CN103809203A - Outdoor detection working method resolving electromagnetic interference - Google Patents
Outdoor detection working method resolving electromagnetic interference Download PDFInfo
- Publication number
- CN103809203A CN103809203A CN201210438937.8A CN201210438937A CN103809203A CN 103809203 A CN103809203 A CN 103809203A CN 201210438937 A CN201210438937 A CN 201210438937A CN 103809203 A CN103809203 A CN 103809203A
- Authority
- CN
- China
- Prior art keywords
- measuring point
- instrument
- data
- field signal
- electromagnetic interference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
Provided is an outdoor detection working method resolving electromagnetic interference. The invention belongs to an outdoor working method in the field geophysical exploration and specifically relates to a working method for overcoming electromagnetic interference caused by a high-voltage transmission line for an audio magnetotelluric method in outdoor actual operation so as to increase a signal-to-noise ratio and improve the quality of acquired original data. The working method comprises following steps of: (1) setting a reference station at a position 10 km far from a measuring point, and placing an instrument to measure an original magnetic field signal and an original electric field signal of a natural electromagnetic field; (2) placing N-2 (N is more than or equal to 3) electric track acquisition stations at a measuring point near a high-voltage transmission line in order to acquire an electric field signal of the measuring point; (3) placing an electric track acquisition station at a measuring point 300m vertically far from the high-voltage transmission line in order to acquire a magnetic field signal and an electric field signal; (4) turning on instruments at the N-1 measuring points in the steps (2) and (3) in order to perform measurement; (5) recording and saving acquired time series data; and (6) processing the time series data in order to acquire apparent resistivity and impedance phase data.
Description
Technical field:
The invention belongs to the outdoor operation method in geophysical survey field, being specifically related to a kind of is to overcome the electromagnetic interference (EMI) that high voltage transmission line causes in the real work in the wild of audio-frequency magnetotelluric magnetic method, thereby enhancing signal to noise ratio (S/N ratio), the method for work of the raw data quality that raising is obtained.
Background technology:
Audiomagnetotelluric sounding method is take the electric conductivity of country rock in the earth's crust and objective body and the difference of magnetic conductivity as its main geophysics prerequisite, according to electromagnetic induction principle study electromagnetic field in space, the temporal regularity of distribution, by gathering the electromagnetic signal of 1～10000Hz in natural, thereby obtain subsurface rock resistivity distribution rule, distinguish underground country rock and objective body, or solve a kind of geophysical exploration method of the problems such as tectonic structure.With respect to magnetotelluric sounding method (MT), its depth of exploration is shallow, is generally usually used in surveying 1000 meters of above tectonic structure problems, fruitful to resource exploration.Compared with DC resistivity, have that device is light, work efficiency is high, do not need the advantages such as artificial power supply, prospecting prime cost is low, the degree of depth is large, particularly have and be not subject to resistive formation shielding and low resistivity zone is had to higher resolution characteristic.So since the seventies, the method is more and more subject to various countries Some Comments On Geophysical Work person's attention, in geophysical survey work, bring into play more and more important effect.
Conventionally, when audio magnetotelluric method instrument is worked in the wild, be all to gather electric field signal on measuring point and field signal as shown in Figure 1 simultaneously, the frequency range of collection is roughly 1～10000Hz, the frequency range that different instruments gather is slightly different.In this signal frequency range gathering at audio magnetotelluric method instrument, be very easy to be subject to the impact of artificial interference, especially the impact of commercial power.But, along with the day by day expansion of scientific and technological progress and human activity scope, even if also often existing stronger humanity, mountain area disturbs, and the ultra-high-tension power transmission lines such as particularly 10,000 volts, 3.5 ten thousand volts, 11 Wan Fu, disturb very serious to natural electromagnetic signal.Affect 50Hz and the quality of data of frequency range doubly thereof, when serious, even caused cannot using in the data of hi-line near zone collection.At present, most advanced and ripe electromagnetic apparatus in the world, even if the sunken power frequency technology of soft, hard two aspects that inside is integrated, as instrument and equipments such as V8 multi-functional electric device, EH4 conductivity meters, also cannot overcome near the interference problem of bringing hi-line in work.Therefore,, in order to obtain high-quality raw data, the anti-hi-line perturbation technique of research audio-frequency magnetotelluric magnetic method is very necessary.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of method of work that solves electromagnetic interference (EMI) in audiomagnetotelluric sounding method work, the comprehensive high voltage transmission line of analyzing produces the reason of interference and traditional anti-interference method, while adopting audio-frequency magnetotelluric magnetic method instrument to work near hi-line, electric signal separates acquisition technique with magnetic signal, is used in conjunction with reference technique far away simultaneously and solves the impact of high voltage transmission line on audio-frequency magnetotelluric magnetic method.
In order to realize this purpose, technical scheme of the present invention is a kind of field detection method of work that solves electromagnetic interference (EMI), comprises the following steps:
(1) apart from the about 10km of measuring point place, a reference station is being set, place 1 apparatus measures Natural electromagnetic field original field signal and electric field signal;
(2) near measuring point hi-line, place N-2(N >=3) Tai electricity road acquisition station gathers the electric field signal at this some place;
(3) place a magnetic track acquisition station at the about 300m measuring point of vertical range high voltage transmission line place, gather field signal and electric field signal;
(4) laid after the instrument and equipment on N-1 measuring point in step (2) and step (3), this N-1 platform instrument has been placed in to duty; After reference station device power-up, the instrument and equipment on N-1 measuring point in opening steps (2) and step (3) is measured;
(5) all appts completes after acquisition tasks, finishes the Instrument working state on each measuring point, records and preserve the time series data of obtaining; After N-1 measuring point surveying instrument in step (2) and step (3) completes 20 minutes data recording to half an hour and preserve, preserve reference station data also with reference to station shutdown;
(6) data N platform instrument obtained obtain on N-1 measuring point apparent resistivity and the impedance phase data corresponding with different frequency through unified processing of the professional software supporting with instrument, the formatted file that again frequency point data is converted to industrial standard, finally obtains audio magnetotelluric method data result.
Further, a kind of field detection method of work that solves electromagnetic interference (EMI) as above, when field work the selection principle of reference station be within the scope of near unmanned movable, 1km without electromagnetic interference (EMI), be easy to picking and placeing of instrument.
Further, a kind of field detection method of work that solves electromagnetic interference (EMI) as above, in step (2), the apparatus measures Natural electromagnetic field signal frequency range that gathers electric field signal is 0.00005Hz～10000Hz.
Further, a kind of field detection method of work that solves electromagnetic interference (EMI) as above, realizes by GPS between the instrument that measuring point is placed in step (3) and the N-1 platform instrument in step (1) and step (2) that image data is temporal synchronizes.
Accompanying drawing explanation:
Fig. 1 is audio-frequency magnetotelluric magnetic method field work schematic diagram;
Fig. 2 is Anti-Jamming Technique field work schematic diagram;
Fig. 3 is Anti-Jamming Technique implementation result schematic diagram.
In figure: 1-audio magnetotelluric method instrument, 2-north-south magnetic probe, 3-East and West direction magnetic probe, 4-electrode, 5-storage battery, 6-electricity road acquisition station, 7-magnetic track acquisition station, 8-GPS orientator antenna, 9-reference station, 10-hi-line; In Fig. 3: left side two figure are that electric signal and magnetic signal isolation technics obtain curve, right side two figure obtain curve after reference technique far away is processed, and top two figure are apparent resistivity curve, and below two figure are impedance phase curve.
Embodiment:
Below in conjunction with accompanying drawing, technical solution of the present invention is elaborated.
A kind of field detection method of work that solves electromagnetic interference (EMI) of technical solution of the present invention, as shown in Figure 2, concrete grammar comprises the following steps its layout scheme:
(1) apart from the about 10km of measuring point place, a reference station is being set, place 1 instrument be used for measuring Natural electromagnetic field original field signal and electric field signal; When field work the selection principle of reference station be within the scope of near unmanned movable, 1km without electromagnetic interference (EMI), be easy to picking and placeing of instrument.
(2) near measuring point hi-line, place N-2(N >=3) Tai electricity road acquisition station gathers the electric field signal at this some place; The apparatus measures Natural electromagnetic field signal frequency range that gathers electric field signal is 0.00005Hz～10000Hz.
(3) place a magnetic track acquisition station at the about 300m measuring point of vertical range high voltage transmission line place, be used for gathering field signal and electric field signal; Between magnetic track acquisition station and N-1 platform instrument in step (1) and step (2), realize by GPS that image data is temporal synchronizes.
(4) laid after the instrument and equipment on N-1 measuring point in step (2) and step (3), this N-1 platform instrument has been placed in to duty; After reference station device power-up, the instrument and equipment on N-1 measuring point in opening steps (2) and step (3) is measured;
(5) all appts completes after acquisition tasks, finishes the Instrument working state on each measuring point, records and preserve the time series data of obtaining; After N-1 measuring point surveying instrument in step (2) and step (3) completes 20 minutes data recording to half an hour and preserve, preserve reference station data also with reference to station shutdown;
(6) data N platform instrument obtained obtain on N-1 measuring point apparent resistivity and the impedance phase data corresponding with different frequency through unified processing of the professional software supporting with instrument, the formatted file that again frequency point data is converted to industrial standard, finally obtains audio magnetotelluric method data result.
For the embodiment of anti-hi-line perturbation technique is described, (model is as RXU-3ER for the V8 multi-functional electric device of producing take Canadian phoenix company; Can measure 3 track datas simultaneously, measure Natural electromagnetic field signal frequency range from 0.00005Hz to 10000Hz, 12V DC-voltage supply, power consumption is 15 watts; In work, adopt tensor pattern) introduce the interference that how to overcome hi-line in audio-frequency magnetotelluric magnetic method field work for example.For improving field work efficiency, saving job costs, in real work, anti-hi-line perturbation technique may be taked different embodiments because of the difference of instrument condition, condition of work.
For example, if there are three instruments, and line direction and hi-line power transmission line trend is bordering on vertically, can obtain so at most two data on measuring point simultaneously; If there are four instruments, can obtain so at most three data on measuring point simultaneously; If there is more instrument and equipment, can obtains at most instrument quantity and subtract 1 measurement and count.But because audio magnetotelluric method instrument equipment is comparatively expensive, and also more high each side reason of more hired laborers of instrument cost, so seldom there is more than 5 instrument to devote oneself to work in general same workspace simultaneously.Based on this because of, below just there to be situation that 4 instruments are worked specifically to introduce the implementation method of anti-hi-line perturbation technique in a workspace simultaneously.
What when field work, the layout scheme of 4 instruments adopted is, and two electrical signal collections stand near measuring point hi-line measures electric signal, a V8 main frame is measured electric signal and magnetic signal on the measuring point at the about 300m of Distance High Voltage Electricity Transfer place simultaneously, a V8 main frame is stood as reference in the place apart from the about 10km in workspace, and this programme of work once can complete the surveying work of three measuring points simultaneously.
When field work, first lay reference station, and by the instrument work of starting shooting.Then, then press the instrument and equipment that accompanying drawing 3 is laid on other three measuring points, after completing, by instrument start, be placed in duty.When all appts completes after acquisition tasks, finish the Instrument working state on each measuring point, record and preserve the time series data of obtaining.Three surveying instruments complete after data recording preservation, and notification reference station personnel, preserve reference station observation data.Finally, the data that four instruments are obtained, through the unified processing of professional software, can obtain three audio magnetotelluric method data results on measuring point.
Under 110,000 volts of hi-lines, implement the data of anti-hi-line perturbation technique acquisition as shown in Figure 3.Conventionally, traditional measuring method cannot obtain any useful data at this measuring point place, and adopt the audio-frequency magnetotelluric magnetic data at this some place obtaining after anti-hi-line perturbation technique visible as shown in Figure 3, hi-line below cannot obtain data by classic method, to the data available that uses electric signal and magnetic signal isolation technics to obtain, after reference technique far away is processed, obtain continuous, smooth quality data again, absolutely proved the effect of anti-hi-line perturbation technique.
Claims (4)
1. a field detection method of work that solves electromagnetic interference (EMI), is characterized in that: comprise the following steps:
(1) apart from the about 10km of measuring point place, a reference station is being set, place 1 apparatus measures Natural electromagnetic field original field signal and electric field signal;
(2) near measuring point hi-line, place N-2(N >=3) Tai electricity road acquisition station gathers the electric field signal at this some place;
(3) place a magnetic track acquisition station at the about 300m measuring point of vertical range high voltage transmission line place, gather field signal and electric field signal;
(4) laid after the instrument and equipment on N-1 measuring point in step (2) and step (3), this N-1 platform instrument has been placed in to duty; After reference station device power-up, the instrument and equipment on N-1 measuring point in opening steps (2) and step (3) is measured;
(5) all appts completes after acquisition tasks, finishes the Instrument working state on each measuring point, records and preserve the time series data of obtaining; After N-1 measuring point surveying instrument in step (2) and step (3) completes 20 minutes data recording to half an hour and preserve, preserve reference station data also with reference to station shutdown;
(6) data N platform instrument obtained obtain on N-1 measuring point apparent resistivity and the impedance phase data corresponding with different frequency through unified processing of the professional software supporting with instrument, the formatted file that again frequency point data is converted to industrial standard, finally obtains audio magnetotelluric method data result.
2. a kind of field detection method of work that solves electromagnetic interference (EMI) as claimed in claim 1, is characterized in that: when field work the selection principle of reference station be within the scope of near unmanned movable, 1km without electromagnetic interference (EMI), be easy to picking and placeing of instrument.
3. a kind of field detection method of work that solves electromagnetic interference (EMI) as claimed in claim 1, is characterized in that: in step (2), the apparatus measures Natural electromagnetic field signal frequency range that gathers electric field signal is 0.00005Hz～10000Hz.
4. a kind of field detection method of work that solves electromagnetic interference (EMI) as claimed in claim 1, is characterized in that: between the instrument that measuring point is placed in step (3) and the N-1 platform instrument in step (1) and step (2), realize by GPS that image data is temporal synchronizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438937.8A CN103809203B (en) | 2012-11-06 | 2012-11-06 | Outdoor detection working method resolving electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438937.8A CN103809203B (en) | 2012-11-06 | 2012-11-06 | Outdoor detection working method resolving electromagnetic interference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103809203A true CN103809203A (en) | 2014-05-21 |
| CN103809203B CN103809203B (en) | 2017-02-22 |
Family
ID=50706252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210438937.8A Active CN103809203B (en) | 2012-11-06 | 2012-11-06 | Outdoor detection working method resolving electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103809203B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272067A (en) * | 2017-06-05 | 2017-10-20 | 长江大学 | Method is found oil in a kind of optically-active |
| CN108107478A (en) * | 2017-12-25 | 2018-06-01 | 湖南科技大学 | Magnetotelluric synchronizing detection and real time inversion method and system |
| CN109683202A (en) * | 2019-02-20 | 2019-04-26 | 湖南强军科技有限公司 | A kind of system and method for electromagnetic survey data acquisition |
| CN110441825A (en) * | 2019-09-04 | 2019-11-12 | 上海海事大学 | The visible detection method of electric wire within the walls |
| CN114089428A (en) * | 2021-10-29 | 2022-02-25 | 中国矿业大学 | Time domain electromagnetic tensor well logging method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596763B (en) * | 2019-08-23 | 2021-04-23 | 南方科技大学 | Three-dimensional acquisition method and device for magnetotelluric data and terminal equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620277A (en) * | 2009-07-28 | 2010-01-06 | 甘肃铁道综合工程勘察院有限公司 | Controlled source audio-frequency magnetotelluric (CSAMT) double-transmitting multi-receiving data acquiring system and CSAMT double-transmitting multi-receiving data acquiring method |
-
2012
- 2012-11-06 CN CN201210438937.8A patent/CN103809203B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620277A (en) * | 2009-07-28 | 2010-01-06 | 甘肃铁道综合工程勘察院有限公司 | Controlled source audio-frequency magnetotelluric (CSAMT) double-transmitting multi-receiving data acquiring system and CSAMT double-transmitting multi-receiving data acquiring method |
Non-Patent Citations (5)
| Title |
|---|
| GARCIA Z. 等: "A new methodology for qacuisition and processing of audio-magnetotelluric (AMT) data in the AMT dead band", 《GEOPHYSICS》 * |
| 张全胜 等: "大地电磁测深资料的去噪方法", 《石油地球物理勘探》 * |
| 杨生 等: "远参考大地电磁测深法应用研究", 《物探与化探》 * |
| 熊识仲: "远参考道大地电磁测深的实际应用", 《石油地球物理勘探》 * |
| 陈清礼 等: "长距离远参考大地电磁测深试验研究", 《石油地球物理勘探》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272067A (en) * | 2017-06-05 | 2017-10-20 | 长江大学 | Method is found oil in a kind of optically-active |
| CN108107478A (en) * | 2017-12-25 | 2018-06-01 | 湖南科技大学 | Magnetotelluric synchronizing detection and real time inversion method and system |
| CN109683202A (en) * | 2019-02-20 | 2019-04-26 | 湖南强军科技有限公司 | A kind of system and method for electromagnetic survey data acquisition |
| CN109683202B (en) * | 2019-02-20 | 2020-06-16 | 湖南强军科技有限公司 | System and method for collecting electromagnetic exploration data |
| CN110441825A (en) * | 2019-09-04 | 2019-11-12 | 上海海事大学 | The visible detection method of electric wire within the walls |
| CN110441825B (en) * | 2019-09-04 | 2021-04-27 | 上海海事大学 | Visual detection method for electric wire in wall |
| CN114089428A (en) * | 2021-10-29 | 2022-02-25 | 中国矿业大学 | Time domain electromagnetic tensor well logging method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103809203B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103809203B (en) | Outdoor detection working method resolving electromagnetic interference | |
| CN102183792B (en) | Artificial source frequency domain electromagnetic sounding device and measurement method | |
| CN102012525B (en) | Distribution type multi-parameter deep electromagnetic section imaging system and measuring method thereof | |
| CN103809204B (en) | A kind of collecting method of field audio magnetotelluric method | |
| CN104375191B (en) | A kind of magnetotelluric data acquisition system and its acquisition method | |
| CN106896415A (en) | A kind of short offset distance transient electromagnetic detecting method of ground well grounded source | |
| CN103389514A (en) | MT (magnetotelluric) denoising device and method | |
| CN104656156A (en) | Magnetic reference processing method for acquiring data in three dimensions audio-frequency magnetotelluric sounding | |
| CN104297807A (en) | Magnetic resonance imaging device for underground disaster water source detection and detection and imaging method | |
| CN110007357A (en) | A kind of aviation TEM and aviation MT joint inversion method | |
| CN105204073B (en) | A kind of tensor apparent conductivity measuring method | |
| CN104330832A (en) | Transient electromagnetic quick three-dimensional human-machine interaction inversion method | |
| Qiu et al. | 3-D full-wave inversion of helicopter transient electromagnetic data in frequency domain | |
| CN102879828A (en) | Audio magnetotelluric optimized collection method | |
| CN1580818A (en) | Artificial source time frequency electro magnetic bathymetry | |
| Di et al. | Field testing of the surface electromagnetic prospecting system | |
| Goldie | A comparison between conventional and distributed acquisition induced polarization surveys for gold exploration in Nevada | |
| CN108873077A (en) | A kind of new natural electric field exploitation method | |
| CN110109184B (en) | Passive field source type three-dimensional electric field exploration method based on multiple daily change points | |
| Wang et al. | 3D finite-difference modeling algorithm and anomaly features of ZTEM | |
| CN103809202A (en) | Induced polarization sounding multichannel observation method | |
| Oskooi | 1D interpretation of the Magnetotelluric data from Travale Geothermal Field in Italy | |
| Sun et al. | Three-Dimensional Urban Subsurface Space Tomography with Dense Ambient Noise Seismic Array | |
| Yu et al. | Comparative analysis of divergence of tipper imaging with natural and orthogonal electric sources | |
| Liu et al. | Development of multi-channel observation and inversion for IP electrical sounding method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |