Electromagnetic induction information isolated transmission system based on magnetic line medium

Abstract

The invention relates to an electromagnetic induction information isolated transmission system based on a magnetic line medium, belongs to the technical field of isolated transmission, and aims to solve the problem of information transmission security risk due to reverse transmission leakage of Intranet or internal information since metal cables are adopted for direct connection in the prior art.According to the adopted technical scheme, the electromagnetic induction information isolated transmission system comprises a controlling device and a controlled device, wherein an isolated transmission channel is arranged between the controlling device and the controlled device; an electromagnetic relay is arranged in the isolated transmission channel; an independent power supply non-common ground design is adopted for the controlling device and the controlled device; the electromagnetic relay consists of a coil J and a contact switch K; a magnetic induction field is generated through controlof current in the coil J to trigger and control the switch-on and switch-off of the switch K; and isolated transmission of control command information between the controlling device and the controlled device is realized through level conversion.

Description

technical field [0001] The invention belongs to the field of isolation transmission technology, in particular to an electromagnetic induction information isolation transmission system based on a magnetic force line medium. Background technique [0002] Between the control device and the controlled device, in order to avoid mutual interference or ensure the safety of control information, it is often necessary to take corresponding isolation measures. Especially when it comes to the field of information security transmission, physical isolation measures at both ends of information transmission are necessary means for information security transmission. In order to ensure the safety of the control instruction information transmission process, prevent the internal network or internal information leakage caused by the direct connection of the control instruction with metal cables, resulting in information transmission security risks. Contents of the invention [0003] The prese...

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Problems solved by technology

[0003] The present invention overcomes the deficiencies in the prior art, and solves the problem in the prior art that the leakage of intranet or internal information transmission caused by the direct connection of metal cables, resulting in information transmission security risks, aims to provide a magnetic field line-based The electromagnetic induction type information isolation transmission system of the medium, this system utilizes the physical characteristics of the contact switch of the magnetic force line, combines the design technology of the level conversion and the two ends of the isolation area to form a non-contact, non-metallic cable connection control command Information isolation transmission

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