CN202512251U - Marine controlled-source electromagnetic surveying system - Google Patents
Marine controlled-source electromagnetic surveying system Download PDFInfo
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- CN202512251U CN202512251U CN2012200092654U CN201220009265U CN202512251U CN 202512251 U CN202512251 U CN 202512251U CN 2012200092654 U CN2012200092654 U CN 2012200092654U CN 201220009265 U CN201220009265 U CN 201220009265U CN 202512251 U CN202512251 U CN 202512251U
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Abstract
The utility model relates to a marine controlled-source electromagnetic surveying system comprising an on-board portion of the system, a towing rope and an underwater portion of the system. The on-board portion of the system includes a generator set, a step-up transformer, a rectifier bridge, and a monitoring platform; the towing rope is a transmission cable; and the underwater portion of the system includes two inverters, a step-down transformer, a rectifier bridge, an emission bridge and an electrode assembly. The generator set supplies a three-phase power source for the system; an inversion circuit and a rectification circuit are used for signal transmission as well as completion of AD-DC conversion and DC-AC conversion of the power source during the emission process; transformer transformation circuits are used for voltage level conversion so as top carry out signal transmission and emission conveniently; a voltage detection circuit and a current detection circuit are used for realizing real-time detection of output voltages and output currents so as to provide real-time signals for a control circuit that is a central processing unit. According to the utility model, reliability of signal transmission of the system can be improved; the cable requirement can be reduced; and the economical cost can be lowered.
Description
Technical field
The utility model relates to a kind of ocean controllable source electromagnetic prospecting system, belongs to marine electromagnetic exploration engineering field.
Background technology
The submarine geophysics detection instrument is an important means of surveying oceanic mineral resources, also is development trend in recent years.Ocean controllable source electromagnetic prospecting system plays important effect as an important branch of submarine geophysics detection instrument in the process of seabed deep water hydrocarbon resource detection.Ocean controllable source electromagnetic prospecting system comprises ocean controllable source electromagnetic survey emission coefficient and ocean controllable source electromagnetic survey receiving system; Wherein ocean controllable source electromagnetic survey emission coefficient is the core of whole exploration system, generally comprises three parts: the underwater portion of generate electricity on the ship of system monitor supervision platform, towing cable and system.Because the active demand of resources such as submarine oil makes the seafari technical development very swift and violent.
Use the company of ocean controllable source electromagnetic prospecting system lift-off technology comparative maturity to mainly contain OHM company and EMGS company at present abroad, the launching technique common characteristic of two companies is that power supply signal on the ship is reached what adopt under the ocean all is that alternating current transmits.That wherein the launching technique of OHM company adopts is 208 ~ 480VAC, and that EMGS company adopts is 360 ~ 480VAC.At present these two company's prevailing controllable source electromagnetic survey launching techniques exist main deficiency be in signals transmission, cable is required too high; Loss is excessive in the long-distance transmissions process; Make system's efficient when signal is launched on the low side, problem such as system stability is bad.
The utility model content
The utility model is to the deficiency of present ocean controllable source electromagnetic prospecting system launching technique prior art; From improving the system signal transmission reliability, reducing the cable requirement; Reduce financial cost and provide the angle of system stability to set out, a kind of ocean of utility model controllable source electromagnetic prospecting system launching technique.
For realizing above-mentioned purpose, the utility model is a kind of ocean controllable source electromagnetic prospecting system launching technique, and it is characterized in that: this system is divided into three parts: the underwater portion of generate electricity on the ship of system monitor supervision platform, towing cable and system.The generating monitor supervision platform comprises genset, step-up transformer, three-phase commutation bridge and PC monitor supervision platform on the ship of system; Towing cable is a transmission cable; The underwater portion of system comprises inverter, step-down transformer, single-phase rectification bridge, emission bridge and electrode assemblie.Wherein, the genset output port links to each other with the step-up transformer input port; The output port of step-up transformer connects the three-phase commutation bridge input port; The three-phase commutation bridge output port connects the towing cable input port; The output port of towing cable connects the inverter input port, and the inverter output end mouth links to each other with the input port of step-down transformer, and the step-down transformer output port connects the input port of single-phase rectification bridge; The output port of single-phase rectification bridge connects the input port of emission bridge, the output port connection electrode assembly port of emission bridge; The input port of voltage detecting circuit is connected with the output port of single-phase rectification bridge, and the output port of voltage detecting circuit connects an input port of CPU; The input port of current detection circuit is connected with the electrode assemblie port, and the output port of current detection circuit connects another input port of CPU; The CPU output port is connected with the inverter input port, and the PC monitor supervision platform of the monitor supervision platform that generates electricity on CPU and the ship simultaneously is connected; Wherein CPU comprises DSP control module, FPGA unit, DDS unit, PWM driver module and high-power stimulating module.
Genset is that power is provided is 30 ~ 60KVA in system in the system; Frequency is that 50HZ, voltage are the 3 mutually unstable power supplys of 380V; Above-mentioned power supply is after the step-up transformer of 1:4 boosts through no-load voltage ratio, and obtaining frequency through the three-phase commutation bridge rectifying and wave-filtering is that 50HZ, voltage are the single-phase DC power supply of 1719 ~ 2579V; Above-mentioned single-phase DC power supply is delivered to the benthos of seabed 1 ~ 4Km through towing cable; Through inverter the single-phase DC power inverter that receives to be become frequency be the single-phase alternating current of 10K ~ 20KHZ to the underwater portion of system then, is the step-down transformer step-down of 31:1 ~ 6:1 through no-load voltage ratio again, and the acquisition frequency is 10K ~ 20KHZ; Amplitude voltage is the alternating voltage of 65 ~ 318V; Pass through the single-phase rectification bridge rectifying and wave-filtering afterwards, obtain the DC bus-bar voltage of 54 ~ 270V, above-mentioned DC bus-bar voltage is passed through the inversion of emission bridge; Acquisition power is 27 ~ 54KW, and electric current is transmitting of 200 ~ 500A; Above-mentioned transmitting realized under central processing unit controls and emission.System monitors the DC bus-bar voltage of single-phase rectification bridge output and the transmitter current on the electrode assemblie in real time, and with above-mentioned DC bus-bar voltage, transmitter current input CPU; DSP control module in the CPU utilizes the PWM driver module to realize the inversion of inverter through the PWM modulation, again through being transmitted after single-phase rectifier, the inversion of emission bridge; Receive the FPGA unit controls launch time that wherein transmits; The FPGA unit receives the real-time synchronizing signal of GPS that ocean controllable source electromagnetic prospecting system receiving unit sends; Above-mentioned real-time synchronizing signal is synthetic through numerical frequency synthesis unit (DDS); Realize the real-time synchronized transmissions of emission bridge by high-power excitation driver module again, making transmits sends; On the ship in the generating monitor supervision platform PC monitor supervision platform monitor in real time seabed DC bus-bar voltage, the electric current that transmits, frequency and launch time the duration relevant information, realize control through human-computer interaction simultaneously to DC bus-bar voltage, the electric current that transmits, frequency and launch time, duration.
Further, described three-phase commutation bridge is 3 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
Further, described inverter is 2 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
Further, described single-phase rectification bridge is 2 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
Further, described emission bridge is 2 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
The described rectifier bridge of system, inverter bridge adopt electric power FET (Metal Oxide Semiconductor Filed Effect Transistor), insulation gate pole bipolar transistor (Insulated Gate Bipolar Transistor), SPM (Intelligent Power Module), MOS control thyristor (MOS Controlled Thyristor), integrated gate commutated thyristor (Integrated Gate Commutated Turn-off Thyristor), preferred IGBT, IPM.Because the input impedance of IGBT is high, Control of Voltage, driving power is little, switching speed is fast, and frequency of operation can reach 10 ~ 40KHz, and saturation pressure reduces, and voltage, current capacity are bigger, the safety operation area broad.
The characteristics of the utility model are: system uses for reference the newest fruits of switch power technology in the dark spy in ocean; Generating monitor supervision platform in system directly boosts the unstable three-phase supply that genset provides; Adopt the AC-DC converter technique to carry out rectifying and wave-filtering then, obtaining the direct current signal of high voltage, low current, DC voltage is transferred under the ocean through towing cable; Adopt the DC-AC inversion transformation technique afterwards; Regulate through DC bus-bar voltage, transmitter current feedback signal being carried out PI, utilize DSP to pass through the PWM modulation and realize shutoff control, to obtain high stable, high linearity and high-frequency transmitting to switching device in the inverter.The advantage of this scheme implementation is: the long Distance Transmission of high voltage direct current, significantly reduced the loss of energy in the transmission course, and whole emission coefficient efficient can reach more than 90%; Greatly reduce the cost of transmission cable, reduced the kelvin effect that the system signal transmission possibly cause, simultaneously owing to galvanic reason has significantly reduced the interference to feedback signal.In addition, system adopt pulse width modulation controlled policy control rectifier bridge DC side voltage, stablize the transmitter current of inverter bridge.Make the stability of whole emission coefficient significantly descend to the dependence that emission load and genset send voltage.
Description of drawings
Fig. 1 is ocean controllable source electromagnetic prospecting system launching technique circuit topological structure figure.
Fig. 2 is an ocean controllable source electromagnetic prospecting system launching technique control principle block diagram.
Fig. 3 is an ocean controllable source electromagnetic prospecting system launching technique functional block diagram
Fig. 4 is a system ship top three-phase commutation bridge.
Fig. 5 is an inverter.
Fig. 6 is a single-phase rectification bridge.
Fig. 7 is the emission bridge.
Fig. 8 is that the PWM modulation duty cycle is 47% control square wave.
Concrete label is following among the figure:
1. genset
2. step-up transformer
3. three-phase commutation bridge
4. towing cable
5. inverter
6. step-down transformer
7. single-phase rectification bridge
8. emission bridge
9. emitting electrode group
A, b, c, d: four IGBT devices that model is CM200DY-34A
Embodiment
Embodiment according to accompanying drawing narration the utility model.
Instance one:
As shown in Figure 1, the hardware circuit embodiment of the utility model is following:
Genset is that power is provided is 30KVA in system in the system; Frequency is that 50HZ, voltage are the 3 mutually unstable power supplys of 380V; Above-mentioned power supply is after the step-up transformer of 1:4 boosts through no-load voltage ratio, and obtaining frequency through the three-phase commutation bridge rectifying and wave-filtering is that 50HZ, voltage are the single-phase DC power supply of 2000 ± 10%V; Above-mentioned single-phase DC power supply is delivered to the benthos of seabed 4Km through towing cable; Through inverter the single-phase DC power inverter that receives to be become frequency be the single-phase alternating current of 20KHZ to the underwater portion of system then, is the step-down transformer step-down of 18:1 through no-load voltage ratio again, and the acquisition frequency is 20KHZ; Amplitude voltage is the alternating voltage of 108 ± 5%V; Pass through the single-phase rectification bridge rectifying and wave-filtering afterwards, obtain the DC bus-bar voltage of 54 ± 1%V, above-mentioned DC bus-bar voltage is passed through the inversion of emission bridge; Acquisition power is 27KW, and electric current is transmitting of 500A; Above-mentioned transmitting realized under central processing unit controls and emission: system monitors the DC bus-bar voltage of single-phase rectification bridge output and the transmitter current on the electrode assemblie in real time, and with above-mentioned DC bus-bar voltage, transmitter current input CPU; DSP control module in the CPU utilizes the PWM driver module to realize the inversion of inverter through the PWM modulation, again through being transmitted after single-phase rectifier, the inversion of emission bridge; Receive the FPGA unit controls launch time that wherein transmits; The FPGA unit receives the real-time synchronizing signal of GPS that ocean controllable source electromagnetic prospecting system receiving unit sends; Above-mentioned real-time synchronizing signal is synthetic through numerical frequency synthesis unit (DDS); Realize the real-time synchronized transmissions of emission bridge by high-power excitation driver module again, making transmits sends.On the ship in the generating monitor supervision platform PC monitor supervision platform monitor in real time seabed DC bus-bar voltage, the electric current that transmits, frequency and launch time the duration relevant information, realize control through human-computer interaction simultaneously to DC bus-bar voltage, the electric current that transmits, frequency and launch time, duration.This moment, the PWM waveform duty cycle of modulation was 50%.
In the utility model practical implementation; The type selecting of three-phase commutation bridge is that VUO-160-16-NO7, the inverter bridge type selecting of German IXYS company is the CM200DY-34A of Mitsubishi; The type selecting of single-phase rectification bridge is the VBE-100-12-NO7 of German IXYS company, and the dsp processor type selecting is the TMS320F2812 of Texas Instruments.
Instance two:
Like Fig. 1, the hardware circuit embodiment of the utility model is following:
This utility model is divided into three parts: the underwater portion of generate electricity on the ship of system monitor supervision platform, towing cable and system.The generating monitor supervision platform comprises genset, step-up transformer, three-phase commutation bridge and PC monitor supervision platform on the ship of system; Towing cable is a transmission cable; The underwater portion of system comprises inverter, step-down transformer, single-phase rectification bridge, emission bridge and electrode assemblie.Wherein, the genset output port links to each other with the step-up transformer input port; The output port of step-up transformer connects the three-phase commutation bridge input port; The three-phase commutation bridge output port connects the towing cable input port; The output port of towing cable connects the inverter input port, and the inverter output end mouth links to each other with the input port of step-down transformer, and the step-down transformer output port connects the input port of single-phase rectification bridge; The output port of single-phase rectification bridge connects the input port of emission bridge, the output port connection electrode assembly port of emission bridge; The input port of voltage detecting circuit is connected with the output port of single-phase rectification bridge, and the output port of voltage detecting circuit connects an input port of CPU; The input port of current detection circuit is connected with the electrode assemblie port, and the output port of current detection circuit connects another input port of CPU; The CPU output port is connected with the inverter input port, and the PC monitor supervision platform of the monitor supervision platform that generates electricity on CPU and the ship simultaneously is connected; Wherein CPU comprises DSP control module, FPGA unit, DDS unit, PWM driver module and high-power stimulating module.
The control circuit embodiment of the utility model is following:
By the bus DC voltage of dsp processor processing collected single-phase rectification bridge output in the CPU and the current data of emitter output, launch the signal of control inverter, reach permanent steady emission purpose.The implementation of its DSP output waveform is the bus DC voltage of collection single-phase rectification bridge output and the electric current of emitter; Be input in the dsp processor as feedback; Dsp processor is inner to be calculated through PI; Draw control corresponding mode and corresponding dutycycle, the control signal after the output of the event manager module of dsp processor is calculated then realizes the control purpose.Fig. 8 is to be 47% square-wave signal through the dutycycle that PWM modulates out; Wherein alternately output of channel signal (1), (4) and channel signal (2), (3); The alternately shutoff of switching device IGBT (a, d) and switching device IGBT (c, b) in the control chart 5, the precision of control system output voltage stabilizing.Because emitter transmitter current maximal value at present can not be greater than 500A, therefore, when the PWM waveform duty cycle of modulation was too small, should adjust the no-load voltage ratio of step-down transformer this moment, and like the modulation waveform of Fig. 8, the no-load voltage ratio of step-down transformer can not be greater than 17:1.
Claims (5)
1. ocean controllable source electromagnetic prospecting system, it is characterized in that: this system is divided into three parts: the underwater portion of generate electricity on the ship of system monitor supervision platform, towing cable and system; The generating monitor supervision platform comprises genset, step-up transformer, three-phase commutation bridge and personal computer PC machine monitoring platform on the ship of system; Towing cable is a transmission cable; The underwater portion of system comprises inverter, step-down transformer, single-phase rectification bridge, emission bridge and electrode assemblie; Wherein, the genset output port links to each other with the step-up transformer input port; The output port of step-up transformer connects the three-phase commutation bridge input port; The three-phase commutation bridge output port connects the towing cable input port; The output port of towing cable connects the inverter input port, and the inverter output end mouth links to each other with the input port of step-down transformer, and the step-down transformer output port connects the input port of single-phase rectification bridge; The output port of single-phase rectification bridge connects the input port of emission bridge, the output port connection electrode assembly port of emission bridge; The input port of voltage detecting circuit is connected with the output port of single-phase rectification bridge, and the output port of voltage detecting circuit connects an input port of CPU; The input port of current detection circuit is connected with the electrode assemblie port, and the output port of current detection circuit connects another input port of CPU; The CPU output port is connected with the inverter input port, and the personal computer PC machine monitoring platform of the monitor supervision platform that generates electricity on CPU and the ship simultaneously is connected; Wherein CPU comprises digital signal processor DSP control module, on-site programmable gate array FPGA unit, Direct Digital frequency synthesis DDS unit, pulse width modulation (PWM) driver module and high-power stimulating module.
2. application rights requires 1 described a kind of ocean controllable source electromagnetic prospecting system, it is characterized in that: described three-phase commutation bridge is 3 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
3. application rights requires 1 described a kind of ocean controllable source electromagnetic prospecting system, it is characterized in that: described inverter is 2 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
4. application rights requires 1 described a kind of ocean controllable source electromagnetic prospecting system, it is characterized in that: described single-phase rectification bridge is 2 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
5. application rights requires 1 described a kind of ocean controllable source electromagnetic prospecting system, it is characterized in that: described emission bridge is 2 insulation gate pole bipolar type transistor modules, perhaps 1 SPM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200092654U CN202512251U (en) | 2012-01-10 | 2012-01-10 | Marine controlled-source electromagnetic surveying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200092654U CN202512251U (en) | 2012-01-10 | 2012-01-10 | Marine controlled-source electromagnetic surveying system |
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| Publication Number | Publication Date |
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| CN202512251U true CN202512251U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200092654U Expired - Fee Related CN202512251U (en) | 2012-01-10 | 2012-01-10 | Marine controlled-source electromagnetic surveying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707350A (en) * | 2017-03-03 | 2017-05-24 | 北京工业大学 | Multistage module marine electromagnetic surveying system |
| CN106873040A (en) * | 2017-03-15 | 2017-06-20 | 山东大学 | The airborne resistivity forward probe Real-time Collection electrode system of rock tunnel(ling) machine and method |
-
2012
- 2012-01-10 CN CN2012200092654U patent/CN202512251U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707350A (en) * | 2017-03-03 | 2017-05-24 | 北京工业大学 | Multistage module marine electromagnetic surveying system |
| CN106707350B (en) * | 2017-03-03 | 2019-02-12 | 北京工业大学 | A kind of Multi-stage module marine electromagnetic survey system |
| CN106873040A (en) * | 2017-03-15 | 2017-06-20 | 山东大学 | The airborne resistivity forward probe Real-time Collection electrode system of rock tunnel(ling) machine and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20140110 |