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This paper describes a wireless data transmission technique using acoustic waves as the information carrier for on-line injection molding process measurements, including melt temperature, pressure, velocity and viscosity. A design scheme of the optimization of the input electrical impedance matching with the transmission system of the multivariate sensor based on the bond graph modeling approach is...
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...
Improving process observability is of high relevancy to improved manufacturing process control. This paper describes a novel measurement technique using acoustic waves for the transmission of multiple physical parameters from within the cavity of an injection mold to a receiver outside: temperature, pressure, velocity, and viscosity of polymer melt. Such a technique is a key to improved monitoring...
On-line monitoring of polymer melt state is critical to ensuring part quality in injection molding. This paper presents the design of a dual-parameter acoustic wireless sensor for simultaneous measurement of pressure and temperature variations within the mold cavity. The sensor consists of three major functional components: a piezoceramic energy harvester, a modulator circuit, and an electric-acoustic...
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