Abstract
In this study, we reported on a high sensitive 2-axial force sensor with cantilever structure for blood pressure pulse wave measurement. Our sensor consists of 2 strain sensors which were embedded in cantilever structure of elastic body. When the normal force is applied, cantilever structure bends. When the shear force applied, cantilever structure twists. Since 2 strain sensors are placed planar, we easily reduce the thickness of the cantilever structure. Therefore the cantilever structure deformed easily and the sensitivity of our sensor becomes higher. We measured the sensitivity of our sensor. The sensitivity of our sensor to forces in normal and shear directions were 0.89 V/N and 0.32 V/N. We measured blood pressure pulse wave and calculated the SNR (Signal to Noise Ratio) of blood pressure pulse wave. The SNR measured by our sensor in vertical and shear directions were 6.6 and 5.2.
