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아날로그 로그 검출기를 활용한 C-Scan 고주파 초음파 시스템 구현
이강명(Gang-Myung Lee),박상호(Sang-Ho Park),백광렬(Kwang-Ryul Baek) 제어로봇시스템학회 2020 제어·로봇·시스템학회 논문지 Vol.26 No.4
In this paper, we implement a C-Scan 70 MHz ultrasonic system using an analog log detector, and we conduct experiments with this system. If a system with a 70 MHz ultrasonic system is implemented using conventional methods, the required sampling frequency ranges between 420 MHz to 700 MHz, which is 6 to 10 times the ultrasonic frequency. Instead, we propose a method to detect envelopes using an analog log detector in addition to a double probe structure to create a system with an ultrasonic frequency of 70 MHz. After implementing this system corresponding to the proposed method, we verified the performance of the system through the results. The results indicate that the sampling rate is approximately 0.057 times the ultrasonic frequency, resolving the data collection and storage space problem that is due to the high sampling rate found in high-frequency ultrasonic systems.