Weiping Li

Title: Weiping Li: Innovator in Tensile Acoustic Rheometry

Introduction

Weiping Li is a notable inventor based in Ann Arbor, MI (US). He has made significant contributions to the field of material characterization through his innovative work in acoustic techniques. His research focuses on the rheological properties of viscoelastic materials, which are crucial in various applications across industries.

Latest Patents

Weiping Li holds a patent for "Tensile acoustic rheometry for characterization of viscoelastic materials." This groundbreaking technique, known as tensile acoustic rheometry (TAR), utilizes a focused ultrasound transducer to apply an excitation acoustic pulse to a soft viscoelastic material sample. The induced oscillatory motion of the sample is tracked using a high repetition frequency ultrasound pulse-echo technique. A co-linear, confocal ultrasound transducer detects the backscattered echo signal from the sample's surface or interface. The system converts these echo signals into electrical signals, allowing a processor to determine the displacement of the sample interface over time. Additionally, the processor generates a spectrogram, revealing the frequency spectrum of the dynamic surface movement. The viscoelastic properties of the material are then derived from the displacement and spectrogram measurements.

Career Highlights

Weiping Li is affiliated with the University of Michigan, where he continues to advance his research in material science. His work has garnered attention for its innovative approach to understanding the complex behaviors of viscoelastic materials. With a patent portfolio that includes this significant invention, he is recognized as a leader in his field.

Collaborations

Weiping Li collaborates with esteemed colleagues, including Cheri X Deng and Jan P Stegemann. These partnerships enhance the research environment and contribute to the development of new methodologies in material characterization.

Conclusion

Weiping Li's contributions to tensile acoustic rheometry represent a significant advancement in the characterization of viscoelastic materials. His innovative techniques and collaborative efforts at the University of Michigan continue to push the boundaries of material science.