Patent ID: 11885699
Assignee: HUMANETICS INNOVATIVE SOLUTIONS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A system for detecting forces during a collision test where the system undergoes a sudden impact causing deformation in a short time span, said system comprising:
a plurality of components forming a part of at least one of a vehicle, a testing stand, and/or an anthropomorphic test device, wherein at least one of said plurality of components includes a joint between adjacent components;
at least one optical fiber supported by and in contact with at least one of said components with said optical fiber extending between a first end and a second end along a fiber axis, said at least one optical fiber extending across said joint and is fixed at a plurality of points adjacent said joint;
said optical fiber having a plurality of cores extending between said first and said second ends, each of said cores having a plurality of grating sensors inscribed integrally therein with said sensors spaced along a length between said first and said second ends;
an emitter in communication with said optical fiber for emitting a light having a predetermined band of wavelengths through said plurality of cores of said optical fiber that is reflected by said sensors; and
an interrogator in communication with said optical fiber for detecting said reflected light from said plurality of grating sensors such that changes to the reflected light indicate a strain on said optical fiber;
wherein said plurality of cores are further defined as having at least one location along said respective length where said plurality of cores are helically wound about each other along said fiber axis and wherein said location extends across said joint such that movement at said joint causes strain on said optical fiber that stretches and compresses said grating sensors thereby changing the reflection of the light from each of said plurality of cores that is used to measure torsion of said plurality of components about said joint.