CN205117337U - Multi -frequency resonance circuit - Google Patents
Multi -frequency resonance circuit Download PDFInfo
- Publication number
- CN205117337U CN205117337U CN201520852321.4U CN201520852321U CN205117337U CN 205117337 U CN205117337 U CN 205117337U CN 201520852321 U CN201520852321 U CN 201520852321U CN 205117337 U CN205117337 U CN 205117337U
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- frequency
- resonance circuit
- circuit
- electric capacity
- inductance
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Abstract
The utility model discloses a multi -frequency resonance circuit belongs to oil, the natural gas, drilling operation measurement while drilling field, including first inductance, first electric capacity and second electric capacity, first inductance and second electric capacity are established ties, again with electromagnetic wave resistivity instrument on transmitting coil or receiving coil establish ties, its both ends are connected to the power, first electric capacity is parallelly connected with first inductance. This circuit has possessed the possibility that a plurality of frequency points can both resonance enlarge, as long as according to the frequency relation of the signal of treating the transmission, calculates suitable L1, C1, C2's parameter, can make a plurality ofly to wait to launch the signal and produce resonance through this circuit and enlarge.
Description
Technical field
The utility model belongs to oil, natural gas, drillng operation measurement while drilling field, particularly relates to a kind of multi-frequency resonance circuit.
Background technology
Electromagnetic wave is propagated in media as well and phase shift and amplitude fading will be occurred, and in non magnetic stratum (as stratum), when frequency is within a few megahertz, the size of phase shift and amplitude fading depends primarily on resistivity of media.According to this general principle, start both at home and abroad to research and develop electromagnetic wave resistivity instrument energetically for geosteering, and the measurement category of electromagnetic wave resistivity instrument is main and tranmitting frequency and the quantity that transmits and receives coil have much relations.But be subject to the restriction of the distance of zero mark of instrument, on instrument, the quantity of transmitting coil can not be too many, in order to obtain the resistivity curve of more different investigation depth, only placing hope on each transmitting coil can the electromagnetic wave signal of the multiple different frequency of alternate emission, but during transmitting coil electromagnetic signals, in order to improve signal strength signal intensity, need first tuning amplification process, traditional tuning circuit, be that parallel resonance or series resonance are all just amplified for a Frequency point frequency-selecting, the demand of actual use can not be met.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art part, the utility model provides a kind of multi-frequency resonance circuit, this circuit structure is simple, and multiple Frequency point can be realized can the function of tuning amplification, make the electromagnetic wave signal of same coil energy alternate emission different frequency, the resistivity curve of the different investigation depth of Real-time Obtaining many.
For achieving the above object, the utility model adopts following technical scheme: a kind of multi-frequency resonance circuit, comprise the first inductance, the first electric capacity and the second electric capacity, described first inductance and the second capacitances in series, connect with the transmitting coil on electromagnetic wave resistivity instrument or receiving coil again, its two ends are connected to power supply, described first electric capacity and the first inductance in parallel.
A kind of electromagnetic wave resistivity instrument, is provided with multiple aforesaid multi-frequency resonance circuit in this electromagnetic wave resistivity instrument.
The beneficial effects of the utility model are: this circuit possessed multiple Frequency point can resonance amplify possibility, as long as according to the frequency relation of armed signal, calculate suitable L1, C1, the parameter of C2, multiple signal to be transmitted can be made to produce resonance by this circuit amplify, this multi-frequency resonance circuit is applied to electromagnetic wave resistivity instrument, make its can same emission source apart under, obtain the resistivity curve of multiple different investigation depth, simultaneously, this circuit adopts passive mode, internal electric source is not needed to power, cabling is relatively simple, be easy to install on the drill collar outer wall near transmitting or receiving coil, thus reduce electromagnetic launch loss.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is a kind of structural representation of electromagnetic wave resistivity instrument.
Wherein: 1. the first transmitting coil, 2. the first multi-frequency resonance circuit, 3. the second transmitting coil 4. second multi-frequency resonance circuit, 5. the first receiving coil, 6. the second receiving coil, 7. the 3rd multi-frequency resonance circuit, 8. the 3rd transmitting coil, 9. the 4th multi-frequency resonance circuit, 10 the 4th transmitting coils, 11. electronic circuits and collecting unit.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
A kind of multi-frequency resonance circuit as shown in Figure 1, comprise the first inductance L 1, first electric capacity C1 and the second electric capacity C2, described first inductance L 1 is connected with the second electric capacity C2, connect with the transmitting coil on electromagnetic wave resistivity instrument or receiving coil La again, a, b are connected with power supply at its two ends, and described first electric capacity C1 is in parallel with the first inductance L 1.
L1 and C1 plays frequency-selecting effect in prime, and when L1 and C1 produces parallel resonance, namely loop conductance Y meets:
Respective resonant frequencies point is
, as frequency to be launched
, this antiresonant circuit becomes capacitive, and C2, La of being equivalent to an electric capacity C and rear end form series resonance; As frequency to be launched
, this antiresonant circuit becomes perception, is equivalent to that inductance L is same with rear end C2, La forms series resonance.Thus, this circuit has possessed multiple Frequency point can resonance possibility of amplifying, as long as according to the frequency relation of armed signal, calculate the parameter of suitable L1, C1, C2, multiple signal to be transmitted can be made to produce resonance amplification by this circuit.
As shown in Figure 2, a kind of electromagnetic wave resistivity instrument, this electromagnetic wave resistivity instrument comprises 4 aforesaid multi-frequency resonance circuit.This apparatus installation is inner at non magnetic drill collar, first multi-frequency resonance circuit 2, second multi-frequency resonance circuit 4, the 3rd multi-frequency resonance circuit 7, the 4th multi-frequency resonance circuit 9 are separately positioned on transmitting coil and the receiving coil place of electromagnetic wave resistivity instrument, and be arranged on the inwall of electromagnetic wave resistivity instrument, output termination 4 transmitting coils 1,3,8,10 and 2 receiving coils 5,6 of 4 multi-frequency resonance circuit, the electronic circuit 11 in input drill collar.The electronic circuit of drill collar inside and collecting unit 11 output signal a and the b point connecting the first multi-frequency resonance circuit 2 and the 4th multi-frequency resonance circuit 9 respectively, and the first transmitting coil 1 and the second transmitting coil 3 two ends are connected the La two ends of the first multi-frequency resonance circuit 2 respectively, the 3rd transmitting coil 8 is connected the La two ends of the 4th multi-frequency resonance circuit 9 respectively with the 4th transmitting coil 10 two ends.Simultaneously, the electronic circuit of non magnetic drill collar inside and collecting unit 11 input signal port connect a and the b point of the second multi-frequency resonance circuit 4 and the 3rd multi-frequency resonance circuit 7 respectively, and the first receiving coil 5 two ends connect the La two ends of the second multi-frequency resonance circuit 4, the second receiving coil 6 two ends connect the La two ends of the 3rd multi-frequency resonance circuit 7.
In well logging, electronic circuit and the collecting unit 11 of drill collar inside alternately export different frequency signals, through the first multi-frequency resonance circuit 2, after amplifying with the 4th multi-frequency resonance circuit 9 resonance, by the first transmitting coil 1, second transmitting coil 3, 3rd transmitting coil 8 and the 4th transmitting coil 10 electromagnetic signals, meanwhile, first receiving coil 5 and the second receiving coil 6 sense electromagnetic wave signal, through the second multi-frequency resonance circuit 4, after amplifying with the 3rd multi-frequency resonance circuit 7, send into electromagnetic wave resistivity instrument internal electron circuit and collecting unit 11, thus calculate phase difference and the attenuation ratio of different frequency electromagnetic wave signal, finally be converted into many resistivity curves again.
The above; be only the utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.
Claims (2)
1. a multi-frequency resonance circuit, it is characterized in that: comprise the first inductance, the first electric capacity and the second electric capacity, described first inductance, the second capacitances in series, be connected with both ends of power after connecting with the transmitting coil on electromagnetic wave resistivity instrument or receiving coil, described first Capacitance parallel connection is at the two ends of the first inductance again.
2. an electromagnetic wave resistivity instrument, is characterized in that: be provided with multiple multi-frequency resonance circuit as claimed in claim 1 in this electromagnetic wave resistivity instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520852321.4U CN205117337U (en) | 2015-10-30 | 2015-10-30 | Multi -frequency resonance circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520852321.4U CN205117337U (en) | 2015-10-30 | 2015-10-30 | Multi -frequency resonance circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205117337U true CN205117337U (en) | 2016-03-30 |
Family
ID=55572956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520852321.4U Expired - Fee Related CN205117337U (en) | 2015-10-30 | 2015-10-30 | Multi -frequency resonance circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205117337U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107582059A (en) * | 2016-07-06 | 2018-01-16 | 韦伯斯特生物官能(以色列)有限公司 | Magnetic generation circuit for tracking system |
| CN110085972A (en) * | 2019-05-06 | 2019-08-02 | 中国科学院地质与地球物理研究所 | A kind of antenna transmission circuit with brill orientation electromagnetic wave resistivity logging instrument |
-
2015
- 2015-10-30 CN CN201520852321.4U patent/CN205117337U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107582059A (en) * | 2016-07-06 | 2018-01-16 | 韦伯斯特生物官能(以色列)有限公司 | Magnetic generation circuit for tracking system |
| CN110085972A (en) * | 2019-05-06 | 2019-08-02 | 中国科学院地质与地球物理研究所 | A kind of antenna transmission circuit with brill orientation electromagnetic wave resistivity logging instrument |
| CN110085972B (en) * | 2019-05-06 | 2020-07-24 | 中国科学院地质与地球物理研究所 | Antenna transceiving circuit of while-drilling azimuth electromagnetic wave resistivity logging instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20211030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |