| 摘要 |
<p>PURPOSE:To realize the measurement of wind velocity of various fluids with the same hot-wire anemometer, by arranging a plurality of control amplifiers and a changeover switch to select them. CONSTITUTION:A Wheatstone bridge 5 is made up of a hot wire probe 1 and resistances 2-4 and control amplifiers 6 and 6A are connected selectively between output terminals thereof. Outputs of the control amplifiers 6 and 6A are supplied to an anemometer 9 through a current amplifier 7 and a linearizing device 8. The control amplifier 6 has an electric performance suitable for physical nature of a fluid X, for example, air at an atmospheric pressure and the control amplifier 6A has an electric performance suitable for physical nature of a fluid Y, for example, SF6 gas.</p> |
