Patent ID: 6679119
Filing Date: 2004-01-20
Classification: G01H,G01L,G01N

Abstract:
A multi-function stress wave sensor for detecting, measuring and processing logically complementary input parameter signals indicative of a machine's health, in communication with an electronic assembly, said sensor comprising:a transducing element generating a primary resonant frequency; energy conversion circuitry in communication with said transducing element; and a plurality of filter networks in communication with said energy conversion circuitry, said plurality of filter networks attenuating certain frequencies of said signals, wherein said sensor has a resonant gain at its primary resonant frequency to allow for selective amplification of stress waves received from friction and mechanical impacts; wherein said plurality of filter networks includes a band or high pass filter and a low pass filter; wherein said sensor has a resonant output of a specific amplitude, said resonant output decaying to half amplitude by a predetermined number of cycles.