CN106201954A - A kind of USB isolation turns fiber optic circuit - Google Patents
A kind of USB isolation turns fiber optic circuit Download PDFInfo
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- CN106201954A CN106201954A CN201610721864.1A CN201610721864A CN106201954A CN 106201954 A CN106201954 A CN 106201954A CN 201610721864 A CN201610721864 A CN 201610721864A CN 106201954 A CN106201954 A CN 106201954A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/38—Universal adapter
- G06F2213/3852—Converter between protocols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of USB isolation and turn fiber optic circuit, including auxiliary power supply circuit, USB interface change-over circuit, also include that light-coupled isolation turns fiber optic circuit.Auxiliary power supply circuit turns fiber optic circuit with USB interface change-over circuit, light-coupled isolation respectively and is connected, and USB interface change-over circuit turns fiber optic circuit with light-coupled isolation and is connected.Providing the benefit that: complete the two-way isolation of serial data, isolation voltage is high, and does not affect former communication speed；Ensure that accuracy and the reliability of remote data transmission under the specific conditions such as high-pressure electrostatic；Achieve the isolation conversion of usb data and serial ports fiber data, solve the data loss problem caused due to static discharge, enhance its capacity of resisting disturbance.
Description
Technical field
The present invention relates to a kind of USB being applied in terms of the field medium-long range communications such as industry, scientific research, military project isolation and turn optical fiber
Circuit.
Background technology
Along with industry, the development of military project science and technology, the application of high voltage power supply and high isolation power supply is more and more extensive, particularly it
Remote control method face, and the transmitting of its remote control data is key issue.In existing application, simply use optical fiber
It is converted directly into terminal interface, realizes remote data transmission.Which is when reality is applied, it may appear that sporadic data is lost existing
As, especially in environment under high pressure is applied.Repeatedly practice, it is found that optical fiber cable can have electrostatic, when buildup of static electricity to
After determining voltage, just to the circuit discharging of the USB portion connected, transmission data entanglement is caused to lose data.
Summary of the invention
The deficiency existed in view of prior art, the present invention provides the USB that a kind of speed is fast, remote data transmission reliability is high
Isolation turns fiber optic circuit, and this circuit solves the data loss problem caused due to static discharge, enhances its capacity of resisting disturbance.
The present invention for achieving the above object, is adopted the technical scheme that, a kind of USB isolation turns fiber optic circuit, including auxiliary
Help power supply circuits, USB interface change-over circuit, it is characterised in that: also include that light-coupled isolation turns fiber optic circuit, described auxiliary power supply electricity
Road turns fiber optic circuit with USB interface change-over circuit, light-coupled isolation respectively and is connected, described USB interface change-over circuit and light-coupled isolation
Turn fiber optic circuit to connect；
Physical circuit is connected as: described light-coupled isolation turns in fiber optic circuit, the anode 2 of photoelectrical coupler U2 input light emitting diode
Foot connects one end of resistance R12 in USB interface change-over circuit, and negative electrode 3 foot of photoelectrical coupler U2 input light emitting diode meets USB and connects
Data sending terminal 1 foot of interface conversion chip U1 in mouth change-over circuit, Phototube Coupling feeder ear 8 foot of photoelectrical coupler U2 is respectively
Connecting resistance R19 and one end of electric capacity C11, isolation auxiliary power supply anode VG, electric capacity C11 another termination isolator, photoelectric coupling
Phototube Coupling outfan 6 foot of device U2 one end of connecting resistance R5 and R6, the other end of resistance R19 respectively, photoelectrical coupler U2's
Phototube Coupling earth terminal 5 foot connects isolator, the other end of resistance R6 one end of connecting resistance R7, the base stage of audion T1 respectively, and three
The emitter stage of pole pipe T1 is connected with the other end of resistance R7 and is followed by isolator, and isolation auxiliary power supply anode VG is by resistance R4 respectively
The other end of connecting resistance R5, the colelctor electrode of audion T1, transmission input 8 foot of optoelectronic transceiver integrated module M2, inductance L1 and
One end of L2 is connected and is followed by the positive pole of electric capacity C6 in auxiliary power supply circuit, i.e. isolates auxiliary power supply anode VG, inductance L1 another
End connects transmission feeder ear 6 foot of one end of electric capacity C7, optoelectronic transceiver integrated module M2 respectively, and the other end of inductance L2 connects electricity respectively
Hold one end of C8, reception feeder ear 5 foot of optoelectronic transceiver integrated module M2, the transmission earth terminal 9 of optoelectronic transceiver integrated module M2
Foot is connected with reception earth terminal 1 foot and is followed by isolator, and the other end of electric capacity C7 with C8 is connected and is followed by isolator, resistance R9 and R10
One end be connected and be followed by reception outfan 2 foot of optoelectronic transceiver integrated module M2, the other end of resistance R10 connecting resistance R11 respectively
One end, the base stage of audion T2, the emitter stage of audion T2 is connected with the other end of resistance R11 and is followed by isolator, isolates auxiliary
Power supply anode VG is helped to connect the colelctor electrode of audion T2, the other end of resistance R9, photoelectrical coupler U3 input respectively by resistance R8
Negative electrode 3 foot of light emitting diode, anode 2 foot of photoelectrical coupler U3 input light emitting diode connects isolation auxiliary by resistance R20
Phototube Coupling outfan 6 foot of power supply anode VG, photoelectrical coupler U3 meets interface conversion chip U1 in USB interface change-over circuit
Data receiver 5 foot, Phototube Coupling feeder ear 8 foot of photoelectrical coupler U3 meets the positive pole VDD of electric capacity C1 in auxiliary power supply circuit
End, Phototube Coupling earth terminal 5 foot of photoelectrical coupler U3 meets input ground GND.
The invention has the beneficial effects as follows: complete the two-way isolation of serial data, isolation voltage is high, and does not affect former communication speed
Rate.Ensure that accuracy and the reliability of remote data transmission under the specific conditions such as high-pressure electrostatic.Achieve usb data and string
The isolation conversion of mouth fiber data, solves the data loss problem caused due to static discharge, enhances its capacity of resisting disturbance.
Accompanying drawing explanation
Fig. 1 is the connection block diagram of power circuit of the present invention；
Fig. 2 is the schematic diagram of power circuit of the present invention.
Detailed description of the invention
As shown in Figure 1, 2, a kind of USB isolation turns fiber optic circuit, including auxiliary power supply circuit, USB interface change-over circuit, also
Fiber optic circuit is turned including light-coupled isolation.
Auxiliary power supply circuit turns fiber optic circuit with USB interface change-over circuit, light-coupled isolation respectively and is connected, and USB interface is changed
Circuit turns fiber optic circuit with light-coupled isolation and is connected.
Above-mentioned light-coupled isolation turns in fiber optic circuit, and anode 2 foot of photoelectrical coupler U2 input light emitting diode connects USB interface
One end of resistance R12 in change-over circuit, negative electrode 3 foot of photoelectrical coupler U2 input light emitting diode connects USB interface change-over circuit
Data sending terminal 1 foot of middle interface conversion chip U1, Phototube Coupling feeder ear 8 foot of photoelectrical coupler U2 connecting resistance R19 respectively
With one end of electric capacity C11, isolation auxiliary power supply anode VG, electric capacity C11 another termination isolator, the photoelectricity of photoelectrical coupler U2
Isolation and amplifier end 6 foot one end of connecting resistance R5 and R6, the other end of resistance R19 respectively, the Phototube Coupling of photoelectrical coupler U2 connects
Ground end 5 foot connects isolator, and the other end of resistance R6 one end of connecting resistance R7, the base stage of audion T1 respectively, audion T1 sends out
Emitter-base bandgap grading is connected with the other end of resistance R7 and is followed by isolator, and isolation auxiliary power supply anode VG is by resistance R4 connecting resistance R5's respectively
The other end, the colelctor electrode of audion T1, transmission input 8 foot of optoelectronic transceiver integrated module M2, one end phase of inductance L1 and L2
Even being followed by the positive pole of electric capacity C6 in auxiliary power supply circuit, i.e. isolation auxiliary power supply anode VG, the other end of inductance L1 connects electricity respectively
Holding one end of C7, transmission feeder ear 6 foot of optoelectronic transceiver integrated module M2, the other end of inductance L2 meets the one of electric capacity C8 respectively
End, reception feeder ear 5 foot of optoelectronic transceiver integrated module M2, transmission earth terminal 9 foot of optoelectronic transceiver integrated module M2 and reception
Earth terminal 1 foot is connected and is followed by isolator, and the other end of electric capacity C7 with C8 is connected and is followed by isolator, one end phase of resistance R9 and R10
Even it is followed by reception outfan 2 foot of optoelectronic transceiver integrated module M2, the other end of resistance R10 one end of connecting resistance R11 respectively, three
The base stage of pole pipe T2, the emitter stage of audion T2 is connected with the other end of resistance R11 and is followed by isolator, isolates auxiliary power supply anode
VG connects the colelctor electrode of audion T2 respectively by resistance R8, the other end of resistance R9, photoelectrical coupler U3 input light emitting diode
Negative electrode 3 foot, photoelectrical coupler U3 input light emitting diode anode 2 foot by resistance R20 connect isolate auxiliary power supply anode VG,
Phototube Coupling outfan 6 foot of photoelectrical coupler U3 connects the data receiver 5 of interface conversion chip U1 in USB interface change-over circuit
Foot, Phototube Coupling feeder ear 8 foot of photoelectrical coupler U3 connects the positive pole vdd terminal of electric capacity C1 in auxiliary power supply circuit, photoelectric coupling
Phototube Coupling earth terminal 5 foot of device U3 meets input ground GND.
The model of interface conversion chip U1 is: FT232RL.
The model of photoelectrical coupler U2 is: 6N137.
The model of DC/DC power module M1 is: IB0505LS-1W.
The model of optoelectronic transceiver integrated module M2 is: NU211132.
Selecting high accuracy, the components and parts of low excursion with temperature, the selection of photoelectrical coupler U2 to take into account isolates pressure and transmission
Speed, the selection requirement of DC/DC conversion electric power module M1 is: conversion efficiency is high, volume is little, voltage regulation performance good.
Operation principle
In auxiliary power supply circuit, power supply directly obtains from 1 foot of USB interface J1, protects current limliting, electric capacity C1 through critesistor R1
After the input filter of ~ C3, obtain the DC voltage of about 5V.On the one hand it power for USB interface change-over circuit, is on the other hand
Isolation DC/DC power module M1 provides input voltage VDD, and by this power transfer module, filters through electric capacity C6, height of getting back
Pressure isolated DC voltage output VG, as the optically isolated supply voltage turning fiber optic circuit.
In USB interface change-over circuit, the model of interface conversion chip U1 is FT232RL, and it has wide warm, at a high speed, surely
Determine the features such as transmission.When it is started working, complete USB port with computer terminal and dock, and etc. the transmission of pending data.When have data from
Computer terminal sends out, and interface conversion chip U1 is converted into serial ports formatted data, to adapt to serial communication；When have data from
When isolation optical fiber end sends, after optical coupling isolation circuit, interface conversion chip U1 is converted into USB format data, to adapt to
USB communication.
In light-coupled isolation turns fiber optic circuit, on the one hand receive USB interface change-over circuit from photoelectrical coupler U2 input
The data sent, by optically isolated, are transferred to the outlet side of U2, via after the level shifting circuit that audion T1 etc. forms, send
To transmission input 8 foot of optoelectronic transceiver integrated module M2, then through optical fiber, data are sent；On the other hand, arrival is received
From the data message of optical fiber, export from reception outfan 2 foot of optoelectronic transceiver integrated module M2, form via audion T2 etc.
After level shifting circuit, data are delivered to the input of photoelectrical coupler U3, by optically isolated, be sent to again USB interface and turn
Change data receiver 5 foot of interface conversion chip U1 in circuit, thus complete the two-way isolation transmission of serial data.
Claims (1)
1. USB isolation turns a fiber optic circuit, including auxiliary power supply circuit, USB interface change-over circuit, it is characterised in that: also wrap
Including light-coupled isolation and turn fiber optic circuit, described auxiliary power supply circuit turns fiber optic circuit with USB interface change-over circuit, light-coupled isolation respectively
Connecting, described USB interface change-over circuit turns fiber optic circuit with light-coupled isolation and is connected；
Physical circuit is connected as: described light-coupled isolation turns in fiber optic circuit, the anode 2 of photoelectrical coupler U2 input light emitting diode
Foot connects one end of resistance R12 in USB interface change-over circuit, and negative electrode 3 foot of photoelectrical coupler U2 input light emitting diode meets USB and connects
Data sending terminal 1 foot of interface conversion chip U1 in mouth change-over circuit, Phototube Coupling feeder ear 8 foot of photoelectrical coupler U2 is respectively
Connecting resistance R19 and one end of electric capacity C11, isolation auxiliary power supply anode VG, electric capacity C11 another termination isolator, photoelectric coupling
Phototube Coupling outfan 6 foot of device U2 one end of connecting resistance R5 and R6, the other end of resistance R19 respectively, photoelectrical coupler U2's
Phototube Coupling earth terminal 5 foot connects isolator, the other end of resistance R6 one end of connecting resistance R7, the base stage of audion T1 respectively, and three
The emitter stage of pole pipe T1 is connected with the other end of resistance R7 and is followed by isolator, and isolation auxiliary power supply anode VG is by resistance R4 respectively
The other end of connecting resistance R5, the colelctor electrode of audion T1, transmission input 8 foot of optoelectronic transceiver integrated module M2, inductance L1 and
One end of L2 is connected and is followed by the positive pole of electric capacity C6 in auxiliary power supply circuit, i.e. isolates auxiliary power supply anode VG, inductance L1 another
End connects transmission feeder ear 6 foot of one end of electric capacity C7, optoelectronic transceiver integrated module M2 respectively, and the other end of inductance L2 connects electricity respectively
Hold one end of C8, reception feeder ear 5 foot of optoelectronic transceiver integrated module M2, the transmission earth terminal 9 of optoelectronic transceiver integrated module M2
Foot is connected with reception earth terminal 1 foot and is followed by isolator, and the other end of electric capacity C7 with C8 is connected and is followed by isolator, resistance R9 and R10
One end be connected and be followed by reception outfan 2 foot of optoelectronic transceiver integrated module M2, the other end of resistance R10 connecting resistance R11 respectively
One end, the base stage of audion T2, the emitter stage of audion T2 is connected with the other end of resistance R11 and is followed by isolator, isolates auxiliary
Power supply anode VG is helped to connect the colelctor electrode of audion T2, the other end of resistance R9, photoelectrical coupler U3 input respectively by resistance R8
Negative electrode 3 foot of light emitting diode, anode 2 foot of photoelectrical coupler U3 input light emitting diode connects isolation auxiliary by resistance R20
Phototube Coupling outfan 6 foot of power supply anode VG, photoelectrical coupler U3 meets interface conversion chip U1 in USB interface change-over circuit
Data receiver 5 foot, Phototube Coupling feeder ear 8 foot of photoelectrical coupler U3 meets the positive pole VDD of electric capacity C1 in auxiliary power supply circuit
End, Phototube Coupling earth terminal 5 foot of photoelectrical coupler U3 meets input ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721864.1A CN106201954B (en) | 2016-08-25 | 2016-08-25 | USB isolation fiber conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721864.1A CN106201954B (en) | 2016-08-25 | 2016-08-25 | USB isolation fiber conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106201954A true CN106201954A (en) | 2016-12-07 |
| CN106201954B CN106201954B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610721864.1A Active CN106201954B (en) | 2016-08-25 | 2016-08-25 | USB isolation fiber conversion circuit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771355A (en) * | 2010-02-05 | 2010-07-07 | 天津市东文高压电源厂 | Fixed-output isolation high-voltage power supply module |
| CN103633876A (en) * | 2013-12-19 | 2014-03-12 | 东文高压电源（天津）有限公司 | Isolation-control bipolar high-frequency high-voltage pulse power supply circuit |
| US8766221B1 (en) * | 2010-04-30 | 2014-07-01 | Power-One, Inc. | Isolation system for a bi-directional communication bus line |
| CN105337483A (en) * | 2014-08-07 | 2016-02-17 | 中兴通讯股份有限公司 | Device for preventing current from flowing backwards |
| CN105790554A (en) * | 2016-04-06 | 2016-07-20 | 杭州电子科技大学 | IGBT circuit having dual-isolation characteristic and control method thereof |
| CN206178789U (en) * | 2016-08-25 | 2017-05-17 | 东文高压电源（天津）股份有限公司 | USB keeps apart changes optic fibre circuit |
-
2016
- 2016-08-25 CN CN201610721864.1A patent/CN106201954B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771355A (en) * | 2010-02-05 | 2010-07-07 | 天津市东文高压电源厂 | Fixed-output isolation high-voltage power supply module |
| US8766221B1 (en) * | 2010-04-30 | 2014-07-01 | Power-One, Inc. | Isolation system for a bi-directional communication bus line |
| CN103633876A (en) * | 2013-12-19 | 2014-03-12 | 东文高压电源（天津）有限公司 | Isolation-control bipolar high-frequency high-voltage pulse power supply circuit |
| CN105337483A (en) * | 2014-08-07 | 2016-02-17 | 中兴通讯股份有限公司 | Device for preventing current from flowing backwards |
| CN105790554A (en) * | 2016-04-06 | 2016-07-20 | 杭州电子科技大学 | IGBT circuit having dual-isolation characteristic and control method thereof |
| CN206178789U (en) * | 2016-08-25 | 2017-05-17 | 东文高压电源（天津）股份有限公司 | USB keeps apart changes optic fibre circuit |
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| Publication number | Publication date |
|---|---|
| CN106201954B (en) | 2023-07-25 |
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