Portable sensor clamp applied to smart reinforcing steel bars

Abstract

The invention provides a portable sensor clamp applied to smart reinforcing steel bars. The portable sensor clamp comprises a pair of clamping components which are spliced together to form a through cylindrical structure, wherein a through part of the cylindrical structure is of a cylinder shape and is used for completely fitting to the reinforcing steel bars; the middle sectional shape of the cylindrical structure is a regular polygon; a piezoelectric ceramic sensor is directly clung to each edge of the regular polygon; the piezoelectric ceramic sensor motivates stress waves, the stress waves are transmitted to the fitted reinforcing steel bars through a clamp in charge of motivating a signal, and are then received by the piezoelectric ceramic sensor on a clamp in charge of receiving the signal, and the occurrence of damage is analyzed by waveform variation analysis. The portable sensor clamp provided by the invention is relatively small in size, and can be produced in batches; piezoelectric ceramic crystals are adhered inside the clamp in advance, such that not only can the influences, such as short-circuiting be avoided, but also the on-site manufacturing burden of the smart reinforcing steel bars is alleviated; the fitted reinforcing steel bars are simple in manufacturing process and circular in sectional surfaces; the clamp has the capabilities of ensuring the monitoring quality and greatly reducing the complexity of on-site manufacturing.

Description

technical field [0001] The invention relates to health monitoring of reinforced concrete structures, and real-time feedback on internal damage of the concrete structures, in particular to a portable sensor fixture applied to intelligent steel bars. Background technique [0002] It is an important task to carry out regular health monitoring of reinforced concrete buildings, and timely structural safety inspection and assessment of key buildings after a catastrophe. Commonly used damage detection methods for concrete structures include ultrasonic testing, shock elastic wave testing, acoustic emission testing, photographic testing, sensing instrument testing, and optical fiber sensor network testing, etc. These methods require inspectors to visit the site. The result of ultrasonic testing method is more accurate, but it is easy to be limited by the environment; the shock elastic wave method can only detect simple cracks with no branches and the expansion direction is at right a...

AI Technical Summary

Problems solved by technology

However, this kind of smart steel bar needs complex cutting on the surface of the steel bar during production, and its cross-section is regular octagonal. This kind of production process cannot be realized in large quantities during on-site construction, and the quality is difficult to guarantee; Cooperate with conductive silver-containing epoxy resin and excellent production, otherwise it will cause short circuit and other effects, and non-destructive monitoring cannot be realized; if the steel bar is long, it will increase the difficulty of cutting and pasting the sensor, and the steel bar in this case cannot be prefabricated

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