Title:
STRAIN SENSOR-BASED WORKPIECE PROCESSING MONITORING METHOD AND SYSTEM FOR SAME
Document Type and Number:
WIPO Patent Application WO/2022/004929
Kind Code:
A1
Abstract:
Disclosed are a strain sensor-based workpiece processing monitoring method and a system for same. In a state in which one or more strain sensors connected to a resistance measurement unit are attached to a workpiece, while processing the workpiece using a machine tool, resistance values of the one or more strain sensors are measured using the resistance measurement unit. A power spectrum in a frequency band is obtained by performing a Fourier transform on resistance value signals measured over time, and a power peak in the power spectrum is identified and outputted as the magnitude of vibration occurring when processing the workpiece. The strain sensor connected to the resistance measurement unit is attached to a stamper attached to a plastic deformation machine, and while plastic deformation is performed by pressing a workpiece placed on top of a die by the stamper of the plastic deformation machine, a resistance value of the strain sensor is measured using the resistance measurement unit. The magnitude of strain corresponding to the measured resistance value is calculated, and a plastic deformation force corresponding to the calculated magnitude of strain is calculated. By attaching the strain sensors directly to the workpiece, the state of plastic deformation and/or milling processes can be monitored with high precision at low cost.
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Inventors:
AHN SUNG HOON (KR)
MIN SOO HONG (KR)
LEE GIL YONG (KR)
LEE TAE HUN (DE)
LEE SANG WOOK (DE)
ZONTAR DANIEL (DE)
MIN SOO HONG (KR)
LEE GIL YONG (KR)
LEE TAE HUN (DE)
LEE SANG WOOK (DE)
ZONTAR DANIEL (DE)
Application Number:
PCT/KR2020/009091
Publication Date:
January 06, 2022
Filing Date:
July 10, 2020
Export Citation:
Assignee:
SEOUL NAT UNIV R&DB FOUNDATION (KR)
FRAUNHOFER GES FORSCHUNG (DE)
FRAUNHOFER GES FORSCHUNG (DE)
International Classes:
B23Q17/09; B23Q17/12; G01B7/16
Foreign References:
| JP2014184505A | 2014-10-02 | |||
| US20110226066A1 | 2011-09-22 | |||
| JP5793200B2 | 2015-10-14 | |||
| US20070068258A1 | 2007-03-29 | |||
| KR101165231B1 | 2012-07-16 | |||
| KR101814793B1 | 2018-01-04 | |||
| KR20150074623A | 2015-07-02 |
Other References:
MIN SOO-HONG, LEE TAE HUN, LEE GIL-YONG, ZONTAR DANIEL, BRECHER CHRISTIAN, AHN SUNG-HOON: "Directly Printed Low-Cost Nanoparticle Sensor for Vibration Measurement during Milling Process", MATERIALS, vol. 13, no. 13, 29 June 2020 (2020-06-29), XP055884995, DOI: 10.3390/ma13132920
See also references of EP 4177006A4
See also references of EP 4177006A4
Attorney, Agent or Firm:
PARK, Young-woo (KR)
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