Differential fiber optic differential pressure sensor

摘要: A differential sensor unit precisely monitors ambient pressure within a confined space, such as blood or intracranial of human patient, utilizing fiber optic light guides. Three guides pass pneumatic line into one end rigid cylindrical envelope which may be inserted vein artery implanted in the skull. The other is bounded by flexible membrane. Of external ends guides, faces source and each others detector. reflective surface attached to internal face Within are arranged respond movement membrane due change across so that motion relative varies transmitted from first guide consequently intensity sensed detectors can actuate display controls acting through adjust match surrounding thereby measure pressure.