公开(公告)号：US20090067474A1

公开(公告)日：2009-03-12

申请号：US12220270

申请日：2008-07-23

Applicant: Chao-Chi Lee ,  Yeow-Chin Chen

Inventor： Chao-Chi Lee ,  Yeow-Chin Chen

IPC: G01K7/16

CPC classification number: G01K7/16 ,  G01K7/02 ,  G01K13/002

Abstract: A method and a system thereof for adjusting a temperature sensing element are proposed. The temperature sensing element is coupled to a control chip and has a temperature sensing resistor. Firstly, a memory area of the control chip is set to pre-store a temperature standard, and a predetermined standard is defined such that the temperature standard is equal to the predetermined standard ±ΔT. Then, the temperature sensing element is placed in and thermal equilibrates with a constant-temperature environment. The temperature sensing resistor is oscillated until a temperature measured by the temperature sensing element is consistent with the predetermined standard such that a first oscillation time is determined. A reference resistor is provided and oscillated based on the first oscillation time to determine an updated temperature standard, and then the updated temperature standard is stored to the memory area to replace the temperature standard pre-stored in the memory area.

Abstract translation: 提出了一种用于调节温度感测元件的方法和系统。 温度感测元件耦合到控制芯片并具有温度感测电阻器。 首先，将控制芯片的存储区设定为预先存储温度标准，并且定义预定标准，使得温度标准等于预定标准±ΔT。 然后，温度感测元件放置在恒温环境中并与之平衡。 温度感测电阻器振荡，直到由感温元件测量的温度与预定标准一致，从而确定第一振荡时间。 提供参考电阻并基于第一振荡时间振荡以确定更新的温度标准，然后更新的温度标准被存储到存储区域以替换预先存储在存储区域中的温度标准。

公开(公告)号：US5552371A

公开(公告)日：1996-09-03

申请号：US245224

申请日：1994-05-17

Applicant: Yeow-Chin Chen ,  Ran-Jin Lin ,  Ru-Shi Liu

Inventor： Yeow-Chin Chen ,  Ran-Jin Lin ,  Ru-Shi Liu

IPC: G01F23/24

CPC classification number: G01F23/248 ,  G01F23/247 ,  Y10S505/78 ,  Y10S505/842

Abstract: An apparatus and method for continuously monitoring the liquid nitrogen level a liquid nitrogen container and automatically refilling liquid nitrogen from a liquid nitrogen reservoir when the liquid nitrogen in the container falls below a predetermined level. The apparatus comprises a liquid nitrogen level sensing element, which contains a superconducting material, such as a YbaCuO type superconductiing material, disposed on a non-conducting substrate, such as magnesium oxide. The superconducting material is selected such that it has a critical temperature approximately equal to the boiling point temperature of liquid nitrogen. The superconducting material is placed near the predetermined level and, under normal conditions, the superconducting material exhibits zero or near zero resistance. When the level of liquid nitrogen falls below the predetermined level due to heat loss or other reasons, the resistance of the superconducting material will increase substantially, thus triggering a control means to open a solenoid valve and allow liquid nitrogen to flow from the reservoir to the container. The liquid nitrogen level sensing element can be prepared by photochemically etching a superconducting layer, which has been deposited on the non-conducting substrate, in accordance with a serpentine design, to thereby increase the sensitivity and reliability thereof.

Abstract translation: 一种用于在容器内的液氮下降到预定水平以下时，液氮容器连续地监测液氮容器并自动从液氮储液器再充填液氮的装置和方法。 该装置包括液氮传感元件，其含有设置在诸如氧化镁的非导电衬底上的超导材料，例如YbaCuO型超导材料。 选择超导材料使其具有近似等于液氮沸点温度的临界温度。 超导材料放置在预定水平附近，并且在正常条件下，超导材料表现为零或接近零电阻。 当液态氮由于热损失或其他原因而降到预定水平以下时，超导材料的电阻将显着增加，从而触发一个控制装置来打开一个电磁阀，并允许液氮从贮存器流到 容器。 液氮检测元件可以通过根据蛇形结构对已经沉积在非导电基底上的超导层进行光化学蚀刻来制备，从而提高其灵敏度和可靠性。