High-sensitivity stress sensing aggregate suitable for intelligent pavement

Abstract

The invention discloses a high-sensitivity stress sensing aggregate suitable for an intelligent pavement. The high-sensitivity stress sensing aggregate comprise an outer shell, a spherical stress sensing layer is arranged in the outer shell in a matched mode. A plurality of piezoelectric patches coded according to spatial positions are uniformly distributed and arrayed on the outer surface of thespherical stress sensing layer; an inner protective shell is arranged in the spherical stress sensing layer in a matching manner; a functional packaging body is arranged in the inner protective shell;a central processing unit, a signal transmission module and a power supply module are arranged in the functional packaging body; wherein each piezoelectric patch is electrically connected with the central processing unit, the central processing unit is electrically connected with the signal transmission module, the power supply module is electrically connected with the central processing unit andthe signal transmission module, the central processing unit is used for converting electric signals of the piezoelectric patches into stress information, and the signal transmission module is used for sending the stress information to an external information receiving device. According to the invention, the contact effect between aggregate particles can be accurately distinguished, and the particle stress mode and the stress propagation rule can be accurately analyzed.

Description

technical field [0001] The invention belongs to the technical field of intelligent pavement self-perception and road performance monitoring, and in particular relates to a high-sensitivity stress-sensing aggregate suitable for intelligent pavement. Background technique [0002] Intelligent pavement is an important development direction of road construction technology in the future and the basis for the realization of intelligent transportation functions. In recent years, the intelligentization of high-grade highways through sensor empowerment has received widespread attention in the industry. Compared with traditional sensors, smart aggregates have good compatibility, and have the ability to monitor changes in pavement mechanical properties and other service performance without affecting the structural integrity of the pavement. As a multi-phase particle system, asphalt mixture has a very complex stress transfer law and internal particle stress mode under the action of traf...

AI Technical Summary

Problems solved by technology

[0003] Inside the structure of asphalt mixture pavement, the contact conditions between aggregate particles are divided into point-point contact, multi-point contact, point-surface contact, surface-surface contact and no contact. At present, the intelligent bone in the laboratory These contact effects cannot be accurately distinguished, and the particle force mode and stress propagation law cannot be accurately analyzed. That is to say, there are differences between the stress and strain measured by aggregates in the prior art and their actual force conditions.

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