Interference isolation device of railway coaxial cable
A coaxial cable and isolation device technology, applied in the field of signal transmission, can solve problems such as interference signals and anti-jamming devices not working, and achieve strong interference isolation capabilities, avoid abnormal interference, and avoid channel errors
Pending Publication Date: 2018-09-11
中国铁路南昌局集团有限公司福州电务段
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Problems solved by technology
[0002] The railway system has high requirements on the reliability of communication. Because the coaxial circuit used in railway communication is generally set up in the field, there will often be interference signals, and the conventional anti-interference device cannot work when the power is off. How to design it to have higher performance An anti-interference device that can adapt to harsh power supply environments is a research direction
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[0019] Such as Figure 1-3 As shown, the interference isolation device of a railway coaxial cable, the interference isolation device includes a coaxial cable network cable input end, a first isolation circuit, a second isolation circuit, a network shaft cable network cable output end, and a power-off switch; first isolation The circuit includes first and second photoelectric conversion circuits, the optical output end of the first photoelectric conversion circuit is connected to the optical input end of the second photoelectric conversion circuit; the second isolation circuit is a passive circuit including an inductive coupling circuit;
[0020] When the power supply of the interference isolation device is normal, the power-off switch sets the connection channel between the coaxial cable network cable input end and the coaxial cable network cable output end as the first isolation circuit, and the first photoelectric conversion circuit sets the coaxial cable The electrical signal ...
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The invention provides an interference isolation device of a railway coaxial cable. The device comprises a coaxial cable reticle input end, a first isolation circuit, a second isolation circuit, a coaxial cable reticle output end, and a power-off selector switch; the first isolation circuit comprises a first photoelectric conversion circuit and a second photoelectric conversion circuit; the secondisolation circuit comprises an inductive coupling circuit; when the power supply of the interference isolation device is normal, a connecting channel between the coaxial cable reticle input end and the coaxial cable reticle output end is arranged as the first isolation circuit, thereby isolating an interference signal between the coaxial cable reticle input end and the coaxial cable reticle output end through twice photoelectric conversion; when the power supply of the interference isolation device is cut off, the connecting channel between the coaxial cable reticle input end and the coaxialcable reticle output end is arranged as the second isolation circuit by the power-off selector switch set, an electric signal of the coaxial cable reticle input end is transitted to the coaxial cablereticle output end through the inductive coupling circuit. The interference isolation device provided by the invention has strong interference isolation capacity and the signal transmission can be still performed in the power off.
Description
Technical field [0001] The invention relates to the technical field of signal transmission, in particular to an interference isolation device for railway coaxial cables. Background technique [0002] The railway system has high requirements for the reliability of communication. Because the coaxial circuit used in railway communication is generally erected in the field, there will often be interference signals. However, the conventional anti-jamming device cannot work in the case of power failure. How to design it to have higher performance And the anti-jamming device that can adapt to the harsh power supply environment is a research direction. Summary of the invention [0003] The present invention proposes an interference isolation device for railway coaxial cables, which has strong interference isolation capability and can still carry out signal transmission when the power is off. [0004] The present invention adopts the following technical solutions. [0005] An interference iso...
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IPC IPC(8): H04B10/80
CPCH04B10/802H04B10/806Y02D30/70
Inventor 赵伟陈志忠刘伟玲蔡云林桢黄艳刘晓琴
Owner 中国铁路南昌局集团有限公司福州电务段