PULSED ECHO SENSING DEVICE AND METHOD FOR AN ORTHOPEDIC JOINT
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United States of America Patent
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Issued Date -
Dec 30, 2010
app pub date -
Mar 26, 2010
filing date -
Jun 30, 2009
priority date (Note) -
Abandoned
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Abstract
At least one embodiment is directed to a sensor for measuring a skeletal system. A signal path of the system comprises an amplifier (612), a sensor element, and an amplifier (620). The sensor element comprises a transducer (4), a waveguide (5), and a reflecting surface (30). An external condition is applied to the sensor element. For example, the sensor element is placed in an artificial orthopedic joint to measure loading of the joint. Pulsed energy waves are emitted by the transducer (4) into the waveguide (5) and the reflected back to be received by the transducer (4). The transit time of each pulsed energy wave corresponds to the external condition applied to the sensor. The transducer (4) outputs a signal corresponding to each pulsed energy wave. A detection circuit edge detects the signal and outputs a pulse to the transducer (4) to generate a new pulse energy wave.
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