CN105301665A - Metal sensor and method for detecting object enclosed in medium therethrough - Google Patents
Metal sensor and method for detecting object enclosed in medium therethrough Download PDFInfo
- Publication number
- CN105301665A CN105301665A CN201510455505.1A CN201510455505A CN105301665A CN 105301665 A CN105301665 A CN 105301665A CN 201510455505 A CN201510455505 A CN 201510455505A CN 105301665 A CN105301665 A CN 105301665A
- Authority
- CN
- China
- Prior art keywords
- receiving coil
- signal
- sensor
- metal
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a method for detecting an object enclosed in a medium through a metal sensor. The method obtains the property and position information of the object through the analysis of a measurement signal, wherein the measurement signal is a vector signal which is the result of the subtraction of a signal, generated by a receiving coil end when the sensor carries out state detection, with a preset signal. The preset signal is a signal generated by the receiving coil end of the sensor under the condition that there is no object. The method can improve the detection sensitivity of the object, cannot form a measurement blind region, and greatly improves the measurement precision.
Description
Technical field
The present invention relates to detection and location field, particularly relate to a metal sensor and detect the method for besieged object in media as well for this metal sensor.
Background technology
Metal detector is mainly used in positioning metallic objects, and existing detector is divided into a lot of classification, is also operated by multiple principle.Such as, its main building block is sensor, sensor is consisted of coil, transmitting coil is used to launch continuous print alternating field, this alternating field is received by receiving coil, relative to transmitting coil, this receiving coil is arranged so that when not having object under test to have an impact, receiving coil produces induced voltage cancel out each other, induced voltage is exported and is close to 0, when having object under test to have an impact, object under test will change original alternating field, more accurate, determinand knows from experience the field producing another alternation, this alternating field can be delivered to receiving coil, and induced voltage is produced on receiving coil, determinand position can be determined by carrying out analysis to it.
fig. 1for sensor construction of the prior art is illustrated
figureits geometry is: receive wire loop 1 and second by two groups reverse first and receive the receiving coil system that wire loop 2 forms, first reception wire loop 1 and the second reception wire loop 2 are arranged coaxially with each other in common plane 3, transmitter coil 4 is positioned at certain distance z place on this common receiver plane 3, and this transmitter coil is same to be received wire loop 1 or second and receive wire loop 2 with first and arrange coaxially.First winding receiving wire loop 1 is such as wound around in a clockwise direction at this, then the second winding receiving wire loop 2 is counterclockwise wound around, therefore the voltage of inducting in these windings have contrary symbol, and compensate one another when there is not outside object when suitably determining size and do not export induced voltage.Following defect is there is: the sensor of (1) the prior art can only be used for detecting the existence of metal, and cannot determine its attribute by this sensor localization object; (2) because transmitting coil produces a very large alternating field, and the counter field that measured object is produced by induction is extremely small, so when detecting the alternating field that extremely faint measured object produces, receiving coil must ignore the alternating field that huge transmitting coil produces, receiving coil and transmitting coil are not existed inductively, in prior art coil layout type, must make the first reception wire loop 1 and second receive wire loop 2 contrary around to, so also must offset the alternating field produced by object, reduce the sensitivity of detection; (3) when determinand is positioned at certain ad-hoc location, the induced voltage responding to the second magnetic field in receiving coil can be in offsets state completely, the blind area of measurement will be formed like this, detection fall short thing, and in fact object exists, that is, exist and measure blind spot or sensitivity most pole low area; (4) due to the coaxial different radii of the first coil second coil, change magnetic flux is mainly realized by change area, in order to arrive compensation in a big way, the semidiameter of 2 coils can not be too little, can only be realized by the size of increasing circuit plate, must circuit board space be taken like this.
Summary of the invention
The present invention is directed to deficiency of the prior art, provide a kind of method detecting besieged object in media as well for metal sensor, by analyzing amplitude and the phase place of receiving coil output signal, determining attribute and the position of measured object.Present invention also offers a kind of metal sensor simultaneously, by arrange have identical around to receiving coil system, the sensitivity to object can be improved, and the blind area of measurement can not be formed, substantially increase the precision of measurement.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
A kind of method detecting besieged object in media as well for metal sensor, attribute and the positional information of besieged object is obtained by analysis to measure signal, the vector signal that the signal that when described measuring-signal is described sensor detected state, receiving coil end produces and preset signals obtain after subtracting each other, described preset signals is the signal that there is not the generation of object situation lower sensor receiving coil end.
Further, when the amplitude of described vector signal C is greater than setting threshold value, the phase place of described vector signal C is analyzed, export when the phase place of described vector C is in first phase interval and judge to there is metal object in Signal aspects medium, the endpoints thereof in described first phase interval is respectively the phase value of vector signal C when examined object is the metal that magnetic permeability is maximum and magnetic permeability is minimum.
Further, when the amplitude of described vector signal C is greater than setting threshold value, analyze the phase place of described vector signal C: export when the phase place of described vector C is in second phase interval and judge to there is magnetic metal object in Signal aspects medium, the endpoints thereof in described second phase interval is respectively the phase value of vector signal C when examined object is the magnetic metal that magnetic permeability is maximum and magnetic permeability is minimum; Export when the phase place of described vector signal C is in third phase interval and judge that in Signal aspects medium, object is nonmagnetic metal, the endpoints thereof in described third phase interval is respectively the phase value of vector signal C when examined object is the nonmagnetic metal that magnetic permeability is maximum and magnetic permeability is minimum.
Further, analyze the amplitude change of vector signal C, first wave peak value in the amplitude change of record vector signal C and planimetric position, Second Wave peak value place one and two, using point midway information the exporting closest to positional information as object in medium of planimetric position one, two.
The invention also discloses a kind of metal sensor, its concrete scheme is as follows:,
A kind of metal sensor, there is at least one transmitting coil inductively and at least one receiving coil system each other, described receiving coil system comprises and is positioned at least one first receiving coil conplane and at least one second receiving coil, described transmitting coil forms projection on the plane, the region that described first receiving coil is formed on the plane comprises described projection, the region that described second receiving coil is formed on the plane is arranged in around described projection, described first receiving coil and the electrical connection of the second receiving coil.
Further, the region that described first receiving coil is formed on the plane all comprises described projection.
Further, the area part that described first receiving coil is formed on the plane comprises described projection.
Further, the region that described second receiving coil is formed on the plane is one, and described region is that split ring is around described projection.
Further, the region that described second receiving coil is formed on the plane is at least two, and described region is distributed in around described projection successively.
Further, the connecting line of described first receiving coil and/or the second receiving coil and/or first and second receiving coil is respectively equipped with 1 output stage.
Further, described first receiving coil is provided with at least 2 output stages, and described second receiving coil is provided with at least 2 output stages.
The present invention obtains following beneficial effect:
(1) by detection method of the present invention, the attribute of tested metal can be located and identify to the vector signal that the signal that analysis receiving coil end produces and preset signals obtain after subtracting each other, to obtain attribute and the positional information of besieged object, well; (2) for the second magnetic field that object produces, due to receiving coil in the same way around to, their produce induction electromotive force mutually superpose, the sensitivity of receiving coil to the magnetic field induction of object can be strengthened, and the blind area of measurement can not be formed, substantially increase the accuracy of measurement; And the first receiving coil and the second receiving coil are arranged on circuit boards, for external coiling receiving coil, the precision with position is very high, more than 0.1mm can be accomplished at present, substantially increase the consistance of product, also better can offset the induced voltage that the first magnetic field produces, arrange and can reduce costs on circuit boards.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Described herein
accompanying drawingbe used to provide a further understanding of the present invention, form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.?
in accompanying drawing:
fig. 1for the structural representation of prior art metal sensor
figure;
fig. 2for the structural representation of a kind of metal sensor embodiment one of the present invention
figure;
fig. 3for the structural representation of a kind of metal sensor embodiment two of the present invention
figure;
fig. 4for the receiving coil system of a kind of metal sensor embodiment one of the present invention correspondence connects signal
figure;
fig. 5for the receiving coil system of a kind of metal sensor embodiment two of the present invention correspondence connects signal
figure;
fig. 6for the principles of construction that a kind of metal sensor of the present invention embodiment one geometry is corresponding
figure;
fig. 7for the principles of construction that a kind of metal sensor of the present invention embodiment two geometry is corresponding
figure;
fig. 8for the detection of a kind of metal sensor embodiment one of the present invention correspondence is illustrated
figure;
fig. 9for the detection of a kind of metal sensor embodiment two of the present invention correspondence is illustrated
figure;
figure 10for the vector of analytical approach of the present invention
figure.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention
accompanying drawing, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on described embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, all belongs to the scope of protection of the invention.
In describing the invention, it is to be appreciated that term " on ", D score, "front", "rear", "left", "right", " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on
accompanying drawing institutethe orientation shown or position relationship are only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
Unless otherwise defined, technical term used herein or scientific terminology should be in field belonging to the present invention the ordinary meaning that the personage with general technical ability understands." first ", " second " that use in patent application specification of the present invention and claims and similar word do not represent any order, quantity or importance, and are only used to distinguish different ingredients.Equally, the similar word such as " " or " " does not represent restricted number yet, but represents to there is at least one.
For all technician in this area, the known fact is that term " field wire " should not understood on literal, this is because to a certain extent, " field wire " only represents the region of same magnetic intensity and polarity more simply.Due to this reason, in the following description of the present invention, this term will be used for representing magnetic density.In order to describe better, only represent coil with a winding.Will readily appreciate that, the present invention regards as its starting point coil and has multiple winding, or coil " printing " onboard.
In the present embodiment, a kind of method detecting besieged object in media as well for metal sensor, concrete detection method is as follows: the attribute and the positional information that are obtained besieged object by analysis to measure signal, the vector signal that the signal that when described measuring-signal is described sensor detected state, receiving coil end produces and preset signals obtain after subtracting each other, described preset signals is the signal that there is not the generation of object situation lower sensor receiving coil end.
When the amplitude of described vector signal C is greater than setting threshold value, the phase place of described vector signal C is analyzed, export when the phase place of described vector C is in first phase interval and judge to there is metal object in Signal aspects medium, the endpoints thereof in described first phase interval is respectively the phase value of vector signal C when examined object is the metal that magnetic permeability is maximum and magnetic permeability is minimum.
Preferably, also further can analyze the phase place of C, thus detect the attribute of tested metal.Specific as follows, when the amplitude of described vector signal C is greater than setting threshold value, analyze the phase place of described vector signal C: export when the phase place of described vector C is in second phase interval and judge to there is magnetic metal object in Signal aspects medium, the endpoints thereof in described second phase interval is respectively the phase value of vector signal C when examined object is the magnetic metal that magnetic permeability is maximum and magnetic permeability is minimum; Export when the phase place of described vector signal C is in third phase interval and judge that in Signal aspects medium, object is nonmagnetic metal, the endpoints thereof in described third phase interval is respectively the phase value of vector signal C when examined object is the nonmagnetic metal that magnetic permeability is maximum and magnetic permeability is minimum.
The detection scheme principle of work of the embodiment of the present invention is as follows: when the amplitude of described vector signal C is greater than setting threshold value, there is no the situation of object in theory, the amplitude of C is 0, also just there is not phase place, but in practice, due to the noise of power supply, the distribution of receiving coil, the noise of discharge circuit, temperature, the impact of humidity etc. factor, vector signal C is made not to be 0, suppose that setting threshold value is W, due to the randomness of noise, so phase place is also uncertain, now namely there is no object, when the amplitude of vector is greater than W, when phase place also satisfies condition, now just thinking has object to exist.
Different circuit parameters, different receiving coil distributions, measures same object, phase place is also different, so after circuit is determined, measures the metal object that magnetic permeability is maximum and magnetic permeability is minimum respectively, and record their phase value, just can obtain metal object and cover phase range.When the amplitude of vector C is greater than W, and phase place is positioned within covered first phase interval range, now just can judge have metal to exist, the endpoints thereof in described first phase interval is respectively the phase value of vector signal C when examined object is the metal that magnetic permeability is maximum and magnetic permeability is minimum; In like manner, measure the magnetic metal that magnetic permeability is maximum and magnetic permeability is minimum respectively, and record their phase value, just can obtain phase range that magnetic metal covers, so when the amplitude of vector C is greater than W, and phase place is positioned within covered second phase interval range, now just can judge the metal existence that is magnetic, the endpoints thereof in wherein said second phase interval is respectively the phase value of vector signal C when examined object is the magnetic metal that magnetic permeability is maximum and magnetic permeability is minimum.In like manner, measure the nonmagnetic metal that magnetic permeability is maximum and magnetic permeability is minimum respectively, and record their phase value, just can obtain phase range that object covers, so when the amplitude of vector C is greater than W, but phase place is positioned within covered third phase interval range, now just can judge have nonmagnetic metal to exist, the endpoints thereof in wherein said third phase interval is respectively the phase value of vector signal C when examined object is the nonmagnetic metal that magnetic permeability is maximum and magnetic permeability is minimum, distinguishing object is thus magnetic metal or nonmagnetic metal, by detection method of the present invention, accurately can draw the attribute of detected material, and precision is high.
Preferably, amplitude by further analysis to measure signal changes, first wave peak value in the amplitude change of record measuring-signal and planimetric position, Second Wave peak value place one and two, using point midway information the exporting closest to positional information as object in medium of planimetric position one, two.
as Figure 10shown in, by metal sensor, when there being object not to be positioned at the below of receiving coil, when receiving coil system is the closer to object, the amplitude of vector C is also larger, and when receiving coil wide thing, the amplitude of vector C is also less; When metal is moved towards receiving coil by receiving coil edge, the amplitude of vector C is changed from small to big, when the amplitude of vector C is unexpected from large to small, the central point of object proximity second receiving coil system is described, is now labeled as the starting point of mid point, 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 the amplitude of vector C is unexpected from large to small, illustrate that object is away from the second receiving coil, is now labeled as the terminal of mid point.Sensor disclosed in the embodiment that in the preferred embodiment, inspected object sensor used preferably will be discussed below.Sensor can not be existed measure blind spot or sensitivity most pole low area by above-mentioned measuring method.
The invention also discloses a kind of sensor, its specific embodiment is as follows:
As embodiments of the invention,
as Fig. 2shown in, the principle greatly simplified
diagramgo out the first embodiment of the sensor geometries of the sensor of the present invention for locating metallic objects.A kind of metal sensor, have a transmitting coil 100 inductively and a receiving coil system 200 each other, the present embodiment is described for a transmitting coil 100 and a receiving coil system 200, but sensor of the present invention does not limit to one.Receiving coil system 200 of the present invention comprises and is positioned at conplane first receiving coil 201 and second receiving coil 202, described transmitting coil 100 forms projection on the plane, the region that described first receiving coil 201 is formed on the plane all comprises described projection, certainly can also be that part comprises described projection, the region that described second receiving coil 202 is formed on the plane is one, and described region is, and split ring is around described projection, and the first receiving coil 201 and the second receiving coil 202 are electrically connected, in like manner receiving coil system 200 does not limit to comprise and is positioned at conplane first receiving coil 201 and second receiving coil 202, its composition can be two or more.
As embodiments of the invention,
as Fig. 3shown in, the principle greatly simplified
diagramgo out the second embodiment of the sensor geometries of the sensor of the present invention for locating metallic objects.A kind of metal sensor, have a transmitting coil 100 inductively and a receiving coil system 200 each other, the present embodiment is described for a transmitting coil 100 and a receiving coil system 200, but sensor of the present invention does not limit to one.Receiving coil system 200 of the present invention comprises and is positioned at conplane first receiving coil 201 and second receiving coil 202, described transmitting coil 100 forms projection on the plane, the region that described first receiving coil 201 is formed on the plane all comprises described projection, certainly can also be that part comprises described projection, the region that described second receiving coil 202 is formed on the plane is two, be respectively the second receiving coil (202', 202 "), described region is distributed in around described projection successively, and the first receiving coil 201 and the second receiving coil (202', 202 ") be electrically connected, in like manner receiving coil system 200 does not limit to comprise and is positioned at conplane first receiving coil 201 and two the second receiving coil second receiving coil (202', 202 "), its composition can be three or more.
In the present embodiment,
as Fig. 3during shown layout, optimum way is the second receiving coil (202', 202 ") group is symmetrical about transmitting coil 100; in various factors such as humidity; temperature, can affect the magnetic field of transmitting coil 100, if become symmetrical; better balance out this impact, certainly asymmetricly also can to realize.In the concrete process implemented, sometimes for improving sensitivity, under the prerequisite of balance maintaining induced voltage, increase receiving coil system as the first receiving coil 201 or the second receiving coil (202,202', 202 " area that the number of turn) and coil comprise, can improve the sensitivity of measuring.
It can be positioned at a distance on this common receiving plane that transmitting coil 100 position of the present embodiment is arranged, and with receiving coil system 200 in being arranged in parallel, printed circuit is provided with at least two hard-wired pilot holes of the described transmitting coil of confession 100, and the pin of transmitting coil 100 is inserted in pilot hole and also welds on circuit boards; Transmitting coil 100 can also be directly arrange that conductor structure on a printed circuit board or embedding are arranged in printed circuit board, these modes can.
First receiving coil 201 of the present invention and the second receiving coil 202 have identical around to, for the connected mode of embodiment one correspondence,
as Fig. 4shown in, the positive pole of the induced voltage of the first receiving coil 201 is connected to the negative pole of the induced voltage of the second receiving coil 202, and the induced voltage of coil is added, in like manner for the connected mode of embodiment two correspondence,
as Fig. 5shown in.Can find out in this connected mode, receiving coil is responded to the induced voltage in the first magnetic field, such connected mode can offset induced voltage again, for the second magnetic field induction voltage be superposition, so the induced voltage in induction first magnetic field can be balanced out, the induced voltage in induction second magnetic field can be increased again, greatly improve the sensitivity of detection.
as Fig. 6 and 7shown in, for the second magnetic field that object produces, induced voltage formula is according to E=n ΔΦ/Δ t, E: induction electromotive force (V), n: number of inductive coil turns, ΔΦ/Δ t: the rate of change of magnetic flux, due to coil in the same way around to, their produce induction electromotive force mutually superpose, so the sensitivity of receiving coil to the magnetic field induction of object can be strengthened, the blind area of measurement can not be formed, substantially increase the accuracy of measurement; And the first receiving coil and the second receiving coil are arranged on circuit boards, for external coiling receiving coil, the precision with position is very high, more than 0.1mm can be accomplished at present, substantially increase the consistance of product, also better can offset the induced voltage that the first magnetic field produces, arrange and can reduce costs on circuit boards.
In the present embodiment,
as Fig. 8shown in,
in figurethe some expression of black be tie point i.e. output stage, be generally can arrange in the beginning of coil and end,
in figurefirst receiving coil 201 generally arranges at least one tie point, if be arranged to a tie point, is then arranged on the starting position of coil, set-point is more, the scope that can calibrate is also larger, generally arranges 3 points and is advisable, and described first receiving coil 201 of corresponding embodiment one is provided with 3 output stages (11,22,33), the location interval of output stage is less, and the precision that can calibrate is higher, being generally approximately is separated by is approximately a circle and is advisable, and interval is consistent.
in figuresecond receiving coil 202 generally arranges at least one tie point, if be arranged to a tie point, then can be arranged on the terminal position of coil, generally arrange about 3 ~ 10, described second receiving coil 202 of corresponding embodiment one is provided with 3 output stages (44, 55, 66), better effect is calibrated for reaching, output stage tie point can be arranged on the position met the following conditions: deposit in case there is no metal, on described second receiving coil spaced furthest output stage between the voltage responded between interval is nearest on the voltage responded to and described first receiving coil 2 output stages substantially equal, or on described first receiving coil spaced furthest output stage between the voltage responded between interval is nearest on the voltage responded to and described second receiving coil 2 output stages substantially equal, the location interval of the tie point on the second receiving coil is less, the precision that can calibrate is higher, the tie point so needed is also more, being generally approximately is separated by is approximately a circle and is advisable, and interval is consistent.
3 output stages (11 on first receiving coil 201,22,33) respectively with switchgear (11 ˋ, 22 ˋ, 33 ˋ) one end electrical connection, the other end of three switchgears is electrically connected with the input end of amplifying circuit 500, and the delivery outlet of amplifying circuit 500 is connected with processor 400, the switchgear of the present embodiment is generally as Mos pipe or triode, the closed and unlatching of processor 400 gauge tap device.The amplifier of the present embodiment generally selects high input impedance, low noise, the operational amplifier of Low Drift Temperature.
In like manner, 3 output stages (44 on second receiving coil 202,55,66) respectively with switchgear (44 ˋ, 55 ˋ, 66 ˋ) one end electrical connection, the other end of three switchgears is electrically connected with the input end of amplifying circuit 500, and the delivery outlet of amplifying circuit 500 is connected with processor 400.
There is not running gear in object situation to be positioned, processor 400 carries out detection storage switch device configuration information to the output signal amplitude of each output stage successively by gauge tap device, and described switchgear configuration information is for comparing each switchgear open and-shut mode information corresponding to the minimum amplitude output signal that filters out to each output signal amplitude; Control each switchgear opening and closing according to described switchgear configuration information, running gear carries out object localization.
Specific implementation process is as follows:
Do not having in object situation, driving transmitting coil 100, producing the magnetic field of alternation, processor 400 detects the amplitude that amplifying circuit 500 outputs signal.
Opening switch device 11 ' and switchgear 44 ', close other switchgear, detects the amplitude A1 that amplifying circuit 500 outputs signal;
Opening switch device 11 ' and switchgear 55 ', close other switchgear, detects the amplitude A2 that amplifying circuit 500 outputs signal;
Opening switch device 11 ' and switchgear 66 ', close other switchgear, detects the amplitude A3 that amplifying circuit 500 outputs signal;
Opening switch device 22 ' and switchgear 44 ', close other switchgear, detects the amplitude B1 that amplifying circuit 500 outputs signal;
Opening switch device 22 ' and switchgear 55 ', close other switchgear, detects the amplitude B2 that amplifying circuit 500 outputs signal;
Opening switch device 22 ' and switchgear 66 ', close other switchgear, detects the amplitude B3 that amplifying circuit 500 outputs signal;
Opening switch device 33 ' and switchgear 44 ', close other switchgear, detects the amplitude C1 that amplifying circuit 500 outputs signal;
Opening switch device 33 ' and switchgear 55 ', close other switchgear, detects the amplitude C2 that amplifying circuit 500 outputs signal;
Opening switch device 33 ' and switchgear 66 ', close other switchgear, detects the amplitude C3 that amplifying circuit 500 outputs signal;
Obtain minimum amplitude, obtain the state of corresponding switchgear, and this state is stored in the nonvolatile memory, when lower task, the state of the direct sense switch from nonvolatile memory of processor 400, substantially increases the sensitivity to object detection; The state of the switchgear of the present embodiment has n*m kind state, and wherein n is the number of the tie point be positioned on the first receiving coil, and m is the number of the tie point be positioned on the second receiving coil.
In the present embodiment,
as Fig. 9shown in, for the device of embodiment two, due to the second receiving coil 202' and the second receiving coil 202 " be substantially symmetrical set, the output terminal of the second receiving coil 202' and the second receiving coil 202 " input end electrical connection, other the same embodiment one above of principle, does not repeat them here.
In a word, the embodiment of the present invention first receiving coil 201 and the second reception line can arrange many coil turns in less area, and at the first receiving coil 201 and the second receiving coil (202,202', 202 " coil diverse location) arranges the output stage be connected with switchgear; can calibrate by carrying out in a big way like this; greatly save space; can increase the switch number of setting; improve degree of regulation; and twocouese calibration can be realized to induced voltage, greatly improve degree of regulation.
In embodiments of the present invention, also comprise analysis circuit, described analysis circuit comprises operational amplifier and processor, and the output stage of the receiving coil system 200 of the embodiment of the present invention can be connected with described analysis circuit by switchgear.Can also directly be connected with described analysis circuit, be described to be connected with described analysis circuit by switchgear below, processor can the unlatching of gauge tap device with closed, the switchgear other end be connected with the tie point on the first receiving coil 201 is connected to the input end of amplifying circuit, the switchgear other end be connected with the tie point on the second receiving coil 202 is connected to the other end input end of amplifying circuit, to connect an electric capacity at the input end of amplifying circuit, the impact of switchgear can be reduced, amplifier out is electrically connected with processor, operational amplifier generally selects high input impedance, low noise, the operational amplifier of Low Drift Temperature.
First receiving coil 201 of the present embodiment and the part of path of the second receiving coil 202 have plane, the coiling geometry of individual layer.Many coil turns can be arranged especially in less area, the present invention can arrange the number of turn of many receiving coils in less area, the number of turn in circuit is connected in switchgear (1'-6') each coil groups, can regulate by carrying out in a big way like this, the arrangement space of the receiving coil number of turn can be saved again, the number that can also regulate length (number of turn) between each adjacent switch device and switchgear in advance carrys out scope and the precision of regulating and controlling, namely the accuracy to size of winding is very high, the steel structure accurately manufacturing maximum 25 microns on circuit boards does not cause any problem technically.
Sensor of the present invention can advantageously be integrated in measuring equipment.At this, this measuring equipment can especially be constructed to handheld metal positioning equipment, or the metal station-keeping ability comprising sensor of the present invention is as additional function.In addition can and advantageously, sensor of the present invention is also integrated in lathe, such as and is integrated in boring bar tool, to enable application person utilize this machine to work safely.
The invention enables and can realize the low sensor of cost, this sensor makes the high parts of cost as much as possible and equipment component become unnecessary in the following manner, namely the circuit board of sensor is not only used as the carrier material of electronic circuit, and is the ingredient of entirety of sensor as funtion part.Sensor for locating metallic objects according to the present invention only needs single coil.This is particularly by replacing the receiving coil disclosed in prior art, be typically wound around by the wire group on the circuit board of the analysis circuit of sensor
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (11)
1. one kind is detected the method for besieged object in media as well for metal sensor, it is characterized in that: the attribute and the positional information that are obtained besieged object by analysis to measure signal, the vector signal that the signal that when described measuring-signal is described sensor detected state, receiving coil end produces and preset signals obtain after subtracting each other, described preset signals is the signal that there is not the generation of object situation lower sensor receiving coil end.
2. method according to claim 1, is characterized in that:
When the amplitude of described vector signal C is greater than setting threshold value, the phase place of described vector signal C is analyzed, export when the phase place of described vector C is in first phase interval and judge to there is metal object in Signal aspects medium, the endpoints thereof in described first phase interval is respectively the phase value of vector signal C when examined object is the metal that magnetic permeability is maximum and magnetic permeability is minimum.
3. method according to claim 2, is characterized in that:
When the amplitude of described vector signal C is greater than setting threshold value, the phase place of described vector signal C is analyzed;
Export when the phase place of described vector C is in second phase interval and judge to there is magnetic metal object in Signal aspects medium, the endpoints thereof in described second phase interval is respectively the phase value of vector signal C when examined object is the magnetic metal that magnetic permeability is maximum and magnetic permeability is minimum;
Export when the phase place of described vector signal C is in third phase interval and judge that in Signal aspects medium, object is nonmagnetic metal, the endpoints thereof in described third phase interval is respectively the phase value of vector signal C when examined object is the nonmagnetic metal that magnetic permeability is maximum and magnetic permeability is minimum.
4., according to the arbitrary described method of claim 1-3, it is characterized in that:
Analyze the amplitude change of vector signal C, the first wave peak value in the amplitude change of record vector signal C and planimetric position, Second Wave peak value place one and two, using point midway information the exporting closest to positional information as object in medium of planimetric position one, two.
5. a metal sensor, there is at least one transmitting coil inductively and at least one receiving coil system each other, described receiving coil system comprises and is positioned at least one first receiving coil conplane and at least one second receiving coil, described transmitting coil forms projection on the plane, it is characterized in that: the region that described first receiving coil is formed on the plane comprises described projection, the region that described second receiving coil is formed on the plane is arranged in around described projection, described first receiving coil and the electrical connection of the second receiving coil.
6. sensor according to claim 5, is characterized in that: the region that described first receiving coil is formed on the plane all comprises described projection.
7. sensor according to claim 5, is characterized in that: the area part that described first receiving coil is formed on the plane comprises described projection.
8. the sensor according to any one of claim 5-7, is characterized in that: the region that described second receiving coil is formed on the plane is one, and described region is that split ring is around described projection.
9. the sensor according to any one of claim 5-7, is characterized in that: the region that described second receiving coil is formed on the plane is at least two, and described region is distributed in around described projection successively.
10. sensor according to claim 8 or claim 9, is characterized in that: the connecting line of described first receiving coil and/or the second receiving coil and/or first and second receiving coil is respectively equipped with 1 output stage.
11. sensors according to claim 8 or claim 9, it is characterized in that: described first receiving coil is provided with at least 2 output stages, described second receiving coil is provided with at least 2 output stages.
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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105301665A true CN105301665A (en) | 2016-02-03 |
| CN105301665B CN105301665B (en) | 2019-01-01 |
Family
ID=55199140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510455505.1A Active 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 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105301665B (en) |
| WO (1) | WO2017015997A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
| CN105182427A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Metal sensor |
| CN105911602A (en) * | 2016-05-03 | 2016-08-31 | 东莞市华盾电子科技有限公司 | Metal classification image display method and device |
| 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 |
| CN109143382A (en) * | 2018-06-19 | 2019-01-04 | 华为技术有限公司 | A kind of detection coil, detection device and detection system |
| CN111399069A (en) * | 2020-03-20 | 2020-07-10 | 惠州市迈测科技有限公司 | Metal detection device |
| CN111713030A (en) * | 2017-12-15 | 2020-09-25 | 亚历山大·曼内斯基 | Dual detector with transverse coils |
| 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 |
| 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031823A (en) * | 2004-09-29 | 2007-09-05 | 罗伯特·博世有限公司 | Sensor for locating metallic objects and method for evaluating measurement signals of a sensor of this type |
| CN101124490A (en) * | 2005-02-21 | 2008-02-13 | 罗伯特·博世有限公司 | Method for the detection of objects enclosed in a medium, and measuring apparatus for carrying out said method |
| US20080297158A1 (en) * | 2007-05-31 | 2008-12-04 | Zircon Corporation | Gradiometric Directional Metal Detector |
| CN101387708A (en) * | 2008-09-22 | 2009-03-18 | 三实电器(漳州)有限公司 | Receiving coil of door type metal detector |
| CN101776770A (en) * | 2010-02-26 | 2010-07-14 | 重庆大学 | Electromagnetic prospecting sending-receiving integration method and device |
| US20100315080A1 (en) * | 2006-10-24 | 2010-12-16 | Andrew Duncan | metal detector |
| CN102298159A (en) * | 2010-06-22 | 2011-12-28 | 上海多科电子科技有限公司 | Metal detector |
| CN102759752A (en) * | 2012-07-25 | 2012-10-31 | 彭磊 | Metal detection device and detection method |
| CN103424779A (en) * | 2012-05-24 | 2013-12-04 | 金华马卡科技有限公司 | Handheld detecting instrument |
| CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
| CN105182427A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Metal sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204832544U (en) * | 2015-07-29 | 2015-12-02 | 金华马卡科技有限公司 | A metal sensor for location |
-
2015
- 2015-07-29 CN CN201510455505.1A patent/CN105301665B/en active Active
- 2015-08-18 WO PCT/CN2015/087327 patent/WO2017015997A1/en active Application Filing
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031823A (en) * | 2004-09-29 | 2007-09-05 | 罗伯特·博世有限公司 | Sensor for locating metallic objects and method for evaluating measurement signals of a sensor of this type |
| CN101124490A (en) * | 2005-02-21 | 2008-02-13 | 罗伯特·博世有限公司 | Method for the detection of objects enclosed in a medium, and measuring apparatus for carrying out said method |
| US20100315080A1 (en) * | 2006-10-24 | 2010-12-16 | Andrew Duncan | metal detector |
| US20080297158A1 (en) * | 2007-05-31 | 2008-12-04 | Zircon Corporation | Gradiometric Directional Metal Detector |
| CN101387708A (en) * | 2008-09-22 | 2009-03-18 | 三实电器(漳州)有限公司 | Receiving coil of door type metal detector |
| CN101776770A (en) * | 2010-02-26 | 2010-07-14 | 重庆大学 | Electromagnetic prospecting sending-receiving integration method and device |
| CN102298159A (en) * | 2010-06-22 | 2011-12-28 | 上海多科电子科技有限公司 | Metal detector |
| CN103424779A (en) * | 2012-05-24 | 2013-12-04 | 金华马卡科技有限公司 | Handheld detecting instrument |
| CN102759752A (en) * | 2012-07-25 | 2012-10-31 | 彭磊 | Metal detection device and detection method |
| CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
| CN105182427A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Metal sensor |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105182427A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Metal sensor |
| WO2017016000A1 (en) * | 2015-07-29 | 2017-02-02 | 金华马卡科技有限公司 | Metal sensor |
| CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
| CN105182427B (en) * | 2015-07-29 | 2018-12-18 | 金华马卡科技有限公司 | A kind of metal sensor |
| CN105911602A (en) * | 2016-05-03 | 2016-08-31 | 东莞市华盾电子科技有限公司 | Metal classification image display method and device |
| 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 |
| CN111713030A (en) * | 2017-12-15 | 2020-09-25 | 亚历山大·曼内斯基 | Dual detector with transverse coils |
| CN111713030B (en) * | 2017-12-15 | 2022-04-12 | 亚历山大·曼内斯基 | Detection method for detecting target object by using double detectors and double detectors |
| CN109143382A (en) * | 2018-06-19 | 2019-01-04 | 华为技术有限公司 | A kind of detection coil, detection device and detection system |
| US11796709B2 (en) | 2018-06-19 | 2023-10-24 | Huawei Technologies Co., Ltd. | Detection coil, detection apparatus, and detection system |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105301665B (en) | 2019-01-01 |
| WO2017015997A1 (en) | 2017-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105301665A (en) | Metal sensor and method for detecting object enclosed in medium therethrough | |
| CN105182428A (en) | Sensor, method for analyzing measurement signal of sensor, and method for detecting object | |
| CN105182427A (en) | Metal sensor | |
| US9021890B2 (en) | Magnetic flowmeter with multiple coils | |
| CN102870013B (en) | Detection of a metal or magnetic object | |
| US8581575B2 (en) | Conductivity sensor with switching between transmitting and receiving coil | |
| CN204832544U (en) | A metal sensor for location | |
| CN102870011B (en) | Metal or the detection of magnetic | |
| US20110089938A1 (en) | Device and Method for the Detection of Electrically Conducting Objects | |
| SE508354C2 (en) | Method and apparatus for determining layer thickness | |
| JP6189870B2 (en) | Penetration coil configuration, test apparatus having penetration coil configuration, and test method | |
| CN101103283A (en) | Sensor for locating metallic objects, and measuring instrument comprising one such sensor | |
| CN108089142A (en) | Detection circuit, method and the electric energy computation chip of bleeder circuit parameter | |
| CN101387708A (en) | Receiving coil of door type metal detector | |
| US20070220947A1 (en) | Method for regulating and monitoring a measuring system, and measuring system itself | |
| CN204945412U (en) | A kind of device for positioning object | |
| CN105445526B (en) | The measurement structure of single cable insulation leakage current under a kind of service condition | |
| CN105182448A (en) | Device for positioning object, and method for positioning object through device | |
| CN205718820U (en) | The probe of a kind of current vortex sensor and current vortex sensor | |
| CN106291431A (en) | A kind of tracking accuracy measuring method of current sensor | |
| CN111781428A (en) | Wireless sensing capacitive equipment dielectric loss live-line testing device | |
| CN100478645C (en) | 8 shaped coil ranging sensor | |
| Zhao et al. | Evaluation Modeling and Improvement Method for Sensitivity of Metal Object Detection in EV Wireless Charging System | |
| CN110988436B (en) | Separation measuring method for zero point and measured point of open-close type current sensor | |
| CN213122122U (en) | Wireless sensing capacitive equipment dielectric loss live-line testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |