PURPOSE: To obtain a small-sized anemoscope having durability and quck response which can measure even for the gentle wind without having any moving part, by fitting plural temperature sensing elements to the circumference around an electric heater to heat passing air at equal intervals, and detecting temperature distribution due to the flow of heated air.
CONSTITUTION: A wind detecting part 1 consists of an electric heater 10 and four temperature sensing elements. Temperature depending resistors 11W14 are used as the temperature sensing elements. A measuring circuit 2 consists of a heater controlling circuit 3, detecting circuits 4-1, 4-2 and an operation circuit 5. The electric heater 10 is connected to the heater controlling circuit 3. The heater controlling circuit 3 has a function to control the electric heater at a constant temperature. A pair of temperature depending resistors 11, 13 are connected to the detecting circuit 4-1 and a pair of temperature depending resistors 12, 14 are connected to the detecting circuit 4-2. Detecting signals from the detecting circuits 4-1, 4-2 are sent to an operation displaying circuit 5 to calculate and display the wind direction. An arrow X shows the direction of air flow.
EGAMI TSUNEYUKI
KAWAI HISASHI
