Methods and apparatus for sensing the mechanical application of

Details Methods and apparatus for sensing the mechanical application of Methods and apparatus for sensing the mechanical application of

1986-10-10

1988-07-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231P, 128780, G01D 534

Patent

active

047571942

ABSTRACT:
A probe for sensing the mechanical application of force is described wherein the terminus of at least one optical fiber is provided at a preselected distance from a reflective surface. The reflective surface is reciprocatively mounted relative to the fiber wherein application of steady mechanical force to the reflective surface mounting means causes the reflective surface to move closer to the fiber terminus. A light source and reflected light intensity sensing means are provided. The probe is desensitized to pressure differentials across the fiber terminus-reflective surface distance by providing an atmospheric vent to the space to be sensed. In a preferred embodiment, the catheter-sheathed optical fiber and reflective surface mounting means are used to detect impending incontinence whose onset is signalled to a health care provider by an audible alarm.

REFERENCES:
patent: 3215135 (1965-11-01), Franke
patent: 3273447 (1966-09-01), Frank
patent: 3580082 (1971-05-01), Strack
patent: 4158310 (1979-06-01), Ho
patent: 4210029 (1980-07-01), Porter
patent: 4487206 (1984-12-01), Aagard
patent: 4543961 (1985-10-01), Brown
patent: 4611600 (1986-09-01), Cohen
Charles M. Davis, "Fiber Optic Sensors: An Overview", Optical Engineering, 24, No. 2: 347-351, (Mar./Apr. 1985).

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