Abstract
Two types of sensing systems are developed for very early-stage diagnostics of human diseases and for monitoring human movements for nursery cares. The first is based on the development of a portable gas sensor system having high sensitivity and gas-selectivity. It allows monitoring breath gas components and concentrations for hydrogen in a short time interval of less than 3 min. We are conducting a project gathering breath gas samples from a large number of healthy volunteers. From more than 400 volunteer's samples, we found that hydrogen contents in breath gas of healthy people depended on several factors; age, foods, passage, and exercise habit. The second system is a large sized textile that gives electric signals of distributed force applied to the textile surface, and also of tensile strain of the textile. It allows us using the textile for monitoring human movements when spread on a bed surface or patched as a part of wear like shirts or jackets. We started monitoring use of the sensing textile in a shape of bed sheets of aged people in a care-house for the purpose of alarming bedsore which is known to occur by consistently applied pressure to human body.
