CN105911597B - 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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- CN105911597B CN105911597B CN201610218445.6A CN201610218445A CN105911597B CN 105911597 B CN105911597 B CN 105911597B CN 201610218445 A CN201610218445 A CN 201610218445A CN 105911597 B CN105911597 B CN 105911597B
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- 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
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- 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
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- Electromagnetism (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Power Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Inverter Devices (AREA)
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, in certain position
Laying two ground electrodes, the distance between the two ground electrode is generally 1Km-3Km, and two electrodes are connected to by leading knot
On transmitter, 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, synchronization module and memory element, system controls single
Unit is containing microcontroller, and Waveform composition and protected location contain field programmable gate array (FPGA), four power MOSFET tubes
Composition H bridge radiating circuit, A/D collecting unit is made up of Hall voltage sensor and microcontroller A/D, and display unit is by electricity
Resistive touch screen forms.Present invention microcontroller and FPGA achieve the generation of multiple waveforms, and Wave data can in SD card
Arbitrarily amendment and interpolation, in current value data are stored in USB flash disk and show in real time on the touchscreen.
CN202798170U discloses a kind of transient electromagnetic emitter and uses the transition of this transient electromagnetic emitter
Electro-magnetic Launcher System, this transient electromagnetic emitter includes full bridge switching circuit and light-coupled isolation output circuit, and described full-bridge is opened
Closing circuit and include clock signal input and load incoming end, described light-coupled isolation output circuit includes controlled signal input
With clock signal outfan, described clock signal outfan is connected with clock signal input.
CN202631750U discloses a kind of transient electromagnetic emitter for geological prospecting, including launching antenna and use
Switch in composition brachium pontis, it is characterised in that described transmitting antenna is launched antenna and big inductance quantity transmission antenna group by small inductor amount
Becoming, described switch has three groups, and one of which is common set, and three groups of switches launch antenna and big inductance quantity transmitting sky with small inductor amount
Line separately constitutes full-bridge radiating circuit.
CN204906195U discloses a kind of electromagnetics transmitter, and described electromagnetics transmitter includes: generating set, three phase rectifier
Bridge, filter capacitor, one-level inverter bridge, resonant inductance, every value electric capacity, high frequency transformer, high-frequency rectification bridge, LC filter circuit and
Two grades of inverter bridge；Wherein, described generating set is connected with described three-phase commutation bridge, for output AC electricity to described three phase rectifier
Bridge；The outfan of described three-phase commutation bridge is connected with described filter capacitor, for being formed after the three-phase alternating current electric rectification of input
Unidirectional current exports described filter capacitor, and the outfan of described filter capacitor is connected with described one-level inverter bridge, for receiving
Unidirectional current be filtered after output to described one-level inverter bridge, the outfan of described one-level inverter bridge and described high frequency transformer
Former limit connect, for the filtered DC inverter that receive is produced ac square wave and exports and arrive described high frequency transformer
Former limit；The secondary of described high frequency transformer connects with described high-frequency rectification bridging, defeated after the ac square wave boosting that will receive
Going out to described high-frequency rectification bridge, the outfan of described high-frequency rectification bridge is connected with described LC filter circuit, for by described boosting
After ac square wave rectification formed direct current square wave, described LC filter circuit is connected with described two grades of inverter bridge, be used for by reception
The filtering of direct current square wave forms unidirectional current, and described two grades of inverter bridge produce different square waves also after the unidirectional current of reception is carried out inversion
Output is to output port；Described resonant inductance with described every value capacitances in series at described one-level inverter bridge and described high frequency transformer
Former limit between circuit on, each power device of described one-level inverter bridge is parallel with filter capacitor, described filter capacitor,
Resonant inductance forms resonant tank with every value electric capacity, is used for controlling described one-level inverter bridge；Described electromagnetics transmitter also include with
The auxiliary current source network that the lagging leg of described one-level inverter bridge is in parallel, for regulating the lagging leg of described one-level inverter bridge
Voltage during turning on and off.
CN1445915A discloses a kind of Sofe Switch isolated converter for EMUs, becomes for isolating the switch of transformation
The rectified device of secondary of depressor is directly connected on output filter capacitor, in the topological structure of conventional high frequency switching converter device
In, switch by the controllable constant-current source rate of doing work, by the simplification of such circuit structure, it is provided that a kind of not input, output chokes
The Sofe Switch isolated converter of inductance, time in start-up course, steady operation and load short circuits protection time the most not to input voltage
Sources etc. produce dash current, and the power tube in output rectifier part, controllable constant-current source is all Sofe Switch, thus reduce switch
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 the impact that in the exploration of positive ocean controllable source electromagnetism (MCSEM), sea-floor electromagnetic is responded by air wave, when shallow water area is explored,
It interacts with the useful signal from subsea strata, can flood the useful signal from stratum, hinder shallow water area MCSEM
The application of exploration.This paper, based on air or unlimited water layer model, utilizes the air wave that water and air layer interface produce in sea
Decay reverberation letter is formed between the end and sea water-Air Interface.
During the work of artificial source's electromagnetic method, it is provided with the electromagnetic signal of certain frequency, this letter to wire first with transmitter
Ceasing the electromagnetic field being sent change by ground electrode to underground, electromagnetic field is during underground propagation, and meeting is at subsurface anomaly
Body inspires faradic current, by the receiver of surface deployment, receives the current potential that different frequency of supply is formed, by analyzing this
Kind of electric potential signal, reaches the purpose (can for example, see Fig. 1) of Underground different depth objective body.
As it is shown in figure 1, emission mode is centralized transmitting, i.e. in artificial field source magnetotelluric method is explored, Electromagnetic Launching
Machine injects alternating current according to certain emitter stage away to the earth, and receiver, by obtaining the response of earth medium pair, builds
The distributed intelligence of underground medium electrical conductivity.Owing to two ground electrodes being connected with electromagnetics transmitter are apart from generally large, need
Transfer wire that will be longer connects transmitter and ground connection, so could form complete loop, it is achieved electromagnetic signal effectively transmits
Function.
Seeing Fig. 2, this figure is centralized artificial source's electromagnetics transmitter topological diagram.380V alternating current is confessed by generating set,
Alternating current is through soft start, uncontrollable rectifier bridge, inverter bridge H1, high frequency transformer, high-frequency rectification bridge, LC filtering, inversion output
Deng eight circuit modules, it is transformed to Rectified alternating current；Wherein, uncontrollable rectifier bridge is made up of four unilateral diodes；Inverter bridge H1
Being made up of 4 powerful transistors, control circuit by 4 drive waveforms, will arrange filtered DC inversion is high frequency
(20KHz) alternating current；It is high-frequency and high-voltage alternating current through high frequency transformer by voltage lifting again, by high-frequency rectification bridge, LC
Wave filter is changed into accurate steady direct current；It is high-frequency square-wave signal finally by inversion output part inversion, via transmission line
It is injected into emission electrode A and emission electrode B, and is fed in the earth by emission electrode A and emission electrode B.
But, from the principles of electric and electronic engineering, transmission line exists the parasitic parameters such as parasitic capacitance, stray inductance, dead resistance,
Transmission line is the longest, and the impact of this parasitic parameter is the biggest, and dead resistance can reduce the current value of output accordingly.Stray inductance increases
Add the rise time of emission current, make output current phase lag behind output voltage.When two electrodes lay respectively at transmitter
Both sides, transmission line is drawn towards rightabout completely, so the parasitic capacitance on transmission line can have the counteracting of certain procedures, but
If transmitter is not in 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 the least.
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 becomes big, launches
Current peak 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, electric current is effective
Value reduces, and finally makes the power reduction that transmitter is launched.This area needs a kind of electromagnetism that can effectively overcome described defect
Transmitter system and control method.
Summary of the invention
The present invention is directed to the drawbacks described above of prior art, from how improving the high power transmitter energy power of electromagnetics transmitter, increasing
The angle adding high frequent current peaks is set out, and proposes a kind of new distribution type electromagnetics transmitter system and control method.This electromagnetism is sent out
The system of penetrating can be effectively improved the peak value of high-frequency emission electric current with flexible configuration transmitter power capacity.
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: many power supplys mould
Block, multi-emitting module, and optional control module；
Described multi-power module is by by parallel for 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, passes selectively
Deliver to many sub-transmitter modules, it is achieved distribution formula emission function；
Described control module is realized main control logic by FPGA, MCU realize the number of transmitter and computer software
According to communication.Wherein FPGA (Field-Programmable Gate Array) i.e. field programmable gate array.MCU
(Microcontroller Unit) i.e. micro-control unit.
Preferably, in described multi-power module, common power generation unit send the alternating current of 380V, and handing over
Stream electrically communicate to the outfan of power generation unit；Outfan is in parallel many groups of high-power AC/DC power supply change-over devices, by 380V
Alternating voltage is converted into a DC 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 real work needs,
It is connected from different ground electrodes；By computer software control, select different sub-transmitter modules and different ground electrodes
It is connected；Realize different launch position and emitter stage away from the case of good transmitting.
It is highly preferred that in described multi-power module, common power generation unit send the alternating current of 380V, and will
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, pass through host computer
Software can configure the output grade of each AC/DC power module, and multiple AC/DC parallel connections can be effectively improved emission system
Output；Dc bus connects multiple transmitter modules, and each transmitter module is arranged close to the position of ground electrode, each
The corresponding ground connection emission electrode of transmitter module；Select to enable concrete transmitter module by upper computer software, it is possible to by multiple
DC voltage is sent to transmitter module selectively.In a preferred embodiment, power module circuit to main correspondence
Topological structure is: power supply AC 380V is power frequency electric power generating set, and the output of threephase generator is connected to AC/DC module not
Control rectifier outlet side, 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 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 every straight electricity
One end of container C2, the other end of C2 is connected to high frequency transformer with another outfan of high-frequency inversion bridge, and high frequency transformer is defeated
Go out side to be made up of two groups of vice-side winding, 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.
In described diode D1-D6 and transistor S1-S4, Embedding Material is organosilicon material.Further, have described in
Machine silicon materials are 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 in double-planet power mixer, in rotation
Stir 0.5～1h under conditions of speed 200～1000r/min, revolution speed 10～20r/min and prepare component A；
(2) 80～90 parts of vinyl silicone oils, 5～25 parts of commercially available polysiloxane chain extender, 0.5～5 part of commercial silanes are handed over
Connection agent and 0.1～1 part of maleat base ester inhibitor add in double-planet power mixer, at rotational velocity 200～
Stir 0.5～1h under the conditions of 1000r/min, revolution speed 10～20r/min and prepare component B；
(3) by A, B 1: 3～3: 1 mix homogeneously final vacuum deaeration in molar ratio, then solidify in thermostatic drying chamber and get final product
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；Preferably its combination thing, two
The ratio of person is preferably 1: 10～1: 5 (weight).
When using this organosilicon material embedding, through vibration, high/low temperature storage, mechanical shock, Steadydamp-heat and temperature cycles
Deng test, fully meet every factor evaluation test of encapsulation producer.
Further, 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, with calculating
Machine software communication, with FPGA module communication.
Preferably, the start/stop time of tranmitting frequency information and transmitting is previously written in tf card, and when powering on, MCU is connect by SDIO
Mouth imports frequency and temporal information from tf card；MCU is by SPI interface and FPGA module communication, during by frequency information and transmitting
Between information be written in FPGA in the depositor of correspondence, and from FPAG, read the letter such as busbar voltage, emission current and gps time
Breath；MCU, by UART interface and computer software communication, receives 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 electric power
Generating set sends the alternating current of 380V, and alternating current is sent to the outfan of power generation unit；Many groups in parallel of outfan
High-power AC/DC power supply change-over device, is converted into a DC voltage by 380V alternating voltage；Optionally, by multiple DC voltages
Send transmitter module selectively；Design multiple different sub-transmitter module, according to real work needs, can connect from different
Ground electrode is connected；By computer software control, different sub-transmitter modules is selected to be connected from different ground electrodes, it is achieved no
With 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 that resolve command is believed
Breath, 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 answering in artificial field source magnetotelluric method is explored
With, for building the distributed intelligence of underground medium electrical conductivity.
Preferably, it, by improving the high power transmitter energy power of electromagnetics transmitter, increasing high frequent current peaks, realizes electricity
Effective transmission of magnetic 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 the multiple (500V---of 380V AC-to DC
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 the defeated of power generation unit
Go out end；Outfan is in parallel many groups of high-power AC/DC power supply change-over devices, can be converted into a unidirectional current 380V alternating voltage
Pressure；Multiple DC voltages can be sent transmitter module selectively.
2) multi-emitting module: by many sub-transmitter modules, the multiple d. c. voltage signals converted, selectively
It is sent to many sub-transmitter modules, it is achieved distribution formula emission function.Specifically: devise multiple different sub-transmitter module, root
Border job demand factually, can be connected from different ground electrodes；By computer software control, different sons is selected to launch mould
Block is connected from different ground electrodes；Realize different 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, in parallel by multiple AC/DC convertor (AC/DC), real
Multiple (500V---1000V) conversion of existing 380V AC-to DC, this module has the function of voltage-regulation.Specifically: by general
Logical power generation unit sends the alternating current of 380V, and alternating current is sent to the outfan of power generation unit；Outfan
Many groups of high-power AC/DC power supply change-over devices in parallel, can be converted into a DC voltage 380V alternating voltage；Organize AC/ more
DC power module output-parallel to dc bus, can configure the output work of each AC/DC power module by soft the opening of host computer
Rate grade, multiple AC/DC parallel connection can be effectively improved the output of emission system.Dc bus connects multiple transmitter modules, often
Individual transmitter module is arranged close to the position of ground electrode, the corresponding ground connection emission electrode of each transmitter module.By upper
Machine software selects to enable concrete transmitter module, 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, the output of threephase generator is connected to the uncontrollable rectifier device outlet side of AC/DC module, as shown in Figure 4,
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 connects
Receiving 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, C2
Another outfan of the other end and high-frequency inversion bridge be connected to high frequency transformer, high frequency transformer outlet side by two groups of secondary around
Group is constituted, series connection output after rectifying and wave-filtering respectively.AC/DC power inverter realizes the conversion of AC-to DC, and has electricity
The functions such as pressure regulation, front stage isolation, output overvoltage overcurrent protection, soft start.
Specifically, for multi-emitting module: as it is shown on figure 3, select sub-transmitter module 1 and son to launch by upper computer software
Module 2 enables, and other modules are closed, and now corresponding position of launching is that the ground electrode at spontaneous emission module 1 launches mould with son
Ground electrode at block 2, emitter stage is away from for the distance between above-mentioned two ground electrode.It is similar to, can be soft by host computer
It is flexible away from switching emission electrode that part selects other modules of enable to carry out launching to constitute different transmitting positions and emitter stage.
Two transmitter modules also can be only installed.
For the transmitter module in Fig. 3 to the concrete line topological figure of main correspondence as shown in Figure 5.
In transmitter module, the multiple d. c. voltage signals converted, can there is selection by many sub-transmitter modules
Be sent to many sub-transmitter modules, it is achieved distribution formula emission function.Specifically: devise multiple different sub-transmitter module,
Each transmitting submodule comprises the transmitting half-bridge being made up of two transistors, and the continuous current circuit being made up of a transistor, by two
The single-phase conducting filter circuit that pole pipe and thin-film capacitor are constituted.According to real work needs, can be from different ground electrode phases
Even；By computer software control, different sub-transmitter modules is selected to be connected from different ground electrodes；Realize different transmittings
Position and 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 testing circuit,
By GPS time service circuit, waveform control circuit, drive circuit, voltage detecting circuit, current detection circuit, signal conditioning circuit structure
Become.
In control structure module, transmitter overall control architecture block diagram as shown in Figure 6, is realized main control by FPGA
Logic, is realized the data communication of transmitter and computer software by MCU.The major function of FPGA includes resolve command information, reads
Take gps time, calculate and launch frequency, produce IGBT synchronized signal, gather voltage, current information.
MCU major function includes preservation and the reading of configuration information, and computer software communication, with FPGA module communication.
The start/stop time of tranmitting frequency information and transmitting is previously written in tf card, and when powering on, MCU is imported from tf card by SDIO interface
Frequency and temporal information.Frequency information and information launch time, by SPI interface and FPGA module communication, are written to by MCU
In depositor corresponding in FPGA, and from FPAG, read the information such as busbar voltage, emission current and gps time.MCU passes through
UART interface and computer software communication, receive the control command that computer software sends, by emission state, voltage, electric current,
The information such as 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, and voltage signal detects
Use isolated amplifier AD202 as detecting element.AD202 is coupled by internal transformer, to the input of isolated amplifier and
Output carries out electrical isolation.DC voltage conversion circuit in sheet can carry for input stage, external sensor and signal processing circuit
Confession ± 7.5V, the insulating power supply of 2mA.Current signal collection uses isolated amplifier HCPL-7840 as current measuring element.Main
Current detecting to be used for and the isolation of analogue signal.The AD7606 multipath high-speed AD conversion with SPI interface is selected in digital-to-analogue conversion
Device, can change emitting voltage and current signal simultaneously.Transformation result is transferred in FPGA by SPI interface, via
MCU is transferred to computer control software 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 embodiments of the present invention are not limited to
This.
Embodiment 1
Use the present invention said system, on computer control software, selects two transmitting submodules, system of selection by
Concrete emission detection task determines, computer control software transmitting control commands, opens and two submodules of selection of configuration,
One of them module is configured to electrode A, and another module is configured to electrode B, launches submodule according to the control life received
Make and select corresponding drive waveforms (as shown in Fig. 7-1 and 7-2) with configuration information.Wherein IGBT in S1 drive waveforms corresponding diagram 5
Module S1, IGBT module S2 in S2 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) are that centralized transmitter is launched with the distributed frame according to embodiment 1 respectively
Machine transmitted waveform comparison diagram in laboratory conditions, is respectively adopted the output voltage and electric current collected when 40V and 80V powers
Oscillogram, wherein Fig. 8 (a), (b) are centralized transmitter transmitted waveform figures, and Fig. 9 (a), (b) are distributed frame transmitted waveforms
Figure.Table 1 is the peak point current data that two kinds of emitting structurals export 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, there is considerably higher sending out
Penetrate current peak.
This written description uses the open present invention of example, including optimal mode, and also enables those skilled in the art
Manufacture and use the present invention.The present invention can patentable scope be defined by the claims, and can include this area skill
Other example that art personnel expect.If other example this has the structural elements of the literal language not differing from claims
Element, if or other example this include the equivalent structure element without substantial differences of the literal language with claims,
Other example the most this is intended to be within the scope of claims.Under not resulting in inconsistent degree, by reference
By herein with reference to all references in place of be incorporated herein.
Claims (8)
1. a distributed electromagnetic transmitter system, this system includes: multi-power module, multi-emitting module, and optionally controls
Module；
Described multi-power module is by parallel by multiple AC/DC power modules, it is achieved 380V exchanges 500V-1000V direct current
Multiple 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, is sent to selectively
Many sub-transmitter modules, it is achieved distribution formula emission function；
Described control module is realized main control logic by FPGA, MCU the data realizing transmitter and computer software are led to
Letter；
Wherein in described multi-power module, common power generation unit send the alternating current of 380V, and exchange fax
Deliver to the outfan of power generation unit；Outfan is in parallel many groups of high-power AC/DC power modules, turn 380V alternating voltage
Change multiple DC voltage into；It is optionally possible to multiple DC voltages are sent selectively to transmitter module；
Wherein in described multi-emitting module, devise multiple different sub-transmitter module, according to real work needs, from different
Ground electrode be connected；By computer software control, different sub-transmitter modules is selected to be connected from different ground electrodes；Real
Existing the most different launch position and emitter stage away from the case of optimal transmitting.
2., according to the system described in aforementioned claim 1, wherein in described multi-power module, many group AC/DC power modules are defeated
Go out to be parallel to dc bus, the output grade of each AC/DC power module can be configured by soft the opening of host computer, multiple
The parallel connection of AC/DC power module can be effectively improved the output of emission system；Dc bus connects multiple transmitter modules, each
Transmitter module is arranged close to the position of ground electrode, the corresponding ground connection emission electrode of each transmitter module；Pass through host computer
Software selects concrete transmitter module, it is possible to multiple DC voltages are sent to transmitter module selectively.
System the most according to claim 2, wherein the wire topologies corresponding to power module is: power supply AC 380V
For power frequency electric power generating set, the output of threephase generator is connected to the uncontrollable rectifier device outlet side of AC/DC power module, does not controls
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 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, and C2's is another
One end is connected to high frequency transformer with another outfan of high-frequency inversion bridge, and high frequency transformer outlet side is by two groups of vice-side winding structures
Become, series connection output after rectifying and wave-filtering respectively；AC/DC power module realizes the conversion of AC-to DC, and have voltage-regulation,
Front stage isolation, output overvoltage overcurrent protection, these functions of soft start.
4., according to system in any one of the preceding claims wherein, wherein the major function of FPGA includes resolve command information,
Read gps time, calculate and launch frequency, produce IGBT synchronized signal, gather voltage, current information；MCU major function bag
Including preservation and the reading of configuration information, and computer software communication, with FPGA module communication.
System the most according to claim 4, the start/stop time of tranmitting frequency information and transmitting is previously written in tf card, powers on
Time MCU from tf card, import frequency and temporal information by SDIO interface；MCU, will frequency by SPI interface and FPGA module communication
Rate information and information launch time are written in FPGA in the depositor of correspondence, and read busbar voltage from FPGA, launch electricity
Stream and these information of gps time；MCU, by UART interface and computer software communication, receives the control that computer software sends
Emission state, voltage, electric current, these information of gps time are sent to computer software by order.
6. the method controlling system according to any one of claim 1-5, the method includes:
Sent the alternating current of 380V by common power generation unit, and alternating current is sent to the output of power generation unit
End；The high-power i.e. changer of AC/DC power module 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 meter
Calculation machine software controls, and selects different sub-transmitter modules and different ground electrodes to be connected, it is achieved different transmitting position and sending out
Emitter-base bandgap grading away from the case of optimal transmitting；
In transmitter overall control architecture, FPGA realize main control logic, MCU realize transmitter soft with computer
The data communication of part；The major function of FPGA includes resolve command information, reads gps time, calculates and launches frequency, produces IGBT
Synchronized signal, gathers voltage, current information.
7. the method for system described in any one of claim 1-5 or claim 6 is in artificial field source magnetotelluric method is explored
Application, for building the distributed intelligence of underground medium electrical conductivity.
Application the most according to claim 7, it is by improving the high power transmitter energy power of electromagnetics transmitter, increasing high-frequency electrical
Stream peak value, realizes effective transmission of electromagnetic signal, thus builds the distributed intelligence of underground medium electrical conductivity.
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| CN202798170U (en) * | 2012-07-31 | 2013-03-13 | 中国科学院地质与地球物理研究所 | Transient electromagnetic emission apparatus and transient electromagnetic emission system |
| CN103346675A (en) * | 2013-07-11 | 2013-10-09 | 北京工业大学 | High-power cascading electromagnetic emitter system with voltage continuously adjustable in wide range |
| CN105186888A (en) * | 2015-09-18 | 2015-12-23 | 北京工业大学 | Large power electromagnetic exploration constant current emitter and modulation method of the same |
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| CN202798170U (en) * | 2012-07-31 | 2013-03-13 | 中国科学院地质与地球物理研究所 | Transient electromagnetic emission apparatus and transient electromagnetic emission system |
| CN103346675A (en) * | 2013-07-11 | 2013-10-09 | 北京工业大学 | High-power cascading electromagnetic emitter system with voltage continuously adjustable in wide range |
| CN105186888A (en) * | 2015-09-18 | 2015-12-23 | 北京工业大学 | Large power electromagnetic exploration constant current emitter and modulation method of the same |
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