Station control box interface splitter

A brancher and interface technology, applied in the field of station host control box interface expansion equipment, can solve the problems of waste of resources, repeated operations, waste of manpower and material resources, and achieve the effect of reducing costs, meeting on-site needs, and increasing the number of
CN101917495BInactive Publication Date: 2012-11-28天津七一二移动通信有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
天津七一二移动通信有限公司
Publication Date
2012-11-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a station control box interface splitter, which comprises a 485 protocol processor A, a 485 protocol processor B, a splitter CPU, a relay, an operational amplifier and a switching circuit. The splitter CPU is connected with the 485 protocol processor A, the 485 protocol processor B, the relay and the switching circuit respectively; a 485 serial data port is formed on the splitter CPU; a 485 serial data port I is formed on the 485 protocol processor A; a 485 serial data port II is formed on the 485 protocol processor B; an S1 pin of the relay is connected with an output interface of an MIC audio signal, an A pin of the relay is connected with an input interface I of the MIC audio signal and a B pin of the relay is connected with an input interface II of the MIC audio signal; an AF audio signal input interface, an AF audio output interface I and an AF audio output interface II are formed on the operational amplifier; and the switching circuit is provided with a DC 13.8V power input interface, a power output interface I and a power output interface II. The station control box interface splitter has the advantages of expanding a station control box interface, increasing the number of external station control boxes, making a plurality of attendants share the same radio station, reducing the system cost and meeting the on-site demand.
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Description

technical field

[0001] The invention relates to an interface expansion device of a platform host control box, in particular to a station platform control box interface splitter used in a 450MHz railway wireless train dispatching system. Background technique

[0002] The railway wireless train dispatching communication system mainly completes the communication functions of the big triangle (communication between the dispatcher, station, locomotive / car captain) and the communication function of the small triangle (communication between the station attendant, locomotive / car captain), which is to ensure the safety of railway traffic. Foundation. There are more than 70,000 kilometers of railways in my country and more than 6,000 stations. Each station is equipped with wireless train dispatching communication equipment. Usually, each station radio station is equipped with a platform control box, and the station attendant completes the communication with the dispatcher, station, a...

Claims

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