Razvoj sistema za posredno merjenje tlaka v 3D tiskanih hidravličnih ventilih z uporabo merilnih lističev

Kraner, Marko (author), Majdič, Franc (mentor), Mole, Nikolaj (comentor)

V današnjem času se intenzivno uvaja dodajalno tehnologijo na vseh področjih življenja, tudi v hidravliki. 3D natisnjeni ventili so manjši in lažji v primerjavi s konvencionalno izdelanimi. Sodobni trendi strmijo k integraciji senzorike s posamezne komponente. V diplomski nalogi je razvit sistem za posredno merjenje tlaka z merjenjem deformacije 3D-tiskane cevke iz jekla 316L. Z nateznimi preizkusi so bile določene mehanske lastnosti LPBF-tiskanega materiala, uporabljene pri numerični analizi z metodo končnih elementov. Na podlagi analiz je bila določena geometrija merilnega mesta. Izdelan in preizkušen je bil merilni sistem z uporovnim merilnim lističem, Wheatstonovim mostičem in instrumentacijskim ojačevalnikom. Sistem je omogočil zaznavanje spremembe tlaka, pri čemer je bila ugotovljena potreba po temperaturni kompenzaciji.

• Language: Slovenian
• Keywords: posredno merjenje tlaka, dodajalna izdelava, metoda končnih elementov, merilni lističi, transverzalna izotropija, natezni preizkusi, hidravlično preizkuševališče
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Kraner]
• Year: 2026
• Number of pages: XX, 54 str.
• PID: 20.500.12556/RUL-186581
• UDC: 532.11:519.61:621.7.08(043.2)
• COBISS.SI-ID: 289923075
• Publication date in RUL: 03.09.2026

Secondary language

• Language: English
• Title: Development of an indirect pressure measurement system for 3D-printed hydraulic valves using strain gauges

Abstract

Additive manufacturing is increasingly being adopted across many areas of industry and everyday life, including hydraulic systems. Compared with conventionally manufactured valves, 3D-printed valves can be smaller and lighter. Current trends aim to integrate sensors directly into individual components. This thesis presents a system for indirect pressure measurement based on the strain of a 3D-printed 316L stainless steel tube. The mechanical properties of the LPBF-manufactured material were determined by tensile testing and used in finite element analysis to define the geometry of the measurement region. A measurement system using a resistive strain gauge, Wheatstone bridge, and instrumentation amplifier was developed and tested. The system detected pressure changes, while the results indicated the need for temperature compensation.

• Keywords: indirect pressure measurement, additive manufacturing, finite element method, strain gauges, transverse isotropy, tensile testing, hydraulic test bench