In the field of structural health monitoring concrete bridges, one most challenging problems is crack identification. our previous study, we proposed a crack-sensitive skin to monitor initiation and development in structure visualize them remotely using computer. However, material used sensitive not suitable for large-scale monitoring. this article, magnetic wire smart film structures. Fabrication film, working principle application on real bridge will be presented discussed. The results...

It is difficult for the existing point monitoring methods to find initial crack on civil infrastructure. In this article, by adopting area method, sensitive skin and relative sensing system proposed, which has ability real-time monitor surface of The composed three main parts: skin, secondary processor, terminal processor. concrete specimen experiments show that can structural with width down 0.02 mm reflect shape length effectively. Because whole circuit digital most consumed inexpensive,...

The prestress loss is one of the main factors affecting safety prestressed concrete structure. While detecting signals like sound and light are difficult to spread in steel strands, there no effective method for detection bonded strands existing structures yet. In this paper, taking into consideration that electromagnetic oscillation characteristic can make signal propagate effectively on a nondestructive based effect detect frequency proposed. circuit, simulated as an inductance component,...

Coda waves are highly sensitive to changes in medium properties and can serve as a tool for structural health monitoring (SHM). However, high sensitivity also makes them susceptible noise, leading excessive dispersion of results. In this paper, coda wave multi-feature extraction method is proposed, which three parameters, the time shift, stretch, amplitude variation trains within window, totally derived. These parameters each mapped temperature variations concrete beams, then combined...

Structural health monitoring plays an important role in protecting civil infrastructures. Smart film bionic method and video image have advantages of high speed perceptual intuition, so they been well applied structural monitoring. However, the two methods are difficult detecting stress condition limited some aspects. In this paper, a system based on piezoelectric element array is proposed. The experiments show it can detect effectively display results by matrix images directly.

Smart film crack monitoring method, which can be used for detecting initiation, length, width, shape, location, and propagation of cracks on real bridges, is proposed. Firstly, the fabrication smart developed. Then feasibility method analyzed verified by mechanical sensing character under two conditions normal strain initiation. Meanwhile, coupling interference between parallel enameled wires discussed, then low‐frequency signal custom communication protocol are to decrease interference. On...

WSN (wireless sensor networks) is a kind of energy-constrained network, which has been widely used in precision agriculture environment monitoring. However, power balance not taken into account traditional routing algorithms. In this paper, novel Power Balance Ad hoc On-Demand Distance Vector (PB-AODV) algorithm proposed on cross-layer design to solve the problem balance. The main idea our that, path established by received signal strength indication (RSSI) value route discovery process...

This article presents a case study on using the ChatGLM model to transform automated customer service responses in an expressway toll station system. The traditional methods are impractical for millions of daily inquiries, leading robotic responses. enhances dialogue capabilities by providing accurate and informative responses, trained large dataset conversations. discusses voice question answering challenges booths potential improvements through ongoing research. proposed intelligent...

In monitoring the structural health of concrete bridge, one most pressing problems is crack identification. Commonly used systems could not solve initial diagnosis bridge structure and development cracks. Thus smart film for bionic was introduced. The simulated distribution neurons such that neural context organism perceived all local changes (such as cracking) internal or external to thus able monitor cracks structures in critical areas based on principle bridge. capable current experiment...

Lots of applications in Wireless Sensor Networks (WSN) are related to location information. The cost the hardware on WSN nodes hinder application distance-based localization technologies that depend absolute point-to-point distance measurement. Schemes distance-independent being put forward instead more expensive algorithm. APIT is one typical algorithms. But algorithm requires all participating anchor within a single hop from location-unknown node (test node) and demands nodes’ density...

In this article, the model and algorithm developed in our previous work are used to investigate thickness effect length of piezoelectric patch influence substrate material properties on responses piezoelectric-elastic structure. For an actuator-substrate structure, a thicker may be preferable decreasing stress concentration. Longer patch, lower interfacial normal stress. The stresses will go up with increase stiffness host materials. sensor system, strain transfer from decrease patch. output...

In the field of structural health monitoring concrete bridges, one most important problems is crack identification. previous studies, sensitive skin for bionic bridges had been used to monitor initiation and development in a structure, it was visualized by computer. But there are several that prevented this method from being widely applied. paper, smart film proposed large scale structures. To bridge film, electrical mechanical characters were analyzed separately based on LED (light emitting...

In the field of structural health monitoring concrete bridges, one most important problems is crack identification. previous studies, sensitive skin for bionic bridges had been used to monitor initiation and development in a structure, it was visualized by computer. But there are several that prevented this method from being widely applied. paper, smart film proposed large scale structures. To bridge film, mechanical electrical mechanism were analyzed separately based on fracture mechanics...

Smart film that was proposed in 2010 may monitor cracks of concrete bridges remotely and automatically. In the method, virtual reconstruction crack plays an important role providing intuitive foundations for bridge maintenance. Original data implies crucial information, while previous is considered simply. this paper, we redesign method basing on B-spline curve optimized by using Genetic Algorithm (GA). Three steps are adopted to optimize parameter vector number control points B-spline: (1)...

In this paper, a novel crack detection sensor based on finite element principle is presented. A measurement system of the has been constructed to validate design. The results show that advantage detecting complex crack. This can be used in aircraft and large motor casing similary.