In this paper, the possibilities of detection and measurement of fatigue crack length in welded joints made of steel of duplex type, have been presented. In the investigations there has been used an original research system FatigueVIEW employing advanced optoelectronic techniques and numerical methods of image analysis. The proposed approach enables analysis of the fatigue crack growth during fatigue tests and after their finishing in off-line mode.

The processes of technology development and transfer are affected by numerous barriers that hinder the efficient implementation of innovations into the economy. The paper is focused on a selected type of barriers of a technical character that are observed on the operational (intra-organisational) and tactical (inter-organisational) levels. The main objective of the paper is to identify and analyse a technical barrier related to the changing technical requirements in the course of innovation development. Against the state of the art analysis, the main technology transfer barrier discussed in the paper is illustrated with case studies presenting real barriers encountered in practice in a selected domain of optomechatronics and the successful limitation of their impact on innovation development and implementation processes. The barriers were identified by the authors in their many-year involvement in innovation development and the implementation of innovative research results in economic practice in the field of machine construction and maintenance carried out by an R&D organisation.

In the paper method of displacement analysis in the cracking zone based on digital image correlation and advanced multi-processor graphic cards procedures was presented. The basic assumption for the discussed displacement and strain measurement method under time variable loads was obtaining high measurement sensitivity by simultaneously minimizing the measurement time consumption. The developed digital procedures for correlation of images has been used for an example of displacement analysis in the crack propagation testing in airplane riveted joints.

The article presents a dual-camera vision system for fatigue monitoring composed of a vision unit, a camera positioning set and a computer unit. Vision modules are mounted onto the 4DOF positioning sets, which allows for an easy determination of the position of the camera in relation to the sample. The application of motorized measurement lenses with changeable configuration, thanks to the alteration of the distance of observation and the vision angle, enables the adaptation of the system to different scales of observation of the fatigue processes in the specimen surface. Automatic focus setting is realised with the use of the implemented algorithm. The software developed allows for the analysis of fatigue fracture for two 2D images or the 3D stereovision image.