Systems and methods for measuring the specific modulus of cellular ceramic bodies

US8074518B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• John D. Helfinstine · Big Flats, US
• Robert Arthur McIntosh · Riverside, US
• Lisa Marie Noni · Horseheads, US
• Zhiqiang Shi · Lo Wu, CN
• Sujanto Widjaja · Cupertino, US
• David John Worthey · Elmira, US

Key dates

• Filing date: Aug 25, 2008
• Grant date: Dec 13, 2011
• Expiry date: Aug 12, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01H5/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Systems (50) and methods for measuring and displaying a visual and/or graphical representation of the specific modulus (E/ρ) of a cellular ceramic body (10), such as those used to form particulate filters, are disclosed. The ultrasonic measurement system employs an ultrasonic transmitter (52T) and an ultrasonic receiver (52R) adjacent to, but spaced apart from respective ends (16, 18) of the ceramic body. Multiple ultrasonic waves (80) are sent through corresponding multiple longitudinal portions (12P) of the honeycomb structure (12), where adjacent longitudinal portions overlap. Time of flight (TOF) measurements (TOF1, TOF2), along with other parameters describing the ceramic body, allow for the measurement of the sonic speed (cmat) of the ultrasonic waves that pass through the ceramic body as well as the attenuation (IR). The specific modulus is then calculated from the square of the sonic speed (C2mat). The high resolution of the ultrasonic measurements allows for improved evaluation of the manufacturing process.