Passive magnetism monitoring method and device for wire rope/rod component stress

Abstract

The invention discloses a passive magnetism monitoring method for wire rope / rod component stress, which comprises the following steps: winding or sheathing a single solenoid coil on a wire rope / rod component; using the wire rope / rod material as a magnetic core on the basis of the magnetic feature of the wire rope / rod material; and constructing a specific screw inductance sensor so as to obtain the change of inductance value caused by the change of the wire rope / rod component stress and further obtain the change of the wire rope / rod component stress. Compared with the traditional magnetism monitoring method, the special excitation coil is not used, a sensing device is relatively simple to manufacture and easy to maintain and upgrade, the time and labor force are saved, and the labor cost is saved. A single coil passive magnetism monitoring device for wire rope / rod component stress which is developed according to the method has compact structure, is conveniently used and has high application value.

Description

technical field [0001] The invention relates to the field of structure monitoring, in particular to a magnetic monitoring method without an external excitation coil for steel cable / rod stress measurement, and also to a magnetic detection device. Background technique [0002] Because of the advantages of high flexibility, high strength, and convenient use, steel cables / rods are widely used in various large-scale structures and buildings as the main force-bearing and force-transmitting components, such as cable-stayed bridges, suspension bridges, cable car ropeways, Expo axes, Airports, grand theaters, large stadiums, etc. In the actual use process, due to the influence of alternating stress, corrosion, wind-induced vibration, etc., the fatigue aging of the steel cable / rod component occurs locally, and the corrosion and fracture of the steel wire caused by this will be directly reflected in the stress of the steel cable / rod; large-scale structures And the whole building will ...

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Problems solved by technology

[0009] In view of this, aiming at the defects of the current magnetic methods, one of the purposes of the present invention is to propose a new passive magnetic monitoring method for the stress of the cable / rod member, and the second purpose is to propose a stress monitoring method for the cable / rod member. The passive magnetic monitoring device can effectively solve the problems of sensor device production, installation and maintenance, signal processing, operation and use, measurement sensitivity, etc.

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