ALARM

ALARM

PROBLEM TO BE SOLVED: To allow appropriate control of the volume of output sound indicating an abnormality or a fault, such as fire.SOLUTION: An alarm is powered by a battery 34. An alarm processing section 68 causes an alarm sound indicating an abnormality to be output from a speaker 36 of a notifi...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: ASANO ISAO, NISHIZAKI HIROMU
Format: Patent
Sprache:eng
Schlagworte:
ALARM SYSTEMS
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To allow appropriate control of the volume of output sound indicating an abnormality or a fault, such as fire.SOLUTION: An alarm is powered by a battery 34. An alarm processing section 68 causes an alarm sound indicating an abnormality to be output from a speaker 36 of a notification section 32 when detecting an abnormality from a detection signal of a sensor section 26. An alarm volume control section 70 instructs a gain control section 64 to perform gain control in a manner that an initial alarm volume is higher than a predetermined value and a subsequent alarm volume is lower than the initial volume, so as to cause an alarm sound indicating a fault to be output when detecting a fault, such as a decrease in battery voltage of the alarm processing section 68 and a failure in the sensor section 26.