Fig. 1. Layout of stretched wire

Fig. 2. Optical-wire position system/sensor

Fig. 3. Photoelectric-wire position system/sensor

Fig. 4. Inductive-wire position system/sensor

Fig. 5. Capacitive-wire position system/sensor

Fig. 6. Laser scan-wire position system/sensor

Fig. 7. Directional coupled-wire position system/sensor

Fig. 8. Vibrating-wire position system/sensor

Fig. 9. Eigen/Natural frequency-wire position system/sensor