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Sensors 2015, 15(6), 13670-13679;

Piezoelectric Sensor to Measure Soft and Hard Stiffness with High Sensitivity for Ultrasonic Transducers

Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan
Mechanical and Systems Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 3 April 2015 / Revised: 5 June 2015 / Accepted: 8 June 2015 / Published: 11 June 2015
(This article belongs to the Section Physical Sensors)
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During dental sinus lift surgery, it is important to monitor the thickness of the remaining maxilla to avoid perforating the sinus membrane. Therefore, a sensor should be integrated into ultrasonic dental tools to prevent undesirable damage. This paper presents a piezoelectric (PZT) sensor installed in an ultrasonic transducer to measure the stiffness of high and low materials. Four design types using three PZT ring materials and a split PZT for actuator and sensor ring materials were studied. Three sensor locations were also examined. The voltage signals of the sensor and the displacement of the actuator were analyzed to distinguish the low and high stiffness. Using sensor type T1 made of the PZT-1 material and the front location A1 provided a high sensitivity of 2.47 Vm/kN. The experimental results demonstrated that our design can measure soft and hard stiffness. View Full-Text
Keywords: sinus; piezoelectric sensor; ultrasonic transducer; stiffness; sensitivity sinus; piezoelectric sensor; ultrasonic transducer; stiffness; sensitivity

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Li, Y.-R.; Su, C.-C.; Lin, W.-J.; Chang, S.-H. Piezoelectric Sensor to Measure Soft and Hard Stiffness with High Sensitivity for Ultrasonic Transducers. Sensors 2015, 15, 13670-13679.

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