The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 1995
Filed:
Jul. 06, 1992
Youssef A Hamidieh, Bloomfield Hills, MI (US);
Brij B Seth, Canton, MI (US);
Ford Motor Company, Dearborn, MI (US);
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.