CN102183785A - Multi-redundant synchronous data acquiring device and method of non-cable seismograph - Google Patents
Multi-redundant synchronous data acquiring device and method of non-cable seismograph Download PDFInfo
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Abstract
The invention discloses a multi-redundant synchronous data acquiring device and method of a non-cable seismograph. The method is a multi-redundant synchronous data acquiring method of a non-cable seismograph based on a UTC (universal time coordinated) time system, and comprises the following steps: through introducing a local auxiliary UTC time service system and combining a GNSS (global navigation satellite system) time service technology, constructing a multi-redundant TUC time service system so as to guarantee that a non-cable seismograph acquiring station can synchronize the data acquisition under the condition of loading a GNSS time service signal; before acquiring the seismic data, firstly timing the local UTC, selecting one of continuous record or UTC time interval or UTC time point to set a synchronous acquiring task so as to generate a synchronous data acquiring task list; and marking the UTC time scale information on the acquired seismic data according to the UTC time service information, storing in a local memory, and finally obtaining a complete synchronous single shot record. The synchronous seismic data can be acquired by the non-cable seismograph acquiring station under any severe satellite signal condition by using the acquiring device and the acquiring method; and the synchronous precision is superior to 4 microseconds, and the synchronous requirement of resource exploration is completed satisfied.
Description
Technical field:
The present invention relates to the no cable telemetric seismic instrument in a kind of geophysical survey, especially relating in the no cable memory-type seismograph with the UTC Universal Time Coordinated is that many redundant datas of synchronous base are gathered method for synchronous.
Background technology:
Simulated earthquake instrument, centralized seismograph, modern three big stages of distributed telemetric seismic instrument have been experienced in the seismograph development, current main flow seismograph is the wire-link telemetry seismograph, and its typical case representative is 408UL, the 428XL of French Sercel company and the Scorpion seismic prospecting system of American I N company.With 428XL is example, modern telemetric seismic instrument adopts the wired connection client/server, measuring system by master station (control and management overall measurement workflow), intersect station (transmitting measuring command and data), acquisition station (seismic data acquisition unit) and power supply station (power supply unit) and form.Thousands of up to ten thousand earthquake-capturing stations link together by data transmission cable, and link to each other with intersecting to stand, and the intersection station links to each other with main frame by cable, constitutes a geological data Measurement Network.The earthquake-capturing station is " single station single track " structure, a seismic sensor (vibro-pickup is responsible at a station, claim seismoreceiver again) collection of simulant signal, the sum of all acquisition stations is the total data of measuring system and gathers the road number, and seismic prospecting requires the log-on data collection synchronously of all acquisition channels.428XL is in order to realize the synchronous data collection of all acquisition channels, in data transmission cable, set special-purpose acquisition and synchronizing signal and made up synchronization mechanism, acquisition and the synchronizing signal that send by data transmission cable line monitoring master station at all earthquake-capturing stations, acquisition station is log-on data collection immediately after detecting synchronizing signal, thereby realizes the synchronous data collection of all acquisition channels.After acquisition station is finished data acquisition, by the data transmission cable line data are sent to master station, master station receives the also geological data of all acquisition station synchronous acquisition of playback, monitors collection result in real time and deposits hard disk in.The seismographic advantage of modern wire-link telemetry is that data communication speed is fast, road load capacity height, has obtained using widely; But for the earthquake data acquisition under the complex-terrain surface conditions, as mountain region, loess gully district etc., the wire-link telemetry seismograph is owing to the constraint of cable, and inconvenience is big in surface relief, the area construction of ravines and guillies criss-cross.In order to solve the earthquake data acquisition problem in complex-terrain area, can adopt the earthquake-capturing station structure of no cable memory-type, cable is broken away from the earthquake-capturing station, the geological data of field acquisition is stored in the internal non-volatile memory, thereby adapt to the data acquisition of complex area, Here it is no cable telemetric seismic instrument.No cable telemetric seismic instrument is in order to need a kind of common Time Service System synchronously.
Current, no cable telemetric seismic instrument adopts the time service of gps satellite positioning system as Time Service System usually, CN01134726.0 discloses a kind of " gps satellite time service telemetering seismograph " and CN200910169540.1 discloses, and a kind of " method and the short message control and transmission type of utilizing note to carry out seismograph control and data transmission do not have the cable seismograph " all adopts the gps satellite time service as synchronous clock, and then realizes the synchronous data collection between many earthquake-capturings station.But, near the mountain, under the relatively poor condition of satellite-signal such as the dense area of jungle, GPS positioning system time service information can not obtain, or, reason gps signal losing locks such as electromagnetic interference (EMI) can't realize synchronous data collection because of may causing a collection of acquisition station, make that whole acquisition system can't operate as normal and then paralyse, this has limited the seismographic application of no cable to a great extent.
Summary of the invention:
Purpose of the present invention is exactly at above-mentioned the deficiencies in the prior art, provides a kind of no cable seismograph how redundant synchronous data collection device;
The purpose of this invention is to provide the how redundant synchronous data collection method of a kind of no cable seismograph.
The objective of the invention is to be achieved through the following technical solutions:
The how redundant synchronous data collection device of no cable seismograph, be to connect 1-128 no cable seismograph acquisition station one to one through the 1-128 of school clock controller interface by PC, 1 power supply adaptor 1-128 that is connected in parallel does not have cable seismograph acquisition station, the GNSS receiver module is through bus driver 1-128 the Bussing connector that be connected in parallel, and 1-128 Bussing connector connects 1-128 no cable seismograph acquisition station one to one.
Acquisition station is to connect CF card, GPS receiver, Ethernet interface and synchronous DRAM respectively by the ARM-Linux system, the ARM-Linux system is connected with the simulated modulation circuit through programmable logic device (PLD), programmable logic device (PLD) connects GPS receiver pulse per second (PPS) output terminal, constant-temperature crystal oscillator linking number character filter and programmable logic device (PLD), the four-way analog input connects and composes through simulated modulation circuit, Δ ∑ modulator and digital filter and programmable logic device (PLD).
Acquisition station school clock controller is by the GNSS receiver module, FPGA intelligence clock system, crystal oscillator and acquisition station master control and acquisition system constitute, GNSS receiver module time service information is connected through the output of COM2 mouth and with acquisition station master control system and acquisition system, GNSS synchronization pulse CLK2 is connected with acquisition station master control and acquisition system with self-lock controller, FPGA intelligence clock system is by self-lock controller, frequency divider, Gregorian calendar clock intelligent counter, SPI interface and put the digital-to-analogue piece and constitute, put the school clock information that reception acquisition station master control of digital-to-analogue piece and acquisition system send through the CRL2 mouth, and insert Gregorian calendar clock counter, self-lock controller, frequency divider and crystal oscillator constitute the counting gauge tap of Gregorian calendar clock counter, control through CRL1 by acquisition station master control and acquisition system, Gregorian calendar clock intelligent counter synchronizing pulse CLK1 is connected with acquisition station master control and acquisition system, and the time service information of Gregorian calendar clock intelligent counter passes through the SPI interface conversion after COM port or COM device or COM1 is connected with acquisition station master control and acquisition system.
The acquisition station synchronous data collection is respectively through Δ ∑ modulator I linking number character filter by analog channel 1 and analog channel 2, analog channel 3 and analog channel 4 are respectively through Δ ∑ modulator II linking number character filter, and external sync clock, crystal oscillator linking number character filter respectively constitute.
The acquisition station master control is to trigger controller through multipath clock switch, self-locking by local UTC Time Service System respectively with receiver module to be connected with master control system with data acquisition system (DAS) with acquisition system, master control system is connected with the multipath clock switch, and master control system connects local UTC Time Service System respectively and receiver module constitutes.
The how redundant synchronous data collection method of no cable seismograph comprises following order and step:
A, before carrying out earthquake data acquisition, during at first to local UTC timekeeping system school, be referenced as the UTC time service information of GNSS during its school;
Export the positive pulse of a fixed width after b, GNSS receiver module are located successfully p.s., CLK2 is the second synchronizing pulse train of GNSS receiver module output, and its rising edge identifies this second in the initial moment; COM2 follows output UTC time service information after each second synchronizing pulse;
C, acquisition station master control system are at first controlled self-lock controller and are closed the output of frequency divider clock, make Gregorian calendar clock counter be in halted state, then in t
2An extraction UTC time in the moment inserts in the Gregorian calendar clock counter after also this time being added 1 second, opens self-lock controller after setting completed in the time;
The next second synchronizing pulse of d, GNSS receiver module can cause the counter-rotating of self-locking flip-flop states, and frequency divider is in t
3Constantly start elapsed time clock CP output, drive Gregorian calendar clock counter and UTC time reference time synchronisation, from t
4Play output high precision synchronizing pulse second CLK1 constantly.Gregorian calendar clock timer temporal information is by the output of SPI interface, and collaborative CLK1 signal provides high precision standby markers for acquisition station;
E, selection continuous recording or one of UTC time interval or three kinds of patterns of UTC time point are carried out the synchronous acquisition task setting, generate the synchronous data collection task list;
F, the no cable seismograph of laying are in the work-yard, no cable seismograph at first detects GNSS time service synchronized clock system by special device, if satellite-signal is effective, then adopt the reference synchronization source of GNSS time service synchronous clock, the acquisition tasks tabulation that implementation step e sets as Acquisition Circuit;
G, satellite-signal is detected,, switch the synchronous clock source, adopt the reference synchronization source of local UTC time system as Acquisition Circuit if satellite-signal is invalid by step f;
H, each earthquake acquisition station according to the UTC Time Service System time service information of self, are stamped UTC time scale information with the geological data that collects according to default task type and the autonomous implementation data acquisition tasks of task list, deposit local storage in;
I, all seismic-data traces of contained UTC time tag in the geological data are carried out absolute UTC time unifying, finally obtain complete synchronous single shot record.
Beneficial effect: the how redundant simultaneous techniques of no cable seismograph data acquisition can be guaranteed not have cable seismograph acquisition station and realize synchronous earthquake data acquisition under any abominable satellite-signal condition, and synchronization accuracy is better than 4 microseconds, satisfies the synchronous requirement of resource exploration fully.
Description of drawings:
Accompanying drawing 1 local UTC time system bus type is school clock controller structured flowchart in batches
Accompanying drawing 2 earthquake-capturing station structure block diagrams
Accompanying drawing more than 3 redundant UTC Time Service System structured flowcharts
Accompanying drawing 4 no cable seismograph acquisition station synchronous data collection circuit structure block diagrams
Accompanying drawing redundancy clock more than 5 commutation circuit structured flowchart
Accompanying drawing 6 local UTC time systems are to the clock sequential chart
Embodiment:
Be described in further detail below in conjunction with drawings and Examples:
The how redundant synchronous data collection device of no cable seismograph, be to connect 1-128 no cable seismograph acquisition station one to one through the 1-128 of school clock controller interface by PC, 1 power supply adaptor 1-128 no cable seismograph acquisition station that be connected in parallel, the GNSS receiver module is through bus driver 1-128 the Bussing connector that be connected in parallel, and 1-128 Bussing connector connects 1-128 no cable seismograph acquisition station one to one.
Acquisition station is to connect CF card, GPS receiver, Ethernet interface and synchronous DRAM respectively by the ARM-Linux system, the ARM-Linux system is connected with the simulated modulation circuit through programmable logic device (PLD), programmable logic device (PLD) connects GPS receiver pulse per second (PPS) output terminal, constant-temperature crystal oscillator linking number character filter and programmable logic device (PLD), the four-way analog input connects and composes through simulated modulation circuit, Δ ∑ modulator and digital filter and programmable logic device (PLD).
Acquisition station school clock controller is by the GNSS receiver module, FPGA intelligence clock system, crystal oscillator and acquisition station master control and acquisition system constitute, GNSS receiver module time service information is connected through the output of COM2 mouth and with acquisition station master control system and acquisition system, GNSS synchronization pulse CLK2 is connected with acquisition station master control and acquisition system with self-lock controller, FPGA intelligence clock system is by self-lock controller, frequency divider, Gregorian calendar clock intelligent counter, SPI interface and put the digital-to-analogue piece and constitute, put the school clock information that reception acquisition station master control of digital-to-analogue piece and acquisition system send through the CRL2 mouth, and insert Gregorian calendar clock counter, self-lock controller, frequency divider and crystal oscillator constitute the counting gauge tap of Gregorian calendar clock counter, control through CRL1 by acquisition station master control and acquisition system, Gregorian calendar clock intelligent counter synchronizing pulse CLK1 is connected with acquisition station master control and acquisition system, and the time service information of Gregorian calendar clock intelligent counter passes through the SPI interface conversion after COM port or COM device or COM1 is connected with acquisition station master control and acquisition system.
The acquisition station synchronous data collection is respectively through Δ ∑ modulator I linking number character filter by analog channel 1 and analog channel 2, analog channel 3 and analog channel 4 are respectively through Δ ∑ modulator II linking number character filter, and external sync clock, crystal oscillator linking number character filter respectively constitute.
The acquisition station master control is to trigger controller through multipath clock switch, self-locking by local UTC Time Service System respectively with receiver module to be connected with master control system with data acquisition system (DAS) with acquisition system, master control system is connected with the multipath clock switch, and master control system connects local UTC Time Service System respectively and receiver module constitutes.
The how redundant synchronous data collection method of no cable seismograph comprises following order and step:
A, before carrying out earthquake data acquisition, during at first to local UTC timekeeping system school, be referenced as the UTC time service information of GNSS during its school;
Export the positive pulse of a fixed width after b, GNSS receiver module are located successfully p.s., CLK2 is the second synchronizing pulse train of GNSS receiver module output, and its rising edge identifies this second in the initial moment; COM2 follows output UTC time service information after each second synchronizing pulse;
C, acquisition station master control system are at first controlled self-lock controller and are closed the output of frequency divider clock, make Gregorian calendar clock counter be in halted state, then in t
2An extraction UTC time in the moment inserts in the Gregorian calendar clock counter after also this time being added 1 second, opens self-lock controller after setting completed in the time;
The next second synchronizing pulse of d, GNSS receiver module can cause the counter-rotating of self-locking flip-flop states, and frequency divider is in t
3Constantly start elapsed time clock CP output, drive Gregorian calendar clock counter and UTC time reference time synchronisation, from t
4Play output high precision synchronizing pulse second CLK1 constantly.Gregorian calendar clock timer temporal information is by the output of SPI interface, and collaborative CLK1 signal provides high precision standby markers for acquisition station;
E, selection continuous recording or one of UTC time interval or three kinds of patterns of UTC time point are carried out the synchronous acquisition task setting, generate the synchronous data collection task list;
F, the no cable seismograph of laying are in the work-yard, no cable seismograph at first detects GNSS time service synchronized clock system by special device, if satellite-signal is effective, then adopt the reference synchronization source of GNSS time service synchronous clock, the acquisition tasks tabulation that implementation step e sets as Acquisition Circuit;
G, satellite-signal is detected,, switch the synchronous clock source, adopt the reference synchronization source of local UTC time system as Acquisition Circuit if satellite-signal is invalid by step f;
H, each earthquake acquisition station according to the UTC Time Service System time service information of self, are stamped UTC time scale information with the geological data that collects according to default task type and the autonomous implementation data acquisition tasks of task list, deposit local storage in;
I, all seismic-data traces of contained UTC time tag in the geological data are carried out absolute UTC time unifying, finally obtain complete synchronous single shot record.
The many redundant seismic data acquisition methods synchronously of no cable seismograph based on the UTC time system, by introducing local auxiliary UTC (universal coordinated time) Time Service System, in conjunction with GNSS (GLONASS (Global Navigation Satellite System)) Service of Timing, make up many redundant UTC Time Service System, to guarantee that no cable seismograph acquisition station still can synchronous data collection under the situation that loses the GNSS time signal.
No cable seismograph acquisition station is a time standard with the UTC time, by time section, time point or the continuous recording start time of appointment, is the additional time scale information of the geological data of field acquisition; After data reclaim, adopt special synchronizing software again, with data syncization, systematization.
Local UTC Time Service System by special use integrated chip able to programme, design a calendar year calendar clock, can carry out calendar year accurate timing when walking, and possesses clocking informations such as year, month, day, hour, min, second, week, possesses leap year calculating debugging functions; Synchronizing signal second of output simultaneously.For guaranteeing the precision of local UTC time system, guarantee the degree of accuracy of its initial time on the one hand, adopt the crystal oscillator of high stability on the other hand, improve its timekeeping performance.Its initial time precision by the school clock network of GNSS time service device structure bus type, can be carried out the school clock of each maximum 128 acquisition stations in batches, makes its initial moment synchronous with international standard UTC; The timekeeping performance of local calendar clock depends on the precision of local crystal oscillator, its error is progressively accumulated when walking the time, accumulate time error in the scope of a permission for controlling local calendar clock, adopt " during the periodicity school " mode of operation: no cable seismograph is carried out before the acquisition tasks every day, at first by clock network school, school clock, it walks time error with regard to may command within the specific limits in continuously maximum n hour thereafter then.Through textual criticism, adopt 10
-10The crystal oscillator of degree of stability is as the clock source of calendar clock, and the cumulative maximum error in 10 hours is 3.6 microseconds, can reach resource exploration field demands of applications fully.
Do not stamp the UTC markers in order there to be the geological data that cable seismograph acquisition station collects, designed the UTC clock synchronization circuit, the core of two CS5372 and a slice CS5376 composition data Acquisition Circuit, local UTC time system or GNSS system second synchronizing signal as the synchronisation source of acquisition station, mode log-on data Acquisition Circuit running with external break events finally realizes the synchronous data collection of a plurality of acquisition stations; Two synchronous clock sources are each other after school clock once in 10 hours of regulation, its synchronism can satisfy the requirement of resource exploration, it is the two synchronous clock source that all can be used as Acquisition Circuit, but, preferentially adopt the GNSS time signal as data acquisition synchronous clock source in the GNSS satellite-signal time spent; In addition, still can the synchronous acquisition data in order to lose after the satellite-signal system because of external cause at GNSS, designed the synchronous clock commutation circuit, in time the synchronizing signal with data acquisition circuit switches to standby local UTC time system.
By above-mentioned how redundant UTC simultaneous techniques, GNSS time dissemination system and local UTC time system are as the synchronous clock source of two complementations, can guarantee the GNSS satellite-signal effectively and the GNSS receiving system lose the synchronism that all can guarantee the acquisition station data acquisition under two kinds of situations of satellite-signal, reach the purpose of reliable synchronization.
The present invention is based on coordinate universal time and makes up the local UTC Time Service System of no cable seismograph acquisition station, the how redundant UTC Time Service System of the formation that combines with the GNSS time dissemination system, for the acquisition station earthquake data acquisition provides reliable synchronous clock, guarantee that all earthquake-capturing station data acquisitions are synchronous.Wherein the GNSS time dissemination system adopts as preferential clock source when the GNSS satellite-signal is effective as main synchronous clock source; Local UTC time timekeeping system adopted when the GNSS satellite-signal loses efficacy as standby synchronous clock source.
No cable seismograph acquisition station field construction adopts default task list mode, and task type comprises continuous recording, UTC time interval and UTC time point isotype.Each earthquake acquisition station according to the UTC Time Service System time service information of self, is stamped UTC time scale information with the geological data that collects according to default task type and the autonomous implementation data acquisition tasks of task list, deposits local storage in.
No cable seismograph acquisition station many redundancy times service system as shown in Figure 1, the time service via satellite of GNSS receiver module, can export the UTC temporal information, and be aided with a second synchronizing signal, constitute the main Time Service System at earthquake-capturing station, it depends on the quality of work-yard satellite-signal, when the place satellite-signal is effective, preferentially adopts this synchronous clock source; Local UTC timekeeping system is shown in Fig. 1 frame of broken lines, by Gregorian calendar clock intelligent counter, crystal oscillator, frequency divider, self-lock controller, put the digital-to-analogue piece, the SPI interface is formed, crystal oscillator produces the high precision oscillator signal, behind the frequency divider frequency division as the work clock of Gregorian calendar clock intelligent counter, Gregorian calendar clock intelligent counter is finished the clocking capability of date, Hour Minute Second, and output second synchronizing signal; Self-lock controller, when putting the digital-to-analogue piece and being used for the school; The SPI interface is used to export Gregorian calendar temporal information, its with second synchronizing signal CLK2 constitute the standby time system at earthquake-capturing station, when the GNSS satellite-signal is invalid, provide UTC synchronizing information.In continuous 10 hours scopes after when effective period of service of local UTC timekeeping system is once the school.
Before carrying out earthquake data acquisition, during at first to local UTC timekeeping system school, be referenced as the UTC time service information of GNSS during its school.Process is exported the positive pulse of a fixed width p.s. as shown in Figure 2 during the school after the GNSS receiver is located successfully, and CLK2 is the second synchronizing pulse train of GNSS receiver output, and its rising edge identifies this second in the initial moment; COM2 follows output UTC time service information after each second synchronizing pulse.The acquisition station master control system is at first controlled self-lock controller and is closed the output of frequency divider clock, makes Gregorian calendar clock counter be in halted state, then in t
2An extraction UTC time in the moment inserts in the Gregorian calendar clock counter after also this time being added 1 second, opens self-lock controller after setting completed in the time; The next second synchronizing pulse of GNSS receiver can cause the counter-rotating of self-locking flip-flop states, and frequency divider is in t
3Constantly start elapsed time clock CP output, drive Gregorian calendar clock counter and UTC time reference time synchronisation, from t
4Play output high precision synchronizing pulse second CLK1 constantly.Gregorian calendar clock timer temporal information is by the output of SPI interface, and collaborative CLK1 signal provides high precision standby markers for acquisition station.
Efficient during for the raising school, controller when having designed the batch school, its structure is as shown in Figure 3.Reference clock when being the school with a GNSS receiver module, bus when making up the school by bus driver; Network when each earthquake acquisition station inserts the school by Bussing connector.Controller links to each other with exterior PC during the school, instructs when its receives from the school of PC computer, and when switch carries out the school when controlling corresponding acquisition station and opening the school, and state returns to PC during high-ranking officers; Each acquisition station is finished this process successively, the purpose when reaching quick school.
No cable seismograph acquisition station after during through the school, monitor the satellite-signal state of GNSS receiver in real time, when satellite-signal is effective, with the GNSS time dissemination system is the synchronous clock source of acquisition station, handle default task list one by one, by the system for acquiring seismic data that second, the synchronizing signal triggering was made of CS5372 and CS5376, circuit structure as shown in Figure 4; When the GNSS satellite-signal is lost, immediately enable local calendar clock timer, clock switch circuit as shown in Figure 5, the acquisition station master control system determines after satellite-signal loses, by the multipath clock switch with set the synchronous refernce clocks source of Acquisition Circuit from the lock control trigger.
No cable seismograph acquisition station is finished after the corresponding data acquisition task by default task list, and geological data is recovered to the mass memory unit of workstation by special-purpose retracting device.By extracting the UTC synchronous time mark information in each acquisition station geological data file, the geological data of all acquisition stations is carried out the alignment of UTC absolute time, just can obtain complete synchronous single shot record.
Claims (6)
1. how redundant synchronous data collection device of no cable seismograph, it is characterized in that, be to connect 1-128 no cable seismograph acquisition station one to one through the 1-128 of school clock controller interface by PC, 1 power supply adaptor 1-128 no cable seismograph acquisition station that be connected in parallel, the GNSS receiver module is through bus driver 1-128 the Bussing connector that be connected in parallel, and 1-128 Bussing connector connects 1-128 no cable seismograph acquisition station one to one.
2. according to the how redundant synchronous data collection device of the described no cable seismograph of claim 1, it is characterized in that, acquisition station is to connect the CF card respectively by the ARM-Linux system, the GPS receiver, Ethernet interface and synchronous DRAM, the ARM-Linux system is connected with the simulated modulation circuit through programmable logic device (PLD), programmable logic device (PLD) connects GPS receiver pulse per second (PPS) output terminal, constant-temperature crystal oscillator linking number character filter and programmable logic device (PLD), the four-way analog input is through the simulated modulation circuit, Δ ∑ modulator and digital filter and programmable logic device (PLD) connect and compose.
3. according to the how redundant synchronous data collection device of the described no cable seismograph of claim 1, it is characterized in that, acquisition station school clock controller is by the GNSS receiver module, FPGA intelligence clock system, crystal oscillator and acquisition station master control and acquisition system constitute, GNSS receiver module time service information is connected through the output of COM2 mouth and with acquisition station master control system and acquisition system, GNSS synchronization pulse CLK2 is connected with acquisition station master control and acquisition system with self-lock controller, FPGA intelligence clock system is by self-lock controller, frequency divider, Gregorian calendar clock intelligent counter, SPI interface and put the digital-to-analogue piece and constitute, put the school clock information that reception acquisition station master control of digital-to-analogue piece and acquisition system send through the CRL2 mouth, and insert Gregorian calendar clock counter, self-lock controller, frequency divider and crystal oscillator constitute the counting gauge tap of Gregorian calendar clock counter, control through CRL1 by acquisition station master control and acquisition system, Gregorian calendar clock intelligent counter synchronizing pulse CLK1 is connected with acquisition station master control and acquisition system, and the time service information of Gregorian calendar clock intelligent counter passes through the SPI interface conversion after COM port or COM device or COM1 is connected with acquisition station master control and acquisition system.
4. according to the how redundant synchronous data collection device of the described no cable seismograph of claim 2, it is characterized in that, the acquisition station synchronous data collection is respectively through Δ ∑ modulator I linking number character filter by analog channel 1 and analog channel 2, analog channel 3 and analog channel 4 are respectively through Δ ∑ modulator II linking number character filter, and external sync clock, crystal oscillator linking number character filter respectively constitute.
5. according to the how redundant synchronous data collection device of the described no cable seismograph of claim 3, it is characterized in that, the acquisition station master control is to trigger controller through multipath clock switch, self-locking by local UTC Time Service System respectively with the GNSS receiver module to be connected with master control system with data acquisition system (DAS) with acquisition system, master control system is connected with the multipath clock switch, and master control system connects local UTC Time Service System respectively and receiver module constitutes.
6. according to the how redundant synchronous data collection method of the described no cable seismograph of claim 1, it is characterized in that, comprise following order and step:
A, before carrying out earthquake data acquisition, during at first to local UTC timekeeping system school, be referenced as the UTC time service information of GNSS during its school;
Export the positive pulse of a fixed width after b, GNSS receiver module are located successfully p.s., CLK2 is the second synchronizing pulse train of GNSS receiver module output, and its rising edge identifies this second in the initial moment; COM2 follows output UTC time service information after each second synchronizing pulse;
C, acquisition station master control system are at first controlled self-lock controller and are closed the output of frequency divider clock, make Gregorian calendar clock counter be in halted state, then in t
2An extraction UTC time in the moment inserts in the Gregorian calendar clock counter after also this time being added 1 second, opens self-lock controller after setting completed in the time;
The next second synchronizing pulse of d, GNSS receiver module can cause the counter-rotating of self-locking flip-flop states, and frequency divider is in t
3Constantly start elapsed time clock CP output, drive Gregorian calendar clock counter and UTC time reference time synchronisation, from t
4Play output high precision synchronizing pulse second CLK1 constantly.Gregorian calendar clock timer temporal information is by the output of SPI interface, and collaborative CLK1 signal provides high precision standby markers for acquisition station;
E, selection continuous recording or one of UTC time interval or three kinds of patterns of UTC time point are carried out the synchronous acquisition task setting, generate the synchronous data collection task list;
F, the no cable seismograph of laying are in the work-yard, no cable seismograph at first detects GNSS time service synchronized clock system by special device, if satellite-signal is effective, then adopt the reference synchronization source of GNSS time service synchronous clock, the acquisition tasks tabulation that implementation step e sets as Acquisition Circuit;
G, satellite-signal is detected,, switch the synchronous clock source, adopt the reference synchronization source of local UTC time system as Acquisition Circuit if satellite-signal is invalid by step f;
H, each earthquake acquisition station according to the UTC Time Service System time service information of self, are stamped UTC time scale information with the geological data that collects according to default task type and the autonomous implementation data acquisition tasks of task list, deposit local storage in;
I, all seismic-data traces of contained UTC time tag in the geological data are carried out absolute UTC time unifying, finally obtain complete synchronous single shot record.
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