Fibre-optical force sensor, fabrication method and detection device using the sensor

摘要

Sensor support (1) which carries a multimode fiber optic cable (14) has a periodic network of perforations (12) in which the cable is threaded. The period and the curvature of the micro-curves (16) are constant with the perforations made in the most contained areas of the support (1) along optimum directions. In areas of lesser constraint the direction of the cable is not optimum. Strain gauge device includes a light source to send light into the fiber optic cable and a photodetector to receive data relating to the luminous intensity of light transmitted by the fiber. The optimum cable direction is dependent on the intersection of the radius of curvature and the perpendicular to the curvature plane of the support (1).