The present invention relates to a monitoring system of wind-induced motion or vibration in at least one overhead cable (102), in particular a conductor aerial cable (102) of a transmission or distribution electric line. The monitoring system comprises: at least three sensor nodes (104) adapted to be installed in positions different from each other on a first overhead cable (102) and configured for detecting the motion or vibration through a synchronous signal acquisition. Each of the at least three sensor nodes (104) comprises a respective triaxial accelerometer sensor (301) configured for acquiring a first node signal and a first processor (302) configured for identifying, in the first node signal, a maximum node amplitude and an associated node frequency through a spectral analysis of the first node signal. The monitoring system further comprises a processing unit (105) operatively associable with the at least three sensor nodes (104) and comprising a second processor (401) configured for comparing to each other at least three maximum node amplitudes respectively of the at least three sensor nodes (104), for identifying a selected maximum amplitude and an associated selected frequency, the selected maximum amplitude being the maximum of the at least three maximum node amplitudes. The respective triaxial accelerometer sensor (301) in each of the at least three sensor nodes (104) is further configured for acquiring a second node signal. The first processor (302) is further configured for identifying, in the second node signal, a node selected amplitude and an associated node selected phase through a spectral analysis of the second node signal, the node selected amplitude and the node selected phase being associated with the selected frequency. The second processor (401) is further configured for calculating a numerical model based on at least three node selected amplitudes and associated at least three node selected phases, for all of the at least three sensor nodes (104), for reconstructing the motion or vibration in any point of the at least one overhead cable (102) according to the selected frequency. The present invention also relates to a related monitoring method and related sensor node.

The present invention relates to a monitoring system of wind-induced motion or vibration in at least one overhead cable (102), in particular a conductor aerial cable (102) of a transmission or distribution electric line. The monitoring system comprises: at least three sensor nodes (104) adapted to be installed in positions different from each other on a first overhead cable (102) and configured for detecting the motion or vibration through a synchronous signal acquisition. Each of the at least three sensor nodes (104) comprises a respective triaxial accelerometer sensor (301) configured for acquiring a first node signal and a first processor (302) configured for identifying, in the first node signal, a maximum node amplitude and an associated node frequency through a spectral analysis of the first node signal. The monitoring system further comprises a processing unit (105) operatively associable with the at least three sensor nodes (104) and comprising a second processor (401) configured for comparing to each other at least three maximum node amplitudes respectively of the at least three sensor nodes (104), for identifying a selected maximum amplitude and an associated selected frequency, the selected maximum amplitude being the maximum of the at least three maximum node amplitudes. The respective triaxial accelerometer sensor (301) in each of the at least three sensor nodes (104) is further configured for acquiring a second node signal. The first processor (302) is further configured for identifying, in the second node signal, a node selected amplitude and an associated node selected phase through a spectral analysis of the second node signal, the node selected amplitude and the node selected phase being associated with the selected frequency. The second processor (401) is further configured for calculating a numerical model based on at least three node selected amplitudes and associated at least three node selected phases, for all of the at least three sensor nodes (104), for reconstructing the motion or vibration in any point of the at least one overhead cable (102) according to the selected frequency. The present invention also relates to a related monitoring method and related sensor node.

A device adapted for use as a warning marker. The device comprising a device body with a first end and a second end, in which the first end and the second end define a longitudinal axis therebetween. A securing means may be attached to the device body first end. The device body comprising at least one projection projecting at an angle from the longitudinal axis of the device body; and wherein the device body is rotatable about the axis relative to securing means.

A device adapted for use as a warning marker. The device comprising a device body with a first end and a second end, in which the first end and the second end define a longitudinal axis therebetween. A securing means may be attached to the device body first end. The device body comprising at least one projection projecting at an angle from the longitudinal axis of the device body; and wherein the device body is rotatable about the axis relative to securing means.

A transmission tower structure for suspending from an arched crossarm a three phased circuit arranged in a compact delta configuration that improves the surge impedance loading (SIL) of a transmission line, reduces its series impedance, lowers both resistive and corona losses, and moderates electromagnetic fields and audible noise effects at the ground level—all achieved in a cost effective manner. The structure further has a low overall height and aesthetic appearance enhancing the public acceptance of the embodiments.

An impact-absorbing wire and/or cable fixture, system, and related methods are disclosed. The impact-absorbing wire fixture apparatus includes a substantially rigid bracket having at least a first arm and a second arm, wherein the first arm is connectable to a utility support structure. A twisted portion is positioned within the second arm, wherein the twisted portion is at least a 90° rotation of the second arm, wherein the twisted portion of the second arm has a width that exceeds a thickness. A fixturing portion is positioned at a distal end of the second arm.

A shield system for an electric power transmission tower includes a plurality of panels configured to be secured to a cross-arm structure of the tower in adjacent, end-to-end arrangement so as to overlie insulators supported by the tower and prevent excrement from birds nesting and/or congregating on the tower from contacting and accumulating on the insulators. Each panel has opposite ends and opposite lateral edges extending between the opposite ends. A plurality of spaced-apart apertures are formed in each panel adjacent each of the lateral edges and at least one of the ends, and each aperture is configured to receive a respective fastener therethrough for securing the panel to the cross-arm structure. Each panel has a shape that generally conforms to a shape of a portion of the cross-arm structure to which the panel is secured.

A shield system for an electric power transmission tower includes a plurality of panels configured to be secured to a cross-arm structure of the tower in adjacent, end-to-end arrangement so as to overlie insulators supported by the tower and prevent excrement from birds nesting and/or congregating on the tower from contacting and accumulating on the insulators. Each panel has opposite ends and opposite lateral edges extending between the opposite ends. A plurality of spaced-apart apertures are formed in each panel adjacent each of the lateral edges and at least one of the ends, and each aperture is configured to receive a respective fastener therethrough for securing the panel to the cross-arm structure. Each panel has a shape that generally conforms to a shape of a portion of the cross-arm structure to which the panel is secured.

A method may include (1) coating a segment of fiber optic cable with an adhesive substance, (2) forming a coil of the segment of fiber optic cable, (3) deforming the coil into a noncircular shape defining a slot external to the coil while obeying a minimum bend radius requirement for the segment of fiber optic cable, and (4) activating the adhesive substance to stabilize the noncircular shape of the coil. Various other methods and apparatuses, such as those for performing the deforming operation, are also disclosed.