CN109557167A - A kind of scaling method and system of sorting metals detection - Google Patents

A kind of scaling method and system of sorting metals detection Download PDF

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Publication number
CN109557167A
CN109557167A CN201811265003.2A CN201811265003A CN109557167A CN 109557167 A CN109557167 A CN 109557167A CN 201811265003 A CN201811265003 A CN 201811265003A CN 109557167 A CN109557167 A CN 109557167A
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calibration object
phase property
metal
receiving coil
phase
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陈英杰
王积东
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Dongguan Huadun Electronic Technology Co Ltd
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Dongguan Huadun Electronic Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means

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Abstract

The invention discloses the scaling methods and system of a kind of detection of sorting metals, wherein this method comprises: metal calibration object does not pass through the induction zone of metal detector receiving coil, transmitting coil emits pumping signal, and receiving coil generates initial signal induced electromotive force y=A cos (ω t)；Metal demarcates object by the induction region of the receiving coil of the metal detector, and the receiving coil nearby generates eddy current effect, and the induced electromotive force for influencing receiving coil generation makes the initial signal y become y '=Ay cos(ωt+q)；Obtain the induced electromotive force variable quantity of the receiving coilExtract phase property valueBy fixed phase property valueIt is associated with the material composition of metal calibration object；By the phase property valueCalibration object phase property table in the metal calibration object material composition information write-in alarm database.The present invention improves the precision of sorting metals detection with technology prejudice is overcome.

Description

A kind of scaling method and system of sorting metals detection
Technical field
The present invention relates to sorting metals fields, in particular to the scaling method and system of a kind of detection of sorting metals.
Background technique
In the enterprises such as raw material smeltery, Metal Processing Factory, to prevent staff in violation of rules and regulations by product in factory or raw material It carries and goes out, common metal detection door can be all installed under normal conditions.Common metal detection door in actual use, also can be to skin Buckle, key, the metal objects on clothes generate induction, and staff carries these every-day objects and can by metal detection door Cause to alarm, what it is because of its indistinguishable detected personnel's carrying is products material or common metal material, so work people Member must will take off through metal detection door all private metal objects with it, and such mode detection efficiency is low, detection essence Exactness is low.
From the angle of enterprise, it is desirable to be able to detect whether staff carries a certain or several forbid carrying Metal is outgoing.In addition, in public security protection occasion, it is also desirable to daily carrying object can be excluded, to doubtful iron force Device, if gun, cutter are alarmed, metal detector always can not detect metal component information.To inspection work belt Carry out inconvenience.It is especially unable to satisfy the purpose of quick security check in the case of large passenger flow, therefore, it is necessary to a kind of new sorting metals inspections Method and apparatus are surveyed to solve this problem.
Existing patent CN101556253A is related to the detection device and method of a kind of hidden metal articles, is related to no metal By when, the induced electromotive force on receiving coil is y1=A1cos (ω t), and when keeping metal, signal y1 becomes y1 ' =A1K1cos (ω t+q0), wherein K1 representation signal amplitude, ω representation signal frequency, K1 represent the information of amount of metal, q0 generation The information of table metal material；By judging that amount of metal and metal material carry out detection judgement classification.However pass through the patented technology It is that scheme is built experiments have shown that as follows: referring to Fig. 1, when same non-ferrous metal article is not over receiving coil, receiving coil Initial signal is y=Acos (ω t)；When same non-ferrous metal article passes through receiving coil, due to the same non-ferrous metal article Different inductive signal y1 ', y2 ', y3 ' are generated on receiving coil when from receiving coil different distance, it can be seen that receive line The amplitude of each inductive signal y ' on circle is different, and phase angle q1, q2, q3 are different, since the same metal material should be Constant, therefore, it can be deduced that: when keeping metal, signal y becomes y '=AK1cos (ω t+q) phase on receiving coil The conclusion that angle q represents the information of metal material is wrong, violation physical phenomenon.Equally, it can also be demonstrate,proved using trigonometric function derivation Bright q is variable, since when metal is by close to receiving coil, eddy current effect occurs and generate in metal, is vortexed Effect acts on the induced electromotive force generated on receiving coilOn the receiving coil finally measured Signal y ' is the signal y that initial signal y and eddy current effect generate induced electromotive forcexThe superposition of the two, i.e.,
Here simplify
That is y '=AK1Cos (ω t+q),
Namely y1 '=A1K1cos (ω t+q0) in existing patent CN101556253A, q and q0 are same physical quantitiess.
It need to be noted that be AxIt is variable, AxSize and metal size and metal and receiving coil away from It may be related from all.A simultaneouslyxIt may causeVariation, that is, the change of y ' amplitude Change, can also causeVariation, that is, the phase q of y ' is variation, namely represents metal with q0 The conclusion of the information of material is wrong, violation physical phenomenon.
A kind of classification of the hand-held resoluble metal detector circuit disclosed in existing patent CN2694270Y to metal It is to carry out discriminatory analysis by obtaining phase.When metal is by receiving coil 11, the output of receiving coil 11 is y '=Acos (ω t+q), output, with frequency and orthogonal signal, is defined as to be homologous with two-way in phase shifter 7
Y2=Bcos (ω t)
Y3=Bcos (ω t+90 °)
The wherein output of multiplier 31 is
The output of multiplier 32 is
Respectively after 41 and 42 low-pass filter, first item AC signal is filtered respectively, and finally output is
Therefore it can be concluded that
Comparator is judged, is only carried out judging phase q with AD conversion+CPU, phase q and existing patent here The phase q0 of y1 '=A1K1cos (ω t+q0) is same physical quantitiess in CN101556253A.
Pass through Fig. 1 experiment and the derivation of equation, it can be appreciated that for same circuit, under same metallic test, receive line The phase angle q of signal y ' on circle is not consistent, is a variable, cannot carry out judgement sorting metals with q.
More than, it can be seen that in the prior art when same metal passes through receiving coil induction zone, what receiving coil generated The phase angle q of induced electromotive force y ' is variable, and the same metal material should be a constant, cannot be made with the phase angle q of variable For the sole criterion for judging constant metal material, physical phenomenon is violated.
Therefore, sorting metals, size, metal quilt by metal measured object are carried out as metal material using phase angle q The influence of object and receiving coil distance is surveyed, the result measured is also variation, and the result precision measured is poor, stability is poor.
Summary of the invention
The present invention provides the scaling methods and system of a kind of detection of sorting metals, overcome when same metal passes through reception When coil-induced area, the phase angle q of induced electromotive force y ' is generated as the technology prejudice for judging metal material using receiving coil, Improve accuracy, the stability of sorting metals.The technical solution is as follows:
On the one hand, a kind of scaling method of sorting metals detection is provided, comprising:
Metal calibration object does not pass through the induction zone of metal detector receiving coil, and transmitting coil emits pumping signal, receives Coil generates initial signal induced electromotive force y=A cos (ω t)；
Metal demarcates object by the induction region of the receiving coil of the metal detector, and the receiving coil nearby generates Eddy current effect, the induced electromotive force for influencing receiving coil generation make the initial signal y become y '=Aycos(ωt+q)；
Obtain the induced electromotive force variable quantity of the receiving coilExtract phase property ValueBy fixed phase property valueIt is associated with the material composition of metal calibration object；
Wherein, A, Ay、AxRepresentation signal amplitude, ω representation signal frequency, the phase of q representation signal y ',Represent induction Electromotive force variable quantity yxPhase；
By the phase property valueCalibration in the metal calibration object material composition information write-in alarm database Object phase property table.
In the present solution, by extracting induced electromotive force variable quantity yxPhase property valueIt is associated with the material of metal calibration object Ingredient is expected, as the Rule of judgment of sorting metals, due to phase property valueIt is not demarcated by the size and metal of metal calibration object The influence of object and receiving coil distance, it is changeless, to improve the stability and precision of sorting metals.
As an improvement of the above scheme, the phase property value of the metal calibration objectIt is that multiple measurement is averaged It arrives.
It further include that datum mark calibration object is obtained for datum mark calibration object to be passed through to the induction region of the receiving coil Its phase property value Z is simultaneously set as phase property datum mark 0.
It further include benchmark module, for calculatingObtain phase of the metal calibration object based on datum mark calibration object Position characteristic value θ；Have in calibration object phase property table in the alarm database phase property value θ, metal calibration object at Divide information.
In improvement project, the transmitting coil based on same hardware detection and identical frequency emits pumping signal, Metal demarcates object by receiving coil, extracts the phase property value of receiving coil induced electromotive force variable quantityWith measured object Material composition association, special metal demarcate the phase property value of objectIt is fixed, but for different receiving coils, Due to the difference on its analog feature, the phase property value of object is demarcated by the metal that different receiving coils measureIt is different , but the difference of the phase property value of the metal calibration object different for same receiving coil two is fixed；Pass through calculatingIt obtains phase property value θ of the metal calibration object based on datum mark calibration object, has unified corresponding different receiving coils Phase property value, unified phase property value are conducive to demarcate the unification and migration of object phase property table.On the other hand, one is provided Kind sorting metals detection system, including
Metal detector and the transmitting coil and receiving coil being provided at its inner portion, and further include
Module is obtained, does not pass through the induction zone of the metal detector receiving coil, transmitting coil for metal calibration object Emit pumping signal, obtains receiving coil and generate initial signal induced electromotive force y=A cos (ω t)；And metal demarcates object By the induction region of the receiving coil of the metal detector, the receiving coil nearby generates eddy current effect, influences to receive The induced electromotive force that coil generates makes the initial signal y become y '=AyCos (ω t+q) obtains signal y1 '；
Phase property obtains module, for obtaining the induced electromotive force variable quantity of the receiving coilExtract phase property valueBy fixed phase property valueObject is demarcated with the metal Material composition association；
Alarm database is used for the phase property valueThe metal calibration object material composition information write-in calibration Object phase property table, and store the calibration object phase property table；
Judgment module judges whether the phase property value R of measured object meets for searching the calibration object phase property table Decision condition in the calibration object phase property table；If meeting the decision condition in calibration object phase property table, issues and doubt Likelihood signal；
Wherein, A, Ay、AxRepresentation signal amplitude, ω representation signal frequency, the phase of q representation signal y ',Represent induction Electromotive force variable quantity yxPhase.
Technical solution provided in an embodiment of the present invention has the benefit that
The induction of signal electromotive force after object passes through is demarcated by initial signal induced electromotive force on receiving coil and metal Difference obtains the variable quantity of induced electromotive force on receiving coil, and the phase of the induced electromotive force variable quantity is fixed constant, no It is influenced by the size and metal calibration object of metal calibration object with receiving coil distance, is associated with metal calibration object material, to The sorting metals of tested metal, overcome technology prejudice, improve the precision of sorting metals detection.
Detailed description of the invention
Fig. 1 is that initial signal, same metal calibration object pass through each inductive signal addition of waveforms display figure of receiving coil；
Fig. 2 is initial signal, metal calibration object by generating induction on the inductive signal and receiving coil of receiving coil The waveform relationship figure of electromotive force variable quantity signal；
Fig. 3 is initial signal, difference of the same metal calibration object when apart from receiving coil different distance, on receiving coil The phasor representation figure of relationship between inductive signal and induced electromotive force variable quantity；
Fig. 4 is that the sorting metals that each embodiment of the present invention provides detect a kind of implementation environment involved in scaling method Environment schematic；
Fig. 5 is that the sorting metals that each embodiment of the present invention provides detect the implementation ring of another kind involved in scaling method The environment schematic in border；
Fig. 6 is a kind of flow diagram for sorting metals detection scaling method that the embodiment of the present invention 1 provides；
Fig. 7 is a kind of flow diagram of the scaling method for sorting metals detection that the embodiment of the present invention 2 provides；
Fig. 8 is a kind of flow diagram of the scaling method for sorting metals detection that the embodiment of the present invention 3 provides；
Fig. 9 is a kind of flow diagram of the scaling method for sorting metals detection that the embodiment of the present invention 4 provides；
Figure 10 is a kind of flow diagram of the scaling method for sorting metals detection that the embodiment of the present invention 5 provides；
Figure 11 is a kind of structural schematic diagram for sorting metals detection system that the embodiment of the present invention 6 provides；
Figure 12 is a kind of structural schematic diagram for sorting metals detection system that the embodiment of the present invention 7 provides.
Figure 13 is a kind of structural schematic diagram for sorting metals detection system that the embodiment of the present invention 8 provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, based on the transmitting coil pumping signal of same hardware detection and identical frequency, receiving coil does not have When having through metal calibration object, the initial signal on receiving coil is y=A cos (ω t), and receiving coil passes through same metal mark When earnest, due to eddy current effect, the initial signal y on receiving coil becomes y '=AyCos (ω t+q), by the metal mark Between earnest and receiving coil the distance of distance and the metal calibration object product size influence, repeatedly measure y '= { y1 ', y2 ' ... yn ' }, n >=1 (the inductive signal waveform of y4 ', y5 ' ... yn ' are not shown in Fig. 1), eddy current effect to receive The induced electromotive force variable quantity generated on coil is
Induced electromotive force y1 '=A of each signal generated on receiving coily1Cos (ω t+q1), y2 '=Ay2cos(ω T+q2) ... yn '=AynCos (ω t+qn) is different, amplitude Ay1, Ay2…AynDifference, phase angle q={ q1, q2...qn }, n >= 1 is different, and the waveform of each inductive signal y1 ', y2 ' ... yn ' and initial signal y by oscillograph Overlapping display or pass through emulation Overlapping display, necessarily intersect at least D1, D2 of two o'clock in one cycle and the intersection point D1, D2 be it is fixed, not by metal Demarcate the influence of the distance of distance and metal calibration object product size between object and receiving coil.Each inductive signal y1 ', Y2 ' ... yn ' meets at different points from abscissa, illustrates that q is variable, with for inductive signal y1 ', y2 ', y3 ' (referring to figure 1) different points, are met at from abscissa respectively, phase q1, q2, q3 represent different values.
Referring to fig. 2, inductive signal y1 ' and initial signal y intersect at D1, D2 point, then the inductive signal y1 ' on D1, D2 point Induced electromotive force and the function amplitude of both induced electromotive forces of initial signal y it is necessarily equal, the induction electric on D1, D2 point Gesture variable quantityIndicate that corresponding to D1, D2 point receiving coil incudes The signal waveform y of electromotive force variable quantityx1E1, E2 point are met at abscissa, that is, corresponds to the induction electric of D1, D2 point receiving coil Gesture variable quantity is zero；Similarly, inductive signal y2 ' ... yn ' and initial signal y intersect at D1, D2 point, correspond to D1, D2 point and receive The signal waveform y of coil-induced electromotive force variable quantityx1E1, E2 point are met at abscissa, that is, corresponds to D1, D2 point receiving coil Induced electromotive force variable quantity be zero；That is pass through intersection point D1, D2 of initial signal y and inductive signal y1 ', y2 ' ... yn ' Induced electromotive force variable quantity y can be obtainedxPhaseAnother way, any two sense The difference of the induced electromotive force of induction signal y ' can get induced electromotive force variable quantity yx, such as yx={ yx1=y2 '-y1 ', yx2= y3′-y1′...yxn=y (n+1) ' mono- yn ' }, induced electromotive force variable quantity can be obtained in n >=1, the i.e. intersection point of y1 ', y2 ' ... yn ' yxPhase
To sum up, the same metal demarcates object, and when from receiving coil different distance and the metal demarcates object product When of different sizes, receiving coil obtains induced electromotive force y1 ', y2 ' ... the yn ' of different inductive signals and the induced electricity of initial signal Kinetic potential y is subtracted each other respectively, the induced electromotive force variable quantity y of acquisitionx1…yxn, phaseIt is identical value, and solid It is fixed constant, same metal material can be represented, is underrange with variable q, the numerical value of representative, meaning are different.It is possible thereby to adopt With induced electromotive force variable quantity yxPhase property valueIt is associated with the material composition of metal calibration object to carry out metal point Class.
Referring to Fig. 3, same metal calibration object is embodied using phasor representation method when from receiving coil different distance, is received Initial signal y, different inductive signal y1 '=A on coily1Cos (ω t+q1), y2 '=Ay2Cos (ω t+q2) and whirlpool Flow the induced electromotive force variable quantity signal that effect generates Between relationship, it can be seen that With on receiving coil signal y ' with same metal calibration object different and different, the amplitude A at a distance from receiving coily1、Ay2No Together, phase angle q1, q2 is different, but the induced electromotive force variable quantity signal y that eddy current effect generatesx1、Yx2Amplitude Ax1、Ax2Difference, PhaseIt is identical, and immobilizes, it is possible thereby to using induced electromotive force variable quantity yxPhase property valueIt is associated with the material composition of metal calibration object to carry out sorting metals.
Metal detector of the present invention includes passing through formula detector 400 or hand-held detector 500.
It is that the sorting metals that each embodiment of the present invention provides detect a kind of implementation involved in scaling method with reference to Fig. 4 The environment schematic of environment.It include main structure by formula detector 400, transmitting coil 401, receiving coil 402, host is (not It shows).Host sends pumping signal to transmitting coil 401, receiving coil 402 receives the letter of transmitting coil 401 for controlling Number.
It is that the sorting metals that each embodiment of the present invention provides detect another kind involved in scaling method in fact with reference to Fig. 5 Apply the environment schematic of environment.Hand-held detector 500 includes main structure, transmitting coil 501, receiving coil 502, host 503.Host 503 sends pumping signal to transmitting coil 501, receiving coil 502 receives the letter of transmitting coil 501 for controlling Number.
It is a kind of flow diagram for sorting metals detection scaling method that the embodiment of the present invention 1 provides referring to Fig. 6.It should Method includes the following steps:
Step S101: metal calibration object does not pass through the induction zone of metal detector receiving coil, transmitting coil transmitting excitation Signal, receiving coil generate initial signal induced electromotive force y=A cos (ω t).
Specifically, the mode that the automations such as manipulator can be used replaces artificial behaviour during metal calibration object calibration Make, by metal calibration object by the induction region of the receiving coil of metal detector, fast and accurate effect can be played.It connects The induction region of take-up circle refers to that measured object can influence the region of the induced electromotive force of receiving coil generation, detects by formula In device 400, metal calibration object is passed through to the sense channel of detector receiving coil 402.It, will be golden in hand-held detector 500 Belong to calibration object and passes through 502 induction region of receiving coil.
Step S102: metal demarcates object and passes through the induction region of the receiving coil of the metal detector, the reception line Circle nearby generates eddy current effect, and the induced electromotive force for influencing receiving coil generation makes the initial signal y become y '=Ay cos(ωt+q)。
According to Maxwell's Theory of Electromagnetic Field, emit pumping signal from transmitting coil, by aerial propagation, receiving coil Have induced current and induced electromotive force.Particularly, when there is the meeting near transmitting coil or receiving coil of other metal parts Eddy current effect is generated, to influence the induced current and induced electromotive force of the generation of receiving coil 402,502.
Step S103: the induced electromotive force variable quantity of the receiving coil is obtained Extract phase property valueBy fixed phase property valueWith the material of metal calibration object Ingredient association；Wherein, A, Ay、AxRepresentation signal amplitude, ω representation signal frequency, the phase of q representation signal y ',Represent induction Electromotive force variable quantity yxPhase.
It optionally, can be by metal when demarcating two receiving coils 402 of corresponding second coil group 403 of metal calibration object The space that calibration object is surrounded by dotted line shown in Fig. 4, alternatively, obtaining and appointing when calibration metal calibration object is by receiving coil 502 Anticipate two waveform y ' induced electromotive force make the difference obtain induced electromotive force variable quantity yxTo extract proper phase value
Aforementioned verified phase property valueA fixed value, same metal calibration object by receiving coil 402, When 502, not by metal calibration object with a distance from receiving coil 402,502, metal calibration object own vol size influenced, because This, special metal demarcates the phase property value of objectIt can be used as the foundation of the material composition Classification and Identification of measured object.
Step S104: by the phase property valueAlarm database is written in the metal calibration object material composition information In calibration object phase property table.
In this step, when measured object passes through the induction zone of receiving coil 202,302, the phase property value of measured object is extracted R searches the calibration object phase property table, judges whether the phase property value R of measured object meets the calibration object phase property Decision condition in table；If meeting the decision condition in calibration object phase property table, doubtful signal is issued.
Referring to Fig. 7, a kind of flow diagram of the scaling method for sorting metals detection that the embodiment of the present invention 2 provides.It should Method includes the following steps:
Step S111: metal calibration object does not pass through the induction zone of metal detector receiving coil, transmitting coil transmitting excitation Signal, receiving coil generate initial signal induced electromotive force y=A cos (ω t).
Specifically, the mode that the automations such as manipulator can be used replaces artificial behaviour during metal calibration object calibration Make, by metal calibration object by the induction region of the receiving coil of metal detector, fast and accurate effect can be played.It connects The induction region of take-up circle refers to that measured object can influence the region of the induced electromotive force of receiving coil generation, detects by formula In device 400, metal calibration object is passed through to the sense channel of detector receiving coil 402.It, will be golden in hand-held detector 500 Belong to calibration object and passes through 502 induction region of receiving coil.
Step S112: datum mark metal calibration object, setting M congener metal calibration objects pass through the metal respectively and visit The induction region of the receiving coil of device is surveyed, the receiving coil nearby generates eddy current effect, influences the induction of receiving coil generation Electromotive force makes the initial signal y become y0 '=Ay0Cos (ω t+q0), the initial signal y become y '=y1 ', Y2 ' ... yM ' }, M >=1.
According to Maxwell's Theory of Electromagnetic Field, emit pumping signal from transmitting coil, by aerial propagation, receiving coil Have induced current and induced electromotive force.Particularly, when there is the meeting near transmitting coil or receiving coil of other metal parts Eddy current effect is generated, to influence the induced current and induced electromotive force of the generation of receiving coil 402,502.
Step S113: the induced electromotive force variable quantity of datum mark metal calibration object on the receiving coil is obtained respectivelyThe M induced electromotive force variable quantities with type of metal calibration objectWith extraction phase property value
The metal calibration object is equipped with M, then, m metal calibration object phase property value is expressed asM >=m, M, m It is greater than 1 natural number, demarcating to record simultaneously in object phase property table has phase property value The composition information of metal calibration object.
Step S114: by the phase property value of datum mark calibration objectAs phase property datum mark 0, willWith θ1, θ2...θMMiddle minimum value and maximum value are set as this kind Metalloid demarcates phase property value range of the object based on datum mark metal calibration object.
Step S115: by the described type of metal calibration object based on datum mark metal calibration object phase property value range, And the calibration object phase in the described type of metal calibration object material composition information write-in alarm database being associated is special Levy table.
In this step, when measured object passes through the induction zone of receiving coil 402,502, the phase property value of measured object is extracted R searches the calibration object phase property table, judges whether the phase property value R of measured object meets and demarcates object in the type of metal Decision condition in range；If meeting the decision condition in calibration object phase property table, doubtful signal is issued.
Specifically, point calibration object on the basis of red copper, phase property value of the measured object based on red copper is 30 °, it is known that calibration object It is 10 ° to 80 ° that phase property value of the iron class based on red copper calibration object is stored in phase property table, then it is assumed that measured object meets iron The decision condition of class, and issue doubtful signal.Through the above scheme, doubtful article can be screened first, further checked, mentioned The efficiency that height checks.
Referring to Fig. 8, a kind of flow diagram of the scaling method for sorting metals detection that the embodiment of the present invention 3 provides.It should Method includes the following steps:
Step S121: metal calibration object does not pass through the induction zone of metal detector receiving coil, transmitting coil transmitting excitation Signal, receiving coil generate initial signal induced electromotive force y=A cos (ω t).
Specifically, the mode that the automations such as manipulator can be used replaces artificial behaviour during metal calibration object calibration Make, by metal calibration object by the induction region of the receiving coil of metal detector, fast and accurate effect can be played.It connects The induction region of take-up circle refers to that measured object can influence the region of the induced electromotive force of receiving coil generation, detects by formula In device 400, metal calibration object is passed through to the sense channel of detector receiving coil 402.It, will be golden in hand-held detector 500 Belong to calibration object and passes through 502 induction region of receiving coil.
Step S122: datum mark metal calibration object, the first datum mark metal calibration object, metal calibration object pass through described respectively The induction region of the receiving coil of metal detector, the receiving coil nearby generate eddy current effect, influence receiving coil generation Induced electromotive force make the initial signal y become y0 '=Ay0Cos (ω t+q0), the initial signal y become y1 '= Ay1Cos (ω t+q1), the initial signal y become y '=Ay cos(ωt+q)。
Step S123: the induced electromotive force variable quantity of the receiving coil is obtained
Extract phase property valueBy fixed phase property valueWith the material of datum mark metal calibration object Ingredient association, by fixed phase property valueIt is associated with the material composition of the first datum mark metal calibration object, by fixed phase Position characteristic valueIt is associated with the material composition of metal calibration object.
Aforementioned verified phase property valueA fixed value, same metal calibration object by receiving coil 402, When 502, not by metal calibration object with a distance from receiving coil 402,502, metal calibration object own vol size influenced, because This, special metal demarcates the phase property value of objectIt can be used as the foundation of the material composition Classification and Identification of measured object.
Step S124: by phase property valueAs phase property datum mark 0, by phase property valueAs The first datum mark of phase property calculatesIt obtains phase property value θ of the metal calibration object based on datum mark calibration object, calculates Z-S obtains the difference of the phase property value of datum mark calibration object phase property value and the first datum mark calibration object, calculates θ+Z-S and obtains Metal demarcates phase property value of the object based on the first datum mark out.Step S125: phase property value Z, β, θ, θ+Z- β is written and is reported Calibration object phase property table in alert database, or/and the phase property value of datum mark calibration object and the first datum mark are demarcated Calibration object phase property in the difference Z-S write-in alarm database of the phase property value of object；And corresponding phase characteristic value Z, The material composition information write-in of datum mark calibration object, the first datum mark calibration object, metal calibration object that S, θ, θ+Z-S are respectively associated Calibration object phase property table in alarm database.
Transmitting coil 401,501 pumping signals such as 5360Hz based on same hardware detection and identical frequency, phase Position characteristic valueRelated to the material composition of measured object, therefore, special metal demarcates the phase property value of objectBe it is fixed, But for different receiving coils 402,502, due to the difference on its analog feature, by different receiving coils 402, 502, the phase property value of the metal calibration object of measurementIt is different, but for same receiving coil 402,502, two are not The difference of the phase property value of same metal calibration object is fixed.Specifically, two are not for same receiving coil 402,502 The difference that the phase property value of same metal calibration object is is fixed.For example, it is equipped with red copper calibration object and stainless steel calibration object, it will The induction region of its receiving coil 402,502 for passing through metal detector respectively show that red copper calibration object and stainless steel demarcate object Phase property value can also obtain its difference, e.g. 34 °, by the calibration object phase property table of this data write-in alarm database. It should be understood that red copper demarcate object and stainless steel demarcate object metal detector by way of it is consistent, transmitting coil 401,501 Exciting signal frequency and receiving coil 402,502 are identical.By above-mentioned calibration mode, it can deduce and be carried out in other receiving coils When detection, as long as the phase property value of stainless steel calibration object can be judged for S=- with the phase property value of red copper calibration object for 0 34 °, above scheme increases the transportable property of experimental data.For another example, it is known that red copper demarcates the phase of object and stainless steel calibration object Feature difference is Z-S=34 °, and phase property value θ of the iron class based on red copper calibration object is 10 ° to 80 °, can calculate iron class and be based on not The phase property value θ+Z-S that the steel that becomes rusty demarcates object is that object phase property tables are demarcated in 44 ° to 114 ° write-ins.
By the above-mentioned means, the phase property difference and measured object of object can be demarcated by known any two datum mark Based on the phase property value of one of datum mark calibration object, deduce that phase of the measured object based on another datum mark calibration object is special Value indicative.Further, if, it is known that first datum mark calibration object demarcates the phase property difference of object with second datum mark, Simultaneously it is also known that the phase property difference of second datum mark calibration object and third datum mark calibration object, can deduce first base The phase property difference of calibration object and third datum mark calibration object on schedule.It should be understood that said reference point calibration object passed through The mode of metal detector is consistent, and the exciting signal frequency of transmitting coil is identical as receiving coil.By demarcating object phase property The form of table saves, and is applied to each metal detector, can greatly save debugging and nominal time.
Referring to Fig. 9, a kind of flow diagram of the scaling method for sorting metals detection that the embodiment of the present invention 4 provides.It should The scaling method of sorting metals detection includes the following steps:
Step S121 ': metal calibration object does not pass through the induction zone of metal detector receiving coil, transmitting coil transmitting excitation Signal, receiving coil generate initial signal induced electromotive force y=A cos (ω t).In the present embodiment, metal detector includes connecing Take-up circle and the first receiving coil.
Step S122 ': datum mark calibration object is passed through to the sense of the induction region and the first receiving coil of receiving coil respectively Region is answered, receiving coil generates induced electromotive force and initial signal y is made to become signal y '0, the first receiving coil generation induced electricity Kinetic potential makes initial signal y become signal yα′.Step S123 ': receiving coil induced electromotive force variable quantity is obtainedExtract stationary phase characteristic valueWith the material of datum mark calibration object Expect that ingredient is related；Obtain the first receiving coil induced electromotive force variable quantity Extract stationary phase characteristic valueIt is related to the datum mark calibration material composition of object.
Transmitting coil 401,501 pumping signals such as 5360Hz based on same hardware detection and identical frequency, phase Position characteristic valueRelated to the material composition of measured object, therefore, special metal demarcates the phase property value of objectBe it is fixed, But for different receiving coils 402,502, due to the difference on its analog feature, by different receiving coils 402, 502, the phase property value of the metal calibration object of measurementIt is different.In the present embodiment, same datum mark calibration object is by connecing When take-up circle and first two different receiving coils of receiving coil, the phase property value of the datum mark calibration object measuredWithIt is different.
Step S124 ': by phase property valueThe phase for corresponding to receiving coil as datum mark calibration object is special Value indicative, by phase property valueThe phase property value for corresponding to the first receiving coil as datum mark calibration object, calculates First receiving coil corresponds to the correction value of the receiving coil
In this step, phase property value obtained when by datum mark calibration object by the first receiving coilBy repairing Positive value Y-Z show that datum mark calibration object passes through the consistent data of phase property value obtained when receiving coil, that is, has unified pair Answer the phase property value of different receiving coils.Step S125 ': by phase property value Z, Y and correction value Y-Z and calibration object is written Phase property table.
It should be understood that on the one hand, correction value is used to correct the difference that phase property detects between two coil links, i.e., After the amendment for carrying out Y-Z by the test result to the first receiving coil, the first receiving coil can be regarded as has and reception The coil of the identical phase property detection performance of coil, due to same metal detector multiple receiving coils analog feature not Together, correction value Y-Z realizes bench mark correction.Phase obtained when on the other hand, for object will be demarcated by the first receiving coil Position characteristic value, can be modified by correction value, obtained and passed through phase property value obtained when receiving coil with calibration object Consistent data have unified the phase property value of corresponding different receiving coils.Unified phase property value is conducive to demarcate object The unification and migration of phase property table.Referring to Figure 10, a kind of scaling method for sorting metals detection that the embodiment of the present invention 5 provides Flow diagram.The scaling method of sorting metals detection is based on embodiment 3, the difference is that, step S124 and step Following steps are also set up between rapid S125:
Datum mark calibration object: being passed through the induction region of the first receiving coil by step S122 ", and receiving coil generates induced electricity Kinetic potential makes initial signal y become signal yβ′。
Step S123 ": induced electromotive force variable quantity is obtainedIt mentions Take stationary phase characteristic valueIt is related to the datum mark calibration material composition of object.
Step S124 ": the phase shifter that adjustment is connect with the first receiving coil makes metal calibration object pass through the receiving coil It is identical by the phase property value detected when the first receiving coil with metal calibration object, i.e.,
Step S125 ": by the corresponding phase property value of the first receiving coilWrite-in calibration object phase Mark sheet.
In practical application, consider that there is the case where multiple receiving coils on the same metal detector, due to receiving coil And the otherness of its analog circuit, the phase property value of object is demarcated by the metal that different receiving coils measureIt is different , it needs to record data to each receiving coil, the number of corresponding receiving coil is recorded in phase property table, such as: there is N A receiving coil, m metal are demarcated object by data measured by n-th of receiving coil, be can recorde as phase property value
The present embodiment is to have the case where multiple receiving coils on the same metal detector, it is understood that is a gold Belonging to detector includes receiving coil, another metal detector includes the first receiving coil.Adjust the shifting in the first receiving coil Phase device makes metal calibration object pass through the phase that detects when the first receiving coil by the receiving coil and metal calibration object Characteristic value is identical.The control of phase shifter suspension control signal, the signal can be issued by host, and tester can move up by adjusting host Phase parameter further controls phase shifter work.In addition, the mode about adjustment phase shifter phase shift size, can also pass through manual side Formula adjusts the size of the potentiometer of phase shifter to control the phase shift size of phase shifter, until metal calibration object is by receiving line Circle and metal calibration object are identical by the phase property value detected when the first receiving coil.Pass through above-mentioned phase shifter amendment side First receiving coil can be regarded as the coil with phase property detection performance identical with receiving coil, be conducive to phase by formula The compatibility and uniformity of position mark sheet data, convenient for migrating or solving same metal detector in different metal detector There is the analog feature difference of multiple receiving coil links to lead to the skimble-scamble problem of phase property value.
Referring to Figure 11, a kind of structural schematic diagram for sorting metals detection system that the embodiment of the present invention 6 provides.The system packet The receiving coil 701 of metal detector is included, module 702 is obtained, phase property value acquisition module 703, alarm database 704, sentences Disconnected module 705 and alarm module 706.
The acquisition module 702 does not pass through the induction zone of the metal detector receiving coil, transmitting for metal calibration object Coil transmissions pumping signal obtains receiving coil and generates initial signal induced electromotive force y=A cos (ω t)；And metal mark Earnest passes through the induction region of the receiving coil of the metal detector, and receiving coil 702 nearby generates eddy current effect, influences to connect The induced electromotive force that take-up circle generates makes the initial signal y become y '=AyCos (ω t+q) obtains signal y '.
The phase property obtains the induced electromotive force variable quantity that module 703 is used to obtain the receiving coilExtract phase property valueBy fixed phase property valueObject is demarcated with the metal Material composition association；Wherein, A, Ay、AxRepresentation signal amplitude, ω representation signal frequency, the phase of q representation signal y ',Generation Table induced electromotive force variable quantity yxPhase.
The alarm database 704 is used for the phase property valueThe metal calibration object material composition information write-in Object phase property table is demarcated, and stores the calibration object phase property table.
The judgment module 705 for searching the calibration object phase property table, judge measured object phase property value R whether Meet the decision condition in the calibration object phase property table；If meeting the decision condition in calibration object phase property table, send out Doubtful signal out.
The alarm module 706 is for reminding staff to check manually after receiving doubtful signal.The mode of prompting Be it is various, by display screen show exception symbol, can show simultaneously closestThe metal of value demarcates object composition information, leads to It crosses loudspeaker and gives a warning sound, pass through light flash.X-ray machine or visual inspection mode can be used in manual type inspection.
Sorting metals detection system provided in an embodiment of the present invention obtains metal detector reception by obtaining module 702 The induced electromotive force of the two is subtracted each other the sense for obtaining signal on receiving coil by 701 initial signal y and inductive signal y ' on coil Electromotive force variable quantity is answered, phase property obtains the phase property value that module 703 extracts induction of signal electromotive force variable quantityOr Person, when metal passes through receiving coil 701, the induced electromotive force of any two inductive signal y ' subtracts each other the induced electromotive force of acquisition Variable quantity, phase property obtain module extract signal yxThe phase property value of induced electromotive force variable quantityBased on same The transmitting coil pumping signal of hardware detection and identical frequency, induced electromotive force variable quantity on metal detector receiving coil Phase property valueBe it is fixed, by the phase property valueThe metal calibration object material composition information write-in mark Earnest phase property table, and the calibration object phase property table is stored, judgment module 705 obtains module 703 according to phase property The phase property value R of the measured object of acquisition is got the bid with alarm database 705 compared with the inquiry of earnest phase property table, meets calibration object The data of phase property table are prestoring the data in range, send doubtful signal and alarm to alarm module 706.
Referring to Figure 12, a kind of structural schematic diagram for sorting metals detection system that the embodiment of the present invention 7 provides.The present embodiment Based on embodiment 6, the difference is that further including a benchmark module 707, it is separately connected phase property and obtains module 703 and judgment module 705；Receiving coil 701 includes n (n >=2) receiving coils 7011,7012 ... 701n, obtains module 702 Module 7021,7022 ... 702n are obtained including n (n >=2)；First receiving coil 7011 and first obtains module 7021, phase Feature obtains module 703 and is sequentially connected with, and the second receiving coil 7012 and second obtains module 7022, phase property obtains module 703 are sequentially connected with, and so on, the n-th receiving coil 701n and n-th obtains module 702n, phase property obtains module 703 sequentially Connection forms the analog link of n receiving coil.
The benchmark module 707 is used to pass through datum mark calibration object the induction region of the receiving coil, obtains it Phase property value Z is simultaneously set as phase property datum mark 0, and/or for calculatingShow that metal calibration object is based on datum mark The phase property value θ of object is demarcated, has phase property value θ, metal calibration in the calibration object phase property table in alarm database The composition information of object；And/or for according in calibration object phase property table, datum mark to demarcate the phase property value and the first base of object The phase property value of difference Z-S, metal calibration object based on datum mark calibration object for demarcating the phase property value of object on schedule is θ, meter Calculate phase property value θ+Z-S of the metal calibration object based on the first datum mark calibration object.
Transmitting coil 401,501 pumping signals such as 5360Hz based on same hardware detection and identical frequency, phase Position characteristic valueRelated to the material composition of measured object, therefore, special metal demarcates the phase property value of objectBe it is fixed, But for different receiving coils 402,502, due to the difference on its analog feature, by different receiving coils 402, 502, the phase property value of the metal calibration object of measurementIt is different, but for same receiving coil 402,502, two are not The difference of the phase property value of same metal calibration object is fixed.
Specifically, the difference that the phase property value of two different metal calibration objects is is fixed for same receiving coil 's.For example, being equipped with red copper calibration object and stainless steel calibration object, it is passed through to the induction zone of the receiving coil of metal detector respectively Domain show that red copper calibration object and stainless steel demarcate object phase property value, can also obtain its difference, e.g. 34 °, this data is write Enter the calibration object phase property table of alarm database.It should be understood that the metal that red copper calibration object and stainless steel calibration object pass through is visited The mode for surveying device is consistent, and the exciting signal frequency of transmitting coil is identical with receiving coil.By above-mentioned calibration mode, can deduce When other receiving coils are detected, as long as being Z=0 with the phase property value of red copper calibration object, stainless steel mark can be judged The phase property value of earnest is S=-34 °, and above scheme increases the transportable property of experimental data.For another example, it is known that red copper calibration The phase property difference of object and stainless steel calibration object is Z-S=34 °, and phase property value of the iron class based on red copper calibration object is that θ is 10 ° to 80 °, can calculate phase property value θ+Z-S of the iron class based on stainless steel calibration object is that object phase is demarcated in 44 ° to 114 ° write-ins Mark sheet.Sorting metals detection system provided in an embodiment of the present invention, can be according to known gold by benchmark module 707 The phase property value for belonging to calibration object calculates the phase property value of other metals calibration object, increases the transportable property of experimental data.
By the above-mentioned means, the phase property difference and measured object of object can be demarcated by known any two datum mark Based on the phase property value of one of datum mark calibration object, deduce that phase of the measured object based on another datum mark calibration object is special Value indicative.Further, if, it is known that first datum mark calibration object demarcates the phase property difference of object with second datum mark, Simultaneously it is also known that the phase property difference of second datum mark calibration object and third datum mark calibration object, can deduce first base The phase property difference of calibration object and third datum mark calibration object on schedule.It should be understood that said reference point calibration object passed through The mode of metal detector is consistent, and the exciting signal frequency of transmitting coil is identical as receiving coil.By demarcating object phase property The form of table saves, and is applied to each metal detector, can greatly save debugging and nominal time.
In the present embodiment, same metal calibration object passes through the induction region of the second receiving coil 7012, and phase property obtains Module 703 obtains phase property valueAs the phase property value of datum mark calibration object, same metal calibration object passes through The induction region of first receiving coil 7011, phase property obtain module 703 and obtain metal calibration object corresponding to the first reception line The phase property value of circleBenchmark module 707 is also used to calculate the first receiving coil 7011 and receives corresponding to second The correction value of coil 7012On the one hand, it should be understood that the first receiving coil 7011 connects with second Take-up circle 7012 may belong to same metal detector or be belonging respectively to different metal detectors.Correction value is for correcting two The difference that phase property detects between a coil link carries out the amendment of Y-Z by the test result to the first receiving coil Afterwards, the first receiving coil 7011 can be regarded as to the line with phase property detection performance identical with the second receiving coil 7012 Circle, as a result, since the analog feature of multiple receiving coils of same metal detector is different, the realization pair of benchmark module 707 Its bench mark correction.Phase property value obtained when on the other hand, for that will demarcate object by the first receiving coil 7011, can To be modified by correction value, obtain consistent by phase property value obtained when the second receiving coil 7012 with calibration object Data, that is, unified the phase property value of corresponding different receiving coils, unified phase property value is conducive to demarcate object phase The unification and migration of mark sheet.
Optionally, M of a sort metals are equipped with and demarcate object, m-th of phase of the metal calibration object based on datum mark calibration object The position list of feature values is shown as θm, the of a sort metals calibration objects of M obtain induced electromotive force variable quantity by receiving coil induction zone The phase property value extracted respectively is expressed as θ={ θ1, θ2…θM, wherein M, m are greater than 1 natural number, M >=m.By metal mark The minimum value of phase property value of the earnest based on datum mark calibration object is set as metalloid calibration object to maximum value and is based on benchmark The phase property value range of point calibration object.
Referring to Figure 13, a kind of structural schematic diagram for sorting metals detection system that the embodiment of the present invention 8 provides.The present embodiment Based on embodiment 6, the difference is that further including phase shifter 708, receiving coil 701 includes n (n >=1) receiving coils 7011,7012 ... 701n, obtaining module 702 includes n (n >=1) acquisitions modules 7021,7022 ... 702n, and phase shifter 708 includes N (n >=1) phase shifters 7081,7082 ... 708n；First receiving coil 7011, first obtains module 7021, the first phase shifter 7081, which obtain module 703 with phase property, is sequentially connected with, and the second receiving coil 7012, second obtains module 7022, the second phase shift Device 7082 and phase property obtain module 703 and are sequentially connected with, and so on, the n-th receiving coil 701n, n-th obtain module 702n, N-th phase shifter 708n obtains module 703 with phase property and is sequentially connected with.
In the present embodiment, the first phase shifter 7081 is used to adjust the phase of 7011 output signal of the first receiving coil, makes gold Belong to calibration object and the phase that detects when the second receiving coil 7012 is passed through by the first receiving coil 7011 and metal calibration object Characteristic value is identical.The size of each phase shift of 708n by controlling phase shifter 7081 respectively ..., while detecting metal calibration object difference Phase property value when by first receiving coil 7011 ... the n-th receiving coil 701n, make its phase property value respectively with this Metal is demarcated identical when phase property value (the phase property value of datum mark calibration object) of the object by the second receiving coil 7012. The control of 708 suspension control signal of phase shifter, which can be issued by host, tester can by adjusting phase shifting parameter on host into One step controls phase shifter 708 and works.In addition, the mode about adjustment 708 phase shift size of phase shifter, can also pass through manual side Formula adjusts the size of the potentiometer of phase shifter 708 to control the phase shift size of phase shifter 708, until metal calibration object passes through Second receiving coil 7012 and metal calibration object are identical by the phase property value detected when the first receiving coil 7011.It is logical Above-mentioned phase shifter correcting mode is crossed, the first receiving coil 7011 can be regarded as has and the identical phase of the second receiving coil 7012 The coil of position feature detection performance, is conducive to the compatibility and uniformity of phase property table data, convenient for detecting in different metal The receiving coil that same metal detector is migrated or solved in device has multiple analog features different causes phase property value not united One the problem of.
It should be understood that the sorting metals detection system provided in above-described embodiment is when carrying out sorting metals detection, Only the example of the division of the above functional modules, it in practical application, can according to need beautiful by above-mentioned function distribution It is completed by different functional modules, i.e., the internal structure as sorting metals detection system is divided into different functional modules, To complete all or part of the functions described above.In addition, sorting metals detection system provided by the above embodiment and metal The scaling method embodiment of classification detection belongs to same design, and specific implementation process is detailed in embodiment of the method, no longer superfluous here It states.
After calibration, in the different receiving coil positions (5th area, 6th area, 9th area, 10th area) of sorting metals detection system, to tested Object red copper carries out sorting metals identification, test result such as table 1:
Table 1
After calibration, in the different receiving coil positions (5th area, 6th area, 9th area, 10th area) of sorting metals detection system, to tested Object can carries out sorting metals identification, test result such as table 2:
Table 2
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..

Claims (25)

1. a kind of scaling method of sorting metals detection characterized by comprising
Metal calibration object does not pass through the induction zone of metal detector receiving coil, and transmitting coil emits pumping signal, receiving coil It generates initial signal induced electromotive force y=A cos (ω t)；
Metal demarcates object by the induction region of the receiving coil of the metal detector, and the receiving coil nearby generates vortex Effect, the induced electromotive force for influencing receiving coil generation make the initial signal y become y '=Aycos(ωt+q)；
Obtain the induced electromotive force variable quantity of the receiving coilExtract phase property value By fixed phase property valueIt is associated with the material composition of metal calibration object；
Wherein, A, Ay、AxRepresentation signal amplitude, ω representation signal frequency, the phase of q representation signal y ',Represent induced electromotive force Variable quantity yxPhase；
By the phase property valueCalibration object phase in the metal calibration object material composition information write-in alarm database Mark sheet.
2. the scaling method of sorting metals detection as described in claim 1, which is characterized in that the phase of the metal calibration object Characteristic valueRepeatedly measurement is averaged to obtain.
3. the scaling method of sorting metals detection according to claim 2, it is characterised in that: further comprising the steps of: will Datum mark demarcates object by the induction region of the receiving coil of the metal detector, phase property value Z is obtained, by phase property Value Z is set as phase property datum mark 0.
4. the scaling method of sorting metals detection according to claim 3, it is characterised in that: further comprising the steps of: meter It calculatesObtain phase property value θ of the metal calibration object based on datum mark calibration object；Phase property value θ, metal are demarcated into object Composition information write-in alarm database in calibration object phase property table.
5. the scaling method of sorting metals detection according to claim 4, it is characterised in that: the metal calibration object is equipped with M, m metal demarcates object and is expressed as θ based on the phase property value of datum mark calibration objectm, wherein M, m are greater than 1 natural number, M≥m。
6. the scaling method of sorting metals detection according to claim 5, it is characterised in that: the metal calibration object belongs to The minimum value of same class, the phase property value by metal calibration object based on datum mark calibration object is set as the metalloid to maximum value Demarcate phase property value range of the object based on datum mark calibration object.
7. the scaling method of sorting metals detection according to claim 4, it is characterised in that: further comprising the steps of: will First datum mark demarcates induction region of the object by the receiving coil of the metal detector, obtains phase property value S, and by its The phase property value and the first datum mark for demarcating object phase property table or/and datum mark is demarcated to object in alarm database is written Demarcate the calibration object phase property table in the difference Z-S write-in alarm database of the phase property value of object.
8. the scaling method of sorting metals detection according to claim 7, it is characterised in that: in calibration object phase property table Middle write-in red copper and the phase property difference of stainless steel are 34 °.
9. the scaling method of sorting metals detection according to claim 7, it is characterised in that: further comprising the steps of: root According in the calibration object phase property table, datum mark demarcates the phase property value of object and the phase property of the first datum mark calibration object The phase property value of difference Z-S, metal calibration object based on datum mark calibration object of value is θ, calculates metal calibration object and is based on first Simultaneously calibration object phase property table is written in the phase property value θ+Z-S of datum mark calibration object.
10. according to the scaling method of the sorting metals detection of any claim in claim 3-9, it is characterised in that: by base Calibration object passes through the induction region of the first receiving coil on schedule, obtains the phase that datum mark calibration object corresponds to the first receiving coil Characteristic value Y calculates the first receiving coil and corresponds to the correction value Y-Z of the receiving coil and calibration object phase property table is written.
11. according to the scaling method of the sorting metals detection of any claim in claim 3-9, it is characterised in that: adjustment The phase shifter connecting with the first receiving coil makes metal calibration object demarcate object by the receiving coil and metal and connects by first The phase property value detected when take-up circle is identical.
12. sorting metals detection system, including metal detector and the transmitting coil and receiving coil that are provided at its inner portion, It is characterized in that: further including
Module is obtained, does not pass through the induction zone of the metal detector receiving coil, transmitting coil transmitting for metal calibration object Pumping signal obtains receiving coil and generates initial signal induced electromotive force y=A cos (ω t)；And metal calibration object passes through The induction region of the receiving coil of the metal detector, the receiving coil nearby generate eddy current effect, influence receiving coil The induced electromotive force of generation makes the initial signal y become y '=AyCos (ω t+q) obtains signal y1 '；
Phase property obtains module, for obtaining the induced electromotive force variable quantity of the receiving coilExtract phase property valueBy fixed phase property valueObject is demarcated with the metal Material composition association；
Alarm database is used for the phase property valueThe metal calibration object material composition information write-in calibration object phase Position mark sheet, and store the calibration object phase property table；
It is described to judge whether the phase property value R of measured object meets for searching the calibration object phase property table for judgment module Demarcate the decision condition in object phase property table；If meeting the decision condition in calibration object phase property table, doubtful letter is issued Number；
Wherein, A, Ay、AxRepresentation signal amplitude, ω representation signal frequency, the phase of q representation signal y ',Represent induced electromotive force Variable quantity yxPhase.
13. sorting metals detection system as claimed in claim 12, it is characterised in that: the phase property of the metal calibration object ValueRepeatedly measurement is averaged to obtain.
14. sorting metals detection system as claimed in claim 13, it is characterised in that: further include datum mark calibration object, be used for The induction region that datum mark calibration object is passed through to the receiving coil, obtains its phase property value Z and is set as phase property benchmark Point 0.
15. sorting metals detection system as claimed in claim 14, it is characterised in that: further include benchmark module, be used for It calculatesObtain phase property value θ of the metal calibration object based on datum mark calibration object；Calibration in the alarm database There are the composition information of phase property value θ, metal calibration object in object phase property table.
16. sorting metals detection system as claimed in claim 15, it is characterised in that: the metal calibration object is a equipped with M, the M metal demarcates object and is expressed as θ based on the phase property value of datum mark calibration objectm, wherein M, m are greater than 1 natural number, M >=m.
17. sorting metals detection system as claimed in claim 16, it is characterised in that: the metal calibration object belongs to same Class demarcates the phase property value range in object phase property table with metalloid calibration object based on datum mark calibration object, such It is the phase that metal demarcates that object demarcates object based on datum mark that metal, which demarcates phase property value range of the object based on datum mark calibration object, The minimum value of characteristic value is to maximum value.
18. sorting metals detection system as claimed in claim 15, it is characterised in that: it further include the first datum mark calibration object, The phase property value S or/and benchmark of the first datum mark calibration object are written in calibration object phase property table in alarm database The difference Z-S of the phase property value of the phase property value and the first datum mark calibration object of point calibration object.
19. sorting metals detection system as claimed in claim 18, it is characterised in that: calibration object phase property table in Red copper and the phase property difference of stainless steel are 34 °.
20. sorting metals detection system as claimed in claim 18, it is characterised in that: further include benchmark module, be used for According in calibration object phase property table, datum mark demarcates the phase property value of object and the phase property value of the first datum mark calibration object Difference Z-S, metal calibration object based on datum mark calibration object phase property value be θ, calculate metal calibration object be based on the first base The phase property value θ+Z-S of object is demarcated on schedule.
21. the sorting metals detection system as described in any claim in claim 15-20, it is characterised in that: further include First receiving coil；The phase property obtains module and is also used to datum mark demarcating the induction zone that object passes through the first receiving coil Domain obtains the phase property value Y that datum mark calibration object corresponds to the first receiving coil；Benchmark module is also used to calculate first Receiving coil corresponds to the correction value Y-Z of receiving coil.
22. the sorting metals detection system as described in any claim in claim 15-20, it is characterised in that: further include The phase shifter is arranged between the first receiving coil and the acquisition module in first receiving coil and phase shifter；The phase shifter For adjusting the phase of the first receiving coil output signal, so that metal calibration object is demarcated object by the receiving coil and metal and lead to The phase property value detected when crossing the first receiving coil is identical.
23. sorting metals detection system as claimed in claim 12, which is characterized in that the decision condition is: measured object Phase property value R and calibration object phase property table acceptance of the bid earnest phase property valueDifference within the scope of preset.
24. sorting metals detection system as claimed in claim 12, which is characterized in that the decision condition is: measured object base Phase property value of the object based on datum mark calibration object is demarcated in measured object metalloid in the phase property value R-Z of datum mark calibration object In range, Z is the phase property value of datum mark calibration object.
25. the sorting metals detection system as described in any claim in claim 12-24, it is characterised in that: described to doubt Likelihood signal includes the composition information of metal calibration object.
CN201811265003.2A 2018-10-26 2018-10-26 A kind of scaling method and system of sorting metals detection Pending CN109557167A (en)

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