System and method for automatically checking seat dimension accuracy and computer-readable recording medium recorded with program for the same

A method for automatically checking seat dimension accuracy for a vehicle, the method comprising:

• storing, in a memory unit, seat design data at a time of designing an actually produced seat and seat scan data obtained by scanning the actually produced seat via a scanner;
• determining, by a controller connected to the memory unit, when the actually produced seat has been produced to match predesigned dimensions using the seat design data and the seat scan data stored in the memory unit and converting the seat design data and the seat scan data into a three-dimensional seat shape and automatically measuring reference points and dimension values while superimposed on each other to compare difference values therebetween;
• and
• outputting, by a display unit connected to the controller, a result of determination by the controller in a predetermined form,
• wherein the determining is performed in an order of:
• loading, by an input loading part, the seat design data and the seat scan data stored in the memory unit;
• performing seat matching by making the seat design data and the seat scan data overlap each other in order for a seat matching part to check when the seat design data and the seat scan data coincide with each other;
• setting, by a measurement part, a seat section of a target of checking in a state in which a seat model in accordance with the seat scan data and a seat model in accordance with the seat design data match each other, and extracting reference points included in the seat section;
• determining, by the measurement part, the reference points for a section cutting plane, and measuring dimension values of the seat design data and the seat scan data on the section cutting plane at a same time;
• and
• performing, by an analysis part, dimension checking by analyzing, through comparison, a dimension difference between the seat design data and the seat scan data, and making a pass decision for the seat dimension accuracy upon determining that the dimension difference is within an error range and making a fail decision for the seat dimension accuracy upon determining that the dimension difference deviates from the error range as a result of the comparison, and
• wherein the storing includes:
• transmitting the seat design data from an external device to the memory unit through a communication part connecting the storage unit and the external device and storing the seat design data in the memory unit, and
• transmitting the seat scan data obtained by scanning the actually produced seat through the scanner to the storage unit through the communication part and storing the seat scan data in the memory unit, and
• wherein the seat matching is performed in an order of:
• dividing the seat model in accordance with the seat scan data into a seat cushion and a seat back;
• and
• analogizing a rotation axis of the divided seat after the seat model is divided into the seat cushion and the seat back in accordance with the seat scan data;
• wherein the analogizing includes:
• determining a transformation matrix for respectively aligning the seat cushion and the seat back separated from each other using an iterative closest point (ICP) method which is a kind of 3D object matching algorithm;
• extracting only a rotation matrix of the seat back from the determined transformation matrix;
• and
• determining an eigenvector from the rotation matrix of the extracted seat back, and defining an axis that passes through a position of the eigenvector and is in parallel to a side-direction axis (Y axis) as a rotation axis.