CN105717544A - Transient electromagnetic emitting-receiving system for real-time acquisition-storage and data mapping explanation - Google Patents
Transient electromagnetic emitting-receiving system for real-time acquisition-storage and data mapping explanation Download PDFInfo
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Abstract
The invention discloses a transient electromagnetic emitting-receiving system for real-time acquisition-storage and data mapping explanation. The system comprises an embedded computer, a signal conditioning module, a master control circuit, a Hall current sensor connected with an acquiring module; the embedded computer is connected with a data processing and imaging module, the master control circuit is connected with an emitting bridge circuit through a time sequence synchronous conversion circuit and a bridge circuit driving circuit; a constant voltage clamping circuit, an emitting power source module and an emitting coil are connected with the emitting bridge circuit; the emitting coil is connected with a damping matching absorbing circuit and the Hall current sensor; the system is capable of intuitively displaying the emitting current waveform and acquiring the signal waveform, and accurately adjusting the clamping voltage value and the damping matching resistance value according to the difference of the specific environment and the emitting coil, so that the emitting current waveform can be the optimal; the embedded computer is capable of storing the acquired data and transmitting to the data processing and imaging module in real time so as to perform the data mapping explanation and obtain the content and distribution condition of matters in real time.
Description
Technical field
The invention belongs to geophysical exploration instrument, the storage of especially a kind of Real-time Collection and data become the figure transient electromagnetic emitting-receiving system explained.
Background technology
Transient electromagnetic method (TransientElectromagneticMethods, TEM), it is also called TDEM, it it is a kind of application geophysical prospecting method widely, transient electromagnetic method is exactly the alternating impulse electric current utilizing transmitter to produce certain frequency in transmitting coil, excites pulsatile once field, in the intermission of pulsatile once field, receive the secondary electromagnetic field of sensing, by the research of inducted secondary field being obtained subsurface material structure and distributed intelligence.
The collection of existing transient electromagnetic apparatus data and data process and need certain time interval between imaging, real time data figure cannot be become to explain, this causes that efficiency of construction is relatively low, and owing to distribution and the content situation of subsurface material cannot be judged in time, hence in so that construction process exists a degree of blindness, cause the waste of manpower and materials in various degree；
In existing transient electromagnetic apparatus, transmitter and receiver is to separate, and adopts the control system that two sets are independent, and the inaccurate coordination of two cover systems, control model complexity is loaded down with trivial details, due to distance apart from each other, it is impossible to single unit completes work；The transient electromagnetic apparatus separated is made up of numerous modules, and loaded down with trivial details assembling process causes the carrying inconvenience of the reduction of efficiency in engineer applied process, the decline of reliability, instrument；
Existing transient electromagnetic apparatus there is also man machine interface and owes close friend, causes that emission current waveform and signals collecting waveform show not directly perceived.Existing transient electromagnetic emission system control unit is mainly based upon single-chip microcomputer framework, the single-chip microcomputer mode that employing order performs in timing Design, can there is regular hour time delay, the turn-off time of transient electromagnetic emission system is very short, and the turn-off time of emission system is required higher by transient electromagnetic method, therefore small time delay will make the accuracy that data process with imaging decline；
Existing transient electromagnetic apparatus there is also the problems such as emission current waveform turn-off time length, poor linearity, afterbody concussion, current most transient electromagnetic adopts the active constant voltage clamper mode of energy regenerative type, adopt complicated control system, reliability reduces, but also there is clamp voltage and the non-adjustable problem of build-out resistor, it is impossible to optimize emission current waveform according to experimental situation with Bu Tong regulating in real time of transmitting coil.Different clamp voltages is different with the impact of the linearity on the emission current turn-off time, and suitable build-out resistor just can make emission current turn off waveform afterbody without overshoot and the appearance of concussion situation.
It is thus desirable to improve and improve existing transient electromagnetic apparatus, develop the transient electromagnetic emitting-receiving system realizing Real-time Collection storage and data one-tenth figure explanation.
Summary of the invention
The technical problem to be solved is in that the transient electromagnetic emitting-receiving system providing the storage of a kind of Real-time Collection and data one-tenth figure to explain, transient electromagnetic transmitting and reception being melted is a system, the major part of instrument concentrates in a casing, integrated, highly integrated, simplify the connection between module and module, and emission current waveform can be shown intuitively and gather signal waveform, can according to the difference of concrete environment and transmitting coil, regulate clamped voltage value and damping build-out resistor value accurately so that emission current waveform reaches the best；Can transient electromagnetic data is carried out Real-time Collection storage and data one-tenth figure explain, and man machine interface is friendly, it is simple to operating, field construction is more efficiently convenient.
The present invention is achieved in that
The storage of a kind of Real-time Collection and data become the figure transient electromagnetic emitting-receiving system explained, including:
Inserted computer, as man machine interface, by the various parameters of LabVIEW software design patterns transient electromagnetic emitting-receiving system, and the data that real-time storage gathers, and become figure to explain by transient electromagnetic data with image-forming module real time data；
Acquisition module, for receiving the control signal of inserted computer after being connected with inserted computer by data/address bus, and the signal that emission current waveform and transient electromagnetic receiving subsystem are received is acquired；
Governor circuit, is connected with described acquisition module, controls described governor circuit by the Digital I/O of described acquisition module and produces the sequential that transient electromagnetic transmitting needs；
Synchronize change-over circuit, be connected with described governor circuit, for producing bridge control signal and the synchronizing signal of transient electromagnetic reception system；
Transmitting bridge, is connected by drive circuit and synchronizes change-over circuit, and bridge control signal exports described transmitting bridge through drive circuit；
Emission power module, is connected with transmitting bridge for providing required emitted energy for transmitting bridge；
Constant voltage clamp circuit, is connected in parallel on transmitting bridge two ends, and transmitting bridge is carried out constant voltage clamper；
Transmitting coil, after being connected with described transmitting bridge, produces emission current；
Damping coupling absorbing circuit, is connected with described transmitting coil, makes emission current waveform reach the best by described constant voltage clamp circuit and damping coupling absorbing circuit；
Hall current sensor, is converted to voltage signal by the current signal of transmitting coil and sends acquisition module to, and emission current waveform is acquired；
Receiving coil, receives inducted secondary field signal；
Signal-regulated kinase, after being connected with receiving coil, for being nursed one's health by the secondary field signal that receiving coil receives, sends conditioned signal to acquisition module, the secondary field signal received is acquired；
Described acquisition module upload the data to inserted computer and is overlapped showing to signal at LabVIEW software, the data that send to real-time for data are processed and image-forming module by inserted computer, real time data becomes figure explanation, the real-time content obtaining subsurface material and distribution situation.
Further, described acquisition module includes FPGA and AD converter, and FPGA is connected with Hall current sensor and Signal-regulated kinase through AD converter, gathers emission current waveform by Hall current sensor；The latched device of FPGA is connected with governor circuit, FPGA connects and composes through bus and inserted computer, host computer is configured being connected with acquisition module by bus to launching each parameter of reception, and governor circuit is configured by acquisition module by Digital I/O, makes governor circuit produce to launch sequential accordingly.
Further, described Signal-regulated kinase be signal that transmitting coil is adopted successively through pre-amplification circuit, differential amplifier circuit, the last long-distance transmissions of V-I translation circuit to acquisition module；Wherein,
Described pre-amplification circuit provides high input impedance, low noise and gain-adjusted；
Common mode noise rejection is carried out by described differential amplifier circuit, and provides certain additional gain when needed；
The output voltage signal of differential amplifier circuit is converted to current signal long-distance transmissions to acquisition module by described V-I translation circuit, it is to avoid the distortion of signal.
Further, governor circuit is using CPLD as timing generation unit, CPLD produces the clock signal of characteristic frequency, and gives level shifting circuit by this signal, and the low current signal of control part is converted to the big current signal controlling bridge circuit driver circuit by level shifting circuit.
Further, described transmitting bridge module includes four IBGT modules by connecting the H bridge of transmitting coil composition after IBGT block coupled in series between two in the middle of two groups of IBGT modules.
Further, damping coupling absorbing circuit is be connected in parallel on transmitting coil two ends after certain value damping coupling absorption resistance is connected with the build-out resistors organizing specific resistance more, switching switch in parallel in the build-out resistor in each specific resistance.
The present invention is compared with prior art, have the beneficial effects that: Real-time Collection storage and data become the figure transient electromagnetic emitting-receiving system explained to adopt Highgrade integration, transient electromagnetic transmitting and reception being melted is a system, the major part of instrument concentrates in a casing, integration is highly integrated, simplify the connection between module and module, and emission current waveform can be shown intuitively and gather signal waveform, emission current waveform can be made according to the clamped voltage value that difference regulates accurately of concrete environment with transmitting coil to reach the best with damping build-out resistor value, can transient electromagnetic data is carried out Real-time Collection storage and data one-tenth figure explain, and man machine interface is friendly, it is easy to operation, field construction is more efficiently convenient.
The transient electromagnetic emitting-receiving system that Real-time Collection storage and data one-tenth figure explain can transient electromagnetic data is carried out Real-time Collection storage and data one-tenth figure explain, the data that capture card is collected by host computer are directly transmitted to data and process and image-forming module, in real time measuring point data is become figure explanation, the content of real-time determination subsurface material and distribution situation；Adopt Highgrade integration, transient electromagnetic emission system and reception system being melted is a system, the major part of instrument concentrates in a casing, integration is highly integrated, simplify the connection between module and module, and emission current waveform can be shown intuitively and gather signal waveform, emission current waveform can be made according to the clamped voltage value that difference regulates accurately of concrete environment with transmitting coil to reach the best with damping build-out resistor value, improve Real-time Collection storage and data become to scheme the accuracy explained；And man machine interface is friendly, it is simple to operation, field construction is more efficiently convenient.And instrument design adopts charger built-in and lead-acid battery group built-in, simplifies workflow.
Accompanying drawing explanation
Real-time Collection storage and data that Fig. 1 embodiment of the present invention provides become the figure transient electromagnetic emitting-receiving system structured flowchart explained；
The Signal-regulated kinase structured flowchart that Fig. 2 embodiment of the present invention provides；
The acquisition module structured flowchart that Fig. 3 embodiment of the present invention provides；
The transmitting bridge of Fig. 4 embodiment of the present invention offer and the circuit theory diagrams of its peripheral circuit.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, Real-time Collection storage and data become the figure transient electromagnetic emitting-receiving system explained, including: it is connected with acquisition module 6 by inserted computer 5, Signal-regulated kinase 17, governor circuit 7, Hall current sensor 15, governor circuit 7 is connected with transmitting bridge 10 through timing synchronization change-over circuit 8 bridge circuit driver circuit 9, constant voltage clamp circuit 11, emission power module 12, transmitting coil 13 are connected with transmitting bridge 10, and transmitting coil 13 mates absorbing circuit 14 with damping, Hall current sensor 15 connects and composes；220V commercial power interface 1 is connected with lead-acid battery group 3 through lead-acid battery charger 2, lead-acid battery group 3 is connected with power supply module 4, emission power module 12, power supply module 4 provides energy source for each modular circuit, and emission power module 12 is transmitting bridge energy；
Referring to Fig. 2, Signal-regulated kinase 17 is to be connected with Li set of cells 20 through Li battery charger 19 by 220V commercial power interface 18, Li set of cells 20 is connected with signal condition power module 22, low-voltage alarm circuit 21, and receiving coil 16 is connected with acquisition module 6 through pre-amplification circuit 23, differential amplifier circuit 24, V-I translation circuit 25；
Referring to Fig. 3, acquisition module 6 is to be connected with Hall current sensor 15, Signal-regulated kinase 17 through ADC by FPGA26, and the latched device of FPGA26 is connected with governor circuit 7, and FPGA26 connects and composes through USB2.0 bus and inserted computer 5.
Inserted computer 5 arranges the various parameters of transient electromagnetic emitting-receiving system as man machine interface by LabVIEW software design patterns, and the data that real-time storage gathers, and become figure by transient electromagnetic data with image-forming module real time data, it is connected with acquisition module 6 by USB2.0 bus, control governor circuit 7 by the Digital I/O of acquisition module 6 and produce transient electromagnetic transmitting sequential, this sequential produces bridge circuit driver circuit 9 control signal and the synchronizing signal of transient electromagnetic reception system through timing synchronization change-over circuit 8, control signal is finally output to transmitting bridge 10 through bridge circuit driver circuit 9, emission power module 12, required emitted energy is provided for transmitting bridge, constant voltage clamp circuit 11 is connected in parallel on transmitting bridge two ends, transmitting bridge is carried out constant voltage clamper, transmitting coil 13 and transmitting bridge 10, damping coupling absorbing circuit 14, Hall current sensor 15 connects, the current signal collected is sent to acquisition module 6 and signal is overlapped display in the software LabVIEW of inserted computer 5 by Hall current sensor 15, and make emission current waveform reach the best by regulating constant voltage clamp circuit 11 and damping coupling absorbing circuit 14.Signal is nursed one's health by the secondary field signal that receiving coil 16 receives through Signal-regulated kinase 17, finally conditioned signal is sent to the ADC of acquisition module 6, it is acquired to the received signal, it upload the data to inserted computer 5 and be overlapped showing to signal at LabVIEW software, the data that send to real-time for data are processed and image-forming module 27 by inserted computer 5, real time data becomes figure, thus the real-time content obtaining subsurface material and distribution situation.Wherein,
Acquisition module 6 has high-performance collection, without losing code, can carry out software timing triggering or external trigger, inside carries digital filter, sample frequency can software design patterns, have 16 railway digital amounts input, 16 railway digital amount outputs, export band latch function, and power on automatic clear.Four-way synchronous acquisition, convenient extension can be carried out.The FPGA26 of acquisition module 6 is connected with Hall current sensor 15, Signal-regulated kinase 17 through ADC, gathering emission current waveform by Hall current sensor, the signal that receiving coil 16 receives sends the acquisition module 6 secondary field signal to receiving after Signal-regulated kinase 17 to and is acquired；The latched device of FPGA26 is connected with governor circuit 7, FPGA26 connects and composes through USB2.0 bus and inserted computer 5, host computer is configured being connected with acquisition module 6 by USB2.0 bus to launching each parameter of reception, the CPLD of governor circuit is configured by acquisition module 6 by Digital I/O, so that CPLD produces to launch sequential accordingly.
Governor circuit 7 is using the CPLD logical block produced as sequential, the control unit of major part transient electromagnetic emission system is based on the exploitation of single-chip microcomputer framework at present, single-chip microcomputer is employing order executive mode in timing Design, this will cause regular hour time delay, and the operation processing speed of single-chip microcomputer is slow, and the transmitting coil inductance of transient electromagnetic is less, the turn-off time of transient electromagnetic emission system is very little, small time delays will affect the accuracy of data interpretation, and the processing speed of single-chip microcomputer and interrupt resources are also very limited.Therefore selected a low-power-consumption embedded computer 5 as control core, with LabVIEW for exploitation software, using CPLD as timing generation unit.Inserted computer 5 volume is little, there is independent full-order system, there are stronger execution and disposal ability, utilize inserted computer 5 to operate the friendly at interface and CPLD is easy to operate, time sequence precision is high, fireballing feature, produce the clock signal of characteristic frequency, and give level shifting circuit by this signal.The low current signal of control part is converted to the big current signal controlling bridge circuit driver circuit by level shifting circuit.The current signal of transmitting coil is converted to voltage signal ADC in capture card and emission current is acquired by Hall current sensor, the waveform situation of real-time monitored transient electromagnetic emission current in host computer LABVIEW interface, and the situation according to emission current waveform adjusts clamp voltage and build-out resistor makes the waveform of emission current reach the best, and the real time data acquisition storage that will collect, and the data of storage are real-time transmitted to data process and become figure, the real-time content obtaining subsurface material and distribution situation with image-forming module real time data；
First system boot initializes, then carries out corresponding parameter setting after starting, and selectes tranmitting frequency, arranges stacking fold, selectes preservation emission current wave path etc..Final system detects the state of current key value, performs corresponding operation.
Built-in lead-acid battery group 3 is made up of two pieces of lead-acid batteries.220V commercial power interface 1 gives the charging of built-in lead-acid battery group through lead-acid battery charger 2.
Signal-regulated kinase 17 be the signal that transmitting coil 16 is adopted through pre-amplification circuit 23, differential amplifier circuit 24, the last long-distance transmissions of V-I translation circuit 25 to the acquisition module 6 in all-in-one；Wherein,
Pre-amplification circuit 23 provides high input impedance, low noise, can carry out gain-adjusted according to the power receiving signal；
Common mode noise rejection is carried out by differential amplifier circuit 24, and provides certain additional gain when needed；
The output voltage signal of differential amplifier circuit is converted to current signal long-distance transmissions to acquisition module by V-I translation circuit 25, it is to avoid the distortion of signal.
Signal-regulated kinase power circuit 22 is the power supply produced required for Signal-regulated kinase of being powered by Li set of cells 20, and wherein, Li set of cells 20 is to be connect 220V commercial power interface by Li battery charger 19 to be charged；When Li set of cells 20 voltage is lower than certain value, low-voltage alarm circuit 21 is started working, and points out undertension, it is necessary to be charged.
The data that acquisition module 6 is uploaded to inserted computer 5 by data process and image-forming module 27 carry out data process, and real time data becomes figure, thus the real-time content obtaining subsurface material and distribution situation.
It is in an embodiment referring to Fig. 4, the circuit theory diagrams of transmitting bridge and its peripheral circuit, switch power module Us, it is provided that required electric energy；Fast recovery diode D5, after being connected with switch power module, one-way conduction, it is prevented that high voltage induction electromotive force damages power module；Transmitting bridge includes four IBGT modules (Q1, Q2, Q3 and Q4) by connecting the H bridge of transmitting coil composition after IBGT block coupled in series between two in the middle of the IBGT module of two groups of series connection, and wherein IBGT module Q1 and IBGT module Q2 connects, IBGT module Q3 and IBGT module Q4 connects.IBGT module has switching speed faster; and it is internal containing parasitic parallel diode (D1, D2, D3 and D4); both the effect of protection IGBT module can have been played; the higher reverse induction electromotive force preventing inductive load smashes IGBT module; the electricity simultaneously parasitic capacitance of IGBT module stored is released, it is prevented that the accumulation of electric capacity electricity burns out IGBT module.Transmitting coil be equivalent inductance L and equivalence resistance R series connection after be connected to two groups series connection IBGT modules in the middle of；
Damping coupling absorbing circuit, it is connected in parallel on transmitting coil two ends by after certain value damping coupling absorption resistance r0 and build-out resistor (r1 ... the rn) series connection organizing specific resistance more, the build-out resistor (r1 ... rn) of specific resistance switching switch (K1 ... Kn) in parallel, the build-out resistor value needed by switching switch to select；
Constant voltage clamp circuit, multiple Zener diodes (K01, K02 ... K0n) be connected in parallel on transmitting bridge module two ends, and select to regulate required clamp voltage by external knob after connecting.
After system electrification, drive circuit drives IBGT module Q1, Q3 turns on, Q2, Q4 ends, by the sense of current shown in circuit 1 in Fig. 4 in load, through after a period of time, IBGT module Q1, Q2, Q3, Q4 ends, in circuit, no current flows through, IBGT module Q2 is driven with back driving circuit, IBGT module Q4 turns on, IBGT module Q1, IBGT module Q3 ends, load is flow through the sense of current shown in circuit 2 in Fig. 4, four IBGT module Q1 subsequently, IBGT module Q2, IBGT module Q3, IBGT module Q4 ends again, in circuit, no current flows through again.
Damping coupling absorbing circuit is to be connected in parallel on transmitting coil two ends after being switched switch by the build-out resistor parallel connection of specific resistance, suitable build-out resistor value is selected by switching switch, coil load also exists comparatively significantly distribution capacity, the size of distribution capacity is directly proportional to the length of coil, therefore the existence of distribution capacity cannot be eliminated, existence due to distribution capacity, switching tube shutdown moment, turning off of emission current needs certain time delay, when only existing constant voltage clamp circuit, when not adding absorbing circuit, often there is reforming phenomena in the later stage of emission current shutoff waveform, and the concussion turning off waveform drastically influence receiver and receives the quality of data, for suppressing emission current to turn off the concussion in waveform later stage, must at coil two ends suitable absorption resistance in parallel, cut-off current just can be made to be in the underdamping state of critical damping or less, reach to close the effect having no progeny without concussion.
H bridge constant voltage clamp circuit and damping coupling absorbing circuit are combined, it is applied in varying environment to select suitable clamp voltage and suitable build-out resistor for different coils, shorten and know clearly the turn-off time, improve emission current waveform and turn off the linearity on edge, ensure that the positive and negative shutoff of emission current is along strict conformance, ensure to turn off later stage wave-like flat, shake without overshoot, nothing, reach to improve the purpose of waveform so that the accuracy that data extraction and transformation is explained is improved.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (6)
1. a Real-time Collection storage and data become the figure transient electromagnetic emitting-receiving system explained, it is characterised in that including:
Inserted computer, as man machine interface, by the various parameters of LabVIEW software design patterns transient electromagnetic emitting-receiving system, and the data that real-time storage gathers, and become figure by transient electromagnetic data with image-forming module real time data；
Acquisition module, for receiving the control signal of inserted computer after being connected with inserted computer by data/address bus, and the signal that emission current waveform and transient electromagnetic receiving subsystem are received is acquired；
Governor circuit, is connected with described acquisition module, controls described governor circuit by the Digital I/O of described acquisition module and produces the sequential that transient electromagnetic transmitting needs；
Synchronize change-over circuit, be connected with described governor circuit, for producing bridge control signal and the synchronizing signal of transient electromagnetic reception system；
Transmitting bridge, is connected by drive circuit and synchronizes change-over circuit, and bridge control signal exports described transmitting bridge through drive circuit；
Emission power module, is connected with transmitting bridge for providing required emitted energy for transmitting bridge；
Constant voltage clamp circuit, is connected in parallel on transmitting bridge two ends, and transmitting bridge is carried out constant voltage clamper；
Transmitting coil, after being connected with described transmitting bridge, produces emission current；
Damping coupling absorbing circuit, is connected with described transmitting coil, makes emission current waveform reach the best by described constant voltage clamp circuit and damping coupling absorbing circuit；
Hall current sensor, is converted to voltage signal by the current signal of transmitting coil and sends acquisition module to, and emission current waveform is acquired；
Receiving coil, receives inducted secondary field signal；
Signal-regulated kinase, after being connected with receiving coil, for being nursed one's health by the secondary field signal that receiving coil receives, sends conditioned signal to acquisition module, the secondary field signal received is acquired；
Described acquisition module upload the data to inserted computer and is overlapped showing to signal at LabVIEW software, the data that send to real-time for data are processed and image-forming module by inserted computer, real time data becomes figure, the real-time content obtaining subsurface material and distribution situation.
2. the transient electromagnetic emitting-receiving system that the Real-time Collection described in claim 1 stores and data one-tenth figure explains, it is characterised in that
Described acquisition module includes FPGA and AD converter, and FPGA is connected with Hall current sensor and Signal-regulated kinase through AD converter, gathers emission current waveform by Hall current sensor；The latched device of FPGA is connected with governor circuit, FPGA connects and composes through bus and inserted computer, host computer is configured being connected with acquisition module by bus to launching each parameter of reception, and governor circuit is configured by acquisition module by Digital I/O, makes governor circuit produce to launch sequential accordingly.
3. the transient electromagnetic emitting-receiving system that the Real-time Collection described in claim 1 stores and data one-tenth figure explains, it is characterized in that, described Signal-regulated kinase be signal that transmitting coil is adopted successively through pre-amplification circuit, differential amplifier circuit, the last long-distance transmissions of V-I translation circuit to acquisition module；Wherein,
Described pre-amplification circuit provides high input impedance, low noise and gain-adjusted；
Common mode noise rejection is carried out by described differential amplifier circuit, and provides certain additional gain when needed；
The output voltage signal of differential amplifier circuit is converted to current signal long-distance transmissions to acquisition module by described V-I translation circuit, it is to avoid the distortion of signal.
4. the transient electromagnetic emitting-receiving system that the Real-time Collection described in claim 1 stores and data one-tenth figure explains, it is characterized in that, governor circuit is using CPLD as timing generation unit, CPLD produces the clock signal of characteristic frequency, and give level shifting circuit by this signal, the low current signal of control part is converted to bigger current signal and controls bridge circuit driver circuit by level shifting circuit.
5. the transient electromagnetic emitting-receiving system that the Real-time Collection described in claim 1 stores and data one-tenth figure explains, it is characterized in that, described transmitting bridge module includes four IBGT modules by connecting the H bridge of transmitting coil composition after IBGT block coupled in series between two in the middle of two groups of IBGT modules.
6. the transient electromagnetic emitting-receiving system that the Real-time Collection described in claim 1 stores and data one-tenth figure explains, it is characterised in that
Damping coupling absorbing circuit is be connected in parallel on transmitting coil two ends after certain value damping coupling absorption resistance is connected with the build-out resistors organizing specific resistance more, switching switch in parallel in the build-out resistor in each specific resistance.
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| CN109061742A (en) * | 2018-08-29 | 2018-12-21 | 中国地质科学院地球物理地球化学勘查研究所 | A kind of aviation transient electromagnetic gain of received signal automatic control circuit |
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| CN113037067A (en) * | 2021-03-04 | 2021-06-25 | 云锡红河资源有限责任公司 | Matching resistance calculation method of RCD absorption loop and transient electromagnetic transmitter |
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