Abstract
Recently, the aging society is advancing very rapidly. An increase of apoplexy and brain infarct patients is expected because of aging. It also causes an increase of hemiplegic patients too. Many basic actions such as walking, standing, and so on are difficult for hemiplegic patients. So they are supported from family, nurse and so on in many situations. In this paper, the knee assist device that can detect condition of lower limbs by foot sensor and encorder of knee joint is developed. This device can prevent a collapse of knee joint and assist safe standing by that lower limbs' conditions.
