CN115494545A - Seismic wave identification system and method - Google Patents

Abstract

The present disclosure presents a seismic wave identification system and method. The seismic wave identification system comprises: the device comprises vibration sensing equipment, signal sampling equipment and an upper computer, wherein the signal sampling equipment is respectively connected with the vibration sensing equipment and the upper computer, and the vibration sensing equipment is used for detecting seismic waves, generating a first current signal according to the detected seismic waves and sending the first current signal to the signal sampling equipment; and the signal sampling equipment is used for converting the first current signal into a first voltage signal and sending the first voltage signal to the upper computer, and the upper computer is used for identifying seismic waves according to the first voltage signal. The seismic wave recognition system has the characteristic of strong anti-interference capability in the signal transmission process, thereby realizing the signal transmission with long distance and high signal-to-noise ratio and further improving the accuracy of seismic wave recognition.

Description

Seismic wave identification system and method

technical field

The present disclosure relates to the field of communication technologies, and in particular to a seismic wave identification system and method.

Background technique

Under the action of dynamic and static load stress, the coal rock mass produces stress concentration and then ruptures. After the coal rock mass ruptures, it may cause a series of major disasters such as roof collapse, mine water inrush, coal and gas outburst, and rock burst. Therefore, it is necessary to dynamically monitor the seismic waves generated after the coal-rock mass ruptures, so as to analyze the rupture position and the released energy of the coal-rock mass according to the seismic waves, and analyze and warn the possible dynamic disasters.

Usually, sensors for monitoring seismic waves are installed underground in coal mines, and the sensors need to be transmitted to the ground to identify the seismic waves based on the signals generated by the seismic waves, so as to analyze the rupture location of the coal rock mass and the energy released. However, the transmission distance of the signal is often long, and in the process of signal transmission, it is easily interfered by underground electromagnetic and various background vibration sources.

In the prior art, the anti-interference ability of signal transmission is weak. In the case of long-distance signal transmission, it is difficult to ensure the signal-to-noise ratio of the signal, so it is difficult to ensure the accuracy of subsequent seismic wave recognition. In this case, the transmission distance of the signal is relatively short, and it is difficult to meet the needs of long-distance signal transmission.

Contents of the invention

Embodiments of the present disclosure provide a seismic wave identification system and method, which solves the problem that in the prior art, the anti-interference ability of signal transmission is weak, and in the case of long-distance signal transmission, it is difficult to ensure the signal-to-noise ratio of the signal, so that it is difficult to ensure the follow-up The problem of the accuracy of seismic wave identification, and the problem that the transmission distance of the signal is relatively short under the condition of ensuring the signal-to-noise ratio of the signal, which makes it difficult to meet the needs of long-distance signal transmission.

The embodiment of the first aspect of the present disclosure proposes a seismic wave recognition system, including a vibration sensing device, a signal sampling device, and a host computer, and the signal sampling device is respectively connected to the vibration sensing device and the host computer, wherein, The vibration sensing device is used to detect seismic waves, and generate a first current signal according to the detected seismic waves, and send the first current signal to the signal sampling device; the signal sampling device is used to convert the The first current signal is converted into a first voltage signal, and the first voltage signal is sent to the host computer, and the host computer is used to identify the seismic wave according to the first voltage signal.

The seismic wave identification system of the embodiment of the present disclosure has the characteristics of strong anti-interference ability during signal transmission, thereby realizing long-distance and high signal-to-noise ratio signal transmission, thereby improving the accuracy of seismic wave identification.

In one embodiment of the present disclosure, the vibration sensing device includes a wave detector and a signal converter, the wave detector is connected to the signal converter, and the signal converter is also connected to the signal sampling device, wherein , the geophone is used to detect seismic waves, and generates a second voltage signal according to the detected seismic waves, and sends the second voltage signal to the signal converter; the signal converter is used to convert the The second voltage signal is converted into the first current signal.

In one embodiment of the present disclosure, the signal converter includes an impedance matching unit, a signal raising unit and a signal converting unit, the signal raising unit is respectively connected to the impedance matching unit and the signal converting unit, and the impedance The matching unit is also connected to the detector, wherein the impedance matching unit is used to perform low impedance processing on the second voltage signal to obtain a third voltage signal; the signal raising unit is used to perform low impedance processing on the second voltage signal; The three voltage signals are subjected to voltage boost processing to obtain a fourth voltage signal; the signal conversion unit is configured to convert the fourth voltage signal into the first current signal.

In an embodiment of the present disclosure, the signal sampling device includes a signal conditioner and a signal sampler, the signal conditioner is connected to the signal sampler, and the signal conditioner is also connected to the signal conversion unit, The signal sampler is also connected to the host computer, wherein the signal conditioner is used to convert the first current signal into a fifth voltage signal and send it to the signal sampler; the signal sampler The device is configured to perform sampling processing on the fifth voltage signal to obtain the first voltage signal, and send the first voltage signal to the upper computer.

In an embodiment of the present disclosure, the signal conditioner includes an interface protection unit, a current detection unit, a power control unit, a current-voltage conversion unit, a voltage translation unit, and a signal amplification unit, wherein the interface protection unit, the current detection unit Unit, power control unit, current-voltage conversion unit, voltage translation unit and signal amplification unit are connected sequentially, the interface protection unit is also connected to the signal conversion unit, and the signal amplification unit is also connected to the signal sampler; The interface protection unit is used to perform protection processing on the first current signal to obtain a second current signal; the current detection unit is used to detect whether the second current signal is abnormal; the power control unit uses When the second current signal is abnormal, stop transmitting the second current signal; the current-voltage conversion unit is configured to convert the second current signal when the second current signal is not abnormal into a sixth voltage signal; the voltage translation unit is configured to perform voltage translation processing on the sixth voltage signal to obtain a seventh voltage signal; the signal amplification unit is configured to amplify the seventh voltage signal processing to obtain the fifth voltage signal.

The embodiment of the second aspect of the present disclosure proposes a seismic wave identification method, which is executed by a seismic wave identification system. The method includes: detecting seismic waves, and generating a first current signal according to the detected seismic waves; converting the first current signal into a first voltage signal; identifying the seismic wave based on the first voltage signal.

In the embodiment of the present disclosure, the seismic wave is detected, and a first current signal is generated according to the detected seismic wave, the first current signal is converted into a first voltage signal, and the seismic wave is identified according to the first voltage signal. The embodiment of the present disclosure realizes signal transmission with strong anti-interference ability, long distance and high signal-to-noise ratio, improves signal quality, and thus improves the accuracy of seismic wave identification.

In an embodiment of the present disclosure, the generating the first current signal according to the detected seismic wave includes: generating a second voltage signal according to the detected seismic wave; converting the second voltage signal into the first current signal.

In an embodiment of the present disclosure, the converting the second voltage signal into the first current signal includes: performing low-impedance processing on the second voltage signal to obtain a third voltage signal; performing voltage boost processing on the third voltage signal to obtain a fourth voltage signal; converting the fourth voltage signal into the first current signal.

In an embodiment of the present disclosure, the converting the first current signal into a first voltage signal includes: converting the first current signal into a fifth voltage signal; sampling the fifth voltage signal processing to obtain the first voltage signal.

In an embodiment of the present disclosure, the identifying the seismic wave according to the first voltage signal includes: filtering the first voltage signal to obtain a first candidate seismic wave; The waveform within the set time window is selected as the second candidate seismic wave; the waveform before the seismic longitudinal wave takes off is selected from the second candidate seismic wave as the seismic wave.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Description of drawings

The above and/or additional aspects and advantages of the present disclosure will become apparent and understandable from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural diagram of a seismic wave identification system provided by an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another seismic wave identification system provided by an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of another seismic wave identification system provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another seismic wave identification system provided by an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of another seismic wave identification system provided by an embodiment of the present disclosure;

FIG. 6 is a schematic flow chart of a seismic wave identification method provided by an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart of another seismic wave identification method provided by an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart of another seismic wave identification method provided by an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart of another seismic wave identification method provided by an embodiment of the present disclosure;

FIG. 10 is a schematic flowchart of another seismic wave identification method provided by an embodiment of the present disclosure;

Fig. 11 is a schematic flowchart of another seismic wave identification method provided by an embodiment of the present disclosure.

detailed description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the disclosed embodiments as recited in the appended claims.

Terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only, and are not intended to limit the embodiments of the present disclosure. As used in the examples of this disclosure and the appended claims, the singular forms "a" and "the" are also intended to include the plural unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the embodiments of the present disclosure may use the terms first, second, third, etc. to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the embodiments of the present disclosure, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals designate like or similar elements throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present disclosure and should not be construed as limiting the present disclosure.

The seismic wave recognition system and method according to the embodiments of the present disclosure will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a seismic wave identification system provided by an embodiment of the present disclosure. As shown in FIG. 1 , the seismic wave identification system 100 includes a vibration sensing device 110 , a signal sampling device 120 and a host computer 130 , and the signal sampling device 120 is connected to the vibration sensing device 110 and the host computer 130 respectively.

Optionally, the vibration sensing device 110 may be a microseismic sensor.

Optionally, the vibration sensing device 110 and the signal sampling device 120 may be connected by a two-core transmission cable.

Optionally, the signal sampling device 120 is connected to the host computer 130 through a downhole ring network.

In the embodiment of the present disclosure, the vibration sensing device 110 is configured to detect seismic waves, generate a first current signal according to the detected seismic waves, and send the first current signal to the signal sampling device 120 .

Optionally, as shown in FIG. 2 , the vibration sensing device 110 includes a wave detector 111 and a signal converter 112 , the wave detector 111 is connected to the signal converter 112 , and the signal converter 112 is also connected to the signal sampling device 120 .

Wherein, the geophone 111 is used for detecting seismic waves, generating a second voltage signal according to the detected seismic waves, and sending the second voltage signal to the signal converter 112 .

Optionally, the detector 111 may be a moving coil detector.

The signal converter 112 is configured to convert the second voltage signal into the first current signal.

In some embodiments, the signal converter 112 can convert the second voltage signal output by the detector 111 into a first current signal of 4mA-20mA.

Optionally, as shown in FIG. 3 , the signal converter 112 includes an impedance matching unit 30, a signal raising unit 31 and a signal converting unit 32, the signal raising unit 31 is respectively connected to the impedance matching unit 30 and the signal converting unit 32, and the impedance matching unit 30 is also connected to the detector 111.

Wherein, the impedance matching unit 30 is configured to perform low-impedance processing on the second voltage signal to obtain a third voltage signal.

When the geophone 111 detects a seismic wave, the geophone 111 generates a second voltage signal according to the detected seismic wave, and sends the second voltage signal to the impedance matching unit 30 of the signal converter 112 .

After receiving the second voltage signal sent by the signal converter 112, the impedance matching unit 30 performs low-impedance processing on the second voltage signal to obtain a low-impedance third voltage signal, and sends the third voltage signal to the signal raising unit 31.

Wherein, the signal boosting unit 31 is configured to perform voltage boosting processing on the third voltage signal to obtain a fourth voltage signal.

After receiving the third voltage signal sent by the impedance matching unit 30 , the signal boosting unit 31 performs voltage boosting processing on the third voltage signal to obtain a fourth voltage signal, and sends the fourth voltage signal to the signal conversion unit 32 .

Wherein, the signal conversion unit 32 is configured to convert the fourth voltage signal into the first current signal.

In some embodiments, after receiving the fourth voltage signal sent by the signal raising unit 31, the signal conversion unit 32 converts the fourth voltage signal into a first current signal of 4mA-20mA, and sends the first current signal to Signal sampling device 120 .

In the embodiment of the present disclosure, the signal sampling device 120 is used to convert the first current signal into a first voltage signal, and send the first voltage signal to the host computer 130, and the host computer 130 is used to identify seismic waves according to the first voltage signal.

In some embodiments, after the signal sampling device 120 receives the first current signal sent by the signal converting unit 32 of the signal converter 112 of the vibration sensing device 110, it converts the first current signal into a first voltage signal, and passes the downhole The ring network sends the first voltage signal to the host computer 130 .

Optionally, as shown in FIG. 4, the signal sampling device 120 includes a signal conditioner 121 and a signal sampler 122, the signal conditioner 121 is connected to the signal sampler 122, the signal conditioner 122 is also connected to the signal conversion unit 32, and the signal sampling The device 122 is also connected with the host computer 130.

Wherein, the signal conditioner 121 is configured to convert the first current signal into a fifth voltage signal and send it to the signal sampler 122 .

In some embodiments, the signal conversion unit 32 of the signal converter 112 in the vibration sensing device 110 can send the first current signal of 4mA-20mA to the signal conditioner 121 of the signal sampling device 120, and the signal conditioner 121 receives the first current signal After receiving a current signal, the first current signal can be converted into a fifth voltage signal of ±5V, and the fifth voltage signal is sent to the signal sampler 122 .

Optionally, as shown in FIG. 5 , the signal conditioner 121 includes an interface protection unit 50, a current detection unit 51, a power control unit 52, a current-voltage conversion unit 53, a voltage translation unit 54, and a signal amplification unit 55, wherein the interface protection Unit 50, current detection unit 51, power control unit 52, current-voltage conversion unit 53, voltage translation unit 54 and signal amplifying unit 55 are sequentially connected, interface protection unit 50 is also connected with signal conversion unit 32, and signal amplifying unit 55 is also connected with signal The sampler 122 is connected.

Wherein, the interface protection unit 50 is configured to perform protection processing on the first current signal to obtain the second current signal.

In some embodiments, the signal conversion unit 32 of the signal converter 112 in the vibration sensing device 110 can send the first current signal of 4mA-20mA to the interface protection unit 50 of the signal conditioner 121 in the signal sampling device 120 . After receiving the first current signal, the interface protection unit 50 can absorb the transient high voltage caused by the first current signal, obtain a second current signal, and send the second current signal to the current detection unit 51 .

Wherein, the current detection unit 51 is configured to detect whether the second current signal is abnormal.

In some embodiments, the current detection unit 51 can detect whether the second current signal is abnormal in real time.

Wherein, the power control unit 52 is configured to stop transmitting the second current signal when the second current signal is abnormal.

In some embodiments, when the current detection unit 51 detects that the second current signal is abnormal, the power control unit 52 may perform shutdown processing to stop the transmission of the second current signal.

Wherein, the current-voltage conversion unit 53 is configured to convert the second current signal into a sixth voltage signal when the second current signal is not abnormal.

In some embodiments, when the current detection unit 51 does not detect that the second current is abnormal, the power control unit 52 does not perform shutdown processing, and the second current signal is normally transmitted. At this time, the current-voltage conversion unit 53 can convert the second current to The current signal is converted into a sixth voltage signal, and the sixth voltage signal is sent to the voltage translation unit 54 .

Wherein, the voltage translation unit 54 is configured to perform voltage translation processing on the sixth voltage signal to obtain a seventh voltage signal.

In some embodiments, after receiving the sixth voltage signal sent by the current-voltage conversion unit 53, the voltage translation unit 54 may perform voltage translation processing on the sixth voltage signal to obtain a seventh voltage signal, and send the seventh voltage signal to Signal amplifying unit 55 .

Wherein, the signal amplification unit 55 is configured to perform signal amplification processing on the seventh voltage signal to obtain the fifth voltage signal.

Optionally, the signal amplifying unit 55 may be a programmable gain amplifier (Programmable Gain Amplifier, PGA).

In some embodiments, after receiving the seventh voltage signal sent by the voltage translation unit 54, the signal amplifying unit 55 can perform signal amplification processing on the seventh voltage signal to obtain a fifth voltage signal of ±5V, and convert the fifth voltage signal to The signal is sent to a signal sampler 122 .

Wherein, the signal sampler 122 is configured to sample the fifth voltage signal to obtain the first voltage signal, and send the first voltage signal to the host computer 130 .

Optionally, the signal sampler 122 can sample the fifth voltage signal at a sampling rate greater than 5kSPS to obtain the first voltage signal, and send the first voltage signal to the host computer 130 through the downhole ring network, and the host computer 130 identifies seismic waves based on the first voltage signal.

Further, the signal sampling device 120 is also used to provide power for the vibration sensing device 110 .

The signal conditioner 121 in the signal sampling device 120 converts the first current signal provided by the shock sensing device 110 into a first voltage signal to transmit the signal, and at the same time, it can provide the vibration sensing device with the converted first voltage signal. 110 provides power.

In some embodiments, when the current detection unit 51 of the signal conditioner 121 in the signal sampling device 120 detects that the second current is abnormal, the power control unit 52 of the signal conditioner 121 is turned off, so that the signal conditioner 121 stops providing vibration transmission. The sensing device 110 provides power.

In some other embodiments, the current detection unit 51 can also detect whether the seismic wave identification system is short-circuited, and when a short-circuit is detected, the power control unit 52 is turned off to close the power channel protection circuit.

The seismic wave identification system of the embodiment of the present disclosure has the characteristics of strong anti-interference ability during signal transmission, thereby realizing long-distance and high signal-to-noise ratio signal transmission, thereby improving the accuracy of seismic wave identification.

Fig. 6 is a schematic flowchart of a seismic wave identification method provided by an embodiment of the present disclosure. It should be noted that the seismic wave identification method in the embodiment of the present disclosure is executed by a seismic wave identification system. As shown in Figure 6, the method includes the following steps:

S601. Detect seismic waves, and generate a first current signal according to the detected seismic waves.

The vibration sensing device can detect seismic waves in real time, and generate a first current signal according to the detected seismic waves, and then send the first current signal to the signal sampling device.

Optionally, the vibration sensing device generates a first current signal of 4mA-20mA according to the detected seismic wave.

S602. Convert the first current signal into a first voltage signal.

After receiving the first current signal sent by the shock sensor, the signal sampling device can convert the first current signal into a first voltage signal, and send the first voltage signal to the host computer.

Optionally, the signal sampling device converts the first current signal of 4mA-20mA into a first voltage signal of ±5V.

S603. Identify seismic waves according to the first voltage signal.

After receiving the first voltage signal sent by the signal sampling device, the upper computer identifies the seismic wave according to the first voltage signal.

In the embodiment of the present disclosure, the seismic wave is detected, and a first current signal is generated according to the detected seismic wave, the first current signal is converted into a first voltage signal, and the seismic wave is identified according to the first voltage signal. The embodiment of the present disclosure realizes signal transmission with strong anti-interference ability, long distance and high signal-to-noise ratio, improves signal quality, and thus improves the accuracy of seismic wave identification.

Fig. 7 is a schematic flowchart of a seismic wave identification method provided by an embodiment of the present disclosure. On the basis of the above embodiment, further combining with Fig. 7, the process of generating the first current signal according to the detected seismic wave is explained, including the following steps :

S701. Generate a second voltage signal according to the detected seismic wave.

The geophone in the signal sampling device can detect seismic waves in real time, and generate a second voltage signal according to the detected seismic waves, and then send the second voltage signal to the signal converter of the signal sampling device.

S702. Convert the second voltage signal into a first current signal.

After receiving the second voltage signal sent by the wave detector, the signal converter converts the second voltage signal into a first current signal.

Optionally, the signal converter converts the second voltage signal into a first current signal of 4mA-20mA.

In the embodiment of the present disclosure, the second voltage signal is generated according to the detected seismic wave, and the second voltage signal is converted into the first current signal. The embodiments of the present disclosure can convert the voltage signal generated by the geophone in the vibration sensing device according to the seismic wave into a current signal.

Fig. 8 is a schematic flowchart of a seismic wave identification method provided by an embodiment of the present disclosure. On the basis of the above embodiment, further combining with Fig. 8, the process of converting the second voltage signal into the first current signal is explained, including the following step:

S801. Perform low-impedance processing on the second voltage signal to obtain a third voltage signal.

After the signal converter receives the second voltage signal sent by the detector, the impedance matching unit in the signal converter performs low-impedance processing on the second voltage signal to obtain a third voltage signal, and sends the third voltage signal to the signal The voltage step-up unit of the converter.

S802. Perform voltage boost processing on the third voltage signal to obtain a fourth voltage signal.

After receiving the third voltage signal sent by the impedance matching unit, the voltage raising unit performs voltage raising processing on the third voltage signal to obtain a fourth voltage signal, and sends the fourth voltage signal to the signal converting unit of the signal converter.

S803. Convert the fourth voltage signal into a first current signal.

After receiving the fourth voltage signal sent by the voltage raising unit, the signal conversion unit converts the fourth voltage signal into the first current signal.

Optionally, the signal conversion unit converts the fourth voltage signal into the first current signal of 4mA-20mA.

In the embodiment of the present disclosure, low-impedance processing is performed on the second voltage signal to obtain a third voltage signal, voltage boost processing is performed on the third voltage signal to obtain a fourth voltage signal, and the fourth voltage signal is converted into the first current signal. In this embodiment, in the process of converting the voltage signal generated by the geophone in the vibration sensing device according to the seismic wave into a current signal, the impedance can be reduced, the voltage can be raised, and the signal quality can be guaranteed.

Fig. 9 is a schematic flowchart of a seismic wave identification method provided by an embodiment of the present disclosure. On the basis of the above embodiment, further combining with Fig. 9, the process of converting the first current signal into the first voltage signal is explained, including the following step:

S901. Convert the first current signal into a fifth voltage signal.

The signal conversion unit in the signal converter can send the first current signal to the signal conditioner of the signal sampling device, and the signal conditioner converts the first current into a fifth voltage signal after receiving the first current, and converts the fifth voltage The signal is sent to the signal sampler of the signal sampling device.

S902. Perform sampling processing on the fifth voltage signal to obtain a first voltage signal.

After receiving the fifth voltage signal sent by the signal conditioner, the signal sampler performs sampling processing on the fifth voltage signal to obtain the first voltage signal.

Optionally, the signal sampler may sample the fifth voltage signal at a sampling rate greater than 5 kSPS to obtain the first voltage signal.

In the embodiment of the present disclosure, the first current signal is converted into a fifth voltage signal, and the fifth voltage signal is sampled to obtain the first voltage signal. The embodiment of the present disclosure performs sampling processing on the signal to facilitate subsequent filtering processing on the signal so as to obtain high-quality seismic waves.

Fig. 10 is a schematic flowchart of a seismic wave identification method provided by an embodiment of the present disclosure. On the basis of the above embodiment, further combining with Fig. 10, the process of converting the first current signal into a fifth voltage signal is explained, including the following step:

S1001. Perform protection processing on the first current signal to obtain a second current signal.

After the signal conditioner of the signal sampling device receives the first current signal sent by the vibration sensing device, the interface protection unit in the signal sampling device can absorb the transient high voltage caused by the first current signal, thereby protecting the first current signal processing to obtain a second current signal, and send the second current signal to the current detection unit of the signal conditioner.

S1002. Detect whether the second current signal is abnormal.

After receiving the second current signal sent by the interface protection unit, the current detection unit can detect whether the second current is abnormal in real time.

S1003. When the second current signal is not abnormal, convert the second current signal into a sixth voltage signal.

When the current detection unit detects that there is no abnormality in the second current signal, the current-voltage conversion unit of the signal conditioner can convert the second current signal into a sixth voltage signal, and send the sixth voltage signal to the signal conditioner Voltage translation unit.

As a possible situation, when the current detection unit detects that the second current signal is abnormal, the power control unit of the signal conditioner performs shutdown processing to stop the transmission of the second current signal.

S1004. Perform voltage translation processing on the sixth voltage signal to obtain a seventh voltage signal.

After the voltage translation unit receives the sixth voltage signal sent by the current-voltage conversion unit, it performs voltage translation processing on the sixth voltage signal to obtain a seventh voltage signal, and sends the seventh voltage signal to the signal amplifying unit of the signal conditioner .

S1005. Perform signal amplification processing on the seventh voltage signal to obtain a fifth voltage signal.

After receiving the seventh voltage signal sent by the voltage translation unit, the signal amplifying unit performs signal amplification processing on the seventh voltage signal to obtain a fifth voltage signal.

Optionally, the signal amplifying unit amplifies the seventh voltage signal into a fifth voltage signal of ±5V.

In the embodiment of the present disclosure, the protection processing is performed on the first current signal to obtain the second current signal, and it is detected whether the second current signal is abnormal, and when the second current signal is not abnormal, the second current signal is converted into a sixth voltage signal, performing signal amplification processing on the seventh voltage signal to obtain a fifth voltage signal. In the embodiment of the present disclosure, the protection processing is performed on the signal, which can prevent the system from malfunctioning, and the amplification processing is performed on the signal, which can improve the signal quality.

Fig. 11 is a schematic flowchart of a seismic wave identification method provided by an embodiment of the present disclosure. On the basis of the above embodiment, further combining with Fig. 11, the process of identifying seismic waves according to the first voltage signal is explained, including the following steps:

S1101. Perform filtering processing on the first voltage signal to obtain a first candidate seismic wave.

After the host computer receives the first voltage signal sent by the signal sampling device, it can filter the first voltage signal through a filtering algorithm to filter out the power frequency interference or background noise in the first voltage signal, and obtain the first candidate seismic wave .

Optionally, the filtering algorithm includes low-pass filtering, high-pass filtering, power frequency filtering and the like.

S1102. Select the waveform within the set time window from the first candidate seismic wave as the second candidate seismic wave.

Wherein, the setting time window refers to a set time interval, and the setting time window can be set according to actual needs, without any limitation here, for example, the setting time window can be 2 seconds.

After filtering the first voltage signal to obtain the first candidate seismic wave, the waveform within the set time window can be selected from the first candidate seismic wave as the second candidate seismic wave according to requirements.

S1103. Select the waveform before the take-off of the longitudinal seismic wave from the second candidate seismic wave as the seismic wave.

After the waveform within the set time window is selected from the first candidate seismic wave as the second candidate seismic wave, the waveform before the seismic longitudinal wave take-off can be selected from the second candidate seismic wave as the seismic wave, which can be used to analyze the rupture of coal and rock mass location and energy released.

Furthermore, after the seismic wave is acquired, frequency analysis can be performed on the seismic wave, the characteristic frequency can be recorded, and the characteristic frequency can be used to filter the first voltage signal, so as to further improve the filtering effect.

In the embodiment of the present disclosure, the first voltage signal is filtered to obtain the first candidate seismic wave, the waveform within the set time window is selected from the first candidate seismic wave as the second candidate seismic wave, and the seismic longitudinal wave is selected from the second candidate seismic wave The waveform before take-off serves as a seismic wave. The embodiments of the present disclosure improve the accuracy of seismic wave identification, so that the rupture position and released energy of coal and rock mass can be accurately analyzed according to the seismic wave, and then analysis and early warning for possible dynamic disasters can be performed.

In the description of this specification, the terms "first" and "second" are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present disclosure, and those skilled in the art can understand the above-mentioned embodiments within the scope of the present disclosure. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. A seismic wave recognition system, characterized in that, comprises a vibration sensing device, a signal sampling device and a host computer, and the signal sampling device is connected with the vibration sensing device and the host computer respectively, wherein, The vibration sensing device is used to detect seismic waves, generate a first current signal according to the detected seismic waves, and send the first current signal to the signal sampling device; The signal sampling device is configured to convert the first current signal into a first voltage signal, and send the first voltage signal to the host computer, and the host computer is used to The seismic waves are identified. 2. The system according to claim 1, wherein the vibration sensing device comprises a wave detector and a signal converter, the wave detector is connected to the signal converter, and the signal converter is also connected to the The signal sampling device is connected where, The geophone is used to detect seismic waves, generate a second voltage signal according to the detected seismic waves, and send the second voltage signal to the signal converter; The signal converter is used to convert the second voltage signal into the first current signal. 3. The system according to claim 2, wherein the signal converter comprises an impedance matching unit, a signal raising unit and a signal converting unit, and the signal raising unit is respectively connected with the impedance matching unit and the signal converting unit. The unit is connected, and the impedance matching unit is also connected with the detector, wherein, The impedance matching unit is configured to perform low-impedance processing on the second voltage signal to obtain a third voltage signal; The signal raising unit is configured to perform voltage raising processing on the third voltage signal to obtain a fourth voltage signal; The signal conversion unit is configured to convert the fourth voltage signal into the first current signal. 4. The system according to claim 3, wherein the signal sampling device comprises a signal conditioner and a signal sampler, the signal conditioner is connected to the signal sampler, and the signal conditioner is also connected to the signal conditioner The signal conversion unit is connected, and the signal sampler is also connected to the host computer, wherein, The signal conditioner is configured to convert the first current signal into a fifth voltage signal and send it to the signal sampler; The signal sampler is configured to sample the fifth voltage signal to obtain the first voltage signal, and send the first voltage signal to the host computer. 5. The system according to claim 4, wherein the signal conditioner comprises an interface protection unit, a current detection unit, a power control unit, a current-voltage conversion unit, a voltage translation unit and a signal amplification unit, wherein the The interface protection unit, the current detection unit, the power control unit, the current-voltage conversion unit, the voltage translation unit and the signal amplification unit are sequentially connected, the interface protection unit is also connected to the signal conversion unit, and the signal amplification unit is also connected to the Signal sampler connection; The interface protection unit is configured to perform protection processing on the first current signal to obtain a second current signal; The current detection unit is configured to detect whether the second current signal is abnormal; The power control unit is configured to stop transmitting the second current signal when the second current signal is abnormal; The current-voltage conversion unit is configured to convert the second current signal into a sixth voltage signal when the second current signal is not abnormal; The voltage translation unit is configured to perform voltage translation processing on the sixth voltage signal to obtain a seventh voltage signal; The signal amplification unit is configured to perform signal amplification processing on the seventh voltage signal to obtain the fifth voltage signal. 6. A seismic wave identification method, characterized in that, performed by a seismic wave identification system, said method comprising: detecting seismic waves, and generating a first current signal according to the detected seismic waves; converting the first current signal into a first voltage signal; The seismic wave is identified based on the first voltage signal. 7. The method according to claim 6, wherein said generating the first current signal according to the detected seismic wave comprises: generating a second voltage signal according to the detected seismic waves; converting the second voltage signal into the first current signal. 8. The method according to claim 7, wherein said converting said second voltage signal into said first current signal comprises: performing low-impedance processing on the second voltage signal to obtain a third voltage signal; performing voltage boost processing on the third voltage signal to obtain a fourth voltage signal; converting the fourth voltage signal into the first current signal. 9. The method according to claim 6, wherein said converting said first current signal into a first voltage signal comprises: converting the first current signal into a fifth voltage signal; Sampling the fifth voltage signal to obtain the first voltage signal. 10. The method according to claim 6, wherein the identifying the seismic wave according to the first voltage signal comprises: performing filtering processing on the first voltage signal to obtain a first candidate seismic wave; selecting a waveform within a set time window from the first candidate seismic wave as a second candidate seismic wave; The waveform before the take-off of the seismic longitudinal wave is selected from the second candidate seismic wave as the seismic wave.

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