Bolt detection device and system based on double-ring patch antenna with label

Abstract

The invention relates to a bolt detection device based on a double-ring patch antenna with a tag, which is used for detecting whether a bolt for connecting two connecting members is rotated and loosened, and comprises an RFID tag which is arranged on the connecting member and sleeves the outer edge of the bolt, and the RFID tag comprises a first assembly, a second assembly and a third assembly, the second assembly is fixedly arranged on the connecting member, the first assembly and the third assembly are fixedly connected with each other and are matched with the second assembly, an antenna capacitor of the RFID tag is formed between the first assembly and the second assembly, and a bolt fixing part used for sleeving the outer edge of a bolt is arranged on the third assembly; and the first assembly and the third assembly can rotate along with the bolt. Compared with the prior art, the device and system have the advantages of being high in precision, convenient to detect, wide in application range and the like.

Description

technical field [0001] The invention relates to bolt loosening monitoring technology, in particular to a bolt detection device and system based on a tagged double-circular patch antenna. Background technique [0002] Bolts are widely used in connections in civil engineering, transportation, aerospace and other fields, and their high strength and detachable characteristics make their applicability wider. However, bolts are prone to loosening under long-term loading, which will pose a serious safety hazard to the structure. Therefore, for structures that adopt bolted connections, it is necessary to carry out regular bolt monitoring to avoid structural damage caused by bolt loosening. [0003] At present, the commonly used bolt monitoring techniques are: bolt loosening monitoring method based on piezoelectric admittance and strain gauge electrical measurement method. [0004] The bolt loosening monitoring method based on piezoelectric admittance pastes a piezoelectric sensor ...

AI Technical Summary

Problems solved by technology

[0004] The bolt loosening monitoring method based on piezoelectric admittance pastes a piezoelectric sensor on the bolt, and can judge whether the bolt is loose by measuring the peak frequency change in the piezoelectric admittance diagram, but the piezoelectric sensor needs to be excited by a wire, and needs Expensive high-precision impedance analyzer is difficult to be widely used in engineering practice

[0005] The strain gauge electric measurement method accurately measures the axial force of the bolt by measuring the strain of the bolt screw, but the axial force of the bolt is not large, so the measurement accuracy is not high, and it is difficult to be widely used due to the limitation of the installation conditions.

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