公开(公告)号：US5756878A

公开(公告)日：1998-05-26

申请号：US585770

申请日：1996-01-16

Applicant: Hiroyuki Muto ,  Yasuhiro Kajio ,  Shoji Kamiunten ,  Mitsuhiko Nagata

Inventor： Hiroyuki Muto ,  Yasuhiro Kajio ,  Shoji Kamiunten ,  Mitsuhiko Nagata

IPC: G01N25/18 ,  G01N27/18

CPC classification number: G01N27/185

Abstract: A thermal conductivity measuring device includes a diaphragm portion, a thermal conductivity detector, a temperature sensor, a control section, and a thermal conductivity calculating section. The diaphragm portion is formed on a base. The thermal conductivity detector is formed in the diaphragm portion to perform conduction of heat to/from a sample gas. The temperature sensor is disposed on the base to be near the thermal conductivity detector so as to measure the ambient temperature around the base. The temperature sensor is thermally insulated from the thermal conductivity detector. The control section controls the amount of energy supplied to the thermal conductivity detector such that the temperature difference between the ambient temperature measured by the temperature sensor and the heating temperature of the thermal conductivity detector becomes a constant value. The thermal conductivity calculating section calculates the thermal conductivity of the sample gas on the basis of the amount of energy supplied to the thermal conductivity detector while the temperature difference is kept at the constant value by the control section.

Abstract translation: 热导率测量装置包括隔膜部分，热导率检测器，温度传感器，控制部分和热导率计算部分。 隔膜部分形成在基座上。 热导率检测器形成在隔膜部分中以对样品气体进行热传导。 温度传感器设置在基座上以靠近热导率检测器，以便测量围绕基座的环境温度。 温度传感器与热导检测器隔热。 控制部分控制提供给热导检测器的能量的量，使得由温度传感器测量的环境温度与热导率检测器的加热温度之间的温度差变为恒定值。 热导率计算部根据通过控制部将温度差保持为恒定值的供给到热导率检测器的能量的量来计算样品气体的热导率。