| 摘要(英) |
This paper presents a non-invasive, non-contact system for the measurement of the human body vibration waveforms of the pulse in the left wrist. This measurement system includes a red light laser, a complementary metal-oxide semiconductor (CMOS) image sensor, a step motor and a personal computer. The light source use red light laser and designed on the step motor, the red light laser projected onto the vibration of the wrist. The laser is moved by a driving stepping motor to shift the projected laser line so that it can scan the surface of tested wrist and use CMOS image sensor to record the process and save as film. Finally, Measurement results show the three-dimensional pulse vibration film and the frequency and amplitude at the position of three acupuncture points on the wrist: Chun, Guan, Chy.
Laser triangulation measurement and the optical centroid method are applied and the Fast Fourier Transform (FFT) method used to get the measurement results. The resolution of CMOS image sensor is 640*480 pixel sizes and per second 30 frame. The results are then processed by the fast Fourier transform (FFT) method to determine changes in the vibration frequency by appropriately changing the frequency domain. The device can automatically define the positions of the three vibrating pulses positions (Chun, Guan, Chy).
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