Apparatus for detecting transducer movement

Details Apparatus for detecting transducer movement Apparatus for detecting transducer movement

A - Human Necessities

61

B

A61B 5/11 (2006.01) A61B 5/024 (2006.01) G01P 13/00 (2006.01)

Patent

CA 2052682

APPARATUS FOR DETECTING TRANSDUCER MOVEMENT Abstract of the Disclosure An apparatus for photo-optically detecting transducer motion using a photodetector resiliently suspended inside the transducer housing and photo-optically coupled to a light source. During movement the inertia effect of the photodetector along with the resilient suspension system causes the changes in the photo-optical coupled between the photodetector and the light source. The inertia effect of the photodetector is enhanced by adding a mass to the photodetector. Either the magnitude or the phase of the photodetector output is monitored to detect movement. In another embodiment, a light emitter is resiliently suspended so that movement induced changes in the position of the light emitter alter the coupling of light to one or more light detectors.

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