Absolute radiation thermometer
US5860741A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An absolute radiation thermometer capable of evaluating the absolute value of infrared radiation power emitted from a target and received by a radiation sensor by means of electrical calibration, and calculating the temperature of the target basing on the responsive signal generated in the radiation sensor. To solve "Microphonic" problem, two identical sensors connected in parallel with the polarized orientations of their pyroelectric layers being in opposite directions so as to cancel the piezoelectric signals generated in the two sensors are used. Further, by using a floating power supply, which is isolated from the system power supply of the thermometer, for performing electrical heating, power supply noise can be greatly reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.