This paper presents the modeling, design, and experimental validation of a self-energized sensor system for pressure measurement in the injection mold cavity using ultrasound as the information carrier. The sensor extracts energy from the polymer melt pressure and discretizes the pressure information into ultrasonic pulses for wireless transmission through the mold to a remote receiver. Analytical and numerical models are presented for three constituent components of the sensor: the energy converter, the threshold modulator, and the signal transmitter. Quantitative results were obtained to guide the parametric design of each constituent component. Simulations and experimental studies have validated the functionality of each individual component, as well as the sensor as an integrated unit. In addition to the injection mold pressure measurement, the sensing technique developed is applicable in a broad range of process monitoring applications where high pressure fluctuations occur.
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June 2004
Technical Papers
A Self-Energized Sensor for Wireless Injection Mold Cavity Pressure Measurement: Design and Evaluation
Li Zhang,
Li Zhang
Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003
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Charles B. Theurer,
Charles B. Theurer
Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003
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Robert X. Gao,
Robert X. Gao
Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003
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David O. Kazmer
David O. Kazmer
Department of Plastics Engineering, University of Massachusetts, Lowell, MA 01854
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Li Zhang
Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003
Charles B. Theurer
Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003
Robert X. Gao
Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003
David O. Kazmer
Department of Plastics Engineering, University of Massachusetts, Lowell, MA 01854
Contributed by the Dynamic Systems, Measurement, and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the ASME Dynamic Systems and Control Division July 3, 2003; final revision, November 16, 2003. Associate Editor: A. G. Ulsoy.
J. Dyn. Sys., Meas., Control. Jun 2004, 126(2): 309-318 (10 pages)
Published Online: August 5, 2004
Article history
Received:
July 3, 2003
Revised:
November 16, 2003
Online:
August 5, 2004
Citation
Zhang , L., Theurer , C. B., Gao, R. X., and Kazmer, D. O. (August 5, 2004). "A Self-Energized Sensor for Wireless Injection Mold Cavity Pressure Measurement: Design and Evaluation ." ASME. J. Dyn. Sys., Meas., Control. June 2004; 126(2): 309–318. https://doi.org/10.1115/1.1767850
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