CN105425303B - Mobile magnetic target detection system based on passive magnetic flux - Google Patents
Mobile magnetic target detection system based on passive magnetic flux Download PDFInfo
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- CN105425303B CN105425303B CN201510922515.1A CN201510922515A CN105425303B CN 105425303 B CN105425303 B CN 105425303B CN 201510922515 A CN201510922515 A CN 201510922515A CN 105425303 B CN105425303 B CN 105425303B
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Abstract
The mobile magnetic target detection system based on passive magnetic flux that the invention discloses a kind of, including three height probe portion successively increased, the voltage data actuation that is electrically connected with each magnetic core induction coils of three probe portions and control system；First part's height corresponds to the heel of human body to knee, second part height corresponds to the knee of human body to navel, Part III height corresponds to the navel of human body to the crown, wherein, first part and Part III respectively arrange magnetic core induction coil A and magnetic core induction coil B in a short transverse, second part is made of 2~16 groups of magnetic core induction coil groups arranged in parallel from below to up, every group comprising 1~3 magnetic core induction coil C, wherein four in short transverse magnetic core induction coil C and magnetic core induction coil A and magnetic core induction coil B on the same line.The system of the present invention can realize that full passive detection radiationlessly, high sensitivity can monitor the carrying magnetic electronic equipment under any state, and at low cost, and reliability is high.
Description
Technical field
The invention belongs to Electromagnetic measurements technical fields, and in particular to a kind of to utilize magnetic core coil Electromagnetic measurements skill
Art realizes the monitoring to mobile magnetic target such as mobile phone.
Background technology
In recent years, the considerations of defence and military and each new high-tech enterprise are for secrecy and technical barrier setting etc. is right
The management and control of electronic equipment requires constantly to reinforce.
For smart mobile phone as a kind of electronic equipment with fastest developing speed, its own function is also stronger and stronger.For enhancing
Secrecy and tightness, in unit management and control region, and in occasions such as unit recruitment, school examination, project appraisal, momentous conferences,
Carrying mobile phone admission is not allowed.Above-mentioned zone or occasion are brought into order to limit mobile phone, are generally monitored in entrance setting mobile phone
Warning device, or open cellular phone signal shielding device in important events.
Currently, the mode of detection magnetic target is mainly by two kinds：Metal detector and detection system based on magnetometer.
Metal detector includes at least two parts, and a part is to emit the excitation coil of variation magnetic field, and another part is to connect
Take-up circle can form vortex when metal target is by excitation coil magnetic generating field domain in metal, vortex generates magnetic field, leads to
It crosses receiving coil and can detect that the magnetic field, to achieve the purpose that detect metal target.This method will produce electromagnetic radiation, for a long time
Using harmful to body；Whether cannot be distinguished is the magnetic electronic equipment such as mobile phone.
Magnetic target detection system based on magnetometer, the main magnetic strength comprising for measuring space point magnetic induction
Meter, the system is directly by the variation of measurement space magnetic induction to determine whether there is moving magnetic target, and the system is to detection
Distance is very sensitive, and anti-electromagnetic interference capability is poor, higher for the cost of the weak magnetic targets such as detection mobile phone.
In the implementation of the present invention, radiation, rate of false alarm height, reliability has existed in the prior art in inventor
The defects of low, of high cost.
Invention content
In consideration of it, the purpose of the present invention is to provide a kind of mobile magnetic target detection system based on passive magnetic flux,
The system is used as magnetic flux detection sensor using the spiral shell coiling (magnetic core coil) with magnetic core (permalloy).Have when pedestrian carries
Meeting disturbed magnetic field distribution when magnetic mobile phone passes through sensor proximity so that the magnetic flux of magnetic core coil is abnormal variation,
To generate induced voltage signal on magnetic core coil, which is gone out, and utilizes the signal processing means such as wavelet analysis
The background interference in signal will be detected to exclude, to reach uninterrupted detecting, identify mobile magnetic target such as mobile phone, positioning movement
The position of magnetic target, and send out corresponding prompt.
Present invention employs the following technical solutions to realize：
A kind of mobile magnetic target detection system based on passive magnetic flux, including three height successively increase probe portion
The voltage data actuation and control system divide, being electrically connected with three probe portions；First part's height corresponds to the foot of human body
With to knee, second part height corresponds to the knee of human body to navel, and Part III height corresponds to the navel of human body to the crown,
In, first part and Part III respectively arrange magnetic core induction coil A and magnetic core induction coil B in a short transverse, magnetic core sense
It is respectively 0.15m-0.6m to answer loop A and the length of magnetic core induction coil B；Second part is by 2-16 arranged in parallel from below to up
A magnetic core induction coil group is constituted, and every group includes 1-3 magnetic core induction coil C, the magnetic core induction coil C wherein in short transverse
On the same line with magnetic core induction coil A and magnetic core induction coil B, the length of magnetic core induction coil C 0.08m-0.5m it
Between, each magnetic core induction coil distinguishes lead to voltage data actuation, and voltage data actuation time-sharing multiplex acquires each magnetic core sense
The time domain waveform of the induced voltage signal of coil is answered, then control system is according to signal waveform amplitude, periodic characteristic, frequency domain character
Target magnetic characteristic is extracted, target type is judged and calculates the height of magnetic target, proposes corresponding warning.
Further, magnetic core induction coil is the spiral winding with permalloy magnetic core.
Further, the permalloy iron core radius of magnetic core induction coil A and magnetic core induction coil B 3mm~25mm it
Between；The permalloy iron core radius of magnetic core induction coil C is between 2mm~22mm.
Wherein, mobile magnetic target is that the electronic equipment and pedestrian with communication function such as mobile phone, tablet computer are carry-on
The magnetic bodies (such as irony belt fastener) of carrying.
Wherein, magnetic core induction coil A is arranged in the bottom of first part, and magnetic core induction coil A is arranged in Part III
Centre position, all magnetic core induction coil groups in addition to loop A, B are evenly distributed on second part.
Wherein, between 200~5000, other all coils the number of turns exist spiral coil the number of turns of magnetic core induction coil A, B
Between 100~3000.
The mobile magnetic target detection system based on passive magnetic flux of the present invention, does not emit excitation radiofrequency signal, only logical
The mode for crossing passive electromagnetic induction monitors magnetic target.The system has the characteristics that：1) full passive detection, it is radiationless；2)
High sensitivity；3) any state (booting, shutdown) lower band magnetic electron equipment can be monitored；4) inexpensive, it is highly reliable.
Description of the drawings
Fig. 1 is the mobile magnetic target detection system schematic diagram based on passive magnetic flux of the present invention；
Wherein, 1- magnetic cores induction coil A；2- magnetic core induction coils B；3-14 is magnetic core induction coil C.
Specific implementation mode
Below in conjunction with the accompanying drawings to the present invention the present invention the mobile magnetic target detection system based on passive magnetic flux into
Row further illustrates that the explanation is only exemplary, it is no intended to be limited the scope of the invention.
Referring to Fig. 1, Fig. 1 is the mobile magnetic target detection system schematic diagram based on passive magnetic flux of the present invention.In order to
The case where detecting human body carrying mobile phone, first, in accordance with Human Height model, is divided into three sections, first segment is below knee region by height
(0.267 times of height), range from heel to knee, second segment be navel knee (0.333 times of height), range from knee to navel,
The areas third Duan Qiding (0.4 times of height), range is from navel to the crown.According to the general custom of people, mobile phone can it is hand held in, be placed on
Trouser pocket or upper pocket.In these three situations, mobile phone is in knee to navel region, i.e. navel knee.And mobile phone appears in knee
The possibility very little in lower area and the areas Qi Ding.Therefore, the mobile magnetic target detection system of the invention based on passive magnetic flux, altogether
14 magnetic core coils (band) are used, are designed to detection system shown in FIG. 1.The detection system is successively increased including three height
Probe portion, the voltage data actuation being electrically connected with three probe portions and control system；First part's (i.e. below knee region)
The heel of the corresponding human body of height is to knee, the knee of the corresponding human body of second part (navel knee) height to navel, Part III (navel
Pushing up area) navel of the corresponding human body of height is to the crown, according to the XYZ coordinate system of diagram, in each arrangement one in below knee region and the areas Qi Ding
The more relatively large Z-direction of size (short transverse) magnetic core induction coil A (being denoted as 1 in Fig. 1) and magnetic core induction coil B (
It is denoted as 2) in Fig. 1, and increases detection resolution in navel knee, arrange 4 groups of magnetic core induction coils, every group of magnetic core line of induction altogether
Circle includes 3 magnetic core induction coil C, totally 12, i.e. magnetic core induction coil 3-14.4 groups of magnetic core induction coils are uniformly arranged in Z-direction
Row, every group of 3 probes are vertically arranged (are not attached to) two-by-two, are respectively used to detection X, Y (people passes through detection door direction), Z coordinate
The magnetic flux of axis direction.Wherein, the magnetic core induction coil C in 4 groups of magnetic core induction coil Z-directions and magnetic core induction coil A, magnetic core sense
Answer coil B on the same line.Each magnetic core induction coil distinguishes lead to voltage data actuation, and voltage data actuation timesharing is multiple
With the time domain waveform for the induced voltage signal for acquiring each magnetic core induction coil, then control system according to signal waveform amplitude,
Periodic characteristic, frequency domain character extract target magnetic characteristic, judge target type and calculate the height of magnetic target, propose phase
The warning answered.
In a specific embodiment, the height ranges of people are set as 1.5m~2m, pay the utmost attention to the detection in navel knee
Covering, then below knee region altitude range is 0~0.4m, and navel knee 0.4m~1.2m, Qi Ding area 1.2m~2m, then detection system is total
Height 2m, magnetic core induction coil A are arranged in below knee region bottom, and magnetic core induction coil B is arranged in the areas Qi Ding centre position, navel knee
4 groups of probes in area are evenly distributed between 0.4m~1.2m.
Wherein, magnetic core induction coil A is consistent with magnetic core induction coil B sizes, length value between 0.3m~0.4m,
The permalloy iron core radius value between 5mm~10mm carried；The size of each magnetic core induction coil C is consistent, and length exists
Value between 0.1m~0.2m, the permalloy iron core radius value between 3mm~8mm carried.
The present invention control system effect be collected voltage signal is filtered, time-frequency conversion, wavelet analysis
Deng processing, and time domain voltage signal waveform feature (pulsewidth, amplitude etc.) is combined, to identify target, whether is emphasis resolution target
It is the communication equipment of mobile phone etc.
The present invention for the electronic communication equipments such as mobile phone have the characteristics that the magnetism that can not be eliminated this, using based on passive magnetic
Logical passive detection mode monitors mobile phone.When being monitored using the detection system, only the detection system need to be positioned over pipe
Control the admission mouth edge of the special occasions such as region.Each magnetic core coil induced voltage that control system can be acquired according to data actuation
Signal waveform amplitude, periodic characteristic, frequency domain character extract target magnetic characteristic, and the position of coupling coil, judge target class
Type and the height for calculating magnetic target propose corresponding warning.
Although the detailed description and description of the specific embodiments of the present invention are given above, it should be noted that
We can carry out various equivalent changes and modification to the above embodiment according to the concept of the present invention, and generated function is made
It, should all be within protection scope of the present invention when with the spirit still covered without departing from specification and attached drawing.
Claims (5)
1. a kind of mobile magnetic target detection system based on passive magnetic flux, including probe portion that three height successively increase
The voltage data actuation and control system divide, being electrically connected with three probe portions；First part's height corresponds to the foot of human body
With to knee, second part height corresponds to the knee of human body to navel, and Part III height corresponds to the navel of human body to the crown,
In, first part and Part III respectively arrange magnetic core induction coil A and magnetic core induction coil B in a short transverse, magnetic core sense
It is respectively 0.15m-0.6m to answer loop A and the length of magnetic core induction coil B；Second part by from below to up arranged in parallel 2~
16 magnetic core induction coil groups are constituted, every group by 1~3 magnetic core induction coil C, the magnetic core induction coil wherein in short transverse
C and magnetic core induction coil A and magnetic core induction coil B on the same line, the length of magnetic core induction coil C 0.08m-0.5m it
Between, each magnetic core induction coil distinguishes lead to voltage data actuation, and voltage data actuation time-sharing multiplex acquires each magnetic core sense
The time domain waveform of the induced voltage signal of coil is answered, then control system is according to signal waveform amplitude, periodic characteristic, frequency domain character
Target magnetic characteristic is extracted, target type is judged and calculates the height of magnetic target, proposes corresponding warning, wherein magnetic
Core induction coil is the spiral winding with permalloy magnetic core.
2. mobile magnetic target detection system as described in claim 1, wherein magnetic core induction coil A and the magnetic core line of induction
The permalloy iron core radius of B is enclosed between 3mm~25mm；The permalloy iron core radius of magnetic core induction coil C 2mm~
Between 22mm.
3. mobile magnetic target detection system as claimed in claim 1 or 2, wherein mobile magnetic target is mobile phone, tablet
Computer or the portable magnetic bodies of pedestrian.
4. mobile magnetic target detection system as claimed in claim 3, wherein magnetic core induction coil A is arranged in first
The bottom divided, magnetic core induction coil B are arranged in the centre position of Part III, all magnetic cores induction in addition to loop A, B
Coil group is evenly distributed on second part.
5. mobile magnetic target detection system as claimed in claim 1 or 2, wherein the spiral winding of magnetic core induction coil A, B
Number of wire turns is between 200~5000, other all coils the number of turns are between 100~3000.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510922515.1A CN105425303B (en) | 2015-12-14 | 2015-12-14 | Mobile magnetic target detection system based on passive magnetic flux |
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| CN201510922515.1A CN105425303B (en) | 2015-12-14 | 2015-12-14 | Mobile magnetic target detection system based on passive magnetic flux |
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| CN105425303A CN105425303A (en) | 2016-03-23 |
| CN105425303B true CN105425303B (en) | 2018-07-20 |
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| CN106094047B (en) * | 2016-08-17 | 2018-10-26 | 中国电子科技集团公司第二十九研究所 | A kind of array safety inspection method and device based on magnetic abnormal detection |
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| JP3873713B2 (en) * | 2001-11-02 | 2007-01-24 | 松下電器産業株式会社 | Metal detection method and apparatus |
| FR2901888B1 (en) * | 2006-05-30 | 2008-08-22 | Alessandro Manneschi | PORTE DETECTOR OF METALS HAVING PERFECTED INDICATOR MEANS |
| CN201555956U (en) * | 2009-10-09 | 2010-08-18 | 华瑞科力恒（北京）科技有限公司 | Radioactivity safety inspection door |
| CN201859224U (en) * | 2010-07-30 | 2011-06-08 | 东莞市骏宏电子科技有限公司 | Novel digital metal detection door |
| CN202230213U (en) * | 2011-09-19 | 2012-05-23 | 广东守门神电子科技有限公司 | Detecting door passing system |
| CN204287513U (en) * | 2014-11-12 | 2015-04-22 | 东莞市骏宏电子科技有限公司 | A kind of Novel multi metal detection door |
| CN204287511U (en) * | 2014-12-29 | 2015-04-22 | 清华大学 | The quick check system of vehicular and checking vehicles |
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|---|---|---|---|---|
| US4074249A (en) * | 1977-02-04 | 1978-02-14 | Knogo Corporation | Magnetic detection means |
| CN101526627A (en) * | 2009-04-07 | 2009-09-09 | 常晓明 | Differential magnetic detector for monitoring cheating in examination room |
| CN103955001A (en) * | 2014-05-14 | 2014-07-30 | 三峡大学 | Invisible earphone detection device and method |
| CN203811817U (en) * | 2014-05-14 | 2014-09-03 | 三峡大学 | Concealed earphone detection apparatus |
| CN204116622U (en) * | 2014-09-22 | 2015-01-21 | 石家庄于栋电子科技有限公司 | Novel security inspection door |
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