• 한국정밀공학회지
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• 제9권1호
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• pp.29-33
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• 1992

A non-contact torque sensor was developed using amorphous alloy. The change of maixmum magnetic induction of C0-based amorphous alloy under the tensile and compressive stress was proportional to applied torque. For the construction of the torque sensor, a glass fiber reinforced-epoxy rod was used as shaft. The amorphous strips were attached on the epoxy shaft in the direction of $+45^{\circ}$and $-45^{\circ}$. The magnetizing coil and 2 sensing coil was installed. The static and dynamic test was carried out. The linearity and sensor hysteresis of the torque sensor was less than 1%.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.53.3-53
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• 2001

This paper deals with the development of a shape inspection system of the Light Guide Panel(LGP), and the study for the performance of the system. The conventional contact sensing methods have been used to inspect the shape. However the contact-sensing methods have some problems. The contact between a tip of the sensor and the surface of objects make a sensor tip abraded and generate a defect on the surface of objects. In this paper, we employed the Non-Contact Optical Sensor[1] to measure the shape inspection system of LGPs, The Sensor composed of Hologram laser[3] unit used for CD Optical Pickup[2] is low cost and has a good performance to measure a transparent objects. From the results of experiments for LGP shape inspection ...

• 전기학회논문지
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• 제58권10호
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• pp.2071-2078
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• 2009

In this paper, we proposed a non-contact respiration measurement system with ultrasonic proximity sensor. Ultrasonic proximity sensor approach of respiration measurement which respiration signatures and rates can be derived in real-time for long-term monitoring is presented. 240 kHz ultrasonic sensor has been applied for the proposed measurement system. The time of flight of sound wave between the transmitted signal and received signal have been used for a respiration measurement from abdominal area. Respiration rates measured with the ultrasonic proximity sensor were compared with those measured with standard techniques on 5 human subjects. Accurate measurement of respiration rate is shown from the 50 cm measurement distance. The data from the method comparison study is used to confirm the performance of the proposed measurement system. The current version of respiratory rate detection system using ultrasonic can successfully measure respiration rate. The proposed measurement method could be used for monitoring unconscious persons from a relatively close range, avoiding the need to apply electrodes or other sensors in the correct position and to wire the subject to the monitor. Monitoring respiration using ultrasonic sensor offers a promising possibility of non-contact measurement of respiration rates. Especially, this technology offers a potentially inexpensive implementation that could extend applications to consumer home-healthcare and mobile-healthcare products. Further advances in the sensor design, system design and signal processing can increase the range of the measurement and quality of the rate-finding for broadening the potential application areas of this technology.

• 한국정밀공학회지
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• 제18권9호
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• pp.61-70
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• 2001

This paper introduces a new digitization method with sensor fusion for shape measurement in reverse engineering. Digitization can be classified into contact and non-contact type according to the measurement devices. Important thing in digitization is speed and accuracy. The former is excellent in speed and the latter is good for accuracy. Sensor fusion in digitization intends to incorporate the merits of both types so that the system can be automatized. Firstly, non-contact sensor with vision system acquires coarse 3D point data rapidly. This process is needed to identify and loco]ice the object located at unknown position on the table. Secondly, accurate 3D point data can be automatically obtained using scanning probe based on the previously measured coarse 3D point data. In the research, a great number of measuring points of equi-distance were instructed along the line acquired by the vision system. Finally, the digitized 3D point data are approximated to the rational B-spline surface equation, and the free-formed surface information can be transferred to a commercial CAD/CAM system via IGES translation in order to machine the modeled geometric shape.

• 비파괴검사학회지
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• 제32권2호
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• pp.192-197
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• 2012

본 연구는 금속의 표면균열 검출을 위해 마이크로파를 이용한 비파괴측정에 관한 것이다. X-band 대역인 11 GHz 주파수와 종단 개방 동축선 센서를 이용하여 금속 표면에 주사된 마이크로파의 반사계수를 측정하여 균열 여부 및 균열의 폭을 판단하게 된다. 또한 반사계수의 최대값과 최소값의 차이를 매개변수(K)로 하여 균열의 깊이를 평가하였는데 K값과 균열의 깊이는 선형 관계를 보였다. 따라서 본 연구는 종단 개방 동축선 센서를 이용한 비접촉식 금속표면균열 평가의 가능성을 보여주었다.

• 한국정보통신학회논문지
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• 제19권9호
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• pp.2087-2092
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• 2015

산업이 발전함에 따라 제조업 및 서비스 제품 등 다양한 분야에 열전달 장치 및 열전달 시스템이 활용되고 있다. 열전달 시스템의 자동화 및 모니터링 시스템을 통하여 환경을 관리하기 위해서는 온도 측정이 필요한 대상물의 직접적인 온도 및 측정 대상물의 주위 온도에 대한 계측이 필수요소라 할 수 있다. 특히, 이러한 온도 측정에 관한 두 가지 요소에 대하여 본 논문에서는 비접촉온도센서를 활용하여 온도 계측이 필요한 대상물에 센스를 직접 접촉하지 않고 대상물의 표면 온도를 계측할 수 있는 시스템과 대상물 주위 온도를 계측할 수 있는 모듈을 소형 MCU(microcontroller unit) 기반으로 설계하여 계측된 온도 데이터를 USN(Ubiquitous Sensor Network)기반의 지그비(ZigBee) 통신을 활용하여 온도 모니터링 시스템을 제시하고자 한다. 본 논문에서는 대상물의 온도와 주위 온도에 관한 정보를 계측하기 위하여 비접촉온도센서를 활용하여 대상물의 표면 온도 및 주위 온도를 계측할 수 있는 펌웨어 기반의 시스템을 설계하였다. 또한, 계측된 온도 정보 데이터를 지그비 통신을 기반으로 원격으로 온도 데이터를 모니터링 할 수 있는 시스템을 제시하고자 한다.

• 전력전자학회논문지
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• 제15권5호
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• pp.381-386
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• 2010

본 논문에서는 자동차의 전장용 자기신호를 측정할 수 있는 비접촉식 측정장치를 개발하였다. 자동차에는 솔레노이드, 릴레이, 모터, 인젝터 등 많은 자기적 에너지로 동작하는 액츄에이터들이 장착되어있다. 그러나 이 장치들은 커넥터로 모두 연결되어 있으므로 전선의 피복을 벗기지 않고는 동작여부를 확인하기가 매우 어렵다. 따라서 본 논문에서는 홀효과를 이용한 센서를 사용하여 비접촉으로 액츄에이터의 작동 여부를 판단할 수 있는 장치를 개발하였다. 개발된 장치는 비접촉식이므로 액츄에이터들이 동작상태에 있을 때 전선의 피복을 벗기지 않고도 작동 여부 판단을 쉽게 할 수 있는 장점을 가진다. 시뮬레이션과 실험을 통하여 개발된 장치의 성능과 유용성을 보여주었다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 추계학술대회논문집
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• pp.675-680
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• 2008

This paper proposes a way to measure the displacement of a multi-point by using a pattern recognition from video signal. Generally in measuring displacement, gab sensor, which is a displacement sensor, is used. However, it is difficult to measure displacement by using a common sensor in places where it is unsuitable to attach a sensor, such as high-temperature areas or radioactive places. In this kind of places, non-contact methods should be used to measure displacement and in this study, images of CCD camera were used. When displacement is measure by using camera images, it is possible to measure displacement with a non-contact method. It is simple to install and multi-point displacement measuring device so that it is advantageous to solve problems of spatial constraints.

• 한국자기학회지
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• 제1권2호
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• pp.89-93
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• 1991

회전축에 부착된 두 코아가 회전축의 토오크에 의하여 인장응력과 압축응력을 받게하여 두 코아의 최대자기유도 차이를 피측정량으로 하는 새로운 비접촉 토오크 센서를 제작하였다. 제작된 토오 크센서는 선형도가 1% 정도였으며 과도현상적인 토오크를 자화주파수와 동일한 10 kHz 의 샘플링주파수 로 측정 가능하게 하였다.

• 한국소음진동공학회논문집
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• 제18권12호
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• pp.1256-1261
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• 2008

This paper proposes a way to measure the displacement of a multi-point by using a pattern recognition from video signal. Generally in measuring displacement, gab sensor, which is a displacement sensor, is used. However, it is difficult to measure displacement by using a common sensor in places where it is unsuitable to attach a sensor, such as high-temperature areas or radioactive places. In this kind of places, non-contact methods should be used to measure displacement and in this study, images of CCD camera were used. When multi-point is measure by using a pattern recognition, it is possible to measure displacement with a non-contact method. It is simple to install and multi-point displacement measuring device so that it is advantageous to solve problems of spatial constraints.