Vibration sensing method and apparatus therefor
Patent 5703295 Issued on December 30, 1997. Estimated Expiration Date: 
November 28, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 28, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References H372 System for monitoring bearings and other rotating equipment Piezoelectric reed power supply for use in abnormal tire condition warning systems Force detector/indicator Piezoelectric generation of electrical power from surface waves on bodies of water using suspended weighted members Patent #: 5578889 InventorsAssigneeApplicationNo. 563581 filed on 11/28/1995US Classes:73/593, Bearing, gear, or related moving mechanism73/660, Rotating machinery or device310/339, Voltage, spark or current generator340/682, Bearing340/683, Vibration713/321Programmable calculator with power saving featureExaminersPrimary: Williams, HezronAssistant: Miller, Rose M. Attorney, Agent or FirmForeign Patent References
International ClassesG01L 001/00G01H 013/00 Foreign Application Priority Data1994-11-28 JPAbstractA vibration sensing apparatus including an acceleration sensor 2 for outputting a sensing signal corresponding to a vibrating acceleration, a level discriminator 3 for generating an output when the output level of the signal from the acceleration sensor 2 exceeds a preset reference level, a display unit 4 for displaying the output of the level discriminator 3, a piezoelectric ceramic power generating unit 5 using piezoelectric ceramics for generating a charge when it is subjected to vibration, and a conversion unit 6 for converting the charge generated by the piezoelectric ceramic power generating unit 5 into DC power, the DC power being supplied to the level discriminator and to the display unit as power to be consumed by them. | |
