Indeed, when the transmitter is excited by means of an electrical signal around its resonance frequency, the piezopolymer
film is free to vibrate forward and backward transmitting an ultrasonic beam.
[USPRwire, Tue Jan 12 2016] Piezoelectric Devices Market by Material (Piezoceramic, Piezopolymer, Piezocomposite), Product (Actuators, Transducers, Motors, Sensors, Generators), Application (Industrial, Automotive, Medical, Consumer) & Geography - Global Trend & Forecast to 2020
The increasing demand for piezopolymers and composite materials; emerging applications of piezo devices such as low-power and portable-energy sources in the medical sector and structural health monitoring, computer disk drives, robotics, accelerometers in cellphones, and notebooks in the consumer sector; increase in funding from investors and governments; and emerging applications of piezoelectric energy harvesting devices are expected to drive the piezoelectric devices market during the forecast period.
The inorganic salt-based piezopolymer
web demonstrated an increase in piezo response ability of more than four times from 1.89 to 8 V for only 0.00133 wt% of the LiCl.
Okugawa, "Motion control of a piezopolymer
bimorph flexible microactuator," Journal of Robotics and Mechatronics, vol.
Specific topics include the characterization of ferroelectric polymers; their use in application applications such as energy storing and harvesting and piezopolymer
biosensors; conducting polymers and carbon nanotubes; electrochemical transistors as chemical sensors; and the combination of charge electrets and organic semiconductors for creating memory devices, inverters, and logic circuits.
These include piezoceramics such as lead zirconate titanate (PZT) and related compounds, piezopolymer
films such as polyvinylidine fluoride (PVDF), and electrostrictive materials such as lead magnesium niobate (PMN).
Scientists around the world use the piezopolymer
for a huge and growing list of applications, ranging from robotic tactile sensors to sleepapnea monitors to help prevent sudden infant death syndrome.