Dual energy power supply
US5661774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1996 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Jun 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosed dual energy baggage scanning assembly includes a CT scanning system, and a conveyor belt for transporting items through the CT scanning system, and an improved power supply for the X-ray source of the CT scanner so that a dual energy beam is provided. The power supply alternately powers the X-ray tube of the scanning system at high and low voltage levels at a predetermined rate and comprises at least one high voltage DC power supply for providing a stable, high DC voltage the X-ray tube; means, including at least one waveform generator, for providing a periodic time varying waveform; and coupling means, including a transformer, for coupling the waveform generator to said DC voltage supply so that the total voltage across the cathode and anode of the tube is periodically changed between the high and low voltage levels at the predetermined rate in response to the periodic time varying waveform provided by the waveform generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.