Underground micro-seismic signal acquisition and identification method and system

Abstract

The invention relates to the technical field of signal acquisition, in particular to an underground micro-seismic signal acquisition and identification method and system, which comprises a signal acquisition module, a signal screening module, a signal amplification module, a signal processing module and a signal analysis module. The signal processing module is used for receiving a vibration signal and transmitting the vibration signal to the signal screening module, so that the signal screening module can screen and judge the received vibration signal, and then the vibration signal is sequentially transmitted to the signal amplification module, the signal processing module and the signal analysis module after the vibration signal is judged to be a micro-vibration signal, and the micro-vibration signal is amplified, converted, filtered and analyzed. After the micro-seismic signal is analyzed and processed, a corresponding analysis result can be obtained, so that the interference signal existing in the collected micro-seismic signal can be identified and distinguished, and the micro-seismic signal can be accurately identified.

Description

Technical Field

[0001] The present invention relates to the technical field of signal acquisition, and in particular to an underground microseismic signal acquisition and identification method and system. Background Art

[0002] With the continuous development and progress of data acquisition technology, the application of microseismic signal monitoring technology has gradually increased, and it has been widely used in earthquake monitoring, mine safety production, oil field fracturing monitoring and tunnel safety construction monitoring. The existing microseismic signal acquisition and identification system has slow transmission speed and response speed and low reliability in terms of the time of early warning of microseismic occurrence.

[0003] The prior art CN202758078U discloses a microseismic signal acquisition system, which analyzes and processes data through a host computer, and then issues early warnings for accidents or natural disasters, thereby minimizing the losses caused by disasters. By adopting a JF-20DX-10Hz seismic detector, it has the advantages of high sensitivity and high speed, so that the acquisition system can collect and transmit a large amount of data, with fast transmission speed, sensitive response, and high reliability.

[0004] However, although the above-mentioned acquisition system can collect and analyze microseismic signals, it cannot identify and distinguish the interference signals existing in the collected microseismic signals, resulting in that the microseismic signals cannot be accurately identified. Summary of the invention

[0005] The purpose of the present invention is to provide an underground microseismic signal acquisition and identification method and system, which solves the technical problem that although the existing acquisition system can acquire and analyze microseismic signals, it cannot identify and distinguish the interference signals present in the acquired microseismic signals, resulting in the inability to accurately identify the microseismic signals.

[0006] To achieve the above-mentioned object, the present invention provides an underground microseismic signal acquisition and identification system, comprising a signal acquisition module, a signal screening module, a signal amplification module, a signal processing module and a signal analysis module, wherein the signal acquisition module, the signal screening module, the signal amplification module, the signal processing module and the signal analysis module are connected in sequence;

[0007] The signal acquisition module is used to collect various types of underground vibration signals and summarize them. After summarizing, all the collected vibration signals are sent to the signal screening module;

[0008] The signal screening module is used to screen and judge the received vibration signal according to the pre-stored judgment conditions. If the judgment conditions are met, the collected vibration signal is judged to be a microseismic signal and the microseismic signal is sent to the signal amplification module; otherwise, the collected vibration signal is judged to be an interference signal;

[0009] The signal amplification module is used to amplify the received microseismic signal and send the amplified microseismic signal to the signal processing module after amplification;

[0010] The signal processing module is used to perform analog-to-digital conversion and filtering processing on the received microseismic signal, and after the processing is completed, send the processed microseismic signal to the signal analysis module;

[0011] The signal analysis module is used to analyze and process the received microseismic signals and generate corresponding analysis results.

[0012] There are several signal acquisition modules, and each of the signal acquisition modules is sequentially connected to a signal amplification module and a signal processing module.

[0013] Wherein, the signal processing module includes a signal conversion unit and a signal filtering unit, and the signal conversion unit is connected to the signal filtering unit;

[0014] The signal conversion unit is used to perform multi-channel acquisition on the amplified microseismic signal to generate a corresponding digital signal;

[0015] The signal filtering unit is used to filter the received digital signal.

[0016] The underground microseismic signal acquisition and identification system further includes a display module, which is connected to the signal analysis module and is used to receive and display the analysis results of the signal analysis module.

[0017] The underground microseismic signal acquisition and identification system further includes a power supply module, which is connected to the signal acquisition module and is used to provide intelligent power supply for the entire acquisition and identification system.

[0018] Wherein, the power supply module includes a power supply and a power manager, and the power manager is connected to the power supply;

[0019] The power supply is used to supply power to the entire acquisition and identification system;

[0020] The power manager is used to intelligently manage the charging or discharging state of the power supply.

[0021] The present invention also provides an underground microseismic signal acquisition and identification method, comprising the following steps:

[0022] The signal acquisition module is used to collect various types of underground vibration signals and summarize them. After summarizing, all the collected vibration signals are sent to the signal screening module;

[0023] Afterwards, the signal screening module screens and judges the received vibration signal according to the pre-stored judgment conditions. If the judgment conditions are met, the vibration signal is judged to be a microseismic signal and the microseismic signal is sent to the signal amplification module; otherwise, the vibration signal is judged to be an interference signal;

[0024] After the signal amplification module receives the microseismic signal, the signal amplification module amplifies the microseismic signal, and after amplification, sends the amplified microseismic signal to the signal processing module;

[0025] After the signal processing module receives the microseismic signal, the signal processing module performs analog-to-digital conversion and filtering on the microseismic signal, and after the processing is completed, sends the processed microseismic signal to the signal analysis module;

[0026] The signal analysis module analyzes and processes the received microseismic signal and generates a corresponding analysis result, and then transmits the analysis result to the display module for display.

[0027] The present invention provides an underground microseismic signal acquisition and identification method and system, which acquires various types of underground vibration signals through the signal acquisition module, and transmits the acquired signals to the signal screening module, so that the signal screening module can screen and determine the received vibration signals, so that after the vibration signals are determined to be microseismic signals, they are sequentially transmitted to the signal amplification module, the signal processing module and the signal analysis module, so that the signal amplification module, the signal processing module and the signal analysis module can respectively amplify, convert, filter and analyze the microseismic signals, and obtain corresponding analysis results after the analysis and processing, so that the interference signals existing in the acquired microseismic signals can be identified and distinguished, so that the microseismic signals can be accurately identified, which solves the technical problem that the existing acquisition system can acquire and analyze the microseismic signals but cannot identify and distinguish the interference signals existing in the acquired microseismic signals, resulting in the inability to accurately identify the microseismic signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0029] Figure 1 It is a control principle diagram of the underground microseismic signal acquisition and identification system of the first embodiment of the present invention.

[0030] Figure 2 It is a flowchart of the underground microseismic signal acquisition and identification method according to the second embodiment of the present invention.

[0031] In the figure: 101-signal acquisition module, 102-signal screening module, 103-signal amplification module, 104-signal processing module, 105-signal analysis module, 106-display module, 107-power supply module, 108-signal conversion unit, 109-signal filtering unit, 110-power supply, 111-power manager. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0033] First embodiment:

[0034] See also Figure 1 , Figure 1 It is a control schematic diagram of an underground microseismic signal acquisition and identification system of the first embodiment of the present invention. The present invention provides an underground microseismic signal acquisition and identification system, including a signal acquisition module 101, a signal screening module 102, a signal amplification module 103, a signal processing module 104, a signal analysis module 105, a display module 106 and a power supply module 107. The signal processing module 104 includes a signal conversion unit 108 and a signal filtering unit 109, and the power supply module 107 includes a power supply 110 and a power supply manager 111.

[0035] In this embodiment, various types of vibration signals underground are collected by the signal acquisition module 101, and after collection, they are transmitted to the signal screening module 102, so that the signal screening module 102 can screen and determine the received vibration signals, so that after the vibration signal is determined to be a microseismic signal, it is transmitted to the signal amplification module 103, the signal processing module 104 and the signal analysis module 105 in sequence, so that the signal amplification module 103, the signal processing module 104 and the signal analysis module 105 can respectively amplify, convert, filter and analyze the microseismic signal, and obtain corresponding analysis results after analysis and processing, so that the interference signals existing in the collected microseismic signals can be identified and distinguished, so that the microseismic signals can be accurately identified, which solves the technical problem that the existing acquisition system can collect and analyze the microseismic signals, but cannot identify and distinguish the interference signals existing in the collected microseismic signals, resulting in the inability to accurately identify the microseismic signals.

[0036] The signal acquisition module 101, the signal screening module 102, the signal amplification module 103, the signal processing module 104 and the signal analysis module 105 are connected in sequence; the signal acquisition module 101 is used to collect various types of underground vibration signals and summarize them. After summarizing, all the collected vibration signals are sent to the signal screening module 102; the signal screening module 102 is used to screen and judge the received vibration signals according to the pre-stored judgment conditions. If the judgment conditions are met, the collected vibration signal is judged to be a microseismic signal, and the microseismic signal is sent to the signal screening module 102. The signal is sent to the signal amplification module 103; otherwise, the collected vibration signal is determined to be an interference signal; the signal amplification module 103 is used to amplify the received microseismic signal, and after amplification, the amplified microseismic signal is sent to the signal processing module 104; the signal processing module 104 is used to perform analog-to-digital conversion and filtering processing on the received microseismic signal, and after processing, the processed microseismic signal is sent to the signal analysis module 105; the signal analysis module 105 is used to analyze and process the received microseismic signal and generate corresponding analysis results.

[0037] Secondly, there are several signal acquisition modules 101 , each of which is connected to a signal amplification module 103 and a signal processing module 104 in sequence. The signal acquisition module 101 is a JF-20DX-10Hz seismic detector.

[0038] Again, the signal conversion unit 108 is connected to the signal filtering unit 109; the signal conversion unit 108 is used to perform multi-channel acquisition on the amplified microseismic signal to generate a corresponding digital signal; the signal filtering unit 109 is used to filter the received digital signal. The signal conversion unit 108 is an analog-to-digital conversion chip, and the signal filtering unit 109 is a digital filtering chip.

[0039] At the same time, the display module 106 is connected to the signal analysis module 105 to receive and display the analysis result of the signal analysis module 105 .

[0040] In addition, the power supply module 107 is connected to the signal acquisition module 101 and is used to provide intelligent power supply for the entire acquisition and recognition system.

[0041] Finally, the power manager 111 is connected to the power supply 110 ; the power supply 110 is used to supply power to the entire acquisition and identification system; the power manager 111 is used to intelligently manage the charging or discharging state of the power supply 110 .

[0042] When using an underground microseismic signal acquisition and identification system of the present embodiment, the power supply 110 is started to allow the power supply 110 to power the entire acquisition and identification system. During the power supply 110 supplying power, the power manager 111 is used to intelligently manage the charging or discharging state of the power supply 110. After that, various types of underground vibration signals are collected and summarized through the signal acquisition module 101. After the summary, all the collected vibration signals are sent to the signal screening module 102.

[0043] After the signal screening module 102 receives the collected vibration signal, the signal screening module 102 can screen and judge the received vibration signal according to the pre-stored judgment conditions. If the judgment conditions are met, the vibration signal is determined to be a microseismic signal, and the microseismic signal is sent to the signal amplification module 103; otherwise, the vibration signal is determined to be an interference signal, and no processing is performed on the interference signal.

[0044] After the signal amplifying module 103 receives the microseismic signal, the signal amplifying module 103 amplifies the microseismic signal and sends the amplified microseismic signal to the signal conversion unit 108 of the signal processing module 104 .

[0045] After the signal conversion unit 108 of the signal processing module 104 receives the microseismic signal, the signal conversion unit 108 performs multi-channel acquisition on the amplified microseismic signal and generates a corresponding digital signal. Thereafter, the signal conversion unit 108 transmits the digital signal to the signal filtering unit 109, so that the signal filtering unit 109 can filter the received digital signal and send the processed microseismic signal to the signal analysis module 105 after the processing is completed.

[0046] After the signal analysis module 105 receives the microseismic signal after filtering, the signal analysis module 105 will analyze and process the received microseismic signal and generate corresponding analysis results, and then transmit the analysis results to the display module 106, so that the display module 106 can display the received analysis results, completing the entire acquisition and identification process of the underground microseismic signal.

[0047] Second embodiment:

[0048] Based on the first embodiment, please refer to Figure 2 , Figure 2 1 is a flowchart of a method for collecting and identifying underground microseismic signals according to a second embodiment of the present invention. The present invention also provides a method for collecting and identifying underground microseismic signals, comprising the following steps:

[0049] S101 , using the signal acquisition module 101 to collect various types of underground vibration signals and summarize them. After summarizing, all the collected vibration signals are sent to the signal screening module 102 .

[0050] Specifically, the power supply 110 is started to supply power to the entire acquisition and identification system, and during the power supply 110 supplying power, the power manager 111 is used to intelligently manage the charging or discharging state of the power supply 110. Afterwards, various types of vibration signals underground are collected and summarized through the signal acquisition module 101. After the summary, all collected vibration signals are sent to the signal screening module 102.

[0051] S102. Afterwards, the signal screening module 102 screens and judges the received vibration signal according to the pre-stored judgment conditions. If the judgment conditions are met, the vibration signal is determined to be a microseismic signal and the microseismic signal is sent to the signal amplification module 103; otherwise, the vibration signal is determined to be an interference signal.

[0052] Specifically, after the signal screening module 102 receives the collected vibration signal, the signal screening module 102 can screen and judge the received vibration signal according to the pre-stored judgment conditions. If the judgment conditions are met, the vibration signal is determined to be a microseismic signal, and the microseismic signal is sent to the signal amplification module 103; otherwise, the vibration signal is determined to be an interference signal, and no processing is performed on the interference signal.

[0053] S103 , after the signal amplifying module 103 receives the microseismic signal, the signal amplifying module 103 amplifies the microseismic signal, and after amplification, sends the amplified microseismic signal to the signal processing module 104 .

[0054] Specifically, after the signal amplifying module 103 receives the microseismic signal, the signal amplifying module 103 amplifies the microseismic signal, and after amplification, sends the amplified microseismic signal to the signal conversion unit 108 of the signal processing module 104 .

[0055] S104 , after the signal processing module 104 receives the microseismic signal, the signal processing module 104 performs analog-to-digital conversion and filtering processing on the microseismic signal, and after processing, sends the processed microseismic signal to the signal analysis module 105 .

[0056] Specifically, after the signal conversion unit 108 of the signal processing module 104 receives the microseismic signal, the signal conversion unit 108 will perform multi-channel acquisition on the amplified microseismic signal and generate a corresponding digital signal. Thereafter, the signal conversion unit 108 will transmit the digital signal to the signal filtering unit 109, so that the signal filtering unit 109 can filter the received digital signal and send the processed microseismic signal to the signal analysis module 105 after the processing is completed.

[0057] S105 , the signal analysis module 105 analyzes and processes the received microseismic signal, generates a corresponding analysis result, and then transmits the analysis result to the display module 106 for display.

[0058] Specifically, after the signal analysis module 105 receives the microseismic signal after filtering, the signal analysis module 105 will analyze and process the received microseismic signal and generate corresponding analysis results, and then transmit the analysis results to the display module 106, so that the display module 106 can display the received analysis results, completing the entire acquisition and identification process of the underground microseismic signal.

[0059] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An underground microseismic signal acquisition and identification system, characterized by: It includes a signal acquisition module, a signal screening module, a signal amplification module, a signal processing module and a signal analysis module, wherein the signal acquisition module, the signal screening module, the signal amplification module, the signal processing module and the signal analysis module are connected in sequence; The signal acquisition module is used to collect various types of underground vibration signals and summarize them. After summarizing, all the collected vibration signals are sent to the signal screening module; The signal screening module is used to screen and judge the received vibration signal according to the pre-stored judgment conditions. If the judgment conditions are met, the collected vibration signal is determined to be a microseismic signal, and the microseismic signal is sent to the signal amplification module; Otherwise, the collected vibration signal is determined to be an interference signal; The signal amplification module is used to amplify the received microseismic signal and send the amplified microseismic signal to the signal processing module after amplification; The signal processing module is used to perform analog-to-digital conversion and filtering processing on the received microseismic signal, and after the processing is completed, send the processed microseismic signal to the signal analysis module; The signal analysis module is used to analyze and process the received microseismic signals and generate corresponding analysis results.

2. The underground microseismic signal acquisition and identification system according to claim 1, characterized in that: There are several signal acquisition modules, and each of the signal acquisition modules is sequentially connected to a signal amplification module and a signal processing module.

3. The underground microseismic signal acquisition and identification system according to claim 1, characterized in that: The signal processing module includes a signal conversion unit and a signal filtering unit, and the signal conversion unit is connected to the signal filtering unit; The signal conversion unit is used to perform multi-channel acquisition on the amplified microseismic signal to generate a corresponding digital signal; The signal filtering unit is used to filter the received digital signal.

4. The underground microseismic signal acquisition and identification system according to claim 1, characterized in that: The underground microseismic signal acquisition and identification system also includes a display module, which is connected to the signal analysis module and is used to receive and display the analysis results of the signal analysis module.

5. The underground microseismic signal acquisition and identification system according to claim 1, characterized in that: The underground microseismic signal acquisition and identification system further comprises a power supply module, which is connected to the signal acquisition module and is used to intelligently power the entire acquisition and identification system.

6. The underground microseismic signal acquisition and identification system according to claim 5, characterized in that: The power supply module includes a power supply and a power manager, and the power manager is connected to the power supply; The power supply is used to supply power to the entire acquisition and identification system; The power manager is used to intelligently manage the charging or discharging state of the power supply.

7. A method for collecting and identifying underground microseismic signals, applied to the underground microseismic signal collection and identification system according to any one of claims 1 to 6, characterized in that: The following steps are involved: The signal acquisition module is used to collect various types of underground vibration signals and summarize them. After summarizing, all the collected vibration signals are sent to the signal screening module; Afterwards, the signal screening module screens and judges the received vibration signal according to the pre-stored judgment conditions. If the judgment conditions are met, the vibration signal is determined to be a microseismic signal, and the microseismic signal is sent to the signal amplification module; Otherwise, it is determined that the vibration signal is an interference signal; After the signal amplification module receives the microseismic signal, the signal amplification module amplifies the microseismic signal, and after amplification, sends the amplified microseismic signal to the signal processing module; After the signal processing module receives the microseismic signal, the signal processing module performs analog-to-digital conversion and filtering on the microseismic signal, and after the processing is completed, sends the processed microseismic signal to the signal analysis module; The signal analysis module analyzes and processes the received microseismic signal and generates a corresponding analysis result, and then transmits the analysis result to the display module for display.

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