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

A sensing device and a technology for pulling slings, which are used in material analysis using sonic emission technology, and solid analysis using sonic/ultrasonic/infrasonic waves, which can solve problems such as unsatisfactory monitoring effects on damage evolution of slings

Active Publication Date: 2016-04-20
FUJIAN BUILDING ENG QUALITY INSPECTION CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, based on the active waveguide monitoring technology (ultrasonic guided wave), some applications have been applied in the damage monitoring of bridge slings. This method has good detection accuracy for existing damage, but the effect of monitoring the damage evolution of slings is not ideal.

Method used

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

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Embodiment Construction

[0022] see figure 1 and figure 2 As shown, a sensing device for active and passive waveguide monitoring bridge sling damage, the sensing device includes a hoop 1 matching the diameter of the bridge sling; the axial direction of the hoop 1 There are at least 5 first notches 11, and each first notch 11 is evenly distributed; the clamp 1 includes upper and lower hoop bodies (12, 13); the upper hoop body 12 and the lower hoop body 13 There are at least 2 second grooves 14 respectively in the circumferential direction; the total 4 second grooves 14 of the upper hoop body 12 and the lower hoop body 13 are evenly distributed, and the upper hoop body 12 and the lower hoop body 13 are fastened two times. The second notch 14 on the diagonal forms an included angle α of 90 degrees; one side of the upper hoop body 12 and the lower hoop body 13 is respectively provided with a slot (not shown) with the same length as the hoop 1; the 5 4 piezoelectric ceramic sensors 3 are arranged on the...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/14
Inventor 杨伟张文耀张伟夏坚陈松叶健
Owner FUJIAN BUILDING ENG QUALITY INSPECTION CENT
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