3: Schematic closed-loop

Closed loop process control


This work presents a laser based bridge balancing method for strain sensor circuits which are applied directly on component surfaces by means of thin film deposition and laser patterning. The balancing process is integrated in the patterning process and consists of iterative cycles of laser scanning and bridge measurement operations until a balanced bridge circuit is generated. It is shown that a balanced bridge circuit on the surface of a non-planar surface can be generated within few scan cycles, and thus, allows for short processing times and high-throughput manufacturing of integrated thin film strain sensors on the surface of mechanical components.

Keywords

References

    • High-temperature thin-film strain gauges

    • Sens Act A, 37–38 (1993), pp. 328–332

    • Thin-film thermocouples and strain-gauge technologies for engine applications

    • Sens Act A, 65 (1998), pp. 187–193

    • Thin film sensors for surface measurements. Proceedings of the 19th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF) Ohio USA (2001), pp. 196–203

    • Laser patterning of thin films on 3D surfaces

    • CIRP Ann Manuf Technol, 61 (2012), pp. 1–215



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