Sensing device and monitoring method for active and passive waveguide to monitor damage of bridge pull and sling

Abstract

The invention provides an active and passive waveguide monitoring bridge cable damage sensing device which comprises a hoop, and the diameter of the hoop is matched with that of a bridge cable; five first notch grooves are formed along the axial direction of the hoop; an upper hoop body and a lower hoop body are respectively provided with two second notch grooves along the circumferential direction; one sides of the upper hoop body and the lower hoop body are respectively provided with a cable slot, and the lengths of the cable slots are equal to that of the hoop; each notch groove is provided with twenty piezoelectric ceramic sensors; a signal transmission line is welded on the upper surface of each piezoelectric ceramic sensor; the signal transmission lines are wired along the cable slots and are high-shielding coaxial cables; an insulating layer is arranged on the surface of the sensing device; an electromagnetic shielding layer is arranged on the surface of the insulating layer. The invention also provides a monitoring method of the active and passive waveguide monitoring bridge cable damage sensing device. After the sensing device of active and passive waveguide monitoring bridge cable damage is used, the bridge cable damage data can be well acquired, and the non-destructive detection for the cable data of a whole bridge can be realized.

Description

technical field

[0001] The invention relates to the technical field of construction engineering, in particular to a sensing device and a monitoring method for active and passive waveguides to monitor the damage of bridge tension cables. Background technique

[0002] The long-span bridge structure is the economic lifeline of a country and region, and the construction and maintenance of bridges are an important part of a country's infrastructure. In the long-span bridge structure, the suspension cable is the main force-bearing member. During the service period of several decades, under the coupling action of factors such as environmental erosion, material aging and long-term effects of load, fatigue effects and sudden catastrophe effects, it will inevitably lead to damage accumulation and resistance attenuation of structures and systems. As a result, the ability to resist natural disasters and even normal environmental effects will decline, and in extreme cases it will cause ...

Images