Strain crack decoupling measurement sensor based on multilayer microstrip antenna

Abstract

The invention discloses a strain crack decoupling measurement sensor based on a multi-layer microstrip antenna. The strain crack decoupling measurement sensor combines a multi-layer structure with a microstrip antenna sensor and comprises a multi-layer measurement patch antenna and a signal transceiving patch antenna, wherein the multi-layer measurement patch antenna comprises a crack measurementpatch and a strain measurement patch, and is connected with the signal transceiving patch antenna through feeder line structures with different sizes, and the signal transceiving patch antenna is in data communication with external equipment through a horn antenna, a two-way power divider and a filter. According to the invention, the strain test and the crack test are arranged in the same area, the crack test can be subjected to micro compensation through the strain measurement value, and compared with the mode that in the prior art, strain measurement and crack measurement are arranged in a partitioned mode, and the influence of structural strain on crack measurement is neglected, a more accurate crack monitoring decoupling value can be obtained.

Description

technical field [0001] The invention relates to the technical field of metal structure safety monitoring, in particular to a strain crack decoupling measurement sensor based on a multilayer microstrip antenna. Background technique [0002] Metal structures, especially steel structures, are widely used in various engineering fields. With the rapid development of high-end intelligent equipment, the design requirements for equipment crack and strain monitoring are increasing. In order to ensure the safe operation of metal equipment and prolong its service life, it is necessary to Real-time health monitoring of the service status of metal structures. The microstrip patch antenna sensor has the advantages of small size, light weight, simple manufacturing, low cost, easy thin film and passive wireless, and has been widely used in the field of safety monitoring of metal structures in recent years. However, conventional microstrip patch antenna sensors can only measure cracks or st...

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Problems solved by technology

The strain crack decoupling monitoring array proposed in the aforementioned patent fails to accurately realize the decoupling monitoring of strain and crack, that is, the strain test is in one area, the crack test is in another area, and the influence of structural strain on the crack test patch is in the aforementioned patent is done in a negligible manner, which reduces the accuracy of crack monitoring

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