CN206178789U - USB keeps apart changes optic fibre circuit - Google Patents
USB keeps apart changes optic fibre circuit Download PDFInfo
- Publication number
- CN206178789U CN206178789U CN201620939407.5U CN201620939407U CN206178789U CN 206178789 U CN206178789 U CN 206178789U CN 201620939407 U CN201620939407 U CN 201620939407U CN 206178789 U CN206178789 U CN 206178789U
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- resistance
- power supply
- isolation
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Abstract
The utility model relates to a USB keeps apart changes optic fibre circuit, including auxiliary power supply circuit, USB interface converting circuit, include still that optical coupling isolation changes the optic fibre circuit. Auxiliary power supply circuit changes optic fibre circuit connection with USB interface converting circuit, optical coupling isolation respectively, and the USB interface converting circuit changes optic fibre circuit connection with optical coupling isolation. The beneficial effects are that: accomplished the two -way isolation of serial ports data, isolation voltage is high, and does not influence former communication speed, the accuracy and the reliability of remote data transmission under special conditionss such as high voltage static have been ensured, realize the isolation conversion of USB data with serial ports number of fibers certificate, solved owing to the loss of data problem that electrostatic discharge caused, strengthened its interference killing feature.
Description
Technical field
This utility model is related to a kind of USB isolation being applied in terms of the medium-long range communication of the field such as industry, scientific research, military project and turns
Fiber optic circuit.
Background technology
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
Remotely control aspect, and the transmitting of its remote control data is key issue.In existing application, optical fiber is simply used
It is converted directly into terminal interface to realize remote data transmission.Which is in practical application, it may appear that sporadic data is lost existing
As especially in environment under high pressure application.Multiple 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 for connecting, cause transmission data entanglement and lose data.
The content of the invention
In view of the deficiency that prior art is present, a kind of speed of this utility model offer is fast, remote data transmission reliability is high
USB isolation turn fiber optic circuit, the circuit solves the data loss problem caused due to static discharge, enhances its anti-interference
Ability.
This utility model for achieving the above object, is adopted the technical scheme that a kind of USB isolation turns fiber optic circuit, wraps
Include auxiliary power supply circuit, USB interface change-over circuit, it is characterised in that：Also turn fiber optic circuit including light-coupled isolation, the auxiliary is supplied
Circuit turns fiber optic circuit and is connected with USB interface change-over circuit, light-coupled isolation respectively, the USB interface change-over circuit and optocoupler
Isolation turns fiber optic circuit connection；
Physical circuit is connected as：The light-coupled isolation turns in fiber optic circuit, photoelectrical coupler U2 input light emitting diodes
The foot of anode 2 connects one end of resistance R12 in USB interface change-over circuit, and the foot of negative electrode 3 of photoelectrical coupler U2 input light emitting diodes connects
The foot of data sending terminal 1 of interface conversion chip U1, the Phototube Coupling feeder ear 8 of photoelectrical coupler U2 in USB interface change-over circuit
Foot difference connecting resistance R19 and electric capacity C11 one end, isolation auxiliary power supply anode VG, another termination of electric capacity C11 isolator, light
The foot of Phototube Coupling outfan 6 of electric coupler U2 distinguishes one end, the other end of resistance R19 of connecting resistance R5 and R6, photoelectric coupling
The foot of Phototube Coupling earth terminal 5 of device U2 connects isolator, and the other end of resistance R6 distinguishes one end, the base of audion T1 of connecting resistance R7
Pole, the emitter stage of audion T1 is connected with the other end of resistance R7 and is followed by isolator, and isolation auxiliary power supply anode VG passes through resistance
R4 distinguishes the other end, the colelctor electrode of audion T1, the foot of transmission input 8 of optoelectronic transceiver integrated module M2 of connecting resistance R5, electricity
Sense L1 is connected with one end of L2 and is followed by the positive pole of electric capacity C6 in auxiliary power supply circuit, that is, isolate auxiliary power supply anode VG, inductance L1
The other end connect the foot of transmission feeder ear 6 of one end of electric capacity C7, optoelectronic transceiver integrated module M2, the other end point of inductance L2 respectively
One end, the foot of reception feeder ear 5 of optoelectronic transceiver integrated module M2 of electric capacity C8 are not connect, the transmission of optoelectronic transceiver integrated module M2 connects
The foot of ground terminal 9 is connected with the reception foot of earth terminal 1 and is followed by isolator, and electric capacity C7 is connected with the other end of C8 and is followed by isolator, resistance R9
It is connected with one end of R10 and is followed by the foot of reception outfan 2 of optoelectronic transceiver integrated module M2, the other end of resistance R10 connects respectively electricity
Resistance R11 one end, the base stage of audion T2, the emitter stage of audion T2 be connected with the other end of resistance R11 be followed by isolator, every
The colelctor electrode of audion T2, the other end of resistance R9, photoelectrical coupler U3 are connect respectively by resistance R8 from auxiliary power supply anode VG
The foot of negative electrode 3 of input light emitting diode, the foot of anode 2 of photoelectrical coupler U3 input light emitting diodes connects isolation by resistance R20
The foot of Phototube Coupling outfan 6 of auxiliary power supply anode VG, photoelectrical coupler U3 connects interface conversion chip in USB interface change-over circuit
The foot of data receiver 5 of U1, the foot of Phototube Coupling feeder ear 8 of photoelectrical coupler U3 connects the positive pole of electric capacity C1 in auxiliary power supply circuit
Vdd terminal, the foot of Phototube Coupling earth terminal 5 of photoelectrical coupler U3 meets input ground GND.
The beneficial effects of the utility model are：The two-way isolation of serial data is completed, isolation voltage is high, and does not affect original
Communication speed.Ensure that the accuracy and reliability of the remote data transmission under the specific conditions such as high-pressure electrostatic.Realize USB numbers
Isolate conversion according to serial ports fiber data, solve the data loss problem caused due to static discharge, enhance it anti-dry
Disturb ability.
Description of the drawings
Fig. 1 is the connection block diagram of this utility model power circuit；
Fig. 2 is the schematic diagram of this utility model power circuit.
Specific embodiment
As shown in Figure 1, 2, USB isolation turns fiber optic circuit, including auxiliary power supply circuit, USB interface change-over circuit, also includes
Light-coupled isolation turns fiber optic circuit.
Auxiliary power supply circuit turns fiber optic circuit and is connected with USB interface change-over circuit, light-coupled isolation respectively, USB interface conversion
Circuit turns fiber optic circuit and is connected with light-coupled isolation.
Above-mentioned light-coupled isolation turns in fiber optic circuit, and the foot of anode 2 of photoelectrical coupler U2 input light emitting diodes connects USB interface
One end of resistance R12 in change-over circuit, the foot of negative electrode 3 of photoelectrical coupler U2 input light emitting diodes connects USB interface change-over circuit
The foot of data sending terminal 1 of middle interface conversion chip U1, the foot of the Phototube Coupling feeder ear 8 difference connecting resistance R19 of photoelectrical coupler U2
One end with electric capacity C11, isolation auxiliary power supply anode VG, another termination of electric capacity C11 isolator, the photoelectricity of photoelectrical coupler U2
The foot of isolation and amplifier end 6 distinguishes one end, the other end of resistance R19 of connecting resistance R5 and R6, and the Phototube Coupling of photoelectrical coupler U2 connects
The foot of ground terminal 5 connects isolator, and the other end of resistance R6 distinguishes one end, the base stage of audion T1 of connecting resistance R7, and audion T1's sends out
Emitter-base bandgap grading is connected with the other end of resistance R7 and is followed by isolator, isolating auxiliary power supply anode VG and distinguishing connecting resistance R5's by resistance R4
The other end, the colelctor electrode of audion T1, the foot of transmission input 8 of optoelectronic transceiver integrated module M2, one end phase of inductance L1 and L2
Company is followed by the positive pole of electric capacity C6 in auxiliary power supply circuit, that is, isolate auxiliary power supply anode VG, and the other end of inductance L1 connects respectively electricity
Hold one end, the foot of transmission feeder ear 6 of optoelectronic transceiver integrated module M2 of C7, the other end of inductance L2 connects respectively the one of electric capacity C8
End, the foot of reception feeder ear 5 of optoelectronic transceiver integrated module M2, the foot of transmission earth terminal 9 and the reception of optoelectronic transceiver integrated module M2
The foot of earth terminal 1 is connected and is followed by isolator, and electric capacity C7 is connected with the other end of C8 and is followed by isolator, one end phase of resistance R9 and R10
Company is followed by the foot of reception outfan 2 of optoelectronic transceiver integrated module M2, one end of the other end difference connecting resistance R11 of resistance R10, 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, isolating auxiliary power supply anode
VG meets respectively the colelctor electrode of audion T2, the other end of resistance R9, photoelectrical coupler U3 and is input into light emitting diode by resistance R8
The foot of negative electrode 3, photoelectrical coupler U3 input light emitting diode the foot of anode 2 by resistance R20 connect isolate auxiliary power supply anode VG,
The foot of Phototube Coupling outfan 6 of photoelectrical coupler U3 connects the data receiver 5 of interface conversion chip U1 in USB interface change-over circuit
Foot, the foot of Phototube Coupling feeder ear 8 of photoelectrical coupler U3 connects the positive pole vdd terminal of electric capacity C1 in auxiliary power supply circuit, photoelectric coupling
The foot of Phototube Coupling earth terminal 5 of device U3 meets input ground GND.
The model of interface conversion chip U1：FT232RL.
The model of photoelectrical coupler U2：6N137.
The model of DC/DC power module M1：IB0505LS-1W.
The model of optoelectronic transceiver integrated module M2：NU211132.
High accuracy, the components and parts of low excursion with temperature are selected, the selection of photoelectrical coupler U2 will take into account isolates pressure and transmission
Speed, DC/DC conversion electric powers module M1 select requirement be：High conversion efficiency, small volume, voltage regulation performance are good.
Operation principle
In auxiliary power supply circuit, power supply is directly obtained from 1 foot of USB interface J1, Jing critesistor R1 protection current limlitings, electricity
After holding the input filter of C1 ~ C3, the DC voltage of 5V or so is obtained.On the one hand it power for USB interface change-over circuit, the opposing party
Face provides input voltage VDD to isolate DC/DC power module M1, and by the power transfer module, Jing electric capacity C6 is filtered, again
To isolated DC voltage output VG of high withstand voltage, as the optically isolated supply voltage for turning fiber optic circuit.
In USB interface change-over circuit, model FT232RL of interface conversion chip U1, its have wide temperature, at a high speed, it is steady
Surely the features such as transmitting.When it starts working, complete USB port with computer terminal and dock, and wait 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, Jing after optical coupling isolation circuit, interface conversion chip U1 is converted into USB format data, to adapt to
USB is communicated.
Turn in fiber optic circuit in light-coupled isolation, on the one hand receive USB interface change-over circuit from photoelectrical coupler U2 inputs
The data for sending, by optically isolated, are transferred to the outlet side of U2, after the level shifting circuit via compositions such as audion T1, send
Data is activation is gone out to the foot of transmission input 8 of optoelectronic transceiver integrated module M2, then Jing optical fiber；On the other hand, receive and
From the data message of optical fiber, export from the foot of reception outfan 2 of optoelectronic transceiver integrated module M2, via compositions such as audion T2
After level shifting circuit, data are sent to into the input of photoelectrical coupler U3, by optically isolated, USB interface be sent to again and turned
The foot of data receiver 5 of interface conversion chip U1 in circuit is changed, so as to the two-way isolation for completing serial data is transmitted.
Claims (1)
1. a kind of USB isolation turns fiber optic circuit, including auxiliary power supply circuit, USB interface change-over circuit, it is characterised in that：Also wrap
Include light-coupled isolation and turn fiber optic circuit, the auxiliary power supply circuit turns fiber optic circuit with USB interface change-over circuit, light-coupled isolation respectively
Connection, the USB interface change-over circuit turns fiber optic circuit and is connected with light-coupled isolation；
Physical circuit is connected as：The light-coupled isolation turns in fiber optic circuit, and photoelectrical coupler U2 is input into the anode 2 of light emitting diode
Foot connects one end of resistance R12 in USB interface change-over circuit, and the foot of negative electrode 3 of photoelectrical coupler U2 input light emitting diodes meets USB and connects
The foot of data sending terminal 1 of interface conversion chip U1 in mouth change-over circuit, the foot of Phototube Coupling feeder ear 8 difference of photoelectrical coupler U2
One end of connecting resistance R19 and electric capacity C11, isolation auxiliary power supply anode VG, another termination of electric capacity C11 isolator, photoelectric coupling
The foot of Phototube Coupling outfan 6 of device U2 distinguishes one end, the other end of resistance R19 of connecting resistance R5 and R6, photoelectrical coupler U2's
The foot of Phototube Coupling earth terminal 5 connects isolator, one end, the base stage of audion T1 of the other end difference connecting resistance R7 of resistance R6, 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 distinguished by resistance R4
The other end of connecting resistance R5, the colelctor electrode of audion T1, the foot of transmission input 8 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, that is, isolate auxiliary power supply anode VG, and inductance L1's is another
End connects respectively one end, the foot of transmission feeder ear 6 of optoelectronic transceiver integrated module M2 of electric capacity C7, and the other end of inductance L2 connects respectively electricity
Hold one end, the foot of reception feeder ear 5 of optoelectronic transceiver integrated module M2 of C8, the transmission earth terminal 9 of optoelectronic transceiver integrated module M2
Foot is connected with the reception foot of earth terminal 1 and is followed by isolator, and electric capacity C7 is connected with the other end of C8 and is followed by isolator, resistance R9 and R10
One end be connected and be followed by the foot of reception outfan 2 of optoelectronic transceiver integrated module M2, the other end difference connecting resistance R11 of resistance R10
One end, the base stage of audion T2, the emitter stage of audion T2 be connected with the other end of resistance R11 be followed by isolator, isolate it is auxiliary
Power supply anode VG is helped to connect the colelctor electrode of audion T2, the other end of resistance R9, photoelectrical coupler U3 inputs respectively by resistance R8
The foot of negative electrode 3 of light emitting diode, the foot of anode 2 of photoelectrical coupler U3 input light emitting diodes connects isolation auxiliary by resistance R20
Power supply anode VG, the foot of Phototube Coupling outfan 6 of photoelectrical coupler U3 meets interface conversion chip U1 in USB interface change-over circuit
The foot of data receiver 5, the foot of Phototube Coupling feeder ear 8 of photoelectrical coupler U3 meets the positive pole VDD of electric capacity C1 in auxiliary power supply circuit
End, the foot of Phototube Coupling earth terminal 5 of photoelectrical coupler U3 meets input ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620939407.5U CN206178789U (en) | 2016-08-25 | 2016-08-25 | USB keeps apart changes optic fibre circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620939407.5U CN206178789U (en) | 2016-08-25 | 2016-08-25 | USB keeps apart changes optic fibre circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206178789U true CN206178789U (en) | 2017-05-17 |
Family
ID=60241494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620939407.5U Withdrawn - After Issue CN206178789U (en) | 2016-08-25 | 2016-08-25 | USB keeps apart changes optic fibre circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206178789U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106201954A (en) * | 2016-08-25 | 2016-12-07 | 东文高压电源（天津）股份有限公司 | A kind of USB isolation turns fiber optic circuit |
-
2016
- 2016-08-25 CN CN201620939407.5U patent/CN206178789U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106201954A (en) * | 2016-08-25 | 2016-12-07 | 东文高压电源（天津）股份有限公司 | A kind of USB isolation turns fiber optic circuit |
| CN106201954B (en) * | 2016-08-25 | 2023-07-25 | 东文高压电源（天津）股份有限公司 | USB isolation fiber conversion circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170517 Effective date of abandoning: 20230725 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170517 Effective date of abandoning: 20230725 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |