Abstract: The position detector of an object includes a body defining an input receiving an optical fibre delivering a light signal, and an output delivering a signal representative of the position of the object. A mirror is mounted to move between first and second positions in the body with respect to the input. The first position or the second position ensures transmission of the light signal from the input to the output. The other of the first position and the second position prevents transmission of the light signal to the output. A spring is mounted in the body in order to place the mirror in the first position. A tip is movable relative to the body between a first position and a second position along a direction of movement and is intended to cooperate with the object to be monitored.

Abstract: The cable transportation installation includes a cable supported by several sheaves of several pillars. At least one pillar is provided with at least one optical fuse defining first and second states enabling or preventing flow of an optical signal. A detection device is configured to detect derailment of the cable from one of the sheaves. The detection device makes a signal flow through the optical fuses to monitor their state. The optical fuses are configured to change state between the first state and the second state when the at least one optical fuse comes into contact with the cable or with one of its supports. The detection device emits an alarm in response to detection of a change of state of one of the optical fuses. Each optical fuse includes an optical fibre.

Abstract: The position detector of an object comprises a body defining an input receiving an optical fibre delivering a light signal, and an output delivering a signal representative of the position of the object. A mirror is mounted to move between first and second positions in the body with respect to the input. The first position or the second position ensures transmission of the light signal from the input to the output. The other of the first position and the second position prevents transmission of the light signal to the output. A spring is mounted in the body in order to place the mirror in the first position. A tip is movable relative to the body between a first position and a second position along a direction of movement and is intended to cooperate with the object to be monitored.