Resin impregnation measurement device

A resin impregnation measurement device comprising:

• jigs, each of the jigs being formed into an inner surface shape of a protrusion of a stringer of a composite material, each of the jigs comprising outer surfaces comprising a facing surface that is to face an inner surface of the protrusion, wherein:
• the outer surfaces of each of the jigs are approximately identical to the inner surface of the protrusion,
• the stringer comprises a fiber base material and a resin, and is formed by a method including impregnating the fiber base material with the resin, and
• the jigs are disposed so that a longitudinal direction of each of the jigs intersects a flow direction of the resin;
• resin impregnation sensors, each of the resin impregnation sensors being disposed on the facing surface of a corresponding one of the jigs, wherein
• each of the resin impregnation sensors is configured to detect at least an electrostatic capacity value indicating whether the fiber base material is impregnated with the resin or not, and
• each of the resin impregnation sensors includes a positive electrode and a negative electrode which extend along the longitudinal direction of the corresponding one of the jigs, the positive electrode and the negative electrode being disposed in parallel;
• and
• mold release members, each of the mold release members comprises a facing surface that faces the corresponding one of the jigs, wherein:
• each of the mold release members is disposed on an opposite side to a facing surface of each of the resin impregnation sensors, and
• each of the mold release members covers the positive electrode and the negative electrode to prevent the resin from coming into contact with the positive electrode and the negative electrode.