Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1992-07-06
1995-04-18
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
73104, 73660, 340683, 36447417, G08B 2100
Patent
active
054072654
ABSTRACT:
Failure detection in an operating cutting tool utilizing a frequency domain analysis of the vibration of the cutting tool. A signal is generated based on vibration of the tool during its operation to determine the energy of the signal in a plurality of signal component frequency bands. The energy of the signal in each of the plurality of frequency bands is compared to corresponding threshold values to generate a tool failure signal when the energy of the signal in a preselected number of frequency bands exceeds the corresponding threshold values for a predetermined period of time. In a second embodiment, time domain analysis of the signal generated based on vibration of the tool is utilized in addition to frequency domain analysis. The averaged signal is compared to a threshold signal to generate a tool failure signal when both the energy of the signal in a preselected number of frequency bands exceeds the corresponding threshold values and the averaged signal exceeds the threshold signal.
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Hamidieh Youssef A.
Seth Brij B.
Ford Motor Company
Malleck Joseph W.
May Roger L.
Mullen Jr. Thomas J.
Peng John K.
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