CN105911597A - Distributed type electromagnetic transmitter system and control method therefor - Google Patents
Distributed type electromagnetic transmitter system and control method therefor Download PDFInfo
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- CN105911597A CN105911597A CN201610218445.6A CN201610218445A CN105911597A CN 105911597 A CN105911597 A CN 105911597A CN 201610218445 A CN201610218445 A CN 201610218445A CN 105911597 A CN105911597 A CN 105911597A
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/083—Controlled source electromagnetic [CSEM] surveying
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2173—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a biphase or polyphase circuit arrangement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/083—Controlled source electromagnetic [CSEM] surveying
- G01V2003/084—Sources
Abstract
The invention discloses a distributed type electromagnetic transmitter system and a control method therefor. The system comprises a multi-power-source module, a multi-emission module and an optional control module, wherein a plurality of AC/DC converters are connected in parallel via the multi-power-source module, and therefore multiple 380V alternating current to direct current conversions can be realized; the multi-power-source module is enabled to have a voltage adjusting function; the multi-emission module is used for selectively transmitting a plurality of direct current voltage signals obtained via converting operation to a plurality of emission sub-module, and a distribution type emission function can be fulfilled; main control logic of the control module is realized via an FPGA, and data communication between a transmitter and computer software can be realized via an MCU. Transmitter power capacity can be flexibly configured via the system and the method, and high frequency emission current peak value can be effectively improved.
Description
Technical field
The present invention relates to a kind of distributed electromagnetic transmitter system and control method, further relate to utilize
This system and method carries out the application of electromagnetic prospecting.
Background technology
The laying of the emission source of artificial source's electromagnetic method, will be according to task in region to be detected, one
Two ground electrodes are laid in fixed position, and the distance between the two ground electrode is generally 1Km-3Km,
Two electrodes are connected on transmitter by leading knot, and transmitter is connected by wire with electromotor.
CN103308950A discloses a kind of multifunctional electromagnetic transmitter, including system control unit,
Waveform composition and protected location, power driving circuit, H-bridge circuit, transmitter unit, display unit, with
Step module and memory element, system control unit contains microcontroller, Waveform composition and protected location and contains
Field programmable gate array (FPGA), four power MOSFET tube composition H bridge radiating circuits, A/D
Collecting unit is made up of Hall voltage sensor and microcontroller A/D, and display unit is touched by resistance-type
Touch screen composition.Present invention microcontroller and FPGA achieve the generation of multiple waveforms, and Wave data exists
SD card can arbitrarily be revised and add, in current value data are stored in USB flash disk and show on the touchscreen in real time
Show.
CN202798170U discloses a kind of transient electromagnetic emitter and uses this transient electromagnetic to launch dress
The transient electromagnetic emission system put, this transient electromagnetic emitter includes full bridge switching circuit and light-coupled isolation
Output circuit, described full bridge switching circuit includes clock signal input and load incoming end, described light
Coupling spacing output circuit includes controlled signal input and clock signal outfan, and described clock signal exports
End is connected with clock signal input.
CN202631750U discloses a kind of transient electromagnetic emitter for geological prospecting, including sending out
Penetrate antenna and for forming the switch of brachium pontis, it is characterised in that described transmitting antenna is launched sky by small inductor amount
Line becomes with big inductance quantity transmission antenna group, and described switch has three groups, and one of which is common set, opens for three groups
Close and separately constitute full-bridge radiating circuit with small inductor amount transmitting antenna and big inductance quantity transmitting antenna.
CN204906195U discloses a kind of electromagnetics transmitter, and described electromagnetics transmitter includes: electromotor
Group, three-phase commutation bridge, filter capacitor, one-level inverter bridge, resonant inductance, every value electric capacity, high frequency transformation
Device, high-frequency rectification bridge, LC filter circuit and two grades of inverter bridge；Wherein, described generating set is with described
Three-phase commutation bridge connects, for output AC electricity to described three-phase commutation bridge；Described three-phase commutation bridge defeated
Go out end to be connected with described filter capacitor, for unidirectional current output will be formed after the three-phase alternating current electric rectification of input
To described filter capacitor, the outfan of described filter capacitor is connected with described one-level inverter bridge, for connecing
The unidirectional current received be filtered after output to described one-level inverter bridge, the outfan of described one-level inverter bridge with
The former limit of described high frequency transformer connects, and produces exchange for the filtered DC inverter that will receive
Square wave also exports the former limit arriving described high frequency transformer；The secondary of described high frequency transformer is whole with described high frequency
Stream bridging connects, and after the ac square wave boosting that will receive, output is to described high-frequency rectification bridge, described high frequency
The outfan of rectifier bridge is connected with described LC filter circuit, for by whole for the ac square wave after described boosting
Stream forms direct current square wave, and described LC filter circuit is connected with described two grades of inverter bridge, for by reception
The filtering of direct current square wave forms unidirectional current, and described two grades of inverter bridge produce after the unidirectional current of reception carries out inversion
Different square waves also exports output port；Described resonant inductance with described every value capacitances in series described one
On circuit between level inverter bridge and the former limit of described high frequency transformer, each merit of described one-level inverter bridge
Being parallel with filter capacitor on rate device, described filter capacitor, resonant inductance return with every value electric capacity formation resonance
Road, is used for controlling described one-level inverter bridge；Described electromagnetics transmitter also includes and described one-level inverter bridge
The auxiliary current source network that lagging leg is in parallel, is opening for regulating the lagging leg of described one-level inverter bridge
Lead to and the voltage in turn off process.
CN1445915A discloses a kind of Sofe Switch isolated converter for EMUs, is used for isolating change
The rectified device of secondary of the switch transformer of pressure is directly connected on output filter capacitor, at conventional high frequency
In the topological structure of switch converters, switch by the controllable constant-current source rate of doing work, by such circuit structure
Simplification, it is provided that a kind of do not have input, output choke induction Sofe Switch isolated converter, starting
Input voltage source etc. is not produced dash current when Cheng Zhong, steady operation and when load short circuits protects, and
And the power tube in output rectifier part, controllable constant-current source is all Sofe Switch, thus reduce switching loss and
Electromagnetic interference.
" air wave drawing method research in the controllable source electromagnetic survey of ocean ", Wang Xuan etc., Geophysics In China,
2013, disclose air wave in the exploration of positive ocean controllable source electromagnetism (MCSEM) and sea-floor electromagnetic is responded
Impact, when shallow water area is explored, it with from subsea strata useful signal interact, can flood
From the useful signal on stratum, hinder the application of shallow water area MCSEM exploration.This paper is based on air
Or unlimited water layer model, utilize the air wave that water and air layer interface produce at seabed and Hai Shui-Kong Qijie
Decay reverberation letter is formed between face.
During the work of artificial source's electromagnetic method, it is provided with the electromagnetic signal of certain frequency to wire first with transmitter,
This information sends the electromagnetic field of change by ground electrode to underground, and electromagnetic field is to the mistake of underground propagation
Cheng Zhong, can inspire faradic current in subsurface anomaly body, by the receiver of surface deployment, receives not
The current potential formed with frequency of supply, by analyzing this electric potential signal, reaches Underground different depth mesh
The purpose of standard type (can for example, see Fig. 1).
As it is shown in figure 1, emission mode is centralized transmitting, i.e. in artificial field source magnetotelluric method is explored,
Electromagnetics transmitter injects alternating current according to certain emitter stage away to the earth, and receiver is by obtaining the earth
The response of medium pair, builds the distributed intelligence of underground medium electrical conductivity.Owing to being connected with electromagnetics transmitter
Two ground electrodes connect, apart from generally large, need longer transfer wire to connect transmitter and ground connection,
So could form complete loop, it is achieved the function that electromagnetic signal effectively transmits.
Seeing Fig. 2, this figure is centralized artificial source's electromagnetics transmitter topological diagram.380V is confessed by generating set
Alternating current, alternating current is whole through soft start, uncontrollable rectifier bridge, inverter bridge H1, high frequency transformer, high frequency
Eight circuit modules such as stream bridge, LC filtering, inversion output, are transformed to Rectified alternating current；Wherein, no
Control rectifier bridge is made up of four unilateral diodes；Inverter bridge H1 is made up of 4 powerful transistors,
Controlling circuit by 4 drive waveforms, will arrange filtered DC inversion is that high frequency (20KHz) is handed over
Stream electricity；Be high-frequency and high-voltage alternating current through high frequency transformer by voltage lifting again, by high-frequency rectification bridge,
LC filter is changed into accurate steady direct current；It is high frequency square wave finally by inversion output part inversion
Signal, is injected into emission electrode A and emission electrode B via transmission line, and by emission electrode A and transmitting
Electrode B feeds in the earth.
But, from the principles of electric and electronic engineering, transmission line exists parasitic capacitance, stray inductance, dead resistance
Deng parasitic parameter, transmission line is the longest, and the impact of this parasitic parameter is the biggest, and dead resistance can subtract accordingly
The current value of few output.Stray inductance increases the rise time of emission current, makes output current phase delayed
In output voltage.When two electrodes lay respectively at the both sides of transmitter, and transmission line is drawn towards phase negative side completely
To, so the parasitic capacitance on transmission line can have the counteracting of certain procedures, but if transmitter does not exists
The middle of two ground electrodes, the length of transmission line at transmitter two ends is different, and parasitic capacitance has
Impact.Two-way exchange causes exporting current peak reduction, and the effective power of emission system output is got over therewith
Little.
Especially, the stray inductance on transmission line is quite big on whole system impact, is embodied in:
1) rise time of electric current can be increased, make transmitted waveform distort；
2) when launching high frequency electric, due to the existence of stray inductance so that overall emission machine load impedance
Becoming big, emission current peak value reduces, and investigation depth is produced impact.
In summary, due to the impact of the inductive part on line or in load, equiva lent impedance can be made to increase,
Current effective value reduces, and finally makes the power reduction that transmitter is launched.This area needs one to have
Effect overcomes electromagnetics transmitter system and the control method of described defect.
Summary of the invention
The present invention is directed to the drawbacks described above of prior art, from the high-power transmitting how improving electromagnetics transmitter
Ability, the angle of increase high frequent current peaks are set out, and propose a kind of new distribution type electromagnetics transmitter system
And control method.This Electro-magnetic Launcher System can be effectively improved high frequency with flexible configuration transmitter power capacity
The peak value of emission current.
Based on above-mentioned, the invention provides techniques below scheme.
In one aspect of the invention, it is provided that a kind of distributed electromagnetic transmitter system, this system includes:
Multi-power module, multi-emitting module, and optional control module；
Described multi-power module is by parallel by multiple AC/DC changers, it is achieved 380V AC-to DC
Multiple (such as 500V---1000V) conversion so that this module has the function of voltage-regulation；
Multi-emitting module, by many sub-transmitter modules, the multiple d. c. voltage signals that will convert, has
Selectively it is sent to many sub-transmitter modules, it is achieved distribution formula emission function；
Described control module is realized main control logic by FPGA, MCU realize transmitter and meter
The data communication of calculation machine software.Wherein FPGA (Field-Programmable Gate Array) is i.e. on-the-spot
Programmable gate array.MCU (Microcontroller Unit) i.e. micro-control unit.
Preferably, in described multi-power module, common power generation unit send the friendship of 380V
Stream electricity, and alternating current is sent to the outfan of power generation unit；Outfan is in parallel many groups high-power
AC/DC power supply change-over device, is converted into a DC voltage by 380V alternating voltage；It is optionally possible to
Multiple DC voltages are sent transmitter module selectively.
Preferably, in described multi-emitting module, design multiple different sub-transmitter module, according to reality
Job demand, is connected from different ground electrodes；By computer software control, different sons is selected to send out
Penetrate module to be connected from different ground electrodes；Realize different launch position and emitter stage away from the case of good
Launch.
It is highly preferred that in described multi-power module, common power generation unit send 380V's
Alternating current, and alternating current is sent to the outfan of power generation unit；Many groups of big merits that outfan is in parallel
Rate AC/DC power supply change-over device, it is possible to 380V alternating voltage is converted into a DC voltage；Many groups
AC/DC power module output-parallel, to dc bus, can configure each AC/DC by upper computer software
The output grade of power module, multiple AC/DC parallel connection can be effectively improved the output work of emission system
Rate；Dc bus connects multiple transmitter modules, and each transmitter module is arranged close to the position of ground electrode,
The corresponding ground connection emission electrode of each transmitter module；Select to enable concrete transmitting by upper computer software
Module, it is possible to multiple DC voltages are sent to transmitter module selectively.A preferred implementation
In, power module to the wire topologies of main correspondence be: power supply AC 380V is power frequency electric power generating
Unit, the output of threephase generator is connected to the uncontrollable rectifier device outlet side of AC/DC module, uncontrollable rectifier
Bridge is made up of diode D1-D6, and the output of uncontrollable rectifier device connects big capacity electrolyte capacitor wave filter C1,
And be connected to transistor S1-S4 constitute high-frequency inversion bridge, high-frequency inversion bridge export one end be connected to every
One end of straight capacitor C2, the other end of C2 is connected to high frequency change with another outfan of high-frequency inversion bridge
Depressor, high frequency transformer outlet side is made up of two groups of vice-side winding, series connection output after rectifying and wave-filtering respectively；
AC/DC power inverter realizes the conversion of AC-to DC, and have voltage-regulation, front stage isolation,
The functions such as output overvoltage overcurrent protection, soft start.
In described diode D1-D6 and transistor S1-S4, Embedding Material is organosilicon material.Enter one
Step ground, described organosilicon material is the organosilicon material being prepared via a method which, the method includes:
(1) 100 parts of vinyl silicone oils and 0.02～1 part of Pt catalyst are added double-planet power mixer
In, under conditions of rotational velocity 200～1000r/min, revolution speed 10～20r/min stir 0.5～
1h prepares component A；
(2) by 80～90 parts of vinyl silicone oils, 5～25 parts of commercially available polysiloxane chain extender, 0.5～5
Part commercial silanes cross-linking agent and 0.1～1 part of maleat base ester inhibitor add double-planet power mixer
In, under the conditions of rotational velocity 200～1000r/min, revolution speed 10～20r/min, stir 0.5～1h
Prepare component B；
(3) by A, B 1: 3～3: 1 mix homogeneously final vacuum deaeration in molar ratio, then at freeze-day with constant temperature
Case solidifies and i.e. obtains organosilicon material.
As is generally understood, described number is in parts by weight.
Preferably, described vinyl silicone oil is the silicone oil shown in following formula (1) or (2) or a combination thereof thing:
ViMe2SiO(Me2SiO)nSiMe2Vi (formula 1)
Me3SiO(Me2SiO)n(MeViSiO)mSiMe3(formula 2)
Wherein, n is equal to 15-40, preferably 20-30；Me is methyl, and Vi is vinyl；Be preferably its two
The compositions of person, the ratio of the two is preferably 1: 10～1: 5 (weight).
When using this organosilicon material embedding, through vibration, high/low temperature storage, mechanical shock, Steadydamp-heat
And the test such as temperature cycles, fully meet every factor evaluation test of encapsulation producer.
Further, the major function of FPGA includes resolve command information, reads gps time, calculates
Launch frequency, produce IGBT synchronized signal, gather voltage, current information；MCU major function
Including preservation and the reading of configuration information, and computer software communication, with FPGA module communication.
Preferably, the start/stop time of tranmitting frequency information and transmitting is previously written in tf card, MCU when powering on
From tf card, frequency and temporal information is imported by SDIO interface；MCU passes through SPI interface and FPGA
Module communicates, and frequency information and information launch time is written in FPGA in the depositor of correspondence, and
The information such as busbar voltage, emission current and gps time are read from FPAG；MCU passes through UART
Interface and computer software communication, receive the control command that computer software sends, by emission state, electricity
The information such as pressure, electric current, gps time are sent to computer software.
In another aspect of this invention, additionally providing the method controlling said system, the method includes: by
Common power generation unit sends the alternating current of 380V, and alternating current is sent to power generation unit
Outfan；High-power AC/DC power supply change-over device is organized in outfan parallel connection more, by 380V alternating voltage
It is converted into a DC voltage；Optionally, multiple DC voltages are sent transmitter module selectively；Design
Multiple different sub-transmitter modules, according to real work needs, can be connected from different ground electrodes；
By computer software control, different sub-transmitter modules is selected to be connected from different ground electrodes, it is achieved
Different launch position and emitter stage away from the case of good transmitting；In transmitter overall control architecture, by
FPGA realizes main control logic, MCU realize the data communication of transmitter and computer software；
The major function of FPGA includes resolve command information, reads gps time, calculates and launches frequency, produces
IGBT synchronized signal, gathers voltage, current information.
In still another aspect of the invention, it is provided that said system or method are surveyed at artificial field source magnetotelluric method
Application in spy, for building the distributed intelligence of underground medium electrical conductivity.
Preferably, it is by improving the high power transmitter energy power of electromagnetics transmitter, increasing high frequent current peaks,
Realize effective transmission of electromagnetic signal, thus build the distributed intelligence of underground medium electrical conductivity.
Specifically, the system of the present invention may include that
1) multi-power module: in parallel by multiple AC/DC changers, it is achieved 380V AC-to DC
Multiple (500V---1000V) conversion, this module has the function of voltage-regulation.Specifically:
Sent the alternating current of 380V by common power generation unit, and alternating current is sent to electric power sends out
The outfan of group of motors；Outfan is in parallel many groups of high-power AC/DC power supply change-over devices, can be
380V alternating voltage is converted into a DC voltage；Multiple DC voltages can be sent transmitting mould selectively
Block.
2) multi-emitting module: by many sub-transmitter modules, the multiple d. c. voltage signals converted,
It is sent to many sub-transmitter modules selectively, it is achieved distribution formula emission function.Specifically: devise many
Individual different sub-transmitter module, according to real work needs, can be connected from different ground electrodes；Logical
Cross computer software control, select different sub-transmitter modules to be connected from different ground electrodes；Realize not
With launch position and emitter stage away from the case of good transmitting.
More specifically, for multi-power module: as it is shown on figure 3, by multiple AC/DC convertor
(AC/DC) in parallel, it is achieved multiple (500V---1000V) conversion of 380V AC-to DC, this mould
Block has the function of voltage-regulation.Specifically: sent the exchange of 380V by common power generation unit
Electricity, and alternating current is sent to the outfan of power generation unit；Outfan is in parallel many groups high-power
AC/DC power supply change-over device, can be converted into a DC voltage 380V alternating voltage；Organize AC/DC more
Power module output-parallel, to dc bus, can configure each AC/DC power supply mould by soft the opening of host computer
The output grade of block, multiple AC/DC parallel connection can be effectively improved the output of emission system.Direct current
Bus connects multiple transmitter modules, and each transmitter module is arranged close to the position of ground electrode, Mei Gefa
Penetrate the corresponding ground connection emission electrode of module.Select to enable concrete transmitter module by upper computer software,
Multiple DC voltages can be sent to transmitter module selectively.
For the power module in Fig. 3 to the concrete line topological figure of main correspondence as shown in Figure 4: power supply
AC 380V is power frequency electric power generating set, and the output of threephase generator is connected to not controlling of AC/DC module
Commutator outlet side, as shown in Figure 4, uncontrollable rectifier bridge is made up of diode D1-D6, uncontrollable rectifier device
Output connect big capacity electrolyte capacitor wave filter C1, and be connected to transistor S1-S4 constitute high frequency
Inverter bridge, high-frequency inversion bridge exports one end and is connected to one end of block capacitor C2, the other end of C2 with
Another outfan of high-frequency inversion bridge is connected to high frequency transformer, and high frequency transformer outlet side is by two groups of secondary
Winding is constituted, series connection output after rectifying and wave-filtering respectively.AC/DC power inverter realizes AC-to DC
Conversion, and there is the functions such as voltage-regulation, front stage isolation, output overvoltage overcurrent protection, soft start.
Specifically, for multi-emitting module: as it is shown on figure 3, select son to launch mould by upper computer software
Block 1 and sub-transmitter module 2 enable, and other modules are closed, and now corresponding transmitting position is spontaneous emission mould
Ground electrode at block 1 and the ground electrode at sub-transmitter module 2, emitter stage is away from for above-mentioned two ground connection
Distance between electrode.It is similar to, can select to enable other modules by upper computer software and launch
Flexible away from switching emission electrode to constitute different transmitting positions and emitter stage.Also only two can be installed
Transmitter module.
For the transmitter module in Fig. 3 to the concrete line topological figure of main correspondence as shown in Figure 5.
In transmitter module, can be by many sub-transmitter modules, the multiple DC voltages letter converted
Number, it is sent to many sub-transmitter modules selectively, it is achieved distribution formula emission function.Specifically: design
Multiple different sub-transmitter modules, each transmitting submodule comprises the transmitting half being made up of two transistors
Bridge, the continuous current circuit being made up of a transistor, the single-phase conducting filter being made up of diode and thin-film capacitor
Wave circuit.According to real work needs, can be connected from different ground electrodes；Pass through computer software
Control, select different sub-transmitter modules to be connected from different ground electrodes；Realize different transmitting positions
With emitter stage away from the case of good transmitting.
Transmitter module is positioned close to the position of emission electrode.Each module comprises a set of logic control and inspection
Slowdown monitoring circuit, by GPS time service circuit, waveform control circuit, drive circuit, voltage detecting circuit, electric current
Testing circuit, signal conditioning circuit are constituted.
In control structure module, transmitter overall control architecture block diagram is as shown in Figure 6, real by FPGA
Main control logic, is realized the data communication of transmitter and computer software by MCU.FPGA's
Major function includes resolve command information, reads gps time, calculates and launches frequency, produces IGBT same
Step drives signal, gathers voltage, current information.
MCU major function includes preservation and the reading of configuration information, and computer software communication, with FPGA
Module communicates.The start/stop time of tranmitting frequency information and transmitting is previously written in tf card, MCU when powering on
From tf card, frequency and temporal information is imported by SDIO interface.MCU passes through SPI interface and FPGA
Module communicates, and frequency information and information launch time is written in FPGA in the depositor of correspondence, and
The information such as busbar voltage, emission current and gps time are read from FPAG.MCU passes through UART
Interface and computer software communication, receive the control command that computer software sends, by emission state, electricity
The information such as pressure, electric current, gps time are sent to computer software.
By logic control and testing circuit structure chart:
Emitting voltage is made up of signals collecting and digital-to-analogue conversion two parts with emission current testing circuit, voltage
Signal detection uses isolated amplifier AD202 as detecting element.AD202 passes through internal transformer coupling
Closing, input and output to isolated amplifier carry out electrical isolation.DC voltage conversion circuit energy in sheet
For input stage, external sensor and signal processing circuit offer ± 7.5V, the insulating power supply of 2mA.Electric current
Signals collecting uses isolated amplifier HCPL-7840 as current measuring element.It is mainly used in current detecting
Isolation with analogue signal.Digital-to-analogue conversion selects the AD7606 multipath high-speed AD with SPI interface to turn
Parallel operation, can change emitting voltage and current signal simultaneously.Transformation result is passed by SPI interface
It is passed in FPGA, is transferred to computer control software via MCU and shows.
Accompanying drawing explanation
Fig. 1 is artificial source's electromagnetic method discharger schematic diagram；
Fig. 2 is that centralized artificial source's electromagnetic method launches operation principle；
Fig. 3 is the topological structure schematic diagram of the system according to the present invention；
Fig. 4 is the multi-power module schematic diagram according to the present invention；
Fig. 5 is the multi-emitting interface module schematic diagram according to the present invention；
Fig. 6 is the transmitter control structure block diagram according to the present invention；
Fig. 7-1 ground electrode launches drive waveforms figure (electrode A)；
Fig. 7-2 ground electrode launches drive waveforms figure (electrode B)；
Fig. 8 (a) is transmitted waveform under regular situation (40V powers)；
Fig. 8 (b) is transmitted waveform under regular situation (80V powers)；
Fig. 9 (a) is the transmitted waveform (40V powers) according to the present invention；
Fig. 9 (b) is the transmitted waveform (80V powers) according to the present invention.
Specific embodiments
Below in conjunction with following example, the present invention is described in further detail, but the embodiment party of the present invention
Formula is not limited to this.
Embodiment 1
Use the said system of the present invention, on computer control software, select two to launch submodule,
By concrete emission detection task, system of selection determines that computer control software transmitting control commands is opened
And two submodules of selection of configuration, one of them module is configured to electrode A, another module configures
For electrode B, launch submodule and select corresponding driving ripple according to the control command received with configuration information
Shape (as shown in Fig. 7-1 and 7-2).Wherein IGBT module S1 in S1 drive waveforms corresponding diagram 5, S2
IGBT module S2 in drive waveforms corresponding diagram 5, IGBT module S3 in S3 drive waveforms corresponding diagram 5.
Transmitted waveform contrasts:
Fig. 8 (a), (b) and Fig. 9 (a), (b) be centralized transmitter respectively with according to embodiment 1
Distributed frame transmitter transmitted waveform comparison diagram in laboratory conditions, is respectively adopted 40V and 80V
The output voltage collected during power supply and current waveform figure, wherein Fig. 8 (a), (b) are centralized transmitters
Transmitted waveform figure, Fig. 9 (a), (b) are distributed frame transmitted waveform figures.Table 1 is two kinds of emitting structurals
The peak point current data exported under the test conditions above.
1 two kinds of structure emission current peak value contrasts of table
| Supply voltage (V) | Concentrating structure peak point current (A) | Distributed frame peak point current (A) |
| 40 | 5.8 | 8.8 |
| 80 | 10.8 | 16.4 |
By table 1 clearly it can be seen that use the distributed electromagnetic transmitter system of the present invention, have bright
Aobvious higher emission current peak value.
This written description uses the open present invention of example, including optimal mode, and also makes art technology
Personnel can manufacture and use the present invention.The present invention can patentable scope be defined by the claims,
And other example that those skilled in the art expect can be included.If other example this has do not differ from
The structural element of the literal language of claims, if or other example this include and claim
The literal language of book is without the equivalent structure element of substantial differences, and other example the most this is intended to be in right
Within the scope of claim.Under not resulting in inconsistent degree, by with reference to by herein with reference to
It is incorporated herein in place of all references.
Claims (10)
1. a distributed electromagnetic transmitter system, this system includes: multi-power module, multi-emitting module, and optional control module；
Described multi-power module is by parallel by multiple AC/DC changers, it is achieved multiple (such as 500V---1000V) conversion of 380V AC-to DC so that this module has the function of voltage-regulation；
Multi-emitting module, by many sub-transmitter modules, the multiple d. c. voltage signals that will convert, is sent to many sub-transmitter modules selectively, it is achieved distribution formula emission function；
Described control module is realized main control logic by FPGA, MCU realize the data communication of transmitter and computer software.
System the most according to claim 1, wherein in described multi-power module, is sent the alternating current of 380V, and alternating current is sent to the outfan of power generation unit by common power generation unit；Outfan is in parallel many groups of high-power AC/DC power supply change-over devices, are converted into a DC voltage by 380V alternating voltage；It is optionally possible to multiple DC voltages are sent transmitter module selectively.
System the most according to claim 1 and 2, wherein in described multi-emitting module, devises multiple different sub-transmitter module, according to real work needs, is connected from different ground electrodes；By computer software control, different sub-transmitter modules is selected to be connected from different ground electrodes；Realize different launch position and emitter stage away from the case of good transmitting.
4. according to the system described in aforementioned claim 2, wherein in described multi-power module, common power generation unit send the alternating current of 380V, and alternating current is sent to the outfan of power generation unit；Outfan is in parallel many groups of high-power AC/DC power supply change-over devices, it is possible to 380V alternating voltage is converted into a DC voltage；Many group AC/DC power module output-parallels to dc bus, can configure the output grade of each AC/DC power module by soft the opening of host computer, multiple AC/DC output that can be effectively improved emission system in parallel；Dc bus connects multiple transmitter modules, and each transmitter module is arranged close to the position of ground electrode, the corresponding ground connection emission electrode of each transmitter module；Select to enable concrete transmitter module by upper computer software, it is possible to multiple DC voltages are sent to transmitter module selectively.
System the most according to claim 4, wherein power module to the wire topologies of main correspondence be: power supply AC 380V is power frequency electric power generating set, the output of threephase generator is connected to the uncontrollable rectifier device outlet side of AC/DC module, uncontrollable rectifier bridge is made up of diode D1-D6, the output of uncontrollable rectifier device connects big capacity electrolyte capacitor wave filter C1, and it is connected to the high-frequency inversion bridge that transistor S1-S4 is constituted, high-frequency inversion bridge exports one end and is connected to one end of block capacitor C2, the other end of C2 is connected to high frequency transformer with another outfan of high-frequency inversion bridge, high frequency transformer outlet side is made up of two groups of vice-side winding, series connection output after rectifying and wave-filtering respectively；AC/DC power inverter realizes the conversion of AC-to DC, and has the functions such as voltage-regulation, front stage isolation, output overvoltage overcurrent protection, soft start.
6. according to system in any one of the preceding claims wherein, wherein the major function of FPGA includes resolve command information, reads gps time, calculates and launches frequency, produces IGBT synchronized signal, gathers voltage, current information；MCU major function includes preservation and the reading of configuration information, and computer software communication, with FPGA module communication.
System the most according to claim 6, the start/stop time of tranmitting frequency information and transmitting is previously written in tf card, and when powering on, MCU imports frequency and temporal information by SDIO interface from tf card；Frequency information and information launch time, by SPI interface and FPGA module communication, are written in FPGA in the depositor of correspondence by MCU, and read the information such as busbar voltage, emission current and gps time from FPAG；MCU, by UART interface and computer software communication, receives the control command that computer software sends, the information such as emission state, voltage, electric current, gps time is sent to computer software.
8. the method controlling system according to any one of claim 1-7, the method includes:
Sent the alternating current of 380V by common power generation unit, and alternating current is sent to the outfan of power generation unit；High-power AC/DC power supply change-over device is organized in outfan parallel connection more, and 380V alternating voltage is converted into a DC voltage；Optionally, multiple DC voltages are sent transmitter module selectively；
Design multiple different sub-transmitter module, according to real work needs, can be connected from different ground electrodes；By computer software control, select different sub-transmitter modules and different ground electrodes to be connected, it is achieved different launch position and emitter stage away from the case of good transmitting；
In transmitter overall control architecture, FPGA realize main control logic, MCU realize the data communication of transmitter and computer software；The major function of FPGA includes resolve command information, reads gps time, calculates and launches frequency, produces IGBT synchronized signal, gathers voltage, current information.
9. the method for system described in any one of claim 1-7 or claim 8 application in artificial field source magnetotelluric method is explored, for building the distributed intelligence of underground medium electrical conductivity.
Application the most according to claim 9, it, by improving the high power transmitter energy power of electromagnetics transmitter, increasing high frequent current peaks, realizes effective transmission of electromagnetic signal, thus builds the distributed intelligence of underground medium electrical conductivity.
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