CN204031180U - A kind of fiber optic Ethernet communication interface for magnetic resonance imaging system - Google Patents
A kind of fiber optic Ethernet communication interface for magnetic resonance imaging system Download PDFInfo
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- CN204031180U CN204031180U CN201320357868.8U CN201320357868U CN204031180U CN 204031180 U CN204031180 U CN 204031180U CN 201320357868 U CN201320357868 U CN 201320357868U CN 204031180 U CN204031180 U CN 204031180U
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- fiber
- optical transceiver
- ethernet
- interface
- imaging system
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Abstract
The utility model discloses a kind of fiber optic Ethernet communication interface for magnetic resonance imaging system.This interface is comprised of ethernet controller U7, fiber optical transceiver U6, multimode fiber, 100M multimode fiber network interface card.The downlink data that computer U5 sends is the MT-RJ port to fiber optical transceiver U6 through 100M multimode fiber network interface card SC port transmission, and the photoelectric conversion module of fiber optical transceiver U6 receiving terminal is converted to the signal of telecommunication by light signal and transfers to ethernet controller U7 input through difference matching network; The signal of telecommunication of ethernet controller U7 output transfers to fiber optical transceiver U6 after difference matching network, and the photoelectric conversion module of fiber optical transceiver U6 transmitting terminal converts electrical signals to light signal and through MT-RJ interface, by multimode fiber, transfers to computer U5 again.The utility model is usingd optical fiber and is realized ethernet communication as transmission medium, has that transmission rate is fast, loss is little, be not subject to the features such as outside electromagnetic interference.
Description
Technical field
The utility model relates to network communication field, relates in particular to a kind of fiber optic Ethernet communication interface for magnetic resonance imaging system, in order to complete the exchanges data between spectrometer and computer in magnetic resonance imaging system.
Background technology
Ethernet (Ethernet) is the most general communication protocol standard that current local area network (LAN) adopts.Ethernet is carried out IEEE802.3 standard, in the mode of CSMA/CD (Carrier Sense Multiple Access/Collision Detect, Carrier Sense Multiple Access/collision detection mechanism), works.Along with the increase of transmitting data stream amount, traditional standard Ethernet (message transmission rate is 10Mbps) is difficult to meet the demands, and nineteen ninety-five, IEEE has issued IEEE802.3u Fast Ethernet standard.Fast Ethernet is different according to transmission medium, is divided into 100BASE-TX, 100BASE-FX, tri-subclasses of 100BASE-T4, wherein, 100BASE-TX is used two pairs of 5 class unshielded twisted pairs, a pair of for sending data, a pair of for receiving data, adopt 4B/5B coded system; 100BASE-FX is used two strands of optical fiber, and wherein one is for sending data, and one is for receiving data, and available monomode fiber or multimode fiber adopt the coded system of 4B/5B; 100BASE-T4 is used 4 pairs 3,4,5 class unshielded twisted pair or Shielded Twisted Pairs, and wherein three pairs for transmitting data, and a pair of transmission of carrying out collision detection and control signal receives, and adopts the coded system of 8B/6T.
Spectrometer is one of key equipment of magnetic resonance imaging system, and it controls the sequential of whole magnetic resonance imaging system and the generation of various waveform signals, transmitting, reception and processing.Exchanges data between spectrometer and computer adopts the form of Ethernet transmission to realize more, generally uses twisted-pair feeder as the transmission medium of ethernet communication, and this transmission means has the shortcomings such as transmission rate is slow, poor anti jamming capability.Using optical fiber as the 100BASE-FX Ethernet of transmission medium, and the advantage such as have that loss is little, transmission rate fast, long transmission distance, antijamming capability are strong, is highly suitable for the requirement of modern magnetic resonance imaging system to imaging time, picture quality.
Summary of the invention
The purpose of this utility model is to provide a kind of fiber optic Ethernet communication interface for magnetic resonance imaging system, and it is for realizing the exchanges data between magnetic resonance imaging system Computer and spectrometer.
The utility model adopts the multimode fiber network interface card of the ethernet controller, the fiber optical transceiver that meets FDDI PMD standard, multimode fiber and the 100M that support IEEE802.3u standard.Between the SC port of the MT-RJ optical fiber interface of fiber optical transceiver and 100M multimode fiber network interface card, by multimode fiber, be connected; Fiber optical transceiver transmitting terminal TD is connected with the fiber-optic signal output TPFOP/N of ethernet controller respectively after difference matching network; Fiber optical transceiver receiving terminal RD is connected with the input TPFIP/N of ethernet controller respectively after difference matching network; The input port SD of fiber optical transceiver is connected with the SD/TP of ethernet controller end.
Further, the message transmission rate of ethernet communication module of the present utility model is 100Mbps.
Further, the utility model ethernet controller and fiber optical transceiver all adopt 3.3V Power supply.
The beneficial effects of the utility model are:
The optical fiber of usining is realized the network service between computer and spectrometer as transmission medium, has that transmission rate is fast, loss is little, be not subject to the features such as outside electromagnetic interference.
How below in conjunction with accompanying drawing, further illustrate the purpose of this utility model realizes:
Accompanying drawing explanation
Figure 1 shows that the ethernet interface structured flowchart of applicable conventional MRI imaging system of the present utility model.
Figure 2 shows that the structured flowchart of fiber optic Ethernet communication interface of the present utility model.
Figure 3 shows that the schematic diagram of fiber optic Ethernet communication interface of the present utility model.
Wherein:
U1, U5: computer
U2:RJ-45 interface, ethernet interface
U3: network transformer, its function is requirement and undistorted the ethernet signal that transmits that meets IEEE802.3 electrical isolation
U4: support the ethernet controller of 100BASE-TX standard, network communication interface circuit, for controlling the transmission of network service data
U6: fiber optical transceiver, its function is to realize the conversion of light signal and the signal of telecommunication
U7: the ethernet controller of supporting 100BASE-FX standard
Embodiment
Figure 1 shows that the structured flowchart of applicable conventional ethernet interface of the present utility model.In conventional MRI imaging system, adopt twisted-pair feeder to realize ethernet communication as transmission medium.Computer U1 host interface adopts the Ethernet card with RJ-45 interface.Twisted pair line connection is between Ethernet card and RJ-45 interface.During work, the upstream data. signals being sent by the TPFOP/N end of ethernet controller U4 enters from network transformer U3 receiving terminal RX, by RJ-45 interface U2, then by being sent to computer U1 after twisted-pair feeder; The downlink data being sent by computer U1, through twisted-pair feeder and the laggard transmitting terminal TX that enters network transformer U3 of RJ-45 interface U2, is then sent to the TPFIP/N end of ethernet controller U4.
Figure 2 shows that the structured flowchart of fiber optic Ethernet communication interface of the present utility model.The LXT971A chip of the IEEE802.3u standard of following that the ethernet controller U7 that the utility model adopts is produced by American I ntel company.This chip is supported 100BASE-T, 100BASE-TX, 100BASE-FX Ethernet speed standard.The HFBR-5903 chip that the fiber optical transceiver U6Wei U.S. Agilent company that the utility model adopts produces, this chip meets FDDI PMD standard, supports IEEE802.3u agreement, has MT-RJ optical fiber interface.The utility model adopts the fiber optic Ethernet card of supporting PCI-X bus, and it has the access of 100Mbps Ethernet optical fiber, can work in complete/semiduplex mode, supports IEEE802.3u100BASE-FX Ethernet protocol standard, and interface adopts SC port.
The SC port (fiber port) of multimembrane mould fibre web card and the MT-RJ interface (optical fiber interface) of fiber optical transceiver U6 of computer U5 are connected by multimode fiber, and the transmitting terminal TD of fiber optical transceiver U6 is connected with input TPFIP/N with the output TPFOP/N of ethernet controller U7 respectively by difference matching network with receiving terminal RD.
Figure 3 shows that ethernet communication circuit theory diagrams of the present utility model.The analog power VCCA of ethernet controller U7 and digital power VCCD adopt 3.3V voltage, and capacitor C 1, C2, C3 form the filter circuit of digital power, and capacitor C 4, C5, C6 and inductance L 1 form the filter circuit of analog power.The transmitting terminal power supply TxVcc of fiber optical transceiver U6 and receiving terminal RxVcc power supply all adopt 3.3V, and capacitor C 10, C11, C12, C13, C14 and inductance L 2, L3 form electric source filter circuit.The transmitting terminal earth signal TxVee of fiber optical transceiver U6 is coupled to ground by capacitor C 9 after being connected with receiving terminal earth signal RxVee one end.The electric source filter circuit that electric capacity, inductance form is for the disturbing pulse of filtering input power.
When ethernet controller U7 works in 100BASE-FX pattern, its output and input transmission difference LVPECL signal (Low Voltage Positive Emitter-Couple Logic, the i.e. emitter coupled logic level of low positive pressure).LVPECL is used 3.3V or 2.5V power supply.Between LVPECL and PECL, need to realize level match by difference matching network equivalent electric circuit.In the utility model, resistance R 1, R2, R3, R4 and capacitor C 7 form the output LVPECL signal of ethernet controller U7 and the coupling path between the receiving terminal PECL signal of fiber optical transceiver U6.Resistance R 7, R8, R9, R10 and capacitor C 8 form the input LVPECL signal of ethernet controller U7 and the coupling path between fiber optical transceiver receiving terminal PECL signal.
The SD/TP end of ethernet controller U7 can be worked under two kinds of patterns, and during 100BASE-FX pattern, SD/TP termination is received the SD signal from fiber optical transceiver; During 100BASE-TP pattern, SD/TP end is by pull down resistor ground connection.Whether, in the utility model, SD/TP end is connected with fiber optical transceiver SD end, normal for detection of input serial signal level.One end ground connection after resistance R 5, R6 series connection, the other end connects 3.3V power supply.Resistance R 5, R6 are connected between ethernet controller U7 and fiber optical transceiver U6 for direct-current coupling path is provided.When input serial signal level is too low (as optical fiber fails to be normally connected with MT-RJ interface), fiber optical transceiver SD holds output low level (logical zero), when input serial signal level is normal, fiber optical transceiver SD holds output logic high level (logical one).
During work, the upstream data. signals being sent by ethernet controller U7 output port TPFOP, TPFON is entered by fiber optical transceiver U6 transmitting terminal TD+, TD-, the transmitting terminal circuit of fiber optical transceiver U6 is converted to light signal by differential voltage signal, light signal is sent into computer U5 after the MT-RJ interface of fiber optical transceiver U6 transfers to multimode fiber network interface card SC port after multimode fiber, completes thus by the transmitting uplink data between ethernet controller U7 and computer U5; The downlink data being sent by computer U5, MT-RJ port by multimode fiber network interface card SC port transmission to fiber optical transceiver U6, fiber optical transceiver U6 receiving terminal circuit is converted to differential voltage signal by light signal, differential signal transfers to input TPFIP, the TPFIN of ethernet controller U7 after difference matching network, realizes thus the transmission to the downlink data signal of ethernet controller U7 by computer U5.
The message transmission rate of this fiber optic Ethernet communication module is 100Mbps, and wavelength is 1300nm, and optical fiber interface is respectively MT-RJ, SC, and optical fiber kind is multimode.The resistance of this fiber optic Ethernet communication module and electric capacity all adopt SMD.
The foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (5)
1. the fiber optic Ethernet communication interface for magnetic resonance imaging system, comprise ethernet controller, fiber optical transceiver, multimode fiber, 100M multimode fiber network interface card, it is characterized in that, between the SC port of the MT-RJ optical fiber interface of fiber optical transceiver and 100M multimembrane optical fiber network interface card, by multimode fiber, be connected; Fiber optical transceiver transmitting terminal TD is connected with the fiber-optic signal output TPFOP/N of ethernet controller after difference matching network; Fiber optical transceiver receiving terminal RD is connected with the input TPFIP/N of ethernet controller after difference matching network; The input SD of fiber optical transceiver is connected with the SD/TP of ethernet controller end.
2. the fiber optic Ethernet communication interface for magnetic resonance imaging system as claimed in claim 1, its feature is 100Mbps in the message transmission rate of described ethernet interface.
3. the fiber optic Ethernet communication interface for magnetic resonance imaging system as claimed in claim 1, is characterized in that fiber optical transceiver adopts HFBR-5903.
4. the fiber optic Ethernet communication interface for magnetic resonance imaging system as claimed in claim 1, is characterized in that ethernet controller adopts LXT971A.
5. the fiber optic Ethernet communication interface for magnetic resonance imaging system as claimed in claim 1, is characterized in that ethernet controller and fiber optical transceiver all adopt 3.3V Power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320357868.8U CN204031180U (en) | 2013-06-21 | 2013-06-21 | A kind of fiber optic Ethernet communication interface for magnetic resonance imaging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320357868.8U CN204031180U (en) | 2013-06-21 | 2013-06-21 | A kind of fiber optic Ethernet communication interface for magnetic resonance imaging system |
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| CN204031180U true CN204031180U (en) | 2014-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104243037A (en) * | 2013-06-21 | 2014-12-24 | 华润万东医疗装备股份有限公司 | Fiber optical Ethernet communication interface for magnetic resonance imaging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104243037A (en) * | 2013-06-21 | 2014-12-24 | 华润万东医疗装备股份有限公司 | Fiber optical Ethernet communication interface for magnetic resonance imaging system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 100016, No. 3, building 9, Jiuxianqiao East Road, Beijing, Chaoyang District Co-patentee after: Peking University Patentee after: BEIJING WANDONG MEDICAL TECHNOLOGY CO.,LTD. Address before: 100015, No. 3, building 9, Jiuxianqiao East Road, Beijing, Chaoyang District Co-patentee before: Peking University Patentee before: CHINA RESOURCES WANDONG MEDICAL EQUIPMENT CO.,LTD. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141217 |