CN111049570A - Automatic switching protection system for optical fiber circuit - Google Patents
Automatic switching protection system for optical fiber circuit Download PDFInfo
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- CN111049570A CN111049570A CN201911324725.5A CN201911324725A CN111049570A CN 111049570 A CN111049570 A CN 111049570A CN 201911324725 A CN201911324725 A CN 201911324725A CN 111049570 A CN111049570 A CN 111049570A
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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
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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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
- H04B10/03—Arrangements for fault recovery
- H04B10/038—Arrangements for fault recovery using bypasses
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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
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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Abstract
The invention relates to an automatic switching protection system for an optical fiber circuit, which comprises a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber branching end of the optical splitter is respectively connected with the input ends of the first optical coupler and the second optical coupler through the communication optical fiber route and the standby optical fiber route, the transmission light source output ends of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the input end of the optical power detection circuit, the output end of the optical power detection circuit is connected with the I/O end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected; the invention has small volume, low power consumption and high reliability.
Description
Technical Field
The invention relates to an automatic switching protection system for an optical fiber circuit, and belongs to the field of optical fiber communication.
Background
Optical fiber communication has become a main transmission mode in power communication due to the characteristics of strong anti-interference capability, good transmission quality, low loss and difficulty in eavesdropping. The service borne by the optical cable is mainly protected by the self-healing ring, but once two points on the self-healing ring simultaneously fail, normal transmission of the service is affected, along with rapid development of a power grid, the mileage of an optical cable line is continuously increased, more and more optical cable resources are available, but the factors for damage of the power optical cable resource line by external force are increased day by day, the damage is frequent, the interruption of the optical cable becomes an important factor for affecting the reliability of optical transmission, and moreover, the rush-repair time of the optical cable is long, and a great deal of manpower and financial resources are consumed. How to guarantee that the advantages of optical cable resources are exerted under the condition that one optical cable or even two optical cables are interrupted, and an affected transmission system is quickly recovered so as to improve the survival consistency of the whole power communication network is a subject of research and discussion.
In recent years, with the rapid growth of power grid data services and the appearance of novel high-capacity comprehensive data carrying networks, scheduling data networks and the like, new requirements are put forward on backbone transport network networks, and the SDH technology is obviously insufficient in the aspects of bandwidth capacity, adaptation, carrying efficiency and the like for high-capacity data services; the Wavelength Division Multiplexing (WDM) technology cannot provide flexible service transmission and scheduling, cannot realize high reliability and maintainability of the network, and has certain functional defects.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic switching protection system for an optical fiber circuit.
In order to solve the technical problems, the following technical scheme is adopted:
an optical fiber circuit automatic switching protection system comprises a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
Furthermore, the invention also comprises a GPRS communication module, wherein the GPRS communication module is connected with the communication end of the singlechip.
Further, the GPRS communication module is a GTM900C dual-band wireless module, and the GTM900C dual-band wireless module includes a power supply circuit, a serial communication circuit, and a SIM card peripheral circuit.
Furthermore, the optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an A/D conversion circuit, wherein the input end of the photoelectric converter is respectively connected with the output ends of the monitoring light sources of the first optical coupler and the second optical coupler, the output end of the photoelectric converter is connected into the A/D conversion circuit through the logarithmic amplification circuit, and the output end of the A/D conversion circuit is in communication connection with the single chip microcomputer.
Further, the light output quantity of the output end of the transmission light source of the first optical coupler is greater than the light output quantity of the output end of the monitoring light source, and the light output quantity of the output end of the transmission light source of the second optical coupler is greater than the light output quantity of the output end of the monitoring light source.
Further, the light output quantity of the output end of the light source transmitted by the first optical coupler accounts for 95% -99% of the total output, and the light output quantity of the output end of the light source transmitted by the second optical coupler accounts for 95% -99% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 1% -5% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 1% -5% of the total output.
Further, the light output quantity of the output end of the transmission light source of the first optical coupler accounts for 97% of the total output, and the light output quantity of the output end of the transmission light source of the second optical coupler accounts for 97% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 3% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 3% of the total output.
Further, the ratio of the transmission light source output end of the first optical coupler to the monitoring light source output end is the same as the ratio of the transmission light source output end of the second optical coupler to the monitoring light source output end.
Furthermore, the A/D conversion circuit is in communication connection with the single chip microcomputer through a CAN bus.
Furthermore, the single chip microcomputer is STM32F103ZET 6.
Further, the logarithmic amplifier circuit is a circuit with a core of a logarithmic amplifier AD 8304.
Further, the model of the optical path switcher is FWSW-2000, and is used for optical fiber transmission optical path selection.
Further, the first optical coupler and the second optical coupler are passive optical couplers.
The invention has the following beneficial effects:
the invention divides the service light into two parts through the optical splitter, and the two parts are respectively sent to the communication optical fiber route and the standby optical fiber route, one part of the light is distributed to the optical switch through the optical coupler by the communication optical fiber route and the standby optical fiber route and is used for alternative communication for optical terminal equipment, the other part of the light is distributed to the optical power detection circuit and is used for optical detection, once the problem that the optical fiber line connected in the communication optical fiber route or the standby optical fiber route has the problem and can not normally communicate is detected, the optical power detection circuit controls the optical switch to switch, the normal optical fiber line is selected, the normal transmission of the service is ensured, and the reliability of the transmission network is improved.
The invention relates to an optical power detection circuit, which is used for converting part of light detected by light into an electric signal through photoelectric conversion, and the purpose of photoelectric detection is achieved in a photon-electron quantum conversion mode, a PIN photodiode is generally selected, has good response speed, low noise characteristic and high sensitivity within the range of 1300-1600 nm due to small dark current, is very suitable for optical fiber communication, can process optical signals with the dynamic range of 80dB through a logarithmic amplification circuit and an AD8304 type logarithmic amplifier, has the maximum logarithmic linearity error of only 0.1dB and no shift error in measurement, and finally transmits the detection signals to a singlechip through an A/D conversion circuit. The A/D conversion circuit adopts a successive approximation type, and can meet the requirements of conversion speed and precision.
The invention has the advantages of small overall design, low power consumption and high reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic block diagram of the circuit of the present invention.
Fig. 2 is a schematic circuit block diagram of an optical power detection circuit according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail and fully with reference to fig. 1-2 and the following detailed description.
As shown in fig. 1 and fig. 2, an embodiment relates to an optical fiber line automatic switching protection system, which includes a communication optical fiber route, a backup optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switch, and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
As shown in fig. 2, the second embodiment relates to an automatic optical fiber line switching protection system, which further includes a GPRS communication module connected to a communication end of the single chip microcomputer on the basis of the first embodiment.
Further, the GPRS communication module is a GTM900C dual-band wireless module, and the GTM900C dual-band wireless module includes a power supply circuit, a serial communication circuit, and a SIM card peripheral circuit.
The third embodiment relates to an optical fiber circuit automatic switching protection system, on the basis of the first embodiment or the second embodiment, the optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an A/D conversion circuit, the input end of the photoelectric converter is respectively connected with the output ends of monitoring light sources of a first optical coupler and a second optical coupler, the output end of the photoelectric converter is connected into the A/D conversion circuit through the logarithmic amplification circuit, and the output end of the A/D conversion circuit is in communication connection with a single chip microcomputer.
The fourth embodiment relates to an automatic switching protection system for an optical fiber circuit, and on the basis of the third embodiment, the light output quantity of the output end of the transmission light source of the first optical coupler is greater than the light output quantity of the output end of the monitoring light source, and the light output quantity of the output end of the transmission light source of the second optical coupler is greater than the light output quantity of the output end of the monitoring light source.
The fifth embodiment relates to an automatic switching protection system for an optical fiber circuit, wherein on the basis of the fourth embodiment, the light output quantity of the output end of the transmission light source of the first optical coupler accounts for 95% -99% of the total output, and the light output quantity of the output end of the transmission light source of the second optical coupler accounts for 95% -99% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 1% -5% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 1% -5% of the total output.
The sixth embodiment relates to an automatic switching protection system for an optical fiber circuit, and on the basis of the fifth embodiment, the light output quantity of the output end of the transmission light source of the first optical coupler accounts for 97% of the total output, and the light output quantity of the output end of the transmission light source of the second optical coupler accounts for 97% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 3% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 3% of the total output.
The seventh embodiment relates to an automatic switching protection system for an optical fiber circuit, where on the basis of the fifth embodiment, the light output quantity at the output end of the transmission light source of the first optical coupler accounts for 98% of the total output, and the light output quantity at the output end of the transmission light source of the second optical coupler accounts for 98% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 2% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 2% of the total output.
An eighth embodiment relates to an optical fiber circuit automatic switching protection system, and on the basis of the fifth embodiment, the light output quantity of the output end of the transmission light source of the first optical coupler accounts for 95% of the total output, and the light output quantity of the output end of the transmission light source of the second optical coupler accounts for 95% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 5% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 5% of the total output.
The ninth embodiment relates to an optical fiber line automatic switching protection system, and on the basis of the fifth embodiment, the light output quantity of the output end of the transmission light source of the first optical coupler accounts for 96% of the total output, and the light output quantity of the output end of the transmission light source of the second optical coupler accounts for 96% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 4% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 4% of the total output.
The tenth embodiment relates to an automatic switching protection system for an optical fiber line, where on the basis of the fifth embodiment, the light output quantity at the output end of the transmission light source of the first optical coupler accounts for 99% of the total output, and the light output quantity at the output end of the transmission light source of the second optical coupler accounts for 99% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 1% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 1% of the total output.
An eleventh embodiment relates to an optical fiber line automatic switching protection system, and on the basis of the fourth embodiment, a ratio of a transmission light source output end and a monitoring light source output end of the first optical coupler is the same as a ratio of a transmission light source output end and a monitoring light source output end of the second optical coupler.
The embodiment twelfth relates to an optical fiber circuit automatic switching protection system, which comprises a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
The optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an A/D conversion circuit, wherein the input end of the photoelectric converter is respectively connected with the monitoring light source output ends of the first optical coupler and the second optical coupler, the output end of the photoelectric converter is connected into the A/D conversion circuit through the logarithmic amplification circuit, and the A/D conversion circuit is in communication connection with the single chip microcomputer through a CAN bus.
The embodiment thirteen relates to an automatic switching protection system of an optical fiber circuit, which comprises a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
The optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an A/D conversion circuit, wherein the input end of the photoelectric converter is respectively connected with the output ends of monitoring light sources of a first optical coupler and a second optical coupler, the output end of the photoelectric converter is connected into the A/D conversion circuit through the logarithmic amplification circuit, and the A/D conversion circuit is in communication connection with the single chip microcomputer through a CAN bus; the model of singlechip is STM32F103ZET 6.
The embodiment fourteen relates to an optical fiber circuit automatic switching protection system, which comprises a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
The optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an A/D conversion circuit, wherein the input end of the photoelectric converter is respectively connected with the output ends of monitoring light sources of a first optical coupler and a second optical coupler, the output end of the photoelectric converter is connected into the A/D conversion circuit through the logarithmic amplification circuit, and the A/D conversion circuit is in communication connection with the single chip microcomputer through a CAN bus; the logarithmic amplification circuit is a circuit with a logarithmic amplifier AD8304 as a core.
The embodiment fifteen relates to an automatic switching protection system for an optical fiber circuit, which comprises a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
The optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an A/D conversion circuit, wherein the input end of the photoelectric converter is respectively connected with the output ends of monitoring light sources of a first optical coupler and a second optical coupler, the output end of the photoelectric converter is connected into the A/D conversion circuit through the logarithmic amplification circuit, and the A/D conversion circuit is in communication connection with the single chip microcomputer through a CAN bus; the model of the light path switcher is FWSW-2000, and the light path switcher is used for selecting an optical fiber transmission light path.
The embodiment sixthly relates to an optical fiber circuit automatic switching protection system, which comprises a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
The optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an A/D conversion circuit, wherein the input end of the photoelectric converter is respectively connected with the output ends of monitoring light sources of a first optical coupler and a second optical coupler, the output end of the photoelectric converter is connected into the A/D conversion circuit through the logarithmic amplification circuit, and the A/D conversion circuit is in communication connection with the single chip microcomputer through a CAN bus; the type of the optical path switcher is FWSW-2000, and the optical path switcher is used for selecting an optical fiber transmission optical path; the first optical coupler and the second optical coupler are passive optical couplers.
The working principle of the above embodiment is as follows:
in the embodiment, the service light is divided into two parts by the optical splitter and respectively sent to the communication optical fiber route and the standby optical fiber route, one part of the light is distributed to the optical switch by the optical coupler for communication as a spare for optical terminal equipment, the other part of the light is distributed to the optical power detection circuit for optical detection, and once the situation that the optical fiber line connected in the communication optical fiber route or the standby optical fiber route has a problem and cannot normally communicate is detected, the optical switch is controlled to be switched by the optical power detection circuit, the normal optical fiber line is selected, the normal transmission of the service is ensured, and the reliability of a transmission network is improved.
The optical power detection circuit is used for converting part of light for optical detection into an electric signal through photoelectric conversion, and the purpose of photoelectric detection is achieved in a photon-electron quantum conversion mode, generally a PIN photodiode is selected, and has good response speed, low noise characteristic and high sensitivity within the range of 1300-1600 nm due to small dark current, so that the optical power detection circuit is very suitable for optical fiber communication, and then an AD8304 type logarithmic amplifier is adopted to process optical signals with the dynamic range of 80dB through a logarithmic amplification circuit, the maximum logarithmic linearity error is only 0.1dB, no shift error exists during measurement, and finally the detection signal is transmitted to a single chip microcomputer through an A/D conversion circuit. The A/D conversion circuit adopts a successive approximation type, and can meet the requirements of conversion speed and precision.
The embodiment has the advantages of small overall design, low power consumption and high reliability.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An optical fiber circuit automatic switching protection system is characterized by comprising a communication optical fiber route, a standby optical fiber route, an optical splitter, an optical switch, a first optical coupler, a second optical coupler, an optical power detection circuit, an optical path switcher and a single chip microcomputer; the input end of the optical splitter is connected with the output optical path of the optical terminal equipment, the optical fiber output end of the optical splitter is respectively connected with the communication optical fiber route and the standby optical fiber route, the output ends of the communication optical fiber route and the standby optical fiber route are respectively connected with the input ends of the first optical coupler and the second optical coupler, the output ends of the transmission light sources of the first optical coupler and the second optical coupler are respectively connected with the selected end of the optical switch, the monitoring light source output ends of the first optical coupler and the second optical coupler are respectively connected with the corresponding input ends of the optical power detection circuit, the output end of the optical power detection circuit is connected with the corresponding I/O end of the singlechip, the output end of the singlechip is connected with the optical path switcher, the output end of the optical path switcher is connected with the controlled end of the optical switch, and the output end of the optical switch is connected with the optical path input end of another optical terminal device.
2. The automatic switching protection system for optical fiber lines according to claim 1, further comprising a GPRS communication module, wherein the GPRS communication module is connected to the communication end of the single chip microcomputer.
3. The automatic switching protection system for the optical fiber circuit according to claim 1 or 2, wherein the optical power detection circuit comprises a photoelectric converter, a logarithmic amplification circuit and an a/D conversion circuit, an input end of the photoelectric converter is connected with output ends of the monitoring light sources of the first optical coupler and the second optical coupler respectively, an output end of the photoelectric converter is connected to the a/D conversion circuit through the logarithmic amplification circuit, and an output end of the a/D conversion circuit is in communication connection with the single chip microcomputer.
4. The system according to claim 3, wherein the light output of the output end of the transmission light source of the first optical coupler is greater than the light output of the output end of the monitoring light source, and the light output of the output end of the transmission light source of the second optical coupler is greater than the light output of the output end of the monitoring light source.
5. The automatic switching protection system for optical fiber circuit according to claim 4, wherein the light output of the output end of the transmission light source of the first optical coupler accounts for 95% -99% of the total output, and the light output of the output end of the transmission light source of the second optical coupler accounts for 95% -99% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 1% -5% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 1% -5% of the total output.
6. The system according to claim 5, wherein the light output of the output end of the transmission light source of the first optical coupler accounts for 97% of the total output, and the light output of the output end of the transmission light source of the second optical coupler accounts for 97% of the total output;
the light output quantity of the monitoring light source output end of the first optical coupler accounts for 3% of the total output, and the light output quantity of the monitoring light source output end of the second optical coupler accounts for 3% of the total output.
7. The automatic switching protection system for optical fiber circuit according to any one of claims 4 to 6, wherein the ratio of the output end of the transmission light source to the output end of the monitoring light source of the first optical coupler is the same as the ratio of the output end of the transmission light source to the output end of the monitoring light source of the second optical coupler.
8. The automatic switching protection system for optical fiber lines according to claim 3, wherein the A/D conversion circuit and the single chip microcomputer are in communication connection through a CAN bus.
9. The automatic switching protection system for the optical fiber circuit according to claim 1 or 2, wherein the single chip microcomputer is of the model STM32F103ZET 6.
10. The automatic switching protection system for optical fiber lines according to claim 3, wherein the logarithmic amplification circuit is a circuit with a core of logarithmic amplifier AD 8304.
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| CN201911324725.5A CN111049570A (en) | 2019-12-20 | 2019-12-20 | Automatic switching protection system for optical fiber circuit |
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| CN201911324725.5A CN111049570A (en) | 2019-12-20 | 2019-12-20 | Automatic switching protection system for optical fiber circuit |
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Application publication date: 20200421 |