KR102550708B1 - Air-intake explosives detection apparatus - Google Patents

Abstract

The air-suction type explosive detection device is a main body having an inlet through which air is introduced at one end and an outlet through which air is discharged at the other end, irradiates incident light to air flowing inside the main body, and detects detection light emitted from the main body. A sensing unit for detecting an explosive by receiving light and detecting a fluorescence phenomenon from the detection light, and provided at the inlet and the outlet, respectively, to communicate with the inside of the main body to flow air, and to prevent external light from entering the inside of the main body. It is composed of a blocking structure.

Description

Air suction type explosive detection device {AIR-INTAKE EXPLOSIVES DETECTION APPARATUS}

The following description relates to an air-breathing explosive detection device.

Typical compounds used as explosives include nitroaromatic substances such as trinitrotoluene (TNT) or dinitrotoluene (DNT).

DNT (dinitrotoluene) is also present in some explosives through the synthesis or decomposition process of TNT, and the explosive detection device mainly detects TNT and DNT. However, since TNT and DNT exist as solids and have very low vapor pressure, explosives can be detected by detecting TNT and DNT vaporized from explosives and present in the air. Various methods for detecting such a chemical substance containing a nitro group have been developed. For example, methods for detecting chemical substances contained in explosives using ion mobility spectroscopy or neutron detectors are being researched and developed. In addition, there is a photoelectronic molecular chemical explosive detection device that detects state energy emitted while physically/chemically stabilized in an unstable state (excited state) when an explosive containing a nitro group is combined with a specific compound.

However, existing detection methods and detection devices have disadvantages in that detection time is relatively long and cost is high. In addition, the performance of the conventional detection method was not high because the maximum detection capability could not exceed ppb (part per billion) or more as its own noise increased in the process of amplifying the state change.

The above background art is possessed or acquired by the inventor in the process of deriving the disclosure of the present application, and cannot necessarily be said to be known art disclosed to the general public prior to the present application.

An object of the embodiments is to provide a mass air-breathing explosive detection device capable of detecting airborne explosives.

The tasks to be solved in the embodiments are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

An air-breathing explosive detection device according to an embodiment will be described.

The air-suction type explosive detection device is a main body having an inlet through which air is introduced at one end and an outlet through which air is discharged at the other end, irradiates incident light to air flowing inside the main body, and detects detection light emitted from the main body. A sensing unit for detecting an explosive by receiving light and detecting a fluorescence phenomenon from the detection light, and provided at the inlet and the outlet, respectively, to communicate with the inside of the main body to flow air, and to prevent external light from entering the inside of the main body. It is composed of a blocking structure.

According to embodiments, since explosives can be detected by air intake, the time for detecting explosives can be shortened, and explosives can be detected in a wider range and for a larger number of people.

Effects of the air-breathing explosive detection device according to the embodiment are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a schematic diagram for explaining a large-volume air-breathing explosive detection device according to an embodiment.
FIG. 2 is a schematic diagram for explaining the structure of a sensing unit in the explosive detection device of FIG. 1 .
3 is a perspective view of a structure according to one embodiment.
4 is a cross-sectional view of the structure along line IV-IV of FIG. 3 .

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes can be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included within the scope of rights.

Terms used in the examples are used only for descriptive purposes and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

Components included in one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, descriptions described in one embodiment may be applied to other embodiments, and detailed descriptions will be omitted to the extent of overlap.

Hereinafter, the air breathing explosive detection device 10 will be described with reference to FIGS. 1 to 4 .

Referring to the drawings, the air intake type explosive detection device 10 is configured to include a main body 11, a sensing unit 12 for detecting explosives, and a structure 13 for sucking and discharging air.

Here, the explosive detection device 10 detects the existence of nitro groups in the air by detecting the fluorescence phenomenon (ie, energy or color change of the detection light) generated as the sensing material is excited when irradiated with light of a specific wavelength range. A device that detects explosives.

The explosive detection device 10 detects a fluorescence phenomenon that occurs when light is irradiated into the air, and when external light is introduced, accuracy and sensitivity of detection may be deteriorated. Accordingly, the main body 11 is formed of a light blocking material capable of blocking the inflow of external light. However, in the main body 11 , the light transmitting portion 113 may be formed of a light transmissive material for emitting the detection light LO to the light receiving portion 123 .

The body 11 has a tubular shape in which an inlet 111 through which air is sucked is formed at one end and a discharge port 112 through which air is discharged at the other end, and air can flow therein.

On the other hand, the discharge port 112, or the structure 13 provided on the outside of the discharge port 112 or the discharge port 112 includes an exhaust device (not shown) including a fan that forms a flow for discharging air from the main body 11. ) may be provided. Of course, it is also possible that the exhaust device is provided on the inlet 111 side of the main body 11 .

The sensing unit 12 includes a light source 121 that irradiates incident light of a predetermined wavelength range, a path conversion unit 122 that changes the path of the incident light LI, and a light receiver 123 that receives the detection light LO. It is composed by

The light source 121 is provided inside the main body 11 and, for example, may be disposed adjacent to the outlet 112 to irradiate the incident light LI into the main body 11 . In addition, the light source 121 may radiate the incident light LI substantially parallel to the longitudinal direction of the main body 11 or the air flow direction. In addition, the light source 121 may be provided to irradiate the incident light LI in a direction opposite to the air flow direction, that is, in a direction from the outlet 112 toward the inlet 111 .

In addition, the light source 121 may be provided in a space isolated from air flow inside the main body 11 .

The light receiving unit 123 is provided outside the main body 11 . Here, the light receiving unit 123 is provided at a position that is not on a straight line with respect to the direction in which the incident light LI is irradiated, but is shifted.

Here, the term "shifted position" refers to a position excluding a position where the incident light LI emitted from the light source 121 arrives in a straight line (ie, a position where the incident light LI can be directly incident on the light receiving unit 123). means That is, the light source 121 and the light receiver 123 are not disposed on a straight line, and have a predetermined angle with respect to the traveling direction of the incident light LI and the line connecting the light source 121 and the path conversion unit 122. A light receiving unit 123 is disposed at the position. In the drawings, it is illustrated that the light source 121, the path conversion unit 122, and the light receiving unit 123 are arranged to be approximately 90°, but this is merely an example for convenience of explanation, and the position of the light receiving unit 123 is the incident light. If (LI) is not directly incident and is at a position shifted by a predetermined angle, it is not limited by the drawings and can be substantially changed in various ways.

The path converter 122 is provided between the light source 121 and the light receiver 123 to form a predetermined light path by totally reflecting and transmitting the incident light LI toward the light receiver 123 . For example, the path converting unit 122 may be formed of a prism formed by cutting a hexahedral optical lens into an oblique plane to have a quadrangular top surface and a triangular side surface.

In the path changing unit 122, the light source 121 is disposed at the rear, and the inclined surface becomes the emission surface 122a from which light passing through the path changing unit 122 is emitted. The path conversion unit 122 is disposed such that the emission surface 122a faces the inside of the main body 11 and faces the light receiving unit 123 . Here, when the incident light LI irradiated from the light source 121 is totally reflected and transmitted inside the path converting unit 122, the path conversion unit 122 changes the angle of incidence and reflection depending on the transmittance, so that the angle of the inclined plane is determined. By adjusting, the threshold value can be displayed clearly in the low energy region detected by the light receiver 123.

In addition, the path changing unit 122 is provided to be exposed to the air flow inside the main body 11, and the flowing air comes into contact with the discharge surface 122a to flow. The path changing unit 122 may form the emitting surface 122a as an inclined surface so that air can flow along the emitting surface 122a and increase a contact time between the emitting surface 122a and the air.

Here, a sensing material is provided on the emission surface 122a. For reference, the sensing material is a material that reacts with nitro groups to generate a fluorescence phenomenon, and the surface (ie, the surface exposed to the flow of air) is coated or applied with a sensing material to a predetermined thickness on the emission surface 122a. can be formed.

Accordingly, when the incident light LI passes through the emission surface 122a and is emitted as the detection light LO, the path conversion unit 122 is excited while being scattered by the sensing material, and flows along the surface of the emission surface 122a. reacts with nitro groups contained in the air to generate fluorescence. In addition, the light receiving unit 123 may detect an explosive by detecting a fluorescence phenomenon of the received detection light LO.

According to the present embodiments, the light source 121 and the light receiver 123 are not disposed on a straight line but disposed on the optical path converted by the path conversion unit 122, so that the light emitted from the light source 121 Since direct incident on the light receiving unit 123 can be prevented, detection accuracy of the sensing unit 12 can be improved. In addition, in this embodiment, since the positions of the light source 121 and the light receiver 123 are adjusted, it is not necessary to provide a separate filter (eg, a band-pass filter) to the light receiver 123. structure can be simplified.

The structures 13a and 13b are made of a light blocking material to block external light from entering through the inlet 111 and the outlet 112 .

Here, since the structures 13a and 13b provided at the inlet 111 and the discharge port 112 have substantially the same structure, hereinafter, the structure 13a provided at the inlet 111 will be referred to as “structure 13”. However, unless otherwise specified, the structure 13b provided in the outlet 112 also has the same structure.

The structure 13 includes a housing 131 , a blocking passage 135 and a connection passage 136 . In addition, the structure 13 is formed of a light blocking material to block the inflow of external light, and the inside is formed to allow air to flow.

In the housing 131, a first opening 132a communicating with the main body 11 is formed at a first end 132 on one side, and a second opening 133a communicating with the outside is formed at a second end 133 on the other side. is formed

Meanwhile, since the second opening 133a of the structure 13 is open, external light may be introduced through the second opening 133a. Here, since the light has linearity, among the external light introduced into the structure 13, external light introduced from at least a portion corresponding to the first opening 132a can reach the first opening 132a, and the main body (11) It can flow into the interior. Accordingly, a projection area obtained by linearly extending the cross-sectional area of the first opening 132a to the second opening 133a is referred to as an area in which external light can flow into the body 11, and is referred to as an "external light area R". . For reference, although indicated as “R” in the drawing, the external light region R has the cross section of the first opening 132a as a cross section and is the distance between the first opening 132a and the second opening 133a. It means a three-dimensional space with a height of .

The connection passage 136 communicates with the inside of the main body 11 through the first opening 132a and forms a passage through which air flows. In addition, the connection passage 136 is formed with a bent portion 136a to block external light from being introduced. For example, the bent portion 136a is formed at least at a portion adjacent to the first opening 132a, and the bent portion 136a on the side of the connection passage 136 so that the bent inner surface penetrates into the external light region R and overlaps the bent portion 136a. is formed In addition, the bent portion 136a is formed such that the height of the bent portion covers at least the cross-sectional height of the first opening 132a. External light introduced into the housing 131 cannot be introduced through the first opening 132a because it is blocked by the inner surface of the bent portion 136a when it proceeds to the first opening 132a.

On the other hand, in the drawing, it is illustrated that the connection passage 136 is bent in a 'c' shape in an upward direction, but this is just an example for convenience of explanation, and the connection passage 136 is a bent portion bent downward ( 136a) may be formed, or a bent portion 136a bent two or more times may be formed, and in addition, the bent portion 136a may be formed in various shapes. In addition, the connection passage 136 may have a curved inner surface of the bent portion 136a.

The blocking passage 135 is connected to the connection passage 136 and communicates with the outside through the second opening 133a.

The blocking passage 135 is formed to have a larger cross-sectional area than the cross-sectional area of the connection passage 136 so as to increase the amount of air inflow and flow. For example, the blocking passage 135 may have a shape in which a cross-sectional area gradually increases toward the second opening 133a.

By forming the shape of the blocking passage 135 as described above, the flow rate of air introduced into the main body 11 through the structure 13a can be increased in the structure 13a provided in the inlet 111 . Conversely, in the structure 13b provided at the discharge port 112, since the air discharged from the main body 11 first encounters the connection passage 136 having a small cross-sectional area, the flow rate of air is slowed down, and inside the main body 11 It can stay longer than a certain amount of time.

In addition, in the blocking passage 135 , the bent portion 135a may have a bent height greater than at least the height of the cross section of the blocking passage 135 and the height of the cross section of the connection passage 136 . In this way, by forming the bent portion 135a of the blocking passage 135 at a high bending height, it is possible to prevent the air from flowing backward due to a large change in the flow direction of the air.

The blocking passage 135 is formed with at least one bent portion 135a on the side of the blocking passage 135 to block external light introduced through the second opening 133a. In addition, the bent portion 135a overlaps the external light region R, and may be bent multiple times in a 'W' shape or zigzag shape in the Z-axis direction so as to overlap the external light region R multiple times. there is.

However, although the drawing illustrates that the blocking flow path 135 is bent in a 'W' shape or zigzag shape in the vertical direction, this is merely an example for convenience of description, and the shape of the blocking flow path 135 is an external light area. If it can be overlapped with (R) one or more times, it can be changed substantially variously. For example, the blocking passage 135 may be formed by bending the inner surface of the bent portion 135a into a curved surface.

According to this embodiment, since the structure 13 is bent multiple times so that both the blocking passage 135 and the connection passage 136 overlap with respect to the external light region R, the inflow of external light can be effectively blocked. . In addition, even if external light is reflected or scattered on the inner surface of the blocking passage 135 when it travels inside the housing 131, it is continuously blocked by the inner surface of the bent portion 135a, so that external light does not flow into the body 11. can prevent

The flow guide 134 is provided in the second opening 133a on the suction side to uniformly flow the introduced air. The flow guide 134 is formed to block the second opening 133a and is detachably formed from the housing 131 and the second opening 133a.

However, although the flow guide 134 is illustrated as having a lattice shape in the drawings, this is merely for convenience of explanation, and the shape of the flow guide 134 may have substantially various shapes capable of dividing air flow. . For example, the flow guide 134 may have a plurality of slit shapes in which a plurality of barrier ribs are formed in a vertical direction, a horizontal direction, or an oblique direction.

Meanwhile, in the case of the structure 13b provided in the outlet 112, it is installed symmetrically with the structure 13a provided in the inlet 111. That is, on the discharge port 112 side, in the structure 13b, the first opening 132a becomes the suction side and the second opening 133a becomes the discharge side. In this case, the flow guide 134 may be provided in the second opening 133a or may be omitted.

According to the present embodiments, the air-breathing explosives detection device 10 detects explosives by sucking air, so it can quickly detect explosives in a relatively large space where many people pass or gather. In addition, since the structure 13 is provided at the inlet 111 and the outlet 112 of the air-breathing explosives detection device 10 of the main body 11, it is possible to effectively block external light from entering, thereby improving detection accuracy and sensitivity. can

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

10: Explosive detection device
11: body
111: inlet
112: discharge port
113: light transmission part
12: sensing unit
121: light source
122: path conversion unit
122a: emission surface
123: light receiving unit
13, 13a, 13b: structure
131 housing
132 first stage
132a: first opening
133 second stage
133a: second opening
134: flow guide
135: blocking euro
135a: bent portion
136: connection flow
136a: bent portion
LI: incident light
LO: detection light
R: outside light area

Claims (16)

a main body having an inlet through which air is introduced at one end and an outlet through which air is discharged at the other end;
a sensing unit irradiating incident light to air flowing inside the main body, receiving detection light emitted from the main body, and detecting a fluorescence phenomenon from the detection light, thereby detecting an explosive; and
a structure provided at each of the inlet and the outlet to communicate with the inside of the main body to flow air and to block external light from entering the inside of the main body;
including,
The housing of the structure,
A connection passage communicating with a first opening on one side coupled to the main body and having a bent portion formed by being bent at least once so as to overlap an external light region through which external light can flow into the structure;
A blocking passage communicating with the connection passage but communicating with the second opening on the other side, having a cross-sectional area gradually increasing toward the second opening, and bending a plurality of times to overlap with respect to the external light region to form a bent portion is formed, ,
The air-breathing explosive detection device in which the bent portion of the blocking passage is formed to have a bent height greater than the height of the cross section of the blocking passage to prevent a reverse flow of air flow in the blocking passage.
According to claim 1,
The air-breathing explosives detection device in which the blocking passage is formed with a greater bending height than the height of the cross-sectional area of the connection passage.
delete According to claim 1,
The air-breathing explosive detection device of claim 1 , wherein at least a portion of the connection passage adjacent to the first opening is bent so as to overlap with respect to the external light region.
According to claim 2,
Air-breathing explosives detection device in which the cross-sectional area of the blocking passage is formed larger than the cross-sectional area of the connecting passage.
delete According to claim 2,
The air-breathing explosives detection device of claim 1 , wherein the blocking passage is formed with a plurality of bent portions in a W-shape or zigzag shape so as to overlap the external light region a plurality of times.
delete According to claim 2,
The structure further comprises a flow guide for guiding the air flow,
The flow guide is an air-breathing explosives detection device provided in the second opening.
According to claim 9,
The flow guide is formed in the form of a bulkhead or grid or slit that divides the cross-sectional area of the second opening into a plurality of air-breathing explosives detection device.
According to claim 9,
The flow guide is detachably formed in the housing air suction type explosive detection device.
According to claim 1,
The sensing unit,
a light source provided inside the main body and radiating incident light into the main body;
a light receiving unit provided outside the main body, provided at a position displaced from a path in which the incident light is directly incident, and receiving detection light emitted from the main body; and
a path converting unit provided between the light source and the light receiving unit, and converting a path of the incident light into the light receiving unit;
An air-breathing explosive detection device comprising a.
According to claim 12,
Wherein the path conversion unit has a sensing material provided on an emitting surface from which the detection light is emitted towards the light receiving unit.
According to claim 13,
The path conversion unit has a prism shape formed by cutting an optical lens of a hexahedron into an oblique surface, and the oblique surface is arranged to be the emission surface.
According to claim 13,
The discharge surface is provided to be exposed to air flowing inside the body,
The light source is an air-breathing explosives detection device provided behind the path changing unit.
According to claim 13,
The main body is formed of a light-blocking material that blocks external light from entering, and a light-transmitting portion formed of a light-transmitting material so as to transmit the fluorescence at a position corresponding to the light-receiving portion is formed.

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