Loren F Goodrich

US Patent:

52498662, Oct 5, 1993

Filed:

May 29, 1992

Appl. No.:

7/890086

Inventors:

William P. Dube - Denver CO
Loren F. Goodrich - Boulder CO
John M. Moreland - Louisville CO

Assignee:

The United States of America as represented by the Secretary of Commerce - Washington DC

International Classification:

G01K 714

US Classification:

374176

Abstract:

A method for thermal environment sensing utilizing superconducting materi finds utility in the production of low power cryogenic flow meters, bolometers, level detectors and other types of thermal environment sensors. A device for determining the first and second derivatives (dV/dI and d. sup. 2 V/dI. sup. 2) utilizes a ramped current until a set value of the first derivative (dV/dI) is achieved, the current supply being placed in a feedback mode to maintain the first derivative constant and monitoring any changes in the second derivative (d. sup. 2 V/dI. sup. 2) which indicate changes in the thermal environment. Alternatively, the second derivative is maintained constant and the first derivative is measured. Any parameter which is indicative of the non-linearity of the relationship between the voltage and the current can be utilized instead of the second derivative.

Address:

526 Aztec Dr, Boulder, CO 80303

Phone:

(303)4942442

VIN:

1HGFA16507L075162

Make:

HOND

Model:

CIVI

Year:

2007