Non Destructive Testing Methods for Reinforcement Steel

Ultrasonic inspection device for evaluating the reinforcement state of steel and GFRP reinforcing bars in concrete structures and assessing concrete soundness. The device employs a probe to penetrate the concrete, transmitting ultrasonic waves that reflect off the reinforcement. The reflected signals are analyzed to determine reinforcement presence and arrangement, providing a comprehensive assessment of both reinforcement quality and concrete integrity. This non-destructive method enables the evaluation of both magnetic and non-magnetic reinforcement materials, as well as concrete quality, through a single inspection process.

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A method for detecting corrosion in reinforced concrete beam-slab structures through non-destructive monitoring. The method employs a combination of laser-based sensors and cameras to measure the deformation of steel bars at specific cross-section positions. By establishing a quantitative relationship between steel bar corrosion rates and structural deformation, the method accurately identifies corrosion damage through precise measurement of the steel bar's position on the beam-slab structure. This enables early detection of corrosion issues before they compromise the structure's integrity.

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Non-destructive testing method for detecting cracks in reinforcing bars and steel in concrete structures using magnetic flux leakage. The method employs a magnetic flux measurement section to detect leakage around buried reinforcement elements, enabling precise fracture detection even when the reinforcement is partially exposed. The technique can be adapted for various reinforcement types, including steel wires, and provides accurate fracture length estimation even in inclined concrete surfaces.

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Non-destructive inspection method for detecting concrete reinforcement bar breaks using magnetic flux measurement. The method employs a sensor array to measure magnetic flux variations caused by reinforcement bar discontinuities. By analyzing the sensor data, the method determines the depth and length of the reinforcement bar break, enabling accurate location and characterization of reinforcement bar failures in concrete structures.

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Non-destructive testing of reinforced concrete structures using an alternating magnetic field to induce vibrations. The transducer employs a rotating disk with permanent magnets to generate controlled vibrations, which interact with the concrete and steel reinforcement through eddy currents and magnetic fields. The vibrations are measured using a vibration-detection system, enabling precise detection of bar cracks and corrosion through the characteristic changes in the reflected signal. This method offers a non-invasive, high-sensitivity approach to inspecting reinforced concrete structures without compromising their integrity.

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A steel bar strength detector that accurately measures the deformation caused by external forces on long steel bars. The detector comprises a base, a top plate, a screw rod, and a servo motor. The servo motor drives a screw rod that moves a slider. A pressure sensor is positioned above the slider. The detector measures the deformation caused by external forces on the steel bar through the pressure sensor, enabling comprehensive strength evaluation of the reinforcement.

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Non-destructive inspection method for detecting damage in concrete structures using magnetic flux measurement. The method employs a leakage magnetic flux method to detect damage in buried inspection targets like reinforcing bars, steel rods, or wires. It achieves accurate detection by analyzing the magnetic flux patterns generated by target material leakage. The method compensates for potential variations in magnetic field due to target material properties and arrangement, ensuring precise fracture location determination.

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A magnetic control system for nondestructive testing of prestressed reinforcement in concrete structures that improves reliability by eliminating the variable effects of transverse reinforcement. The system employs a U-shaped magnetization configuration with magnetized elements positioned parallel to the working ends of the magnetization system. This design enables precise control of the signal despite the variable influence of transverse reinforcement, which can cause signal drift. The system achieves this by using a specific positioning of the magnetized elements that compensates for the varying effects of transverse reinforcement.

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Non-destructive testing method for evaluating the quality of anti-cracking steel mesh in concrete structures through surface area coefficient measurement. The method involves scanning the relationship between the specific surface area coefficient of steel mesh and electromagnetic signal values in concrete specimens, and then calibrating the corresponding signal values to determine the quality of the steel mesh. This enables non-destructive inspection of the mesh's performance in concrete structures without compromising the integrity of the concrete.

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A device for evaluating the corrosion state of reinforcing bars in reinforced concrete structures. The device employs time-frequency analysis to extract meaningful frequency components from the reflected wave patterns at the surface of the concrete slab. By removing the surface reflections, the device enables detailed analysis of the internal wave patterns that are indicative of corrosion progression. This approach provides a more accurate and comprehensive assessment of the reinforcing bar corrosion state compared to traditional surface-based methods.

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Non-uniform corrosion monitoring sensor for existing reinforced concrete structures using magnetic field-based detection. The sensor employs a unique configuration that enables accurate measurement of steel bar corrosion rates across complex concrete geometries, particularly in areas with varying steel bar positions. This sensor addresses the limitations of traditional uniform corrosion testing methods by providing comprehensive, real-time monitoring of steel bar corrosion in existing concrete structures.

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A device for automatically detecting damage to steel members in concrete structures, particularly in high-risk environments. The device employs non-destructive testing methods to monitor the condition of steel components in real-time, eliminating the need for manual inspection. The system integrates multiple sensors to detect corrosion, cracks, and other damage indicators through radiography, thermal imaging, and mechanical measurements. This enables continuous monitoring of steel components in the field, reducing labor costs and improving detection accuracy compared to traditional manual methods.

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A steel corrosion detection device for reinforced concrete structures that enables precise monitoring of internal corrosion through a novel combination of mechanical and electrical detection systems. The device comprises a moving mechanism that drives a detection mechanism to position itself at the interface between the concrete and steel, while an electrical connection between the detection mechanism and analysis system enables real-time data processing. This integrated approach provides accurate and continuous monitoring of internal steel corrosion through both mechanical movement and electrical analysis.

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A non-destructive testing system for detecting steel bars in concrete structures using advanced neural network-based analysis. The system employs a multi-coil sensor array to detect steel bars through eddy current effects, while a specialized neural network model trains on the sensor data to predict both steel bar diameter and concrete thickness. The system's advanced analysis capability enables precise thickness measurement and diameter determination, overcoming limitations of traditional methods that rely on single-coil detection.

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Nondestructive testing method for detecting damage in long steel rods embedded in concrete structures through precise measurement of magnetic flux density. The method employs a specialized sensor that measures the magnetic field around the steel rods while avoiding interference from surrounding concrete. The sensor's unique design allows accurate detection of rod damage without compromising the measurement of surrounding concrete's magnetic properties. This approach enables reliable identification of rod fractures through the precise measurement of magnetic flux density, while maintaining the integrity of the surrounding concrete.

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Non-destructive method for precisely measuring the corrosion state of reinforcing bars in reinforced concrete structures using radar-based vibration analysis. The method employs a vibration radar system that generates low-frequency vibration signals within the concrete, while a high-frequency radar signal is applied to the reinforcing bar. The radar signals interact with the bar's vibration response, producing a reflected signal that is measured using an orthogonal detector. This dual-frequency approach enables accurate detection of corrosion effects on the reinforcing bar's vibration characteristics, independent of external crack presence.

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In-situ monitoring of steel bars in reinforced concrete using wireless eddy current and electrochemical sensors. The system embeds sensors into the concrete during production, with the sensors connected by wireless charging. The system enables real-time monitoring of steel bar corrosion and thinning through simultaneous wireless data transmission between the sensors and a central analysis system. This approach eliminates the need for manual sampling, providing comprehensive monitoring of steel bar condition across large-scale concrete structures.

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Monitoring device for reinforced concrete structures that enables precise and non-invasive detection of steel bar corrosion rate through a novel ring-based sensor system. The device comprises a stainless steel ring with a hollow core, where the steel bar passes through the core and is monitored by measuring electrical conductivity. The ring's unique design allows precise measurement of the critical corrosion zone without direct contact with the steel, while maintaining structural integrity. The system features a power source and indicator lamp, with the ring's internal structure providing a reliable and accurate measurement of the steel bar's corrosion rate.

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System for non-destructive monitoring of hollow structures like pipes and reactors using a combination of fiber-reinforced composite sensors and wireless radio units. The system enables continuous monitoring of structural integrity through sensor-actuated wireless data transmission, eliminating the need for traditional cabling while maintaining high reliability and security. The system comprises a central data acquisition and processing unit that receives and processes data from multiple sensor units connected to the structure, enabling real-time monitoring and analysis of the structure's condition.

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Electrical Capacitance Tomography (ECT) for inspecting reinforced concrete structures like bridges and pipelines, enabling non-invasive visualization of internal defects and degradation. The system employs wireless, variable-frequency excitation sensors that adapt to the varying dielectric properties of steel strands and grout along the structure's length, allowing real-time imaging of internal discontinuities. The sensors employ a modular design with wireless control capabilities, enabling autonomous travel along the structure's length. The system provides high-resolution images of internal defects, enables volumetric measurement of defects, and facilitates location and volume estimation of discontinuities.

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