ALARM BROADCASTING SYSTEM HAVING AN ERRONEOUS OPERATION PREVENTING APPARATUS AND A METHOD FOR CONTROLLING AN ERRONEOUS OPERATION OF AN ALARM BROADCASTING SYSTEM, PARTICULARLY CONCERNED WITH PREVENTING AN ERRONEOUS OPERATION OF AN ALARM BROADCASTING SYSTEM IN ADVANCE BY ACCURATELY AND RELIABLY CONSTRUCTING AN ALARM BROADCASTING SYSTEM, AND PROVIDING A SAFE CONTROL METHOD FOR INTERRUPTING OPERATION OF AN ALARM BROADCASTING SYSTEM AFTER ERRONEOUS OPERATION

摘要

PURPOSE: An alarm broadcasting system having an erroneous operation preventing apparatus and a method for controlling an erroneous operation of an alarm broadcasting system are provided to prevent an erroneous operation by accurately and reliably controlling an amplifier of an alarm broadcasting system, and minimize an erroneous operation caused by the falling of a thunderbolt and an error of an emergency alarm system. CONSTITUTION: A receiving unit(100) receives an operating signal from a broadcast notice command center. A signal selecting unit(700) selects a broadcasting notice signal according to a control signal corresponding to the operating signal. An amplifier(300) and a speaker(400) output the broadcasting notice signal. A speaker operation detecting sensor(600) detects an operational state of the speaker(400) for outputting a detecting signal. A noncontact relay(800) switches power supply of the amplifier(300). A control unit(200) controls the noncontact relay(800) and the signal selecting unit(700) according to the receipt of the operational signal and the speaker operation detecting signal.