Elastomer degradation sensor using a piezoelectric material
Patent
·
OSTI ID:6726228
This patent describes a method and apparatus for monitoring the degradation of elastomeric materials. Piezoelectric oscillators are placed in contact with the elastomeric material so that a forced harmonic oscillator with damping is formed. The piezoelectric material is connected to an oscillator circuit. A parameter such as the resonant frequency, amplitude or Q value of the oscillating system is related to the elasticity of the elastomeric material. Degradation of the elastomeric material causes changes in its elasticity which, in turn, causes the resonant frequency, amplitude or Q of the oscillator to change. These changes are monitored with a peak height monitor, frequency counter, Q-meter, spectrum analyzer, or other measurement circuit. Elasticity of elastomers can be monitored in situ, using miniaturized sensors.
- Assignee:
- Dept. of Energy, Washington, DC (USA)
- Patent Number(s):
- US 4906917; A
- Application Number:
- PPN: US 7-359463A
- OSTI ID:
- 6726228
- Country of Publication:
- United States
- Language:
- English
Similar Records
Elastomer degradation sensor using a piezoelectric material
Sensors for in situ monitoring of elastic properties
Degradation of elastomers in geothermal environments
Patent
·
Sun Dec 31 23:00:00 EST 1989
·
OSTI ID:867290
Sensors for in situ monitoring of elastic properties
Technical Report
·
Tue Apr 11 00:00:00 EDT 1989
·
OSTI ID:6219025
Degradation of elastomers in geothermal environments
Conference
·
Mon Dec 31 23:00:00 EST 1979
· Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)
·
OSTI ID:5139467