WO2022118412A1

WO2022118412A1 - Analysis device, analysis system, and analysis method

Info

Publication number: WO2022118412A1
Application number: PCT/JP2020/044917
Authority: WO
Inventors: 安章高田; 昌和菅谷; 秀夫鹿島; 峻熊野; 司師子鹿; 信二吉岡
Original assignee: 株式会社日立ハイテク
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2022-06-09
Also published as: JPWO2022118412A1

Abstract

The present invention is characterized by comprising: a transport unit (202) that transports a bag (B) that is an inspection target that efficiently collects fine particles from the inspection target; a nozzle that injects compressed air for separating the fine particles attached to the bag (B); a collection unit (130) that collects the fine particles separated from the bag (B) by the compressed air injected from the nozzle; and an analysis unit (150) that analyzes the fine particles collected by the collection unit (130), wherein the compressed air is continuously or intermittently injected from the nozzle before the bag (B) reaches the nozzle, and a state in which the compressed air is injected by the nozzle continues until at least the bag (B) passes through the front side of the nozzle.

Description

Analytical equipment, analytical system and analytical method

The present invention relates to an analyzer, an analysis system, and an analysis method for recovering and analyzing fine particles from an inspection object.

The threat of terrorism is increasing worldwide. In particular, explosives are increasingly used in recent terrorism because the method of manufacturing powerful explosives made from daily necessities has spread via the Internet. One of the effective means to prevent explosive terrorism is to find explosives hidden by explosives detectors. There are two known methods for detecting explosives: bulk detection, which finds a mass of explosives, and trace detection, which finds traces of a small amount of explosives.

Bulk detection, as typified by an X-ray inspection device, acquires an image of the inside of a bag or the like and discriminates a suspicious object from its shape or size. On the other hand, trace detection analyzes a chemical substance adhering to an inspection target by a chemical analysis means and identifies the component thereof. As a result, for example, if the explosive is detected from the surface of the bag, it is determined that the explosive may be concealed inside the bag. Since the information obtained by bulk detection and trace detection is different, it is known that security can be improved by using both detection methods together.

Patent Document 1 provides an inspection device including "a gas sampling device and a sensor for detecting a chemical substance contained in a gas sampled by the gas sampling device. The gas sampling device forms an air curtain and forms an air curtain. An air supply unit that covers the area containing the object to be inspected and forms a space isolated from the outside world, a sampling unit that collects gas in the isolated space, and a sampling unit that collects the gas in the isolated space. It has a diffusing gas supply unit that supplies at least an equal amount of gas for diffusion, and the sampling unit includes multiple sampling nozzles located at three different locations within an isolated space. "Gas sampling. Equipment and inspection equipment are disclosed (see summary).

Patent Document 2 states, "In order to realize space saving and cost reduction in a device for inspecting a substance, the fine particle inspection device includes a plurality of collection ports for collecting the substance to be inspected. A pair of fine particles connected to each collection port to concentrate the fine particles collected at this collection port, and a fine particle connected to each centrifugal separation device and concentrated from each of the centrifugal separation devices. The substance inspection device, the substance inspection system, and the substance inspection method are disclosed (see summary).

International Publication No. 2013/035306 International Publication No. 2015/145546

In trace detection, fine particles adhering to inspection targets such as bags are peeled off and collected by airflow, and the presence or absence of traces of explosives is clarified by analyzing the fine particles. In such trace detection, when the size of the inspection target is large, improvement for recovering fine particles from the target location is desired.

First, the conventional technique will be described with reference to FIG.
FIG. 11 is a diagram showing a conventional nozzle 111 for injecting compressed air W and an intake port 131 for collecting fine particles.
As shown in FIG. 11, the intake port 131 is arranged at a position facing the nozzle 111 so that the fine particles blown off by the compressed air W ejected from the nozzle 111 can be collected. Such a configuration is also shown in FIG. 10 of Patent Document 2. When the inspection target is bag B, traces of explosives are likely to remain in a part that is easily touched by hand, specifically, in the vicinity of handle B1. Therefore, in general, as shown in FIG. 11, the bag B is set so that the portion of the handle B1 comes between the nozzle 111 and the intake port 131. Alternatively, when the bag B is conveyed by a conveying portion such as a belt conveyor, compressed air W is injected from the nozzle 111 at the timing when the handle B1 passes between the nozzle 111 and the intake port 131.

However, there are various types of bag B, and the handle B1 is not always placed in the center of bag B. Also, in order to increase the inspection throughput, it is often the case that the transport speed of the belt conveyor is set high. In such a case, it is difficult to accurately aim at the position of the handle B1 of the bag B moving at high speed and apply the compressed air W.

Further, in order to collect the fine particles taken in from the intake port 131, a cyclone type fine particle dust collector (cyclone type dust collector) is often provided. In this case, the flow rate that can be sucked from the intake port 131 is limited. This is because if the flow rate of the cyclone type dust collector is excessively increased, problems such as re-scattering of the collected fine particles occur. As a method of increasing the flow rate that can be sucked by the cyclone type dust collector, there is a method such as increasing the size of the cyclone type dust collector. However, the increase in size of the cyclone type dust collector leads to the increase in size of the trace inspection device itself. The size of the cyclone type dust collector also affects the particle size of the fine particles that can be collected. Therefore, it is difficult to increase the size of the cyclone type dust collector.

Since it is difficult to increase the size of the cyclone type dust collector, the flow rate that can be sucked from the intake port 131 is limited. Therefore, at the moment when the compressed air W is injected from the nozzle 111, the flow rate of the compressed air W exceeds the flow rate that can be sucked from the intake port 131. It may end up. In such a case, only a part of the fine particles blown off from the handle B1 can be recovered from the intake port 131. Therefore, there is also a problem that the recovery efficiency of fine particles is deteriorated.

The present invention was made in view of such a background, and an object of the present invention is to efficiently recover fine particles from an inspection target.

In order to solve the above-mentioned problems, the present invention has a transport unit for transporting an inspection object, a nozzle for injecting compressed air for peeling off a substance adhering to the inspection object, and a nozzle ejected from the nozzle. It has a recovery unit that collects fine particles separated from the inspection target by the compressed air, and an analysis unit that analyzes the fine particles collected by the recovery unit, and the inspection target arrives at the nozzle. The compressed air is continuously or intermittently injected from the nozzle before the nozzle, and the state of the compressed air injection by the nozzle is continued at least until the inspection object passes in front of the nozzle. It is a feature.
Other solutions will be described as appropriate in the embodiments.

According to the present invention, it is an object to efficiently recover fine particles from an inspection object.

It is a figure which shows the structure of the dangerous goods detection system which concerns on 1st Embodiment. It is a figure which shows the specific structure of the particle | particle analysis part. It is the figure which looked at the vicinity of the peeling part and the recovery part from the top. It is a figure which shows the detailed structure of the particle | particle analysis part. It is a figure which shows the example which a plurality of intake ports are provided. It is a figure which shows the effect by shifting the intake port. It is a figure which shows the structure of the peeling part and the recovery part in 2nd Embodiment. It is a figure which shows the structure of the peeling part and the recovery part in 3rd Embodiment. It is a figure which shows the hardware configuration of a control device. It is a flowchart which shows the procedure of the process performed by a control device. It is a figure which shows the nozzle and the intake port in the conventional manner.

Next, an embodiment for carrying out the present invention (referred to as "embodiment") will be described in detail with reference to the drawings as appropriate. Further, in each drawing, the same reference numerals are given to the same configurations, and the description thereof will be omitted.

[First Embodiment]
(Dangerous goods detection device 1)
FIG. 1 is a diagram showing a configuration of a dangerous goods detection system Z according to the first embodiment.
The dangerous goods detection system (analysis system) Z has a dangerous goods detection device (analysis device) 1 and a control device 3.
The dangerous goods detection device 1 has a fine particle analysis unit 100, a bulk inspection unit 201, and a transport unit 202. The control device 3 controls the fine particle analysis unit 100 and the bulk inspection unit 201, and acquires the inspection results by the fine particle analysis unit 100 and the bulk inspection unit 201.
The particle analysis unit 100 performs trace detection, and the bulk inspection unit 201 performs bulk detection.

When the bag B, which is the object to be inspected, is placed on the transport unit 202 represented by the belt conveyor, the bag B is transported to the inside of the dangerous goods detection device 1. A particle analysis unit 100 is provided inside the dangerous substance detection device 1. The fine particle analysis unit 100 analyzes the components of the fine particles P adhering to the surface of the bag B. Further, as shown in the example of FIG. 1, a bulk such as an X-ray inspection device is connected in series with the fine particle analysis unit 100 along the direction (white arrow) in which the bag B placed on the transport unit 202 is transported. The inspection unit 201 is provided. Incidentally, the bulk inspection unit 201 can be omitted. By doing so, it is possible to simultaneously analyze the fine particles P adhering to the bag B and confirm the inside by bulk inspection in one inspection. In addition, which of the order of fine particle analysis and bulk inspection may be carried out first.

(Particle analysis unit 100)
FIG. 2 is a diagram showing a specific configuration of the fine particle analysis unit 100.
The fine particle analysis unit 100 includes sensors 101a to 101d, a peeling unit 110, a compressed air supply unit 120, a recovery unit 130, a concentration unit 140, and an analysis unit 150. Further, the control device 3 is electrically connected to the sensors 101a to 101d, the compressed air supply unit 120, the concentration unit 140, and the analysis unit 150.
First, as shown in FIG. 1, when the bag B is placed on the transport unit 202, the bag B is transported inside the dangerous goods detection device 1. Then, as shown in FIG. 1, the bag B transported to the inside of the dangerous substance detection device 1 is subjected to component analysis of the fine particles P adhering to the surface of the bag B in the fine particle analysis unit 100.
Near the entrance of the fine particle analysis unit 100,

sensors

101a and 101b for detecting that the bag B is close to the peeling unit 110 and the collecting unit 130 are provided. When the

sensors

101a and 101b detect the passage (arrival) of the bag B, the compressed air W is continuously ejected from the nozzle 111 (see FIG. 3) provided in the peeling portion 110. At this time, it is desirable that the recovery of the fine particles P by the recovery unit 130 is also turned on. That is, when the

sensors

101a and 101b detect the passage (arrival) of the bag B, the intake of the cyclone type dust collector (cyclone type dust collector) 141 (see FIG. 4) provided in the concentration unit 140 is turned on.

Incidentally, the

sensors

101a and 101b are, for example, photoelectric sensors in which the light emitting unit (sensor 101a) and the light receiving unit (sensor 101b) are arranged so as to face each other. In this photoelectric sensor, the light emitted from the light emitting unit (sensor 101a) is blocked or reflected by the bag B, so that the amount of light reaching the light receiving unit (sensor 101b) changes, so that the object passes through. (The arrival of the object between the

sensors

101a and 101b) is detected.

The injection of compressed air W from the nozzle 111 is performed in synchronization with the detection of the bag B by the

sensors

101a and 101b. That is, the compressed air W may be injected at the same time as the detection of the bag B. Further, the compressed air W may be injected with a predetermined time lag from the detection of the bag B based on the distance from the positions of the

sensors

101a and 101b to the peeling portion 110 (nozzle 111).

The bag B continues to be transported even after it reaches between the

sensors

101a and 101b. That is, the bag B is conveyed without stopping between the peeling section 110 and the collecting section 130 in order to sample the fine particles P adhering to the surface of the bag B. The peeling portion 110 is connected to a compressed air supply portion 120 such as a compressor or a gas pipe via a pipe 161. The peeling portion 110 peels the attached fine particles P by injecting compressed air W onto the surface of the bag B. The peeled fine particles P are collected from the collection unit 130 and sent to the concentration unit 140 via the pipe 162. The fine particles P concentrated in the concentrating unit 140 are sent to the analysis unit 150 via the pipe 163 and detected.

Further,

sensors

101c and 101d (photoelectric sensors) are also provided near the outlet of the fine particle analysis unit 100. When the

sensors

101c and 101d detect that the bag B has passed between the peeling portion 110 and the collecting portion 130, the control device 3 stops the injection of the compressed air W from the nozzle 111. At this time, it is desirable that the recovery of the fine particles P by the recovery unit 130 is also turned off. By doing so, the consumption of compressed air W can be reduced.

Incidentally, the

sensors

101c and 101d have a role of detecting that the bag B has passed (finished) between the peeling portion 110 and the collecting portion 130 or in front of the peeling portion 110. .. For example, when the distance from the position of the peeling portion 110 to the

sensors

101c and 101d is longer than the length of the bag B, the

sensors

101c and 101d detect that the bag B has reached between the

sensors

101c and 101d. Arranged (arranged to detect the tip of the bag B). On the other hand, when the distance from the position of the peeling portion 110 to the

sensors

101c and 101d is shorter than the length of the bag B, the

sensors

101c and 101d detect that the bag B has passed between the

sensors

101c and 101d. (Arranged to detect that the rear end of the bag B has passed).
As for the

sensors

101a and 101b, it can be appropriately determined whether to detect the arrival of the bag B or the end of the passage of the bag B.

The control device 3 receives the signals sent from the

sensors

101a and 101b and the

sensors

101c and 101d. Further, the control device 3 controls the operation of the compressed air supply unit 120 and the concentration unit 140. Further, it receives a signal sent from the analysis unit 150.

(Peeling part 110 and collecting part 130)
FIG. 3 is a top view of the vicinity of the peeling portion 110 and the collecting portion 130.
As shown in FIG. 3, the peeling portion 110 is provided with a nozzle 111. The height of the nozzle 111 is adjusted to the position of the upper surface of the bag B. When the bag B mounted on the transport unit 202 approaches the nozzle 111, the compressed air W is continuously ejected from the nozzle 111 in advance. Whether or not the bag B has approached the nozzle 111 is detected by the

sensors

101a and 101b as described above.

However, in order to reduce the consumption of the compressed air W, it is possible to repeat the injection and the stop of the compressed air W at very short intervals to make a substantially continuous injection (intermittent injection). For example, the compressed air W may be injected for 0.1 seconds, and the injection may be stopped for the next 0.1 seconds, which may be repeated at short intervals. While the compressed air W is being injected, the bag B transported by the transport unit 202 passes in front of the peeling unit 110 (nozzle 111), so that the fine particles P adhering to the upper surface of the bag B are compressed air. Peel off with W. As shown in FIG. 3, as the bag B is conveyed, the location where the compressed air W hits the upper surface of the bag B changes. As a result, no matter where the fine particles P are attached to the upper surface of the bag B including the handle B1, the fine particles P can be peeled off and recovered by the recovery unit 130.

In FIG. 3, the compressed air W injected from the nozzle 111 is strongest in the central portion and weakens toward the outside. In FIG. 3, the strength of the compressed air W is indicated by the thickness of the broken line arrow. The thicker the dashed arrow, the stronger the compressed air W. Seen from the fine particles P adhering to the surface of the bag B, as the bag B is transported and approaches the direction of the nozzle 111, it is gradually exposed to a strong wind. Then, when the peeling force generated by the compressed air W exceeds the adhesive force of the fine particles P on the surface, the fine particles P are peeled off. Therefore, the fine particles P fly toward the front side of the direction toward which the center of the nozzle 111 faces, with reference to the transport direction of the bag B. Here, the front side means the entrance side of the fine particle analysis unit 100, and is shown on the right side of the paper in FIG. Explaining this with reference to FIG. 3, since the compressed air W injected in the installation direction of the nozzle 111 (the axial direction of the nozzle 111) is the strongest, most of the fine particles P are in the installation direction of the nozzle 111 (nozzle 111). This is because it peels off before reaching (directly in front of 111).

Here, as shown in FIG. 3, it is better to provide the intake port 131 of the collection unit 130 for collecting the fine particles P on the front side with respect to the transport direction of the bag B, rather than arranging the intake port 131 at a position facing the nozzle 111. Fine particles P can be recovered more efficiently. That is, it is desirable that the intake port 131 is installed on the front side (inlet side) of the position facing the nozzle 111.

However, the center of the intake port 131a may be installed at a position facing the nozzle 111 (directly in front of the nozzle 111). However, the recovery efficiency can be improved if the centers of the

intake ports

131b and 131c are not installed at positions facing the nozzle 111 or the intake ports 131a to 131c are not installed on the inner side.

Further, as described above, when the cyclone type dust collector 141 is adopted in the concentrating unit 140, it is difficult to increase the flow rate of the intake air. That is, while the compressed air W is being injected from the nozzle 111, the injection flow rate is larger than the intake flow rate. Therefore, it is difficult to efficiently recover the fine particles P separated by the compressed air W. The flow rate of the compressed air W is smaller on the outside than in the center of the compressed air W. Therefore, as described above, when the intake port 131 is provided at a position deviated from the direction in which the nozzle 111 faces to the front side (right side of the paper surface (rear side in the transport direction or movement direction of the bag B)), the fine particles P are on the front side. Fly to (on the right side of the page). Therefore, by providing the intake port 131 at a position shifted to the front side (right side of the paper surface) from the direction in which the nozzle 111 faces, it becomes possible to efficiently collect the fine particles P flying in the direction of the intake port 131.

Further, in order to increase the suction flow rate of the collection unit 130, as shown in FIG. 3, a plurality of intake ports 131a to 131c may be provided, and a cyclone type dust collector 41 may be connected to each of the

intake ports

131a, 131b, 131c. .. In the example shown in FIG. 3, three intake ports 131a to 131c are shown, but the number is not limited to three. A configuration in which a plurality of intake ports 131 and a plurality of concentration units 140 are provided will be described later.
As described above, after the bag B has passed between the peeling portion 110 and the collecting portion 130 (or in front of the nozzle 111), the compressed air W injected from the nozzle 111 is stopped.

(Details of Particle Analysis Unit 100)
FIG. 4 is a diagram showing a detailed configuration of the fine particle analysis unit 100.
FIG. 4 shows a configuration in which the particle analysis unit 100 of the dangerous goods detection device 1 according to the first embodiment is viewed from the insertion direction of the bag B.
Further, in FIG. 4, the same components as those in FIGS. 2 and 3 are designated by the same reference numerals and the description thereof will be omitted.
The peeling portion 110 has a nozzle 111. The collection unit 130 has an intake port 131. The concentrator 140 has a cyclone type dust collector 141 and an exhaust fan 142. The analysis unit 150 has a filter 151, a heater 152, a heater 153 in which the pipe 163 is penetrated, and a mass spectrometer 154.

Note that, in FIG. 4, only one intake port 131 is shown in order to avoid complicating the figure. With the compressed air W being sprayed from the nozzle 111 in advance, the bag B passes in front of the nozzle 111 by the transport unit 202. The compressed air W peels off the fine particles P adhering to the upper surface of the bag B, and the peeled fine particles P are blown toward the recovery unit 130. It is desirable that a dome-shaped covering portion 171 is provided between the peeling portion 110 and the collecting portion 130 so that the air flow is not disturbed. The nozzle 111 is fixed to the dome-shaped covering portion 171 by the nozzle support portion 172. It is preferable that the lining portion 171 and the nozzle support portion 172 are provided separately from the housing of the dangerous goods detection device 1.

The blown fine particles P are sucked into the intake port 131 provided in the collection unit 130 and introduced into the concentration unit 140 via the pipe 162. In the concentrating unit 140, the fine particles P and the gas are separated by the cyclone type dust collector 141. That is, in the cyclone type dust collector 141, the fine particles P are collected by the cyclone to increase the ratio of the fine particles P in the air toward the analysis unit 150. In this way, the concentration of the fine particles P in the air is increased (concentrated).

By providing such a concentration unit 140, it is possible to improve the detection efficiency of the component of the fine particles P in the analysis unit 150. Then, the fine particles P are collected by the filter 151 provided in the analysis unit 150. The gas introduced into the cyclone type dust collector 141 is exhausted by the exhaust fan 142. The filter 151 is heated to about 180 ° C. to 200 ° C. by the heater 152. With such a configuration, the fine particles P are vaporized by the heat of the heater 152 and become steam. The vapor of the vaporized fine particles P is introduced into the mass spectrometer 154 via the pipe 163 heated to about 180 ° C. by the heater 153. The mass spectrometer 154 analyzes the vapor of the vaporized fine particles P. When the explosive is detected as a result of the analysis, the control device 3 performs a process such as issuing an alarm.

(Example in which a plurality of intake ports 131 are provided)
FIG. 5 is a diagram showing an example in which a plurality of intake ports 131 are provided for the purpose of increasing the suction flow rate in order to collect the fine particles P more efficiently.
The

intake ports

131a, 131b, and 131c are arranged along the transport direction of the bag B (arrows in FIG. 3). The

intake ports

131a, 131b, 131c are connected to independent cyclone type dust collectors 141a to 141c via the pipes 162a to 162a, respectively. That is, cyclone type dust collectors 141a to 141c are connected to each of the three intake ports 131. Each of the cyclone type dust collectors 141a to 141c is provided with heaters 152a to 152c. The fine particles P taken in from the

respective intake ports

131a, 131b, 131c are separated from the air flow in the cyclone type dust collectors 141a to 141c. After that, the fine particles P are collected by a filter 151 (see FIG. 4) provided in the heaters 152a to 152c provided in the cyclone type dust collectors 141a to 141c. Further, the airflow separated from the fine particles P is discharged to the outside of the cyclone type dust collectors 141a to 141c from the exhaust fans 142 (see FIG. 4) attached to the cyclone type dust collectors 141a to 141c. The steam of the fine particles P generated by the heat vaporization is collected in the pipe 163 and introduced into the mass spectrometer 154.

FIG. 5 describes a configuration in which three intake ports 131 are provided in parallel as an example, but the number of intake ports 131 is not limited to this and may be further increased or may be two. The flow rate that can be sucked into one cyclone type dust collector 141 is limited. By providing a plurality of intake ports 131 and using a plurality of cyclone type dust collectors 141a to 141c to separate the airflow and the fine particles P, the suction flow rate in the collection unit 130 can be increased by the number of the cyclone type dust collectors 141a to 141c. .. The number of the intake port 131 and the number of the cyclone type dust collector 141 do not have to be the same.

(Effect of shifting the intake port 131)
FIG. 6 is a diagram showing the effect of shifting the intake port 131.
Here, the test was conducted after the fine particles P to which the explosive molecules were adsorbed were attached to the upper surface of the bag B. In the test, compressed air W was sprayed from the nozzle 111 in advance, and when the bag B passed between the nozzle 111 and the intake port 131, a signal derived from the explosive was clearly obtained. The broken line 401 shows a signal when the center of the nozzle 111 and the center of the intake port 131 are installed so as to face each other. On the other hand, in the solid line 402, the intake port 131 is installed so that the center of the nozzle 111 and the center of the intake port 131 deviate from each other, and the intake port 131 is arranged on the entrance side of the particle analysis unit 100 of the bag B. Shows the signal when there is. As shown by the broken line 401, the signal is detected even when the center of the nozzle 111 and the intake port 131 are arranged so as to face each other. However, as shown by the solid line 402, the intake port 131 is installed so that the center of the nozzle 111 and the center of the intake port 131 are deviated from each other, and the intake port 131 is arranged on the inlet side of the fine particle analysis unit 100. (That is, by arranging as shown in FIG. 3), a stronger signal could be detected.

In the first embodiment, the compressed air W is continuously injected in advance before the bag B passes in front of the nozzle 111. This makes it possible to detect the fine particles P regardless of the position on the upper surface of the bag B where the fine particles P are attached. Therefore, the convenience of the dangerous goods detection device 1 is improved, and the dangerous goods detection device 1 with higher sensitivity becomes possible. Further, even when the bag B is moved by the transport unit 202, the fine particles P can be collected without stopping the movement of the transport unit 202. As a result, the recovery efficiency of the fine particles P can be improved without reducing the throughput of the dangerous substance detection device 1.
As described above, according to the first embodiment, in the inspection of the inspection object such as the bag B, the fine particles P adhering to the surface of the inspection object are efficiently recovered regardless of the place where the fine particles P are attached. You will be able to analyze. As a result, the convenience of the dangerous goods detection device 1 is improved, and high-sensitivity inspection can be realized.

Further, since the intake port 131 is installed on the front side with respect to the central axis (axis direction) of the nozzle 111, the recovery efficiency of the fine particles P can be improved.
Further, a plurality of intake ports 131 are provided, and cyclone type dust collectors 141a to 141c are provided in each of the intake ports 131a to 131b. As a result, the suction flow rate and the recovery area can be increased, and the fine particles P can be reliably recovered.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. 7.
With respect to the conventional techniques, it is desired to efficiently recover the fine particles P from the side surface of the bag B. On the other hand, in the second embodiment and the third embodiment, it is an object to collect the fine particles P from the side surface of the bag B.

FIG. 7 is a diagram showing the configuration of the peeling unit 110 and the collecting unit 130 in the second embodiment. In FIG. 7, the same components as those of the drawings so far are designated by the same reference numerals, and the description thereof will be omitted.
In the first embodiment, the method of recovering the fine particles P adhering to the upper surface of the bag B with high efficiency has been described, but in the second embodiment, the case of recovering the fine particles P from the side surface of the bag B will be described.
As shown in FIG. 7, in the second embodiment, the nozzle 111 and the intake port 131 are arranged side by side with respect to the bag B on one side of the bag B. An airflow control unit 181 is installed on the movement source side of the bag B with respect to the intake port 131. Similar to the first embodiment, when the

sensors

101a and 101b arranged on the front side of the peeling portion 110 and the collecting portion 130 detect the passage (arrival) of the bag B, the compressed air W is continuously injected from the nozzle 111. .. Alternatively, the compressed air W may be injected in advance. Then, the bag B is conveyed by the conveying unit 202 in the direction of the white arrow, and when the bag B arrives in front of the nozzle 111, an air flow W1 along the side surface of the bag B is generated. An airflow control unit 181 that acts as a resistance to the airflow W1 is provided in the direction in which the airflow W1 is directed along the bag B. Similar to the first embodiment, the compressed air W is continuously or intermittently while the bag B is passing between the peeling portion 110 and the collecting portion 130 (while passing in front of the collecting portion 130). It is sprayed. The same applies to the third embodiment described later.

By narrowing the gap between the airflow control unit 181 and the bag B, the airflow W1 is concentrated in the narrow gap between the airflow control unit 181 and the bag B. Therefore, a high pressure portion H (a portion where the flow velocity of the airflow W1 is slow) having a high pressure is generated in the gap between the airflow control unit 181 and the bag B. Due to the influence of the high pressure portion H, a part of the airflow W1 flowing along the side surface of the bag B also heads toward the intake port 131 (solid arrow). Therefore, a part of the fine particles P separated from the side surface of the bag B by the compressed air W is sucked from the intake port 131, concentrated by the cyclone type dust collector 141 via the pipe 162, and analyzed.

According to the second embodiment, the fine particles P adhering to the side surface of the bag B can be recovered. Further, by injecting the compressed air W while transporting the bag B and collecting the fine particles P peeled off by the compressed air W, the fine particles P can be recovered regardless of the position on the side surface of the bag. can do. Further, even when the bag B is moved by the transport unit 202, the fine particles P can be collected without stopping the movement of the transport unit 202. As a result, the recovery efficiency of the fine particles P can be improved without reducing the throughput of the dangerous substance detection device 1.

The nozzle 111, the intake port 131, and the airflow control unit 181 arranged as shown in FIG. 7 may be provided on both sides of the bag B. By doing so, the fine particles P can be recovered from both side surfaces of the bag B.
Further, the arrangement relationship between the nozzle 111 and the airflow control unit 181 may be reversed from that in FIG. 7. That is, the nozzle 111 may be installed on the moving source side of the bag B, and the airflow control unit 181 may be installed on the moving destination side of the bag B. It should be noted that the relative velocity difference between the airflow W1 and the bag B can be increased when the direction of the airflow from the nozzle 111 and the transport direction of the bag B are opposite to each other rather than the same direction. Is preferable.

[Third Embodiment]
FIG. 8 is a diagram showing the configuration of the peeling unit 110 and the collecting unit 130 in the third embodiment. In FIG. 8, the same reference numerals are given to the same configurations as in FIG. 7, and the description thereof will be omitted.
Similar to the second embodiment, the third embodiment also describes the case where the fine particles P are collected from the side surface of the bag B.
In the third embodiment, the nozzle 111 is arranged inside the intake port 131. Further, the airflow control unit 181a is provided on the movement source side and the movement destination side of the bag B with respect to the intake port 131. Then, as described above, when the passage of the bag B is detected by the

sensors

101a and 101b installed in front of the peeling portion 110 and the collecting portion 130, the compressed air W is injected from the nozzle 111. Compressed air W may be injected in advance. Then, when the bag B is transported in the direction of the white arrow by the transport unit 202 and arrives in front of the nozzle 111, an air flow (flow of compressed air W) along the side surface of the bag B is generated.

Airflow control units

181a and 181b are provided in the direction in which the airflow is directed along the bag B so as to resist the airflow. When the gap between the

airflow control units

181a and 181b and the bag B becomes narrow, the airflow concentrates in the gap between the

airflow control units

181a and 181b and the bag B. Therefore, as in the second embodiment, high-pressure portions Ha and Hb (portions where the flow velocity of the air flow is slow) are generated. Due to the influence of the high-pressure portions Ha and Hb, a part of the airflow flowing along the side surface of the bag B also goes toward the intake port 131 (solid arrow). Therefore, a part of the fine particles P separated from the side surface of the bag B by the compressed air W is sucked from the intake port 131. The sucked fine particles P are concentrated by the cyclone type dust collector 141 via the pipe 162 and analyzed by the analysis unit 150. Since the peeling section 110 and the recovery section 130 can be made more compact than the second embodiment, such a configuration of the third embodiment is advantageous when the dangerous substance detection device 1 is downsized.

Note that nozzles 111, intake ports 131, and

airflow control units

181a and 181b arranged as shown in FIG. 8 may be provided on both sides of the bag B. By doing so, the fine particles P can be recovered from both side surfaces of the bag B.

[Control device 3]
FIG. 9 is a diagram showing a hardware configuration of the control device 3. Refer to FIGS. 2 and 4 as appropriate.
The control device 3 includes a memory 310, a CPU (Central Processing Unit) 321 and a communication device 322, a storage device 330 such as an HD (Hard Disk) and an SSD (Solid State Drive).
The program stored in the storage device 330 is loaded into the memory 310, and the loaded program is executed by the CPU 321.
As a result, the detection processing unit 311, the intake air control unit 312, the nozzle control unit 313, and the bulk inspection control unit 314 are embodied.
The detection processing unit 311 determines whether or not the bag B is close to the fine particle analysis unit 100 based on the signals sent from the

sensors

101a and 101b. Further, the detection processing unit 311 determines whether or not the bag B has passed through the fine particle analysis unit 100 based on the signals sent from the

sensors

101c and 101d.

The intake control unit 312 controls the drive of the exhaust fan 142 provided in the cyclone type dust collector 141 based on the determination of the approach and passage of the bag B by the detection processing unit 311.
The nozzle control unit 313 controls a valve (not shown) based on the determination of the approach and passage of the bag B by the detection processing unit 311 and controls the ejection of the compressed air W by the nozzle 111.
The bulk inspection control unit 314 controls the bulk inspection by the bulk inspection unit 201.

The communication device 322 receives signals from the sensors 101a to 101d. Further, the communication device 322 sends a control command to the valve (not shown) of the compressed air supply unit 120 and the exhaust fan 142 of the concentration unit 140. Further, the communication device 322 receives a signal sent from the mass spectrometer 154 of the analysis unit 150.

[flowchart]
FIG. 10 is a flowchart showing a procedure of processing performed by the control device 3. Refer to FIGS. 2 and 9 as appropriate. The process performed in this flowchart is a process common to the first embodiment, the second embodiment, and the third embodiment.
First, the bag B is transported by the transport unit 202 (S101). The transport unit 202 may be constantly operating, or may be operated when the placement of the bag B is detected.
Subsequently, it is determined whether or not the detection processing unit 311 has detected the bag B by the

sensors

101a and 101b (S102).
If the bag B is not detected (S102 → No), the control device 3 returns the process to step S101.
When the bag B is detected (S102 → Yes), the intake control unit 312 starts the intake of the recovery unit 130 (S103), and the nozzle control unit 313 starts the injection of the compressed air W by the nozzle 111 (S104). Here, either step S103 or step S104 may be performed first, or may be performed at the same time. Further, the intake control unit 312 starts the intake of the collection unit 130 by turning on the exhaust fan 142 of the cyclone type dust collector 141. Then, the nozzle control unit 313 controls the injection of the compressed air W by controlling the valve.

Subsequently, the detection processing unit 311 determines whether or not the bag B has passed between the peeling unit 110 and the collecting unit 130 by the

sensors

101c and 101d (S111). As described above, when the distance between the

sensors

101c and 101d and the peeling unit 110 and the collecting unit 130 is short, and when the

sensors

101c and 101d are completely passed, the detection processing unit 311 determines “Yes” in step S111. do. In this case, when the detection signal of the bag B by the sensor 101c and the sensor 101c is received once and then the detection signal of the bag B is no longer received, the detection processing unit 311 determines that the bag B has passed through the

sensors

101c and 101d. do. However, as described above, when the distance between the

sensors

101c and 101d and the peeling unit 110 and the collecting unit 130 is long, and when the tip of the bag B reaches the

sensors

101c and 101d, the detection processing unit 311 may perform step S111. Judges as "Yes". In this case, when the detection signal of the bag B by the sensor 101c and the sensor 101c is received, it is determined that the bag B has reached the

sensors

101c and 101d.
If the bag B has not passed (S111 → No), the control device 3 returns the process to step S103.
When the bag B is passing (S111 → Yes), the intake control unit 312 stops the intake of the recovery unit 130 (S112), and the nozzle control unit 313 stops the injection of the compressed air W by the nozzle 111 (S113). ). Here, either step S112 or step S113 may be performed first, or may be performed at the same time. Further, the intake control unit 312 stops the intake of the collection unit 130 by turning off the exhaust fan 142 of the cyclone type dust collector 141. Then, the nozzle control unit 313 stops the injection of the compressed air W by controlling the valve.

After that, the bulk inspection control unit 314 performs a bulk inspection by the bulk inspection unit 201 (S121), and the inspector takes out the bag B from the dangerous goods detection device 1 (S122).

The storage device 330 shown in FIG. 9 may be installed on the cloud.
Further, in the second embodiment and the third embodiment, the airflow control unit 181 is installed on the movement source side and the movement destination side of the bag B with respect to the intake port 131, but the present invention is not limited to this. For example, it may be provided on the upper side and the lower side of the intake port 131. Here, the top indicates the direction opposite to the direction of gravity, and the bottom indicates the direction in the direction of gravity. Alternatively, in the second embodiment and the third embodiment, the airflow control unit 181 is installed so as to form a substantially sealed space between the airflow control unit 181 and the intake port 131 and the side surface of the bag B. May be good. By doing so, the recovery efficiency of the fine particles P can be further improved.

Further, in the second embodiment and the third embodiment, a plurality of intake ports 131 may be arranged, and a cyclone type dust collector 141 or a heater 152 may be connected to each of the plurality of intake ports 131.
The control device 3 may be an integral device with the dangerous goods detection device 1.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

Further, each of the above-mentioned configurations, functions, parts 311 to 314, the storage device 330, and the like may be realized by hardware, for example, by designing a part or all of them by an integrated circuit or the like. Further, as shown in FIG. 9, each configuration, function, etc. described above may be realized by software by interpreting and executing a program in which a processor such as a CPU 321 realizes each function. In addition to storing information such as programs, tables, and files that realize each function in HD (Hard Disk), a memory 310, a recording device such as SSD, an IC (Integrated Circuit) card, or SD (Secure). It can be stored in a recording medium such as a Digital) card or DVD (Digital Versatile Disc).
Further, in each embodiment, the control lines and information lines are shown as necessary for explanation, and not all the control lines and information lines are shown in the product. In practice, you can think of almost all configurations as interconnected.

1 Dangerous goods detection device (analyzer)
3 Control device 100

Particle analyzer

101a, 101b Sensor (first sensor)
101c, 101d sensor (second sensor)
110 Peeling part 111 Nozzle 120 Compressed air supply part 130

Recovery part

131, 131a, 131b, 131c Intake port 140 Concentrating

part

141, 141a, 141b, 141c Cyclone type dust collector (Cyclone type dust collector)
142 Exhaust fan 150 Analytical unit 154 Mass spectrometer 181,181a, 181b Airflow control unit 202 Transport unit B Bag (inspection target)
H, Ha, Hb High pressure part P Fine particles W Compressed air W1 Airflow (flow of compressed air)
Z Dangerous goods detection system (analysis system)

Claims

A transport unit that transports the object to be inspected,
A nozzle that injects compressed air to separate substances adhering to the inspection object, and
A recovery unit that collects fine particles separated from the inspection object by the compressed air ejected from the nozzle, and a recovery unit.
An analysis unit that analyzes the fine particles collected by the collection unit, and an analysis unit.
Have,
The compressed air is continuously or intermittently ejected from the nozzle before the inspection object arrives at the nozzle.
An analyzer characterized in that the state of injection of the compressed air by the nozzle is continued at least until the object to be inspected passes in front of the nozzle.
The collection unit has an intake port for collecting the fine particles peeled off by intake air.
The nozzle and the intake port are arranged so as to sandwich the transport portion.
The analyzer according to claim 1, wherein the intake port is arranged at a position displaced from the central axis of the nozzle toward the moving source side of the inspection object.
A plurality of the intake ports are arranged side by side so as to be along the transport direction of the inspection object.
The analyzer according to claim 2, wherein the plurality of intake ports are provided with a plurality of concentration units for concentrating the substance recovered at the intake port and sending the concentrated substance to the analysis unit. ..
The nozzle and the collection unit are arranged on the same side with respect to the transport unit.
The analyzer according to claim 1, further comprising an airflow control unit that blocks the flow of the compressed air ejected from the nozzle toward the inspection object.
The nozzle is provided inside the collection unit, and the nozzle is provided.
The analyzer according to claim 1, further comprising an airflow control unit that blocks the flow of compressed air ejected from the nozzle toward the inspection object.
The analyzer according to claim 1, further comprising a concentrating unit that concentrates the substance collected by the collecting unit and sends the concentrated substance to the analysis unit.
The analyzer according to claim 6, wherein the concentrating unit is a cyclone-type dust collecting unit that collects the fine particles by a cyclone.
A transport unit that transports the object to be inspected,
A nozzle that injects compressed air to separate substances adhering to the inspection object, and
A recovery unit that collects fine particles separated from the inspection object by the compressed air ejected from the nozzle, and a recovery unit.
An analysis unit that analyzes the fine particles collected by the collection unit, and an analysis unit.
Have,
The compressed air is continuously or intermittently ejected from the nozzle before the inspection object arrives at the nozzle.
An analytical system characterized in that the state of injection of the compressed air by the nozzle is continued at least until the object to be inspected passes in front of the nozzle.
A first sensor provided on the moving source side of the inspection object with respect to the nozzle and the recovery unit, and
A second sensor provided on the destination side of the inspection target with respect to the nozzle and the recovery unit, and
A control unit that controls the injection of the compressed air by the nozzle and the intake air of the recovery unit based on the signals sent from the first sensor and the second sensor.
Have,
The control unit
Based on the signal from the first sensor, the injection of the compressed air by the nozzle is started, and the intake by the recovery unit is started.
The analysis system according to claim 8, wherein the injection of the compressed air by the nozzle is stopped and the intake air by the recovery unit is stopped based on the signal by the second sensor.
A transport unit that transports the object to be inspected,
A nozzle that injects compressed air to separate substances adhering to the inspection object, and
A recovery unit that collects fine particles separated from the inspection object by the compressed air ejected from the nozzle, and a recovery unit.
An analysis unit that analyzes the fine particles collected by the collection unit, and an analysis unit.
A control unit that controls the injection of the compressed air by the nozzle and the intake air of the recovery unit.
The control unit of the analytical system having the
An analytical method characterized in that the state of injection of the compressed air by the nozzle is continued at least until the object to be inspected passes in front of the nozzle.
A first sensor provided on the moving source side of the inspection object with respect to the nozzle and the recovery unit, and
A second sensor provided on the destination side of the inspection target with respect to the nozzle and the recovery unit, and
Have,
The control unit
Based on the signal from the first sensor, the injection of the compressed air by the nozzle is started, and the intake by the recovery unit is started.
The analysis method according to claim 10, wherein the injection of the compressed air by the nozzle is stopped and the intake air by the recovery unit is stopped based on the signal from the second sensor.