CN116538945B - High-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite section and measuring method thereof - Google Patents
High-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite section and measuring method thereof Download PDFInfo
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- CN116538945B CN116538945B CN202310366079.9A CN202310366079A CN116538945B CN 116538945 B CN116538945 B CN 116538945B CN 202310366079 A CN202310366079 A CN 202310366079A CN 116538945 B CN116538945 B CN 116538945B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 304
- 239000000805 composite resin Substances 0.000 title claims abstract description 25
- 238000000465 moulding Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 42
- 238000012545 processing Methods 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 238000000411 transmission spectrum Methods 0.000 claims description 64
- 230000006698 induction Effects 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000000691 measurement method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 230000004044 response Effects 0.000 abstract description 10
- 230000001939 inductive effect Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000002834 transmittance Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000007405 data analysis Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention belongs to the field of optical sensing, and discloses a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles and a measuring method thereof, wherein the high-speed strain optical fiber sensor comprises a light source (1), a first optical fiber coupler (2), a first optical fiber ring (3), a second optical fiber coupler (4), a second optical fiber ring (5), a deformation sheet (6), a spectrometer (7) and a processing system (8); the invention comprises two mutually coupled optical fiber ring resonators, which can generate an inductive transparent effect, and when the section bar is deformed, the cavity lengths of the two optical fiber ring resonators can generate the same change, so that the period of the inductive transparent effect is changed; the invention has the advantages of light weight, long service life, high precision, electromagnetic interference resistance, good corrosion resistance and high response speed.
Description
Technical Field
The invention belongs to the field of optical sensing, and particularly relates to a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles and a measuring method thereof.
Background
The regenerated organic resin composite section is prepared from waste circuit board resin powder, plastic particles, auxiliary agents and the like through a screw extrusion molding machine, and the biggest difference between the regenerated organic resin composite section and the wood-plastic section is that the waste circuit board resin powder is added, so that the organic resin waste of the circuit board is recycled in a resource mode. The waste circuit board resin powder contains glass fiber, epoxy resin and other components, so that the mechanical property of the profile can be effectively improved, and the efficient cyclic regeneration of waste materials is realized. However, the heat transfer performance of the composite profile is reduced after the waste circuit board resin powder is added, the interior of the material is heated unevenly in the forming process, and transverse bending is more easily generated than that of the wood-plastic profile in the processes of continuous discharging, forming and cooling, as shown in fig. 7.
The composite profile is formed by a grinding tool after being discharged, and is cooled and shaped by circulating water, when the profile is transversely bent, the output parameters of the circulating water and the extrusion speed are required to be quickly adjusted, if the output profile is not timely adjusted, the produced profile cannot be used due to transverse bending, even the produced profile is blocked by a blocking machine and blocked materials due to deformation of the profile, and the product quality and the production efficiency are seriously affected. At present, whether transverse bending of the profile is detected by naked eyes is detected, and the problems of large error, labor consumption, untimely response and the like exist, so that a rapid and efficient profile deformation response method and device are urgently needed to be developed, the rejection rate is effectively reduced, and the production quality and efficiency are improved.
The strain sensor is a sensor for measuring deformation caused by stress of an object, is the most commonly used sensor in industrial production, is widely applied to the fields of aerospace, mechanical manufacturing, petroleum, coal, steel, traffic, metering and the like, and is also commonly used in life of people, such as various electronic scales, material deformation, thrust deformation, dam body bearing condition monitoring and the like.
The most widely used strain sensor is a resistance strain sensor, which is a sensor using a resistance strain gauge as a conversion element, wherein the resistance strain gauge is the most commonly used sensing element and can convert the strain of a mechanical component into the change of a resistance value. The resistance strain sensor consists of an elastic sensitive element, a resistance strain gauge, a compensation resistor and a shell, wherein the elastic sensitive element deforms under the action of force, the resistance strain gauge attached to the elastic sensitive element deforms together, and the resistance strain gauge converts the deformation into the change of a resistance value. The resistance strain sensor has the advantages of wide measuring range, simple structure, good frequency response characteristic, various varieties and the like, but the defects are very obvious: the sensor has low response speed and poor linearity, and the resistance value of the resistance strain gauge caused by deformation is small, so that the output signal is weak, the capability of resisting external electromagnetic interference is poor, and the like. In a word, the existing strain sensor has the defects of heavy weight, high noise, easiness in electromagnetic interference, poor corrosion resistance, low response speed and the like.
The optical fiber device has the advantages of simple structure, small volume, light weight, small loss, flexible and various optical characteristic designs, good stability and the like, the application of the optical fiber in the sensing field is wider and wider, the huge advantages of the optical fiber sensor are gradually highlighted, such as high precision, electromagnetic interference resistance, small influence on the measured environment, high response speed and the like, and the optical fiber sensor is suitable for working in severe environments, can be used in complex environments with strong electromagnetic radiation, strong nuclear radiation and strong corrosiveness in the fields of biology, chemistry and various engineering industries.
Therefore, the high-speed strain optical fiber sensor and the method for detecting the molding of the regenerated organic resin composite section are developed and applied to the detection in the molding process of the regenerated organic resin composite section, and the problems of large error, labor consumption, untimely response and the like caused by naked eye resolution in the prior art can be effectively solved.
Disclosure of Invention
The invention provides a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles and a measuring method thereof, which are used for solving the problems of high weight, easiness in aging, high noise, easiness in electromagnetic interference, poor corrosion resistance and low response speed of the conventional strain sensor and realizing rapid detection and high-efficiency response in the molding process of the regenerated organic resin composite profiles.
The invention is realized by the following technical scheme:
the high-speed strain optical fiber sensor for the molding detection of the regenerated organic resin composite section comprises a light source 1, a first optical fiber coupler 2, a first optical fiber ring 3, a second optical fiber coupler 4, a second optical fiber ring 5, a deformation sheet 6, a spectrometer 7 and a processing system 8;
the light output end of the light source 1 is connected to a first light input end of a first optical fiber coupler 2,
the first optical fiber ring 3 is respectively connected with the second optical input end of the first optical fiber coupler 2 and the second optical output end of the first optical fiber coupler 2;
the first optical fiber ring 3 is respectively connected with a first optical input end of the second optical fiber coupler 4 and a first optical output end of the second optical fiber coupler 4;
the second optical fiber ring 5 is respectively connected with a second optical input end of the second optical fiber coupler 4 and a second optical output end of the second optical fiber coupler 4;
the first optical fiber ring 3 and the second optical fiber ring 5 are both fixed on the surface of the deformation sheet 6;
the first optical output of the first fiber coupler 2 is connected to the optical input of the spectrometer 7,
the electrical output of the spectrometer 7 is connected to an electrical input of a processing system 8, and the electrical output of the processing system 8 outputs a sensor output signal.
The high-speed strain optical fiber sensor for detecting the molding of the regenerated organic resin composite section bar is characterized in that the deformation sheet 6 is a sheet-shaped object, and the deformation sheet 6 is a two-dimensional rectangular object; the long edge of the deformation sheet 6 is in the x direction, the short edge of the deformation sheet 6 is in the y direction,
the optical fiber of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 is along the x direction; the optical fibers of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 are perpendicular to the y direction;
the optical fiber of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 is along the x direction; the optical fibers of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 are perpendicular to the y direction.
The high-speed strain optical fiber sensor for detecting the molding of the regenerated organic resin composite profile comprises a first optical fiber ring 3, a second optical fiber ring 5 and a third optical fiber ring, wherein the length of an optical fiber fixed on the surface of a deformation sheet 6 is the same as that of an optical fiber fixed on the surface of the deformation sheet 6;
the optical fiber materials of the first optical fiber coupler 2, the first optical fiber ring 3, the second optical fiber coupler 4 and the second optical fiber ring 5 are all the same.
The high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite section bars comprises a first optical fiber ring resonant cavity formed by a first optical fiber coupler 2, a first optical fiber ring 3 and a second optical fiber coupler 4;
the second fiber coupler 4 and the second fiber ring 5 form a second fiber ring resonator.
The high-speed strain optical fiber sensor for detecting the molding of the regenerated organic resin composite section comprises a first optical fiber ring 3, wherein the length of an optical fiber fixed on the surface of a deformation sheet 6 is close to half of the cavity length of a first optical fiber ring resonant cavity, but less than half of the cavity length of the first optical fiber ring resonant cavity;
the length of the optical fiber of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 is close to half of the cavity length of the second optical fiber ring resonator, but less than half of the cavity length of the second optical fiber ring resonator;
the cavity length of the first optical fiber ring resonator is the same as that of the second optical fiber ring resonator, and the radius of the first optical fiber ring resonator is larger than that of the second optical fiber ring resonator.
The high-speed strain optical fiber sensor for the molding detection of the regenerated organic resin composite section comprises a first optical fiber ring resonant cavity, wherein the transmissivity of light transmitted in the first optical fiber ring resonant cavity for one circle is close to 1;
and the transmissivity of light transmitted by the second optical fiber ring resonator for one circle in the second optical fiber ring resonator is close to 1.
The first optical fiber coupler 2 is a 2×2 optical fiber coupler, and the coupling ratio is 64:36.
The second optical fiber coupler 4 is a 2×2 optical fiber coupler, and the coupling ratio is 64:36.
The power of the output light of the light source 1 is constant, and the line width of the light is at least 5 times of the frequency interval of the adjacent resonant frequencies of the two optical fiber ring resonators.
The processing system 8 comprises an acquisition filter circuit 8-1 and an analysis output circuit 8-2;
the electric input end of the acquisition filter circuit 8-1 is the electric input end of the processing system 8, and the electric output end of the analysis output circuit 8-2 is the electric output end of the processing system 8;
the electric output end of the spectrometer 7 is connected with the electric input end of the acquisition filter circuit 8-1, the electric output end of the acquisition filter circuit 8-1 is connected with the electric input end of the analysis output circuit 8-2, and the electric output end of the analysis output circuit 8-2 outputs a sensor output signal.
A measurement method of a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles, the measurement method comprising the following steps:
step 1: fixing the deformation sheet 6 on the profile;
step 2: constructing a rectangular coordinate system based on the deformation sheet 6 in the step 1;
step 3: based on the coordinate system of the step 2, when the deformation of the profile is judged based on the period of the induction transparent effect transmission spectrum, if the period of the induction transparent effect transmission spectrum is reduced, the profile is prolonged along the x axis, and if the period of the induction transparent effect transmission spectrum is increased, the profile is shortened along the x axis.
A measurement method of a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite section bar, wherein in the step 2, a rectangular coordinate system is constructed, specifically, the long edge of a deformation sheet 6 is arranged in the x direction, and the short edge of the deformation sheet 6 is arranged in the y direction, so that x and y form the rectangular coordinate system;
the optical fibers of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 are arranged along the x direction;
the optical fibers of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 are arranged along the x direction.
A method for measuring a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles, wherein in the step 3, deformation of the profile in a direction parallel to the long side of a deformation sheet 6 can only be measured.
A method for measuring a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles comprises the following steps that step 3 is specifically that a first light output end of a first optical fiber coupler 2 outputs an induction transparent effect transmission spectrum to a spectrometer 7, the spectrometer 7 collects the transmission spectrum, then the transmission spectrum is converted into a transmission spectrum voltage signal, the transmission spectrum voltage signal is sent to a processing system 8, the processing system 8 collects the transmission spectrum voltage signal, then the transmission spectrum voltage signal is filtered and subjected to data analysis to obtain a transmission spectrum period, deformation of the profile is obtained, finally, the processing system 8 outputs a sensor output signal, and the sensor output signal comprises the deformation of the profile.
The beneficial effects of the invention are as follows:
the invention comprises two mutually coupled optical fiber ring resonators, can generate an inductive transparent effect, and can lead the cavity lengths of the two optical fiber ring resonators to generate the same change when the profile is deformed, thereby changing the period of the inductive transparent effect.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic diagram of the distribution of a first fiber optic ring and a second fiber optic ring of the present invention on a deformable sheet.
Fig. 3 is a schematic diagram of the transmission spectrum of the inductive transparency effect of the output when the cavity length l=1.00 m of the two optical fiber ring resonators of the present invention.
FIG. 4 is a diagram showing the transmission spectrum of the output induced transparency effect when the cavity length L=0.98m of the two fiber ring resonators of the present invention
Fig. 5 is a schematic diagram of the transmission spectrum of the output inductive transparent effect when the cavity length l=1.02m of the two optical fiber ring resonators of the present invention.
Fig. 6 is a schematic circuit diagram of a processing system of the present invention.
Fig. 7 is a schematic view of a transverse bending of a profile according to the prior art.
Fig. 8 is a schematic drawing of prior art profiles that produce shrinkage during cooling that is difficult for the naked eye to observe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The first optical fiber coupler 2, the first optical fiber ring 3 and the second optical fiber coupler 4 form a first optical fiber ring resonant cavity, and the second optical fiber coupler 4 and the second optical fiber ring 5 form a second optical fiber ring resonant cavity;
the output light of the light source 1 enters the first optical fiber ring resonator through the first optical fiber coupler 2, the light is transmitted in the first optical fiber ring resonator and can resonate in the first optical fiber ring resonator, then the light enters the second optical fiber ring resonator through the second optical fiber coupler 4, the light is transmitted in the second optical fiber ring resonator and can resonate in the second optical fiber ring resonator, then the light enters the first optical fiber ring resonator through the second optical fiber coupler 4, and thus, the light can be coupled with each other between the first optical fiber ring resonator and the second optical fiber ring resonator and an induction transparent effect is generated; after the induction transparent effect is generated, light is output by the first optical fiber coupler 2 and enters the spectrometer 7, the spectrometer 7 collects a spectrum, then the spectrum is converted into a spectrum voltage signal, the spectrum voltage signal is sent to the processing system 8, the processing system 8 collects, filters and analyzes the voltage signal, and finally outputs a sensor output signal, and the sensor output signal contains deformation information of the profile;
when light enters the optical fiber ring resonator, light with certain specific frequencies exists, the phase of one circle transmitted in the optical fiber ring resonator is an integral multiple of 2 pi, the light with the frequencies can resonate in the optical fiber ring resonator, the light frequencies are called as the resonant frequency of the optical fiber ring resonator, and the frequency intervals of adjacent resonant frequencies of the optical fiber ring resonator are equal;
since the cavity length of the first optical fiber ring resonator is the same as the cavity length of the second optical fiber ring resonator, and the optical fiber material of the first optical fiber coupler 2, the optical fiber material of the first optical fiber ring 3, the optical fiber material of the second optical fiber coupler 4, and the optical fiber material of the second optical fiber ring 5 are all the same, the refractive index of the first optical fiber ring resonator is equal to that of the second optical fiber ring resonator, and the optical path of light transmitted one round in the first optical fiber ring resonator is equal to that of light transmitted one round in the second optical fiber ring resonator, so that the resonant frequency of the first optical fiber ring resonator is the same as the resonant frequency of the second optical fiber ring resonator;
because light is coupled between the first optical fiber ring resonator and the second optical fiber ring resonator, an inductive transparency effect is generated at the resonant frequencies of the first optical fiber ring resonator and the second optical fiber ring resonator; because the frequency intervals of adjacent resonant frequencies are equal, the frequency distribution of the induction transparency effect is periodic, and the period of the frequency distribution of the induction transparency effect is the frequency interval of the adjacent resonant frequencies, namely the period of the transmission spectrum of the induction transparency effect is the frequency interval of the adjacent resonant frequencies;
since the transmittance of light transmitted by one circle in the first optical fiber ring resonator is close to 1, the transmittance of light transmitted by one circle in the second optical fiber ring resonator is close to 1, the coupling ratio of the first optical fiber coupler 2 is 64:36, and the coupling ratio of the second optical fiber coupler 4 is 64:36, the transmission peak generated by sensing the transparent effect has large transmittance;
when the cavity length l=1.00 m of the two optical fiber ring resonators, the transmission spectrum of the induced transparency effect is shown as a solid line in fig. 3, and the abscissa of the vertical line of the virtual-point in fig. 3 corresponds to the resonance frequency, and due to the induced transparency effect, a transmission peak is generated near the resonance frequency, the maximum transmittance of the transmission peak is 0.98, and at this time, the period of the transmission spectrum of the induced transparency effect is 2.07MHz;
when the cavity length l=0.98m of the two optical fiber ring resonators, the transmission spectrum of the induced transparency effect is shown as a solid line in fig. 4, and the abscissa of the vertical line of the virtual-point in fig. 4 corresponds to the resonance frequency, and due to the induced transparency effect, a transmission peak is generated near the resonance frequency, the maximum transmittance of the transmission peak is 0.98, and at this time, the period of the transmission spectrum of the induced transparency effect is 2.11MHz;
when the cavity length l=1.02m of the two optical fiber ring resonators, the transmission spectrum of the induced transparency effect is shown as a solid line in fig. 5, and the abscissa of the vertical line of the virtual-point in fig. 5 corresponds to the resonance frequency, and due to the induced transparency effect, a transmission peak is generated near the resonance frequency, the maximum transmittance of the transmission peak is 0.98, and at this time, the period of the transmission spectrum of the induced transparency effect is 2.03MHz;
since the power of the output light of the light source 1 is constant and the line width of the light is at least 5 times the frequency interval of adjacent resonance frequencies, an induced transparency effect transmission spectrum can be obtained;
when the deformation of the profile is measured, the deformation sheet 6 is required to be fixed on the profile;
since the deformation sheet 6 is a sheet-like object with small thickness, which can be approximated to a two-dimensional rectangular object, the long side of the rectangle is along the x direction, the short side of the rectangle is along the y direction, x and y form a rectangular coordinate system, the optical fibers of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 are along the x direction, and the optical fibers of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 are along the x direction, therefore, the deformation in the direction parallel to the long side of the deformation sheet 6 can only be measured;
when the profile is deformed in a direction parallel to the long sides of the deformation sheet 6, the following two conditions will occur:
(1) When the profile is elongated in the direction parallel to the long side of the deformation sheet 6, since the deformation sheet 6 may be approximately a two-dimensional rectangular object, the rectangular long side is in the x direction, the optical fiber of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 is in the x direction, the optical fiber of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 is in the x direction, the length of the optical fiber of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 is the same as the length of the optical fiber of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6, and therefore, both the first optical fiber ring 3 and the second optical fiber ring 5 are elongated, and the deformation amount of the first optical fiber ring resonator and the second optical fiber ring resonator are both elongated, and the deformation amount of the cavity length of the first optical fiber ring resonator and the cavity length of the second optical fiber ring resonator are still the same; since the length of the optical fiber of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 is close to half of the cavity length of the first optical fiber ring resonator but less than half of the cavity length of the first optical fiber ring resonator, and the length of the optical fiber of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 is close to half of the cavity length of the second optical fiber ring resonator but less than half of the cavity length of the second optical fiber ring resonator, the cavity length of the first optical fiber ring resonator and the cavity length of the second optical fiber ring resonator are both obviously deformed; because the cavity length of the first optical fiber ring resonator and the cavity length of the second optical fiber ring resonator are both prolonged, and the cavity length of the first optical fiber ring resonator is still the same as the cavity length of the second optical fiber ring resonator, the optical path length of light transmitted by one circle in the first optical fiber ring resonator is still equal to the optical path length of light transmitted by one circle in the second optical fiber ring resonator, so that the resonant frequency of the first optical fiber ring resonator is still the same as the resonant frequency of the second optical fiber ring resonator, but the frequency interval of adjacent resonant frequencies is reduced, namely the period of the transmission spectrum of the induction transparent effect is reduced;
(2) When the profile is shortened in a direction parallel to the long side of the deformation sheet 6, since the deformation sheet 6 may be approximately a two-dimensional rectangular object, the rectangular long side is in the x direction, the optical fiber of which the first optical fiber ring 3 is fixed on the surface of the deformation sheet 6 is in the x direction, the optical fiber of which the second optical fiber ring 5 is fixed on the surface of the deformation sheet 6 is in the x direction, the length of the optical fiber of which the first optical fiber ring 3 is fixed on the surface of the deformation sheet 6 is the same as the length of the optical fiber of which the second optical fiber ring 5 is fixed on the surface of the deformation sheet 6, and therefore, the first optical fiber ring 3 and the second optical fiber ring 5 are both shortened, and the deformation amount of the first optical fiber ring resonator and the deformation amount of the second optical fiber ring resonator are both shortened, and the deformation amount of the cavity length of the first optical fiber ring resonator and the deformation amount of the cavity of the second optical fiber ring resonator are still the same, and the cavity length of the first optical fiber ring resonator is still the same as the cavity length of the second optical fiber ring resonator; since the length of the optical fiber of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 is close to half of the cavity length of the first optical fiber ring resonator but less than half of the cavity length of the first optical fiber ring resonator, and the length of the optical fiber of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 is close to half of the cavity length of the second optical fiber ring resonator but less than half of the cavity length of the second optical fiber ring resonator, the cavity length of the first optical fiber ring resonator and the cavity length of the second optical fiber ring resonator are both obviously deformed; because the cavity length of the first optical fiber ring resonator and the cavity length of the second optical fiber ring resonator are both shortened, and the cavity length of the first optical fiber ring resonator is still the same as the cavity length of the second optical fiber ring resonator, the optical path length of light transmitted by one circle in the first optical fiber ring resonator is still equal to the optical path length of light transmitted by one circle in the second optical fiber ring resonator, so that the resonant frequency of the first optical fiber ring resonator is still the same as the resonant frequency of the second optical fiber ring resonator, but the frequency interval of adjacent resonant frequencies is increased, namely the period of the induction transparent effect transmission spectrum is increased;
in this way, the deformation of the profile can be obtained from the period of the transmission spectrum of the induced transparency effect;
the first light output end of the first optical fiber coupler 2 outputs an induction transparent effect transmission spectrum to the spectrometer 7, the spectrometer 7 collects a transmission spectrum, then the transmission spectrum is converted into a transmission spectrum voltage signal, the transmission spectrum voltage signal is sent to the processing system 8, the processing system 8 collects the transmission spectrum voltage signal, then the transmission spectrum voltage signal is filtered and subjected to data analysis to obtain a period of the transmission spectrum, and further deformation of the section bar is obtained, and finally the processing system 8 outputs a sensor output signal, wherein the sensor output signal comprises the deformation of the section bar.
The working principle of the processing system 8:
the spectrometer 7 sends the transmission spectrum voltage signal to the collection filter circuit 8-1, the collection filter circuit 8-1 collects the transmission spectrum voltage signal and filters noise on the transmission spectrum voltage signal, then sends the transmission spectrum voltage signal to the analysis output circuit 8-2, the analysis output circuit 8-2 analyzes the transmission spectrum voltage signal and obtains a period of the transmission spectrum voltage signal, then deformation of the section bar is obtained according to the period of the transmission spectrum voltage signal, and finally the analysis output circuit 8-2 outputs a sensor output signal, wherein the sensor output signal comprises the deformation of the section bar.
A measurement method of a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles, the measurement method comprising the following steps:
step 1: fixing the deformation sheet 6 on the profile;
step 2: constructing a rectangular coordinate system based on the deformation sheet 6 in the step 1;
step 3: and (3) judging the deformation of the profile based on the period of the induction transparent effect transmission spectrum based on the coordinate system of the step (2), if the period of the induction transparent effect transmission spectrum is reduced, the deformation of the profile along the x axis is performed, and if the period of the induction transparent effect transmission spectrum is increased, the deformation of the profile along the y axis is performed.
A measurement method of a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite section bar, wherein in the step 2, a rectangular coordinate system is constructed, specifically, the long edge of a deformation sheet 6 is in the x direction, and the short edge of the deformation sheet 6 is in the y direction, so that x and y form the rectangular coordinate system;
the optical fibers of the first optical fiber ring 3 fixed on the surface of the deformation sheet 6 are arranged along the x direction;
the optical fibers of the second optical fiber ring 5 fixed on the surface of the deformation sheet 6 are arranged along the x direction.
A method for measuring a high-speed strain optical fiber sensor for molding and detecting regenerated organic resin composite profiles comprises the following steps that step 3 is specifically that a first light output end of a first optical fiber coupler 2 outputs an induction transparent effect transmission spectrum to a spectrometer 7, the spectrometer 7 collects the transmission spectrum, then the transmission spectrum is converted into a transmission spectrum voltage signal, the transmission spectrum voltage signal is sent to a processing system 8, the processing system 8 collects the transmission spectrum voltage signal, then the transmission spectrum voltage signal is filtered and subjected to data analysis to obtain a transmission spectrum period, deformation of the profile is obtained, finally, the processing system 8 outputs a sensor output signal, and the sensor output signal comprises the deformation of the profile.
The deformation of the profile is obtained by sensing the period of the transmission spectrum of the transparent effect.
When the profile is shortened in the direction parallel to the long side of the deformation sheet 6, the first optical fiber ring 3 and the second optical fiber ring 5 are shortened, the deformation amount of the first optical fiber ring 3 is equal to the deformation amount of the second optical fiber ring 5, the cavity length of the first optical fiber ring resonator and the cavity length of the second optical fiber ring resonator are shortened, the deformation amount of the cavity length of the first optical fiber ring resonator is equal to the deformation amount of the cavity length of the second optical fiber ring resonator, and the period of the induction transparent effect transmission spectrum is prolonged.
When the profile is lengthened in the direction parallel to the long side of the deformation sheet 6, both the first optical fiber ring 3 and the second optical fiber ring 5 are lengthened, the deformation amount of the first optical fiber ring 3 is equal to the deformation amount of the second optical fiber ring 5, the cavity length of the first optical fiber ring resonator and the cavity length of the second optical fiber ring resonator are lengthened, the deformation amount of the cavity length of the first optical fiber ring resonator is equal to the deformation amount of the cavity length of the second optical fiber ring resonator, and the period of the induction transparent effect transmission spectrum is shortened.
When the deformation of the profile is measured, the deformation sheet 6 needs to be fixed on the profile, and only the deformation in the direction parallel to the long side of the deformation sheet 6 can be measured.
Claims (9)
1. The high-speed strain optical fiber sensor for the molding detection of the regenerated organic resin composite section bar is characterized by comprising a light source (1), a first optical fiber coupler (2), a first optical fiber ring (3), a second optical fiber coupler (4), a second optical fiber ring (5), a deformation sheet (6), a spectrometer (7) and a processing system (8);
the light output end of the light source (1) is connected with the first light input end of the first optical fiber coupler (2),
the first optical fiber ring (3) is input from the second optical input end of the first optical fiber coupler (2) and output from the second optical output end of the first optical fiber coupler (2);
the first optical fiber ring (3) is input from a first optical input end of the second optical fiber coupler (4) and output from a first optical output end of the second optical fiber coupler (4);
the second optical fiber ring (5) is input from a second optical input end of the second optical fiber coupler (4) and output from a second optical output end of the second optical fiber coupler (4);
the first optical fiber ring (3) and the second optical fiber ring (5) are fixed on the surface of the deformation sheet (6);
the first optical output end of the first optical fiber coupler (2) is connected with the optical input end of the spectrometer (7),
the electrical output end of the spectrometer (7) is connected with the electrical input end of the processing system (8), and the electrical output end of the processing system (8) outputs a sensor output signal.
2. The high-speed strain fiber optic sensor of claim 1, wherein the deformation sheet (6) is a sheet-like object, the deformation sheet (6) being a two-dimensional rectangular object; the long edge of the deformation sheet 6 is in the x direction, the short edge of the deformation sheet (6) is in the y direction,
the optical fiber of the first optical fiber ring (3) fixed on the surface of the deformation sheet (6) is along the x direction; the optical fibers of the first optical fiber ring (3) fixed on the surface of the deformation sheet (6) are perpendicular to the y direction;
the optical fiber of the second optical fiber ring (5) fixed on the surface of the deformation sheet (6) is along the x direction; the optical fiber of the second optical fiber ring (5) fixed on the surface of the deformation sheet (6) is perpendicular to the y direction;
the length of the optical fiber of the first optical fiber ring (3) fixed on the surface of the deformation sheet (6) is the same as the length of the optical fiber of the second optical fiber ring (5) fixed on the surface of the deformation sheet (6);
the optical fiber materials of the first optical fiber coupler (2), the optical fiber material of the first optical fiber ring (3), the optical fiber material of the second optical fiber coupler (4) and the optical fiber material of the second optical fiber ring (5) are the same.
3. The high-speed strain fiber optic sensor of claim 2, wherein the first fiber optic coupler (2), the first fiber optic ring (3) and the second fiber optic coupler (4) form a first fiber optic ring resonator;
the second optical fiber coupler (4) and the second optical fiber ring (5) form a second optical fiber ring resonant cavity.
4. A high-speed strain optical fiber sensor according to claim 3, characterized in that the length of the optical fiber of the first optical fiber ring (3) fixed on the surface of the deformation sheet (6) is close to half the cavity length of the first optical fiber ring resonator but less than half the cavity length of the first optical fiber ring resonator;
the length of the optical fiber of the second optical fiber ring (5) fixed on the surface of the deformation sheet (6) is close to half of the cavity length of the second optical fiber ring resonant cavity, but less than half of the cavity length of the second optical fiber ring resonant cavity;
the cavity length of the first optical fiber ring resonator is the same as that of the second optical fiber ring resonator, and the radius of the first optical fiber ring resonator is larger than that of the second optical fiber ring resonator.
5. A high-speed strain fiber optic sensor according to claim 3, wherein the first fiber optic ring cavity has a transmission of light in the first fiber optic ring cavity of approximately 1 for one revolution;
and the transmissivity of light transmitted by the second optical fiber ring resonator for one circle in the second optical fiber ring resonator is close to 1.
6. A high-speed strain fiber optic sensor according to claim 3, wherein the processing system 8 comprises an acquisition filter circuit (8-1) and an analysis output circuit (8-2);
the electric input end of the acquisition filter circuit (8-1) is the electric input end of the processing system (8), and the electric output end of the analysis output circuit (8-2) is the electric output end of the processing system (8);
the electric output end of the spectrometer (7) is connected with the electric input end of the acquisition filter circuit (8-1), the electric output end of the acquisition filter circuit (8-1) is connected with the electric input end of the analysis output circuit (8-2), and the electric output end of the analysis output circuit (8-2) outputs a sensor output signal.
7. A measurement method using the regenerated organic resin composite section bar molding detection high-speed strain optical fiber sensor according to claim 2, characterized in that the measurement method comprises the steps of:
step 1: fixing the deformation sheet (6) on the section bar;
step 2: constructing a rectangular coordinate system based on the deformation sheet (6) in the step 1;
step 3: based on the coordinate system of the step 2, judging that when the profile is deformed, if the period of the induction transparent effect transmission spectrum is smaller, the profile is shortened along the x axis, and if the period of the induction transparent effect transmission spectrum is larger, the profile is lengthened along the x axis;
the long edge of the deformation sheet (6) is arranged in the x direction, and the short edge of the deformation sheet (6) is arranged in the y direction, so that x and y form a rectangular coordinate system;
the optical fibers of the first optical fiber ring (3) fixed on the surface of the deformation sheet (6) are arranged along the x direction;
the optical fibers of the second optical fiber ring (5) fixed on the surface of the deformation sheet (6) are arranged along the x direction.
8. The measuring method according to claim 7, characterized in that the deformation of the profile in step 3 is measured only in a direction parallel to the long sides of the deformation sheet (6).
9. The method according to claim 7, wherein the step 3 is specifically that the first light output end of the first optical fiber coupler (2) outputs an induced transparency effect transmission spectrum to the spectrometer (7), the spectrometer (7) collects the transmission spectrum, then converts the transmission spectrum into a transmission spectrum voltage signal, and sends the transmission spectrum voltage signal to the processing system (8), the processing system (8) collects the transmission spectrum voltage signal, then filters and analyzes the transmission spectrum voltage signal to obtain a period of the transmission spectrum, and further obtains the deformation of the profile, and finally, the processing system (8) outputs a sensor output signal, wherein the sensor output signal includes the deformation of the profile.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002071386A (en) * | 2000-08-28 | 2002-03-08 | Mitsubishi Cable Ind Ltd | Method and device for measuring strain or the like, and laser light source |
| CN102052930A (en) * | 2010-11-24 | 2011-05-11 | 中国科学院上海光学精密机械研究所 | Fiber grating distributed strain sensor and strain monitoring method thereof |
| CN106091973A (en) * | 2016-07-05 | 2016-11-09 | 哈尔滨理工大学 | Based on annular Research on Cavity Ring Down Spectroscopy strain transducer and strain detecting method |
| CN109115118A (en) * | 2018-07-25 | 2019-01-01 | 国网河北省电力有限公司电力科学研究院 | A kind of transformer winding detection system based on distributing optical fiber sensing |
| CN109141487A (en) * | 2018-07-25 | 2019-01-04 | 国网河北省电力有限公司电力科学研究院 | A kind of distributed fiberoptic sensor |
| CN115574731A (en) * | 2022-09-23 | 2023-01-06 | 国网湖北省电力有限公司电力科学研究院 | Device and method for measuring micro-strain two-dimensional distribution on surface of lithium battery |
-
2023
- 2023-04-07 CN CN202310366079.9A patent/CN116538945B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002071386A (en) * | 2000-08-28 | 2002-03-08 | Mitsubishi Cable Ind Ltd | Method and device for measuring strain or the like, and laser light source |
| CN102052930A (en) * | 2010-11-24 | 2011-05-11 | 中国科学院上海光学精密机械研究所 | Fiber grating distributed strain sensor and strain monitoring method thereof |
| CN106091973A (en) * | 2016-07-05 | 2016-11-09 | 哈尔滨理工大学 | Based on annular Research on Cavity Ring Down Spectroscopy strain transducer and strain detecting method |
| CN109115118A (en) * | 2018-07-25 | 2019-01-01 | 国网河北省电力有限公司电力科学研究院 | A kind of transformer winding detection system based on distributing optical fiber sensing |
| CN109141487A (en) * | 2018-07-25 | 2019-01-04 | 国网河北省电力有限公司电力科学研究院 | A kind of distributed fiberoptic sensor |
| CN115574731A (en) * | 2022-09-23 | 2023-01-06 | 国网湖北省电力有限公司电力科学研究院 | Device and method for measuring micro-strain two-dimensional distribution on surface of lithium battery |
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