JP2011174746A - Security screening system, and security screening method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a security screening system capable of sharply improving throughput while setting the lowering of the determining precision of security properties to a tolerance range. <P>SOLUTION: An examinee ID is individually acquired from a large number of respective examinees SB by an ID acquiring part 100, one specimen SM prepared by mixing a plurality of groups GR each of which comprises a small number of the examinees SB is extracted in a specimen extraction part 110, one specimen SM mixed at every groups GR to be extracted is inspected by a specimen inspection part 120 and the security properties of the groups GR are determined from the inspection result of the mixed and inspected specimen SM by a group determining part 130. One determination result of the security properties at every groups GR and the examinee ID of a plurality of the examinees SB are allowed to correspond to each other by a result corresponding part 140. Accordingly, the extraction and inspection of the specimen SM and the determination of the security properties are executed at every groups GR comprising a small number of the examinees SB but not at every a large number of the examinees SB. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a security screening system and a security screening method for determining security of a large number of subjects.

  In recent years, there have been various activities such as terrorism using explosives and firearms, distribution of prohibited drugs such as stimulants and narcotics, outbreaks of new influenza and unknown infectious agents, food contamination, air pollution, water pollution, etc. The existence of threats threatens safe and secure social life.

  What countermeasures and measures to deal with are becoming an important issue. If the target of the threat is a substance, it is one of the practical means to take measures to prevent or suppress it by detecting the substance with high sensitivity.

  Currently, methods for inspecting and detecting trace amounts of substances include X-ray fluorescence analysis, mass spectrometer (MS), ion mobility spectrometry (IMS), gas chromatography (GC: Gas Chromatography), Liquid Chromatography (LC), chemiluminescence using chemical reaction, chemical staining, immunochromatography using bioreactive substances such as antibodies, enzymes and aptamers, enzyme immunoassay (ELISA) ) Method, Quartz Crystal Microbalance (QCM) method, surface acoustic wave (SAW) sensor, bioluminescence method, sintered semiconductor method, constant potential electrolytic method, galvanic method, infrared There are a wide variety of methods, including various gas sensors such as absorption type (hereinafter collectively referred to as trace amounts). Referred to as test method. Further, it referred to apparatus for performing the inspection and trace substance inspection apparatus).

  From these methods, it is possible to select a highly effective method according to various detection target substances. For example, IMS, chemical staining, MS, etc. are used for the purpose of inspecting substances such as explosives and narcotics. It has been.

  In addition, methods such as immunochromatography are used to detect influenza viruses and pathogens, and methods such as GC and LC are used for various pollutants.

  Currently, the technology that inspects the baggage in a non-contact and high-rate manner to collect particulate shape substances attached to the baggage and inspects whether the baggage is dangerous or has a specific sample substance attached, and simplification of such an inspection. There are also proposals aimed at automation.

  The adhering substance inspection apparatus sprays a compressed gas to an inspection object to which a sample substance adheres, collects the separated sample substance with a collection filter, and the sample substance collected on the collection filter A baggage delivery unit that delivers baggage to the inspection unit, and a transport unit that transports the collection filter from the collection unit to the inspection unit (Patent Document 1).

  In addition, the detection sensitivity of the dangerous goods detection device is not sufficient, and when the vapor pressure of the dangerous goods is low or the amount of dangerous goods is very small, it is a disadvantage of the prior art that it cannot be detected unless a concentration process is provided. Techniques aimed at eliminating the problem have also been proposed.

  In this technology, dangerous substances represented by nitro compounds are efficiently ionized using negative corona discharge, and the generated negative ions are detected with high sensitivity using a mass spectrometer. By detecting the dangerous substance vapor with high sensitivity, the presence or absence of the dangerous substance can be determined at high speed (Patent Document 2).

  There are also proposals for a security gate system and security gate control technology that can inspect a test object in a short time and with high accuracy. In this technology, a main passage, a mass analyzer that analyzes a sample (for example, a ticket) acquired from an inspection target (for example, a facility user such as an airport) that moves in the main passage, and a moving direction of the inspection target from the sample acquisition position. At least one branch passage branched from the main passage on the downstream side, a plurality of gates provided at a branch portion of the branch passage for switching the flow to be inspected, and a plurality of gates based on the analysis result by the mass analyzer And a control device that controls switching (Patent Document 3).

WO2006-097990 JP 2000-028579 A JP 2007-187467 A

  However, there are some problems in actually using the trace substance inspection method for security screening.

  For example, at airports where security measures are highly needed, dangerous goods inspection using X-ray transmission images is basically performed for all passengers and all luggage, and dangerous goods inspection using metal detectors is performed for all passengers. Yes. On the other hand, the current situation is that only the extracted sample is inspected by IMS, MS, or a chemiluminescent detector that physically detects the regulated substance.

  This is because the time required for the measurement is long, so even if one measuring device is placed per gate, the number of people passing through cannot be inspected. This is because there is a problem that it is difficult to prepare. Therefore, despite the existence of devices and techniques that detect substances that can become threats with high sensitivity, complete security screening cannot be performed.

  In this way, not only in the case of airports, but as a problem that must be solved in order to apply various trace substance inspection methods to security screening, firstly, the inspection time takes more than the required throughput. A point is mentioned.

  The inspection time includes the time to collect samples and the time to perform mutual communication with the database for authentication of individuals and individuals in order to process and determine the inspection results. There are many aspects in which it is difficult to expect significant shortening because elements that are in a trade-off relationship with accuracy improvement are included.

  The second is the problem of inspection costs. This includes the cost required for the introduction of the equipment required for inspection and the cost of consumables that increases in proportion to the number of samples actually inspected.

  The third problem is a problem that easily occurs when a very small amount of substance is inspected with high sensitivity. Normally, when performing high-sensitivity inspections in laboratories, care should be taken to prevent samples from mixing, such as by carefully washing the instruments that come into contact with each sample or using disposable instruments. .

  However, when used for security screening, since it is required to process a large number of samples continuously, it is difficult to clean or replace all instruments for each sample in terms of throughput and cost. Therefore, in practice, there is a problem that there is a possibility that the sample may be mixed between successive examinations due to the existence of a common instrument or insufficient purge of the sample.

  The present invention has been made in view of the above-described problems, and provides a security screening system and a security screening method capable of greatly improving throughput.

  The security screening system of the present invention includes an ID acquisition unit that individually acquires a subject ID from each of a large number of subjects, and a sample extraction unit that extracts a sample mixed together for each of a plurality of groups of a small number of subjects. , Sample testing means for testing samples that are mixed and extracted for each group, group determination means for determining the security of the group from the test results of the mixed and tested samples, and security for each group And a result corresponding means for associating one determination result with subject IDs of a plurality of subjects.

  The security screening method of the present invention obtains a subject ID individually from each of a large number of subjects, extracts a sample mixed together for each of a plurality of groups of a small number of subjects, and mixes them for each group. The extracted samples are tested, the security of the group is determined from the test results of the mixed and tested samples, and one security determination result is associated with the subject IDs of a plurality of subjects for each group. .

  It should be noted that the various components of the present invention need only be formed so as to realize their functions. For example, dedicated hardware that exhibits a predetermined function, data processing in which a predetermined function is provided by a computer program It can be realized as an apparatus, a predetermined function realized in the data processing apparatus by a computer program, an arbitrary combination thereof, or the like.

  The various components of the present invention do not necessarily have to be independent of each other. A plurality of components are formed as a single member, and a single component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps with a part of another component, or the like.

  In the security screening method of the security screening system of the present invention, the ID acquisition means individually acquires the subject ID from each of a large number of subjects. The sample extraction means extracts the sample mixed together for each of a plurality of groups of a small number of subjects. The specimen testing means examines the specimens mixed and extracted for each group. The group determination means determines the security of the group from the test results of the mixed and tested samples. For each group, the result correspondence means associates one security determination result with the subject IDs of a plurality of subjects. For this reason, sample extraction, examination, and security determination are performed not for each of a large number of subjects but for each group of a small number of subjects. Accordingly, it is possible to significantly improve the throughput while keeping the deterioration of the security determination accuracy within an allowable range.

It is a typical block diagram which shows the logic structure of the security screening system of this invention. It is a schematic diagram which shows the specific example of the security screening method of the security screening system of the 1st embodiment of this invention. It is a schematic diagram which shows the specific example which makes the combination of the test subject of a group differ by two gates. It is a time chart which shows the rough estimate of the time required for the security screening with respect to all the n subjects. FIG. 6 is a characteristic diagram showing the relationship between the amount of a trace substance and time when the trace substance test is continuously repeated using a mass spectrometer that is a trace substance test apparatus of the security screening system according to the second embodiment of the present invention. is there.

  An embodiment of the present invention will be described below with reference to the drawings. The security screening system 1000 according to the present embodiment includes an ID acquisition unit 100 that individually acquires a subject ID from each of a large number of subjects SB and a sample that is mixed together for each of a plurality of groups GR including a small number of subjects SB. Security of the group GR based on the sample extraction unit 110 that extracts the SM, the sample testing unit 120 that tests the sample SM that is mixed and extracted for each group GR, and the test results of the sample SM that is mixed and tested A group determination unit 130 that determines sex, and a result correspondence unit 140 that associates one security determination result SJ with subject IDs of a plurality of subjects SB for each group GR.

  Further, as will be described in detail later, the security screening system 1000 according to the present embodiment extracts a sample SM that is mixed into one from a plurality of groups GR with different combinations of subjects SB by a plurality of sample extraction units 110. . Furthermore, the test subject SB further has gates 210 and 220 through which the specimen extraction unit 110 is installed in the gates 210 and 220.

  In the configuration as described above, in the security screening system 1000 of the present embodiment, when the subject SB passes through the test gates 210 and 220, the sample SM is collected, and is transported to the trace substance test apparatus, A combination of a subject ID and a mixed sample ID is created and recorded on a recording medium for information management. As a result, subject IDs corresponding to the number of mixtures correspond to one mixed specimen ID.

  The subject ID acquisition means reads from a paper medium, a barcode, a magnetic tape, an electronic recording medium, etc., on which a unique management number of the subject SB is recorded, using an image sensor or a wireless communication means, When the subject SB is a person, a method of reading biometric authentication information such as fingerprints, palm prints, vein patterns, iris patterns, gene sequences, faces, etc. with a dedicated device can be used.

  Further, in addition to the subject ID, it is not information unique to the subject SB, such as size, weight, color, smell, etc., but supplementary information regarding features can be recorded in combination. When the subject SB is a person, sex, age, race, clothes, and the like can be recorded as supplementary information (hereinafter, these are referred to as supplementary information).

  Furthermore, using the acquired subject ID and its supplementary information, data corresponding to or possibly corresponding to the corresponding subject SB from the already existing database, for example, a test result of a trace substance already performed In addition, other information that can influence the determination of security screening can be extracted, and the information (hereinafter referred to as DB information) can be recorded in combination with the subject ID or the mixed sample ID.

  As described above, in the security screening method of the present embodiment, when the subject SB passes the test gates 210 and 220, a combination of the subject ID and the mixed sample ID is created, and at the same time, supplementary information and DB information are stored in the subject. It is given to ID.

  Furthermore, after the time necessary for obtaining the test result of the trace substance has elapsed, trace substance information is given to the mixed specimen ID. The security screening is determined every time supplementary information, DB information, or trace substance information is added.

  Specifically, the judgment indicators such as risk level and safety level specified in advance increase or decrease as each type of information is added, and give a comprehensive judgment result when it exceeds or falls below a certain threshold. , Etc. can be taken.

  In some cases, it can be considered that only when the subject SB first passes through the inspection gates 210 and 220 and the first trace substance information does not exist, a comprehensive determination is made only with supplementary information and DB information. Specifically, the trace substance information greatly affects the determination index.

  In the security screening method of the present embodiment, the effect can be further enhanced by arranging all the subjects SB to pass through the inspection gates 210 and 220 twice or more.

  When a comprehensive determination is made with only one test gate 210, 220, each trace substance information includes at least the number of specimens SM from the subject SB, so for example in security screening such as a survey by an inspector. When processing is performed, all the subjects SB corresponding to the number of the mixture are targeted.

  On the other hand, all the subjects SB are arranged so as to pass through the second test gates 210 and 220, and each subject SB corresponding to the same mixed sample ID in the first test is assigned to a different mixed sample ID in the second test. If it arrange | positions so that it may respond | correspond, the test subject SB candidate who has significant trace substance information can be extracted uniquely.

  For example, the assignment of the subjects SB may be naturally distributed without special considerations such that the test is distributed to the different mixed sample IDs in the second test. Depending on the degree of dispersion, the number of candidates for the subject SB who have significant trace substance information can be made smaller than the number of mixtures.

  As described above, the security screening method of the present embodiment realizes an improvement in effective throughput and a reduction in inspection cost by superimposing a plurality of specimens SM on a single inspection of a trace substance. is there.

  Even if the test noise level increases as a result of mixing multiple specimens SM, use a method that can inspect trace substances with a high signal-to-noise ratio (S / N) that compensates for it, and also mix specimens SM In combination with the provision of an information system for managing the composite of information accompanying the above, and the provision of a plurality of inspection gates 210 and 220 for narrowing down target information such as a specific subject ID from the composite information. Such security screening can be realized.

  Further, in the security screening method of the present embodiment, in order to inspect a very small amount of substance with as high sensitivity as possible, when a plurality of specimens SM are mixed even a little, the substance that does not originally exist and is mixed in as a result of mixing is also detected. , There is a possibility of producing a significant detection result.

  Ideally, a mechanism that does not mix the sample SM should be created. However, in practice, in order to suppress a decrease in throughput and an increase in cost, it is practical to construct a mechanism that allows a certain amount of sample SM to be mixed. Will lead to increased effectiveness.

  Therefore, in the security screening method of the present embodiment, one subject ID can be recorded in association with one or more mixed specimen IDs. For example, this is effective when the possibility of mixing two specimens SM cannot be excluded when switching between the nth and (n + 1) th mixed specimens SM.

  For example, the subject ID corresponding to the n-th mixed sample SM may be associated with one or more n + 1 or more mixed sample IDs collected after the time when the n-th sample SM is acquired. Depending on the time, one or more mixed specimen IDs before the (n-1) th time may be associated with each other, so that even when mixing occurs between the mixed specimens SM, information is not leaked. Can be reflected in the screening results.

  Actually, when collecting the trace substance information for a certain subject ID, for example, reference is made to the mixed specimen IDs from the (n−1) th to the (n + 2) th, and the trace substance information given to each mixed specimen ID is referred to. It is preferable to determine an optimized mechanism such as adopting a total of products obtained by multiplying predetermined coefficients as the trace substance information for the subject ID.

  In order to further enhance this mechanism, the specimen ID and the mixed specimen ID are combined with the acquisition time information, and by preparing a formula for integrating the trace substance information by quoting the difference in the time information, the specimen is prepared. It is possible to calculate trace substance information that reflects the possibility of mixing SM in a form that is closer to the actual situation.

  In the security screening method of the security screening system 1000 according to the present embodiment, the ID acquisition unit individually acquires the subject ID from each of the many subjects SB.

  The sample extraction unit 110 extracts the sample SM mixed together for each of the plurality of groups GR made up of a small number of subjects SB. The sample inspection unit 120 inspects the sample SM mixed and extracted for each group GR.

  The group determination unit 130 determines the security of the group GR from the test result of the sample SM that has been mixed and tested. For each group GR, the result correspondence unit 140 associates one determination result of security with the subject IDs of the plurality of subjects SB.

  For this reason, sample SM extraction, examination, and security determination are performed for each group GR including a small number of subjects SB, not for a large number of subjects SB. Accordingly, it is possible to significantly improve the throughput while keeping the deterioration of the security determination accuracy within an allowable range.

  The security screening system 1000 of the present embodiment will be described below more specifically with reference to FIGS. The security screening system 1000 according to the present embodiment is used, for example, for trace substance inspections of articles that are prohibited from being taken out / taken out for passengers and luggage at airports.

  FIG. 2 is a schematic diagram showing a security screening method of the security screening system 1000 of the present embodiment. In the present embodiment, the subject SB is inspected for trace substances in the first and second two gates 210 and 220, and the result is comprehensively determined to determine whether or not it can pass.

  Here, the subject SB indicates one of the passenger himself, carry-on baggage, checked baggage, or a combination of two or more of the three. First, when the first subject SB reaches the first gate 210, the gate waiting for the examination request automatically senses the approach of the subject SB and starts collecting the mixed sample SM.

  The collected sample SM is directly introduced into the inspection apparatus and waits for the start of the inspection. Appropriate methods for acquiring the specimen SM from each subject SB include a method of collecting gas molecules emitted from the subject SB and molecules adsorbed to dust by generating an intentional air flow, A method of wiping off a substance adsorbed on SB can be used.

  At the same time, a subject ID corresponding to the subject SB is acquired. The subject ID can be obtained from a boarding pass, passport, credit card, or the like. In addition, biometric authentication information such as fingerprints, palm prints, vein patterns, iris patterns, gene information, and faces can be read using a dedicated device.

  When the subject SB is a passenger, sex, age, race, clothes, etc. are recorded as supplementary information as appropriate. In the case of a package, it is not information unique to the subject SB, such as weight, size, color, etc., but supplementary (supplemental information) information about features is recorded in combination. To obtain supplemental information, photos and video images are analyzed and automatically added to the supplemental information.

  Furthermore, the database which already exists is inquired using subject ID and its supplementary information. From the data corresponding to or possibly corresponding to the subject SB, for example, the test results of the trace substances already performed and other information that may affect the judgment of the security screening are extracted, and the information ( (Hereinafter referred to as DB information) is recorded in combination with the subject ID.

  The maximum number of mixtures of the mixed sample SM and the longest waiting time from when the mixed sample SM is acquired until the test is performed are determined in advance as the set number and the set time, respectively. If none of the sample SMs has reached the set value after acquiring the sample SM, the next sample SM is awaited.

  When either reaches the set value, the mixed sample ID is acquired for the mixed sample SM acquired at that time, and acquisition of trace substance information is started.

  In this embodiment, a trace substance detection apparatus based on luminol chemiluminescence is used as the trace substance inspection apparatus. From the subject SB, gas was collected as the specimen SM, and the mixed specimen SM was accumulated by bubbling or spraying the solution in the reaction container. Samples SM were collected from each subject SB for 10 seconds, during which an average of 10 liters of gas was collected.

  For the obtained mixed specimen SM, a substrate showing a chemiluminescent reaction by reacting with a specific functional group such as a nitro group was added, and the luminescence intensity from the mixed specimen SM was measured using a photon counter. The inspection time was 5 minutes.

  Each specimen SM moved to the second gate 220 immediately after the acquisition of the specimen SM at the first gate 210, and the second examination was performed in the same manner. Prior to performing the second examination, the sample SM acquired from each subject SB was intentionally changed when the sample SM was assigned to the mixed sample SM. As an example, FIG. 3 shows a schematic diagram illustrating a case where a test is performed with all 16 specimens SM having a mixture number of 4.

  First, in the first gate 210, a mixed sample is acquired for the subjects SB corresponding to one horizontal row with the subject IDs 1 to 4, and the remaining 12 subjects SB are also arranged for each of the four subjects SB side by side. The sample SM is obtained and the trace substance is inspected in a form corresponding to one mixed sample ID.

  Next, at the time of the test at the second gate 220, the rearrangement is performed so that the test subjects SB assigned to the same mixed sample SM in the first test are assigned different mixed samples SM.

  In the first examination, when a trace substance of a reference amount or more is detected from a certain mixed specimen SM, there are four subjects SB suspected of possessing the trace substance. By assigning people to different mixed specimens SM, it is possible to narrow down the subjects SB.

  In addition, the subjects SB can be narrowed down according to any degree of dispersion without reassigning the subjects SB assigned to the same mixed sample SM in the first examination so as to be completely exclusive. is there.

  FIG. 4 is a diagram showing an estimate of the time required for security screening for all n subjects SB. FIG. 4 (1) shows the time required for testing all n subjects SB once. In one inspection, a time required for the time Ts required for obtaining the specimen SM and the time Tt required for the actual inspection is required.

Therefore, the total inspection time is
n (Ts + Tt)
It becomes.

  On the other hand, in FIG. 4B according to the method of the present embodiment, the examination is performed by distributing n subjects SB to m mixed samples SM. Therefore, the time required for the inspection of one mixed specimen SM is the sum nTs / m + Tt of Ts of the number of mixtures n / m and Tt for one time.

If there are m mixed specimens SM and each test is performed twice, the total test time is 2 nTs + 2 mTt.
It becomes.

In order for the method of this example to have an effect of reducing time,
n (Ts + Tt)> 2nTs + 2mTt
Therefore,
(N-2m) / n> Tt / Ts
If it is.

  For example, when examination (1) is performed on 100 subjects SB, if Ts is 10 seconds and Tt is 300 seconds, a total of 31000 seconds (8 hours and 36 minutes) is required, whereas examination is performed. In the method (2), when the test is performed twice by dividing 10 test samples SB per 10 mixed samples SM into 10 mixed samples SM, the process is completed in a total of 8000 seconds (about 2 hours and 13 minutes).

  Since the number of inspections is 100 for inspection (1) and 20 for inspection (2), the consumable cost required for one inspection is 1/5.

  Next, a second embodiment of the present invention will be described in detail with reference to FIG. The present embodiment relates to a trace substance inspection of articles prohibited from being taken or taken out at the airport for passengers and luggage.

  The difference from the first embodiment is that a mass spectrometer (MS) is used as a trace substance inspection apparatus. MS can detect substances adsorbed on dust and trace substances in the air with high sensitivity in a relatively short inspection time.

  FIG. 5 is a plot of the amount of a trace substance with respect to time when the trace substance test is continuously repeated using MS. In the case of MS, since it is possible to speed up to about 10 seconds even if the specimen SM acquisition time and the examination time are combined, it is possible to output a continuous change in the amount of trace substances in a pseudo manner.

  In this embodiment, a sample SM of a subject SB passing at an arbitrary time is acquired by a gate equipped with a trace substance inspection device that continuously repeats measurement, and information such as a subject ID and an acquisition time of the sample SM is additionally acquired. Security screening is performed by obtaining and evaluating together with the trace substance information of the mixed specimen SM that also has time information.

  Although the measurement of MS is repeated in about 10 seconds, the time interval through which the subject SB passes may be sufficiently shorter than 10 seconds. Therefore, as in the previous embodiment, the test is performed on the mixed sample SM including the samples SM from the plurality of subjects SB in one measurement. Further, in this embodiment, in order to shorten the interval of the continuous measurement, the gas is not purged between the measurements. For this reason, the sample SM is in a condition in which the sample SM can be sufficiently mixed between measurements.

Therefore, trace substances information corresponding to the subject SB which has passed through the gate to the subject SB transit time t in FIG. 5 (1) is pre-determined t-△ T _- Multiple spanning from t-△ T ₊ until the time For the mixed specimen SM, reference is made to the amount obtained by integrating the trace substance information.

  As shown in FIG. 5 (1), in the first gate 210, when a plurality of subjects SB from subject ID7 to ID10 pass through the gate during a time period when a large amount of trace substance is detected, The test result suggests that there is a high possibility that the trace substance is retained for about 4 subjects SB.

  FIG. 5 (2) shows the result of the inspection at the second gate 220 following these subjects SB. As shown in the figure, in the inspection at the second gate 220, consideration should be given so that the subjects SB that have continuously passed through the first gate 210, such as the subjects SB of ID7 to ID10, vary temporally and pass through the gate. Therefore, among the subject SBs of ID7 to ID10, there is a possibility that the subject SB of ID7 who passed the gate in the time zone with a large amount of the trace substance held the substance in both the first and second gates 220. You can find something expensive.

  In addition, as a result of the inspection at the first gate 210, for the subject SB that is determined to be highly necessary for screening, an inspection different from the normal inspection may be performed at the second gate 220.

  For example, the security can be improved by improving the accuracy of final determination by performing a strict inspection with improved accuracy, or by performing a special inspection for detecting explosives.

  Further, for the subject SB determined to have a high necessity for screening as a result of the examination at the first gate 210, for example, the behavior before reaching the first gate 210 is tracked or the first gate 210 is added. Then, security may be improved by monitoring subsequent actions.

  The above-described work can be performed by using, for example, continuous acquisition of tag information, individual tracking in a network using a plurality of video cameras, improvement recognition using facial images and body features, and the like.

  The present invention is not limited to the present embodiment, and various modifications are allowed without departing from the scope of the present invention. For example, the security screening system of the present invention is used for inspection of passengers and baggage dangerous goods and prohibited items in airports, inspection of dangerous and prohibited items in distribution systems, safety of industrial products, quality control, etc. can do.

  Further, in the above embodiment, the sample SM mixed in one from the plurality of groups GR with different combinations of the subjects SB by the plurality of sample extraction units 110 is extracted, and the sample SM extracted by the plurality of sample extraction units 110 is extracted. An example of specifying the subject SB whose security was determined to be impossible in all was exemplified.

  However, the sample extraction unit 110 may individually extract the samples SM again from the subjects SB of the group GR where the security determination result is impossible, and the samples SM may be individually extracted from the subjects SB of the group GR where the security determination result is impossible. You may further have the 2nd extraction part (not shown) which extracts SM again.

  Needless to say, the above-described embodiment and a plurality of modifications can be combined within a range in which the contents do not conflict with each other. Further, in the above-described embodiments and modifications, the structure of each part has been specifically described, but the structure and the like can be changed in various ways within a range that satisfies the present invention.

100 ID Acquisition Unit 110 Sample Extraction Unit 120 Sample Examination Unit 130 Group Determination Unit 140 Result Corresponding Unit 210 First Gate 220 Second Gate 1000 Security Screening System GR Group SB Subject SJ Determination Result SM Sample

Claims (10)

ID acquisition means for individually acquiring a subject ID from each of a large number of subjects;
A sample extracting means for extracting a sample mixed into one for a plurality of groups of a small number of the subjects;
Specimen testing means for testing the specimen extracted by mixing one for each group;
Group determination means for determining the security of the group from the test result of the sample that has been mixed and tested;
A result handling means for associating one determination result of the security with the subject IDs of a plurality of subjects for each group;
Having a security screening system.   The security screening system according to claim 1, further comprising second extraction means for extracting the specimen mixed into one from a plurality of the groups with different combinations of the subjects by the plurality of specimen extraction means.   The security screening system according to claim 2, further comprising: a subject specifying unit that specifies the subject whose security is determined to be impossible in all of the samples extracted by the plurality of sample extracting units. A gate through which the subject passes,
The security screening system according to any one of claims 1 to 3, wherein the sample extraction unit is installed at the gate.   The security screening system according to claim 1, wherein the sample extraction unit re-extracts the sample individually from the subjects in the group for which the security determination result is impossible.   The security screening system according to claim 1, further comprising: a second extraction unit that extracts the specimen again from each of the subjects in the group whose security determination result is impossible.   The security screening system according to claim 2 or 6, wherein the second extraction unit extracts the sample by a method different from the sample extraction unit.   The security screening system according to claim 2, wherein the second extraction unit extracts the specimen that is different from the specimen extraction unit.   The security screening system according to any one of claims 2 and 6 to 8, wherein the second extraction unit extracts the sample with higher accuracy than the sample extraction unit. Obtain individual subject IDs from each of a number of subjects,
Extract a sample mixed into one for each group of a small number of the subjects,
Examining the sample extracted by mixing one for each group,
Determine the security of the group from the test results of the sample that has been mixed and tested,
A security screening method for associating one determination result of the security with the subject IDs of a plurality of subjects for each group.

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