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1. 发明授权

US5249866A Thermal properties measurement using a superconductor sensor 失效
标题翻译：使用超导体传感器的热性能测量
公开(公告)号：US5249866A
公开(公告)日：1993-10-05
申请号：US890086
申请日：1992-05-29
申请人： William P. Dube , Loren F. Goodrich , John M. Moreland
发明人： William P. Dube , Loren F. Goodrich , John M. Moreland
IPC分类号： G01F23/24 , G01K7/14
CPC分类号： G01F23/246 , Y10S505/70
摘要： 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.
摘要翻译：利用超导材料的热环境感测方法可用于生产低功率低温流量计，测辐射热计，液位探测器和其他类型的热环境传感器。用于确定第一和第二导数（dV / dI和d2V / dI2）的装置利用斜坡电流，直到达到一阶导数（dV / dI）的设定值，电流源被置于反馈模式中以保持一阶导数常数，并监测指示热环境变化的二阶导数（d2V / dI2）中的任何变化。或者，二次导数保持恒定，并测量一阶导数。可以使用指示电压和电流之间的关系的非线性的任何参数来代替二阶导数。

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