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TBM 디스크 커터 실시간 마모계측 시스템 개발 및 성능검증
주민석,박민성,김정주,송승우,도승철,정호영,Min-Seok Ju,Min-Sung Park,Jung-Joo Kim,Seung Woo Song,Seung Chul Do,Hoyoung Jeong 한국암반공학회 2024 터널과지하공간 Vol.34 No.2
The Tunnel Boring Machine (TBM) disc cutter is subjected to wear and damage during the rock excavation process, and the worn disc cutter should be replaced on time. The manual inspection by workers is generally required to determine the disc cutter replacement. In this case, the workers are exposed to dangerous environments, and the measurements are sometimes inaccurate. In this study, we developed a technology that measures the disc cutter wear in real time. From a series of laboratory tests, a magnetic sensor was selected as the wear sensor, and the real-time disc cutter measurement system was developed integrating wireless communication modules, power supply and data processing board. In addition, the measurement system was verified in actual TBM excavation circumstances. As a result, it was confirmed that the accuracy and stability of the system.
주민석,배준한,고태국,강연일 연세대학교 산업기술연구소 1994 논문집 Vol.26 No.1
The transient one-dimensional heat conduction equation in a high Tc bulk superconductor with an localized hot zone has been analyzed numerically. After the heater energy is introduced in a few miliseconds, the development of the normal zone and full quench time are calculated with respect to distance as a fuction of three parameters including : transport current, heater current, heating time. The analysis of this model is performed using finite difference method under modified adiabatic condition. The results of computer simulation are also presented in this paper. Full quench occurs when transport currents exceed 1.15[A] in given heater current and heating time. A temperature of superconductor rises abruptly in heating region when heater energy is increased. If heater energy is same, heating time is dominant factor for quench. Given heater energy, ohmic heat dissipation is dominant part for quench. But, heating energy is dominant part for quench than conduction. When heater energy is large, quench is not affected by transport currents.