Assembly inspection method and associated device

A method for inspecting the quality of an alignment of at least a first element and a second element of an assembly by a double-access fastening means, comprising the following tasks:

• a task of measuring a first parameter with a first measuring means, said first parameter being selected from a movement parameter of at least a first part of the double-access fastening means, an assembly force parameter or a torque;
• a task of measuring a second parameter with a second measuring means, said second parameter being selected from the movement parameter of at least the first part of the double-access fastening means, the assembly force parameter and the torque, and the second parameter being different from the first parameter;
• a task of calculating a value of a first derivative of a function representing a change in the second parameter relative to the first parameter by suitable information processing means;
• a task of analyzing the value of the first derivative calculated by the suitable information processing means to check the alignment between at least the first element and the second element to be assembled;
• wherein the analysis task comprises detecting of a change in behavior of the assembly shown by slope variations of the function linking the two parameters in question, the function representing the change in the second parameter relative to the first parameter comprising an alignment phase in which the slope of the curve is then close to zero, a tightening phase, and an optional intermediate phase relating to the presence of a possible residual gap between the first element and the second element of the assembly.