CN216531331U - Optical fiber coding identification and communication integrated system - Google Patents
Optical fiber coding identification and communication integrated system Download PDFInfo
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- CN216531331U CN216531331U CN202122468107.7U CN202122468107U CN216531331U CN 216531331 U CN216531331 U CN 216531331U CN 202122468107 U CN202122468107 U CN 202122468107U CN 216531331 U CN216531331 U CN 216531331U
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Abstract
The utility model discloses an optical fiber coding identification and communication integrated system and a control method, wherein the system comprises: the optical fiber coding device comprises a first optical fiber and a second optical fiber, wherein optical fiber codes are arranged on the first optical fiber and the second optical fiber, and the optical fiber codes consist of a plurality of optical fiber gratings with different intervals; first terminal and second terminal, first terminal and second terminal all include main control unit, a narrowband light source for sending optic fibre coding light wave and communication light wave, the circulator, optic fibre coding APD photoelectric conversion unit, an amplifier, the high-speed AD sampling unit of optic fibre coding, communication APD photoelectric conversion unit, the high-speed AD sampling unit of communication, this scheme utilizes the narrowband light source, simultaneously for optic fibre coding collection discernment and optic fibre communication provide same light source, through setting up two optic fibre and optic fibre coding APD photoelectric conversion unit of taking the optic fibre coding, modules such as amplifier, can realize that optic fibre communication normal operating and optic fibre coding gather simultaneously, the cost problem of traditional disconnect-type operation structure has been practiced thrift.
Description
Technical Field
The utility model relates to the field of optical fiber communication, in particular to an optical fiber code identification and communication integrated system.
Background
The existing optical fiber code recognition device and the optical fiber communication device adopt a separation type operation, and a wavelength division multiplexer, a light splitter or an optical switch is adopted to realize the optical fiber code acquisition recognition and the optical fiber communication on the same optical fiber. The method has the cost and extra attenuation brought by using a wavelength division multiplexer, a light splitter or an optical switch, and is not beneficial to practical application.
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 identification and communication integrated system, which is a cost-saving method for rapidly realizing optical fiber code acquisition and identification under the condition of ensuring normal operation of optical fiber communication.
According to an embodiment of the first aspect of the utility model, an optical fiber code identification and communication integrated system comprises: the optical fiber coding device comprises a first optical fiber and a second optical fiber, wherein optical fiber codes are arranged on the first optical fiber and the second optical fiber, and the optical fiber codes consist of a plurality of optical fiber gratings with different intervals; the optical fiber coding APD photoelectric conversion unit, the amplifier, the optical fiber coding high-speed AD sampling unit, the communication APD photoelectric conversion unit and the communication high-speed AD sampling unit are sequentially connected with a second port of the circulator, and the communication APD photoelectric conversion unit, the communication high-speed AD sampling unit and the main controller are sequentially connected with each other; wherein the third port of the circulator of the first terminal is connected with the communication APD photoelectric conversion unit of the second terminal through the first optical fiber, and the third port of the circulator of the second terminal is connected with the communication APD photoelectric conversion unit of the first terminal through the second optical fiber; the fiber gratings are consistent with the central wavelength of the narrow-band light source.
The optical fiber code identification and communication integrated system according to the first embodiment of the utility model has at least the following beneficial effects: this scheme utilization narrowband light source simultaneously for optic fibre code is gathered discernment and fiber communication provides same light source, through setting up modules such as two optic fibres of taking the optic fibre code and optic fibre code APD photoelectric conversion unit, amplifier, the high-speed AD sampling unit of optic fibre code, communication APD photoelectric conversion unit, the high-speed AD sampling unit of communication, can realize that optic fibre communication normal operating and optic fibre code gather simultaneously, has practiced thrift the cost problem of traditional disconnect-type operation structure.
According to some embodiments of the first aspect of the present invention, the 3dB bandwidth of the fiber grating ranges from 3dB bandwidth of the narrowband optical source (1/2) to 3dB bandwidth of the narrowband optical source (2/3).
According to some embodiments of the first aspect of the present invention, the maximum reflectivity w of the fiber grating is (i/(10 × log (P))) (e0+ e1), where P is the luminous intensity of the narrowband light source, i is the fiber communication energy range of the first and second terminals, e0 is the fiber grating number in the fiber code, and e1 is the fiber code maximum data between the first and second terminals.
According to some embodiments of the first aspect of the present invention, a minimum spacing L between the fiber gratings in the fiber code is M/((t1 × 2)/4), where t1 is a fiber coded light wave transmitted by the narrowband light source, M is a conversion frequency of the fiber coded APD photoelectric conversion unit, and a sampling frequency N of the fiber coded high-speed AD sampling unit is greater than M/4.
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 diagram of an integrated optical fiber encoding identification and communication system according to an embodiment of the first aspect of the present invention;
FIG. 2 is a flowchart of an integrated control method for optical fiber code identification and communication according to an embodiment of the second aspect of the present invention;
FIG. 3 is a diagram of communication lightwave pulses according to an embodiment of the present invention;
FIG. 4 is a diagram of an optical fiber coded light wave pulse according to an embodiment of the present invention.
Reference numerals:
a first optical fiber 100, a second optical fiber 200, an optical fiber code 101;
the system comprises a first terminal 300, a second terminal 400, a main controller 301, a narrow-band light source 302, a circulator 303, an optical fiber coding APD photoelectric conversion unit 304, an amplifier 305, an optical fiber coding high-speed AD sampling unit 306, a communication APD photoelectric conversion unit 307 and a communication high-speed AD sampling unit 308.
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 coding identification and communication integrated system according to an embodiment of a first aspect of the present disclosure includes:
the optical fiber comprises a first optical fiber 100 and a second optical fiber 200, wherein optical fiber codes 101 are arranged on the first optical fiber 100 and the second optical fiber 200, the optical fiber codes 101 are composed of a plurality of optical fiber gratings with different intervals, and the optical fiber gratings are solidified and re-engraved on the optical fibers;
the system comprises a first terminal 300 and a second terminal 400, wherein the first terminal 300 and the second terminal 400 have the same structure and are a transmitting end and a receiving end, and both comprise a main controller 301, a narrow-band light source 302 for sending optical fiber coded light waves and communication light waves, a circulator 303, an optical fiber coded APD photoelectric conversion unit 304, an amplifier 305, an optical fiber coded high-speed AD sampling unit 306, a communication APD photoelectric conversion unit 307 and a communication high-speed AD sampling unit 308; the main controller 301 preferably adopts an FPGA control chip, the narrowband light source 302 is connected between the main controller 301 and the first port of the circulator 303, and the main controller 301 can output a driving signal to control the narrowband light source 302 to emit an optical fiber coded light wave and a communication light wave; a second port of the circulator 303 is sequentially connected with an optical fiber coding APD photoelectric conversion unit 304, an amplifier 305, an optical fiber coding high-speed AD sampling unit 306 and a main controller 301, and the link is used for receiving reflected light ray coding light waves; the communication APD photoelectric conversion unit 307, the communication high-speed AD sampling unit 308 and the main controller 301 are sequentially connected, and the link is used for receiving communication light waves sent by the opposite side terminal;
the third port of the circulator 303 of the first terminal 300 is connected with the communication APD photoelectric conversion unit 307 of the second terminal 400 through the first optical fiber 100, the third port of the circulator 303 of the second terminal 400 is connected with the communication APD photoelectric conversion unit 307 of the first terminal 300 through the second optical fiber 200, and the two terminals are connected into a symmetrical integrated system through two optical fibers; the central wavelengths of the fiber gratings are consistent with that of the narrow-band light source 302, so that the fiber coded light wave and the communication light wave can share the narrow-band light source 302, on one hand, when the light wave of the narrow-band light source 302 is input to the fiber code 101 through the circulator 303, the fiber code 101 reflects corresponding light intensity according to the reflectivity of the fiber code, the main controller 301 of the first terminal 300/the second terminal 400 collects the light intensity and the distance reflected by the fiber code 101, and the adjacent distance between the fiber gratings in the fiber code 101 is calculated to analyze the code value, the energy and the distance of the fiber code 101; on the other hand, the unreflected light waves are transmitted to the main controller 301 on the opposite side through the communication APD photoelectric conversion unit 307 and the communication high-speed AD sampling unit 308, and the data information of the communication can be analyzed.
As described above, in this embodiment, the narrow-band light source 302 is used to provide the same light source for fiber code acquisition and identification and fiber communication at the same time, and by providing two fibers with the fiber codes 101, and modules such as the fiber code APD photoelectric conversion unit 304, the amplifier 305, the fiber code high-speed AD sampling unit 306, the communication APD photoelectric conversion unit 307, and the communication high-speed AD sampling unit 308, the normal operation of fiber communication and the simultaneous acquisition of the fiber codes 101 can be realized, so that the cost problem of the conventional split operation structure is solved.
In some embodiments of the first aspect of the present invention, the 3dB bandwidth of the fiber grating ranges from 3dB bandwidth (1/2) of the narrowband light source 302 to 3dB bandwidth (2/3) of the narrowband light source 302, and the interval is designed to ensure that the spectrum of the narrowband light source covers the spectrum of the fiber grating, thereby achieving stable identification of the fiber grating.
In some embodiments of the first aspect of the present invention, the maximum reflectivity w of the fiber grating is (i/(10 × log (P))) (e0+ e1), which enables stable identification of a plurality of fiber gratings with the same central wavelength concatenated on a fiber, where P is the light intensity of the narrowband light source 302, i is the fiber communication energy range of the first terminal 300 and the second terminal 400, e0 is the number of fiber gratings in the fiber code 101, and e1 is the maximum data of the fiber code 101 between the first terminal 300 and the second terminal 400.
Further, in some embodiments of the first aspect of the present invention, a minimum distance L between the fiber gratings in the fiber code 101 is M/((t1 × 2)/4), which can achieve effective energy discrimination of the fiber gratings in the fiber code, and avoid that an excessive pulse directly covers multiple fiber gratings, where t1 is the fiber coded light wave sent by the narrowband light source 302, M is the conversion frequency of the fiber coded APD photoelectric conversion unit 304, and the sampling frequency N of the fiber coded high-speed AD sampling unit 306 is greater than M/4.
As shown in fig. 2, an optical fiber code identification and communication integration control method according to an embodiment of a second aspect of the present disclosure is applied to the above optical fiber code identification and communication integration system, and includes the following steps:
the main controller 301 of the first terminal 300/the second terminal 400 on one side controls the narrow-band light source 302 to transmit the optical fiber coded light wave and the communication light wave according to the communication protocol;
the optical fiber coding APD photoelectric conversion unit 304 acquires the optical fiber coding light wave reflected by the optical fiber end of the circulator 303 and performs photoelectric conversion, and the amplifier 305 amplifies the converted electric signal and outputs the amplified electric signal to the optical fiber coding high-speed AD sampling unit 306;
the optical fiber coding high-speed AD sampling unit 306 feeds the collected electric signal back to the main controller 301, and the main controller 301 analyzes the optical fiber coding value;
the communication APD photoelectric conversion unit 307 acquires the communication lightwave transmitted by the opposite side second terminal 400/first terminal 300, converts the communication lightwave signal into an electrical signal and outputs the electrical signal to the communication high-speed AD sampling unit 308;
the communication high-speed AD sampling unit 308 feeds back the acquired electrical signal to the main controller 301, and the main controller 301 analyzes the data information.
In some embodiments of the second aspect of the present invention, the pulse width of the optical fiber coded light wave is t1, the pulse width of the communication light wave is t0, and t0 is less than t1/2, which facilitates the main controller 301 at the light receiving side to determine whether to emit light through optical fiber communication or light through optical fiber code collection and identification according to the pulse width. The FPGA control chip sends an optical fiber communication pulse driving signal to a narrow-band light source 302, the narrow-band light source 302 sends a continuous optical fiber communication pulse light wave according to the driving signal, wherein the optical fiber communication pulse light wave is a 0, 1 structure and takes t0 time interval as coded communication light wave, the light wave is reflected at an optical fiber end of a circulator 303, the reflected light wave is collected and converted into an electric signal by optical fiber coding APD photoelectric conversion, and then the electric signal is recorded and amplified by an amplifier 305 and collected by an optical fiber coding high-speed AD sampling unit 306, wherein the light wave reflected by the optical fiber end presents pulse width from t0 to t0 x 2, and the pulse interval is less than t0 x 14 x 2 (since the optical fiber communication pulse driving signal of the embodiment adopts 16-system, the 16-0 and 1 components, namely the light pulse width is 16 t0, the light pulse presents 2 times of reflected light when the light pulse passes through the optical fiber coding 101, considering that the energy of each of the front and back 1 t0 pulse is weaker, the energy is t0(16-2), therefore, the FPGA control chip judges whether the acquired data is optical fiber coding information or not according to the characteristics.
In some embodiments of the second aspect of the present invention, the optical fiber encodes a light wave to transmit a time pulse of k × t1 once and then waits for an integration time t2, k is a pulse coefficient, k has a value ranging from 1 to 1000, and the integration time t2 is ((measured fiber length × group refractive index)/optical speed) + an additional time, wherein the additional time is 10 × k × t1, and the integration time and the additional time are both to avoid interference of the light wave reflected in the optical fiber with the collected light wave, and the integration time and the additional time can realize the extinction of the reflected light of the light wave in the optical fiber. Specifically, the FPGA control chip sends an optical fiber code acquisition pulse driving signal to the narrowband light source 302, the narrowband light source 302 sends a pulse light wave according to the driving signal and then waits for the integration time t2, the light wave enters the optical fiber through the circulator 303, the optical fiber can generate backscattering and reflection, meanwhile, the optical fiber code 101 can also generate reflection, the reflected light is transmitted to the optical fiber code APD photoelectric conversion unit 304 through the circulator 303 to be acquired and converted into an electric signal, and then the electric signal is recorded and amplified through the amplifier 305 and acquired by the optical fiber code high-speed AD sampling unit 306, the FPGA control chip acquires an acquired data signal, carries out peak searching on the acquired data, calculates the distance length between peak values, and releases a corresponding optical fiber code value.
In addition, the optical fiber code value recorded each time comprises a code value, energy and distance, and is compared with the first recorded data to judge whether the optical fiber code 101 is interrupted or not and judge whether the energy of the optical fiber code 101 changes or not.
Further, since the collected light wave energy exceeds the collection thresholds of the APD photoelectric conversion unit 304 and the AD sampling unit 306, the energy may have a flat top phenomenon on the top of the waveform, and the energy may have distortion, so that it is necessary to fit the peak energy, in some embodiments of the second aspect of the present invention, the main controller 301 performs peak energy fitting on the collected electrical signal by the AD sampling unit 306 before analyzing the fiber code value, and the fitted peak energy is 65535 ^ 10 ((explosion number-1) × explosion coefficient/10) + ((explosion number of previous pixel energy + explosion number of next pixel energy)/2- (start point energy + end point energy))/2), where the explosion coefficient is default to 1.
In some embodiments of the second aspect of the present invention, before the main controller 301 analyzes the optical fiber code value, the light code bandwidth identification is required, only data within a preset light code bandwidth range is retained, and if the data exceeds the preset light code bandwidth range, the data is discarded; before the main controller 301 analyzes the data information, the communication bandwidth identification is required, only the data within the preset communication bandwidth range is reserved and analyzed according to the pulse interval width, and if the data information exceeds the preset communication bandwidth range, the data information is discarded.
In some embodiments of the second aspect of the present invention, the predetermined light encoding bandwidth range is: the bandwidth is greater than t1- (t0 × 0.1), and the preset communication bandwidth range is as follows: t 0+ (t0 × 0.1), where 0.1 is the optimal value obtained in actual studies.
In summary, the scheme uses the narrow-band light source 302 to provide the same light source for the optical fiber code acquisition identification and the optical fiber communication, and controls and identifies the optical fiber code and the communication light wave by arranging two optical fibers with the optical fiber code 101, the optical fiber code APD photoelectric conversion unit 304, the amplifier 305, the optical fiber code high-speed AD sampling unit 306, the communication APD photoelectric conversion unit 307, the communication high-speed AD sampling unit 308 and other modules, and combining the time division technical means, so that the normal operation of the optical fiber communication and the simultaneous acquisition of the optical fiber code 101 can be realized, and the cost problem of the traditional separated operation structure is solved.
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 (4)
1. An optical fiber code identification and communication integrated system is characterized in that: comprises that
The optical fiber coding device comprises a first optical fiber and a second optical fiber, wherein optical fiber codes are arranged on the first optical fiber and the second optical fiber, and the optical fiber codes consist of a plurality of optical fiber gratings with different intervals;
the optical fiber coding APD photoelectric conversion unit, the amplifier, the optical fiber coding high-speed AD sampling unit, the communication APD photoelectric conversion unit and the communication high-speed AD sampling unit are sequentially connected with a second port of the circulator, and the communication APD photoelectric conversion unit, the communication high-speed AD sampling unit and the main controller are sequentially connected with each other;
wherein the third port of the circulator of the first terminal is connected with the communication APD photoelectric conversion unit of the second terminal through the first optical fiber, and the third port of the circulator of the second terminal is connected with the communication APD photoelectric conversion unit of the first terminal through the second optical fiber; the fiber gratings are consistent with the central wavelength of the narrow-band light source.
2. The integrated fiber code identification and communication system according to claim 1, wherein: the 3dB bandwidth of the fiber grating ranges from 3dB bandwidth of the narrowband optical source (1/2) to 3dB bandwidth of the narrowband optical source (2/3).
3. The fiber-optic code identification and communication integration system according to claim 1 or 2, wherein: the maximum reflectivity w of the fiber grating is (i/(10 × log (P))) (e0+ e1), wherein P is the luminous intensity of the narrow-band light source, i is the fiber communication energy range of the first terminal and the second terminal, e0 is the number of the fiber gratings in the fiber code, and e1 is the maximum data of the fiber code between the first terminal and the second terminal.
4. The integrated fiber code identification and communication system according to claim 1, wherein: and the minimum spacing L between the fiber gratings in the fiber code is M/((t1 x 2)/4), wherein t1 is the fiber code light wave sent by the narrow-band light source, M is the conversion frequency of the fiber code APD photoelectric conversion unit, and the sampling frequency N of the fiber code high-speed AD sampling unit is greater than M/4.
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| CN113904730A (en) * | 2021-10-13 | 2022-01-07 | 中山水木光华电子信息科技有限公司 | Optical fiber code identification and communication integrated system and control method |
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| CN113904730A (en) * | 2021-10-13 | 2022-01-07 | 中山水木光华电子信息科技有限公司 | Optical fiber code identification and communication integrated system and control method |
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