Three-dimensional temperature probe
US4513749A · kind A · utility
142Cited by
10References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1982 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Nov 18, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02881
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Two coaxial acoustic beams, one focused and the other unfocused, are used to measure changes in temperature within a localized region in a body. The focal region of the focused beam is located at the area to be measured. Changes in the relative phase angle between the two beams are indicative of changes in acoustic properties occurring at the focal region. Since the two beams have generally the same propagation path outside of the focal region, they will be similarly affected by acoustic variations which occur there, so there will not be any relative phase change between them due to such variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.