Design and optimisation of NiTi pressure gauge

Hunek, Martin; Pliva, Zdenek

doi:10.1109/ecmsm.2017.7945902

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Hunek et al showed a design of a pressure sensor based on a NiTi wire [4]. Another approach is to implement pressure sensors based on SMA thin films.…”

Section: Shape Memory Alloy Thin Film Sensorsmentioning

confidence: 99%

Smart Pressure Film Sensor for Machine Tool Optimization and Characterization of the Dynamic Pressure Field on Machine Surfaces

Erben

Geist

Voigt

et al. 2023

Lecture Notes in Production Engineering

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Knowledge of thermal interactions with the environment is essential for improving the performance of machine tools. Therefore, it is necessary to detect and quantify the convective heat flows at machine tool surfaces, that occur in the workspace as a result of cutting fluid use or outside the machine due to active air flow. Thin-film sensors made of shape memory alloys with integrated small temperature sensors are suitable for detecting very fine pressure differences and can be used to estimate convective heat transfer. By measuring the pressure differences, the dynamic pressure field at the surface can be determined. Since the pressure field correlates with the flow field, conclusions can be drawn about the flow velocity. This leads to more profound and extended possibilities to match flow fields from CFD simulations with measured data. At the same time, the surface temperature is also recorded by this sensor. Reference measurements of the temperature in the free flow are used to characterize the heat transfer. By knowing the pressures, temperatures and the correlating flow velocity near the wall, the heat transfer coefficient can be determined. Against this background, this paper demonstrates the behavior of shape memory alloys as fluid pressure sensors and addresses the development of such sensors for machine tools. For this purpose, sensor units are to be developed that can be placed as a sensor network (composite of several sensors on one surface) inside and outside the workspace.

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“…Hunek et al showed a design of a pressure sensor based on a NiTi wire [4]. Another approach is to implement pressure sensors based on SMA thin films.…”

Section: Shape Memory Alloy Thin Film Sensorsmentioning

confidence: 99%

Smart Pressure Film Sensor for Machine Tool Optimization and Characterization of the Dynamic Pressure Field on Machine Surfaces

Erben

Geist

Voigt

et al. 2023

Lecture Notes in Production Engineering

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Experimental Investigation of the Loading Conditions Impact on the Thin NiTi Wire Resistance Change during Cyclic Stretching

Hartwich,

Duda,

Sławski

et al. 2024

Materials

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This paper presents the results of an experimental study designed to evaluate the effect of repeated stretching cycles on the electrical resistance change in a NiTi alloy wire. In particular, tests were carried out to determine the effect of the type of loading on resistance change in the investigated wires. Wires with a diameter of 100 μm were used in the research. The experiment was carried out on a dedicated test stand designed for this purpose. During the test, the samples were subjected to 40 identical tensile cycles. The electrical resistance, sample elongation, and tensile force during successive stretching cycles were measured. The conducted research demonstrated the impact of elongation and reorientation of the structure on the resistance change in NiTi alloy thin wires. The research included a comparison of the effect of two different types of loading on the electrical resistance change in the sample. During cyclic stretching of a NiTi alloy sample with constant displacement, a decrease in electrical resistance was observed after each successive stretching cycle. Alternatively, when stretching with a constant force, the value of electrical resistance increased. In both types of loads, the greatest change in resistance value was observed at the initial cycles.

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Design and optimisation of NiTi pressure gauge

Cited by 2 publications

References 3 publications

Smart Pressure Film Sensor for Machine Tool Optimization and Characterization of the Dynamic Pressure Field on Machine Surfaces

Smart Pressure Film Sensor for Machine Tool Optimization and Characterization of the Dynamic Pressure Field on Machine Surfaces

Experimental Investigation of the Loading Conditions Impact on the Thin NiTi Wire Resistance Change during Cyclic Stretching

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