KR20120069154A - Manufacturing method of optical fiber sensor and detecting device of temperature using the optical fiber sensor - Google Patents
Manufacturing method of optical fiber sensor and detecting device of temperature using the optical fiber sensor Download PDFInfo
- Publication number
- KR20120069154A KR20120069154A KR1020100130575A KR20100130575A KR20120069154A KR 20120069154 A KR20120069154 A KR 20120069154A KR 1020100130575 A KR1020100130575 A KR 1020100130575A KR 20100130575 A KR20100130575 A KR 20100130575A KR 20120069154 A KR20120069154 A KR 20120069154A
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- South Korea
- Prior art keywords
- optical
- optical fiber
- signal
- fiber sensor
- adhesive
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 122
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 125
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 13
- AQLMHYSWFMLWBS-UHFFFAOYSA-N arsenite(1-) Chemical compound O[As](O)[O-] AQLMHYSWFMLWBS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 13
- 230000031700 light absorption Effects 0.000 claims abstract description 3
- 239000000853 adhesive Substances 0.000 claims description 26
- 230000001070 adhesive effect Effects 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 12
- 230000000694 effects Effects 0.000 description 12
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35383—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
- G01J5/54—Optical arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
- G02B6/3861—Adhesive bonding
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The optical sensor manufacturing method according to the present invention is characterized in that it comprises the step of inserting a multi-mode optical fiber in the cylindrical fixed pipe and the step of inserting a gallium arsenite (GaAs) optical element between the optical fiber.
An apparatus for detecting temperature using an optical fiber sensor according to the present invention includes an optical output unit comprising an LED for generating an optical wavelength, an optical signal splitting unit connected to the optical output unit and dividing an optical signal of the optical output unit, and the optical signal connecting unit; And a photodiode unit connected to the optical sensor unit for detecting an amount of light absorption, and a photodiode unit connected to the optical sensor unit to control the detected optical signal and convert the light signal into an electrical signal.
Description
The present invention is an optical fiber sensor for detecting an optical signal and a temperature detecting device using the optical fiber sensor. More specifically, a technology for manufacturing an optical fiber sensor that minimizes optical loss, and using such an optical fiber sensor, enables efficient temperature detection work. It is about.
In general, the optical fiber sensor plays a role of transmitting the optical signal, and the less the optical loss, the more efficient the sensor can be used.
Although various types of optical fiber sensors have been developed to increase the efficiency of such optical fiber sensors, there are frequent cases where optical output is lost during the manufacturing process, and the performance of the optical sensor is degraded according to the optical loss rate that occurs during optical fiber sensor manufacturing. have.
In addition, in the conventional temperature detection apparatus using the optical fiber sensor, the optical output unit and the optical fiber sensor correspond one-to-one to transmit the optical signal.
Accordingly, since a light output part proportional to the number of optical fiber sensors must be provided, a circuit configuration is complicated and a disadvantage arises in that the light output part must be configured in proportion to the number of sensors.
The present invention has been proposed to solve the above conventional problems,
An object of the optical fiber sensor manufacturing method according to the present invention is to insert an optical element between the multi-mode optical fiber, to increase the efficiency of the optical fiber sensor.
Another object is to minimize the damage of the optical fiber by protecting the distal end of the optical fiber when the optical fiber is inserted into the fixed pipe.
Another object is to stably fix plate-type gallium arsenite (GaAs) optical elements between optical fibers.
Still another object is to further include the step of forming an adhesive inlet on the outside of the housing, to facilitate the insertion of the adhesive.
Another object is to prevent the pressure on the GaAs optical device by using a soft adhesive when fixing the GaAs optical device between the optical fibers.
Yet another object is to use hard glue to secure the bond between the optical fiber, the fixed pipe and the housing.
An object of the temperature detection apparatus using the optical fiber sensor according to the present invention is to divide the optical signal generated in the optical output unit, and transmit to a plurality of optical fiber sensors, to reduce the number of optical output unit to increase the economic efficiency, simplify the circuit configuration It is.
Another object is to generate a stabilized reference light signal and a measurement signal for temperature detection.
Still another object is to divide a signal of the light output unit into a plurality of signals by using the optical signal splitter and provide the optical signal to the optical fiber sensor.
Yet another object is to provide a stable output signal with an analog / digital converter.
Another object is to calculate an accurate temperature by a combination of a reference (reference) signal, a measurement signal, and a bias offset signal.
The method of manufacturing an optical fiber sensor according to the present invention includes inserting a multimode optical fiber into a cylindrical fixed pipe and inserting a gallium arsenite (GaAs) optical device between the optical fibers.
In addition, the multi-mode optical fiber of the manufacturing method of the optical fiber sensor according to the present invention, the step of forming an optical element insertion groove of the inner center depth at a point of the fixed pipe, the step of bonding the Teflon tube to the end of the optical fiber, fixed And inserting the optical fiber at both ends of the pipe and using the first adhesive to fix the optical fiber in the fixed pipe.
In addition, the step of inserting a gallium arsenite (GaAs) optical device of the optical fiber sensor manufacturing method according to the present invention, the step of inserting a GaAs crystal optical device in the form of a plate between the optical fiber in the fixed pipe, using the second adhesive, the GaAs Fixing the optical device, arranging a housing outside the fixed pipe, and inserting an adhesive between the housing and the fixed pipe to harden the optical device.
An apparatus for detecting temperature using an optical fiber sensor according to the present invention includes an optical output unit comprising an LED for generating an optical output, an optical signal splitting unit connected to the optical output unit and dividing an optical signal of the optical output unit, and the optical signal connecting unit; And a photodiode sensor unit connected to the optical fiber sensor unit for detecting an amount of light absorption, and a photodiode unit connected to the optical fiber sensor unit to control the detected optical signal and convert the detected optical signal into an electrical signal.
As described above, the optical fiber sensor manufacturing method according to the present invention has an effect that can increase the efficiency of the optical fiber sensor by inserting the optical element between the multi-mode optical fiber.
In addition, when the optical fiber is inserted into the fixed pipe, by protecting the end of the optical fiber, there is an effect that can minimize the damage of the optical fiber.
In addition, there is an effect that the plate-type gallium arsenite (GaAs) optical element can be stably fixed between the optical fiber.
In addition, by further comprising the step of forming an adhesive inlet on the outside of the housing, there is an effect that can be easily added to the adhesive.
In addition, when fixing the GaAs optical device between the optical fibers, by using a soft adhesive, there is an effect that can prevent the pressure applied to the GaAs optical device.
In addition, by using a hard adhesive, there is an effect of strengthening the coupling between the optical fiber, the fixed pipe and the housing.
The temperature detection device using the optical fiber sensor according to the present invention divides an optical signal generated from the optical output unit and transmits the optical signal to a plurality of optical fiber sensors, thereby increasing the efficiency of the optical output unit and simplifying the circuit configuration.
In addition, there is an effect capable of generating a stabilized reference optical signal and a measurement signal for temperature detection.
In addition, by using the optical signal splitting unit, there is an effect that the signal of the light output LED can be divided into a plurality of signals and provided to the optical fiber sensor.
In addition, by providing an analog / digital converter, there is an effect that can provide a stable output signal.
In addition, there is an effect that can calculate the correct temperature by the combination of the reference signal, the measurement signal and the bias offset signal.
1 is an overall flowchart of a method of manufacturing an optical fiber sensor according to the present invention;
2 is a view showing the structure of a fixed pipe of the optical fiber sensor manufacturing method according to the present invention.
Figure 3 is a view showing the internal coupling structure of the optical fiber sensor of the optical fiber sensor manufacturing method according to the present invention.
Figure 4 is a perspective view showing the appearance of the optical fiber sensor of the optical fiber sensor manufacturing method according to the present invention.
5 is a block diagram of a temperature detection device using an optical fiber sensor according to the present invention.
6 is a view showing an output signal of the optical wavelength generator of the temperature detection device using the optical fiber sensor according to the present invention.
7 is a view showing a photodiode and an output signal of each sensor of the temperature detection device using the optical fiber sensor according to the present invention.
Hereinafter, specific details for carrying out the optical fiber sensor manufacturing method according to the present invention will be described.
1 is a flowchart illustrating a method of manufacturing an optical fiber sensor according to the present invention. First, an optical device insertion groove 15 capable of inserting a gallium arsenite (GaAs) optical device may be formed at a point of a fixed pipe. (S11)
The step S11 refers to the step of forming a groove by the depth of the inner center at an outer point of the
In the embodiment of the present invention, the optical
Next, the step of adhering the Teflon
The step S13 serves to prevent the optical fiber from being damaged when the optical fiber is inserted into the
Next, the step of inserting the
In the step S13, as shown in FIG. 3, the
In the embodiment of the present invention, the spacing between the
Next, the step of inspecting the optical power of the
Step S17 is a step of checking the optical loss generated when the optical fiber is connected, the loss due to the gap is preferably 1dB or less.
Next, the step of checking whether the light loss ratio of the step S17 is normal is performed (S19).
If the light loss is large in step S17, after performing the step (S20) of washing the cut portion of the
Next, the step of fixing the
In order to firmly fix the
Next, a step of inserting a gallium arsenite (GaAs)
The gallium arsenite (GaAs)
Next, the gallium arsenite (GaAs)
In the step S25, the second adhesive 35 to fix the gallium arsenite (GaAs)
Next, the
Next, fixing the
As shown in FIG. 4, the step S29 includes forming an
That is, the
As described above, the optical fiber sensor manufacturing method according to the present invention is to insert a plate-type GaAs optical element between the multi-mode optical fiber, to provide an optical fiber sensor with high efficiency in terms of light loss, further reducing the cost.
The temperature detection apparatus using the optical fiber sensor according to the present invention is characterized by detecting the temperature by providing an optical signal generated in a single optical output unit consisting of LEDs for generating an optical signal to a plurality of optical fiber sensors.
5 is a block diagram for implementing a temperature detection apparatus using an optical fiber sensor according to the present invention, an
The
The reference channel 63 serves to generate a reference light wavelength, and in the exemplary embodiment of the present invention, the reference channel 63 includes one LED for generating an optical wavelength of 1300 nm.
In addition, the working
The signals generated in the reference channel 63 and the working
The
The X-type first spectroscope 73 -X coupler combines the optical signals of the working
The Y-type second spectroscope 75-Y coupler redistributes each of the divided signals of the X-type
The optical signal generated from the Y-type
The optical
In an embodiment of the present invention, the
The optical signal detected by the optical
The
The voltage signal generated by the
In addition, the voltage signal detected in the reference channel 63 receives the signal of the
In addition, the voltage signal generated in the working
The signal of the
The reference signal V r of the optical
In addition, the bias offset signal V b may be represented as shown in (c) of FIG. 7.
In addition, by using the signal value detected by the optical
As described above, the temperature detection apparatus using the optical fiber sensor according to the present invention divides the optical signal generated by the
Although the embodiments of the present invention have been described above, the technical idea of the present invention is not limited to the above embodiments, and various optical fiber sensor manufacturing methods and a temperature detection device using the optical fiber sensor may be implemented in a range that does not depart from the technical idea of the present invention. Can be.
10: fixed pipe 20: optical fiber
30: GaAs optical element 40: housing
50: optical fiber sensor 60: light output unit
70: optical signal splitting section 80: photodiode section
90: connection portion 100: temperature detection device
Claims (13)
The multi-mode optical fiber,
Forming an optical element insertion groove having an inner central depth at one point of the fixed pipe;
Adhering a protective tube to the optical fiber ends;
Inserting optical fibers at both ends of the fixed pipe; and
Fixing the optical fiber in the fixing pipe, using the first adhesive.
Before fixing the optical fiber in the fixed pipe,
Determining the optical loss of the inserted optical fiber;
If the optical loss is more than the reference value, further comprising the step of washing the optical fiber cutting method.
Inserting the gallium arsenite (GaAs) optical device,
Inserting a plate-shaped GaAs crystal optical device between the optical fibers in the fixed pipe;
Fixing the GaAs optical device using a second adhesive;
Disposing a housing outside the fixed pipe; and
And inserting an adhesive between the housing and the fixed pipe to cure the optical fiber sensor.
Arranging the housing outside the ferropipe,
And forming an adhesive inlet for easily inserting an adhesive into the outer surface of the housing.
The second adhesive for fixing the GaAs optical device, the optical fiber sensor manufacturing method, characterized in that the soft adhesive to prevent mechanical pressure on the GaAs optical device in the range of -20 ℃ to 120 ℃.
The first adhesive for fixing the optical fiber is a hard adhesive of any one of BIPAX, TPA-BOND, BA-F123, characterized in that the optical fiber sensor manufacturing method.
An optical output unit configured of an LED for generating an optical signal;
An optical signal splitter connected to the optical output unit and dividing a wavelength signal of the optical output unit;
An optical fiber sensor unit connected to the optical signal splitter to detect an amount of light absorption according to a temperature change;
And a photodiode unit connected to the optical fiber sensor unit to control the detected optical signal and convert the detected optical signal into an electrical signal.
The light output unit,
A working channel for generating an optical wavelength used as a measurement signal, and
And a reference channel for generating a reference light wavelength of the measurement signal.
The optical signal splitter comprises: an X-type first splitter which combines the optical signals of the working channel and the reference channel into two signals;
And a Y-type second spectrometer connected to the first spectroscope to redistribute each divided signal of the first spectroscope.
The photodiode is a temperature detection device using an optical fiber sensor, characterized in that the analog-to-digital converter further converts the analog electrical signal of the sensor unit into a digital electrical signal.
The optical fiber sensor unit,
Outputs a working signal, a measurement signal, a reference signal, and a bias offset signal,
The temperature calculation using the signal,
(Equation 1)
A temperature detection device using an optical fiber sensor, characterized in that it is calculated as (working signal-bias signal) / (reference signal-bias signal).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100130575A KR20120069154A (en) | 2010-12-20 | 2010-12-20 | Manufacturing method of optical fiber sensor and detecting device of temperature using the optical fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100130575A KR20120069154A (en) | 2010-12-20 | 2010-12-20 | Manufacturing method of optical fiber sensor and detecting device of temperature using the optical fiber sensor |
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| Publication Number | Publication Date |
|---|---|
| KR20120069154A true KR20120069154A (en) | 2012-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020100130575A KR20120069154A (en) | 2010-12-20 | 2010-12-20 | Manufacturing method of optical fiber sensor and detecting device of temperature using the optical fiber sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150006776A (en) * | 2013-07-09 | 2015-01-19 | 미쓰비시덴키 가부시키가이샤 | Semiconductor device |
| KR101517032B1 (en) * | 2013-11-18 | 2015-05-04 | 삼현컴텍(주) | Temperature measurement system involving optic channel switch |
| WO2020102561A1 (en) * | 2018-11-15 | 2020-05-22 | General Electric Company | Systems and methods for providing a stable wavelength reference in an integrated photonic circuit |
| CN114383641A (en) * | 2022-01-17 | 2022-04-22 | 欧梯恩智能科技(苏州)有限公司 | Optical sensing demodulation module and optical sensing system |
| CN116577890A (en) * | 2023-07-07 | 2023-08-11 | 成都亨通光通信有限公司 | Layer stranded type mining optical cable |
-
2010
- 2010-12-20 KR KR1020100130575A patent/KR20120069154A/en not_active Application Discontinuation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150006776A (en) * | 2013-07-09 | 2015-01-19 | 미쓰비시덴키 가부시키가이샤 | Semiconductor device |
| KR101517032B1 (en) * | 2013-11-18 | 2015-05-04 | 삼현컴텍(주) | Temperature measurement system involving optic channel switch |
| WO2020102561A1 (en) * | 2018-11-15 | 2020-05-22 | General Electric Company | Systems and methods for providing a stable wavelength reference in an integrated photonic circuit |
| CN114383641A (en) * | 2022-01-17 | 2022-04-22 | 欧梯恩智能科技(苏州)有限公司 | Optical sensing demodulation module and optical sensing system |
| CN114383641B (en) * | 2022-01-17 | 2024-03-05 | 欧梯恩智能科技(苏州)有限公司 | Optical sensing demodulation module and optical sensing system |
| CN116577890A (en) * | 2023-07-07 | 2023-08-11 | 成都亨通光通信有限公司 | Layer stranded type mining optical cable |
| CN116577890B (en) * | 2023-07-07 | 2023-09-19 | 成都亨通光通信有限公司 | Layer stranded type mining optical cable |
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