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This paper presents the design, characterization, and experimental evaluation of a wireless capacitive pressure sensor embedded within a rotating workroll of a microrolling machine for monitoring the production of micrometer-scaled texture on thin metallic workpiece. The sensor converts the spatial and temporal variations of pressure across the interface between the roll and workpiece into capacitance...
Measurement of human physical activity (PA) is important for assessing the health state. A wireless multi-senor integrated measurement system (WIMS) has been designed for measurement of the activity types and intensities of human subjects under free-living conditions. To address challenges posted by the limited battery life and asynchronous data among multiple sensors in the WIMS system, a ZigBee-based...
In this paper, acoustic wave has been investigated as a medium to transmit data from sensors inside a machine to a receiver outside of the machine without wire connection. To evaluate the effectiveness of such a acoustic based data transmission, the propagation of acoustic wave within an injection mold was modeled on the ANSYS platform. The received signal strength as well as the noise level caused...
In-situ measurement of physical activity of human under free-living environment is important for assessing their exposure to the environment. Innovative sensing technology is needed to realize such measurement. This paper presents a wearable, multi-sensor integrated measurement system (IMS) for assessing physical activity. Detailed analysis and simulation were performed for the parametric design of...
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