Ultrasonic Sensor System Using Transducer Array.

Ultrasonic fingerprint sensor using a piezoelectric micromachined ultrasonic transducer array integrated with complementary metal oxide semiconductor electronics

A MEMS Phased Array Transducer for Ultrasonic Flaw Detection

Metal structures can fail because of fatigue crack propagation or because of section loss from corrosion. Regular inspection is required to detect such failures. We report here progress toward the development of MEMS-based transducers for ultrasonic flaw detection, to be permanently mounted at critical locations on structures. In a complete system, a single piezoelectric element will be used to...

High frequency copolymer ultrasonic transducer array of size-effective elements

A layer-by-layer deposition method for producing dual-layer ultrasonic transducers from piezoelectric copolymers has been developed. The method uses a combination of customized and standard processing to obtain 2D array transducers with electrical connection of the individual elements routed directly to the rear of the substrate. A numerical model was implemented to study basic parameters effec...

Laser-scanning photoacoustic microscopy with ultrasonic phased array transducer

In this paper, we report our latest progress on proving the concept that ultrasonic phased array can improve the detection sensitivity and field of view (FOV) in laser-scanning photoacoustic microscopy (LS-PAM). A LS-PAM system with a one-dimensional (1D) ultrasonic phased array was built for the experiments. The 1D phased array transducer consists of 64 active elements with an overall active d...

Photoacoustic and ultrasonic coimage with a linear transducer array.

A technique is developed to simultaneously acquire ultrasound and photoacoustic (PA) images based on a linear transducer array. The system uses conventional ultrasound for rapid identification of potential targets. After a target is identified, the ultrasound echo and PA signals can be simultaneously obtained with optimized excitation and a signal collection sequence. The corresponding ultrasou...