Surgery – Truss – Pad
Patent
1995-01-27
1997-04-15
Jaworski, Francis
Surgery
Truss
Pad
73 5441, 128 736, 374117, A61B 800, G01K 1122, G01N 1110
Patent
active
056199970
ABSTRACT:
A passive sensor system utilizing ultrasonic energy is disclosed. The passive sensor system includes at least one ultrasonically vibratable sensor and an ultrasonic activation and detection system. The sensor has at least one vibration frequency which is a function of a physical variable to be sensed. The ultrasonic activation and detection system excites the sensor and detects the vibration frequency from which it determines a value of the physical variable. The sensor includes a housing, a membrane which is attached to the housing and which is responsive to the physical variable, a vibratable beam attached to the housing at one end and a coupler, attached to the membrane and to a small portion of the vibratable beam, which bends the vibratable beam in response to movement of the membrane.
REFERENCES:
patent: 3853117 (1974-12-01), Murr
patent: 4265251 (1981-05-01), Tickner
patent: 4513750 (1985-04-01), Heyman et al.
patent: 5195520 (1993-03-01), Schlief et al.
W.K. Schomburg, et al., "Mikromembranen fur beruhrugslose Messungen mit Ultraschall", VDI Berichte No. 939, 1992.
English Translation of W.K. Schomburg, et al., "Micromembranes for Contactless Measurements Using Ultrasound", VDI Berichte No. 939, 1992.
Jaworski Francis
Mizur Technology Ltd.
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