CN111812626B - Optical cable splice box positioning system and method based on optical fiber coding - Google Patents

Abstract

The present invention discloses a system and method for positioning an optical cable junction box based on optical fiber coding. The system includes: a light source, a circulator, a communication optical fiber, and a signal generator, which is arranged on one side of an optical fiber segment with optical fiber coding in the optical cable junction box, and is used to generate a physical signal containing position data and an optical fiber coding number and act on the outer layer of the communication optical fiber to cause the optical wave signal transmitted back by the optical fiber coding to be strained; a photoelectric detector, which is used to receive the optical wave signal; and a main control module, which is used to control the output of the light source, control the reception of the photoelectric detector, and identify the optical wave signal that is strained according to the rules. This scheme combines optical fiber positioning, optical fiber sensing, and optical fiber coding technology with an optical cable junction box, and after encoding the position data and the optical fiber coding number of the optical cable junction box, strain excitation is performed on the outer layer of the optical cable, and the unique identification characteristics and sensing characteristics of the optical fiber coding are used to realize the unique identity recognition and automatic geographical location positioning of the optical cable junction box.

Description

Optical cable splice box positioning system and method based on optical fiber coding

Technical Field

The invention relates to the field of optical fiber communication, and in particular to an optical cable joint box positioning system and method based on optical fiber coding.

Background Art

The optical cable splice box is a connecting part that connects two or more optical cables and has protective components. It is a must-have in the construction of optical cable lines and is one of the most important equipment. The quality of the optical cable splice box directly affects the quality of the optical cable line and the service life of the optical cable line. Traditional optical cable splice boxes cannot achieve automatic positioning and require manual measurement for positioning.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a fiber optic cable splice box positioning system based on fiber optic coding, which can realize the unique identity recognition and automatic geographical location positioning of the fiber optic cable splice box; the present invention also provides a fiber optic cable splice box positioning method based on fiber optic coding.

According to an embodiment of the first aspect of the present invention, a fiber optic cable joint box positioning system based on fiber optic coding comprises: a light source for outputting a light wave signal; a circulator, the circulator having a first port, a second port, and a third port; a first SOA optical switch is arranged between the first port of the circulator and the output end of the light source; a communication optical fiber, one end of the communication optical fiber is connected to the second port of the circulator, the other end of the communication optical fiber is passed through at least one optical cable joint box and the optical fiber segment in the optical cable joint box is provided with a fiber optic coding; a signal generator is arranged on one side of the optical fiber segment with the fiber optic coding in the optical cable joint box, and is used to generate a physical signal including position data and a fiber optic coding number and act on the outer layer of the communication optical fiber to make the light wave signal returned by the fiber optic coding strain according to a certain rule; a photoelectric detector, a second SOA optical switch is arranged between the input end of the photoelectric detector and the third port of the circulator, and is used to receive the light wave signal returned by the fiber optic coding and strained according to the rule; a main control module is electrically connected to the light source and the photoelectric detector respectively to control the output of the light source, control the reception of the photoelectric detector and identify the light wave signal strained according to the rule.

The optical cable junction box positioning system based on optical fiber coding according to the first embodiment of the present invention has at least the following beneficial effects: the present solution combines optical fiber positioning, optical fiber sensing, optical fiber coding technology with the optical cable junction box, and after encoding the position data of the optical cable junction box and the optical fiber coding number combination, strain excitation is performed on the outer layer of the optical cable, and the unique identification characteristics and sensing characteristics of the optical fiber coding are utilized to realize the unique identity recognition and automatic geographical location positioning of the optical cable junction box.

According to some embodiments of the first aspect of the present invention, the signal generator includes a fixed plate and a power supply, a control chip, a strain gauge, and a positioning chip arranged on the fixed plate, the power supply supplies power to the control chip, the strain gauge and the positioning chip, the positioning chip is used to collect the position data of the optical cable junction box to provide it to the control chip, the control chip combines and encodes the optical fiber code number and the position data of the optical cable junction box according to a certain rule and controls the strain gauge to output a corresponding physical signal, and one side of the optical fiber code on the communication optical fiber is fixed to the fixed plate and contacts the strain gauge.

According to some embodiments of the first aspect of the present invention, a trigger switch for controlling the power supply of the power supply is provided on the fixing plate.

According to some embodiments of the first aspect of the present invention, the strain gauge is an electromagnetic vibrator, a heater or a stress generator.

According to some embodiments of the first aspect of the present invention, the strain gauge is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is a basic signal element, the duration of the basic signal element is T0, and the waiting time between two adjacent basic signal elements is n*T0, where n is a positive integer.

According to some embodiments of the first aspect of the present invention, the switching pulse time of the first SOA optical switch and the second SOA optical switch is T, the switching time difference between the first SOA optical switch and the second SOA optical switch is n*T, and the length of the optical fiber coding distance to the photodetector is L=n*T*c*r/2, where n is a positive integer, c is the speed of light, and r is the refractive index of the optical fiber group.

According to a second aspect of an embodiment of the present invention, a method for positioning an optical cable junction box based on optical fiber coding comprises the following steps: controlling a light source to send an optical wave signal; the optical wave signal generates a pulsed light wave through a first SOA optical switch and enters the communication optical fiber through a circulator; generating a physical signal including position data and an optical fiber coding number and acting on the outer layer of the communication optical fiber at the position where the optical fiber coding is located in the optical cable junction box, so that the optical wave signal returned by the optical fiber coding is strained according to a certain rule; controlling a photoelectric detector through the switching time of a second SOA optical switch to receive the optical wave signal returned by the circulator in the communication optical fiber to generate a pulsed light wave strained according to the rule; the photoelectric detector transmits the received pulsed light wave strained according to the rule to a main control module, and the main control module identifies the pulsed light wave strained according to the rule.

A method for locating an optical cable junction box based on optical fiber coding according to the second embodiment of the present invention has at least the following beneficial effects: this solution combines optical fiber positioning, optical fiber sensing, and optical fiber coding technology with an optical cable junction box, and after encoding the position data of the optical cable junction box and the optical fiber coding number combination, strain excitation is performed on the outer layer of the optical cable, and the unique identification characteristics and sensing characteristics of the optical fiber coding are utilized to achieve unique identity recognition and automatic geographical location positioning of the optical cable junction box.

According to some embodiments of the second aspect of the present invention, the method further includes decoding the pulse light wave that is distorted according to the rule according to the identification of the main control module, and decoding the position data of the optical cable joint box and the optical fiber code number.

According to some embodiments of the second aspect of the present invention, the method further includes matching the position data and the optical fiber code number with the optical fiber code to achieve automatic acquisition of the optical fiber code and position data of the optical cable splice box.

According to some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, the switching time difference of the vibration signal is a basic signal element, the duration of the basic signal element is T0, and the waiting time between two adjacent basic signal elements is n*T0, where n is a positive integer.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

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

1 is a schematic diagram of a positioning system for an optical cable splice box according to a first aspect of the present invention;

FIG2 is a schematic diagram of a signal generator according to an embodiment of the first aspect of the present invention;

3 is a schematic diagram of an optical fiber segment of an optical cable splice closure according to an embodiment of the first aspect of the present invention;

FIG. 4 is a flow chart of a method for positioning an optical cable splice box according to an embodiment of the second aspect of the present invention.

Reference numerals:

Light source 100, circulator 200, first SOA optical switch 210, second SOA optical switch 220, communication optical fiber 300, optical fiber encoding 310, protection tube 320, tail tube 330, signal generator 400, fixing plate 410, power supply 420, control chip 430, strain gauge 440, positioning chip 450, trigger switch 460, photoelectric detector 500, main control module 600, optical cable junction box 700.

DETAILED DESCRIPTION

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 therefore should not be understood as a limitation on the present invention.

In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

Referring to FIG1 , a fiber optic cable joint box positioning system based on fiber optic coding according to an embodiment of the first aspect of the present technical solution includes: a light source 100 for outputting a light wave signal; a circulator 200, wherein the circulator 200 has a first port, a second port, and a third port; a first SOA optical switch 210 is arranged between the first port of the circulator 200 and the output end of the light source 100; a communication optical fiber 300, wherein one end of the communication optical fiber 300 is connected to the second port of the circulator 200, and the other end of the communication optical fiber 300 is passed through at least one fiber optic cable joint box 700, and the optical fiber segment in the fiber optic cable joint box 700 is provided with a fiber optic code 310; a signal generator 400, which is arranged at the fiber optic cable joint The box 700 has a side of the optical fiber segment of the optical fiber code 310, which is used to generate a physical signal containing position data and the optical fiber code number and act on the outer layer of the communication optical fiber 300 to make the optical wave signal returned by the optical fiber code 310 strain according to a certain rule; the photodetector 500, a second SOA optical switch 220 is arranged between the input end of the photodetector 500 and the third port of the circulator 200, which is used to receive the optical wave signal strained according to the rule returned by the optical fiber code 310; the main control module 600 is electrically connected to the light source 100 and the photodetector 500 respectively to control the output of the light source 100, control the reception of the photodetector 500 and identify the optical wave signal strained according to the rule.

The light source 100 selects a light source of a corresponding wavelength band according to the wavelength band used by the optical fiber coding; the circulator 200 is used to realize the coupling of light waves, output the input light wave to the optical fiber, and output the back-reflected and scattered light wave in the optical fiber to the photodetector end; the signal generator 400 is used to generate a certain regular strain frequency sequence containing position data and optical fiber coding number; when strain occurs, the light wave signal reflected and scattered by the optical fiber coding will change in wavelength synchronously with the strain frequency; the main control module 600 controls the photodetector 500 to receive and identify the light wave signal strained according to the rules.

This embodiment combines optical fiber positioning, optical fiber sensing, and optical fiber coding technology with an optical cable junction box. The position data of the optical cable junction box and the optical fiber coding number are combined and encoded, and strain excitation is performed on the outer layer of the optical cable. The unique identification characteristics and sensing characteristics of the optical fiber coding are utilized to achieve unique identity recognition and automatic geographic location positioning of the optical cable junction box.

In some embodiments of the first aspect of the present invention, as shown in FIG. 2 , the signal generator 400 includes a fixing plate 410 and a power supply 420, a control chip 430, a strain gauge 440, and a positioning chip 450 arranged on the fixing plate 410. The power supply 420 supplies power to the control chip 430, the strain gauge 440, and the positioning chip 450. The positioning chip 450 is used to collect the position data of the optical cable splice box 700 to provide it to the control chip 430. The control chip 430 combines the optical fiber code number with the position data of the optical cable splice box 700 according to a certain rule and encodes it and controls the strain gauge 440 to output a corresponding physical signal. One side of the optical fiber code 310 on the communication optical fiber 300 is fixed on the fixing plate 410 such as glue or other fasteners and contacts the strain gauge 440. The control chip 430 controls the strain gauge 400 to strain according to a certain rule and strain according to a certain time rule, and converts the rule into a corresponding long and short signal or a 0, 1 signal. In combination with the operability and convenience of the system, the 0, 1 signal is finally preferably used to convert the binary code into a strain signal. The positioning chip 450 may adopt existing devices such as a GPS chip and a Beidou satellite positioning chip.

In some embodiments of the first aspect of the present invention, a trigger switch 460 for controlling the power supply of the power supply 420 is provided on the fixing plate 410. The trigger switch 460 is pressed by a pressure strip, and the power supply is turned off when pressed. When the smart junction box is used, the pressure strip needs to be pulled out, and the power supply starts after the pressure strip is pulled out, and the system works normally.

As shown in FIG. 3 , in some embodiments of the first aspect of the present invention, a protective tube 320 is provided outside the optical fiber segment of the communication optical fiber 300 in the optical cable junction box 700 to protect the optical fiber code 310. Conical tail tubes 330 are provided at both ends of the protective tube 320 to protect the pigtail from breaking.

In some embodiments of the first aspect of the present invention, the strain gauge 440 is an electromagnetic vibrator, a heater or a stress generator. However, considering factors such as time control and energy consumption control (such as the heater is not conducive to heat dissipation control), it is finally considered to use an electromagnetically controlled vibrator; a single vibration has certain characteristics in its vibration waveform, but due to the influence of factors such as interference and distance, it is risky to identify the accurate feature points. However, this solution only identifies the vibration and continuous vibration time, which is easy to implement.

In some embodiments of the first aspect of the present invention, the switching pulse time of the first SOA optical switch 210 and the second SOA optical switch 220 is T, the switching time difference between the first SOA optical switch 210 and the second SOA optical switch 220 is n*T, and the length L of the optical fiber code 310 from the photodetector 500 is L=n*T*c*r/2, where n is a positive integer, c is the speed of light, and r is the refractive index of the optical fiber group.

In some embodiments of the first aspect of the present invention, the strain gauge 440 is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is a basic signal element, the duration of the basic signal element is T0, and the waiting time between two adjacent basic signal elements is n*T0, where n is a positive integer.

As shown in FIG4 , a method for positioning an optical cable junction box based on optical fiber coding according to an embodiment of the second aspect of the present invention comprises the following steps: controlling a light source to send an optical wave signal; the optical wave signal generates a pulsed light wave through a first SOA optical switch and enters the communication optical fiber through a circulator; generating a physical signal including position data (such as longitude and latitude) and an optical fiber code number (forming a combination of strain time and interval time according to a certain binary grouping rule) and acting on the outer layer of the communication optical fiber at the location of the optical fiber code in the optical cable junction box, so that the optical wave signal returned by the optical fiber code is strained according to a certain rule; controlling the photoelectric detector to receive the optical wave signal returned by the circulator in the communication optical fiber through the switching time of the second SOA optical switch to generate a pulsed light wave strained according to the rule; the photoelectric detector transmits the received pulsed light wave strained according to the rule to the main control module, and the main control module identifies the pulsed light wave strained according to the rule.

This embodiment combines optical fiber positioning, optical fiber sensing, and optical fiber coding technology with an optical cable junction box. The position data of the optical cable junction box and the optical fiber coding number are combined and encoded, and strain excitation is performed on the outer layer of the optical cable. The unique identification characteristics and sensing characteristics of the optical fiber coding are utilized to achieve unique identity recognition and automatic geographic location positioning of the optical cable junction box.

In some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, a temperature signal or a stress signal. When the optical fiber is affected by the external environment (such as temperature, pressure, vibration, etc.), the parameters such as the intensity, phase, frequency, polarization state, etc. of the light transmitted in the optical fiber will change accordingly.

In some embodiments of the second aspect of the present invention, the switching pulse time of the first SOA optical switch and the second SOA optical switch is T, the switching time difference between the first SOA optical switch and the second SOA optical switch is n*T, and the length of the optical fiber coding distance to the photodetector is L=n*T*c*r/2, where n is a positive integer, c is the speed of light, and r is the refractive index of the optical fiber group. The measurement accuracy l is the optical fiber length transmitted by the SOA switching pulse time T, l=T*c*r/2.

In some embodiments of the second aspect of the present invention, the method further includes decoding the pulse light wave that is distorted according to the rule according to the identification of the main control module, and decoding the position data of the optical cable joint box and the optical fiber code number.

In some embodiments of the second aspect of the present invention, the method further includes matching the position data and the optical fiber code number with the optical fiber code measured by the system to achieve automatic collection of the optical fiber code and position data of the optical cable splice box.

In some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, the switching time difference of the vibration signal is a basic signal element, the duration of the basic signal element is T0, and the waiting time between two adjacent basic signal elements is n*T0, where n is a positive integer.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (8)

1. An optical cable splice box positioning system based on optical fiber coding, characterized by comprising: A light source (100) for outputting a light wave signal; A circulator (200), the circulator (200) having a first port, a second port, and a third port; a first SOA optical switch (210) is provided between the first port of the circulator (200) and an output end of the light source (100); A communication optical fiber (300), one end of the communication optical fiber (300) being connected to the second port of the circulator (200), the other end of the communication optical fiber (300) being passed through at least one optical cable junction box (700) and the optical fiber segment in the optical cable junction box (700) being provided with an optical fiber code (310); A signal generator (400) is arranged on one side of the optical fiber segment having the optical fiber code (310) in the optical cable joint box (700), and is used to generate a physical signal including position data and the optical fiber code number and act on the outer layer of the communication optical fiber (300) so that the optical wave signal returned by the optical fiber code (310) is strained according to a certain rule; A photodetector (500), wherein a second SOA optical switch (220) is provided between an input end of the photodetector (500) and a third port of the circulator (200), and is used to receive a light wave signal of regular strain transmitted back from the optical fiber code (310); A main control module (600) is electrically connected to the light source (100) and the photodetector (500) respectively, and is used to control the output of the light source (100), control the reception of the photodetector (500), and identify light wave signals that are distorted according to the rules; The signal generator (400) comprises a fixing plate (410) and a power supply (420), a control chip (430), a strain gauge (440), and a positioning chip (450) arranged on the fixing plate (410); the power supply (420) supplies power to the control chip (430), the strain gauge (440), and the positioning chip (450); the positioning chip (450) is used to collect position data of the optical cable joint box (700) and provide the position data to the control chip (430); the control chip (430) combines and encodes the optical fiber code number and the position data of the optical cable joint box (700) according to a certain rule and controls the strain gauge (440) to output a corresponding physical signal; one side of the optical fiber code (310) on the communication optical fiber (300) is fixed on the fixing plate (410) and contacts the strain gauge (440); The switching pulse time of the first SOA optical switch (210) and the second SOA optical switch (220) is T, the switching time difference between the first SOA optical switch (210) and the second SOA optical switch (220) is n*T, and the length L of the optical fiber code (310) from the photodetector (500) is L=n*T*c*r/2, wherein n is a positive integer, c is the speed of light, and r is the refractive index of the optical fiber group. 2. The optical cable splice box positioning system based on optical fiber coding according to claim 1, characterized in that a trigger switch (460) for controlling the power supply of the power supply (420) is arranged on the fixing plate (410). 3. The optical cable splice box positioning system based on optical fiber coding according to claim 1, characterized in that the strain gauge (440) is an electromagnetic vibrator, a heater or a stress generator. 4. The optical cable junction box positioning system based on optical fiber coding according to claim 1 is characterized in that: the strain gauge (440) is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is a basic signal element, the duration of the basic signal element is T0, and the waiting time between two adjacent basic signal elements is n*T0, where n is a positive integer. 5. A method for locating an optical cable splice box based on optical fiber coding, applied to the optical cable splice box locating system based on optical fiber coding according to any one of claims 1 to 4, characterized in that: comprising the following steps: Control the light source to send light wave signals; The optical wave signal generates a pulse optical wave through the first SOA optical switch and enters the communication optical fiber through the circulator; Generate a physical signal containing position data and fiber code number and act on the outer layer of the communication optical fiber at the location of the fiber code in the optical cable joint box, so that the optical wave signal returned by the fiber code is strained according to certain rules; The photoelectric detector receives the optical wave signal transmitted back through the circulator in the communication optical fiber by controlling the switching time of the second SOA optical switch to generate a pulsed optical wave according to the rule; The photoelectric detector transmits the received pulse light wave strained according to the rule to the main control module, and the main control module identifies the pulse light wave strained according to the rule. 6. A method for locating an optical cable junction box based on optical fiber coding according to claim 5, characterized in that it also includes decoding the pulse light wave that is distorted according to the rule according to the main control module to decode the position data of the optical cable junction box and the optical fiber coding number. 7. A method for locating an optical cable splice box based on optical fiber coding according to claim 6, characterized in that it also includes matching the position data and the optical fiber coding number with the optical fiber coding to realize automatic collection of the optical fiber coding and position data of the optical cable splice box. 8. According to a method for locating an optical cable junction box based on optical fiber coding as described in claim 5, it is characterized in that: the physical signal is a vibration signal, the switching time difference of the vibration signal is a basic signal element, the duration of the basic signal element is T0, and the waiting time between two adjacent basic signal elements is n*T0, where n is a positive integer.