| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a radar device capable of accurately measuring the hot metal level of the inside of a converter, a hot metal preliminary treating furnace and a hot metal torpedo car, the charge matter level of the inside of a blast furnace or the like. SOLUTION: A microwave oscillated from a microwave oscillator 42 and transmitted to a wave guide 3 through a transmitting rod 34 is converted into an irradiation circularly polarized wave on the halfway of the wave guide 3 of the radar device comprising an antenna 2, the wave guide 3 and a radar unit 4 having the microwave oscillator 42, a circularly polarized wave generator 33 for converting an anti-circularly polarized wave received through the antenna 2 into a linearly polarized wave is provided, a receiving rod 35 is provided at a position having a different 90 deg. phase to the transmitting rod 34 in the reverse antenna side of the circularly polarized wave generator 33, and only the linearly polarized wave converted from a reflection circularly polarized wave turned in the contrary direction to the turning direction of the irradiation circularly polarized wave is received.</p> |
