CN111693077A - Optical fiber code identification system and method for automatically determining measurement threshold - Google Patents
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- CN111693077A CN111693077A CN202010582237.0A CN202010582237A CN111693077A CN 111693077 A CN111693077 A CN 111693077A CN 202010582237 A CN202010582237 A CN 202010582237A CN 111693077 A CN111693077 A CN 111693077A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 61
- 238000005259 measurement Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 14
- 238000001228 spectrum Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 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
- G01D5/35338—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 other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
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- 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
- G01D5/347—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 using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
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Abstract
The invention discloses an optical fiber code identification system for automatically determining a measurement threshold, which comprises: a light source module; the circulator is provided with a first port, a second port and a third port, and the first port is connected with the output end of the light source module; the input end of the optical splitter is connected with the second port of the circulator, the optical splitter is provided with a main optical splitting end and an auxiliary optical splitting end, and the main optical splitting end is used for connecting optical fibers with optical fiber codes; the reflector is connected with the secondary light splitting end of the light splitter; the input end of the waveform detector is connected with the third port of the circulator; and the main controller is electrically connected with the light source module and the waveform detector respectively. The light wave after light splitting is totally reflected by the light splitter and the reflector, the system can determine an initial light intensity threshold according to the reflected light wave and the light splitting ratio, and then the light intensity threshold of the test point on the optical fiber is calculated.
Description
Technical Field
The invention relates to the field of optical fiber communication, in particular to an optical fiber code identification system and method for automatically determining a measurement threshold value.
Background
In the field of optical fiber communication, an optical fiber code consists of a plurality of optical fiber gratings with different wavelengths, and an optical fiber code identification system is an optical detection system for accurately identifying the wavelengths of the optical fiber gratings. Because different optic fibre need the optical signal of corresponding size to detect, the output light intensity of present optical detection system relies on artifical the measuring, because optic fibre has a certain distance, artifical measuring output light intensity is not only inefficient and receive the environmental impact (like the light path structural change) and lead to the rate of accuracy not enough.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an optical fiber code identification system for automatically determining a measurement threshold, which can efficiently and accurately detect the threshold of the output light intensity of the system; the invention also provides a method for the optical fiber code recognition system to determine the measurement threshold value by itself.
According to an embodiment of the first aspect of the invention, the optical fiber code identification system for self-determining the measurement threshold comprises: the light source module is used for outputting a light wave signal for testing; the circulator is provided with a first port, a second port and a third port, and the first port is connected with the output end of the light source module; the input end of the optical splitter is connected with the second port of the circulator, the optical splitter is provided with a main light splitting end and a secondary light splitting end, and the main light splitting end is used for connecting optical fibers with optical fiber codes; the reflecting mirror is connected with the secondary light splitting end of the light splitter; the input end of the waveform detector is connected with the third port of the circulator; and the main controller is electrically connected with the light source module and the waveform detector respectively.
The optical fiber code identification system for self-determining the measurement threshold according to the first embodiment of the invention has at least the following beneficial effects: the system can determine an initial light intensity threshold according to the reflected light wave and the light splitting ratio, and then calculate the light intensity threshold of the test point on the optical fiber.
According to some embodiments of the first aspect of the present invention, the light source module comprises a driver capable of adjusting an output current and a light source driven by the driver, and the driver is electrically connected to the main controller.
According to some embodiments of the first aspect of the present invention, the light source employs a narrow bandwidth light source or a pulsed light source.
According to some embodiments of the first aspect of the present invention, the light source module further includes a first SOA optical switch electrically connected to the main controller, the first SOA optical switch is connected between the light source and the first port of the circulator, and the light source is a high bandwidth light source; and a second SOA optical switch is arranged between the input end of the waveform detector and the third port of the circulator and is electrically connected with the main controller.
According to some embodiments of the first aspect of the present invention, the splitting ratio of the primary splitting end to the secondary splitting end of the splitter is 99: 1.
According to some embodiments of the first aspect of the present invention, the waveform detector employs a demodulator for achieving separation and wavelength measurement of light waves.
According to some embodiments of the first aspect of the present invention, the master controller is an FPGA controller.
According to the second aspect of the invention, the method for self-determining the measurement threshold value by the optical fiber code identification system comprises the following steps: the light wave output is divided into two paths by using a light splitter, wherein one path of light wave output is output to an optical fiber with optical fiber coding, and the other path of light wave output is output to a reflector; collecting the intensity of the light wave signal reflected by the reflector, and calculating the initial light wave signal intensity according to the light splitting output proportion of the light splitter; and calculating the threshold value of the optical fiber measuring point by using the initial light wave signal intensity and the attenuation coefficient of the optical fiber, wherein the attenuation coefficient is determined by the material of the optical fiber and the length of the optical fiber.
The method for self-determining the measurement threshold value by the optical fiber code identification system according to the second embodiment of the invention has at least the following advantages: the system can determine an initial light intensity threshold according to the reflected light wave and the light splitting ratio, and then calculate the light intensity threshold of the test point on the optical fiber.
According to some embodiments of the second aspect of the present invention, collecting the intensity of the lightwave signal reflected by the mirror comprises: acquiring a reflected continuous spectrum; determining the position of the light wave signal reflected by the reflector from the continuous spectrum; and acquiring the intensity of the light wave signal at the position of the light wave signal reflected by the reflector.
According to some embodiments of the second aspect of the present invention, the threshold F1 of the fiber measurement point is F0/(10^ (r/10)), where F0 is defined as the initial lightwave signal strength and r is the attenuation coefficient of the fiber.
Additional aspects and advantages of the invention 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 invention.
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 diagram of an optical fiber encoding identification system according to an embodiment of the first aspect of the present invention;
FIG. 2 is a flow chart of a method for self-determining a measurement threshold value by a fiber code identification system according to a second aspect of the present invention;
FIG. 3 is a spectrum diagram of the reflection position of the mirror according to the embodiment of the second aspect of the present invention;
FIG. 4 is a graph of a spectrum of encoded reflection positions of an optical fiber according to an embodiment of the second aspect of the present invention.
Reference numerals:
the light source module 100, the driver 110, the light source 120, the first SOA optical switch 130, and the second SOA optical switch 140;
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 code identification system for self-determining a measurement threshold according to an embodiment of a first aspect of the present disclosure includes: a light source module 100 for outputting a light wave signal for testing; a circulator 200, the circulator 200 having a first port, a second port, and a third port, the first port being connected to an output terminal of the light source module 100; the input end of the optical splitter 300 is connected with the second port of the circulator 200, the optical splitter 300 is provided with a main light splitting end and a secondary light splitting end, and the main light splitting end is used for connecting an optical fiber 500 with the optical fiber code 400; a reflecting mirror 600 connected to the sub-splitting end of the splitter 300; the input end of the waveform detector 700 is connected with the third port of the circulator 200; the main controller 800 is electrically connected to the light source module 100 and the waveform detector 700, respectively.
The working process is that the main controller 800 controls the light source module 100 to output a light wave signal, the light wave signal enters through the first port of the circulator 200, the light wave signal is output to the optical splitter 300 through the second port, most of the input light wave is output to the optical fiber 500 with the optical fiber code 400 from the main light splitting end by the optical splitter 300 according to a preset proportion, a small part of the input light wave is totally reflected by the reflector, and the reflected light wave is sequentially reflected by the optical splitter 300, the second port of the circulator 200 and the third end of the circulator 200 and enters the waveform detector 700 from the main controller port, the waveform detector 700 can detect the reflected light wave and feed the reflected light wave back to the main controller 800 to determine an initial light intensity threshold according to the light splitting proportion, and then the light intensity.
As described above, according to the optical fiber code recognition system for automatically determining a measurement threshold in the first embodiment of the present invention, a total reflection point is formed by using the optical splitter and the reflecting mirror, the split light wave is totally reflected, the system can determine an initial light intensity threshold according to the reflected light wave and the splitting ratio, and further calculate the light intensity threshold of the test point on the optical fiber.
In some embodiments of the first aspect of the present invention, the light source module 100 includes a driver 110 capable of adjusting an output current and a light source 120 driven by the driver 110, the driver 110 is electrically connected to the main controller 800, the driver 110 supplies power to the light source, and the driver 110 is controlled by the main controller 800, and controls the output current thereof according to the calculated light intensity threshold of the test point on the optical fiber, thereby controlling the light intensity emitted by the light source 120.
In some embodiments of the first aspect of the present invention, the light source 120 is a narrow bandwidth light source or a pulsed light source.
In view of the larger wavelength band required by the optical fiber coding, in some embodiments of the first aspect of the present invention, the optical source module 100 further includes a first SOA optical switch 130 electrically connected to the main controller 800, where the first SOA optical switch 130 is connected between the optical source 120 and the first port of the circulator 200; a second SOA optical switch 140 is arranged between the input end of the waveform detector 700 and the third port of the circulator 200, and the second SOA optical switch 140 is electrically connected with the main controller 800.
The first SOA optical switch 130, the second SOA optical switch 140 and other two SOA optical switches have high-speed on and off functions, and simultaneously have a light wave amplification function. The two SOAs form pulse control of light wave sending and receiving, so that the light wave is input into the optical fiber, the optical fiber is connected to reflect and scatter the light wave, and the light intensity transmission distance is obtained by multiplying the opening and closing time difference between the two by the light speed.
In some embodiments of the first aspect of the present invention, the splitting ratio of the primary splitting end to the secondary splitting end of the splitter 300 is 99: 1. The splitter 300 allows for the distribution of light wave energy, preferably 99:1 splitter, 99% output into fiber 500, and 1% intensity output into mirror 600.
In some embodiments of the first aspect of the present invention, the waveform detector 700 preferably employs a demodulator for achieving separation and wavelength measurement of light waves.
In some embodiments of the first aspect of the present invention, the main controller 800 is preferably an FPGA controller.
As shown in fig. 2, the method for self-determining the measurement threshold for the fiber code identification system according to the second aspect of the present invention includes the following steps: the light wave output is divided into two paths by using a light splitter, wherein one path of light wave output is output to an optical fiber with optical fiber coding, and the other path of light wave output is output to a reflector; collecting the intensity of the light wave signal reflected by the reflector, and calculating the initial light wave signal intensity according to the light splitting output proportion of the light splitter; and calculating the threshold value of the optical fiber measuring point by using the initial light wave signal intensity and the attenuation coefficient of the optical fiber, wherein the attenuation coefficient is determined by the material and the length of the optical fiber.
According to the scheme, manual participation is not needed, the measurement threshold can be determined by the system, the detection efficiency is high, and the influence of environmental factors on the detection precision can be avoided.
In some embodiments of the second aspect of the present invention, collecting the intensity of the lightwave signal reflected by the mirror comprises: acquiring a reflected continuous spectrum; determining the position of the light wave signal reflected by the reflector from the continuous spectrum, as shown in FIG. 3; and acquiring the intensity of the light wave signal at the position of the light wave signal reflected by the reflector.
In some embodiments of the second aspect of the present invention, the threshold F1 of the fiber measurement point (e.g., the continuum of fiber codes as shown in fig. 4, where the fiber codes are composed of fiber gratings with different wavelengths) is F0/(10^ (r/10)), where F0 is defined as the initial optical signal strength and r is the attenuation coefficient of the fiber.
In some embodiments of the second aspect of the present invention, the wavelength encoded by the grating may also be determined by performing peak seeking in the continuous spectrum of the grating based on the initial lightwave signal intensity F0.
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 invention. 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 invention 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 invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An optical fiber code identification system for self-determining a measurement threshold, comprising: the method comprises the following steps:
a light source module (100) for outputting a light wave signal for testing;
a circulator (200), wherein the circulator (200) is provided with a first port, a second port and a third port, and the first port is connected with the output end of the light source module (100);
an optical splitter (300), an input end of the optical splitter (300) is connected with the second port of the circulator (200), the optical splitter (300) is provided with a main splitting end and a secondary splitting end, and the main splitting end is used for connecting an optical fiber (500) with an optical fiber code (400);
a reflector (600) connected to the secondary splitting end of the splitter (300);
the input end of the waveform detector (700) is connected with the third port of the circulator (200);
and the main controller (800) is electrically connected with the light source module (100) and the waveform detector (700) respectively.
2. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the light source module (100) comprises a driver (110) capable of adjusting output current and a light source (120) driven by the driver (110), wherein the driver (110) is electrically connected with the main controller (800).
3. The fiber-optic coded identification system for self-determining a measurement threshold of claim 2, wherein: the light source (120) adopts a narrow-bandwidth light source or a pulse light source.
4. The fiber-optic coded identification system for self-determining a measurement threshold of claim 2, wherein: the light source module (100) further comprises a first SOA optical switch (130) electrically connected with the main controller (800), the first SOA optical switch (130) is connected between the light source (120) and the first port of the circulator (200), and the light source (120) adopts a high-bandwidth light source; and a second SOA optical switch (140) is arranged between the input end of the waveform detector (700) and the third port of the circulator (200), and the second SOA optical switch (140) is electrically connected with the main controller (800).
5. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the light splitting ratio of the main light splitting end and the auxiliary light splitting end of the light splitter (300) is 99: 1.
6. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the waveform detector (700) adopts a demodulator for realizing the separation of light waves and the measurement of wavelengths.
7. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the main controller (800) adopts an FPGA controller.
8. A method for self-determining a measurement threshold value by an optical fiber code identification system is characterized by comprising the following steps: comprises the following steps
The light wave output is divided into two paths by using a light splitter, wherein one path of light wave output is output to an optical fiber with optical fiber coding, and the other path of light wave output is output to a reflector;
collecting the intensity of the light wave signal reflected by the reflector, and calculating the initial light wave signal intensity according to the light splitting output proportion of the light splitter;
and calculating the threshold value of the optical fiber measuring point by using the initial light wave signal intensity and the attenuation coefficient of the optical fiber, wherein the attenuation coefficient is determined by the material of the optical fiber and the length of the optical fiber.
9. The method for self-determining the measurement threshold of the fiber code identification system according to claim 8, wherein: collecting the intensity of the light wave signal reflected by the reflector comprises:
acquiring a reflected continuous spectrum;
determining the position of the light wave signal reflected by the reflector from the continuous spectrum;
and acquiring the intensity of the light wave signal at the position of the light wave signal reflected by the reflector.
10. The method for self-determining the measurement threshold of the fiber code identification system according to claim 8 or 9, wherein: and the threshold value F1 of the optical fiber measuring point is F0/(10^ (r/10)), wherein F0 is defined as the initial lightwave signal intensity, and r is the attenuation coefficient of the optical fiber.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787715A (en) * | 2021-01-05 | 2021-05-11 | 中山水木光华电子信息科技有限公司 | Method and system for identifying optical fiber codes with different reflectivities |
| CN114040550A (en) * | 2021-11-04 | 2022-02-11 | 中山水木光华电子信息科技有限公司 | Light intensity adjusting method and system |
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2020
- 2020-06-23 CN CN202010582237.0A patent/CN111693077A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787715A (en) * | 2021-01-05 | 2021-05-11 | 中山水木光华电子信息科技有限公司 | Method and system for identifying optical fiber codes with different reflectivities |
| CN112787715B (en) * | 2021-01-05 | 2022-03-15 | 中山水木光华电子信息科技有限公司 | Method and system for identifying optical fiber codes with different reflectivities |
| CN114040550A (en) * | 2021-11-04 | 2022-02-11 | 中山水木光华电子信息科技有限公司 | Light intensity adjusting method and system |
| CN114040550B (en) * | 2021-11-04 | 2023-09-29 | 中山水木光华电子信息科技有限公司 | Light intensity adjusting method and system |
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