• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 추계학술대회
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• pp.131-136
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• 2003

Five expensive sensors are necessary to control a magnetic bearing system. The sensor price rate of magnetic bearing system is high. So it is necessary that cheap and good sensor is developed. The optical fiber displacement sensor is adaptive to satisfy this condition. We can design magnetically suspended spindle based on static characteristic of optical fiber displacement sensor developed. The controller can be designed by decoupled feedback PD. Therefore, it is simpler than any other controller comparatively.

• 에너지공학
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• 제13권3호
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• pp.205-213
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• 2004

본 연구에서는 고가인 고속도 CCD카메라가 아닌 비교적 간단한 광파이버 시스템을 이용한 자려진동연소 발생에 관한 검출과, 진동연소가 발생하기 전에 이를 미리 예견할 수 있는 통계학적 수법에 관해 조사를 하였다. 먼저 자려진동연소의 발생시에 사용될 수 있는 광파이버의 유용성이 검증되었다. 광파이버에 의해 검출되어진 OH 라디칼 자발광 강도는 고속도 CCD카메라에 의해 얻어진 값과 강한 자려진동연소가 발생할 때에 거의 일치를 하였다. 자려진동연소가 발생하면 시스템과 연소기기에 손상을 가하게 된다. 이러한 피해가 발생하기 전에 자려진동연소의 발생 징후를 미리 포착하려는 시도를 하였다. 이를 위해 압력과 OH라디칼 자발광과 같은 화염에서의 변동성분께 대한 통계학적 처리를 이용하여 자려진동연소의 발생을 예견할 수 있는 독특한 수법에 관해 조사를 하였다.

• NEWSLETTER 전기공업
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• 97-23호통권192호
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• pp.16-23
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• 1997

• 광산업정보
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• 통권29호
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• pp.52-63
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• 2005

• NEWSLETTER 전기공업
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• 98-8호통권201호
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• pp.6-27
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• 1998

• 한국생산제조학회지
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• 제14권2호
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• pp.7-13
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• 2005

• 정보와 통신
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• 제9권7호
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• pp.69-77
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• 1992

• NEWSLETTER 전기공업
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• 97-2호통권171호
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• pp.29-45
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• 1997

• Journal of Advanced Marine Engineering and Technology
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• 제25권1호
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• pp.191-198
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• 2001

In order to comprise a basic closed-loop control system for hydraulic systems it is necessary to detect the piston rod stroke of a hydraulic cylinder. There are many conventional type sensors which can detect the displacement of cylinders. However, they cannot reveal the original performance normally or they cannot be applied at all where the operating circumstance of cylinders is beyond specifications of sensors. Especially, for the purpose of detecting the strokes of cylinders mounted on heavy equipments, a special exclusive sensor must be used because the operating circumstances of heavy equipments are so severe that general purpose sensors cannot endure such circumstance as shock and a residual vibration induced by rough works. In this paper, an exclusive method for detecting the piston rod stroke for heavy equipments is suggested, which adopts a remote detecting technique using optical fiber sensors. Several experiments using the prototype are executed for verifying the effectiveness of the suggested method and the possibility of the accurate detection of stroke.

• 한국공작기계학회논문집
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• 제12권1호
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• pp.65-71
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• 2003

In a high speed spindle system it is very important to monitor the state of rotating rotor. Particularly in active control spindle system the position sensor must provide feedback to the control system on the exact position of the rotor. In order to monitor the state of a high speed spindle exactly, high accuracy and wide frequency bandwidth of sensors are important. The focus in this paper is to make a fiber optic sensor for monitoring rotor of magnetic bearing, to design the circuit for detecting optical signal, and to evaluation static and dynamic characteristics of fiber optic sensor.