CN109061806B - Frame type multi-path optical switch based on FPGA - Google Patents
Frame type multi-path optical switch based on FPGA Download PDFInfo
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- CN109061806B CN109061806B CN201810818838.XA CN201810818838A CN109061806B CN 109061806 B CN109061806 B CN 109061806B CN 201810818838 A CN201810818838 A CN 201810818838A CN 109061806 B CN109061806 B CN 109061806B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23051—Remote control, enter program remote, detachable programmer
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- Automation & Control Theory (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
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Abstract
The invention discloses a frame type multi-path optical switch based on an FPGA (field programmable gate array), belonging to the technical field of optical fiber communication testing. The invention uses FPGA as a control core, integrates a fiber channel switching module inside, adopts a rack-mounted structural design, is connected by RS-485 or Ethernet, and realizes the switching of fiber channels by computer control. The FPGA is used as a control core of the rack-mounted multi-path optical switch to realize three main functional modules: the device comprises a communication control module, a digital control module and a display module. The communication control module realizes communication between the equipment and the PC, and the PC can send or read back channel switching information to the equipment through RS-485 or Ethernet connection; the digital control module realizes the channel setting of the optical fiber switching module; the display module displays the switching state of the current optical switch on the front panel LCD. The invention solves the problem of switching the multi-channel 48x1 optical fiber channels under the condition of meeting the requirement of lower insertion loss, and achieves the effect of integrating low-loss optical channel switching and remote control.
Description
Technical Field
The invention discloses a frame type multi-path optical switch based on an FPGA (field programmable gate array), belonging to the technical field of optical fiber communication testing.
Background
Optical switches of various switching principles and implementation techniques in optical transport networks are widely proposed. Optical switches of different principles and technologies have different characteristics and are suitable for different situations. Optical switches can be divided into, according to different optical switch principles: mechanical optical switches, magneto-optical switches, thermo-optical switches, electro-optical switches, and acousto-optical switches. Depending on the switching medium of the optical switch, the optical switch can be divided into: free space switching optical switches and waveguide switching optical switches.
The multi-path optical switch module is an electronic functional device with the function of switching optical paths, and is used for multi-path optical monitoring, Ethernet, multi-light source, detector switching, protection switching of the Ethernet and the like in an optical fiber transmission system; the optical fiber testing system is used for optical fiber and optical fiber device testing, network testing and optical fiber sensing multi-point monitoring systems. An optical add/drop multiplexer can drop or add a single optical wavelength signal to a multi-wavelength optical signal.
Multipath optical switch modules and optical add/drop multiplexers are the key of all-optical networks, and they can manage signals of any wavelength, thereby more fully utilizing bandwidth. However, the existing multi-path optical switch has defects and shortcomings of different degrees, the number of imported product channels is small, the price is high, and the system expansion cost is high. At present, some similar products exist in China, but the defects of large insertion loss, lack of remote control function and the like exist.
Disclosure of Invention
The invention aims to provide a method for integrating low-loss optical channel switching and remote control in order to realize multi-channel 48x1 optical channel switching under the condition of meeting low insertion loss. On one hand, the optical switch system is not limited to be far away from the physical distance, and on the other hand, the system after being assembled can be conveniently remotely controlled and maintained.
The technical scheme of the invention is that the frame type multi-path optical switch based on FPGA comprises: the system comprises a computer system, an FPGA control module, an I/O isolation module, an optical switching module, a power supply module, a display module and a rack;
a computer system: the FPGA control module is controlled by the main light path switching controller;
the FPGA control module: according to the instruction received from the computer system, outputting a control signal to the I/O isolation module to control the operation of the optical switching module, and realizing the switching of the corresponding optical channel;
the I/O isolation module is used for realizing the isolation and the conversion from the discrete control signal output by the FPGA to the optical switching module;
the optical switching module is used for realizing the switching from different input optical paths to different output optical paths;
the power supply module realizes the power supply of the whole system and supports the power supply of all the modules;
the display module displays the switching state of the current optical switch on the front panel LCD;
a frame: installing and integrating all the modules on a rack by adopting a standard upper rack type case;
the control and data receiving algorithm of the FPGA control module is compiled by adopting a hardware description language, so that the information interaction between the multi-path optical switch and a computer system is realized; the FPGA control module is connected with the I/O isolation module and the control end signal of the optical switching module, and outputs a control signal to the I/O isolation module according to an instruction received from a computer system to control the operation of the optical switching module so as to realize the switching of the corresponding optical channel;
1) the FPGA control module is connected with a computer system through a bus, and the computer system sends an instruction to the FPGA control module according to the agreement of a communication protocol;
2) the FPGA control module acquires control instruction information sent by a computer system through a bus, analyzes the control instruction information into a control output signal, and then sets a signal state of a corresponding I/O output pin to control the optical switching module;
3) the FPGA control module converts the control instruction information into LCD display data, and the LCD display data is sent to the LCD through a Serial Peripheral Interface (SPI) to realize the real-time display of the control information instruction;
the chassis is a standard 19-inch upper-frame chassis, the front panel is an optical fiber flange, a channel information switching LCD (liquid crystal display), the rear panel is a communication connector and an AC220V power supply socket, the chassis is designed by aluminum alloy sections, and the surface drawing process is adopted.
And the control and data receiving algorithm of the FPGA control module is written by adopting a Verilog HDL hardware description language.
The FPGA control module is connected with a computer system through an Ethernet or an RS-485 bus.
The connection relation between the FPGA control module and the I/O isolation module and the optical switching module is as follows: the input circuit is composed of an I/O isolation module circuit; the output circuit consists of an FPGA control module control output circuit and an LCD liquid crystal display module; the input end of the input circuit is connected with the output end of the FPGA control module control output circuit, and the output end of the input circuit is connected with the digital input channel of the optical switching module.
The optical switching module adopts an optical fiber switching module based on MEMS to reduce the insertion loss of the multi-path optical switch, and the channel connection of the internal optical fiber switching module adopts a fusion technology to be directly connected.
The invention has the advantages that: the core technology of the FPGA-based rack-mounted multi-path optical switch is mainly to realize the control of an optical switching module and the RS-485 or TCP/IP network transmission through the FPGA, solve the problems encountered by large-scale optical channel switching and have the following advantages:
1. the remote control is easy;
2. the cost is obviously reduced;
3. the optical fiber channel topological structure is easy to store and restore;
4. the channel insertion loss is effectively reduced;
5. the channel switching state can be acquired.
Drawings
FIG. 1 is a schematic control flow diagram of the present invention;
FIG. 2 is a communication control flow diagram of the present invention;
fig. 3 is a functional block diagram of the present invention.
Detailed Description
Frame-type multichannel photoswitch based on FPGA, it includes: the system comprises a computer system, an FPGA control module, an I/O isolation module, an optical switching module, a power supply module, a display module and a rack;
a computer system: the FPGA control module is controlled by the main light path switching controller;
the FPGA control module: according to the instruction received from the computer system, outputting a control signal to the I/O isolation module to control the operation of the optical switching module, and realizing the switching of the corresponding optical channel;
the I/O isolation module is used for realizing the isolation and the conversion from the discrete control signal output by the FPGA to the optical switching module;
the optical switching module is used for realizing the switching from different input optical paths to different output optical paths;
the power supply module realizes the power supply of the whole system and supports the power supply of all the modules;
the display module displays the switching state of the current optical switch on the front panel LCD;
a frame: installing and integrating all the modules on a rack by adopting a standard upper rack type case;
the control and data receiving algorithm of the FPGA control module is compiled by adopting a hardware description language, so that the information interaction between the multi-path optical switch and a computer system is realized; the FPGA control module is connected with the I/O isolation module and the control end signal of the optical switching module, and outputs a control signal to the I/O isolation module according to an instruction received from a computer system to control the operation of the optical switching module so as to realize the switching of the corresponding optical channel;
1) the FPGA control module is connected with a computer system through a bus, and the computer system sends an instruction to the FPGA control module according to the agreement of a communication protocol;
2) the FPGA control module acquires control instruction information sent by a computer system through a bus, analyzes the control instruction information into a control output signal, and then sets a signal state of a corresponding I/O output pin to control the optical switching module;
3) the FPGA control module converts the control instruction information into LCD display data, and the LCD display data is sent to the LCD through a Serial Peripheral Interface (SPI) to realize the real-time display of the control information instruction;
the chassis is a standard 19-inch upper-frame chassis, the front panel is an optical fiber flange, a channel information switching LCD (liquid crystal display), the rear panel is a communication connector and an AC220V power supply socket, the chassis is designed by aluminum alloy sections, and the surface drawing process is adopted.
And the control and data receiving algorithm of the FPGA control module is written by adopting a Verilog HDL hardware description language.
The FPGA control module is connected with a computer system through an Ethernet or an RS-485 bus.
The connection relation between the FPGA control module and the I/O isolation module and the optical switching module is as follows: the input circuit is composed of an I/O isolation module circuit; the output circuit consists of an FPGA control module control output circuit and an LCD liquid crystal display module; the input end of the input circuit is connected with the output end of the FPGA control module control output circuit, and the output end of the input circuit is connected with the digital input channel of the optical switching module.
The optical switching module adopts an optical fiber switching module based on MEMS to reduce the insertion loss of the multi-path optical switch, and the channel connection of the internal optical fiber switching module adopts a fusion technology to be directly connected.
The present invention will be described in further detail with reference to the accompanying drawings. The invention uses FPGA as a control core, integrates a fiber channel switching module inside, adopts a rack-mounted structural design, is connected by RS-485 or Ethernet, and realizes the switching of fiber channels by computer control.
The rack type multi-path optical switch adopts a standard 19-inch upper rack type case, a front panel is an optical fiber flange, a channel information switching LCD, a rear panel is a communication connector and an AC220V power supply socket, the case is designed by aluminum alloy profiles, and the surface is processed by a wire drawing process.
The FPGA is used as a control core of the rack-mounted multi-path optical switch to realize three main functional modules: the device comprises a communication control module, a digital control module and a display module. The communication control module realizes communication between the equipment and the PC, and the PC can send or read back channel switching information to the equipment through RS-485 or Ethernet connection; the digital control module realizes the channel setting of the optical fiber switching module; the display module displays the switching state of the current optical switch on the front panel LCD.
Frame-type multichannel photoswitch based on FPGA: the instrument includes: the device comprises an FPGA control module, an I/O isolation module, an optical switching module, a power supply module and a display module.
The FPGA control module is connected with a computer system through a network or an RS-485 bus, and the computer system sends an instruction to the FPGA control module according to the agreement of a communication protocol.
The FPGA control module is connected with the I/O isolation module and the optical switching module, and outputs a control signal according to the instruction received by the FPGA control module to control the optical switching module through the I/O isolation module, so that switching of multiple optical channels is realized.
The computer system controls the rack-type multi-path optical switch and manages the equipment information.
The apparatus of the present invention comprises: the device comprises an FPGA control module, an I/O isolation module, an optical switching module, a power supply module and a display module.
An input circuit: I/O isolation module circuit; an output circuit: the LCD display module is composed of an output circuit controlled by an FPGA control module and an LCD liquid crystal display module; the input end of the input circuit is connected with the output end of the output circuit controlled by the FPGA control module, and the output end of the input circuit is connected with the digital input channel of the optical switching module.
In order to reduce the insertion loss of the multi-path optical switch, the instrument adopts an optical fiber switching module based on MEMS, and the channel connection of the internal optical fiber switching module is directly connected by adopting a fusion technology. The MEMS-based optical fiber switching module has good repeatability, low insertion loss and almost lossless long switching life.
The FPGA is connected with the RS-485 or LAN interface chip through a digital signal channel, and a control and data receiving algorithm is written by adopting Verilog HDL hardware description language. And realizing the information interaction between the multi-path optical switch and the computer system.
The FPGA control module acquires control instruction information sent by the computer system through the RS-485 or LAN interface, receives and analyzes the control instruction information into a control output signal, and sets the signal state (high level or low level) of a corresponding I/O output pin to realize the control of the optical switching module. The FPGA simultaneously converts the control information into LCD display data, and the display data is sent to the LCD through the SPI, so that the real-time display of the control information is realized.
Claims (5)
1. Frame-type multichannel photoswitch based on FPGA, its characterized in that, it includes: the system comprises a computer system, an FPGA control module, an I/O isolation module, an optical switching module, a power supply module, a display module and a rack;
a computer system: the FPGA control module is controlled by the main light path switching controller;
the FPGA control module: according to the instruction received from the computer system, outputting a control signal to the I/O isolation module to control the operation of the optical switching module, and realizing the switching of the corresponding optical channel;
the I/O isolation module is used for realizing the isolation and the conversion from the discrete control signal output by the FPGA to the optical switching module;
the optical switching module is used for realizing the switching from different input optical paths to different output optical paths;
the power supply module realizes the power supply of the whole system and supports the power supply of all the modules;
the display module displays the switching state of the current optical switch on the front panel LCD;
a frame: installing and integrating all the modules on a rack by adopting a standard upper rack type case;
the control and data receiving algorithm of the FPGA control module is compiled by adopting a hardware description language, so that the information interaction between the multi-path optical switch and a computer system is realized; the FPGA control module is connected with the I/O isolation module and the control end signal of the optical switching module, and outputs a control signal to the I/O isolation module according to an instruction received from a computer system to control the operation of the optical switching module so as to realize the switching of the corresponding optical channel;
1) the FPGA control module is connected with a computer system through a bus, and the computer system sends an instruction to the FPGA control module according to the agreement of a communication protocol;
2) the FPGA control module acquires control instruction information sent by a computer system through a bus, analyzes the control instruction information into a control output signal, and then sets a signal state of a corresponding I/O output pin to control the optical switching module;
3) the FPGA control module converts the control instruction information into LCD display data, and the LCD display data is sent to the LCD through a Serial Peripheral Interface (SPI) to realize the real-time display of the control information instruction;
4) the input circuit is composed of an I/O isolation module circuit; the output circuit consists of an FPGA control module control output circuit and an LCD liquid crystal display module; the input end of the input circuit is connected with the output end of the FPGA control module control output circuit, and the output end of the input circuit is connected with the digital input channel of the optical switching module.
2. The FPGA-based rack-mounted multi-channel optical switch of claim 1 wherein said chassis is a standard 19 inch shelf-mounted chassis, the front panel is a fiber flange, the channel information switching LCD, the back panel is a communication connector and an AC220V power outlet, the chassis is designed from aluminum alloy profiles and treated with a surface wire drawing process.
3. The FPGA-based rack-mounted multi-channel optical switch of claim 1, wherein the control and data receiving algorithms of said FPGA control module are written in Verilog HDL hardware description language.
4. The FPGA-based rack-mounted multi-channel optical switch of claim 1, wherein said FPGA control module is connected to a computer system via an ethernet or RS-485 bus.
5. The FPGA-based rack-mounted multi-channel optical switch of claim 1, wherein the optical switch module employs a MEMS-based fiber switch module to reduce insertion loss of the multi-channel optical switch, and the internal fiber switch module channel connections are directly connected using a fusion splicing technique.
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| CN201810818838.XA CN109061806B (en) | 2018-07-24 | 2018-07-24 | Frame type multi-path optical switch based on FPGA |
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| CN201810818838.XA CN109061806B (en) | 2018-07-24 | 2018-07-24 | Frame type multi-path optical switch based on FPGA |
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| CN201178482Y (en) * | 2008-03-18 | 2009-01-07 | 天津光电通信技术有限公司 | Large capacity strict blocking-free intelligent light cross connecting apparatus |
| CN203573011U (en) * | 2013-10-29 | 2014-04-30 | 中通服节能技术服务有限公司 | Flexibly configured optical switching device |
| CN104935376A (en) * | 2014-03-19 | 2015-09-23 | 上海光维通信技术股份有限公司 | Optical power measuring device |
| CN204101263U (en) * | 2014-10-11 | 2015-01-14 | 北京畅通达通信技术有限公司 | The equipment of a kind of optical switch device and detection intelligent electronic device |
| WO2017147389A1 (en) * | 2016-02-26 | 2017-08-31 | Honeywell International Inc. | Optical switch with reflection disk in explosion-proof gas detector |
| CN206585588U (en) * | 2017-03-09 | 2017-10-24 | 湖北微源卓越科技有限公司 | Data unidirectional transmission equipment based on photoswitch |
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