Spring having a built-in deformation sensor

A method for measuring a load on at least one wheel of a vehicle, the method comprising:

• installing at least one optical fiber with Bragg cells, forming a sensor for measuring deformations and comprising the Bragg cells, in a spring, the spring including a composite structure comprising reinforcement fibers within a matrix, the optical fiber being positioned within the matrix of the spring;
• emitting, by a source module, tight signals toward each Bragg cell;
• each Bragg cell returning a light signal to a receiver module;
• converting, at the receiver module, the light signals into output data and transmits the output data to a processor module;
• and
• processing, at the processor module, the output data and calculating the toad on the wheel equipped with the spring.