TEMPERATURE COMPENSATION OF HOT-WIRE ANEMOMETER WITH PHOTOCONDUCTIVE CELL

A new temperature compensation technique for hot-wire anemometer is pr oposed in this article. In contrast to the available compensation tech niques, a photoconductive cell is introduced here as a variable resist or in the bridge. The major advantage of adopting an active component such as photoconductive cell is that temperature compensation can be a chieved by using any kind of temperature sensors, once the output of t emperature sensor is given as a voltage. Validation experiments using a photoconductive cell with a thermocouple-thermometer are conducted i n the temperature range from 30 to 50 degrees C and the velocity range s from 8 to 18 m/s.