CN111082869A - Switching value signal transmission control system based on optical fiber - Google Patents
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 51
- 230000008054 signal transmission Effects 0.000 title claims abstract description 25
- 230000003287 optical effect Effects 0.000 claims abstract description 126
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 239000000835 fiber Substances 0.000 claims description 5
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- 238000005259 measurement Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
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- 238000012544 monitoring process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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Abstract
The invention discloses a switching value signal transmission control system based on optical fibers, which is applied to the field of optical fiber communication and aims to solve the problems that a transmission cable is complicated, the switching value signal transmission control system is easy to be interfered by electromagnetic waves and is difficult to pass through self-checking and the like in the transmission of a large number of switching value signals in an industrial process measurement and control system; the optical signals with different wavelengths are adopted to independently transmit different switching value signals, the optical signals carrying the different switching value signals are transmitted through optical fibers, the optical signals carrying the different switching value signals are converted into a plurality of corresponding paths of electric signals through a plurality of second photoelectric detectors before entering a control system, the plurality of paths of electric signals carry the different switching value signals, and the electric signals are amplified by a voltage amplifier and then input into a switch valve or a relay, so that the transmission of a large number of switching value signals is realized; before entering the second photoelectric detector, optical signals carrying different switching value signals are reflected by the reflector to the first photoelectric detector to be converted into electric signals and output to the semiconductor diode, and therefore the self-checking of the access is achieved.
Description
Technical Field
The invention belongs to the technical field of optical fiber communication, and particularly relates to a switching value transmission control system.
Background
The industrial process measurement and control system needs to transmit a large amount of switching value signals, the traditional transmission mode mostly uses the on-off of 24V or 48V electric signals to transmit the switching value signals, a large amount of cables are needed to be used in the mode, multi-terminal isolation distribution is not easy to carry out, access self-checking is difficult to carry out, and meanwhile certain defects exist in the aspect of electromagnetic compatibility.
The optical fiber has the advantages of small volume, electromagnetic interference resistance, strong multiplexing capability and the like, and can realize the simultaneous and independent transmission of multiple signals on one optical fiber.
Disclosure of Invention
The problems that transmission cables are complicated, access self-checking cannot be carried out, electromagnetic interference is easy to occur and the like exist in transmission of a large number of switching value signals in an industrial process measurement and control system at present are solved; the invention provides a switching value signal transmission control system based on optical fibers, which utilizes the advantages of small volume, electromagnetic interference resistance, strong multiplexing capability and the like of the optical fibers to realize the switching value transmission control system with simple transmission path and self-checking access.
One of the technical schemes adopted by the invention is as follows: an optical fiber-based switching value signal transmission control system,
adopt the optical signal of different wavelength independently to transmit different switching value signals, include: the system comprises a light source generation module, n optical switches, a switching value signal output system, an n × 1 wavelength division multiplexer, an optical fiber, a first 1 × n wavelength division multiplexer, a second photoelectric detector, a voltage amplifier and a switch valve;
the light source generation module is used for generating n paths of optical signals with different wavelengths, the n optical switches generate n different switching value signals under the control of the switching value signal output system, and the n paths of optical signals with different wavelengths generated by the light source generation module are loaded with one switching value signal after passing through the corresponding optical switch to obtain n paths of optical signals with different switching value signals; the n paths of optical signals with different switching value signals are input into an n-1 wavelength division multiplexer to synthesize 1 path of optical signals, and the 1 path of optical signals are input into the 1-n wavelength division multiplexer through optical fibers and are divided into n paths of optical signals with different switching value signals through a first 1-n wavelength division multiplexer; and the n paths of optical signals with different switching value signals are converted into n paths of electric signals through n second photoelectric detectors respectively, and the n paths of electric signals are input into the switch valve through n voltage amplifiers respectively.
Furthermore, the system also comprises n 2 x 1 couplers, n 1 x 2 splitters, n reflectors, n second photodetectors and n light emitting diodes;
the n paths of optical signals with different switching value signals output after passing through the n optical switches are respectively input from first ends of n 2 x 1 couplers, and the n paths of optical signals with different switching value signals output from second ends of the n 2 x 1 couplers are input into the n x 1 wavelength division multiplexer to be synthesized into 1 path of optical signals;
the first 1 x n wavelength division multiplexer divides n optical signals with different switching value signals into n optical signals which are respectively input through first ends of n 1 x 2 splitters, the optical signals output through second ends of the n 1 x 2 splitters are used as output of a transmission system, and the optical signals output through third ends of the n 1 x 2 splitters respectively enter n reflectors;
the n paths of optical signals reflected by the reflecting mirror are respectively input from the third ends of the n 1 x 2 splitters, output from the first ends of the n 1 x 2 splitters, sequentially pass through the first 1 x n wavelength division multiplexer, the optical fiber and the n 1 wavelength division multiplexer, and then are respectively input to the second ends of the n 2 x 1 couplers, and the optical signals output from the third ends of the 2 x 1 couplers are converted into electric signals through the first photoelectric detector and then are input into the light emitting diode.
Further, the light source generation module includes: the broadband light source generates n paths of optical signals with different wavelengths through the second 1 x n wavelength division multiplexer.
Further, the light source generation module is a single-wavelength light source with n different wavelengths.
Furthermore, the light emitting diodes are completely replaced by a signal acquisition and processing system, so that fixed-point detection in the switching value transmission path is realized.
Further, the switching valve is replaced with a relay.
Further, the switching value output system is a circuit or manual control.
The second technical scheme adopted by the invention is as follows: switching value signal transmission control system based on optic fibre adopts the optical signal of different wavelength independent transmission different switching value signals, includes: the system comprises a plurality of single-wavelength light sources with different wavelengths, a switching value signal output system, an n-1 wavelength division multiplexer, an optical fiber, a 1-n wavelength division multiplexer, a second photoelectric detector, a voltage amplifier and a switching valve;
the plurality of single-wavelength light sources with different wavelengths generate n paths of optical signals with different switching value signals under the control of the switching value signal output system; the n paths of optical signals with different switching value signals are input into an n-1 wavelength division multiplexer to synthesize 1 path of optical signals, and the 1 path of optical signals are input into the 1-n wavelength division multiplexer through optical fibers and are divided into n paths of optical signals with different switching value signals through the 1-n wavelength division multiplexer; and the n paths of optical signals with different switching value signals are converted into n paths of electric signals through n second photoelectric detectors respectively, and the n paths of electric signals are input into the switch valve through n voltage amplifiers respectively.
Furthermore, the system also comprises n 2 x 1 couplers, n 1 x 2 splitters, n reflectors, n first photodetectors and n light emitting diodes;
the n paths of optical signals with different switching value signals are respectively input from first ends of n 2 x 1 couplers, and the n paths of optical signals with different switching value signals output from second ends of the n 2 x 1 couplers are input into the n x 1 wavelength division multiplexer to be synthesized into 1 path of optical signals;
the optical signals which are divided into n paths by the 1 x n wavelength division multiplexer and have different switching value signals are respectively input through the first ends of the n 1 x 2 splitters, the optical signals output through the second ends of the n 1 x 2 splitters are used as the output of a transmission system, and the optical signals output through the third ends of the n 1 x 2 splitters respectively enter the n reflectors;
the n paths of optical signals reflected by the reflecting mirror are respectively input from the third ends of the n 1 x 2 splitters, output from the first ends of the n 1 x 2 splitters, sequentially input to the second ends of the n 2 x 1 couplers after passing through the 1 x n wavelength division multiplexer, the optical fiber and the n x 1 wavelength division multiplexer, and are converted into electric signals by the first photoelectric detector to be input into the light emitting diode.
Furthermore, the light emitting diodes are completely replaced by a signal acquisition and processing system, so that fixed-point detection in the switching value transmission path is realized.
Further, the switching valve is replaced with a relay.
Further, the switching value output system is a circuit or manual control.
The invention has the beneficial effects that: the switching value signal transmission control system based on the optical fiber utilizes the advantages of small volume, electromagnetic radiation resistance, strong multiplexing capability and the like of the optical fiber, and adopts the optical fiber to realize independent transmission of different switching value signals of different wavelengths of optical signals, thereby realizing transmission of a large number of switching value signals, and the switching value signal transmission control system based on the optical fiber has the following advantages:
1. optical fiber transmission and optical signals with different wavelengths are respectively loaded with different switching value signals, so that the transmission of a large number of switching value signals is realized;
2. realizing the self-checking of the path;
3. and fixed-point monitoring of the optical path is realized.
Drawings
FIG. 1 is a first embodiment of a fiber-based switching value signal transmission control system according to the present invention;
FIG. 2 is a second embodiment of the switching value signal transmission control system based on optical fiber according to the present invention;
FIG. 3 is a third embodiment of the switching value signal transmission control system based on optical fiber according to the present invention;
the optical fiber switch comprises a broadband light source 11, a second 1 × 16 wavelength division multiplexer 21, a first 1 × 16 wavelength division multiplexer 22, an optical switch 3, a 2 × 1 coupler 4, a 16 × 1 wavelength division multiplexer 5, a 1 × 2 splitter 6, photodetectors 7 and 8, a reflector 9, a voltage amplifier 10, a light emitting diode 11, a transmission optical fiber 12, a circuit or manual switching value signal output system 13, a switching valve or relay 14, and single- wavelength light sources 15, 16 and 17 with three different wavelengths.
Detailed Description
In order to facilitate the understanding of the technical contents of the present invention by those skilled in the art, the present invention will be further explained with reference to the accompanying drawings.
Example one
The light source generation module is realized by the following steps: the method comprises the following steps: the broadband light source generates n paths of optical signals with different wavelengths through the second 1 x n wavelength division multiplexer; as shown in fig. 1, the switching value signal transmission control system based on optical fiber of the present invention includes: the system comprises a broadband light source 1, two 1 × n wavelength division multiplexers 21 and 22, an optical switch 3, a 2 × 1 coupler 4, an n × 1 wavelength division multiplexer 5, a 1 × 2 branching unit 6, two groups of photodetectors 7 and 8, a reflector 9, a voltage amplifier 10, a light emitting diode 11, a transmission optical fiber 12, a circuit or manual switching value signal output system 13 and a switching valve or relay 14;
the working principle is as follows: the broadband light source 11 is divided into n paths with different wavelengths by a 1 x n wavelength division multiplexer 21, and is respectively connected with n optical switches 3 controlled by a circuit or a manually controlled switching value signal output system 13, optical signals with switching value signals output by the optical switches 3 are input through a first end of a 2 x 1 coupler 4, optical signals output from a second end of the 2 x 1 coupler 4 are input into an n 1 wavelength division multiplexer 5, and are combined into 1 optical signal by the n 1 wavelength division multiplexer 5, the 1 optical signal is input into the 1 x n wavelength division multiplexer 22 through a long-distance transmission optical fiber 12 and is divided into n paths with different switching value signals, the n optical signals are respectively input through n 1 x 2 splitters 6, the n optical signals are respectively input from first ends of n 1 x 2 splitters 6, wherein the optical signals output from the second end of the splitters 6 are input into a photoelectric detector 7 and are converted into electric signals, the electrical signal carries different switching value signals, the electrical signal is finally input to a switching valve or a relay 14 through a voltage amplifier 10 to complete the transmission of the switching value signals, an optical signal output from the third end of the branching unit 6 is input to the reflecting mirror 9, the optical signal reflected by the reflecting mirror 9 sequentially passes through the 1 × n wavelength division multiplexer 22, the transmission optical fiber and the n × 1 wavelength division multiplexer, then is input from the second end of the 2 × 1 coupler 4, and the optical signal output from the third end of the 2 × 1 coupler 4 is input to the light emitting diode 11 through the photoelectric detector 8, so that the channel self-checking function of the system is finally realized.
Example two
In order to facilitate understanding of the present invention, n is set to 3 in this embodiment.
The light source generation module is realized by the following steps: the broadband light source 1 and the 1 x 3 wavelength division multiplexer 21 in the first embodiment are replaced by a plurality of single-wavelength light sources with different wavelengths; as shown in fig. 2, the switching value signal transmission system based on optical fiber of the present invention includes: single wavelength light sources 15, 16, 17, 1 × 3 wavelength division multiplexer 22, optical switch 3, 2 × 1 coupler 4, 3 × 1 wavelength division multiplexer 5, 1 × 2 splitter 6, two groups of n photodetectors 7, 8, reflector 9, voltage amplifier 10, light emitting diode 11, transmission fiber 12, circuit or manual switching value signal output system 13, switching valve or relay 14;
the three single wavelength light sources 15, 16, 17 with different wavelengths are respectively connected with 3 optical switches 3 controlled by a switching value signal output system 13 controlled by a circuit or a manual operation, the optical signals with switching value signals output by the optical switches 3 are input through a first end of a 2 x 1 coupler 4, the optical signals output from a second end of the 2 x 1 coupler 4 are input into a 3 x 1 wavelength division multiplexer 5, 1 optical signal is synthesized through a 3 x 1 wavelength division multiplexer 5, the 1 optical signal is input into a 1 x 3 wavelength division multiplexer 22 through a long-distance transmission optical fiber 12 and is divided into 3 optical paths with different switching value signals, the 3 optical signals are respectively input from first ends of 3 1 x 2 splitters 6, wherein the optical signals output from the second end of the splitter 6 are input into a photoelectric detector 7 to be converted into electric signals, and finally input into a switching valve or a relay 14 through a voltage amplifier 10 to complete the transmission of the switching value signals, the optical signal output from the third terminal of the splitter 6 is input to the mirror 9, the optical signal reflected by the mirror 9 sequentially passes through the 1 × 3 wavelength division multiplexer 22, the transmission optical fiber and the 3 × 1 wavelength division multiplexer, then is input from the second terminal of the 2 × 1 coupler 4, and the optical signal output from the third terminal of the 2 × 1 coupler 4 is input to the light emitting diode 11 through the photodetector 8, so that the channel self-checking function of the system is finally realized.
EXAMPLE III
In order to facilitate understanding of the present invention, n is set to 2 in this embodiment.
The light source generation module is realized by the following steps: in a first embodiment, the broadband light source 1 and the 1 × 2 wavelength division multiplexer 21 are replaced by a plurality of single-wavelength light sources with different wavelengths, and the output of the single-wavelength light sources is directly controlled by a circuit or manually, and further has no optical switching device, as shown in fig. 3, the switching value signal transmission system based on the optical fiber of the present invention includes: the system comprises single wavelength light sources 15, 16, 1 × 2 wavelength division multiplexers 22, 2 × 1 couplers 4, 2 × 1 wavelength division multiplexers 5, 1 × 2 splitters 6, two groups of photodetectors 7 and 8, a reflector 9, a voltage amplifier 10, a light emitting diode 11, a transmission optical fiber 12, a circuit or manual switching value signal output system 13 and a switch valve or relay 14, wherein the two groups of photodetectors respectively comprise 2 photodetectors;
the two single wavelength light sources 15, 16 with different wavelengths are respectively controlled by a switching value signal output system 13 controlled by a circuit or a manual, the optical signal with the switching value signal output by the light source is input through a first end of a 2 x 1 coupler 4, the optical signal output from a second end of the 2 x 1 coupler 4 is input into a 2 x 1 wavelength division multiplexer 5, and is synthesized into 1 optical signal by the 2 x 1 wavelength division multiplexer 5, the 1 optical signal is input into a 1 x 2 wavelength division multiplexer 22 through a long-distance transmission optical fiber 12 and is divided into 2 optical paths with different switching value signals, the 2 optical signals are respectively input from first ends of 3 1 x 2 splitters 6, wherein the optical signal output from the second end of the 6 is input into a photoelectric detector 7 and is converted into an electric signal, and is finally input into a switching valve or a relay 14 through a voltage amplifier 10 to complete the transmission of the switching value signal, the optical signal output from the third terminal of the splitter 6 is input to the mirror 9, the optical signal reflected by the mirror 9 sequentially passes through the 1 × 2 wavelength division multiplexer 22, the transmission optical fiber and the 2 × 1 wavelength division multiplexer, then is input from the second terminal of the 2 × 1 coupler 4, and the optical signal output from the third terminal of the 2 × 1 coupler 4 is input to the light emitting diode 11 through the photodetector 8, so that the channel self-checking function of the system is finally realized.
The optical switch 3 in the first and second embodiments converts the optical signals with different wavelengths into optical signals with switching value signals through a circuit or manual switching value output control system 13, and converts the optical signals with different wavelengths into optical signals with switching value signals through a circuit or manual control of whether the outputs of the light sources 15 and 16 are output or not in the third embodiment;
the voltage amplifier 10 in the three embodiments regulates and outputs according to the voltage required by the switch valve or the relay;
the light emitting diode 11 in the above three embodiments can judge whether the light path is on or off according to the output of the light emitting diode to realize the self-checking function of the system path;
the light emitting diode 11 in the above three embodiments can be replaced by a signal acquisition and processing system, so as to realize the fixed-point monitoring function of the optical path.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. Switching value signal transmission control system based on optic fibre, its characterized in that adopts the optical signal of different wavelength independently to transmit different switching value signals, includes: the system comprises a light source generation module, n optical switches, a switching value signal output system, an n × 1 wavelength division multiplexer, an optical fiber, a first 1 × n wavelength division multiplexer, a second photoelectric detector, a voltage amplifier and a switch valve;
the light source generation module is used for generating n paths of optical signals with different wavelengths, the n optical switches generate n different switching value signals under the control of the switching value signal output system, and the n paths of optical signals with different wavelengths generated by the light source generation module are loaded with one switching value signal after passing through the corresponding optical switch to obtain n paths of optical signals with different switching value signals; the n paths of optical signals with different switching value signals are input into an n-1 wavelength division multiplexer to synthesize 1 path of optical signals, and the 1 path of optical signals are input into the 1-n wavelength division multiplexer through optical fibers and are divided into n paths of optical signals with different switching value signals through a first 1-n wavelength division multiplexer; and the n paths of optical signals with different switching value signals are converted into n paths of electric signals through n second photoelectric detectors respectively, and the n paths of electric signals are input into the switch valve through n voltage amplifiers respectively.
2. The optical fiber-based switching value signal transmission control system according to claim 1, further comprising n 2 x 1 couplers, n 1 x 2 splitters, n mirrors, n first photodetectors, n light emitting diodes;
the n paths of optical signals with different switching value signals output after passing through the n optical switches are respectively input from first ends of n 2 x 1 couplers, and the n paths of optical signals with different switching value signals output from second ends of the n 2 x 1 couplers are input into the n x 1 wavelength division multiplexer to be synthesized into 1 path of optical signals;
the first 1 x n wavelength division multiplexer divides n optical signals with different switching value signals into n optical signals which are respectively input through first ends of n 1 x 2 splitters, the optical signals output through second ends of the n 1 x 2 splitters are used as output of a transmission system, and the optical signals output through third ends of the n 1 x 2 splitters respectively enter n reflectors;
the n paths of optical signals reflected by the reflecting mirror are respectively input from the third ends of the n 1 x 2 splitters, output from the first ends of the n 1 x 2 splitters, sequentially pass through the first 1 x n wavelength division multiplexer, the optical fiber and the n 1 wavelength division multiplexer, and then are respectively input to the second ends of the n 2 x 1 couplers, and the optical signals output from the third ends of the 2 x 1 couplers are converted into electric signals through the first photoelectric detector and then are input into the light emitting diode.
3. The optical fiber-based switching value signal transmission control system according to claim 2, wherein the light source generation module includes: the broadband light source generates n paths of optical signals with different wavelengths through the second 1 x n wavelength division multiplexer.
4. The optical fiber-based switching value signal transmission control system according to claim 2, wherein the light source generation module is a single-wavelength light source with n different wavelengths.
5. The optical fiber-based switching value signal transmission control system according to claim 3 or 4, wherein all the light emitting diodes are replaced with a signal acquisition and processing system.
6. The optical fiber-based switching value signal transmission control system according to claim 5, wherein the switching valve is replaced with a relay.
7. The optical fiber-based switching value signal transmission control system according to claim 6, wherein the switching value output system is a circuit or a manual control.
8. Switching value signal transmission control system based on optic fibre, its characterized in that adopts the optical signal of different wavelength independently to transmit different switching value signals, includes: the system comprises a plurality of single-wavelength light sources with different wavelengths, a switching value signal output system, an n-1 wavelength division multiplexer, an optical fiber, a 1-n wavelength division multiplexer, a second photoelectric detector, a voltage amplifier and a switching valve;
the plurality of single-wavelength light sources with different wavelengths generate n paths of optical signals with different switching value signals under the control of the switching value signal output system; the n paths of optical signals with different switching value signals are input into an n-1 wavelength division multiplexer to synthesize 1 path of optical signals, and the 1 path of optical signals are input into the 1-n wavelength division multiplexer through optical fibers and are divided into n paths of optical signals with different switching value signals through the 1-n wavelength division multiplexer; and the n paths of optical signals with different switching value signals are converted into n paths of electric signals through n second photoelectric detectors respectively, and the n paths of electric signals are input into the switch valve through n voltage amplifiers respectively.
9. The optical fiber-based switching value signal transmission control system according to claim 8, further comprising n 2 x 1 couplers, n 1 x 2 splitters, n mirrors, n first photodetectors, n light emitting diodes;
the n paths of optical signals with different switching value signals are respectively input from first ends of n 2 x 1 couplers, and the n paths of optical signals with different switching value signals output from second ends of the n 2 x 1 couplers are input into the n x 1 wavelength division multiplexer to be synthesized into 1 path of optical signals;
the optical signals which are divided into n paths by the 1 x n wavelength division multiplexer and have different switching value signals are respectively input through the first ends of the n 1 x 2 splitters, the optical signals output through the second ends of the n 1 x 2 splitters are used as the output of a transmission system, and the optical signals output through the third ends of the n 1 x 2 splitters respectively enter the n reflectors;
the n paths of optical signals reflected by the reflecting mirror are respectively input from the third ends of the n 1 x 2 splitters, output from the first ends of the n 1 x 2 splitters, sequentially input to the second ends of the n 2 x 1 couplers after passing through the 1 x n wavelength division multiplexer, the optical fiber and the n x 1 wavelength division multiplexer, and are converted into electric signals by the first photoelectric detector to be input into the light emitting diode.
10. The optical fiber-based switching value signal transmission control system according to claim 9, wherein the switching value output system is an electric circuit or a manual control.
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|---|---|---|---|---|
| CN113324925A (en) * | 2021-05-18 | 2021-08-31 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Optical fiber signal receiving device and pipeline early warning system |
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| Publication number | Publication date |
|---|---|
| CN110350972A (en) | 2019-10-18 |
| CN210807279U (en) | 2020-06-19 |
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