CN202798170U - Transient electromagnetic emission apparatus and transient electromagnetic emission system - Google Patents
Transient electromagnetic emission apparatus and transient electromagnetic emission system Download PDFInfo
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- CN202798170U CN202798170U CN2012203772240U CN201220377224U CN202798170U CN 202798170 U CN202798170 U CN 202798170U CN 2012203772240 U CN2012203772240 U CN 2012203772240U CN 201220377224 U CN201220377224 U CN 201220377224U CN 202798170 U CN202798170 U CN 202798170U
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Abstract
The utility model provides a transient electromagnetic emission apparatus and a transient electromagnetic emission system. The transient electromagnetic emission apparatus comprises a full-bridge switch circuit and an optical coupling isolation output circuit; the full-bridge switch circuit includes a sequence signal input terminal and a load access terminal; and the optical coupling isolation output circuit includes a controlled signal input terminal and a sequence signal output terminal. Besides, the sequence signal output terminal is connected with the sequence signal input terminal. According to the utility model, the transient electromagnetic emission apparatus and the transient electromagnetic emission system using the same have advantages of high transmitting power and high work stability. The transient electromagnetic emission apparatus is suitable for effective exploration of physical geography of an underground deep target body with the buried depth of more than 500 meters or for application to a complicated area with a severe interference.
Description
Technical field
The utility model relates to transient electromagnetic emitter and uses the transient electromagnetic emission system of this transient electromagnetic emitter.
Background technology
When carrying out the geology mineral exploration, usually use transient electromagnetic method that the investigation depth of mineral reserve is carried out prediction and calculation.Carrying out the investigation depth prediction and calculation often according to following formula:
Wherein: d is the mineral reserve degree of depth, and t is electromagnetism diffusion time, and σ is resistivity.By following formula as can be known, the diffusion depth of electromagnetism main with electromagnetism diffusion time and electric structure relevant.
The investigation and prospecting personnel often estimate according to following formula in real work:
The investigation depth formula of grounded source is:
Investigation depth formula in the Loop source:
In the formula, η is the minimum distinguishable voltage of instrument, and ρ is formation resistivity, and I is for sending electric current .AB for transmitting and receiving the loop line area.
The instrument that the tunnel transient electromagnetic method may visit of being used for according to above-mentioned theory design mainly contains Australia and produces the MSD-1 instrument that Terra TEM instrument and domestic Changsha white clouds instrument plant produce.The common feature of this two instrument is exactly at present:
1, emission receives all-in-one, and portable convenience is durable.
2, the simple and easy volume of operation is little, and the field work band is convenient.
3, a plurality of measuring frequencies are selected, and are convenient and practical.
Yet the transmitting power of existing instrument is little and depth of exploration is limited, and take the MSD-1 instrument as example: emission current: 1A～10A VTIC voltage: 12V～48V, investigation depth is generally 300 meters.Therefore how designing the transient electromagnetic emitter that a kind of transmitting power is large, depth of exploration is wide is the problem that industry is badly in need of solution.
The utility model content
The purpose of this utility model provides the transient electromagnetic emitter that a kind of transmitting power is large, depth of exploration is wide.Realize above-mentioned purpose, the utility model is mainly taked following technical scheme.
The utility model provides a kind of transient electromagnetic emitter, it comprises full bridge switching circuit and light-coupled isolation output circuit, described full bridge switching circuit includes clock signal input and load incoming end, described light-coupled isolation output circuit comprises controlled signal input and clock signal output, and described clock signal output is connected with the clock signal input.
Wherein: also comprise voltage protection circuit, described voltage protection circuit is connected with described full bridge switching circuit.
Described full bridge switching circuit comprises the first N-type field effect transistor, the second N-type field effect transistor, the 3rd N-type field effect transistor and the 4th N-type field effect transistor, and described clock signal input comprises first input end and the second input;
The grid of described the first N-type field effect transistor is connected with the grid of the 3rd N-type field effect transistor, the drain electrode of the first N-type field effect transistor is connected with the drain electrode of the second N-type field effect transistor, the source electrode of the 3rd N-type field effect transistor is connected with the source electrode of the 4th N-type field effect transistor, the source electrode of the first N-type field effect transistor is connected with the drain electrode of the 4th N-type field effect transistor, the source electrode of the second N-type field effect transistor is connected with the drain electrode of the 3rd N-type field effect transistor, and the grid of the second N-type field effect transistor is connected with the grid of the 4th N-type field effect transistor;
Described first input end is connected with the grid of described the first N-type field effect transistor, and described the second input is connected with described the 4th N-type fet gate;
Described load incoming end is arranged between the source electrode of the source electrode of described the first N-type field effect transistor and the second N-type field effect transistor.
Wherein: described light-coupled isolation output circuit comprises light-emitting diode, the first diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, a P type triode, the 2nd P type triode, the first default access voltage and the second default access voltage;
The anode of described light-emitting diode is connected with the first default access voltage, and the negative electrode of light-emitting diode is connected with described controlled signal input through described the first resistance;
The negative electrode of described the first diode is connected with the second default access voltage, the anode of the first diode is connected with the base stage of a described P type triode, the collector electrode of a described P type triode is connected through the base stage of the 3rd resistance with the 2nd P type triode, the grounded emitter of the one P type triode arranges described the second resistance between the collector electrode of the negative electrode of described the first diode and a P type triode;
The grounded emitter of described the 2nd P type three utmost points, the collector electrode of the 2nd P type triode is connected with the described second default access voltage through described the 4th resistance;
Described clock signal output is arranged on the tie point of the collector electrode of described the 2nd P type triode and described the 4th resistance.
The utility model also provides a kind of transient electromagnetic emission system, and it comprises transient electromagnetic signal main control computer and the transient electromagnetic emitter that is connected with described transient electromagnetic signal main control computer;
Described full bridge switching circuit and the light-coupled isolation output circuit of comprising of described transient electromagnetic emitter, described full bridge switching circuit includes clock signal input and load incoming end, described light-coupled isolation output circuit comprises controlled signal input and clock signal output, and described clock signal output is connected with the clock signal input;
Described transient electromagnetic signal main control computer comprises the timing control signal output, and described timing control signal output is connected with described controlled signal input.
Wherein: also comprise voltage protection circuit, described voltage protection circuit is connected with described full bridge switching circuit.
Wherein: described full bridge switching circuit comprises the first N-type field effect transistor, the second N-type field effect transistor, the 3rd N-type field effect transistor and the 4th N-type field effect transistor, and described clock signal input comprises first input end and the second input;
The grid of described the first N-type field effect transistor is connected with the grid of the 3rd N-type field effect transistor, the drain electrode of the first N-type field effect transistor is connected with the drain electrode of the second N-type field effect transistor, the source electrode of the 3rd N-type field effect transistor is connected with the source electrode of the 4th N-type field effect transistor, the source electrode of the first N-type field effect transistor is connected with the drain electrode of the 4th N-type field effect transistor, the source electrode of the second N-type field effect transistor is connected with the drain electrode of the 3rd N-type field effect transistor, and the grid of the second N-type field effect transistor is connected with the grid of the 4th N-type field effect transistor;
Described first input end is connected with the grid of described the first N-type field effect transistor, and described the second input is connected with described the 4th N-type fet gate;
Described load incoming end is arranged between the source electrode of the source electrode of described the first N-type field effect transistor and the second N-type field effect transistor.
Wherein: described light-coupled isolation output circuit comprises light-emitting diode, the first diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, a P type triode, the 2nd P type triode, the first default access voltage and the second default access voltage;
The anode of described light-emitting diode is connected with the first default access voltage, and the negative electrode of light-emitting diode is connected with described controlled signal input through described the first resistance;
The negative electrode of described the first diode is connected with the second default access voltage, the anode of the first diode is connected with the base stage of a described P type triode, the collector electrode of a described P type triode is connected through the base stage of the 3rd resistance with the 2nd P type triode, the grounded emitter of the one P type triode arranges described the second resistance between the collector electrode of the negative electrode of described the first diode and a P type triode;
The grounded emitter of described the 2nd P type three utmost points, the collector electrode of the 2nd P type triode is connected with the described second default access voltage through described the 4th resistance;
Described clock signal output is arranged on the tie point of the collector electrode of described the 2nd P type triode and described the 4th resistance.
Compared to prior art, transient electromagnetic emitter of the present utility model is connected with the light-coupled isolation output circuit by full bridge switching circuit is set, control the light-coupled isolation output circuit to the timing control signal of the larger voltage of full bridge switching circuit output by the timing control signal output output timing control signal of transient electromagnetic emission main frame, realize that by the output voltage of regulating the light-coupled isolation output circuit transmitting power of control transient electromagnetic emitter is with the electromagnetic emission of the relatively high power of realization transient electromagnetic emitter.
Therefore, transient electromagnetic emission harness of the present utility model has the large and high advantage of job stability of transmitting power.Use the transient electromagnetic emission system of this transient electromagnetic emission harness to have equally the large and high advantage of job stability of transmitting power.
Description of drawings
Fig. 1 is the transient electromagnetic processing unit circuit diagram of the utility model one preferred embodiment;
Fig. 2 is the circuit diagram of voltage protection circuit shown in Figure 1;
Fig. 3 is a kind of clock signal schematic diagram of the clock signal input input of full bridge switching circuit;
Fig. 4 is the another kind of clock signal schematic diagram of the clock signal input input of full bridge switching circuit;
Fig. 5 is the grid of the clock signal input of full bridge switching circuit this first N-type field effect transistor when alternately inputting Fig. 3 and clock signal shown in Figure 4 and the grid connecting line place output alternate positive and negative of the 3rd N-type field effect transistor, opposite polarity square-wave signal schematic diagram;
Fig. 6 is the structural representation of transient electromagnetic emission system of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the technical solution of the utility model is explained in detail.
See also Fig. 1 and Fig. 2, Fig. 1 is the transient electromagnetic emitter circuit diagram of the utility model one preferred embodiment.Fig. 2 is the circuit diagram of overvoltage crowbar 5 shown in Figure 1.
Transient electromagnetic emitter of the present utility model; it comprises full bridge switching circuit 1, light-coupled isolation output circuit 3 and voltage protection circuit 5; this full bridge switching circuit 1 includes clock signal input 11 and load incoming end 13; this light-coupled isolation output circuit 3 comprises controlled signal input 31 and clock signal output 33, and this clock signal output 33 is connected with clock signal input 11.
This full bridge switching circuit 1 comprises the first N-type field effect transistor 12, the second N-type field effect transistor 14, the 3rd N-type field effect transistor 16 and the 4th N-type field effect transistor 18, and this clock signal input comprises first input end 111 and the second input 113;
The grid of this first N-type field effect transistor 12 is connected with the grid of the 3rd N-type field effect transistor 16, the drain electrode of the first N-type field effect transistor 12 is connected with the drain electrode of the second N-type field effect transistor 14, the source electrode of the 3rd N-type field effect transistor 16 is connected with the source electrode of the 4th N-type field effect transistor 18, the source electrode of the first N-type field effect transistor 12 is connected with the drain electrode of the 4th N-type field effect transistor 18, the source electrode of the second N-type field effect transistor 14 is connected with the drain electrode of the 3rd N-type field effect transistor 16, and the grid of the second N-type field effect transistor 14 is connected with the grid of the 4th N-type field effect transistor 18;
This first input end 111 is connected with the grid of this first N-type field effect transistor 12, and this second input 113 is connected with the grid of the 4th N-type field effect transistor 18;
This load incoming end 13 is arranged between the source electrode of the source electrode of this first N-type field effect transistor 12 and the second N-type field effect transistor 14.
When the clock signal input 11 of this full bridge switching circuit 1 replaces the clock signal of inputting as shown in Figure 3 and Figure 4, the corresponding output with the grid connecting line place of the 3rd N-type field effect transistor 16 of the grid of this first N-type field effect transistor 12 alternate positive and negative, opposite polarity square-wave signal as shown in Figure 5.
This light-coupled isolation output circuit 3 comprises light-emitting diode D1, the first diode D2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, a P type triode Q1, the 2nd P type triode Q2, the first default access voltage V1 and the second default access voltage V2;
The anode of this light-emitting diode D1 is connected with the first default access voltage V1, and the negative electrode of light-emitting diode D1 is connected with this controlled signal input 31 through this first resistance R 1;
The negative electrode of this first diode D2 is connected with the second default access voltage V2, the anode of the first diode D2 is connected with the base stage of a P type triode Q1, the collector electrode of the one P type triode Q1 is connected through the base stage of the 3rd resistance R 3 with the 2nd P type triode Q2, the grounded emitter of the one P type triode Q1 arranges the second resistance R 2 between the collector electrode of the negative electrode of this first diode D2 and a P type triode Q1;
The grounded emitter of the 2nd P type triode Q2, the collector electrode of the 2nd P type triode Q2 is connected with this second default access voltage V2 through the 4th resistance R 4;
This clock signal output 33 is arranged on the connecting line of the collector electrode of the 2nd P type triode Q2 and the 4th resistance R 4.This clock signal output 33 is connected with this clock signal input 11.
This voltage protection circuit 5 is arranged on the source electrode connecting line of the source electrode of the 3rd N-type field effect transistor 16 and the 4th N-type field effect transistor 18; the out-of-work control voltage of this transient electromagnetic emitter is controlled in generation when being used for voltage when the source electrode of the 3rd N-type field effect transistor 16 and the source electrode junction of the 4th N-type field effect transistor 18 and surpassing the load voltage value of this transient electromagnetic emitter, so that this transient electromagnetic emitter is in safe work state.
In one embodiment, see also again Fig. 2.This voltage protection circuit 5 the 3rd diode D3, the 4th diode D4, the 5th resistance R 5, the 6th resistance R 6, slide-changing resistor R7, the 8th resistance R 8, the first capacitor C 1 and the second capacitor C 2 and integrated power amplifier Q3.
The 4th diode D4 is through the 3rd diode D3 ground connection, and the minus earth of the 3rd diode D3, the anode of the 4th utmost point diode D4 is connected with predeterminated voltage V2 through the 6th resistance R 6, the 5th resistance R 5 is set, this slide-changing resistor R7 the second end ground connection between the first end of the anode of the 4th diode D4 and this slide-changing resistor R7.This slide-changing resistor R7 sliding end is connected with the 2nd pin of this integrated power amplifier Q3; the 4th pin ground connection of this integrated power amplifier Q3; the 1st pin is connected with the output 53 of voltage protection circuit 5 and is used for to this transient electromagnetic emitter input control voltage; the 5th pin accesses this second predeterminated voltage; and be arranged in parallel this first capacitor C 1 and the second capacitor C 2 between the 5th pin and the ground connection; the 3rd pin is through the 8th resistance R 8 ground connection; on the 3rd pin and this eight resistance R, 8 connecting lines protective circuit voltage input end 51 is set, this voltage protection circuit 5 really input 51 is used for receiving the voltage at the source electrode connecting line place of the source electrode of the 3rd N-type field effect transistor 16 and the 4th N-type field effect transistor 18.
This shows that arranging of this voltage protection circuit 5 can protect this transient electromagnetic emitter to be operated in reliable operating state, improved functional reliability and the fail safe of this transient electromagnetic emitter.It should be noted that the first predeterminated voltage in the present embodiment can be set to 5V as required, this second predeterminated voltage is set to 12V, certainly also can be set to other magnitude of voltage particularly, and this place is not restricted.
The shell of transient electromagnetic emitter of the present utility model can be set to the flat-shaped rectangular box of aluminum casting, the lid that cooperates aluminium material, high-power ballistic device on the circuit board of this transient electromagnetic emitter can closely be attached on the wiring board by heat-conducting layer, and this wiring board can be fixed in the aluminium matter rectangular box to improve radiating efficiency.The size of this rectangular box specifically can be set to: 300 * 260 * 120mm, shell adopts sealed construction, is comprised of the thick 8mmDE of reaching flute profile aluminium casting.
In one embodiment, the emission maximum voltage of transient electromagnetic emitter of the present utility model is set to 400V, and the emission maximum electric current is set to 200A, and maximum transmission power is set to 5KW, therefore, can only there be a value to get maximum in lowest high-current value and the maximum voltage value.，
Compared to prior art, in the transient electromagnetic emitter of the present utility model, this full bridge switching circuit 1 is set is connected connection with the light-coupled isolation output circuit, control light-coupled isolation output circuit 3 to the timing control signal of the larger voltage of full bridge switching circuit 1 output by the timing control signal output output timing control signal of transient electromagnetic emission main frame, realize that by the output voltage of regulating light-coupled isolation output circuit 3 transmitting power of control transient electromagnetic emitter is with the electromagnetic emission of the relatively high power of realization transient electromagnetic emitter.Simultaneously, arranging of this voltage protection circuit 5 is set protects this transient electromagnetic emitter to be operated in reliable operating state, improved functional reliability and the fail safe of this transient electromagnetic emitter.
Therefore, transient electromagnetic emitter of the present utility model has the advantage of transmitting power height and good reliability.
This practicality also provides a kind of transient electromagnetic emission system, it comprises transient electromagnetic signal main control computer 100 and the above-mentioned transient electromagnetic emitter 200 that is connected with this transient electromagnetic signal main control computer, and respectively with this transient electromagnetic signal main control computer 100 be connected the antenna assembly 300 that transient electromagnetic emitter 200 is connected;
This transient electromagnetic signal main control computer comprises timing control signal output 101 and aerial signal receiving terminal 103, this timing control signal output 101 is connected with above-mentioned clock signal input (not sign), and this aerial signal receiving terminal 103 is connected with this antenna assembly 300 and is used for receiving this antenna assembly recovery signal.This antenna assembly 300 is connected with this transient electromagnetic emitter 200 and is used for transmission of electromagnetic signals.
Therefore, transient electromagnetic emission system of the present utility model has the advantage of transmitting power height and good reliability equally.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that implementation of the present utility model is only limited to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (8)
1. transient electromagnetic emitter, it is characterized in that: it comprises full bridge switching circuit and light-coupled isolation output circuit, described full bridge switching circuit includes clock signal input and load incoming end, described light-coupled isolation output circuit comprises controlled signal input and clock signal output, and described clock signal output is connected with the clock signal input.
2. described transient electromagnetic emitter according to claim 1, it is characterized in that: also comprise voltage protection circuit, described voltage protection circuit is connected with described full bridge switching circuit.
3. described transient electromagnetic emitter according to claim 1 is characterized in that:
Described full bridge switching circuit comprises the first N-type field effect transistor, the second N-type field effect transistor, the 3rd N-type field effect transistor and the 4th N-type field effect transistor, and described clock signal input comprises first input end and the second input;
The grid of described the first N-type field effect transistor is connected with the grid of the 3rd N-type field effect transistor, the drain electrode of the first N-type field effect transistor is connected with the drain electrode of the second N-type field effect transistor, the source electrode of the 3rd N-type field effect transistor is connected with the source electrode of the 4th N-type field effect transistor, the source electrode of the first N-type field effect transistor is connected with the drain electrode of the 4th N-type field effect transistor, the source electrode of the second N-type field effect transistor is connected with the drain electrode of the 3rd N-type field effect transistor, and the grid of the second N-type field effect transistor is connected with the grid of the 4th N-type field effect transistor;
Described first input end is connected with the grid of described the first N-type field effect transistor, and described the second input is connected with described the 4th N-type fet gate;
Described load incoming end is arranged between the source electrode of the source electrode of described the first N-type field effect transistor and the second N-type field effect transistor.
4. it is characterized in that according to claim 1 or 3 described transient electromagnetic emitters: described light-coupled isolation output circuit comprises light-emitting diode, the first diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, a P type triode, the 2nd P type triode, the first default access voltage and the second default access voltage;
The anode of described light-emitting diode is connected with the first default access voltage, and the negative electrode of light-emitting diode is connected with described controlled signal input through described the first resistance;
The negative electrode of described the first diode is connected with the second default access voltage, the anode of the first diode is connected with the base stage of a described P type triode, the collector electrode of a described P type triode is connected through the base stage of the 3rd resistance with the 2nd P type triode, the grounded emitter of the one P type triode arranges described the second resistance between the collector electrode of the negative electrode of described the first diode and a P type triode;
The grounded emitter of described the 2nd P type three utmost points, the collector electrode of the 2nd P type triode is connected with the described second default access voltage through described the 4th resistance;
Described clock signal output is arranged on the tie point of the collector electrode of described the 2nd P type triode and described the 4th resistance.
5. a transient electromagnetic emission system is characterized in that, it comprises transient electromagnetic signal main control computer and the transient electromagnetic emitter that is connected with described transient electromagnetic signal main control computer;
Described full bridge switching circuit and the light-coupled isolation output circuit of comprising of described transient electromagnetic emitter, described full bridge switching circuit includes clock signal input and load incoming end, described light-coupled isolation output circuit comprises controlled signal input and clock signal output, and described clock signal output is connected with the clock signal input;
Described transient electromagnetic signal main control computer comprises the timing control signal output, and described timing control signal output is connected with described controlled signal input.
6. described transient electromagnetic emission system according to claim 5, it is characterized in that: also comprise voltage protection circuit, described voltage protection circuit is connected with described full bridge switching circuit.
7. described transient electromagnetic emission system according to claim 5 is characterized in that:
Described full bridge switching circuit comprises the first N-type field effect transistor, the second N-type field effect transistor, the 3rd N-type field effect transistor and the 4th N-type field effect transistor, and described clock signal input comprises first input end and the second input;
The grid of described the first N-type field effect transistor is connected with the grid of the 3rd N-type field effect transistor, the drain electrode of the first N-type field effect transistor is connected with the drain electrode of the second N-type field effect transistor, the source electrode of the 3rd N-type field effect transistor is connected with the source electrode of the 4th N-type field effect transistor, the source electrode of the first N-type field effect transistor is connected with the drain electrode of the 4th N-type field effect transistor, the source electrode of the second N-type field effect transistor is connected with the drain electrode of the 3rd N-type field effect transistor, and the grid of the second N-type field effect transistor is connected with the grid of the 4th N-type field effect transistor;
Described first input end is connected with the grid of described the first N-type field effect transistor, and described the second input is connected with described the 4th N-type fet gate;
Described load incoming end is arranged between the source electrode of the source electrode of described the first N-type field effect transistor and the second N-type field effect transistor.
8. it is characterized in that according to claim 5 or 7 described transient electromagnetic emission systems: described light-coupled isolation output circuit comprises light-emitting diode, the first diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, a P type triode, the 2nd P type triode, the first default access voltage and the second default access voltage;
The anode of described light-emitting diode is connected with the first default access voltage, and the negative electrode of light-emitting diode is connected with described controlled signal input through described the first resistance;
The negative electrode of described the first diode is connected with the second default access voltage, the anode of the first diode is connected with the base stage of a described P type triode, the collector electrode of a described P type triode is connected through the base stage of the 3rd resistance with the 2nd P type triode, the grounded emitter of the one P type triode arranges described the second resistance between the collector electrode of the negative electrode of described the first diode and a P type triode;
The grounded emitter of described the 2nd P type three utmost points, the collector electrode of the 2nd P type triode is connected with the described second default access voltage through described the 4th resistance;
Described clock signal output is arranged on the tie point of the collector electrode of described the 2nd P type triode and described the 4th resistance.
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| CN2012203772240U CN202798170U (en) | 2012-07-31 | 2012-07-31 | Transient electromagnetic emission apparatus and transient electromagnetic emission system |
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| CN2012203772240U CN202798170U (en) | 2012-07-31 | 2012-07-31 | Transient electromagnetic emission apparatus and transient electromagnetic emission system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454692A (en) * | 2013-09-05 | 2013-12-18 | 中煤科工集团西安研究院 | Intrinsic safety type transient electromagnetic instrument host for mines |
| CN105911597A (en) * | 2016-04-11 | 2016-08-31 | 中国科学院地质与地球物理研究所 | Distributed type electromagnetic transmitter system and control method therefor |
| CN109695446A (en) * | 2019-01-04 | 2019-04-30 | 电子科技大学 | A kind of induction log tool transmission power adaptation adjustment device |
| CN109695447A (en) * | 2019-01-04 | 2019-04-30 | 电子科技大学 | A kind of induction log tool transmission power adaptation method of adjustment |
| CN111313916A (en) * | 2020-03-31 | 2020-06-19 | 湖南科技大学 | Signal transmitting device and method for reducing transient electromagnetic turn-off time |
-
2012
- 2012-07-31 CN CN2012203772240U patent/CN202798170U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454692A (en) * | 2013-09-05 | 2013-12-18 | 中煤科工集团西安研究院 | Intrinsic safety type transient electromagnetic instrument host for mines |
| CN105911597A (en) * | 2016-04-11 | 2016-08-31 | 中国科学院地质与地球物理研究所 | Distributed type electromagnetic transmitter system and control method therefor |
| CN105911597B (en) * | 2016-04-11 | 2017-01-11 | 中国科学院地质与地球物理研究所 | Distributed type electromagnetic transmitter system and control method therefor |
| CN109695446A (en) * | 2019-01-04 | 2019-04-30 | 电子科技大学 | A kind of induction log tool transmission power adaptation adjustment device |
| CN109695447A (en) * | 2019-01-04 | 2019-04-30 | 电子科技大学 | A kind of induction log tool transmission power adaptation method of adjustment |
| CN111313916A (en) * | 2020-03-31 | 2020-06-19 | 湖南科技大学 | Signal transmitting device and method for reducing transient electromagnetic turn-off time |
| CN111313916B (en) * | 2020-03-31 | 2024-03-08 | 湖南科技大学 | Signal transmitting device and method for reducing transient electromagnetic turn-off time |
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