CN105301665B - A kind of metal sensor and the method for the besieged object in the medium of metal sensor detection - Google Patents
A kind of metal sensor and the method for the besieged object in the medium of metal sensor detection Download PDFInfo
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- CN105301665B CN105301665B CN201510455505.1A CN201510455505A CN105301665B CN 105301665 B CN105301665 B CN 105301665B CN 201510455505 A CN201510455505 A CN 201510455505A CN 105301665 B CN105301665 B CN 105301665B
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Abstract
The invention discloses a kind of methods for being surrounded object in the medium for metal sensor detection, the attribute and location information of besieged object are obtained by analysis measuring signal, the vector signal that the signal and preset signals that receiving coil end generates when the measuring signal is the sensor detecting state obtain after subtracting each other, the preset signals are the signal that sensor receiving coil end generates in the case of not there is no object.The present invention provides a kind of detection method, can improve the sensitivity to target analyte detection, and not will form the blind area of measurement, substantially increase the precision of measurement.
Description
Technical field
Quilt is detected the present invention relates to detection positioning field more particularly to a metal sensor and for the metal sensor
The method for surrounding object in the medium.
Background technique
Metal detector is mainly used for positioning metallic objects, and existing detector is divided into many classifications, also leads to
A variety of principles are crossed to be operated.For example, its main building block is sensor, and what sensor was made up of coil, use hair
Ray circle emits continuous alternating field, which is received by receiving coil, relative to transmitting coil, this receiving coil arrangement
At making in the case where no object under test has an impact, induced voltage is generated on receiving coil and is cancelled out each other, so that sense
Voltage output is answered to be close to 0, in the case where having object under test to have an impact, object under test will change original alternating field, more
For accurate, object under test can generate the field of another alternation, and this alternating field can be transmitted to receiving coil, and in receiving coil
Upper generation induced voltage can determine determinand position by analyzing it.
Fig. 1 is sensor structure schematic diagram in the prior art, geometry are as follows: receives line by two groups reversed first
Ring 1 and second receives the receiving coil system that wire loop 2 forms, and first, which receives wire loop 1 and second, receives wire loop 2 in common plane
It is arranged coaxially with each other in 3, transmitter coil 4 is located on the common receiver plane 3 at certain distance z, the transmitter
Coil is equally coaxially arranged with the first reception wire loop 1 or the second reception wire loop 2.First receives the winding of wire loop 1 herein for example
It winds in a clockwise direction, then the second winding for receiving wire loop 2 is counterclockwise wound, the voltage inducted in these windings
Therefore there is opposite symbol, and compensate one another there is no external object when suitably determining size
Without exporting induced voltage.Have the defects that by sensor positioning object as follows: (1) sensor of the prior art can only
For detecting the presence of metal, and it can not determine its attribute；(2) due to transmitting coil one very big alternating field of generation, and by
It is extremely small that object, which is surveyed, by the counter field that induction generates, and detects the alternating field that extremely faint measured object generates so working as
When, receiving coil has to ignore the alternating field that huge transmitting coil generates, so that receiving coil and transmitting coil are not present
Inductively, in the prior art in coil layout mode, it is necessary to make the first reception wire loop 1 and second receive wire loop 2 it is opposite around
To, must also offset in this way by object generate alternating field, reduce the sensitivity of detection；(3) it is specific to be located at some for determinand
The induced voltage that the second magnetic field is incuded when position, in receiving coil can thus will form measurement in state is completely counterbalanced by
Blind area detects fall short object, and actually object is existing, that is to say, that there is measurement blind spot or sensitivity most
Extremely low region；(4) due to the coaxial different radii of the second coil of first coil, change magnetic flux mainly by changing area come real
Existing, in order to reach large range of compensation, the semidiameter of 2 coils cannot be too small, can only pass through the size of increasing circuit plate
It realizes, necessarily occupies circuit board space in this way.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provides a kind of besieged in the medium for metal sensor detection
The method of object, by analyzing the amplitude and phase of receiving coil output signal, to determine attribute and the position of measured object.Simultaneously
The present invention also provides a kind of metal sensor, by arrange it is having the same around to receiving coil system, can improve pair
The sensitivity of object, and not will form the blind area of measurement, substantially increase the precision of measurement.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals:
A method of it being surrounded object in the medium for metal sensor detection, is obtained by analysis measuring signal
It is surrounded the attribute and location information of object, receiving coil end generates when the measuring signal is the sensor detecting state
The vector signal that signal and preset signals obtain after subtracting each other, the preset signals are that sensor receives line in the case of not there is no object
Enclose the signal that end generates.
Further, when the amplitude of the vector signal C is greater than given threshold, to the phase of the vector signal C into
Row analysis, when the phase of the vector C is in first phase section, output judges in signal display medium there are metal object,
The endpoints thereof in the first phase section is respectively examined object vector when being magnetic conductivity maximum and magnetic conductivity the smallest metal
The phase value of signal C.
Further, when the amplitude of the vector signal C is greater than given threshold, to the phase of the vector signal C into
Row analysis: when the phase of the vector C is in second phase section, output judges that there are magnetic metals in signal display medium
Object, the endpoints thereof in the second phase section are respectively that examined object is magnetic conductivity maximum and the smallest magnetic gold of magnetic conductivity
The phase value of vector signal C when category；When the phase of the vector signal C is in third phase section, output judges that signal is shown
In medium object be nonmagnetic metal, the endpoints thereof in the third phase section be respectively examined object be magnetic conductivity maximum and
The phase value of vector signal C when magnetic conductivity the smallest nonmagnetic metal.
Further, the amplitude variation of vector signal C, the primary peak in the amplitude variation of record vector signal C are analyzed
Plan-position one and two where value and secondary peak value, using the midpoint information of plan-position one, two as object in medium
Closest to location information export.
The invention also discloses a kind of metal sensor, concrete scheme is as follows:,
A kind of metal sensor has at least one transmitting coil being inductively coupled to one another and at least one receiving coil system
System, the receiving coil system include at least one first receiving coil being generally aligned in the same plane and at least one second reception line
Circle, the transmitting coil form projection on the plane, the region packet that first receiving coil is formed on the plane
Containing the projection, the region that second receiving coil is formed on the plane is arranged in around the projection, described
First receiving coil and the electrical connection of the second receiving coil.
Further, the region that first receiving coil is formed on the plane all includes the projection.
Further, the region part that first receiving coil is formed on the plane includes the projection.
Further, the region that second receiving coil is formed on the plane is one, and the region is in open
Choma is wound on around the projection.
Further, the region that second receiving coil is formed on the plane is at least two, the region
It is sequentially distributed around the projection.
Further, the company of first receiving coil and/or the second receiving coil and/or first and second receiving coil
1 output stage is respectively equipped in wiring.
Further, first receiving coil is equipped at least two output stage, and second receiving coil is equipped at least 2
A output stage.
The present invention obtain it is following the utility model has the advantages that
(1) detection method through the invention, the signal that analysis receiving coil end generates obtain after subtracting each other with preset signals
Vector signal obtain the attribute and location information of besieged object, can position and identify well the attribute of tested metal；
(2) the second magnetic field generated for object, it is in the same direction around to the induced electromotive force that they are generated is mutually folded due to receiving coil
Add, sensitivity of the receiving coil to the magnetic field induction of object can be enhanced, and not will form the blind area of measurement, substantially increase survey
The accuracy of amount；And first receiving coil and the second receiving coil arrangement on circuit boards, for external coiling receiving coil, tool
There is the precision of position very high, can accomplish 0.1mm or more at present, substantially increases the consistency of product, it can also be better
The induced voltage of the first magnetic field generation is offset, arrangement can reduce cost on circuit boards.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of prior art metal sensor；
Fig. 2 is a kind of structural schematic diagram of metal sensor embodiment one of the present invention；
Fig. 3 is a kind of structural schematic diagram of metal sensor embodiment two of the present invention；
Fig. 4 is a kind of corresponding receiving coil system connection schematic diagram of metal sensor embodiment one of the invention；
Fig. 5 is a kind of corresponding receiving coil system connection schematic diagram of metal sensor embodiment two of the invention；
Fig. 6 is a kind of corresponding principle structural map of one geometry of metal sensor embodiment of the present invention；
Fig. 7 is a kind of corresponding principle structural map of two geometry of metal sensor embodiment of the present invention；
Fig. 8 is a kind of corresponding detection schematic diagram of metal sensor embodiment one of the invention；
Fig. 9 is a kind of corresponding detection schematic diagram of metal sensor embodiment two of the invention；
Figure 10 is the polar plot of analysis method of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained under the premise of being not necessarily to creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom" "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Unless otherwise defined, the technical term or scientific term used herein should be in fields of the present invention and has
The ordinary meaning that the personage of general technical ability is understood.Used in present patent application specification and claims " the
One ", " second " and similar word are not offered as any sequence, quantity or importance, and are used only to distinguish different
Component part.Equally, the similar word such as "one" or " one " does not indicate that quantity limits yet, but indicates that there are at least one.
For all technical staff in this field, it is a known fact that term " field wire " should not be in literal upper reason
Solution, this is because to a certain extent, " field wire " only more simply indicates same magnetic intensity and polar region.Due to this original
Cause, in the following description of the present invention, this term will be used to indicate magnetic density.In order to better describe, only with a winding come
Indicate coil.It will be readily understood that the present invention, which is regarded as its starting point coil, has multiple windings or coil " printing " onboard.
In the present embodiment, a method of it being surrounded object in the medium for metal sensor detection, it is specific to detect
Method is as follows: the attribute and location information of besieged object is obtained by analysis measuring signal, the measuring signal is described
The vector signal that the signal and preset signals that receiving coil end generates when sensor detecting state obtain after subtracting each other, the default letter
Number not there is no the signal that sensor receiving coil end generates in the case of object.
When the amplitude of the vector signal C is greater than given threshold, the phase of the vector signal C is analyzed, when
Output judges in signal display medium there are metal object when the phase of the vector C is in first phase section, described first
The phase of the endpoints thereof of phase interval is respectively examined object when being magnetic conductivity maximum and magnetic conductivity the smallest metal vector signal C
Place value.
Preferably, the phase of C can also be further analyzed, to detect the attribute of tested metal.Specifically such as
Under, when the amplitude of the vector signal C is greater than given threshold, the phase of the vector signal C is analyzed: when the arrow
Output judges that there are magnetic metal object, second phases in signal display medium when measuring the phase of C in second phase section
The endpoints thereof in position section is respectively examined object vector signal C when being magnetic conductivity maximum and magnetic conductivity the smallest magnetic metal
Phase value；When the phase of the vector signal C is in third phase section, output judges in signal display medium object to be non-
Magnetic metal, the endpoints thereof in the third phase section are respectively that examined object is that magnetic conductivity maximum and magnetic conductivity are the smallest non-
The phase value of vector signal C when magnetic metal.
The detection scheme working principle of the embodiment of the present invention is as follows: when the amplitude of the vector signal C is greater than given threshold
When, theoretically no object there are the case where, the amplitude of C is 0, phase is also just not present, but in practice, due to power supply
Noise, the distribution of receiving coil, the noise of operational amplifier circuit, temperature, the influence of humidity etc. factor, so that vector signal C is not
It is 0, it is assumed that given threshold W, so phase is also uncertain, is namely deposited without object at this time due to the randomness of noise
, when vector amplitude be greater than W, when phase also meets condition, just think with the presence of object at this time.
Different circuit parameter, different receiving coil distributions, measures same object, and phase is also different, so
After circuit determines, magnetic conductivity maximum and the smallest metal object of magnetic conductivity are measured respectively, and record their phase value,
It can be obtained by the covered phase range of metal object.When the amplitude of vector C be greater than W when, and phase be located at cover the first phase
Within the interval range of position, at this time it may determine that with the presence of metal, the endpoints thereof in the first phase section is respectively to be detected
The phase value of vector signal C when object is magnetic conductivity maximum and magnetic conductivity the smallest metal；Similarly, measurement magnetic conductivity is maximum respectively
With the smallest magnetic metal of magnetic conductivity, and their phase value is recorded, so that it may the covered phase range of magnetic metal is obtained,
So and phase is located within covered second phase interval range when the amplitude of vector C is greater than W, at this time it may determine that
The metal that is magnetic exists, wherein it is magnetic conductivity maximum and magnetic conductance that the endpoints thereof in the second phase section, which is respectively examined object,
The phase value of vector signal C when rate the smallest magnetic metal.Similarly, it measures magnetic conductivity maximum respectively and magnetic conductivity is the smallest non-magnetic
Property metal, and record their phase value, so that it may the covered phase range of object is obtained, so the amplitude as vector C is big
When W, but phase is located within covered third phase interval range, at this time it may determine that with the presence of nonmagnetic metal,
Described in third phase section endpoints thereof be respectively examined object be magnetic conductivity maximum and the smallest non magnetic gold of magnetic conductivity
The phase value of vector signal C when category, thus distinguishing object is magnetic metal or nonmagnetic metal, detection through the invention
Method can accurately obtain the attribute of detected material, and precision is high.
Preferably, it can be changed by further analyzing the amplitude of measuring signal, be recorded in the amplitude variation of measuring signal
Plan-position one and two where first wave peak value and secondary peak value, using the midpoint information of plan-position one, two as Jie
Object exports closest to location information in matter.As shown in Figure 10, by metal sensor, object is not located at reception line
When the lower section of circle, when receiving coil system is closer to object, the amplitude of vector C is also bigger, when receiving coil is far from target
Object, the amplitude of vector C are also just smaller；When metal is mobile towards receiving coil by receiving coil edge, the amplitude of vector C is by small
Become larger, when vector C amplitude suddenly from large to small, illustrate the central point of the second receiving coil system of object proximity, mark at this time
For the starting point at midpoint, when the amplitude of vector C is changed from small to big suddenly, illustrate that object is in the center of the second receiving coil,
When vector C amplitude suddenly from large to small, illustrate that object far from the second receiving coil, is labeled as the terminal at midpoint at this time.It should
The sensor disclosed in embodiment that sensor used in detection object is preferably discussed below in preferred embodiment.Pass through
Above-mentioned measurement method makes sensor, and there is no measurement blind spot or the most extremely low regions of sensitivity.
The invention also discloses a kind of sensor, specific embodiment is as follows:
As the embodiment of the present invention, as shown in Fig. 2, the schematic diagram greatly simplified shows the sheet for locating metallic objects
The first embodiment of the sensor geometries of invention sensor.A kind of metal sensor has one be inductively coupled to one another
Transmitting coil 100 and a receiving coil system 200, the present embodiment is with a transmitting coil 100 and a receiving coil system
It is illustrated for 200, but sensor of the invention does not limit to one.Receiving coil system 200 of the invention includes being located at
Conplane first receiving coil 201 and second receiving coil 202, the transmitting coil 100 is in the plane
Upper formation projection, the region that first receiving coil 201 is formed on the plane all include the projection, certainly also
Part be can be comprising the projection, the region that second receiving coil 202 is formed on the plane is one, and institute
The region stated is looped around around the projection in opening, and the first receiving coil 201 and the electrical connection of the second receiving coil 202,
It includes that first receiving coil 201 being generally aligned in the same plane and one second connect that similarly receiving coil system 200, which does not limit to,
Take-up circle 202, composition can be two or more.
As the embodiment of the present invention, as shown in figure 3, the schematic diagram greatly simplified shows the sheet for locating metallic objects
The second embodiment of the sensor geometries of invention sensor.A kind of metal sensor has one be inductively coupled to one another
Transmitting coil 100 and a receiving coil system 200, the present embodiment is with a transmitting coil 100 and a receiving coil system
It is illustrated for 200, but sensor of the invention does not limit to one.Receiving coil system 200 of the invention includes being located at
Conplane first receiving coil 201 and second receiving coil 202, the transmitting coil 100 is in the plane
Upper formation projection, the region that first receiving coil 201 is formed on the plane all include the projection, certainly also
Part be can be comprising the projection, the region that second receiving coil 202 is formed on the plane is two, respectively
For the second receiving coil (202', 202 "), the region is sequentially distributed around the projection, and the first receiving coil
201 and second receiving coil (202', 202 ") electrical connection, similarly receiving coil system 200 limit to include be located at it is same put down
One first receiving coil 201 and two second the second receiving coils of receiving coil (202', 202 ") in face, composition can be
Three or more.
In the present embodiment, when layout as shown in Figure 3, optimum way is that the second receiving coil (202', 202 ") group is closed
Symmetrical in transmitting coil 100, in various factors such as humidity, temperature will affect the magnetic field of transmitting coil 100, if at
Symmetrically, this influence is more preferably balanced out, it is certainly asymmetric also to may be implemented.During specific implementation, sometimes to mention
High sensitivity increases receiving coil system such as the first receiving coil 201 or the second under the premise of maintaining the balance of induced voltage
The area that the number of turns and coil of receiving coil (202,202', 202 ") are included can improve the sensitivity of measurement.
100 position of the transmitting coil setting of the present embodiment can be positioned at certain distance on the common receiving plane
Place, and with receiving coil system 200 in parallel arrangement, it is fixed for the transmitting coil 100 that printed circuit is equipped at least two
The location hole of installation, the pin of transmitting coil 100 are inserted into location hole and weld on circuit boards；Transmitting coil 100 may be used also
To be that the conductor structure being directly arranged on printed circuit board or insertion are arranged in printed circuit board, these modes are ok
's.
First receiving coil 201 and the second receiving coil 202 of the invention has identical around to for the correspondence of embodiment one
Connection type, as shown in figure 4, the anode of the induced voltage of the first receiving coil 201 is connected to the sense of the second receiving coil 202
The cathode of voltage is answered, the induced voltage of coil is added, similarly for the corresponding connection type of embodiment two, as shown in Figure 5.At this
As can be seen that for the induced voltage that receiving coil incudes the first magnetic field in kind connection type, such connection type again may be used
It is superposition for the second magnetic field induction voltage to offset induced voltage, so the induction in the first magnetic field of induction can be balanced out
Voltage, and can increase the induced voltage in the second magnetic field of induction, greatly improve the sensitivity of detection.
As shown in Figures 6 and 7, for object generate the second magnetic field, induced voltage formula be according to E=n ΔΦ/Δ t,
E: induced electromotive force (V), n: number of inductive coil turns, ΔΦ/Δ t: the change rate of magnetic flux, due to coil it is in the same direction around to it
The induced electromotive force that generates be overlapped mutually, will not so sensitivity of the receiving coil to the magnetic field induction of object can be enhanced
The blind area for forming measurement, substantially increases the accuracy of measurement；And first receiving coil and the second receiving coil be arranged in circuit
On plate, for external coiling receiving coil, the precision with position is very high, can accomplish 0.1mm or more at present, greatly improve
The consistency of product, can also preferably offset the induced voltage of the first magnetic field generation, and arrangement can reduce on circuit boards
Cost.
In the present embodiment, as shown in figure 8, the point expression of black in figure is tie point i.e. output stage, usually
It can be arranged in the start and end of coil, at least one tie point is generally set on the first receiving coil 201 in figure, if set
It is set to a tie point, then the starting position of coil is set, set-point is more, and the range that can be calibrated is also bigger, generally
3 points, which are arranged, to be advisable, and first receiving coil 201 of corresponding embodiment one is equipped with 3 output stages (11,22,33), output stage
Location interval it is smaller, the precision that can be calibrated is higher, and being generally about separated by about one circle is advisable, and interval holding one
It causes.At least one tie point is generally set on the second receiving coil 202 in figure, it is settable if being arranged to a tie point
In the terminal position of coil, generally it is arranged 3~10 or so, second receiving coil 202 of corresponding embodiment one is equipped with 3
The position for meeting the following conditions can be arranged in reach preferably calibration effect in output stage tie point by output stage (44,55,66)
It sets: the voltage incuded between the output stage of spaced furthest on second receiving coil in the presence of no metal and institute
It is of substantially equal to state the voltage for being spaced on the first receiving coil and incuding between 2 nearest output stages；Or first receiving coil
It is spaced on the voltage and second receiving coil incuded between the output stage of upper spaced furthest and incudes between 2 nearest output stages
Voltage is of substantially equal, and the location interval of the tie point on the second receiving coil is smaller, and the precision that can be calibrated is higher, then needing
Tie point it is also more, being generally about separated by about one circle is advisable, and interval holding is consistent.
3 output stages (11,22,33) on first receiving coil 201 respectively with switching device (11 ˋ, 22 ˋ, 33 ˋ) one
End electrical connection, the other end of three switching devices are electrically connected with the input terminal of amplifying circuit 500, the delivery outlet of amplifying circuit 500
It is connected with processor 400, the switching device of the present embodiment is Mos pipe or triode, 400 control switch device of processor
Closure and unlatching.The amplifier of the present embodiment is typically chosen high input impedance, low noise, the operational amplifier of Low Drift Temperature.
Similarly, 3 output stages (44,55,66) on the second receiving coil 202 respectively with switching device (44 ˋ, 55 ˋ, 66
One end electrical connection ˋ), the other end of three switching devices are electrically connected with the input terminal of amplifying circuit 500, amplifying circuit 500
Delivery outlet is connected with processor 400.
The running gear when not there is no object to be positioned, processor 400 is by control switch device successively to each defeated
The output signal amplitude of grade carries out that switching device setting information is detected and stored out, and the switching device setting information is to each defeated
Signal amplitude is compared each switching device open and-shut mode information corresponding to the minimum amplitude output signal filtered out out；According to
The switching device setting information controls each switching device opening and closing, and running gear carries out object positioning.
Specific implementation process is as follows:
In the case that no object there are, drive transmitting coil 100, generate the magnetic field of alternation, the detection amplification of processor 400
The amplitude of 500 output signal of circuit.
Switching device 11 ' and switching device 44 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude A1；
Switching device 11 ' and switching device 55 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude A2；
Switching device 11 ' and switching device 66 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude A3；
Switching device 22 ' and switching device 44 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude B1；
Switching device 22 ' and switching device 55 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude B2；
Switching device 22 ' and switching device 66 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude B3；
Switching device 33 ' and switching device 44 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude C1；
Switching device 33 ' and switching device 55 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude C2；
Switching device 33 ' and switching device 66 ' are opened, other switching devices, the detection output letter of amplifying circuit 500 are closed
Number amplitude C3；
Minimum amplitude is found out, obtains the state of corresponding switching device, and this state is stored in nonvolatile memory
In, in lower task, the state of the sense switch directly from nonvolatile memory of processor 400 is substantially increased to mesh
Mark the sensitivity that physical prospecting is surveyed；The state of the switching device of the present embodiment has n*m kind state, and wherein n is positioned at the first receiving coil
On tie point number, m is the number of tie point on the second receiving coil.
In the present embodiment, as shown in figure 9, device for embodiment two, due to the second receiving coil 202' and second
What receiving coil 202 " was symmetrical set substantially, the input of the output end and the second receiving coil 202 " of the second receiving coil 202'
End electrical connection, other principles are with above example one, and details are not described herein.
In short, the first receiving coil of the embodiment of the present invention 201 and second reception line can be arranged in lesser area it is more
Coil turn, and the coil different location of the first receiving coil 201 and the second receiving coil (202,202', 202 ") be arranged
The output stage being connected with switching device large range of can be calibrated in this way, space is greatly saved, can increase setting
Switch number, improve degree of regulation, and can to induced voltage realize twocouese calibration, greatly improve degree of regulation.
It in embodiments of the present invention, further include analysis circuit, the analysis circuit includes operational amplifier and processor, sheet
The output stage of the receiving coil system 200 of inventive embodiments can be connected by switching device with the analysis circuit.It can be with
Directly it is connected with the analysis circuit, is illustrated below with being connected by switching device with the analysis circuit, processor can
With the unlatching and closure of control switch device, the switching device other end connecting with the tie point on the first receiving coil 201 connects
It is connected to the input terminal of amplifying circuit, the switching device other end connecting with the tie point on the second receiving coil 202, which is connected to, to be put
The other end input terminal of big circuit, in input terminal one capacitor of series connection of amplifying circuit, it is possible to reduce the influence of switching device is put
Big device output end is electrically connected with processor, and operational amplifier is typically chosen high input impedance, low noise, the operation amplifier of Low Drift Temperature
Device.
The part of path of first receiving coil 201 of the present embodiment and the second receiving coil 202 have it is plane, single layer around
Line geometry structure.Can even more arrange more coil turns in lesser area, the present invention can in lesser area cloth
The number of turns for setting more receiving coils, is connected into the number of turns in circuit in switching device (1'-6') each coil group, in this way can larger model
That encloses is adjusted, and can save the arrangement space of receiving coil the number of turns, can also regulate each adjacent switch dress in advance
For the number of length (the number of turns) and switching device between setting the range and precision that control to adjust, i.e. the accuracy to size of winding is non-
Chang Gao, accurately maximum 25 microns of the steel structure of manufacture does not cause any problem technically on circuit boards.
Sensor of the invention can be advantageously integrated into measuring device.Here, this measuring device can be especially
It is to be configured to handheld metal positioning device, or the metal stationkeeping ability comprising inventive sensor is as additional function.
Additionally can with and advantageously, inventive sensor be also integrated into lathe, be for example integrated into boring bar tool, so as to
Application person is set safely to work using the machine.
The invention allows to the low sensor of cost of implementation, which makes cost as much as possible in the following manner
High component and equipment component becomes extra, i.e. the circuit board of sensor is not only used as the carrier material of electronic circuit, and
It is the whole component part of sensor as funtion part.Sensor according to the present invention for locating metallic objects is only
Need single coil.This is replaced especially by with the conducting wire group on the circuit board of the analysis circuit of sensor as in the prior art
Receiving coil that is disclosed, being typically wrapped around.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to equalization made by scope of the present invention patent
Variation and modification, shall all be covered by the patent of the invention.
Claims (15)
1. a kind of method for being surrounded object in the medium for metal sensor detection, it is characterised in that: measured by analysis
Signal obtains the attribute of besieged object, and receiving coil end generates when the measuring signal is the sensor detecting state
The vector signal C that signal and preset signals obtain after subtracting each other, the preset signals are that sensor receives in the case of not there is no object
The signal that coil-end generates；When the amplitude of the vector signal C is greater than given threshold, to the phase of the vector signal C into
Row analysis, when the phase of the vector signal C is in first phase section, output judges that there are metals in signal display medium
Object, the endpoints thereof in the first phase section is respectively examined object when being magnetic conductivity maximum and the smallest metal of magnetic conductivity
The phase value of vector signal C.
2. according to the method described in claim 1, it is characterized by:
When the amplitude of the vector signal C is greater than given threshold, the phase of the vector signal C is analyzed；
When the phase of the vector signal C is in second phase section, output judges that there are magnetic metals in signal display medium
Object, the endpoints thereof in the second phase section are respectively that examined object is magnetic conductivity maximum and the smallest magnetic gold of magnetic conductivity
The phase value of vector signal C when category；
When the phase of the vector signal C is in third phase section, output judges in signal display medium object to be non magnetic
Metal, the endpoints thereof in the third phase section are respectively that examined object is that magnetic conductivity maximum and magnetic conductivity are the smallest non magnetic
The phase value of vector signal C when metal.
3. the method according to claim 1, it is characterised in that:
Analyze the amplitude variation of vector signal C, first wave peak value and secondary peak value in the amplitude variation of record vector signal C
Place plan-position one and two, using the midpoint information of plan-position one, two as in medium object closest to position believe
Breath output.
4. according to the method described in claim 2, it is characterized by:
Analyze the amplitude variation of vector signal C, first wave peak value and secondary peak value in the amplitude variation of record vector signal C
Place plan-position one and two, using the midpoint information of plan-position one, two as in medium object closest to position believe
Breath output.
5. method according to claim 1 to 4, it is characterised in that: the metal sensor, which has, to be inductively coupled to one another
At least one transmitting coil and at least one receiving coil system, the receiving coil system include be generally aligned in the same plane to
Few first receiving coil and at least one second receiving coil, the transmitting coil form projection, institute on the plane
Stating the region that the first receiving coil is formed on the plane includes the projection, and second receiving coil is in the plane
The region of upper formation is opening-like to be arranged in around the projection, and first and second receiving coil winds arrangement in the same direction, described
First receiving coil and the electrical connection of the second receiving coil.
6. according to the method described in claim 5, it is characterized by: the area that first receiving coil is formed on the plane
Domain all includes the projection.
7. according to the method described in claim 5, the region part that first receiving coil is formed on the plane includes
The projection.
8. according to the method described in claim 5, it is characterized by: the area that second receiving coil is formed on the plane
Domain is one, and the region is looped around around the projection in opening.
9. according to the method described in claim 5, it is characterized by: the area that second receiving coil is formed on the plane
Domain is at least two, and the region is sequentially distributed around the projection.
10. a kind of method for being surrounded object in the medium for metal sensor detection, it is characterised in that: measured by analysis
Signal obtains the location information of besieged object, and is produced from receiving coil end when the measuring signal is the sensor detecting state
The vector signal C that raw signal and preset signals obtains after subtracting each other, the preset signals are not the presence of sensor in the case of object
The signal that receiving coil end generates；
Analyze the amplitude variation of vector signal C, first wave peak value and secondary peak value in the amplitude variation of record vector signal C
Place plan-position one and two, using the midpoint information of plan-position one, two as in medium object closest to position believe
Breath output.
11. according to the method described in claim 10, it is characterized by: the metal sensor have be inductively coupled to one another to
A few transmitting coil and at least one receiving coil system, the receiving coil system includes at least one be generally aligned in the same plane
A first receiving coil and at least one second receiving coil, the transmitting coil form projection on the plane, and described the
The region that one receiving coil is formed on the plane includes the projection, second receiving coil shape on the plane
At region it is opening-like be arranged in around the projection, first and second receiving coil winds arrangement in the same direction, described first
Receiving coil and the electrical connection of the second receiving coil.
12. according to the method for claim 11, it is characterised in that: what first receiving coil was formed on the plane
Region all includes the projection.
13. according to the method for claim 11, it is characterised in that: what first receiving coil was formed on the plane
Region part includes the projection.
14. any method of 1-13 according to claim 1, it is characterised in that: second receiving coil is in the plane
The region of upper formation is one, and the region is looped around around the projection in opening.
15. any method of 1-13 according to claim 1, it is characterised in that: second receiving coil is in the plane
The region of upper formation is at least two, and the region is sequentially distributed around the projection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510455505.1A CN105301665B (en) | 2015-07-29 | 2015-07-29 | A kind of metal sensor and the method for the besieged object in the medium of metal sensor detection |
| PCT/CN2015/087327 WO2017015997A1 (en) | 2015-07-29 | 2015-08-18 | Metal sensor and method for detecting object surrounded by medium using metal sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510455505.1A CN105301665B (en) | 2015-07-29 | 2015-07-29 | A kind of metal sensor and the method for the besieged object in the medium of metal sensor detection |
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| CN105301665A CN105301665A (en) | 2016-02-03 |
| CN105301665B true CN105301665B (en) | 2019-01-01 |
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| CN105182428B (en) * | 2015-07-29 | 2019-01-01 | 金华马卡科技有限公司 | A kind of sensor, for analyte sensors measuring signal method and detection object method |
| CN105182427B (en) * | 2015-07-29 | 2018-12-18 | 金华马卡科技有限公司 | A kind of metal sensor |
| CN105911602B (en) * | 2016-05-03 | 2018-08-21 | 东莞市华盾电子科技有限公司 | A kind of image display method and apparatus of sorting metals |
| CN107831547A (en) * | 2017-09-22 | 2018-03-23 | 永康市卓图工贸有限公司 | The method that a kind of metal detector and metal detector compensate to its detection coil |
| CN107942396A (en) * | 2017-12-08 | 2018-04-20 | 青岛众海汇智能源科技有限责任公司 | Metal detection alignment system and detecting and positioning method |
| FR3075524B1 (en) * | 2017-12-15 | 2020-01-03 | Alessandro Manneschi | DOUBLE TECHNOLOGY DETECTOR WITH TRANSVERSE REELS |
| CN109143382B (en) | 2018-06-19 | 2020-12-08 | 华为技术有限公司 | Detection coil, detection device and detection system |
| CN109557167A (en) * | 2018-10-26 | 2019-04-02 | 东莞市华盾电子科技有限公司 | A kind of scaling method and system of sorting metals detection |
| CN113126168A (en) * | 2019-12-31 | 2021-07-16 | 广东美的白色家电技术创新中心有限公司 | Detection method, device, equipment and storage medium |
| WO2021135092A1 (en) * | 2020-01-04 | 2021-07-08 | 深圳市度彼电子有限公司 | Wall detector, and method employing same to centrally position metal target |
| CN111399069A (en) * | 2020-03-20 | 2020-07-10 | 惠州市迈测科技有限公司 | Metal detection device |
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