penetrating radar data is further completed;
the method can identify certain spectral lines, set corresponding mileage for the spectral lines with the identification, judge whether the change of the mileage is increased or decreased and preliminarily calculate the initial mileage. And a mileage equal interval identification mode is supported. For the identification mode of mileage equal interval, the distance of the line difference of the file spectral lines after mileage correction is equal, and the distance of the line difference is obtained according to setting.
The method can calibrate the mileage according to the central mileage and the bridge length of the bridge, and the mileage calibration supports long-chain and short-chain identification. The results of the mileage correction can be subjected to normalization check, and whether the results of the mileage correction are reasonable or not is judged. When no known bridge information exists, the position of the bridge can still be marked, but the position of the bridge is not used for mileage correction. After the mileage is calibrated, the positions of the bridge and the tunnel can be marked out in the analysis process, and the bridge and the tunnel can be skipped in the abnormal area analysis process.
The method can conveniently identify the abnormal area of the disease, and derive the related information of the abnormal disease, thereby achieving the purpose of rapidly processing and explaining the geological radar data.
Automatic and semi-automatic horizon tracking can be performed, and a hierarchical table is output according to a set interval. And calculating the accurate depth of each layer under each section according to the set different wave velocity of each layer.
The system can copy images, store bitmaps and tables, and automatically output a full-course analysis report.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a railway subgrade ground penetrating radar data processing system, which comprises: the system comprises a data processing module, a mileage correction module, an automatic analysis module, an abnormal area analysis module and a horizon tracking module;
the data processing module is used for determining a proper frequency range of band-pass filtering, completing digital filtering and whole-course background filtering, analyzing the characteristics of waveforms at a defect position, a bridge position and a tunnel position, and sending the processed data to the mileage correction module;
the mileage correction module is used for determining the mileage corresponding to each spectral line according to the processed data, correcting the mileage corresponding to each line in the data through a bridge with a known center position and length, carrying out normalization check, generating a data file containing mileage information after meeting the normalization check, and marking the positions of the bridge and the tunnel;
the automatic analysis module is used for selectively carrying out automatic abnormal area analysis on the data under the plurality of sub-paths to obtain a primary abnormal area analysis result and sending the initial abnormal area analysis result to the abnormal area analysis module;
and the abnormal area analysis module is used for displaying the initial abnormal area analysis result and the known positions of the bridge and the tunnel and providing a selection mode for the abnormal area, so that the abnormal area analysis is performed on the data of the measuring points at the left side, the center and the right side of the track to obtain the type of the abnormal area, the initial spectral line position, the cutoff spectral line position, the initial depth and the cutoff depth of the abnormal area and obtain the abnormal area analysis result.
It should be noted that:
the automatic analysis module in this embodiment automatically performs exception analysis on data under multiple sub-paths through the system itself to obtain a preliminary exception area analysis result, and the exception area analysis module provides a platform for selecting an exception area to a user, so as to implement semi-automatic manual analysis, and finally obtain complete content of exception area analysis by combining the preliminary exception area analysis result.
In order to further implement the technical scheme, the mileage correction module comprises a marked mileage file acquisition unit, an accurate mileage positioning unit and a normalization check unit;
the marked mileage file acquiring unit is used for acquiring marked mileage setting recorded in the test process to obtain approximate initial mileage and mileage direction;
the accurate mileage positioning unit is used for finding a spectral line corresponding to the central mileage of the bridge according to the known central mileage of the bridge, and completing accurate mileage positioning;
in the equidistant mileage marking mode, accurate mileage correction is carried out according to the distance of the marking spectral lines and the initial mileage;
generating a mileage sign file; the mileage mark file contains the identified central mileage of the bridge, the corresponding spectral line position, the corresponding bridge length, the central mileage of the tunnel, the corresponding spectral line position, the corresponding tunnel length, the initial mileage of the long chain or the short chain, the spectral line position corresponding to the initial mileage and the corresponding long chain or the short chain length;
calculating the accurate mileage corresponding to each waveform from the original data file according to the mileage mark file;
and the normalization checking unit is used for checking whether the spectral line spacing between the bridges is consistent with the standard spacing, if not, calculating and displaying the number of the phase-difference spectral lines, and allowing the serial number of the central spectral line corresponding to the bridge to be changed.
It should be noted that:
the mileage mark file contains the identified central mileage of the bridge (the data is invariable and is obtained from the standing book table file), the corresponding spectral line position (identified by software), and the corresponding bridge length (identified by software and actually the length of the guard rail); the central mileage of the tunnel (the data is invariable and is obtained from the standing book table file), the corresponding spectral line position (obtained by calculating the central spectral line of the bridge), and the corresponding tunnel length (the data is invariable and is obtained from the standing book table file); the initial mileage of the long chain or the short chain (the data is invariable and is obtained from the standing book table file), the spectral line position corresponding to the initial mileage (obtained by calculating the central spectral line of the bridge), and the corresponding long chain or short chain length (the data is invariable and is obtained from the standing book table file).
The new files after mileage correction can be stored at equal intervals, and each data record the mileage after correction.
If the mileage correction is not needed, the initial mileage is manually input in the preprocessing unit, the direction of the mileage change is determined, and then other processing is carried out.
In order to further implement the technical scheme, the data processing module comprises a preprocessing unit, a corrected data processing unit and a data backup unit;
the preprocessing unit is used for checking whether the data lengths of the three measuring points of the same road section are consistent or not, aligning the data lengths when the data lengths are inconsistent, and preprocessing the data before mileage correction;
the corrected data processing unit is used for carrying out time domain or frequency domain analysis on a certain waveform, a continuous multi-channel waveform or an average curve of the continuous multi-channel waveform to process data;
wherein processing the data comprises: compressing or expanding the sampled data, and uniformly selecting and extracting or averaging the waveform data; setting the data of the designated track to zero; carrying out digital filtering and whole-course background filtering; performing integral or differential transformation according to the setting; analyzing the characteristics of the waveform of the defective area or the waveform of the bridge tunnel;
the data backup unit is used for storing the data processed by the preprocessing unit and the corrected data processing unit and backing up the original data.
It should be noted that:
if a road section has a plurality of measuring points and the data lengths are inconsistent, preprocessing is necessary. The preprocessing can ensure that the data lengths of a plurality of measuring points are consistent. The preprocessing may compress the waveform, compress or expand the data for each cross-section, zero the data for some cross-sections, background filtering, bandpass filtering, data conditioning (integration or differentiation). The preprocessing module only performs global background filtering, but not local sliding background filtering, so as to simultaneously consider abnormal region analysis and hierarchical analysis. The preprocessed files do not need to carry out digital filtering on data when abnormal area analysis is carried out, and the analysis speed can be accelerated.
In order to further implement the technical scheme, the automatic analysis module comprises a path selection unit, a parameter selection unit and an automatic abnormal area analysis unit;
the path selection unit is used for selecting and changing data under a plurality of sub paths;
the parameter selection unit is used for selecting the depth range of automatic analysis in the parameter column;
the automatic abnormal area analysis unit is used for performing preliminary automatic defect analysis and sending a preliminary abnormal area analysis result to the abnormal area analysis module.
It should be noted that:
the automatic analysis module can selectively carry out mileage correction on the data under the plurality of sub-paths, carry out batch data preprocessing according to set parameters and automatically carry out abnormal area analysis. Whether automatic mileage correction, preprocessing, and abnormal area analysis is performed can be set. The automatic abnormal area analysis can obtain a preliminary analysis result, and the analysis speed can be improved when the abnormal area analysis is carried out.
In order to further implement the above technical solution, the abnormal region analyzing module includes an abnormal region positioning unit, a defect property selecting unit, a defect analyzing unit, a gain adjusting unit and a result outputting unit;
the abnormal area positioning unit is used for determining the upper, lower, left and right boundaries of the abnormal area and positioning the abnormal area;
the defect property selection unit is used for selecting the defect property of the determined abnormal region and supplementing the description of the defect property through remarks under the condition that the defect property needs to be supplemented;
the defect analysis unit is used for selecting measuring points at different positions to carry out defect analysis and acquiring data corresponding to the defects;
the gain adjusting unit is used for selecting a gain mode and adjusting gain according to the gain mode, wherein an initial depth, a cut-off depth, a target depth and a target gain are set, local gain adjustment is carried out, and the local gain is multiplied by the original global gain to realize global gain adjustment;
the result output unit is used for exporting the table and outputting the analysis report.
It should be noted that:
the result output unit can integrate the analysis results of different mileage intervals under a plurality of sub-paths into one analysis report in the actual use process.
In order to further implement the above technical solution, the table derived by the result output unit includes an uplink defect list, a downlink defect list, and defect properties;
outputting single-channel display and multi-channel display in an analysis report:
the output analysis report displayed by the single channel comprises a defect data table of the current channel measuring point and all abnormal area bitmaps;
the output analysis report of the multi-channel display comprises: and (3) uniformly integrating multiple channels of defects, unifying starting and ending mileage, unifying starting depth and ending depth when more than two defect local areas are overlapped, outputting a defect data table and an abnormal area bitmap according to one defect, and indicating a channel corresponding to the defect in the defect data table and the abnormal area bitmap.
In order to further implement the technical scheme, the system further comprises a horizon tracking module, wherein the horizon tracking module comprises a layer number determining unit and an automatic layering unit.
The layer number determining unit is used for selecting the layer number which needs to be determined currently;
and the automatic layering unit is used for completing automatic layering of the track foundation data according to the determined layer number and the input starting depth and the input ending depth.
It should be noted that:
and outputting the layered results in a table mode according to the set interval.
A railway subgrade ground penetrating radar data processing method comprises the following steps:
s1, a data processing module; determining a proper frequency range of band-pass filtering, completing digital filtering and whole-course background filtering, and analyzing the characteristics of waveforms at the defect position, the bridge position and the tunnel position;
s2, a mileage correction module; determining the mileage corresponding to each spectral line according to the processed data, correcting the mileage corresponding to each path in the data through a bridge with known center position and length, carrying out normalization check, generating a data file containing mileage information after meeting the normalization check, and marking the positions of the bridge and the tunnel;
s3, automatic analysis; selecting data under a plurality of sub paths to carry out automatic abnormal area analysis to obtain a primary abnormal area analysis result;
s4, analyzing abnormal areas; and (4) combining the preliminary abnormal area analysis result, skipping the bridge and the tunnel according to the known positions of the bridge and the tunnel, and analyzing the abnormal area of the data of the measuring points at the left side, the center and the right side of the track to obtain the type of the abnormal area, the initial spectral line position, the cutoff spectral line position, the initial depth and the cutoff depth of the abnormal area, so as to obtain the abnormal area analysis result.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A railway subgrade ground penetrating radar data processing system is characterized by comprising: the system comprises a data processing module, a mileage correction module, an automatic analysis module, an abnormal area analysis module and a horizon tracking module;
the data processing module is used for determining a proper frequency range of band-pass filtering, completing digital filtering and whole-course background filtering, analyzing the characteristics of waveforms at a defect position, a bridge position and a tunnel position, and sending the processed data to the mileage correction module;
the mileage correction module is used for determining the mileage corresponding to each spectral line according to the processed data, correcting the mileage corresponding to each line in the data through a bridge with a known center position and length, carrying out normalization check, generating a data file containing mileage information after meeting the normalization check, and marking the positions of the bridge and the tunnel;
the automatic analysis module is used for selectively carrying out automatic abnormal area analysis on the data under the plurality of sub-paths to obtain a preliminary abnormal area analysis result and sending the preliminary abnormal area analysis result to the abnormal area analysis module;
the abnormal area analysis module is used for displaying a preliminary abnormal area analysis result and known positions of a bridge and a tunnel and providing a mode for selecting the abnormal area, so that abnormal area analysis is carried out on data of measuring points at the left side, the center and the right side of the track to obtain the type of the abnormal area, the initial spectral line position, the cutoff spectral line position, the initial depth and the cutoff depth of the abnormal area and obtain an abnormal area analysis result;
the mileage correction module comprises a marked mileage file acquisition unit, an accurate mileage positioning unit and a normalization check unit;
the marked mileage file acquiring unit is used for acquiring marked mileage setting recorded in a test process to obtain approximate initial mileage and mileage direction;
the accurate mileage positioning unit is used for finding a spectral line corresponding to the center mileage of the bridge according to the center mileage of the known bridge, and completing accurate mileage positioning;
in the equidistant mileage marking mode, accurate mileage correction is carried out according to the distance of the marking spectral lines and the initial mileage;
generating a mileage sign file; the mileage mark file contains the identified central mileage of the bridge, the corresponding spectral line position, the corresponding bridge length, the central mileage of the tunnel, the corresponding tunnel length, the initial mileage of the long chain or the short chain, the spectral line position corresponding to the initial mileage and the corresponding long chain or the short chain length;
calculating the accurate mileage corresponding to each waveform from the original data file according to the mileage sign file;
the normalization checking unit is used for checking whether the spectral line spacing between the bridges is consistent with the standard spacing, if not, calculating and displaying the number of the phase difference spectral lines, and allowing the serial number of the central spectral line corresponding to the bridge to be changed.
2. The railway subgrade ground penetrating radar data processing system of claim 1, wherein the data processing module comprises a preprocessing unit, a corrected data processing unit and a data backup unit;
the preprocessing unit is used for checking whether the data lengths of the three measuring points of the same road section are consistent or not, aligning the data lengths when the data lengths are inconsistent, and preprocessing the data before mileage correction;
the corrected data processing unit is used for carrying out time domain or frequency domain analysis on a certain waveform, a continuous multi-channel waveform or an average curve of the continuous multi-channel waveform to process data;
wherein processing the data comprises: compressing or expanding the sampled data, and uniformly selecting and extracting or averaging the waveform data; setting the data of the designated track to zero; carrying out digital filtering and whole-course background filtering; performing integral or differential transformation according to the setting; analyzing the characteristics of the waveform of the defective area or the waveform of the bridge tunnel;
the data backup unit is used for storing the data processed by the preprocessing unit and the corrected data processing unit and backing up the original data.
3. The railway subgrade ground penetrating radar data processing system of claim 1, wherein the automatic analysis module comprises a path selection unit, a parameter selection unit and an automatic abnormal area analysis unit;
the path selection unit is used for selecting and changing data under a plurality of sub paths;
the parameter selection unit is used for selecting a depth range of automatic analysis in a parameter bar;
the automatic abnormal region analysis unit is used for preliminarily and automatically analyzing the defects and sending the preliminary abnormal region analysis result to the abnormal region analysis module.
4. The railway subgrade ground penetrating radar data processing system of claim 1, wherein the abnormal region analysis module comprises an abnormal region positioning unit, a defect property selection unit, a defect analysis unit, a gain adjustment unit and a result output unit;
the abnormal area positioning unit is used for determining the upper, lower, left and right boundaries of the abnormal area and positioning the abnormal area;
the defect property selection unit is used for selecting the defect property of the determined abnormal region and supplementing the description of the defect property through remarks under the condition that the defect property needs to be supplemented;
the defect analysis unit is used for selecting measuring points at different positions to carry out defect analysis and acquiring data corresponding to the defects;
the gain adjusting unit is used for selecting a gain mode and adjusting the gain according to the gain mode, wherein an initial depth, a cut-off depth, a target depth and a target gain are set, local gain adjustment is carried out, and the local gain is multiplied by the original global gain to realize global gain adjustment;
the result output unit is used for exporting the table and outputting the analysis report.
5. The railway subgrade ground penetrating radar data processing system of claim 4,
the table derived by the result output unit comprises an uplink defect list, a downlink defect list and defect properties;
outputting single-channel display and multi-channel display in an analysis report:
the output analysis report of the single-channel display comprises a defect data table of the current channel measuring point and all abnormal area bitmaps;
the output analysis report of the multi-channel display comprises: and (3) uniformly integrating multiple channels of defects, unifying starting and ending mileage, unifying starting depth and ending depth when more than two defect local areas are overlapped, outputting a defect data table and an abnormal area bitmap according to one defect, and indicating a channel corresponding to the defect in the defect data table and the abnormal area bitmap.
6. The system according to claim 1, wherein the horizon tracking module comprises a number of levels determining unit, an automatic layering unit;
the layer number determining unit is used for selecting the layer number which needs to be determined currently;
and the automatic layering unit is used for finishing automatic layering of the track foundation data according to the determined layer number and the input starting depth and the input ending depth.
7. A railway subgrade ground penetrating radar data processing method, based on any one of claims 1 to 6, characterized by comprising the following steps:
s1, data processing; determining a proper frequency range of band-pass filtering, completing digital filtering and whole-course background filtering, and analyzing the characteristics of waveforms at the defect position, the bridge position and the tunnel position;
s2, mileage correction; determining the mileage corresponding to each spectral line according to the processed data, correcting the mileage corresponding to each path in the data through a bridge with known center position and length, carrying out normalization check, generating a data file containing mileage information after meeting the normalization check, and marking the positions of the bridge and the tunnel;
s3, automatic analysis; selecting data under a plurality of sub paths to carry out automatic abnormal area analysis to obtain a primary abnormal area analysis result;
s4, analyzing abnormal areas; and (4) combining the preliminary abnormal area analysis result, skipping the bridge and the tunnel according to the known positions of the bridge and the tunnel, and analyzing the abnormal area of the data of the measuring points at the left side, the center and the right side of the track to obtain the type of the abnormal area, the initial spectral line position, the cutoff spectral line position, the initial depth and the cutoff depth of the abnormal area, so as to obtain the abnormal area analysis result.
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