Method for measuring the level of liquid cryogen in a cryogen vessel
US8316707B2 · kind B2 · utility
1Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2011 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Sep 16, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method for measuring the level of liquid cryogen in a cryogen vessel, a current pulse is applied to a cryogen level probe includes an ignition current pulse part of sufficient magnitude to ensure that a resistive front propagates down the probe to below the liquid cryogen surface; a recovery current pulse part allowing that part of the superconducting wire below the surface of the liquid cryogen to return to a superconducting state; and a measurement current pulse part of sufficient magnitude and duration to allow an accurate measurement of the superconducting wire's resistance to be measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.