CN201110898Y - Duct type synthetic safety detecting door - Google Patents
Duct type synthetic safety detecting door Download PDFInfo
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- CN201110898Y CN201110898Y CNU200720172509XU CN200720172509U CN201110898Y CN 201110898 Y CN201110898 Y CN 201110898Y CN U200720172509X U CNU200720172509X U CN U200720172509XU CN 200720172509 U CN200720172509 U CN 200720172509U CN 201110898 Y CN201110898 Y CN 201110898Y
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Abstract
The utility model is an improved channel-type comprehensive security gate structure, which comprises a central processing unit, an alarm device, a host computer communication circuit, a parameter adjustment keyboard, a liquid crystal monitoring screen and the related drive circuit, a remote control receiving circuit, an emitting and receiving coil assembly of a high-frequency electromagnetic field and the related drive circuit. The alarm device, the host computer communication circuit, the parameter adjustment keyboard, the liquid crystal monitoring screen and the related drive circuit, the remote control receiving circuit, the emitting and receiving coil assembly of a high-frequency electromagnetic field and the related drive circuit are all controlled by the central processing unit. The key improvement lies in that the emitting and receiving coil assembly of the high-frequency electromagnetic field and the related drive circuit have same structures and are symmetrically leftward and rightward and vertically arranged on both sides of the channel to form two parts of metal detection devices which are respectively matched with independent single chip management systems; the post-processing detected signals are directly sent to the central processing unit for analysis and processing; the two independent single chip management systems are provided with two radioactive detection components respectively arranged on both sides of the channel; the single chip management systems directly establish data exchange agreement with the central processing unit and can transfer request or accept the management of the central processing unit through serial interface.
Description
Technical field
The utility model is the improvement to the channel-type safe examination system.
Background technology
The major function of channel type integrated detector gate is the violated metal object (firearms that for example illegally carry and or controlled knife) of accurately detection of concealed.In recent years, channel-type metal detection door has been widely used in public places such as airport, school, law court, gymnasium, railway station, passenger station, and in the safety inspection process, channel-type metal detection door has become the essential equipment that uses.The structural design that present equipment utilization metal carries out for the principle that the reflected signal of frequency electromagnetic waves is obviously strengthened.Adopt the generator and the Acquisition Circuit of the high-frequency signal on the support that is arranged on door case type in the channel-type metal detection door, formed surveyed area in the passage between doorframe.To the people that passed through carry out omnibearing detection, when the signal of being gathered is handled, then can demonstrate tangible specific variations for the metal target that scans.The circuit that compares to determine in the circuit structure can be analyzed the signal that collects, and can send instruction to the warning executive circuit when specificity occurring, sends sound, light prompting to case inspection personnel.Circuit of the prior art adopts mimic channel to constitute usually, and the huge power consumption of circuit is higher.For the effect that detects the metal object of violating a ban, the running of existing channel-type detection system has three defectives at least: first, the field structure of existing system can not be distinguished tiny non-ferromagnetic metal material, so that explosive or more concealed weapon that some main bodys are made with the non-ferromagnetic metal material then are difficult for being found; The second, former metal detector antijamming capability is very poor, is subject to the interference of environment, phase mutual interference between two or the multiple devices, and the equipment that makes can't operate as normal.The 3rd existing metal detector adopts mimic channel and part digital circuit, make circuit structure huge, thereby reliability is relatively poor.And, also there is the offender that radioactive substance and chemical and biological weapons are taken to public situation in recent years, radioactivity is very serious to the injury of human body, therefore real to the detection of radioactive substance is necessary.
Summary of the invention
The purpose of this utility model is the architecture advances to existing channel type integrated detector gate, to overcome the defective of prior art, improves the analysis level and the danger prohibited cargo product recall rate of detector gate.
The utility model is in order to realize the detecting function to radioactive substance, adopted being used for the radioactivity prospecting assembly.In order further to improve resolution characteristic,, can obtain different resistance values if adopt the variable-frequency scanning technology under different frequency conditions, to measure impedance to metal.By measuring the impedance under a plurality of frequencies, just can obtain valuable component data.The basis of impedance spectrum method that Here it is (IS).Here receiving coil and an electric capacity parallel connection as test model, the impedance that inductor has is j ω L, the impedance that capacitor has is 1/j ω C, wherein j is an imaginary unit, ω is the angular frequency of signal.Adopt complex operation that these impedance components are combined.The imaginary part of impedance is called reactance, and total expression formula is Z=R+jX, and wherein X is reactance, and Z represents impedance.When the frequency of signal rose, capacitive reactance Xc reduced, and inductive reactance xl raises, thereby caused the variation of resulting impedance, and impedance and sweep frequency are the important evidence that funtcional relationship is improvement design of the present invention.
If the target that is detected is linear, the ratio of the Fourier transform separately of the time domain voltage and current that records just equals its impedance, and it can be expressed as a plural number:
E=system voltage wherein, I=system power, t=time domain parameter, F=Fourier transform.
Convert plural form to polar form and just can obtain the amplitude of response signal under characteristic frequency and the relation of phase place and pumping signal:
Phase place=arctan (X/R)
Wherein R and X represent real and imaginary part respectively.The amplitude that calculates is above represented the complex impedance of this element under the characteristic frequency condition.Under the sweep frequency in the regulation variation range, can calculate the complex impedance value of each Frequency point correspondence.
The variation of surrounding environment causes any variation of above-mentioned characteristic when surveying metal, all can cause the change of impedance.By measuring the characteristic of this impedance, will obtain a series of new impedance operators with frequency change.The measured value and the prediction standard value of impedance relatively are easy to draw the detection conclusion.Use this method and can measure tiny metal object accurately, and can be according to the data variation amplitude of amplitude and phase place, the kind that rule is judged metal, thereby the problem of distinguishing tiny non-ferromagnetic metal material solved.Adopt the DSP treatment technology can realize above treatment effect, also solved the problem of anti-electromagnetic interference (EMI) simultaneously.Adopt the highly integrated digital processing chip of AD5933 can finish above technical finesse.Improve the analysis and the resolving ability of this comprehensive detector gate.
Comprise central processing unit in the comprehensive detector gate structure after the improvement, the metal detection circuit that the emission of warning device, upper machine communication circuit, parameter adjustment keyboard, monitor lcd screen and driving circuit thereof, telecommand receiving circuit and electromagnetic field of high frequency under being controlled by central processing unit and receiving coil group and supporting driving circuit thereof and signal processing circuit are formed.Key is that the emission of electromagnetic field of high frequency is that structure is identical with receiving coil group and supporting driving circuit thereof, a left side, right symmetry, be vertically set on the formed two parts metal detecting device in passage both sides, two parts metal detecting device is supporting independently single-chip microcomputer management system respectively, the signal that is detected is directly sent into central processing unit after treatment and is carried out analyzing and processing, two independently the single-chip microcomputer management system divide into two radioactivity prospecting assemblies being managed, also be separately positioned on the passage both sides, single-chip microcomputer management system and central processing unit are directly set up data exchange agreement, and transmit the management of asking or accepting central processing unit by serial line interface.
Good effect of the present utility model is: be provided with the TR that distributes about passage and the mutual coupling effect between the TL transmitting coil by comprehensive detector gate, produced uniform variable-frequency scanning magnetic field.The coil that receiving coil is divided into passage both sides mirror image symmetry is evenly distributed on the vertical plane of passage.Spatially be divided into the refinement position.Such multi-region position more can detect tiny metal.The utility model also is the detection of radioactive substance, and the concrete Miller-Geiger tube assembly that adopts the band compensation is used to survey radioactive article.Thereby overcome the defective of prior art, obtained significant technical progress.
Description of drawings
Accompanying drawing 1 is the structured flowchart of the channel type integrated detector gate of the utility model.
The structured flowchart of accompanying drawing 2 metal detecting devices.
Accompanying drawing 3 is structural representations of coil groups.
In the accompanying drawing, 1 central processing unit, 2 warning devices, 3 upper machine communication circuit, 4 parameter adjustment keyboards, 5 monitor lcds screen and driving circuit thereof, 6 remote-control receiving circuits, 7 metal detection circuit, 7R, the 7L metal detecting device, two parts metal detecting device, 8,9 single-chip microcomputer management systems, 10,11 sensors and treatment circuit, 12 warning indicating devices, 13 photo-electric signal receiving circuits, 14 photosignal radiating circuits, 15 warning indicating devices, 71 frequency conversion type high frequency signal generator circuit, 72 driving circuits, 73 transmit and receive coil groups, 74 multi-channel switch, 75 acquired signal amplifying circuits, 76 calibration circuits, 77 digitized processing circuit, TTL left side transmitting coil, the right transmitting coil of TTR, D adjustment loop.
Embodiment
A kind of channel type integrated detector gate, comprise central processing unit 1 in the detector gate structure, by the warning device 2 under central processing unit 1 control, upper machine communication circuit 3, parameter adjustment keyboard 4, monitor lcd screen and driving circuit 5 thereof, remote-control receiving circuit 6, and the metal detection circuit 7 of the emission of electromagnetic field of high frequency and receiving coil group and supporting driving circuit and signal processing circuit composition, the emission of electromagnetic field of high frequency is that structure is identical with receiving coil group and supporting driving circuit 7 thereof, a left side, right symmetry, be vertically set on the passage both sides and form two parts metal detecting device 7R, 7L, two parts metal detecting device 7R, the supporting setting of 7L difference is single-chip microcomputer management system 8 independently, 9, two independently single-chip microcomputer management system 8 and 9 divide into two radioactivity prospecting assemblies 10 being managed, 11 also are separately positioned on the passage both sides, single-chip microcomputer management system 8,9 are connected with central processing unit 1 through serial line interface.
Can be clearly seen that in conjunction with the accompanying drawings: comprise central processing unit 1 in the structure of the channel type integrated detector gate after the utility model improves, the metal detection circuit 7 that the emission of keyboard 4, monitor lcd screen and driving circuit 5, telecommand receiving circuit 6 and electromagnetic field of high frequency that warning device 2, upper machine communication circuit 3, the parameter adjustment under being controlled by central processing unit 1 used and receiving coil group and supporting driving circuit thereof and signal processing circuit are formed.Crucial its improvement is that the emission of electromagnetic field of high frequency is that structure is identical with receiving coil group and supporting driving circuit 7 thereof, a left side, right symmetry, be vertically set on the passage both sides and form two parts metal detecting device 7R, 7L, two parts metal detecting device 7R, 7L is supporting single-chip microcomputer management system 8 respectively, 9, the signal that is detected is directly sent into central processing unit 1 after treatment and is carried out analyzing and processing, two single-chip microcomputer management systems 8 independently, 9 divide into two radioactivity prospecting assemblies 10 being managed, 11 also are separately positioned on the passage both sides, single-chip microcomputer management system 8,9 directly set up data exchange agreement with central processing unit 1, and by the serial line interface request of transmitting or accept the management of central processing unit 1.
Two parts metal detecting device 7R that structure is identical, 7L all is by frequency conversion type high frequency signal generator circuit 71, driving circuit 72, transmit and receive coil groups 73, multi-channel switch 74, acquired signal amplifying circuit 75, calibration circuit 76, digitized processing circuit 77 is formed, the high-frequency signal output terminal of frequency conversion type high frequency signal generator circuit 71 is through driving circuit 72, multi-channel switch 74 is connected with the transmitting winding group that transmits and receives coil groups 73, the receiving coil group that transmits and receives coil groups 73 is through multi-channel switch 74, acquired signal amplifying circuit 75 amplifies, calibration circuit 76, digitized processing circuit 77 is connected with central processing unit 1, and the trigger end of multi-channel switch 74 is connected on the supporting single machine output end of institute.
Further improve for above system, embodiment is for the identical two parts metal detecting device 7R of structure, 7L all is by frequency conversion type high frequency signal generator circuit 71, driving circuit 72, transmit and receive coil groups 73, multi-channel switch 74, acquired signal amplifying circuit 75, calibration circuit 76, digitized processing circuit 77 is formed, after adjusting, driving circuit 72 delivers to the transmitting winding group emission by the high-frequency signal that frequency conversion type high frequency signal generator circuit 71 is produced, the signal that is collected by receiving coil amplifies to acquired signal amplifying circuit 75 through multi-channel switch 74, calibration circuit 76 amplitude limits, be converted into digital signal through digitized processing circuit 77 again and deliver to central processing unit 1 and analyze, the trigger end of multi-channel switch 74 is connected on the supporting single machine output end.
Comprise ADC mould/number conversion module and DSP digital signal processing module in digitized processing circuit 77 structures of above-described acquired signal, with upper module detected signal is converted into the coil impedance digital signal that changes with sweep frequency, and its result who compares with ideal value is sent to central processing unit 1.
Above-described high-frequency signal signal generating circuit 71 is to produce the dextrorotation ripple that scans by initial frequency of setting and step frequency by the Direct Digital synthesis chip, its frequency sweep variation range is 100KHZ, directly drive the transmitting coil emission through overdrive circuit 72, thereby set up the scanning electromagnetic field of the alternation of a regular variation of frequency at channel space.
In order further to improve resolution characteristic for tiny metal, the above emission is put punishment therein with the transmitting coil in the coil groups 73 that receives and is left transmitting coil TTL and right transmitting coil TTR, respectively by supporting driving circuit 72 driven in synchronism, receiving coil is divided into two group of received coils (THR, THL), symmetry, be evenly distributed on the vertical plane of security check passage framework, on the space of passage, form 16 zones and detect.
Also comprise adjustment loop D in the above receiving coil group (THR, THL) structure with the coaxial co-planar arrangement of each receiving coil.
In order to realize getting in touch of detector gate and command centre or main control room, remote-control receiving circuit (module) 6 of wireless regulating command of central processing unit 1 management transmission master-control room instruction down and 485 communicating circuits (module) 3 of teledata transmission are set in this comprehensive detector gate.
In this comprehensive detector gate two independently 8,9 times correspondences of single-chip microcomputer management system be provided with in order to handle statistical number of person and to survey the photosignal switch receiving circuit 13 and the photosignal switch radiating circuit 14 of passage rate.
In this comprehensive detector gate two independently the single-chip microcomputer management system be symmetrical arranged sensor and the treatment circuit 10,11 that is useful on the detection of radioactive article for 8,9 times, the signal that sensor and treatment circuit collect is sent into corresponding single-chip microcomputer and is handled after supporting treatment circuit is converted to digital signal.
The sensor of detection of radioactive article adopts Miller-Geiger tube in this comprehensive detector gate.
This channel type integrated detector gate also comprises the multi-region position warning indicating device (12,15) that is positioned at passage two surveys, and this warning indicating device is distributed in the both sides of passage, and this alarm lamp is corresponding with each position.Be used to indicate the position of carrying metal.Native system also is provided with the warning device 2 of voice class simultaneously, constitutes impedance matching network by voice generation chip, realizes audio alert by controlled driving circuit.
Channel type integrated detector gate comprises central processing unit 1, is to be made of the ATM64 single-chip microcomputer.Frequency conversion type high frequency signal generator here and processor adopting be AD5933.AD5933 is exactly a kind of typical integrated circuit (IC) chip, and it provides programmable frequency scanning generator and integrated ADC, and this ADC can work with excitation frequency and obtain response signal.And integrated exciting circuit and response treatment circuit.Adopt DDS to produce predetermined frequency sweep, highest frequency can reach 100kHz.By the ADC in the sheet its response wave shape is carried out digitizing then, and carry out discrete fourier transform (DFT), the real part and the imaginary values corresponding interface of each frequency sweep point are exported to central processing unit 1.Use these values just can calculate the amplitude and the phase information of response signal easily.Utilize above-mentioned DDS to produce predetermined frequency sweep frequency, this dextrorotation ripple drives transmitting coil 14 by driving circuit, produces the magnetic field that frequency rule changes.
Coil groups comprises transmitting coil TTL, TTR and a plurality of receiving coil THL, the THR of passage both sides mirror image symmetry.Transmitting coil TTL, link to each other, transmitting coil TTR, link to each other with the right driving circuit with the driving circuit on the left side, by the driving circuit synchronization motivationtheory to generate an alternating magnetic fields.Because the mutual coupling effect between transmitting coil TTL, the TTR, generated and had suitable uniform magnetic field density, magnetic field concentration is in passage.Owing to have uniform magnetic field, can carry out accurate metal object and detect, no matter its relative position in passage.Receiving coil THL, THR are symmetrically distributed in passage, and every side comprises 8 groups of coils, and each coil all links to each other with signal amplification circuit 75.And, the adjustment coil D with the coil arranged in co-axial alignment also is set in each receiving coil.In addition, the screen layer that respectively adds one deck ground connection on the both sides of transmitting coil TTL, TTR and receiving coil THL, THR suppresses main magnetic interference and radio frequency interference.Put adjustment loop D receiving coil THR by collaborative, THL and transmitting coil TTR, TTL makes receiving coil THR, and the sensitivity of THL has obtained enhancing.By adjusting, can produce magnetic field quite uniformly.The impedance of correspondence changes when the people carries the violated thing of metal by passage, corresponding receiving coil THR, and THL induces faint impedance variation.Can distinguish the combination of single big metalliferous material and a plurality of permission metalliferous materials by such multi partition structure.
Claims (9)
1, a kind of channel type integrated detector gate, comprise central processing unit (1) in the detector gate structure, by the warning device (2) under central processing unit (1) control, upper machine communication circuit (3), parameter adjustment keyboard (4), monitor lcd screen and driving circuit (5) thereof, remote-control receiving circuit (6), and the metal detection circuit (7) of the emission of electromagnetic field of high frequency and receiving coil group and supporting driving circuit and signal processing circuit composition, it is characterized in that: the emission of electromagnetic field of high frequency is that structure is identical with receiving coil group and supporting driving circuit (7) thereof, a left side, right symmetry, be vertically set on the passage both sides and form two parts metal detecting device (7R, 7L), two parts metal detecting device (7R, 7L) distinguish independently single-chip microcomputer management system (8 of supporting setting, 9), two single-chip microcomputer management systems (8 independently, 9) divide into two radioactivity prospecting assemblies (10 of being managed, 11) also be separately positioned on the passage both sides, single-chip microcomputer management system (8,9) is connected with central processing unit (1) through serial line interface.
2, channel type integrated detector gate according to claim 1, it is characterized in that: two parts metal detecting device (7R that structure is identical, all be 7L) by frequency conversion type high frequency signal generator circuit (71), driving circuit (72), transmit and receive coil groups (73), multi-channel switch (74), acquired signal amplifying circuit (75), calibration circuit (76), digitized processing circuit (77) is formed, the high-frequency signal output terminal of frequency conversion type high frequency signal generator circuit (71) is through driving circuit (72), multi-channel switch (74) is connected with the transmitting winding group that transmits and receives coil groups (73), the receiving coil group that transmits and receives coil groups (73) is through multi-channel switch (74), acquired signal amplifying circuit (75) amplifies, calibration circuit (76), digitized processing circuit (77) is connected with central processing unit (1), and the trigger end of multi-channel switch (74) is connected on the supporting single machine output end of institute.
3, channel type integrated detector gate according to claim 2, it is characterized in that: in digitized processing circuit (77) structure of acquired signal, include detected signal is converted into coil impedance digital signal with frequency change, and with its ADC that compares with ideal value mould/number conversion module and DSP digital signal processing module.
4, channel type integrated detector gate according to claim 2, it is characterized in that: the transmitting coil in the coil groups of described emission and reception (73) is put punishment therein and is left transmitting coil (TTL)) and right transmitting coil (TTR), be connected with supporting driving circuit (72) respectively, receiving coil is divided into two group of received coils (THR, THL), the symmetry, be evenly distributed on the vertical plane of security check passage framework, be divided into 16 surveyed areas on the space with passage.
5, channel type integrated detector gate according to claim 4 is characterized in that: also comprise the adjustment loop (D) with the coaxial co-planar arrangement of each receiving coil in described receiving coil group (THR, the THL) structure.
6, channel type integrated detector gate according to claim 1 is characterized in that: the remote-control receiving circuit (6) of wireless regulating command of central processing unit (1) management transmission master-control room instruction down and 485 communicating circuits (3) of teledata transmission are set in the comprehensive detector gate.
7, channel type integrated detector gate according to claim 1, it is characterized in that: in the comprehensive detector gate two independently single-chip microcomputer management system (8,9) down correspondence be provided with in order to handle statistical number of person and to survey the photo-electric signal receiving circuit (13) and the photosignal radiating circuit (14) of passage rate.
8, channel type integrated detector gate according to claim 1 is characterized in that: two independently are symmetrical arranged sensor and the treatment circuit (10,11) that is useful on the detection of radioactive article under the single-chip microcomputer management system (8,9) in the comprehensive detector gate.
9, channel type integrated detector gate according to claim 8 is characterized in that: the sensor (10,11) of detection of radioactive article adopts Miller-Geiger tube in the comprehensive detector gate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720172509XU CN201110898Y (en) | 2007-10-15 | 2007-10-15 | Duct type synthetic safety detecting door |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720172509XU CN201110898Y (en) | 2007-10-15 | 2007-10-15 | Duct type synthetic safety detecting door |
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| CN201110898Y true CN201110898Y (en) | 2008-09-03 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196479B (en) * | 2007-10-15 | 2010-12-08 | 深圳市赛时特科技有限公司 | Channel type integrated security check system |
| CN101504465B (en) * | 2009-03-17 | 2011-08-24 | 中国原子能科学研究院 | Novel security inspection door |
| CN101614823B (en) * | 2009-06-05 | 2011-09-28 | 上海市计量测试技术研究院 | On-site test device and test method of channel radioactive measurement and control system |
| CN102393537A (en) * | 2011-10-30 | 2012-03-28 | 北京无线电计量测试研究所 | Scan method of human body security system utilizing frequency division technology |
| CN102393536A (en) * | 2011-10-30 | 2012-03-28 | 北京无线电计量测试研究所 | Scanning method for human body security check system utilizing frequency division and space division |
| CN105842739A (en) * | 2016-06-15 | 2016-08-10 | 大同市快安科技有限公司 | Passing-through type specific metal detecting door |
| CN105891893A (en) * | 2016-03-28 | 2016-08-24 | 大同市快安科技有限公司 | Hand-held specific metal detector |
| CN106094047A (en) * | 2016-08-17 | 2016-11-09 | 中国电子科技集团公司第二十九研究所 | A kind of array safety inspection method based on magnetic abnormal detection and device |
| CN106226826A (en) * | 2016-08-31 | 2016-12-14 | 上海太易检测技术有限公司 | Subregion metal detection machine and subregion metal detection control method |
| CN107065022A (en) * | 2017-04-12 | 2017-08-18 | 武汉理工大学 | A kind of detector gate based on compensation Electromagnetic Testing Technology |
| CN111190232A (en) * | 2020-03-05 | 2020-05-22 | 大同市快安科技有限公司 | Metal contraband detection device and multi-parameter comprehensive judgment method thereof |
| CN113138423A (en) * | 2021-03-12 | 2021-07-20 | 中国科学院信息工程研究所 | Metal detection method and device |
-
2007
- 2007-10-15 CN CNU200720172509XU patent/CN201110898Y/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196479B (en) * | 2007-10-15 | 2010-12-08 | 深圳市赛时特科技有限公司 | Channel type integrated security check system |
| CN101504465B (en) * | 2009-03-17 | 2011-08-24 | 中国原子能科学研究院 | Novel security inspection door |
| CN101614823B (en) * | 2009-06-05 | 2011-09-28 | 上海市计量测试技术研究院 | On-site test device and test method of channel radioactive measurement and control system |
| CN102393537A (en) * | 2011-10-30 | 2012-03-28 | 北京无线电计量测试研究所 | Scan method of human body security system utilizing frequency division technology |
| CN102393536A (en) * | 2011-10-30 | 2012-03-28 | 北京无线电计量测试研究所 | Scanning method for human body security check system utilizing frequency division and space division |
| CN102393537B (en) * | 2011-10-30 | 2014-04-23 | 北京无线电计量测试研究所 | Scan method of human body security system utilizing frequency division technology |
| CN102393536B (en) * | 2011-10-30 | 2014-10-22 | 北京无线电计量测试研究所 | Scanning method for human body security check system utilizing frequency division and space division |
| CN105891893A (en) * | 2016-03-28 | 2016-08-24 | 大同市快安科技有限公司 | Hand-held specific metal detector |
| CN105842739A (en) * | 2016-06-15 | 2016-08-10 | 大同市快安科技有限公司 | Passing-through type specific metal detecting door |
| CN105842739B (en) * | 2016-06-15 | 2020-06-09 | 大同市快安科技有限公司 | Passing type specific metal detection door |
| CN106094047A (en) * | 2016-08-17 | 2016-11-09 | 中国电子科技集团公司第二十九研究所 | A kind of array safety inspection method based on magnetic abnormal detection and device |
| CN106226826A (en) * | 2016-08-31 | 2016-12-14 | 上海太易检测技术有限公司 | Subregion metal detection machine and subregion metal detection control method |
| CN106226826B (en) * | 2016-08-31 | 2019-05-31 | 上海太易检测技术有限公司 | Subregion metal detection machine and subregion metal detection control method |
| CN107065022A (en) * | 2017-04-12 | 2017-08-18 | 武汉理工大学 | A kind of detector gate based on compensation Electromagnetic Testing Technology |
| CN107065022B (en) * | 2017-04-12 | 2019-04-26 | 武汉理工大学 | A kind of detector gate based on compensation Electromagnetic Testing Technology |
| CN111190232A (en) * | 2020-03-05 | 2020-05-22 | 大同市快安科技有限公司 | Metal contraband detection device and multi-parameter comprehensive judgment method thereof |
| CN111190232B (en) * | 2020-03-05 | 2023-10-31 | 大同市快安科技有限公司 | Metal forbidden article detection device and multi-parameter comprehensive judgment method thereof |
| CN113138423A (en) * | 2021-03-12 | 2021-07-20 | 中国科学院信息工程研究所 | Metal detection method and device |
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