CN105842741B - A kind of metal detecting device and method - Google Patents
A kind of metal detecting device and method Download PDFInfo
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- CN105842741B CN105842741B CN201610170096.5A CN201610170096A CN105842741B CN 105842741 B CN105842741 B CN 105842741B CN 201610170096 A CN201610170096 A CN 201610170096A CN 105842741 B CN105842741 B CN 105842741B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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Abstract
Metal detecting device provided in an embodiment of the present invention and method, it is related to metal detection field.The metal detecting device and method of the present invention, the detectable signal for covering multiple Frequency points is sent, metal is detected, the detectable signal for avoiding certain metal to single-frequency is insensitive, cause to detect the problem of success rate reduces, improve the detection success rate to metal.Simultaneously can also be very convenient by adjusting detection of the frequency component realization of detectable signal to special metal.
Description
Technical field
The present invention relates to metal detection field, in particular to a kind of metal detecting device and method.
Background technology
Whether detection related personnel carries metal, is an emphasis of current safety check work.At present, make during safety check
The method for detecting metal is that after fixed detectable signal is sent by transmitting coil, detectable signal is entered by receiving coil
Row receives, and contrasts the difference between the detectable signal sent and the signal received, judges whether metal.But use this
Kind detection mode, the detection accuracy rate to metal is inadequate, while can not meet the needs of being detected to a variety of different metals.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of metal detecting device and method.
A kind of metal detecting device provided in an embodiment of the present invention, applied to computer installation, the computer installation with
One is used to send to connect with the signal transceiver for receiving detectable signal, and the metal detecting device includes：
Transceiver control module, for controlling the signal transceiver to send the detection of multiple frequency components including setting
Signal；
Detectable signal decomposing module, the detectable signal for being received to the signal transceiver are decomposed, connect
Multiple frequency components that the detectable signal received includes；
Frequency component judge module, for respectively detecting obtained multiple frequency components, judge whether to join
Numerical value change exceedes the frequency component of default judgment threshold, is determined whether to detect metal according to judged result.
Preferably, the mode that the frequency component judge module is detected to obtained multiple frequency components respectively is：
The amplitude of each frequency component and the ratio of phase are calculated respectively；
Judge whether the ratio K is located at default metal threshold interval；
Wherein, if the ratio corresponding at least one frequency component is located at default metal threshold interval, judge
Detect metal.
Preferably, the metal threshold interval includes multiple subintervals for corresponding to dissimilar metals respectively, the frequency
Component judge module is additionally operable to the subinterval according to belonging to the ratio, judges the metal species detected.
Preferably, the metal detecting device also includes：
Detectable signal adjusting module, the spy that the species of the metal for detecting as needed is sent to the signal transceiver
The frequency for surveying the frequency component that signal includes is adjusted.
Preferably, the metal detecting device also includes：
Alarm module, for being alarmed when detecting metal.
A kind of metal probing method provided in an embodiment of the present invention, applied to one be used for send and receive detectable signal
The computer installation of signal transceiver connection, methods described include：
The signal transceiver is controlled to send the detectable signal of multiple frequency components including setting；
The detectable signal received to the signal transceiver decomposes, and the detectable signal received includes more
Individual frequency component；
Obtained multiple frequency components are detected respectively, judge whether that parameter value variation exceedes default judgement
The frequency component of threshold value, determined whether to detect metal according to judged result.
Preferably, the mode that is detected respectively to obtained multiple frequency components is：
The amplitude of each frequency component and the ratio of phase are calculated respectively；
Judge whether the ratio K is located at default metal threshold interval；
Wherein, if the ratio corresponding at least one frequency component is located at default metal threshold interval, judge
Detect metal.
Preferably, the metal threshold interval includes multiple subintervals for corresponding to dissimilar metals respectively, methods described
Also include：According to the subinterval belonging to the ratio, the metal species detected are judged.
Preferably, methods described also includes：
The frequency that the detectable signal that the species of the metal detected as needed is sent to the signal transceiver includes point
The frequency of amount is adjusted.
Preferably, methods described also includes：
Alarmed when detecting metal.
Compared with prior art, metal detecting device of the invention and method, the detection letter for covering multiple Frequency points is sent
Number, metal is detected, the detectable signal for avoiding certain metal to single-frequency is insensitive, causes to detect success rate reduction
The problem of, improve the detection success rate to metal.It can also be realized simultaneously by adjusting the frequency component of detectable signal to spy
The detection of deposit category, it is very convenient.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the use state diagram for the computer installation that present pre-ferred embodiments provide.
Fig. 2 is the block diagram for the computer installation that present pre-ferred embodiments provide.
Fig. 3 is the high-level schematic functional block diagram of metal detecting device of the present invention.
Fig. 4 is the flow chart for the metal probing method that present pre-ferred embodiments provide.
Main element symbol description
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be configured to arrange and design with a variety of herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
As shown in figure 1, it is the use state diagram for the computer installation 100 that present pre-ferred embodiments provide.It is described
The signal transceiver 200 that computer installation 100 is used to send and receive detectable signal by network with one is connected, to carry out data
Communication.The signal transceiver 200 includes signal generation apparatus, transmitting coil and receiving coil.Given birth to by signal generation apparatus
Into detectable signal sent by transmitting coil, detectable signal changes after running into detected object, then is carried out by receiving coil
Receive.The metal detecting device 10 for being arranged at computer installation 100 is handled the detectable signal that receiving coil receives, real
Now to the detection of metal.The computer installation 100 can be that single-chip microcomputer, embedded device or PC etc. have data
The device of processing function.
As shown in Fig. 2 it is the block diagram of the computer installation 100 provided for present pre-ferred embodiments.The meter
Calculation machine device 100 includes metal detecting device 10, memory 20 and processor 30.
The memory 20, processor 30 are directly or indirectly electrically connected between each other, with realize the transmission of data or
Interaction.It is electrically connected with for example, these elements can be realized by one or more communication bus or signal wire between each other.The gold
Category detection device 10 include it is at least one can be stored in the form of software or firmware (firmware) in the memory 20 or
The software function module being solidificated in the operating system (operating system, OS) of the computer installation 100.The place
Reason device 30 is used to perform the executable module stored in memory, such as the software function mould that the metal detecting device 10 includes
Block or computer program.
Wherein, memory 20 may be, but not limited to, random access memory (Random Access Memory,
RAM), read-only storage (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only
Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only Memory, EPROM),
Electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only Memory, EEPROM) etc..
Wherein, memory 20 is used for storage program, and the processor 30 is after execute instruction is received, execution described program, foregoing
The method performed by computer installation 100 that the stream process that inventive embodiments any embodiment discloses defines can apply to handle
In device 30, or realized by processor 30.
Processor 30 is probably a kind of IC chip, has the disposal ability of signal.Above-mentioned processor 30 can be with
It is general processor, including central processing unit (Central Processing Unit, abbreviation CPU), network processing unit
(Network Processor, abbreviation NP) etc.；Can also be digital signal processor (DSP), application specific integrated circuit (ASIC),
Ready-made programmable gate array (FPGA) either other PLDs, discrete gate or transistor logic, discrete hard
Part component.It can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor
Can be microprocessor or the processor can also be any conventional processor etc..
Referring to Fig. 3, it is that the functional module of metal detecting device 10 shown in Fig. 2 that present pre-ferred embodiments provide is shown
It is intended to.The metal detecting device 10 includes transceiver control module 101, detectable signal decomposing module 102, frequency component and judged
Module 103, detectable signal adjusting module 104 and alarm module 105.
The transceiver control module 101, for controlling the signal transceiver 200 to send multiple frequencies including setting
The detectable signal of component.
According to eddy current effect, when in magnetic field caused by transmitting coil, when having metal object, what receiving coil induced
Signal will change.The change of the signal induced by detecting receiving coil, you can realize the detection to metal.In reality
In use, other nonmetallic substances, when entering magnetic field caused by transmitting coil, the signal induced to receiving coil can also produce
Raw certain influence.For the signal of different frequency, the change caused by metal is different.At some frequencies, metal with it is non-
Change caused by metal is all very small, can not effectively make a distinction, and easily causes the detection accuracy rate to metal to reduce, or
Erroneous judgement.Therefore, the detectable signal of multiple frequency components is included by sending, the different frequency of more coverings, more preferable to reach as far as possible
Effect on Detecting.
The detectable signal decomposing module 102, the detectable signal for being received to the signal transceiver decompose,
Multiple frequency components that the detectable signal received includes.
When detectable signal is sent by transmit coil, what multiple frequency components were superimposed when in time domain.If detect certain
Whether the signal in individual frequency changes, it is necessary to the detectable signal received to receiving coil makes a distinction on frequency domain, carries
Take out multiple frequency components that detectable signal includes.In the present embodiment, the operation can be realized by wave filter.
The frequency component judge module 103, for being detected respectively to obtained multiple frequency components, judge whether
The frequency component that parameter value variation exceedes default judgment threshold be present, determined whether to detect metal according to judged result.
Because detected metal may be insensitive to the signals of some frequencies, cause caused by detectable signal change it is non-
It is often small, therefore when being detected, checked respectively for all frequency components, when wherein at least one frequency component
Parameter value variation has exceeded default judgment threshold, decides that and detects metal.
Specifically, when metal enters in magnetic field caused by transmitting coil the phase and amplitude of reception signal will be caused to become
Change.When being detected respectively to multiple frequency components, the mode of detection is to calculate the amplitude and phase of multiple frequency components respectively
The ratio of position.When the intensity for the detectable signal that transmitting coil is sent is fixed, on a Frequency point, caused by same metal
Amplitude and phase place change, amplitude and phase Ratio invariableness.The amplitude of each frequency component and the ratio of phase are calculated respectively, are designated as
K, judges whether ratio K belongs to default metal threshold interval when detecting metal, if at least one frequency component is corresponding
The ratio K be located at default metal threshold interval, then judge detect metal.
The specific method of the ratio K of calculating amplitude and phase is：Assuming that the detectable signal that transmitting coil is sent is expressed as：
S0(t)=a0sin(ω0t)+a1sin(ω1t)+…+ansin(ωnt)
The detectable signal that receiving coil receives is expressed as：
S1(t)=b0sin(ω0t+θ0)+b1sin(ω1t+θ1)+…+bnsin(ωnt+θn)
Multiple frequency components of the detectable signal received are expressed as：S10(t)=b0sin(ω0t+θ0)、S11(t)
=b1sin(ω1t+θ1)、…、S1n(t)=bnsin(ωnt+θn)
Each frequency component is orthogonalized, with one of component S10(t)=b0sin(ω0t+θ0) exemplified by.By S10
(t) phase shift pi/2 is changed into S '10(t)=b0cos(ω0t+θ0).Output is S after being orthogonalized10i(t)=b0S10(t)cos(ω0T), S10q(t)=b0S′10sin(ω0t).Orthogonal signalling are subtracted each other into S10i(t)-S10q(t)=sin (θ0).Obtain θ0=arcsin
(S10i(t)-S10q(t)).Amplitude and phase ratio can be calculated, is designated as K0=b0/θ0。
In the present embodiment, because the property of dissimilar metals is different, on a Frequency point, different types of metal
The amplitude that detectable signal caused by material changes is different from phase ratio.Different metal is also different to the susceptibility of signal frequency,
It is caused to change greatly as ferromagnetic metal is higher to low frequency signal susceptibility, and in high-frequency signal environment, to signal almost
Do not influence.When judging whether to detect metal, determined whether by judging whether ratio K enters the section of metal threshold value
Metal is detected, for each frequency, is respectively arranged with corresponding metal threshold interval.Wherein, different frequency, what it was set
Metal threshold interval may be identical, it is also possible to different.
Further, metal threshold interval includes multiple subintervals for corresponding to dissimilar metals respectively, and for difference
Frequency, the dividing mode in subinterval is also incomplete same.By the ratio K being calculated, can not only judge whether to visit
Measure metal, moreover it is possible on the basis of metal is detected, the species of metal is determined by ratio K and frequency.
The detectable signal adjusting module 104, for the species of metal that detects as needed to the signal transceiver
The frequency for the frequency component that 200 detectable signals sent include is adjusted.
Based on above-mentioned characteristic, relation between the corresponding ratio K of dissimilar metals can be directed to, composition is detected
The frequency of multiple frequency components of signal is adjusted, to realize the detection to special metal.Selection needs the metal ratio detected
The signal of more sensitive multiple frequencies is as component combination into detectable signal.When the ratio calculated according to detectable signal is detected
K enters the section of metal threshold value, then explanation detects the metal.
The alarm module 105, for being alarmed when detecting metal.
When detecting metal, reminded in a manner of sound and light alarm, in security protection work, can play and carry well
Awake effect.
For example, in some mine, in order to prevent that carrying noble metal leaves, it is necessary to each disengaging personnel worker privately
It is scanned, detects whether to carry precious metal, but the worker under ore deposit, which can generally also carry some, includes common metal
Instrument, now just need to detect precious metal.The computer with metal detecting device 10 that the present embodiment is provided
Device 100 and signal transceiver 200 are arranged at import and export, and metal detecting device 10 is connected with alarm.Adjustment detection letter
Number frequency component, selection common metal is insensitive, precious metal is sensitive frequency component composition detectable signal.It is expensive when carrying
When the worker of heavy metal is by the inlet and outlet, just accurately it can be identified and be alarmed, and only be carried comprising common
When the tool maker of metal is by the inlet and outlet, then it will not alarm.Scene for needing to detect all metals, by detectable signal
It is arranged to be made up of the multiple frequency components for covering as far as possible wide frequency.
Referring to Fig. 4, it is the metal for being applied to the metal detecting device 10 shown in Fig. 3 that present pre-ferred embodiments provide
The flow chart of detection method.The idiographic flow shown in Fig. 4 will be described in detail below.
Step S101, in the detectable signal that the species of the metal detected as needed is sent to the signal transceiver 200
Including the frequency of frequency component be adjusted.According to used scene, suitable detectable signal is selected, to reach more preferable spy
Survey effect.
Specifically, step S101 can be performed by the detectable signal adjusting module 104, the adjustment side of specific frequency component
Method can join the above-mentioned detailed description to detectable signal adjusting module 104.
Step S102, the signal transceiver 200 is controlled to send the detectable signal of multiple frequency components including setting.
Specifically, step S102 can be performed by the transceiver control module 101, and the particular content on step S102 can
Join the above-mentioned detailed description to transceiver control module 101.
Step S103, the detectable signal received to the signal transceiver decompose, the detection letter received
Number multiple frequency components included.
Specifically, step S103 can be performed by the detectable signal decomposing module 102, the particular content on step S103
The above-mentioned detailed description to detectable signal decomposing module 102 can be joined.
Step S104, the amplitude of multiple frequency components and the ratio of phase are calculated respectively.
Step S105, judge whether that the ratio corresponding at least one frequency component is located at default metal threshold value
Section, if it is, performing step S106 and step S107.
Step S106, according to the subinterval belonging to the ratio, judge the metal species detected.
Specifically, step S104- steps S106 is performed by the frequency component judge module 103.Wherein to frequency component
Computational methods and judge whether that the method for detecting metal can join the above-mentioned detailed description for judging frequency component mould.
Step S107, is alarmed.
Specifically, step S107 can be performed by the alarm module 105, and the particular content on step S107 can join above-mentioned
To the detailed description of alarm module 105.
The metal detecting device and method of the present invention, sends the detectable signal for covering multiple Frequency points, metal is visited
Survey, the detectable signal for avoiding certain metal to single-frequency is insensitive, causes to detect the problem of success rate reduces, improves pair
The detection success rate of metal.Simultaneously can also be non-by adjusting detection of the frequency component realization of detectable signal to special metal
It is often convenient.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, can also pass through
Other modes are realized.Device embodiment described above is only schematical, for example, flow chart and block diagram in accompanying drawing
Show the device of multiple embodiments according to the present invention, method and computer program product architectural framework in the cards,
Function and operation.At this point, each square frame in flow chart or block diagram can represent the one of a module, program segment or code
Part, a part for the module, program segment or code include one or more and are used to realize holding for defined logic function
Row instruction.It should also be noted that at some as in the implementation replaced, the function that is marked in square frame can also with different from
The order marked in accompanying drawing occurs.For example, two continuous square frames can essentially perform substantially in parallel, they are sometimes
It can perform in the opposite order, this is depending on involved function.It is it is also noted that every in block diagram and/or flow chart
The combination of individual square frame and block diagram and/or the square frame in flow chart, function or the special base of action as defined in performing can be used
Realize, or can be realized with the combination of specialized hardware and computer instruction in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate to form an independent portion
Point or modules individualism, can also two or more modules be integrated to form an independent part.
If the function is realized in the form of software function module and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are causing a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.Need
Illustrate, herein, such as first and second or the like relational terms be used merely to by an entity or operation with
Another entity or operation make a distinction, and not necessarily require or imply between these entities or operation any this reality be present
The relation or order on border.Moreover, term " comprising ", "comprising" or its any other variant are intended to the bag of nonexcludability
Contain, so that process, method, article or equipment including a series of elements not only include those key elements, but also including
The other element being not expressly set out, or also include for this process, method, article or the intrinsic key element of equipment.
In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including the key element
Process, method, other identical element also be present in article or equipment.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.It should be noted that：Similar label and letter exists
Similar terms is represented in following accompanying drawing, therefore, once being defined in a certain Xiang Yi accompanying drawing, is then not required in subsequent accompanying drawing
It is further defined and explained.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (6)
1. a kind of metal detecting device, applied to computer installation, the computer installation and one is used to sending and receiving detection
The signal transceiver connection of signal, it is characterised in that the metal detecting device includes：
Transceiver control module, for controlling the signal transceiver to send the detection letter of multiple frequency components including setting
Number；
Detectable signal decomposing module, the detectable signal for being received to the signal transceiver are decomposed, received
Multiple frequency components for including of detectable signal；
Frequency component judge module, for calculating respectively obtained multiple frequency components, obtain each frequency component
The ratio of amplitude and phase, judges whether the ratio is located at default metal threshold interval, is determined whether according to judged result
Metal is detected, wherein, if the ratio corresponding at least one frequency component is located at default metal threshold interval, sentence
Surely metal is detected；
The metal threshold interval includes multiple subintervals for corresponding to dissimilar metals respectively, the frequency component judge module
The subinterval according to belonging to the ratio is additionally operable to, judges the metal species detected.
2. metal detecting device according to claim 1, it is characterised in that the metal detecting device also includes：
Detectable signal adjusting module, the detection that the species of the metal for detecting as needed is sent to the signal transceiver are believed
The frequency of number frequency component included is adjusted.
3. according to the metal detecting device described in claim 1-2 any one, it is characterised in that the metal detecting device is also
Including：
Alarm module, for being alarmed when detecting metal.
A kind of 4. metal probing method, applied to the calculating being connected with one for sending and receiving the signal transceiver of detectable signal
Machine device, it is characterised in that methods described includes：
The signal transceiver is controlled to send the detectable signal of multiple frequency components including setting；
The detectable signal received to the signal transceiver decomposes, multiple frequencies that the detectable signal received includes
Rate component；
Obtained multiple frequency components are calculated respectively, obtain the amplitude of each frequency component and the ratio of phase, are judged
Whether the ratio is located at default metal threshold interval, is determined whether to detect metal according to judged result, wherein, if extremely
The ratio corresponding to a few frequency component is located at default metal threshold interval, then judges to detect metal；
The metal threshold interval includes multiple subintervals for corresponding to dissimilar metals respectively, according to the son belonging to the ratio
Section, judge the metal species detected.
5. metal probing method according to claim 4, it is characterised in that methods described also includes：
The frequency component that the detectable signal that the species of the metal detected as needed is sent to the signal transceiver includes
Frequency is adjusted.
6. according to the metal probing method described in claim 4-5 any one, it is characterised in that methods described also includes：
Alarmed when detecting metal.
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| CN109610135A (en) * | 2019-01-14 | 2019-04-12 | 珠海格力电器股份有限公司 | Processing method and device for washing machine, storage medium and processor |
| CN111751890A (en) * | 2020-06-11 | 2020-10-09 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Land mine detection system and method capable of inhibiting background |
| CN111812733B (en) * | 2020-07-21 | 2023-05-12 | 上海太易检测技术有限公司 | Information processing method and device for multi-frequency gold inspection machine |
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