Terfenol-D tooth phone performance characterization and optimization
| Autor: | Mark E. Staley, Alison B. Flatau |
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| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 97:10R508 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.1855151 |
| Popis: | A Terfenol-D transducer has been developed for use as a tooth phone with both sensing and actuating capabilities by Audiodontics, Inc. This research focuses on characterizing the sensitivity of the tooth phone’s magnetostrictive Terfenol-D rod performance in both sensor and actuator modes to changes in the initial prestress of the device. A test apparatus was designed to allow prestress variability while operating the transducer as either a sensor or an actuator. To assess the sensor-mode performance, a force-feedback loop control system was used to excite the tooth phone with a constant force from a mechanical shaker at the tooth–tooth phone interface surface while measuring the voltage generated in the transducer’s coil. The shaker was driven with a 200Hzto7kHz swept sine at various dynamics force loadings for prestresses ranging from 0.25to3.5ksi. The results indicate a prestress of 2ksi offers the best sensor-mode performance. To assess the actuator performance, a accelerometer was attached to the too... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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