Archive | 2019
Preliminary Study on Sensing Heart Beat by using Digital Image Correlation Method
Abstract
Introduction. Digital image correlation method (DIC) is an image based deformation measurement method which has been widely used in experimental mechanics field. Thanks to non-contact and simple surface preparation, DIC method is also extended applied on determining the mechanical properties of the soft materials, and bio-materials. Various applications of DIC methods on the bio-materials have been reported for the last two decades, such as determining the mechanical properties of cells by using florescence particles as random tracing marks [1], determining the mechanical properties of muscle and bone [2], detecting the ventricular volume change before and after surgery [3]. This study is part of a project for developing a system for evaluating the cardiac performance improvement before and after heart surgery, the work presented here is to validate whether the ECG signal can be used to trigger the camera for imaging. For the purpose, a camera is triggered by amplified ECG signal to take two images at a cardiac cycle, and then the DIC method is used to calculate the skin displacement to evaluate whether the proposed system can meet the requirement.