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In this paper, we present an unobtrusive cuffless blood pressure (BP) monitoring system based on pulse arrival time (PAT) for facilitating long-term home BP monitoring. The proposed system consists of an electrocardiograph (ECG), a photoplethysmograph (PPG), and a control circuit with a Bluetooth module, all of which are mounted on a common armchair to measure ECG and PPG signals from users while...
In recent years, continuing enhancement of highly-functional electronic devices, such as mobile terminal devices, has significantly increased the volume and speed of data transmission. This made high-frequency communication for data transmission between electronic devices essential. Thus, device component suppliers must offer products with low transmission loss in high-frequency range. An insulating...
Recently, continuing growth of highly-functional electronic devices such as wearables is increasing the volume and speed of data transmission and high frequency communication is essential. Thus, device component suppliers must offer products with low transmission loss.
As described herein, we propose a system to hold an open-campus event with a spoken dialogue toolkit that runs on smartphones. This method can reduce printing costs by displaying a browser with information that would otherwise be published in the brochure. Furthermore, by guiding the course with GPS, Google Maps, and walking-path estimation system, guide person is no longer necessary. Furthermore,...
We tested a new model that involves monitoring physiological parameters and the use of a rehabilitation training system to improve team-based healthcare. The system consisted of unobtrusive monitoring, a highly efficient database, and interventions by health professionals. This report discusses the core technologies, especially those involved in monitoring, which have been developed. The unobtrusive...
This study presents an unobtrusive cuffless blood pressure (BP) monitoring system for estimating beat-by-beat systolic blood pressure (SBP) in real-time based on pulse transit time (PTT). The system mainly includes an electrocardiograph with three conductive textile electrodes, a pulse monitor with a LED and a photodetector, a control circuit with a Bluetooth module, and a battery, all of which are...
Wearable devices are the current trend in technology. The wearable technology is moving toward lighter, thinner, more flexibly shaped features. Continuing growth of such highly-functional electronic devices are increasing the volume and speed for data transmission required. In addition, communication between the devices will be at high frequencies. This suggests that device component suppliers will...
An unobtrusive system for monitoring the activities of daily living was developed to improve safety and quality of life. The system was used to monitor walking and safety while bathing. To monitor waking, a matrix array of pyro-electric sensors was installed on the ceiling; to prevent drowning, an accelerometer was installed in the bathtub. The matrix of pyro-electric sensors estimated the walking...
For Japanese vowel recognition based on surface electromyography (sEMG), an electrode grid has been shown to be effective in our previous studies. In this study, we aim to leverage potential of the electrode grid further by using with a spatial shift invariant feature extraction method that can compensate deviation of the attached site of the electrode grid. We verified efficiency of the shift invariant...
We performed a quantitative analysis of the fall-risk assessment test using a wearable inertia sensor focusing on two tests: the time up and go (TUG) test and the four square step test (FSST). These tests consist of various daily activities, such as sitting, standing, walking, stepping, and turning. The TUG test was performed by subjects at low and high fall risk, while FSST was performed by healthy...
Wafer-bonding-based integration can be rapidly and easily tested between different types of devices by wafer-to-wafer flip-chip transfer technology described in this paper. Devices to be tested (e.g. MEMS) on a support wafer are bonded and electrically connected with a target wafer (e.g. LSI) using sticky silicone bumps, and then any of the devices are selectively debonded from the support wafer by...
In this study, a new process to temporarily integrate two components via an elastic and sticky silicone layer was developed. The developed integration process is as easy as contact photolithography and even reworkable, and thus will be useful for the quick test of hetro-integrated devices made of different materials of wafer. It was applied to integrated SAW oscillators with resonance frequencies...
Recently, design of Flip Chip (FC) Package is changing with the higher density of the Package. Conventional process with Capillary Underfill (CUF) is not applicable to PKGs such as 3D and chip stacked types. To solve these problems, other processes are being developed in which an encapsulant is applied on a substrate before bonding IC. One of those is the process with Non Conductive Film (NCF). In...
When a muscle fiber direction and an electrode direction are different, some problems will occur in the surface electromyogram measurement. Therefore, by this study, we propose the surface electromyogram measurement procedure that a muscle fiber direction can estimate from data after measurement. This measurement procedure records differential signals between a reference electrode signal and a signal...
The bottom of a person's foot grips the floor for balance, and the action force and action moment work at the foot bottom when he maintains posture and when he moves. They are important indices in the evaluation and the medical attention of standing pose balance and gait disturbances. A lot of equipments to measure the floor reaction force have been researched. However, no floor reaction force meter...
The bottom of a person's foot grips the floor for balance, and the action force and action moment work at the foot bottom when he maintains posture and when he moves. They are important indices in the evaluation and the medical attention of standing pose balance and gait disturbances. A lot of equipment to measure the floor reaction force have been researched. However, no floor reaction force meter...
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