KR20210150102A - Light sensing device having filter structure and explosives detection system including the same - Google Patents

Abstract

A light sensing device includes: a light source unit; a first filter; a first mounting unit; a second filter; a third filter; and a light reception unit. The light source unit emits first light having a first wavelength range. The first filter filters the first light so as to output second light having a first wavelength in the first wavelength range. The first mounting unit includes a light-emitting material for emitting, in response to the second light, third light having a second wavelength range that differs from the first wavelength range. The second filter filters the third light on the basis of a first reference wavelength so as to output fourth light having a third wavelength range, which is longer than or the same as the first reference wavelength in the second wavelength range. The third filter filters the fourth light on the basis of a second reference wavelength that differs from the first reference wavelength, so as to output fifth light having a fourth wavelength range, which is shorter than or the same as the second reference wavelength in the third wavelength range. The light reception unit receives the fifth light. Whether explosive particles are present in the air is detected in response to the fourth wavelength range of the fifth light. According to the present invention, the explosive particles can be effectively detected.

Description

FILTER STRUCTURE AND EXPLOSIVES DETECTION SYSTEM INCLUDING THE SAME

The present invention relates to explosive detection, and more particularly, to an optical sensing device for detecting explosives, and an explosive detection system including the optical sensing device.

Representative compounds used as explosives include nitroaromatic chemicals such as trinitrotoluene (TNT) and dinitrotoluene (DNT), and various methods for detecting such chemicals have been developed and have. Methods for detecting chemicals in explosives using ion mobility spectroscopy or neutron detectors are being researched and developed, but compared to biosensors, the detection time is relatively long and expensive. . Recently, many sensors have been developed that use changes in the absorption or fluorescence of nanoparticles. It is possible to implement a simple measurement device and has a high possibility of application as a real-time explosive sensor due to its short reaction time.

On the other hand, if you look at the synthesis process of TNT or the decomposition process of TNT, it can be seen that DNT is also present in some explosives. Therefore, TNT and DNT are representative chemicals present in explosives, and the explosive detection device (sensor) mainly functions to detect these two substances. However, since TNT and DNT exist as a solid and their vapor pressure is very low, the development of a receptor with high sensitivity and selectivity and a stable structure in the gas phase to detect TNT and DNT present in the air while vaporizing in a solid explosive state is difficult. It can be the core of the development of explosive detection sensors.

Recently, while research on TNT and receptors capable of selectively binding to DNT with high sensitivity is steadily progressing, a detection device capable of effectively detecting it using the same is still insufficient.

It is an object of the present invention to provide a light sensing device capable of improving explosive detection performance by including a filter structure.

Another object of the present invention is to provide an explosive detection system capable of improving explosive detection performance by including the optical sensing device.

In order to achieve the above object, an optical sensing device according to embodiments of the present invention includes a light source unit, a first filter, a first seating unit, a second filter, a third filter, and a light receiving unit. The light source unit irradiates a first light in a first wavelength range. The first filter filters the first light to output the second light having a first wavelength within the first wavelength range. The first mounting portion includes a light emitting material that emits a third light having a second wavelength range different from the first wavelength range in response to the second light. The second filter filters the third light based on the first reference wavelength to output the fourth light in a third wavelength range that is longer than or equal to the first reference wavelength in the second wavelength range. The third filter filters the fourth light based on a second reference wavelength different from the first reference wavelength to receive a fifth light in a fourth wavelength range shorter than or equal to the second reference wavelength in the third wavelength range. print out The light receiving unit receives the fifth light. Detect the presence of explosive particles in the air in response to a fourth wavelength range of the fifth light.

In an embodiment, a lens disposed between the light source unit and the first filter and collimating the first light may be further included.

In an embodiment, the light source unit and the light receiving unit may be disposed such that the center of the light source unit and the center of the light receiving unit are positioned on a straight line.

In one embodiment, when the explosive particles are seated in the first seating portion, the second wavelength range is changed and the intensity of the fifth light is changed in the fourth wavelength range, and the intensity of the fifth light is changed In response, the presence of the explosive particles in the air may be detected.

In an embodiment, it is disposed between the first filter and the first seating part, and transmits the second light so that the second light is provided to the first seating part, and the third light is transmitted through the first filter. The third light may further include a first mirror for reflecting so as not to be provided to the .

In an embodiment, a second seating part disposed between the first seating part and the second filter and including the light emitting material emitting the third light in response to the second light may be further included.

In an embodiment, the display device may further include a beam splitter disposed between the first filter and the first seating part and refracting the second light so that the second light is provided to the first seating part.

In an embodiment, the light source unit and the first filter are disposed on a first side of the beam splitter, and the first seating part is disposed on a second side different from the first side of the beam splitter, the second filter; The third filter and the light receiving unit may be disposed on a third side opposite to the second side of the beam splitter and different from the first side of the beam splitter.

In an embodiment, the third light may pass through the beam splitter and be provided to the second filter.

In order to achieve the above another object, an explosive detection system according to embodiments of the present invention includes a suction nozzle, a discharge nozzle, a light sensing device, a first guide tube, a suction force generator, a second guide tube, and a controller. At one end of the suction nozzle, an inlet through which air containing explosive particles is introduced is formed. The discharge nozzle is formed with a discharge port through which the air is discharged at one end. The light sensing device generates a detection signal by detecting the explosive particles in the air using light. The first guide tube is connected to the other end of the suction nozzle, and guides the air introduced through the suction nozzle to the optical sensing device. The suction force generating unit is formed at the other end of the discharge nozzle, is connected to the discharge nozzle, and provides a suction force for sucking air in the optical sensing device and discharging it to the discharge port while allowing the air to be sucked through the suction port. The second guide tube is formed between the optical sensing device and the suction force generating unit to discharge the air introduced into the optical sensing device by the suction force generated by the suction force generating unit to the outlet of the discharge nozzle. The controller determines whether the explosive particles are present in the air using the detection signal. The light sensing device includes a light source unit, a first filter, a first seating unit, a second filter, a third filter, and a light receiving unit. The light source unit irradiates a first light in a first wavelength range. The first filter filters the first light to output the second light having a first wavelength within the first wavelength range. The first mounting portion includes a light emitting material that emits a third light having a second wavelength range different from the first wavelength range in response to the second light. The second filter filters the third light based on the first reference wavelength to output the fourth light in a third wavelength range that is longer than or equal to the first reference wavelength in the second wavelength range. The third filter filters the fourth light based on a second reference wavelength different from the first reference wavelength to receive a fifth light in a fourth wavelength range shorter than or equal to the second reference wavelength in the third wavelength range. print out The light receiving unit receives the fifth light. Detect the presence of explosive particles in the air in response to a fourth wavelength range of the fifth light.

In the light sensing device and the explosive detection system including the same according to the embodiments of the present invention as described above, by using a light emitting material in which at least one of the intensity and wavelength of light emitted when the explosive particles are seated is used, explosive particles can be effectively detected.

In addition, in order to increase the luminous efficiency of the light-emitting material, the light source and the light-receiving unit are arranged in a straight line, collimating the light using a lens to effectively block the light source, applying a multi-layered filter structure, and optically amplifying the light emission A light emitting material may be added or a mirror structure may be added. Alternatively, the arrangement of the light source unit and the light receiving unit may be changed so that blocking of the light source is unnecessary. Accordingly, it is possible to improve the detection accuracy of explosive particles.

1 is a block diagram illustrating an explosive detection system according to embodiments of the present invention.
2 is a block diagram illustrating an optical sensing device according to embodiments of the present invention.
3 is a block diagram illustrating an optical sensing device according to embodiments of the present invention.

With respect to the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention may be embodied in various forms and the text It should not be construed as being limited to the embodiments described in .

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

When an element is referred to as being “connected” or “connected” to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle. Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate that the described feature, number, step, operation, component, part, or a combination thereof exists, but one or more other features or numbers , it is to be understood that it does not preclude the possibility of the existence or addition of steps, operations, components, parts, or combinations thereof.

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

On the other hand, when a certain embodiment can be implemented differently, functions or operations specified in a specific block may occur in a different order from that specified in the flowchart. For example, two consecutive blocks may be performed substantially simultaneously, or the blocks may be performed in reverse according to a related function or operation.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

1 is a block diagram illustrating an explosive detection system according to embodiments of the present invention.

Referring to FIG. 1 , the explosive detection system includes a suction nozzle 100 , a first guide tube 106 , a second guide tube 110 , a suction force generator 114 , a discharge nozzle 116 , a controller 130 and and a light sensing device 200 . The explosive detection system includes a speed sensor 102 , a temperature and humidity sensor 104 , a connection nozzle 112 , a first connection pipe 118 , a second connection pipe 120 , a power supply unit 140 , and a first light blocking unit. 150 and the second light blocking unit 160 may be further included.

The suction nozzle 100 is formed with a suction port 10 through which air containing explosive particles is introduced at one end. A first guide tube 106 may be connected to the other end of the suction nozzle 100 .

The discharge nozzle 116 is formed with a discharge port 20 through which the air is discharged at one end. A suction force generating unit 114 may be connected to the other end of the discharge nozzle 116 .

The suction nozzle 100 sucks the air by the suction force generated by the suction force generating unit 114 installed on the discharge nozzle 116 . For example, a fan may be used to generate the suction force. The air sucked in this way may be discharged to the first guide pipe 106 connected to the other end of the suction nozzle 100 .

The first guide tube 106 may have one end connected to the suction nozzle 100 and the other end connected to one side of the first connector tube 118 connected to the light sensing device 200 of the sensor unit 108 . .

In one embodiment, the diameter of the other end of the first guide tube 106 may be formed smaller than the diameter of the one end. The air introduced through this may be accelerated through the first guide tube 106 and introduced into the optical sensing device 200 through the first connection tube 118 .

In an embodiment, the first guide tube 106 may be arranged in a zigzag shape to have a width greater than the height of the light sensing device 200 and connected to the first connector tube 118 . Through the structure of the first guide tube 106 , the light introduced from the outside by the first guide tube 106 may be blocked from flowing into the light sensing device 200 .

The first light blocking unit 150 may be disposed between the suction nozzle 100 and the light sensing device 200 and block light entering from the outside. For example, the first guide tube 106 is formed to pass through the first light blocking part 150 and may have a zigzag shape. The first guide tube 106 having a zigzag shape can prevent the air introduced into the light sensing device 200 from going out toward the suction nozzle 100 and also prevent the air introduced into the first guide tube 106 from being discharged. It can be compressed to remove moisture from the air.

The light sensing device 200 detects the explosive particles in the air using light and generates a detection signal. One side of the optical sensing device 200 may be connected to the first connector 118 , and the other end may be connected to the second connector 120 . A detailed structure and operation of the optical sensing device 200 will be described later in detail with reference to FIG. 2 and the like.

One end of the second connector 120 may be connected to the optical sensing device 200 , and the other end may be connected to the second guide tube 110 .

The second guide tube 110 may have one end connected to the second connecting tube 120 and the other end connected to the end of the connecting nozzle 112 connected to the suction force generating unit 114 .

Through this structure, the air introduced into the optical sensing device 200 by the suction force generated by the suction force generating unit 114 is connected to the nozzle 112 through the second connection pipe 120 and the second guide pipe 110 . ), and the air guided to the connection nozzle 112 may be discharged to the outside through the outlet 20 formed at the end of the discharge nozzle 116 .

In one embodiment, the diameter of one side of the second guide tube 110 , that is, the portion connected to the second connection tube 120 may be formed smaller than the diameter of the other side, that is, the portion connected to the connection nozzle 112 . . Accordingly, the air introduced into the optical sensing device 200 may be discharged through the outlet 20 as the flow rate is slowed.

In an embodiment, the second guide tube 110 may be arranged in a zigzag shape to have a width greater than the height of the light sensing device 200 to be connected to the second connector 120 . Through the structure of the second guide tube 110 , it is possible to block light introduced from the outside by the second guide tube 110 from flowing into the light sensing device 200 .

The second light blocking unit 160 may be disposed between the light sensing device 200 and the suction force generating unit 114 , and may block external light introduced through the suction force generating unit 114 and the outlet 20 . In this case, the second guide tube 110 is formed to pass through the second light blocking part 160 and may have a zigzag shape.

The suction force generating unit 114 may operate under the control of the controller 130 to generate the suction force so that the air is sucked through the suction port 10 . For example, the suction force generating unit 114 may include a fan.

A speed sensor 102 for measuring the speed of the air and a temperature and humidity sensor 104 for measuring the temperature and humidity of the air may be installed on the suction nozzle 100 . The speed measurement signal sensed by the speed sensor 102 and the temperature and humidity measurement signal sensed by the temperature and humidity sensor 104 may be input to the controller 130 .

The power supply unit 140 may supply power to the suction force generating unit 114 , the controller 130 , the light sensing device 200 , and the like. For example, the power supply unit 140 may include at least one battery.

The controller 130 determines whether the explosive particles are present in the air using the detection signal generated by the light sensing device 200 . The controller 130 is a central processing unit for controlling the overall functions of the explosive detection system, and may control the operating states of the light sensing device 200 and the suction force generator 114 . This will be described in detail as follows.

First, the controller 130 may control the suction force of the air introduced through the suction force generating unit 114 and the suction port 10 based on a signal measured from the speed sensor 102 . Specifically, the controller 130 acquires the flow velocity information of the air introduced through the inlet 10 based on the velocity measurement signal sensed by the velocity sensor 102 , and then sets the acquired flow velocity to a preset threshold value. In the following case, the suction force generated by the suction force generating unit 114 may be increased. For example, when the suction force generating unit 114 includes a fan, the suction force may be increased by increasing the operating speed of the fan.

In addition, the controller 130 acquires the humidity information in the air based on the temperature and humidity measurement signal sensed by the temperature and humidity sensor 104, and based on the acquired humidity information, the suction force generating unit 114 It is possible to control the suction force generated by the Specifically, when the humidity of the air flowing into the suction nozzle 100 through the suction port 10 is greater than or equal to a preset threshold value, the controller 130 controls the suction force generating unit 114 to lower the flow rate of the air. can For example, when the suction force generating unit 114 includes a fan, the suction force may be reduced by decreasing the operating speed of the fan.

Meanwhile, although not shown, the explosive detection system includes various components, for example, a GPS for acquiring location information, a communication module for accessing a WIFI network, various types of operating systems (eg, Android, etc.) and applications memory and processor for storing and driving, a display for displaying state information, detection result information, control information, etc. of the explosive detection system, main board, camera for taking external images, distance sensor, recognizing specific RFID It may further include an antenna for receiving an RFID key for the purpose, a status check unit capable of controlling a plurality of LED elements and buttons for displaying the state of the explosives detection system, a fan control unit for controlling the operation of the fan, and the like.

The operation of the explosive detection system according to the above-described embodiments of the present invention will be described as follows.

First, the controller 130 may control the suction force generating unit 114 to generate a predetermined suction force.

The suction force generated in this way is the connection nozzle 112 , the second guide tube 110 , the second connection tube 120 , the light sensing device 200 , the first connection tube 118 , and the first guide tube 106 ). It is provided to the suction nozzle 100 through the suction nozzle 100 , and the suction nozzle 100 sucks air containing explosive particles through the suction port 10 according to the suction force and introduces it into the first guide pipe 106 .

The first guide pipe 106 provides the introduced air to the first connecting pipe 118 , and in this case, the air introduced through the suction nozzle 100 may be compressed to some extent due to the zigzag shape. The air introduced into the first guide tube 106 through this compression has an increased flow rate by the outlet having a smaller diameter than the inlet of the first guide tube 106 after the moisture is removed to some extent, so that the first connecting tube 118 may be emitted to the light sensing device 200 through the

The air introduced into the light sensing device 200 stays to some extent due to the shape of the second guide tube 110 . Specifically, since the flow velocity of the air flowing into the second guide tube 110 is reduced by the zigzag shape of the second guide tube 110 and the narrow inlet of the second guide tube 110 , the light sensing device 200 . After staying for a certain amount of time, the air introduced therein slowly flows into the connection nozzle 112 through the second guide tube 110 connected to the second connection tube 120 , and the discharge port 20 of the discharge nozzle 116 . can be discharged to the outside.

On the other hand, explosive particles in the air introduced into the light sensing device 200 are detected by the light sensing device 200, which will be described later.

2 is a block diagram illustrating an optical sensing device according to embodiments of the present invention. 3A, 3B, 3C, 3D, and 3E are diagrams for explaining an operation of an optical sensing device according to embodiments of the present invention.

2, 3a, 3b, 3c, 3d and 3e, the light sensing device 200 includes a light source unit 210, a first filter 230, a first seating unit 240, a second filter 250, It includes a third filter 260 and a light receiving unit 270 . The light sensing device 200 may further include a third connector 201 , a light source supply module 212 , a lens 220 , a light source measurement module 272 , and a light source control and signal processing module 280 . .

The third connector 201 may connect the first connector 118 and the second connector 120 . The air introduced into the optical sensing device 200 through the first connection pipe 118 may be discharged through the second connection pipe 120 after staying in the third connection pipe 201 for a certain amount of time.

In one embodiment, as shown in FIG. 2 , the diameter of the third connector pipe 201 may be smaller than the diameters of the first connector pipe 118 and the second connector pipe 120 . In another embodiment, although not shown, the diameter of the third connector pipe 201 may be larger than the diameters of the first connector pipe 118 and the second connector pipe 120 .

The light source unit 210 irradiates the first light LS1 in the first wavelength range WR1 . As illustrated in FIG. 3A , the first wavelength range WR1 of the first light LS1 may indicate a range from the wavelength WL11 to the wavelength WL12 . For example, the light source unit 210 may include a light emitting diode that emits the first light LS1 . For example, the first light LS1 may be ultraviolet light.

The light source supply module 212 is connected to the light source unit 210 and controls on/off of the light source unit 210 and the intensity of the first light LS1 irradiated from the light source unit 210 in response to the light source control signal CS. can do.

The lens 220 may be disposed between the light source unit 210 and the first filter 230 and may collimate the first light LS1 . In other words, the lens 220 may function to collect the first light LS1 irradiated by the light source unit 210 to the first filter 230 and the first seating unit 240 . Even if it passes through the lens 220 , the wavelength and intensity of the first light LS1 may be maintained without being changed.

The first filter 230 filters the first light LS1 to output the second light LS2 having the first wavelength WLC within the first wavelength range WR1 . As illustrated in FIG. 3A , the first wavelength WLC may be one wavelength included in the range from the wavelength WL11 to the wavelength WL12. As illustrated in FIG. 3B , the second light LS2 may have only one specific wavelength (eg, the first wavelength WLC) rather than a specific wavelength range. In other words, the first filter 230 may perform specific wavelength pass filtering.

3A and 3B show that the first wavelength WLC is the center wavelength of the first wavelength range WR1, but the present invention is not limited thereto, and the first wavelength WLC is within the first wavelength range WR1. It can be any one wavelength.

The first mounting part 240 includes a light emitting material that emits the third light LS3 of a second wavelength range WR2 different from the first wavelength range WR1 in response to the second light LS2 . As illustrated in FIG. 3C , the second wavelength range WR2 of the third light LS3 may indicate a range from the wavelength WL21 to the wavelength WL22 . The wavelengths WL21, WL22, and WLC' of FIG. 3C may be different from the wavelengths WL11, WL12, and WLC of FIG. 3A. In other words, the wavelength of light may be changed by the light emitting material.

The first seating part 240 may be disposed in the third connection pipe 201 . For example, the first seating part 240 is a quartz crystal made of a detection material that can be combined with explosive particles, for example, a nitroaromatic explosive material (particles) to cause a change in fluorescence, for example, a change in luminescence and extinction state. Quartz) may be included.

In one embodiment, the light-emitting material or the detection material is 1,1-disubstituted 4,5,8,9-bis(trypticine) represented by the following [Formula 1] that can react with nitroaromatic explosive particles ) may include an organic semiconductor compound consisting of a metalla fluorene compound.

[Formula 1]

In the above [Formula 1], M is Si or Ge, R1 and R2 are H, C1~ C18 alkyl group, C2~ C18 alkenyl group, C2~ C18 alkynyl group, C5~ C14 substituted group or aromatic ring A compound, a heteroatom (-NH-, -S-, -O-) is selected from a C3~ C10 substituted group or aromatic ring compound or a halogen atom, wherein the substituents of R1 and R2 may be the same or not. can

In one embodiment, a predetermined adhesive coating material may be coated on the upper portion of the first seating part 240 to allow explosive particles in the air flowing in the third connection pipe 201 to be easily adhered.

Although only one mounting part 240 is illustrated in FIG. 2 , as will be described later with reference to FIG. 4 , the optical sensing device 200 may include two or more mounting parts, and in particular, having different lengths (eg, , the height of which is sequentially lowered) may include a plurality of seating parts.

The second filter 250 filters the third light LS3 based on the first reference wavelength WREF1 to be longer than or equal to the first reference wavelength WREF1 in the second wavelength range WR2. ) of the fourth light LS4 is output. As illustrated in FIG. 3D , the third wavelength range WR3 of the fourth light LS4 may indicate a range from the first reference wavelength WREF1 to the wavelength WL22 . In other words, the second filter 250 may perform short-wavelength cut-off filtering that does not pass a wavelength shorter than the first reference wavelength WREF1 .

The third filter 260 filters the fourth light LS4 based on a second reference wavelength WREF2 that is different from the first reference wavelength WREF1 to obtain a second reference wavelength WREF2 in the third wavelength range WR3 . The fifth light LS5 having a shorter or equal fourth wavelength range WR4 is output. As illustrated in FIG. 3E , the fourth wavelength range WR4 of the fifth light LS5 may indicate a range from the first reference wavelength WREF1 to the second reference wavelength WREF2 . In other words, the third filter 260 may perform long-wavelength cutoff filtering that does not pass a wavelength longer than the second reference wavelength WREF2 .

The light receiving unit 270 receives the fifth light LS5 . For example, the light receiving unit 270 may include a photodiode that receives the fifth light LS5 .

The light source measuring module 272 may be connected to the light receiving unit 270 and may generate a light sensing signal SS in response to the fifth light LS5 .

The light source control and signal processing module 280 generates a light source control signal CS to control the operations of the light source supply module 212 and the light source unit 210, and explosive particles in the air in response to the light sensing signal SS A detection signal DS for detecting the presence may be generated. According to an embodiment, the light source control and signal processing module 280 and the controller 130 may be integrated into a single module, and the light source control and signal processing module 280 and the controller 130 are two separate modules. may be implemented with

Although not shown, the light sensing apparatus 200 may further include a shutter for blocking the incident of light, and a shutter sensor for sensing an operation state of the shutter.

In an embodiment, the light source unit 210 , the lens 220 , the first filter 230 , the first seating unit 240 , the second filter 250 , the third filter 260 , and the light receiving unit 270 are all It may be arranged on a straight line. For example, the center of the light source unit 210 , the center of the lens 220 , the center of the first filter 230 , the center of the first seating unit 240 , the center of the second filter 250 , and the third filter ( The center of the 260 and the center of the light receiving unit 270 may be arranged to be positioned on a straight line.

In an embodiment, the light sensing device 200 may detect whether explosive particles are present in the air in response to at least one of a wavelength range and an intensity of the fifth light LS5 received by the light receiving unit 270 . For example, when the explosive particles are deposited on the first mounting unit 240 , the second wavelength range WR2 of the third light LS3 is changed and accordingly, the fourth wavelength range of the fifth light LS5 is changed. WR4 is changed or the intensity of the fifth light LS5 is changed in the fourth wavelength range WR4, and in response to the change in the intensity of the fifth light LS5, it is possible to detect the presence of the explosive particles in the air. can

In the light sensing device 200 according to embodiments of the present invention, the light source unit 210 and the light receiving unit 270 are aligned in a straight line to increase the luminous efficiency of the light emitting material or the detection material included in the first mounting unit 240 . placed on In this structure, in order to effectively block the light source, that is, to effectively block the first light LS1 generated from the light source unit 210 from being incident on the light receiving unit 270 , the lens 220 is used to effectively block the first light LS1 . ) is collimated and a multi-layered filter structure including a plurality of filters 230 , 250 , 260 is applied.

A process for detecting explosive particles by the light sensing device 200 according to the above-described embodiments of the present invention will be described below.

First, in a state in which air does not flow into the optical sensing device 200 or in a state in which air not containing explosive particles is introduced into the optical sensing device 200 , the first seating part 240 is formed by the first filter 230 . The third light LS3 is emitted in response to the second light LS2 that has passed through , and the third light LS3 passes through the second and third filters 250 and 260 and passes through the fifth light LS5 . is output as

In this case, the light receiving unit 270 receives the fifth light LS5 according to the light emission of the first seating unit 240 , and the light source measuring module 272 generates a corresponding light sensing signal SS, and the light source The control and signal processing module 280 generates and outputs a detection signal DS indicating that explosive particles are not present in response to the light sensing signal SS.

Thereafter, when the air containing the explosive particles flows into the light sensing device 200 , the explosive particles are seated on a predetermined portion of the first seating part 240 . Accordingly, at least one of the intensity and wavelength of the third light LS3 emitted from the first seating unit 240 is changed by the second light LS2 that has passed through the first filter 230 , and the second and At least one of an intensity and a wavelength of the fifth light LS5 passing through the third filters 250 and 260 is also changed.

The light receiving unit 270 receives the fifth light LS5 of which at least one of intensity and wavelength is changed, and the light source measuring module 272 generates a light sensing signal SS corresponding thereto, and a light source control and signal processing module ( 280 generates and outputs a detection signal DS indicating the presence of explosive particles in response to the light sensing signal SS.

4 and 5 are block diagrams illustrating an optical sensing device according to embodiments of the present invention. Hereinafter, descriptions overlapping those of FIG. 2 will be omitted.

Referring to FIG. 4 , the light sensing device 200a includes a light source unit 210 , a first filter 230 , a first seating unit 240 , a second filter 250a , a third filter 260 , and a light receiving unit 270 . ), including a third connector 201 , a light source supply module 212 , a lens 220 , a first mirror 235 , a second seating part 245 , a light source measurement module 272 , and a light source control and a signal processing module 280 .

The light sensing device 200a of FIG. 4 is the light sensing device of FIG. 2 , except that it further includes the first mirror 235 and the second seating part 245 and the operation of the second filter 250a is partially changed. (200) may be substantially the same.

The first mirror 235 is disposed between the first filter 230 and the first mounting unit 240 , and the second light LS2 is provided to the first mounting unit 240 and the second mounting unit 245 . The second light LS2 may be transmitted as much as possible, and the third light LS3 may be reflected so that the third light LS3 is not provided to the first filter 230 . Even if it passes through the first mirror 235 , the wavelength and intensity of the second light LS2 may remain unchanged.

The second mounting unit 245 is disposed between the first mounting unit 240 and the second filter 250a and includes the light emitting material that emits the third light LS3 in response to the second light LS2. can do. Although not shown, the third light LS3 generated by the second mounting part 245 may also be reflected by the first mirror 235 .

Similar to the second filter 250 of FIG. 2 , the second filter 250a filters the third light LS3 to output the fourth light LS4 . Also, the second filter 250a is provided directly to the second filter 250a without reaching the first and second mounting portions 240 and 245 among the second light LS2 output from the first filter 230 . By reflecting the second light LS2 , optical amplification may be performed in the first and second mounting portions 240 and 245 .

In other words, the second filter 250 of FIG. 2 simply functions as a band filter that filters the third light LS3 and outputs the fourth light LS4, but the second filter 250a of FIG. 4 The above-mentioned role of the band filter and the role of the reflection filter reflecting the second light LS2 may be performed together. The first filter 230 and the third filter 260 may only serve as a simple band filter in FIGS. 2 and 4 .

In an embodiment, the light source unit 210 , the lens 220 , the first filter 230 , the first mirror 235 , the first mounting unit 240 , the second mounting unit 245 , and the second filter 250a ), the third filter 260 and the light receiving unit 270 may all be arranged on a straight line. For example, the center of the light source unit 210 , the center of the lens 220 , the center of the first filter 230 , the center of the first mirror 235 , the center of the first mounting unit 240 , and the second mounting unit The center of 245 , the center of the second filter 250a , the center of the third filter 260 , and the center of the light receiving unit 270 may be disposed on a straight line.

In the light sensing device 200a according to embodiments of the present invention, the light source unit 210 and the light receiving unit 270 are arranged in a straight line to increase luminous efficiency, and the lens 220 and a multi-layered filter to effectively block the light source apply the structure. In addition, in order to optically amplify the light emission of the light emitting material or the detection material, the light source unit 210 and the light receiving unit 270 are arranged in a straight line, and the mounting units 240 and 245 are additionally arranged in two stages (that is, , a light-emitting material is additionally disposed in two or two layers), and a mirror structure including a first mirror 235 is additionally applied.

Referring to FIG. 5 , the light sensing device 200b includes a light source unit 210 , a first filter 230 , a first seating unit 240 , a second filter 250 , a third filter 260 , and a light receiving unit 270 . ), including a third connector 201 , a light source supply module 212 , a beam splitter 215 , a lens 220 , a light source measurement module 272 , and extinction modules 273 and 274 ) , and a light source control and signal processing module 280 may be further included.

It further includes a beam splitter 215 and quenching modules 273 and 274 , and accordingly, a light source unit 210 , a lens 220 , a first filter 230 , a first seating unit 240 , and a second filter 250 . ), the third filter 260 and the arrangement of the light receiving unit 270 are changed, and the optical sensing device 200b of FIG. 5 may be substantially the same as the optical sensing device 200 of FIG. 2 .

The beam splitter 215 is disposed between the first filter 230 and the first mounting unit 240 , and refracts the second light LS2 so that the second light LS2 is provided to the first mounting unit 240 . can do it Even if it passes through the beam splitter 215 , the wavelength and intensity of the second light LS2 may remain unchanged. In FIG. 5 , the second light LS2 is refracted by about 90 degrees by the beam splitter 215 , but the refraction angle of the second light LS2 may not be limited thereto.

As the beam splitter 215 is added, the light source unit 210 , the lens 220 , the first filter 230 , the first seating unit 240 , the second filter 250 , the third filter 260 , and the light receiving unit The arrangement of 270 may be changed. For example, the light source unit 210 , the lens 220 , and the first filter 230 may be disposed on the first side (eg, the left side) of the beam splitter 215 . The first seating part 240 may be disposed on a second side (eg, a lower side) of the beam splitter 215 that is different from the first side. The second filter 250 , the third filter 260 , and the light receiving unit 270 are disposed on a third side (eg, upper side) different from the first side of the beam splitter 215 and opposite to the second side. can be In other words, in the embodiment of FIG. 5 , the light source unit 210 , the lens 220 , the first filter 230 , the first seating unit 240 , the second filter 250 , the third filter 260 and the light receiving unit 270 may not be arranged on a straight line.

In an embodiment, the third light LS3 generated from the first mounting unit 240 may pass through the beam splitter 215 and be provided to the second filter 250 . In other words, the beam splitter 215 refracts the light incident from the first side (eg, the second light LS2), but refracts the light incident from the second side (eg, the third light ( LS3)) can pass through without refraction.

The quenching module 273 is disposed on a fourth side (eg, the right side) different from the first, second, and third sides of the beam splitter 215 , and the quenching module 274 includes the first mounting part 240 . ) can be placed at the bottom of the The quenching module 273 may cause the light passing through the beam splitter 215 to be quenched in the light propagation direction by using an appropriate reflection angle so that the light does not enter the beam splitter 215 again. The quenching module 274 may allow the light generated from the first mounting unit 240 to be provided to the second filter 250 . For example, the quenching modules 273 and 274 may have a conical structure.

In the light sensing device 200b according to embodiments of the present invention, the light source unit 210 and the light receiving unit 270 are not arranged in a straight line, and accordingly, blocking of the light source may be unnecessary.

Although not shown, the light sensing device 200b is disposed at the lower end of the first mounting unit 240 and may further include a mounting unit similar to the second mounting unit 245 of FIG. 4 , and the first mounting unit 240 . It may further include a mirror disposed at the lower end of the light LS to reflect the third light LS and provide it to the second filter 250 .

Embodiments of the present invention may be usefully used in an explosives detection system and various electronic devices and systems that operate in conjunction therewith. For example, embodiments of the present invention include a mobile phone, a smart phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), A portable multimedia player (PMP), a digital camera, a portable game console, a navigation device, a wearable device, an internet of things (IoT) device, It may be usefully used in connection with various electronic devices such as an Internet of Everything (IoE) device, a virtual reality (VR) device, and an augmented reality (AR) device.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. you will understand that you can

Claims (7)

a light source unit irradiating a first light having a first wavelength range;
a first filter for filtering the first light and outputting a filtered second light having one specific wavelength included in the first wavelength range;
a first mounting part including a light emitting material that emits a third light having a second wavelength range different from the first wavelength range in response to the second light;
Filtering the third light based on a first reference wavelength for performing short-wavelength cutoff filtering, the filtered fourth light included in the second wavelength range and having a third wavelength range longer than or equal to the first reference wavelength a second filter to output;
Filtering the fourth light based on a second reference wavelength different from the first reference wavelength and for performing long wavelength cutoff filtering, a fourth wavelength range included in the third wavelength range and shorter than or equal to the second reference wavelength a third filter for outputting a filtered fifth light having a; and
and a light receiving unit for receiving the fifth light;
detecting the presence of explosive particles in the air in response to the fourth wavelength range of the fifth light;
It is disposed between the first filter and the first seating part, and transmits the second light so that the second light is provided to the first seating part, and the third light is not provided to the first filter. The third light further comprises a first mirror that reflects,
The light sensing device further comprising: a second mounting part disposed between the first mounting part and the second filter and including the light emitting material for emitting the third light in response to the second light. The method of claim 1,
The light sensing device according to claim 1, further comprising a lens disposed between the light source unit and the first filter and collimating the first light. The method of claim 1,
and the light source unit and the light receiving unit are disposed such that the center of the light source unit and the center of the light receiving unit are positioned on a straight line. The method of claim 1,
When the explosive particles are seated in the first mounting portion, the second wavelength range is changed and the intensity of the fifth light is changed in the fourth wavelength range, and in response to the change of the intensity of the fifth light, in the air An optical sensing device, characterized in that detecting the presence of the explosive particles. The method of claim 1,
and a beam splitter disposed between the first filter and the first seating part and refracting the second light so that the second light is provided to the first seating part. 6. The method of claim 5,
The light source unit and the first filter are disposed on a first side of the beam splitter,
The first seating portion is disposed on a second side different from the first side of the beam splitter,
The second filter, the third filter, and the light receiving unit are arranged on a third side opposite to the second side of the beam splitter and different from the first side of the beam splitter. a suction nozzle having an inlet through which air containing explosive particles is introduced at one end thereof;
a discharge nozzle having a discharge port through which the air is discharged at one end;
an optical sensing device for detecting the explosive particles in the air using light and generating a detection signal;
a first guide pipe connected to the other end of the suction nozzle and guiding the air introduced through the suction nozzle to the optical sensing device;
a suction force generating unit which is formed at the other end of the discharge nozzle and connected to the discharge nozzle, and provides suction force for sucking air in the optical sensing device and discharging it to the discharge port while allowing the air to be sucked through the suction port;
a second guide tube formed between the optical sensing device and the suction force generating unit to discharge the air introduced into the optical sensing device by the suction force generated by the suction force generating unit to an outlet of the discharge nozzle; and
a controller for determining whether the explosive particles are present in the air using the detection signal;
The optical sensing device,
a light source unit irradiating a first light having a first wavelength range;
a first filter for filtering the first light and outputting a filtered second light having one specific wavelength included in the first wavelength range;
a first mounting part including a light emitting material that emits a third light having a second wavelength range different from the first wavelength range in response to the second light;
Filtering the third light based on a first reference wavelength for performing short-wavelength cutoff filtering, the filtered fourth light included in the second wavelength range and having a third wavelength range longer than or equal to the first reference wavelength a second filter to output;
Filtering the fourth light based on a second reference wavelength different from the first reference wavelength and for performing long wavelength cutoff filtering, a fourth wavelength range included in the third wavelength range and shorter than or equal to the second reference wavelength a third filter for outputting a filtered fifth light having a; and
and a light receiving unit for receiving the fifth light;
detecting whether the explosive particles are present in the air in response to the fourth wavelength range of the fifth light;
The light sensing device is disposed between the first filter and the first seating part, and transmits the second light so that the second light is provided to the first seating part, and the third light is transmitted to the first The third light further comprises a first mirror for reflecting so as not to be provided to the filter,
The light sensing device is disposed between the first mounting unit and the second filter, and further includes a second mounting unit including the light emitting material for emitting the third light in response to the second light. system.

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