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AssigneesSeoul National University R&Db Foundation, Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsSung Hoon Ahn, Soohong Min, Gilyong Lee, Tae Hun Lee, Sang Wook Lee, Daniel Zontar
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Strain sensors are attached to a workpiece, and resistance values of the strain sensors are measured with time while cutting the workpiece with a milling cutting machine. A power spectrum in a frequency domain is obtained by Fourier-transforming the resistance values measured with time. A power peak is found in the power spectrum to be outputted as a magnitude of vibration occurring during machining the workpiece. By attaching a strain sensor to a stamper of a plastic working machine, a resistance value of the strain sensor is measured while pressing a workpiece on a die with the stamper. A magnitude of the strain corresponding to the measured resistance value is used to obtain a corresponding plastic working force. By attaching the strain sensor directly to the workpiece, it is possible to monitor the state of the plastic working and/or cutting process of the workpiece with high precision at low cost.
A system for monitoring workpiece processing based on strain sensor, comprising:
A method of monitoring workpiece processing based on strain sensor, including:
A method of monitoring workpiece processing based on a strain sensor, including:
A method of using a strain sensor having a sensitivity that a gauge factor is 10 or more and a vibration measurement rate is 100 Hz or more, to measure a magnitude of vibration generated when a workpiece is machined with a machine by attaching the strain sensor.
Dependencies are inferred from the claim text.