CN216524383U - Optical fiber code acquisition module and identification system - Google Patents
Optical fiber code acquisition module and identification system Download PDFInfo
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- CN216524383U CN216524383U CN202123090625.6U CN202123090625U CN216524383U CN 216524383 U CN216524383 U CN 216524383U CN 202123090625 U CN202123090625 U CN 202123090625U CN 216524383 U CN216524383 U CN 216524383U
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- 230000010363 phase shift Effects 0.000 claims description 2
- 238000005253 cladding Methods 0.000 abstract description 18
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Abstract
The utility model discloses an optical fiber code acquisition module and an identification system, wherein the optical fiber code acquisition module comprises: a base; the first optical fiber is provided with a fiber grating; a fixing table for fixing the first optical fiber from one side of the fiber grating; the optical fiber automatic rotating table is used for fixing the first optical fiber from the other side of the optical fiber grating and rotating according to the control instruction so as to drive the optical fiber grating to be distorted; and the spectrum sensing array corresponds to the position of the fiber bragg grating and is used for collecting light waves diffracted after the fiber bragg grating is twisted. The scheme utilizes the rotation of the optical fiber automatic rotating table to drive the optical fiber of the optical fiber grating to be twisted, and further causes the reflection change of the cladding and the fiber core refraction angle of the optical fiber position of the optical fiber grating, so that the reflected light wave of the optical fiber grating is transmitted out of the cladding from the cladding, and the transmitted light wave is collected and identified by the spectrum sensing array, thereby getting rid of the constraint of devices such as a reflector, and the structure is simple, and the cost is reduced.
Description
Technical Field
The utility model relates to the field of optical fiber communication, in particular to an optical fiber code acquisition module and an identification system.
Background
The conventional optical fiber coding identification mainly relies on a diffraction grating device to separate light waves, and the separated light waves are subjected to photoelectric conversion and collection by a photoelectric conversion array, so that the spectral identification of the optical fiber coding reflection light waves is realized. However, the diffraction grating device is expensive, needs the assistance of devices such as a reflector and the like, and has high cost and complex structure.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an optical fiber code acquisition module and an identification system, which can get rid of the constraint of devices such as a reflector and the like, and have simple structure and low cost.
According to the embodiment of the first aspect of the utility model, the optical fiber coding acquisition module comprises a base; and disposed on the base: the optical fiber grating comprises a first optical fiber and a second optical fiber, wherein the first optical fiber is provided with a fiber grating; a fixing stage for fixing the first optical fiber from one side of the fiber grating; the optical fiber automatic rotating table is used for fixing the first optical fiber from the other side of the optical fiber grating and rotating according to a control instruction so as to drive the optical fiber grating to be distorted; and the spectrum sensing array corresponds to the position of the fiber bragg grating and is used for collecting light waves diffracted after the fiber bragg grating is twisted.
According to the embodiment of the first aspect of the utility model, the optical fiber coding acquisition module has at least the following beneficial effects: the scheme utilizes the rotation of the optical fiber automatic rotating table to drive the optical fiber of the optical fiber grating to be twisted, and further causes the reflection change of the cladding and the fiber core refraction angle of the optical fiber position of the optical fiber grating, so that the reflected light wave of the optical fiber grating is transmitted out of the cladding from the cladding, and the transmitted light wave is collected and identified by the spectrum sensing array, thereby getting rid of the constraint of devices such as a reflector, and the structure is simple, and the cost is reduced.
According to some embodiments of the first aspect of the present invention, the fiber grating is a long period fiber grating, a fiber bragg grating or a phase shift fiber grating.
According to some embodiments of the first aspect of the present invention, the fixing table includes a fixing base, a fixing pressing plate, and a bolt, a screw hole is opened at a position corresponding to the fixing pressing plate of the fixing base for locking the bolt, and the first optical fiber is inserted between the fixing base and the fixing pressing plate and clamped by the bolt.
According to some embodiments of the first aspect of the present invention, the fixing base and the fixing pressure plate are provided with plastic gaskets on two opposite inner sides.
According to some embodiments of the first aspect of the present invention, the automatic fiber rotating station comprises: the stator is fixed on the base; a rotor disposed opposite to the stator in a vertical direction; the hollow rotating shaft is sleeved in the middle of the rotor, the first optical fiber penetrates through the hollow rotating shaft from the horizontal direction, and a fastening device is arranged on the hollow rotating shaft and used for fixing the other end of the first optical fiber.
According to some embodiments of the first aspect of the present invention, an end of the first optical fiber extending from the optical fiber automatic rotating table is connected with an optical fiber ring, and an optical fiber radius of the optical fiber ring is smaller than a radius of the first optical fiber.
According to some embodiments of the first aspect of the present invention, an optical fiber attenuator is attached to an end of the optical fiber loop.
According to some embodiments of the first aspect of the present invention, the spectral sensor array is formed by a plurality of photosensors arranged at a pitch.
According to the embodiment of the second aspect of the utility model, the optical fiber code identification system comprises a high-speed control processing chip, a light source, a circulator, a second optical fiber and the optical fiber code acquisition module, wherein the high-speed control processing chip, the light source, the circulator and the second optical fiber are sequentially connected, the second optical fiber is provided with an optical fiber code, the first optical fiber of the optical fiber code acquisition module and the reflection output end of the circulator are connected, and the optical fiber automatic rotating table and the spectrum sensing array of the optical fiber code acquisition module are respectively connected with the high-speed control processing chip.
The optical fiber code identification system according to the embodiment of the second aspect of the utility model has at least the following advantages: the scheme utilizes the rotation of the optical fiber automatic rotating table to drive the optical fiber of the optical fiber grating to be twisted, and further causes the reflection change of the cladding and the fiber core refraction angle of the optical fiber position of the optical fiber grating, so that the reflected light wave of the optical fiber grating is transmitted out of the cladding from the cladding, and the transmitted light wave is collected and identified by the spectrum sensing array, thereby getting rid of the constraint of devices such as a reflector, and the structure is simple, and the cost is reduced.
According to some embodiments of the second aspect of the present invention, the optical fiber code is comprised of a plurality of fiber bragg gratings of different center wavelengths or the same center wavelength.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an optical fiber encoding acquisition module according to an embodiment of the first aspect of the present invention;
FIG. 2 is a cross-sectional view of a first optical fiber according to an embodiment of the first aspect of the present invention;
FIGS. 3a, 3b, and 3c are schematic reflection spectra of a long-period fiber grating, a fiber Bragg grating, and a phase-shifted fiber grating, respectively;
FIG. 4 is a schematic view of a stationary stage according to an embodiment of the first aspect of the present invention;
FIG. 5, FIG. 6 and FIG. 7 are a front view, a side view and a top view of an automatic optical fiber rotating table, respectively;
fig. 8 is a schematic diagram of an optical fiber code identification system according to an embodiment of the second aspect of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, an optical fiber encoding collection module 100 according to an embodiment of the first aspect of the present invention includes
The base 110, the base 110 is used as a mounting platform of the device, and provides a hardware frame; and disposed on the base 110:
a first optical fiber 120, one end of which receives an input light wave containing a code value, wherein the first optical fiber 120 comprises an inner fiber core 121 and an outer cladding 122, and a fiber grating 123 is engraved on the fiber core 121, as shown in fig. 2; the fiber grating 123 is capable of reflecting the corresponding wavelength axially. When the fiber grating 123 is twisted, the refraction angle between the fiber core 121 and the cladding 122 is changed, when the refraction angle reaches a certain degree, the axially reflected light wave is transmitted out of the cladding 122 after being diffracted, the transverse diffraction is changed, and the diffraction spectrum is consistent with the reflection spectrum;
a fixing stage 130 for fixing the first optical fiber 120 from one side of the fiber grating 123;
an optical fiber automatic rotating table 140, configured to fix the first optical fiber 120 from the other side of the fiber grating 123, and rotate according to a control instruction to drive the fiber grating 123 to twist;
and the spectrum sensing array 150 corresponds to the position of the fiber grating 123 and is used for collecting light waves diffracted after the fiber grating 123 is twisted.
When input light waves containing the code values enter the first optical fiber 120, the rotation of the optical fiber automatic rotating table 140 is controlled to drive the optical fiber of the optical fiber grating 123 to be twisted, so that the refraction angle of the cladding 122 and the fiber core 121 at the position of the optical fiber where the optical fiber grating 123 is located is reflected and changed, the light waves reflected by the optical fiber grating 123 are transmitted out of the cladding 122, and the transmitted light waves are collected and identified by the spectral sensing array 150, so that the constraint of devices such as a reflector is eliminated, the structure is simple, and the cost is reduced.
In some embodiments of the first aspect of the present invention, the fiber grating 123 is a long-period fiber grating, a fiber bragg grating, or a phase-shifted fiber grating, wherein the long-period fiber grating can reflect light waves in a long wavelength band, the fiber bragg grating can reflect light waves in a narrow wavelength band, and the phase-shifted fiber grating can implement secondary wavelength reflection equally divided in a main wavelength band and a main wavelength band at two ends in one wavelength band, as shown in fig. 3a, 3b, and 3c, which are reflection spectra of the long-period fiber grating, the fiber bragg grating, and the phase-shifted fiber grating, and in view of the fact that the patent requires to reflect a relatively wider wavelength band, the long-period fiber grating is preferably used in this embodiment.
Specifically, as shown in fig. 4, in some embodiments of the first aspect of the present invention, the fixing table 130 includes a fixing base 131, a fixing pressing plate 132, and a bolt (not shown), a screw hole 133 is formed at a position of the fixing base 131 corresponding to the fixing pressing plate 132 for locking the bolt, and the first optical fiber 120 is inserted between the fixing base 131 and the fixing pressing plate 132 and clamped by the bolt, so as to mainly fix the first optical fiber 120 and facilitate twisting the first optical fiber 120.
Further, in some embodiments of the first aspect of the present invention, plastic gaskets 134 are disposed on two opposite inner sides of the fixing base 131 and the fixing pressing sheet 132, so as to fix the optical fiber and protect the optical fiber from being damaged by a clamp. The plastic washer 134 may be replaced by other flexible materials for the same fixation and protection.
As shown in fig. 5 to 7, which are a front view, a side view and a top view of the automatic optical fiber rotation stage 140, in some embodiments of the first aspect of the present invention, the automatic optical fiber rotation stage 140 includes: a stator 141 fixed to the base 110; a rotor 142 disposed to be vertically opposite to the stator 141; the hollow rotating shaft 143 is sleeved at the middle position of the rotor 142, the first optical fiber 120 penetrates through the hollow rotating shaft 143 from the horizontal direction, and a fastening device 144 is arranged on the hollow rotating shaft 143 and used for fixing the other end of the first optical fiber 120.
After the rotor 142 is energized, an electromagnetic field is generated, and the rotation is realized under the magnetic force between the stators 141, so as to drive the middle idle shaft 143 sleeved thereon to rotate, and the first optical fiber 120 can synchronously rotate with the hollow rotating shaft 143 under the action of the fastening device 144, so as to drive the fiber grating 123 to twist. It should be noted that, in order to save the mold opening cost, the fastening device 144 of the present embodiment has the same structure as the fixing table 130, that is, includes the fixing pressing plate 132, the bolt, the screw hole 133, and the like.
Further, in some embodiments of the first aspect of the present invention, an end of the first optical fiber 120 extending from the optical fiber automatic rotating table 140 is connected to an optical fiber ring 160, and an optical fiber radius of the optical fiber ring 160 is smaller than that of the first optical fiber 120, so that attenuation of an end of a light wave can be realized, and interference of reflection of the optical fiber grating 123 caused by reflection of the light wave can be avoided.
Furthermore, in some embodiments of the first aspect of the present invention, the end of the fiber loop 160 is connected to a fiber attenuator 170, which further increases the fiber attenuation on the basis of the fiber loop 160.
In some embodiments of the first aspect of the present invention, the spectrum sensor array 150 is formed by a plurality of photosensors arranged at a certain interval, so as to convert the light intensity of the light wave into an electrical signal; when the fiber grating 123 rotates to a certain position, the fiber grating 123 transmits light waves after being twisted and inputs the light waves into the spectrum sensing array 150, the fiber grating 123 can transmit the light waves with uniform spectrum through the cladding 122 and input the light waves into the spectrum sensing array 150, and different wavelengths are incident on different photoelectric sensors of the spectrum sensing array 150, so that the light wave intensity collection of different wavelengths is realized.
As shown in fig. 8, a fiber coding 510 recognition system according to a second embodiment of the present invention includes: high-speed control processing chip 200, light source 300, circulator 400, second optic fibre 500 and optic fibre code 510 collection module 100, including high-speed control processing chip 200, light source 300, circulator 400, second optic fibre 500 connect gradually, be provided with optic fibre code 510 on the second optic fibre 500, optic fibre code 510 collection module 100 first optic fibre 120 with the reflection output of circulator 400, optic fibre code 510 collection module 100's automatic platform 140, spectrum sensing array 150 that rotates of optic fibre code 510 respectively with high-speed control processing chip 200 is connected.
Since the intensity of the diffracted light wave is maximum when the twist angle reaches the critical value, the intensity of the diffracted light wave is gradually reduced when the twist angle is smaller than the critical value and exceeds the critical value. Therefore, the twist angle of the fiber grating 123 needs to be initialized and adjusted, so as to realize the maximum light intensity diffraction of the fiber grating 123; the light wave output point of the circulator 400 is an end head, and the end head can perform total reflection on all light waves. When the light source 300 sends a pulse light wave as required, the light wave is output to the tip through the circulator 400, the tip total reflection light wave is output to the optical fiber code 510 acquisition module 100 through the circulator 400, and the optical fiber code 510 acquisition module 100 acquires spectral information including wavelength and energy; the fiber code 510 acquisition module 100 rotates the rotor 142 according to a control instruction of the high-speed control processing chip 200 in a certain step to realize the distortion of the fiber grating 123, and then sends light waves and acquires spectral information; the rotor 142 is rotated and the spectral information is collected step by step until the intensity of the collected spectral information is at the maximum the optimum rotation angle, and the angle is fixed.
When the optical fiber grating light source works, the high-speed control processing chip 200 controls the light source 300 to output pulse light waves, the pulse light waves are transmitted to the optical fiber code 510 of the second optical fiber 500 through the circulator 400, the optical fiber code 510 reflects light waves containing specific wavelengths and code values and enters the optical fiber grating 123 of the first optical fiber 120 through the circulator 400, the optical fiber grating 123 is in a twisted state, and due to reflection change of refraction angles of the cladding 122 and the fiber core 121 at the position of the optical fiber where the optical fiber grating 123 is located, the reflected light waves of the optical fiber grating 123 are transmitted to the outside of the cladding 122 from the cladding 122, the transmitted light waves are collected through the spectrum sensing array 150 and then fed back to the high-speed control processing chip 200 to identify wavelengths and light intensity, so that the constraint of devices such as a reflector is eliminated, the structure is simple, and the cost is reduced.
In some embodiments of the second aspect of the present invention, the fiber code 510 is composed of a plurality of fiber bragg gratings with different central wavelengths or the same central wavelength, and can reflect light waves with corresponding wavelengths and code values.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An optical fiber coded acquisition module, comprising:
a base; and arranged on the base
The optical fiber grating comprises a first optical fiber and a second optical fiber, wherein the first optical fiber is provided with a fiber grating;
a fixing stage for fixing the first optical fiber from one side of the fiber grating;
the optical fiber automatic rotating table is used for fixing the first optical fiber from the other side of the optical fiber grating and rotating according to a control instruction so as to drive the optical fiber grating to be twisted;
and the spectrum sensing array corresponds to the position of the fiber bragg grating and is used for collecting light waves diffracted after the fiber bragg grating is twisted.
2. The fiber-optic coded acquisition module of claim 1, wherein: the fiber grating is a long-period fiber grating, a fiber Bragg grating or a phase-shift fiber grating.
3. A fiber encoded acquisition module according to claim 1 or 2, wherein: the fixing table comprises a fixing base, a fixing pressing sheet and a bolt, a screw hole is formed in the corresponding position of the fixing base and the fixing pressing sheet to lock the bolt, and the first optical fiber penetrates through the space between the fixing base and the fixing pressing sheet and is clamped under the action of the bolt.
4. A fiber encoded acquisition module according to claim 3, wherein: the two opposite inner sides of the fixed base and the fixed pressing sheet are provided with plastic gaskets.
5. An optical fiber code acquisition module according to claim 1 or 2, wherein: the automatic optical fiber rotating table comprises:
the stator is fixed on the base;
a rotor disposed opposite to the stator in a vertical direction;
the hollow rotating shaft is sleeved in the middle of the rotor, the first optical fiber penetrates through the hollow rotating shaft from the horizontal direction, and a fastening device is arranged on the hollow rotating shaft and used for fixing the other end of the first optical fiber.
6. A fiber encoded acquisition module according to claim 1 or 2, wherein: one end of the first optical fiber extending out of the optical fiber automatic rotating table is connected with an optical fiber ring, and the radius of the optical fiber ring is smaller than that of the first optical fiber.
7. The fiber-optic coded acquisition module of claim 6, wherein: the tail end of the optical fiber ring is connected with an optical fiber attenuator.
8. The fiber-optic coded acquisition module of claim 1, wherein: the spectrum sensing array is formed by arranging a plurality of photoelectric sensors at a certain interval.
9. An optical fiber code identification system, characterized by: the optical fiber code acquisition module comprises a high-speed control processing chip, a light source, a circulator, a second optical fiber and the optical fiber code acquisition module as claimed in any one of claims 1 to 8, wherein the high-speed control processing chip, the light source, the circulator and the second optical fiber are sequentially connected, an optical fiber code is arranged on the second optical fiber, a first optical fiber of the optical fiber code acquisition module and a reflection output end of the circulator are arranged, and an optical fiber automatic rotating table and a spectrum sensing array of the optical fiber code acquisition module are respectively connected with the high-speed control processing chip.
10. The fiber optic code identification system of claim 9, wherein: the optical fiber code is composed of a plurality of optical fiber Bragg gratings with different central wavelengths or the same central wavelength.
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| CN202123090625.6U CN216524383U (en) | 2021-12-09 | 2021-12-09 | Optical fiber code acquisition module and identification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117214106A (en) * | 2023-09-11 | 2023-12-12 | 无锡迅杰光远科技有限公司 | Composite spectrum acquisition system and working method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117214106A (en) * | 2023-09-11 | 2023-12-12 | 无锡迅杰光远科技有限公司 | Composite spectrum acquisition system and working method |
| CN117214106B (en) * | 2023-09-11 | 2024-03-19 | 无锡迅杰光远科技有限公司 | Composite spectrum acquisition system and working method |
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