| 摘要 |
A system for monitoring installation of fasteners in an assembly process utilizes printed symbology, such as a barcode, to uniquely identify the location at which a fastener will be installed. An installation tool includes torque measuring capability and further includes a reader capable of reading the printed symbology. The output of the reader and the torque measurement values are provided to a computer communicatively coupled thereto. The computer contains stored fastener torque signatures that correspond to each fastener. Based on the printed symbology identification, the computer can determine the type of fastener to be installed at that precise location. During installation, torque measurements from the installation tool are compared against the fastener torque signature to determine whether the proper fastener was installed at that location and, additionally, whether the fastener was properly installed. Based on the torque measurement and rotational position of the fastener, the system can identify a number of different types of defects, such as improper selection of the fastener; thread defects, cross threading, and the like.
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