CN209446750U - A kind of Rock And Soil magnetic field sensor for landslide monitoring - Google Patents
A kind of Rock And Soil magnetic field sensor for landslide monitoring Download PDFInfo
- Publication number
- CN209446750U CN209446750U CN201821205304.1U CN201821205304U CN209446750U CN 209446750 U CN209446750 U CN 209446750U CN 201821205304 U CN201821205304 U CN 201821205304U CN 209446750 U CN209446750 U CN 209446750U
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- rock
- soil
- conducting wire
- field sensor
- 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.)
- Active
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The utility model discloses a kind of Rock And Soil magnetic field sensors for landslide monitoring, comprising: induction coil, induction coil and ground-coupled, for acquiring magnetic field signal；First conducting wire, one end of the first conducting wire connect winding, and the other end connects the input terminal of magnetic field pre-amplifier unit, for the magnetic field signal of acquisition to be transferred to magnetic field pre-amplifier unit；Magnetic field pre-amplifier unit, output end connects one end of the second conducting wire, for receiving magnetic field signal and amplifying, and passes through the second wire transmission to magnetic field signal output unit；Magnetic field signal output unit, input terminal connect the other end of the second conducting wire, and output end connects external equipment, for exporting received amplified magnetic field signal to external equipment.The Rock And Soil magnetic field sensor is able to satisfy the detection or detection requirement that landslide is bred, and measurement is stablized, structure is simple, easy to use, can match existing magnetotelluric method instrument.
Description
Technical field
The utility model belongs to field geology detection technology field more particularly to a kind of magnetic field sensor.
Background technique
Landslide disaster monitoring technology is a comprehensive very strong application branch of learning, is with engineering geology, soil mechanics, electronics
The multiple subjects such as, sensor, surveying and computer technology intersect the synthesis of the technical staple for theory practice basis
Using.
Magnetotelluric method is one of geophysics science detection method, and theoretical and inversion technique is mature, and instrument is early
Have been commercialized and be successfully applied in look for mine, water detection, in engineering geology for many years.Magnetotelluric method can be divided into height according to the height of frequency
A variety of sides such as frequency domain audio magnetotelluric method, audio-frequency magnetotelluric magnetic method, magnetotelluric method, very low frequency super long period magnetotelluric method
Method, respectively for different depth of exploration and exploration purpose.Also commonly using high-frequency audio the earth in landslide engineering geological mapping
Electromagnetic method is explored, and high-frequency audio magnetotelluric method is possible in theory applied to landslide long term monitoring, needs especially to mention
Out, occur a series of micro rupture after rock stress first, and filled by underground water, rock resistivity is thus significant to drop
It is low.Experiment shows that its resistivity would fall to original 1/10th before rock ruptures, so using this as grinding
One of reasonability and the foundation of correctness of the magnetic method that generates electricity monitoring landslide preparation process.
The magnetotelluric method instrument that the country uses at present is using the magnetic field in external magnetotelluric method instrument and its accessory
Sensor, but magnetotelluric method instrument and magnetic field sensor be by being sold in set, even if only magnetic field sensing in use
Device, which goes wrong, also needs international trade declaration to buy and replace or integral replacing, therefore, at high cost, and domestic retail market is still
No general domestic magnetotelluric method instrument and the sale of matched magnetic field sensor, there are no satisfaction detection or monitoring landslide are pregnant
The dedicated Rock And Soil electromagnetic instrument educated and matched Rock And Soil magnetic field sensor sale.
Utility model content
The purpose of this utility model is that: in view of the above-mentioned problems of the prior art, provide a kind of measurement stablize, structure
Simply, easy to use, be able to satisfy landslide and breed the measurement demand of detection or monitoring, and existing general magnetotelluric method instrument can be matched
Rock And Soil magnetic field sensing, to reduce to the working service cost of magnetotelluric method instrument.
To realize that above-mentioned purpose of utility model, the technical solution that the utility model provides are as follows:
A kind of Rock And Soil magnetic field sensor for landslide monitoring, comprising:
Induction coil, the induction coil and ground-coupled, for acquiring magnetic field signal；The induction coil includes magnetic core
And the winding of the axis winding along the magnetic core；
First conducting wire, one end of first conducting wire connect the winding, and the other end connects magnetic field pre-amplifier unit
Input terminal, for the magnetic field signal of acquisition to be transferred to magnetic field pre-amplifier unit；
The magnetic field pre-amplifier unit, output end connects one end of the second conducting wire, for receiving magnetic field signal simultaneously
It amplifies, and passes through the second wire transmission to magnetic field signal output unit；
The magnetic field signal output unit, input terminal connect the other end of second conducting wire, and output end connection is external
Equipment, for exporting received amplified magnetic field signal to external equipment.
The utility model has the beneficial effects that the Rock And Soil magnetic field sensor is able to satisfy the detection that landslide is bred or monitoring is wanted
It asks, measurement is stablized, structure is simple, easy to use, can match existing magnetotelluric method instrument, and replacement is existing to be sold in set
Magnetic field sensor in magnetotelluric method instrument and its accessory, thus the utility model can significantly reduce because safeguarding magnetotelluric method
Accessory, that is, magnetic field sensor maintenance cost of instrument.
Detailed description of the invention
Fig. 1 is the utility model Rock And Soil magnetic field sensor structural schematic diagram；
Fig. 2 is the signal amplification circuit figure of magnetic field pre-amplifier unit in the utility model Rock And Soil magnetic field sensor；
Fig. 3 is the test connection relationship diagram of the utility model Rock And Soil magnetic field sensor；
Fig. 4 is the test effect figure of the utility model Rock And Soil magnetic field sensor；
Fig. 5 is the utility model Rock And Soil magnetic field sensor and the dedicated bar magnet contrast test effect picture of U.S. EH4.
Wherein, the reference numerals are as follows:
1- magnetic core, 2- winding, the first conducting wire of 3-, the magnetic field 4- pre-amplifier unit, the second conducting wire of 5-, 6- magnetic field signal are defeated
Unit out.
Specific embodiment
Specific embodiment of the present utility model is described with reference to the accompanying drawing, more so as to those skilled in the art
Understand the utility model well.It is detailed when known function and design requiring particular attention is that in the following description
Perhaps, when description can desalinate the main contents of the utility model, these descriptions will be ignored herein.
As shown in Figure 1, the utility model provides a kind of Rock And Soil magnetic field sensor for landslide monitoring, comprising:
Induction coil, the induction coil and ground-coupled, for acquiring magnetic field signal；The induction coil includes magnetic core
1 and along the magnetic core 1 axis wind winding 2；
First conducting wire 3, one end of first conducting wire 3 connect the winding 2, and the other end connects magnetic field pre-amplifier unit
4 input terminal, for the magnetic field signal of acquisition to be transferred to magnetic field pre-amplifier unit 4；
The magnetic field pre-amplifier unit 4, output end connects one end of the second conducting wire 5, for receiving magnetic field signal
And it amplifies, and magnetic field signal output unit 6 is transmitted to by the second conducting wire 5；
The magnetic field signal output unit 6, input terminal connect the other end of second conducting wire 5, and output end connection is outer
Portion's equipment, for exporting received amplified magnetic field signal to external equipment.
In the present embodiment, for the faint geomagnetic field value of Rock And Soil in the preparation process of acquisition landslide, magnetic core 1 is typically chosen magnetic conduction
The higher magnetic core of rate, such as: FERRITE CORE, permalloy magnetic core or ferrite core magnetic core.Comprehensively consider, ferrite core magnetic core
Property be worse than the metalline of FERRITE CORE；Permalloy magnetic core advantage is to be easy production, but permalloy magnetic core price
Expensive and require core length longer, easily-deformable to cause magnetic field superposition, in landslide monitoring band limits, FERRITE CORE can
It meets the requirements；It is therefore preferable that using the magnetic core of ferrite material as the magnetic core of Rock And Soil magnetic field sensor.
In the present embodiment, for acquisition landslide preparation process in the faint geomagnetic field value of Rock And Soil, winding 2 using high temperature resistant,
Corrosion-resistant, high insulation, low-heat is quick, the enameled wire of low-resistivity, high intensity.
In the present embodiment, in order to reach the undistorted transmission of Weak magentic-field signal, the utility model uses preposition amplification
Device scheme, it is desirable that gain amplifier is stable, frequency response is stablized, wherein magnetic field pre-amplifier unit 4, including shell and signal
Amplifying circuit.For distortionless amplification induction coil magnetic field value collected, and ensure that gain amplifier is stablized, frequency response is steady
Fixed, the signal amplification circuit of magnetic field pre-amplifier unit 4 should need to meet high frequency response and wide band feature, and working frequency is
1KHz~20KHz.Wherein, the preferably differential multistage amplifier circuit of signal amplification circuit.
Waterproof and dampproof to meet continuous work in field extreme environment in the present embodiment, signal gain amplifier is stablized, frequency
Rate response is stablized, and the shell of magnetic field pre-amplifier unit 4 selects the industrial PVC of heat-resisting, acidproof, corrosion-resistant, noninductive material (poly-
Vinyl chloride) it is processed into mould.
In the present embodiment, to reduce because of random-noise voltage value caused by temperature or other human factors, the first conducting wire 3 is adopted
With double core shielding cable, impedance value is the Ω of 47 Ω~53；Second conducting wire 5 uses shielded multiconductor cable, and impedance value is 47 Ω
~53 Ω.
Magnetic field signal output unit 6 selection can match with existing magnetotelluric method instrument (i.e. with magnetotelluric method instrument
The signal input interface of device matches) connector, in the present embodiment, select eight core military connectors, the U.S. can be matched
The EH-4 magnetotelluric instrument that GEOMERTICS company produces and sells.
Rock And Soil magnetic field sensor in the present embodiment is for acquiring the magnetic field signal of Rock And Soil in the preparation process that comes down
Specific work process are as follows:
Magnetic core 1 and winding 2 and ground-coupled acquire the magnetic field signal in Rock And Soil, and by the first conducting wire 3, will acquire
Magnetic field signal be sent into magnetic field pre-amplifier unit 4；
Magnetic field pre-amplifier unit 4 amplifies the magnetic field signal from winding 2, and will be put by the second conducting wire 5
Big electric field signal is sent to magnetic field signal output unit 6；
Finally, the magnetic field signal amplified through pre-amplifier unit 4 is output to by host by magnetic field signal output unit 6,
To complete the analysis and monitoring to the magnetic field signal of acquisition in real time.
In the present invention, the signal amplification circuit schematic diagram of magnetic field pre-amplifier unit 4 is as shown in Fig. 2, it
It is a kind of differential multistage amplifier circuit, including the cascaded operational being made of primary operational amplifier A1 and secondary operational amplifier A2
Amplifying circuit, wherein magnetic field signal is inputted through resistance R1 from the reverse input end of primary operational amplifier A1 by the end Input, A1
Noninverting input connect power cathode Vin-, the inverting input terminal of A1 passes through the output end of resistance R2 connection A1；The output of A1
End is coupled to the reverse input end of secondary operational amplifier A2 through resistance R3, and the noninverting input of A2 connects positive pole Vin+,
The output end Output of A2 exports amplified magnetic field signal to one end of the second conducting wire 5, and the inverting input terminal of A1 passes through string
Connection resistance R4, R5 are connected to the output end of A2, and the connecting node of series resistance R4, R5 is connected to the inverting input terminal of A2.Its
In, in order to simplify sensor structure, positive pole Vin+, the power cathode Vin- of sensor are mentioned by eight core military products grade connectors
For.Resistance R1, R2, R3, R4 and R5 codetermine preamplifier circuit gain G AIN, and size can be calculated by following formula
Out:
GAIN=(R4/R3) (1+1/2* ((R2/R1)+(R3/R4))+(R2+R3)/R5)；
In order to test the performance and effect of the present embodiment, the EH-4 for having selected GEOMERTICS company, the U.S. to produce and sell
The whole systems such as magnetotelluric instrument and mating preamplifier, electric field receiver, electromagnetic field receivers are as test measuring device
It carries out landslide and breeds monitoring.EH-4 test connection relationship is detailed in shown in attached drawing 3, wherein amplifier is electricity, the preposition amplification of magnetic track
Device, receiver are electric field receiver, electromagnetic field receivers, and Hy, Hx are magnetic field sensor, and Ex0, Ex1, Ey0, Ey1 are electric field sensing
Device, wherein x indicates X-direction, and y indicates Y-direction, and Ex0 and Ex1 collectively constitute the electric field of X-direction, and Ey0 and Ey1 collectively constitute the side Y
To electric field.Hy is that the U.S. originates in mating magnetic field sensor, and Hx is the Rock And Soil magnetic field sensor of the present embodiment, and actual measurement landslide is pregnant
Educate geology and contrast test data and waveform.
Attached drawing 4 is detailed in using the resulting test effect of alloy electrode, the longitudinal axis of left side block diagram is time shaft, there are 49159
Discrete time point, horizontal axis indicate the voltage on the time point, between -10V to+10V, there is 49159 discrete voltages
Value, wherein the channel Hxt is the measurement result of the utility model, and the channel Hyt is the measurement result of external original sensor, institute's measured value
Belong to the same order of magnitude；The right block diagram is that time numeric field data is done Fast Fourier Transform to frequency domain, wherein Hxr is electric field
The real part of Ex, Hxi are the imaginary parts of electric field Ex, and Hyr is the real part of electric field Hy, and Hyi is the imaginary part of electric field Hy, and frequency domain data is one
A imaginary number.The frequecy characteristic of the present embodiment can be compared by Fig. 4, frequency response is close to unanimously and in high band better than the original magnetic in the U.S.
Field sensor, therefore the present embodiment can match with existing magnetotelluric instrument and carry out landslide and breed detection or monitoring.
As shown in figure 5, for the utility model Rock And Soil magnetic field sensor and the dedicated bar magnet contrast test effect of U.S. EH4
Figure, the correctness and superiority of this Rock And Soil magnetic field sensor are demonstrated by comparative analysis again.
Although the illustrative specific embodiment of the utility model is described above, in order to the art
Technical staff understands the utility model, it should be apparent that the utility model is not limited to the range of specific embodiment, to this technology
For the those of ordinary skill in field, as long as various change is in the essence of the utility model that the attached claims limit and determine
In mind and range, these variations are it will be apparent that all are being protected using the utility model creation of the utility model design
Column.
Claims (10)
1. a kind of Rock And Soil magnetic field sensor for landslide monitoring characterized by comprising
Induction coil, the induction coil and ground-coupled, for acquiring magnetic field signal；The induction coil includes magnetic core (1)
And the winding (2) of the axis winding along the magnetic core (1)；
First conducting wire (3), one end of first conducting wire (3) connect the winding (2), and the other end connects magnetic field preamplifier
The input terminal of unit (4), for the magnetic field signal of acquisition to be transferred to magnetic field pre-amplifier unit (4)；
The magnetic field pre-amplifier unit (4), output end connects the one end of the second conducting wire (5), for receiving magnetic field signal
And it amplifies, and be transmitted to magnetic field signal output unit (6) by the second conducting wire (5)；
The magnetic field signal output unit (6), input terminal connect the other end of second conducting wire (5), and output end connection is outer
Portion's equipment, for exporting received amplified magnetic field signal to external equipment.
2. Rock And Soil magnetic field sensor according to claim 1, which is characterized in that the magnetic field pre-amplifier unit
(4) it is made of shell and signal amplification circuit.
3. Rock And Soil magnetic field sensor according to claim 2, which is characterized in that the material of the shell is industry PVC.
4. Rock And Soil magnetic field sensor according to claim 2, which is characterized in that the signal amplification circuit is differential more
Grade amplifying circuit.
5. Rock And Soil magnetic field sensor according to claim 4, which is characterized in that the differential multistage amplifier circuit includes
The cascaded operational amplifying circuit being made of primary operational amplifier A1 and secondary operational amplifier A2, wherein magnetic field signal by
The end Input is inputted through resistance R1 from the reverse input end of primary operational amplifier A1, and the noninverting input of A1 connects power cathode
The inverting input terminal of Vin-, A1 pass through the output end of resistance R2 connection A1；The output end of A1 is coupled to secondary operational through resistance R3
The noninverting input of the reverse input end of amplifier A2, A2 connects positive pole Vin+, after the output end Output of A2 will amplify
Magnetic field signal export to one end of the second conducting wire (5), the inverting input terminal of A1 is connected to the defeated of A2 by series resistance R4, R5
Outlet, and the connecting node of series resistance R4, R5 is connected to the inverting input terminal of A2.
6. Rock And Soil magnetic field sensor according to claim 1, which is characterized in that the magnetic core (1) uses high permeability
FERRITE CORE.
7. Rock And Soil magnetic field sensor according to claim 1, which is characterized in that the winding (2) is using high temperature resistant, resistance to
Burn into height insulate, low-heat is quick, the enameled wire of low-resistivity, high intensity.
8. Rock And Soil magnetic field sensor according to claim 1, which is characterized in that first conducting wire (3) uses twin-core
Shielded cable, impedance value are the Ω of 47 Ω~53.
9. Rock And Soil magnetic field sensor according to claim 1, which is characterized in that second conducting wire (5) uses multicore
Shielded cable, impedance value are the Ω of 47 Ω~53.
10. Rock And Soil magnetic field sensor according to claim 1, which is characterized in that the magnetic field signal output unit (6)
Using eight core military connectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821205304.1U CN209446750U (en) | 2018-07-27 | 2018-07-27 | A kind of Rock And Soil magnetic field sensor for landslide monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821205304.1U CN209446750U (en) | 2018-07-27 | 2018-07-27 | A kind of Rock And Soil magnetic field sensor for landslide monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209446750U true CN209446750U (en) | 2019-09-27 |
Family
ID=68008633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821205304.1U Active CN209446750U (en) | 2018-07-27 | 2018-07-27 | A kind of Rock And Soil magnetic field sensor for landslide monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209446750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802635A (en) * | 2018-07-27 | 2018-11-13 | 成都理工大学 | A kind of Rock And Soil magnetic field sensor for landslide monitoring |
-
2018
- 2018-07-27 CN CN201821205304.1U patent/CN209446750U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802635A (en) * | 2018-07-27 | 2018-11-13 | 成都理工大学 | A kind of Rock And Soil magnetic field sensor for landslide monitoring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103603650B (en) | A kind of transient electromagnetic logger | |
| Tian et al. | Partial discharge detection in cables using VHF capacitive couplers | |
| CN103529366A (en) | UHF (Ultra High Frequency) broadband current sensor based on Rogowski coil principle and joint monitoring system | |
| CN203502602U (en) | Nuclear magnetic resonance detection device eliminating power frequency harmonic interference | |
| CN102565862B (en) | Gradient measurement method of transient electromagnetic response signal and observation device thereof | |
| CN103809206A (en) | Underground water detection device and detection method based on combination of nuclear magnetic resonance and transient electromagnetic method | |
| CN202661585U (en) | Insulation state test system for insulation copper tube bus-bar | |
| CN203640727U (en) | Transient electromagnetic well-logging instrument | |
| CN102253416A (en) | Multi-functional, high-power, multi-channel, rolling and fast measurement electrical method earthquake comprehensive measuring system | |
| CN203480051U (en) | Mining intrinsic safety type transient electromagnetic instrument receiving antenna | |
| CN109900966A (en) | Transmission tower grounding impedance measuring system | |
| CN103472490A (en) | Mining intrinsic safety type transient electromagnetic instrument receiving antenna | |
| CN102809721A (en) | Testing device of radio frequency sensor for on-line monitoring of partial discharge of high-voltage cable terminal and on-line monitoring method | |
| CN209446750U (en) | A kind of Rock And Soil magnetic field sensor for landslide monitoring | |
| CN109001997A (en) | A kind of anti-tampering environment information acquisition system | |
| CN104569768A (en) | Anti-interference method and device for cable partial discharge test | |
| CN204832539U (en) | Active seismic sensor of high sensitivity three -component | |
| CN102841266A (en) | Vertical geoelectric field instrument and observation method thereof | |
| CN201464598U (en) | Concealed cable fault detector | |
| CN108802635A (en) | A kind of Rock And Soil magnetic field sensor for landslide monitoring | |
| CN103941095A (en) | Method for testing electrical resistivity of earth around underground metallic conduit | |
| CN106487341A (en) | A kind of high anti-interference preamplifier | |
| CN106525977B (en) | A kind of grounded screen imaging device based on transient electromagnetic method | |
| CN109001545A (en) | A kind of Rock And Soil electric-field sensor for landslide monitoring | |
| CN213398937U (en) | Time-frequency electromagnetic fracturing monitoring system based on distributed optical fiber sensing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |