CN207752164U - A kind of transient electromagnetic detection device - Google Patents
A kind of transient electromagnetic detection device Download PDFInfo
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- CN207752164U CN207752164U CN201820155539.8U CN201820155539U CN207752164U CN 207752164 U CN207752164 U CN 207752164U CN 201820155539 U CN201820155539 U CN 201820155539U CN 207752164 U CN207752164 U CN 207752164U
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Abstract
The utility model provides a kind of transient electromagnetic detection device.Detection device includes coil device and frame carrier, and wherein coil device includes double transmitting coil, receiving coil, coil fixing support.Double transmitting coils include being mutually parallel but the non-coplanar and arbitrary moment that is powered can generate the first, second transmitting coil of opposing magnetic field in respective hub of a spool；Receiving coil is mounted between double transmitting coils, and spacing is constraint with the not super width of early signal；Coil fixing support is equipped with the rotary shaft of and energy band moving-wire coil apparatus parallel with double transmitting coils overturning, and rotary shaft is equipped with nonmetallic handle.Eliminate the methods of inductive interferences by by the transmitting coil in detection device close to and make its normal perpendicular to region to be measured, the signal before and after 180 ° is overturn in same position point measuring coil device and carry out difference processing.The utility model can make the not super width of early signal, can obtain whole secondary field signal by eliminating inductive interferences, and enhance resolving effect.
Description
Technical field
The utility model is related to transient electromagnetic exploration engineering fields, and in particular to a kind of transient electrical based on double transmitting coils
Magnetic indicator loop.
Background technology
Transient electromagnetic method has evolved into a kind of comparative maturity geophysical prospecting method, can be widely applied to resource exploration, mine, water
The geologic prospect in the fields such as profit, traffic, the application for finely detecting aspect in shallow-layer in recent years have been increasingly becoming hot spot.It is horizontal to be promoted
To resolution ratio and construction convenience, frequently with small multi-turn loop device.However since coil is non-pure resistance load, this will lead
It causes：It is influenced by transmitting coil induction reactance, exciting current and nonideal step waveform, and there are certain turn-off times, in order to just
The shutdown phase is defined as " induction section " in researching and analysing, is defined as after shutdown " decaying section "；When exciting current turns off, sent out
It penetrates, the mutual inductance of receiving coil effect, the factors such as self-induction and its transient process of receiving coil influence, the signal observed, especially
It is that early signal is distorted and is distorted, and causes superficial part detection blind area, influences resolution capability, is brought to the processing explanation of data
Greatly puzzlement.It has been investigated that primary field interference is for early signal distortion effect caused by transmitting, receiving coil mutual inductance effect
Maximum causes the super width of signal, more exacerbates signal distortion degree since its response is very strong, apparatus measures are limited in scope, cannot
It is used, followed by the influence of receiving coil self-induction action.
To weaken the influence that coil mutual inductance and self-induction (being collectively referred to as inductance) distort to measuring signal, existing main countermeasure and
Its shortcoming is as follows：(1) using transmitting, reception separator, although coil mutual inductance influence can be reduced to a certain extent,
But effect is limited, while device coupling effect is deteriorated, and response signal dies down and off-note is relative complex, lateral resolution drop
It is low；(2) by observing whole transient response and record exciting current waveform, binding isotherm, which derives, carries out numerical computations, seeks one
Secondary field interference, then it is rejected or corrected from actual measurement resultant field, but since theoretical calculation and actual deviation cause correction result
Confidence level is poor, while to ensure that instrument has whole observing function, and ensures that early signal cannot surpass width；(3) magnetic is used
Bucking coil reduces the influence of primary field, which not only requires harshness to coil device, while primary field spatial distribution is complicated,
It is easily introduced new interference.There is also problems in terms of feasibility, inhibition for the above method and device.
Utility model content
The technical problem to be solved by the utility model is to coil inductance interference effects to often result in Transient electromagnetic measure letter
Number especially early signal is distorted and is distorted, and the super width of early signal more exacerbates distortion degree, to be difficult to obtain geology
The whole secondary field inductive signal of body causes resolving effect and precision is deteriorated and there are detection blind areas.
The utility model solves above-mentioned technical problem using following technological means：
A kind of transient electromagnetic detection device, including coil device, coil device include that energy band moving-wire coil apparatus carries out 180 °
The coil fixing support of overturning is fixed with double transmitting coils on coil fixing support, and double transmitting coils include existing any time power supply phase
Respective hub of a spool can generate opposing magnetic field and be mutually parallel but non-coplanar the first transmitting coil and the second transmitting coil, i.e.,
First transmitting coil and the second transmitting coil are located at the first plane and the second plane；First transmitting coil and the second hair
Receiving coil is installed between ray circle；The receiving coil between the first transmitting coil, the second transmitting coil at a distance from fix
Or it is adjustable, and the distance is constraint with early stage response signal (or induction segment signal) not super width；The not super width of signal refers to reality
Response signal amplitude refers to without departing from the measurement upper limit and measurement lower limit of measuring instrument, herein the measurement upper and lower limit of measuring instrument
The upper and lower limit of the conversion voltage of analog-digital converter in instrument.
Parallel with double transmitting coils and the overturning of energy band moving-wire coil apparatus rotary shaft is fixed on the coil fixing support；
Coil fixing support is mounted on frame carrier, and frame carrier is equipped with and the matched nonmetallic bearing of rotary shaft；Pass through driving
Rotary shaft, can drive coil device to carry out whole overturning, and nonmetallic bearing is used to reduce frictional resistance when rotation.
The number of turns of first transmitting coil and the second transmitting coil is identical or different, the first transmitting coil and the second transmitting coil
Coiling sequence it is in the same direction or reversed, the connection type of the first transmitting coil and the second transmitting coil using serial or parallel connection mode,
First transmitting coil and the second transmitting coil equal sized differs.Meeting any time power supply phase in the first emission lines
In the case that circle, the second transmitting coil center can generate opposing magnetic field and the not super width of early stage response signal, allow above-mentioned parameter
, will not be excessively harsh for the design of transient electromagnetic detection device, processing, assembling equally accurate requirement there are certain deviation, it is easy to
It realizes.
Further, the receiving coil includes the orthogonal horizontal component receiving coil of normal direction and vertical component
Receiving coil, vertical component receiving coil normal direction is perpendicular to double transmitting coils.So that passing through line on same position point
The difference processing of signal measurement and front and back measuring signal twice before and after 180 ° of coil apparatus once inside out can obtain two components
The corresponding pure induction field signal from geologic body of receiving coil is more advantageous to the precision for improving result of detection.
Further, the coil fixing support and frame carrier are made of non magnetic isolation material, it is ensured that will not be to surveying
Amount signal interferes.
Further, the coil fixing support is equipped with the double transmitting coil spacing of adjustment, receiving coil and the first emission lines
The regulating mechanism of circle and the second transmitting coil spacing；Frame carrier is equipped with the adjusting machine of adjustment coil device and ground interplanar distance
Structure；Width adjustment mechanism is additionally provided on frame carrier；Nonmetallic handle is installed in the rotary shaft.In use, early meeting
In the case of the not super width of phase response signal, every spacing can be adjusted according to actual conditions, increases transient electromagnetic detection device and uses
Flexibility.
Further, the bottom of the frame carrier is equipped with nonmetallic idler wheel, transient electromagnetic detection device easy to remove.
Further, the frame carrier is equipped with nonmetallic handle, when carrying out when detecting construction of non-flat forms ground, increases
If nonmetallic handle transient electromagnetic detection device easy to remove.
Further, first transmitting coil overlaps or misaligned with the central axis of the second transmitting coil, and described
The shape of one transmitting coil and the second transmitting coil is identical or different.Above-mentioned setting for transient electromagnetic detection device design,
Processing, assembling equally accurate requirement will not be excessively harsh, it is easy to accomplish.
The method that above-mentioned transient electromagnetic detection device eliminates inductive interferences includes the following steps：
(1) transient electromagnetic detection device placement is close to region to be measured, keeps double transmitting coil normal directions vertical
In region to be measured；
(2) on a certain location point, by carrying out field source excitation to the power supply of double transmitting coils and being measured using receiving coil
Response signal, then overturns 180 ° on point by coil device in the position, carries out field source excitation again and measures response signal；
(3) coil device 180 ° are overturn after current location point is measured to reset；
(4) the mobile transient electromagnetic detection device repeats step (1) to step (3) to the next position point, until covering
The location point of all settings；Receiving coil position opposite with double spaces of transmitting coil in hold-in winding device in the switching process
It sets and immobilizes.
In detection process or after the completion of detection, i.e., in above-mentioned steps (2) or step (4), to coil at same position point
The front and back measuring signal of device overturning carries out difference processing.It can thus be inherently eliminated one caused by coil mutual inductance effect
Secondary field interference and its caused receiving coil self-induction action interference.
Further, the difference processing method is the measuring signal before and after same position point to be reached the standard grade to coil apparatus overturning
It is denoted as u respectively1(t)、u2(t), the difference DELTA u (t), Δ u (t)=u of the front and back measuring signal of coil device overturning are sought1(t)-u2
(t) or Δ u (t)=u2(t)-u1(t), wherein t is the time.
Further, in the step (1), when carrying out when detecting of ground, keep the normal direction of double transmitting coils vertical
In the ground of position point；When carrying out tunnel or tunnel is detected, make the normal direction of transmitting coil perpendicular to the tunnel
Or face, lateral wall or the roof and floor in tunnel.
The principle and process of technical solutions of the utility model elimination inductive interferences are as follows：Transient electromagnetic method passes through in emission lines
It is provided with pulse current in circle (Tx) and establishes excitation electromagnetic field source, then observation comes from ground in interpulse period by receiving coil (Rx)
The situation of change of the response signal of lower medium, is denoted as uτ(t), it can be obtained according to the law of electromagnetic induction and Lenz's law：Emission lines
Circle and the mutual voltage generated in receiving coil under receiving coil mutual inductance effectM is transmitting, connects in formula
The mutual inductance of take-up circle (has with the magnetic conductivity of the geometry of wire loop, size, the number of turns, relative position and surrounding medium
Close), iTxFor emission current, " ± " and the reference direction of electric current, the relative position of coil and around to related；Mutual voltage is receiving
The electric current generated in coil is denoted as iRx, by iRxCause the receiving coil self induction voltage generatedL is coil in formula
Electrodynamic capacity (intrinsic parameter is solely dependent upon the magnetic conductivity of medium in the geometric dimension, the number of turns, coil of coil), "-" indicate from
Electrification pressure is always the variation for hindering electric current in original circuit.uMRxTx、 uLRxRelative to uτ(t), it is interference signal, by mutual inductance
The total interference signal generated with self-induction (being collectively referred to as inductance) is denoted as uML,Need into
Row compacting is rejected.For the utility model proposes using transient electromagnetic detection device carry out eliminate inductance method, same
Coil device is subjected to 180 ° of overturnings along rotary shaft on one location point：Overturning is front and back by measuring obtained voltage signal difference
It is denoted as u1(t)、u2(t), pure geologic body response signal wherein included is denoted as u respectivelyτ1(t)、uτ2It (t), will be wherein included
The interference voltage signal generated is caused to be denoted as u respectively by inductanceML1、uML2, then u1(t)=uτ1(t)+uML1, u2(t)=uτ2(t)+
uML2.Coil device is subjected to 180 ° of whole overturnings at same position point, due to the space phase of receiving coil and double transmitting coils
It does not change to position, ambient enviroment and ambient condition also do not change, and exciting current is recurrent pulses, waveform one
It causes, therefore the front and back interference signal u for causing to generate by inductance of coil device overturningMLIt is identical, i.e. uML1=uML2；Coil device is whole
Before and after 180 ° of overturning, excitation field source direction is consistent, and 180 ° of receiving coil overturning will make uτ1(t)、uτ2(t) symbol on the contrary,
That is uτ2(t)=- kuτ1(t), k ＞ 0；Thus show that coil device overturns the voltage letter measured before and after 180 ° at same position point
Number difference DELTA u (t)=(1+k) uτ1(t), (k ＞ 0, uτ1(t) decaying segment signal is forward signal) or Δ u (t)=- (1+k) uτ1
(t), (k ＞ 0, uτ1(t) decaying segment signal is negative-going signal).Inductance effect can be thus inherently eliminated to cause to generate
Interference signal, while extracting and enhancing the pure response signal of whole process of geologic body；And according to Transient electromagnetic response feature, low-resistance
The transient response signal amplitude of geologic body is far above high resistant geologic body, and there are magnitude differences for the two, after carrying out difference processing, by force
Exception response amplification is much larger than the amplification of weak anomaly response, so as to more preferably highlight target exception response.
The utility model has the advantage of：
Transient electromagnetic detection device uses the form of double transmitting coils so that power supply any time phase is in respective transmitting coil
Center generates opposing magnetic field, therefore the magnetic field intensity between double transmitting coils can substantially weaken, while enhancing the magnetic to underground
Field radiation, receiving coil are placed between double transmitting coils and separate a determining deviation with transmitting coil, so that in same current
Under shutdown mode, the mutual inductance influence of coil can significantly reduce, it can be ensured that early stage response signal is not in super width.
In the method for eliminating inductive interferences using above-mentioned transient electromagnetic detection device, on same position point, pass through measurement
The front and back signal of coil device overturning simultaneously carries out difference processing, can eliminate the self-induction shadow of coil mutual inductance influence and receiving coil
It rings, realizes " treating both manifestation and root cause of disease ", effective secondary field signal is extracted from distorted signal, to obtain the whole process two from underground
Secondary field response signal can realize no shallow-layer blind area detection.
Vertical component and horizontal component receiving coil are used to receiving coil, once inside out measures and difference processing
The pure induction field signal for obtaining two corresponding geologic bodies of component coil is more advantageous to the precision for improving result of detection.
Except the vertical component coil in requiring double transmitting coils to be mutually parallel and receiving coil keeps phase with double transmitting coils
It is mutually parallel outer, meeting any time power supply phase opposing magnetic field and early stage response signal can be generated at respective transmitting coil center
In the case of not super width, the utility model is to parameters such as the winding sequence of double transmitting coils, the number of turns, size, shapes and concentrically
Coaxial relationship is not required for being consistent, and the centre position of double transmitting coils must be occupy by being not required for it to receiving coil, by
In using with the front and back signal measurement of coil device overturning at location point and the method for difference processing, above-mentioned parameter and correlation are allowed
Situation, will not be excessively harsh for the design of transient electromagnetic detection device, processing, assembling equally accurate requirement there are certain deviation,
It is easily achieved.
According to Transient electromagnetic response law characteristic, the transient response signal amplitude of low-resistance geologic body is far above high resistant geology
Body, there are magnitude differences, and after difference processing, intense anomaly responds amplification and responded much larger than weak anomaly, can more preferably highlight target
Exception response, it is not only especially sensitive to low resistance objective body, also equally there is preferable sensibility to high resistant objective body, for unfilled
Detecting for karst, boulder, nonmetal pipeline etc. is extremely beneficial, being capable of significant increase transverse resolution while improving depth measurement.
Coil device, frame carrier have quality using non magnetic isolation material, scalable, Demountable design
Gently, easy folding and unfolding, be readily transported the advantages of carrying；It, can be with simultaneously because use adjustable length structure, rotary adjustable structure
The double spacing of transmitting coil of adjustment, the spacing of receiving coil and transmitting coil, transmitting coil and receiving coil and ground interplanar distance etc.
Parameter, it is flexible and changeable, it disclosure satisfy that different environment, detection mission and target, visited suitable for flat or non-flat forms ground
Construction is looked into, tunnel is also applied for or coal mine roadway construction is detected, have the advantages that applicability is wide, highly practical.
Description of the drawings
Fig. 1 is the structural schematic diagram of transient electromagnetic detection device in the utility model embodiment 1；
Fig. 2 is the structural schematic diagram of 2 center line coil apparatus of the utility model embodiment；
Fig. 3 is the structural schematic diagram of 3 center line coil apparatus of the utility model embodiment；
Fig. 4 is the structural schematic diagram of 4 center line coil apparatus of the utility model embodiment；
Fig. 5 is the structural schematic diagram of transient electromagnetic detection device in the utility model embodiment 5；
Fig. 6 is the structural schematic diagram of transient electromagnetic detection device in the utility model embodiment 6；
Fig. 7 is the when m- voltage attenuation curve graph in the utility model embodiment 7；
Fig. 8 is before and after 7 center line coil apparatus of the utility model embodiment is overturn and the roads the Duo Ce voltage curve of difference processing cuts open
Face comparison diagram.
In figure：1- coil devices, 2- frame carriers, the bis- transmitting coils of 3-, the first transmitting coils of 31-；The second emission lines of 32-
Circle；4- receiving coils；41- vertical component receiving coils；42- horizontal component receiving coils；5- coil fixing supports；6- rotary shafts；
7- finish lead heads；The nonmetallic handles of 8-；9- nonmetallic bearings；10- adjustable length structures；The nonmetallic idler wheels of 11-；12-
Nonmetallic handle；The ground 13-；The tunnels 14- or tunnel.
Specific implementation mode
In order to the utility model structure feature and it is reached the effect of be further elaborated, implemented using preferable
Example and attached drawing are described in detail, as follows：
Embodiment 1
As shown in Figure 1, transient electromagnetic detection device includes coil device 1 and frame carrier 2.
Coil device 1 includes double transmitting coils 3, receiving coil 4 and coil fixing support 5；Double transmitting coils 3 are mutual by two
It is parallel, concentrically axis, mutually across a certain distance the first transmitting coil 31 of d and the second transmitting coil 32 composition；First emission lines
The winding sequence of circle 31 and the second transmitting coil 32, the number of turns can be the same or different, and series system both can be used or can adopt
It is attached with parallel way, as long as ensureing that any time power supply phase can generate opposing magnetic field in respective hub of a spool；
Receiving coil 4 is located between double transmitting coils 3, can both be located at double 3 centre positions of transmitting coil and may be alternatively located at non-intermediate positions, lead to
Toning tries receiving coil 4 and the distance between the first transmitting coil 31 and the second transmitting coil 32 to ensure early stage response signal
(or induction segment signal) is without departing from the measurement upper limit and measurement lower limit of measuring instrument, herein the measurement upper and lower limit of measuring instrument
Refer to the upper and lower limit of the conversion voltage of the analog-digital converter in instrument；Receiving coil 4 includes vertical component receiving coil 41 and level
The normal of component receiving coil 42, two component coils is vertical but the two can be nonopiate form, and vertical component receives line
Circle 41 is mutually parallel with double holdings of transmitting coil 3；Coil fixing support 5 is for installing fixed double transmitting coil 3, receiving coils 4, energy
Entire coil device 1 is enough driven to carry out 180 ° of overturnings, coil fixing support 5 uses non magnetic isolation material, and using flexible adjustable
Formula structure 10.
Coil device 1 is mounted on by coil fixing support 5 on frame carrier 2；Frame carrier 2 uses non magnetic insulation material
Matter, and using adjustable length structure 10, nonmetallic bearing 9 and nonmetallic idler wheel 11；It is fixed on coil fixing support 5 and double
The parallel rotary shaft 6 of transmitting coil 3, nonmetallic bearing 9 are matched with rotary shaft 6, can be with moving winding by driving rotary shaft 6
Device 1 carries out whole overturning, and nonmetallic bearing is used to reduce frictional resistance when rotation；Nonmetallic hand is installed in rotary shaft 6
Handle 8；Finish lead head 7 is pierced by by nonmetallic bearing 9 and 6 one end through-hole of rotary shaft.Coil fixing support 5 and frame carrier 2
It has been all made of adjustable length structure 10, has been not only convenient for folding and unfolding and transport, and the case where meeting early stage response signal not super width
3 spacing d of double transmitting coils, receiving coil 4 and the spacing of the first transmitting coil and the second transmitting coil, emission lines can be adjusted down
Circle 3 and the parameters such as at a distance from ground 13 of receiving coil 4, it is flexible and changeable to meet different environment, detection mission and target.
The method that inductive interferences are eliminated using above-mentioned transient electromagnetic detection device is as follows：
(1) transient electromagnetic detection device based on double transmitting coils is placed to and is close to region to be measured, makes double emission lines
Circle 3 and 13 keeping parallelism of position point ground, i.e., transmitting coil normal direction is perpendicular to region to be measured；
(2) on a certain location point, by carrying out field source excitation to the power supply of double transmitting coils 3 and being surveyed using receiving coil 4
Response signal is measured, then in the position on point, by nonmetallic handle 8 by coil device 1 along the whole overturning of about 6 rotary shaft
180 °, field source excitation is carried out again and measures response signal；
(3) coil device 1 180 ° are overturn along rotary shaft 6 after current location point is measured to reset；
(4) mobile transient electromagnetic device repeats step (1) to step (3) to the next position point, until covering all settings
Location point.
It can be in detection process or after the completion of detection, i.e., in above-mentioned steps (2) or step (4), to line at same position point
The front and back measuring signal of coil apparatus overturning carries out difference processing.
Above-mentioned difference processing method is that the measuring signal before and after same position point to be reached the standard grade to coil apparatus overturning is denoted as u respectively1
(t)、 u2(t), the difference DELTA u (t), Δ u (t)=u of the front and back measuring signal of coil device overturning are sought1(t)-u2(t) or Δ u
(t)=u2(t)-u1(t), wherein t is the time.
Receiving coil 4 and the relative space position of double transmitting coils 3 are fixed in hold-in winding device 1 in above-mentioned switching process
It is constant.Primary field interference and its caused receiving coil caused by coil mutual inductance effect can be thus inherently eliminated certainly
Sense effect interference.The embodiment is suitable for carrying out detecting construction on a flat ground.
Embodiment 2
As shown in Fig. 2, the present embodiment difference from example 1 is that, double transmitting coils 3 use in the present embodiment
The first transmitting coil 31 and the second transmitting coil 32 that two sizes do not wait, the geometric accuracies such as processing, the assembling of coil
Ask loose, it is easy to accomplish.
Embodiment 3
As shown in figure 3, the present embodiment difference from example 1 is that, double transmitting coils 3 use in the present embodiment
Two not concentrically the first transmitting coils 31 and the second transmitting coil 32 of axis, for the geometry such as processing, the assembling of coil essence
Degree requires loose, it is easy to accomplish.
Embodiment 4
As shown in figure 4, the present embodiment difference from example 1 is that, double transmitting coils 3 use in the present embodiment
Two 31 and second transmitting coils 32 of the first transmitting coil of different shapes, and other can also be used in vertical component receiving coil 41
Shape requires the geometric accuracies such as processing, the assembling of coil loose, it is easy to accomplish.
Embodiment 5
As shown in figure 5, the present embodiment difference from example 1 is that, eliminated in the present embodiment in frame carrier 2
Nonmetallic idler wheel 11, and increase nonmetallic handle 12.The construction that the present embodiment is suitable for non-flat forms ground is detected.
Embodiment 6
As shown in fig. 6, the present embodiment difference from example 1 is that, the present embodiment, which is suitable for tunnel or tunnel, to be applied
Work is detected.When carrying out tunnel or roadway floor or top plate is detected, application mode is with embodiment 1, particularly when progress area
Face or when detecting in advance of lateral wall should keep the normal direction of double transmitting coils perpendicular to corresponding face or lateral wall, and need
At same position point coil device is integrally overturn to 180 ° before and after rotary shaft, overturn the measurement of front and back signal and does phase
The difference processing answered.
Embodiment 7
The present embodiment clicks through the whole 180 ° of overturnings of line coil apparatus using above-mentioned transient electromagnetic detection device in same position
The difference of front and back signal measurement and measuring signal handles contrast experiment, as shown in fig. 7, attenuation curve S1 is line at certain location point
The signal measured before coil apparatus overturning, S2 are the signal measured after being overturn at the location point, and S3 is to carry out difference to S1, S2
Result that treated.Therefrom this it appears that S1, S2 are big by mutual inductance and self-induction interference effect, signal serious distortion but do not surpass
Width, treated that result achieves the desired results for difference, can will become apparent from using the utility model proposes transient electromagnetic detecting
The severe jamming that device can effectively eliminate inductance by overturning the technical solution of measurement method and difference processing method influences, and obtains
The whole secondary field inductive signal from underground geologic bodies is fetched, and enhances the amplitude of useful signal.
As shown in figure 8, including the roads coil device overturning Qian Duoce voltage curve sectional view, the roads coil device overturning Hou Duoce
Voltage curve sectional view and the roads coil device same position point overturning front and back measuring signal difference processing Duo Ce voltage curve section
Figure, the roads the Duo Ce voltage section that can will become apparent from only difference processing method being used to obtain by comparison can be significantly presented
Go out the exception response of underground shallow part cavity.
Basic principles, main features, and advantages of the present invention has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Only the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model the utility model also have respectively
Kind changes and improvements, these changes and improvements are both fallen in claimed the scope of the utility model.The requires of the utility model
Protection domain defined by appended claims and its equivalent.
Claims (7)
1. a kind of transient electromagnetic detection device, which is characterized in that including coil device, coil device includes energy band moving-wire coil apparatus
The coil fixing support of 180 ° of overturnings is carried out, double transmitting coils are fixed on coil fixing support, double transmitting coils include appointing the power supply phase
Meaning the moment respective hub of a spool can generate opposing magnetic field and be mutually parallel but the first non-coplanar transmitting coil and second hair
Ray circle；Receiving coil, the receiving coil and the first hair are installed between first transmitting coil and the second transmitting coil
Distance between ray circle, the second transmitting coil is constraint with the not super width of early stage response signal；
Parallel with double transmitting coils and the overturning of energy band moving-wire coil apparatus rotary shaft is fixed on the coil fixing support；Coil
Fixed frame is mounted on frame carrier, and frame carrier is equipped with and the matched nonmetallic bearing of rotary shaft；
The number of turns of first transmitting coil and the second transmitting coil is identical or different, the first transmitting coil and the second transmitting coil
Coiling sequence it is in the same direction or reversed, the connection type of the first transmitting coil and the second transmitting coil using serial or parallel connection mode,
First transmitting coil and the second transmitting coil equal sized differs.
2. a kind of transient electromagnetic detection device according to claim 1, which is characterized in that the receiving coil includes normal
The orthogonal horizontal component receiving coil in direction and vertical component receiving coil, vertical component receiving coil normal direction are vertical
In double transmitting coils.
3. a kind of transient electromagnetic detection device according to claim 1, which is characterized in that the coil fixing support and frame
Carrier is made of non magnetic isolation material.
4. a kind of transient electromagnetic detection device according to claim 1, which is characterized in that the coil fixing support is equipped with
The regulating mechanism of the double transmitting coil spacing of adjustment, receiving coil and double transmitting coil spacing；Frame carrier is equipped with adjustment coil
The regulating mechanism of device and ground interplanar distance；Width adjustment mechanism is additionally provided on frame carrier；Non- gold is installed in the rotary shaft
Belong to handle.
5. a kind of transient electromagnetic detection device according to claim 1, which is characterized in that the bottom of the frame carrier is set
There is nonmetallic idler wheel.
6. a kind of transient electromagnetic detection device according to claim 1, which is characterized in that the frame carrier is equipped with non-
Metal handle.
7. a kind of transient electromagnetic detection device according to claim 1, which is characterized in that first transmitting coil and
The central axis of two transmitting coils overlaps or misaligned, and first transmitting coil is identical as the shape of the second transmitting coil or not
Together.
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|---|---|---|---|
| CN201820155539.8U CN207752164U (en) | 2018-01-30 | 2018-01-30 | A kind of transient electromagnetic detection device |
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| CN201820155539.8U CN207752164U (en) | 2018-01-30 | 2018-01-30 | A kind of transient electromagnetic detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008451A (en) * | 2018-01-30 | 2018-05-08 | 安徽惠洲地质安全研究院股份有限公司 | A kind of transient electromagnetic detection device and the method for eliminating inductive interferences |
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2018
- 2018-01-30 CN CN201820155539.8U patent/CN207752164U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008451A (en) * | 2018-01-30 | 2018-05-08 | 安徽惠洲地质安全研究院股份有限公司 | A kind of transient electromagnetic detection device and the method for eliminating inductive interferences |
| CN108008451B (en) * | 2018-01-30 | 2024-04-12 | 安徽惠洲地质安全研究院股份有限公司 | Transient electromagnetic detection device and method for eliminating inductance interference |
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