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
Technical field
The present invention relates to a kind of seismograph, particularly relating to a kind of method and short message control and transmission type of utilizing note to carry out seismograph control and data transmission does not have the cable seismograph.
Background technology
1, seismic instrument present situation
The high accuracy number seismograph is to be used for the artificial or earthquake signal of record, seek the exploration instrument for geology of oil, gas, coal and other mineral resources then according to the record of these seismic signals, and can be used for surveying earth ' s internal structure, carry out engineering and geological hazards prediction etc.
Method of seismic exploration remains the main means at land and seafari oil and natural gas at present, also be the important method of exploration of other mineral resources simultaneously, and be widely used in studying earth ' s internal structure, engineering exploration and aspects such as detection, geological hazards prediction.Its basic skills is to bury to put thousands of and even up to ten thousand seismic event sensors (being seismoreceiver) on the ground of exploration target area, at sea then be to float cable (floating cable), excite artificial earthquake with explosive or vibroseis (on land) or high-pressure airgun (at sea) then every seismoreceiver of tens of meters parcels with the long sea of the several 1-2km of sea exploration vessel drag and drop.Seismic event is propagated to deep under ground, the interphase that runs into the heterogeneity stratum will produce reflection, seismoreceiver picks up reflection wave and converts thereof into analog electrical signal, by high-precision digital seismograph these analog electrical signals is converted to digital signal record then and gets off.The mass data that ground observation receives is carried out complicated signal Processing and Inversion Calculation by indoor high-speed computer, just can obtain clear reliable underground structure image, finally determines the position and the degree of depth of mineral resources.
Digital seismograph with the mineral resources geophysical survey can be divided three classes according to data transfer mode: wire-link telemetry seismograph, wireless telemetering seismograph, no cable memory-type seismograph.
The seismographic feature of wire-link telemetry is to be sent instruction and transmitted image data by wired system fully.In present open-air practical application, occupy leading position, occupy most shares in seismograph market, the world, 408/428 series that Sercel company is arranged commonly used, System IV, the Scorpion of ION company and Aries II system, the Summit system of German DMT company, Uni Q system of U.S. WesternGeco company etc.Present instrument in China's oil and the use of gas prospecting industry greatly partly is the wire-link telemetry seismograph from external import.
The instrument that utilizes wireless system to send instruction and transmission image data is called the wireless telemetering seismograph, generally is used for surface condition construction down distinguishingly, also occupies certain market.The Wireless Seismic system of the BOX system of Fairfield company and Wireless Seismic company is the wireless telemetering digital seismograph.
Britain Vibtech company (by Sercel corporate buyout, developing into the Unite system) releases a kind of novel telseis instrument system---IT system first, called after " honeycomb earthquake " acquisition system.The wireless system that it is different from the past, IT system adopts the patented technology of cellular radio.Communicating by letter between remote control acquisition component (Remote Acquisition Unit-RAU) and their " local node " (local node) adopted the 2.4GHz ISM band that need not licence.When blowing out, IT system adopts cellular radio to come the remotely monitored sensor data to recording-member, and then by cable line geological data is delivered to central recording unit.
No cable memory-type seismograph is a kind of seismograph of specific type, it is characterized in that: do not have big line, do not have transmission of seismic data; Each acquisition station receives blows out storage automatically after the data, with special data recovery system all is blown out data again and takes out from acquisition station; There is the part instrument to utilize wireless system, but do not receive data, do not monitor the duty of acquisition station the order such as fire of used acquisition station.
No cable formula register system (directly writing down with the paper section in early days) is all adopted in the observation of the earthquake station, in field of seismic exploration, no cable system the earliest is the SGR (Seismic Group Recorder) of the seventies by the development of Amoco company, early stage SRG system is " blind putting (shoot blind) ", be in the surface units of SGR magnetic tape station to be installed, in case after surface units was laid, seismic data recording can't know whether surface units is working properly on tape.Though this method is not accepted by a lot of people, because he can obviously enhance productivity, at noontide, once has 20 field parties to equip this instrument.When " blind putting ", nearly 1% seismic trace had problem at that time, and this also allows in present wired system.
American I N company (former I/O company) released the long-range earthquake signal recorder of RSR (Remote Seismic Recorder) in 1999, can realize the earthquake data acquisition of 6 analog detector passages.The RSR system can with the IMAGE system compatible of ION company, the two can be formed wire and wireless and mix acquisition system.ION company 2002 with the remote logging instrument of RSR system upgrade to VectorSeis SYSTEM IV system, be called VRSR2.VectorSeis SYSTEMIV central control system has control module (being called V2), radio-frequency antenna, central transceiver and central transceiver controller to constitute.V2 by the data acquisition of acquisition instructions startup VRSR2 acquisition station, detects the state of VRSR2 by radio-frequency antenna and all VRSR2 formation radio-frequency (RF) telemetry system.Basic identical with function and the structure of RSR, but no longer support analog detector, but adopted three-component MEMS digital geophone.
No cable memory-type earthquake-capturing station is not owing to have real time monitoring record and on-the-spot quality monitoring means commonly used, so can't generally be accepted by industry member, using in China, existence does not meet problems such as Seismic Operation standard yet, up to the present, also not having cable memory-type earthquake-capturing stands in China and carries out actual seismic exploration.But because the accuracy requirement of seismic prospecting makes that the road number of seismic instrument is more and more, according to expert's estimation both at home and abroad, along with the demand of seismic prospecting precision, oil and gas industry circle needs the instrument of 30000 roads to 50000 roads soon, by 2025, perhaps we needed the earthquake-capturing instrument in 250,000 roads.And for the wired acquisition instrument more than 50000 roads, administering and maintaining of cable is very difficult, also needs to spend a large amount of costs.So it will be the developing direction of next step seismic prospecting instrument that at present a lot of scholarly forecasts do not have cable memory-type earthquake-capturing station.
Because the development of no cable memory-type seismic instrument is relatively easy, has many universities, research institution and company to carry out the development work at this kind earthquake-capturing station both at home and abroad at present.Domestic have the GPS time service seismograph of east geophysics company, the submarine seismograph and the metallic ore of Inst of Geology and Geophysics, Chinese Academy of Sciences to explore the no cable telemetric seismic instrument of no cable memory-type seismograph, Jilin University.There is the FireFly of American I N company not have cable seismic acquisition configuration, the Unite system of French Sercel company, the Ultra of U.S. Ascend Geo company abroad and do not have GSR (the Geospace Seismic Recorder) system of cable land seismic acquisition configuration, U.S. OYOGeospace company, the Z system of U.S. Firfield company, the Sigma system of U.S. Seismic Source company.
At present, all large-scale seismic prospecting instruments of China all depend on from developed country's imports such as the U.S., France.Because no cable memory-type earthquake-capturing station is not also accepted by China's geophysical survey circle, also there is not this seismograph of domestic enterprise procurement at present.Homemade no cable memory-type seismic instrument also is in the development stage, does not also have formal product to come out.
2, the weak point of not having cable memory-type seismic instrument now
Conventional no cable memory-type seismograph mainly is made up of control module, collecting unit, storage unit, time synchronized unit and power supply management control unit etc.Current no cable memory-type seismograph has following three big problems:
1. the seismographic acquisition station of most of no cable memory-type can not receive the control of steering order realization duty and duty is turned back to central station: as the GPS time service seismograph of east geophysics company, the submarine seismograph of Inst of Geology and Geophysics, Chinese Academy of Sciences and the no cable memory-type seismograph of metallic ore exploration, the no cable telemetric seismic instrument of Jilin University, the Unite system of France Sercel company (autonomous memory module), the GSR system of U.S. OYO Geospace company, the Z system of U.S. Firfield company, the Sigma system of U.S. Seismic Source company (autonomous type drainage pattern), and the FireFly of American I N company does not have the cable seismic acquisition configuration, the Sigma system (wireless network mode) that the U1tra of U.S. Ascend Geo company does not have cable land seismic acquisition configuration and U.S. Seismic Source company then adopts special-purpose wireless network to realize exciting synchronously and return the status information of acquisition station.
2. have or not the seismographic acquisition station of cable memory-type can not send data to the real-time quality control that central station is realized data: this is the difficult problem that up to the present can't solve.Do not have the real-time quality control of data, just can not know the quality of earthquake data acquisition at the scene, comprise whether the power, acquisition station work of excitation energy be normal, wave detector work is whether normal etc.In the construction in the open air, can excite hundreds of big gun record every day at present,, mend big gun again and will spend a large amount of man power and materials if after indoor playback, find that a large amount of malfunction data are arranged.So the construction method of this instrument is not also accepted by seismic prospecting circle of China.
3. it is synchronous that the GPS of acquisition station only is used for time service, most of conventional memory-type does not have that cable earthquake-capturing station does not position or bearing accuracy is not enough: because each acquisition station will carry out synchronous data collection, time service type GPS receiver can provide the output of 1pps time signal, can reach the precision of RMS20nS, be enough to satisfy the synchronization accuracy of instrument requirement.But because GPS single-point bearing accuracy is lower, be generally ± 10m, when having SA to influence be ± 100m, the accuracy requirement of seismic exploration contentedly.
Summary of the invention
The object of the invention is to overcome the above-mentioned defective of prior art, and a kind of method of utilizing note to carry out seismograph control and data transmission is provided, and the object of the invention also is to be provided for to implement the short message control and transmission type of this method does not have the cable seismograph.
For achieving the above object, the method that the present invention utilizes note to carry out seismograph control and data transmission is to introduce mobile phone unit in existing no cable ground instrument acquisition station, utilizes SMS that no cable seismograph acquisition station is carried out State Control and data transmission.It is to have introduced mobile phone unit with now not having the seismographic difference of cable both at home and abroad, solve no cable seismograph in the unusual mode of cheap and simple and do not had this difficult problem of real-time quality control, make that essential variation has taken place no cable seismograph, improved seismographic usable range of no cable and operating efficiency greatly.
As optimization,, realize cm level location by many GPS station co-located by the no cable ground instrument acquisition station that main control unit, collecting unit, storage unit, GPS unit, power supply management control unit and mobile phone unit are formed.It is to utilize many GPS station co-located technology to realize the centimetre-sized bearing accuracy.It is synchronous that acquisition station needs GPS to be used for time service, and time service type GPS receiver can provide the output of 1pps time signal, can reach the precision of RMS20nS, is enough to satisfy the synchronization accuracy of instrument requirement.Because GPS single-point bearing accuracy is lower, be generally ± 10m, when having SA to influence be ± 100m, and the positioning accuracy request of seismic prospecting is at decimeter grade, so can not meet the demands with single GPS location.And advantage of the present invention be tens or the scope of hundreds of square kilometre in, can lay hundreds of even several ten thousand GPS websites are measured, thereby form large-scale GPS station network, utilize this large-scale GPS network to carry out after measuring error eliminates, can reach the bearing accuracy of centimetre-sized.In a word, above-mentioned three big problems at existing conventional no cable memory-type seismograph existence, we introduce and utilize SMS that no cable seismograph (memory-type does not have the cable acquisition station) is carried out State Control and data transmission, utilize many GPS station co-located technology to realize cm level location, make no cable memory-type seismograph have the positioning function of State Control function, data transport functions and cm level, realize the seismographic update of no cable memory-type.
As optimization, no cable ground instrument acquisition station utilizes SMS to receive steering order and realizes the control of duty and duty is turned back to central station, and realizes the transmission of image data.
It is that the seismographic acquisition station of no cable comprises main control unit, collecting unit, storage unit, GPS unit and power supply management control unit that the short message control and transmission type that is used to implement the method for the invention does not have the cable seismograph, and its special feature is also to comprise by note no cable seismograph acquisition station is carried out the mobile phone unit that State Control and data transmit.We utilize SMS to finish SMS of data transport functions and can send 160 bytes, so can utilize SMS to realize the data or the wherein transmission and the transmission of partial data of whole trace record.At this moment exciting and when receiving the parameter test, need be sent to central station to the data of whole trace record before formal production can put in order the transmission of track data with a plurality of notes realizations.When formal production, in order to carry out quality monitoring, then can be only with note translator unit data or only the delivery quality monitor message get final product.
As optimization, described main control unit provides serial ports to be connected with the GPS unit with mobile phone unit respectively, provides the FIFO memory interface to connect collecting unit, and connects storage unit; Power supply management control unit provides the power supply support and carries out power supply management for mobile phone unit, GPS unit, collecting unit, main control unit and storage unit; It is synchronous that the GPS unit is used for time service, and realize cm level location by many GPS station co-located; Described collecting unit provides the analog detector signal input of 1~8 passage, and program is provided with the preamplification gain of 0dB, 6dB, 12dB, 18dB, 24dB, 30dB or 36dB, and realizes 4,2,1,0.5 or 0.25 sampling rate.Existing GPS unit is single GPS location, and bearing accuracy is lower, is generally ± 10m, contentedly the positioning accuracy request of seismic exploration (decimeter grade).And advantage of the present invention be tens or the scope of hundreds of square kilometre in, can lay hundreds of even several ten thousand GPS websites are measured, thereby form large-scale GPS station network, after utilizing this large-scale GPS network to carry out the measuring error elimination, can reach the bearing accuracy of centimetre-sized, thus the positioning accuracy request of seismic exploration contentedly.
As optimization, described collecting unit is made up of the digital filter and the measuring signal generator of the multi-way switch that can select input test signal or analog detector signal, prime amplifier, delta sigma modulator-demodular unit, connection main control unit; Multi-way switch select input from wave detector or from the signal of measuring signal generator, the signal of input sent into prime amplifier amplify, the delta sigma modulator-demodular unit will become digital signal through the analog signal conversion that prime amplifier amplifies, digital filter carries out Filtering Processing to the digital signal of conversion, and the input of the signal after will handling main control unit.
As optimization, prime amplifier is CS3301A or CS3302A type, and modulator-demodular unit is CS5371A or CS5372A type, and digital filter is the CS5376A type, and measuring signal generator is the CS4373A type.
As optimization, described mobile phone unit uses GSM, CDMA or 3G mobile chip, and is connected with main control unit with serial ports; The GPS unit adopts OEM GPS receiver module; Storage unit adopts the SD card of 8G; Described main control unit is made up of ARM series CPU, SDRAM storer, USB interface and Ethernet interface.
As optimization, mobile phone unit utilizes SMS to receive steering order and realizes the control of duty and duty is turned back to central station, and the transmission of realization image data, thereby realize that the steering order that receives command function and return the work state information function has:
(1) is used to open acquisition station, enter recording status, return the start-up command of open state: central station sends start-up command, acquisition station makes the acquisition station that is in dormant state enter recording status after receiving start-up command, the preparation for acquiring data, and return open state to central station, illustrate and start shooting successfully, and return information such as power supply status, storer remaining space.
(2) be used to make acquisition station to enter dormant state, wait for the dormancy instruction of start-up command: except that keeping CPU to be in minimum state under and keeping closing other all circuit, the wait start-up command mobile phone is under the holding state.
(3) be used to make acquisition station to enter off-mode, behind certain hour, enter the shutdown command of dormant state automatically: the free parameter T of shutdown command, expression is closed other all circuit except that maintenance CPU is under the holding state, after T minute, initiatively transfer dormant state to, wait for start-up command.
(4) acquisition parameter that is used for acquisition station is provided with acquisition parameter is provided with instruction: this instruction is provided with acquisition parameter to acquisition station, comprises sampling rate, record length, pregain, deposit data form etc.
(5) the regularly synchronous acquisition instruction of data that is used to notify acquisition station and blaster to enter regularly the synchronous acquisition state: this instruction has parameter T1, T2 and dT, and the order acquisition station carries out data acquisition by time interval dT, till the T2 time in the T1 time.T1, T2 are the time of Hour Minute Second form on days, and the unit of dT is second, when dT=0, continuously every continuous acquisition; When T1=T2, only gather once.
(6) be used for acquisition station and detect power supply status, and the power state indication of return results, return power supply status: central station sends the power supply status query statement, and acquisition station returns power supply status.Find power supply when power management module and can only work XXX minute the time that will send power supply status automatically to central station, wherein XXX can be in advance with the instruction setting.
(7) be used for acquisition station detection of stored device state, and the instruction of the memory state of return results, return memory state: central station sends the memory state query statement, and acquisition station returns storer remaining space state.
(8) be used for acquisition station synchronous acquisition gps coordinate, and return the GPS acquisition instructions of coordinate, return gps coordinate: central station sends the gps coordinate acquisition instructions, and all acquisition stations are convenient to the synchronous acquisition gps coordinate to handle in indoor many GPS station co-located of carrying out.
(9) be used for acquisition station and finish the collecting unit detection, the collecting unit of return results detects instruction, returns the collecting unit state: central station sends the collecting unit detection and instructs, and finishes collecting unit after acquisition station is received and detects, and return the collecting unit status information.
(10) data movement instruction that is used to that data layout is set and transmits data.
As optimization, described data movement instruction:
Parameter is arranged: F (sign), Data_Format_F (data layout sign), Trace_No1 (initial Taoist monastic name), Trace_No2 (end of a period Taoist monastic name), dNo (Taoist monastic name at interval), T1 (zero-time), T2 (finish-time), dT (sampling interval).
F (sign) is the data movement instruction identification code, (uses F by 2
1F
2Expression) form:
F
1=0 expression transmits the data of having gathered;
F
1=1 expression is provided with acquisition station, transmits the data that are about to collection;
F
2=0 expression transmits the data of whole trace record, and this moment, T1 and T2 can not fill out;
F
2=1 expression transmits the data from T1 to T2 in the record data;
F
2=2 expressions transmit the primary wave partial data in the record data, and this moment, T1 and T2 can not fill out.
F
2=9 expressions do not need that data are sent to central station and carry out quality monitoring, at this moment carry out quality control as long as transmit the energy value of per pass record, use this instruction, every note can transmit the energy value of 40 big guns record, can use this instruction when ordinary production and when very well.
The data layout identification code of Data_Format_F (data layout sign) for transmitting:
Data_Format_F=0 represents symbolization position transmission data, and this moment, a note can transmit 1280 data at most.
Data_Format_F=1 represents to adopt 1 byte to transmit data, and this moment, a note can transmit 160 data at most.
Data_Format_F=2 represents to adopt 2 bytes to transmit data, and this moment, a note can transmit 80 data at most.
Data_Format_F=3 represents to adopt 3 bytes to transmit data, and this moment, a note can transmit 53 data at most.
Data_Format_F=4 represents to adopt 4 bytes to transmit data, and this moment, a note can transmit 40 data at most.
Trace_No1 and Trace_No2 represent that respectively needs transmit the home record Taoist monastic name and the end of a period Taoist monastic name of data, and dNo represents that Taoist monastic name at interval.
T1, T2 are zero-time and the finish-times of representing respectively with number of samples, transmit data since T1 sampling point, and till T2 sampling point, dT represents to resample at interval.
The present invention utilizes SMS to control the seismographic acquisition station of no cable that transmits with data to be made up of six big units: main control unit, collecting unit, mobile phone unit, GPS unit, power supply management control unit and storage unit.With the seismographic difference of domestic and international no cable be to have introduced mobile phone unit, this makes that essential variation has taken place no cable seismograph, seismographic usable range of no cable and operating efficiency have been improved greatly, main advantage shows: (1) utilizes SMS that no cable seismograph is carried out data and transmits, thereby can satisfy the requirement of monitoring in real time of earthquake image data quality, this is that other no cable seismographs all do not have the difficult problem that solves, and the present invention has solved this difficult problem in the unusual mode of cheap and simple; (2) utilize SMS to finish the conversion of no cable earthquake-capturing station start, shutdown and dormant state, and can understand the power work state at any time, the loss that this greatly reduces power supply has prolonged working time of acquisition station; (3) utilize SMS to finish the synchronous acquisition of geological data, improve the dirigibility and the efficient of gathering greatly; (4) utilize SMS to finish the synchronous acquisition of gps data, be convenient to handle, and can know the position of acquisition station at any time, be convenient to search in indoor many GPS station co-located of carrying out; (5) utilize SMS to carry out acquisition station working state monitoring and setting, understand the duty of acquisition station at any time; (6) utilize SMS can utilize commercial network to carry out work, at this moment, can be arranged on controlling Anywhere and operating in the world to central station in principle.The special mobile base station that also can rent the vehicle-mounted mobile base station of commercial department or set up oneself is conveniently to manage, to raise the efficiency and to save cost.
After adopting technique scheme, the present invention utilizes note to carry out the method for seismograph control and data transmission and short message control and transmission type not to be had the cable seismograph and compares with existing no cable seismograph technology and have significant seismic prospecting construction process advantage, can be suitable for recording geometry method for designing more flexibly, can transmit all or part image data in experimental stage, carry out the real time data analysis; Have and to reduce the surveying work amount, lay collecting device flexible and convenient more, the convenient synchronous acquisition pattern of regularly blowing out that adopts, help improving operating efficiency, data collection is flexible, can generate the SPS file automatically, calculates the coordinate of centimetre-sized precision automatically, having solved no cable seismograph in the unusual mode of cheap and simple does not have a real-time quality control difficult problem, has improved the advantage of seismographic usable range of no cable and operating efficiency greatly.
Description of drawings
Fig. 1 is the circuit theory diagrams that short message control and transmission type of the present invention does not have cable seismograph acquisition station;
Fig. 2 is the circuit theory diagrams that the invention short message control and transmission type does not have collecting unit in the cable seismograph acquisition station.
Embodiment
The method that the present invention utilizes note to carry out seismograph control and data transmission is to introduce mobile phone unit in existing no cable ground instrument acquisition station, utilizes SMS that no cable seismograph acquisition station is carried out State Control and data transmission.By the no cable ground instrument acquisition station that main control unit, collecting unit, storage unit, GPS unit, power supply management control unit and mobile phone unit are formed, also realize cm level location by many GPS station co-located.The steering order that no cable ground instrument acquisition station utilizes SMS to receive from central station realizes the control of duty and duty is turned back to central station, and realizes that image data transmits to central station.
As shown in the figure, not have the cable seismograph be no cable seismograph acquisition station to the short message control and transmission type that is used to implement the inventive method by main control unit 4, collecting unit 3, storage unit 1, GPS unit 2 and power supply management control unit 5 and by note no cable seismograph acquisition station is carried out the mobile phone unit 6 that State Control and data transmit and form.The no cable seismograph acquisition station that just utilizes SMS to control to transmit with data has solved no cable seismograph in the unusual mode of cheap and simple does not have this difficult problem of real-time quality control, make that essential variation has taken place the seismographic characteristic of no cable, improved seismographic usable range of no cable and operating efficiency greatly.
Main control unit can be by compositions such as ARM series CPU (according to the model of different road number employing difference in functionalitys, can use C51CPU when the single track of single station, principle is enough just to reduce power consumption), SDRAM storer, USB interface and Ethernet interfaces.Also provide serial ports to be connected with the GPS unit with mobile phone unit respectively, provide the FIFO memory interface to connect collecting unit, and connect storage unit.It is synchronous that the GPS unit is used for time service, and realize cm level location by many GPS station co-located; Described collecting unit provides the analog detector signal input of 1~8 passage, and program is provided with the preamplification gain of 0dB, 6dB, 12dB, 18dB, 24dB, 30dB or 36dB, and realizes 4,2,1,0.5 or 0.25 sampling rate.The function of power supply management control unit is: the cell voltage of 12V is converted to 5V, and 3.3V, 2.7V, 1.8V etc. supply with main control unit, collecting unit, GPS unit, mobile phone unit and storage unit; At any time close and open the power supply of each unit according to the instruction of main control module; Detect power supply residual capacity and warning in time.Storage unit is selected the SD card of 8G for use.
Described collecting unit is made up of the CS5376A type digital filter 34 and the CS4373A type measuring signal generator 35 of the multi-way switch 31 that can select input test signal or analog detector signal, CS3301A or CS3302A type prime amplifier 32, CS5371A or CS5372A type delta sigma modulator-demodular unit 33, connection main control unit 4; Multi-way switch 31 select input from wave detector 7 or from the signal of measuring signal generator 35, the signal of input sent into prime amplifier 32 amplify, delta sigma modulator-demodular unit 33 will become digital signal through the analog signal conversion that prime amplifier 32 amplifies, the digital signal of 34 pairs of conversions of digital filter is carried out Filtering Processing, and the input of the signal after will handling main control unit 4.Prime amplifier is applicable to when adopting the CS3301A of Cirrus Logic company and is applicable to nautical receiving set when adopting CS3302A by moving-coil geophone, and the preamplification gain of 0dB, 6dB, 12dB, 18dB, 24dB, 30dB or 36dB can program be set.
The delta sigma modulator adopts the CS5371A (single channel) or the CS5372A (binary channels) of Cirrus Logic company, and digital filter is then selected CS5376A for use.CS5371A/CS5372A and CS5376A are that Cirrus Logic company aims at geophysical survey and the AD that designs conversion nest plate, and the two combination can realize 24 analog to digital conversion, and 4,2,1,0.5 or 0.25 sampling rate is provided.2 CS5372A or 4 CS5371A and 1 CS5376 can realize the simulated earthquake signal data acquisition of 4 passages.
Described mobile phone unit uses GSM, CDMA or 3G mobile chip, and is connected with main control unit with serial ports, closes all functions except that SMS, can reduce operating cost and energy consumption; Storage unit adopts the SD card of 8G.The GPS unit can be selected the IT03OEM GPS of Fastrax company receiver module for use, characteristics be size little (22x23x2.7mm), power consumption ultralow (<95mW@2.7V), sensitivity very high (156dBm (tracking)), the output of accurate 1PPS time signal can reach the precision of RMS20nS and cheap.
Mobile phone unit utilizes SMS to receive steering order and realizes the control of duty and duty is turned back to central station, and realizes the transmission of image data, thereby realizes that the steering order that receives command function and return the work state information function has:
1) is used to open acquisition station, enters recording status, return the start-up command of open state;
2) be used to make acquisition station to enter dormant state, wait for the dormancy instruction of start-up command;
3) be used to make acquisition station to enter off-mode, behind certain hour, enter the shutdown command of dormant state automatically;
4) acquisition parameter that is used for acquisition station is provided with acquisition parameter is provided with instruction;
5) the regularly synchronous acquisition instruction of data that is used to notify acquisition station and blaster to enter regularly the synchronous acquisition state;
6) be used for acquisition station and detect power supply status, and the power state indication of return results;
7) be used for acquisition station detection of stored device state, and the instruction of the memory state of return results;
8) be used for acquisition station synchronous acquisition gps coordinate, and return the GPS acquisition instructions of coordinate;
9) be used for acquisition station and finish the collecting unit detection, the collecting unit of return results detects instruction;
10) data movement instruction that is used to that data layout is set and transmits data.
Described data movement instruction:
Parameter is arranged: F (sign), Data_Format_F (data layout sign), Trace_No1 (initial Taoist monastic name), Trace_No2 (end of a period Taoist monastic name), dNo (Taoist monastic name at interval), T1 (zero-time), T2 (finish-time), dT (sampling interval).
F (sign) is the data movement instruction identification code, (uses F by 2
1F
2Expression) form:
F
1=0 expression transmits the data of having gathered;
F
1=1 expression is provided with acquisition station, transmits the data that are about to collection;
F
2=0 expression transmits the data of whole trace record, and this moment, T1 and T2 can not fill out;
F
2=1 expression transmits the data from T1 to T2 in the record data;
F
2=2 expressions transmit the primary wave partial data in the record data, and this moment, T1 and T2 can not fill out.
F
2=9 expressions do not need that data are sent to central station and carry out quality monitoring, at this moment carry out quality control as long as transmit the energy value of per pass record, use this instruction, every note can transmit the energy value of 40 big guns record, can use this instruction when ordinary production and when very well.
The data layout identification code of Data_Format_F (data layout sign) for transmitting:
Data_Format_F=0 represents symbolization position transmission data, and this moment, a note can transmit 1280 data at most.
Data_Format_F=1 represents to adopt 1 byte to transmit data, and this moment, a note can transmit 160 data at most.
Data_Format_F=2 represents to adopt 2 bytes to transmit data, and this moment, a note can transmit 80 data at most.
Data_Format_F=3 represents to adopt 3 bytes to transmit data, and this moment, a note can transmit 53 data at most.
Data_Format_F=4 represents to adopt 4 bytes to transmit data, and this moment, a note can transmit 40 data at most.
Trace_No1 and Trace_No2 represent that respectively needs transmit the home record Taoist monastic name and the end of a period Taoist monastic name of data, and dNo represents that Taoist monastic name at interval.
T1, T2 are zero-time and the finish-times of representing respectively with number of samples, transmit data since T1 sampling point, and till T2 sampling point, dT represents to resample at interval.
The present invention does not have cable seismograph construction process (exciting seismic prospecting with explosive is example):
After a certain block of decision need carry out seismic prospecting, old process was: 1. carry out the recording geometry design earlier according to geologic requirements; 2. test exciting, determine preferred plan with receiving factor; 3. carry out surveying work, all wave detectors and sp location are carried out mark with timber and penoncel; 4. lay collecting device; 5. blow out and excite image data; 6. data processing and analysis.Construction process is as follows:
(1) carry out the recording geometry design earlier according to geologic requirements: because no cable earthquake-capturing station does not have heavy cable, overall weight alleviates greatly, and does not have the restriction of cable length, makes that the design of seismic prospecting recording geometry is more flexible.
(2) test exciting, determine preferred plan: in practice of construction, need excite dozens or even hundreds of big gun to determine to excite dose, excitation well depth equal excitation factor and receiving factors such as seismometer pattern layout and embedding mode with receiving factor.Characteristics are to excite the interval bigger at every turn, have the abundant time to carry out data aggregation.At this moment can send to central station to all or part image data on demand with note, be convenient to carry out the real time data analysis.
(3) surveying work: with seismic exploration difference routinely be to need not all wave detectors and sp location are made marks with timber and penoncel, only need make marks to the reference mark, most of point can position by common GPS, or utilize the reference mark to estimate positioning instant can, precise coordinates can be determined by the GPS in the acquisition station, this will reduce the measurement cost greatly, reduce workload, increase work efficiency.
(4) lay collecting device: because no cable earthquake-capturing station does not have the restriction of heavy cable, the laying of acquisition station is just very simple.Lay the back and press the starting switch opening power; Acquisition station carries out self check and GPS location; Send self-detection result and coordinate information (reporting for work) to central station to central station; Central station is sent out shutdown command makes acquisition station enter off-mode, and the shutdown concluding time is set in the time that all acquisition stations have been laid in expectation; All acquisition stations enter dormant state simultaneously in the time of setting, and wait for start-up command.
(5) blow out and excite image data: finish back (explosive excites and waits other preliminary works all ready certainly) in case all acquisition stations are laid, transmission data movement instruction earlier, setting data load mode; Send then data regularly the synchronous acquisition instruction carry out timing and start and blow out, press record data lock in time, improve operating efficiency greatly.
(6) data collection: after storer is full of data, need be put into central station to acquisition station and carry out the data recovery, can adopt USB interface or network interface to be connected and finish the data recovery, carry out the data layout then with the central station server, calculate GPS network system high-precision coordinate, generate the SPS file.
(7) data processing and analysis: adopt data processing and the analytical approach the same with conventional processing.
In a word, apparatus of the present invention can be used for artificial and earthquake signals collecting, are made up of six big units.Be main control unit, collecting unit, mobile phone unit, GPS unit, power supply management control unit and storage unit.With the seismographic difference of domestic and international no cable be to have introduced mobile phone unit, solve no cable seismograph in the unusual mode of cheap and simple and do not had this difficult problem of real-time quality control, make that essential variation has taken place no cable seismograph, improved seismographic usable range of no cable and operating efficiency greatly.Utilize SMS that no cable seismograph (memory-type does not have the cable acquisition station) is controlled and data transmission, utilize many GPS station co-located technology to realize the centimetre-sized location, having solved conventional memory-type does not have the problem that the cable seismograph exists: 1. acquisition station can not receive the control that steering order realizes duty; 2. acquisition station can not send data to the real-time quality control that central station is realized data; 3. it is synchronous that the GPS of acquisition station only is used for time service, and most of conventional memory-type does not have that cable earthquake-capturing station does not position or bearing accuracy is not enough.