KR101877626B1 - Detector and detecting method using the same - Google Patents

Detector and detecting method using the same Download PDF

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Publication number
KR101877626B1
KR101877626B1 KR1020160121394A KR20160121394A KR101877626B1 KR 101877626 B1 KR101877626 B1 KR 101877626B1 KR 1020160121394 A KR1020160121394 A KR 1020160121394A KR 20160121394 A KR20160121394 A KR 20160121394A KR 101877626 B1 KR101877626 B1 KR 101877626B1
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light
optical fiber
amount
core
petroleum
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KR1020160121394A
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Korean (ko)
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KR20180032330A (en
Inventor
홍성민
송준화
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전자부품연구원
(주)케이에스티테크놀로지
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Priority to KR1020160121394A priority Critical patent/KR101877626B1/en
Priority to PCT/KR2017/010416 priority patent/WO2018056725A1/en
Publication of KR20180032330A publication Critical patent/KR20180032330A/en
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    • 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
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • 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
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
    • 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
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
    • G01N21/431—Dip refractometers, e.g. using optical fibres
    • 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
    • G01N21/88—Investigating the presence of flaws or contamination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • 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
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
    • G01N21/431—Dip refractometers, e.g. using optical fibres
    • G01N2021/432—Dip refractometers, e.g. using optical fibres comprising optical fibres
    • 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
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G01N2021/8812—Diffuse illumination, e.g. "sky"
    • G01N2021/8816—Diffuse illumination, e.g. "sky" by using multiple sources, e.g. LEDs

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A compact and portable detection device that can be implemented with a simple structure and capable of accurate measurement and a detection method using the same are proposed. The detection device according to the present invention includes an optical fiber including a core and a clad layer surrounding the core, a light emitting portion located at one end of the optical fiber, and a light receiving portion located at the other end of the optical fiber, The detection target substance can be detected by measuring the light amount of the light that has passed through the optical fiber in a state in which the detection target substance is in contact with the detection target substance.

Description

DETECTION DEVICE AND DETECTION METHOD USING THE SAME

The present invention relates to a detection apparatus and a detection method using the same, and more particularly, to a small and portable detection apparatus and a detection method using the detection apparatus.

Recently, the surge in petroleum prices has led to frequent use of petroleum-like petroleum and similar petroleum oils. Similar petroleum refers to a product that is manufactured to be used as a fuel to replace petroleum additives, additives, solvents, or the like.

In the case of using similar petroleum, there are problems such as shortening of engine life, reduction of fuel consumption and power output, property damage due to fire and explosion accident, deterioration of air pollution, tax evasion, deterioration of national competitiveness and inhibition of petroleum distribution order. For example, Cenox-like gasoline has a 62% increase in the amount of carcinogenic aldehyde compared to genuine gasoline. Exhaust gas emissions from similar petroleum products are 8 to 50% , And 14 to 103% in the case of similar diesel oil.

Usually a common method for identifying similar petroleum is to analyze the composition of gasoline using molecular mass analysis. However, when using mass spectrometry, efficiency is low because it takes a lot of time about two days to collect the sample and perform the test analysis (NIR) to determine the result. A method of using a test vehicle has also been proposed. This method is a non-pulsating field inspection method which can discriminate an abnormality at the same time with a gasoline using a vehicle equipped with a test apparatus. The nonsteroidal field test method also requires a lot of manpower and long time.

In addition, the proposed petroleum inspection method is mostly an optical method and it is possible to analyze the exact components, but it is not possible to carry out the system because it is huge, and the manufacturing cost is very high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a small and portable detection device that can be implemented with a simple structure and can measure accurately, and a detection method using the same.

According to an aspect of the present invention, there is provided a detection apparatus including: an optical fiber including a core and a clad layer surrounding the core; A light emitting portion located at one end of the optical fiber; And a light receiving unit located at the other end of the optical fiber. The detection target material can be detected by measuring the amount of light passing through the optical fiber in a state in which the detection target material is in contact with the removal region formed by removing a part of the clad layer.

The substance to be detected may be petroleum and impurities. In this case, the impurity may be at least one of ethanol, methanol, acetone, toluene and cenox, and the impurity may be contained in an amount of 10% by weight to 50% by weight of the total weight of the substance to be detected.

The amount of light measured may be based on the difference between the refractive index of petroleum only and the refractive index of a similar petroleum containing impurities.

The detection device according to the present invention can display the measured light amount in decibels (dB).

And the type and content of the impurities can be confirmed based on the measured light amount.

In the optical fiber, the core may have a diameter of 10 mu m and the clad layer may have a thickness of 120 mu m.

The light emitting portion may be a laser diode having a wavelength of 683 nm to 1320 nm, and the light receiving portion may be a photodiode.

The detection device according to the present invention may further include a temperature sensor and a humidity sensor, wherein the light amount can be corrected based on at least one of a temperature value from the temperature sensor and a humidity value from the humidity sensor.

The detection apparatus according to the present invention further includes a display unit, wherein the light amount is measured more than 20 times, and an average value of the measured values excluding the minimum value and the maximum value can be displayed on the display unit.

The type and content of the impurities according to the amount of light can be displayed on the display unit.

According to another aspect of the present invention, there is provided a detection method using a detection device including an optical fiber including a core and a core and a clad layer partially removed, and a light emitting portion and a light receiving portion located at both ends of the optical fiber, Contacting the substance to be detected; Measuring an amount of light passing through the optical fiber; And a step of detecting the detection target material by using the light amount.

INDUSTRIAL APPLICABILITY As described above, according to the embodiments of the present invention, it is possible to manufacture a detecting apparatus which directly uses an optical fiber to simplify the process and reduce the manufacturing cost by lowering the material cost.

It is possible to provide an efficient detection device because it is possible to perform accurate measurement in accordance with the difference in refractive index even with a simple structure, and to judge whether impurities are contained or not in a fast and precise manner, and to manufacture them in a portable manner.

In addition, the present invention can be applied to a case where an alcoholic solvent, which is an impurity, is contained in a petroleum product, so that it can be used even when a user directly injects gas at a gas station or the like.

1 is a cross-sectional view of a detection device according to an embodiment of the present invention.
2 is a functional block diagram of a detection apparatus according to an embodiment of the present invention.
3 is a use diagram of a detection device according to an embodiment of the present invention.
4 is a graph showing the difference in refractive index according to the content of impurities contained in petroleum products.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention. It should be understood that while the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, The present invention is not limited thereto.

1 is a cross-sectional view of a detection device according to an embodiment of the present invention. The detection apparatus 100 according to the present invention includes an optical fiber 110 including a core 112 and a clad layer 111 surrounding the core 112; A light emitting part 120 located at one end of the optical fiber 110; And a light receiving unit 130 located at the other end of the optical fiber 110. The optical fiber 110 in a state in which the detection target material 140 is in contact with the removal region 113 formed by removing a part of the clad layer 111, And detects the detection target substance 140. The detection target substance 140 is a substance that can be detected by detecting the amount of light.

The detecting apparatus (100) of the present invention is a material discriminating sensor using an optical fiber. When the detection device 100 according to the present invention emits light in the light emitting portion 120, the core 112 of the optical fiber 110 becomes an optical waveguide, and the light proceeds. Light traveling through the core 112 can be received by the light receiving unit 130 and measured as an optical signal.

The optical fiber 110 has a structure in which a core 112 as a high refractive index material is disposed inside and a clad layer 111 composed of a low refractive material surrounds the core 112. When light is incident on the optical fiber 110 through the core 112, total internal reflection occurs at the interface between the core 112 and the clad layer 111, and light is not emitted to the clad layer 111, And can proceed from one end of the optical fiber 110 to the other end without loss. This means that an optical waveguide without loss of light can be formed when adjusting the refractive index between the core 112 and the cladding layer 111 to satisfy the total reflection condition.

1, the total reflection condition between the core 112 and the clad layer 111 is collapsed in the vicinity of the removed region 113, so that the core (111) 112 can proceed toward the removal region 113, resulting in optical loss. That is, when a part of the optical fiber 110 is removed, light may partially flow out of the core 112 to the outside of the optical fiber 110, so that the amount of light finally reaching the light receiving part 130 becomes small.

The removal region 113 is formed by removing a part of the clad layer 111 on the upper or lower portion of the core 112, and the core 112 should be formed so as not to be exposed. When the core 112 is exposed, the interface between the core 112 and the clad layer 111 is lost, and light is leaked to the exposed region, and the light amount measurement is impossible.

The optical loss due to the formation of the removal region 113 of the optical fiber 110 is affected by the refractive index of the material adjacent to the removal region 113. For example, when a substance having a refractive index higher than air is brought into contact with the removal region 113, the amount of light to be lost is reduced. That is, as the material having a high refractive index is contacted with the removal region 113, the amount of light to be lost is reduced, and the amount of light measured by the light receiving unit 130 is increased. The removal region 113 can be viewed as a state in which a portion of the clad layer 111 is removed and the region where the clad layer 111 is present is filled with air. There is a high possibility that light that is leaked to the outside and is lost is further propagated to the inside of the optical fiber 110, so that the amount of light to be measured is increased.

When the amount of light in a state in which the detection target substance 140 is in contact with the removal region 113 is measured using this principle, a difference in amount of light occurs according to the refractive index of the detection target substance 140, Lt; RTI ID = 0.0 > 140 < / RTI >

In the optical fiber 110, the core 112 may have a diameter of 10 mu m and the clad layer 111 may have a thickness of 120 mu m. The light emitting unit 120 may be a laser diode having a wavelength of 683 nm to 1320 nm, and the light receiving unit 130 may be a photodiode.

2 is a functional block diagram of a detection apparatus according to an embodiment of the present invention. The detecting apparatus 100 of the present embodiment can include the optical fiber 110, the light emitting unit 120, and the light receiving unit 130, and the description thereof will be omitted. The detection apparatus 100 of the present embodiment may further include a control unit 150, a display unit 160, a temperature sensor 170, and a humidity sensor 180. The control unit 150 can calculate the amount of light by analyzing the optical signal obtained from the light receiving unit 130. The display unit 160 can display the calculated light amount in numerical values, and can display the light amount in decibels (dB).

The amount of light can be measured more than once. For example, the light amount can be measured 20 or more times, and the average value can be calculated and set to the light amount. In addition, the average value of the remaining light amount measurement values can be set to the light amount, except for the minimum value and the maximum value of the light amount measurement value measured 20 times or more.

The detection device 100 may further include a temperature sensor 170 and a humidity sensor 180. The control unit 150 may detect the temperature value from the temperature sensor 170 and the humidity value from the humidity sensor 180 The amount of light can be corrected based on one. Accordingly, it is possible to more accurately acquire the calculated value of the temperature-sensitive or humidity-sensitive detection device 100.

3 is a view for explaining the use of the detection device according to the present invention. The sensor was fabricated using an optical fiber, and it can be confirmed that light is leaked from the removed region formed in the middle to the outside.

4 is a graph showing the difference in refractive index according to the content of impurities contained in petroleum products. The detection device according to the present invention can be used for the purpose of detecting similar petroleum. That is, in the detection device, the substance to be detected may be a petroleum oil and similar petroleum containing impurities.

In the case of petroleum, similar petroleum added with impurities such as additives and solvents has been a problem due to recent price increases. In the case of petroleum, it contains materials such as normal heptane, n-pentane, cyclobutane or hexene. Hereinafter, 'petroleum' refers to pure petroleum containing no impurities and 'petroleum' refers to petroleum containing impurities.

Impurities contained in petroleum-like petroleum include solvents such as ethanol, methanol, acetone and toluene. Further, there is an additive in which a solvent, toluene, methanol or the like is mixed with the trade name " Cenox ".

The amount of light measured in the detecting device according to the present invention may be based on the difference between the refractive index of petroleum and the refractive index of the petroleum-like petroleum containing impurities. Fig. 4 shows the difference in the refractive index between genuine petroleum and ΔRI with respect to the impurity content of the similar petroleum having different impurity contents. In case of ethanol (ethyl alcohol), the smallest difference in refractive index is shown, and toluene shows the greatest difference in refractive index. Cenox, which is a mixture of various materials, has a very high refractive index difference and is expected to be easy to detect.

Referring to FIG. 4, when the impurity is 10% by weight or less of the total weight of the substance to be detected, the refractive index difference is hardly calculated. Therefore, it is presumed that it is difficult to detect similar petroleum. Therefore, it is preferable that the impurities include more than 10% by weight of the total weight of the substance to be detected.

Since the measured light amount is based on the difference between the refractive index of petroleum and the refractive index of petroleum-like petroleum, the light amount (dB) can be directly displayed on the display unit of the detection device, or the kind or content of impurities contained in the petroleum based on the stored light amount value May be displayed directly.

According to another aspect of the present invention, there is provided a detection method using a detection device including an optical fiber including a core and a core and a clad layer partially removed, and a light emitting portion and a light receiving portion located at both ends of the optical fiber, Contacting the substance to be detected; Measuring an amount of light passing through the optical fiber; And a step of detecting the detection target material by using the light amount. In the detection method using an optical fiber, the description of the same contents as those described with reference to the first to fourth embodiments will be omitted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100 detection device
110 optical fiber
111 clad layer
112 cores
113 Removal area
120 Light-
130 light-
140 substance to be detected
150 control unit
160 display unit
170 Temperature sensor
180 Humidity sensor

Claims (15)

An optical fiber including a core and a clad layer surrounding the core;
A light emitting portion located at one end of the optical fiber; And
And a light receiving unit located at the other end of the optical fiber,
A detecting device for detecting the detection target material by measuring a light amount of light that has passed through the optical fiber in a state in which a detection target material is in contact with a removal area formed by removing a part of the clad layer,
Further comprising a temperature sensor and a humidity sensor,
In order to correct the calculated value of the detecting device which changes with temperature and humidity,
Wherein the light amount is corrected based on at least one of a temperature value from the temperature sensor and a humidity value from the humidity sensor.
The method according to claim 1,
Wherein the detection target material is petroleum and impurities.
The method of claim 2,
Wherein the impurities are at least one of ethanol, methanol, acetone, toluene and cenox.
The method of claim 2,
Wherein the impurity is contained in an amount of 10% by weight to 50% by weight of the total weight of the substance to be detected.
The method of claim 2,
Wherein the measured quantity of light is based on a difference between a refractive index of petroleum only and a refractive index of a petroleum-containing petroleum containing the impurity.
The method according to claim 1,
And displays the measured light amount in decibels (dB).
The method of claim 2,
And the type and content of the impurities can be confirmed based on the measured light amount.
The method according to claim 1,
The core has a diameter of 10 mu m,
Wherein the clad layer has a thickness of 120 占 퐉.
The method according to claim 1,
Wherein the light emitting portion is a laser diode having a wavelength of 683 nm to 1320 nm.
The method according to claim 1,
Wherein the light receiving unit is a photodiode.
delete delete The method according to claim 1,
And a display unit,
Wherein the light amount is measured at least 20 times, and an average value of the measured values excluding the minimum value and the maximum value is displayed on the display unit.
The method of claim 2,
And a display unit,
And the type and the content of the impurity according to the amount of light are displayed on the display unit.
1. A detection method using a detection device including an optical fiber including a core and a clad layer surrounding the core and partially removed, and a light emitting portion and a light receiving portion located at both ends of the optical fiber,
Contacting the substance to be detected with the removal region of the clad layer;
Measuring an amount of light passing through the optical fiber;
Correcting an amount of light based on at least one of a temperature value from a temperature sensor and a humidity value from a humidity sensor in order to correct a calculated value of a detection device that varies depending on temperature and humidity; And
And detecting the detection target material using the corrected amount of light.
KR1020160121394A 2016-09-22 2016-09-22 Detector and detecting method using the same KR101877626B1 (en)

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PCT/KR2017/010416 WO2018056725A1 (en) 2016-09-22 2017-09-21 Detecting device and detecting method using same

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080013928A (en) * 2005-05-26 2008-02-13 미쓰비시덴키 가부시키가이샤 Optical fiber sensor
JP2009156592A (en) * 2007-12-25 2009-07-16 Mitsubishi Electric Corp Optical fiber sensor
JP2012065724A (en) * 2010-09-21 2012-04-05 Fujitsu Ltd Fat thickness measuring apparatus and fat thickness calculation program
KR101411917B1 (en) * 2012-12-17 2014-06-26 전자부품연구원 Similar oil detector using the waveguide sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08240484A (en) * 1995-03-06 1996-09-17 Nippon Sheet Glass Co Ltd Infrared spectrum measuring device and optical fiber probe to constitute infrared spectrum measuring device and manufacture of optical fiber probe
JP2003279474A (en) * 2002-03-22 2003-10-02 Yazaki Corp Gas sensor
JP5219033B2 (en) * 2008-03-28 2013-06-26 公益財団法人北九州産業学術推進機構 Atmospheric sensor and manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080013928A (en) * 2005-05-26 2008-02-13 미쓰비시덴키 가부시키가이샤 Optical fiber sensor
JP2009156592A (en) * 2007-12-25 2009-07-16 Mitsubishi Electric Corp Optical fiber sensor
JP2012065724A (en) * 2010-09-21 2012-04-05 Fujitsu Ltd Fat thickness measuring apparatus and fat thickness calculation program
KR101411917B1 (en) * 2012-12-17 2014-06-26 전자부품연구원 Similar oil detector using the waveguide sensor

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