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Control unit of emergency broadcast

An emergency broadcasting and control unit technology, applied in broadcasting system control, broadcasting specific applications, etc., can solve the problems of complicated installation, poor compatibility, poor scalability, complicated circuit and structure, etc., to achieve simple circuit design and facilitate quantitative production. , the effect of low manufacturing cost

Inactive Publication Date: 2013-12-04
TIANJIN BEIHAI COMM TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

Traditional emergency broadcast control equipment is backward in technology, poor in compatibility and scalability, overly complicated in circuit and structure, complex in use, and unreliable, and has technical problems such as complicated installation, inconvenient maintenance, and high failure rate

Method used

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  • Control unit of emergency broadcast

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Embodiment Construction

[0018] Such as figure 1 As shown, an emergency broadcast control unit of the present invention includes a microphone module, a line audio module, a power supply module, a volume adjustment module, a source selection module and a marshalling selection module;

[0019] The microphone module includes two microphone audio inputs, and the two microphone audio inputs are combined into one microphone audio source input through an adder and then connected to the input end of the volume adjustment module through an audio amplification and pressure limit control module. The output end of the volume adjustment module is connected to the input end of the source selection module through an operational amplifier, and the output end of the operational amplifier is also connected to the microphone volume indicating circuit;

[0020] The line audio module includes two lines of line audio inputs, the two lines of line audio inputs are connected through six lotus sockets, and the two lines of li...

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Abstract

The invention provides a control unit of an emergency broadcast. The control unit comprises a microphone module, a line voice frequency module and a power source module, wherein an microphone voice frequency message source input in the microphone module is connected with input ends of a volume adjustment module and a message source selection module through a voice frequency amplification and voltage limiting control module, three line voice frequency message source inputs in the line voice frequency module are connected with an input end of the message source selection module through an operational amplifier and the volume adjustment module, an output end of the message source selection module is respectively connected with input ends of a plurality of marshalling selection modules, and an output end of each marshalling selection module forms an emergency broadcast to be output by means of the operational amplifier. The control unit has the advantages that message source selection can be performed on microphone voice frequency input and line voice frequency input through the message source selection module, selected message sources are broadcasted to selected marshalling regions through the marshalling selection modules to achieve control of the emergency broadcast; and the control unit has the advantages of being simple in circuit design, convenient to operate, low in manufacture cost, capable of facilitating quantization production, and the like.

Description

technical field [0001] The invention belongs to the field of voice broadcasting, in particular to an emergency broadcasting control unit. Background technique [0002] Train broadcasting, as a special media, undertakes the tasks of serving passengers, publicizing policies, directing emergency rescue in emergencies, emergency evacuation, accident handling and timely communication. Traditional emergency broadcast control equipment is backward in technology, poor in compatibility and scalability, overly complicated in circuit and structure, complex in use, and unreliable, and has technical problems such as complicated installation, inconvenient maintenance, and high failure rate. Contents of the invention [0003] The problem to be solved by the present invention is to provide an emergency broadcast control unit with simple structure and convenient operation, which is especially suitable for controlling emergency broadcast in a railway network broadcast system. [0004] In o...

Claims

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Application Information

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IPC IPC(8): H04H20/59H04H60/09
Inventor 顾媛珅
Owner TIANJIN BEIHAI COMM TECH
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