APPLICATION OF PHOTOGRAMMETRY IN REVERSE ENGINEERING OF MACHINE-BUILDING FACILITIES

To recreate an object in the form of a virtual model based on an existing physical detail, the paper proposes to use the Autodesk ReCap Photo cloud service. Using this service, it is possible to create virtual three-dimensional models by laser scanning a real object or using a digital camera and subsequent digital reproduction of this object in digital space. However, the widespread use of laser scanners and software is very limited due to their high cost. The paper proposes a cheaper, more accessible and no less accurate method that is easy to apply in practice - the method of digital reverse engineering photogrammetry. The method is based on creating a three-dimensional model from two-dimensional photographs using the proposed software. With its help, the user uploads a set of photos to Autodesk's servers and receives a triangulated model of the object with all real dimensions and high quality textures. The data obtained was subsequently imported for further processing into another program of this family, the Autodesk Inventor package. The Autodesk Inventor package has a user-friendly interface and a large set of tools for modeling engineering products. To demonstrate the scale and level of sophistication of ReCap Photo, we demonstrate the options included in the application: first of all, the application supports almost all laser scan file formats. In addition, point clouds can be edited arbitrarily - deleted, copied, highlighted, or even added survey points. As a result, it is possible not only to create technical documentation, but also to reconstruct objects with millimeter accuracy. Visualization and design make it possible to eliminate possible errors. It has been demonstrated that such models can be used to design and obtain working documentation. Due to the identity of the spatial virtual model and the real physical object, the accuracy and quality of design is improved. Thus, it is clearly shown that the presented methodology significantly reduces labor intensity and increases efficiency.