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This work describes a new dataset to improve pedometer evaluation. Prior evaluation techniques focus on regular gaits using laboratory assessment to simplify the manual counting of actual steps. Our goal is to analyze pedometer algorithms under more natural conditions that occur during daily living where gaits are frequently changing or remain regular for only brief periods of time. We video recorded...
A novel procedure to validate the existence of clusters of the Malaysian lady foot shape measurement is proposed in this study. The Cophenetic Correlation Coefficient (CPCC) index is used to determine the optimal linkage method and distance measure. Mixture distribution confirmed the number of clusters. Three foot shape features that are Left Foot Length (LFL), Left Foot Breadth (LFB) and Left Ball...
This research experimentally reveals a sensor application in a future home in the IoE era that the possibility of using piezoelectric energy harvesting chips placed under the shoe insole for sensing foot pressure, or human activity while walking. Commercially available flat type piezoelectric PVDF polymer film chips were used for experiments. Two experiments are conducted: i) output voltage vs. chip...
A life-sized humanoid kicking robot was built as a research tool to investigate the mechanics, kinematics and dynamics of place kicking a rugby ball. The kicking leg is pneumatically-controlled. Thermodynamic analysis estimates the upper limit of the foot speed to be about 38 m/s. The measured foot speed is about 21 m/s with the principal energy loss from back pressure on the discharge side of the...
In order to solve the problem of energy supply for wearable and portable electronic equipment and exoskeleton, a direct energy recovery mechanism based on hydraulic transmission principle was designed. Firstly, according to the particularity of human body structure and function, establish a theoretical model can reflect the state of human body by Lagrange modeling method. Based on the established...
A human height is one property used in conjunction with others for person identification. The method of human height estimation, using only one camera and some simple settings on the floor, is proposed to automatically determine the vertical distance of human head from the ground in real-time. Bimodal background subtraction technique helps locate the position of head top and lower foot bottom in each...
Improving in the quality of life by expanding functionality and durability while continually reducing the fabrication costs and maintaining the possibility of local fabrication, these are the four key design requirements for lower-limb prosthetics with humanitarian applications. Currently, however, there are few foot prostheses that meet these requirements. The solutions available world-wide include...
The population status of disability of the lower limbs represents a challenge to recover locomotion, because they require costly interventions, depending on the characteristics of each patient's needs, prosthetic-orthotic needs, or elements that help in its displacement. Such is the case of canes, crutches, wheel chairs or other items that serve as support and help to generate the static equilibrium...
In this paper, we describe a gait generation method for the crawling motion of a legged robot using Normalized Energy Stability Margin (NESM). The crawling motion is a method of locomotion that, since the robot is very close to a state of falling, its leg and torso are grounded alternately in order to enable the robot to move with a low center of gravity. It has the benefit of decreasing the impact...
This paper introduces a method of posture control for jumping robot on the frontal plane. Human beings can perform the dynamic motion (e.g. running, jumping) by taking an advantage of muscle elasticity. Biped robots with this feature, therefore, have been studied, recently. Especially among them, many robots implemented pneumatic artificial muscles to adopt this feature. These robots have achieved...
The tonic postural system guarantees the stability of the human body in upright stance and during locomotion. It is considered as a complex organization which involves several internal systems and has multiple sources of information. In this paper, we provide a review of techniques and materials for human stability assessment. The primary tools to record and evaluate human sways in static posture...
The paper presents a system of controlling a biomechanical walking machine. Our approach is quite peculiar because it simultaneously solves the inverse and the direct control problem on the basis of the machine model. At first, using the data about the movement of the machine body the trajectories of the feet movement are calculated; then, using the machine model, leg joints turn angles are determined,...
As people age, they become more fragile and exhibit changes in their gait and balance. This state of fragility increases their vulnerability to fall incidents. Gait and balance assessment is usually performed in a clinical setting primarily after a fall. However, daily monitoring has become essential in order to evaluate the quality of gait and alert the patient in case of a risky situation. In this...
Rehabilitation is a process (treatment) aimed at enabling recovery from injuries. Consequently, the patients rebuild their independence and return back to their normal life. For this reason, various systems have been developed such as Rehabilitation Gaming System (RGS), Computer Assisted Rehabilitation Environment (CAREN), etc. Most of these systems use the Virtual Reality (VR) which has a positive...
Monitoring periodic limb movements in sleep (PLMS) is important since it is correlated with people's quality of sleep and several other sleep disorders. The clinically approved method of examining PLMS is polysomnography (PSG) where the sleep of patients are examined in a laboratory with various sensors attached to their body. However, PSG is time-consuming and expensive for patients and the need...
The elderly sometimes fall owing to tripping caused by decreased dorsal flexion during the swing phase. A wearable assist device that was able to increase dorsal flexion to reduce the risk of tripping was proposed in this study. This device assists in dorsal flexion during the swing phase by transferring the tension force from the upper body to the foot by connecting them using strings. To improve...
Three-dimensional stretching is needed to treat equinovarus, which deforms the patient's foot to plantarflexion, adduction, and inversion postures. We have prototyped a three-dimensional stretching machine that the patient can use for the treatment of equinovarus by him- or herself. By adopting a cable-driven mechanism with two independently controllable pneumatic actuators, the stretching machine...
Wearable exoskeleton foot pressure detection system has great significance for human motion information detection and gait recognition. In this paper, the use of resistive pressure sensor to make up for the existing lower extremity exoskeleton pressure sensor input and output non-linear error, which can't accurately detect the lack of plantar pressure changes, through the theoretical calculation to...
The analysis of human motion as a clinical tool can bring many benefits such as the early detection of disease and the monitoring of recovery, so in turn helping people to lead independent lives. However, it is currently under used. Developments in depth cameras, such as Kinect, have opened up the use of motion analysis in settings such as GP surgeries, care homes and private homes. To provide an...
This paper presents a tightly-coupled INS/GNSS integration for personal navigation systems using foot-mounted sensors. Our precise relative positioning INS based on high accurate Zero-Velocity-Updates (ZUPTs) is fused with GNSS pseudo-range and doppler measurements for absolute position and heading estimation. Unique is the decision depending on the classified motion state if doppler measurements...
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