University of Southern California

Hongyu Yu

Eun Sok Kim

Tzung Hsiai

Mahsa Rouhanizadeh

Tiantian Lin

Christina Tiantian Lin

E S Kim

Chuang-Yuan Lee

Gopikrishnan Soundararajan

Gopkrishnani Soundararajan

A micromachined sensor for measuring vascular parameters, such as fluid shear stress, includes a substrate having a front-side surface, and a backside surface opposite the front-side surface. The sensor includes a diaphragm overlying a cavity etched within the substrate, and a heat sensing element disposed on the front-side surface of the substrate and on top of the cavity and the diaphragm. The heat sensing element is electrically couplable to electrode leads formed on the backside surface of the substrate. The sensor includes an electronic system connected to the backside surface and configured to measure a change in heat convection from the sensing element to surrounding fluid when the sensing element is heated by applying an electric current thereto, and further configured to derive from the change in heat convection vascular parameters such as the shear stress of fluid flowing past the sensing element.

MEMS vascular sensor

Techniques, apparatus and systems that use an acoustic transducer with a Fresnel lens to focus an acoustic wave for various applications, including acoustic droplet ejectors.

Self-focusing acoustic transducer with fresnel lens

Growing community of inventors

Los Angeles, CA, United States of America

Hongyu Yu