CN218549939U

CN218549939U - Safe one-way printing sharing switching equipment based on high-speed optical isolation

Info

Publication number: CN218549939U
Application number: CN202220592451.9U
Authority: CN
Inventors: 杨才山; 贾玉凤; 孟祥文; 胡双喜; 郑晨; 张文涛; 徐洋
Original assignee: Tianjin Optoelectronics Anchen Information Technology Co ltd
Current assignee: Tianjin Optoelectronics Anchen Information Technology Co ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2023-02-28
Anticipated expiration: 2032-03-17

Abstract

The utility model discloses a safe one-way shared switching equipment that prints based on high-speed optical isolation, equipment includes: the first processor receives and processes the printing information of the intranet computer, and the printing information is transmitted to the third processor through the light emitter; the second processor receives and processes the printing information of the external network computer, and transmits the printing information to the third processor through the light emitter; the third processor analyzes the received printing information through the optical receiver and sends the printing information to the printer. The utility model overcomes current shared printing apparatus's is not enough, and through the one-way transmission system of high-speed light isolation, the potential safety hazard of elimination information leakage guarantees the safety of data.

Description

Safe one-way printing sharing switching equipment based on high-speed optical isolation

Technical Field

The utility model relates to a printer field especially relates to a safe one-way shared switching equipment that prints based on high-speed optical isolation.

Background

At present, in office environment, the scene that a printer was used to many people is more and more, and ordinary printer sharing switch, physical connection is communicating between each host computer and the printer, and the data of intranet has the risk of revealing.

When an intranet and extranet host shares and uses one printer, data is cached in a read-write area of the printer, if an extranet is implanted with malicious codes, and after the extranet is switched to the extranet, the data in the area can be read by the extranet host, so that data leakage is caused.

To above-mentioned problem, this patent has designed a safe one-way printing sharing switching equipment based on high-speed optoisolation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a safe one-way shared switching equipment of printing based on high-speed optical isolation, the utility model overcomes the not enough of current shared printing apparatus, through high-speed optical isolation unidirectional transmission system, the potential safety hazard of elimination information leakage guarantees the safety of data, sees the following description in detail:

a secure one-way printing sharing switching device based on high-speed optical isolation, the device comprising:

the first processor receives and processes the printing information of the intranet computer, and the printing information is transmitted to the third processor through the light emitter; the second processor receives and processes the printing information of the external network computer, and transmits the printing information to the third processor through the light emitter; and the third processor analyzes the received printing information through the optical receiver and sends the printing information to the printer.

Wherein the light emitter comprises:

the first capacitor C1 and the first resistor R1 are connected with the base electrode of the first triode Q1, the third resistor R3 is connected with the collector electrodes of the first triode Q1 and the second triode Q2, and the second resistor R2 is connected with the emitter electrode of the first triode Q1 and the base electrode of the second triode Q2; the first light emitting diode LED1 is connected with a power supply VCC and a third resistor R3; the Input end is the printing information coded by the first processor and the second processor.

Wherein the optical receiver includes:

the base electrodes of the first light emitting diode LED2, the fourth resistor R4 and the third triode Q3 are connected; the fifth resistor R5 is connected with the emitter of the third triode Q3 and the input of the negative end of the comparator U1; the input of the positive end of the comparator U1 is connected with the variable resistance end of the rheostat R6; after the second capacitor C2 and the eighth resistor R8 are connected in parallel, one end of the second capacitor C is connected with the comparator U1, and the other end of the second capacitor C is connected with the base electrode of the fourth triode Q4; the ninth resistor R9 is connected with a collector of the fourth triode Q4; the Output end Output is received coding information;

one end of the seventh resistor R7 is connected with the power supply VCC, and the other end of the seventh resistor R7 is connected with the eighth resistor R8 and the output end of the comparator U1.

The utility model provides a technical scheme's beneficial effect is:

1. physically isolating data of the internal network and the external network: the intranet computer goes to the printing sharing equipment and then to the printer; an external network computer reaches a printing sharing device and then a printer, and the whole channel adopts an optical one-way transmission mode to realize physical isolation;

2. the speed is high: the printing speed can reach 10Mb/S, and the printing speed is ensured to the maximum extent;

3. intelligent detection: the sharing switching equipment analyzes the received instruction, and alarms the non-printing information instruction to ensure the user experience; the equipment does not need to be additionally provided with other drivers, keeps the original printing habit, and has simple use and reliable performance.

To sum up, the utility model discloses both guaranteed the safety of printing information, had higher printing speed again, guaranteed that customer's use is experienced, use for the customer and provide convenience.

Drawings

FIG. 1 is a schematic diagram of a high-speed optical isolation-based secure unidirectional printing sharing switching device;

FIG. 2 is a schematic diagram of a light emitting end;

fig. 3 is a schematic diagram of a light receiving end.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention are described in further detail below.

Example 1

A secure one-way printing sharing switching device based on high-speed optical isolation, see fig. 1, comprising: processor 1, processor 2, processor 3.

The processor 1 receives and processes the printing information of the intranet computer 1, the information is sent by the optical transmitter, and the processor 3 receives the information sent by the optical transmitter by the optical receiver. The processor 2 receives and processes the printing information of the external network computer 2, the information is sent by the optical transmitter, and the processor 3 receives the information sent by the optical transmitter by the optical receiver. The processor 3 analyzes the received information and sends the information to the printer to realize the printing process.

Example 2

The scheme of example 1 is further described below in conjunction with fig. 1-3, and is described in detail below:

the processor 1 receives the printing information of the intranet computer, codes the printing information and sends the printing information to the processor 3, and a non-printing information instruction gives an alarm; the processor 2 receives the printing information of the external network computer, codes the printing information and sends the printing information to the processor 3, and the non-printing information instruction gives an alarm; and after receiving and analyzing the information, the processor 3 sends the data to a printer to realize the printing process.

As shown in fig. 2, in the light emitter circuit, a capacitor C1 and a resistor R1 are connected to the base of a transistor Q1, a resistor R3 is connected to the collectors of the transistors Q1 and Q2, and a resistor R2 is connected to the emitter of Q1 and the base of Q2; LED1 is connected with power VCC and resistor R3.

The Input is information coded by the processor 1 and the processor 2, and the R1 is a current-limiting resistor to prevent the base current of the Input Q1 from being too large; c1 is an accelerating capacitor, when an Input signal rises and falls, the parallel R1 resistor can be bypassed instantaneously and sufficient base current is provided, so that the reaction time of the Input signal is shortened, the reaction speed is increased, and the accelerating effect is achieved; the triode Q1 can improve the driving capability of a front end signal and ensure the starting voltage of the base level of the triode Q2; the speed of the light emitter LED1 can be increased to 10Mb/S through the combination of the capacitor C1 (100 pf), the resistor R1 (1K), the triode Q1 (S9018) and the triode Q2 (S9018).

As shown in fig. 3, the light receiver LED2 is connected to a resistor R4 and a base of a transistor Q3; the resistor R5 is connected with the emitter of the triode Q3 and the input of the negative end of the comparator U1; the input of the positive end of the comparator U1 is connected with the variable resistance end of the rheostat R6; after the capacitor C2 and the resistor R8 are connected in parallel, one end of the capacitor C is connected with the comparator U1, and the other end of the capacitor C is connected with the base electrode of the triode Q4; the resistor R9 is connected with a collector of the triode Q4; output is the received encoded information.

The current received by the LED2 optical sensor is amplified through a triode Q3, and after amplification, a threshold signal is screened through a comparator U1, so that the signal sensitivity is improved; the R6 rheostat can adjust threshold voltage; the reaction time of the signal is reduced by an accelerating capacitor C2; the driving capability of the output signal is improved by the transistor Q4. Through the combination of the triode Q3 (S9018), the resistor R6 (10K), the comparator U1 (LM 393), the capacitor C2 (100 pf), the resistor R8 (1K) and the triode Q4 (MMBT 3904), the rate of receiving signals is guaranteed to be more than 16Mb, and the Output signals are guaranteed to be consistent with the Input signals transmitted by the front end.

The utility model discloses a working process is: after the equipment is powered on, the processor 1 waits for receiving the printing information of the intranet computer, and the processor 2 waits for receiving the printing information of the extranet computer; and after receiving the printing information, coding a user-defined transmission protocol, transmitting the coded information to the processor 3 through the unidirectional optical pair tube, decoding the received information by the processor 3, and sending the decoded information to a printer for printing to finish the whole printing process.

Through the operation, the process from the intranet computer and the extranet computer to the printer is completely unidirectional, and the calculator cannot acquire the cache data in the printer, so that the physically-isolated shared printing switching is realized.

The embodiment of the utility model provides a except that doing special explanation to the model of each device, the restriction is not done to the model of other devices, as long as can accomplish the device of above-mentioned function all can.

Those skilled in the art will appreciate that the drawings are only schematic illustrations of preferred embodiments, and the above-mentioned serial numbers of the embodiments of the present invention are only for description and do not represent the merits of the embodiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A secure unidirectional printing sharing switching device based on high-speed optical isolation, characterized in that the device comprises: a first processor and a second processor connected in parallel,

the first processor is connected with an intranet computer, and the second processor is connected with an extranet computer;

the first processor and the second processor are both connected with a third processor through a light emitter, and the third processor is connected with a printer through a light receiver;

the light emitter includes:

the first capacitor (C1) and the first resistor (R1) are connected with the base electrode of the first triode (Q1), the third resistor (R3) is connected with the collector electrodes of the first triode (Q1) and the second triode (Q2), and the second resistor (R2) is connected with the emitter electrode of the first triode (Q1) and the base electrode of the second triode (Q2); the first light-emitting diode (LED 1) is connected with a power supply (VCC) and a third resistor (R3); the Input end (Input) is the printing information coded by the first processor and the second processor;

the optical receiver includes:

the first light emitting diode (LED 2) is connected with the base electrodes of the fourth resistor (R4) and the third triode (Q3); the fifth resistor (R5) is connected with the emitter of the third triode (Q3) and the input of the negative end of the comparator (U1); the positive end input of the comparator (U1) is connected with the rheostat end of the rheostat (R6); after the second capacitor (C2) and the eighth resistor (R8) are connected in parallel, one end of the second capacitor is connected with the comparator (U1), and the other end of the second capacitor is connected with the base electrode of the fourth triode (Q4); the ninth resistor (R9) is connected with a collector of the fourth triode (Q4); the Output end (Output) is the received coding information;

one end of the seventh resistor (R7) is connected with the power supply VCC, and the other end of the seventh resistor (R7) is connected with the output ends of the eighth resistor (R8) and the comparator (U1).