Justerbar hållare för ultraljudssensor : För oförstörande kvalitetssäkring av svetsfogar

Sammanfattning: In the manufacturing industry, product quality assurance is important to ensure customer safety and product quality. The thesis is based on problems identified with calibration of ultrasonic sensors used in quality assurance of rear shafts for trucks and buses. The ultrasonic sensors operate underwater at a frequency above 20 kHz, utilizing the angle of refraction to analyse the bottom part of weld seams for possible defects. The purpose of the thesis has been to assist Syntronic in designing and evaluating different mechanical solutions for an improved sensor mount, with the aim of increasing repeatability and reducing calibration time. The report follows a product development process, where theory of concept generation methods has been applied. Establishment of product requirements through unstructured interviews were made, where qualitative data was collected. Concept generation was used in respect to the product requirements, followed by detailed design of products intended to solve the identified problems. Furthermore, the concepts were analysed using the SolidWorks FEM tool and compared to each other in a concept selection matrix. The result of the investigation is a product that better meets the product requirements compared to the existing product. Physical testing remains, where an initial prototype is developed and implemented in a test rig, gathering additional data. Furthermore, the report provides a foundation for further product development in the discussion chapter.