| 摘要 |
PURPOSE:To satisfactorily recognize the state of clamping of soil by projecting the electromagnetic wave of a prescribed frequency into a bulk substance clamping the soil, receiving a reflected wave, and analyzing an electric characteristic. CONSTITUTION:The electromagnetic wave W of a frequency which is influenced most intensively by the clamping of the soil 2 is transmitted from a transmitter 5, and the electromagnetic wave W reflected from the boundary of a substrate 1 and the soil 2 is received by a receiving antenna 4 and sent to a receiver 6. The signal of this received electromagnetic wave W is sent to an analyzer 7, in which electric characteristics (for instance, the velocity of propagation, dielectric constant, attenuation factor, etc.) of the soil 2 by the electromagnetic wave W is calculated. These electric characteristics are varied by the clamping degree of the soil 2, therefore, by reading such electric characteristics, the clamping degree of the soil 2 can be known. In such a way, the measured and analyzed electric characteristics can be displayed by a graph, etc., by an indicator 8.
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