CN112162313A - High-speed rail earthquake high-frequency signal monitoring system and method - Google Patents
High-speed rail earthquake high-frequency signal monitoring system and method Download PDFInfo
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- CN112162313A CN112162313A CN202011102146.9A CN202011102146A CN112162313A CN 112162313 A CN112162313 A CN 112162313A CN 202011102146 A CN202011102146 A CN 202011102146A CN 112162313 A CN112162313 A CN 112162313A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/22—Transmitting seismic signals to recording or processing apparatus
- G01V1/223—Radioseismic systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/22—Transmitting seismic signals to recording or processing apparatus
- G01V1/226—Optoseismic systems
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Abstract
The invention provides a high-speed rail earthquake high-frequency signal monitoring system, and relates to the technical field of high-speed rail earthquake signal monitoring. The broadband detector is applied to a high-speed rail earthquake high-frequency signal monitoring system, so that the problem of high-frequency data distortion caused by the acquisition of high-speed rail earthquake signals based on a conventional detector is solved, and the data acquisition accuracy is improved; meanwhile, based on the high-speed rail earthquake high-frequency signal monitoring method that the detectors are respectively arranged on the surface of the area in a certain range under the bridge and on the two sides of the bridge, through carrying out contrastive analysis on the signals collected in different areas, the background noise doped in the high-speed rail earthquake monitoring data can be identified and filtered, and the resolution of the high-speed rail earthquake data is improved.
Description
Technical Field
The invention relates to the technical field of high-speed rail seismic signal monitoring, in particular to a high-speed rail seismic high-frequency signal monitoring system and method.
Background
The seismic exploration of the high-speed rail is a geophysical exploration method which utilizes the difference of the propagation of seismic waves excited by the high-speed rail running in different shallow earth surfaces and underground media, utilizes a detector to collect seismic signals of the high-speed rail at a monitoring point, and processes and analyzes physical parameters such as the safety performance of a railway line engineering structure, the internal structure and the structure of the earth and the like.
At present, high-speed rail seismic signal monitoring is mostly completed by means of seismographs, and when the high-speed rail seismic signal monitoring device is used for monitoring high-frequency signals of high-speed rail seismic signals, the following technical problems exist:
the sampling frequency of a detector in a conventional seismograph is general, so that errors are easy to occur when the characteristics of high-speed rail seismic signals at key moments are accurately analyzed; the frequency response range of a conventional seismograph is limited (generally within 0-300 Hz), and when the frequency of a high-speed rail seismic signal is out of the frequency response range, acquired data are distorted, so that effective high-frequency data of high-speed rail seismic waves cannot be acquired based on the monitoring method; the conventional detector layout mode takes the collection of a target signal as a starting point, only samples the target signal wave, neglects the actual problem that background noise waves exist in the collection environment, and causes complex signal processing process and easy error generation.
Disclosure of Invention
Aiming at the problems of the high-speed rail seismic signal monitoring technology, the invention provides a high-speed rail seismic high-frequency signal monitoring system which can acquire high-speed rail seismic data and has higher accuracy, larger frequency range (0-1000 Hz) and higher resolution.
The high-speed rail earthquake high-frequency signal monitoring system comprises a broadband detector, a data transmission optical cable, a data processor, a data memory, DTU wireless terminal equipment and a signal analysis center. The high-speed rail earthquake high-frequency signal monitoring system monitors and collects original high-speed rail earthquake data on the ground or at a certain depth of a shallow earth surface through a broadband detector, the original high-speed rail earthquake data are transmitted to a data processor in a data packet mode, the processor decodes the original high-speed rail earthquake data packets, then high-speed rail earthquake data information after decoding processing is transmitted to a data memory, and the data are transmitted to a high-speed rail earthquake signal analysis center through DTU wireless terminal equipment after being stored and backed up.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-speed rail earthquake high-frequency signal monitoring method is characterized by comprising the following steps: the frequency and data accuracy of the collected high-speed rail seismic wave effective signals are improved by using a broadband detector with a larger frequency response range and a higher sampling frequency; the arrangement range of the broadband detector not only relates to a preset signal monitoring point in an experimental scheme, but also covers a certain area around a monitoring structure to be used for simultaneously monitoring a high-speed rail seismic signal and a background noise signal at an engineering structure so as to identify and eliminate the background noise wave doped in high-speed rail seismic monitoring data in the signal analysis process.
The high-speed rail earthquake high-frequency signal monitoring method comprises the following steps:
step 1, information data collection: a signal acquisition region is determined according to a high-speed rail earthquake research scheme, the running speed of a high-speed rail train in a certain interval range near the region and basic parameter information such as stratum soil physical and mechanical properties are collected, and the arrangement position and the arrangement mode of a detector are determined with reference to fig. 2.
And 4, analyzing signal characteristics: according to a preset research scheme, high-speed rail seismic data of a target frequency band are screened out in a signal analysis center, and related scientific research of high-speed rail seismic high-frequency signals is further developed.
The invention has the following beneficial effects:
the broadband detector is applied to the high-speed rail earthquake high-frequency signal monitoring system, so that the high-speed rail earthquake data can be acquired at a higher sampling frequency, and the data acquisition accuracy is improved; the broadband detector can be used for acquiring effective high-frequency high-speed rail seismic signals and providing data for high-frequency rail seismic signal analysis and research; the high-speed rail earthquake high-frequency signal monitoring method based on the wave detector arrangement mode can realize the identification and filtration of background noise doped in high-speed rail earthquake monitoring data during signal analysis, and improve the resolution of high-speed rail earthquake data.
Drawings
FIG. 1 is a schematic diagram of a high-speed rail earthquake high-frequency signal monitoring system provided by the invention;
FIG. 2 is a reference diagram of the arrangement of detectors in the high-speed rail seismic high-frequency signal monitoring provided by the invention;
in FIG. 1, 1 is a broadband detector, 2 is a measuring line, 3 is a data transmission optical cable, 4 is a signal analysis center, 5 is a data processor, 6 is a data memory and 7 is a DTU wireless terminal device;
in FIG. 2, 8-high-speed rail train, 9-track, 10-infrastructure, 2-line, 11-surface, 1-broadband detector.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1, the high-speed rail seismic high-frequency signal monitoring system monitors and acquires original high-speed rail seismic data at a certain depth on the ground or shallow ground through a broadband detector (1), and transmits the data to a data processor (5) in the form of a data packet, the processor decodes the original high-speed rail seismic data packet, transmits the decoded high-speed rail seismic data information to a data memory (6), and transmits the data to a high-speed rail seismic signal analysis center (4) through a DTU wireless terminal device (7) after data storage and backup.
As shown in figure 2, when the high-speed rail seismic signals of the earth surface below the bridge are collected, the broadband detectors (6) are arranged along the center measuring line (4) of the bridge pier (3) according to nonlinear intervals, and meanwhile, a plurality of detectors of the same type are also arranged in a certain range on the earth surfaces at two sides of the bridge and used for monitoring background noise signals acting on the detectors at the center line when the high-speed rail passes through.
Example high-speed rail seismic high-frequency signal monitoring was performed as follows.
Step 1, information data collection: a signal acquisition region is determined according to a high-speed rail earthquake research scheme, the running speed of a high-speed rail train in a certain interval range near the region and basic parameter information such as stratum soil physical and mechanical properties are collected, and the arrangement position and the arrangement mode of a detector are determined with reference to fig. 2.
And 4, analyzing signal characteristics: according to a preset research scheme, high-speed rail seismic data of a target frequency band are screened out in a signal analysis center, and related scientific research of high-speed rail seismic high-frequency signals is further developed.
Claims (2)
1. A high-speed rail earthquake high-frequency signal monitoring system and a method are characterized by comprising a broadband detector, a data transmission optical cable, a data processor, a data memory, DTU wireless terminal equipment and a signal analysis center; the high-speed rail earthquake high-frequency signal monitoring system monitors and collects original high-speed rail earthquake data on the ground or at a certain depth of the shallow ground surface through a broadband detector, the original high-speed rail earthquake data are transmitted to a data processor in the form of data packets, the processor decodes the original high-speed rail earthquake data packets, then transmits the high-speed rail earthquake data information after decoding processing to a data memory, and the data are transmitted to a high-speed rail earthquake signal analysis center through DTU wireless terminal equipment after being stored and backed up.
2. The high-speed rail seismic high-frequency signal monitoring system according to claim 1, wherein the method of use comprises the steps of:
step 1: data gathering
According to a specific high-speed rail earthquake research scheme, a signal acquisition region is determined, the running speed of a high-speed rail train in a certain interval range near the region and basic parameter information such as stratum soil physical and mechanics are collected, and the spatial position and the arrangement mode of detectors are determined.
Step 2: instrument connection and debugging
And the detectors are arranged and connected with circuits such as optical cables and the like among the detectors, the data processor, the data memory and the DTU wireless terminal equipment, and the system is initially debugged after the power is switched on, so that the seismic signal acquisition system can be used for acquiring seismic signals of a high-speed rail after the system is normally operated.
And step 3: data monitoring and acquisition
The method comprises the steps of collecting, preprocessing and storing the seismic data of the high-speed rail within a certain time range before and after the high-speed rail train runs, and finally transmitting the seismic data to a signal analysis center.
And 4, step 4: signal feature analysis
According to a specific research target, high-speed rail seismic data of a target frequency band are screened out in a signal analysis center, and related scientific research of high-speed rail seismic high-frequency signals is further developed.
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| CN202011102146.9A CN112162313A (en) | 2020-10-15 | 2020-10-15 | High-speed rail earthquake high-frequency signal monitoring system and method |
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| CN202011102146.9A CN112162313A (en) | 2020-10-15 | 2020-10-15 | High-speed rail earthquake high-frequency signal monitoring system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113064198A (en) * | 2021-03-19 | 2021-07-02 | 辽宁工程技术大学 | Tunnel rail monitoring device based on third rail power supply and monitoring method thereof |
| CN113064199A (en) * | 2021-03-19 | 2021-07-02 | 辽宁工程技术大学 | Rail monitoring system and method for high-speed rail tunnel in operation period |
-
2020
- 2020-10-15 CN CN202011102146.9A patent/CN112162313A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113064198A (en) * | 2021-03-19 | 2021-07-02 | 辽宁工程技术大学 | Tunnel rail monitoring device based on third rail power supply and monitoring method thereof |
| CN113064199A (en) * | 2021-03-19 | 2021-07-02 | 辽宁工程技术大学 | Rail monitoring system and method for high-speed rail tunnel in operation period |
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