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Magnetoelastic Force Sensor Using Amorphous Alloy
손대락,김창석,Son, D.,Kim, C.S. The Korean Magnetics Society 1991 韓國磁氣學會誌 Vol.1 No.1
비정질 합금의 최대자기유도변화를 이용한 힘센서를 제작하였다. 시편의 단면적이 $6{\times}10^{-8}/m^{2}$이고 힘의 범위가 0-1N에서 힘센서의 선형도는 0.1% 이상이였으며, 분해능이 $1{\times}10^{-4}N$ 이였다. 또한 이 힘센서는 자화주파수와 동일한 셈플링속도로 과도적인 힘을 측정할 수 있음을 보여 주었다. A force sensor which employ the measurement of the change in the maximum induction of an amorphous core was constructed. This force sensor has a standard deviation of the non-linearity less than 0.1% within the range of 0 to 1 N, and a resolution of $1{\times}10^{-4}N$ for the core cross section of $6{\times}10^{-8}/m^{2}$. The sensor can also measure transient force at a sampling rate of 10 kHz which is the same as the magnetizing frequency of the core.
손대락(D. Son),임순재(S. J. Lim),유중렬(J. Y. Yoo),김창석(C. S. Kim) 한국자기학회 1991 韓國磁氣學會誌 Vol.1 No.2
A new kind of a non-contact torque sensor which uses the difference of the maximum magnetic inductions as measurand was constructed. The torque sensor utilizes the tensile and compressive stress of two cores which are attached on the rotating shaft. This sensor shows that the linearity was better than 1%, and the transient torque can be measured at the sampling rate of 10 ㎑ which is the same as magnetizing frequency of the core.
인공위성 자세제어용 Magnetic Torquer 개발
손대락(D. Son) 한국자기학회 2008 韓國磁氣學會誌 Vol.18 No.2
Magnetic torquer, which uses torque between magnetic dipole moment and earth magnetic field, has been used to control attitude of satellites. In this work, we developed a magnetic torquer for small scientific satellite and test under environmental conditions of the satellite launching and orbital motion have been carried out. The developed magnetic torquer shows saturation magnetic dipole moment of 15 A㎡, linearity of 0.3% in the range of ±12 A㎡, mass of 0.46 ㎏, and power consumption of 1Watt at magnetic dipole moment of 10 A㎡.
손대락(D. Son),금채(Chae Kum) 한국자기학회 2000 韓國磁氣學會誌 Vol.10 No.4
We have constructed a rotational loss measuring system which consists of two yoke system for rotational magnetization and 4-channel transient recording system for Hx, Hy, Bx and By measurements. Using the constructed measuring system, we have mesaured rotational energy loss for non-oriented electrical steel sheets. Rotational energy loss was depending on the angle between B-search coil and H-search coil, and the direction of rotation (clockwise and counter clockwise). The average of the rotational energy losses under clockwise and counter clockwise was independent of the angle between B-search coil and H-search coil, and we could improve measuring uncertainty using the averaged rotational energy losses.
Magnetoelastic Force Sensor Using Amorphous Alloy
손대락(D. Son),김창석(C. S. Kim) 한국자기학회 1991 韓國磁氣學會誌 Vol.1 No.1
A force sensor which employs the measurement of the change in the maximum induction of an amorphous core was constructed. This force sensor has a standard deviation of the non-linearity less than 0.1% within the range of 0 to 1 N, and a resolution of 1×10-⁴N for the core cross section of 6×10^(-8)㎡. The sensor can also measure transient force at a sampling rate of 10 ㎑ which is the same as the magnetizing frequency of the core.