CN110798260A - Visible light one-way transmission system based on physical disconnection - Google Patents
Visible light one-way transmission system based on physical disconnection Download PDFInfo
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- CN110798260A CN110798260A CN201911121156.4A CN201911121156A CN110798260A CN 110798260 A CN110798260 A CN 110798260A CN 201911121156 A CN201911121156 A CN 201911121156A CN 110798260 A CN110798260 A CN 110798260A
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- module
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
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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
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
Abstract
The invention discloses a visible light one-way transmission system based on physical disconnection, and relates to the technical field of computer communication. The invention comprises an outer net processing unit; the outer net processing unit is connected with an isolation unit; the isolation unit is connected with an intranet processing unit; the outer net processing unit is connected with a first network; the isolation unit comprises a signal sending module, a space transmission module and a signal receiving module; the signal sending module sends a signal to the signal receiving module through the space transmission module to be received; the signal sending module comprises a laser transmitter and a laser transmitting circuit; the intranet processing unit is connected with a second network. The invention connects the isolation unit through the outer network processing unit, and the isolation unit connects the inner network processing unit, thereby achieving the effects of improving the information exchange efficiency, ensuring the compatibility of the unidirectional laser receiving end and the unidirectional laser receiving end with the traditional optical module, further improving the security of unidirectional communication, and being beneficial to high-speed unidirectional communication.
Description
Technical Field
The invention belongs to the technical field of computer communication, and particularly relates to a visible light unidirectional transmission system based on physical disconnection.
Background
With the rapid development of electronic information technology and computer network technology, the electronic informatization level of China is rapidly improved, each department and organization establish an own informatization system, and the interaction among the information systems is more and more intimate. However, with the increasing network attacks and Lesog software events in recent years, the security of the information system is greatly threatened. In order to prevent information leakage, people often exchange information in a physical isolation mode, an offline copy mode and the like, but the efficiency of information exchange is reduced.
Aiming at the problems, the invention connects the isolation unit through the outer network processing unit, and the isolation unit is connected with the inner network processing unit, thereby achieving the effects of improving the information exchange efficiency, ensuring the compatibility of the unidirectional laser receiving end and the unidirectional laser receiving end with the traditional optical module, further improving the security of unidirectional communication, and being beneficial to high-speed unidirectional communication.
Disclosure of Invention
The invention aims to provide a visible light one-way transmission system based on physical disconnection, which solves the problems of low safety and low information exchange efficiency of the existing transmission system by connecting an outer network processing unit with an isolation unit and connecting the isolation unit with an inner network processing unit.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a visible light one-way transmission system based on physical disconnection, which comprises an external network processing unit; the outer net processing unit is connected with an isolation unit; the isolation unit is connected with an intranet processing unit;
the external network processing unit is connected with a first network and receives or transmits user data through a network interface;
the isolation unit comprises a signal sending module, a space transmission module and a signal receiving module; the signal sending module sends a signal to the signal receiving module through the space transmission module to be received; the signal sending module directly sends laser into the air, the laser is transmitted along a straight line in the space transmission module, the signal receiving module detects a laser signal from a free space, and data is recovered after restoration processing;
the signal sending module comprises a laser transmitter and a laser transmitting circuit; the laser transmitter and the laser transmitting circuit form a unidirectional laser transmitting end, and an electrical interface of the unidirectional laser transmitting end reserves a pin for receiving a signal; the signal transmitting module is connected with a first power supply module and used for supplying power to the signal receiving module;
the space transmission module is an air medium space;
the signal receiving module comprises an optical receiver and a laser receiving circuit; the optical receiver and the laser receiving circuit form a one-way laser receiving end; the electrical interface of the signal receiving module reserves a pin for transmitting a signal, so that the signal transmitting module and the signal receiving module have the same interface and are compatible with the same packaged optical fiber modules, and a single transmitting card or a single receiving card is formed by inserting a single-direction laser transmitting end or a single-direction laser receiving end on a traditional optical fiber card, so that high-safety physically-isolated one-way communication is formed; the signal receiving module is connected with a second power supply module and used for supplying power to the signal receiving module;
the intranet processing unit is connected with a second network.
Furthermore, the transmitting end of the laser transmitter is provided with a light path adjusting module; the optical path adjusting module comprises a first lens and a second lens; the laser transmitter sends light to the free space through the first lens, and the signal receiving module receives the light and gathers the light beam to the PD photosensitive area of the signal receiving module through the second lens, so that the light receiving and detecting functions are completed.
Further, the laser emission circuit comprises a laser driving circuit, a signal modulation circuit and a signal monitoring circuit.
Further, the laser receiving circuit comprises an amplifying circuit, a demodulating circuit and a monitoring circuit.
Further, the signal sending module is connected with a signal output interface of the error code testing module through a coaxial cable; the signal receiving port of the error code testing module is connected with the signal receiving module through a coaxial cable; and the error code testing module compares the signal of the signal sending module with the signal of the signal receiving module to test the error code rate of communication.
The invention has the following beneficial effects:
1. the invention forms a unidirectional laser receiving end through the optical receiver and the laser receiving circuit; the electrical interface of the signal receiving module reserves a pin for transmitting signals, so that the interfaces of the signal transmitting module and the signal receiving module are the same, the signal transmitting module is compatible with the packaged optical fiber modules of the same type, and the one-way communication with high safety and physical isolation is formed.
2. The invention compares the signal of the signal sending module with the signal of the signal receiving module through the error code testing module, tests the error code rate of communication, and has the effects of improving the information exchange efficiency, ensuring the compatibility of the one-way laser receiving end and the one-way laser receiving end with the traditional optical module, further improving the safety of one-way communication and being beneficial to high-speed one-way communication.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a visible light unidirectional transmission system based on physical disconnection according to the present invention;
fig. 2 is a system framework diagram of an isolation unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention is a physical disconnection-based visible light unidirectional transmission system, including an external network processing unit; the outer net processing unit is connected with an isolation unit; the isolation unit is connected with an intranet processing unit;
the external network processing unit is connected with a first network and receives or transmits user data through a network interface;
the isolation unit comprises a signal sending module, a space transmission module and a signal receiving module; the signal sending module sends a signal to the signal receiving module through the space transmission module to be received; the signal sending module directly sends laser into the air, the laser is transmitted along a straight line in the space transmission module, the signal receiving module detects a laser signal from a free space, and data is recovered after restoration processing;
the signal sending module comprises a laser transmitter and a laser transmitting circuit; the laser transmitter and the laser transmitting circuit form a one-way laser transmitting end, and an electrical interface of the one-way laser transmitting end reserves a pin for receiving a signal; the signal sending module is connected with a first power supply module and used for supplying power to the signal receiving module;
the space transmission module is an air medium space;
the signal receiving module comprises an optical receiver and a laser receiving circuit; the optical receiver and the laser receiving circuit form a one-way laser receiving end; the electrical interface of the signal receiving module reserves a pin for transmitting a signal, so that the signal transmitting module and the signal receiving module have the same interface and are compatible with the same packaged optical fiber modules, and a single transmitting card or a single receiving card is formed by inserting a single-direction laser transmitting end or a single-direction laser receiving end on a traditional optical fiber card, so that high-safety physically-isolated one-way communication is formed; the signal receiving module is connected with a second power supply module and used for supplying power to the signal receiving module;
the intranet processing unit is connected with a second network.
Preferably, as shown in fig. 2, the emitting end of the laser emitter is provided with a light path adjusting module; the optical path adjusting module comprises a first lens and a second lens; the light that laser emitter sent sends free space through first lens, and signal receiving module receives the light and gathers the PD photosensitive area of signal receiving module with the light beam through second lens, accomplishes the receiving and detecting function of light.
Preferably, as shown in fig. 2, the laser emission circuit includes a laser driving circuit, a signal modulation circuit, and a signal monitoring circuit.
Preferably, as shown in fig. 2, the laser receiving circuit includes an amplifying circuit, a demodulating circuit, and a monitoring circuit.
Preferably, as shown in fig. 2, the signal sending module is connected to the signal output interface of the error code testing module through a coaxial cable; a signal receiving port of the error code testing module is connected with the signal receiving module through a coaxial cable; and the error code testing module compares the signal of the signal sending module with the signal of the signal receiving module to test the error code rate of communication.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. Visible light unidirectional transmission system based on physics disconnection, its characterized in that: comprises an outer net processing unit; the outer net processing unit is connected with an isolation unit; the isolation unit is connected with an intranet processing unit;
the external network processing unit is connected with a first network and receives or transmits user data through a network interface;
the isolation unit comprises a signal sending module, a space transmission module and a signal receiving module; the signal sending module sends a signal to the signal receiving module through the space transmission module to be received;
the signal sending module comprises a laser transmitter and a laser transmitting circuit; the signal transmitting module is connected with a first power supply module and used for supplying power to the signal receiving module;
the space transmission module is an air medium space;
the signal receiving module comprises an optical receiver and a laser receiving circuit; the signal receiving module is connected with a second power supply module and used for supplying power to the signal receiving module;
the intranet processing unit is connected with a second network.
2. The one-way visible light transmission system based on physical disconnection as claimed in claim 1, wherein the laser transmitter transmitting end is provided with a light path adjusting module; the optical path adjusting module comprises a first lens and a second lens.
3. The physical disconnection-based visible light unidirectional transmission system of claim 1, wherein the laser emission circuit comprises a laser driving circuit, a signal modulation circuit and a signal monitoring circuit.
4. The system according to claim 1, wherein the laser receiving circuit comprises an amplifying circuit, a demodulating circuit and a monitoring circuit.
5. The system according to claim 1, wherein the signal transmission module is connected to the signal output interface of the error code testing module via a coaxial cable; and a signal receiving port of the error code testing module is connected with the signal receiving module through a coaxial cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911121156.4A CN110798260A (en) | 2019-11-15 | 2019-11-15 | Visible light one-way transmission system based on physical disconnection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911121156.4A CN110798260A (en) | 2019-11-15 | 2019-11-15 | Visible light one-way transmission system based on physical disconnection |
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| CN110798260A true CN110798260A (en) | 2020-02-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014583A (en) * | 2021-02-26 | 2021-06-22 | 中国电子科技集团公司第五十四研究所 | Laser optical shutter |
| CN113285754A (en) * | 2021-04-14 | 2021-08-20 | 西安理工大学 | Unidirectional information safety transmission system based on light and transmission method thereof |
| CN114666084A (en) * | 2021-11-04 | 2022-06-24 | 北京盟力星科技有限公司 | Device and method for isolating and transmitting information based on internal network |
| CN115664518A (en) * | 2022-12-28 | 2023-01-31 | 中国科学院长春光学精密机械与物理研究所 | Unidirectional lead-in equipment and unidirectional lead-in system based on space laser transmission |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014583A (en) * | 2021-02-26 | 2021-06-22 | 中国电子科技集团公司第五十四研究所 | Laser optical shutter |
| CN113285754A (en) * | 2021-04-14 | 2021-08-20 | 西安理工大学 | Unidirectional information safety transmission system based on light and transmission method thereof |
| CN114666084A (en) * | 2021-11-04 | 2022-06-24 | 北京盟力星科技有限公司 | Device and method for isolating and transmitting information based on internal network |
| CN115664518A (en) * | 2022-12-28 | 2023-01-31 | 中国科学院长春光学精密机械与物理研究所 | Unidirectional lead-in equipment and unidirectional lead-in system based on space laser transmission |
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