CN114280084B - Airport security inspection auxiliary method based on radio frequency signals - Google Patents
Airport security inspection auxiliary method based on radio frequency signals Download PDFInfo
- Publication number
- CN114280084B CN114280084B CN202111591469.3A CN202111591469A CN114280084B CN 114280084 B CN114280084 B CN 114280084B CN 202111591469 A CN202111591469 A CN 202111591469A CN 114280084 B CN114280084 B CN 114280084B
- Authority
- CN
- China
- Prior art keywords
- matrix
- signal
- security inspection
- basket
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides an airport security inspection auxiliary method based on radio frequency signals, which comprises the following steps: arranging a signal receiver at the bottom of a security inspection basket, arranging a signal transmitter above an airport security inspection conveyor belt, and arranging the security inspection basket on the airport security inspection conveyor belt; the signal transmitter transmits a signal to the signal receiver, and the signal receiver receives the signal and back scatters the signal; when the passenger carries luggage and places the luggage into an airport security inspection basket without suspected dangerous articles such as liquid, metal and the like and suspected drugs such as powder, tablets and the like, all grids of a warning display of a signal transmitter are displayed green, so that the safety of articles in the security inspection basket is indicated without further manual inspection; when dangerous goods appear in the security check basket, a red grid appears in the warning display of the signal transmitter, so that the existence of suspected dangerous goods in the passenger goods in the security check basket is indicated to be further checked by security check personnel. The invention can effectively assist airport security personnel to conduct security inspection, and the equipment is arranged in front of an X-ray machine, thereby meeting the application requirements of reducing the workload.
Description
Technical Field
The invention relates to the technical field of application of the Internet of things, in particular to an airport security inspection auxiliary method based on radio frequency signals.
Background
With the continuous development of the internet of things technology, more and more simple repeated operations can be replaced by machines, so that the burden of operators is reduced, and the working efficiency is improved. For example: in airport security inspection, most of the existing imaging modes are X-rays, the danger of objects needs to be observed manually through images, a large amount of manpower and material resources are consumed, if no dangerous objects are observed due to negligence of staff, potential safety hazards are likely to occur to flights, and therefore, the requirement of zero-error security inspection can lead to the increase of working pressure of the staff, the psychological burden is increased, the energy is wasted, and the risk of omission is increased.
Therefore, the airport security inspection auxiliary method based on the radio frequency signals is provided, and the security inspection accuracy is improved.
Disclosure of Invention
In order to solve the problems, the invention provides an airport security inspection auxiliary method based on radio frequency signals, which can effectively assist airport security inspection personnel to conduct security inspection, and the equipment is arranged in front of an X-ray machine, so that the application requirements of work load are reduced.
In order to achieve the above purpose, the present invention provides the following technical solutions.
An airport security inspection auxiliary method based on radio frequency signals comprises the following steps:
a plurality of signal receivers are uniformly arranged at the bottom of the security inspection basket, and signal transmitters are arranged on a bracket of the airport security inspection conveyor belt; when the security basket reaches the lower part of the bracket, the signal receiver receives the signal transmitted by the signal transmitter and back scatters the signal;
when no article exists in the security basket, the signal transmitter receives each back scattering signal and sets the back scattering signal as an initial numerical matrix R 0 ；
After articles are placed in the security basket, the signal emitter receives the backscatter signals and sets the backscatter signals as a numerical matrix R x The method comprises the steps of carrying out a first treatment on the surface of the Recording as a set default value when the backscatter signal cannot be received;
according to an initial numerical matrix R 0 And a numerical matrix R x Is obtained as a numerical matrix R y The method comprises the steps of carrying out a first treatment on the surface of the Matrix R y All elements in (a) are absolute value calculated as matrix R z ；
Matrix R z Solving standard deviation S of all elements in the method, determining a threshold value Q, and if the standard deviation is smaller than the threshold value Q, clearly appearing dangerous goods exist; if the standard deviation is greater than the threshold value Q, the following process is performed:
matrix R z The maximum value b of all elements in the matrix is calculated to obtain a numerical matrix R z The mean value a of the elements after the maximum value b is removed, and the numerical matrix R is obtained z Comparing all elements in (a) with the mean value a;
matrix the values R z Where all elements are 0, 1Rational, matrix R of values z Elements greater than or equal to a are marked as 1, elements less than a are marked as 0, and a numerical matrix M is obtained x ；
When the numerical matrix M x If the element in (a) is 0, no further inspection is required, and if the element is 1, a further inspection is required for the position corresponding to the element.
Preferably, the display device also comprises an alarm display; the positions of the lattices displayed in the warning display are displayed according to the actual positions of the signal receivers, and the number of the lattices depends on the number of the actually deployed signal receivers;
wherein matrix R z The standard deviation S of the elements is smaller than the threshold value Q, the warning display is completely green, and when the matrix M x When the element 1 appears, the suspected dangerous goods exist in the security inspection basket, a red grid appears on the warning display, red warning is carried out, and the appearance position of the red grid needs to be further inspected.
Preferably, the default value set when the backscatter signal cannot be received is-70 dB.
The invention has the beneficial effects that:
the airport security inspection auxiliary method based on the radio frequency signals provided by the invention utilizes different mediums to influence the transmission characteristics of the radio frequency signals, signal receivers are uniformly distributed in an airport security inspection basket, and when the security inspection basket is free of suspected dangerous goods such as liquid, metal and the like and suspected drugs such as powder, tablets and the like, a matrix R is provided z The standard deviation S of the elements is smaller than the threshold value Q, and when the security basket contains suspected dangerous articles such as liquid, metal and the like and suspected drugs such as powder, tablets and the like, the numerical matrix M is used for detecting the dangerous articles such as the liquid, the metal and the like x The existence element 1 indicates that the articles with suspected dangerous articles exist in the security inspection basket, the warning display can present red grid warning to remind security inspection personnel of further inspection, and the method is wholly accurate and stable, can effectively monitor the existence of dangerous articles, and lightens the application requirements of work load.
Drawings
FIG. 1 is a schematic diagram of the overall structure and experimental process of an embodiment of the present invention;
FIG. 2 is a schematic diagram of experimental results of an embodiment of the present invention.
In the figure, a 1-security inspection basket, a 2-signal receiver, a 3-security inspection equipment conveyor belt, a 4-signal transmitter, a 5-bracket and a 41-warning display.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the examples described herein are for illustrative purposes only and are not intended to limit the present invention.
Example 1
The invention relates to an airport security inspection auxiliary method based on radio frequency signals, which is shown in fig. 1 and specifically comprises the following steps:
s1: a plurality of signal receivers 2 are uniformly distributed at the bottom of the security inspection basket 1, and the signal receivers 2 are fixed at the bottom of the security inspection basket 1 by staff or are fixed at the bottom of the security inspection basket 1 in the processing process by security inspection basket manufacturers; a signal transmitter 4 is arranged on a bracket 5 of the airport security inspection conveyor belt 3;
s2: the signal transmitter 4 transmits signals to the signal receiver 2, the signal value of the backscattering of the signal receiver 2 acquired by the signal transmitter 4 changes due to the influence of different mediums on electromagnetic waves, the signal receiver 2 receives signals and backscatters the signals along with the placement of articles in the security basket 1, the signal transmitter 4 receives the backscattering signals, and the signal receiver 2 is recorded as a default value of-70 dB when the signal receiver 2 cannot receive the signals from the signal transmitter 2;
s3: when the security basket 1 is free of any articles, the signal emitter 4 receives the backscatter signals and sets the backscatter signals as an initial numerical matrix R 0 。
S4: after articles are placed in the security basket 1, the signal emitter 4 receives the back scattering signals to change and set the back scattering signals as a numerical matrix R x . S5: according to an initial numerical matrix R 0 And a numerical matrix R x Is obtained as a numerical matrix R y The method comprises the steps of carrying out a first treatment on the surface of the Solving absolute values of all elements in matrix Ry to obtain matrix R z The method comprises the steps of carrying out a first treatment on the surface of the Matrix R z Solving standard deviation S of all elements in the method, determining a threshold value Q, and if the standard deviation is smaller than the threshold value Q, clearly appearing dangerous goods exist; if it isIf the standard deviation is greater than the threshold value Q, the following process is performed.
S6, solving a matrix R z Calculating the maximum value b of all elements in the matrix of values Rz to obtain the average value a of the elements remaining after the maximum value b is removed, and obtaining the matrix of values R z Comparing all elements in (a) with the mean value a;
s7: matrix the values R z All elements in the matrix are subjected to 0 and 1 conversion treatment, and the numerical matrix R is obtained z Elements greater than or equal to a are marked as 1, elements less than a are marked as 0, and a numerical matrix M is obtained x ；
When the numerical matrix M x If the element in (a) is 0, no further inspection is required, and if the element is 1, a further inspection is required for the position corresponding to the element.
Further, an alarm display 41 is included; the positions of the lattices displayed in the warning display 41 are displayed according to the actual positions of the respective signal receivers 2, and the number of lattices depends on the number of actually deployed signal receivers 2; wherein matrix R z If the standard deviation S of the elements is smaller than the threshold value Q, the warning display 41 is completely green, and the matrix M x When element 1 appears, it indicates that suspected dangerous articles exist in the security basket 1, the warning display 41 can appear red grids, red warning is carried out, and the positions where the red grids appear need to be further checked.
Specific examples:
in the actual test, the spray, the paper towel, the alcohol, 150ml of the cleansing oil and the fruit knives are respectively placed at the positions 1, 3, 4, 8 and 9 labels, and the obvious fluctuation of the label energy values at the positions 1, 4, 8 and 9 is found through experiments, so that suspected boarding contraband is proved to exist; the common paper extraction is placed at the position 3, so that no danger exists, and the fluctuation of energy values is small, and the method is proved to be capable of distinguishing dangerous objects. The specific experimental results are shown in fig. 2, and the calculation process is as follows:
measured energy value of the tag without any items in the security basket:
the energy values measured at the position 1, position 3, position 4, position 8 and position 9 tags were placed with spray, paper towel, alcohol, 150ml of make-up removal oil, and fruit knives, respectively:
initial numerical matrix R 0 And a numerical matrix R x Obtain a matrix of values for the differences of:
matrix R y Absolute value of all elements in (a) is calculated as a matrix:
matrix R z The maximum value b=36.5 of all elements in (a) is calculated to obtain a numerical matrix R z The mean value a=13.75 of the elements after removal of the maximum value b, the value matrix R z Comparing all elements in (a) with the mean value a;
matrix the values R z All elements in the matrix are subjected to 0 and 1 conversion treatment, and the numerical matrix R is obtained z Elements greater than or equal to a are marked as 1, elements less than a are marked as 0, and a numerical matrix is obtained:
the specific model of the electronic component in this embodiment is not specifically specified, and all the electronic components can be commercially available common products, so long as the use requirement of the present invention can be met, the number and the position of the grids of the warning display are determined according to the actual number and the position of the signal receivers, and the number and the position of the grids of the warning display can be adjusted according to the actual situation.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The airport security inspection auxiliary method based on the radio frequency signals is characterized by comprising the following steps of:
a plurality of signal receivers (2) are uniformly arranged at the bottom of the security inspection basket (1), and a signal transmitter (4) is arranged on a bracket (5) of the airport security inspection conveyor belt (3); when the security basket (1) reaches the lower part of the bracket (5), the signal receiver (2) receives the signal transmitted by the signal transmitter (4) and back scatters the signal;
when the security basket (1) is free of any articles, the signal emitter (4) receives the backscatter signals and sets the backscatter signals as an initial numerical matrix R 0 ；
After articles are put in the security basket (1), the signal emitter (4) receives the backscatter signals and sets the backscatter signals as a numerical matrix R x The method comprises the steps of carrying out a first treatment on the surface of the Recording as a set default value when the backscatter signal cannot be received;
according to an initial numerical matrix R 0 And a numerical matrix R x Is obtained as a numerical matrix R y The method comprises the steps of carrying out a first treatment on the surface of the Matrix R y All elements in (a) are absolute value calculated as matrix R z ；
Matrix R z Solving standard deviation S of all elements in the method, determining a threshold value Q, and if the standard deviation is smaller than the threshold value Q, clearly appearing dangerous goods exist; if the standard deviation is greater than the threshold value Q, the following process is performed:
matrix R z The maximum value b of all elements in the matrix is calculated to obtain a numerical matrix R z The average value a of the residual elements after removing the maximum value b is calculated as a numerical matrix R z Comparing all elements in (a) with the mean value a;
matrix the values R z All elements in the matrix are subjected to 0 and 1 conversion treatment, and the numerical matrix R is obtained z Elements greater than or equal to a inThe elements smaller than a are marked as 1 and 0, and a numerical matrix M is obtained x ；
When the numerical matrix M x If the element in (1) is 0, no further inspection is needed, and if the element is 1, the position corresponding to the element is required to be further inspected;
also comprises a warning display (41); the positions of the lattices displayed in the warning display (41) are displayed according to the actual positions of the signal receivers (2), and the number of the lattices depends on the number of the actually deployed signal receivers (2);
wherein matrix R z The standard deviation S of the elements is smaller than the threshold value Q, the warning display (41) is completely green, and when the matrix M x When the element 1 appears, the suspected dangerous goods exist in the security basket (1), a red grid appears on the warning display (41), a red warning is carried out, and the appearance position of the red grid needs to be further checked.
2. The radio frequency signal based airport security inspection system of claim 1, wherein the default value set when the backscatter signal cannot be received is-70 dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591469.3A CN114280084B (en) | 2021-12-23 | 2021-12-23 | Airport security inspection auxiliary method based on radio frequency signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591469.3A CN114280084B (en) | 2021-12-23 | 2021-12-23 | Airport security inspection auxiliary method based on radio frequency signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114280084A CN114280084A (en) | 2022-04-05 |
| CN114280084B true CN114280084B (en) | 2023-09-08 |
Family
ID=80874662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111591469.3A Active CN114280084B (en) | 2021-12-23 | 2021-12-23 | Airport security inspection auxiliary method based on radio frequency signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114280084B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5600303A (en) * | 1993-01-15 | 1997-02-04 | Technology International Incorporated | Detection of concealed explosives and contraband |
| US6269142B1 (en) * | 1999-08-11 | 2001-07-31 | Steven W. Smith | Interrupted-fan-beam imaging |
| CN102565794A (en) * | 2011-12-30 | 2012-07-11 | 北京华航无线电测量研究所 | Microwave security inspection system for automatically detecting dangerous object hidden in human body |
| EP2910980A1 (en) * | 2014-02-24 | 2015-08-26 | Tsinghua University | Human body back scatterning inspection method and system |
| KR101720732B1 (en) * | 2015-10-21 | 2017-04-03 | 김경수 | Apparatus for detecting dangerous liquid material |
| WO2017092395A1 (en) * | 2015-12-04 | 2017-06-08 | 同方威视技术股份有限公司 | Security inspection device and ray detection method |
| CN206479654U (en) * | 2016-12-14 | 2017-09-08 | 南京正驰科技发展有限公司 | A kind of safe examination system based on Terahertz Technology |
| CN110458228A (en) * | 2019-08-09 | 2019-11-15 | 成都理工大学 | A kind of hazardous material detection method of information source number time-varying and self-adaptive blind source separation |
| DE102018132033A1 (en) * | 2018-12-13 | 2020-06-18 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Method and system for detecting at least one hazardous substance |
| CN111665572A (en) * | 2020-05-30 | 2020-09-15 | 中国船舶重工集团公司第七一三研究所 | Airport passenger security inspection intelligent auxiliary system and method based on X-ray machine image |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7550969B2 (en) * | 1997-06-26 | 2009-06-23 | University Of Utah Research Foundation | Security screening and inspection based on broadband electromagnetic holographic imaging |
| US8068049B2 (en) * | 2005-11-09 | 2011-11-29 | Qinetiq Limited | Passive detection apparatus |
| US7796733B2 (en) * | 2007-02-01 | 2010-09-14 | Rapiscan Systems, Inc. | Personnel security screening system with enhanced privacy |
| US9453936B2 (en) * | 2011-06-06 | 2016-09-27 | Steven Winn Smith | Body scanner with improved x-ray transmission imaging |
| US20120314836A1 (en) * | 2011-06-08 | 2012-12-13 | Steven Winn Smith | X-ray Shoe Inspection |
| US9697710B2 (en) * | 2012-06-20 | 2017-07-04 | Apstec Systems Usa Llc | Multi-threat detection system |
-
2021
- 2021-12-23 CN CN202111591469.3A patent/CN114280084B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5600303A (en) * | 1993-01-15 | 1997-02-04 | Technology International Incorporated | Detection of concealed explosives and contraband |
| US6269142B1 (en) * | 1999-08-11 | 2001-07-31 | Steven W. Smith | Interrupted-fan-beam imaging |
| CN102565794A (en) * | 2011-12-30 | 2012-07-11 | 北京华航无线电测量研究所 | Microwave security inspection system for automatically detecting dangerous object hidden in human body |
| EP2910980A1 (en) * | 2014-02-24 | 2015-08-26 | Tsinghua University | Human body back scatterning inspection method and system |
| KR101720732B1 (en) * | 2015-10-21 | 2017-04-03 | 김경수 | Apparatus for detecting dangerous liquid material |
| WO2017092395A1 (en) * | 2015-12-04 | 2017-06-08 | 同方威视技术股份有限公司 | Security inspection device and ray detection method |
| CN206479654U (en) * | 2016-12-14 | 2017-09-08 | 南京正驰科技发展有限公司 | A kind of safe examination system based on Terahertz Technology |
| DE102018132033A1 (en) * | 2018-12-13 | 2020-06-18 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Method and system for detecting at least one hazardous substance |
| CN110458228A (en) * | 2019-08-09 | 2019-11-15 | 成都理工大学 | A kind of hazardous material detection method of information source number time-varying and self-adaptive blind source separation |
| CN111665572A (en) * | 2020-05-30 | 2020-09-15 | 中国船舶重工集团公司第七一三研究所 | Airport passenger security inspection intelligent auxiliary system and method based on X-ray machine image |
Non-Patent Citations (1)
| Title |
|---|
| An Analytical Solution for Backscatter Tomography;William G Hawkins;《Tsinghua Science & Technology》;第15卷(第1期);第62-67页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114280084A (en) | 2022-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6218943B1 (en) | Contraband detection and article reclaim system | |
| CN103817086B (en) | Lane device and baggage sorting method are controlled in baggage sorting footpath | |
| Gilmore et al. | Industrial scale electromagnetic grain bin monitoring | |
| CN106290416B (en) | X-ray food foreign matter detection system | |
| US20150177114A1 (en) | System and method of monitoring particulate storage | |
| WO2005086616A3 (en) | Method and apparatus for improving baggage screening examination | |
| CN104865281B (en) | Human body back scattering inspection method and system | |
| CN107202808A (en) | A kind of double source double-visual angle safety inspection method and its system | |
| CN114280084B (en) | Airport security inspection auxiliary method based on radio frequency signals | |
| CN107037493A (en) | Safety check system and method | |
| CN202177920U (en) | Online monitoring system for food safety | |
| IN2015DN03903A (en) | ||
| CN208092890U (en) | Warehouse monitors and management system | |
| CN206057598U (en) | A kind of safe examination system for monitoring record X-ray screening machine process | |
| JP5898472B2 (en) | Inspection equipment | |
| CN108764388A (en) | A kind of airdrome luggage label tracing system | |
| CN206882178U (en) | Multi-functional automatically identifying and reading RFID shields tunnel machine | |
| CN206292821U (en) | Drawing system is sentenced in article safety check | |
| CN107497704A (en) | A kind of section bar on-line monitoring equipment | |
| CN206161564U (en) | X ray food foreign matter detecting system | |
| CN108535033A (en) | Virtual-sensor and its health monitoring intelligent decision system | |
| Demaurex et al. | Detection of physical hazards | |
| CN108163434A (en) | A kind of intelligent repository controlled by communication device | |
| CN115421101A (en) | Aerial work safety belt detection system and detection method thereof | |
| CN202393349U (en) | Device for quickly detecting planeness of sectional materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |