Development and Application of the Single-Spiral Inductive-Capacitive Resonant Circuit Sensor for Wireless, Real-Time Characterization of Moisture in Sand

Figure 4

Experimental setup for evaluating the signal reduction due to separation and alignment between the sensor and coil. Separation distance was defined as the distance between the sensor and coil when both were on the same axis (𝑧 axis). The misalignment was defined as the movement of the sensor away from the 𝑧 axis along the 𝑦 axis.