Time phased constant IR energy delta source
US6881951B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 2003 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Oct 13, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/53
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for delivering a constant radiant energy delta to calibrate a railway hot box detector. A wheel including an aperture is rotatingly supported within the apparatus. A temperature sensor senses the temperature of the wheel, and a radiant energy source is mounted within the apparatus such that the wheel, when rotated, periodically allows radiant energy to be transmitted directly from the energy source through the aperture to a hot box detector being calibrated. A processor is provided to receive the temperature sensed by the temperature sensor and operate the energy source at a radiant energy setpoint by determining the present temperature of both the energy source and the present temperature of the wheel and the desired radiant energy delta.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.