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TCSPC 시스템의 피코초 레이저 광원과 광 검출기 간의 동기화를 위한 낮은 지터 신호 변환기
배효인(Hyoin Bae),이형민(Hyungmin Lee),이창혁(Changhyuk Lee) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
TCSPC (Time-Correlated Single Photon Counting) is a crucial method for Lidar, Fluorescent imaging, and quantum computing/sensing applications. A typical TCSPC system analyzes the statistical characteristic by repetitively measuring the emission and detecting pulsed light at the single photon level, which necessitates measurement reliability via low noise. This paper proposes a simple yet effective method connecting picosecond-level accurate time reference between diverse instrumentation standards. We employed a low-noise dual power supply and anti-reflection transmission line design to connect different signal standards without adding excessive noise (jitter). In general, picosecond laser light source outputs laser pulse locked current mode output (e.g., NIM, ECL) where SPAD, TDC, and TCSPC signal processing hardware inputs logic level signal below 3.3 V. By using a four-channel low jitter comparator we demonstrate a TCSPC capability via NIM – Voltage Logic Level. The resulting jitter performance of the proposed system is verified via a measurement of the Instrument Response Function of a SPAD 33.623 psec. This result verifies the efficacy of the TCSPC systems based on the proposed signal translator.
임정수(Jeongsoo Lim),허정우(Jungwoo Heo),이정호(Jungho Lee),배효인(Hyoin Bae),오준호(Jun-Ho Oh) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.3
This paper covers improvement of the humanoid robot platform HUBO2, known as the HUBO2+. As a necessity of the growth of the humanoid platform, a robust, reliable and user friendly platform is needed. From this standpoint, HUBO2+ is the most improved humanoid robot platform in the HUBO series. The mechanical design has been changed to increase the movable range and to stop joint compulsion. Additionally, all of the electrical parts are re-designed to be un-breakable in an unexpected situation. A smart power controller with robot status check panel is attached on the back. Additionally, a diagnosis tool, the HUBO-i, has been developed. Moreover, each joint motor controller of HUBO2+ has a Protection Function and a PODO system is provided for handling the robot easily.