G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 25/18 (2006.01) G01N 11/00 (2006.01) G01N 27/18 (2006.01)
Patent
CA 2119809
ABSTRACT OF THE DISCLOSURE A heating sensor capable of generating heat and measuring its own temperature is placed in a fluid and a thermometric sensor is placed in the fluid and inside a temperature boundary layer formed around the heating sensor upon heat generation therefrom. A temperature of the heating sensor and a temperature of the fluid are measured. A relationship between thermal conduc- tivity of the fluid and a differential value between the temperature of the heating sensor and the tempera- ture of the fluid is used to determine the thermal conductivity of the fluid. Then, the heating value of the heating sensor is adjustably increased so that the thermometric sensor is positioned outside the tempera- ture boundary layer. A temperature of the heating sensor and the temperature of the fluid are measured. The relationship between kinematic viscosity of the fluid and a differential value between the temperature of the heating sensor and the temperature of the fluid is used to determine the kinematic viscosity of the fluid. Alternatively, a single heating sensor and a pair of the thermometric sensors are used, where one of the thermometric sensors is placed outside the tempera- ture boundary layer, and the other thermometric sensor is placed inside the temperature boundary layer, or a pair of the heating sensors is used with a single 19 thermometric sensor placed outside the temperature boundary layer formed around one of the heating sensors and inside the temperature boundary layer formed around the other heating sensor.
Hori Tomoshige
Itoh Kensuke
Borden Ladner Gervais Llp
Snow Brand Milk Products Co. Ltd.
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