Thermal environment sensor with means to estimate the wind veloc

Details Thermal environment sensor with means to estimate the wind veloc Thermal environment sensor with means to estimate the wind veloc

1991-03-29

1992-04-07

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

Composite temperature-related paramenter

7320419, 236 68B, 374164, 374142, G01K 700, G01K 120, G01P 510

Patent

active

051022303

ABSTRACT:
A thermal environment sensor has a single temperature detector for detecting temperature and producing an output representative of the detected temperature, the temperature detector having, when heated by a predetermined constant power, a convective heat transfer coefficient giving it a wind velocity dependent temperature drop characteristic in close conformity with the wind velocity dependence of the effective temperature drop felt by a human body. A heater is provided for heating the temperature detector, and an electric power supply is connected to the heater for supplying the heater with a constant electric power corresponding to the predetermined constant power, and a temperature estimating circuit is connected to the temperature detector for correcting the output of the temperature detector by a predetermined constant temperature difference for thereby obtaining the effective temperature felt by a human body. Furthermore, a wind velocity estimating circuit is also connect to the temperature detector so that when the temperature detector is alternatingly supplied with a first and a second level of electric power, the absolute value of the wind velocity may be estimated from the heat transfer coefficient of the temperature detector obtained using the temperature of the temperature detector at the first and second levels of power and the respective first and second levels of power.

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