| 摘要 |
PURPOSE:To measure remotely a temp. by detecting a variation in permeability of a magnetic core due to temp. variation as a variation in resonance frequency of a resonance circuit. CONSTITUTION:A coil 2 is wound around the magnetic core 1 to make an inductance 3, and a capacitor 4 is connected to form an oscillating circuit. Since the aemeability decreases with the rise of temp., the inductance is decreased and the resonance frequency is raised. The temp. is measured remotely by counting the oscillated frequency by a counter 6. |
