TY - GEN
T1 - Study of a capacitive sensing technology for the measurement of perpendicularity of narrow-deep slot-walls in precision molds
AU - Chen, S. T.
AU - Lin, S. M.
PY - 2014
Y1 - 2014
N2 - This paper presents a novel approach to slot-wall measurement in precision molds. The method measures the perpendicularity of slot-walls in the hard to measure very narrow and deep slots in precision molds. A tabletop hybrid measurement centre combining micro-wire electrical discharge machining (w-EDM) with automatic optical inspection (AOI), and capacitive sensing (CS) is developed. Microprobes are machined using micro w-EDM on the measurement centre. AOI facilitates the designed machine vision system to acquire images from the mold's features. These images are binarized for recognition, which helps the microprobe speedy position into the contour. Capacitive sensing, by which a signal with very low voltage and high frequency is employed between the probe and slot-wall, is conducted for precise detection of perpendicularity. A four-step probe feed approach is proposed for improved measurement accuracy. The technical feasibility of capacitive sensing was experimentally confirmed.
AB - This paper presents a novel approach to slot-wall measurement in precision molds. The method measures the perpendicularity of slot-walls in the hard to measure very narrow and deep slots in precision molds. A tabletop hybrid measurement centre combining micro-wire electrical discharge machining (w-EDM) with automatic optical inspection (AOI), and capacitive sensing (CS) is developed. Microprobes are machined using micro w-EDM on the measurement centre. AOI facilitates the designed machine vision system to acquire images from the mold's features. These images are binarized for recognition, which helps the microprobe speedy position into the contour. Capacitive sensing, by which a signal with very low voltage and high frequency is employed between the probe and slot-wall, is conducted for precise detection of perpendicularity. A four-step probe feed approach is proposed for improved measurement accuracy. The technical feasibility of capacitive sensing was experimentally confirmed.
KW - Automatic optical inspection (AOI)
KW - Capacitive sensing (CS)
KW - Deep
KW - Micro wire electrical discharge machining (Micro w-EDM)
KW - Narrow-deep slot-wall
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M3 - Conference contribution
AN - SCOPUS:84923126302
T3 - Conference Proceedings - 14th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2014
SP - 317
EP - 320
BT - Conference Proceedings - 14th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2014
A2 - Leach, R.
PB - euspen
T2 - 14th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2014
Y2 - 2 June 2014 through 6 June 2014
ER -