Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation
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Zhongguo Yi Liao Qi Xie Za Zhi · Mar 2015
[Analysis of Pulse Rate Variability and Its Application to Wearable Smart Devices].
In this paper, a reflection type photoelectric pulse wave sensor was designed for short-term pulse rate variability analysis. Photoplethysmography (PPG) signals and ECG signals (obtained with the Dimetek MicroECG recorder Dicare-m1CP) were recorded synchronously from 20 healthy subjects. ⋯ Besides, there are no significant differences (P > 0.05) between the HRV measured by ECG and the PRV quantified by the PPG whether in time domain, frequency domain, or the Poincaré plot parameters. The experimental results suggest that the PPG-based short-term PRV analysis can be consistent with the ECG-based HRV measurement in wearable smart devices.
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Zhongguo Yi Liao Qi Xie Za Zhi · Mar 2015
[Study on Tracheal Intubation's Circular Arc Radius Measuring Method Based on Machine Vision].
It is difficult to measure the circular arc radius for central angle less than 30 degrees. The existing measuring methods are of low efficiency and big error. Through designing the machine vision system and studying the image detecting method for measurement, It is obtained good results by using the new measurement for tracheal intubation's circular arc radius, Realized a rapid and accurate measurement of the circular arc radius, and expanded the application in the field of machine vision.