Satoshi Hosoya

On‐demand production system of apparel on the basis of Kansei engineering

This paper argues for the immediate use of Kansei engineering to help deal with the chaotic situation of poorly implemented and disconnected technologies. A theoretical criticism of the current industrial capitalism, together with the promotion of a new post‐industrial form of capitalism, lays the foundation for an explanation of how this transition can be achieved through a proper understanding of Kansei. A detailed explanation of the interactive production system apparel demonstrates the benefits to both manufacturers and consumers. The paper concludes that the application to apparel is just one of the many potential applications to improving the lifestyle and enjoyment of individuals in the entire society.

Influence on Calculated Blood Pressure of Measurement Posture for the Development of Wearable Vital Sign Sensors

We studied a wearable blood pressure sensor using a fiber Bragg grating (FBG) sensor, which is a highly accurate strain sensor. This sensor is installed at the pulsation point of the human body to measure the pulse wave signal. A calibration curve is built that calculates the blood pressure by multivariate analysis using the pulse wave signal and a reference blood pressure measurement. However, if the measurement height of the FBG sensor is different from the reference measurement height, an error is included in the reference blood pressure. We verified the accuracy of the blood pressure calculation with respect to the measurement height difference and the posture of the subject. As the difference between the measurement height of the FBG sensor and the reference blood pressure measurement increased, the accuracy of the blood pressure calculation decreased. When the measurement height was identical and only posture was changed, good accuracy was achieved. In addition, when calibration curves were built using data measured in multiple postures, the blood pressure of each posture could be calculated from a single calibration curve. This will allow miniaturization of the necessary electronics of the sensor system, which is important for a wearable sensor.

Research for wearable multiple vital sign sensor using fiber Bragg Grating — Verification of several pulsate points in human body surface

The concern for human welfare has produced great demands for a rapid and continuous sensing system for vital signs in humans. In particular, wearable systems are required because they can monitor health status over a prolonged period. We have used a Fiber Bragg Grating (FBG) sensor to develop a wearable multiple vital sign sensor. The FBG sensor is installed at the pulsate points in a human body surface. The FBG sensor can measure human pulse waves. In this paper, the measurement result at several pulsate points on a human body surface is presented. The measurement pulsate points are the temple, finger, ankle, and dorsum pedis. The pulse wave signal can be measured by an FBG sensor. The pulse rate and blood pressure (BP) are calculated using these measured signals. The pulse rate can be measured using the interval of measured pulse waves. The calculated BP value is different from the reference BP value due to the difference between the waveform of the measured signal at each pulsate points and the measurement method of the reference BP value. If attention is given to these factors, the vital signs measured at each pulsate points can be obtained.