CN108019199B - Transmitting circuit for array induction - Google Patents
Transmitting circuit for array induction Download PDFInfo
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- CN108019199B CN108019199B CN201610928192.1A CN201610928192A CN108019199B CN 108019199 B CN108019199 B CN 108019199B CN 201610928192 A CN201610928192 A CN 201610928192A CN 108019199 B CN108019199 B CN 108019199B
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- 230000006698 induction Effects 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims abstract description 154
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000003321 amplification Effects 0.000 description 8
- 238000003199 nucleic acid amplification method Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a transmitting circuit for array induction, which comprises a transmitting driving circuit module, a resonant capacitor array module, a transmitting module and a control circuit module, wherein the control circuit module comprises a signal transmitting device for generating signals with different frequencies and a capacitor control device for controlling the arrangement of the capacitor array module; the transmitting driving circuit module is used for amplifying the signal generated by the signal transmitting device to a desired power range and transmitting the amplified power signal to the resonant capacitor array module; the resonant capacitor array module receives the power signal transmitted by the transmitting driving circuit module and is connected with the transmitting module to form a resonant loop. According to the invention, different capacitors are switched for signals with different frequencies by the capacitor control device to be connected with the transmitting module, so that the purpose of selecting the signal frequency can be achieved, each signal frequency component has larger transmitting energy, and the signal-to-noise ratio of the instrument can be greatly improved.
Description
Technical Field
The present invention relates to a signal processing circuit, and more particularly, to a transmitting circuit for array sensing.
Background
The array induction logging system is composed of several simple double-line systems, and it adopts a series of coil systems with different coil distances to measure the same stratum so as to obtain parameters of original stratum and invasive zone resistivity. The array induction well logging adopts advanced methods such as advanced electronic and computer technology, digital processing and the like, a large amount of collected data is sent to the ground through a multi-channel telemetry nipple, and then the data is processed through a computer, so that curves with different detection depths and different longitudinal resolutions are obtained. In addition to the capability of obtaining the resistivity of the undisturbed stratum and the invasive zone, the array induction logging can also study the change of the invasive zone, determine the range of the transition zone, and perform two-dimensional resistivity radial imaging and invasive profile radial imaging according to the obtained basic data.
At present, the traditional transmitting circuit generally adopts the following 3 schemes: 1. outputting a multi-frequency sine wave superposition; a single frequency sine wave output; 3. the multi-frequency sine waves are output according to approximate square waves after being overlapped. The multi-frequency sine wave superposition adopted in the scheme 1 is easy to cause reactive power loss of a transmitting circuit, so that a transmitting power device generates heat seriously, a circuit is unstable and the high-temperature performance is poor (the high-temperature finger of petroleum logging is more than 175 ℃), in order to reduce the transmitting loss, the transmitting power can only be reduced, the signal-to-noise ratio and the response dynamic range of an instrument are reduced, and finally the measuring precision of the instrument is reduced and the dynamic range is reduced. Although the single frequency sine wave in scheme 2 solves the above problem, the single frequency cannot guarantee the accuracy of measurement purely according to a simple theoretical model on the basis of the attachment correction. In scheme 3, although the defects of schemes 1 and 2 are avoided, the difficulty of circuit debugging is increased, the weight of the internal frequency determines that the scheme still has too small transmitting power of some frequencies, the signal-to-noise ratio of the received signals of the frequencies is reduced, and finally the precision and the dynamic range of the instrument are affected.
The application number 201420737849.2 discloses a multifrequency resonance transmitting circuit for array induction logging instrument, including the mixed signal generation module that connects gradually, mixed signal filtering module, power amplification module, passive resonance module, transmitting module, mixed signal generation module is used for producing mixed signal, power amplification module outputs the mixed signal power after amplifying passive resonance module for, passive resonance module carries out impedance match to power amplification module and transmitting module, power amplification module still includes operational amplifier, the feedback resistance who connects in parallel with operational amplifier, its characterized in that: the power amplification module further comprises a full-bridge topology amplification circuit connected with the signal output end of the operational amplifier, the number of the operational amplifiers is two, the two operational amplifiers are connected in parallel, the full-bridge topology amplification circuit comprises triodes connected in series and/or in parallel, the mixed signals are amplified to become differential control signals through the operational amplifiers and feedback resistor voltage values, and the differential control signals are amplified by the full-bridge topology amplification circuit for the second time; the passive resonance module comprises a capacitor and an inductor connected with the capacitor. The invention adopts the Foster integrated resonance module, and the frequency of the three resonance points and the voltage amplitude of each resonance point can be adjusted by changing the parameters of the passive resonance module, so that the debugging difficulty of the circuit can be reduced, and the problems of lower signal-to-noise ratio and the like still exist.
Disclosure of Invention
The invention provides a transmitting circuit for array induction, which aims to solve the problems of low signal-to-noise ratio and the like of instrument measurement in the prior art, and can effectively improve the signal-to-noise ratio of instrument measurement, expand the dynamic range of instrument measurement and enhance the repeatability and consistency of instruments.
The invention provides a transmitting circuit for array induction, which comprises a transmitting driving circuit module, a resonant capacitor array module, a transmitting module and a control circuit module; the control circuit module comprises a signal transmitting device for generating signals with different frequencies and a capacitance control device for controlling the arrangement of the capacitance array module; the transmitting driving circuit module is used for amplifying the signal generated by the signal transmitting device to a desired power range and transmitting the amplified power signal to the resonant capacitor array module; the resonant capacitor array module receives the power signal transmitted by the transmitting driving circuit module and is connected with the transmitting module to form a resonant loop.
In the transmitting circuit for array induction, the resonant capacitor array module is preferably composed of at least two different capacitors, and each capacitor is independently connected with the transmitting module.
According to the transmitting circuit for array induction, as an optimal mode, the capacitance control device switches corresponding capacitances to be connected with the transmitting module according to different frequencies of signals transmitted to the resonant capacitance array module by the transmitting driving circuit module. The capacitance control device in the control circuit module is connected with the transmitting module by switching different capacitance arrays according to signals with different frequencies, so that the purpose of selecting signal frequencies can be achieved, each signal frequency component has larger transmitting energy, and the signal-to-noise ratio of the instrument can be greatly improved.
In the transmitting circuit for array induction, the transmitting module is wound on the coil framework by at least two strands of twisted wires as a preferable mode. The different inductance L can be obtained by using different coil turns and coil sectional areas through the transmitting module, and then different capacitors are connected with the transmitting module in a time-sharing way under the program control of the capacitor control device, so that the required frequency can be transmitted.
In an embodiment of the transmitting circuit for array sensing, the resonant capacitor array module includes a multiplexer, and a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor connected to the multiplexer and arranged in parallel.
The invention relates to a transmitting circuit for array sensing, and in a preferred mode, the control circuit comprises a first operational amplifier, a second operational amplifier, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a first triode, a second triode, a third triode, a fourth triode, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a sixteenth resistor; the input signal is connected with the fifth capacitor and the sixth capacitor, the positive input end of the first operational amplifier is connected with the fifth capacitor, the positive input end of the first operational amplifier is grounded through the third resistor, the reverse input end of the first operational amplifier is grounded through the first resistor, the reverse input end of the first operational amplifier is grounded through the ninth capacitor, the reverse input end of the first operational amplifier is connected with the output signal through the tenth resistor, the reverse input end of the first operational amplifier is connected with the output signal through the eleventh capacitor, the reverse input end of the first operational amplifier is connected with the fifth resistor, the seventh resistor, the collector of the first triode is connected with the negative electrode of the third diode, the output end of the first operational amplifier is connected with the fifth resistor and the sixth resistor, the emitter of the first triode is connected with the emitter of the second triode, the ninth resistor, the negative electrode of the fourth diode, the fifth resistor, the seventh resistor and the output signal of the seventh triode are connected with the base of the seventh resistor and the eighth resistor, the positive electrode of the eighth diode is connected with the negative electrode of the eighth resistor, the eighth resistor is connected with the positive electrode of the eighth resistor, the negative electrode of the eighth resistor is connected with the eighth resistor, the eighth resistor is connected with the positive electrode of the eighth resistor is connected with the eighth resistor, the negative electrode of the third diode is connected with a ninth capacitor, an eleventh capacitor, a first resistor, a fifth resistor, a seventh resistor, a tenth resistor and the reverse input end of the first operational amplifier, the positive electrode of the fourth diode is connected with the negative electrode of a power supply, the negative electrode of the fourth diode is connected with the emitter of the first triode, the ninth resistor, the emitter of the second triode, the positive electrode of the third diode, the fifth resistor, the seventh resistor, the collector of the first third and the output signal, and the eighth capacitor is connected with the seventh capacitor and the ninth resistor; the positive input end of the second operational amplifier is grounded through a fourth resistor, the positive input end of the second operational amplifier is connected with a sixth capacitor, a twelfth capacitor and an eleventh resistor, the reverse input end of the second operational amplifier is grounded through the second resistor, the output end of the second operational amplifier is connected with the twelfth resistor and the thirteenth resistor, the collector of the third triode is connected with the sixteenth resistor and the cathode of the seventh diode through a sixteenth capacitor, the emitter of the third triode is connected with the emitter of the fourth triode, the base of the third triode is connected with the sixteenth resistor and the anode of the fifth diode, the collector of the fourth triode is connected with the fourteenth resistor and the fourteenth capacitor, the emitter of the fourth triode is connected with the emitter of the third triode, the base of the fourth triode is connected with the fourteenth resistor and the anode of the sixth diode, the positive electrode of the fifth diode is connected with the sixteenth resistor and the base electrode of the third triode, the negative electrode of the fifth diode is grounded through a thirteenth capacitor, the negative electrode of the fifth diode is connected with the eleventh resistor, the twelfth resistor, the thirteenth resistor, the twelfth capacitor, the thirteenth capacitor, the negative electrode of the sixth diode, the positive electrode of the seventh diode, the negative electrode of the eighth diode and the output signal, the positive electrode of the sixth diode is connected with the fourteenth resistor and the base electrode of the fourth triode, the negative electrode of the sixth diode is connected with the eleventh resistor, the twelfth resistor, the thirteenth capacitor, the twelfth capacitor, the thirteenth capacitor, the negative electrode of the fifth diode, the positive electrode of the seventh diode, the negative electrode of the eighth diode and the output signal, the positive electrode of the seventh diode is connected with the eleventh resistor, the twelfth resistor, the thirteenth resistor, the twelfth capacitor, the negative electrode of the thirteenth capacitor, the negative electrode of the fifth diode, the negative electrode of the sixth diode, the negative electrode of the eighth diode are connected with the output signal, the negative electrode of the seventh diode is connected with the sixteenth resistor, the sixteenth capacitor and the collector of the third triode, the positive electrode of the eighth diode is grounded through the seventeenth capacitor, the negative electrode of the eighth diode is connected with the eleventh resistor, the twelfth resistor, the thirteenth resistor, the twelfth capacitor, the thirteenth capacitor, the negative electrode of the fifth diode, the negative electrode of the sixth diode, the positive electrode of the seventh diode and the output signal, and the fifteenth capacitor is connected with the fifteenth resistor and the fourteenth capacitor.
In the using process, a signal transmitting device in a control circuit module sends an initial signal and transmits the initial signal to a transmitting driving circuit module, the transmitting driving circuit module amplifies the signal to a desired power range and transmits the amplified signal to a resonant capacitor array module, and a capacitor control device in the control circuit module switches different capacitors in the resonant capacitor array module according to signals with different frequencies, and the switched capacitors are connected with the transmitting module and transmit the signals.
The invention divides the resonant capacitor array module into at least two capacitors, each capacitor is separately connected with the transmitting module, and the different capacitors are switched to be connected with the transmitting module by the capacitor control device aiming at signals with different frequencies, so that the purpose of selecting signal frequencies can be achieved, each signal frequency component has larger transmitting energy, and the signal to noise ratio of the instrument can be greatly improved.
Drawings
FIG. 1 is a schematic diagram of an inductive transmit circuit for an array;
FIG. 2 is a circuit diagram of a capacitive array module for an array inductive transmit circuit;
fig. 3 is a circuit diagram of a control circuit for an array induction transmitter circuit.
Description of the drawings: u1, a multiplexer; l: an inductance; c1, a first capacitor; c2, a second capacitor; and C3: a third capacitor; cn: a fourth capacitor; u1: 1. a first operational amplifier; U1B, a second operational amplifier; d1, a first diode; d2, a second diode; d3, a third diode; d4, a fourth diode; d5, a fifth diode; d6, a sixth diode; d7, a seventh diode; d8, an eighth diode; q1, a first triode; q2, a second triode; q3, a third triode; q4, a fourth triode; c5, a fifth capacitor; c6, a sixth capacitor; c8, a seventh capacitor; c10, eighth capacitance; c11, a ninth capacitor; c12, tenth capacitance; c13, eleventh capacitance; c15, a twelfth capacitor; c16, thirteenth capacitance; c17, fourteenth capacitance; c18, fifteenth capacitance; c19, sixteenth capacitance; c20, seventeenth capacitance; r1, a first resistor; r2, a second resistor; r3, a third resistor; r4, a fourth resistor; r5, a fifth resistor; r6, a sixth resistor; r7, a seventh resistor; r8, eighth resistor; r9, ninth resistor; r10, tenth resistor; r11, eleventh resistor; r12, twelfth resistor; r13, thirteenth resistance; r14, fourteenth resistor; r15, fifteenth resistor; r16, sixteenth resistance.
Detailed Description
Example 1
As shown in fig. 1 to 3, the present invention provides a transmitting circuit for array induction, which comprises a transmitting driving circuit module, a resonant capacitor array module, a transmitting module and a control circuit module, wherein the control circuit module comprises a signal transmitting device for generating signals with different frequencies and a capacitor control device for controlling the arrangement of the capacitor array module; the transmitting driving circuit module is used for amplifying the signal generated by the signal transmitting device to a desired power range and transmitting the amplified power signal to the resonant capacitor array module; the resonant capacitor array module is used for receiving power signals transmitted by the transmission driving circuit module and is connected with the transmission module to form a resonant circuit, the resonant capacitor array module comprises a multiplexer U1, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fourth capacitor Cn, which are connected with the multiplexer U1 and are arranged in parallel, the inductor L and different capacitors form an LC oscillating circuit to form different oscillating frequencies, and a capacitance control device in the control circuit module controls different capacitors to be connected with the transmission module independently according to different signal frequencies amplified by the transmission driving module.
The control circuit includes a first operational amplifier U1: 1. the second operational amplifier U1B, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5, the sixth diode D6, the seventh diode D7, the eighth diode D8, the first triode Q1, the second triode Q2, the third triode Q3, the fourth triode Q4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C8, the eighth capacitor C10, the ninth capacitor C11, the tenth capacitor C12, the eleventh capacitor C13, the twelfth capacitor C15, the thirteenth capacitor C16, the fourteenth capacitor C17, the fifteenth capacitor C18, the sixteenth capacitor C19, the seventeenth capacitor C20, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R16, and the thirteenth resistor R13; the input signal is connected to the fifth capacitor C5 and the sixth capacitor C6, and the first operational amplifier U1: the positive input terminal of 1 is connected with a fifth capacitor C5, and the first operational amplifier U1: the positive input terminal of 1 is grounded through a third resistor R3, and the first operational amplifier U1: the inverting input terminal of 1 is grounded through a first resistor R1, and the first operational amplifier U1: the inverting input terminal of 1 is grounded through a ninth capacitor C11, and the first operational amplifier U1: the inverting input terminal of 1 is connected with the output signal through a tenth resistor R10, and the first operational amplifier U1: the inverting input terminal of 1 is connected with the output signal through a seventh capacitor C8, and the first operational amplifier U1: the reverse input end of the first operational amplifier U1 is connected with a fifth resistor R5, a seventh resistor R7, a collector electrode of the first triode Q1 and a cathode electrode of the third diode D2: the output end of the first transistor Q1 is connected with a fifth resistor R5 and a sixth resistor R6, the emitter of the first transistor Q1 is connected with the emitter of the second transistor Q2, a ninth resistor R9, the positive electrode of a third diode D3, the negative electrode of a fourth diode D4, the fifth resistor R5, a seventh resistor R7, the collector of the first transistor Q1 and an output signal, the base of the first transistor Q1 is connected with the seventh resistor R7 and the positive electrode of the first diode D1, the collector of the second transistor Q2 is grounded through a seventh capacitor C8, the collector of the second transistor Q2 is connected with an eighth resistor R8, the emitter of the second transistor Q2 is connected with the emitter of the first transistor Q1, the ninth resistor R9, the positive electrode of the third diode D3, the negative electrode of the fourth diode D4, the fifth resistor R5, the seventh resistor R7, the collector of the first transistor Q1 and the output signal, the cathode of the first diode D1 is grounded through a tenth capacitor C12, the cathode of the first diode D1 is connected with the anode of a sixth resistor R6 and a second diode D2, the cathode of the second diode D2 is connected with an eighth resistor R8 and the base of a second triode Q2, the anode of the third diode Q3 is connected with the emitter of the first triode Q1, a ninth resistor R9, the emitter of the second triode Q2, the cathode of a fourth diode D4, a fifth resistor R5, a seventh resistor R7, the collector of the first triode Q1 and an output signal, and the cathode of the third diode D3 is connected with a ninth capacitor C11, an eleventh capacitor C13, the first resistor R1, a fifth resistor R5, a seventh resistor R7, a tenth resistor R10 and a first operational amplifier U1: the reverse input end of the first transistor Q1 is connected with the positive electrode of the fourth diode D4, the negative electrode of the fourth diode D4 is connected with the emitter of the first transistor Q1, the ninth resistor R9, the emitter of the second transistor Q2, the positive electrode of the third diode D3, the fifth resistor R5, the seventh resistor R7, the collector of the first transistor Q1 and the output signal, and the eighth capacitor C10 is connected with the seventh capacitor C8 and the ninth resistor R9; the second operational amplifier U2: the positive input terminal of 1 is grounded through a fourth resistor R4, and the second operational amplifier U2: the positive input terminal of 1 is connected with a sixth capacitor C6, a twelfth capacitor C15 and an eleventh resistor R11, and the second operational amplifier U2: the inverting input terminal of 1 is grounded through a second resistor R2, and the second operational amplifier U2: the output end of the third transistor Q3 is connected with a sixteenth resistor R12 and a thirteenth resistor R13, the collector of the third transistor Q3 is connected with the sixteenth resistor R16 and the cathode of a seventh diode D7 through a sixteenth capacitor C19, the emitter of the third transistor Q3 is connected with the emitter of a fourth transistor Q4, the base of the third transistor Q3 is connected with the sixteenth resistor R16 and the anode of a fifth diode D5, the collector of the fourth transistor Q4 is connected with a fourteenth resistor R14 and a fourteenth capacitor C17, the emitter of the fourth transistor Q4 is connected with the emitter of the third transistor Q3, the base of the fourth transistor Q4 is connected with the fourteenth resistor R14 and the anode of a sixth diode D6, the anode of the fifth diode D5 is connected with the base of the sixteenth resistor R16 and the third transistor Q3, the cathode of the fifth diode D5 is grounded through a thirteenth capacitor C16, the cathode of the fifth diode D5 is connected with the eleventh resistor R11, the twelfth resistor R12, the eighth capacitor C15, the thirteenth resistor R13, the twelfth capacitor C15, the cathode of the sixth diode D6, the anode of the seventh diode D7, the cathode of the eighth diode D8 and the output signal, the anode of the sixth diode D6 is connected with the base of the fourteenth resistor R14 and the fourth triode D4, the cathode of the sixth diode D6 is connected with the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the twelfth capacitor C15, the thirteenth capacitor C16, the cathode of the fifth diode D5, the anode of the seventh diode D7, the cathode of the eighth diode D8 and the output signal, the anode of the seventh diode D7 is connected with the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the twelfth capacitor C15, the thirteenth capacitor C16, the cathode of the fifth diode D5, the cathode of the sixth diode D6, the cathode of the eighth diode D8 is connected with the output signal, the cathode of the seventh diode D7 is connected with the sixteenth resistor R16, the sixteenth capacitor C19 and the collector of the third triode Q3, the anode of the eighth diode D8 is grounded through the seventeenth capacitor C20, the cathode of the eighth diode D8 is connected with the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the twelfth capacitor C15, the thirteenth capacitor C16, the cathode of the fifth diode D5, the cathode of the sixth diode D6, the anode of the seventh diode D7 and the output signal, and the fifteenth capacitor C18 is connected with the fifteenth resistor R15 and the fourteenth capacitor C17.
In the using process, a signal transmitting device in a control circuit module sends an initial signal and transmits the initial signal to a transmitting driving circuit module, the transmitting driving circuit module amplifies the signal to a desired power range and transmits the amplified signal to a resonant capacitor array module, and a capacitor control device in the control circuit module switches different capacitors in the resonant capacitor array module according to signals with different frequencies, and the switched capacitors are connected with the transmitting module and transmit the signals.
The invention can improve the signal to noise ratio by 10% -20%, which is very critical to improve the accurate response to the stratum when the effective signal is weak, especially when the stratum resistivity is higher than 300 Ω·m.
The foregoing description is intended to be illustrative only and not limiting, and it will be understood by those of ordinary skill in the art that any modifications, variations or equivalent may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. A transmitting circuit for array induction, includes transmission drive circuit module, resonance capacitor array module, transmitting module and control circuit module, its characterized in that: the control circuit module comprises a signal transmitting device for generating signals with different frequencies and a capacitance control device for controlling the arrangement of the resonant capacitance array module; the transmitting driving circuit module is used for amplifying the signal generated by the signal transmitting device to a desired power range and transmitting the amplified power signal to the resonant capacitor array module; the resonant capacitor array module is used for receiving the power signal transmitted by the transmitting driving circuit module and is connected with the transmitting module to form a resonant loop; the resonant capacitor array module consists of at least two different capacitors, and each capacitor is independently connected with the transmitting module; the capacitance control device switches the corresponding capacitance to be connected with the transmitting module according to different signal frequencies transmitted to the resonant capacitance array module by the transmitting driving circuit module; the transmitting module is wound on the coil framework by at least two strands of twisted wires; the resonant capacitor array module comprises a multiplexer (U1) and a first capacitor (C1), a second capacitor (C2), a third capacitor (C3) and a fourth capacitor (Cn) which are connected with the multiplexer (U1), wherein the first capacitor (C1), the second capacitor (C2), the third capacitor (C3) and the fourth capacitor (Cn) are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610928192.1A CN108019199B (en) | 2016-10-31 | 2016-10-31 | Transmitting circuit for array induction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610928192.1A CN108019199B (en) | 2016-10-31 | 2016-10-31 | Transmitting circuit for array induction |
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| CN108019199A CN108019199A (en) | 2018-05-11 |
| CN108019199B true CN108019199B (en) | 2023-09-05 |
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| CN201610928192.1A Active CN108019199B (en) | 2016-10-31 | 2016-10-31 | Transmitting circuit for array induction |
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| CN109120301A (en) * | 2018-07-13 | 2019-01-01 | 安凯(广州)微电子技术有限公司 | A kind of tuner and method of transmitting and reception community network |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203503139U (en) * | 2013-09-13 | 2014-03-26 | 天津市畅悦电子科技有限公司 | Transmitting terminal circuit adopted in temperature control system |
| CN104060986A (en) * | 2014-06-13 | 2014-09-24 | 中国科学院电工研究所 | Multi-frequency array electrical logging resonant launching system |
| CN104074515A (en) * | 2014-07-18 | 2014-10-01 | 北京中石曙光科技有限公司 | Microresistivity scanning imaging logging device and radiating circuit thereof |
| CN204258785U (en) * | 2014-11-28 | 2015-04-08 | 杭州丰禾石油科技有限公司 | A kind of multifrequency resonance transmission circuit for array induction logging tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040127185A1 (en) * | 2002-12-23 | 2004-07-01 | Abrahams Richard L. | Harmonic suppression for a multi-band transmitter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203503139U (en) * | 2013-09-13 | 2014-03-26 | 天津市畅悦电子科技有限公司 | Transmitting terminal circuit adopted in temperature control system |
| CN104060986A (en) * | 2014-06-13 | 2014-09-24 | 中国科学院电工研究所 | Multi-frequency array electrical logging resonant launching system |
| CN104074515A (en) * | 2014-07-18 | 2014-10-01 | 北京中石曙光科技有限公司 | Microresistivity scanning imaging logging device and radiating circuit thereof |
| CN204258785U (en) * | 2014-11-28 | 2015-04-08 | 杭州丰禾石油科技有限公司 | A kind of multifrequency resonance transmission circuit for array induction logging tool |
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