Acoustic sensor for monitoring machining processes in machining tools
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United States of America Patent
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Jun 27, 2006
Grant Date -
Sep 29, 2005
app pub date -
Jan 21, 2003
filing date -
Feb 28, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An acoustic sensor for monitoring machining processes in machining tools, e.g. grinding machines, includes a stationary unit, or stator (21) and a rotating unit, or rotor (23), the latter being coupled, for instance, to the grinding wheel and rotating with it. The rotor includes a support (45;45') and a piezoelectric transducer (33). The position of the transducer is defined and locked without using glues by means of mechanical elements (48, 53, 54; 63, 64; 74, 78) that may include elastic elements such as springs. The rotor also includes a printed circuit board (55), connected to the piezoelectric transducer, with a charge amplifier (37) for amplifying the output signal of the piezoelectric transducer. The rotor is electrically coupled to the stator by means of transformer type couplings (30, 31).
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