PRESSURE SENSOR

摘要

A pressure sensor and associated pressure sensing process relies on detecting multiply scattered light or other wave-propagating energy within an optical cavity or other integrating sphere. The interior of the cavity comprises either a light scattering surface on the inside face of the cavity, or a material having lights scattering properties filling the cavity, which in either case result in an increase in scattered light intensity in the region surrounding the slight source. An energy source and a detector wihtin the cavity are positioned sufficiently close to together to permit the detector to measure the increased intensity resulting from deformation of the cavity. Changes in the volume of the cavity are sensed by the change in sampled light intensity. Pressure sensitive mats with a high density of sensor are assembled using optical fiber technology. The device may also be adapted to employ sound waves as the scattered energy source.