Emergency broadcasting circuit for broadcasting console

Abstract

The invention provides an emergency broadcasting circuit for a broadcasting console, which comprises an emergency switch S1, a relay JDQ1 and an external output socket CH1, wherein the emergency switch S1 is connected with a coil of the relay JDQ1; two ends of the coil of the relay JDQ1 are parallelly connected with diodes D1; and the switching contact of the relay JDQ1 is connected with a first pin and a second pin of the external output socket CH1. The JDQ1 is obligatorily controlled directly via the emergency switch S1, the problem of single chip microcomputer crash caused by static electricity, fast electricity and other interference can be solved, the circuit design is simplified, reliability of the device is improved, and safe insurance is provided for outgoing of a passenger.

Description

Technical field [0001] The invention belongs to the field of circuit design, and particularly relates to an emergency broadcast circuit for a broadcast console. Background technique [0002] Such as figure 1 As shown, it is an emergency broadcasting circuit diagram of an existing broadcasting console. The working principle is as follows: The single-chip microcomputer judges whether the emergency button is pressed through IO1. If it is pressed, IO2 outputs a high level, drives the relay JDQ1 through a 1Q1 transistor, and outputs to the external output interface 1CH4 The power amplifier, the power amplifier detects the JDQ1 pull-in dry contact for emergency broadcast. The so-called emergency broadcast is broadcast in emergency situations, such as fire, such as figure 1 As shown, the operations during emergency broadcast are all realized by single-chip microcomputer software. According to the test data and field data, the soft faults are far greater than the hardware faults. If the ...

AI Technical Summary

Problems solved by technology

[0005] The advantages and positive effects of the present invention are: due to the adoption of the above-mentioned technical scheme, the relay JDQ1 is directly controlled through the emergency button rigidly, which solves the problem of the single-chip microcomputer crash caused by interference such as static electricity and fast electricity, simplifies the circuit design, and improves the efficiency at the same time. The reliability of the equipment improves the anti-interference ability of the equipment, reduces equipment failure, and provides safety guarantee for passengers' travel

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