Sensor device
February 13, 2009. 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 2669877 3062052 3697917 Method and apparatus for sound production Method and sensor device for measuring a physical parameter utilizing an oscillatory, light modulation element Semiconductor transducers employing ion implantation terminal configurations Optical resonator single-mode fiber hydrophone Resonator having optical feedback coupling Fiber optics condition sensor and method of making same Optical transducer and measuring device Patent #: 4670649 InventorsAssigneeApplicationNo. 310501 filed on 02/13/1989US Classes:73/702Vibration typeExaminersPrimary: Raevis, RobertAttorney, Agent or FirmForeign Patent References
International ClassesG01L 011/00753 DIG. 1 Foreign Application Priority Data1986-11-03 GBAbstractA pressure sensor includes a resonator element (14) mounted on an optical fibre ferrule (11) whereby light signals for maintaining the resonator in a state of oscillation and for returning a modulated signal to a remote station are coupled to the resonator. The resonator is located in an evacuated cavity and is mounted on a flexible diaphragm whereby pressure changes may be detected as changes in the resonant frequency.Field of SearchVibration typeVibrating strip or wire Photoelectric With electrical readout Electromagnetic Temperature Coupling circuit for specific additional purpose (e.g., noise suppression) or having specified structure Specified signal transmitting link Bonded to specimen Vibratory element Optical By measuring vibrations (e.g., resonant frequency) By measuring vibrations (e.g., resonant frequency) Including weight determination Including axial force determination Resonance, frequency, or amplitude study With light beam indicator MATERIAL STRAIN ANALYSIS By light interference detector (e.g., interferometer) With optical, piezoelectric or acoustic coupling means By a vibratory effect (e.g., resonant frequency, acoustical) | |
