CN103278846B - Microseismograph, microseismic signals collection denoising method and microseismic signals acquisition method - Google Patents
Microseismograph, microseismic signals collection denoising method and microseismic signals acquisition method Download PDFInfo
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- CN103278846B CN103278846B CN201310218051.7A CN201310218051A CN103278846B CN 103278846 B CN103278846 B CN 103278846B CN 201310218051 A CN201310218051 A CN 201310218051A CN 103278846 B CN103278846 B CN 103278846B
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Abstract
A kind of microseismograph, including data acquisition module, control module, memory module, power module and wave detector, the wave detector for receiving microseismic signals is connected with data acquisition module, the data acquisition module pre-processed to microseismic signals is connected with control module, and the control module is connected with memory module；Described microseismograph also includes the GPS module for providing positioning and timing information, and the GPS module is connected with control module;The wave detector, which includes at least one set of vibrating sensor and at least one set, can perceive electric signal and can not perceive the electric signal sensor of vibration signal, the electric signal sensor has the electric property identical resistance of an electric property and vibrating sensor, and the data acquisition module includes the sampling channel interface no less than the vibrating sensor and electric signal sensor quantity sum.Electric noise interference can be effectively removed, signal to noise ratio is improved, is suitable for operation under the extreme climate environment of field.
Description
Technical field
The present invention relates to a kind of recorder, and in particular to a kind of monitoring the earth vibrations/fluctuation suitable for field work
Recorder.
Background technology
It is well known that microseismograph is a kind of instrument for being used to record vibrations/fluctuation, its function is by wave detector（I.e.
Sense the sensor of vibrations/fluctuation）The signal record that transmission comes is got off, and stores signal by predetermined record format requirement
The equipment come or be transferred to downstream.Recorder can be a kind of general equipment in itself.But due to record format requirement not
With different with the data content gathered（As frequency range is different）, so general recorder is difficult to meet specific needs.This
The microseismograph of invention, it is a kind of microseismograph for being used to monitor underground micro rupture and record microseism physical parameter.
For the target in space（Such as stealth aircraft, underground micro rupture）, it can be observed by monitoring battle array and send or reflect
Vibrations/fluctuation small-signal, and for some physical parameters after proper data is handled, target space division at any time can be obtained
The striograph of cloth.In existing oil-gas mining technology, due to natural formation or the energy of the underground micro rupture release of production induction
Amount is extremely faint, when earth's surface lays seismic network observation, is generally positioned without the image of Buddha larger in natural violent earthquake or artificial exploration
Explosion is such, and the ripple of extraction rupture first arrival carries out traditional positioning in wave recording, for this people usually cost of use it is high,
Geophone and recorder are laid in the well for hundreds of meters of the neighbouring rent that construction is complicated and restrictive condition is harsh, to implement
Observation and tradition positioning.In view of this, including the work of oil-gas mining, mining industry, urgent need research and development one kind can include microseism inspection in earth's surface laying
The micro seismic monitoring station of ripple device and microseismograph, use is simple and easy, the earth's surface observation method of economical and efficient implements break micro- to underground
The observation and positioning split.However, because the energy that the micro rupture of observed object discharges is extremely faint, it ruptures vibrations and passes to earth's surface
Microseismic activity it is extremely weak, so, more and miscellaneous interfering noises of earth's surface（The vibrations that such as vehicle, plant equipment are sent）Relative to micro-
The microseismic activity of rupture release seems extremely strong, and asking for microseismic signals can not be identified and extract from extremely strong interference signal so as to exist
Topic, this is also the main reason for existing earth's surface observation method is not yet successful.On the basis of lot of experiments research, applicant
The problem of existing earth's surface observation method is present is overcome, has grasped the accurate method in earth's surface monitoring underground micro rupture, and successfully
The technology of the micro rupture of goal-selling in the image of spatial distribution is shown, the technology includes：（A）Solves the visualizer of prior art
Device is not suitable for the problem of earth's surface micro seismic monitoring station, designs and manufactures the observation instrument suitable for the earth's surface micro seismic monitoring station,
Including microseismograph and microseism wave detector, these observation instruments should at least possess and can monitor and can record default mesh
Microseism ripple caused by target micro rupture, can filter out most of interfering noise, can be suitable for continuing under field and adverse circumstances it is steady
Surely the function of working 50 hours；（B）Solves the incorrect problem of data processing of prior art, finding correctly, effectively to be handled
The method of the data collected by the earth's surface micro seismic monitoring station, special computer digital animation software is developed, and can shown
The fracture shape of underground micro rupture and the distribution in space；（C）Find and meet earth's surface micro seismic monitoring station gathered data institute
It is required that field lay platform net method, avoid as far as possible surface noise interference and remove electrical Interference.
Existing microseismograph, mostly using part structures such as the additional analog input cards of computer system with operating system
Into, system is huge, and for operational efficiency than relatively low, power consumption is big, and battery capacity naturally also requires bigger, and in order to adapt to outer shroud out of office
Border being moved and transporting, and these instruments must be firm in structure, is caused totality heavier, is caused engineering cost to increase, instrument is removed
It is fragile in fortune, influence normal work.And existing record instrument does not have good denoising, an inherently noise comes
Source, the collection to the faint destruction signals in underground is not suitable for it.
The content of the invention
The defects of it is an object of the invention to overcome prior art, there is provided a kind of microseismograph, can effectively remove and make an uproar
Sound interference improves the signal to noise ratio of gathered data.And field autonomous working is further able to, adapts to the complicated working environment in field.
The purpose of the present invention is achieved through the following technical solutions：
A kind of microseismograph, including data acquisition module, control module, memory module, power module and wave detector, institute
The wave detector for stating reception microseismic signals is connected with data acquisition module, the data acquisition module pre-processed to microseismic signals
Block is connected with control module, and the control module is connected with memory module；Described microseismograph also include provide positioning and
The GPS module of timing information, the GPS module are connected with control module;The wave detector includes at least one set of vibrating sensor
Electric signal can be perceived with least one set and can not perceive the electric signal sensor of vibration signal, and the electric signal sensor has one
The electric property identical resistance of electric property and vibrating sensor, the data acquisition module include passing no less than the vibration
The sampling channel interface of sensor and electric signal sensor quantity sum.
Further, the wave detector is three-component geophone, including three groups of vibrating sensors and one group can perceive electric signal
And the electric signal sensor of vibration signal can not be perceived, the data acquisition module includes at least four sampling channel interface.
Further, the data acquisition module is provided with low pass filter, can suppress the intensity of signal of the frequency higher than 45Hz.
Further, the microseismograph also includes wireless communication module, and the wireless communication module connects with control module
Connect.
Further, the data acquisition module includes to amplify analog signal and being converted to the analog signal of data signal
Amplify collection plate.
Further, described data acquisition module sampling precision be 16 to 24, and sample rate up to 2000 times/
Second.
Further, the microseismograph uses the case structure for being adapted to field work, including by casing 71 and case lid 72
The instrument container 7 of the sealing formed is combined, the data acquisition module, control module, memory module, GPS module become one,
It is arranged on power module by flexible connecting structure in casing 71.
Further, the memory module is mobile memory card, and movement can be connected by, which being provided with the side walls of casing 71, deposits
The storage card base 51 of card storage and the protection door mechanism 6 of protection mobile memory card；The protection door mechanism 6 include flexible flap 61,
Gate seat 62, hinge arrangement 63, gate seat 62 are fixedly mounted on the casing 71 of the exsertion part of storage card base 51, and flexible flap 61 passes through
Hinge arrangement 63 is connected with gate seat 62；Under flexible flap 61 and the closure state of gate seat 62, gate seat 62, flexible flap 61 and casing
The sealed airspace 64 for the exposed parts for being used to accommodate storage card base 51 is provided between 71；In flexible flap 61 and the open shape of gate seat 62
The operating space 65 for being easy to human hand to intervene is provided with state, between gate seat 62 and flexible flap 61.
Present invention also offers a kind of microseismic signals to gather denoising method, including step：
（1）Receive and gathered through what data acquisition module treated from wave detector internal vibration sensor and electric signal sensor
Signal；
（2）By the mixed signal for including microseismic signals and electrical interference signal of vibrating sensor collection with passing through reverse electricity
The electrical interference Signal averaging of signal transducer collection can effectively remove electric noise.
Present invention also offers a kind of microseismic signals acquisition method, including step：
（1）Receive and gathered through what data acquisition module treated from wave detector internal vibration sensor and electric signal sensor
Signal；
（2）By the mixed signal for including microseismic signals and electrical interference signal of vibrating sensor collection with passing through reverse electricity
The electrical interference Signal averaging of signal transducer collection can effectively remove electric noise；
（3）The microseismic signals data that time dissemination system Greenwich absolute time tag based on GPS module is gathered
Time；
（4）The microseismic signals data marked with the time recorded in memory module.
Brief description of the drawings
Fig. 1 is the structured flowchart of microseismograph of the present invention.
Fig. 2 is the profile schematic perspective view of the embodiment of microseismograph of the present invention.
Fig. 3 is the structural representation of the embodiment of microseismograph shown in Fig. 2.
Fig. 4 is the appearance schematic diagram of the wave detector of microseismograph of the present invention.
Embodiment
As shown in figure 1, the microseismograph of the present invention, including data acquisition module, control module, memory module, power supply
Module and wave detector, the wave detector for receiving microseismic signals is connected with data acquisition module, described that microseismic signals are carried out in advance
The data acquisition module of processing is connected with control module, and the control module is connected with memory module；Described microseismograph
Also include the GPS module that positioning and timing information are provided, the GPS module is connected with control module.
The microseismograph of the present invention realizes longitude and latitude residing when micro seismic monitoring is carried out to microseismograph by GPS module
Degree and elevation accurately record, and utilize GPS time dissemination systems by GPS module, based on Greenwich absolute time tag institute
The time of the microseismic signals data of collection, GPS time service precisions reach 1.0E-7ms.High-precision timing function based on GPS module, makes
Monitoring Data subsequently based on more microseismographs record when carrying out analysis and realizing that underground ruptures point location, can be to data
Time-domain analysis is carried out to realize the synchronization of each microseismograph gathered data so that each microseismograph can work independently,
It need not network unified time.Above-mentioned longitude and latitude, elevation and GPS time service informations recorded storage mould after being handled by control module
In block.
The microseismograph of the present invention can also include wireless communication module, and the wireless communication module connects with control module
Connect.Based on wireless communication module, it is possible to achieve microseismograph controls with outside in the monitoring process of microseism or micro rupture
The communication of system, realize to the Real Time Observation of microseismograph background noise and working condition analyze with improve the laying of website and
Quality is monitored, the remote control to microseismograph is realized by external control system.Wireless telecommunications mould can certainly be passed through
Block passes the microseismic signals data gathered back external control system in real time, but because data volume is larger, it is steady based on wireless signal
The reason for qualitative difference is low with transmission rate, microseismic signals data firstly the need of record in a storage module.
In order to effectively reduce the noise jamming in microseismic signals collection, signal to noise ratio, microseismograph band of the invention are improved
There is noise reduction process function.Specifically, wave detector of the invention uses three-component geophone, including three groups of vibrating sensors, together
When also include one group can perceive electric signal and the electric signal sensor of vibration signal can not be perceived, the electric signal sensor has
The electric property identical resistance of one electric property and vibrating sensor, it is logical that the data acquisition module includes at least four sampling
Pipeline joint, data acquisition module wherein 4 sampling channel interfaces respectively with three groups of vibrating sensors and one group of electric signal sensor
Connection.When carrying out microseismic signals collection, instrument electromagnetic interference signal outwardly and inwardly and electrical crosstalk signal act on simultaneously
On this 4 groups of sensors, what caused electrical interference waveform looked like, connecing this of electric signal sensor, waveform can be recognized all the way
To be complete electrical interference waveform, other three roads waveform is the hybrid waveform of vibrational waveform and electrical interference waveform, uses hybrid waveform
Go superposition to pass through reverse electrical interference waveform, can effectively remove greatly electric interference, this method can letter
The denoising method that referred to as electric noise sampling is reversely superimposed.It is clear that being gathered based on different microseismic signals is needed, it is described
Wave detector only needs to include at least one set of vibrating sensor and at least one set of can perceive electric signal and can not perceive vibration signal
Electric signal sensor, electric property identical resistance of the electric signal sensor with an electric property and vibrating sensor are
The denoising method that electric noise sampling is reversely superimposed can be achieved.
Below in conjunction with accompanying drawing 2 to 4, an embodiment of the microseismograph of the present invention is further illustrated.
The profile of the microseismograph of the present invention is as shown in Fig. 2 microseismograph uses the box knot for being adapted to field work
Structure, including the instrument container 7 of the sealing formed is combined by casing 71 and case lid 72, described combination refers to pass through linkage（Such as
Conventional hinge）71 are connected with case lid 72 and is combined, is combined with forming the sealing between casing 71 and case lid 72, while also can be
Opened when needing.All components of machine and electronics of the installation microseismograph in addition to wave detector in the instrument container 7 of sealing
Device.Described sealing is combined, and instrument container 7 can be made to have preferable sealing property and be suitable for making under the extreme climate environment of field
Being easy to required by industry manually carries carrying, firm, impact resistance, the effect of waterproof and dustproof.One side of casing 71 is used as micro-
The guidance panel of seismic recorder, component of machine and electronic device necessary to man-machine cooperation are provided with this side, wherein
Including：Wave detector input socket 11, the storage card base 51 that mobile memory card can be connected, power switch 42, charging socket 43, LED
Indicator lamp 8.
The wave detector profile of microseismograph of the present invention then as shown in figure 4, the shell of wave detector is threaded column,
Microseismic signals monitoring is being carried out when embedded, is being matched using screw thread and diameter is slightly less than the brill of wave detector shell and drilled out perpendicular to the ground
One hole, then wave detector is screwed in hole, wave detector and hole wall is made tight fit, do not destroy the original density of earth's surface, do not destroy
The globality of soil property, reach the height coupling of wave detector and the earth, the validity of Monitoring Data can be greatly improved.Wave detector
Vibrating sensor and electric signal sensor are then fixedly mounted in wave detector cylindrical shell.
As shown in figure 3, a specific embodiment of the microseismograph of the present invention, described power module include battery case
41st, power switch 42 and charging socket；The memory module includes storage card base 51 and moveable storage card；Described control
Module includes the MCU control module 2 using ARM Series MCU chips；Described data acquisition module includes analog signal amplification and adopted
Collection plate 1, the wave detector input socket 11 being connected with analog signal amplification collection plate 1；Described wireless communication module includes wireless
Data transmission module 52 and connected data transmission antenna 53；Described GPS module is the GPS moulds with gps antenna 31
Block 3；The microseismograph of the present embodiment is additionally provided with pinboard 9, for MCU control module 2 and power switch 42, LED light
8th, the connection of storage card base 51.
The data acquisition module pretreatment of the present invention includes amplifying microseismic signals and converting analog signals into digital letter
Number export to control module.Data acquisition module can use the simulation letter that analog signal can be amplified to and is converted to data signal
Number amplification collection plate 1.Can also be the circuit for including signal amplifier and digital analog converter, the microseismic signals are amplified through signal
Device amplifies and is output to control module after digital analog converter is converted to data signal.In order to realize that the accurate of microseismic signals is adopted
Collection, described data acquisition module sampling precision should be 16 to 24, and sample rate can be achieved up to 2000 times/second
0.5ms, 1ms, 2ms, 4ms etc. different sample rates, sampling channel are preferably then 4 to 8.Frequency range based on microseismic signals,
The low pass filter that can suppress signal of the frequency higher than 45Hz can be also provided with the data acquisition module of the present invention, can be suppressed big
Interfering noise, particularly more than 45Hz vibrating noise are shaken in part, enable it to it is accurate, delicately sense 1-45Hz frequency models
Enclose interior seismic wave.Certainly, this is a kind of preferable scheme, because if being additionally arranged wave filter in wave detector, then
Wave filter can not be set in data acquisition module, but regardless of whether wave filter is provided with wave detector, is selected in data acquisition module
In set up wave filter and can play the effect that precautions averts perils, and double-smoothing can also increase jamproof effect.
To adapt to, field is carried and long-term work, control module of the invention are substituted logical using the ARM Series MCUs of low-power consumption
The computer system often used, without using general operating system, specific software is only run, overall power is low, and battery is held
Amount requires low, can mitigate battery weight significantly；It is adapted to wild environment moving and transport, and low in energy consumption to be potentially based on battery out of office
Outer continuously tens hours of work.
The data acquisition module of the present invention, control module, memory module, GPS module become one, when including channel radio
When interrogating module, wireless communication module can also integrate together.Make the microseism note of the present invention for the purposes of adapting to field work environment
Record instrument has good shockproof properties, and each module to become one and power module of microseismograph pass through flexible connection
Structure 100 is arranged in casing 71.Described flexible connecting structure 100 refers to one kind elastomeric material（Such as rubber, plastics）System
Into connecting elements, its profile matches with the inner chamber of casing 71 and is fixedly connected with casing 71, is provided with and holds on the connecting elements
Na dress includes each functional module of the present invention, the mounting structure of battery case 41, is connected with each other between part by flexible cord.Microseism is remembered
The critical piece and battery for recording instrument are fixed on cabinet without using screw, but use the packing method of flexible connection, close
Specific shape is processed into using soft rubber in joint sealing, circuit board and battery are embedded, is connected with each other using flexible cord, makes it
Reach best shockproof properties, can also mitigate weight, be advantageous to use and transport for long-distance under wild environment.The microseism note of the present invention
The pinboard 9 of record instrument is then fixedly mounted in casing 71, the storage card being fixedly connected with ensuring pinboard 9 with being arranged on casing 71
Seat 51, LED light 8, power switch 42 keep reliably electrically connecting, and the accident such as are particularly hit, shake in casing 71
In the case of still ensure that reliable electrical connection.Gps antenna 31, data transmission antenna 53 are installed in casing 71, but in order to keep away
Exempt from the screening effect of instrument container 7, a kind of scheme for preferably solving the problem is that described casing 71 and case lid 72 are used and be free of
The materials such as the engineering plastics of metal ingredient are made.
For the purposes of adapting to field work environment, the protection of protection mobile memory card is provided with the side walls of casing 71
Door mechanism 6, has dustproof and waterproof performance, easy to operation to be used suitable for wild environment.The protection door mechanism 6 includes elasticity
61, gate seat 62, hinge arrangement 63 are renovated, gate seat 62 is fixedly mounted on the casing 71 of the exsertion part of storage card base 51, and elasticity is turned over
Lid 61 is connected by hinge arrangement 63 with gate seat 62；Under flexible flap 61 and the closure state of gate seat 62, gate seat 62, flexible flap
The sealed airspace 64 for the exposed parts for being used to accommodate storage card base 51 is provided between 61 and casing 71；In flexible flap 61 and gate seat
The operating space 65 for being easy to human hand to intervene is provided with 62 open modes, between gate seat 62 and flexible flap 61.The guarantor that accompanying drawing provides
The embodiment of Hu Men mechanisms 6 is to be individually used for the situation of storage card base 51, but the protection door mechanism 6 applies also for being individually used for
The situation of power switch 42, or storage card base 51 and power switch 42 are used in conjunction with a protection door mechanism 6.
A series of above-mentioned technical schemes used based on the present invention, microseismograph of the invention can be removed effectively electrically
Noise jamming, signal to noise ratio is improved, is suitable for operation under the extreme climate environment of field.The microseismograph conjunction simple in construction of the present invention
Reason, specificity are strong, it is not necessary to general operating system, only run specific software, overall power is low, can greatly reduce battery
Volume and the weight for mitigating battery, can under conditions of the degree of environment temperature -20~+70, ambient humidity are not more than 95% normal work
Make more than 50 hours, small volume, it is in light weight, be easy to it is artificial carry carry, firm, impact resistance, it is more suitable the features such as waterproof and dustproof
Together in the operation of earth's surface monitoring micro rupture image technology under the extreme climate environment of field.
The control module of the present invention substitutes usually used computer system using the ARM Series MCUs of low-power consumption, without using
General operating system, specific software is only run, realize that microseismic signals gather, its function having includes：Using electrically making an uproar
The denoising method that sound sampling is reversely superimposed carries out denoising to the data of collection；Time dissemination system based on GPS module uses Green
Prestige controls the time for the microseismic signals data that absolute time tag is gathered；The microseismic signals data marked with the time recorded
In memory module；The microseismic signals data with time mark of collection are sent into outflow with wireless communication module.Described goes
Processing step of making an uproar includes,（1）Receive and passed through what data acquisition module treated from wave detector internal vibration sensor and electric signal
The signal of sensor collection；（2）Vibrating sensor collection is included into microseismic signals and the mixed signal and process of electrical interference signal
The electrical interference Signal averaging of reverse electric signal sensor collection can effectively remove electric noise, obtain effective microseismic signals.
Above content is to combine specific preferred embodiment explanation made for the present invention, it is impossible to assert the tool of the present invention
Body is implemented to be confined to these explanations.For those skilled in the art, original of the invention is not being departed from
On the premise of reason and design, some simple deduction or replace can be also made, are regarded as belonging to protection scope of the present invention.
Claims (10)
1. a kind of microseismograph, including data acquisition module, control module, memory module, power module and wave detector, it is special
Sign is：
The wave detector for receiving microseismic signals is connected with data acquisition module, the data pre-processed to microseismic signals
Acquisition module is connected with control module, and the control module is connected with memory module；
Described microseismograph also includes the GPS module for providing positioning and timing information, and the GPS module connects with control module
Connect；
The wave detector, which includes at least one set of vibrating sensor and at least one set, can perceive electric signal and can not perceive vibration signal
Electric signal sensor, the electric signal sensor has the electric property identical electricity of an electric property and vibrating sensor
Resistance, the data acquisition module include connecing no less than the sampling channel of the vibrating sensor and electric signal sensor quantity sum
Mouthful；The signal of vibrating sensor collection can effectively be gone with the electrical interference Signal averaging gathered by reverse electric signal sensor
Except electric noise.
2. microseismograph according to claim 1, it is characterised in that：The wave detector is three-component geophone, including
Three groups of vibrating sensors and one group can perceive electric signal and can not perceive the electric signal sensor of vibration signal, the data acquisition
Module includes at least four sampling channel interface.
3. microseismograph according to claim 1, it is characterised in that：The data acquisition module is provided with LPF
Device, the intensity of signal of the frequency higher than 45Hz can be suppressed.
4. microseismograph according to claim 1, it is characterised in that：The microseismograph also includes wireless telecommunications mould
Block, the wireless communication module are connected with control module.
5. microseismograph according to claim 1, it is characterised in that：The data acquisition module includes that simulation can be believed
Number amplify and be converted to the analog signal amplification collection plate of data signal.
6. microseismograph according to claim 1, it is characterised in that：Described data acquisition module sampling precision is 16
Position is to 24, and sample rate is up to 2000 times/second.
7. microseismograph according to claim 1, it is characterised in that：The microseismograph is using suitable field work
Case structure, include the instrument container (7) of sealing formed by casing (71) and case lid (72) combination,
The data acquisition module, control module, memory module, GPS module become one, and power module passes through flexibility
Attachment structure is arranged in casing (71).
8. microseismograph according to claim 7, it is characterised in that：The memory module is mobile memory card, in institute
State casing (71) side walls and be provided with the storage card base (51) that can connect mobile memory card and the protection door for protecting mobile memory card
Mechanism (6)；
The protection door mechanism (6) includes flexible flap (61), gate seat (62), hinge arrangement (63), and gate seat (62) is fixedly mounted
On the casing (71) of storage card base (51) exsertion part, flexible flap (61) is connected by hinge arrangement (63) and gate seat (62)
Connect；Under flexible flap (61) and gate seat (62) closure state, it is provided between gate seat (62), flexible flap (61) and casing (71)
For the sealed airspace (64) for the exposed parts for accommodating storage card base (51)；In flexible flap (61) and gate seat (62) open mode
Under, the operating space (65) for being easy to human hand to intervene is provided between gate seat (62) and flexible flap (61).
9. a kind of microseismic signals gather denoising method, it is characterised in that including step：
(1) letter gathered from wave detector internal vibration sensor and electric signal sensor treated through data acquisition module is received
Number；
(2) by the mixed signal for including microseismic signals and electrical interference signal of vibrating sensor collection with that can not feel by reverse
Electric noise can effectively be removed by knowing the electrical interference Signal averaging of the electric signal sensor collection of vibration signal.
10. a kind of microseismic signals acquisition method, it is characterised in that including step：
(1) letter gathered from wave detector internal vibration sensor and electric signal sensor treated through data acquisition module is received
Number；
(2) by the mixed signal for including microseismic signals and electrical interference signal of vibrating sensor collection with that can not feel by reverse
Electric noise can effectively be removed by knowing the electrical interference Signal averaging of the electric signal sensor collection of vibration signal；
(3) time for the microseismic signals data that the time dissemination system Greenwich absolute time tag based on GPS module is gathered；
(4) the microseismic signals data marked with the time recorded in memory module.
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