Structure-borne sound detector for an intruder alarm system
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United States of America Patent
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Feb 11, 1997
Grant Date -
N/A
app pub date -
Jan 19, 1995
filing date -
Jan 20, 1994
priority date (Note) -
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Abstract
The detector contains a structure-borne sound microphone connected to an electronic evaluation unit with a piezoelectric sensor (18) for structure-borne sound vibrations. This sensor has a vibrating bar (28), which is attached by means of hybrid technology to a carrier (27). The vibrating bar (28) is formed by a bimorph element and the carrier by an electrically conductive ceramic wafer.
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