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

Li YR, Su CC, Lin WJ, Chang SH - Sensors (Basel) (2015)

Bottom Line: Three sensor locations were also examined.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 Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan. yanray_@hotmail.com.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus

Composition of the ultrasonic dental handpiece.
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sensors-15-13670-f001: Composition of the ultrasonic dental handpiece.

Mentions: A conventional ultrasonic dental handpiece tool, shown in Figure 1, consists of a dental tool and a Langevin ultrasonic transducer. The Langevin transducer includes a sandwich structure of PZT rings clamped between the horn and the back section. Longitudinal vibration is generated when the alternative voltage is applied to the PZT electrode, and the amplitude is larger at the resonant frequency. Both of the half-wavelength metal parts are configured as the displacement amplifier and are composed of four PZT rings.


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

Li YR, Su CC, Lin WJ, Chang SH - Sensors (Basel) (2015)

Composition of the ultrasonic dental handpiece.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507687&req=5

sensors-15-13670-f001: Composition of the ultrasonic dental handpiece.
Mentions: A conventional ultrasonic dental handpiece tool, shown in Figure 1, consists of a dental tool and a Langevin ultrasonic transducer. The Langevin transducer includes a sandwich structure of PZT rings clamped between the horn and the back section. Longitudinal vibration is generated when the alternative voltage is applied to the PZT electrode, and the amplitude is larger at the resonant frequency. Both of the half-wavelength metal parts are configured as the displacement amplifier and are composed of four PZT rings.

Bottom Line: Three sensor locations were also examined.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 Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan. yanray_@hotmail.com.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus