• 대한기계학회논문집A
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• 제40권2호
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• pp.133-138
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• 2016

기존에는 로봇 말단에 6축 힘/토크 센서를 부착하여 로봇의 힘제어 및 충돌감지를 수행하였지만, 이 방법은 매우 고가이고, 로봇의 몸체에서 발생한 충돌을 감지할 수 없었다. 이의 대안으로 각 관절에 관절 토크센서를 장착하였으나, 토크 측정 시에 발생하는 다양한 오차로 인하여 실제 적용에 한계가 있었다. 이러한 문제를 해결하고자 본 연구에서는 정확한 토크 측정을 위한 관절 토크센서 및 이를 포함하는 관절모듈을 개발하였다. 제안된 관절모듈은 로봇에 인가되는 모멘트 부하를 지지하고, 조립 시 발생하는 응력을 감소시키기 위하여 토크센서에 디스크형 커플링을 첨가하여 원하는 회전토크만을 효과적으로 측정할 수 있도록 하였다. 본 논문에서는 다양한 실험을 통하여 제안한 토크센서의 성능을 검증하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.1061-1062
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• 2011

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집B
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• pp.59-64
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• 2001

The necessity of six axis force-torque sensors have been increased in the field of automatic assembly, polishing and deburing using robotic manipulator recently. This paper presents a simple and compact elastic structure design of the six axis force-torque sensor with a cross-shaped structure and the expected deflection value was induced by theoretical method to design a six axis force-torque sensor and then this theoretical method was verified by comparing with the results using the Finite Element Method(FEM).

• 한국정밀공학회지
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• 제33권4호
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• pp.309-316
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• 2016

In this study, we described the design of a three-axis force/torque sensor for measuring the force and torque in a lower-limb rehabilitation robot. The three-axis force/torque sensor is composed of Fx force sensor, Fz force sensor and Tz torque sensor. The sensing element for Fx force sensor and Tz torque sensor is used in a two-step parallel plate beam, and that of Fz force sensor is used in a parallel plate beam. The rated loads of Fx force sensor, Tz torque sensor and Fz force sensor are 300 N, 15 N m and 100 N, respectively. The three-axis force/torque sensor was designed using the finite element method, and manufactured using strain-gauges. The three-axis force sensor was further characterized. As a result, the interference error of the three-axis force/torque sensor was < 1.24%, the repeatability error of each sensor was < 0.03%, and the non-linearity was < 0.02%.

• 한국전자통신학회논문지
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• 제6권6호
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• pp.873-880
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• 2011

최근 환경오염, 지구 온난화, 화석 연료 고갈 등이 범지구적 문제가 됨에 따라 녹색 에너지 기술 개발이 주목을 받고 있다. 이런 추세에 따라, 자전거가 다양한 스마트 에너지 기술과 결합하여 친환경 근거리 이동수단으로 발전하고 있다. 스마트 자전거 기술과 관련하여 많은 기술이 개발되고 있는데 이중 PAS(Power Assist System)는 사람의 힘과 전기의 힘을 효과적으로 결합하여 배터리로 구동되는 전기 모터를 제어하는 기술이다. 본 논문은 PAS를 구성하는 핵심 기술인 새로운 토크 센서를 제안한다. 이 기술은 기존 기술들과는 달리 자전거 뒤축에 스트레인 게이지를 부착하여 슬립링의 필요성을 없애고 사람에 의해 가해지는 구동축 토크를 측정 할 뿐 아니라, 현재 작동되는 기어의 위치를 근사적으로 추정 가능하게 한다.

• 한국정밀공학회지
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• 제16권2호통권95호
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• pp.5-14
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• 1999

The necessity of six axis force-torque sensors is well recognized in the fields of automatic fine assembly, deburring polishing, and automatic fish processing using robotic manipulators. The paper proposes a simple and compact elastic structure of the force-torque sensor which senses externally applied three force and three torque components. Rough surface strain distribution of the elastic structure is examined analytically, and then more accurate surface strain are obtained from finite element analysis. The compliance matrix which is a linear relationship between force components and strain measurements is obtained for the proposed sensor. Some basic principles of measuring 3 force and torque components are also presented.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 춘계학술대회 논문집
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• pp.393-397
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• 1996

A stewart platform-based force/torque sensor with 6 elastic legs was designed and manufactured Kinematic design parameters were determined so that the force/torque sensor might have the isotropic force/torque properities. In a force/torque analysis, it was used the solution of forward kinematics by linearization of the solution of the inverse kinematics. The performance of te force/torque sensor was investigated by measurement experiments. The gravity compensation was conducted to reduce the force and torque effects by the weights of the upper plate, joints and other sensor parts.

• 한국정밀공학회지
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• 제14권1호
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• pp.78-83
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• 1997

The paper presents the experimental analysis of a Stewart platform-based force-torque senor. The closed-form solution of forward kinematics of the Stewart platform is derived approximately by way of a linearization technique, and the solution is used in the force analysis of the force-torque sensor. An exper- mental studies show that the proposed method including gravity compensation algorithm is valid for Stew- art platform-based force-torque sensors. The performance of the developed force-torque sensor is evaluated in view of accuracy and linearity in measurements.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 추계학술대회
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• pp.835-839
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• 2004

For factory automation using force/torque control, we need a networked-force management system as well as good force sensing and force generation. In this paper, we present a web-based force management system including 6-axis force/torque sensing system. Performance of the force-torque sensor is affected significantly by analog noise that is included in a sensor signal, and the noise should be reduced appropriately to obtain an adequate performance of the sensor. Moreover, the sensor itself should be convenient to install to a real application system. It should be compact in size and also easy to wire in real situation. In this viewpoint, we developed usb-based compact sensor system which is well communicated using web between two computers that exist far away. Software is programmed using LabVIEW and CCS-C. PIC microcontrollers are used for implementing a compact hardware. The proposed system is verified through experimental works.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 추계학술대회 논문집
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• pp.299-300
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• 2009