CN110750474A - Data line for remote transmission of USB2.0 signals - Google Patents
Data line for remote transmission of USB2.0 signals Download PDFInfo
- Publication number
- CN110750474A CN110750474A CN201911148322.XA CN201911148322A CN110750474A CN 110750474 A CN110750474 A CN 110750474A CN 201911148322 A CN201911148322 A CN 201911148322A CN 110750474 A CN110750474 A CN 110750474A
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- optical
- conversion circuit
- usb interface
- signals
- signal
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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
- G06F13/387—Information transfer, e.g. on bus using universal interface adapter for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system
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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
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Information Transfer Systems (AREA)
Abstract
The invention discloses a data line for remote transmission of USB2.0 signals, which relates to the technical field of data transmission and comprises a USB interface, a conversion unit and an optical cable; the conversion unit is used for conversion between optical signals and electrical signals. The USB interface is electrically connected with the conversion unit, and the conversion unit is electrically connected with the optical cable; the number of the USB interfaces is two, the number of the conversion units is two, the two conversion units are respectively connected to two ends of the optical cable, and the USB interfaces are respectively connected to the two conversion units. The conversion unit converts the electrical signal into an optical signal after the equipment sending signal is transmitted through the usb interface, and the conversion unit at the other end converts the optical signal into the electrical signal after the optical cable transmission, so that the electrical signal is transmitted to other equipment. The invention solves the problem that the existing data line can not stably transmit data in a long distance.
Description
Technical Field
The invention relates to the technical field of data transmission, in particular to a data line for remote transmission of USB2.0 signals.
Background
Universal Serial Bus (USB) is a Serial Bus standard for connecting computer systems and external devices, and is also a technical specification of input/output interfaces, and is widely used in information communication products such as personal computers and mobile devices, and is extended to other related fields such as video equipment, digital televisions (set-top boxes), game machines, and the like. The USB device supports hot plug, is convenient to carry, has uniform standard and can be connected with a plurality of devices simultaneously. According to the development process of the USB device interface signals, the USB device can be divided into USB1.0, USB2.0, and USB3.0, and the development process is currently developed to USB 3.1. The military command system with the USB2.0 interface is most widely applied, and most of equipment is connected through the USB2.0 interface.
However, under the current technical conditions, USB2.0 also has a great disadvantage, namely, short transmission distance. Because the overlength wire can receive too big interference, USB 2.0's power supply is 5V voltage lower in addition, and wire length increases, and the resistance of wire also increases naturally, and the voltage to USB equipment will reduce, so wired USB signal can't the long-distance transmission. Under normal conditions, a general USB2.0 cable can only effectively transmit signals for about 5 meters, and the signals are attenuated when the length of the cable exceeds 5 meters. In order to prolong the USB2.0 transmission distance, the main method is implemented by USB HUBs, and each time a HUB is added, the length can be extended by 5 meters, and a total of 5 HUBs can be added, that is, the length is extended 5 times, and each time is 5 meters, so the length can be extended by 25 meters. The method has the advantages of more parts needing to be switched in the transmission process, high cost, instability and incapability of realizing longer transmission distance.
Disclosure of Invention
Aiming at the requirements and the defects of the prior art development, the invention provides a data line for remote transmission of USB2.0 signals.
The invention discloses a data line for remote transmission of USB2.0 signals, which adopts the following technical scheme for solving the technical problems:
a data line for long-distance transmission of USB2.0 signals comprises a USB interface, a conversion unit and an optical cable;
the conversion unit is used for conversion between optical signals and electrical signals.
The USB interface is electrically connected with the conversion unit, and the conversion unit is electrically connected with the optical cable;
furthermore, the number of the USB interfaces is two, the number of the conversion units is two, the two conversion units are respectively connected to two ends of the optical cable, and the USB interfaces are respectively connected to the two conversion units.
Further, the optical cable is a double-core optical fiber cable. The double-core optical fiber is used for signal bidirectional transmission
Further, the conversion device comprises a sending module and a receiving module;
the transmitting module is used for converting the electrical signals into optical signals, the receiving module is used for converting the optical signals into the electrical signals, the transmitting module is connected with a signal line of the USB interface, and the receiving module is connected with the signal line of the USB interface.
Furthermore, the receiving module at one end of the optical cable and the sending module at the other end of the optical cable are connected with the same optical fiber.
Further, the sending module comprises a sending protocol conversion circuit, an encoder, a serializer and an electric-optical conversion circuit;
the input end of the sending protocol conversion circuit is connected with a signal wire of the USB interface, the output end of the sending protocol conversion circuit is connected with the input end of the encoder, the output end of the encoder is connected with the input end of the serializer, the output end of the serializer is connected with the input end of the electric-optical conversion circuit, and the output end of the electric-optical conversion circuit is connected with the optical cable.
Further, the receiving module comprises a protocol conversion circuit, a decoder, a deserializer and an optical-to-electrical conversion circuit;
the input end of the optical-electrical conversion unit is connected with the optical cable, the output end of the optical-electrical conversion circuit is connected with the input end of the deserializer, the output end of the deserializer is connected with the input end of the decoder, the output end of the decoder is connected with the input end of the protocol conversion circuit, and the output end of the protocol conversion circuit is connected with the signal wire of the USB interface.
Compared with the prior art, the data line for the remote transmission of the USB2.0 signal has the following beneficial effects:
the data line for the remote transmission of the USB2.0 signal realizes the conversion of an optical signal and an electric signal through the conversion unit, and can stably transmit the signal in a remote distance through the optical fiber.
Drawings
FIG. 1 is a schematic diagram of a transmission process of a data line for remote transmission of USB2.0 signals according to the present invention;
Detailed Description
In order to make the technical scheme, the technical problems to be solved and the technical effects of the present invention more clearly apparent, the following technical scheme of the present invention is clearly and completely described with reference to the specific embodiments.
With reference to the accompanying drawings, the present embodiment provides a data line for USB2.0 signal long-distance transmission, including a USB interface, a conversion device, and an optical cable;
the conversion unit is used for conversion between optical signals and electrical signals.
The USB interface is electrically connected with the conversion unit, and the conversion unit is electrically connected with the optical cable;
the USB interface has two, and the converting unit has two, and two converting units are connected respectively in the optical cable both ends, and the USB interface is connected respectively in two converting units.
The optical cable is a GJYXCH-2B1 optical cable, and two optical fibers are arranged in the optical cable.
The conversion device comprises a sending module and a receiving module;
the optical cable comprises a transmitting module, a receiving module, a USB interface, a receiving module, an optical cable end receiving module and an optical cable other end transmitting module, wherein the transmitting module is used for converting an electric signal into an optical signal, the receiving module is used for converting the optical signal into the electric signal, the transmitting module is connected with a signal wire of the USB interface, the receiving module is connected with the signal wire of the USB interface, and the optical cable end receiving module and.
The sending module comprises a sending protocol conversion circuit, an encoder, a serializer and an electric-optical conversion circuit;
the input end of the sending protocol conversion circuit is connected with a signal wire of the USB interface, the output end of the sending protocol conversion circuit is connected with the input end of the encoder, the output end of the encoder is connected with the input end of the serializer, the output end of the serializer is connected with the input end of the electric-optical conversion circuit, and the output end of the electric-optical conversion circuit is connected with the optical cable. The protocol conversion circuit is a USB-to-TLL circuit.
The receiving module comprises a protocol conversion circuit, a decoder, a deserializer and an optical-electrical conversion circuit;
the input end of the optical-electrical conversion unit is connected with the optical cable, the output end of the optical-electrical conversion circuit is connected with the input end of the deserializer, the output end of the deserializer is connected with the input end of the decoder, the output end of the decoder is connected with the input end of the protocol conversion circuit, and the output end of the protocol conversion circuit is connected with the signal wire of the USB interface.
The working principle of the data line for the remote transmission of the USB2.0 signal is as follows:
the USB signal line receives a signal of sending equipment, the signal is converted by the sending protocol conversion circuit, then the signal is coded by the coder, the coded signal is converted into a serial signal by the serializer, the serial signal is converted into an optical signal by the electric-optical conversion circuit, the optical signal reaches a receiving end after being transmitted by the optical fiber, the received optical signal is converted into the serial signal by the optical-electric conversion signal of the receiving end, the serial signal is converted into the coded signal by the decoder, the coded signal is converted into the signal by the decoder, and the signal is transmitted to the receiving equipment after being converted by the receiving and sending protocol conversion circuit.
The data line for the remote transmission of the USB2.0 signal realizes the conversion of light and signals through the conversion unit, and can stably transmit the signal in a remote distance through the optical fiber.
The principles and embodiments of the present invention have been described in detail using specific examples, which are provided only to aid in understanding the core technical content of the present invention. Based on the above embodiments of the present invention, those skilled in the art should make any improvements and modifications to the present invention without departing from the principle of the present invention, and therefore, the present invention should fall into the protection scope of the present invention.
Claims (6)
1. The utility model provides a data line of USB2.0 signal long distance transmission which characterized in that: the USB interface, the conversion unit and the optical cable are included;
the conversion unit is used for converting between optical signals and electric signals;
the USB interface is electrically connected with the conversion unit, and the conversion unit is connected with the optical cable.
The USB interface has two, the converting unit has two, two the converting unit connect respectively in the optical cable both ends, the USB interface connect respectively in two the converting unit.
The USB interface has two, the converting unit has two, two the converting unit connect respectively in the optical cable both ends, the USB interface connect respectively in two the converting unit.
2. The data line for long-distance transmission of USB2.0 signals according to claim 1, wherein: the optical cable is a double-core optical fiber cable, the double-core optical fiber is used for signal bidirectional transmission, and the conversion unit is connected with the double-core optical fiber.
3. The data line for long-distance transmission of USB2.0 signals according to claim 2, wherein:
the conversion unit comprises a sending module and a receiving module;
the transmitting module is used for converting electrical signals into optical signals, the receiving module is used for converting the optical signals into the electrical signals, the transmitting module is connected with the signal line of the USB interface, and the receiving module is connected with the signal line of the USB interface.
4. A USB2.0 signal long distance transmission data line according to claim 3, wherein: and the receiving module at one end of the optical cable and the sending module at the other end of the optical cable are connected to the same optical fiber.
5. The data line for remote transmission of USB2.0 signals according to claim 4, wherein said transmitting module comprises a transmitting protocol conversion circuit, an encoder, a serializer and an electro-optical conversion circuit;
the input end of the sending protocol conversion circuit is connected to a signal line of the USB interface, the output end of the sending protocol conversion circuit is connected to the input end of the encoder, the output end of the encoder is connected to the input end of the serializer, the output end of the serializer is connected to the input end of the electric-optical conversion circuit, and the output end of the electric-optical conversion circuit is connected to the optical cable.
6. The data line for long-distance transmission of USB2.0 signals according to claim 5, wherein: the receiving module comprises a protocol conversion circuit, a decoder, a deserializer and an optical-electrical conversion circuit;
the input end of the optical-to-electrical conversion circuit is connected to the optical cable, the output end of the optical-to-electrical conversion circuit is connected to the input end of the deserializer, the output end of the deserializer is connected to the input end of the decoder, the output end of the decoder is connected to the input end of the protocol conversion circuit, and the output end of the protocol conversion circuit is connected to the signal wire of the USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911148322.XA CN110750474A (en) | 2019-11-21 | 2019-11-21 | Data line for remote transmission of USB2.0 signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911148322.XA CN110750474A (en) | 2019-11-21 | 2019-11-21 | Data line for remote transmission of USB2.0 signals |
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| Publication Number | Publication Date |
|---|---|
| CN110750474A true CN110750474A (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911148322.XA Pending CN110750474A (en) | 2019-11-21 | 2019-11-21 | Data line for remote transmission of USB2.0 signals |
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| CN (1) | CN110750474A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111858425A (en) * | 2020-06-02 | 2020-10-30 | 深圳市周立功单片机有限公司 | USB-optical fiber conversion device and USB communication equipment |
| WO2022199425A1 (en) * | 2021-03-23 | 2022-09-29 | Wingcomm Co., Ltd. | Usb and thunderbolt optical signal transceiver |
-
2019
- 2019-11-21 CN CN201911148322.XA patent/CN110750474A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111858425A (en) * | 2020-06-02 | 2020-10-30 | 深圳市周立功单片机有限公司 | USB-optical fiber conversion device and USB communication equipment |
| CN111858425B (en) * | 2020-06-02 | 2023-08-25 | 深圳市周立功单片机有限公司 | USB-optical fiber conversion device and USB communication equipment |
| WO2022199425A1 (en) * | 2021-03-23 | 2022-09-29 | Wingcomm Co., Ltd. | Usb and thunderbolt optical signal transceiver |
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