CN108761524A - A kind of portable tunnel seismic wave forward probe system and method - Google Patents
A kind of portable tunnel seismic wave forward probe system and method Download PDFInfo
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- CN108761524A CN108761524A CN201810489231.1A CN201810489231A CN108761524A CN 108761524 A CN108761524 A CN 108761524A CN 201810489231 A CN201810489231 A CN 201810489231A CN 108761524 A CN108761524 A CN 108761524A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/22—Transmitting seismic signals to recording or processing apparatus
- G01V1/223—Radioseismic systems
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Abstract
The invention discloses a kind of portable tunnel 3-D seismics seismic wave forward probe system and methods, it is installed on tunnel side wall using three-component geophone, the seismic wave waveform on tri- directions x/y/z is obtained, and a three-component geophone is correspondingly connected with a transmitter unit by wired mode；Transmitter unit is corresponded with receiving unit, the corresponding receiving unit group of different transmitter units is to being operated in different frequency range, for multiple receiving units by cascade, no maximum extension can be carried out by forming three-component geophone quantity, only need to increase corresponding transmitter unit and receiving unit；The present invention may be used in combination two kinds of seismic wave forward probe methods of active source and broken rock focus；The system has Time Synchronization Mechanism, can ensure that different three-component geophones measure the time consistency of seismic wave waveform to greatest extent.
Description
Technical field
The present invention relates to a kind of portable tunnel seismic wave forward probe system and methods.
Background technology
Such as tomography, crushed zone bad geological phenomenon are often met with during constructing tunnel, if cannot visit in advance
Bright tunnel tunnel face front whether there is unfavorable geologic body, it will lead to serious security risk, it is most likely that personnel is caused to hinder
It dies, construction delay and heavy economic losses.Therefore the unfavorable geologic body for verifying tunnel tunnel face front preservation in advance, for ensureing
Safety for tunnel engineering has a very important significance.
Seismic wave forward probe method have detection range far and can effectively verify front of tunnel heading preservation tomography and
The advantages of unfavorable geologic bodies such as crushed zone is one of method mostly important in tunnel geological forecast.Seismic wave is visited in advance
Survey method can be divided into two kinds of active source seismic wave forward probe method and broken rock focus seismic wave forward probe method, the former adopts
Manually focus (such as explosive, sledgehammer, super magnetic hysteresis flexible focus and hydraulic/pneumatic focus etc.) excites earthquake on tunnel side wall
Wave is detected；The vibration signal that the latter is generated when can directly be tunneled using rock tunnel(ling) machine detects, without passing through
Man-made explosion earthquake-wave-exciting.
There is some commercial lands/tunnel seismic wave detection system at present, but the main problems are as follows：
(1) for the detection system having using wired connection mode and centralized detection principle, arrangement detection cable work is time-consuming
Arduously, it is not easy to be detected under tunnel complex environment.
(2) detection system having can not be obtained only with simple component wave detector on tri- directions tunnel side wall x/y/z
Seismic wave waveform, and wave detector quantity is extremely limited to be extended, the form that can only increase acquisition terminal equipment realizes three
Component signal acquires, and inconvenient for use, data is caused to synchronize situation difficult, that equipment cost is high.
(3) internal storage space of most of detection system is extremely limited, can not carry out carrying out data acquisition for a long time, because
This only supports triggering collection pattern, is not used to broken rock focus seismic wave forward probe method.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that a kind of portable tunnel seismic wave forward probe system and method,
The advantages of it is light and handy convenient that the present invention has, and is easy to carry about with one, and storage does not take up space.
To achieve the goals above, the present invention adopts the following technical scheme that：
The first object of the present invention is to provide a kind of portable tunnel seismic wave forward probe system, including industrial personal computer, master
Unit, receiving unit, focus, transmitter unit and three-component geophone are controlled, wherein：
The three-component geophone is installed on tunnel side wall, can obtain the seismic wave waveform on tri- directions x/y/z, and
One three-component geophone is correspondingly connected with a transmitter unit by wired mode；The main control unit and each transmitter unit
Between wirelessly carry out data transmission；It is attached between the main control unit and industrial personal computer；The main control unit is logical
Cross wired mode connection focus；
Detection system is configured in triggering collection pattern or continuous acquisition pattern, and focus taps when triggering collection pattern
Tunnel surrounding generates trigger signal, and trigger signal is sent to main control unit, and main control unit assigns the instruction of triggering collection, and leads to
It crosses receiving unit and is sent to transmitter unit startup acquisition function；Industrial personal computer sends continuous acquisition to main control unit when continuous acquisition pattern
Instruction, main control unit control transmitter unit by receiving unit and start acquisition function.
The transmitter unit is corresponded with receiving unit, and the group that different transmitter units is formed with receiving unit is to work
In different frequency range, carries out parallel wireless data transmission and do not interfere with each other.
The multiple receiving unit can be cascaded by daisy chain form, the data that receiving unit receives itself and
Data from previous stage are transmitted to rear stage successively；Particularly, afterbody receiving unit is by all data transmissions to master control
Unit.
The three-component geophone quantity can carry out no maximum extension, only need to increase corresponding transmitter unit and receiving unit
?.
The transmitter unit include wireless module, the first controller, FIFO buffers, SRAM memory, high precision clock,
AD converter, signal conditioning circuit, power management module and rechargeable battery, the transmitter unit can be supplied by rechargeable battery
Electricity, power management module carry out management of charging and discharging to rechargeable battery；Wireless module can receive the letter of the control from receiving unit
Number and be sent to the first controller, the first controller sends answer signal and status information by wireless module to unit is received；In height
Under the control of accuracy clock, three road converters have the clock signal of stringent synchronization, when transmitter unit is received from receiving unit
Synch command after restart high precision clock immediately；Three-component geophone can acquire on tunnel side wall on tri- directions x/y/z
Seismic wave waveform, waveform in each direction is processed into digital letter after signal conditioning circuit and AD converter respectively
Number, it is subsequently sent to FIFO buffers and carries out data buffer storage；First controller is fetched evidence from FIFO buffers, executes compression algorithm
Compressed data are stored in SRAM memory, the first controller can also be from by data after compression and leading in SRAM memory
It crosses wireless module and sends receipts unit.
Due to using data compression algorithm in transmitter unit, data volume is reduced, therefore improve wireless data biography
Defeated speed.
Further, the clock generating circuit that the high precision clock has temperature-compensating, frequency accuracy high, makes one
It fixes time in range, long time continuous working is because of clocking error between avoiding each transmitter unit under same use environment
Caused data acquisition difference walks and causes mistake, and clock accuracy is better than 0.1ppm.
The transmitter unit has unique ID, and each ID transmitter units can be with the position one for the three-component geophone connecting
One corresponds to, i.e., the same ID transmitter units placement location is constant and while connecting the wave detector of different test positions can redefine
The sequence of data processing can be refused to access to ensure the safety of data simultaneously for illegal ID systems.
Further, the ID of the transmitter unit is made of 2 bytes, and high byte is group address (group number), and low byte is
Terminal address (terminal number).
The group address refers to all terminals composition that this high byte is worth that identical, RF channels are identical, terminal address is different
One group.The terminal address is that same group address, RF channels be identical, different low byte values, to distinguish each receiving unit
And transmitter unit.The same group address, the receiving unit of difference RF channels and transmitter unit are not one group.Described same group,
When needing to increase new terminal, it can be completed as long as configuration transmitter unit is identical group number, RF channels, different terminal numbers.
The receiving unit includes wireless module, second controller and dma controller；The wireless module will receive
Data from transmitter unit are sent to second controller, and second controller sends the data to dma controller, the DMA controls again
Utensil has data buffer storage and data transmission control function；Control command can be sent to transmission by second controller by wireless module
Unit, can also be by wireless module reception come the answer signal and status information of sending unit.
Rear class data-interface, rear class control interface, the rear class power interface of the receiving unit are received with rear stage respectively
Prime data-interface, prime control interface, the prime power interface of unit are connected；Particularly, after afterbody receiving unit
Level data interface, rear class control interface, rear class power interface connect with the data-interface of main control unit, control interface and power supply respectively
Mouth is connected.
The main control unit between above-mentioned daisy chain cascading pattern and different receiving units by carrying out data transmission, controlling
Information exchange and power supply supply.
The main control unit is mainly by dma controller, high precision clock, trigger signal detection module, third controller, electricity
The data received are sent to third controller by source module and USB module composition, dma controller, and third controller will connect first
After the compressed data decompression received, industrial personal computer is then sent to via USB data line by USB module；Industrial personal computer and third control
The interaction of control command, answer signal and status information can be carried out between device processed by USB module；Industrial personal computer can pass through power supply
Module is powered to main control unit；High precision clock can provide high-precision clock source signals for third controller；It is tactile when being operated in
When sending out acquisition mode, focus can generate a trigger signal after tapping tunnel surrounding, when trigger signal detection module detects
After trigger signal, notice third controller generates the control command of a triggering collection.
Further, corresponding control command is sent to main control unit by the industrial personal computer, after main control unit resolve command simultaneously
It is sent to multiple transmitter units successively by ordering, answer signal, master control list are returned to main control unit after transmitter unit resolve command
Member returns to the multiple answer signals received in the status display interface of industrial personal computer.
Further, the industrial personal computer can be independently controlled each transmitter unit, including groundwork parameter configuration,
Signal acquisition parameter configuration, control etc., groundwork parameter configuration include the ID, wireless communication rate, channel radio of transmitter unit
Believe that signal power, RF channels etc., signal acquisition parameter configuration include sample rate, acquisition duration (or acquisition points), gain, starting
Data delay etc., control include that sleeping/waking, synchronization, startup/stopping sample, call data, emptying data and/or data are adopted
Integrated mode etc..
The data acquisition scheme could be provided as triggering collection pattern or continuous acquisition pattern.
Above-mentioned first controller, second controller and third controller are preferably FPGA.
The second object of the present invention is to provide a kind of working method based on above system, specifically includes head after system boot
First carry out self-test, detection main control unit connect with industrial personal computer it is whether normal, it is wireless between detection transmitter unit and receiving unit
Whether data communication is normal, detects the battery level information of transmitter unit, enters in next step if working properly, otherwise recycles
Self-test.
When selecting triggering collection pattern, parameter setting is carried out first, includes mainly data save location, sample rate and adopting
Collect time etc., main control unit sends synch command to multiple transmitter units in the form of broadcasting and carries out time synchronization, main control unit
It detects and sends out startup acquisition to all transmitter units in the form of broadcast after focus taps the trigger signal that tunnel surrounding generates
Order, to ensure that log-on data acquires all transmitter units in the same time, the data after AD conversion are stored in by transmitter unit
In SRAM memory；After reaching the acquisition time of setting, transmitter unit stops AD conversion and passes through the data of storage wireless
Mode is sent to receiving unit, and main control unit will be transmitted to work after data summarization that multiple receiving units receive by wired mode
In control machine, the acquisition software installed in last industrial personal computer shows data in the form of waveform.
When selecting continuous acquisition pattern, parameter setting is carried out first, includes mainly data save location and sample rate etc.,
Main control unit sends synch command to multiple transmitter units in the form of broadcasting and carries out time synchronization, then carries out velocity test,
For obtaining current wireless data transmission speed；Transmitter unit starts AD conversion immediately after starting acquisition, and will be transformed
Data are stored in SRAM memory, repeat this process until stopping acquiring；While AD conversion and SRAM store,
Transmitter unit is carried out at the same time wireless data transmission, stored data are sent out, and acquisition software will constantly receive
Data are shown in the form of waveform；After starting continuous acquisition, system is synchronized into row clock automatically at regular intervals.
It is as follows that continuous acquisition mode data stores and transmits principle：Transmitter unit stores the data after AD conversion to SRAM
Memory medium velocity vwIt is known, current wireless data transmission speed v can be obtained by carrying out velocity testt, speed can be obtained
Spend multiple n=[vw/vt] round up, to which SRAM memory is divided into a data field (n+1)；It is first first to store pointer
It is directed toward the first data field, by the data storage to the first data field after AD conversion, pointer is stored after the storage of the first data field is full
It is moved to the second data field, repeats the above process, after data field (n+1) storage is full, storage pointer cycle is directed toward the first number
According to area；Only after the storage of the first data field is full, sends pointer and be just directed toward the first data field, the data in the first data field are led to
It crosses wireless mode to send, transmission pointer is moved to the second data field after having sent the data in the first data field, repeats
The above process after (n+1) has been sent when data field, sends pointer cycle and is directed toward the first data field, realizes cycle storage and send
Data.
Due to vw>vtAnd SRAM memory is divided into a data field (n+1), therefore can ensure that data will not cover
It loses, can theoretically recycle storage limitless volumes data.
Compared with prior art, beneficial effects of the present invention are：
(1) the distributed signal acquisition system based on wireless data communication is used, without laying data-communication cables, earthquake
Wave wave detector can arbitrarily be arranged on tunnel side wall, and seismic wave forward probe can be easily carried out in tunnel；
(2) system uses three-component geophone, can obtain the seismic wave waveform on tri- directions tunnel side wall x/y/z,
And three-component geophone quantity can carry out no maximum expansion；；
(3) system has two kinds of operating modes of triggering collection and continuous acquisition, may be used in combination active source and broken rock shake
Two kinds of source seismic wave forward probe method；
(4) system has Time Synchronization Mechanism, can ensure that different three-component geophones measure earthquake to greatest extent
The time consistency of wave waveform.
(5) system is using professional high speed 2.4GHz data transfer communications modes, and there is no the intelligent networks such as WIfi, ZigBee
The command/data of network transmits the uncertainty being delayed caused by the reasons such as protocol layer interaction, message queue, ensure that signal acquisition
The stringent synchronization of clock, the synchronization of phase and log-on data acquire Startup time while property.
(6) system realizes the safety of data, and command/data friendship is carried out between industrial personal computer, main control unit, transmitter unit
Mutually transmission has followed specific communication protocol, and data flow has carried out the measures such as data check, encryption, ensure that the correctness of data
And confidentiality.
(7) more RF channels of the system, ID coding modes make system have extraordinary scalability, extension flexible.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is portable tunnel seismic wave forward probe system integrated stand composition；
Fig. 2 is transmitter unit structure diagram；；
Fig. 3 is receiving unit and main control unit structure diagram；
Fig. 4 is data acquisition flow figure；
Fig. 5 is that continuous acquisition mode data stores and transmits schematic diagram；
Wherein, 1. industrial personal computer, 2.USB data lines, 3. main control units, 4. focus, 5. transmitter units, 6. three component geophones
Device, 7.USB modules, 8.FPGA, 9. trigger signal detection modules, 10. power modules, 11. downlink command buffering areas, 12. uplinks
Data buffer zone, 13. wireless modules, 14.SRAM memories, 15. power management modules, 16. rechargeable batteries, when 17. high-precision
Clock, 18.AD converters, 19. signal conditioning circuits, 20.FIFO buffers, 21. acquisition softwares, 22. parameter settings, 23. states
It has been shown that, 24. time synchronizations, 25. data show that 26. start to acquire, and 27. stop acquisition, 28. receiving units, 29.DMA controls
Device.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this hair
Bright each component or component structure relationship and the relative of determination, not refer in particular to either component or element in the present invention, cannot understand
For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " shall be understood in a broad sense, and indicate may be a fixed connection,
Can also be to be integrally connected or be detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the present invention as the case may be,
It is not considered as limiting the invention.
A kind of portable tunnel seismic wave forward probe system, integrated stand composition as shown in Figure 1, mainly by industrial personal computer 1,
USB data line 2, main control unit 3, receiving unit 28, focus 4, transmitter unit 5 and three-component geophone 6 form.It wherein acquires soft
In industrial personal computer 1, industrial personal computer 1 is carried out data transmission part 21 by USB data line 2 and main control unit 3, and focus 4 passes through wired side
Formula is connected on main control unit 3.Three-component geophone is installed on tunnel side wall, can obtain the earthquake on tri- directions x/y/z
Wave waveform, a three-component geophone 6 are connected by wired mode with a transmitter unit 5, and main control unit 3 can be by wireless
Carry out data transmission between mode and multiple transmitter units 5.
Portable tunnel seismic wave forward probe system has two kinds of operating modes of triggering collection and continuous acquisition.
Specifically, focus taps tunnel surrounding generation trigger signal when triggering collection pattern, and trigger signal is sent to master
Unit 3 is controlled, main control unit 3 assigns the instruction of triggering collection, and is sent to transmitter unit 5 by receiving unit 28 and starts acquisition work(
Energy；Industrial personal computer 1 sends continuous acquisition instruction by USB data line 2 to main control unit 3 when continuous acquisition pattern, and main control unit 3 is logical
It crosses receiving unit 28 and controls the startup acquisition function of transmitter unit 5.
Transmitter unit 5 and receiving unit 28, which correspond, different " transmitter unit 5 --- receiving unit 28 to " is operated in not
Same frequency range can carry out parallel wireless data transmission and not interfere with each other.Multiple receiving units 28 can carry out grade by daisy chain form
Connection, the data that receiving unit 28 receives itself and the data from previous stage are transmitted to rear stage successively；Particularly, finally
Primary Receive unit 28 is by all data transmissions to main control unit 3.6 quantity of the three-component geophone can carry out no maximum expansion
Exhibition only need to increase corresponding transmitter unit 5 and receiving unit 28.
Transmitter unit structure diagram as shown in Fig. 2, transmitter unit 5 mainly by wireless module 13, FPGA 8, FIFO buffers
20, SRAM memory 14, high precision clock 17, AD converter 18, signal conditioning circuit 19, power management module 15 and charging electricity
Pond 16 forms.Transmitter unit 5 can be powered by rechargeable battery 16, and power management module 15 can carry out rechargeable battery 16
Management of charging and discharging；Wireless module 13 can receive the control signal from receiving unit 28 and be sent to FPGA 8, and FPGA 8 can be with
By wireless module 13 answer signal and status information are sent to unit 28 is received.
Under the control of high precision clock 17, three road AD converters 18 have the clock signal of stringent synchronization, when transmitting is single
Member 5 restarts high precision clock 17 immediately after receiving the synch command from receiving unit 28；Three-component geophone 6 can acquire tunnel
Seismic wave waveform on road abutment wall on tri- directions x/y/z, waveform in each direction pass through 19 He of signal conditioning circuit respectively
It is processed into digital signal after AD converter 18, FIFO buffers 20 is subsequently sent to and carries out data buffer storage；FPGA 8 can be from
It fetches in FIFO buffers 20 evidence, executes compression algorithm and compressed data are stored in SRAM memory 14, FPGA 8 also may be used
With the data after it will be compressed in SRAM memory 14 and pass through the transmission receipts unit 28 of wireless module 13.
Due to using data compression algorithm in transmitter unit 5, data volume is reduced, therefore improve wireless data biography
Defeated speed.
The clock generating circuit that high precision clock 17 has temperature-compensating, frequency accuracy high, makes in certain time range
Interior, long time continuous working is because of data caused by clocking error between avoiding each transmitter unit under same use environment
Acquisition difference walks and causes mistake, and clock accuracy is better than 0.1ppm.
Each transmitter unit 5 has unique ID, and each ID transmitter units can be with the position for the three-component geophone 6 connecting
Correspond, i.e., same 5 placement location of ID transmitter units is constant and while connecting the wave detector of different test positions can be again
The sequence for defining data processing, can refuse to access to ensure the safety of data simultaneously for illegal ID systems.The ID is by 2
Byte is constituted, and high byte is group address (group number), and low byte is terminal address (terminal number).
Group address refers to that this high byte is worth the one of all terminals composition that identical, RF channels are identical, terminal address is different
Group.The terminal address is that same group address, RF channels be identical, different low byte values, to distinguish 28 He of each receiving unit
Transmitter unit 5.
Same group address, the receiving unit 28 of difference RF channels and transmitter unit 5 are not one group.
Same group, when needing to increase new terminal, as long as configuration transmitter unit 5 is identical group number, RF channels and different
Terminal number can be completed.
Receiving unit and main control unit structure diagram as shown in figure 3,28 main wireless module 13 of receiving unit, FPGA 8,
Dma controller 29 forms.The data from transmitter unit 5 received are sent to FPGA 8 by wireless module 13, and FPGA 8 again will
Data are sent to dma controller 29, and the dma controller 29 has data buffer storage and data transmission control function；FPGA 8 can be with
Control command is sent to transmission unit 5 by wireless module 13, can also be received come sending unit 5 by wireless module 13
Answer signal and status information.
Rear class data-interface, rear class control interface, the rear class power interface of receiving unit 28 receive with rear stage single respectively
Prime data-interface, prime control interface, the prime power interface of member 28 are connected；Particularly, afterbody receiving unit 28
Rear class data-interface, rear class control interface, rear class power interface respectively with the data-interface, control interface, power supply of main control unit 3
Interface is connected.Main control unit 3 be exactly by carrying out data transmission between above-mentioned daisy chain cascading pattern and different receiving units 28,
Control information exchange and power supply supply.
Main control unit 3 is mainly by dma controller 29, high precision clock 17, trigger signal detection module 9, FPGA 8, power supply
Module 10 and USB module 7 form.The data received are sent to FPGA8, the pressure that FPGA 8 will be received first by dma controller
After contracting data decompression, industrial personal computer 1 is then sent to via USB data line 2 by USB module 7；Between industrial personal computer 1 and FPGA 8
The interaction of control command, answer signal and status information can be carried out by USB module 7；Industrial personal computer 1 can pass through power module 10
It powers to main control unit 3；High precision clock 17 can be that FPGA 8 provides high-precision clock source signals；When being operated in triggering collection
When pattern, focus 4 can generate a trigger signal after tapping tunnel surrounding, when trigger signal detection module 9 detects triggering
After signal, notice FPGA 8 generates the control command of a triggering collection.
Corresponding control command is sent to main control unit 3 by industrial personal computer 1, after 3 resolve command of main control unit and will order according to
It is secondary to be sent to multiple transmitter units 5, it is incited somebody to action to the return answer signal of main control unit 3, main control unit 3 after 5 resolve command of transmitter unit
The multiple answer signals received return in the status display interface of industrial personal computer 1.
Industrial personal computer 1 can be independently controlled each transmitter unit 5, including groundwork parameter configuration, signal acquisition
Parameter configuration, control etc., groundwork parameter configuration include the ID, wireless communication rate, wireless communication signals work(of transmitter unit
Rate, RF channels etc., signal acquisition parameter configuration include sample rate, acquisition duration (or acquisition points), gain, initial data time delay
Include that sleeping/waking, synchronization, startup/stopping sample, call data, empty data, data acquisition scheme etc. Deng, control.It is described
Data acquisition scheme could be provided as triggering collection pattern or continuous acquisition pattern.
Data acquisition flow figure as shown in figure 4, carry out self-test first after system boot, detection main control unit 3 and industrial personal computer 1
Whether connection is normal, and whether the wireless data communication detected between transmitter unit 5 and receiving unit 28 is normal, detects transmitter unit
5 battery level information enters in next step if working properly, otherwise recycles self-test.
When selecting triggering collection pattern, parameter setting is carried out first, includes mainly data save location, sample rate and adopting
Collect time etc., time synchronization then will be carried out between main control unit 3 and multiple transmitter units 5；Main control unit 3 detects focus 4
The order for starting acquisition is sent out to all transmitter units 5 in the form of broadcast after tapping the trigger signal that tunnel surrounding generates, with
Ensure that log-on data acquires all transmitter units 5 in the same time, the data after AD conversion are stored in SRAM memory by transmitter unit
In 14；After reaching the acquisition time of setting, transmitter unit 5 stops AD conversion and wirelessly sends the data of storage
To receiving unit 28, main control unit 3 will be transmitted to industry control after data summarization that multiple receiving units 28 receive by wired mode
In machine 1, the acquisition software 21 installed in last industrial personal computer 1 shows data in the form of waveform.
When selecting continuous acquisition pattern, parameter setting is carried out first, includes mainly data save location and sample rate etc.,
Main control unit 3 sends synch command to multiple transmitter units 5 in the form of broadcast and carries out time synchronization, then carries out speed survey
Examination, for obtaining current wireless data transmission speed；Transmitter unit 5 starts AD conversion immediately after starting acquisition, and will conversion
Data afterwards are stored in SRAM memory 14, repeat this process until stopping acquiring；It is stored in AD conversion and SRAM
While, transmitter unit 5 is carried out at the same time wireless data transmission, and stored data are sent out, and acquisition software 21 is continuous
The data received are shown in the form of waveform；After starting continuous acquisition, when system carries out automatically at regular intervals
Clock synchronizes.
Continuous acquisition mode data stores and transmits schematic diagram as shown in figure 5, transmitter unit 5 deposits the data after AD conversion
Store up 14 medium velocity v of SRAM memorywIt is known, current wireless data transmission speed v can be obtained by carrying out velocity testt,
It can obtain speed multiple n=[vw/vt] round up, to which SRAM memory 14 is divided into a data field (n+1)；It deposits
Storage pointer is first initially directed to the first data field, and by the data storage to the first data field after AD conversion, the first data field stores
Storage pointer is moved to the second data field after full, repeats the above process, and after data field (n+1) storage is full, storage pointer follows
Fourth finger is to the first data field；Only after the storage of the first data field is full, sends pointer and be just directed toward the first data field, by the first data
Data in area are wirelessly sent, and transmission pointer is moved to the second number after having sent the data in the first data field
According to area, the above process is repeated, after (n+1) has been sent when data field, pointer cycle is sent and is directed toward the first data field；Due to vw>vt
And SRAM memory 14 is divided into a data field (n+1), therefore can ensure data will not coverage loss, theoretically can be with
Cycle storage limitless volumes data.
Above unspecified component uses finished device.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of portable tunnel 3-D seismics seismic wave forward probe system, it is characterized in that：Including industrial personal computer, main control unit,
Receiving unit, focus, transmitter unit and three-component geophone, wherein：
The three-component geophone is installed on tunnel side wall, obtains the seismic wave waveform on tri- directions x, y and z, and one
Three-component geophone is correspondingly connected with a transmitter unit by wired mode；Between the main control unit and each transmitter unit
Wirelessly carry out data transmission；It is attached between the main control unit and industrial personal computer；The main control unit is by having
Line mode connects focus；
The transmitter unit is corresponded with receiving unit, and the corresponding receiving unit group of different transmitter units is to work respectively
Make to form cascade between different frequency range, each receiving unit, the data and come from previous stage that receiving unit receives itself
Data be transmitted to rear stage successively, until being transmitted to main control unit；
It is extended by the cascade of transmitter unit and receiving unit, realizes the extension of the three-component geophone quantity；
The detection system is configured in triggering collection pattern or continuous acquisition pattern, and focus taps when triggering collection pattern
Tunnel surrounding generates trigger signal, and trigger signal is sent to main control unit, and main control unit assigns the instruction of triggering collection, and leads to
It crosses receiving unit and is sent to transmitter unit startup acquisition function；Industrial personal computer sends continuous acquisition to main control unit when continuous acquisition pattern
Instruction, main control unit control transmitter unit by receiving unit and start acquisition function.
2. a kind of portable tunnel seismic wave forward probe system as described in claim 1, it is characterized in that：Transmitter unit includes
Wireless module, the first controller, FIFO buffers, SRAM memory, high precision clock, AD converter, signal conditioning circuit, electricity
Source control module and rechargeable battery, transmitter unit are powered by rechargeable battery, and power management module carries out rechargeable battery
Management of charging and discharging；Wireless module receives the control signal from receiving unit and is sent to the first controller, and the first controller passes through
Wireless module sends answer signal and status information to unit is received；After transmitter unit receives the synch command from receiving unit
High precision clock is restarted immediately；Three-component geophone acquires the seismic wave waveform on tri- directions x, y and z on tunnel side wall, often
Waveform on a direction is processed into digital signal after signal conditioning circuit and AD converter respectively, and it is slow to be subsequently sent to FIFO
Storage carries out data buffer storage；First controller is fetched evidence from FIFO buffers, is executed compression algorithm and is deposited compressed data
Enter in SRAM memory, the first controller or from SRAM memory will after compression data and pass through wireless module send receive it is single
Member.
3. a kind of portable tunnel seismic wave forward probe system as described in claim 1, it is characterized in that：
Rear class data-interface, rear class control interface and the rear class power interface of the receiving unit respectively with rear stage receiving unit
Prime data-interface, prime control interface is connected with prime power interface；The rear class data-interface of afterbody receiving unit,
Rear class control interface and rear class power interface are connected with the data-interface of main control unit, control interface and power interface respectively.
4. a kind of portable tunnel seismic wave forward probe system as described in claim 1, it is characterized in that：The main control unit
Including dma controller, high precision clock, trigger signal detection module, second controller, power module and USB module, DMA controls
The data received are sent to second controller after second controller decompresses the compressed data received and pass through USB by device processed
Module is sent to industrial personal computer via USB data line；Control command is carried out by USB module between industrial personal computer and second controller, is answered
Answer the interaction of signal and status information；Industrial personal computer is powered by power module to main control unit；High precision clock can be the second control
Device processed provides high-precision clock source signals；When being operated in triggering collection pattern, focus generates one after tapping tunnel surrounding
Trigger signal, after trigger signal detection module detects trigger signal, notice second controller generates the control of triggering collection
Order.
5. a kind of portable tunnel seismic wave forward probe system as described in claim 1, it is characterized in that：The industrial personal computer will
Corresponding control command is sent to main control unit, and multiple transmittings are sent to successively singly after main control unit resolve command and by order
Member, returns to answer signal after transmitter unit resolve command to main control unit, and main control unit returns the multiple answer signals received
Back in the status display interface of industrial personal computer；
Or the industrial personal computer is independently controlled each transmitter unit.
6. a kind of portable tunnel seismic wave forward probe system as described in claim 1, it is characterized in that：
There is the transmitter unit unique ID, the position of the three-component geophone of each ID transmitter units and connection to correspond,
The i.e. same ID transmitter units placement location is constant and redefines data processing when connecting the wave detector of different test positions
Sequence, while refusing to access the transmitter unit of illegal ID.
7. a kind of portable tunnel seismic wave forward probe system as claimed in claim 6, it is characterized in that：The transmitter unit
ID be made of 2 bytes, high byte is group address, and low byte is terminal address；
The group address refers to that this high byte is worth the one of all terminals composition that identical, RF channels are identical, terminal address is different
Group；
The terminal address is same group address, the identical and different low byte value of RF channels, to distinguish each receiving unit and hair
Penetrate unit；
The same group address, the receiving unit of difference RF channels and transmitter unit are not one group；
Described same group, when needing to increase new terminal, as long as configuration transmitter unit is identical group number, RF channels and different ends
End number can be completed.
8. the triggering collection pattern work based on the tunnel seismic wave forward probe system as described in any one of claim 1-7
Method, it is characterized in that：
Parameter setting, including data save location, sample rate and acquisition time are carried out, main control unit is in the form of broadcasting to multiple
Transmitter unit sends synch command and carries out time synchronization, and main control unit detects that focus taps the trigger signal that tunnel surrounding generates
It sends out the order for starting acquisition to all transmitter units in the form of broadcast afterwards, realizes all transmitter units log-on data in the same time
Data after AD conversion are stored in SRAM memory by acquisition, each transmitter unit；After reaching the acquisition time of setting, hair
It penetrates unit to stop AD conversion and the data of storage are wirelessly sent to receiving unit, main control unit is single by multiple receptions
It is transmitted in industrial personal computer by wired mode after the data summarization that member receives, number is shown in the form of waveform in last industrial personal computer
According to.
9. the continuous acquisition pattern work based on the tunnel seismic wave forward probe system as described in any one of claim 1-7
Method, it is characterized in that：
Parameter setting, including data save location and sample rate are carried out, main control unit is in the form of broadcasting to multiple transmitter units
It sends synch command and carries out time synchronization, then carry out velocity test, obtain current wireless data transmission speed；
Transmitter unit starts AD conversion, and transformed data are stored in SRAM memory, repeats this process until stopping
Until only acquiring；While AD conversion and SRAM store, transmitter unit is carried out at the same time wireless data transmission, will be stored
Data are sent out, and constantly show the data received in the form of waveform；
During continuous acquisition, synchronized automatically into row clock at regular intervals.
10. based on working method as described in claim 9, it is characterized in that：Determine transmitter unit by the number after AD conversion
SRAM memory medium velocity v is arrived according to storagew, obtain current wireless data transmission speed vt, obtain speed multiple n=[vw/
vt], SRAM memory is divided into a data field (n+1)；
Storage pointer is first initially directed to the first data field, the data after AD conversion is stored into the first data field, the first data
Storage pointer is moved to the second data field after area's storage is full, repeats the above process, after data field (n+1) storage is full, deposits
It stores up pointer cycle and is directed toward the first data field, constantly cycle storage and transmission data.
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Denomination of invention: A Portable Tunnel Seismic Wave Advance Detection System and Method Effective date of registration: 20230830 Granted publication date: 20190326 Pledgee: Qilu Bank Co.,Ltd. Jinan Kaiyuan Branch Pledgor: Shandong bai20 Huitong Engineering Technology Co.,Ltd. Registration number: Y2023980054639 |