KR20160102756A - Optical tomography apparatus - Google Patents

Optical tomography apparatus Download PDF

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Publication number
KR20160102756A
KR20160102756A KR1020150025230A KR20150025230A KR20160102756A KR 20160102756 A KR20160102756 A KR 20160102756A KR 1020150025230 A KR1020150025230 A KR 1020150025230A KR 20150025230 A KR20150025230 A KR 20150025230A KR 20160102756 A KR20160102756 A KR 20160102756A
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KR
South Korea
Prior art keywords
fluid
light
light source
spray
injector
Prior art date
Application number
KR1020150025230A
Other languages
Korean (ko)
Inventor
윤영빈
조성호
박구정
Original Assignee
서울대학교산학협력단
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Priority to KR1020150025230A priority Critical patent/KR20160102756A/en
Publication of KR20160102756A publication Critical patent/KR20160102756A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
    • G01N15/0227—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging using imaging, e.g. a projected image of suspension; using holography
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/59—Transmissivity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N2015/0023—Investigating dispersion of liquids
    • G01N2015/0026—Investigating dispersion of liquids in gas, e.g. fog
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G01N2021/8557—Special shaping of flow, e.g. using a by-pass line, jet flow, curtain flow

Abstract

The present invention relates to an optical tomography apparatus, and more particularly, to an optical tomography apparatus comprising an injector for performing atomization of a fluid; A light source portion disposed on a side portion of the spray region of the fluid sprayed through the injector; An optical detector disposed on the side of the spray area of the fluid sprayed through the injector and receiving light generated in the light source part; And a controller for processing the light received by the optical detector to generate information,
The light generated by the light source unit is composed of linear fluorescent light. The light is incident on the spraying region of the fluid from the outside, passes through the fluid, is received by the photodetector, is incident to the spraying direction of the fluid in the lateral direction, And processing the light received by the optical detector to visually indicate the distribution of the fluid in the sprayed area of the fluid.

Description

[0001] OPTICAL TOMOGRAPHY APPARATUS [0002]

The present invention relates to an optical tomography apparatus, and more particularly, to an optical tomography apparatus comprising an injector for performing atomization of a fluid; A light source portion disposed on a side portion of the spray region of the fluid sprayed through the injector; An optical detector disposed on the side of the spray area of the fluid sprayed through the injector and receiving light generated in the light source part; And a controller for processing the light received by the optical detector to generate information,

The light generated by the light source unit is composed of linear fluorescent light. The light is incident on the spraying region of the fluid from the outside, passes through the fluid, is received by the photodetector, is incident to the spraying direction of the fluid in the lateral direction, And processing the light received by the optical detector to visually indicate the distribution of the fluid in the sprayed area of the fluid.

When a predetermined fluid is sprayed through the nozzle, the distribution of the fluid in the spray region region of the fluid may vary depending on various environments such as the shape of the nozzle, the ambient pressure, and the like. A variety of optical devices and imaging devices have been developed and used to determine the distribution of fluid within the spraying region of such fluids, but the accuracy of the fluid is very poor due to the nature of the fluid.

For example, when a flat light is used, diffuse reflection and refraction may occur due to the droplet of the spray, and the accuracy of the measurement may be very low, and in the case of a high-pressure atmosphere, such accuracy degradation may be further exacerbated.

Therefore, there is a need for an apparatus for accurately measuring the fluid distribution within such a fluid spray area.

≪ RTI ID = 0.0 >

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and an object of the present invention is to provide an injector for performing atomization of a fluid; A light source portion disposed on a side portion of the spray region of the fluid sprayed through the injector; An optical detector disposed on the side of the spray area of the fluid sprayed through the injector and receiving light generated in the light source part; And a control unit for processing the light received by the optical detector to generate information, wherein the light generated by the light source unit is composed of linear fluorescence, is incident on the spraying region of the fluid from the outside, passes through the fluid, The optical tomography apparatus having a configuration that receives light received by a detector and is laterally incident with respect to a spray direction of the fluid and the control unit processes the light received by the optical detector to visually indicate the distribution of the fluid in the sprayed area of the fluid I have to.

According to an aspect of the present invention, there is provided an optical tomography apparatus comprising: an injector for performing atomization of a fluid; A light source portion disposed on a side portion of the spray region of the fluid sprayed through the injector; An optical detector disposed on the side of the spray area of the fluid sprayed through the injector and receiving light generated in the light source part; And a controller for processing the light received by the optical detector to generate information,

The light generated by the light source unit is composed of linear fluorescent light. The light is incident on the spraying region of the fluid from the outside, passes through the fluid, is received by the photodetector, is incident to the spraying direction of the fluid in the lateral direction, And processing the light received by the optical detector to visually indicate the distribution of the fluid in the spray area of the fluid.

Preferably, the injector drive device displaces the injector; Wherein the injector driving device is configured to rotate the injector about the central axis of the spray area of the fluid so that light generated in the light source part enters the fluid from the lateral omnidirectional angle of the spray area of the fluid .

Preferably, an optical drive device for displacing an optical angle of an optical detector and an emission angle of light generated in the light source portion; Wherein the optical drive apparatus horizontally moves the light source unit and the optical detector on a plane perpendicular to the center axis of the spray area of the fluid so that light generated by the light source unit captures a spray area of the fluid on the plane .

Preferably, the optical driving device includes a rotating mirror configured to be rotatable, wherein the rotating mirror is disposed between the light source part and the spraying area of the fluid so that the reflection angle of the light generated in the light source part is changed in accordance with the rotation So that the light reflected through the rotating mirror passes through the spray area of the fluid in a plurality of directions that are different from each other.

Preferably, a first lens is disposed between the sprayed area of the fluid and the light source, a second lens is disposed between the sprayed area of the fluid and the optical detector, and the first lens reflects light generated by the light source And the second lens is configured to collect the light that has been incident in parallel and has passed through the spraying area of the fluid and transmits the collected light to the optical detector.

Preferably, the control unit processes the light received by the optical detector through the spray area of the fluid to measure the attenuation rate of light, and integrates the attenuation rate values at each point of the spray section of the spray area of the fluid, And the spray distribution of the cross section is derived.

Preferably. A chamber having a closed structure, at least a portion of which is optically open; And the injector is disposed in the chamber.

According to the optical tomography apparatus of the present invention, the attenuation ratio of light is measured by processing the light received by the optical detector through the spray area of the fluid, and the attenuation rate of each point of the spray section of the spray area of the fluid is integrated, And the spray distribution of the spraying nozzle is derived.

At this time, a predetermined driving device and a lens are provided so that the light is incident on the sprayed region of the fluid in various directions and also the incident light is captured, so that the attenuation of the light at various points of the sprayed region of the fluid is captured . Accordingly, the transmittance and decay rate of light are measured through the light received by the optical detector through the spray area of the fluid, and the flow rate of the fluid in the spray section across the spray area of the fluid in the horizontal direction Distribution can be derived. Therefore, the light can be incident and captured in various directions and positions, so that the information obtained at various angles and positions can be integrated and processed to derive the spray distribution, so that the spray distribution of the fluid can be accurately obtained.

Further, since only the attenuation rate information of the light is used in the present invention, it is possible to measure the spray which is optically difficult to shoot images. Moreover, since the linear fluorescence is used instead of the plane light, irregular reflection, refraction of the light source passing through the spraying region, distortion due to secondary scattering of the signal passing through the spots, and the like can be reduced. In addition, atomization measurement in a high-pressure environment can be performed.

1 is a conceptual diagram of an optical tomography apparatus according to an embodiment of the present invention.
Fig. 2 shows the spray pattern according to the spray pressure of the injector.
3 shows a spray map showing a spray distribution derived by processing light captured in an optical detector of an optical tomography apparatus according to an embodiment of the present invention in a control unit.
FIG. 4 shows a step-by-step method of measuring the spray distribution using the optical tomography apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present embodiments are not intended to be limiting.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises, "and / or" comprising ", as used herein, unless the recited element, step, operation and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

1 is a conceptual diagram of an optical tomography apparatus 1 according to an embodiment of the present invention.

An optical tomography apparatus (1) according to the present invention comprises: an injector (100) for performing atomization of a fluid; A light source part 200 disposed on a side of a spray area of the fluid sprayed through the injector 100; An optical detector 300 disposed on the side of the spray area of the fluid sprayed through the injector 100 and receiving light generated in the light source 200; And a controller for processing light received by the optical detector 300 to generate information,

Wherein the light incident on the spray region of the fluid is made of linear fluorescence and is incident on the spray region of the fluid from the outside, passes through the fluid and is received by the photodetector, is incident to the spray direction of the fluid in the lateral direction, The control unit processes the light received by the optical detector 300 to visually indicate the distribution of the fluid in the spray area of the fluid.

The injector 100 may include a predetermined nozzle as an apparatus for performing atomization of a fluid. Preferably, the nozzle may have a cylindrical configuration such that the fluid sprayed through the injector 100 may have a relatively uniform distribution. Here, the fluid to be sprayed may include, but is not limited to, liquid fuel and the like.

Meanwhile, the injector 100 may be disposed in a predetermined chamber 110. For example, as shown in FIG. 1, an injector 100 may be disposed in a predetermined chamber 110 to spray a fluid by the injector 100 in the chamber 110. The chamber 110 may have a closed structure as a whole, but may have a structure in which a part of the chamber 110 is optically opened for light incidence by the light source unit 200 and light detection by the optical detector 300, which will be described later. That is, at least one surface of the chamber 110 may be provided with an optical window made of a light transmitting material, for example, an incident window 112 for allowing the light generated by the light source 200 to enter the spray area, And an exit window for allowing the passed light to exit and enter the optical detector 300, respectively. As the chamber 110 is provided, the spraying by the injector 100 can be performed in an atmosphere such as a desired pressure, and the pressure in the chamber 110 can be suitably adjusted, for example, when measuring the atomization distribution of the fluid in a high- This can be achieved by performing the calibration by adjusting.

The light source unit 200 is disposed on the side of the spray area of the fluid sprayed through the injector 100. The light source unit 200 may be, for example, a laser light source unit 200 for generating a predetermined laser beam or the like. However, the light source unit 200 is not limited to the laser light source unit 200, . On the other hand, the light source unit 200 is disposed on the side of the spray area of the fluid, and the light generated by the light source unit 200 is incident from the outside with respect to the spray direction of the fluid. It should be noted that the light source 200 is disposed on the side of the spray area of the fluid is not necessarily limited to the case where the light generating device for generating light is disposed on the side of the spray area of the fluid, It is also sufficient to limit the case where the light incident on the area is incident to the spray area of the fluid through the predetermined reflection device in the lateral direction and thus it is sufficient to satisfy the lateral direction with respect to the spray area of the fluid in terms of the direction of incidence of light.

An optical detector 300 for receiving light generated in the light source unit 200 is provided. The optical detector 300 is disposed on the side of the spraying area of the fluid like the light source 200 and the light generated by the light source 200 passes through the spray area of the fluid to the optical detector 300 So that it can be received. Accordingly, according to the embodiment, the light source unit 200 and the optical detector 300 may be disposed on both sides of the spray area of the fluid, and according to another embodiment, the light generated by the light source unit 200 It can be understood that the spraying region of the fluid is located between the reflection device and the optical detector 300 when the reflection light is reflected by the predetermined reflection device and the reflection light is incident on the optical detector 300.

And a controller for processing the light received by the optical detector 300 to derive predetermined information. The control unit may be connected to the optical detector 300 through a predetermined electric wire, and may include a predetermined information processing device and a data base for processing the light received through the optical detector 300 to derive predetermined information. can do.

On the other hand, the light is incident on the sprayed region of the fluid at various angles and positions in the lateral direction, and the incident light can be captured by the optical detector 300.

According to an embodiment of the present invention, an injector 100 driving device for displacing the injector 100 is provided, and the injector 100 is driven by the injector 100, So that the light generated by the light source unit 200 is incident on the fluid from the lateral omnidirectional angle of the sprayed region of the fluid.

That is, as shown in the drawing, the injector 100 driving device is configured to rotate the injector 100, and the central axis of rotation may be a spray central axis of the fluid injected through the injector 100. Accordingly, even when the optical detector 300 and the light source unit 200 are fixed in position, the injector 100 rotates by the driving device of the injector 100 so that light is incident on the sprayed region of the fluid at various angles, So that it is possible to capture the spray distribution at various angles relative to one spray plane.

According to an embodiment, an optical driving device for displacing an optical angle of the light generated by the light source unit 200 and the optical detector 300; Wherein the optical driving device horizontally moves the light source unit 200 and the optical detector 300 on a plane perpendicular to the central axis of the atomizing region of the fluid so that light generated in the light source unit 200 And to capture a sprayed area of the fluid on the plane.

That is, as shown in the drawing, by moving the light source unit 200 and the optical drive unit on a horizontal plane in a state where a spray area of the fluid sprayed through the injector 100 is fixed, To allow the capture of the spray distribution at various locations in the spray area of the fluid. The displacement of the light source unit 200 may be perpendicular to the central axis of the spray area of the fluid, and the optical detector 300 may correspond to the displacement of the light source unit 200, Can move together. According to another embodiment, the optical detector 300 may rotate the light source unit 200 and the optical detector 300 about the center axis of the spray area of the fluid.

According to one embodiment, the optical driving apparatus includes a rotating mirror 400 configured to be rotatable, and the rotating mirror 400 is disposed between the light source unit 200 and the spraying region of the fluid, The reflection angle of the light generated in the light source unit 200 is changed according to the rotation so that the light reflected through the rotation mirror 400 passes through the spray area of the fluid in a plurality of directions different from each other.

That is, a predetermined mirror is disposed between the light source 200 and the spraying area of the fluid to reflect the light generated by the light source 200 to be incident on the spray area of the fluid, By configuring the angle to be adjustable, the light generated by the light source 200 can be incident on the sprayed region of the fluid at various angles. Meanwhile, at this time, the optical detector 300 may move together with the path of the reflected light, but the present invention is not limited thereto.

According to the above-described structure, the light generated by the light source unit 200 can sweep all of the sprayed areas of the fluid, so that the entire cross-section of the sprayed area of the fluid can be grasped.

According to one embodiment, a first lens 510 is disposed between the spray region of the fluid and the light source 200, and a second lens 520 is disposed between the spray region of the fluid and the optical detector 300 And the first lens 510 causes the light generated from the light source 200 to be incident on a predetermined spray region of the fluid in parallel with the second lens 520, Collecting light passing through the spraying region and transmitting the collected light to the optical detector 300.

The first lens 510 and the second lens 520 may each be a convex lens. Accordingly, the light generated by the light source unit 200 is refracted so that the incident light incident on the sprayed region of the fluid is made into a linear fluorescence and is incident in parallel, and the light passing through the sprayed region of the fluid in parallel The second lens 520 may be refracted and incident on the optical detector 300. The first lens 510 and the second lens 520 may have a predetermined focus and refractive index to achieve such a function. Accordingly, the light incident on the spraying region of the fluid may be a plurality of linear lights parallel to each other.

FIG. 2 shows the spray pattern according to the spraying pressure of the injector 100, and FIG. 3 shows a case where the light captured in the optical detector 300 of the optical tomography apparatus 1 according to the embodiment of the present invention is processed in the control unit And a spray map showing the derived spray distribution. 3 shows the spray distribution according to the spraying pressure of the injector 100. In the case of a, the spraying pressure is 0.1 MPa, b is 1 MPa, c is 2 MPa, d is 3 MPa Respectively.

The control unit processes the light received by the optical detector 300 through the sprayed region of the fluid to measure the attenuation rate of the light, integrating the attenuation rate values at each point of the sprayed region of the sprayed region of the fluid, And the spray distribution of the spraying nozzle is derived.

That is, as described above, a predetermined driving device and a lens are provided to cause light to be incident on the spraying area of the fluid in various directions, and also to capture the incident light, Attenuation of light can be captured. Accordingly, the transmittance and the decay rate of light are measured through the light received by the optical detector 300 through the spray area of the fluid, and the transmittance and decay rate of the light are measured using the transmittance and decay rates of the light, The spray distribution of the fluid can be derived.

At this time, since the light can be incident and captured in various directions and positions as described above, information obtained at various angles and positions can be integrated and processed to derive the spray distribution, so that the spray distribution of the fluid can be accurately obtained.

Further, since only the attenuation rate information of the light is used in the present invention, it is possible to measure the spray which is optically difficult to shoot images. Moreover, since the linear fluorescence is used instead of the plane light, irregular reflection, refraction of the light source passing through the spraying region, distortion due to secondary scattering of the signal passing through the spots, and the like can be reduced. In addition, atomization measurement in a high-pressure environment can be performed.

Fig. 4 shows a step-by-step method of measuring the spray distribution using the optical tomography apparatus 1 according to the present invention.

First, the fluid is sprayed through the injector 100, and the distribution of one end face of the sprayed region of the fluid is captured using the light source 200 and the optical detector 300, which are located laterally with respect to the sprayed region.

Subsequently, the injector 100 is rotated using a predetermined driving device, or the optical detector 300 is displaced by rotating the light source unit 200 or the rotating mirror 400 is rotated, Captures the distribution of the various cross sections of the region, and collects and integrates the information obtained through the acquisition process at the control unit to derive a map of the spray distribution of the fluid.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

1: Optical tomography device.
100: injector
110: chamber
112: Entrance window
114: Outgoing window
200: light source
300: optical detector
400: rotating mirror
510: first lens
520: second lens

Claims (7)

An injector for performing atomization of the fluid;
A light source portion disposed on a side portion of the spray region of the fluid sprayed through the injector;
An optical detector disposed on the side of the spray area of the fluid sprayed through the injector and receiving light generated in the light source part;
And a controller for processing the light received by the optical detector to generate information,
Wherein the light generated by the light source is linearly polarized light and is incident on the spraying region of the fluid from the outside, passes through the fluid, is received by the photodetector, is incident to the spraying direction of the fluid in a lateral direction,
Wherein the control unit processes the light received by the optical detector to visually indicate the distribution of the fluid in the spray area of the fluid. The method according to claim 1,
An injector drive device for displacing the injector; Further comprising:
Wherein the injector driving device rotates the injector about the center axis of the spraying area of the fluid so that light generated by the light source part is incident on the fluid from the lateral omni angle of the spray area of the fluid. The method according to claim 1,
An optical driver for displacing an optical angle of the light emitted by the light source and an optical detector; Further comprising:
The optical driving device includes:
Wherein the light source and the optical detector are horizontally moved on a plane perpendicular to the center axis of the spray area of the fluid so that the light generated in the light source captures the spray area of the fluid on the plane. The method of claim 3,
The optical driving device includes:
A rotating mirror configured to be rotatable,
Wherein the rotating mirror comprises:
A light source disposed between the light source and the spray area of the fluid,
Wherein the angle of reflection of light generated in the light source portion is changed in accordance with rotation so that light reflected through the rotating mirror passes through the spraying region of the fluid in a plurality of directions different from each other. The method according to claim 1,
A first lens is disposed between the spraying region of the fluid and the light source portion,
A second lens is disposed between the spray region of the fluid and the optical detector,
Wherein the first lens causes the light generated by the light source unit to be incident on the spraying region of the predetermined fluid in parallel with each other,
And the second lens collects light that is incident in parallel and that has passed through the spraying region of the fluid and transmits the collected light to the optical detector. The method according to claim 1,
Wherein,
Measuring a decay rate of light by processing light received by the optical detector through a spray area of the fluid,
Wherein the attenuation rate value of each point of the spray section of the spray area of the fluid is integrated to derive the spray distribution of the spray section. The method according to claim 1,
A chamber having a closed structure, at least a portion of which is optically open; Further comprising:
Wherein the injector is disposed within the chamber.
KR1020150025230A 2015-02-23 2015-02-23 Optical tomography apparatus KR20160102756A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102235245B1 (en) * 2019-10-14 2021-04-05 한국표준과학연구원 Light Irradiation Apparatus for Particle Monitoring, and Particle Measuring Apparatus using the Same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120048313A (en) 2010-11-05 2012-05-15 부산대학교 산학협력단 Apparatus for measurement based on fbg sensor and bridge bearing thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120048313A (en) 2010-11-05 2012-05-15 부산대학교 산학협력단 Apparatus for measurement based on fbg sensor and bridge bearing thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102235245B1 (en) * 2019-10-14 2021-04-05 한국표준과학연구원 Light Irradiation Apparatus for Particle Monitoring, and Particle Measuring Apparatus using the Same

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