WO2013145470A1 - Inspection device - Google Patents

Description

Inspection device

The present invention relates to an inspection apparatus that collects and analyzes fine particles and vapor.

Recently, the threat of terrorism has been increasing worldwide, and the method of manufacturing explosives using daily necessities has become widely known, and terrorism and crime caused by explosives have become a threat in daily life. In London, a number of terrorist attacks targeting subways and buses resulted in numerous casualties. According to media reports, suspects who attempted suicide bombing on commuter trains were arrested in Japan.

Conventionally, technology development for restricting the introduction of explosives to aircraft or airport facilities has been widely performed. However, in recent years, there is a demand for similar technology development for railway facilities as described above. In order to apply explosive detection technology to a railway station, higher throughput than before is required while maintaining high detection accuracy.

For example, Japanese Laid-Open Patent Publication No. 2000-28579 (Patent Document 1) describes an explosives detection device using a mass spectrometer as a conventionally developed dangerous substance detection technique. This apparatus collects explosive vapor leaked from a load with a sampling probe, ionizes it using a negative corona discharge, and detects it using a mass spectrometer, thereby determining the presence or absence of a dangerous substance. In JP-A-7-6729 (Patent Document 2), explosive particles are collected with a cyclone on a disk-shaped or tape-shaped filter, moved to another position, and the collected explosive particles are heated and evaporated. A method of analyzing with an ion mobility analyzer is disclosed. Japanese Patent Laid-Open No. 3-87629 (Patent Document 3) describes a portal-type explosive detection device. According to this technology, the subject is placed in a booth-like room with walls on the top, bottom, left and right, and air is blown from the left and right to cause the explosive particles adhering to the subject to rise. Furthermore, explosive particles are sucked from a suction port on the ceiling with a large-capacity suction pump and adsorbed by a filter provided on the rotating body. The rotating body is rotated to move the filter to the analysis unit, and the adsorbed explosive fine particles are evaporated by heating and analyzed by an ion mobility analyzer. In addition, US 2006/0049346 A1 (Patent Document 4) describes a walk-through type explosive detection device. In this apparatus, air jets are jetted onto a passenger passing through a passage, whereby fine particles are peeled off from clothes and the like and analyzed by an ion trap mobility analyzer.

JP 2000-28579 A Japanese Patent Laid-Open No. 7-6729 Japanese Patent Laid-Open No. 3-87629 US 2006/0049346 A1

The conventional techniques as described above have the following problems.

The technique described in Patent Document 1 requires that the explosive vapor leaked from the cargo be collected by a sampling probe. Destructive military explosives and explosives, industrial explosives used at construction sites, etc., use stable materials for safe operation, so there are many materials with relatively low vapor pressure. Therefore, it is necessary to collect and analyze as fine particles rather than collecting steam. The techniques described in Patent Documents 2 and 3 require adsorption and heating processes and cannot perform continuous real-time analysis. Furthermore, in the case of the technique described in Patent Document 3, since the suction is sucked from a suction port by a large-capacity suction pump, not only explosive fine particles but also dust etc. are sucked together, resulting in clogging of the filter and long-term operation. Is difficult. Furthermore, there is a problem that the vapor generated from the explosive fine particles is diluted by a large volume of suction.

Also, a conventional explosive detection device such as Patent Document 3 is considered for the purpose of inspecting a relatively small number of people mainly on the premise of operation at an airport or an important facility. When used in a mass transit system that is used in large quantities by passengers such as railway stations, it is possible to reduce the false alarm rate that a detector reacts even if it does not have explosives, and high throughput that can be inspected in a short time. Two are important. In particular, when a false alarm occurs, careful baggage inspection by an inspector is required, which affects the throughput. Therefore, when a false alarm occurs, quick inspection is difficult. Similarly, the conventional explosive detection device such as Patent Document 4 is configured to collect fine particles that settle in the entire space through which a passenger passes, and thus it is difficult to achieve high throughput.

For the above reasons, there is a demand for a detection technique that can be installed at a railway station or the like and has both high throughput and high detection accuracy.

An inspection apparatus according to the present invention is an apparatus for detecting a detection target substance caused by a subject, and includes an alignment unit that allows the subject to be aligned and a first portion set in a subject passage region of the alignment unit. Intake from an air supply section for supplying air to the space, a first intake section for intake from the first space, and a second space smaller than the first space set at a position different from the first space Detecting a detection target substance in the air sucked from the second suction part, a first detection part for detecting a detection target substance in the air sucked from the first suction part, and a second suction part A second detection unit; and a determination unit configured to determine whether the detection target substance has been detected in cooperation with the detection result of the first detection unit and the detection result of the second detection unit. The first detection unit and the second detection unit are combined with each other with different time required for detection of the detection target substance.

Typically, the first inhalation part inhales the whole body of the subject, and the second inhalation part inhales the subject's hand.

According to the present invention, an explosives detection device having both high throughput and high detection accuracy can be realized.

Issues, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

The plane schematic diagram which shows the structural example of the analyzer by this invention. The cross-sectional schematic diagram which shows the structural example of the analyzer by this invention. The cross-sectional schematic diagram which shows the structural example of the analyzer by this invention. Explanatory drawing which shows two types of signal strength of the analyzer by this invention. The figure which shows the determination concept using the signal strength waveform by a whole body inhalation type. The figure which shows the determination concept using the feature-value waveform which integrated the signal by a whole body inhalation type | formula. The figure which shows the determination concept using the signal strength waveform by a local inhalation type. The figure which shows the determination concept using the feature-value waveform which differentiated the signal by a hand suction type. The figure which shows the example of the determination flow by a determination part. The figure which shows the example of the determination criterion of a user interface. The figure which shows the example of a user interface screen. The figure which shows the determination concept using the signal intensity | strength waveform by a whole body inhalation type | formula, and the feature-value waveform derived | led-out from it. The figure which shows the determination concept using the signal intensity | strength waveform by a local inhalation type | formula, and the feature-value waveform derived | led-out from it. The figure which shows the example of the determination flow by a determination part. The figure which shows the example of the determination criterion of a user interface. The figure which shows the example of a user interface screen. The plane schematic diagram which shows the structural example of the analyzer by this invention. The cross-sectional schematic diagram which shows the structural example of the analyzer by this invention. The cross-sectional schematic diagram which shows the structural example of the analyzer by this invention. The figure which shows the internal structural example of two types of detection parts. The schematic diagram which shows the structural example of the analyzer by this invention. The schematic diagram which shows the structural example of the analyzer by this invention. The schematic diagram which shows the structural example of the analyzer by this invention. Explanatory drawing which shows a criterion. The schematic diagram which shows the structural example of the analyzer by this invention. The schematic diagram which shows the internal structure of a detection part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(A) First Embodiment FIGS. 1 to 3 are schematic views showing a first embodiment of the analyzer according to the present invention, FIG. 1 is a schematic plan view, and FIG. 2 is along the moving direction of the detection target. FIG. 3 is a schematic sectional view, and FIG. 3 is a schematic sectional view perpendicular to the moving direction of the detection target.

In FIG. 1, 10 is a detection target (subject) such as a passenger, 11 is an object alignment unit such as a ticket gate, 12 is an air supply unit, 13 is a first intake unit, 14 is a second intake unit, 21 Is a first explosive detection unit, 22 is a second explosive detection unit, 23 is a determination unit, and 24 is a display unit.

The operation of the first embodiment of the present invention will be described below. The detection target 10 is forced to form a line by the target alignment unit 11 and sequentially passes through the space between the air supply unit 12 and the first intake unit 13. This space is defined as a first collection target range A. When the detection target 10 enters the first collection target range A, the air flow sent out from the air supply unit 12 carries explosives adhering to the detection target 10 or evaporating from the detection target 10 or its traces, The first air intake unit 13 sucks and collects the air. The collected substance is sent to the first detector 21 and subjected to necessary analysis. The air flow sent from the air supply unit 12 may be a continuous air flow or an intermittent air flow.

Next, the detection target 10 passes through the space in the vicinity of the second air intake unit 14 in order, in a state where the detection target 10 remains in a line. This space is a second collection target range B. The second collection target range B is a space smaller than the first collection target range A. When the detection target 10 enters the second recovery target range B, the explosive material adhering to the detection target 10 or evaporating from the detection target 10 or its trace is inhaled and recovered by the second intake section 14. The collected substance is sent to the second detection unit 22 and subjected to necessary analysis.

Based on the signals output from the first detection unit 21 and the second detection unit 22, the determination unit 23 determines whether an explosive is detected, and the result is displayed to the user through the display unit 24. Notice.

Here, using FIG. 4, the difference between the signal intensity of the explosive detection signal detected by the first detection unit 21 and the signal intensity of the explosive detection signal detected by the second detection unit 22. The features will be described.

FIG. 4 illustrates an example of signal strength in the first embodiment of the present invention, and shows two types of signal strength. The graph showing the signal intensity in FIG. 4 shows (1) the whole body inhalation type, that is, the detection signal from the substance collected from the space constituted by the air supply unit 12 and the first intake unit 13 on the time axis. And (2) a hand-intake type, that is, a detection signal from a substance collected from the second intake part 14 on the time axis. Here, it is assumed that the inhalation at hand is intended to inhale with the hand or finger of a passing pedestrian as the detection target 10 or an object held by the detection target 10, such as a ticket.

As shown in FIG. 4, the signal intensity of the whole body inhalation type has a more gradual signal rise and a slower signal fall than the signal intensity of the local inhalation type. This is due to the inevitable difference that the whole body inhalation type needs to perform air supply and inspiration for a large space as compared with the local inhalation type, so that it takes time to process the space itself. Specifically, the signal by the hand-inhalation type obtains a signal peak in about 1 second after passing through the detection target 10, whereas the signal by the whole-body inspiration type obtains a signal peak in about 2 seconds. The whole body inhalation type signal has a gentle slope up to the peak and a slope up to the extinction of the signal after the peak, and has a length of about 3 seconds or more until the signal disappears after the signal rises up. On the other hand, the signal by the hand-intake type has a steep slope, and it takes about 1 second until the signal disappears after the signal rises.

High throughput and high detection accuracy can be realized by appropriately using these two types of signals.

Next, FIGS. 5 to 8 illustrate examples of signal strength in the first embodiment of the present invention, and show the determination concept using two types of signal strength of the analyzer according to the present invention.

As described above, the signal intensity by the whole body inhalation type shows a gentle shape in the time axis direction as shown in FIG. This is because the detection target substance is easily diffused because the space to be detected is large. On the other hand, the signal intensity by the hand-intake type has a steep shape in the time axis direction as shown in FIG. This is because the space to be detected is small and the diffusion of the detection target substance is small.

Based on the two types of signal intensity waveforms having such characteristics, the determination unit 23 determines whether there is a detection target substance, in other words, whether an explosive is detected. At this time, there is a method of extracting the feature quantity of each waveform in order to effectively use the characteristics of the two types of signal waveforms. Here, as an example, a method of extracting a feature amount by performing integration processing on a signal intensity waveform by the whole body inhalation type and differentiating processing on a signal intensity waveform by the local inspiration type will be described as an example.

FIG. 5 shows a relatively simple discrimination method. For the signal intensity waveform by the whole body inhalation method, two threshold values used for signal intensity determination are provided, and when the signal intensity exceeds the high threshold A1, the high level H, the high threshold A1 does not exceed, but exceeds the low threshold A2. The case is a medium level M, and the case where the low threshold A2 is not exceeded is a low level L.

FIG. 6 shows a case where two threshold values used for determination are provided for the feature amount waveform obtained by integrating the signal intensity of the whole body inhalation type. The state where the feature amount obtained by time-integrating the signal intensity exceeds the high threshold value B1 is high level H, the high threshold value B1 is not exceeded but the low threshold value B2 is exceeded, the intermediate level M, and the feature amount is low The case where the threshold value B2 is not exceeded is set to the low level L.

Similarly, FIG. 7 shows a method of discriminating based on a signal intensity waveform by a hand-intake type. For the signal intensity waveform by the hand-inhalation method, two threshold values used for signal intensity determination are provided. When the high threshold value C1 is exceeded, the high level H, while the high threshold value C1 is not exceeded but the low threshold value C2 is exceeded When the position level M does not exceed the low threshold C2, the low level L is set.

FIG. 8 shows a case where two threshold values used for determination are provided for the feature amount waveform obtained by differentiating the signal intensity by the local inhalation type. The state where the characteristic amount obtained by time differentiation of the signal intensity exceeds the high threshold D1 is the high level H, the case where the high threshold D1 is not exceeded but the low threshold D2 is exceeded, the intermediate level M, and the feature amount is low The case where the threshold value D2 is not exceeded is set to the low level L.

Next, the operation of the determination unit 23 will be described with reference to FIG. FIG. 9 illustrates the operation of the determination unit 23 when the determination criteria of FIGS. 5 to 8 are used, and an example of a determination flow using two types of signal strengths and two types of feature amounts of the analyzer. Show. In the first embodiment, it is assumed that the whole body intake by the first intake unit 13 is performed before the local intake by the second intake unit 14.

As shown in FIG. 9, first, a detection process using signal intensity due to whole body inspiration is performed (S11), and the determination unit determines whether or not this exceeds a threshold value A1 (S12). If the signal intensity exceeds the threshold A1 and is determined to be a high level H, it is determined that an explosive has been detected. If the signal intensity does not exceed the threshold A1, integration processing using the signal intensity by whole body inspiration is performed (S13), and it is determined whether or not the obtained feature amount exceeds the threshold B1 (S14). When the integral feature amount exceeds the threshold B1 and is determined to be a high level H, it is determined that an explosive is detected.

If the integral feature quantity does not exceed the threshold value B1, detection processing using the signal intensity by hand inspiration is performed (S15), and the determination unit determines whether this exceeds the threshold value C1 (S16). When the signal intensity exceeds the threshold C1 and is determined to be a high level H, it is determined that an explosive is detected. If the signal intensity does not exceed the threshold value C1, differential processing using the signal intensity by hand inspiration is performed (S17), and it is determined whether or not the obtained feature value exceeds the threshold value D1 (S18). When the differential feature amount exceeds the threshold value D1 and is determined to be a high level H, it is determined that an explosive is detected.

If the differential feature quantity does not exceed the threshold value D1, the signal intensity by whole body inhalation, the signal intensity by local inspiration, and the number of times that the feature quantity is determined to be the middle level M are examined (S19). If the number of times that the medium level is determined is two or more, it is determined that an explosive is detected. If it is not determined to be the middle level at all and all the determinations are at the low level L, it is determined that the explosive is not detected. On the other hand, when the number of times determined to be the middle level M is one, neither explosive detection nor non-detection can be determined, so it is determined that attention is required.

Next, operations of the determination unit 23 and the display unit 24 will be described with reference to FIGS. 10 and 11. FIG. 10 explains the operation of the determination unit 23 according to the flow of FIG. 9, and shows an example of determination criteria in the user interface of the analyzer.

In the first embodiment, as described above, the four types of information, that is, the signal intensity acquired from the whole body inspiration, the feature amount extracted therefrom, the signal intensity acquired from the local inspiration, and the feature amount extracted therefrom are obtained. Judgment is made based on this. FIG. 10 shows the criteria for this determination in the form of a list. For example, the functions constituting the user interface can be implemented based on this list. If any one of the four types of information indicates a high level H, X determination, that is, explosive detection detection determination is performed regardless of what other information is. None of the four types of information is at the high level H, but when the intermediate level M is included, Δ determination or x determination is performed depending on conditions. In this example, the high level H is not included in the four types of information, but x determination, that is, explosive detection detection determination is performed when two or more types indicate the middle level M. Further, although all of the four types of information are not at the high level H, when one type is at the middle level M, a Δ determination, that is, a caution determination is performed. If none of the four types of information is the high level H and the medium level M, the determination of ◯, that is, the explosive non-detection determination is performed.

FIG. 11 illustrates the operation of the display unit 24, and shows an example of the user interface screen of the analyzer according to the present embodiment. As shown in FIG. 11, every time the detection target 10 passes the target alignment unit 11, the display unit 24 assigns an identification ID to each detection target 10, records the passage time, and displays this in the form of a list. . The list displays the information, the signal intensity and the feature level corresponding to each detection target. Then, the determination result of the determination unit 23 is displayed together. By adopting such a list, the user who should monitor the display unit 24 can easily recognize the change in the state of the time axis.

In this example, the threshold value is set to 2 for each of the four types of information: the signal intensity acquired from the whole body inspiration, the feature amount extracted therefrom, the signal intensity acquired from the local inspiration, and the feature amount extracted therefrom. Although it is determined by setting the stage, each threshold value may be one. In this case, it is determined whether the level is high or low, and there is no determination of the middle level M. The determination flow at this time is obtained by removing step 19 from FIG. Further, only the left half not including the intermediate level M is used as the determination criterion shown in FIG.

Next, there are 4 types of signal intensity waveform by whole body inhalation type, feature amount extracted by applying integration processing to it, signal intensity waveform by hand inhalation type, and feature amount extracted by applying differential processing to it Another example of the discrimination method using the above information will be described.

FIG. 12 shows a case where one threshold value used for determination is provided for the signal intensity waveform by the whole body inhalation type, and one threshold value used for determination is provided for the feature amount waveform obtained by integrating the signal intensity. Based on the signal intensity waveform and the feature amount waveform, the three levels of high level H, middle level M, and low level L are discriminated. The high level H is a state in which the signal intensity exceeds the threshold value and the feature amount also exceeds the threshold value. The middle level M is a state in which the signal intensity does not exceed the threshold but the feature amount exceeds the threshold. The low level L is a state in which the signal intensity does not exceed the threshold value and the feature amount is also below the threshold value.

Similarly, FIG. 13 shows a case where one threshold value used for determination is provided for the signal intensity waveform by the hand-intake type, and one threshold value used for determination is provided for the feature amount waveform obtained by differentiating the signal intensity. Yes. Also in this case, the determination is made in three stages of high level H, middle level M, and low level L based on the signal intensity waveform and the feature amount waveform. The high level H is a state in which the signal intensity exceeds the threshold value and the feature amount also exceeds the threshold value. The middle level M is a state in which the signal intensity does not exceed the threshold but the feature amount exceeds the threshold. The low level L is a state in which the signal intensity does not exceed the threshold value and the feature amount is also below the threshold value.

FIG. 14 illustrates the operation of the determination unit 23 when the determination criteria of FIGS. 12 and 13 are used, and an example of a determination flow using two types of signal strengths and two types of feature amounts of the analyzer. Is shown.

As shown in FIG. 14, first, detection processing using the signal intensity due to whole body inspiration is performed (S21), and further detection processing using a feature amount obtained by time-integrating the signal intensity due to whole body inspiration is performed (S22). Next, level determination is performed based on the determination criterion of FIG. 12 depending on whether the signal intensity detected in step 21 exceeds a threshold value or whether the feature amount detected in step 22 exceeds a threshold value (S23). ). If both the signal intensity and the feature amount exceed the threshold and are determined to be a high level H, it is determined that an explosive has been detected.

If the determination result in step 23 is the middle level M or the low level L, detection processing using the signal strength by hand inspiration is performed (S24), and the feature amount obtained by time-differentiating the signal strength by hand inspiration is obtained. The detection process used is performed (S25). Next, level determination is performed based on the determination criterion of FIG. 13 depending on whether the signal intensity detected in step 24 exceeds a threshold value or whether the feature value detected in step 25 exceeds a threshold value (S26). ). If the signal intensity and the feature amount exceed the threshold and are determined to be a high level H, it is determined that an explosive is detected.

If the determination result in step 26 is the intermediate level M or the low level L, the process proceeds to step 27, and the number of times determined as the intermediate level M is checked. If the result is 2, that is, if the determination at step 23 or the determination at step 26 is determined to be the middle level M, it is determined that the explosive is detected. If the medium level M is not determined at all and all the determinations are the low level L, it is determined that the explosive is not detected. Further, when the number of times determined to be the intermediate level M is 1, that is, when the intermediate level M is determined by either the determination of step 23 or the determination of step 26, both explosive detection and non-detection are determined. Since it is not possible, it is determined that attention is required.

FIG. 15 is a list of determination results obtained by the determination methods shown in FIGS. 12 and 13. Judgment levels H, M, and L using signal intensity from whole body inspiration and feature values obtained by time integration processing, and judgment levels H and M using signal intensity from hand inspiration and feature values obtained by time differentiation , L to perform explosive detection detection. If any of the determination levels is high level H, it is determined that an explosive is detected, and if both determinations are low level L, it is determined that no explosive is detected. If one of the determinations is at the medium level M and the other determination is at a low level, neither explosive detection nor non-detection can be determined.

FIG. 16 shows an example of a user interface screen at this time. Whenever the detection target 10 passes through the target alignment unit 11, the display unit 24 assigns an identification ID to each detection target 10, records the passage time, and displays this in the form of a list. In the list, the information, the level determined from the signal intensity and the feature amount are displayed in correspondence with each detection target. Then, the determination result of the determination unit 23 is displayed together.

(B) Second Embodiment FIGS. 17 to 19 show a second embodiment of the present invention, and show an example of the configuration and dimensional constraints of the analyzer. FIG. 17 is a schematic plan view, FIG. 18 is a schematic cross-sectional view along the moving direction of the detection target, and FIG. 19 is a schematic cross-sectional view perpendicular to the moving direction of the detection target.

In FIG. 17, 10 is a detection target for passengers, 11 is an object alignment unit such as a ticket gate, 12 is an air supply unit, 13 is a first intake unit (whole body intake unit), and 14 is a second intake unit (on hand). (Intake unit), 21 is a first explosive detection unit, 22 is a second explosive detection unit, 23 is a determination unit, and 24 is a display unit.

FIG. 20 shows the internal structure of the first detector 21 and the second detector 22 in the second embodiment of the present invention. Here, in the second embodiment of the present invention, description will be made assuming that the first detection unit 21 performs detection by gas and the second detection unit 22 performs detection by solid.

In FIG. 20, 211 is a detection object introduction port of the first detection unit 21, 212 is a substance analysis unit of the first detection unit 21, 221 is a detection object introduction port of the second detection unit 22, and 222 is a first The solid object sizing part of the second detection part 22, 223 is a solid object heating vaporization part of the second detection part 22, and 224 is a substance analysis part of the second detection part 22.

Since the operation of the second embodiment of the present invention is the same as that of the first embodiment, detailed description thereof is omitted.

Hereinafter, with regard to the second embodiment of the present invention, the dimensional constraints of the apparatus will be described with reference to FIGS. 17 to 19 and FIG.

As shown in FIG. 19, ½ length of the passage width formed by the target alignment unit 11 is L [m]. Similarly, the distance between the first intake section 13 and the second intake section 14 is d [m], the flow velocity of the gas blown from the air supply section 12 is v [m / s], and the moving speed of the detection target 10 Is v0 [m / s]. The distance between the trunk of the detection target 10 and the hand is d0 [m]. Further, the difference between the detection time by the first detection unit 21 and the detection time by the second detection unit 22 is represented by Δt [s].

Under such conditions, in order to reduce the timing shift between the detection by the first detection unit 21 and the detection by the second detection unit 22, these parameters must satisfy the following equations.

(L / v) −Δt = ((d−d0) / v0)
More specific values are shown below. L is in the range of 0.5 to 0.7 because of restrictions on the passage width and device installation area. v0 is in the range of 1.1 to 1.7 due to restrictions on the travel speed of passengers. v is in the range of 4 to 8 for the purpose of appropriately carrying gas in the assumed passage width. Δt is zero as long as the first detector and the second detector detect the target substance using the same method, but Δt is zero if the target substance is detected using a different method. Has a value other than.

As shown in FIG. 20, the first detection unit 21 and the second detection unit 22 are different in the number of steps of internal processing. Furthermore, the heating and vaporizing unit 223 included in the second detection unit 22 is a processing unit that heats and vaporizes a solid target substance, and requires a certain time to heat the target to the boiling point.

Here, Δt is about 1 from an actual measurement value when a practical detector is used.

If these parameters are substituted into the above equation, (d−d0) becomes −1.0 to −0.5. Since d0 is usually about 0.4, d is in the range of −0.6 to −0.1. In other words, the first intake section 13 needs to be installed ahead of the second intake section 14 in the movement direction of the detection target.

FIG. 21 shows a configuration example in which the first intake unit 13 and the second intake unit 14 are arranged such that the detection target 10 passes through the second intake unit 14 and then passes through the first intake unit 13. Show. The first intake part 13 is installed in front of the second intake part 14 in the movement direction of the detection target 10. By setting it as such a structure, the signal output from the 1st detection part 21 and the signal output from the 2nd detection part 22 are output at a comparable timing with respect to a specific detection target. It will be.

FIG. 22 shows another configuration example developed from this concept. FIG. 22 shows a second embodiment of the present invention, and shows an example of the third configuration of the analyzer and dimensional constraints. In this configuration example, the gate portion 15 is provided near the exit of the target alignment portion 11. Based on signals output from the first detection unit 21 and the second detection unit 22, the determination unit 23 controls the opening and closing of the gate unit 15. In order to control the gate unit 15 at an appropriate timing, the signal output from the first detection unit 21 and the signal output from the second detection unit 22 are comparable to a specific detection target. It is desirable to output at timing. This is because if the timing difference is large, it is necessary to extend the length of the target alignment portion 11 by the timing difference in order to stop the detection target 10 by closing the gate portion 15.

FIG. 23 shows another configuration example. FIG. 23 shows a second embodiment of the present invention, and shows an example of the fourth configuration and dimensional constraints of the analyzer. In this configuration example, a second air supply unit 16 and a third intake unit (whole body intake unit) 17 are provided in the vicinity immediately before the gate unit 15. Furthermore, a third detection unit 25 for analyzing the substance collected by the third intake unit 17 is provided.

When the determination unit 23 determines that the detection target substance is detected from the signal output from the first detection unit 21 and the signal output from the second detection unit 22, the gate unit 15 is controlled to detect the detection target. Decrease the movement speed by 10. In this state, the air flow sent out from the second air supply unit 16 carries explosives adhering to the detection target 10 or evaporating from the detection target 10 or its traces, and this is conveyed by the third air intake unit 17. Recover. The collected substance is sent to the third detection unit 25 and subjected to necessary analysis. Here, since the moving speed of the detection target 10 can be expected to be sufficiently low, an analysis with higher accuracy than the analysis performed in the first detection unit 21 and the second detection unit 22 can be attempted. It is possible to detect explosives with high accuracy.

FIG. 24 shows an example of the gate unit operation and the explosive detection detection method when the signal intensity detected by each detection unit is one of a low level, a medium level, and a high level. In FIG. 24, the first intake section 13 is represented as the whole body intake section 1, the second intake section 14 as the hand intake section, and the third intake section 17 as the whole body intake section 2.

For example, when the signal level of the whole body inhalation part 1 or the hand inhalation part is the middle level M, the gate part is temporarily “closed”, the signal level is obtained again by the whole body inhalation part 2, and the result is an explosion. Make an object detection decision. Also, for example, if either the whole body intake part 1 or the signal level of the hand intake part is a high level H, the explosive detection detection has already been confirmed, so the gate part remains “open” The detection target may be controlled so as not to realize that such a determination has been made.

(C) Third Embodiment FIG. 25 shows a third embodiment of the present invention, and shows an example of the configuration and dimensional constraints of the analyzer according to the present invention.

Referring to the third embodiment of the present invention, the main operations, configurations, and dimensional constraint concepts are the same as those in the second embodiment, and detailed description thereof will be omitted. Hereinafter, the difference from the second embodiment will be mainly described.

In the second embodiment, the signals output from the first detection unit 21 and the second detection unit 22 are configured to be output at the same timing with respect to a specific detection target. However, depending on the convenience of the device configuration, it may be required to provide only a single detection unit and detect each target substance introduced from a plurality of intake units. Specifically, the detection unit may be expensive or large and it may not be practical to install a plurality of detection units. A third embodiment as a configuration example corresponding to such restrictions will be described with reference to FIG.

In FIG. 25, 10 is an object to be detected such as a passenger, 11 is an object alignment unit such as a ticket gate, 12 is an air supply unit, 13 is a first intake unit (whole body intake unit), and 14 is a second intake unit (on hand). (Intake unit), 21 is an explosive detection unit, 23 is a determination unit, and 24 is a display unit.

FIG. 26 shows the internal structure of the detection unit 21. 210 is a detection target introduction port by solid of the detection unit 21, 211 is a detection target introduction port by gas of the detection unit 21, 212 is a solid target sizing unit of the detection unit 21, 213 is a solid target of the detection unit 21 A heating vaporization unit 214 is a substance analysis unit of the detection unit 21.

In the third embodiment, it is assumed that the detection target 10 enters the target alignment unit 11 with a certain frequency or less due to some other restriction. Here, it is assumed that a throughput of 1200 times / hour, that is, entry every 3 seconds.

Since a single detection unit is used for a plurality of intake units, detection accuracy can be improved by appropriately shifting the timing of introduction of the target substance into the detection unit. Since it is approaching every 3 seconds, if the timing of shifting is 1.5 seconds, the above formula (L / v) −Δt = ((d−d0) / v0)
Δt is not (1) assumed in the second embodiment but (1-1.5). When the equation is developed under this condition, (d−d0) becomes 0.53 to 0.34. Since d0 is usually about 0.4, d is in the range of 0.93 to 0.74. Therefore, the first intake section 13 that performs whole body intake needs to be installed 0.7 to 1.0 on the front side in the traveling direction of the detection target 10 relative to the second intake section 14 that performs local intake.

In this specification, the details of the sizing part, the heating and vaporizing part, the substance analyzing part, etc. are not described, but it is assumed that these individual functions are realized by existing technologies. For example, a mass analyzer or an ion mobility detector can be used as the substance analysis unit.

Further, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 10 Detection target 11 Target alignment part 12 Air supply part 13 1st air intake part 14 2nd air intake part 15 Gate part 16 2nd air supply part 17 3rd air intake part 21 1st detection part 22 2nd detection Unit 23 determination unit 24 display unit 25 third detection unit 211 first detection unit introduction port 212 first detection unit substance analysis unit 221 second detection unit introduction port 222 second detection unit sizing Unit 223 Heating and vaporizing unit 224 of the second detection unit Material analysis unit of the second detection unit

Claims (13)

An inspection apparatus for detecting a detection target substance caused by a subject,
An alignment section for aligning and passing the subject;
An air supply unit for supplying air to the first space set in the subject passage region of the alignment unit;
A first air intake section for taking in air from the first space;
A second air intake section for taking in air from a second space smaller than the first space set at a position different from the first space;
A first detection unit for detecting the detection target substance in the air sucked from the first intake unit;
A second detection unit for detecting the detection target substance in the air sucked from the second intake unit;
A determination unit that determines whether the detection target substance is detected in cooperation with the detection result of the first detection unit and the detection result of the second detection unit;
The inspection apparatus, wherein the first detection unit and the second detection unit are different in time required for detection of the detection target substance. The inspection apparatus according to claim 1,
2. The inspection apparatus according to claim 1, wherein the first inhalation part inhales the whole body of the subject and the second inhalation part inhales at the subject's hand. 2. The inspection apparatus according to claim 1, wherein the second detection unit includes a processing unit that heats and vaporizes fine particles in the air sucked from the second intake unit. The inspection apparatus according to claim 1,
The determination unit is an intensity level of a first detection signal by the first detection unit, a level of a signal obtained by time integration of the first signal, an intensity level of a second detection signal by the second detection unit, An inspection apparatus that determines whether or not the detection target substance has been detected based on a combination of a signal level obtained by time-differentiating the second signal. The inspection apparatus according to claim 4, wherein
The determination unit is an intensity level of a first detection signal by the first detection unit, a level of a signal obtained by time integration of the first signal, an intensity level of a second detection signal by the second detection unit, An inspection apparatus that determines that the detection target substance has been detected when any of the levels of a signal obtained by time differentiation of the second signal exceeds a predetermined threshold. The inspection apparatus according to claim 4, wherein
The determination device outputs a signal indicating whether the detection object is detected, not detected, or not determined either. The inspection apparatus according to claim 1,
A test apparatus that passes through the alignment unit first passes through the second intake unit and then passes through the first intake unit. The inspection apparatus according to claim 7, wherein
The inspection apparatus according to claim 1, wherein a distance between the first intake portion and the second intake portion is 0.1 to 0.6 meters. The inspection apparatus according to claim 1,
The aligning portion is an openable / closable gate provided in the vicinity of the outlet, a second air supply portion for supplying air to a third space set immediately before the gate, and intake air from the third space. An inspection apparatus, further comprising: a third intake unit; and a third detection unit that detects the detection target substance in the air sucked from the third intake unit. The inspection apparatus according to claim 9, wherein
The determination unit determines whether or not the detection target substance has been detected in cooperation with the inspection result by the first detection unit and the inspection result by the second detection unit. An inspection apparatus characterized in that when it is determined that it has been detected and / or when it has not been detected whether it has been detected or not, the gate is closed and detection by the third detection unit is performed. The inspection apparatus according to claim 1,
The inspection apparatus, wherein the first detection unit also serves as the second detection unit, and includes a processing unit that heats and vaporizes particulates in the air sucked from the second intake unit. The inspection apparatus according to claim 11, wherein
An inspection apparatus, wherein a subject passing through the alignment section first passes through the first intake section and then passes through the second intake section. The inspection apparatus according to claim 12, wherein
The inspection apparatus according to claim 1, wherein a distance between the first air intake portion and the second air intake portion is 0.7 to 1.0 meter.

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