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

Sensors

Yan-Rui Li¹  Chih-Chung Su¹  Wen-Jin Lin¹  Shuo-Hung Chang¹ 

[1]Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan

[2] E-Mails:

关键词: sinus;    piezoelectric sensor;    ultrasonic transducer;    stiffness;    sensitivity;   

DOI  :  10.3390/s150613670

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.