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Monitoring biosignals has become more people-friendly since the development of wearable electro-conductive cloth. This paper proposes an application using wearable EMG sensors that estimates the fall risk of elderly people based on co-contraction of the lower limb during walking. Fifty-two healthy elderly people participated in a gait test with continuous EMG of the thigh (rectus femoris and biceps...
We focus on the growing need for a technology that can achieve motion capture in outdoor environments. The conventional approaches have relied mainly on fixed installed cameras. With this approach, however, it is difficult to capture motion in everyday surroundings. This paper describes a new method for motion estimation using a single wearable camera. We focused on walking motion. The key point is...
In this paper, a basic study on acoustic navigation for long range cruising AUV is described. Typically the position of AUV can be estimated by measuring the range between the AUV and acoustic sources or bearing of the acoustic signal. In long range observation, it is difficult to estimate these parameters in three dimensional. Depth can be directly sensed by depth sensor, then we can estimate the...
An autonomous underwater vehicle (AUV) can achieve precise observation in the sea. Also in Japan agency for Marine-earth Science and Technology (JAMSTEC) some observations with AUV ldquoURASHIMArdquo have been implemented mainly in deep ocean. Tracking or navigation of the AUV is significant to make the observations more valuable. Almost AUV equips an inertial navigation system (INS) to navigate own...
This paper proposes a visual navigation system for an unmanned aerial vehicle to track a moving ground object in a GPS-denied environment. Image processing combines a target tracker which provides pixel coordinates of a ground target, and the estimation of optical flow around the detected target position. An extended Kalman filter is applied to estimate position and velocity of the target as well...
In recent years, precious observations by autonomous underwater vehicle (AUV) have been performed. Tracking and navigation of AUV are important for precious observations. In Japan agency for Marine-earth Science and Technology (JAMSTEC) the observations with AUV ldquoURASHIMArdquo have been implemented in deep ocean area. AUV URASHIMA is navigated by an inertial navigation system (INS) mainly. The...
An enhanced reactance-domain estimation of signal parameters via rotational invariance techniques (RD-ESPRIT) algorithm is proposed for direction-of-arrival (DoA) estimation in the full-azimuth plane. Unlike the classical RD-ESPRIT algorithm, the proposed method employs a generalized RD correlation matrix combined with soft selection. The proposed algorithm is expected to allow estimating more than...
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