Adherent substance inspection device

Abstract

To provide an adhering material inspection device which can improve detection sensitivity of an adhering material.SOLUTION: An adhering material inspection device 1 comprises: a first wall part 10 and a second wall part 20 which are arranged so as to extend along a reference axis and oppose each other and form an inspection space of an inspection object therebetween; a collection part 11 which has a suction path 13 communicating to the inspection space; a jetting part 12 which continuously injects a layered jet including a gas of the inspection space obtained via the collection part 11 along an inlet surface of the inspection space which the inspection object enters toward the second wall part 20 from the first wall part 10; and an analysis part 32 which analyzes an adhering material of the inspection object or a specific material derived from the adhering material from the gas of the inspection space obtained via the collection part 11. The second wall part 20 includes a recess 21 which opposes the first wall part 10 and extends along the reference axis. The jetting part 12 has a nozzle 16 for generating the jet. The nozzle 16 is oriented to an edge 21a closer to the inlet surface out of a pair of edges 21a, 21a of the recess 20 along the reference axis.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an apparatus for inspecting for attached substances. [Background technology]

[0002] Patent Document 1 discloses an inspection device for detecting substances attached to humans. This inspection device is equipped with a collection gate. A gas injection unit and a suction port are attached to the collection gate, and the gate is installed in a collection passage or the like. When a subject enters the collection gate, the gas injection unit injects compressed gas toward the subject. Substances attached to the subject are separated by the injection of compressed gas and collected from the suction port. The collected substances are analyzed by an analysis unit.

[0003] The suction port is provided near the side of the human body, i.e., near the hands, arms, and shoulders where substances tend to adhere, which increases the possibility of shortening the time from separation to collection of the adhered substances, enabling rapid testing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-1829 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, when detecting attached substances, compressed gas or other gas is directly sprayed onto the person being tested. The longer the spray time, the easier it is for the attached substances to separate from the test subject. However, if the attached substances are volatile substances or other substances that easily diffuse, the detection of the attached substances tends to be difficult due to the progress of diffusion and dilution. In addition, when the test subject is a person, the longer the time of exposure to compressed gas, the greater the stress, such as discomfort, tends to increase.

[0006] The present disclosure has been made in consideration of the above-mentioned circumstances, and has an object to provide an adhering substance inspection device capable of improving the detection sensitivity of adhering substances. [Means for solving the problem]

[0007] An adhesion inspection device according to one aspect of the present disclosure includes a first wall and a second wall extending along a reference axis and arranged opposite to each other to form an inspection space for an inspection object therebetween, a collection unit having an intake path communicating with the inspection space, an injection unit for continuously injecting a layered jet, including gas in the inspection space obtained through the collection unit and along an entrance surface of the inspection space through which the inspection object enters, from the first wall toward the second wall, and an analysis unit for analyzing the adhesion substance of the inspection object or a specific substance derived from the adhesion substance from the gas in the inspection space obtained through the collection unit. The second wall includes a recess facing the first wall and extending along the reference axis, and the injection unit has a nozzle for generating the jet, and the nozzle is directed to an edge of a pair of edges of the recess along the reference axis that is closer to the entrance surface.

[0008] The recess may include a pair of deflection surfaces that include the pair of edges and approach each other as they move away from the first wall, and that extend along the reference axis, and a connection surface that connects the pair of deflection surfaces. The recess may be formed by a concave surface that continues from one of the pair of edges to the other. The nozzle of the ejection unit may be formed in the first wall as a slit that extends along the reference axis. The first wall may include a recess that faces the second wall and extends along the reference axis. The adhering substance inspection device may further include an auxiliary ejection unit that ejects gas toward the inspection target in the inspection space. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide an adhering substance inspection device capable of improving the detection sensitivity of adhering substances. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of an attached substance inspection device according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a cross-sectional view of a first wall portion and a second wall portion according to an embodiment of the present disclosure. [Diagram 3] FIG. 2 is a block diagram showing the configuration of an adhering substance inspection device. [Figure 4] FIG. 2 is a diagram for explaining the operation of the attached substance inspection device. [Diagram 5] FIG. 13 is a top view of an adhering substance inspection device according to a modified example of an embodiment of the present disclosure. [Figure 6] 13 is a cross-sectional view of a second wall portion according to a modified example of an embodiment of the present disclosure. FIG. [Figure 7] 13 is a cross-sectional view of a first wall portion according to a modified example of an embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, several embodiments of the present disclosure will be described. Note that common parts in each drawing are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0012] The adhesion substance inspection device according to the present embodiment separates adhesion substances of an inspection target that has entered the device from the inspection target and inspects them. The inspection target is, for example, a person. However, the inspection target is not limited to this, and luggage, non-human organisms, and plants can also be applied. In addition, the installation location of the adhesion substance inspection device is, for example, a border with a specific site or a passageway leading thereto, such as an airport boarding gate or an entrance to an event hall. However, the installation location is not limited to these, and can be appropriately set according to the inspection purpose, etc. The adhesion substance is a substance that can be vaporized or powdered into fine particles. For example, when the adhesion substance inspection device is used as a security device that regulates the passage of people, etc., the adhesion substance is a toxic substance that has an adverse effect on the human body, such as a chemical agent or a biological agent.

[0013] The following describes an adhering substance inspection device 1 according to this embodiment. Fig. 1 is a perspective view of the adhering substance inspection device 1. Fig. 2 is a cross-sectional view of a first wall portion 10 and a second wall portion 20 perpendicular to a reference axis.

[0014] For ease of explanation, the X-axis, Y-axis, and Z-axis are defined as three mutually orthogonal axes. The X-axis and Y-axis are, for example, axes contained in a horizontal plane, with the X-axis extending in the left-right direction and the Y-axis extending in the depth direction (front-back direction). In contrast, the Z-axis extends in the vertical direction. In this embodiment, a person is assumed to be the subject of the inspection, and is referred to as subject X. Also, a reference axis is assumed as a basis for the arrangement of each component. In this embodiment, the reference axis is the Z-axis. However, if the passage of people, etc. is not taken into consideration, the reference axis may be either the X-axis or the Y-axis. Hereinafter, for ease of explanation, the adhesion substance inspection device will be simply referred to as an "inspection device."

[0015] As shown in FIG. 1, the inspection device 1 includes a first wall portion 10 and a second wall portion 20. The first wall portion 10 and the second wall portion 20 are plate-like members extending along the Z axis, and are disposed opposite each other at a predetermined interval along the X axis. As described later, the first wall portion 10 is provided with a collection portion 11 and an injection portion 12, and the second wall portion 20 is provided with a recess 21. The inspection device 1 may include a ceiling plate (not shown). The ceiling plate (not shown) is attached to the upper portion of each wall portion so as to cover the inspection space 30 between the first wall portion 10 and the second wall portion 20.

[0016] 1 and 2, the first wall 10 and the second wall 20 form an examination space 30 for an examination subject therebetween. The first wall 10 and the second wall 20 also define an entrance surface 30a of the examination space 30, which is an entrance for the subject X, and an exit surface 30b of the examination space 30, which is an exit for the subject X. The examination space 30 is a substantially rectangular space sandwiched between the first wall 10 and the second wall 20, and the entrance surface 30a and the exit surface 30b face each other in the direction along the Y axis with the examination space 30 sandwiched therebetween.

[0017] The examination space 30 has a dimension that allows the subject X to pass through. However, the dimension is kept such that the airflow from the jet 50 described below does not diffuse excessively. Therefore, the distance between the first wall 10 and the second wall 20 along the X-axis is set to a value slightly wider than the width of the subject. In this embodiment, this distance is set to a value slightly wider than the shoulder width of the assumed subject X. In addition, the height of the first wall 10 and the second wall 20 along the Z-axis is set to a value slightly higher than the height of the subject. In this embodiment, this height is set to a value slightly higher than the height of the assumed subject X.

[0018] In this way, the first wall portion 10 and the second wall portion 20 function as a gate that stands vertically relative to the floor surface 41 of the passage 40. However, at least one of the first wall portion 10 and the second wall portion 20 may be configured as a wall of the passage 40 in which the inspection device 1 is installed. For example, at least one of the first wall portion 10 and the second wall portion 20 may be embedded in the wall of the passage 40 so as to appear as one unit with it.

[0019] The inspection device 1 includes a collection unit 11 and an ejection unit 12. As shown in FIGS.

[0020] The collection unit 11 has a suction passage 13 that communicates with the testing space 30. The suction passage 13 is provided inside the first wall portion 10, and opens to an inner wall surface 10a of the first wall portion 10 that faces the testing space 30. The suction passage 13 is connected to the inlet side of a fan 14 of the ejection unit 12, and intake air begins with the rotation of the fan 14. In order to increase the suction force to the suction passage 13, the collection unit 11 may also have a fan 15 (see FIG. 2) installed in the suction passage 13.

[0021] The position of the collection section 11 (i.e., the opening position of the intake passage 13) is arbitrary as long as it does not excessively impede the flow of the circulating flow 52 described below. For example, the collection section 11 is located near the outlet surface 30b of the first wall section 10. The shape and number of the opening of the intake passage 13 are also arbitrary, and for example, it may be opened as a slit (groove) extending along the Z axis, and this may be divided into multiple parts at a predetermined interval. The analysis section 32 (see FIG. 5) is connected to the intake passage 13.

[0022] The ejection unit 12 continuously ejects a laminar jet 50, which contains the gas in the testing space 30 obtained via the collection unit 11, from the first wall unit 10 toward the second wall unit 20. The laminar jet 50 advances along the entrance surface 30a of the testing space 30. In other words, the laminar jet 50 crosses the entrance surface 30a so as to cover the entrance surface 30a.

[0023] The ejection section 12 has a nozzle 16 for generating a jet 50. The opening of the nozzle 16 may be formed as a slit (groove) extending along the Z axis, or may be composed of a plurality of small-diameter openings arranged at intervals along the Z axis. As long as a layered jet 50 is obtained, the shape of the opening of the nozzle 16 is arbitrary. In addition, the nozzle 16 is directed toward the edge 21a, which is closer to the inlet surface 30a, of a pair of edges 21a, 21a of the recess 21 along the Z axis. For example, the central axis (so-called nozzle axis) 16a of the nozzle 16 intersects with the deflection surface 22, which is closer to the inlet surface 30a, of a pair of deflection surfaces 22, 22 forming the recess 21 of the second wall section 20.

[0024] The ejection unit 12 has the above-mentioned fan 14. The fan 14 is provided between the nozzle 16 and the suction passage 13 of the collection unit 11, and compresses the gas in the suction passage 13 and supplies the compressed gas to the nozzle 16.

[0025] As described above, the jet 50 is jetted across the inlet surface 30a. Therefore, the subject X who passes through the inlet surface 30a is inevitably exposed to the jet 50. The jet 50 separates a substance (adhered substance) that has been attached to the subject X from the subject X. For example, if the attached substance is a volatile substance, the jet 50 promotes the volatilization of the substance. Also, if the attached substance is a powder, the jet 50 blows away the powder.

[0026] 1 and 2, the second wall 20 has a recess 21 facing the first wall 10 (testing space 30). The recess 21 is formed on an inner wall surface 20a of the second wall 20 facing the test space 30, and extends along the Z-axis while recessing from the inner wall surface 20a. The cross-sectional shape of the recess 21 in a horizontal plane is constant along the Z-axis.

[0027] As shown in Fig. 2, the recess 21 has a pair of deflection surfaces 22, 22 extending along the Z axis, and a connection surface 23 connecting the pair of deflection surfaces 22, 22. The pair of deflection surfaces 22, 22 are a pair of tapered surfaces that include a pair of edges 21a, 21a and that become closer to each other as they move away from the first wall portion 10. Each deflection surface 22 is curved so as to be recessed toward the outside of the inspection device 1. On the other hand, the connection surface 23 is a plane parallel to the Y axis and the Z axis, or a curved surface recessed in a direction away from the first wall portion 10.

[0028] 3 is a block diagram showing the configuration of the inspection device 1. As shown in this figure, the inspection device 1 includes an analysis unit 32, a notification unit , and a control unit .

[0029] The analysis unit 32 includes at least a pump (not shown) and a sensor (not shown), and is connected to the suction passage 13 of the collection unit 11. The analysis unit 32 analyzes the attached substances or specific substances derived from the attached substances supplied from the collection unit 11, and identifies the type and concentration of the attached substances, etc. The sensor is appropriately selected depending on the substance to be identified. The analysis unit 32 may include multiple types of sensors depending on the substance to be identified. The analysis results by the analysis unit 32 are transmitted to the control unit 36.

[0030] The notification unit 34 issues an alarm or the like around the inspection device 1 based on a control signal received from the control unit 36. The notification unit 34 is composed of a speaker, a buzzer, an indicator light, and the like.

[0031] The control unit 36 ​​is a computer equipped with input / output units such as a keyboard, a display, a memory, a central processing unit (CPU), a communication unit, etc., and by executing a predetermined program, it controls the electrical equipment that constitutes the inspection device 1, such as the fan 14 of the ejection unit 12, the analysis unit 32, and the notification unit 34, and executes predetermined processing.

[0032] For example, the control unit 36 ​​controls the operation of the fan 14. Furthermore, the control unit 36 ​​compares the concentration of the adhering substance with a pre-stored threshold value based on the analysis result sent from the analysis unit 32, and if the concentration exceeds the threshold value, controls the notification unit 34 to issue a notification such as an alarm.

[0033] Next, the operation of the inspection device 1 will be described with reference to FIG. 4 is a diagram for explaining the operation of the inspection device 1. For ease of explanation, of the pair of deflection surfaces 22, 22, the deflection surface 22 closer to the entrance surface 30a will be referred to as deflection surface 22A, and the deflection surface 22 closer to the exit surface 30b will be referred to as deflection surface 22B.

[0034] FIG. 4(a) is a diagram showing a state before the subject X enters the testing space. It is assumed that the fan 14 is already operating. Therefore, gas in the testing space 30 continuously flows into the suction passage 13. The flowing gas is compressed by the fan 14 and supplied to the nozzle 16. The compressed gas supplied to the nozzle 16 is ejected from the nozzle 16 as a jet 50. The jet 50 flows in a layered manner along the entrance surface 30a of the testing space 30 from the first wall portion 10 toward the second wall portion 20. Therefore, the jet 50 flows so as to substantially cover the entrance surface 30a.

[0035] The recess 21 of the second wall portion 20 receives a jet 50 ejected from the ejection portion 12. The jet 50 is ejected toward the edge 21a of the recess 21 close to the inlet face 30a. Thus, the airflow 51 of the jet 50 is deflected by the deflection surface 22A in a direction from the inlet face 30a toward the outlet face 30b. The deflected airflow 51 flows along the connection surface 23, and is deflected by the deflection surface 22B in a direction from the second wall portion 20 toward the first wall portion 10.

[0036] The airflow 51 flowing from the second wall portion 20 toward the first wall portion 10 collides with the inner wall surface 10a of the first wall portion 10, and most of the airflow flows in a direction from the outlet surface 30b toward the inlet surface 30a due to swirling in the testing space 30 caused by the previous airflow (i.e., due to a pressure drop in the swirling flow). The airflow 51 then merges with or moves parallel to the jet 50, and again flows from the first wall portion 10 toward the second wall portion 20. In this way, the airflow 51 forms a circulating flow 52 swirling around the Z-axis in the testing space 30.

[0037] The subject X enters the testing space from the inlet surface 30a with the circulating flow 52 formed. FIG. 4(b) shows the state in which the subject X has entered the testing space 30. When the subject X enters the testing space 30, the subject X crosses the laminar jet 50. After crossing the jet 50, the subject X is exposed to the circulating flow 52. Due to the impact or promotion of volatilization by these air flows, the substances adhering to the subject X are separated from the subject X and merge with the air flow 51. The air flow 53 containing the adhering substances flows into the analysis section 32 via the intake path 13 and is analyzed.

[0038] The control unit 36 ​​displays the analysis result of the attached substance by the analysis unit 32 on a monitor or the like, and executes a judgment based on the concentration of the attached substance. That is, the control unit 36 ​​compares the concentration of the attached substance with a threshold value, and if the concentration exceeds the threshold value, controls the notification unit 34 to notify the surroundings by issuing an alarm or the like.

[0039] As described above, in this embodiment, the jet 50 near the inlet and the circulating flow 52 in the testing space 30 are used to separate adhering substances from the subject X. The circulating flow 52 makes it easier for the adhering substances separated from the subject X to remain in the testing space 30, and prevents the substances from diffusing outside the testing space 30. This prevents the concentration of the adhering substances from decreasing over time, improving the detection sensitivity of the adhering substances. The improved detection sensitivity also makes it possible to shorten the testing time.

[0040] Furthermore, the flow velocity of the circulating flow 52 is sufficiently smaller than the flow velocity of the jet 50 (for example, 10 m / s to 20 m / s). On the other hand, although the flow velocity of the jet 50 is greater than the flow velocity of the circulating flow 52, ​​the subject X is exposed to the jet 50 only during the period when it passes through the inlet surface 30a. Therefore, discomfort felt by the subject X due to exposure to the airflow can be suppressed.

[0041] FIG. 5 is a top view of the testing device 1 according to a modified example of this embodiment. As shown in this figure, the testing device 1 may include an auxiliary jetting unit 17 that jets gas toward the test object (e.g., subject X). The auxiliary jetting unit 17 includes a nozzle similar to that of the jetting unit 12, and jets compressed gas toward the test object for a short period of time to promote separation of adhering substances. The compressed gas from the auxiliary jetting unit 17 is jetted directly toward the test object, that is, the subject X. However, since the adhering substances are retained in the testing space 30 by the circulating flow 52, ​​the amount and flow rate of the compressed gas can be reduced compared to the case where the circulating flow 52 is not adopted. In other words, the detection sensitivity can be improved while suppressing an increase in discomfort for the subject X.

[0042] FIG. 6 is a cross-sectional view of the second wall according to a modified example of this embodiment, and FIG. 7 is a cross-sectional view of the first wall according to a modified example of this embodiment. As shown in FIG. 6(a), the pair of deflection surfaces 22, 22 may be flat surfaces parallel to the Z axis. Also, as shown in FIG. 6(b), the recess 21 may be formed by a concave surface continuing from one of the pair of edges 21a, 21a to the other. For example, in a cross section perpendicular to the Z axis, the concave surface may be a semi-ellipse whose major axis coincides with the inner wall surface 20a of the second wall 20. When the deflection surface 22 is a flat surface, it is possible to reduce the manufacturing cost while obtaining the above-mentioned circulating flow. On the other hand, when the recess is formed by a single concave surface, it is possible to deflect the circulating flow 52 with less disturbance, so that the decrease in the concentration of the adhering substance in the testing space 30 can be further suppressed. Therefore, the detection sensitivity can be further improved.

[0043] 7, a recess 18 similar to that of the second wall portion 20 may be provided on the inner wall surface 10a of the first wall portion 10. The recess 18 faces the second wall portion 20 and extends along the Z-axis. The cross-sectional shape of the recess 18 may adopt the cross-sectional shape of the recess 21. By providing the recess 18 on the first wall portion 10, it is possible to easily maintain the circulating flow 52 and suppress the diffusion of adhered substances from the testing space 30.

[0044] The present disclosure is not limited to the above-described embodiment, but is defined by the claims, and includes all modifications within the meaning and scope equivalent to the claims. [Explanation of symbols]

[0045] 1...adherent substance inspection device (inspection device), 10...first wall portion, 10a...inner wall surface, 11...collection portion, 12...ejection portion, 13...suction path, 14, 15...fan, 16...nozzle, 16a...central axis (nozzle axis), 17...auxiliary ejection portion, 18...recess, 20...second wall portion, 20a...inner wall surface, 21...recess, 21a...edge portion, 22, 22A, 22B...deflection surface, 23...connection surface, 30...inspection space, 32...analysis portion, 34...notification portion, 36...control portion, 40...passage, 41...floor surface, 50...jet, 51...airflow, 52...circulation flow, X...subject

Claims

1. a first wall portion and a second wall portion extending along a reference axis and disposed opposite each other to define an examination space for an examination object therebetween; A collection section having an intake passage communicating with the testing space; an ejection unit that ejects a layered jet, the layered jet including the gas in the testing space obtained via the collection unit and along an inlet surface of the testing space through which the test object enters, from the first wall portion toward the second wall portion; an analysis unit that analyzes the adhering substance of the test target or a specific substance derived from the adhering substance from the gas in the test space obtained through the collection unit; Equipped with the second wall portion includes a recess facing the first wall portion and extending along the reference axis; the ejection portion has a nozzle for generating the jet, The nozzle is directed toward one of a pair of edges of the recess along the reference axis that is closer to the inlet surface. Adhesion substance inspection device.

2. The recess includes the pair of edges, and a pair of deflection surfaces that become closer to each other as they move away from the first wall portion and extend along the reference axis; a connection surface that connects the pair of deflection surfaces; The adhesion substance inspection device according to claim 1 ,

3. The recessed portion is The pair of edges is constituted by a concave surface that continues from one to the other. The adhesion substance inspection device according to claim 1 .

4. The nozzle of the injection portion is formed in the first wall as a slit extending along the reference axis. The adhered substance inspection device according to any one of claims 1 to 3.

5. The first wall portion includes a recess facing the second wall portion and extending along the reference axis. The adhered substance inspection device according to any one of claims 1 to 4.

6. 6. The adhering material inspection device according to claim 1, further comprising an auxiliary jetting unit that jets gas toward the inspection target in the inspection space.

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