CN106483557A - GNSS is used for the variable sampling system and method for seismic monitoring - Google Patents
GNSS is used for the variable sampling system and method for seismic monitoring Download PDFInfo
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- CN106483557A CN106483557A CN201611113235.7A CN201611113235A CN106483557A CN 106483557 A CN106483557 A CN 106483557A CN 201611113235 A CN201611113235 A CN 201611113235A CN 106483557 A CN106483557 A CN 106483557A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- Radar, Positioning & Navigation (AREA)
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- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
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Abstract
The invention discloses a kind of GNSS is used for the variable sampling system and method for seismic monitoring, belong to seismic monitoring or vibration-testing field.The system includes target GNSS core board；It is provided with earthquake and judgment means and GNSS sampling configuration switching device occurs；Accelerometer, digital signal processing chip, single-chip microcomputer, programmable gate array and GNSS core board are sequentially connected；Programmable gate array, network interface card, monitor client and GNSS core board are sequentially connected.The present invention has following advantages and good effect：1. integrated with GNSS using sensitive accelerometer, avoid the low problem for being difficult to seismic first breaks of GNSS precision；2. monitoring cost and memory space is substantial saving in, improves operating efficiency；3. can achieve to switch automatic mode and artificial mode according to actual conditions.
Description
Technical field
The invention belongs to seismic monitoring or vibration-testing field, and in particular to a kind of GNSS is used for the variable of seismic monitoring
Sampling system and its method.
Background technology
GNSS (GLONASS) has become the conventional instrument of seismic monitoring at present.Conventional geodetic type
(Geodetic) GNSS is used for generally having both of which during seismic monitoring：One be using relatively low sample frequency, such as 30sec,
The isometric periodical configuration deformation of 15sec monitoring crustal movement；Two be in earthquake, with higher sample frequency, such as 1Hz, 50Hz,
The non-construction signal of high frequency caused by the monitoring earthquake such as 100Hz.But as earthquake prediction is global problem, cannot judge in advance
Whether monitoring area has earthquake generation, causes GNSS individually can only work with the pattern of above-mentioned one, and during for monitoring shake
The GNSS of high sampling rate be only capable of adopting the recording method of circulation flushing to ensure memory requirement, be frequently present of mass efficient data
The situation of loss.The bottleneck of storage causes efficiency of the GNSS in terms of seismic monitoring to have a greatly reduced quality；And accelerometer is then with low
The feature of cost, small size and convenient use.
Content of the invention
The object of the invention is that the shortcoming and defect for overcoming prior art to exist, and provides a kind of GNSS for seismic monitoring
Variable sampling system and method, improve the task performance of GNSS and effective protection Monitoring Data.
The technical scheme for realizing the object of the invention is：
Seismic wave is identified and is judged using its sensitivity of accelerometer to reach the generation of identification earthquake, based on identification
Algorithm devises a kind of GNSS for the variable sampling system and method for seismic monitoring, not only makes the aforementioned two kinds of Working moulds of GNSS
Formula is coexisted in seismic monitoring, is improved the effective utilization of GNSS, and safely can be preserved Monitoring Data, overcomes storage capacity
Not enough problem.
Accelerometer is carried out integrated by the present invention with GNSS, determines that monitored area is based on accelerogram and recognizer
No generation earthquake is to change GNSS sampling configuration, and the switching for realizing automatically with artificial mode by remote monitoring.
Specifically：
First, GNSS is used for the variable sampling system (abbreviation system) of seismic monitoring
The system includes target GNSS core board；
It is provided with earthquake and judgment means and GNSS sampling configuration switching device occurs；
It is single that described earthquake occurs judgment means to include that front latter linked accelerogram unit 110 and trigger condition judge
Unit；Accelerogram unit includes front latter linked accelerometer and first memory；Trigger condition judging unit is included successively
The digital signal processing chip of connection, single-chip microcomputer and clock；
Described GNSS sampling configuration switching device includes instruction transmission and control unit and remote monitoring unit；Instruction is passed
Defeated and control unit includes front latter linked programmable gate array and second memory；Remote monitoring unit include network interface card and
Monitor client；
Its annexation is：
Accelerometer, digital signal processing chip, single-chip microcomputer, programmable gate array and GNSS core board connect successively
Connect；Programmable gate array, network interface card, monitor client and GNSS core board are sequentially connected.
2nd, GNSS is used for the variable sampling method (abbreviation method) of seismic monitoring
This method is that occur judgement unit to determine the currently monitored regional earthquake situation by earthquake, by GNSS sampling configuration
Switch unit change GNSS sampling configuration automatically or manually.
Comprise the following steps：
1. accelerogram unit exports the three-component acceleration signal of X, Y, Z, and trigger condition judging unit utilizes STA/
The short time average STA of LTA method comparison acceleration signal and signal long when mean value LTA judging the generation of earthquake；When
The value of STA/LTA more than threshold values when, trigger condition judging unit exports trigger, and sends two in upper once trigger
After as a child, output recovers signal.Realize the automatic identification function to seismic events；
2. instruction transmission receives, with control unit, the trigger that trigger condition judging unit is exported, and passes to GNSS core board
Contribute's sample rate is heightened to the instruction of 10Hz；After signal is recovered, turn down to the finger of 30sec to GNSS core board transmission sample rate
Order, realizes the variable sampling system under automatic mode；
3. instruction transmission with control unit receive trigger while, to remote monitoring unit export alarm command；Far
Range monitoring unit shows trigger condition judging unit output result to user, and user can be independent to height using remote monitoring unit
Frequency GNSS core board transmits sample rate change directive, and priority level is higher than instruction transmission and control unit instruction；Remote monitoring list
Unit is turned down to the instruction of 30sec to high frequency GNSS core board transmission sample rate, realizes variable after handoff procedure starts 2 hours
The automatic mode of sample rate system and the switching of artificial mode.
The present invention has following advantages and good effect：
1. integrated with GNSS using sensitive accelerometer, then the seismic wave first motion identification of accelerometer, speedometer is calculated
Method has avoided the low problem for being difficult to seismic first breaks of GNSS precision for judging whether earthquake；
2. more traditional difference monitoring pattern, the low frequency for realizing GNSS according to the different Seismic state variation in observation area are adopted
Original mold formula and the free switching of high frequency sampling configuration, substantial saving in monitoring cost and memory space, improve operating efficiency；
3. using automatic mode under conditions of outlying district is nothing network, load and preset sampling configuration；Unobstructed in network
The switching of artificial mode is realized in region, can add human intervention to sampling configuration, can achieve to switch automatic mold according to actual conditions
Formula and artificial mode.
In a word, the present invention takes into full account technical feasibility, is integrated to GNSS to increase GNSS's with cheap accelerometer
Monitoring efficiency, overcome storage bottleneck；As the scale of GNSS seismic monitoring network expands further, this method is showed
Cost advantage and performance advantage effect will be apparent from.
Description of the drawings
Fig. 1 is the block diagram of the system；
Fig. 2 is the workflow diagram of trigger condition judging unit.
In figure：
There are judgment means in 100 earthquakes,
110 accelerogram units,
111 accelerometers,
112 first memories；
120 trigger condition judging units,
121 digital signal processing chips (DSP),
122 single-chip microcomputers,
123 clocks；
200 GNSS sampling configuration switching devices,
210 instruction transmission and control unit,
211 programmable gate arrays (FPGA),
212 second memories；
220 remote monitoring unit,
221 network interface cards,
222 monitor clients；
300 GNSS core boards.
English to Chinese：
1、GNSS：Global Navigation Satellite System, GLONASS；It is to refer to institute
The GPS of some satellite navigation systems, the such as U.S., Muscovite Glonass, the Galileo in Europe, the Beidou satellite navigation of China
System, is also contemplated by building and other satellite navigation systems later to be built；International GNSS system be multisystem, stage construction and
Multimodal complicated combined system.
2、STA/LTA：Mean value when STA is long, LTA are short time average, and STA/LTA is long comparison algorithm in short-term, uses
In the differentiation seismic first breaks moment.
Specific embodiment
Describe in detail with reference to the accompanying drawings and examples：
First, system
1st, overall
Such as Fig. 1, the system include target GNSS core board 300；
It is provided with earthquake and judgment means 100 and GNSS sampling configuration switching device 200 occurs；
Described earthquake occurs judgment means 100 to include that front latter linked accelerogram unit 110 and trigger condition are sentenced
Disconnected unit 120；Accelerogram unit 110 includes front latter linked accelerometer 111 and first memory 112；Trigger condition
Judging unit 120 includes digital signal processing chip 121, single-chip microcomputer 122 and the clock 123 being sequentially connected；
Described GNSS sampling configuration switching device 200 includes instruction transmission and control unit 210 and remote monitoring unit
220；Instruction transmission includes front latter linked programmable gate array 211 and second memory 212 with control unit 210；Far
Range monitoring unit 220 includes network interface card 221 and monitor client 222；
Its annexation is：
Accelerometer 111, digital signal processing chip 121, single-chip microcomputer 122, programmable gate array 211 and GNSS core
Core 300 is sequentially connected；Programmable gate array 211, network interface card 221, monitor client 222 and GNSS core board 300 are successively
Connection.
2nd, functional part
1) there are judgment means 100 in earthquake
(1) accelerogram unit 110
* accelerometer 111：The three-component accekeration of output X, Y, Z, precision are not less than 1mg.
Its function is to provide seismic wave accelerogram to judge whether earthquake occurs for following model.
* first memory 112：General memory, capacity are not less than 64G.
Its function is storage accelerogram, checks for subsequent extracted accelerogram.
(2) trigger condition judging unit 120
* digital signal processing chip 121：The chip of Digital Signal Processing can be realized.
Its function is the emulation letter for carrying out instrument response, bandpass filtering and particular instrument to the acceleration signal being input into
Number, carry out seismic phase identification and extract in order to subsequent module.
* single-chip microcomputer 122
The hardware configuration of single-chip microcomputer 122 includes central processor CPU, random access memory RAW, read only memory ROM, multiple
I/O and interruption system, counter；
Which is embedded with the working software of this trigger condition judging unit 120.
Its function is to judge whether earthquake occurs using STA/LTA algorithm.
* clock 123
Its function is to provide time reference for single-chip microcomputer 122.
2) GNSS sampling configuration switching device 200
(1) instruction transmission and control unit 210
* programmable gate array 211
The online programmable device of logic, sequential, computing can be realized, realizes logical operation and the judgement of signal.
Its function is the instruction according to 122 output result of single-chip microcomputer to 230 output adjustment sample rate of GNSS core board.
* second memory 212
General memory, its function are storage triggering command, for checking afterwards.
(2) remote monitoring unit 220
* network interface card 221
Network adapter, is the interface for connecting computer and transmission medium.
Its function be by system and network connection.
* monitor client 222：Remote signal processes software.Its function is that instruction is transmitted the output with control unit 210
Sample rate adjust instruction display to the user that, and the instruction of user is transmitted to GNSS core board 300.
3) GNSS core board 300
The mainboard of GNSS instrument, for realizing the observing function of GNSS instrument.Can be with low sampling rate 15 seconds, 30 seconds low
Sampling configuration works, it is also possible to be not less than the high sampling configuration work of sample rate 10Hz.Possesses the function of multi-sampling rate work.
3rd, working mechanism
1) purpose of the system is integrated with GNSS using accelerometer, reaches automatically and judges whether monitored area occurs
Earthquake, so as to automatically or manually change GNSS sampling configuration, and realizes the switching of both of which by remote monitoring.
2) occur in judgment means 100 in earthquake, accelerometer exports the acceleration signal of 3 components with the precision of 1mg, touch
Send out condition judgment unit 120 to judge in acceleration signal, to have or not seismic signal using long signal extracting algorithm in short-term.
3) in GNSS sampling configuration switching device 200, instruction transmission will be judged according to trigger condition with control unit 210
The sample frequency of the output result change GNSS core board 230 of unit 120, and report to the police to user；User can pass through remote monitoring
Unit 220 changes sample rate, enters artificial mode；After upper once trigger or switch mode start 2 hours, bar is triggered
Part judging unit 120 output recover signal to instruct transmission with control unit 210 by the sample rate of GNSS core board 230 turn down to
Routine observation frequency.
(1) instruction transmission and control unit 210
The trigger of 120 output of trigger condition judging unit is received, is transmitted to GNSS core board 230 and sample rate is heightened
Instruction to 10Hz；And while alarm command is exported to remote monitoring unit 220；
Instruction transmission receives the recovery signal of 120 output of trigger condition judging unit with control unit 210, to GNSS core
Plate 230 transmits sample rate to be turned down to the instruction of 30sec.
(2) remote monitoring unit 220
Show 120 output result of trigger condition judging unit to user, and user is may be selected using remote monitoring unit 220
Independently sample rate change directive is transmitted to high frequency GNSS core board 230, priority level is referred to control unit 210 higher than instruction transmission
Order.Handoff procedure starts.Remote monitoring unit 220 is transmitted to high frequency GNSS core board 230 after handoff procedure starts 2 hours
Sample rate is turned down to the instruction of 30sec.
2nd, method
Such as Fig. 2, the workflow of trigger condition judging unit 120 are as follows：
A, accelerogram -11
Trigger condition judging unit 120 receives the acceleration signal that accelerogram unit 110 sends；
B, the characteristic function -12 of calculating STA and LTA
The characteristic function of STA and LTA is：
CF (i)=f (i)2+k[f(i)-f(i-1)]2
F (x) is earthquake original time series, and k is weight factor；
STAi=STAi-1+c3(CFi-STAi-1) 0.2 ＜ c3＜ 0.8
LTAi=LTAi-1+c4(CFi-LTAi-1) 0.005 ＜ c4＜ 0.05；
C, calculating STA/LTA-13
D, STA/LTA is judged whether more than threshold values -14, be then entrance step E, otherwise stop -17；
E, transmission trigger -15；
F, delay send return signal -16 in 2 hours.
Claims (3)
1. a kind of GNSS is used for the variable sampling system of seismic monitoring, it is characterised in that：
The system includes target GNSS core board (300)；
It is provided with earthquake and judgment means (100) and GNSS sampling configuration switching device (200) occurs；
Described earthquake occurs judgment means (100) to include that front latter linked accelerogram unit (110) and trigger condition are sentenced
Disconnected unit (120)；Accelerogram unit (110) includes front latter linked accelerometer (111) and first memory (112)；
Trigger condition judging unit (120) includes digital signal processing chip (121), single-chip microcomputer (122) and the clock being sequentially connected
(123)；
Described GNSS sampling configuration switching device (200) includes instruction transmission and control unit (210) and remote monitoring unit
(220)；Instruction transmission includes front latter linked programmable gate array (211) and second memory with control unit (210)
(212)；Remote monitoring unit (220) includes network interface card (221) and monitor client (222)；
Its annexation is：
Accelerometer (111), digital signal processing chip (121), single-chip microcomputer (122), programmable gate array (211) and
GNSS core board (300) is sequentially connected；Programmable gate array (211), network interface card (221), monitor client (222) and GNSS
Core board (300) is sequentially connected.
2. the variable sampling method based on system described in claim 1, it is characterised in that comprise the following steps：
1. accelerogram unit exports the three-component acceleration signal of X, Y, Z, and trigger condition judging unit is calculated using STA/LTA
Method compare the short time average STA of acceleration signal and signal long when mean value LTA judging the generation of earthquake；Work as STA/
The value of LTA more than threshold values when, trigger condition judging unit exports trigger, and sends two hours in upper once trigger
Hou Hou, output recover signal, realize the automatic identification function to seismic events；
2. instruction transmission receives, with control unit, the trigger that trigger condition judging unit is exported, will to the transmission of GNSS core board
Sample rate is heightened to the instruction of 10Hz；After signal is recovered, turn down to the instruction of 30sec to GNSS core board transmission sample rate,
Realize the variable sampling system under automatic mode；
3. instruction transmission with control unit receive trigger while, to remote monitoring unit export alarm command；Long-range prison
Control unit shows trigger condition judging unit output result to user, and user can be independent to high frequency using remote monitoring unit
GNSS core board transmits sample rate change directive, and priority level is higher than instruction transmission and control unit instruction, remote monitoring unit
After handoff procedure starts 2 hours, turn down to the instruction of 30sec to high frequency GNSS core board transmission sample rate, realize variable adopting
The automatic mode of sample rate system and the switching of artificial mode.
3. the variable sampling method as described in claim 2, it is characterised in that the workflow of trigger condition judging unit 120 is such as
Under：
A, accelerogram (11)
Trigger condition judging unit (120) receives the acceleration signal that accelerogram unit (110) sends；
B, the characteristic function (12) of calculating STA and LTA
The characteristic function of STA and LTA is：
CF (i)=f (i)2+k[f(i)-f(i-1)]2
F (x) is earthquake original time series, and k is weight factor；
STAi=STAi-1+c3(CFi-STAi-1) 0.2 ＜ c3＜ 0.8
LTAi=LTAi-1+c4(CFi-LTAi-1) 0.005 ＜ c4＜ 0.05；
C, calculating STA/LTA (13)；
D, STA/LTA is judged whether more than threshold values (14), be then entrance step E, otherwise stop -17；
E, transmission trigger (15)；
F, delay send return signal (16) in 2 hours.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107479094A (en) * | 2017-09-18 | 2017-12-15 | 辽宁工程技术大学 | A kind of method for realizing earthquake pre-warning |
| CN107576988A (en) * | 2017-09-29 | 2018-01-12 | 中国科学院地质与地球物理研究所 | A kind of spaceborne magnetometer sample rate automatic switching method and device |
| CN110109168A (en) * | 2019-05-23 | 2019-08-09 | 广东星舆科技有限公司 | A kind of monitoring method and monitoring system of the variation of antenna for base station pose |
| CN113126143A (en) * | 2021-04-22 | 2021-07-16 | 中国科学院、水利部成都山地灾害与环境研究所 | Portable micro-motion and strong-vibration real-time monitor system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107479094A (en) * | 2017-09-18 | 2017-12-15 | 辽宁工程技术大学 | A kind of method for realizing earthquake pre-warning |
| CN107576988A (en) * | 2017-09-29 | 2018-01-12 | 中国科学院地质与地球物理研究所 | A kind of spaceborne magnetometer sample rate automatic switching method and device |
| CN110109168A (en) * | 2019-05-23 | 2019-08-09 | 广东星舆科技有限公司 | A kind of monitoring method and monitoring system of the variation of antenna for base station pose |
| CN113126143A (en) * | 2021-04-22 | 2021-07-16 | 中国科学院、水利部成都山地灾害与环境研究所 | Portable micro-motion and strong-vibration real-time monitor system |
| CN113126143B (en) * | 2021-04-22 | 2022-11-15 | 中国科学院、水利部成都山地灾害与环境研究所 | Portable real-time micro-motion and strong vibration monitor system |
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