CN216531331U - Optical fiber coding identification and communication integrated system - Google Patents

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

An integrated system of optical fiber code identification and communication

technical field

The utility model relates to the field of optical fiber communication, in particular to an optical fiber coding identification and communication integrated system.

Background technique

The existing optical fiber coding identification device and the optical fiber communication device are operated separately, and a wavelength division multiplexer, an optical splitter or an optical switch is used to realize the optical fiber coding acquisition and identification and optical fiber communication on the same optical fiber. This method has the cost and extra loss caused by using a wavelength division multiplexer, an optical splitter or an optical switch, which is not conducive to practical application.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model proposes an optical fiber code identification and communication integrated system, which can quickly realize the cost-saving method of optical fiber code acquisition and identification under the condition of ensuring the normal operation of optical fiber communication.

An optical fiber code identification and communication integrated system according to the embodiment of the first aspect of the present utility model includes: a first optical fiber and a second optical fiber, and the first optical fiber and the second optical fiber are both provided with an optical fiber code, and the optical fiber The code is composed of multiple fiber gratings with different spacings; a first terminal and a second terminal, both of which include a main controller, a narrow-band light source for sending fiber-encoded light waves and communication light waves, a circulator, Optical fiber coding APD photoelectric conversion unit, amplifier, fiber coding high-speed AD sampling unit, communication APD photoelectric conversion unit, communication high-speed AD sampling unit, the narrowband light source is connected between the main controller and the first port of the circulator , the second port of the circulator is connected to the optical fiber coding APD photoelectric conversion unit, the amplifier, the optical fiber coding high-speed AD sampling unit, and the main controller in turn, and the communication APD photoelectric conversion unit, the communication high-speed AD sampling unit, and the main controller are connected in turn ; 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 circulator of the second terminal is connected through the first optical fiber. The third port is connected with the communication APD photoelectric conversion unit of the first terminal through the second optical fiber; the center wavelengths of the plurality of fiber gratings and the narrow-band light source are consistent.

According to an integrated system of optical fiber code identification and communication according to the first embodiment of the present invention, at least the following beneficial effects are obtained. Optical fiber encoded optical fiber and optical fiber encoded APD photoelectric conversion unit, amplifier, optical fiber encoding high-speed AD sampling unit, communication APD photoelectric conversion unit, communication high-speed AD sampling unit and other modules can realize the normal operation of optical fiber communication and the simultaneous acquisition of optical fiber encoding, saving traditional Cost issues with split operating structures.

According to 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 to 3db bandwidth*(2/3) of the narrowband light source.

According to some embodiments of the first aspect of the present invention, the maximum reflectivity of the fiber grating w=(i/(10*LOG(P)))^(e0+e1), where P is the Luminous intensity, i is the optical fiber communication energy range of the first terminal and the second terminal, e0 is the number of fiber gratings in the optical fiber encoding, e1 is the maximum data of the optical fiber encoding between the first terminal and the second terminal.

According to some embodiments of the first aspect of the present invention, the minimum spacing between the fiber gratings in the fiber code is L=M/((t1*2)/4), where t1 is the fiber sent by the narrowband light source Coded light wave, M is the conversion frequency of the optical fiber encoding APD photoelectric conversion unit, and the sampling frequency N of the optical fiber encoding high-speed AD sampling unit is greater than M/4.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic diagram of an integrated system of optical fiber code identification and communication according to an embodiment of the first aspect of the present utility model;

Fig. 2 is the flow chart of the optical fiber code identification and communication integrated control method of the embodiment of the second aspect of the present utility model;

Fig. 3 is the communication light wave pulse diagram of the embodiment of the utility model;

FIG. 4 is a pulse diagram of an optical fiber coded light wave according to an embodiment of the present invention.

Reference number:

a first optical fiber 100, a second optical fiber 200, and an optical fiber code 101;

The first terminal 300, the second terminal 400, the main controller 301, the narrowband light source 302, the circulator 303, the optical fiber encoding APD photoelectric conversion unit 304, the amplifier 305, the optical fiber encoding high-speed AD sampling unit 306, the communication APD photoelectric conversion unit 307, the communication High-speed AD sampling unit 308 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present utility model, it should be understood that the orientation descriptions related to orientations, such as up, down, front, rear, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings, only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

Referring to FIG. 1 , an integrated system for optical fiber code identification and communication according to the embodiment of the first aspect of the technical solution includes:

The first optical fiber 100 and the second optical fiber 200, the first optical fiber 100 and the second optical fiber 200 are provided with optical fiber coding 101, the optical fiber coding 101 is composed of multiple fiber gratings with different spacings, and the fiber gratings are cured and engraved in on the fiber;

The first terminal 300 and the second terminal 400, the first terminal 300 and the second terminal 400 have the same structure, and are the transmitting end and the receiving end of each other. Narrowband light source 302, circulator 303, optical fiber encoding APD photoelectric conversion unit 304, amplifier 305, optical fiber encoding high-speed AD sampling unit 306, communication APD photoelectric conversion unit 307, communication high-speed AD sampling unit 308; wherein, the main controller 301 preferably Using 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 fiber-encoded light waves and communication light waves The second port of the circulator 303 connects the optical fiber coding APD photoelectric conversion unit 304, the amplifier 305, the fiber coding high-speed AD sampling unit 306, the main controller 301 successively, and this link is used to receive the reflected light coded light wave; the described The communication APD photoelectric conversion unit 307, the communication high-speed AD sampling unit 308, and the main controller 301 are connected in sequence, and this link is used to receive the communication light wave sent by the opposite terminal;

Wherein, the third port of the circulator 303 of the first terminal 300 is connected to the communication APD photoelectric conversion unit 307 of the second terminal 400 through the first optical fiber 100, and the second terminal 400 The third port of the circulator 303 is connected to the communication APD photoelectric conversion unit 307 of the first terminal 300 through the second optical fiber 200, and the two terminals are connected to a symmetrical integrated system through two optical fibers; The center wavelengths of the plurality of fiber gratings and the narrowband light source 302 are consistent, so that the optical fiber encoding light wave can share the narrowband light source 302 with the communication light wave. The optical fiber code 101 reflects the corresponding light intensity according to its reflectivity. The main controller 301 of the first terminal 300/second terminal 400 collects the light intensity and distance reflected by the fiber code 101, and calculates the phase relationship between the fiber gratings in the fiber code 101. On the other hand, the unreflected light wave is transmitted to the main controller 301 of the opposite side through the communication APD photoelectric conversion unit 307 and the communication high-speed AD sampling unit 308 of the opposite side, The data information of the communication can be parsed.

As mentioned above, the present embodiment utilizes the narrow-band light source 302 to provide the same light source for optical fiber code acquisition and identification and optical fiber communication at the same time. By setting two optical fibers with optical fiber code 101 and the optical fiber code APD photoelectric conversion unit 304, amplifier 305, and fiber code high-speed AD sampling unit 306 , communication APD photoelectric conversion unit 307 , communication high-speed AD sampling unit 308 and other modules can realize normal operation of optical fiber communication and simultaneous acquisition of optical fiber encoding 101 , saving the cost problem of traditional separate operation structure.

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 ) interval, the design of this interval can ensure that the spectrum of the narrow-band light source covers the spectrum of the fiber grating, and realize the stable identification of the fiber grating.

In some embodiments of the first aspect of the present invention, the maximum reflectivity of the fiber grating is w=(i/(10*LOG(P)))^(e0+e1), so that multiple Stable identification of fiber gratings with the same center wavelength, wherein P is the luminous intensity of the narrowband light source 302, i is the optical fiber communication energy range of the first terminal 300 and the second terminal 400, and e0 is the optical fiber in the optical fiber code 101. The number of gratings, e1 is the maximum data of 101 optical fibers between the first terminal 300 and the second terminal 400 .

Further, in some embodiments of the first aspect of the present invention, the minimum spacing L=M/((t1*2)/4) between the fiber gratings in the optical fiber encoding 101 can realize that each optical fiber in the optical fiber encoding The grating can effectively distinguish the energy and avoid the excessively large pulse directly covering multiple fiber gratings, wherein, t1 is the optical fiber encoded light wave sent by the narrowband light source 302, M is the conversion frequency of the optical fiber encoding APD photoelectric conversion unit 304, so The sampling frequency N of the fiber encoding high-speed AD sampling unit 306 is greater than M/4.

As shown in FIG. 2 , an integrated control method for optical fiber code identification and communication according to a second aspect of the technical solution, applied to the above-mentioned integrated optical fiber code identification and communication system, includes the following steps:

The narrow-band light source 302 is controlled by the main controller 301 of the first terminal 300/second terminal 400 on one side to transmit the fiber-encoded light wave and the communication light wave according to the communication protocol;

The optical fiber encoding APD photoelectric conversion unit 304 obtains the optical fiber encoding light wave reflected by the optical fiber end of the circulator 303 and performs photoelectric conversion, and the amplifier 305 amplifies the converted electrical signal and outputs it to the optical fiber encoding high-speed AD sampling unit 306;

The optical fiber encoding high-speed AD sampling unit 306 feeds back the collected electrical signal to the main controller 301, and the main controller 301 analyzes the optical fiber encoding value;

The communication APD photoelectric conversion unit 307 acquires the communication light wave sent by the opposite second terminal 400/the first terminal 300, converts the communication light wave signal into an electrical signal, and outputs it to the communication high-speed AD sampling unit 308;

The communication high-speed AD sampling unit 308 feeds back the collected electrical signal to the main controller 301, and the main controller 301 parses out the data information.

In some embodiments of the second aspect of the present invention, the pulse width of the optical fiber encoded light wave is t1, the pulse width of the communication light wave is t0, and t0 is less than t1/2, which is convenient for the main controller 301 on the light receiving side According to the pulse width, it is judged whether it is the optical fiber communication emitting light or the optical fiber coding acquisition and identification light emitting. The FPGA control chip sends an optical fiber communication pulse drive signal to the narrowband light source 302, and the narrowband 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 communication light wave with a 0, 1 structure and a time interval of t0 as a code. It is reflected at the fiber end of the circulator 303, and the reflected light wave is converted into an electrical signal by the optical fiber encoding APD photoelectric conversion collection, and then recorded and amplified by the amplifier 305, and then collected by the fiber encoding high-speed AD sampling unit 306, wherein the fiber end reflects The light wave will show a pulse width from t0 to t0*2, and the pulse interval is less than t0*14*2 (because the optical fiber communication pulse drive signal in this embodiment uses hexadecimal, 16 0, 1 composition, that is, the optical pulse width There are 16 t0s. When the optical pulse passes through the fiber code 101, it will present twice the reflected light. Considering that the energy of each t0 pulse before and after is weak, it is t0(16-2)*2). For this reason, the FPGA control chip According to this feature, it is judged whether the collected data is optical fiber encoded information.

In some embodiments of the second aspect of the present invention, the fiber-encoded light wave transmits a time pulse of k*t1 once and then waits for the integration time t2, where k is the pulse coefficient, the value of k ranges from 1 to 1000, and the integration time t2 =((measured fiber length*group refractive index)/light speed)+additional time, wherein the additional time is 10*k*t1, the above integration time and additional time are to avoid the interference of the light wave reflected in the fiber to the collected light wave, The integration time and the additional time can realize the disappearance of the reflected light in the optical fiber. Specifically, the FPGA control chip sends the optical fiber encoding acquisition pulse drive signal to the narrowband light source 302, the narrowband light source 302 sends the pulsed 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, and the optical fiber will produce backscattering and reflection At the same time, the optical fiber encoding 101 will also generate reflection, and the reflected light is transmitted to the optical fiber encoding APD photoelectric conversion unit 304 through the circulator 303 to collect and convert it into an electrical signal, which is then recorded and amplified by the amplifier 305, and then collected by the optical fiber encoding high-speed AD sampling unit 306. The FPGA control chip obtains the collected data signal, searches the collected data for peaks, calculates the distance between the peaks, and interprets the corresponding fiber code value.

In addition, the optical fiber code value recorded each time includes the code value, energy, and distance, and is compared with the first recorded data, so as to judge whether the optical fiber code 101 is interrupted or not, and to attenuate the energy change of the optical fiber code 101 judge.

Further, because the collected light wave energy will exceed the collection threshold of the optical fiber encoding APD photoelectric conversion unit 304 and the optical fiber encoding high-speed AD sampling unit 306, its energy will appear flat-top phenomenon at the top of the waveform, and the energy will be distorted. The peak energy is fitted. In some embodiments of the second aspect of the present invention, the main controller 301 first performs peak energy analysis on the electrical signal collected by the optical fiber encoding high-speed AD sampling unit 306 before analyzing the optical fiber encoding value. Fitting, peak energy after fitting==65535*10^((number of explosions-1)*explosion coefficient/10)+((energy of one pixel before explosion + energy of one pixel after explosion)/2- (starting point energy + end point energy))/2), where the explosion factor defaults to 1.

In some embodiments of the second aspect of the present invention, before the main controller 301 parses the optical fiber encoding value, it needs to perform optical encoding bandwidth identification, and only retains the data within the preset optical encoding bandwidth range, and discards it if it exceeds; Before the main controller 301 parses the data information, it needs to identify the communication bandwidth, and only retains the data within the preset communication bandwidth range and parses it according to the pulse interval width, and discards it if it exceeds.

In some embodiments of the second aspect of the present invention, the preset optical encoding bandwidth range is: the bandwidth is greater than t1-(t0*0.1), and the preset communication bandwidth range is: t0±(t0*0.1), Among them, 0.1 is the optimal value obtained in the actual research.

To sum up, this scheme uses the narrow-band light source 302 to provide the same light source for fiber code acquisition and identification and fiber communication at the same time. By setting two fibers with fiber code 101 and fiber code APD photoelectric conversion unit 304, amplifier 305, fiber code high-speed AD sampling Unit 306, communication APD photoelectric conversion unit 307, communication high-speed AD sampling unit 308 and other modules, combined with time division technical means to control and identify optical fiber coding and communication light waves, can realize the normal operation of optical fiber communication and the simultaneous acquisition of optical fiber coding 101, saving traditional separation cost of operating structures.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms 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.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention. Variations, the scope of the present invention 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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