Patent · US Active

Ultrasonic measurement

US9709534B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

The Lubrizol Corporation · US

Inventors

Oliver Smith · Chesterland, US
Michael R. Sutton · Matlock, GB

Key dates

Filing date	Mar 13, 2013
Grant date	Jul 18, 2017
Priority date	—
Expiry date	Oct 27, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/102
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Ultrasonic measurement apparatus 10 includes a transmitter 14 to transmit an ultrasonic signal 16 into an item 12. A receiver 18 receives echoes 20 from the item 12. The apparatus 10 measures the frequency spectrum of the echo 20 and makes a comparison with another frequency spectrum to extract information relating to a change in the item 12. For example, the item 12 may wear during use. A comparison of the frequency spectrum, with previous frequency spectra, allows changes of dimension of the item 12 to be identified. Changes in amplitudes of the frequency spectrum allow changes in roughness to be detected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.