Method and system for accurately and rapidly measuring length of deformed steel bar weight deviation test sample

The invention provides a method and system for accurately and rapidly measuring the length of a deformed steel bar weight deviation inspection sample, and the method comprises the steps: obtaining the basic attribute information of a to-be-detected target, and enabling the basic attribute information to comprise the theoretical weight of the to-be-detected target; acquiring the length and the actual weight of the to-be-detected target; performing meter weight back calculation based on the length and the actual weight to obtain the meter weight of the to-be-detected target; according to the weight per meter and the theoretical weight, determining the weight per meter with the minimum difference with the theoretical weight as the actual theoretical weight of the to-be-detected target; and determining the weight deviation of the to-be-detected target based on the actual theoretical weight. Length correction is carried out in a volume compensation mode, the specification of a to-be-detected target does not need t