CN102780596A - Real-time industrial Ethernet hardware system based on EPON (Ethernet Passive Optical Network) - Google Patents
Real-time industrial Ethernet hardware system based on EPON (Ethernet Passive Optical Network) Download PDFInfo
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- CN102780596A CN102780596A CN2012102404068A CN201210240406A CN102780596A CN 102780596 A CN102780596 A CN 102780596A CN 2012102404068 A CN2012102404068 A CN 2012102404068A CN 201210240406 A CN201210240406 A CN 201210240406A CN 102780596 A CN102780596 A CN 102780596A
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Abstract
The invention provides a real-time industrial Ethernet hardware system based on an EPON (Ethernet Passive Optical Network). The real-time industrial Ethernet hardware system comprises a center node and an access node; and the center node is connected with the access node through an optical fiber. In the center node, a main control module is respectively connected with a gigabit Ethernet module, a first SDRAM (Synchronous Dynamic Random Access Memory) module and a first ARM (Advanced RISC Machines) module; a first power supply module is connected with the main control module, the first SDRAM module and a high-speed series-to-parallel module; the first SDRAM module is connected with the high-speed series-to-parallel module; the high-speed series-to-parallel module is connected with a first optical fiber receiving and transmitting module. In the access node, a controller is respectively connected with a 10/100-bit Ethernet module, a second SDRAM module and a second ARM module; a second power supply module is connected with the controller, the second SDRAM module and a series-to-parallel conversion module; the second SDRAM module is connected with the series-to-parallel conversion module; and the series-to-parallel conversion module is connected with a second optical fiber receiving and transmitting module. The real-time industrial Ethernet hardware system provided by the invention has the advantages of higher bandwidth, good instantaneity and stronger anti-jamming capability.
Description
Technical field
The present invention relates to the EPA hardware system, especially a kind of real-time industrial ethernet hardware system.
Background technology
Field bus technique is difficult to form unified standard in the industrial control field for a long time, and intercommunication and interoperability problem are difficult to solve, thereby Ethernet gets into industrial control field.And along with the developing rapidly of EPA, broadband technical grade network system can the integrated data collection, exchanges data, real-time closed-loop control, video monitoring, information management, even intranet is interconnected, realizes many net unifications.For realizing these functions, not only bandwidth is big to require corresponding network system, and certain real-time will be arranged.Traditional industrial network system with hub (HUB) network forming adopts csma/collision detection (Carrier Sense Multiple Access/Collision Detect; CSMA/CD) communication mechanism; System conflicts rare when network is underloaded, but performance is unstable under the situation of heavy duty, and the packet transmission postpones very big sometimes; Even cause losing of packet; And the harsh noises of most of industry spot environment, electromagnetic interference etc. are easy to generate error code, thereby injure the safety of The whole control system, thereby and are not suitable for the application of industrial real-time FEEDBACK CONTROL.
The real-time ethernet technology is passed through to increase bandwidth, and makes network work under underload, improve the real-time of network as far as possible.But along with the development of industrial control network, it still is that complex environment such as antinoise interference is all had higher requirement in bandwidth, real-time, therefore can't satisfy the requirement of Industry Control.
Summary of the invention
In order to overcome the deficiency that limited bandwidth, real-time are relatively poor, antijamming capability is more weak of existing real-time industrial ethernet hardware system, the present invention provides a kind of real-time industrial ethernet hardware system based on EPON (Ethernet Passive Optical Network) that more high bandwidth, real-time are well, antijamming capability is stronger that has.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of real-time industrial ethernet hardware system based on EPON; Said real-time industrial ethernet hardware system comprises Centroid (Optical Line Terminal; OLT) and access node (Optical Network Unit, ONU), said Centroid is connected with said access node through optical fiber; Wherein,
Said Centroid comprises main control module, an ARM module, first power module, first synchronous DRAM (Synchronous Dynamic Random Access Memory; SDRAM) module, high speed string and modular converter, first optical fiber transceiver module and the Gigabit Ethernet module; Said main control module is connected with Gigabit Ethernet module, a SDRAM module and an ARM module respectively; Said first power module all is connected with said main control module, a SDRAM module and high speed string and modular converter; A said SDRAM module is connected with said high speed string and modular converter, and said high speed string and modular converter are connected with the first optical fiber transceiver module;
Said access node comprises controller, the 2nd ARM module, second source module, the 2nd SDRAM module, string and modular converter, the second optical fiber transceiver module and 10,000,000/100 m ethernet module; Said controller is connected with 10,000,000/100 m ethernet module, the 2nd SDRAM module and the 2nd ARM module respectively; Said second source module all is connected with said controller, the 2nd SDRAM module and string and modular converter; Said the 2nd SDRAM module is connected with said string and modular converter, and said string and modular converter are connected with the second optical fiber transceiver module.
Further, said Centroid also comprises first supplementary module, first Serial Peripheral Interface (Serial Peripheral Interface, SPI) bus module, a RS232 serial port module and a JTAG module; Said main control module is connected with said first supplementary module, a JTAG module, and a said ARM module is connected with the said first spi bus module, a RS232 serial port module.
Further, said access node also comprises second supplementary module, the second spi bus module, the 2nd RS232 serial port module and the 2nd JTAG module; Said controller is connected with said second supplementary module, the 2nd JTAG module, and said the 2nd ARM module is connected with the said second spi bus module, the 2nd RS232 serial port module.
Preferably, said main control module and controller be field programmable gate array (Field-Programmable Gate Array, FPGA).
Technical conceive of the present invention is: passive light Ethernet (Ethernet Passive Optical Network; EPON) network configuration of employing point-to-multipoint; Adopt in physical layer have transmission frequency bandwidth, the optical fiber connection of characteristics such as transmission capacity is big, anti-electromagnetic interference capability is strong, good confidentiality, cheap, environmental protection; And have repeater passive advantage fully, and merge with ethernet technology.This technology can provide bandwidth demand flexibly, and networking simultaneously is simple, reliable, high performance-price ratio.Therefore; From the angle of Ethernet passive optical network (EPON), use for reference the congenital advantage of its advanced technology and multiple spot control, be applied to industrial control network; Not only absorbed the advantage of optical fiber communication completely; And on the transmission bandwidth of network, real-time, also obtained revolutionary raising, and industrial control network is gone another step, be applied to complicated more high-precision motion control occasion.
Beneficial effect of the present invention mainly shows: EPON is applied to substitute the real-time ethernet in the industry spot in the industrial communication, makes it have higher real-time, bandwidth and anti-interference.Bandwidth allocation algorithm to classics improves, and sets about from the MAC layer, optimizes the MAC agreement, guarantees the real-time of network service.
Description of drawings
Fig. 1 is an OLT structural representation of the present invention;
Fig. 2 is an ONU structural representation of the present invention;
Fig. 3 is a connection sketch map of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1～Fig. 3, a kind of real-time industrial ethernet hardware system based on EPON, said real-time industrial ethernet hardware system comprises Centroid and access node, said Centroid is connected with said access node through optical fiber; Wherein,
Said Centroid comprises main control module, an ARM module, first power module, a SDRAM module, high speed string and modular converter, first optical fiber transceiver module and the Gigabit Ethernet module; Said main control module is connected with Gigabit Ethernet module, a SDRAM module and an ARM module respectively; Said first power module all is connected with said main control module, a SDRAM module and high speed string and modular converter; A said SDRAM module is connected with said high speed string and modular converter, and said high speed string and modular converter are connected with the first optical fiber transceiver module;
Said access node comprises controller, the 2nd ARM module, second source module, the 2nd SDRAM module, string and modular converter, the second optical fiber transceiver module and 10,000,000/100 m ethernet module; Said controller is connected with 10,000,000/100 m ethernet module, the 2nd SDRAM module and the 2nd ARM module respectively; Said second source module all is connected with said controller, the 2nd SDRAM module and string and modular converter; Said the 2nd SDRAM module is connected with said string and modular converter, and said string and modular converter are connected with the second optical fiber transceiver module.
Further, said Centroid also comprises first supplementary module, the first spi bus module, a RS232 serial port module and a JTAG module; Said main control module is connected with said first supplementary module, a JTAG module, and a said ARM module is connected with the said first spi bus module, a RS232 serial port module.
Further, said access node also comprises second supplementary module, the second spi bus module, the 2nd RS232 serial port module and the 2nd JTAG module; Said controller is connected with said second supplementary module, the 2nd JTAG module, and said the 2nd ARM module is connected with the said second spi bus module, the 2nd RS232 serial port module.
Preferably, said main control module and controller are FPGA.
The real-time industrial ethernet hardware system of present embodiment is made up of optical line terminal (OLT) and optical node (ONU).
The effect of each funtion part of OLT:
1, main control module FPGA: driving and the control optical fiber transceiver module of mainly accomplishing high speed string and modular converter as kernel control module; Make its transmitting-receiving that can coordinate to accomplish data, and accomplish the transmission of data through gigabit ethernet interface and first line of a couplet module communication.Wherein all functions adopt and realize with Verilog HDL language.
2, an ARM module: main effect is to assist FPGA to accomplish the conversion of corresponding protocol.
3, first power module: for each chip provides required normal working voltage.
4, a SDRAM: exchanges data buffer chip.
5, at a high speed string and modular converter: the data and the data of FPGA end of fiber optical transceiver end are gone here and there and changed the needs that satisfy its transmitting-receiving processing.
6, the first optical fiber transceiver module: be responsible for the conversion of photosignal and the transmission of light signal.
7, first supplementary module: mainly comprising trigger switch and LED lamp, mainly is to accomplish triggering and the indication of signal specific so that we check whether OLT is in proper working order.
8, the first spi bus module is mainly accomplished the initialization and the debug function of program.
9, a RS232 serial port module: being responsible for the transmission and the reception of rs 232 serial interface signal, mainly is the low-level configuration and the management of equipment.
10, Gigabit Ethernet module: adopt the gigabit Ethernet control chip to link to each other with the RJ-45 interface, the data that mainly receive the scene, upper strata send FPGA to, and send after the signal encoding that FPGA is brought.
11, the program download interface of a JTAG:FPGA
The effect of each funtion part of OLT:
1, controller FPGA: main driving and the control optical fiber transceiver module of accomplishing string at a high speed and modular converter makes its transmitting-receiving that can coordinate to accomplish data, and communicates through DM9000 Ethernet chip and control computer.
2, the 2nd ARM module: accomplish the conversion of corresponding protocol as the coprocessor of FPGA.
3, second source module: for each chip provides required normal working voltage.
4, the 2nd SDRAM: exchanges data buffer chip.
5, string and modular converter: the data of fiber optical transceiver end and the data of FPGA end are gone here and there and changed the needs that satisfy its transmitting-receiving processing.
6, the second optical fiber transceiver module: be responsible for the conversion of photosignal and the transmission of light signal, the Data Receiving that will receive from the OLT termination sends to OLT to the data of getting off simultaneously control end.
7, second supplementary module: mainly comprising trigger switch and LED lamp, mainly is to accomplish triggering and the indication of signal specific so that we check whether OLT is in proper working order.
8, the second spi bus module is mainly accomplished the initialization and the debug function of program.
9, the 2nd RS232 serial port module: being responsible for the transmission and the reception of rs 232 serial interface signal, mainly is the low-level configuration and the management of equipment.
10,10,000,000/100 m ethernet module: the 10M/100M ethernet control chip, link to each other with the RJ-45 interface, the data of mainly FPGA being brought send to FPGA after sending to the control computer and will controlling the signal encoding that computer brings.
11, the program download interface of the 2nd JTAG:FPGA.
The above only is preferred embodiment of the present invention, the present invention is not done pro forma restriction, and every simple modification, equivalent variations and modification of above instance being done according to the present invention all still belongs in the scope of technical scheme of the present invention.
Claims (4)
1. real-time industrial ethernet hardware system based on EPON, it is characterized in that: said real-time industrial ethernet hardware system comprises Centroid and access node, said Centroid is connected with said access node through optical fiber; Wherein,
Said Centroid comprises main control module, an ARM module, first power module, a SDRAM module, high speed string and modular converter, first optical fiber transceiver module and the Gigabit Ethernet module; Said main control module is connected with Gigabit Ethernet module, a SDRAM module and an ARM module respectively; Said first power module all is connected with said main control module, a SDRAM module and high speed string and modular converter; A said SDRAM module is connected with said high speed string and modular converter, and said high speed string and modular converter are connected with the first optical fiber transceiver module;
Said access node comprises controller, the 2nd ARM module, second source module, the 2nd SDRAM module, string and modular converter, the second optical fiber transceiver module and 10,000,000/100 m ethernet module; Said controller is connected with 10,000,000/100 m ethernet module, the 2nd SDRAM module and the 2nd ARM module respectively; Said second source module all is connected with said controller, the 2nd SDRAM module and string and modular converter; Said the 2nd SDRAM module is connected with said string and modular converter, and said string and modular converter are connected with the second optical fiber transceiver module.
2. the real-time industrial ethernet hardware system based on EPON as claimed in claim 1 is characterized in that: said Centroid also comprises first supplementary module, the first spi bus module, a RS232 serial port module and a JTAG module; Said main control module is connected with said first supplementary module, a JTAG module, and a said ARM module is connected with the said first spi bus module, a RS232 serial port module.
3. according to claim 1 or claim 2 real-time industrial ethernet hardware system based on EPON, it is characterized in that: said access node also comprises second supplementary module, the second spi bus module, the 2nd RS232 serial port module and the 2nd JTAG module; Said controller is connected with said second supplementary module, the 2nd JTAG module, and said the 2nd ARM module is connected with the said second spi bus module, the 2nd RS232 serial port module.
4. according to claim 1 or claim 2 the real-time industrial ethernet hardware system based on EPON, it is characterized in that: said main control module and controller are FPGA.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103647728A (en) * | 2013-12-07 | 2014-03-19 | 成都亿盟恒信科技有限公司 | STM32 single chip microcomputer and Linux system high-speed series port anti-interference communication method |
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| EP2357738A1 (en) * | 2008-10-31 | 2011-08-17 | Huawei Technologies Co., Ltd. | Information transfer and receiving method, system, and device |
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| EP2357738A1 (en) * | 2008-10-31 | 2011-08-17 | Huawei Technologies Co., Ltd. | Information transfer and receiving method, system, and device |
Non-Patent Citations (2)
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| 曹铮等: "基于ARM9的EPON OLT硬件设计与实现", 《光通信技术》 * |
| 朱雁程等: "基于ARM的EPON体系中ONU硬件设计", 《网络与系统》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103647728A (en) * | 2013-12-07 | 2014-03-19 | 成都亿盟恒信科技有限公司 | STM32 single chip microcomputer and Linux system high-speed series port anti-interference communication method |
| CN103647728B (en) * | 2013-12-07 | 2016-06-08 | 成都亿盟恒信科技有限公司 | A kind of STM32 micro-chip and Linux system high-speed serial ports Anti-jamming Communication method |
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