In this paper, in order to perform delicate and advanced grip control like human, a proximity and tactile combination sensor using miniaturized microcantilevers one-fifth the size of previous one as ...the detection part was newly developed. Microcantilevers were arranged with higher spatial density than in previous works and an interdigitated array electrode to enhance light sensitivity was added. It is found that the interdigitated array electrode can detect light with 1.6 times higher sensitivity than that in previous works and the newly fabricated microcantilevers have enough sensitivity to applied normal and shear loads. Therefore, more accurate detection of proximity distance and spatial distribution of contact force become available for dexterous gripping control to prevent 'overshooting', 'force control error', and 'slipping'.
In this paper, we report texture measurement of the fabrics by a multimodal MEMS sensor. This sensor has sensitivity to both multi-axial force vector and light. Therefore, we can evaluate tactile ...texture by force measurement and visual texture by light measurement. This sensor has a possibility for texture measurement with both visual and tactile information in substitution for the human sensory test. In this work, various fabrics were chosen as the target object and evaluated by sensory test method using 10 test subjects. The dependences of the sensor output on reflection of probe light, reactive force, and frictional force by active approaching and touching of the sensor to the object surface were also evaluated. As a result, it is demonstrated that there is a good correlation between the results of the human sensory test and features of visual and tactile sensor output.
A multimodal sensor with Si micro-cantilever embedded in PDMS elastomer for measurement of proximity and touch forces has been fabricated and characterized. DC resistance of the strain gauge on the ...cantilever changes in proportion to the indentation depth of the object. On the other hand, the AC (> 0.5 MHz) impedance including photo-sensitive component of Si increases with increase of distance between the sensor surface and the object because of decrease of light intensity reflected on the object surface. Moreover, the AC impedance is different between grounding and floating of the proximate object because of difference of distribution of electrostatic field between electrodes, so that it is suggested that proximity can be detected as the impedance change by light as well as the electric field.
We propose a method for recognizing workers' routine activities by combining location information and body movements of a user. We describe methods for capturing and recognizing the nursing context ...with an infrared-ID location sensor system and accelerometers worn by a user. We show experimental results of recognizing typical activities in a nursing scenario in a laboratory setting.
The global impact of COVID-19, the disease caused by the novel coronavirus, has caused the whole world to quarantine. Since most of the gyms are closed during the pandemic, people are opting to ...exercise from home. The goal of this research is to combine video chat application and pose estimation function to design a multiuser fitness website that can increase the competition or cooperation level, which in turn increases the motivation to continue exercise in a remote fitness setting. This paper presents an evaluation method of exercise with "MoveNet" model and describes the design of the remote fitness application using that method. As a result, in our system, we have implemented four different exercises such as "Jumping Jacks," "Squat," "Pushup," and "Curls." Our system allows the evaluation of those exercises and can design remote exercise applications using this algorithm.
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