Sensing device for detecting an alarm bell a siren

摘要

Sensing device (10) for detecting an alarm bell of a siren (50), comprising:a sound sensor (11), which is configured to set the alarm bell the siren (50) to detect and to generate corresponding to a first sound signal,a signal filter (12), the electrically with the sound sensor (11) is connected, in order to filter out interference noise from the first sound signal,a signal amplifier (13), the electrically with the signal filter (12) is connected to the filtered, to reinforce the first sound signal,a microprocessor (14), the electrically with the signal amplifier (13) is connected and a memory (141), wherein the microprocessor (14) the amplified, first sound signal from the signal amplifier (13) and receives the first sound signal with a second sound signal, which in the memory (141) is stored, compares in order, in accordance with a comparison result between the first acoustic signal and the second sound signal to output a decision signal,a signal transmitter (15), the electrically with the microprocessor (14) and receives the decision signal is connected, in order to output an alarm bells signal.