Force measuring device with optical sensor compensating off-centre loading, particularly for weighing persons and process for producing such an apparatus

摘要

The appts. includes coils of optical fibre (6) which are prestressed between circular plates (4) (5) due to the action of a tie member (70) and the assembly is located between the measuring platform (2) and a base (3). The deformation of the optical fibres under the force applied to the measuring platform (2) cause a phase shift which may be measured using a laser diode and an optoelectronic convertor. The protective sheath on the optical fibres is partially removed and additional coils (6') are added.