Title :
A new ultrasonic measurement system for tremor
Author :
Huang, C.F. ; Huang, S.S. ; Yang, Meng-Hsiang ; Young, M.S. ; Lee, K.Y. ; Chen, R.C.
Author_Institution :
Dept. of Electron. Eng., Cheng-Shiu Inst. of Technol., Kaohsiung, Taiwan
Abstract :
A new binary amplitude-shift-keyed (BASK) ultrasonic tremor measurement system for use in isothermal air is developed. Our microcomputer-based system includes two important parts. One of which is BASK modulation signal generator. The other is a phase meter designed to record and compute the phase shifts of the three different frequencies and the result motion is then sent to either an LCD for display or a PC for calibration. By the proposed method, we can conduct larger range measurement than the phase-shift method and also get higher accuracy compared with the time-of-flight (TOF) method. Experiments are done in the laboratory using BASK modulation for the frequencies of 200 Hz and 1 kHz with a 40 kHz carrier.
Keywords :
amplitude shift keying; biomedical ultrasonics; medical computing; microcomputer applications; phase meters; ultrasonic measurement; vibration measurement; 1 kHz; 200 Hz; 40 kHz; binary amplitude-shift-keyed ultrasonic tremor measurement system; microcomputer-based system; modulation signal generator; phase meter; phase shifts; phase-shift method; tremor ultrasonic measurement system; Calibration; Frequency modulation; Optical interferometry; Optical transmitters; Phase measurement; Pulse modulation; Strain measurement; Ultrasonic transducers; Ultrasonic variables measurement; Vibration measurement;
Conference_Titel :
Biomedical Engineering, 2003. IEEE EMBS Asian-Pacific Conference on
Print_ISBN :
0-7803-7943-8
DOI :
10.1109/APBME.2003.1302683
