CN112363230A - Electromagnetic detection method for railway tunnel unmanned aerial vehicle - Google Patents
Electromagnetic detection method for railway tunnel unmanned aerial vehicle Download PDFInfo
- Publication number
- CN112363230A CN112363230A CN202010902527.9A CN202010902527A CN112363230A CN 112363230 A CN112363230 A CN 112363230A CN 202010902527 A CN202010902527 A CN 202010902527A CN 112363230 A CN112363230 A CN 112363230A
- Authority
- CN
- China
- Prior art keywords
- unmanned helicopter
- apparent resistivity
- measuring
- area
- wide area
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/081—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices the magnetic field is produced by the objects or geological structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/38—Processing data, e.g. for analysis, for interpretation, for correction
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Electromagnetism (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses an electromagnetic detection method for a railway tunnel unmanned aerial vehicle, which comprises the following steps: selecting emission sources at proper positions in a survey area, and arranging emission pole distances of 1-2 kilometers; transmitting a dense frequency point multi-frequency current signal, and transmitting a pseudo-random multi-frequency current signal containing 7 to 19 main frequency points at one time; arranging a plurality of measuring lines in a target exploration area, wherein the distance between the measuring lines is 50-100 meters; measuring magnetic signals along a measuring line by adopting a receiver, simultaneously recording position information, and calculating wide area apparent resistivity; the receiver is carried by an unmanned helicopter, the unmanned helicopter selects a battery-powered multi-rotor unmanned helicopter or a fuel-oil type unmanned helicopter, and the unmanned helicopter flies and measures at one time according to a measuring line; and carrying out data processing and inversion interpretation on the measured data to obtain the underground electrical characteristic structure. The invention can be used for exploration in the area where the ground cannot be constructed; a larger exploration depth can be obtained; higher detection resolution can be obtained; the detection efficiency is high.
Description
Technical Field
The invention relates to an electromagnetic detection method for an unmanned aerial vehicle in a railway tunnel, and belongs to the technical field of electromagnetic detection by using the unmanned aerial vehicle in railway tunnel construction.
Background
The total length of Sichuan-Tibet railways is nearly 1000 kilometers, wherein the tunnel accounts for more than 80%, and the lines cross the transverse mountains and cross the great rivers such as the great river, the elegant rice huller river, the billows river, the Jinshajiang river, the angjiang river and the like. The conditions of terrain and geological conditions along the line are complex, steep and severe, cold and oxygen deficiency, and the ground geophysical detection is extremely difficult, so that ground detection cannot be carried out in many places. The aviation geophysical exploration is an indispensable method for solving the geophysical exploration of the Chuanghai-Tibet line.
The electromagnetic method is the most common method for acquiring underground electrical characteristics, the most common aviation electromagnetic method is an aviation transient electromagnetic method, but the detection depth of the aviation transient electromagnetic method is shallow, and the exploration requirement of construction and exploration of a tunnel of a tibetan line cannot be met; the existing aviation frequency domain electromagnetic method such as a natural field source electromagnetic method adopted by GEOTECH company in Canada has the advantages of extremely small number of frequency points and far-reaching resolution ratio which can not meet the exploration requirement.
The wide-area electromagnetic method is newly developed and has the advantages of large exploration depth, high resolution and the like, and the application of the aviation wide-area electromagnetic method can effectively solve the problem of Chuanheng line electromagnetic exploration.
Disclosure of Invention
The invention aims to provide an electromagnetic detection method for a railway tunnel unmanned aerial vehicle, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electromagnetic detection method for an unmanned aerial vehicle in a railway tunnel comprises the following steps:
1) selecting emission sources at proper positions in a survey area, and laying 1-2 kilometer long emission pole distances;
2) transmitting a dense frequency point multi-frequency current signal, and transmitting a pseudo-random multi-frequency current signal containing 7 to 19 main frequency points at one time;
3) laying a plurality of measuring lines in a target exploration area, wherein the distance between the measuring lines is 50-100 meters;
4) measuring magnetic signals along a measuring line by adopting a receiver, simultaneously recording position information, and calculating wide area apparent resistivity;
5) the receiver is carried by an unmanned helicopter, the unmanned helicopter selects a battery-powered multi-rotor unmanned helicopter or a fuel-oil type unmanned helicopter, and the unmanned helicopter flies and measures at one time according to a measuring line;
6) and carrying out data processing and inversion interpretation on the measured data to obtain the underground electrical characteristic structure.
As a further scheme of the invention, wide area apparent resistivity is calculated according to the measured magnetic signal, current signal and position information to obtain an underground electrical characteristic structure;
E-Hz wide area apparent resistivity calculation formula:
in the formula:
E-Hy wide area apparent resistivity calculation formula
In the formula:
calculating the wide area apparent resistivity by adopting an iterative method;
E-Hx wide area apparent resistivity calculation formula:
in the formula:
and (4) solving the wide-area apparent resistivity by adopting an iterative method.
Compared with the prior art, the invention has the beneficial effects that: the invention can be used for exploration in the area where the ground cannot be constructed; a larger exploration depth can be obtained; higher detection resolution can be obtained; the detection efficiency is high.
Drawings
FIG. 1 is a schematic diagram of a detection system of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, the detection system mainly comprises a ground transmitter, an emitter A, B and a receiving device of the unmanned aerial vehicle. The ground transmitter supplies high-power pseudo-random multi-frequency alternating current signals to the ground through the emitting electrodes A and B and measures current signals, a plurality of detection measuring lines are arranged in a detection area which is at a certain distance (transmitting-receiving distance) away from the ground transmitter, the receiving device of the unmanned aerial vehicle flies along the measuring lines, meanwhile, magnetic field, position and attitude information are collected, and the underground electrical characteristics of the detection area are obtained through calculation according to the information.
Selecting emission sources at proper positions in a survey area, and arranging emission pole distances A and B, wherein the linear distance between AB poles is 1-2 km according to the specific terrain;
the AB electrodes are connected to the AB output ports of the transmitter through cables respectively, and the cables need to meet the requirements of transmitting current carrying capacity;
the transmitter transmits a high-power pseudorandom multi-frequency current signal, the current is usually dozens of amperes to more than one hundred amperes, the transmitted waveform is dense frequency point pseudorandom multi-frequency waves, and the main frequency point selects one of 7 frequencies, 9 frequencies, 11 frequencies, 13 frequencies, 15 frequencies and 19 frequencies according to actual conditions;
measuring and recording emission current information;
setting a plurality of measuring lines in a target detection area according to a detection task, wherein the distance between the measuring lines is 50-100 meters; planning a flight mission plan according to a certain principle;
installing an electromagnetic signal receiving system (comprising a receiver, a magnetic sensor, an attitude sensor and a GPS) on an aircraft;
starting a flight task, starting an acquisition task, measuring a magnetic signal, and recording position information and attitude information;
calculating wide area apparent resistivity according to the measured magnetic signals, current signals and position information to obtain underground electrical characteristics;
E-Hz wide area apparent resistivity calculation formula
In the formula
E-Hy wide area apparent resistivity calculation formula
In the formula
And (4) solving the wide-area apparent resistivity by adopting an iterative method.
E-Hx wide area apparent resistivity calculation formula
In the formula
And (4) solving the wide-area apparent resistivity by adopting an iterative method.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that variations, modifications, substitutions and alterations can be made in the embodiment without departing from the principles and spirit of the invention.
Claims (2)
1. An electromagnetic detection method for an unmanned aerial vehicle in a railway tunnel is characterized by comprising the following steps:
1) selecting emission sources at proper positions in a survey area, and laying 1-2 kilometer long emission pole distances;
2) transmitting a dense frequency point multi-frequency current signal, and transmitting a pseudo-random multi-frequency current signal containing 7 to 19 main frequency points at one time;
3) laying a plurality of measuring lines in a target exploration area, wherein the distance between the measuring lines is 50-100 meters;
4) measuring magnetic signals along a measuring line by adopting a receiver, simultaneously recording position information, and calculating wide area apparent resistivity;
5) the receiver is carried by an unmanned helicopter, the unmanned helicopter selects a battery-powered multi-rotor unmanned helicopter or a fuel-oil type unmanned helicopter, and the unmanned helicopter flies and measures at one time according to a measuring line;
6) and carrying out data processing and inversion interpretation on the measured data to obtain the underground electrical characteristic structure.
2. The electromagnetic detection method of the unmanned aerial vehicle for the railway tunnel according to claim 1, wherein wide-area apparent resistivity is calculated according to the measured magnetic signal, current signal and position information to obtain an underground electrical characteristic structure;
E-Hz wide area apparent resistivity calculation formula:
in the formula:
E-Hy wide area apparent resistivity calculation formula
In the formula:
calculating the wide area apparent resistivity by adopting an iterative method;
E-Hx wide area apparent resistivity calculation formula:
in the formula:
and (4) solving the wide-area apparent resistivity by adopting an iterative method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902527.9A CN112363230A (en) | 2020-09-01 | 2020-09-01 | Electromagnetic detection method for railway tunnel unmanned aerial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902527.9A CN112363230A (en) | 2020-09-01 | 2020-09-01 | Electromagnetic detection method for railway tunnel unmanned aerial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112363230A true CN112363230A (en) | 2021-02-12 |
Family
ID=74516778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010902527.9A Pending CN112363230A (en) | 2020-09-01 | 2020-09-01 | Electromagnetic detection method for railway tunnel unmanned aerial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112363230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960674A (en) * | 2021-10-14 | 2022-01-21 | 湖北省水文地质工程地质勘察院有限公司 | Wide-area electromagnetic method two-dimensional inversion method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597506A (en) * | 2015-01-26 | 2015-05-06 | 吉林大学 | Frequency domain ground-to-air electromagnetic prospecting method |
| CN104749640A (en) * | 2015-03-26 | 2015-07-01 | 吉林大学 | Multi-source multi-frequency ground-air electromagnetic detection emission method |
| CN105891892A (en) * | 2016-06-12 | 2016-08-24 | 何继善 | Device and method for whole-region measurement of vertical components of current source frequency domain magnetic fields |
| CN110471117A (en) * | 2019-09-26 | 2019-11-19 | 国科（重庆）仪器有限公司 | A kind of aviation electromagnetic detection system and method |
-
2020
- 2020-09-01 CN CN202010902527.9A patent/CN112363230A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597506A (en) * | 2015-01-26 | 2015-05-06 | 吉林大学 | Frequency domain ground-to-air electromagnetic prospecting method |
| CN104749640A (en) * | 2015-03-26 | 2015-07-01 | 吉林大学 | Multi-source multi-frequency ground-air electromagnetic detection emission method |
| CN105891892A (en) * | 2016-06-12 | 2016-08-24 | 何继善 | Device and method for whole-region measurement of vertical components of current source frequency domain magnetic fields |
| CN110471117A (en) * | 2019-09-26 | 2019-11-19 | 国科（重庆）仪器有限公司 | A kind of aviation electromagnetic detection system and method |
Non-Patent Citations (2)
| Title |
|---|
| 何继善: "广域电磁探测法研究", 《中南大学学报（自然科学版）》 * |
| 徐毅等: "地空频率域电磁探测方法在隧道勘探中的应用", 《科技与创新》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960674A (en) * | 2021-10-14 | 2022-01-21 | 湖北省水文地质工程地质勘察院有限公司 | Wide-area electromagnetic method two-dimensional inversion method |
| CN113960674B (en) * | 2021-10-14 | 2023-11-21 | 湖北省水文地质工程地质勘察院有限公司 | Wide-area electromagnetic method two-dimensional inversion method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104597506B (en) | The air-ground electromagnetic exploration method of frequency domain | |
| CN101661111B (en) | Method for performing seismograph control and data transmission by using short message and short message control and transmission type cableless seismograph | |
| US2531088A (en) | Electrical prospecting method | |
| CN102062877B (en) | Nuclear magnetic resonance detection device and method for advanced detection of water bodies in front | |
| CN103576205B (en) | Air-ground transient electromagnetic exploration method based on composite magnetic source technology | |
| CN104280781A (en) | Towrope type ocean controllable source electromagnetism and earthquake data collection system | |
| CN102628959B (en) | Captive balloon-carried type wireless telemetric seismic instrument system | |
| CN111257951B (en) | Ground-air short-offset electromagnetic detection system and multi-source emission signal separation method | |
| US5610523A (en) | Method and apparatus of interrogating a volume of material beneath the ground including an airborne vehicle with a detector being synchronized with a generator in a ground loop | |
| CN105607053A (en) | Buoy-type high-frequency ground wave radar system | |
| CN105807325A (en) | Frequency domain aviation extremely low frequency electromagnetic method | |
| CN103809204B (en) | A kind of collecting method of field audio magnetotelluric method | |
| CN105301663A (en) | Time-frequency electromagnetic exploration data air acquisition device and system | |
| CN110471117A (en) | A kind of aviation electromagnetic detection system and method | |
| CN201514489U (en) | Short message type no-cable seismograph | |
| US20220035062A1 (en) | Semi-airborne Time Domain Electromagnetic Exploration System for Unmanned Aerial Vehicle | |
| CN114114429B (en) | Device and method for sounding and exploring ground-air frequency inclinometer | |
| Unterberger | Radar propagation in rock salt | |
| CN110376651B (en) | Time-frequency electromagnetic device based on horizontal bipolar current source and geophysical exploration method | |
| CN112363230A (en) | Electromagnetic detection method for railway tunnel unmanned aerial vehicle | |
| CN104391332A (en) | Shallow sea double-frequency controllable source electromagnetic prospecting method | |
| CN205139386U (en) | Time frequently aerial collection system of electromagnetic survey data and system | |
| CN103499842A (en) | Micron-sized electromagnetic exploration method | |
| Stoll* et al. | Semi-Airborne electromagnetics using a multicopter | |
| CN102162860A (en) | High-power extremely low frequency and ultralow frequency artificial source electromagnetic method for geological prospecting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210212 |
|
| RJ01 | Rejection of invention patent application after publication |