초소형 공작기계 적용을 고려한 광학식 3축 공구원점 센서 모델링 및 실험에 관한 연구 (Study on Modeling and Experiment of Optical Three Axis Tool-Origin Sensor for Applications of Micro Machine-Tools)

서지정보

· 발행기관 : 한국정밀공학회
· 수록지 정보 : 한국정밀공학회지 / 26권 / 6호 / 68 ~ 73페이지
· 저자명 : 신우철, 노승국, 박종권, 노명규, 이현화

초록

One of the traditional optical methods to monitor a tool is a CCD sensor-based vision system
which captures an aspect of the tool in real time. In the case using the CCD sensor, specific lensmodules
are necessary to monitor the tool with higher resolution than its pixel size, and a microprocessor
is required to attain desired data from captured images. Thus theses additional devices
make the entire measurement system complex. Another method is to use a pair of an optical
source and a detector per measuring axis. Since the method is based on the intensity modulation,
the structure of the measurement system is simper than the CCD sensor-based vision system.
However, in the case measuring the three dimensional position of the tool, it is difficult to apply to
micro machine-tools because there may not be space to integrate three pairs of an optical source
and a detector. In this paper, in order to develop a tool-origin measurement system which is
employed in micro machine-tools, the improved method to measure a tool origin in x, y and z axes
is introduced. The method is based on the intensity modulation and employs one pair of an optical
source radiating divergent beams and a quadrant photodiode to detect a three dimensional
position of the tool. This paper presents the measurement models of the proposed tool-origin
sensor. The models were verified experimentally. The verification results show that the proposed
method is possible and the induced models are available for design.

영어초록

One of the traditional optical methods to monitor a tool is a CCD sensor-based vision system
which captures an aspect of the tool in real time. In the case using the CCD sensor, specific lensmodules
are necessary to monitor the tool with higher resolution than its pixel size, and a microprocessor
is required to attain desired data from captured images. Thus theses additional devices
make the entire measurement system complex. Another method is to use a pair of an optical
source and a detector per measuring axis. Since the method is based on the intensity modulation,
the structure of the measurement system is simper than the CCD sensor-based vision system.
However, in the case measuring the three dimensional position of the tool, it is difficult to apply to
micro machine-tools because there may not be space to integrate three pairs of an optical source
and a detector. In this paper, in order to develop a tool-origin measurement system which is
employed in micro machine-tools, the improved method to measure a tool origin in x, y and z axes
is introduced. The method is based on the intensity modulation and employs one pair of an optical
source radiating divergent beams and a quadrant photodiode to detect a three dimensional
position of the tool. This paper presents the measurement models of the proposed tool-origin
sensor. The models were verified experimentally. The verification results show that the proposed
method is possible and the induced models are available for design.

참고자료

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